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| 1 | Improved Hybrid Robust Control Method for the Electromechanical Actuator in Aircrafts显示文摘In the flight process of aircrafts, their electromechanical actuators(EMA) must have the ability of enduring uncertainties caused by factors such as load disturbance, the variation of work temperature and the EMA’s nonlinearity. At present, in order to increase the EMA’s robustness on the uncertainties, the H∞ control method has been applied in aircrafts. The major problems with standard H∞ control lie in the large overshoot of step response and the high orders of the controller. For the purpose of addressing the two problems, this paper investigates several kinds of robust control strategies of the EMA. A mathematical model of the EMA is first built, and then with MATLAB software a H∞ controller and an improved hybrid robust controller composed of a reduced order H∞ controller and a lead compensator are designed. In order to make a scientific comparison of the control effects of H∞ controller, hybrid controller and classic proportion-integral-differential(PID) controller, a simulation research is made in respect of the open loop frequency response and the closed loop step response of the three controllers. For comparing the robustness of the three controllers, the load torque is entered as a disturbance and the disturbance response of error and control input are thus obtained. The experiments with the three controllers are also conducted. Through giving the EMA a command and a disturbance torque successively, the transient response and disturbing process of EMA are recorded. The simulation and experiment results show that with the help of the hybrid controller, the EMA not only guarantees good dynamic characteristics, but also has strong robustness of disturbance rejection. Therefore, the excogitated H∞ hybrid control method effectively solves the problem of large overshoot in dynamic response, and moderately meets the requirement of overcoming the uncertainties in the EMA of aircrafts. | LU Hao LI Yunhu TIAN Shengli NIE Zhenjin | 2010 | Chinese Journal of Mechanical Engineering2010，23，4： | 8 |
| 2 | Persistence and Periodic Solution on a Nonautonomous SIS Model with Delays显示文摘An SIS model with periodic maximum infectious force,recruitment rate and removal rate of the infectives has been investigated in this articale.Sufficient conditions for the permanence and extinction of the disease are obtained.Furthermore,The existence and global stability of positive periodic solution are established.Finally,we present a procedure by which one can control the parameters of the model to kccp the infcctivcs stay eventually in a desired set. | San-ling Zhi-enMa ZhenJin | 2003 | Acta Mathematicae Applicatae Sinica2003，19，1： | 5 |
| 3 | Tailoring Nitrogen Terminals on MXene Enables Fast Charging and Stable Cycling Na-Ion Batteries at Low Temperature显示文摘Sodium-ion batteries stand a chance of enabling fast charging ability and long lifespan while operating at low temperature(low-T).However,sluggish kinetics and aggravated dendrites present two major challenges for anodes to achieve the goal at low-T.Herein,we propose an interlayer confined strategy for tailoring nitrogen terminals on Ti_(3)C_(2) MXene(Ti_(3)C_(2)-N_(funct)) to address these issues.The introduction of nitrogen terminals endows Ti_(3)C_(2)-N_(funct) with large interlayer space and charge redistribution,improved conductivity and sufficient adsorption sites for Na^(+),which improves the possibility of Ti_(3)C_(2) for accommodating more Na atoms,further enhancing the Na^(+) storage capability of Ti_(3)C_(2).As revealed,Ti_(3)C_(2)-N_(funct) not only possesses a lower Na-ion diffusion energy barrier and charge trans-fer activation energy,but also exhibits Na^(+)-solvent co-intercalation behavior to circumvent a high de-solvation energy barrier at low-T.Besides,the solid electrolyte interface dominated by inorganic com-pounds is more beneficial for the Na^(+)transfer at the electrode/electrolyte interface.Compared with of the unmodified sample,Ti_(3)C_(2)-Nfunct exhibits a twofold capacity(201 mAh g^(-1)),fast-charging ability(18 min at 80% capacity retention),and great superiority in cycle life(80.9%@5000 cycles)at -25℃.When coupling with Na_(3)V_(2)(PO_(4))_(2)F_(3) cathode,the Ti_(3)C_(2)-N_(funct)//NVPF exhibits high energy density and cycle stability at -25℃. | Yang Xia Lanfang Que Fuda Yu Liang Deng Zhenjin Liang Yunshan Jiang Meiyan Sun Lei Zhao Zhenbo Wang | 2022 | Nano-Micro Letters2022，14，9： | 3 |
