|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Attitude tracking control for variable structure near space vehicles based on switched nonlinear systems显示文摘An adaptive robust attitude tracking control law based on switched nonlinear systems is presented for a variable structure near space vehicle (VSNSV) in the presence of uncertainties and disturbances. The adaptive fuzzy systems are employed for approximating unknown functions in the flight dynamic model and their parameters are updated online. To improve the flight robust performance, robust controllers with adaptive gains are designed to compensate for the approximation errors and thus they have less design conservation. Moreover, a systematic procedure is developed for the synthesis of adaptive fuzzy dynamic surface control (DSC) approach. According to the common Lyapunov function theory, it is proved that all signals of the closed-loop system are uniformly ultimately bounded by the continuous controller. The simulation results demonstrate the effectiveness and robustness of the proposed control scheme. | Wang Yufei Jiang Changsheng Wu Qingxian | 2013 | Chinese Journal of Aeronautics2013，26，1： | 21 |
| 2 | Schisandra sphenanthera extract(Wuzhi Tablet)protects against chronic-binge and acute alcohol-induced liver injury by regulating the NRF2-ARE pathway in mice显示文摘Alcohol abuse leads to alcoholic liver disease and no effective therapy is currently available.Wuzhi Tablet(WZ), a preparation of extract from Schisandra sphenanthera that is a traditional hepatoprotective herb, exerted a significant protective effect against acetaminophen-induced liver injury in our recent studies, but whether WZ can alleviate alcohol-induced toxicity remains unclear. This study aimed to investigate the contribution of WZ to alcohol-induced liver injury by using chronic-binge and acute models of alcohol feeding. The activities of ALT and AST in serum were assessed as well as the level of GSH and the activity of SOD in the liver. The expression of CYP2E1 and proteins in the NRF2-ARE signaling pathway including NRF2, GCLC, GCLM, HO-1 were measured, and the effect of WZ on NRF2 transcriptional activity was determined. We found that both models resulted in liver steatosis accompanied by increased transaminase activities, but that liver injury was significantly attenuated by WZ. WZ administration also inhibited CYP2E1 expression induced by alcohol, and elevated the level of GSH and the activity of SOD in the liver. Moreover, the NRF2-ARE signaling pathway was activated by WZ andthe target genes were all upregulated. Furthermore, WZ significantly activated NRF2 transcriptional activity. Collectively, our study demonstrates that WZ protected against alcohol-induced liver injury by reducing oxidative stress and improving antioxidant defense, possibly by activating the NRF2-ARE pathway. | Xuezhen Zeng Xi Li Chenshu Xu Fulin Jiang Yufei Mo Xiaomei Fan Yaoting Li Yiming Jiang Dongshun Li Min Huang Huichang Bi | 2017 | Acta Pharmaceutica Sinica B2017，7，5： | 13 |
| 3 | Recent advances of wearable and flexible piezoresistivity pressure sensor devices and its future prospects显示文摘The human skin inspired soft electronic devices have attracted broadly research attention in the past decades as the promising potential applications in health monitoring and diagnosis,robotics,and prosthetics.The soft wearable piezoresistivity pressure sensor is one of the most attractive candidates for the development of advanced electronic skin for its simple mechanism,compact structure,low cost and power energy consumption and ease of signal acquisition and transforms advantages.In this review,we will explore the recent progress and achievements in the field of piezoresistivity pressure sensor,focusing on the fundamentals of the piezoresistivity pressure sensor and the materials related to the devices,including active materials,substrate materials,and electrode materials.Subsequently,the challenges and outlook are discussed.We list several current challenges perspectives on the development of pressure sensors.Several critical topics for the optimization of the sensitivity and working range of sensing devices toward practical applications are discussed.Finally,perspectives on the slip and force vectors sensors,the developing technologies for multi-function and high-resolution sensor systems and signals process technologies are examined to highlight the near future development tendency in piezoresistivity pressure sensor research field. | Jiang He Yufei Zhang Runhui Zhou Lirong Meng Tao Chen Wenjie Mai Caofeng Pan | 2020 | Journal of Materiomics2020，6，1： | 9 |
