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| 1 | Effects of a check dam system on the runoff generation and concentration processes of a catchment on the Loess Plateau显示文摘As an important soil and water conservation engineering measure,more than 100,000 check dams are constructed across the Loess Plateau;these dams play a vital role in reducing floods and sediment in the region.However,the effects of check dams on hydrologic process are still unclear,particularly when they are deployed as a system for watershed soil and water management.This study examined the watershed hydrologic process modulated by the check dam system in a typical Loess Plateau catchment.By simulating scenarios with various numbers of check dams using a distributed physically-based hydro-logical model,the effects of the number of check dams on runoff generation and concentration were analyzed for the study catchment.The results showed that the presence of check dams reduced the peak discharge and the flood volume and extended the flood duration;the reduction effect on peak discharge was most significant among the three factors.The system of check dams substantially decreased the runoff coefficient,and the runoff coefficient reduction rate was greater for rainstorms with shorter return periods than for rainstorms with longer return periods.The check dams increased the capacity of the catchment regulating and storing floods and extended the average runoff concentration time in the catchment that flattened the instantaneous unit hydrograph.This study reveals the influencing mech-anism of check dam system on the watershed hydrological process under heavy rainstorm conditions and provides a theoretical basis for evaluating the effects of numerous check dams on regional hydrology and water resources on the Loess Plateau. | Shuilong Yuan Zhanbin Li Li Chen Peng Li Zeyu Zhang Junzheng Zhang Anna Wang kunxia Yu | 2022 | International Soil and Water Conservation Research2022，10，1： | 3 |
| 2 | Traffic Flow Statistics Method Based on Deep Learning and Multi-Feature Fusion显示文摘Traffic flow statistics have become a particularly important part of intelligent transportation.To solve the problems of low real-time robustness and accuracy in traffic flow statistics.In the DeepSort tracking algorithm,the Kalman filter(KF),which is only suitable for linear problems,is replaced by the extended Kalman filter(EKF),which can effectively solve nonlinear problems and integrate the Histogram of Oriented Gradient(HOG)of the target.The multi-target tracking framework was constructed with YOLO V5 target detection algorithm.An efficient and longrunning Traffic Flow Statistical framework(TFSF)is established based on the tracking framework.Virtual lines are set up to record the movement direction of vehicles to more accurate and detailed statistics of traffic flow.In order to verify the robustness and accuracy of the traffic flow statistical framework,the traffic flow in different scenes of actual road conditions was collected for verification.The experimental validation shows that the accuracy of the traffic statistics framework reaches more than 93%,and the running speed under the detection data set in this paper is 32.7FPS,which can meet the real-time requirements and has a particular significance for the development of intelligent transportation. | Liang Mu Hong Zhao Yan Li Xiaotong Liu Junzheng Qiu Chuanlong Sun | 2021 | Computer Modeling in Engineering & Sciences2021，，11： | 1 |
| 3 | In vivo chondrogenesis of adult bone-marrow-derived autologous mesenchymal stem cells显示文摘 | Jinwu Chen Changyong Wang Shuanghong Lü Junzheng Wu Ximin Guo Cuimi Duan Lingzhi Dong Ying Song Junchuan Zhang Dianying Jing Linbo Wu Jiandong Ding Dexue Li | 2005 | Cell and Tissue Research2005，，3： | 1 |
| 4 | Improvement of rateand cycle performence by rapid polyaniline coating of a MWCNT/sulfur cathode 显示文摘 | Wu Feng Chen Junzheng Li Li | 2011 | Journal of Physical Chemis- try C2011，115，24： | 1 |