| 4 | The upper bound of the minimal number of hidden neurons for the parity problem in binary neural networks显示文摘Binary neural networks (BNNs) have important value in many application areas.They adopt linearly separable structures,which are simple and easy to implement by hardware.For a BNN with single hidden layer,the problem of how to determine the upper bound of the number of hidden neurons has not been solved well and truly.This paper defines a special structure called most isolated samples (MIS) in the Boolean space.We prove that at least 2 n 1 hidden neurons are needed to express the MIS logical relationship in the Boolean space if the hidden neurons of a BNN and its output neuron form a structure of AND/OR logic.Then the paper points out that the n -bit parity problem is just equivalent to the MIS structure.Furthermore,by proposing a new concept of restraining neuron and using it in the hidden layer,we can reduce the number of hidden neurons to n .This result explains the important role of restraining neurons in some cases.Finally,on the basis of Hamming sphere and SP function,both the restraining neuron and the n -bit parity problem are given a clear logical meaning,and can be described by a series of logical expressions. | LU Yang YANG Juan WANG Qiang HUANG ZhenJin | 2012 | Science China(Information Sciences)2012，55，7： | 2 |
| 5 | Biological abnormality of impaired reading is constrained by culture显示文摘 | Siok Wai Ting Charles A.Perfetti Zhenjin Li Hai Tan | | 0，，： | 1 |
| 6 | Flammability characteristics and synergistic effect of hydrotaleite with microeneapsulated red phosphorus in halogen-free flame retardant EVA composite 显示文摘 | Longchao Du Baojun Qu Zhenjin Xu | 2006 | Polymer Degradation and Stability2006，91，： | 1 |
| 7 | Flammability characteristics and synergistic effect of hydrotalcite with microencapsulated red phosphorus in halogen-free flame retardant EVA composite显示文摘 | Longchao Du Baojun Qu Zhenjin Xu | 2006 | Polymer Degradafion and Stahility2006，91，： | 1 |
| 8 | Scalp acupuncture Yikang therapy on Baihui(GV20),Sishencong(EX-HN1),Zhisanzhen,Niesanzhen improves neurobehavior in young rats with cerebral palsy through Notch signaling pathway显示文摘OBJECTIVE:To investigate the efficacy of scalp acupuncture Yikang therapy on Baihui(GV20),Sishencong(EX-HN1),Zhisanzhen,Niesanzhen,on neurobehavior in young rats with cerebral palsy based on Notch signaling pathway.METHODS:Thirty 7-day-old rats were randomly divided into sham,model and acupuncture,10 rats in each group.The cerebral palsy model was established by the accepted modeling method,the acupuncture group selected'Baihui(GV20)','Sishencong(EX-HN1)','Zhisanzhen'and'Niesanzhen'for intervention 24 h after the model was made.The body masses were recorded before and after the treatment,respectively.After the intervention,the rats were subjected to suspension experiment,slope experiment,tactile stimulation experiment and Morris water maze experiment.After the end of the experiment,the morphological changes of hippocampal histology were observed by hematoxylineosin(HE)staining under light microscope,and the expression of Notch1,Notch3 and Hes5 were detected by Western blot and quantitative real-time polymerase chain reaction(PCR).RESULTS:The changes in body mass of the rats in each group were different;in behavioral experiments,compared with the sham,the suspension time of the model was shortened,the slope experiment,tactile stimulation experiment,and escape latency time were prolonged,and the number of platform crossing was reduced in the model,compared with the model,the suspension time of the acupuncture was prolonged,the slope experiment,tactile stimulation experiment,and escape latency time were shortened,and the number of platform crossing times was increased;HE staining showed severe hippocampal damage in the model and reduced hippocampal damage in the acupuncture.Western Blot and real-time fluorescence quantitative PCR showed that the expression of Notch1,Notch3 and Hes5 were increased in the model and the expression of Notch1,Notch3,Hes5 in acupuncture were decreased.CONCLUSIONS:Scalp acupuncture Yikang therapy may improve neurobehavior and reduce brain injury in rats with cerebral palsy by downregulating the expression of Notch1,Notch3,and Hes5. | XUE Jianyi XU Jinyan HUANG Mao YU Wentao YAN Yihui YAN Yuanjie YIN Zhenjin LU Qian PENG Wanying YAN Siyang | 2023 | Journal of Traditional Chinese Medicine2023，43，2： | 1 |
| 9 | Flammability characteristics and synergistic effect of hydrotalcite with microencapsulated red phosphorus in halogen-free flame retardant EVA composite 显示文摘 | DU Longchao QU Baojun XU Zhenjin | 2006 | Polym Degrad Stability2006，91，5： | 1 |
| 10 | Multifunctional Au‐Coated TiO2 Nanotube Arrays as Recyclable SERS Substrates for Multifold Organic Pollutants Detection显示文摘 | XuanhuaLi GuangyuChen LiangbaoYang ZhenJin JinhuaiLiu | 2010 | Adv. Funct. Mater2010，，17： | 1 |
| 11 | Flammability characteristics and synergistic effect of hydrotalcite with microencapsulated red phosphorus in halogen-free flame retardant EVA composite显示文摘 | Longchao Du Baojun Qu Zhenjin Xu | 2006 | Polymer Degradation and Stability2006，91，5： | 1 |
