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68results about How to "Meet efficiency requirements" patented technology

Solar battery slice technology for efficient and low-cost film crystal silicon

The present invention is a technique for manufacturing a crystalline silicon solar cell piece, especially a technique for manufacturing a high-efficiency, low cost and thin-sheet solar cell piece, and the invention belongs to the solar energy application field. The technique aims at the thin-sheet crystal silicon chip with thickness less than 200 mu m, by adopting innovated technique and developing the original technique, combines the domestic cell whole equipment which is independently developed, settles the contradiction between the thin sheet and the fraction ratio, finished product rate and the electrical property, and satisfies the request of the cell piece product line to the high efficiency and low cost. The technique for manufacturing crystal silicon solar cell piece is subdivided to seven steps according to the process flow: eliminating the injury and coarsen the surface, diffusing to make a knot, plasma etching for eliminating the edge, PSG eliminating, PECVD depositing Si3N4 film, printing positive back electrode slurry and back field slurry on the silk screen, and co-baking to form an ohm contact. When the technique is adopted for the size 125*125mm<2>, the efficiency of the single crystalline silicon solar cell piece is up to 16.5, and the efficiency of the polycrystalline silicon solar cell is up to 15.0%.
Owner:BEIJING ZHONGKEXIN ELECTRONICS EQUIP

Method for recognizing iris based on edge gradient direction pyramid histogram

The invention discloses a method for recognizing an iris based on an edge gradient direction pyramid histogram and belongs to the technical field of computer image processing. The method comprises the following steps of: performing denoising and gray correction on a normalized iris image based on an iris sample image and an iris image to be recognized; extracting edge pixel points and reserving strong edge points by using sobel operators in the horizontal direction and vertical direction; dividing the edge points into eight types according to the gradient directions of the edge points; mapping an edge graph into a multi-resolution multi-dimensional histogram set; calculating correlation quantity of two histogram sets of the iris sample image and the iris image to be recognized according to a pyramid matching kernel formula so as to acquire similarity of the two iris images; and finally, judging whether the iris image to be recognized is consistent with the iris sample image according to a similarity threshold. By the method, an ideal recognition rate can be acquired, and operation time of characteristic extraction and recognition is greatly reduced; and the method has great significance for embedded application of iris recognition.
Owner:厚普清洁能源(集团)股份有限公司

Full-automatic quality detection device of micro drill point for drilling PCB

InactiveCN101706256AReal-time precise axial positioning heightGuaranteed stabilityUsing optical meansImaging qualityEngineering
The invention relates to a full-automatic quality detection device of a micro drill point for drilling a PCB in the technical field of tool detection, which comprises a feeding mechanism, a rotary worktable, a micro drill rotary mechanism, a height adjusting mechanism, a vision detection device and a discharging mechanism, wherein the feeding mechanism, the rotary worktable and the discharging mechanism are respectively and correspondingly arranged at a feeding station, a rotary station and a discharging station of a working platform, the micro drill rotary mechanism and the height adjusting mechanism are sequentially arranged at the side face of the rotary table, the vision detection device is arranged at a vision detection station of the working platform, the feeding station and the rotary station are arranged at the same side, the discharging station and the feeding station are positioned at two ends of the working platform, and the vision detection station and the discharging station are positioned at the same side. The micro drill rotary mechanism and the height adjusting mechanism can enable a micro drill to simultaneously realize the circumferential rotation and the axial real-time precise adjustment, can fine adjust the axial positioning height of the micro drill in real time, and ensure the imaging quality of a blade surface and the measurement precision of geometric parameters.
Owner:SHANGHAI JIAO TONG UNIV

Stator double-armature winding air-cored pulse generator and method thereof for realizing pulse discharge

