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Stiffness of Postural Alignment System Based on 3-Axis Actuators for Large Aircraft Components

Chinese Journal of Mechanical Engineering 2010年第4期23卷 524-531页

作者： GUO Zhimin jiang Junxia ke Yinglin The State key Lab of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

Aircraft digital flexible assembly fixture and technologies are widely used in developed countries, while the traditional jig-based assembly mode is still used in China. The application study of aircraft digital flexible assembly system is just beginning in our country recently. To meet the requirements of automated posture alignment and join in digital assembly system for large aircraft components, a novel fitting fixture called 3-axis actuator is developed. On the basis of the actuators, three kinds of posture alignment system for large aircraft components are proposed, including the non-redundant system, the redundant actuating system, and the redundant leg system, and their constitutions and properties are introduced. Through deriving the feeding transmission stiffness model of single actuator and analyzing the inverse kinematics of these systems, the relationship between the external force and the changes of position and orientation of large aircraft component is obtained, and then the postural alignment stiffness models are established. With the method mentioned above, the postural alignment stiffness of three systems is computed by using the algebraic formulate, and the results show that redundant properties can increase system＇s postural alignment stiffness. As an example, a optimized layout of the assembly system for a given model of aircraft is developed, the results of application show that the layout has many advantages, such as high accuracy, stiffness, stability, reliability, efficiency and flexible, which can satisfy the requirement of aircraft digital assembly system well. The proposed study of postural alignment stiffness for different systems can supply the theoretic support for the optimization layout design of aircraft digital assembly system, and contribute to evaluate the system working performance of systems.

关键词： 3-axis actuator large aircraft component redundant postural alignment stiffness posture-holding

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A pilot-scale study of cryolite precipitation from high fluoride-containing wastewater in a reaction-separation integrated reactor

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Journal of Environmental Sciences 2013年第7期25卷 1331-1337页

作者： ke jiang Kanggen Zhou Youcai Yang Hu Du School of Metallurgical Science and Engineering Central South University

Fluoride removal by traditional precipitation generates huge amounts of a water-rich sludge with low quality, which has no commercial or industrial value. The present study evaluated the feasibility of recovering fluoride as low water content cryolite from industrial fluoride-containing wastewater. A novel pilot-scale reaction-separation integrated reactor was designed. The results showed that the seed retention time in the reactor was prolonged to strengthen the induced crystallization process. The particle size of cryolite increased with increasing seed retention time, which decreased the water content. The recovery rate of cryolite was above 75% under an influent fluoride concentration of 3500 mg/L, a reaction temperature of 50°C, and an influent flow of 40 L/hr. The cryolite products that precipitated from the reactor were small in volume, large in particle size, low in water content, high in crystal purity, and recyclable.

关键词： fluoride-containing wastewater cryolite crystallization low water content reaction-separation integrated reactor

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1.5 ℃ target： Not a hopeless imagination

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Advances in Climate Change Research 2018年第2期9卷 93-94页

作者： jiang ke-Jun Energy Research Institute National Development and Reform Commission Beijing 100038 China

With the proposal on 1.5 ℃ from Paris Agreement, many studies were launched to understand the various effects linking with this target, including climate science, impact, adaption, and mitigation pathway. Compared with 2 ℃ target, mitiga- tion pathway for the 1.5 ℃ was given special focus. There are several international research projects made efforts on this including ADVANCE, CDLINK, EMF33 etc.

关键词：《巴黎协定》气候学发展现状气象知识

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Gasification kinetics of bulk coke in the CO2/CO/H2/H2O/N2 system simulating the atmosphere in the industrial blast furnace

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International Journal of Minerals,Metallurgy and Materials 2019年第10期26卷 1247-1257页

作者： Min-min Sun Jian-liang Zhang ke-jiang Li ke Guo Zi-ming Wang Chun-he jiang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China School of Chemical Engineering The University of QueenslandSt LuciaQLD 4072Australia Sinosplendor Engineering&Technology Co. Ltd.Tianjin 300452China

