176results about How to "Skilled" patented technology

The invention relates to a time-resolved spectrum measurement instrument, in particular to a modularized femtosecond time-resolved transient absorption and fluorescence depletion two-in-one spectrometer. The modularized femtosecond time-resolved transient absorption and fluorescence depletion two-in-one spectrometer comprises an instrument optical flat, a pumping light path system and a probing light path system consisting of a plane mirror, a convex lens, a light diaphragm, a light filter, a time delay line, nonlinear optical crystals and a sample system, and also comprises a spectrum detection system. Since the spectrometer uses the optical flat as a bottom plate and various optical components, the modularization of the instrument is realized and the instrument can be moved on the whole; since a femtosecond time-resolved transient absorption spectrometer and a femtosecond time-resolved fluorescence depletion spectrometer are integrated into one, working personnel can conveniently conduct adjustment and the spectrometer can be widely popularized and used.

The invention discloses a sliding input method capable of simplifying a touch screen operated by a user with high input speed. The method comprises the following steps: a, pressing a mouse cursor within a push button control range of a screen keyboard; b, filtering press information of a push button control, and storing a coordinate value when the mouse cursor is pressed; c, sliding the mouse cursor, starting a timer to time the retention time when the mouse cursor slides, and simultaneously storing a coordinate value when the mouse cursor leaves or bounces; d, comparing the coordinate value in the step b with the coordinate value in the step c, and sending a character corresponding to the coordinate value in step b if the two coordinate values are the same or basically consistent, otherwise, turning to a step e; e, if the timing is not finished when the mouse cursor leaves or bounces, resetting the timer, otherwise, sending a character corresponding to the coordinate value in the step c and resetting the timer; and f, processing the characters sent by the steps d and e, and displaying the result on the screen keyboard.

The invention discloses an induction heating auxiliary surface ultrasonic rolling device and method. The device comprises a lathe chuck, a running center and a lathe cutter holder, the surface ultrasonic rolling device further comprises an induction coil, a movable arm, an induction power source and an infrared temperature measuring gun, one end of the movable arm is used for mounting of the induction coil, the other end of the movable arm is fixed to the lathe cutter holder, the surface ultrasonic rolling device is fixed to the lathe cutter holder, the induction heating power source is turnedon, meanwhile, a lathe is started, a part rotates, a part in the induction coil work area is heated to the high temperature, in the whole process, the temperature is measured through the infrared temperature measuring gun, when a sample is heated to the needed temperature, the part is subjected to surface ultrasonic rolling machining, through induction heating, the part deforming resistance is reduced, the surface ultrasonic rolling machining effect is better, the device is simple in structure, convenient to use, economic and environment-friendly, and the device can be used for machining shaft parts with high machining hardness and poor surface quality.

The invention relates to the field of construction, in particular to a construction method of a prefabricated pressure relief cone of a rebar concrete silo structure. The method includes the steps ofprocessing and curing a pressure relief cone prefabricated component at the first stage, making a preparation before the pressure relief cone prefabricated component is hoisted at the second stage, hoisting the pressure relief cone prefabricated component at the third stage, and binding pressure relief cone rebars and secondarily pouring and curing concrete at the fourth stage. The pressure reliefcone is constructed by hoisting the rebar concrete prefabricated cone, the cone is completed in a prefabricating field, manual operation is proficient, the construction process is easy to monitor, concentrated curing is beneficial for improving the quality of the concrete component, the labor environment of workers is improved, labor intensity is reduced, risks in the labor resource input and construction process are reduced, the installation work of warehouse bottom devices is developed when the prefabricated component is produced and cured, the project duration can be remarkably shortened,construction efficiency is improved, the on-site scaffold erecting work and formwork supporting work are reduced through mechanical installation, construction is rapid and convenient, project cost issaved, environment pollution and construction noise pollution are effectively reduced, and energy conservation and consumption reduction are facilitated.

The invention relates to the field of badminton training partners, and in particular to a badminton training partner robot. The badminton training partner robot comprises a frame, a beating device, a ball serving device, a control device, air storage devices and walking devices, wherein the beating device is connected with the frame; the ball serving device is mounted on the frame, and the ball serving device is positioned in front of the beating device; the air storage devices are positioned on the left side and the right side of the frame, and the air storage devices are connected with the beating device and the ball serving device through air transmission pipes; the walking devices are positioned under the frame, and the walking devices are connected with the frame through bolts; the control device is connected with the frame, and the control device is used for controlling the coordinate exercise of each prime motor of the robot. According to the requirements of badminton trainees, the badminton training partner robot achieves functions of badminton ball serving, pair exercise and pair exercise difficulty adjustment, and can provide a skillful badminton training partner for badminton amateurs.