| 4 | Analysis of complex intermittency in Boost converter from a bifurcation control viewpoint显示文摘Due to undesirable interference via unintended coupling paths, switching converters may exhibit complex intermittency, which appears as a form of bifurcation un-dergoing regular operation, subharmonics, and chaos orderly and repeatedly for a long period of time. Such intermittent operation, being an unwanted operating state, should normally be avoided in power converters. This paper expounds the mechanism and conditions for the emergence of intermittency in a common current-mode controlled Boost converter. It is found that interference at frequencies near the switching frequency or its rational multiples may induce intermittent operation. The strengths and frequencies of the interfering signals determine the type and period of intermittency. The problem is analyzed by transforming the time-bifurcation analysis to a conventional parameter-bifurcation analysis. Based on this transformation, intermittency can be investigated from the bifurcation control viewpoint. Furthermore, the critical circuit parameter conditions for the emergence of inter-mittency can be predicted and compared with those from circuit simulation. | ZHOU YuFei JIANG XueDong CHEN JunNing | 2008 | Science in China(Series F)2008，51，12： | 8 |
| 5 | Fault tolerant control for near space vehicle:a survey and some new results显示文摘A review on fault-tolerant control(FTC) for near space vehicle(NSV) is presented.First,the concept of near space is introduced,the background of NSV is emphasized,and the model characteristics of NSV in faulty case are investigated.Then,a comparison of different existing approaches is briefly carried out,and achievements on the current research in this field are also presented in the view of the practical application.Furthermore,several existing advanced FTC results for nonlinear flight control systems are given.Finally,the recent literature of NSV are presented to provide an overall view of future developments in this area. | Yufei Xu Bin Jiang Zhifeng Gao Ke Zhang | 2011 | Journal of Systems Engineering and Electronics2011，22，1： | 7 |
| 6 | Principle of designing slope compensation in PFC Boost converter显示文摘Due to wide input fluctuation with line frequency of 50 Hz, power-factor-correction (PFC) Boost converters tend to exhibit fast-scale instability over time domain. The traditional remedy is to impose slope compensation so as to weaken or eliminate this instability. A theoretical principle on the implementation of slope compensation signal is still lacking. Empirical design will induce over compensation frequently, resulting in a large decrease of power factor. In order to tackle this issue, by constructing the discrete-time iterative map of the PFC Boost converter from the viewpoint of bifurcation control theory of nonlinear systems, consequently, the criterion of critical stability for the PFC circuit can be established. Based on this stability criterion, appropriate design of slope compensation can be achieved. Our work indicates that 3 main circuit parameters (i.e. switching cycle, output reference voltage and inductor) determine the effective amplitude design of the slope compensation signal. The results, validated by a large quantity of analytical and numerical studies, show that appropriate slope compensation can be effective in weakening (or controlling) fast-scale bifurcation while maintaining a rather high input power factor. | ZHOU YuFei HUANG JiaCheng WANG ShiBing JIANG Wei CHEN JunNing | 2009 | Science in China(Series F)2009，52，11： | 6 |
