276 results about "Structural dimension" patented technology

The invention discloses a low-noise design method of a centrifugal pump with low specific speed, and relates to an active control method of flow noise of turbomachinery. The design method comprises the steps that firstly, main structural dimensions of a centrifugal pump impeller and a helical pumping chamber (volute) are obtained by the traditional low-specific-speed pump design method; secondly, an internal flow field of the pump is computed by a computational fluid mechanics method; the performance of the pump is predicted whether to meet a design requirement; an optimum design improvement is performed by analyzing a stationary flow field; thirdly, flow induction noise of the pump with low specific speed is predicted by a computational acoustics method; if a flow noise index is qualified, the design is accomplished; if the flow noise index is disqualified, subsequent steps are performed; fourthly, the diameter of the impeller basically meeting a performance requirement in the design is adjusted to allow a gap between the impeller and a volute tongue to be increased continuously to 20%; splitter blades are added in the middles of blades to increase the lift, control the flow situation, and ensure the efficiency; and finally, the pump subjected to the impeller improvement design is subjected to noise prediction; if the flow noise index is qualified, the design is accomplished; and if the flow noise index is disqualified, the beginning step is repeated. The design method shortens the research and development period, saves the development cost, effectively improves the design quality of the centrifugal pump, can simultaneously meet low-noise requirements of the lift and the efficiency, and realizes optimization of the performance of the complete centrifugal pump with low specific speed.

The invention discloses a structural dimension parameter adjustable Mecanum wheel type mobile robot. The robot is composed of a structural dimension parameter adjustable Stewart platform and a Mecanum wheel type mobile platform, wherein the Stewart platform comprises a Stewart movable platform, a Stewart static platform and a linkage mechanism. The Stewart platform is a parallel robot which has six freedom degrees and is applicable to heavy load; the Mecanum wheel type mobile platform has the characteristics of heavy load and all-direction movement; a mobile parallel robot formed by combination of the Mecanum wheel type mobile platform and the Stewart platform has the characteristics of being movable in all directions, high in positioning precision, capable of being heavily loaded and flexible in adjustment of tail end posture, and is applicable to industrial demands of flexible processing, overloading transportation and the like. By respectively changing the structural dimension parameters of the Stewart movable platform and the Stewart static platform, the robot disclosed by the invention is correspondingly changed in overall height, tail end motion space range and bearing capacity so as to adapt to work demands, so the applicability of the Mecanum wheel type mobile parallel robot is improved.

The invention relates to a stray light suppression device for a star tracker of a spacecraft, which comprises a first suppression device and a second suppression device. The first suppression device and the second suppression device are sequentially arranged in the direction of stray light inlet in front of a probing optical system; both the first suppression device and the second suppression device are cylindrical; a plurality of light buffering rings are arranged in both the first suppression device and the second suppression device. The stray light suppression device reduces the interference of various stray lights to the star tracker during probing stars, ensures that the star tracker can perform star probing and star pattern identification, improves star detectivity and the navigation accuracy. In addition, and simultaneously considering that the spacecraft reach the limits of load capacity, material and structure and technology, the stray light suppression device realizes the optimal structural dimension within the allowable dimensional range.

The invention relates to a method for checking a useful load of auxiliary springs of a non-end contact diagonal primary and auxiliary spring, and belongs to the technical field of suspension steel plate springs. The method comprises the following steps: firstly, determining an endpoint deformation coefficient and the half rigidity of each main spring, as well as a deformation coefficient Gx-CB of the contact point between an Nth main spring and the auxiliary spring at an oblique line segment according to a structural dimension and an elastic modulus of the diagonal variable cross-section main spring with non-isostructural end parts; then, checking the useful load of the auxiliary springs of the non-end contact few-leaf diagonal variable cross-section main and auxiliary spring according to the thicknesses of root straight sections of the main springs, Gx-CB of the Nth main spring, the half rigidity of each main spring and a design value of the clearance Delta between the main springs and the auxiliary springs. The simulated verification shows that an accurate checking value of the useful load of the auxiliary springs of the non-end contact diagonal main and auxiliary spring can be obtained by using the method, the design level and performance of products are improved, the vehicle running smoothness is improved, meanwhile, the design, manufacturing and test costs are reduced, and the product development speed is increased.

