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| 1 | Study of spatial distribution of sandy desertification in North China in recent 10 years显示文摘Sandy desertification is a land degradation characterized by wind erosion, mainly resulted from the excessive human activities in arid, semiarid and part of sub-humid regions in North China. It is one of main kinds of desertification/land degradation as well as water-soil erosion and salinization in China. Rapid and continuous spread of sandy desertification during last 50 years has created a major environmental and socio-economic problem in North China. Remote sensing monitored results in 2000 showed that the sandy desertified land area has been 38.57×104 km2. The area of potential to slightly sandy desertified land is 13.93×104 km2, moderately land 9.977×104 km2, severely land 7.909×104 km2 and very severely land 6.756×104km2. Sandy desertification mainly occurs in the semi-arid mixed farming-grazing zone and its northern rangeland zone, semi-arid dryland rainfed cropping zone and arid oasis-desert margin zone. The average annually developmental rate of sandy desertified land increased from 2,100tion in North China is 'overall deterioration, while local rehabilitation'. Already achieved rehabilitation results and monitoring assessment show that about 60% of desertified land in North China can be restored under the conditions of rational land-use ways and intensity. | WANG Tao, WU Wei, XUE Xian, SUN Qingwei & CHEN GuangtingKey Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China Department of Environment Engineering, Peking University, Beijing 100871, China | 2004 | Science China Earth Sciences2004，47，z1： | 28 |
| 2 | Rotary unmanned aerial vehicles path planning in rough terrain based on multi-objective particle swarm optimization显示文摘This paper presents a path planning approach for rotary unmanned aerial vehicles(R-UAVs)in a known static rough terrain environment.This approach aims to find collision-free and feasible paths with minimum altitude,length and angle variable rate.First,a three-dimensional(3D)modeling method is proposed to reduce the computation burden of the dynamic models of R-UAVs.Considering the length,height and tuning angle of a path,the path planning of R-UAVs is described as a tri-objective optimization problem.Then,an improved multi-objective particle swarm optimization algorithm is developed.To render the algorithm more effective in dealing with this problem,a vibration function is introduced into the collided solutions to improve the algorithm efficiency.Meanwhile,the selection of the global best position is taken into account by the reference point method.Finally,the experimental environment is built with the help of the Google map and the 3D terrain generator World Machine.Experimental results under two different rough terrains from Guilin and Lanzhou of China demonstrate the capabilities of the proposed algorithm in finding Pareto optimal paths. | XU Zhen ZHANG Enze CHEN Qingwei | 2020 | Journal of Systems Engineering and Electronics2020，31，1： | 20 |
| 3 | Control of switched systems with actuator saturation显示文摘This paper is concerned with controller synthesis for linear switched systems with actuator saturation. Based on common Lyapunov function technique and multiple-Lyapunov function technique, two methods for designing state feedback controller are proposed respectively in terms of linear matrix inequalities for the switched systems with saturation. An approach on enlarging the attractive domain is then investigated. The application of the presented approach is illustrated finally by a numerical example. | Yang SONG Zhengrong XIANG Qingwei CHEN Weili HU | 2006 | 控制理论与应用(英文版)2006，4，1： | 5 |
| 4 | Clinical efficacy of comprehensive therapy based on traditional Chinese medicine patterns on patients with pneumoconiosis: a pilot double-blind, randomized, and placebo-controlled study显示文摘Effective therapy options for pneumoconiosis are lacking.Traditional Chinese medicine(TCM)presents a favorable prospect in the treatment of pneumoconiosis.A pilot study on TCM syndrome differentiation can evaluate the clinical efficacy and safety of TCM and lay a foundation for further clinical research.A double-blind,randomized,and placebo-controlled trial was conducted for 24 weeks,in which 96 patients with pneumoconiosis were randomly divided into the control and treatment groups.Symptomatic treatment was conducted for the two groups.The treatment group was treated with TCM syndrome differentiation,and the control group was treated with placebo.The