The invention discloses a farming method for returning straw to the field locally in a corn and flue-cured tobacco rotating system. The method is applied to flue-cured tobacco and corn rotation plough land in a single cropping system and comprises the steps that firstly, corn is ridged to be cultivated, two rows of corn are planted per ridge, the height of each ridge is 30+ / -2 cm, the corn wide row spacing between every two adjacent ridges is 70+ / -5 cm, the narrow row spacing between two rows of corn on each ridge is 50+ / -5 cm, and the distance between plants is 25-30 cm; after the corn is harvested, ploughing is needless, original ridges and furrows are used, and the cut-off straw is directly spread over the furrows to be returned to the field; secondly, microorganism fertilizer is scattered on the straw, and soil on the ridges falls to the furrows for earthing and burying of the straw; in the next year, flue-cured tobacco base fertilizer is scattered in the furrows where the corn straw is buried 10-15 days before the flue-cured tobaccos are transplanted, the flue-cured tobaccos are planted in a single-row-ridge mode, the row spacing is 120+ / -5 cm, and the distance between plants is 50-60 cm; no-tillage ridge gathering is conducted towards the insides of the furrows along the two sides of each furrow, and ridges are formed for cultivating the flue-cured tobaccos. According to the farming method, the corn straw and the flue-cured tobacco straw are directly applied to the tobacco field locally, and therefore sustainable development of a tobacco region is effectively realized.

The embodiment of the invention discloses a method for carrying out interconnection control on equipment and electronic equipment, relates to the technical field of the electronic equipment and can solves the problems that the operation of a remote controller is inconvenient, and the user requirement cannot be met by the functions of the remote controller. The method comprises the steps of obtaining address information by first equipment; obtaining a file through a first communication channel by the first equipment according to the address information; controlling second equipment through a second communication channel by the first equipment by using the file. The method disclosed by the invention is suitable for the electronic equipment.

The present invention is a small online impact detection test stand which is characterized in that: an accelerated mechanism is an inertial accelerator that a motor and a belt pulley drive a roller assembly to rotate through a pneumatic clutch mechanism and a wire rope pulls a sliding platform to move, a clutch for an automobile is used to drive the acceleration mechanism, a dynamic condition of automotive driving is effective simulated, a frequency converter is used to adjust an impact acceleration, and impact pulse width adjustment is formed through synchronous adjustment of variable frequency drive frequency and a waveform pad. Thus an impact acceleration value and a pulse width are continuously adjustable in a large range, and the needs of small laboratory detection and production on-line detection are satisfied.

The invention relates to a portable automatic cardiopulmonary resuscitation instrument. The instrument comprises a shell, a defibrillation module which is arranged in the shell and used for performing cardiopulmonary resuscitation therapy on patients, and a respiration aid module which is arranged in the shell and used for providing respiration aid for patients. The defibrillation module comprises a defibrillation front panel which is arranged on a side of the shell and is provided with a placement slot at the bottom, a double-electrode-sheet component which is arranged in the placement slot and is used for being pressed against the chest of a patient to detect the heartbeat of the patient so as to judge whether to press or defibrillate the patient, a pressing aid component which is arranged on the double-electrode-sheet component and is used for detecting whether a patient is pressed in the right way or not during emergency treatment, and a defibrillation circuit which is arranged in the shell and is used for defibrillating a patient according to the heartbeat of the patient detected. The portable automatic cardiopulmonary resuscitation instrument can simultaneously perform electric shock defibrillation and respiration assistance which are at the same frequency. Better cardiopulmonary resuscitation can be performed on patients, and patients can get out of danger more quickly.

