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Anticorrosion performance of the coating/metal system by electrochemical impedance spectra

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Journal of University of Science and Technology Beijing 2008年第4期15卷 457-460页

作者： Yinghuai Zhang Lining Xu Minxu lu pu Zhang School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

In order to investigate the anticorrosion performance of the organic coating/metal system, electrochemical impedance spectra （EIS） were measured in the 3.5wt% NaCl solution, the chemical component and the formation of corrosion products scale were analyzed by laser Raman microspectroscopy, and the pattern of the organic coating/metal system was observed by scanning electron microscopy （SEM）. The characteristics and the delamination process of the organic coating/metal system were investigated systematically, and the emphases were on the transportation of the corrosive medium and the changes of the coating/metal interface. The results show that the impedance decreases at the initial immersion, then increases at the middle-immersion, and again decreases at last, which is related to the corrosion products scale. The concentration of Cl in the coating, which destroys the corrosion products scale, increases with the immersion time.

关键词： organic coating electrochemical impedance spectra corrosion product scale anticorrosion

Characteristics of air pollution by polychlorinated dibenzo-p-dioxins and dibenzofurans in the typical industrial areas of Tangshan City,China

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Journal of Environmental Sciences 2011年第2期23卷 228-235页

作者： Zhiyuan Ren Bing Zhang pu lu Cheng Li Lirong Gao Minghui Zheng Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China.

The ambient air in vicinity of different industrial sources for PCDD/PCDFs was sampled by TSP/PM10 active samplers and passive puF disk samplers in Tangshan City, a metropolis containing clusters of various industrial plants. The TEQ concentrations of PCDD/PCDFs ranged from 44.2 to 394.1 fg I-TEQ/m^3 with an average of 169.9 fg I-TEQ]m^3. 2,3,4,7,8-PeCDF was the dominant contributor to ∑TEQ, contributing 41% （12% to 55%）, while 1,2,3,4,6,7,8-HpCDE OCDD and OCDF were the major congeners for the total concentrations. The ratios of ∑PCDF/∑PCDD reached 2.54 on average, suggesting that de novo synthesis in thermal processes played an important role to the airborne pollution of PCDD/PCDFs. The similarities congener profiles indicated that TSP and PM10 active sampling methods are comparable for the determination of the PCDD/PCDFs in ambient air, and the ratios of concentrations determined by the two methods suggested that the PCDD/PCDFs tended to stay in fine particles. It was found that 2,3,7,8-TCDF and OCDD were the dominating congeners in the passive puF disks samples. Through principal components analysis, the coke industry was suggested to be a relatively high potential emission source for PCDD/PCDFs in the ambient air of Tangshan, which was possibly formed by de novo synthesis mechanism. In this study, the atmospheric impacts to the environment from different industrial sources could be ranked as follows （from high to low）： coking, iron sintering, steel making, power generation and chlorinate alkali chemical production industries.

关键词： ambient air dioxins inhalable particles total suspended particles metropolis

New Periodic Wave Solutions, Localized Excitations and Their Interaction Properties for （3＋1）-Dimensional Jimbo-Miwa Equation

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Communications in Theoretical Physics 2007年第4X期48卷 584-590页

作者： DOU Fu-Quan SUN Jian-An DUAN Wen-Shan lu Ke-pu College of Physics and Electronics Engineering Northwest Normal University Lanzhou 730070 China

Based on the multi-linear variable separation approach, a class of exact, doubly periodic wave solutions for the （3＋1）-dimensional Jimbo-Miwa equation is analytically obtained by choosing the Jacobi elliptic functions and their combinations. Limit cases are considered and some new solitary structures （new dromions） are derived. The interaction properties of periodic waves are numerically studied and found to be inelastic. Under long wave limit, two sets of new solution structures （dromions） are given. The interaction properties of these solutions reveal that some of them are completely elastic and some are inelastic.

