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Design and Experiment of Triangular Prism Mast with Tape-Spring Hyperelastic Hinges

Chinese Journal of Mechanical Engineering 2018年第2期31卷 35-44页

作者： Hui Yang hong-Wei guo Yan Wang Rong-qiang Liu Meng Li College of Electrical Engineering and Automation Anhui University China State Key Laboratory of Robotics and System Harbin Institute of Technology China Electronics Technology Group Corporation No.38 Research Qian Xuesen Laboratory of Space Technology China Academy of Space Technology

Because of the limited space of the launch rockets, deployable mechanisms are always used to solve the phenomenon. One dimensional deployable mast can deploy and support antenna, solar sail and space optical camera. Tape-spring hyperelastic hinges can be folded and extended into a rod like configuration. It utilizes the strain energy to realize self-deploying and drive the other structures. One kind of triangular prism mast with tape-spring hyperelastic hinges is proposed and developed. Stretching and compression stiffness theoretical model are established with considering the tape-spring hyperelastic hinges based on static theory. The finite element model of ten-module triangular prism mast is set up by ABAQUS with the tape-spring hyperelastic hinge and parameter study is performed to investigate the influence of thickness, section angle and radius. Two-module TPM is processed and tested the compression stiffness by the laser displacement sensor, deploying repeat accuracy by the high speed camera, modal shape and fundamental frequency at cantilever position by LMS multi-channel vibration test and analysis system, which are used to verify precision of the theoretical and finite element models of ten-module triangular prism mast with the tape-spring hyperelastic hinges. This research proposes an innovative one dimensional triangular prism with tape-spring hyperelastic hinge which has great application value to the space deployable mechanisms.

关键词： Deployable mechanism Triangular prism mast Tape-spring hyper-elastic hinges Static analysis Modal experiment

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Simulation of multi-axis grinding considering runout based on envelope theory

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Chinese Journal of Aeronautics 2020年第12期33卷 3526-3534页

作者： Yan JIANG qiang guo School of Mechanical&Power Engineering Henan Polytechnic UniversityJiaozuo 454150China

As one of the most important methods for machining process with high accuracy,ultra-precision grinding is widely used in fields such as aerospace,automotive and mold,***,it is common that wheel and spindle axis do not coincide with each other due to wheel settings,machining errors and so *** could result in the generation of wheel runout,which may reduce the machining surface's *** this paper,combining this phenomenon,an analytic algorithm method for the multi-axis grinding process is introduced according to the envelope *** that,the accuracy of this method is *** experiments are carried out on a 5-axis machining *** artificial runout is set up and calculated utilizing the least square ***,using the presented method,two examples with and without runout are introduced to illustrate the validation of the proposed *** error due to the runout effect is also analyzed.

关键词： Analytic algorithm Complex surface Envelope theory Multi-axis grinding Wheel runout

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Temporal characteristic analysis of single event effects in pulse width modulator

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Nuclear Science and Techniques 2017年第7期28卷 59-64页

作者： Wen Zhao Xiao-qiang guo Wei Chen Zu-Jun Wang hong-Xia guo Yuan-Ming Wang School of Nuclear Science and Technology Xi'an Jiaotong University State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear Technology

In this paper,the nature and origin of single event effects(SEE) are studied by injecting laser pulses into different circuit blocks,combining with analysis to map pulse width modulators circuitry in the microchip die.A time-domain error-identification method is used in the temporal characteristic analysis of *** signatures of different injection times are *** serious SEE are observed when the laser shot occurs on a rising edge of the device output for blocks of the error amplifier,current sense comparator,and T and SR latches.

关键词：单粒子效应脉宽调制器时间特性误差放大器电路模块激光脉冲时间特征注射次数

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Study on the gamma rays and neutrons energy response optimization of a scintillating fiber detector for EAST with Geant4

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Nuclear Science and Techniques 2023年第9期34卷 40-49页

作者： Wei-Kun Chen Li-Qun Hu guo-qiang Zhong Rui-Jie Zhou Bing hong qiang Li Li Yang Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Institute of Energy Hefei Comprehensive National Science Center(Anhui Energy Laboratory)Hefei 230031China

A new scintillating fiber detector inside magnetic shielding tube was designed and assembled for use in the next round of fusion experiments in the experimental advanced superconducting tokamak to provide D–T neutron yield with time *** this study,Geant4 simulations were used to obtain the pulse height spectra for ideal signals produced when detecting neutrons and gamma rays of multiple *** of the main sources of interference was found to be low-energy neutrons below 10–5 MeV,which can generate numerous secondary particles in the detector components,such as the magnetic shielding tube,leading to high-amplitude output *** address this issue,a compact thermal neutron shield containing a 1-mm Cd layer outside the magnetic shielding tube and a 5-mm inner Pb layer was specifically *** effects on the measurement of fast neutrons and the shielding effect on gamma rays were *** can suppress the height of the signals caused by thermal neutrons to a level below the height corresponding to neutrons above 4 MeV because the yield of the latter is used for detector *** addition,the detector has relatively flat sensitivity curves in the fast neutron region,with the intrinsic detection efficiencies(IDEs)of approximately 40%.For gamma rays with energies that are not too high(<8 MeV),the IDEs of the detector are only approximately 20%,whereas for gamma rays below 1 MeV,the response curve cuts off earlier in the low-energy region,which is beneficial for avoiding counting saturation and signal accumulation.