The invention discloses a cable fault analogue simulation system, and relates to the technical field of devices for teaching or training in an electric power system. The system includes a cable, a test end of the cable includes two paths, the first path of the cable test end is connected with a first main terminal of a single-pole three-throw switch K1, the main terminal of the single-pole three-throw switch includes three paths, the first path is connected to the ground after passing through a high-resistance fault setting module, the second path is connected to the ground after passing through a flashover fault setting switch, and the third path is connected to the ground after passing through a low-resistance fault setting switch; the second path of the cable test end is connected with a main terminal of a single-pole double-throw switch K2, the main terminal of the single-pole double-throw switch K2 includes two paths, the first path is connected to the ground after passing through a disconnection fault setting switch, and the second path is connected with the tail end of the cable. The system can simulate various cable faults, thereby reducing training time of employees, improving work efficiency, and the system has the characteristics of being simple in structure, being convenient to use and being low in manufacturing cost.

The invention relates to a graft hybridization method, in particular to a red wolfberry and black wolfberry graft hybridization method. The method comprises the following steps: grafting, to be specific, using a red wolfberry twig as a root stock, and using a black wolfberry twig with strong affinity as a scion; hybridizing, to be specific, selecting a successively grafted and vigorously growing plant as a hybridization parent. The method is unique and has strong affinity and high survival rate.

The invention provides a method and a device for debugging a variable-pitch system of a wind generating set. The device comprises a host computer, a main station device and a variable-pitch device, wherein the host computer is connected with the main station device through the Ethernet; the main station device is connected with the variable-pitch device through a CANopen bus; a user reads information of the variable-pitch system through the human-machine interface of the host computer and performs corresponding operation on the variable-pitch system; the program of the main station device is used for processing the state information of the variable-pitch system and the control command of the host computer; and the variable-pitch system is used for transmitting all state information to the main station device and receiving the control command transmitted by the main station device to perform actions such as pitch variation. The method and the device have the beneficial effects that due to the adoption of the technical scheme, the debugging device is small in size, and is easy and convenience to operate; the host computer is connected with the main station device through the Ethernet, so that safety and reliability are realized; and data are exchanged with variable-pitch device accurately and timely through a PDO (PHP Data Object) and an SDO (Service Data Object) of CANopen bus communication.

The invention relates to a method for adopting a structured query language (SQL) mark substitution method to achieve data self-extraction. The method comprises a first step of marking fields and conditions needing displaying in an SQL when the SQL with a random complexity needs to perform visualized data extraction, a second step of parsing selectable derived fields and selectable derived conditions in the SQL after marking, and obtaining metadata information corresponding to the fields and the conditions from an appointed database table according to the parsed data, a third step of generating a data extraction template aiming at all the marked SQLs on the basis of the obtained metadata information, and a fourth step of inputting marks of SQL fields and conditions needing extracting when the data are extracted, adopting the generated data extraction template to obtain the metadata information matched with the corresponding marks, utilizing the metadata information to substitute the fields and conditions needing extracting, and deriving the SQL after substitution. By establishing the data extraction template, the SQL is solidified to be in a graphic interface mode, and system supporting capacity and usability are improved.

The invention discloses a visible cerebral ventricle and subdural external drainage system. The visible cerebral ventricle and subdural external drainage system comprises a visible cerebral ventricle puncture system and a drainage system. The visible cerebral ventricle puncture system comprises a visible puncture guiding core, and LED light sources and a miniature camera are coaxially arranged at the intracranial end of the visible puncture guiding core. The wall of a puncture sheath is see-through, and millimeter scales are arranged on the outer wall of the puncture sheath. The visible cerebral ventricle and subdural external drainage system has the remarkable advantages that as the miniature camera can be connected to one end of the visible puncture guiding core, and a monitor is connected to the other end of the visible puncture guiding core, cerebral puncture is completely performed in a direct-viewing mode, precision is improved, and it is avoided that due to operation based on a rule of thumb, the cerebral tissue is damaged, or cerebral hemorrhage occurs. As miniature vanes (fixing clamps) are arranged at the position distant from the cerebral ventricle by 10 cm-15 cm and used for fixing a drainage tube at the incised skin, the defect that a drainage tube used for the current clinic is simply bound and fixed through threads is overcome.