| 12 | Flammability characterization and synergistic effect of hydrotalcite with microencapsulatedred phosphorus in halogen-free flame retardant EVA composite 显示文摘 | DU Longchao Qu Baojun XU Zhenjin | 2006 | Polym Degrad Stab2006，91，5： | 1 |
| 13 | Flammability characteristics and synergistic effect of hydrotalcite with microencapsulated red phosphorus in halogen-free flame retardant EVA composite显示文摘 | Du Longchao Qu Baojun Xu Zhenjin | 2006 | Polymer Degradation and Stability2006，91，： | 1 |
| 14 | Therapeutic efficacy of Aredia in the treatment of metastatic bone tumors- induced pain显示文摘 | GE ZHENJIN | 2000 | China Clin ical Tumors2000，4，： | 1 |
| 15 | Effect of Loss of Blowing Agents on Thermal Insulation Properties of Polystyrene Foams 显示文摘 | Zhu Zhenjin Jin Ho Zong Chul B Park | 2009 | Journal of Heat Transfer2009，131，5： | 1 |
| 16 | Reusable and efficient polystyrene-supported acidic ionic liquid catalyst for esterifications 显示文摘 | XU Zhenjin WAN Hui MIAO Jinmei | 2010 | Mol Catal A2010，332，12： | 1 |
| 17 | Separation of peptides by pressurized capillaryelec-matography显示文摘 | Kai Zhang Zhenjin Jiang Chuanyi Yao | 2003 | Journal of Chromatography A2003，，987： | 1 |
| 18 | Sulfur-doped CMK-5 with expanded lattice for high-performance lithium ion batteries显示文摘Heteroatom-doped porous carbon materials are very attractive for lithium ion batteries(LIBs) owing to their high specific surface areas, open pore structures, and abundant active sites. However, heteroatomdoped porous carbon with very high surface area and large pore volume are highly desirable but still remain a big challenge. Herein, we reported a sulfur-doped mesoporous carbon(CMK-5-S) with nanotubes array structure, ultrahigh specific surface area(1390 m^(2)/g), large pore volume(1.8 cm^(3)/g), bimodal pore size distribution(2.9 and 4.6 nm), and high sulfur content(2.5 at%). The CMK-5-S used as an anode material for LIBs displays high specific capacity, excellent rate capability and highly cycling stability. The initial reversible specific capacity at 0.1 A/g is as high as 1580 mAh/g and simultaneously up to 701 mAh/g at 1A/g even after 500 cycles. Further analysis reveals that the excellent electrochemical storage performances is attributed to its unique structures as well as the expanded lattice by sulfur-doping. | Zhenjin Liang Yuhao Peng Xing Zhang Kewei Cao Wei Xiao Dong Gu | 2023 | Chinese Chemical Letters2023，34，7： | 0 |
| 19 | POSSIBLE HIGH A1 SUBSTITUTION IN THE T1-Ba-Ca-Cu-O SUPERCONDUCTING SYSTEM显示文摘The A1 substitution in the T1-Ba-Ca-Cu-O superconducting system was studied.Up to 70%of Tl can be substituted by Al,without significant reduction of Tc.X-ray diffraction indicates partial A1 substitution does not alter the crystal structure of the 2223 phase.Excessive A1 formed Al-Cu alloy and unidentified phases,which gradually destroyed the superconductivity. | MENG Xianren LIN Mingzhu TANG Weihua REN Yanru LIN Zhenjin TU Qingyun SANG Lihua LIU Zhenxing | 1990 | Chinese Physics Letters1990，7，3： | 0 |
| 20 | A flexible pressure sensor with highly customizable sensitivity and linearity via positive design of microhierarchical structures with a hyperelastic model显示文摘The tactile pressure sensor is of great significance in flexible electronics,but sensitivity customization over the required working range with high linearity still remains a critical challenge.Despite numerous efforts to achieve high sensitivity and a wide working range,most sensitive microstructures tend to be obtained only by inverting naturally existing templates without rational design based on fundamental contact principles or models for piezoresistive pressure sensors.Here,a positive design strategy with a hyperelastic model and a Hertzian contact model for comparison was proposed to develop a flexible pressure sensor with highly customizable linear sensitivity and linearity,in which the microstructure distribution was precalculated according to the desired requirement prior to fabrication.As a proof of concept,three flexible pressure sensors exhibited sensitivities of 0.7,1.0,and 1.3 kPa−1 over a linear region of up to 200 kPa,with a low sensitivity error(<5%)and high linearity(~0.99),as expected.Based on the superior electromechanical performance of these sensors,potential applications in physiological signal recognition are demonstrated as well,and such a strategy could shed more light on demand-oriented scenarios,including designable working ranges and linear sensitivity for next-generation wearable devices. | Zhenjin Xu Dezhi Wu Zhiwen Chen Zhongbao Wang Cong Cao Xiangyu Shao Gang Zhou Shaohua Zhang Lingyun Wang Daoheng Sun | 2023 | Microsystems & Nanoengineering2023，9，1： | 0 |
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