Jingfeng
Jingfeng Li, Shenzhen City CN
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20140033881 | Spanner Tool - Disclosed is a spanner tool for mounting or dismounting components, which comprises a control piece ( | 02-06-2014 |
Jingfeng Li, Redmond, WA US
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20140172821 | GENERATING FILTERS FOR REFINING SEARCH RESULTS - Filters are generated by analyzing a set of search results most relevant to a search query to determine filter values that may be of most interest to the user. A search query is received and is classified into a query segment that best corresponds to the search query so that filter categories associated with the query segment can be identified. Based on an analysis of search results most relevant to the search query, metadata associated with these search results is used to formulate filter values for each filter category. The filter values are ordered based on their respective frequency of presence in the search results. The search results, along with the filter categories and filter values, are communicated for presentation. | 06-19-2014 |
Jingfeng Liu, Zhangjiagang CN
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20150369628 | MAGNETIC ABSOLUTE ROTARY ENCODER - Provided is a magnetic absolute rotary encoder, comprising a rotation shaft, multiple rotating wheels that can rotate along the rotation shaft, multiple encoding units that correspond to the multiple rotating wheels one-to-one, and one or more permanent magnet assemblies that provide the magnetic bias to the multiple encoding units. Each encoding unit comprises a magnetically permeable encoder disc, the structure thereof enabling the magnetic permeability thereof to be different according to the different positions of the rotation shaft, and comprises multiple sensor units that comprise multiple magnetic sensors. The sensor units are used to sense the magnetic permeability of the magnetically permeable encoder disc and to output the sensor signals that characterize the relative position of the magnetically permeable encoder disc. According to the sensor signals of the sensor units, each encoding unit outputs the value that characterizes the selected rotation position of the corresponding rotation wheel, thereby enabling an absolute magnetic rotating encoder that is simple and low in cost and has more precise magnetic encoder discs. | 12-24-2015 |
Jingfeng Wang, Shenzhen CN
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20090059802 | DEVICE, SYSTEM AND METHOD FOR DIAGNOSING INTERWORKING FAULT OF X DIGITAL SUBSCRIBER LINE TRANSCEIVERS - A device, system and method for diagnosing an interworking fault of x Digital Subscriber Line (xDSL) transceivers are disclosed. The xDSL transceivers in the system include an xTU-C and an xTU-R. The system further includes: a message collection module adapted to collect and save the interaction messages transmitted between the xTU-C and the xTU-R during the activation of an xDSL line; and a fault analysis module adapted to analyze the collected interaction messages to obtain the first diagnosis conclusion with respect to the interworking fault. | 03-05-2009 |
20090190644 | METHOD AND APPARATUS FOR QUICKLY DIAGNOSING INTER-COMMUNICATION PROBLEM OF DIGITAL SUBSCRIBER LINE TRANSCEIVERS - A method for quickly diagnosing inter-communication problem of digital subscriber line transceivers, which records the interactive messages between central office xDSL terminal unit (xTU-C) and remote xDSL terminal unit (xTU-R), amends specific message of said interactive messages, executes interactive test utilizing amended message, and analyzes the result of said test to confirm the reason of inter-communication problem. The embodiments also provide an apparatus for quickly diagnosing inter-communication problem of digital subscriber line transceivers. The embodiments efficiently resolve the inter-communication problem between xTU-C and xTU-R which are different xDSL transceivers, provide convenience to telecommunication service provider and telecommunication device maintenance personnel, and save the cost. Device maintenance personnel can quickly, efficiently and accurately resolve inter-communication problem of xDSL devices, so as to simplify processing flow, reduce workload and difficulty, save substantive cost, and improve efficiency. | 07-30-2009 |
Jingfeng Wu, Taiyuan City CN
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20140294655 | METHOD AND DEVICE FOR PREPARING A SINTERED Nd-Fe-B PERMANENT MAGNET - The present invention is directed to a method for preparing a permanent magnet, and more specifically, to a method for preparing a high-performance sintered Nd—Fe—B permanent magnet, in order to solve the problems of increased brittleness or high cost present in the permanent magnet prepared by the existing process. A method for preparing a sintered Nd—Fe—B permanent magnet includes the following steps: (1) ingredient calculation and raw material preparation in which calculating ingredients and preparing raw materials according to the ingredient formula of the resultantly sintered Nd—Fe—B permanent magnet in mass fraction, i.e., (Nd | 10-02-2014 |
Jingfeng Xie, Shenzhen CN
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20150263661 | SYSTEM AND METHOD FOR CONTROLLING REGENERATING ENERGY IN AN ADJUSTABLE SPEED DRIVE - A system and method for controlling an adjustable speed drive (ASD) to decelerate an AC load during a generating mode of operation is disclosed. The ASD includes a capacitor and an inverter coupled to a DC link. A current sensor system is coupled to an output of the inverter. The ASD further includes a control system programmed to calculate an energy of the capacitor, generate a reference power using the calculated capacitor energy, and calculate a feedback power from realtime current signals received from the current sensor system. The control system compares the feedback power to the reference power, defines a frequency offset based on the comparison, generates a speed command using the frequency offset, and outputs the speed command to the inverter to maintain a smooth DC link voltage during deceleration. | 09-17-2015 |