关键词： Jimbo-Miwa equation Jacobi elliptic function periodic solutions dromions

Tri-level programming model for combined urban traffic signal control and traffic flow guidance

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Journal of Central South University 2016年第9期23卷 2443-2452页

作者： SUN Zhi-yuan lu Hua-pu QU Wen-cong Institute of Transportation Engineering Tsinghua University Beijing 100084 China College of Metropolitan Transportation Beijing University of Technology Beijing 100124 China

In order to balance the temporal-spatial distribution of urban traffic flow, a model is established for combined urban traffic signal control and traffic flow guidance. With consideration of the wide use of fixed signal control at intersections, traffic assignment under traffic flow guidance, and dynamic characteristics of urban traffic management, a tri-level programming model is presented. To reflect the impact of intersection delay on traffic assignment, the lower level model is set as a modified user equilibrium model. The middle level model, which contains several definitional constraints for different phase modes, is built for the traffic signal control optimization. To solve the problem of tide lane management, the upper level model is built up based on nonlinear 0-1 integer programming. A heuristic iterative optimization algorithm(HIOA) is set up to solve the tri-level programming model. The lower level model is solved by method of successive averages(MSA), the middle level model is solved by non-dominated sorting genetic algorithm II(NSGA II), and the upper level model is solved by genetic algorithm(GA). A case study is raised to show the efficiency and applicability of the proposed modelling and computing method.

关键词： traffic engineering traffic signal control traffic flow guidance tri-level programming model

Programming the lifestyles of engineered bacteria for cancer therapy

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National Science Review 2023年第5期10卷 138-153页

作者： Shengwei Fu Rongrong Zhang Yanmei Gao Jiarui Xiong Ye Li lu pu Aiguo Xia Fan Jin Hefei National Research Center for Physical Sciences at the Microscale Department of Polymer Science and Engineering University of Science and Technology of China CAS Key Laboratory of Quantitative Engineering Biology Shenzhen Institute of Synthetic BiologyShenzhen Institutes of Advanced TechnologyChinese Academy of Sciences West China School of Medicine West China Hospital of Sichuan University

Bacteria can be genetically engineered to act as therapeutic delivery vehicles in the treatment of tumors,killing cancer cells or activating the immune *** is known as bacteria-mediated cancer therapy(BMCT).Tumor invasion,colonization and tumor regression are major biological events,which are directly associated with antitumor effects and are uncontrollable due to the influence of tumor microenvironments during the BMCT ***,we developed a genetic circuit for dynamically programming bacterial lifestyles(planktonic,biofilm or lysis),to precisely manipulate the process of bacterial adhesion,colonization and drug release in the BMCT process,via hierarchical modulation of the lighting power density of near-infrared(NIR) *** deep tissue penetration of NIR offers us a modality for spatio-temporal and non-invasive control of bacterial genetic circuits in *** combining computational modeling with a high-throughput characterization device,we optimized the genetic circuits in engineered bacteria to program the process of bacterial lifestyle transitions by altering the illumination scheme of *** results showed that programming intratumoral bacterial lifestyle transitions allows precise control of multiple key steps throughout the BMCT process and therapeutic efficacy can be greatly improved by controlling the localization and dosage of therapeutic agents via optimizing the illumination scheme.

关键词： genetic engineering drug delivery cancer therapy optogenetics synthetic biology

Interfacial space charge characteristic of PPLP insulation for HVDC cables

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High Voltage 2020年第5期5卷 628-635页

作者： Xuefeng Zhao lu pu Zhiqiang Xu George Chen Wei Duan Haofei Sun Zeli Ju Shannxi Electric Power Research Institute Xi'anShannxiPeople's Republic of China School of Electronics and Computer Science University of SouthamptonSouthamptonUK

High-voltage DC(HVDC)cables show more efficiency than high-voltage AC cables over the long distance power transmission and have attracted significant attention recently due to rapid developments in off-shore wind *** laminated paper(PPLP)insulation based HVDC cables have provided a reliable operation for many years and are the highest voltage level in operation at the *** this study,the authors intend to understand the electrical performance of PPLP insulation system by examining space charge in detail,especially at the *** has been found that the interface between polypropylene and Kraft paper acts as trap for charge carriers,resulting in an optimal electric field distribution in PPLP insulation *** optimal electric field distribution enhances overall electrical performance of PPLP insulation,including higher dc breakdown strength and lower electrical conductivity.