A medical device comprising a probe for measurement temperature data of tissue within a patient's body is proposed. The probe (2) comprises a flexible substrate (3) attached to a medical device core (5), the flexible substrate (3) comprising one or more thermopiles (7) and may furthermore comprise resistors for measuring an absolute temperature and heat sources for locally applying heat. The thermopiles can be processed directly on a flexible polymer carrier or, alternatively, on a silicon substrate and transferred to a flexible carrier (3) enabling both, a highly flexible substrate (3) and very small structural dimensions for the thermopiles (7) and, possibly, the resistors and heat sources. Accordingly, measurement of temperature gradients of tissue being in contact to the medical device may be performed at high resolution allowing reliable detection of temperature anomalies e.g. due to malign tissue.

The invention relates to the technical field of aerogels. In order to solve the problem that no simple preparation technique for controlling the pore size and surface properties of the three-dimensional graphene can implement effective control on the structural dimension, lamellar action mode, interface properties and the like of the three-dimensional graphene, the invention provides a preparation method of a silane functionalized graphene aerogel material. The method comprises the following steps: preparing a functionalized graphene hydrogel, and preparing the functionalized graphene aerogel. The preparation process is nontoxic and pollution-free. The prepared graphene aerogel can be used in the fields of oil-water separation, pressure-sensitive / gas-sensitive, polymer nano composite materials and the like.

The invention, which belongs to the field of error compensation of a numerically-controlled machine tool, provides a modeling and compensation method of a radial thermal drift error of a spindle of ahorizontal numerically-controlled machine tool. Two thermal drift errors along the radial direction of a spindle of a umerically-controlled machine tool and corresponding key point temperatures are tested; on the basis of a thermal tilt deformation mechanism of the spindle, a thermal inclination angle of the spindle is obtained and the correlation between the thermal inclination angle and the temperature difference between the left side and the right side of a spindle box is analyzed; according to the positive or negative situation of the thermal drift errors of the tested two points and stretching or contraction situations of the left side and right side of the spindle box, a thermal deformation situation of the spindle is classified and thermal drift error models under various thermal deformation attitudes are established; the influence on the model prediction result by the structural dimension of the machine tool is analyzed; and during real-time compensation, the thermal deformation attitude of the spindle is automatically determined based on the temperatures of the key points and the spindle is compensated by selecting a corresponding thermal drift error model automatically. Therefore, the determination of the thermal deformation attitude of the spindle of the numerically-controlled machine tool is realized during the processing process; and on the basis of the thermal deformation mechanism, the radial thermal drift error of the spindle is predicted.

The invention relates to a multi-ejector parallel type solar ejecting refrigeration unit which utilizes solar energy to supply cold air, which comprises a solar hot-water loop, an ejecting refrigerant loop and an air conditioner water loop. The unit solves the problems that the prior ejecting refrigeration system is only provided with an ejector, the structural dimension of the ejector is fixed and the efficiency of an ejector system is drastically declined directly because operation condition is derivated from design condition. The unit is arranged between a generator and a condenser, and is provided with two or more than two ejectors with different structural dimensions in parallel. The multiple ejectors can meet high-efficiency operation of variable working conditions; and the unit can automatically or manually switch to a proper ejector for working according to solar radiation or weather changing conditions, further ensure that the system operates in refrigeration season with high efficiency, can improve the operation efficiency of the solar ejector system, and realize the aim of supplying the cold air with high efficiency and reasonability, thereby improving the utilization rate of solar energy, saving energy, relieving the pressure of electricity grid at the peak time, and improving the light-heat utilization efficiency.