Jingfeng Xue, Shenzhen, Guangdong CN
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20160093259 | LIQUID CRYSTAL ARRAY SUBSTRATE AND ELECTRONIC DEVICE - A liquid crystal array substrate includes a number of pixels, each pixel includes a main region, a first sub-region, and a second sub-region. The main region includes a first thin film transistor (TFT), the first sub-region comprises a second TFT, and the second sub-region comprises a third TFT. Gates of the first TFT, the second TFT, and the third TFT of each pixel are connected to a first scan line, a source of the first TFT is connected to a first data line, a drain of the first TFT is connected to one corresponding pixel electrode; sources of the second TFT and the third TFT are connected to a second data line, drains of the second TFT and the third TFT are respectively connected to corresponding pixel electrodes. | 03-31-2016 |
Jingfeng Yang, Hamilton CA
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20140158189 | AREAL CURRENT MATCHING OF TANDEM SOLAR CELLS - A tandem solar cell includes a bottom solar cell having an energy bandgap with E | 06-12-2014 |
20150303343 | BUILT-IN VERTICAL DOPING STRUCTURES FOR THE MONOLITHIC INTEGRATION OF TUNNEL JUNCTIONS IN PHOTOVOLTAIC STRUCTURES - Photovoltaic semiconductor structures, photovoltaic base structures for forming tandem photovoltaic cells, and methods of fabrication thereof, are provided, in which at least one tunnel junction layer is integrally formed within a semiconductor substrate via a shallow diffusion doping process. In some embodiments, two tunnel junction layers are formed within a common semiconductor substrate having a photovoltaic homojunction therein, such as silicon or germanium, via a two-step shallow diffusion doping process. In other embodiments, a first tunnel junction layer is formed within a semiconductor substrate having a photovoltaic homojunction via a shallow diffusion doping process, while a second tunnel junction layer is formed by an epitaxial or other additive process. In other embodiments, photovoltaic semiconductor structures are provided having an emitter layer and a first tunnel junction layer formed as a composite layer having a graded profile within a semiconductor substrate. | 10-22-2015 |
Jingfeng Yang, Beijing CN
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20120299608 | METHOD OF TESTING RELIABILITY OF SEMICONDUCTOR DEVICE - The invention provides a method of testing reliability of a semiconductor device, wherein the semiconductor device has negative bias temperature instability NBTI. The method comprises steps of: measuring a NBTI curve of a first set of semiconductor devices; measuring 1/f noise power spectrum density and drain current at a predetermined frequency for the first set of the semiconductor devices, under a condition that the first set of the semiconductor devices are biased at a gate electric field; measuring an equivalent oxide thickness EOT of gate dielectric of the first set of the semiconductor devices; measuring 1/f noise power spectrum density and drain current at the predetermined frequency for a second set of semiconductor devices, under a condition that the second set of the semiconductor devices are biased at the gate electric field; measuring an EOT of gate dielectric of the second set of the semiconductor devices; and evaluating a degradation characteristic of the second set of the semiconductor devices by using the NBTI curve of a first set of the semiconductor devices. The method saves the time required for testing the reliability of a large numbers of semiconductor devices, and will not cause damages to the second set of semiconductor devices. | 11-29-2012 |
Jingfeng Zeng, Qingdao CN
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20160047076 | MUSIC WASHING MACHINE AND CONTROL METHOD THEREOF - A music washing machine and a control method thereof. The washing machine includes a motor for introducing a washing water flow. The motor is connected to a control device for performing mutual conversion between a rotation and stopping ratio and/or the rotation speed of the motor and a musical characteristic signal, so that the music emitted by an output device synchronizes with the rotation and stopping ratio and/or the rotation speed of the motor during working of the washing machine. By a conversion device of the washing machine, mutual conversion between the rotation and stopping ratio and/or the rotation speed of the motor of the washing machine and the musical characteristic signal is performed, so that the output device emits music corresponding to the rotation and stopping ratio and/or the rotation speed of the motor during working of the washing machine. | 02-18-2016 |
Jingfeng Zhao, Beijing CN
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20140156212 | METHOD AND APPARATUS FOR TESTING THE EXCITATION CHARACTERISTIC OF CURRENT TRANSFORMER - This disclosure relates to the field of current transformers, for testing the excitation characteristic of a current transformer is disclosed. The method comprise applying alternately positive and negative DC voltages across terminals of secondary winding of a CT to be tested and acquiring a secondary current; constructing a mathematical model of the relationship between the secondary current and a root mean square (rms) equivalent voltage at rated frequency of the CT from the relationship between a magnetic flux of a secondary winding iron-core of the CT and the rms equivalent voltage; and generating an excitation characteristic curve according to the mathematical model. The method and apparatus of the embodiments may test CTs requiring lower testing voltage as well as CTs with knee-point up to tens of kV by supplying a relatively low voltage and power, which makes the embodiments widely applicable. | 06-05-2014 |