| 5 | Polyethylene‐Glycol‐Doped Polypyrrole Increases the Rate Performance of the Cathode in Lithium–Sulfur Batteries显示文摘 | Feng Wu Junzheng Chen Li Li Teng Zhao Zhen Liu Renjie Chen | 2013 | ChemSusChem2013，，8： | 1 |
| 6 | Autonomous Tracking Control for Four-Wheel Independent Steering Robot Based on Improved Pure Pursuit显示文摘Autonomous tracking control is one of the fundamental challenges in the field of robotic autonomous navigation,especially for future intelligent robots.In this paper,an improved pure pursuit control method is proposed for the path tracking control problem of a four-wheel independent steering robot.Based on the analysis of the four-wheel independent steering model,the kinematic model and the steering geometry model of the robot are established.Then the path tracking control is realized by considering the correlation between the look-ahead distance and the velocity,as well as the lateral error between the robot and the reference path.The experimental results demonstrate that the improved pure pursuit control method has the advantages of small steady-state error,fast response and strong robustness,which can effectively improve the accuracy of path tracking. | Jing Li Qingbin Wu Junzheng Wang Hui Qin Jiehao Li | 2020 | Journal of Beijing Institute of Technology2020，29，4： | 1 |
| 7 | Improvement of Rate and Cycle Performence by Rapid PolyanilineCoating of a MWCNT/Sulfur Cathode显示文摘 | Wu Feng Chen Junzheng Li Li | 2011 | Journal of Physical Chemistry C2011，115，24： | 1 |
| 8 | A novel method of fast dynamic optical image stabilization precision measurement based on CCD显示文摘 | Jing Li Junzheng Wang Shoukun Wang | 2011 | Optik- International Journal for Light and Electron Optics2011，122，07： | 1 |
| 9 | Efficacy and Safety of Dexamethasone Ointment on Recurrent Aphthous Ulceration显示文摘 | Chuanxia Liu Zengtong Zhou Guanjian Liu Qintao Wang Jiangang Chen Ling Wang Yongmei Zhou Guangying Dong Xueyi Xu Yuechun Wang Yiqing Guo Mei Lin Lan Wu Gefei Du Changlei Wei Xin Zeng Xiaoyi Wang Junzheng Wu Bingqi Li Gang Zhou Hongmei Zhou | 2012 | The American Journal of Medicine2012，，3： | 1 |
| 10 | Ultrathin Ni/V-layered double hydroxide nanosheets for efficient visible-light-driven photocatalytic nitrogen reduction to ammonia显示文摘Ammonia is important for industrial development and human life.The traditional Haber Bosch method converts nitrogen into ammonia gas at high temperatures and pressures,causing serious pollution and greenhouse gas emissions.These problems prompt the nitrogen fixation method to proceed in a sustainable way.Ultrathin Ni/V-layered double hydroxides(Ni/V-LDHs)nanosheets with different proportions were prepared successfully for photocatalystic reduction of nitrogen to ammonia,through aqueous miscible organic solvent method(AMO)to achieve the higher surface area and rich oxygen vacancies,containing more carriers and active sites to enhance nitrogen reduction.And the optimal catalyst of Ni/V-LDHs 11 AMO possesses the highest photocatalytic efficiency(176μmol·g^(-1)·h^(-1)),indicating its potential application prospects in catalyst fields.Consequently,this work achieves an environmentally friendly,low-cost and efficient conversion method for nitrogen reduction to ammonia through solar energy. | Xuefei Liu Yanmei Li Junzheng Zhang Jun Lu | 2021 | Nano Research2021，14，10： | 1 |
| 11 | Dual-quaternion-based satellite pose estimation and control with event-triggered data transmission显示文摘This paper proposes an event-triggered active disturbance rejection control framework to achieve the simultaneous position and attitude control of a satellite in proximity operations.Firstly,to facilitate the satellite motion description,we derive the relative kinematics and dynamics in terms of dual quaternions with the considerations of internal uncertainties and external disturbances.Then,two kinds of event-triggered mechanisms in the sensor/observer and controller/actuator channels are proposed to reduce the utilization of onboard communication resources and to improve control performance,respectively.The observation error and tracking error of both the attitude and orbit systems are theoretically proven to be asymptotically bounded.Finally,the simulation results show that the proposed method can achieve simultaneous position and attitude tracking between target and chaser satellites with satisfactory control performance and reduced communication rates. | LI ChunHui ZOU HengGuang SHI DaWei SONG JiLiang WANG JunZheng | 2023 | Science China(Technological Sciences)2023，66，5： | 0 |