关键词： Sci-Fi detector D–T fusion neutron Thermal neutron shield Energy response Geant4

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Risk factors, incidence, and morbidity associated with antibioticassociated diarrhea in intensive care unit patients receiving antibiotic monotherapy

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World Journal of Clinical Cases 2020年第10期8卷 1908-1915页

作者： hong Zhou qiang Xu Yu Liu Li-Tao guo Department of Respiratory and Critical Care Medicine The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061Shaanxi ProvinceChina Department of Critical Care Medicine The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061Shaanxi ProvinceChina

BACKGROUND This study aimed to identify factors associated with antibiotic-associated diarrhea(AAD)in patients in the department of intensive care medicine who received antibiotic monotherapy in order to reduce the incidence of AAD and improve rational use of antibiotics in these *** To report the incidence of AAD and the factors associated with AAD in patients receiving antibiotic *** The study used a single-center retrospective design.A total of 209 patients were *** were divided into two groups:No-AAD group(without AAD)and AAD group(with AAD).There were 45 cases in the AAD group and 164 cases in the no-AAD *** data of all patients were *** were analyzed using SPSS(version 18.0),and statistical significance was set at P<*** The overall incidence of AAD was 21.53%.Age[odds ratio(OR)1.022,95%confidence interval(CI):1.001-1.044,P=0.040],proton pump inhibitor usage time(OR 1.129,95%CI:1.020-1.249,P=0.019),antibiotic usage time(OR 1.163,95%CI:1.024-1.320,P=0.020),and intensive care unit(ICU)stay time(OR 1.133,95%CI:1.041-1.234,P=0.004)were associated with AAD in ICU patients receiving antibiotic ***±SD ICU stay time was lower in the no-AAD group(8.49±6.31 vs 15.89±10.69,P<0.001).However,there was no significant difference in ICU-related mortality rates between the two groups(P=0.729).CONCLUSION Older age,longer ICU stay time,duration of use of proton pump inhibitors,and duration of antibiotic increase the incidence of AAD in ICU patients receiving antibiotic monotherapy.

关键词： Diarrhea Intensive care unit Critically ill Mortality Antibiotics Monotherapy

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The Determination of the Protonation Constants of A New Macrocyclic Dinucleating Ligand, BDBPH

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Chinese Chemical Letters 2001年第2期12卷 171-174页

作者： guo qiang SHANGGUAN Ning WANG hong En WANG Arthur EMARTELL Department of Chemistry Jining Medical CollegeJining 272013 Department of Chemistry Texas A&M UniversityCollege StationTexas 77842

The protonation constants of a new dinucleating 24-membered hexaazadiphenol macrocyclic ligand, BDBPH, were determined by potentiometric measurement at 25.0 degreesC and mu = 0.100 mol.L-1 (KCl). The species distributions of the deprotonated and protonated compounds in the pH range from 2 to 12 aqueous solutions were also described.

关键词： Protonation constant potentiometric measurement macrocyclic ligand

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Selective oxidation mediated synthesis of unique SexTey nanotubes, their assembled thin films and photoconductivity

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Nano Research 2018年第2期11卷 665-675页

作者： Yang, Yuan Liu, guo-qiang Gao, Min-Rui Xia, Yu Yu, Shu-hong Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovation Centre of Suzhou Nano Science and Technology CAS Centre for Excellence in Nanoscience Department of Chemistry Hefei Science Centre of CAS University of Science and Technology of China Hefei China

One-dimensional hollow nanostructures have potential applications in many fields and can be fabricated using various methods. Herein, a selective-oxidation route for the synthesis of unique SexTey nanotubes （STNTs） with a controlled morphology using TexSey@Se core-shell nanowires （TSSNWs） as a template is reported. Because of the lower redox potential of TeO2/Te compared to that of H2SeO3/Se, the Te in TSSNWs can be preferentially oxidized by an appropriate oxidant of HNO2 to form STNTs. The inner diameters and wall thicknesses of the STNTs can be tuned by modulating the core diameters and shell thicknesses of the TSSNWs, respectively. The STNTs can be assembled into a monolayer composed of well-arranged nanotubes using the Langmuir-Blodgett technique. A device based on films stacked with 10 STNT monolayers was fabricated to investigate the photocoductivity of the STNTs. The STNTs exhibited a good photoresponse over the whole ultraviolet-visible spectrum, revealing their votential for application in ovtoelectronic devices.

