预应力装配混凝土复合墙板抗震性能试验研究

结合砌体结构的发展现状和住宅产业化的发展趋势,提出一种“预应力装配混凝土复合墙板”,以期望在中小城镇低层建筑民用房屋中发展一种新的结构形式来对砌体结构进行补充。为了考察该复合墙板的抗震性能,对2块不同预应力度的试件进行了拟静力试验。得到了相应试件的抗震性能指标,显示该墙板具有较好的承载能力和变形性能,分析认为所提出的墙板可以达到8度区低层民用房屋的应用要求,可以作为砌体承重墙的一种替代形式,并且对该墙板相关构造提出了改进建议。     

马铃薯研究领域未来发展新方向分析

基于目前马铃薯研究领域的现状,分析了未来马铃薯研究发展新方向,即从目前集中关注马铃薯微观层面的研究,转向宏观领域的研究,尤其是在马铃薯遥感空间分布信息提取、单产模拟同化研究、空间格局动态变化机理、空间格局动态变化模拟等4个方面加强研究。此外,还列举了这4个方面目前的研究进展,同时指出综合运用遥感、地理信息系统、空间统计和计算机模拟等方法,着力研究马铃薯空间格局动态变化特征,有利于马铃薯种植结构与布局的优化,保障中国粮食安全。     

Numerical Simulation Analysis on Ductility Performance of High Strength RC Frame Structure

High-strength concrete has been widely used in civil structures for advantages of higher-strength, earlier curing strength and smaller deformation in applications. However, relatively weak ductility in structures in seismic zones prevented it from further application. The ductility of the structure can be improved by reinforcing reasonably rebars in correct details. A high strength RC frame model with twelve floors and two bays is numerically analyzed by using DRAIN-2DX program. It was shown that this worked fairly well in simulation of the process of structural damage and energy dissipation capacity. It also showed that this kind of frame structure has good ductility and dissipation capacity as well as great seismic performance. The proposed method can be applied in high-strength concrete structures in seismic zone.     

Fiber Fabry-Perot Sensor and Its Application for Monitoring Bridge Strain

The strain is an important parameter that reflects the bridge health status, the fiber Fabry-Perot sensor is embedded in the concrete structure as the intelligent sensing element for the bridge strain. The strain measuring system is made up of the fiber Fabry-Perot sensor,light switch,fiber strain gauge and the comput- er; it can be used to monitor automatically the bridge strain. At present,the system has been installed in the Dafosi Bridge over the Yangtze River in Chongqing. The monitoring data show that the fiber Fabry-Perot sensor has good stability and reliability; it can be used to monitor the bridge strain for a long time.     

THE COMPREHENSIVE HYDRAULIC TESTING SET WITH A LOAD SENSING SYSTEM

This paper introduces the comprehensive hydraulic testing set for many kinds of hydraulic elements with hydraulic drive, hydraulic regulation and hydraulic loading. It has rational structure compact arrangement, reliable characteristics and advanced technique. In order to reduce the energy loss in the hydraulic system of the testing set, 1 ad sensing control is used. The static and dynamic characteristics of the load sensing system are analysed with the method of numeral simulation on computer. the testing witk load sensing control results show energy may be saved obviously and the heat load in hydraulic system may be reduced effectively, then testing quality is improved and the volume cf oil case is lessened. The lead sensing valve design is satisfied with simplifying structure so that it may be used reliably for the fixed flow hydraulic system of the testing set or other machines.     

洛阳市绿地景观格局分析及综合评判

绿地景观是城市生态系统的生态基础,人类赖以生存的基质与环境,城市生物多样性的载体,以洛阳市绿地景观为研究对象,利用遥感(RS)技术获取绿地的景观信息,建立了洛阳市绿地信息专题数据库,在景观生态学理论指导下,从绿地量、绿地规模、连接程度、空间布局等方面进行了洛阳市绿地景观格局分析,并通过主成分分析法,利用主成分与贡献率乘积的累积值,对不同区域绿地进行景观格局综合评价,将评价指标综合为景观格局、分离度和廊道密度3项指标,由于涧西区的人均绿地面积、绿化覆盖率、斑块平均面积、景观优势度、多样性指数均为最大;得出涧西区最优,西工区次之,老城区第三,洛龙区第四,瀍河区最差。该方法为绿地景观格局的综合评价提供了一定的参考,为洛阳市绿地系统的景观结构优化提供依据。     

基于承包地确权成果的农作物种植结构调查

为快速、便捷获取农作物种植结构信息,选择山西省永济市开张镇作为研究区,基于农村土地承包经营权确权登记颁证成果数据,采用访谈调查法获取研究区农作物种植结构,并通过实地验证对其精度进行检验.结果表明:(1)开张镇农作物面积8926.86 hm2,包括果树、小麦、玉米等11种作物,农作物以果树和小麦为主,涉及39012个承包...     