primary outcomes were the six-minute walking distance(6MWD)and the St.George Respiratory Questionnaire(SGRQ)score.The secondary outcomes were the modified British Medical Research Council Dyspnea Scale(mMRC),Chronic Obstructive Pulmonary Disease Assessment Test(CAT),Hospital Anxiety and Depression Scale(HADS),and pulmonary function.Only 83 patients from the 96 patients with pneumoconiosis finished the study.For the primary outcome,compared with the control groups,the treatment group showed a significantly increased 6MWD(407.90 m vs.499.51 m;95%confidence interval(CI)47.25 to 135.97;P<0.001)and improved SGRQ total score(44.48 vs.25.67;95%CI 27.87 to 9.74;P<0.001).The treatment group also significantly improved compared with the control group on mMRC score(1.4 vs.0.74;95%CI 1.08 to 0.23;P=0.003),CAT score(18.40 vs.14.65;95%CI 7.07 to 0.43;P=0.027),and the total symptom score(7.90 vs.5.14;95%CI 4.40 to 1.12;P<0.001).No serious adverse events occurred.This study showed that TCM syndrome differentiation and treatment had a favorable impact on the exercise endurance and quality of life of patients with pneumoconiosis. | Jiansheng Li Hulei Zhao Yang Xie Jieya Li Qingwei Li Xuexin Chen Weiyu Zhang | 2022 | Frontiers of Medicine2022，16，5： | 5 |
| 5 | State-target strategy:a bridge for the integration of Chinese and Western Medicine显示文摘The methods of Traditional Chinese Medicine(TCM)’s diagnosis and treatment have undergone several changes.It is crucial to build a proper model which is capable to modernize TCM into a both standardized and individualized treatment.Tong xiao-lin proposed the state-target strategy to build a bridge for the integration of Chinese and Western medicine.It is a model based on modern medical disease concepts and using the method of TCM to balance the pathological states and adopting the achievements of pharmacology of Chinese medicine to focus on the disease targets,symptom targets,and biochemical indicator targets.The reconstruction of TCM diagnosis and treatment system for diabetes is a good example to demonstrate this theory.It could improve the clinical efficacy,support the scientific research,and reinforce the standardization of TCM. | GOU Xiaowen GAO Zezheng YANG Yingying LI Qingwei TONG Xiaolin CHEN Keyu LEI Ye SONG Bin ZHAO Linhua | 2021 | Journal of Traditional Chinese Medicine2021，41，1： | 3 |
| 6 | The Intronic cis Element SE1 Recruits trans-Acting Repressor Complexes to Repress the Expression of ELONGATED UPPERMOST INTERNODE1 in Rice显示文摘 | Yongyao Xie Yaling Zhang Jingluan Han Jikai Luo Gousi Li Jianle Huang Haibin WU Qingwei Tian Qinlong Zhu Yuanling Chen Yoji Kawano Yao-Guang Liu Letian Chen | 2018 | Molecular Plant2018，11，5： | 3 |
| 7 | Progress in molecular-simulation-based research on the effects of interface-induced fluid microstructures on flow resistance显示文摘In modern chemical engineering processes, solid interface involvement is the most important component of process intensification techniques, such as nanoporous membrane separation and heterogeneous catalysis. The fundamental mechanism underlying interfacial transport remains incompletely understood given the complexity of heterogeneous interfacial molecular interactions and the high nonideality of the fluid involved. Thus, understanding the effects of interface-induced fluid microstructures on flow resistance is the first step in further understanding interfacial transport. Molecular simulation has become an indispensable method for the investigation of fluid microstructure and flow resistance. Here, we reviewed the recent research progress of our group and the latest relevant works to elucidate the contribution of interface-induced fluid microstructures to flow resistance.We specifically focused on water, ionic aqueous solutions, and alcohol–water mixtures given the ubiquity of these fluid systems in modern chemical engineering processes. We discussed the effects of the interfaceinduced hydrogen bond networks of water molecules, the ionic hydration of ionic aqueous solutions, and the spatial distributions of alcohol and alcohol–water mixtures on flow resistance on the basis of the distinctive characteristics of different fluid systems. | Yumeng Zhang Yudan Zhu AnranWang Qingwei Gao Yao Qin Yaojia Chen Xiaohua Lu | 2019 | Chinese Journal of Chemical Engineering2019，27，6： | 2 |
