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Now showing items 1 - 16 of 414

  • MULTI-LEGGED ROBOT GAIT CONTROL METHOD AND APPARATUS, AND ROBOT

    Provided is a multi-legged robot gait control method, comprising: dividing each gait of a robot into a plurality of action units having a pre-set order, acquiring a foot end motion trajectory of the robot and a target zero moment point corresponding thereto; where the robot is walking with a pre-set gait, according to a current zero moment point acquired in real time and the target zero moment point, obtaining a centre of mass motion trajectory of the robot; according to the foot end motion trajectory and the centre of mass motion trajectory, determining trajectory information about a component connection point of the robot; and controlling the robot to move in the order of the action units in a pre-set gait and according to the trajectory information about the component connection points corresponding to the action units. The method above solves the problem of using an offline design to plan the travel of a bi-legged robot, which causes poor anti-interference performance, and realizes the technical effect of real-time planning of a robot gait. Further provided are a multi-legged robot gait control apparatus, and a robot.
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  • An equivalent lumped circuit model for on-chip helical transformers

    Zou, Wanghui   Hu, Jin   Chen, Diping   Zeng, Yun  

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  • SARCOSINE DETECTION DEVICE, PREPARATION METHOD THEREFOR AND USE THEREOF

    A sarcosine detection device, a preparation method therefor and use thereof. The sarcosine detection device comprises an organic electrochemical transistor (10) and a gate electrode (20) on which a sarcosine oxidase (21) is immobilized. When a chemical reaction between a sarcosine to be detected and the sarcosine oxidase (21) on the gate electrode (20) occurs, the interfacial potential of the gate electrode (20) will change, and the sarcosine concentration can finally be detected by measuring the change in the channel current of the organic electrochemical transistor (10). The organic electrochemical transistor (10) in the detection device has the functions of sensing and signal amplification, and has a very high sensitivity and a very low detection limit during sarcosine detection. The sarcosine detection device has advantages of simple structure, low production cost and low working voltage, and being able to achieve detection in a portable manner.
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  • Quantum oscillation evidence for a topological semimetal phase in ZrSnTe

    Hu, Jin   Zhu, Yanglin   Gui, Xin   Graf, David   Tang, Zhijie   Xie, Weiwei   Mao, Zhiqiang  

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  • Evidence of Topological Nodal-Line Fermions in ZrSiSe and ZrSiTe

    Hu, Jin   Tang, Zhijie   Liu, Jinyu   Liu, Xue   Zhu, Yanglin   Graf, David   Myhro, Kevin   Tran, Son   Lau, Chun Ning   Wei, Jiang   Mao, Zhiqiang  

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  • A LENS AND AN ILLUMINATING DEVICE EQUIPPED WITH THE LENS

    The present invention relates to a lens for a linear light source (L), comprising an outer surface facing away the light source (L) and an inner surface facing to the light source (L), wherein the outer surface is a planar emergent surface (F) and the inner surface comprises a first convex region (1) and second concave regions (2), symmetrical with respect to the first convex region (1), wherein respective second concave region (2) has a microstructure, through which light from the light source (L) is refracted and further reflected to the emergent surface (F). In addition, the present invention further relates to an illuminating device equipped with the lens. The lens according to the present invention has a small thickness and can totally refract and internally reflect light of different incident angles so as to create an elongated uniform light distribution pattern.
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  • New DC Grid Power Line Communication Technology Used in Networked LED Driver

    Lin, Huipin   Hu, Jin   Zhou, Xiao   Lu, Zhengyu   Wang, Lujun  

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  • CARBONATE PRECURSORS FOR HIGH LITHIUM AND MANGANESE CONTAINING CATHODE MATERIALS

    A carbonate precursor compound of a lithium manganese based oxide powder for a positive electrode of a rechargeable battery, the oxide having the general formula Li1+vM1-vO2, wherein -0.03≤v≤0.25, wherein M is a composition comprising at least 50mol% of manganese, and wherein the carbonate precursor compound has a secondary particle size D50 expressed in µm, and a tap density TD expressed in g/cm3, with either ≤ TD ≤ (2.78*D50)/(D50+7.23) and the compound having a particle size distribution having a span S≤1.8 with S=(D90-D10)/D50; or 1 ≤ TD ≤ (2.78*D50)/(D50+7.50).
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  • REFLECTION-TYPE LIGHT-SPLITTING GRATING AND INTERFERENCE PHOTOETCHING SYSTEM

    A reflection-type light-splitting grating and an interference photoetching system. The reflection-type light-splitting grating (1) comprises a grating groove-shaped region (11) located on a reflection plane (10) and a light blocking region (12) located on the periphery of the grating groove-shaped region (11), wherein the grating groove-shape region (11) comprises a grating structure (110) periodically distributed. The grating structure (110) is provided with a groove-shaped reflection plane (111) and a non-reflection region (112), and an oblique angle is formed between the groove-shaped reflection plane (111) and a grating basal plane. The reflection-type light-splitting grating (1) can realize the maximum modulation on light of ± 1 level, so that the beam splitting light reflected out has the highest energy utilization rate. An interference pattern obtained via the reflection-type light-splitting grating (1) has good boundary quality, so that precise pattern splicing can be conducted, thereby promoting the large-breadth interference photoetching technique.
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  • NONINVASIVE BLOOD GLUCOSE MEASUREMENT TEST STRIP AND MANUFACTURING METHOD THEREFOR