The invention discloses a compliant force control method based on fuzzy reinforced learning for a mechanical arm. A fuzzy reinforced learning algorithm is adopted, a real-time adjustment strategy for admittance parameters is trained in a manner of online learning, and a motor is controlled by the converged variable-admittance control strategy according to an external moment applied by an operator, and the current joint speed and acceleration to actively comply with a control intention of the operator, so as to complete an active following task of the mechanical arm, without the need of establishing corresponding task and environment model, so that a higher convergence speed and a stable actual effect are achieved. The method is capable of remarkably lowering the working intensity of the operator and improving the location accuracy, and conducive to reduce the structural dimension and the dead weight of the mechanical arm; a haptic human-machine interaction model is capable of greatly responding to the control intention of the operator, and high in self-adaptive capacity, so that haptic human-machine interaction experience is smoother and more natural, and more similar to haptic interaction experience during operation for an actual object in daily life.

The embodiment of the invention provides a sensitive and large-signal output minisize pressure sensor, specifically including that a conductive floating layer of capacitance part of the sensor is modified and extended to a gate insulation layer of the MOSFET device to form a floating gate of the MOSFET device, accordingly the capacitance part of the sensor is separated from the MOSFET device therebelow, and the structural dimension of which does not influence the MOSFET device, therefore the MOSFET device can be made into smaller dimension which is suitable to be used in micro / nano system, simultaneously can overcome effectively short channel effect of device, improve simulated attribute of circuit, accomplish signal amplification directly with larger amplification multiple, reduce development and application costs of sensor without using high-dielectric material.

The invention provides a chip packaging method and a chip packaging structure, wherein the chip packaging method comprises the steps of providing a first chip which comprises a first surface and a second surface that oppose each other, wherein the first surface of the first chip is provided with a plurality of first pads; providing a second chip with a third surface and a fourth surface that oppose each other, wherein the third surface of the second chip is provided with a plurality of second pads and the area of the second chip is larger than that of the first chip; providing a carrier plate; combining the fourth surface of the second chip with the surface of the carrier plate, wherein the plurality of second pads are arranged outside the combining area between the first chip and the second chip; forming a sealing material layer on the surface of the carrier plate, wherein the sealing material layer packages the first chip and the second chip; and forming a first conductive structure and a second conductive structure in the sealing material layer, wherein the first conductive structure is electrically connected with the first pads and the second conductive structure is electrically connected with the second pads. A package which is formed according to the chip packaging method has advantages of reduced structural dimension, improved stability and improved reliability.

The invention discloses a disc brake for monitoring positive brake pressure, which comprises a brake disc, a brake shoe, a lining board, a disc spring, a hydraulic cylinder, a connecting screw, and a piston, wherein the bottom of the disc spring is provided with disc spring seat sensors which contact the small diameter of the disc spring, and the front part of the disc spring is provided with a disc spring seat sensor retaining ring; or contact positions of disc spring strips are adjusted when the disc spring strips of the disc spring are stacked, and the front part of the disc spring is provided with the disc spring seat sensors which contact the small diameter of the disc spring. The bottom or the front part of the disc spring is provided with the disc spring seat sensors in different directions by utilizing the limited space for placing the disc spring, installation dimensions of the disc spring seat sensors are the same as those of the prior disc spring seat of the prior brake, the disc spring seat sensors can be replaced on the spot, and the aim of directly monitoring the positive brake pressure can be achieved without changing prior performance parameters of the prior brake and structural dimensions of other parts, thereby greatly improving the reliability of the disc brake of a hoisting machine. The disc brake has the advantages of simple structure, convenient installation and maintenance, high measuring accuracy, and broad applicability.

An anatomical visualization and measurement system including a first database of 2-D slice images and a second database including a 3-D computer model defining a first software object. Apparatus is provided for selecting a 2-D slice image from the first database. Apparatus is also provided for inserting a second software object into the 3-D computer model. The second software object includes a planar surface and is inserted into the 3-D computer model at the position which corresponds to the position of the selected 2-D slice image relative to the scanned structure. Apparatus is also provided for texture mapping the 2-D slice image onto the planar surface. Display apparatus is provided for displaying an image which simultaneously provides a view of the first software object and the 2-D slice image texture mapped onto the planar surface. An apparatus and method are also provided for determining structural dimensions and volumes.