关键词： selective oxidation core-shell nanowires nanotubes assembled thin films photoconductivity

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Numerical simulation on a film-cooled rotating model with 30° injection holes

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航空动力学报 2010年第7期25卷 1443-1453页

作者： YANG Bin XU guo-qiang TAO Zhi DING Shui-ting WU hong-wei National Key Laboratory of Science and Technology on Aero-Engines School of Jet Propulsion Beijing University of Aeronautics and Astronautics Beijing 100191 China

The flow and heat transfer characteristics were numerically investigated on a film cooling model under different rotating operating *** computational model was originated from the mid-span section of a typical turbine rotor with two rows of 14 staggered injection holes angled 30° both on the suction surface and pressure surface,and the flow through the coolant plenum and all the hole-pipes were resolved as a part of the computational domain by specifying the coolant mass flux in the *** computations primarily focus on under-standing the rotational effect on film cooling performance in mechanism research *** the present study,the Reynolds number(Re) based on mainstream velocity and injection hole diameter varied from 1835.5 to 5507.4,and the averaged blowing ratio(M) ranges of 0.5 to *** show that the coolant will move on to the high-radius locations near the suction and pressure surfaces due to the strong centrifugal effect,which leads to the decrease in adiabatic effectiveness *** discharge coefficients(Cd),on the pressure surface,are much higher than that on the suction surface under a given operating *** addition,the critical values of angular speed which represent the equilibrium of centrifugal force and Coriolis force near the pressure surface are also presented.

关键词： film cooling rotating adiabatic effectiveness heat transfer discharge coefficient

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MFSR: Maximum Feature Score Region-based Captions Locating in News Video Images

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International Journal of Automation and computing 2018年第4期15卷 454-461页

作者： Zhi-Heng Wang Chao guo hong-Min Liu Zhan-qiang Huo School of Computer Science and Technology Henan Polytechnic University

For news video images, caption recognizing is a useful and important step for content understanding. Caption locating is usually the first step of caption recognizing and this paper proposes a simple but effective caption locating algorithm called maximum feature score region （MFSR） based method, which mainly consists of two stages： In the first stage, up/down boundaries are attained by turning to edge map projection. Then, maximum feature score region is defined and left/right boundaries are achieved by utilizing MFSR. Experiments show that the proposed MFSR based method has superior and robust performance on news video images of different types.

关键词： News video images captions recognizing captions locating content understanding maximum feature score region(MFSR).

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Development of a wide-range and fast-response digitizing pulse signal acquisition and processing system for neutron flux monitoring on EAST

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Nuclear Science and Techniques 2022年第3期33卷 126-136页

作者： Li Yang hong-Rui Cao Jin-Long Zhao Zi-Han Zhang qiang Li guo-Bin Wu Yong-qiang Zhang guo-qiang Zhong Li-Qun Hu Zi-Jun Zhang Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Hefei University of Technology Hefei 230009China

The neutron count rate fluctuation reaches six orders of magnitude between the ohmic plasma scenario and high power of auxiliary heating on an experimental advanced superconducting tokamak(EAST).The measurement result of neutron flux monitoring(NFM)is a significant feedback parameter related to the acquisition of radiation protection-related information and rapid fluctuations in neutron emission induced by plasma magnetohydrodynamic ***,a wide range and high time resolution are required for the NFM system on *** satisfy these requirements,a digital pulse signal acquisition and processing system with a wide dynamic range and fast response time was *** present study was conducted using a field-programmable gate array(FPGA)and peripheral component interconnect extension for instrument express(PXIe)*** digital dual measurement modes,which are composed of the pulse-counting mode and AC coupled square integral's Campbelling mode,were designed to expand the measurement range of the signal acquisition and processing *** time resolution of the signal acquisition and processing system was improved from 10 to 1 ms owing to utilizing highspeed analog-to-digital converters(ADCs),a high-speed PXIe communication with a direct memory access(DMA)mode,and online data preprocessing technology of *** signal acquisition and processing system was tested experimentally in the EAST radiation *** test results showed that the time resolution of NFM was improved to 1 ms,and the dynamic range of the neutron counts rate was expanded to more than 10^(6) counts per *** Campbelling mode was calibrated using a multipoint average linear fitting method;subsequently,the fitting coefficient reached ***,the newly developed pulse signal acquisition and processing system ensures that the NFM system meets the requirements of high-parameter experiments conducted on EAST more effectively.

关键词： EAST Neutron flux monitoring High time resolution Wide range Pulse signal acquisition and processing system

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