    A noninvasive blood glucose measurement test strip and a manufacturing method therefor. The noninvasive blood glucose measurement test strip comprises: a test strip substrate (1); a first electrode (2), a second electrode (3), and a third electrode (4) provided on the test strip substrate (1); an organic semiconductor thin film material (5) provided on the test strip substrate (1) and connected with the first electrode (2) and the second electrode (3); glucose oxidase (6) fixed on the third electrode (4); and an insulating cover sheet (7) covering the test strip substrate (1). The insulating cover sheet (7) is provided with an open slot (71) for dropping a fluid to be tested. The organic semiconductor thin film material (5) and the glucose oxidase (6) are both exposed in the open slot (71). A blood glucose measurement test strip is made based on a thin film transistor for the first time to achieve measurement of low-concentration glucose in a body fluid, such as saliva, urine, sweat, and interstitial fluid. The noninvasive blood glucose measurement test strip has extremely high measurement sensitivity and extremely low measurement limit, and can truly achieve noninvasive blood glucose measurement.
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  • TRANSMISSION-TYPE LIGHT-SPLITTING GRATING AND INTERFERENCE PHOTOETCHING SYSTEM

    A transmission-type light-splitting grating and an interference photoetching system. The transmission-type light-splitting grating (1) comprises a grating groove-shaped region (11) located on an incident plane (10) and a light blocking region (12) located on the periphery of the grating groove-shaped region (11), wherein the grating groove-shaped region (11) comprises a stepped grating structure (110), and the stepped grating structure (110) is provided with a transmission step plane (111) and a non-transmission region (112). The transmission-type light-splitting grating (1) can realize the maximum modulation on light of ± 1 level, so that the beam splitting light transmitted out has the highest energy utilization rate. An interference pattern obtained via the transmission-type light-splitting grating (1) has good boundary quality, so that precise pattern splicing can be completed, thereby significantly promoting the large-breadth interference photoetching technique.
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  • The Stability of a Rock Dam Site under Seismic Conditions

    Hu, Jin   Yang, Xue Zhi   Zhang, Yong   Zhong, Jun Ye  

    This paper takes the Daliushu Dam Site in Yellow River as an example, which is located near the active fault zone with high seismic intensity. It studies the seepage of dam abutment rock mass in meizoseismal area and the stability under earthquake condition. The assessments on the key engineering problems of this project are based upon a large number of investigations, in-situ and laboratory tests, etc., which are carried out in the field by the author. We know that the "5∙12" Wenchuan Earthquake in 2008 triggered strong ruptures and damages of massif, and destructed the concrete facing of the Zipinpu rock-fill dam in Minjiang River, which is very close to the earthquake source and sufferd a 0.56g' seismic acceleration. For this reason, this paper analyzes the possible damage on the Daliushu Dam site rock mass under the grouting in the future earthquake, returning to the present poor quality condition of rock mass, while this dam shares the seismic intensity, seismic acceleration, dam type and dam height similar to the Zipinpu Project. This paper puts forward a new research thought, which is the longtime -lasting strong earthquake,first causes the rupture of rock mass and the decrease of rock mass mechani cal parameters, and the lasting earthquake will then worsen the rock mass structure mechanics parameters, and even cause the large-scale massif damage. From this viewpoint, this paper, analyzes the stability of the dam foundation and abutment rock mass especially the stability of the thin massif of the right dam abutment by the numerical analysis. The analysis show that under the normal and the earthquake conditions (excluding the rock mass damage and mechanical parameters decrese resulted from the lasting earthquake), The Daliushu Dam Site and the right dam abutment are still stable when the safety factor is assumed to be 0.802 under the lasting earthquake. In addition, the calculation results show that the stability is not enough.
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  • Main Points about Blasting Demolition of a Building at Lin\"an

    Hu, Jin   Xin, Zhen Kun   Liu, Gui Chun   Tang, Xiao Ping  

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  • PROTON EXCHANGE MEMBRANE FOR USE IN PROTON EXCHANGE MEMBRANE FUEL CELLS

    The present invention relates to proton exchange membranes for use in proton exchange membrane fuel cells, in particular in high temperature polymer electrolyte membrane fuel cells (PEMFC) and direct methanol fuel cells (DMFC), comprising sulfonated polybenzimidazole polymers; and to methods for the production of such proton exchange membranes. The invention further relates to novel sulfonated polybenzimidazole polymers and their use as a component of a proton exchange membrane in proton exchange membrane fuel cells. Moreover, the present invention relates to proton exchange membrane fuel cells, comprising such proton exchange membranes.
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  • The Deep Etching Process Based on Parallel Laser Direct Writing System

    Hu, Jin   Pu, D.L.   Chen, Lin Sen  

    Due to the high cost-effectiveness, extra flexibility, and short production cycle, laser direct writing system as a kind of maskless lithography technology has been widely used in the fields of micro-nano-manufacturing. The working principle of the parallel laser direct writing system based on DMD(Digital Micromirror Device) is introduced. A novel negative photoresist - dry film photoresist is adopted into the study of deep etching for the fabrication of the micro mold. The experimental results show that: the whole process is convenient, efficient and flexible; the precision of the 2-D patterning and the depth of etching is reliable.
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  • Bending Solid Elastic Waves with Arbitrary Angles by Bricks

    Hu, Jin   Lu, Xiang Yang  

    Transformation method provides an efficient way to control wave propagation by materials. Recently, this method has been extended to control elastic waves in solids in case of high frequency or small material gradient. An important device in practice, elastodynamic beam bender with isotropic materials, can be designed by this method. In this paper, we will explore some characteristics of the isotropic elastodynamic beam bender and show that it can be used as bricks to guide the solid elastic beam to arbitrary angles, providing more flexibility in engineering practices. Examples are conceived and validated by numerical simulations.
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