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Aerospace China 2016年第3期17卷 44-47页

作者： xiong ke State key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace Enigeering Nanjing University of Aeronauticsand Astronautics

·***,could you please give us a brief introduction to SKLMCMS？Director xiong ke：The State key Laboratory of Mechanics and Control of Mechanical Structures（SKLMCMS）was established with the approval of the Ministry of Science and Technology of the People’s Republic of China in October *** laboratory is located at Nanjing University of Aeronautics and Astronautics（NUAA）.

关键词： Director Frontier please approval aircraft Nanjing brief innovative disciplines astronautics

Association of polymorphisms in glutathione S-transferase genes （GSTM1, GSTT1, GSTP1） with idiopathic azoospermia or oligospermia in Sichuan, China

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Asian Journal of Andrology 2015年第3期17卷 481-486页

作者： Da-ke xiong key Laboratory of Bio-Resources and Eco-Environment Ministry of Education School of Life Science Institute of Medical Genetics Sichuan University Chengdu China Bio-resource Research and Utilization Joint key Laboratory of Sichuan and Chongqing Chengdu China Biotechnology Academy of Nanchuan Chongqing China

The reported effects of the glutathione S-transferase （GSTs） genes （GSTM1, GSTTI, and GSTP1） on male factor infertility have been inconsistent and even contradictory. Here, we conducted a case-control study to investigate the association between functionally important polymorphisms in GST genes and idiopathic male infertility. The study group consisted of 361 men with idiopathic azoospermia, 118 men with idiopathic oligospermia, and 234 age-matched healthy fertile male controls. Genomic DNA was extracted from the peripheral blood, and analyzed by polymerase chain reaction and restriction fragment length polymorphism analysis. There was a significant association between the GSTP1 variant genotype （lle/Val ＋ Val/Val） with idiopathic infertility risk （odds ratio [OR]： 1.53; 95% confidence interval [CI]： 1.11-2.11; P = 0.009）. Similarly, a higher risk of infertility was noted in individuals carrying a genotype combination of GSTTI-null and GSTP1 （lle/Val ＋ ValNal）（OR： 2.17; 95% Cl： 1.43-3.31; P = 0.0002）. These results suggest an increased risk of the GSTPI variant genotype （lle/Val ＋ Val/Val） for developing male factor infertility. Our findings also underrate the significance of the effect of GSTM1 and/or GSTT1 （especially the former） in modulating the risk of male infertility in males from Sichuan, southwest China.

关键词： genetic polymorphism glutathione S-transferase idiopathic infertility male factor

Application and Validation of a Multi-block Constitutive Model at Landslides of the Wenchuan Earthquake

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工程科学与技术 2018年第3期50卷 33-45页

作者： STAMATOPOULOS Constantine xiong ke DI Baofeng Stamatopoulos and Associates Limited Liability Company 5 Isavron Street Athens 114-71 Greece &Hellenic Open University Parodos Aristotelous 18 Patra 26335 Greece Institute for Disaster Management and Reconstruction Sichuan University Chengd

A multi-block model and a corresponding computer program have been developed which predict the kinematics of ***,a unique event for studying different models simulating the triggering and movement of landslides is the 2008Wenchuan earthquake in the mountainous region in Sichuan Province of China,which caused a large number of rapid *** purpose of the paper is two-fold:(a)to propose and incorporate into the multi-block model constitutive relations predicting soil response along slip surfaces,and(b)to apply the multi-block model with the constitutive relations at landslides triggered by the Wenchuan *** proposed constitutive equations predict the shape of the shear stress-displacement response measured in ring shear *** the application,four landslides caused by the Wenchuan earthquake were *** in one of these landslides the shear resistance-displacement response along the slip surface has been measured in laboratory *** this landslide,the triggering and movement of the landslide was *** the other landslides,back analyses were performed and it was observed that the multi-block model predicted reasonably well the final configuration of all *** addition,as the measured and back-estimated total friction angle of all landslides was less than 180,and the materials along the slip surface were sandy,it is inferred that some,or all of the slip surface during these slides was sheared in an undrained manner and excess pore pressures generated during sliding played a key role in the triggering and movement of these ***,the paper(A)proposed and validated a multi-block constitutive model which can be applied to predict the triggering and movement of earthquake-induced slides and(B)by analyzing four landslides of the 2008 Wenchuan earthquake,it concludes that some,or all of the slip surface during these slides,was sheared in an undrained manner and excess pore pressures generated during s

关键词： Wenchuan earthquake multi-block model seismic displacement landslides back analysis strain softening