An online user relation measurement and classification method based on a three-dimensional relation strength model includes the step of setting up the three-dimensional relation strength model, the step of setting up a visualized model of relation strength, the step of measuring the social network user relation and the step of social user classification and recommendation. Social relations of users in a social network are abstracted into three basic dimensions, namely, the structure dimension, the psychological dimension and the tool dimension, and the dimensions are continuous variables from zero to one. Vectors of the three dimensions are mapped to three basic colors, then the problem of the relation strength can be converted into the color problem, and therefore visualized analysis on the relation strength can be conducted. According to the different relation classifications, the relations between the users are more accurately classified, and therefore basis is provided for subsequent processing, and the user classification and recommendation method which is more practical, more convenient to implement and more accurate can be provided for social network service platforms such as the SNS.

Photonic Band Gap (PBG) structures are utilized in microwave components as filters to suppress unwanted signals because they have the ability to produce a bandstop effect at certain frequency range depending on the structural dimensions. The unique property of PBG structures is due to the periodic change of the dielectric permittivity so interferences are created with the traveling electromagnetic waves. Such periodic arrangement could exist either inside of the dielectric substrate or in the ground plane of a microstrip transmission line structure. This invention provides tunable or switchable planar PBG structures, which contains lattice pattern of periodic perforations inside of the ground plane. The tuning or switching of the bandstop characteristics is achieved by depositing a conducting island surrounded by a layer of controllable thin film with variable conductivities. The controllable thin film layer could be photoconductive or temperature sensitive that allows change in its conductivity to occur by means of light illumination or temperature variation. Instead of depositing the controllable thin film with variable conductivity, freestanding thin film such as MEMS structures can also be utilized as the medium between the conducting islands and the ground plane. According to this invention, bandstop characteristics of the planar PBG structure are switched off when the controllable thin film is conductive or the freestanding thin film is in contact with the conducting islands and the ground plane. Meanwhile the bandstop characteristics are switched on when the controllable thin film is resistive or the freestanding thin film is not in contact with the conducting islands. At the end, switching uniplanar-compact PBG (UC-PBG) structures with photoconductive or temperature sensitive material, which is deposited inside of the gaps located in the ground plane, is also described.

The invention relates to the field of vibration application and electric power technology, and particularly to a right-angled piezoelectric cantilever beam vibration energy harvester. The right-angled piezoelectric cantilever beam vibration energy harvester comprises a supporting base and a horizontal metal substrate which is mounted on the supporting base. The horizontal metal substrate is provided with a piezoelectric ceramic wafer at the end which is next to the supporting base. A vertical metal substrate is adhered to the other end of the horizontal metal substrate. The horizontal metal substrate is perpendicular with a vertical metal substrate, thereby forming a right-angled cantilever beam structure. The other end of the vertical metal substrate is provided with a mass block. According to the right-angled piezoelectric cantilever beam vibration energy harvester, the right-angled cantilever beam is formed through adding an auxiliary cantilever beam at the end of the horizontal cantilever beam. Through controlling the structural dimensions of the horizontal cantilever beam and the vertical cantilever beam and the mass of the mass block, controlling for an interval between two front stages of modal frequencies is realized, thereby forming a relatively wide operation frequency band and realizing high-efficiency acquisition and conversion for environment vibration energy.

The invention relates to an early fault determining method for a bearing. The method comprises the steps of cutting an acquired bearing vibration time domain signal into N groups of secondary vibration signals according to the same length; 2, calculating local spectral band energy Mg of each secondary vibration signal, namely, 1) performing frequency domain conversion for each secondary vibration signal; 2) selecting a local spectral band from the whole Hilbert marginal spectrum based on the formula shown in specification as the interval, wherein fp is the bearing fault characteristic frequency calculated based on the bearing structural dimension, and delta f is 2Hz; 3) calculating the local spectral band energy through the formula shown in the specification, wherein h(f) is frequency amplitude in the local spectral band; 3, creating a local spectral band energy sequence through N Mg, wherein the local spectral band energy value of each vibration signal is Mf when the bearing is free of a fault; Mg is not less than the product of K and Mf at M times in the sequence, wherein K is a constant; the characteristic power rate (CPR) is determined according the formula shown in the specification; 4, determining the early fault when the CPR is more than or equal to some constant A.