| 7 | Theoretical Calculations and Experimental Verification for the Pumping Effect Caused by the Dynamic Micro-tapered Angle显示文摘The atomizer with micro cone apertures has advantages of ultra-fine atomized droplets, low power consumption and low temperature rise. The current research of this kind of atomizer mainly focuses on the performance and its application while there is less research of the principle of the atomization. Under the analysis of the dispenser and its micro-tapered aperture's deformation, the volume changes during the deformation and vibration of the micro-tapered aperture on the dispenser are calculated by coordinate transformation. Based on the characters of the flow resistance in a cone aperture, it is found that the dynamic cone angle results from periodical changes of the volume of the micro-tapered aperture of the atomizer and this change drives one-way flows. Besides, an experimental atomization platform is established to measure the atomization rates with different resonance frequencies of the cone aperture atomizer. The atomization performances of cone aperture and straight aperture atomizers are also measured. The experimental results show the existence of the pumping effect of the dynamic tapered angle. This effect is usually observed in industries that require low dispersion and micro- and nanoscale grain sizes, such as during production of high-pressure nozzles and inhalation therapy. Strategies to minimize the pumping effect of the dynamic cone angle or improve future designs are important concerns. This research proposes that dynamic micro-tapered angle is an important cause of atomization of the atomizer with micro cone apertures. | CAI Yufei ZHANG Jianhui ZHU Chunling HUANG Jun JIANG Feng | 2016 | Chinese Journal of Mechanical Engineering2016，29，3： | 6 |
| 8 | Adaptive sliding mode backstepping control for near space vehicles considering engine faults显示文摘A fault tolerant control methodology based adaptive sliding mode(ASM) backstepping is proposed for near space vehicle(NSV) attitude control system under engine faults. The proposed scheme combined adaptive backstepping with the sliding mode control strategy could guarantee the system's stability and track desired signals under external disturbances and engine faults. Firstly, attitude mode description and the engine faulty model are given. Secondly, a nominal control law is designed.Thirdly, a sliding mode observer is given later in order to estimate both the information of engine faults and external disturbances. An adaptive sliding mode technology based on the previous nominal control law is developed via updating faulty parameters. Finally,analyze the system's fault-tolerant performance and reliability through experiment simulation, which verifies the proposed design of fault-tolerant control can tolerate engine faults, as well as the strong robustness for external disturbance. | ZHAO Jing JIANG Bin XIE Fei GAO Zhifeng XU Yufei | 2018 | Journal of Systems Engineering and Electronics2018，29，2： | 5 |
| 9 | 1-Naphthol induced PtsAg nanocorals as bifunctional cathode and anode catalysts of direct formic acid fuel cells显示文摘Developing highly efficient bifunctional cathode and anode electrocatalysts is very important for the large-scale application of direct formic acid fuel cells. However, the high-cost and poor CO-tolera nee ability of the most commonly used Pt greatly block this process. To in crease the utilizatio n efficie ncy and exte nd bifunctional properties of precious Pt, herei n, coral-like Pt3Ag nano crystals are developed as an excelle nt bifunctional electrocatalyst through a facile one-pot solvothermal method. The formation mechanism of Ptgg nanocorals has been elaborated well via a series of control experiments. It is proved that 1-naphthol serving as a guiding surfactant plays a key role in the formation of high-quality nano corals. Thanks to the unique coral-like structure and alloy effects, the developed Ptgg nano corals present sign ificantly enhanced electrocatalytic properties (including activity, stability and CO-toleranee ability) towards both the cathodic oxygen reduction and anodic formic acid oxidati on, as compared with those of commercial Pt black and Pt-based nan oparticles. The prese nt synthetic method can also be extended to fabricate other bimetallic electrocatalysts with unique morphology and structure. | Xian Jiang Yang Liu Jiaxin Wang Yufei Wang Yuexin Xiong Qun Liu Naixu Li Jiancheng Zhou Gengtao Fu Dongmei Sun Yawen Tang | 2019 | Nano Research2019，12，2： | 4 |