Fault Tolerant Control Scheme Design for Formation Flight Control System of Multiple Unmanned Aerial Vehicles

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第4期35卷 693-701页

作者： Qian Moshu xiong ke College of Electrical Engineering and Control Science Nanjing Tech University State key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics

The command tracking problem of formation flight control system(FFCS)for multiple unmanned aerial vehicles(UAVs)with sensor faults is *** the objective of the addressed control problem is to design a robust fault tolerant tracking controller such that,for the disturbances and sensor faults,the closed-loop system is asymptotically stable with a given disturbance attenuation level.A robust fault tolerant tracking control scheme,combining an observer with H∞ performance,is ***,it is proved that the designed controller can guarantee asymptotic stability of FFCS despite sensor ***,a simulation of two UAV formations is employed to demonstrate the effectiveness of the proposed approach.

关键词： formation control fault tolerant control(FTC) unmanned aerial vehicle(UAV) robust control

Study on interface failure of shape memory alloy(SMA)reinforced smart structure with damages

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Acta Mechanica Sinica 2005年第3期21卷 286-293页

作者： Zili Hu ke xiong Xinwei Wang The Aeronautical Science key Laboratory for Smart Materials and Structures Nanjing University of Aeronautics and Astronautics. Nanjing 210016 China

Shape memory alloy （SMA） reinforced smart structure can be used to make structural shape and strength selfadapted and structural damage self-restrained. Although SMA smart structures without damages were extensively studied, researches on SMA smart structures with damages have rarely been reported thus far. In this paper, thermo-mechanical behaviors of SMA fiber reinforced smart structures with damages are analyzed through a shear lag model and the variational principle, Mathematical expressions of the meso-displacement field and the stress-strain field of a typical element with damages are obtained, and a failure criterion for interface failure between SMA fibers and matrix is established, which is applied to an example. Results presented herein may provide a theoretical foundation for further studies on integrity of SMA smart structures.

关键词： Smart structures Damages SMA Failure Meso-mechanics analysis Variational principle

Medium Access Control： A Physical Layer Network- Coded Approach

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China Communications 2014年第A02期11卷 1-11页

作者： ZHANG Yu xiong ke DU Liping School of Computer and Communication Engineering University of Science and Technology Beijing Beijing 100083 P. R. China School of Computer and Information Technology Beijing Jiaotong University Beijing 100044 P. R. China National Mobile Communications Research Laboratory Southeast University Nanjing 210018 P. R. China

This paper investigates the medium access control （MAC） stratifies for communication systems. Since the signals are naturally superposed in public medium, we introduce physical layer network coding into MAC system and propose the physical layer network coded MAC （PNC-MAC） to utilize the collisions occurring in the MAC process. The implicit expressions of the throughput and average delay of the system operated with the new algorithm are derived in an iterative way. To show the performance of the algorithm, we compare the throughput and average delay induced by the new algorithm with current schemes via simulations. The results show that when operated with our proposed PNC-MAC, MAC system can achieve a larger throughput while the frames bear shorter average delay. Moreover, in many users case, the throughput increases slightly while the average delay ascends drastically.

关键词： medium access control physical layernetwork coding tree method

Experimental study and electromechanical model analysis of the nonlinear deformation behavior of IPMC actuators

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Acta Mechanica Sinica 2017年第2期33卷 382-393页

作者： Hongguang Liu ke xiong Kan Bian Kongjun Zhu State key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics Faculty of Civil Engineering and Mechanics Jiangsu University

This paper develops analytical electromechanical formulas to predict the mechanical deformation of ionic polymer-metal composite (IPMC) cantilever actuators under DC excitation voltages. In this research, IPMC samples with Pt and Ag electrodes were manufactured, and the large nonlinear deformation and the effect of curvature on surface electrode resistance of the IPMC samples were investigated experimentally and theoretically. A distributed electrical model was modified for calculating the distribution of voltage along the bending actuator. Then an irreversible thermodynamic model that could predict the curvature of a unit part of an IPMC actuator is combined with the electrical model so that an analytical electromechanical model is developed. The electromechanical model is then validated against the experimental results obtained from Pt- and Ag-IPMC actuators under various excitation voltages. The good agreement between the electromechanical model and the actuators shows that the analytical electromechanical model can accurately describe the large nonlinear quasi-static deflection behavior of IPMC actuators.