Photonic Band Gap (PBG) structures are utilized in microwave components as filters to suppress unwanted signals because they have the ability to produce a bandstop effect at certain frequency range depending on the structural dimensions. The unique property of PBG structures is due to the periodic change of the dielectric permittivity so interferences are created with the traveling electromagnetic waves. Such periodic arrangement could exist either inside of the dielectric substrate or in the ground plane of a microstrip transmission line structure. This invention provides tunable or switchable planar PBG structures, which contains lattice pattern of periodic perforations inside of the ground plane. The tuning or switching of the bandstop characteristics is achieved by depositing a conducting island surrounded by a layer of controllable thin film with variable conductivities. The controllable thin film layer could be photoconductive or temperature sensitive that allows change in its conductivity to occur by means of light illumination or temperature variation. Instead of depositing the controllable thin film with variable conductivity, freestanding thin film such as MEMS structures can also be utilized as the medium between the conducting islands and the ground plane. According to this invention, bandstop characteristics of the planar PBG structure are switched off when the controllable thin film is conductive or the freestanding thin film is in contact with the conducting islands and the ground plane. Meanwhile the bandstop characteristics are switched on when the controllable thin film is resistive or the freestanding thin film is not in contact with the conducting islands. At the end, switching uniplanar-compact PBG (UC-PBG) structures with photoconductive or temperature sensitive material, which is deposited inside of the gaps located in the ground plane, is also described.

The invention relates to a dynamic modeling method for a torsional convex shoulder blade under elastic bearing based on a variable section beam. The method is a dynamic modeling method for a section variable torsional convex shoulder blade having a mounting angle with the consideration to a rotation effect of the blade and an influence of the elastic bearing. According to the dynamic modeling method, the cost expense required by a blade dynamic experiment is saved; a geometrical structure of the blade is closer to a real blade, so by only modifying a structural dimension and material parameters of the blade, dynamic models of different blade systems can be obtained, and thus the operation is simple and convenient; dynamic characteristics of the dynamic modeling method can more reflect a real working state of the blade; a bearing manner of the dynamic modeling method is closer to a real assembly state of the blade; compared with that the dynamic characteristics of the blade are analyzedby virtue of traditional commercial finite element software, the dynamic modeling method provided by the invention has higher computational efficiency; and meanwhile, a rub-impact response analysis of a blade system can further be performed, thereby providing a design optimization for a system structure containing the blade.

The invention discloses a foggy weather polarization image quality evaluation method. The foggy weather polarization image quality evaluation method includes the following steps that: characteristics of natural scene statistics (NSS) are extracted so as to be used for evaluating a foggy weather polarization original image under a natural scene and a polarization intensity image which is generated through analysis; according to an analysis scene image, natural scene characteristics are mapped into an analysis scene by means of an analysis formula (Stokes) and through utilizing the prior information of natural scene statistics, so that the quality of a typical polarization parameter image can be effectively evaluated; and finally, three kinds of factors including a brightness contrast factor, an inertia moment structural dimension factor, a Stokes parameter-based MSCN factor which are sensitive to the quality of two kinds of scene images can be formed selectively, and corresponding pooling strategies can be formed, and a unified framework for foggy weather polarization image comprehensive evaluation can be formed.

Metrology targets, design files, and design and production methods thereof are provided. Metrology targets comprising at least one reflection-symmetric pair of reflection-asymmetric structures are disclosed. The structures may or may not be periodic, may comprise a plurality of unevenly-spaced target elements, which may or may not be segmented. The asymmetry may be with respect to target element segmentation or structural dimensions. Also, target design files and metrology measurements of the various metrology targets are disclosed.

A transmission for a system, in which a directed force is introduced eccentrically with respect to a main shaft of the transmission, comprising the main shaft which is rotatably mounted in relation to a stationary housing by a main shaft bearing, a sun gear which is fixedly connected to the housing being arranged concentrically around the main shaft, and at least one control housing that rotates around the housing, wherein the first section thereof acts on the main shaft in a rotationally fixed manner and a planetary wheel is rotatably mounted by a first rotary bearing on the second section thereof, said planetary gear meshing with the sun gear. According to the invention, a force transmission means is fastened to the control housing and a drive crank rigidly engages the first end on the planetary wheel, wherein a second end of the drive crank is mounted in an articulated manner on a crank arm, said crank arm being supported in relation to the control housing by a movable coupling means. The aim of the invention was to provide a transmission having structural dimensions which are as compact as possible in the axial direction of the main shaft. Said aim is achieved in that the movable coupling means is a linear guide which absorbs tilting torques transmitted by the crank arm.