关键词： PPLP insulation charge

Analysis on diff icult situations and strategies of constructing ecological civilization of enterprises

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Ecological Economy 2016年第1期9卷 52-57页

作者： LIU Wen-zhi lu Hua-pu Institute of Transportation Engineering Tsinghua University School of Management Beijing Union University

In recent years, China has launched active exploration and practices in the aspects of the construction of ecological civilization and has made remarkable achievements. In this process, enterprises have played an important role in optimizing the economic growth, promoting energy-saving and emissionreduction, and spreading ecological culture. The paper analyzes the present situation and existing problems of current construction of ecological civilization of enterprises in China. On the basis of current situation of the construction of ecological civilization of enterprises in Beijing and in line with the industrial standard of CRISP-DM, the paper utilizes decision tree algorithm and researches the key elements which infl uence the enterprises' willingness of the construction of ecological civilization. The research result shows that there are three key elements which infl uence the enterprises' willingness of the construction of ecological civilization: enterprises' average sales of the past three years, the categories of enterprises and enterprises' principals' cognition on the responsibility of the construction of ecological civilization; other two variables have no infl uence on the willingness: the ration of research and construction staff in enterprises and that whether enterprises are high-tech ones. Therefore, it is necessary that governments should take the lead to establish strong conception of ecological civilization among citizens, carry out vigorously the publicity and education of the construction of ecological civilization, enhance the cognition levels of enterprises' principals and reduce the costs of the construction of ecological civilization.

关键词： construction of ecological civilization willingness infl uencing elements strategies

Identification of QTLs and candidate genes for physiological traits associated with drought tolerance in cotton

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Journal of Cotton Research 2020年第1期3卷 13-45页

作者： MAGWANGA Richard Odongo lu pu KIRUNGU Joy Nyangasi CAI Xiaoyan ZHOU Zhongli AGONG Stephen Gaya WANG Kunbo LIU Fang State Key Laboratory of Cotton Biology/Institute of Cotton Research Chinese Academy of Agricultural SciencesAnyang 455000HenanChina Jaramogi Oginga Odinga University of Science and Technology P.O Box 210-40601BondoKenya

Background:Cotton is mainly grown for its natural fiber and edible *** fiber obtained from cotton is the indispensable raw material for the textile *** ever changing climatic condition,threatens cotton production due to a lack of sufficient water for its *** of drought stress are estimated to affect more than 50%of the cotton growing *** elucidate the drought tolerance phenomenon in cotton,a backcross population was developed from ***,a drought tolerant donor parent and *** which is highly susceptible to drought ***:A genetic map of 10888 SNP markers was developed from 200 BC_2F_2 *** map spanned 4191.3 centi-Morgan(c M),with an average distance of 0.1047 c M,covering 51%and 49%of At and Dt sub genomes,*** stable Quantitative trait loci(QTLs)were detected,in which more than a half were detected in the At ***-nine candidate genes were mined within the QTL regions for three traits:cell membrane stability(CMS),saturated leaf weight(SLW)and chlorophyll *** genes had varied physiochemical properties.A majority of the genes were interrupted by introns,and only 15 genes were intronless,accounting for 17%of the mined *** genes were found to be involved molecular function(MF),cellular component(CC)and biological process(BP),which are the main gene ontological(GO)functions.A number of mi RNAs were detected,such as mi R164,which is associated with NAC and MYB genes,with a profound role in enhancing drought tolerance in *** RT-q PCR analysis,5 genes were found to be the key genes involved in enhancing drought tolerance in *** cotton harbors a number of favorable alleles,which can be exploited to aid in improving the narrow genetic base of the elite cotton *** detection of 30 stable QTLs and 89 candidate genes found to be contributed by the donor parent,***,showed the significant genes harbored by the wild progenitors which

关键词： Cotton spp. Quantitative trait loci Genetic map Drought tolerance mi RNAs Gene ontology

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陕甘宁边区法官队伍建设

宁夏社会科学 2006年第3期 22-27页

作者：律璞西北政法学院陕西西安710063

在陕甘宁边区存在的13年间,边区政府、边区高等法院十分重视法官队伍建设,为建立一支高素质的法官队伍作出了贡献。主要表现在:道德素质建设方面,注重培养法官“司法为民”、“司法公正”的理念;业务素质建设方面,重视法官培训工作,注... 详细信息

在陕甘宁边区存在的13年间,边区政府、边区高等法院十分重视法官队伍建设,为建立一支高素质的法官队伍作出了贡献。主要表现在:道德素质建设方面,注重培养法官“司法为民”、“司法公正”的理念;业务素质建设方面,重视法官培训工作,注重法官业务学习,积极开展司法检讨活动。这在当今我国法官队伍数量庞大,但缺乏职业传统和职业气质,在职业伦理与职业操守亟待培养的情况下,具有重要的借鉴意义。

关键词：陕甘宁边区法官队伍建设政府高等法院