| 10 | Fabrication of gelatin methacryloyl hydrogel microneedles for transdermal delivery of metformin in diabetic rats显示文摘Injection therapy for diabetes has poor patient compliance,and the pain occurring at the site of subcutaneous injections causes significant inconvenience to diabetic patients.In this work,to demonstrate the benefits of an alternative drug delivery technique that overcomes these issues,methacrylated gelatin hydrogel-forming microneedles integrated with metformin were developed to adjust blood glucose levels in diabetic rats.Gelatin methacryloyl microneedles(GelMA-MNs)with different degrees of substitution were successfully prepared by a micro-molding method.The resultant GelMA-MNs exhibited excellent mechanical properties and moisture resistance.Metformin,an anti-diabetic drug,was further encapsulated into the GelMA-MNs,and its release rate could be controlled by the three-dimensional cross-linked network of microneedles,thereby exhibiting sustained drug release behaviors in vitro and implying a better therapeutic effect compared with that of subcutaneous injection in diabetic rats.The drug release period could be significantly prolonged by improving the cross-link density of GelMA-MNs.The results of hypoglycemic effect evaluation show that the application of GelMA-MNs for transdermal delivery in diabetic rats has promising benefits for diabetes treatment. | Zhiyong Zeng Guohua Jiang Tianqi Liu Gao Song Yanfang Sun Xueya Zhang Yanting Jing Mingjia Feng Yufei Shi | 2021 | Bio-Design and Manufacturing2021，4，4： | 4 |
| 11 | Integrative Analysis Reveals Enhanced Regulatory Effects of Human Long Intergenic Non-Coding RNAs in Lung Adenocarcinoma显示文摘Although there is an accumulating appreciation of the key roles that long intergenic non-coding RNAs(linc RNAs) play in diverse cellular processes, our knowledge of how linc RNAs function in cancer remains sparse. Here, we present a comprehensive landscape of RNA-seq transcriptome profiles of lung adenocarcinomas and their paired normal counterparts to unravel gene regulation rules of linc RNAs.Consistent with previous findings of co-expression between neighboring protein-coding genes, linc RNAs were typically co-expressed with their neighboring genes, which was found in both cancerous and normal tissues. By building a mathematical model based on correlated gene expression, we distinguished an additional subset of linc RNAs termed 'regulatory linc RNAs', representing their dominant roles in gene regulation. The number of regulatory linc RNAs was significantly higher in cancerous compared to normal tissues, and most of them positively regulated protein-coding genes in trans. Functional validation, using knockdown, determined that regulatory linc RNA,GAS5, affected its predicted protein-coding targets. Moreover, we discovered hundreds of differentially expressed regulatory linc RNAs with inclusion of some cancer-associated linc RNAs. Our integrated analysis reveals enhanced regulatory effects of linc RNAs and provides a resource for the study of regulatory linc RNAs that play critical roles in lung adenocarcinoma. | You Zhou Kai Wu Jianping Jiang Jinfei Huang Peiwei Zhang Yufei Zhu Guohong Hu Jingyu Lang Yufang Shi Landian Hu Tao Huang Xiangyin Kong | 2015 | Journal of Genetics and Genomics2015，42，8： | 3 |
| 12 | Hierarchical carbon nanocages as high-rate anodes for Li-and Na-ion batteries显示文摘新奇的层次碳 nanocages (hCNCs ) 为 Li 离子和 Na 离子电池作为高率的阳极被建议。为 hCNCs 的多孔的网络的唯一的结构极大地赞成电解质穿入,离子散开,电子传导,和结构的稳定性,导致高率能力和优秀 cyclability。为锂存储,相应电极存储 970 mAh 的一个稳定的可逆能力吗? | Zhiyang Lyu Lijun Yang Dan Xu Jin Zhao Hongwei Lai Yufei Jiang Qiang Wu Yi Li Xizhang Wang Zheng Hu | 2015 | Nano Research2015，8，11： | 3 |
