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Formation keeping control through inter-satellite electromagnetic force

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Science China(Technological Sciences) 2013年第5期56卷 1102-1111页

作者： CAI WeiWei YANG LePing ZHU YanWei zhang yuanwen College of Aerospace Science and Engineering National University of Defense Technology

Satellite formation keeping through inter-satellite electromagnetic force provides an attractive alternative for future space missions due to its distinct advantages of no propellant consumption or plume contamination as compared to conventional ***,the internal force nature as well as the high nonlinearity and coupling of electromagnetic force brings new control challenges for this novel *** this paper,analysis on the dynamics characteristics and special control issues in the presence of electromagnetic force is carried out on the basis of the derived relatively translational *** the model uncertainties,external disturbances and sensor noise,a combined nonlinear control scheme involving feed-forward and feedback control components is proposed for electromagnetic-force-based formation *** feed-forward component is directly obtained through desired configuration and dynamics under nominal conditions while the feedback component is realized utilizing active disturbance rejection control methodology with some reasonable *** simulation is presented to verify the feasibility and validity of the combined control scheme.

关键词： inter-satellite electromagnetic force formation keeping dynamics analysis active disturbance rejection nonlinear control

Strategies for improving the lithium-storage performance of 2D nanomaterials

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National Science Review 2018年第3期5卷 389-416页

作者： Jun Mei yuanwen zhang Ting Liao Ziqi Sun Shi Xue Dou School of Chemistry Physics and Mechanical Engineering Queensland University of Technology Institute of Superconducting and Electronic Materials University of Wollongong

2D nanomaterials, including graphene, transition metal oxide(TMO) nanosheets, transition metal dichalcogenide(TMD) nanosheets, etc., have offered an appealing and unprecedented opportunity for the development of high-performance electrode materials for lithium-ion batteries(LIBs). Although significant progress has been made on 2D nanomaterials for LIB applications in the recent years, some major challenges still exist for the direct use of these sheet-like nanomaterials, such as their serious self-agglomerating tendency during electrode fabrication and low conductivity as well as the large volume changes over repeated charging–discharging cycles for most TMOs/TMDs, which have resulted in large irreversible capacity, low initial Coulombic efficiency and fast capacity fading. To address these issues,considerable progress has been made in the exploitation of 2D nanosheets for enhanced lithium storage. In this review, we intend to summarize the recent progress on the strategies for enhancing the lithium-storage performance of 2D nanomaterials, including hybridization with conductive materials, surface/edge functionalization and structural optimization. These strategies for manipulating the structures and properties of 2D nanomaterials are expected to meet the grand challenges for advanced nanomaterials in clean energy applications and thus provide access to exciting materials for achieving high-performance next-generation energy-storage devices.

关键词： 2D nanomaterials lithium-ion batteries graphene energy-storage devices

A Case Study on MJO Energy Transport Path in a Local Multi-scale Interaction Framework

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Advances in Atmospheric Sciences 2021年第11期38卷 1929-1944页

作者： yuanwen zhang Guiwan CHEN Jian LING Shenming FU Chongyin LI State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric Physics(IAP)Chinese Academy of Sciences(CAS)Beijing 100029China University of Chinese Academy of Sciences(UCAS) Beijing 100049China International Center for Climate and Environment Sciences(ICCES) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

A new local kinetic energy(KE)budget for the Madden−Julian Oscillation(MJO)is constructed in a multi-scale *** energy budget framework allows us to analyze the local energy conversion processes of the MJO with the high-frequency disturbances and the low-frequency background *** KE budget analysis is applied to a pronounced MJO event during the DYNAMO field campaign to investigate the KE transport path of the *** work done by the pressure gradient force and the conversion of available potential energy at the MJO scale are the two dominant processes that affect the MJO KE *** MJO winds transport MJO KE into the MJO convection region in the lower troposphere while it is transported away from the MJO convection region in the upper *** energy cascade process is relatively weak,but the interaction between high-frequency disturbances and the MJO plays an important role in maintaining the high-frequency disturbances within the MJO *** MJO KE mainly converts to interaction KE between MJO and high-frequency disturbances over the area where the MJO zonal wind is *** interaction KE over the MJO convection region is enhanced through its flux convergence and further transport KE to the high-frequency *** process is conducive to maintaining the MJO *** study highlights the importance of KE interaction between the MJO and the high-frequency disturbances in maintaining the MJO convection.