农村民间信贷行为分析-基于辽宁省本溪县的调查

目前,民间信贷作为一种金融形式,在经济活动中占据着重要的地位。全面、详实的了解民间信贷情况对促进当地区域经济发展、促进金融系统改革和提高资本效率将起到巨大的推动作用。本文通过对辽宁省本溪县3个典型村的农户的问卷调查,了解了基点村的民间信贷现状及产生的原因、民间信贷的用途;并对于民间信贷对当地金融市场的影响及利弊关系进行了分析。研究结果表明：作为信贷一种形式,民间信贷在当地农户的经济活动中依然发挥着显著作用,从民间信贷的特点来看,民间信贷行为与当地的经济、文化以及农户的生产生活方式有着密切的联系。为今后该地区民间金融市场的完善与发展提供了现实依据。最后提出了引导民间信贷行为正规发展的建议与具体措施。     

Seepage Resistance and Moisture Proof of Concrete Using Electro osmotic Pulse

Seepage resistance and moisture proof of concrete structure is a hard work in civil engineering. The influence factors of seepage resistance and moisture proof of concrete using Electro Osmotic Pulse (EOP), such as electric voltage, water to cement ratio of concrete, ion concentration in liquid phase, and pulse frequency, were analyzed. Simulating experiment of EOP used to drain water and reduce relatively humidity of concrete structure is executed. The results show that, volume of water seepage is improved due to application of EOP in concrete with increase of electric voltage, W/C of concrete, and concentration of sodium sulfate. And pulse frequency has little effect on volume of water seepage. The results are also presented that effect of dewatering and humidity reducing are remarkable when EOP is applied in concrete structure.     

The Housing Satisfaction of Civil Servants and Induced Policy Guiding

For designing a reasonable housing supply system for the civil servants,the sorted Multinomial Logistic Model is adopted to appraise the match-up level of current housing supply policy and the actual housing demand of the civil servants.Those unmarried,on department level and below,discontented with current housing subsidy method,or those who acquired their houses from the non-market source are likely unsatisfied with the current housing conditions.The result of the Unsorted Multinomial Logistic Model identifies the housing affordability and the housing subsidy standard as the key factors to affect the housing choice of the civil servants.The supply sources,the housing modes for the special civil servants group and the subsidy standards should be focused on when constructing the whole civil servant housing supply policy system.     

诉讼在乡土社会所处的困境及其功能弱化——安徽乡村民事纠纷的调查报告

在社会大转型中。中国农村民事纠纷与城市纠纷相比,具有主体的熟知性、类型的多样性、利益冲突的易激性等特点,这些特定的因素决定了乡土社会纠纷与现代诉讼制度之间冲突的必然性。对乡土社会的调查和深入的实证研究表明：诉讼在解决农村民事纠纷实际运作中确实也发生了某种偏离：一方面各种纠纷在新的经济背景下愈演愈烈,而现代化法律话语的诉讼却无法为纠纷的解决提供有效的途径,在乡土社会中诉讼及支撑诉讼的现代性法律知识和制度已被抵御、蜕变和整合。而ADR的灵活性、简易性、非对抗性、多样性等特性恰恰使其在解决农村民事纠纷时具有独特的优势。因此,代表国家权力的诉讼应当仅仅是解决乡土社会民事纠纷以达到社会和谐的其中一个途径．在ADR视野下构建中国农村民事纠纷解决机制具有极具合理性和可行性。非诉纠纷解决机制在处理农村民事纠纷上仍有很大的空间。     

Progressive Collapse Analysis of RC Frame Using Vertical Nonlinear Dynamic Analysis

Progressive Collapse Analysis (PCA) is the base of quantitative assessment of progressive collapse-resisting capacity and progressive collapse-resisting design. There has been heightened interest among researchers of civil engineering in PCA. PCA of planar RC frame is carried on by vertical nonlinear dynamic analysis based on alternate load path method. According to responses of damage structure, progressive collapse-resisting capacity of remaining structure is evaluated. Two cases of removal of elements are analyzed, removal of columns at different stories on the same axes one by one and removal of all columns on the same axes at the same time. According to analysis of the effect of failure duration on structural progressive collapse, it is showed that the response of remaining structure is highly sensitive to failure duration of elements. The results indicate that vertical nonlinear dynamic analysis is an efficient method of progressive collapse-resisting design and progressive collapse-resisting capacity analysis.     

The Storage of Tree Data Structure by Gradation and Classification and Application in CAD for Engineering Structure

The traditional storage of tree data structure is according to the relation of the elements' frant-and-back. Since it is difficult to define the frant-and-back relation of graphics units in CAD for Engineering structure, the application of the tree structure becomes inconvenient. The authors change the storing method for the tree structure into gradation and classification. And a graded equivalence relation of graphics units is brought forward, which grade the graphics units with the equivalence relation. By using this storing method, we can easily accomplish some operations, such as picking up the subtree with a certain character, deleting a node, insert a graded and classified node, etc. The example provided indicates that the storage by gradation and classification can speed up searching and process the data of the subtree by gradation and classification expediently. This kind of storing method for the tree structure is applicable for data which contain the graded equivalence relation.     