| 8 | Zhichan powder regulates nigrostriatal dopamine synthesis and metabolism in Parkinson's disease rats显示文摘In this study, rat models of Parkinson's disease induced by substantia nigra injection of 6-hydroxy-dopamine were intragastrically administered Zhichan powder daily for 50 days. Reverse transcription PCR results showed that tyrosine hydroxylase mRNA expression in the rat substantia nigra was significantly increased, while monoamine oxidase B mRNA expression was significantly decreased in the Zhichan powder group, compared with the model group. In addition, the levels of striatal dopamine and homovanillic acid, the ratio of dopamine to homovanillic acid, and the activity of blood superoxide dismutase were all higher in the Zhichan powder group than in the model group, but the content of malondialdehyde in blood was lower. Our experimental findings indicate that Zhichan powder has an antioxidant effect, it can regulate the expression of monoamine oxidase B and tyrosine hydroxylase in the substantia nigra of Parkinson's disease rats, and it can facilitate the secretion of striatal dopamine and its metabolite homovanillic acid. | Qingwei Zhou Jiajun Chen Shihong Yi Yongwei Lou Weimin Tang Yongmao Liu Pengguo Zhang | 2012 | Neural Regeneration Research2012，7，27： | 2 |
| 9 | Improved optimal steering law for SGCMG and adaptive attitude control of flexible spacecraft显示文摘The issue of attitude maneuver of a flexible spacecraft is investigated with single gimbaled control moment gyroscopes(SGCMGs) as an actuator. To solve the inertia uncertainty of the system, an adaptive attitude control algorithm is designed by applying a radial basis function(RBF) neural network. An improved steering law for SGCMGs is proposed to achieve the optimal output torque. It enables the SGCMGs not only to avoid singularity,but also to output more precise torque. In addition, global, uniform,ultimate bounded stability of the attitude control system is proved via the Lyapunov technique. Simulation results demonstrate the effectiveness of the new steering law and the algorithm of attitude maneuver of the flexible spacecraft. | Lu Wang Yu Guo Liping Wu Qingwei Chen | 2015 | Journal of Systems Engineering and Electronics2015，26，6： | 2 |
| 10 | Improved plasmid-based recovery of coxsackievirus A16 infectious clone driven by human RNA polymerase I promoter显示文摘Dear Editor,Coxsackievirus A16(CA16)is one of the major viral pathogens associated with hand,foot,and mouth disease.CA16 belongs to the Enterovirus genus of the Picornaviridae family and possesses a single-stranded positivesense RNA genome(Mao et al.,2014).Reverse genetics is an important tool for CA16 research.Previously,a reverse genetics T7 polymerase-based system was de- | xiaoli wang chaoyun shen tan chen ke lan zhong huang yunfang zhang qingwei liu | 2016 | Virologica Sinica2016，31，4： | 2 |
| 11 | Nonvolatile reconfigurable dynamic Janus metasurfaces in the terahertz regime显示文摘Metasurfaces,especially tunable ones,have played a major role in controlling the amplitude,phase,and polarization of electromagnetic waves and attracted growing interest,with a view toward a new generation of miniaturized devices.However,to date,most existing reconfigurable devices are bounded in volatile nature with sustained external energy to maintain and single functionality,which restrict their further applications.Here,we demonstrate for the first time,to our knowledge,nonvolatile,reconfigurable,and dynamic Janus metasurfaces by incorporating phase-change material Ge_(2)Se_(2)Te_(5)(GST)in the terahertz(THz)regime.First,we experimentally show the reversible switching characteristic of GST on large areas by applying a single nanosecond laser pulse,which exhibits excellent contrast of THz properties in both states.Then,we present a multiplex metasurface scheme.In each metasurface,three sets of structures are adopted,in which two sets integrate GST.The effective structures can be reversely modulated by the amorphization and crystallization of GST.As a proof of concept,the dynamic beam splitter,bifocal metalens,dual-mode focusing optical vortex generators,and switchable metalens/focusing optical vortex generators are designed,fabricated,and experimentally characterized,and can be switched reversibly and repeatedly with the help of optical and thermal stimuli.Our scheme will pave the way toward the development of multifunctional and compact THz devices and may find use for applications in THz imaging,sensing,and communications. | SHOUJUN ZHANG XIEYU CHEN KUAN LIU HAIYANG LI YUEHONG XU XIAOHAN JIANG YIHAN XU QINGWEI WANG TUN CAO ZHEN TIAN | 2022 | Photonics Research2022，10，7： | 2 |