关键词： Madden−Julian Oscillation energy budget multi-scale interaction energy cascade kinetic energy

Study on the Style of Urban Development as a Center of Kitakyushu Monorail —About the User Actual Situation and the Demographic around the Station

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Open Journal of Civil Engineering 2014年第4期4卷 318-327页

作者： yuanwen zhang Hiroatsu Fukuda Tianyi Yu Faculty of Environmental Engineering University of Kitakyushu Kitakyushu Japan School of Architecture and Fine Art Dalian University of Technology Dalian China

The ageing of the population in Japan has become a problem. According to the research of different regions, where the ratio of the ageing population is above 25%, it is found that the Japanese society is gradually turned to hyper-aged society. The population along Kitakyushu monorail is also in such a situation. This study is based on the background, with excessive reliance on their own vehicles and public transport problems arising from the abolition of public transportation in Kitakyushu as the area of this study. Under the full consideration of people who can’t drive, the elderly who had to take buses as well as people who lack of transport ability where population decrease and the aging problem have been worsening, their surrounding environment should be further improved. In addition, it should be taken into consideration to increase the population in the walking distance around the stations.

关键词： Monorail Population Hyper-Aged Society Aging Ratios

Effectiveness and safety of Xuefu Zhuyu oral liquid(血府逐瘀口服液)on Qi-stagnation and blood-stasis pattern in patients with stable angina,tension-type headache and primary dysmenorrhea:rationale and design of a master protocol

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Journal of Traditional Chinese Medicine 2023年第4期43卷 815-823页

作者： CAO Wencong LIAO Shaojun zhang yuanwen ZHOU Li LI Geng OUYANG Wenwei WEN Zehuai Second Clinical Medical College(Second Affiliated Hospital) Guangzhou University of Chinese MedicineGuangzhou 510405China First Clinical Medical College(First Affiliated Hospital) Guangzhou University of Chinese MedicineGuangzhou 510405China Key Unit of Methodology in Clinical Research Guangdong Provincial Hospital of Chinese MedicineGuangzhou 510120China State Key Laboratory of Dampness Syndrome of Chinese Medicine Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510120China Science and Technology Innovation Center Guangzhou University of Chinese MedicineGuangzhou 510405China

We present the rationale and design of a master protocol study that clarifies the effectiveness and safety of Chinese herbal formulas on Qi-stagnation and blood-stasis pattern(QBP).Three randomized controlled trials(RCTs)and real-world observational *** on three registry cohorts of stable angina,tension-type headache and primary dysmenorrhea,patients with QBP will be enrolled in RCTs to receive either Xuefu Zhuyu(血府逐瘀,XFZY)oral liquid or a placebo,while patients with non-QBP will be enrolled in the observational studies and experience follow-up.1414 patients(RCTs:574;observational studies:840)will be recruited at seven centers in China over a 3-year *** primary outcome is the visual analog scale of pain *** events will also be *** analysis will be undertaken separately in each sub-study,and then an overall analysis combining multiple subgroups will be performed to comprehensively investigate the effect of XFZY oral *** study will provide high-quality evidence of XFZY oral liquid for QBP patients and show a paradigm of post-marketing evaluation of the effectiveness and safety for Chinese medicine following the notion of the pattern dominating different disease research models.

关键词： angina stable tension-type headache primary dysmenorrhea Chinese herbal formula Chinese medicine pattern master protocol

Theoretical modeling of eddy current magnetic field and magnetic field measurement array topology methods

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Theoretical modeling of eddy current magnetic field and magn...