副干酪乳杆菌prcA基因克隆及生物信息学分析

旨在了解副干酪乳杆菌prcA基因的结构和功能,探明prcA基因与副干酪乳杆菌拟群体效应相关基因—自诱导肽编码基因之间的联系。通过PCR方法对副干酪乳杆菌中prcA进行扩增,并通过生物信息学方法对该基因的核苷酸组成、蛋白质构象等方面进行预测和分析。克隆得到的prcA基因全长为416 bp,包括一个138 bp的开放阅读框,编码45个氨基酸,蛋白分子量为5326.83 Da,等电点为4.85,是一种稳定蛋白,不含跨膜区,蛋白质的二级结构以α-螺旋、不规则卷曲和延伸主链组成,亚细胞定位预测显示该蛋白主要位于细胞外;prcA基因为副干酪乳杆菌拟群体效应相关基因—自诱导肽编码基因,负责细菌素生成的调控。     

耕作方式对根土关系的影响及CT技术在其研究上的应用

东北是中国重要的粮食生产基地,在保障国家粮食安全发挥了重要作用,合理的土壤结构促进作物根系生长,为高产奠定了良好的物质基础。而土壤耕作调控土壤结构创造良好耕层结构,促进作物根系生长,是良好土壤结构形成和根系健康生长的“桥梁”,将土壤结构与作物根系之间关系结合起来,起着非常重要调控作用。本文阐述了耕作方式对土壤结构的影响及土壤结构与作物根系之间的互作关系,分析了CT技术在土壤结构和根系结构上的应用,展望了东北农田黑土区土壤结构和作物根系互作关系的研究重点及发展方向：一是要明确保护性耕作原状土体和团聚体结构特征,解析新型耕作技术对土壤结构的调控作用机制,阐明土壤结构决定土壤功能的内在机理;二是要明确保护性耕作玉米根系的结构特征,解析玉米根系生理代谢及衰老机制,揭示玉米根系生长对土壤结构应答的响应机制。其研究将为保育东北黑土,塑造理想根型,提升作物产量和助推全程机械化安全生产提供理论支撑。     

消费需求变化视角下的产业结构优化

为了促进经济的快速发展,保证产业结构与需求结构的协调发展。通过分析消费结构变化对产业结构的影响,研究了中国消费需求结构的变化,并结合中国渔业产业结构的现状,借鉴日本在渔业产业结构优化方面的经验,提出了优化中国渔业产业结构的对策建议。     

An Analysis on the Altitude of Industrial Structure of Chongqing

To supply an even more amplitude background for the analysis on the quality of the structure of Chongqing, this paper analyzed the altitudes of employment structure and production value structure among three industry structures in Chongqing, then an static and dynamic comparison with other countries of DIFFERENT levels on the basis of grasping Chongqing's status in Western Area. An structural explanation of ChongQing's economy development stage aiming at giving an even more amplitude background to analyze the essence of its industrial structure.     

Rolling Back the Frontiers of the State: Civil Service Reorganization and Relocation in Britain

Urban and regional studies of service location concentrate on private business and financial services. In contrast, this paper uses the example of the central government civil service in Britain to develop understanding of the spatial dynamics of public services. The paper shows how the location of civil service employment has been influenced by changes in government policy over the last thirty years. It also indicates the way in which the over-concentration of the private sector in London and the South East, throughout the period, has encouraged the decentralization of the civil service from the capital to a variety of provincial locations.     

基于高光谱数据提取棉花冠层特征信息的研究

 采用ASD Field Spec Pro VNIR 2500型高光谱仪获取了不同生育时期棉花冠层的高光谱遥感数据,通过光谱分析技术研究了棉花冠层结构与其光谱数据之间的关系。结果表明,不同品种、不同密度、不同配置方式及不同生长状况间棉花的冠层光谱存在着较明显的差异,棉花冠层光谱反射率与其叶绿素含量、叶面积和生物量及生长发育阶段、健康状况和物候现象等因素密切相关。可见,运用高光谱遥感技术快速、有效、非接触、非破坏性地获取棉花冠层信息,对解释、预测和设计理想棉花群体意义重大,同时为新疆精准种植棉花和科学调控水肥提供了科学依据。     

ASEAN Forum on Migrant Labour: A space for civil society in migration governance at the regional level?

The aim of this article is to discuss and substantiate new spaces for the political participation of migrant civil society at the regional level in Southeast Asia through the lens of the Association of Southeast Asian Nations (ASEAN) Forum on Migrant Labour (AFML). The AFML process is shaped by the International Labour Organisation and mirrors its tripartite format, essentially bringing together governments, employers’ and workers’ organisations. Crucially, migrant support and self‐organisations also have access, even if somewhat restricted, to regularly held deliberations. In light of the ASEAN consensus on migration that was agreed upon at the end of 2017, the article situates the AFML within the ongoing process of migration governance in the region and focusses especially on the role of migrant civil society as an important stakeholder. Based on the specific experience of civil society organisations (CSOs) from Malaysia, the article discusses which spaces the forum provides for civil society actors and how the latter use them for their advocacy. The major argument of the article is that the development of migration policies at the regional level can benefit from the inclusion of migrant civil society in the process. The governance of migrants could thus be complemented by governance for and by migrants.