The gasification characteristics and gasification kinetics of coke in complex CO2/CO/H2/H2O/N2 systems similar to the gas system of industrial blast furnace (BF) were studied by the method of isothermal thermogravimetric analysis. The experimental gas compositions and the corresponding temperature were chosen according to data reported for industrial BFs. The gasification behavior of coke was described by the Random Pore Model (RPM), Volumetric Model (VM), and Grain Model (GM). Results showed that the gas composition of the coke gasification zone in BF changes slightly and that the temperature is the most important factor affecting coke gasification. The lower activation energy of coke samples (Coke Reaction Index (CRI)>50) is due to the high Fe2O3 in the ash, lower degree of graphitization, and larger pore structure. In addition, the choice of kinetic model does not differ substantially in describing the gasification mechanism of coke in a BF.

关键词： blast furnace coke gasification kinetics gas system

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China＇s nuclear power under the global 1.5℃ target： Preliminary feasibility study and prospects

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Advances in Climate Change Research 2018年第2期9卷 138-143页

作者： XIAO Xin-Jian jiang ke-Jun Energy Research Institute National Development and Reform Commission Beijing 100038 China

This study explores the measures to achieve the global 1.5 ℃ temperature rise target （1.5 ℃ target） by analyzing the feasibility and obstacles of nuclear power in China. The 1.5 ℃target imposes stricter requirements on China＇s nuclear power. Considering the available nuclear power plant sites, nuclear power layout, equipment manufacture ＆ supply, nuclear power plant construction capacity, supportive operation ＆ management talents, investment, cost effectiveness, and public acceptance, the achievement of the development objectives of nuclear power in China considering the 1.5 ℃ Target is difficult. However, it is possible if favorable decisions and policies are made.

关键词： 1.5 ℃ target Nuclear power in China Solutions Feasibility Decision-making

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Fault tolerant control for near space vehicle:a survey and some new results

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Journal of Systems Engineering and Electronics 2011年第1期22卷 88-94页

作者： Yufei Xu Bin jiang Zhifeng Gao ke Zhang College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China

A review on fault-tolerant control（FTC） for near space vehicle（NSV） is ***,the concept of near space is introduced,the background of NSV is emphasized,and the model characteristics of NSV in faulty case are ***,a comparison of different existing approaches is briefly carried out,and achievements on the current research in this field are also presented in the view of the practical ***,several existing advanced FTC results for nonlinear flight control systems are ***,the recent literature of NSV are presented to provide an overall view of future developments in this area.

关键词： near space vehicle(NSV) fault-tolerant control(FTC) adaptive sliding mode.

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A new composite material produced by semi-continuous casting

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Acta Metallurgica Sinica(English Letters) 2010年第4期23卷 255-260页

作者： Huixue jiang ke QIN Haitao ZHANG Jianzhong CUI key Laboratory of Electromagnetic Processing of Materials Ministry of Education Northeastern University Shenyang 110819 China

A new composite material consisting of lxxx aluminum alloy and 7xxx aluminum alloy was produced by semi-continuous casting. Macrostructure, microstructure, composition distribution and hardness distribution of composite interface were analyzed. Macrostructure shows that composite interface is planar and clean with little evidence of porosity; microstructure shows that composite interface is a kind of metallurgical bonding; composition and hardness distributions have a good corresponding relationship. At the same time, the mechanical property of composite interface was measured, the tensile strength is 71 MPa, the shearing strength is 62 MPa and the bending strength is 142.5 MPa, which can also show that composite interface is a kind of metallurgical bonding. Temperature distribution of composite interface was obtained by measuring temperatures near composite interface in lxxx aluminum alloy.

关键词： Composite material lxxx aluminum alloy 7xxx aluminum alloy Semi-continuous casting

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Atrazine and its degradation products in surface and ground waters in Zhangjiakou District, China

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Chinese Science Bulletin 2002年第19期47卷 1612-1615页

作者： Jin Ren ke jiang Chinese Acad Sci Ecoenvironm Sci Res Ctr Beijing 100085 Peoples R China