| 12 | A quasi-3D Fano resonance cavity on optical fiber end-facet for high signal-to-noise ratio dip-and-read surface plasmon sensing显示文摘Surface plasmon devices mounted at the end-facets of optical fibers are appealing candidates for rapid and point-of-care sensing applications,by offering a special dip-and-read operation mode.At present,these devices’noise-equivalent limits-of-detection lag far behind the free-space counterparts,leaving them incapable of most biosensing applications.Here we report a quasi-3D Fano resonance cavity and its fabrication method to fundamentally improve the quality factor and coupling efficiency for fiber-coupled surface plasmon resonance.In this device,the Fano resonance combines the high coupling efficiency of a Fabry-Pérot etalon and the high quality factor resonance of a plasmonic crystal cavity.The quasi-3D device was fabricated on a planar substrate and transferred to a single-mode fiber end-facet,which requires a low-adhesion yet surface-plasmon-tunneling interface between the device and the planar substrate.Such an interface was realized with a nanocap-slit unit structure,of which the plasmonic crystal was consisted.A noise-equivalent limit of detection of~10-7 RIU was experimentally obtained,allowing bovine serum albumin physical adsorption to be distinguished at ng mL-1 level concentrations.Therefore,breaking through the long-standing signal-to-noise ratio bottleneck,this work makes fiber end-facet surface plasmon devices into one of high sensitivity label-free sensing technologies.At the same time,it provides an enabling top-down fabrication technology for making 3D plasmonic structures on fiber end-facets at the nanometer scale. | Xiaqing Sun Zeyu Lei Hao Zhong Chenjia He Sihang Liu Qingfeng Meng Qingwei Liu Shengfu Chen Xiangyang Kong Tian Yang | 2022 | Light(Advanced Manufacturing)2022，3，4： | 2 |
| 13 | A bio-inspired flight control strategy for a tail-sitter unmanned aerial vehicle显示文摘Wingbeat behavior and intermittent flight path are the two main characteristics of many birds.In this paper,to improve the efficiency of energy use and cruise range,a bio-inspired intermittent flight strategy with a whole flight envelope has applied to a tail-sitter aircraft.A total energy control system based transition control law has been proposed.The energy efficiency is investigated in terms of energy consumption per unit distance of different cruising modes,and the effectiveness and stability of proposed flight mode transition control law are verified by simulation.The mean mechanical power in flap-gliding flight is reduced compared with steady flight. | Bin ZHU Jianzhong ZHU Qingwei CHEN | 2020 | Science China(Information Sciences)2020，63，7： | 2 |
| 14 | Robust reliable control for uncertain switched nonlinear systems with time delay under asynchronous switching 显示文摘 | Xiang Zhengrong Chen Qingwei | 2010 | Applied Mathematics and Computation2010，216，3： | 1 |
| 15 | Detecting Non-Stationarity for Auscultation Signal of Traditional Chinese Medicine显示文摘The information about the nonstationarity of the aus-cultation signal is utilized in this paper to objectively and auto-matically identify healthy people and patients with qi-deficiency or yin-deficiency. In order to characterize the nonstationarity of the sound signal,the nonlinear cross-prediction method is used to extract features from the signal. A feature selection method based on conditional mutual information maximization criterion (CMIM) is implemented to find an optimal feature set. By means of the support vector machine (SVM) classifier,three common states (healthy,qi-deficiency and yin-deficiency) in traditional Chinese medicine are distinguished using the feature set,and a satisfactory classification accuracy of 80% is achieved in the experiment. In conclusion,the analysis based on the nonstationarity of the sound signal provides an alternative and outstanding approach to the objective auscultation of traditional Chinese medicine (TCM). | YAN Jianjun SHEN Qingwei WANG Yiqin LI Fufeng GUO Rui CHEN Chunfeng SHEN Yong | 2011 | Wuhan University Journal of Natural Sciences2011，16，1： | 1 |
| 16 | Characteristics of carotid artery disease (CAD) and presenting cerebrovascular symptoms in an aged group显示文摘 | Qingwei Chen Ying Liu Linlin Pei Dazhi Ke Guiqiong Li Wei Deng Wuwei Yao | 2009 | The International Journal of Cardiovascular Imaging2009，，2： | 1 |