The invention discloses a Z-axis tool setting gauge, belonging to the factory equipment technical filed, and comprises a monitoring operation portion, a collection work portion, and a data transmission portion. A main body portion is fixed directly above a cutter through holt hoop iron; other components are hidden in a housing through a small sliding table. The monitoring operation portion comprises a liquid crystal display screen and a physical control button. The collection work portion comprises a level, a bulb pressure transducer, an ultrasonic ranging inductor, an LED lamp, and a camera. The data transmission portion comprises a 51 single-chip microcomputer, a wireless receiver, and an emission module apparatus. By utilizing a shade and shadow coincidence principle, an auxiliary tool setting mode is innovated based on a control system theory, and only one-step installation is required, thereby solving the problems of repeated tool setting operation and serious damage to a cutter bit. The Z-axis tool setting gauge can be applied to a series of factory devices requiring Z-axis tool setting.

The invention provides an embedded device batch upgrading method and system. The embedded device batch upgrading method includes the step of adopting a server to continuously transmit related upgrading data packets to the to-be-upgraded embedded devices. The embedded device batch upgrading system is specially used for carrying out software upgrading on embedded devices, the upgrading data server continuously and circularly transmits the upgrading packets to the to-be-upgraded embedded devices having access to the system, and after having access to the system, the to-be-upgraded embedded devices receive complete upgrading data to complete upgrading. The method and system are wide in application platform and convenient to implement, have the remarkable effects in the aspects of improving device production of factory enterprises and the repairing efficiency, saving manpower and material resources and controlling cost, have the good application effect under the background that a user does not have corresponding professional knowledge, and are suitable for being promoted in enterprises where the intelligent embedded devices are produced and maintained.

The invention provides a robot profiling controller and a control method thereof. The robot profiling controller comprises a base, wherein a robot terminal equipment control knob, a control gain knob and a robot model are arranged on the base; and a robot model consists of simulated arms and simulated joints, wherein angle sensors are arranged in the simulated joints. The control method for the robot profiling controller is characterized in that the angle sensors are arranged in the simulated joints; when included angles between the simulated joints and the two simulated arms and an angle for twisting the two simulated arms change, the corresponding angle sensors send angle change information to a control system; after processing the angle change information, the control system sends a corresponding operation order to a controlled robot; and finally, the controlled robot performs the same action. According to the robot profiling controller and the control method thereof, the degree of automation is high; the robot can be simply and visually controlled; and an ordinary person can quickly grasp the operation and can expertly operate the robot, so that the application technical threshold of the robot is reduced, and the operation efficiency of the robot is improved.

A vacuum sintering cluster system for sharing a feeding-protective glove box includes a plurality of sintering chambers, a feeding-protective glove box and a self-control system. The vacuum sintering cluster system is characterized in that both the door of a combustion chamber and the door of the feeding-protective glove box adopt a board plug valve structure; a protection space is formed at the connecting locations of the doors of the sintering chambers and the doors of the feeding-protective glove box which are both board plug valve types; the feeding-protective glove box is arranged a vehicle chassis with a pushing mechanism; at least one feeding-protective glove box is arranged on a track; two feeding-protective glove boxes are reversely arranged on a pair of tracks; a plurality of sintering chambers are arranged at the outer side of the track to form the sintering cluster; the self-control system controls and dispatches the movable feeding-protective glove box to work, thus realizing to share one movable feeding-protective glove box by a plurality of combustion chambers by dynamic combination. The vacuum sintering cluster system can reduce the arrangement of the glove boxes by 80 percent, thus obviously saving the investment and fields, improving the operating factor of the feeding-protective glove box and greatly reducing the production and operation costs, thereby not only improving the stability of technique operation, but also being convenient for storing, transferring and managing materials; besides, the vacuum sintering cluster system is more beneficial to the technique stability and the management on the operation field.

The invention discloses a hand-held electronic shopping POS machine, which is suitable for prison management and is convenient to carry and easy to operate. The hand-held electronic shopping POS machine includes a POS body, and a bar code scanner, a radio frequency read-write device, a printing device, a touch screen and a built-in shopping POS system which are arranged on the POS body. The shopping POS system comprises a registration system unit, a shopping system unit, a data storage system unit, a data processing system unit, a time setting system unit and a module function testing system unit. The invention has the following advantages that the hand-held electronic shopping POS machine is used for prison management and is suitable for prisoners in prison to purchase goods; the shopping system has a shopping rule, which limits the types, the quantity and the consumption amount of goods purchased by prisoners so as to effectively manage the daily needs of the prisoners; the hand-held electronic shopping POS machine is convenient to carry and easy to operate and can be skillfully manipulated by anyone.