A method using the solid phase extraction (SPE) and liquid chromatography-mass spectrometry (LC-MS) to analyse atrazine and its degradation products at levels of low nanograms per liter in water has been developed. The environmental water samples were filtered and then extracted by SPE with a new sulfonation of poly(divinylbenzene-co-N-vinylpyrrolidone) sorbents MCX. HPLC/APCIMS was used for the analysis of atrazine and its degradation products, desethylatrazine (DEA), deisopropylatrazine (DIA), dideal-kylatrazine (DEDIA), and hydroxyatrazine (HYA). The detection limits ranged from 10-50 ng/L in water samples. Samples were collected from deep wells and a reservoir near a plant that produced atrazine. Atrazine concentration levels in most surface samples were above the limit of the China Surface Water Regulation (3μg/L). In ground water, the levels of degradation product were more than 0.1μg/L and 5 -10 times greater than those of atrazine. The highest DEA concentration in the groundwater sample taken

关键词： atrazine degradation chemicals SPE ground water HPLC-MS.

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Development of an intelligent heterojunction fenton catalyst for chemodynamic/starvation synergistic cancer therapy

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Journal of Materials Science & Technology 2023年第10期141卷 11-20页

作者： Weishu Ni ke jiang Qiaomei ke Jia Su Xianying Cao Ling Zhang Chunxia Li key Laboratory of Food Nutrition and Functional Food of Hainan Province School of Food Science and EngineeringHainan UniversityHaikou 570228China Institute of Molecular Sciences and Engineering Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China State key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China State key Laboratory of Silicon Materials Zhejiang UniversityHangzhou 310027China

Chemodynamic therapy(CDT)as an emerging modality in cancer treatment,its implementation remains a daunting challenge by the lack of smart Fenton catalyst under acidic tumor ***,we have successfully constructed a Fe_(3)O_(4)@MIL-100 heterojunction by growing Fe-based metal-organic framework(MIL-100)onto the surface of Fe_(3)O_(4) *** as-made heterojunction after encapsu-lating glucose oxidase(termed FMG)is demonstrated as a pH-responsive intelligent Fenton nanosystem with the synergistic effect of starvation therapy(ST).Density functional theory(DFT)calculations reveal that such heterojunction could greatly reduce the energy barrier of the Fenton reaction,which better ex-plains the mechanism of Fenton performance ***,the encapsulated glucose oxidase has successfully activated the ST process,in which its generated H_(2)O_(2) and gluconic acid further improve the CDT *** O_(2) from the enhanced CDT in turn promotes the enzymatic reaction of glucose *** Fenton/cascade enzymatic reaction operates in a self-feedback manner as *** vitro and in vivo experiments demonstrate that such intelligent Fenton nanoreactors provide a powerful anti-cancer mechanism for effective tumor ablation with enough *** work provides insights into the developments of MOF-based heterojunctions as powerful anticancer treatment nanoreactors.

关键词： Heterostructure Metal-organic framework Fenton catalyst Chemodynamic therapy Starvation therapy

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Resurrection of the Genus Leptomantis, with Description of a New Genus to the Family Rhacophoridae(Amphibia:Anura)

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Asian Herpetological Research 2019年第1期10卷 1-12页

作者： Dechun jiang ke jiang Jinlong REN Jun WU Jiatang LI CAS key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences University of Chinese Academy of Sciences Nanjing Institute of Environmental Sciences Ministry of Ecology and Environment of China CAS Center for Excellence in Animal Evolution and Genetics Chinese Academy of Sciences Southeast Asia Biodiversity Research Institute Chinese Academy of Sciences

Genus Rhacophorus Kuhl and Van Hasselt, 1 822 is one of the most diverse genera of the family Rhacophoridae, and its taxonomy of genus Rhacophorus faces major challenges because of rapidly described new species and complex interspecies relations. In this study, we investigate the generic taxonomy within the genus Rhacophorus based on 1 972 bp of mitochondrial genes(12S rRNA, tRNA-val and 16S rRNA), containing 102 sequences from 58 species. The results reveal three well-supported and highly diverged matrilines that correspond with morphological characteristics and geographic distribution. Accordingly, we consider these three lineages as distinct genera: Rhacophorus sensu stricto, resurrected genus Leptomantis Peters, 1867, and the genus Zhangixalus gen. nov.

关键词： Rhacophorus taxonomic revision tree frog Zhangixalus gen.nov.

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