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Integration of a Nonlinear Vibration Absorber and Levitation Magnetoelectric Energy Harvester for Whole-Spacecraft Systems

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Acta Mechanica Solida Sinica 2019年第3期32卷 298-309页

作者： Ye-Wei Zhang Zhi-Wei fang Shi-Lei wang Zhi-Yu Ni jian Zang Bo fang College of Aerospace Engineering Shenyang Aerospace University Shenyang 110136 China Shanghai Prime Machinery Company Limited Shanghai 200072 China

This paper presents a new device integrating a nonlinear vibration absorber with a levitation magnetoelectric energy harvester for whole-spacecraft systems. This device effectively reduces vibration and has a stronger energy harvesting capability than the existing systems. It harvests energy from a wide frequency range and has a high output voltage. The harvested energy is determined by magnetic field strength, excitation frequency, and resistive load. The change in the magnetic field strength has the least impact on the output voltage. The vibration reduction effects and harvested energy of the system are analyzed with an approximate analytical method that combines the harmonic balance approach and the pseudo-arclength continuation algorithm. The results of the Runge-Kutta method are nearly consistent with those of the approximate analytical method. Moreover, the effects of the excitation frequency, resistive load, and parameters of the nonlinear energy sink on the system vibration response and energy harvesting are analyzed.

关键词： Levitation magnetoelectric energy harvester Whole spacecraft Nonlinear energy sink Vibration reduction

Congenital ocular counter-roll:a review of cases treated exclusively by ophthalmologists

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International Journal of Ophthalmology(English edition) 2021年第7期14卷 1073-1080页

作者： Bin-Bin Zhu fang wang jian-Hua Yan The State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangzhou 510060Guangdong ProvinceChina

AIM:To review the demographics,clinical manifestations,and surgical experiences of patients with congenital ocular counter-roll,whose treatments were performed exclusively by ***:A retrospective review was conducted consisting of patients who received strabismus surgery between 2017 to *** with obvious ocular counter-roll were ***:A total of 7008 patients who received strabismus surgery,28(12 males,16 females)were diagnosed as congenital ocular counter-roll,accounting for 0.40%.All patients were initially misdiagnosed:21 patients were misdiagnosed as superior oblique palsy(SOP),3 as inferior oblique overaction,2 as dissociated vertical deviation(DVD),1 as superior oblique overaction with A-pattern exotropia,and 1 as medial rectus *** mean±SD age was 12.4±9.4 y(range 2.5-36 y).The most common clinical findings included ocular counter-roll,vertical deviation or vertical deviation combined with outward deviation and head *** follow-up,an excellent surgical result was achieved in 20 *** horizontal deviation of 26±24 prism diopter(PD)and vertical deviation of 18±12 PD were reduced to 0±12 PD(P=0.0001)and 3±4 PD(P=0.001),***:Congenital ocular counter-roll is a rare supranuclear vertical strabismus caused by congenital abnormalities involving vestibule-ocular reflex *** addition to ocular counter-roll,the most salient clinical features included,but are not limited to,hyperdeviation,outward deviation,overelevation in adduction and head tilt.

关键词： congenital ocular counter-roll skew deviation cyclovertical strabismus

A Dairy Industry Information Cooperative Service System Based on a Production Process Ontology

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Journal of Integrative Agriculture 2012年第5期11卷 839-848页

作者： XU Yong NIU fang-qu Luke Bergmann wang Zhi-qiang wang jian Key Laboratory of Regional Sustainable Development Modeling Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 P.R.China Department of Geography University of Minnesota Minneapolis MN 55455 United States of America Institute of Agricultural Information Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China

Agricultural information cooperative services （AICS） are now becoming an important aspect of agriculture informatization. This study offers an ontological conception of the agricultural production process, establishing operational divisions corresponding to both the stages and the fundamental information requirements of the dairy industry production process in China, yielding a process ontology for the dairy industry as well as a business chain model. A framework for a dairy industry information cooperative service system was established, with service functions realized in a prototype system. The resulting agricultural process ontology built on the basis of biological characteristics has advantages as a classification standard for agricultural information; whereas the business chain model based on this agricultural process ontology allows for an effective distribution of agricultural information cooperative services. This study outlines a concept and demonstrates a prototype of a cooperative service capable of integrating diverse online agricultural information relevant to the dairy industry in China.

关键词： agricultural information ontology dairy industry cooperative service agricultural informatization

Applications of electrospun nanofibers

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Chinese Science Bulletin 2008年第15期53卷 2265-2286页

作者： fang jian NIU HaiTao LIN Tong wang XunGai Centre for Material and Fibre Innovation Deakin University Geelong VIC 3217 Australia

Polymeric nanofiber non-woven materials produced by electrospinning have extremely high sur-face-to-mass (or volume) ratio and a porous structure with excellent pore-interconnectivity. These characteristics plus the functionalities and surface chemistry of the polymer itself impart the nanofi-bers with desirable properties for a range of advanced applications. This review summarizes the recent progress in electrospun nanofibers, with an emphasis on their applications.

关键词：电子纳米纤维电子针一维材料应用软件

Ion-implanted Mechanism of the Deposition Process for Diamond-Like Carbon Films

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Chinese Physics Letters 2011年第1期28卷 149-152页

作者： wang Xue-Min WU Wei-Dong wang Yu-Ying wang Hai-Ping GE fang-fang TANG Yong-jian JU Xin Research Center of Laser Fusion China Academy of Engineering Physics Mianyang 621900 Department of Physics University of Science-and Technology BeijingBeijing 100083

Due to the local densification, high-energy C and doped ions can greatly affect the bonding configurations of diamond-like carbon films. We investigate the corresponding affection of different incident ions with energy from 10eV to 600eV by Monte Carlo methods. The ion-implanted mechanism called the subplantation （for C, N, O, W, Y, etc.） is confirmed. Obvious thermal effect could be induced by the subplantation of the incident ions. Further, the subplantation of C ions is proved by in situ reflection high energy electron diffraction （RHEED）. The observation from an atomic force microscope （AFM） indicates that the initial implantation of C ions might result in the final primitive-cell-like morphology of the smooth film （in an area of 1.2 mm× 0.9 mm, rms roughness smaller than 20 nm by Wyko）.