| 17 | Reconfigurable and nonvolatile terahertz lithography-free photonic devices based on phase change films显示文摘High-performance terahertz(THz)devices with reconfigurable features are highly desirable in many promising THz applications.However,most of the existing reconfigurable THz elements are still limited to volatile responses,single functionality,and time-consuming multistep manufacturing procedures.In this paper,we report a lithography-free approach to create reconfigurable and nonvolatile THz components by exploring the reversible,nonvolatile,and continuous THz modulation capability of the phase change material Ge_(2)Sb_(2)Te_(5).As a proof of concept,THz gratings with significant Rayleigh anomalies and diffraction as well as ultrathin THz flat lenses with subwavelength and ultra-broadband focusing capabilities are designed and fabricated on ultrathin Ge_(2)Sb_(2)Te_(5)films using the presented photo-imprint strategy.Moreover,such a method can also be adopted to create more complex THz devices,such as Pancharatnam–Berry phase metasurfaces and grayscale holographic plates.With these findings,the proposed method will provide a promising solution to realize reconfigurable and nonvolatile THz elements. | XIEYU CHEN SHOUJUN ZHANG KUAN LIU YUEHONG XU XIAOHAN JIANG HAIYANG LI XI FENG QINGWEI WANG YONGCHANG LU KEMENG WANG TUN CAO ZHEN TIAN | 2023 | Photonics Research2023，11，4： | 1 |
| 18 | The Impact of Atmospheric Deposition of Cadmium on Dominant Algal Species in the East China Sea显示文摘Cadmium(Cd) mainly derived from anthropogenic emissions can be transported through atmospheric pathway to marine ecosystem,affecting the phytoplankton community and primary productivity.In this study,we identified the toxicity threshold of Cd for phytoplankton under seawater conditions of the coastal East China Sea(ECS) through both laboratory and in situ mesocosm incubation experiments.The mesocosm experiment showed that Cd in low concentration(0.003 μg per μg chl a) was conducive to the growth of natural community and increased chl a productivity.In high concentration(0.03 μg per μg chl a) Cd acted as an inhibiting factor which decreased the total chl a productivity.The diatom community was found to be more sensitive to Cd toxicity than dinoflagellate,as the low concentration Cd showed toxicity to diatom but enhanced dinoflagellate growth.We noticed that the soluble Cd estimated from atmosphere deposition to the coastal ECS was below the toxicity threshold and the Cd deposition might promote phytoplankton growth in this region.In our laboratory experiments,adding Cd,similar to aerosol deposition,stimulated the growth of both dominant algal species Prorocentrum donghaiense Lu(dinoflagellate) and Skeletonema costatum(diatom).Adding Cd on a higher level inhibited the growth of both the species,but Skeletonema costatum seemed obviously more sensitive to toxicity.This indicates the potential impact of atmospheric deposition Cd on phytoplankton community succession in the ECS. | QUAN Qiwei CHEN Ying MA Qingwei WANG Fujiang MENG Xi WANG Bo | 2016 | Journal of Ocean University of China2016，15，2： | 1 |
| 19 | On the anisotropic deformation of AZ31 Mg alloy under compression显示文摘 | Qingwei Dai Dingfei Zhang Xi Chen | 2011 | Materials and Design2011，，10： | 1 |
| 20 | Mechanisms of Pb(Ⅱ) coprecipitation with natrojarosite and its behavior during acid dissolution显示文摘Lead(Pb) coprecipitation with jarosite is common in natural and engineered environments,such as acid mine drainage(AMD) sites and hydrometallurgical industry. Despite the high relevance for environmental impact, few studies have examined the exact interaction of Pb with jarosite and the dissolution behavior of each phase. In the present work, we demonstrate that Pb mainly interacts with jarosite in four modes, namely incorporation, occlusion,physically mixing, and chemically mixing. For comparison, the four modes of Pb-bearing natrojarosite were synthesized and characterized separately. Batch dissolution experiments were undertaken on these synthetic Pb-bearing natrojarosites under pH_(2) to simulate the AMD environments. The introduction of Pb decreases the final Fe releasing efficiency of jarosite-type compounds from 18.18% to 3.45%-5.01%, showing a remarkable inhibition of their dissolution. For Pb releasing behavior, PbSO_(4) dissolves in preference to Pb-substituted natrojarosite, i.e.,(Na, Pb)-jarosite, which primarily results in the sharp increase of Pb releasing concentration(> 40 mg/L). PbSO_(4) occlusion by jarosite-type compounds can significantly reduce the release of Pb. The results of this study could provide useful information regarding Fe and Pb cycling in acidic natural and engineered environments. | Meiqing Shi Xiaobo Min Chen Tian Taixu Hao Sijie Zhu Yun Ge Qingwei Wang Xu Yan Zhang Lin | 2022 | Journal of Environmental Sciences2022，34，12： | 1 |
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