| 13 | China Antihypertensive Trial in Acute Ischemic Stroke II (CATIS-2): rationale and design显示文摘Backgrounds Increased blood pressure(BP)for patients who had an acute ischaemic stroke is associated with poor functional outcome,however the optimal timing of antihypertensive therapy is unknown.Aims We aim to compare early antihypertensive treatment to delayed antihypertensive treatment for reducing the risk of composite major disability and mortality at 3 months in acute ischaemic stroke.Design The China Antihypertensive Trial in Acute Ischemic Stroke II(CATIS-2)trial is a multicentre,randomised,open-label,blinded-endpoints trial that will be conducted in 100 hospitals in China.The primary outcome is the composite of death and major disability(modified Rankin Scale score≥3)at 3 months of randomisation.Antihypertensive treatment will be received immediately after randomisation in the early treatment group,aimed at average systolic BP by 10%-20%reduction within the first 24 hours,and achieving an average BP level of<140/90 mm Hg within 5 days.Patients in the delayed treatment group will discontinue any antihypertension medications for the first 7 days of randomisation,and will receive antihypertensive therapy achieving a BP goal of<140/90 mm Hg after 7 days.Conclusion The CATIS-2 trial will be testing the hypotheses that early BP lowering leads to improved functional outcome without any other harms,and developing clinical guidelines of the BP management for patients who had an acute ischaemic stroke. | Liping Liu Yilong Wang Xuewei Xie Dacheng Liu Aili Wang Penglian Wang Suwen Shen Chongke Zhong Yufei Wei Tan Xu Yuesong Pan Yong Jiang Xia Meng David Wang Yonghong Zhang Jiang He Yongjun Wang | 2021 | Stroke & Vascular Neurology2021，6，2： | 3 |
| 14 | Design and Optimization of Dual-Winding Fault-Tolerant Permanent Magnet Motor显示文摘To improve the performance of the traditional fault-tolerant permanent magnet(PM)motor,the design and optimal schemes of dual-winding fault-tolerant permanent magnet motor(DWFT-PMM)are proposed and investigated.In order to obtain small cogging torque ripple and inhibiting the short-circuit current,the air gap surface shape of the PM and the anti short-circuits reactance parameters are designed and optimized.According to the actual design requirements of an aircraft electrical actuation system,the parameters,finite element analysis and experimental verification of the DWFT-PMM after optimal design are presented.The research results show that the optimized DWFT-PMM owns the merits of strong magnetic isolation,physics isolation,inhibiting the short circuit current,small cogging torque ripple and high fault tolerance. | Xuefeng Jiang Shaoshuai Wang Qiang Li Yufei Gao | 2019 | CES Transactions on Electrical Machines and Systems2019，3，1： | 2 |
| 15 | Multimodel-based flight control system reconfiguration control in the presence of input constraints显示文摘In this paper,an active fault accommodate strategy is proposed for the plant in the presence of actuator fault and input constraints,which is a combination of a direct adaptive control algorithm with multiple model switching.The μ-modification is introduced in the model reference architecture to construct the adaptive controller.The proof of stability is based on the candidate Lyapunov function,while appropriate switching of multiple models guarantees asymptotic tracking of the system states and the boundedness of all signals.Simulation results illustrate the efficiency of the proposed method. | Yuying GUO Bin JIANG Yufei XU | 2010 | 控制理论与应用(英文版)2010，8，4： | 2 |
| 16 | Thermodynamic analysis for a chemically recuperated scramjet显示文摘Endothermic hydrocarbon fuel is regarded as an optimal fuel for a scramjet with regenerative cooling,which provides extra cooling through endothermic chemical conversion to avoid the severly limited cooling capacity when conventional fuels are adopted for cooling.Although endothermic cooling is proposed from the view point that the heat sink of a conventional fuel is insufficient,the heat-absorbing through endothermic chemical reaction is actually a chemical recuperation process because the wasted heat dissipated from the engine thermal structure is recovered through the endothermic chemical reaction.Therefore,the working process of a scramjet with endothermic hydrocarbon fuel cooling is a chemical recuperative cycle.To analyze the chemical recuperative cycle of a chemically recuperated scramjet engine,we defined physical and chemical recuperation effectivenesses and heating value increment rate,and derived engine performance parameters with chemical recuperation.The heat value benefits from both physical and chemical recuperations,and it increases with the increase in recuperation effectiveness.The scramjet performance parameters also increase with the increase in chemical recuperation effectiveness.The increase in chemical recuperation effectiveness improves both the performances of the fuel cooling system and the combustion system.The results of analysis prove that the existence of a chemical recuperation process greatly improves the performance of the whole scramjet. | QIN Jiang BAO Wen ZHANG SiLong SONG YuFei YU DaRen | 2012 | Science China(Technological Sciences)2012，55，11： | 2 |