The invention relates to a stator double-armature winding air-cored pulse generator and a method thereof for realizing pulse discharge, belonging to the technical field of strong pulse power source projects and solving the problem that a confliction between the amplitude of discharge current and self-excitation efficiency is caused by the selection of the number of the turns of armature windings in a traditional air-cored compensating pulse generator. An air-cored stator of the generator is provided with a primary armature winding and a secondary armature winding which form a double-armature winding air-cored stator structure. The primary armature winding is used for discharge to loads and the secondary armature winding is used for generating higher back electromotive force to a slotless field winding for realizing self excitation. In the method for realizing the pulse discharge, a primary mover is used for enabling an air-cored rotor of the generator to rotate; a start capacitor Cs is used for providing seed current to the non-slot field winding; the induced electric potential of the secondary armature winding on the air-cored stator is used for providing self-excitation current to the slotless field winding; and the induced electric potential of the primary armature winding is used for discharge to the loads for generating and outputting pulse electric energy. The invention is used as a strong pulse power supply of specific loads.
Owner:HARBIN INST OF TECH

City government hotline data integration platform

The invention relates to a city government hotline data integration platform comprising a unified basic support platform and the service application system of each data source department. The unified basic support platform comprises a basic facility layer, a data resource layer, an application support layer and an application service layer which are arranged from the bottom to the top in turn. The data resource layer acquires the data of all the data source departments. The application support layer performs basic arrangement on the data and acquires the basic data of the data resource layer and then performs the basic service and is used for providing service support to the application service layer. The service application systems establish information interaction channels with the application service layer and realize the application service for the data source departments. Various government affair service hotlines are integrated based on the mayor's open telephone, and the public service hotlines with integration of consulting, service, assistance, supervision and complaint, public opinion analysis and coordinated supervision are established so that various non-urgent appeals of the people put forward to the government apart from urgent alarm are received in a unified way.
Owner:成都丰窝科技有限公司

Method and device for rapidly detecting loosening of bolt of iron tower

The invention relates to the field of iron tower assembly quality detection, in particular to a method and a device for rapidly detecting the loosening of a bolt of an iron tower. An additional vibration source vibrates the iron tower, a loosened bolt and a tower part are excited to resonate or vibrate to produce secondary impact sounds, and sound waves are received and converted into electrical signals through a vibration frequency receiving device. Two methods are used for analyzing the electrical signals, wherein one method comprises the steps of displaying sound waveforms and performing waveform analysis by observing the waveforms, and the other method comprises the steps of performing counting and analyzing a count value, so that whether a certain bolt on the iron tower is loosened or not can be rapidly judged. Compared with the prior art, the method and the device have the beneficial effects that a sound wave detection technology is adopted for rapid detection after the assembly of the iron tower; the method and the device have the advantages of high detection speed, capability of greatly saving manpower and material resources and no requirements on tower climbing for detection; sound wave data can be analyzed to directly reflect whether the bolt of the iron tower is loosened or not by once comprehensive detection, so that requirements on the detection efficiency and accuracy of the iron tower are met.
Owner:ANSHAN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER COMPANY +2

RSA coprocessor for RFID (radio frequency identification device) intelligent card chip

The invention discloses an RSA coprocessor for an RFID (radio frequency identification device) intelligent card chip. The RSA coprocessor comprises a main control unit for controlling the whole RSA encryption and decryption process, wherein the main control unit is connected with a storing control unit, a preprocessing unit and a modular exponentiation unit respectively through control lines; the modular exponentiation unit is connected with a subtracting processing unit through the control line; the preprocessing unit, the modular exponentiation unit and the subtracting processing unit are connected with a multiplexing logical operation unit; a storing control unit is connected with the preprocessing unit, the modular exponentiation unit and the subtracting processing unit, and connected to an intelligent card CPU (Central Processing Unit) through an external interface. The RSA coprocessor disclosed by the invention greatly improves the data processing efficiency, releases the data processing pressure of the intelligent card CPU, and meets the requirements on the efficiency and the stability of the encryption and decryption algorithm of the intelligent card chip RSA.
Owner:广州南菱汽车股份有限公司

Ship floating state and stability monitoring device and method for container quay crane