The invention discloses an erecting method for a chamfered setting steel formwork and belongs to the technical field of construction methods for constructional engineering. The erecting method for thechamfered setting steel formwork comprises the steps that 1, the chamfered setting steel formwork is manufactured at first according to the chamfering size; 2, a web formwork and an upper flange formwork are welded through equal leg angle main stiffening ribs, and the web formwork and a lower flange formwork are welded through equal leg angle main stiffening ribs, so that the integrality is enhanced; 3, steel pipes are welded between the main stiffening ribs; 4, an upper flange end stopping board is welded to the end portion of an upper flange and used for controlling the sectional dimension;5, longitudinal secondary stiffening ribs and transverse secondary stiffening ribs are welded to a lower flange; 6, bolt holes are drilled in the middles of the longitudinal secondary stiffening ribs; 7, a wall formwork is erected; 8, a platform formwork is erected; and 9, the lower flange is in butt joint with an erected wall. By means of the erecting method for the chamfered setting steel formwork, the problems that splicing beams at the chamfered position of the formwork are too large and the rigidity of the chamfered position of the formwork is poor can be solved, and splicing and reinforcing of combined use of the setting steel formwork with a wood formwork (or a plastic formwork) can also be achieved.

The invention discloses a method for additionally arranging a plastic accessory on a plastic conveyer belt and a plastic synchronous belt, relates to the technical field of conveyer belt and synchronous belt manufacture, and solves the technical problems of low operating speed, not attractive joint of the accessory and untight bond in the prior art. The method comprises the following steps of: 1) placing a part to be additionally arranged of a processed product on a welding bedplate of a high-frequency welding machine; 2) placing the plastic accessory to be additionally arranged in a mold consisting of a conductive internal mold and a heat-resistant insulating external mold, and inversely placing and fixing the mold on the part to be additionally arranged of the processed product on the welding bedplate of the high-frequency welding machine; 3) electrically connecting the conductive internal mold with the high-frequency welding machine; 4) starting the high-frequency welding machine, and supplying power to the conductive internal mold to generating high-frequency waves to fuse the plastic accessory with the processed product into a whole; and 5) closing the high-frequency welding machine. Through the method provided by the invention, the plastic accessory is closely bonded with the processed product, and the phenomena that the joint is cracked and the accessory falls off hardly occur.

The invention discloses a file scanning apparatus, which comprises a digital photographing mechanism and a computer connected therewith through data lines. The digital photographing mechanism includes a file page-turner provided on the bottom, an upright fixed axis on the file page-turner, a camera provided on upside of the fixed axis, photographing illuminating-lamps mounted at both sides of the camera, a control switch provided on the file page-turner; meanwhile, the invention discloses a file logging method. The apparatus of the invention is substantially automatically operated, operating process of a file scanning is fully controlled by a computer, which reduces personnel and optimizes resource allocation, adjustment and modification can be performed to error portion in time after error is happened; compared to prior art, the file logging method of the system is provided with simple steps, teeny error ratio, which has advantages of simple operation, high efficiency and excellent stability.

The invention discloses a glass plate production, storage and package tool, which consists of an upper protection corner and a lower protection corner and comprises a bottom plate, wherein a back plate is arranged at one side of the bottom plate in a direction vertical to the bottom plate, a protection plate vertical to the bottom plate and the back plate is installed by using a three-dimensional right angle clamped by the bottom plate and the back plate as a base, the protection plate clamps the bottom plate and the back plate for forming a glass plate accommodating groove, a traction fixing device projected out of the surface of the protection plate is arranged on the outer side surface of the protection plate, and an isolation protection device is arranged on the outer side surface of the protection plate beyond the traction operation range. The package tool is mainly made of metal materials, harmful organisms and ova are not contained, the inspection and quarantine treatment is not needed for export, the export requirements are met, the package tool can be conveniently recovered, the structure adopts the flexible connection, the size is small after the dismounting, the manufacture cost is lower than that of a wood package box, the integral cost is one twelfth of that of the wood package box, and the tool can be repeatedly used for more than twelve times.