| 17 | Effects of the slip wall on the drag and coherent structures of turbulent boundary layer显示文摘A comparative experiment by time-resolved particle image velocimetry(TRPIV)of the turbulent boundary layer(TBL)over a smooth surface and an anisotropy superhydrophobic(SH)surface was carried out in an open-surface recirculating water channel at Re_(τ,smooth)=650.Thewall friction velocity is fittedwell from the velocity of the viscous sublayer calculated by the Single-pixel resolution ensemble correlation(SPEC).After that,a drag reduction rate of 17%,a slip velocity of 0.0119 m/s,and a slip length of 90.8μm are obtained over the SH surface.In the main modes of the reduced-order flow fields,the wave packet structures over the SH surface become“upright”.Such large-scale structures in motion are also found in the instantaneous field.According to the statistical results of the correlation,it is found that the slip wall leads to the change of the convection velocity at different positions of the structure,which leads to the change of structure morphology and the distortion of the shear layer. | Xinwei Wang Yufei Wang Haiping Tian Nan Jiang | 2021 | Acta Mechanica Sinica2021，37，8： | 2 |
| 18 | Pliocene charcoals from Shanxi Province of China and their application to studies of prehistoric wildfires显示文摘Charcoals collected from the middle-late Pliocene sediments of the Taigu Basin,Shanxi Province,China,have been identified as Ulmus sp.(Ulmaceae),Prunus sp.,Maloidoxylon sp.(Rosaceae),and Maclura sp.(Moraceae).These taxa,along with the previously known fossils,indicate the occurrence of temperate climate and local wildfire at that time.Charcoals of trees and/or shrubs and the morphological changes of these charcoals demonstrate that crown fires and surface fires occurred in the Taigu Basin during the middle-late Pliocene. | CHENG YeMing JIANG XiaoMei LI ChengSen WANG YuFei | 2011 | Science China Earth Sciences2011，54，4： | 1 |
| 19 | Research of the planar optical fiber Bragg grating hydrophone probe显示文摘这篇论文论述平面纤维布拉格栅栏(FBG ) 水中听音器探查察觉到原则,并且理论上并且试验性地研究探查结构敏感,收到的敏感频率反应特征和加速反应性质。平面表用不锈钢做的,它的厚度是 0.15 公羊,它的直径是空圆形的壳的 15mm,和长度是 20 公羊。为结构的这种尺寸,探查结构敏感直到 23 fm/Pa,它是大约 7300 次赤裸的纤维的价值。回声频率是 6.5 kHz,和反应是的收到的敏感的振幅频率曲线相对在到 5.5 kHz 的 100 Hz 的频率范围以内的命令。一单位加速(1 m/s2 ) 产出的产量等价于(2.52 ~ 3.26 Pa ) 声学的压力代理输出。这探查结构是容易的由 multiplexing technique.The 研究表演形成 FBG 水中听音器数组这平面结构能不仅形成 FBG 水中听音器探查,而且能组成光 FBG 激光水中听音器探查。结构能认识到不同带宽,不同范围由调整表的几何尺寸的声学的压力测量。 | WANG Junjie JIANG Desheng XIE Guanmo: LIANG Yufei HUANG Junbin | 2008 | Chinese Journal of Acoustics2008，27，1： | 1 |
| 20 | Joint Power and Duty-Cycle Design Using Alternating Optimization Algorithm under Energy Harvesting Architectures显示文摘In the emerging sixth generation(6G)communication network,energy harvesting(EH)is a promising technology to achieve the unlimited energy supply and hence makes the wireless communication systems self-sustainable in terms of energy.However,in practice,the efficiency of energy harvesting is often low due to the limited device capability.In this paper,we formulate three types of different EH architectures,i.e.,the harvest-use architecture,the harvest-store-use architecture,and the harvest-use-store architecture from the perspective of energy storage efficiency.We propose resource allocation schemes to jointly design the sensor power and duty-cycle via an alternating optimization algorithm under the above EH architectures,in both simultaneous and non-simultaneous harvesting and utilization models,aiming at achieving a higher throughput and energy efficiency.Non-ideal circuit power is also considered.Numerical results show that our proposed schemes under EH architectures outperform the existing classic continuous transmission schemes. | Tong Wang Xiang Yang Feng Deng Lin Gao Yufei Jiang Zhihua Yang | 2020 | China Communications2020，17，12： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员