| 12 | Dynamic image stabilization precision test system based on the Hessian matrix显示文摘Dynamic image stabilization precision of an optical image-stable device is a key technical indicator.Therefore,a fast dynamic image stabilization precision test system for an optical image-stable device is developed.A large-aperture collimator with a designed cross divisional board is used to simulate the infinity goal.The image-stable device is installed on the motion simulator with six degrees of freedom which is used to simulate the moving state of the device.The CCD camera installed behind the eyepiece lens of the image-stable device acquires images rapidly and in real time.The local energy maxima center of the cross light spot can be acquired accurately through the proposed algorithm using the Hessian matrix.In addition,to deal with the CCD non-uniformity,an adaptive non-uniformity correction algorithm based on bi-dimensional empirical mode decomposition is provided.The actual test results for the proposed method show that the test error of dynamic image stabilization is less than 0.7,and the time for the frame image acquisition and processing is less than 10 ms,which demonstrates the effectiveness of the test system. | LI Jing WANG JunZheng WANG ShouKun MA LiLing SHEN Wei | 2012 | Science China(Information Sciences)2012，55，9： | 0 |
| 13 | Effects of Transplanting Date on Growth, Development, Yield and Quality of Flue-cured Tobacco in Western Henan显示文摘With Yunyan 87 as an experimental material, the effects of different transplanting dates on the growth and development of tobacco plants and the yield and quality of cured tobacco leaves were studied in Lingbao City, Sanmenxia City. With the postponement of transplanting date, the growth period in field was prolonged, and the plant height and leaf area both increased at first and decreased then. TMV, weather fleck and brown spot all showed an incidence and a disease index decreased with the postponement of transplanting date. The total sugar and reducing sugar contents of the cured tobacco leaves from the upper and middle part increased at first and decreased then with the postponement of transplanting date. The main nitrogenous compounds decreased at first and increased then. The economic traits and leaf class were on the decrease. | Junzheng LI Haiyang JIANG Jun HU Chunmiao QI Xiangguo CHENG Weiwei WANG Yulin ZHANG | 2019 | Agricultural Biotechnology2019，8，2： | 0 |
| 14 | YBa_(2)Cu_(3)O_(7-x) Superconducting Thin Films Grown on CaNdA1O_(4)(100) Substrates显示文摘We report the fabrication of high temperature superconducting YBa_(2)Cu_(3)O_(7-x) thin films on CaNdA1O_(4)(100) substrate by pulsed laser deposition.Films have excellent features.X-ray diffraction patterns show that thin films are epitaxial with c-axis orientation normal to the surface of su bstrate.The four-terminal measurements indicate the zero resistance temperature of 92.1 K,and transition width of 0.7K,the critical current density of 3×10^(6)A/cm^(2)at 77K and under zero magnetic field. | XU Shifa ZHOU Yueliang LÜHuibin CUI Dafu CHEN Zhenghao YANG Guozhen TIAN Yongjun LIU Junzheng LI Lin CHANG Yingchuan HOU Desen FAN Hui ZHANG Zuren | 1994 | Chinese Physics Letters1994，11，5： | 0 |
| 15 | Stuxnet介导多梳蛋白在发育过程中降解的新机制显示文摘多梳蛋白复合体通过在表观遗传层面抑制发育相关基因的表达,从而确保发育程序的时空次序性调控。目前表观遗传学研究大多集中于探究下游靶基因和组蛋白修饰,但是多梳蛋白自身的活性以及多梳蛋白复合体的稳态如何被调控尚不清楚。 | Juan Du Junzheng Zhang Tao He Yajuan Li Ying Su Feng Tie Min Liu Peter J.Harte 朱健 | 2017 | 科学新闻2017，19，4： | 0 |