The invention discloses a transmission type artificial electromagnetic surface and a design method thereof. The transmission type artificial electromagnetic surface comprises a medium substrate, a random surface covering an upper surface of the medium substrate, and a frequency selection surface covering a lower surface of the medium substrate, wherein the random surface is an unit array composed of three-different-dimension basic units which are uniformly arranged in a random mode, and the frequency selection surface is a structural array formed by same square ring units having branch knots. The transmission type artificial electromagnetic surface is advantaged in that composite high frequency stealth and low frequency wave permeability functions are realized, and small thickness, light weight and easy processing are realized; the method comprises steps that (1), a traditional random surface design method is employed to design structural dimensions and spatial arrangement of each basic unit forming the random surface; (2), the square ring units having the branch knots are selected to form the frequency selection surface; and (3), basic composite units are constructed, and the structural dimensions of each unit are adjusted through electromagnetic simulation till high wave permeability and X wave band stealth requirements of the low frequency are satisfied.

The invention discloses a bridge expansion joint device, which comprises a special-shaped steel plate, an anchor bar and a waterproof tape; the special-shaped steel plate is provided with two groups, and the two groups of special-shaped steel plates are arranged to form a certain gap; the two ends of the waterproof tape are respectively connected to the Two sets of special-shaped steel plates; several anchor bars are evenly arranged on the special-shaped steel plates; on the special-shaped steel plates, an anchor plate one is also interlaced with the anchor bars; the anchor plate one is connected with the special-shaped steel plates; The special-shaped anchor bar and the corresponding anchor plate are arranged on the steel plate of the heterosexual expansion joint, so that the bridge expansion joint device of the present invention has a strong bearing capacity and is not easily deformed. Its structural size and installation position are reasonable, the noise is low, its bearing capacity is greatly improved, and its service life Long, with good usability.

The invention discloses a sinking and floating device for a small underwater vehicle. The device adopts a stepping motor as a driving mechanism; the stepping motor drives a lead screw to rotate, and the lead screw and a nut cooperate to drive a middle support plate to move, and the middle support plate drives two pistons When the mechanism moves, it absorbs water or discharges water synchronously, so that the water storage volume in the two piston cylinders changes. The diameter of the suction and discharge port of the piston cylinder is small, and the water flows through the piston rod to drive the rubber piston to quickly inhale or discharge the piston cylinder, changing the gravity of the aircraft; when the suction and drainage are produced, the force is generated and controls the attitude adjustment of the aircraft and the speed of ups and downs, changing the navigation. The gravity of the aircraft makes the aircraft produce downward or upward acceleration to realize the ups and downs of the aircraft. The vehicle sinking and floating device has small structural size and light weight, can precisely control the suction and displacement, and enhances the adaptability and operation ability of unmanned underwater vehicles in complex environments. The sinking and floating device is highly expandable and can be applied to small underwater robots and other small underwater delivery devices.

The invention belongs to the detection technology field and relates to a vibration signal acquisition method for an intershaft bearing. The method includes the steps: utilizing an accelerometer to acquire a vibration signal of an intershaft bearing and a specially-produced sensor installation clasp, the sensor installation clasp being formed by a left half clasp and a right haft clasp that have exactly the same symmetrical structure; and installing the accelerometer on the sensor installation clasp to minimize the influence of imbalance upon a rotor shaft due to installation of the sensor. According to the acquisition method, the structural dimension of the sensor installation clasp is determined at first, the accelerometer is then installed, and finally, the vibration signal of the intershaft bearing is acquired. The installation mode of the accelerometer is improved. The method is capable of accurately acquiring the vibration signal of the intershaft bearing, a signal to noise ratio of the signal is increased, data is provided for fault diagnosis and state monitoring of the intershaft bearing, and great convenience is brought to subsequent monitoring and diagnosis.