The invention relates to a ship floating state and stability monitoring device and method for a container quay crane. According to information, such as quay tide level and wave conditions, mooring constraints, loading and unloading operation, a ship-type structure, a hanger position, sling tightness, and a hanger inclination angle, obtained through a quay operation management system and a quay crane monitoring computer, a natural period and a steady-state inclination angle are predicted through a ship rolling non-mooring constraint extreme point measurement method, a ship static inclination angle and initial stability safety are calculated and verified, and floating state and stability alarming in the ship loading and unloading processes is conducted; the problems of a small container shipwhich is not equipped with a loader, cannot provide carrying information, and is difficult to accurately verify the initial stability are solved, thus the crew testing work intensity is reduced, andthe ship loading stability safety is ensured; the disadvantage that a rolling period test method needs to remove ship mooring and measures the complete period is overcame, free rolling generated by loading and unloading operation in a quay is effectively used, the measurement time of a hanger loaded on the ship is greatly shortened, and the efficiency requirements of quay crane loading and unloading operation are basically met; and immediate data reference is provided for timely stowage or ballast adjustment of the quay and the ship, and the ship floating state and stability monitoring deviceand method for the container quay crane can be widely applied to various container quay cranes of manual or automated quays.
Owner:UNIV OF SHANGHAI FOR SCI & TECH +1

Leather performance index testing instrument

The invention relates to a leather performance index testing instrument. The leather performance index testing instrument comprises a stepping motor, a speed reducer, a translation block, a lead screw, a shaft coupler, a clamping device, a testing head, a worktable, a displacement sensor and a pressure sensor, wherein the clamping device is fixedly connected on a bottom plate of a rack by the worktable; the testing head is arranged on the clamping device; the pressure sensor is arranged at the upper end of the testing head and is arranged on the translation block by a pressure sensor mounting table; the translation block is in transmission connection with a stepping motor fixed at the upper end of the rack by the lead screw and the shaft coupler; the side of the translation block is fixedly connected with a reading head; the displacement sensor corresponding to the reading head is arranged on the side surface of the rack; and the stepping motor, the pressure sensor, the displacement sensor and the reading head are connected with a control system. The leather performance index testing instrument has a simple structure and is flexible to use; the reliability of a leather performance index test is guaranteed, an on-line test of the leather performance index is realized, and the requirements on a specific test also can be met, the high-efficiency requireemnts on industrial production furtehr can be met and requireemnts of the industrial production can be met.
Owner:SHANGHAI INST OF TECH

Information fusion method and system of multi-sensor system, computer device and medium

The invention discloses an information fusion method and system of a multi-sensor system, a computer device and a medium. A specific embodiment of the method comprises the steps of dividing a signal time length into a plurality of time windows, and obtaining a target sensor of a current time window; dividing the current time window into at least two sub-windows, judging whether the target sensor has a fault in the current time window or not according to the sum of the observation residual statistical property values of the target sensor at all moments in the current time window and a window preset chi-square distribution threshold; if yes, according to the time sequence of the sub-windows, judging the sub-windows where the faults of the preset chi-square distribution threshold values of the corresponding sub-windows are located sequentially according to the sum values in the sub-windows and the time sequence of the sub-windows, and judging the time when the faults occur moment by moment according to the characteristic values of all the moments in the sub-windows and the time preset chi-square distribution threshold values; and obtaining an information fusion result of the target sensor at the end moment of the current time window according to the fault condition of the target sensor in the current time window.
Owner:BOE TECH GRP CO LTD +1

Wireless power transmission system power efficiency optimization method based on matching efficiency set element exhaustion method

The invention discloses a wireless power transmission system power efficiency optimization method based on a matching efficiency set element exhaustion method. The method comprises the implementation of joint optimization of the power and the efficiency under the wireless power transmission efficiency matching state. Aiming at the wireless power transmission system which requires a medium transmission distance and has unchangeable emitting side and receiving side, the invention firstly provides a method for dynamically changing a position of a relay coil and the turns of the coil to implement the condition that the system can product a plurality of matching efficiency points and power points corresponding to the matching efficiency points when a load with a fixed size is connected to the system; and secondly adopts the exhaustion method to select appropriate power and efficiency point as the working point of the system among the plurality of produced matching efficiency points and the corresponding power points. The method has the characteristics that the requirement of the system for the efficiency is first satisfied, and the required transmission efficiency must be higher than 50%, and then the efficiency and the power are optimized on the basis of the abovementioned conditions.
Owner:SOUTHEAST UNIV
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