| 16 | Factors in?uencing the somatic cell nuclear transfer ef?ciency in pigs显示文摘Using a data set from our laboratory, we assessed the effects of several factors on pig cloning ef?ciency. The results demonstrated that cells at high con?uence( > 90%) used as donor cell resulted in higher pregnancy rate, delivery rate and overall cloning ef?ciency(number of live offspring born per reconstructed embryo transferred to recipients) compared with the cells at 60% to79% con?uence and 80% to 89% con?uence. Cells with four, ?ve and six passages compromised the pregnancy and delivery rates compared with ?rst passage cells. The number of blastocysts transferred by somatic cell nuclear transfer(SCNT) did not signi?cantly affect the cloning ef?ciency, but transfer of blastocyst derived from in vitro culture 5 d after SCNT achieved a signi?cantly higher pregnancy rate compared with one to two cell SCNT embryos from overnight culture. The highest pregnancy rate, delivery rate and the largest litter size were obtained when Bama Miniature pig ?broblasts were used as donor cells and Landrace/Yorkshire hybrid gilts were used as recipients. Recipients treated with chemicals for estrus synchronization had higher pregnancy rates compared with untreated recipients. Our data might be helpful for improving SCNT ef?ciency in pigs. | Yong JIN Manling ZHANG Xinrong JU Shuang LIANG Qiang XIONG Lihua ZHAO Xiaowei NIE Daorong HOU Qiang LIU Junzheng WANG Chenyu WANG Xiaokang LI Lining ZHANG Xiaorui LIU Ying WANG Haiyuan YANG Yifan DAI Rongfeng LI | 2019 | Frontiers of Agricultural Science and Engineering2019，6，1： | 0 |
| 17 | Lightweight Network Ensemble Architecture for Environmental Perception on the Autonomous System显示文摘It is important for the autonomous system to understand environmental information.For the autonomous system,it is desirable to have a strong generalization ability to deal with different complex environmental information,as well as have high accuracy and quick inference speed.Network ensemble architecture is a good choice to improve network performance.However,it is unsuitable for real-time applications on the autonomous system.To tackle this problem,a new neural network ensemble named partial-shared ensemble network(PSENet)is presented.PSENet changes network ensemble architecture from parallel architecture to scatter architecture and merges multiple component networks together to accelerate the inference speed.To make component networks independent of each other,a training method is designed to train the network ensemble architecture.Experiments on Camvid and CIFAR-10 reveal that PSENet achieves quick inference speed while maintaining the ability of ensemble learning.In the real world,PSENet is deployed on the unmanned system and deals with vision tasks such as semantic segmentation and environmental prediction in different fields. | Yingpeng Dai Junzheng Wang Jing Li Lingfeng Meng Songfeng Wang | 2023 | Computer Modeling in Engineering & Sciences2023，，1： | 0 |
| 18 | Event-Triggered Moving Horizon Pose Estimation for Spacecraft Systems显示文摘An event-triggered moving horizon estimation strategy is proposed for spacecraft pose estimation.The error dual quaternion is used to describe the system state and construct the spacecraft attitude-orbit coupled model.In order to reduce the energy consumption on spacecraft,an event-triggered moving horizon estimator(MHE)is designed for real-time pose estimation with limited communication resources.The model mismatch caused by event-triggered is finally solved by solving the cost function of the min-max optimization problem.The system simulation model is built in Matlab/Simulink,and the spacecraft pose estimation simulation is carried out.The numerical results demonstrate that the designed estimator could ensure the estimation effect and save spacecraft communication and computing resources effectively. | Shuangxi Li Hengguang Zou Dawei Shi Junzheng Wang | 2022 | Journal of Beijing Institute of Technology2022，31，4： | 0 |
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