The invention relates to a method for strengthening a brick wall through fiber cloth, which comprises the following steps of: determining a part where a constructional column and / or a ring beam is to be arranged on a brick house or wall, and after surface treatment and surface modification, adhering vertical fiber cloth on the part where the constructional column is to be arranged on the brick house or wall; adhering transverse fiber cloth on the part where the ring beam is to be arranged; and adhering the transverse fiber cloth in the height direction of the constructional column at intervals. Different from an X-type or #-shaped strengthening method for improving shear performance of the wall, the method mainly improves the whole performance of the wall, can obviously improve the ductility and multi-defense capacity of the wall structure, and has the obvious advantages that: earthquake fissure is hard to generate on the fiber cloth adhering part, the wall is high in strength and efficiency, convenient to construct, low in cost, corrosion-resistant, light in dead weight and easy to maintain, the construction period is short, the structural dimension is not increased, and the like; moreover, the method is favorable for protecting environment, easy to popularize and implement in villages and townships and can improve the earthquake resistance of the brick house.

The invention discloses a constructing method of a main tower of a cable-stayed bridge through circumferential prestressing force. The constructing method comprises the following steps of mounting a stiff framework; mounting and positioning anchor backing plates; mounting collapsing resistance reinforcing bars and corrugated pipes; blanking steel strand wires, and guiding bunches of steel strand wires into pores; performing formwork construction and concrete construction; performing prestressing force tensioning; performing pore grouting; and performing cutting and anchor sealing. According to the constructing method disclosed by the invention, the constructing efficiency and the mounting accuracy are effectively improved, the cutting of structural main reinforcing bars can be reduced, the anticorrosion capacity can be effectively improved, the structural dimension and the using safety of the structure are also guaranteed, little equipment is used during construction, and the working procedure is simple.

The invention relates to a BIM (building information modeling) combined utility tunnel intersection prefabricated component optimization method. The method includes steps: (1) adopting a BIM technique for modeling of a tunnel body and each functional node; (2) implementing dynamic monitoring on pipelines entering a tunnel according to modeling information, calculating structural dimensions required by communication of upper and lower chamber pipelines of main and branch utility tunnel intersections on the basis of information of the pipelines entering the tunnel, and analyzing and demonstrating calculated dimension information; (3) analyzing and demonstrating the calculated dimension information, and performing special secondary design of medium plate prefabricated components on the basis of the demonstrated dimension information; (4) prefabricating, namely manufacturing utility tunnel intersection prefabricated components according to secondary design results, and designing an integral utility tunnel intersection layout. The method has advantages of flexibility in mounting timeliness, convenience and quickness in component demounting and replacement and high integrating degree in long-term pipeline planning and capacity increasing.

The invention relates to a high-reliability permanent-magnet synchronous motor based on redundancy and fault-tolerant technology, which comprises a shell, two rotor assemblies, two stator assemblies, rotating shafts, bearings, insulating sleeves, a magnetic isolation plate and an end cover, wherein the two stator assemblies are coaxially connected in series; windings in each stator assembly are centralized single-layer windings which are isolated by teeth and embedded in fractional slots, and an electrical fault-tolerance structure is formed among the phase windings; due to the structural dimension design of the stator tooth slot, the induction of the phase winding of the motor is enhanced, thereby effectively inhibiting the short-circuit current; the two rotor assemblies are connected in series on the same shaft and are respectively arranged in the two stator assemblies; magnetic steel in each rotor assembly is of a thickness-unequal magnetic steel structure; the magnetic isolation plate is arranged between the adjacent two stator assemblies and is used for isolating electromagnetic interference between the stators and rotors at both ends; the two bearings are respectively arranged in bearing chambers of the shell and the end cover; and all the assemblies are packaged by the shell and the end cover together. The permanent-magnet synchronous motor provided by the invention has favorable physical isolation, magnetic isolation, thermal isolation and electrical isolation capabilities, and the reliability of the motor is greatly enhanced.