第40届中国控制会议

作者： Zhu Haokui zhang yuanwen Huang Huan National University of Defense Technology

It is imperative to study towing deorbit technology because that invalid spacecraft occupy orbital resources and threaten other operational *** invalid spacecraft generally ratates at high speed,so that the despun is the first step of being towed away from *** present,electromagnetic despun technology has been widely concerned for its advantages such as non-contact control,no plume contamination and no fuel ***,the precise measurement technology of eddy current magnetic field still needs to be *** on the background of spacecraft electromagnetic despun,The theoretical modeling and measurement techniques of eddy current magnetic field for invalid spacecraft are studied in this ***,the equivalent model of eddy current magnetic field is derived for the spherical ***,aiming at the design of eddy current magnetic field measurement array,summarize the three principles of measuring point selection and propose a universally applicable determination method of magnetic measurement *** simple ground device and verify the magnetic measurement array method with the test *** analysis and experimental results show that this method is effective,and can be applied to spacecraft electromagnetic eddy current magnetic field measurement,and can provide a reference for the design of other magnetic field measurement.

关键词： Electromagnetic despun Magnetic field modeling Magnetic field measurement Measurement array

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A型肉毒毒素治疗慢性鼻炎的研究进展

临床耳鼻咽喉头颈外科杂志 2022年第11期36卷 878-883页

作者：张元文王桂芳中国人民解放军联勤保障部队第926医院烧伤整形科云南开远661600 中国人民解放军联勤保障部队第926医院耳鼻咽喉头颈外科云南开远661600

肉毒毒素是由肉毒梭菌产生的神经毒素超家族,通过抑制突触前神经末梢神经递质的释放,干扰神经肌肉和神经腺体接头处的信号传递,已广泛用于神经肌肉、腺体分泌过多和自主神经系统疾病。近年来,A型肉毒毒素被用于治疗慢性鼻炎。研究表明A... 详细信息

肉毒毒素是由肉毒梭菌产生的神经毒素超家族,通过抑制突触前神经末梢神经递质的释放,干扰神经肌肉和神经腺体接头处的信号传递,已广泛用于神经肌肉、腺体分泌过多和自主神经系统疾病。近年来,A型肉毒毒素被用于治疗慢性鼻炎。研究表明A型肉毒毒素鼻腔给药安全有效,可以减轻患者的鼻部症状,并且效果持久。本文对A型肉毒毒素治疗慢性鼻炎的研究进展进行综述。

关键词：鼻炎肉毒毒素鼻腔给药

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烧伤后瘙痒的机制和治疗研究进展

中华烧伤与创面修复杂志 2023年第7期39卷 690-694页

作者：陈梦佳张元文解放军联勤保障部队第926医院神经内科开远661600 解放军联勤保障部队第926医院烧伤整形科开远661600

瘙痒是烧伤后的常见症状之一,严重影响着烧伤患者的创面愈合和生活质量,但其诊治常常被忽视。烧伤后瘙痒的病理生理机制尚未被阐明,目前认为主要由神经病源性因素导致;烧伤后瘙痒的标准评估方法和治疗方案尚未形成共识。该文就烧伤后瘙... 详细信息

瘙痒是烧伤后的常见症状之一,严重影响着烧伤患者的创面愈合和生活质量,但其诊治常常被忽视。烧伤后瘙痒的病理生理机制尚未被阐明,目前认为主要由神经病源性因素导致;烧伤后瘙痒的标准评估方法和治疗方案尚未形成共识。该文就烧伤后瘙痒的病理生理机制、病情评估、治疗的相关研究进展进行综述。

关键词：烧伤瘙痒症机制病情评估治疗

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面部毛孔粗大的治疗进展

中华皮肤科杂志 2019年第11期52卷 852-855页

作者：张元文潘文东解放军联勤保障部队第九二六医院烧伤整形外科云南开远661600

面部毛孔粗大是一个常见的皮肤问题,其发生主要与皮脂分泌旺盛、皮肤老化(皮肤弹性松弛)以及毛囊体积增大等因素有关,目前的治疗主要针对这些因素.本文回顾总结了目前常用的治疗方法,包括口服抗雄激素药、局部外用维A酸类药物、化学剥... 详细信息

面部毛孔粗大是一个常见的皮肤问题,其发生主要与皮脂分泌旺盛、皮肤老化(皮肤弹性松弛)以及毛囊体积增大等因素有关,目前的治疗主要针对这些因素.本文回顾总结了目前常用的治疗方法,包括口服抗雄激素药、局部外用维A酸类药物、化学剥脱术以及激光、射频、聚焦超声等光电治疗,而光电设备的不断发展提供了更新、更可靠的选择.

关键词：毛囊皮脂腺皮肤衰老毛孔粗大治疗