关键词： Surfaces interfaces and thin films

Energy Method in Stretch Reducing Process of Steel Tube

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Journal of Iron and Steel Research International 2008年第6期15卷 39-43页

作者： ZHANG fang-ping SUN Bin-yu wang jian-mei Shanxi Provincial Modern Rolling Engineering Center Taiyuan University of Science and Technology Taiyuan 030024 Shanxi China

According to the theories for stretch reducing process and steel tube plastic deformation, the energy method was used to mesh the rolled deformation zone of the steel tube into the upper limit elements, and an admissible velocity field was constructed to deduce a series of formulas of the inner virtual power consumption of deformed bodies. The roiling force during the stretch reducing process could be obtained by optimizing the upper limit power, which could provide guidelines for a proper choice of the stretch reducing process and devices for steel tube companies, as well as new products and devices.

关键词： upper limit power rolling force velocity field

Immunotherapeutic strategies targeting B cell maturation antigen in multiple myeloma

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Military Medical Research 2021年第3期8卷 433-443页

作者： Yi fang jian Hou Department of Hematology Renji HospitalSchool of MedicineShanghai Jiao Tong University160 Pujian RoadShanghai 200127China

Multiple myeloma(MM) is the second most common hematologic malignancy, and is characterized by the clonal expansion of malignant plasma cells. Despite the recent improvement in patient outcome due to the use of novel therapeutic agents and stem cell transplantation, all patients eventually relapse due to clone evolution. B cell maturation antigen(BCMA) is highly expressed in and specific for MM cells, and has been implicated in the pathogenesis as well as treatment development for MM. In this review, we will summarize representative anti-BCMA immune therapeutic strategies, including BCMA-targeted vaccines, anti-BCMA antibodies and BCMA-targeted CAR cells. Combination of different immunotherapeutic strategies of targeting BCMA, multi-target immune therapeutic strategies, and adding immune modulatory agents to normalize anti-MM immune system in minimal residual disease(MRD) negative patients, will also be discussed.

关键词： B cell maturation antigen Multiple myeloma Vaccine Antibody CAR T-cells

The Analysis on the Candidate Frequency Bands of Future Mobile Communication Systems

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China Communications 2015年第S1期12卷 140-149页

作者： TAN Haifeng LI Wei wang Tan fang jian FENG Zhiyong Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications The State Radio Monitoring Center(The State Radio Spectrum Management Center)

Appropriate candidate frequency bands are extremely important for the development of future 5G systems. In this work, the researches on 5G spectrum around the world are summarized. Then the potential candidate frequency bands for 5G systems are investigated based on practical utilization of spectrum in China. For spectrum below 6GHz, the feasibility of possible frequency bands for 5G system are analyzed, which mainly come from 2G/3G/4G spectrum re-farming, the spectrum identified by footnotes for IMT systems in Regulations on the Radio Frequency Allocation of China, and potential candidate bands from WRC-15 Agenda Item 1.1. Moreover, propagation characteristics of WRC-15 candidate frequency bands proposed by China are measured and modeled to verify their effectiveness. For spectrum above 6GHz, the potential candidate frequency bands for 5G systems are selected based on the preliminary analysis of spectrum allocation, allotment and the current usage in China. Suggestions are provided for further studies on 5G spectrum.

关键词： IMT system 5G spectrum mobile service candidate frequency band 6GHz

Temporal changes in circulating P-selectin,plasminogen activator inhibitor-1,magnesium,and creatine kinase after percutaneous coronary intervention

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第8期11卷 575-582页

作者： Shu-qin YING Mei-xiang XIANG Lu fang jian-an wang Department of Cardiology Hangzhou 310009 China) Cardiovascular Key Lab of Zhejiang Province the Second Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310009 China Baker IDI Heart and Diabetes Institute Melbourne Victoria 3004 Australia

Objective： This study aims to determine the mechanisms underlying restenosis and ischemia-reperfusion injury of the myocardium after percutaneous coronary intervention （PCI）. Methods： The present study examined serial changes （5 min, 30 min, 2 h, 6 h, and 24 h after PCI） in circulating P-selectin, plasminogen activator inhibitor-1 （PAl-l）, magnesium （Mg）, and creatine kinase-myocardial band fraction （CK-MB） levels, which may be associated with restenosis and myocardial injury in patients undergoing PCI. The occurrence rates of major adverse cardiovascular events were collected over a six-month follow-up. Results： PCI induced an early elevation of P-selectin, which cor- related positively with the inflation pressure used in the PCI procedure. PCI also caused a significant and sustained decrease in serum Mg in PCI patients, without an effect on PAI-I. An increase in CK-MB was observed in PCI patients, although values were within normal reference range. In addition, elevated P-selectin and decreased Mg measured shortly after the coronary angioplasty procedure were associated with recurrent treatment and heart failure, respec- tively. Conclusions： Our study demonstrates that PCI induces temporal changes of P-selectin, Mg, and CK-MB, which may be involved in restenosis and ischemia-reperfusion injury. These findings highlight the need for using antiplatelet therapy and Mg to reduce the risks associated with PCI.

关键词： Percutaneous coronary intervention Restenosis Ischemia-reperfusion injury P-selectin Magnesium