关键词： Actuator Ionic polymer metal composite Nonlinear deformation Electromechanical model

Power Splitting Based SWIPT in Network-Coded Two-Way Networks with Data Rate Fairness:An Information-Theoretic Perspective

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China Communications 2016年第12期13卷 107-119页

作者： ke xiong Yu Zhang Yueyun Chen Xiaofei Di School of Computer and Information Technology Beijing Jiaotong University National Mobile Communications Research Laboratory Southeast University School of Computer and Communication Engineering University of Science and Technology Beijing

This paper investigates the simultaneous wireless information and powertransfer(SWIPT) for network-coded two-way relay network from an information-theoretic perspective, where two sources exchange information via an SWIPT-aware energy harvesting(EH) relay. We present a power splitting(PS)-based two-way relaying(PS-TWR) protocol by employing the PS receiver architecture. To explore the system sum rate limit with data rate fairness, an optimization problem under total power constraint is formulated. Then, some explicit solutions are derived for the problem. Numerical results show that due to the path loss effect on energy transfer, with the same total available power, PS-TWR losses some system performance compared with traditional non-EH two-way relaying, where at relatively low and relatively high signalto-noise ratio(SNR), the performance loss is relatively small. Another observation is that, in relatively high SNR regime, PS-TWR outperforms time switching-based two-way relaying(TS-TWR) while in relatively low SNR regime TS-TWR outperforms PS-TWR. It is also shown that with individual available power at the two sources, PS-TWR outperforms TS-TWR in both relatively low and high SNR regimes.

关键词： two-way relay energy harvesting wireless power transfer data rate fairness network coding

Towards green for relay in InterPlaNetary Internet based on differential game model

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Science China(Information Sciences) 2014年第4期57卷 65-73页

作者： LIN FuHong LIU Qian ZHOU XianWei xiong ke School of Computer and Communication Engineering University of Science and Technology Beijing School of Computer and Information Technology Beijing Jiaotong University State key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University

InterPlaNetary Internet(IPN)plays a very important role in the exploitation of ***,the relays in IPN are suffered from high symbol error,limited storage space,and limited available *** analyze the performance of the relay in IPN,in this article,we build a differential game model,where the controller is transmitting rate,and the goal is to maximize the payoff according to the symbol error rate,the storage space and the available energy in the *** such a design,the green relays can be achieved for IPNs,which could prolong the live of the *** the model is not easy to discuss,we analyze it using the Bellman theorem and then get some formulas on the trace of the optimal transmitting ***,extensive simulation results are presented to demonstrate the performance of our proposed model,which shows that by using our derived optimal transmitting rate trace,the relay’s payoff can be maximized.

关键词： IPN differential game symbol error limited storage space energy efficiency

Establishment and expression of recombinant human glial cell linederived neurotrophic factor and TNF α receptor in human neural stem cells

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Asian Pacific Journal of Tropical Medicine 2012年第8期5卷 651-655页

作者： ke-xiong Zhuang Wei Huang Bin Yan Department of Orthopedic Surgery Shenzhen Guanlan People's Hospital Affiliated to Guangdong Medical College Department of Spinal Surgery Shenzhen No.2 People's Hospital

Objective:To investigate the interference and expression of human glial cell line-derived neurotrophic factor(hCDNF) and soluble TNF alpha(sTMFRⅠ) receptor genes in neural stem cells and to evaluate the roles of these proteins in the genetic treatment of spinal cord ***:Full-length of GDNF cDNA(538 bp) and sTMFRⅠcDNA(504 bp) were inserted into the early 1 region of adenovirus genomic DNA respectively and were immediated by the human cytomegalovirus(gene promoter/enhancer). These adenoviruses were propagated in HEK293 cells via homologous recombination for 7-10 days in vivo,then they were used to infect human neural stem *** infection and expression of gene were tested under *** and Westem-blot after 48 ***:Almost all the cultured cells showed the nestin immunofluorescence positive staining,which was the characteristics of neural stem cell.A great quantity of EGFP and KFP were observed in neural stem cells,which indicated the expression of GDNF and sTMFRⅠ.After transfection of GDNF and sTMFRⅠgenes,many neural stem cells show GFAP and tubulin immunofluorescence positive staining,which meant that most neural stem cells differentiated into neuron at that ***:The infective efficiency of adenovirus is greatly acceptable to neural stem cell,thus adenovirus provide a useful vector for exogenous GDNF and sTMFRⅠgenes expressing in neural stem cells,which is useful for differentiation of neural stem cell.

关键词： Glial cell line-derived neurotrophic factor Tumor necrosis factor receptorⅠ Neural stem cells Gene therapy