The invention discloses a hand shaking three-fold stretching bridge type rescue device, and particularly relates to a rapid-supporting emergent rescue device. According to the rapid-supporting emergent rescue device, a telescopic rod is arranged, a three-segment folding platform is arranged at the top end of a hydraulic jack, and the device is used for automobile rescuing and capable of carrying out bearing. The telescopic rod is arranged between the platform and the hydraulic jack, and two sets of tooth-shaped protrusions are arranged in an outer casing pipe body of the telescopic rod; and according to the device, wheels of an automobile are supported through the three-segment folding platform on the jack, a telescopic plate further comprises a rear segment capable of stretching or drawing back, self-rescuing is completed by adjusting the longitudinal and transverse direction of the three-segment folding platform, longitudinal translation and transverse translation of the automobile can be achieved through the three-segment folding platform, the aims of safe operation, labor saving and convenient operation can be achieved, and practicability is high.

The invention discloses a quartz wafer grinding-cleaning machine and a grinding-cleaning process thereof, and is applied to the technical field of quartz wafer cleaning. According to the quartz wafergrinding-cleaning machine and the grinding-cleaning process thereof, the structure is simple, operation is convenient and fast, and the working efficiency is high. The quartz wafer grinding-cleaning machine comprises a rack, a first cleaning tank, a second cleaning tank and a third cleaning tank, and the first cleaning tank, the second cleaning tank and the third cleaning tank are sequentially arranged on the rack and internally provided with cradle frames; a wafer fixing device is mounted on each cradle frame in a matched mode, the rack is provided with three motors, and the three motors arecorrespondingly connected with the cradle frames in the first cleaning tank, the second cleaning tank and the third cleaning tank; and circulating pipes are arranged between the first cleaning tank and the second cleaning tank as well as the second cleaning tank and the third cleaning tank, the upper end of the third cleaning tank is provided with a water injection pipeline, and the side end of the first cleaning tank is provided with a draining pipeline.

The invention discloses a vehicle speed safety display device which is provided with a speed sensing unit, a processing unit, a signal output unit and a displaying unit, wherein the speed sensing unit is used for sensing the speed of a vehicle and outputting a speed signal; the processing unit is connected with the speed sensing unit; the signal output is used for receiving a signal from the processing unit and outputting a digital signal; and the display unit is connected with the signal output unit and arranged on the external front side, the external rear side or the roof of the vehicle. The vehicle speed safety display device has a simple structure, can be conveniently installed and used, and can improve the safety in driving a vehicle.

The invention discloses a tea tree grafting method. The method comprises the following steps of 1, sawing rootstocks; 2, selecting scions; 3, cutting the rootstocks; 4, cutting the scions; 5, inserting the scions; 6, binding the scions and joints; 7, conducting management after grafting. An electric hand saw is used for sawing the rootstocks, cuts of the sawn rootstocks are smooth, and phloem is free of tearing. Compared with the traditional mode that a sabre saw is used for sawing the rootstocks, the labor intensity and the labor cost are reduced, and the working efficiency is improved; in addition, an oblique cutting method is adopted, the cuts are small, the water loss area is reduced, and nutrients and energy consumption required by wound healing are reduced; the joints can be sealed by using plastic belts for binding, and a moisture retention effect is achieved on the scions, so that sap produced by the rootstocks and the scions smoothly flows, and the survival rate is improved. By using the oblique cutting method for grafting, the method is simple and easy to implement, and a plastic bag for bagging and a sunshade net for shading are not required after grafting. According to the method, the labor intensity and the grafting cost are greatly reduced, popularization is easy, and the method can be popularized in the improvement of a low-yield tea garden.

The invention provides a micro-fluidic chip based on electrohydrodynamics, a micro sample application device and a micro sample application method. The chip comprises: at least one capillary tube having an inlet end and an outlet end; a chip body, which comprises at least one sample inlet, and a micro-channel connected with the sample inlet and a capillary tube embedding channel connected with the micro-channel, wherein the capillary tube embedding channel is provided with an outlet end, the capillary tube is arranged in the capillary tube embedding channel and connected with the micro-channel, and the length of the capillary tube is larger than that of the capillary tube embedding channel; an upper electrode which is positioned on the chip body and is close to the capillary tube; and a lower electrode which is provided with an insulating support body, and the lower electrode is positioned below the outlet of the capillary tube. According to the chip, the capillary tube is embedded into the micro-fluidic chip, so that an accurate fixing effect is achieved, the structure is simplified, and full-automatic loading of a sample can be realized.