中国县级区域人口、资源、环境与经济协调发展的可持续发展系统理论和评估方法研究

我国县级实施区域可持续发展战略的关键是实现经济增长方式从粗放型向集约型的 根本转变。就我国大多数县级地区来说,过多的人口是影响可持续发展的一个因素,但要实现区 域人口、资源、环境与经济协调发展下的可持续发展,更重要的则是如何在国民经济“十五”规划和 2010 年远景目标的指导下进行人口、资源、环境与经济协调发展下的可持续发展管理和评估问题。 因此,本论文的目的就在于对传统的以产值———收入为中心的发展评价方法进行变革,并创建一 套系统的中国县级区域人口、资源、环境与经济协调发展下的可持续发展的评估指标体系和管理 方法

The Effect of Multi-irreversibilities on Thermoeconomic Performance of a Heat Transformer

【中文文摘】基于一类不可逆三热源热变换器的循环模型,提出以每单位成本的泵热率作为热经济学目标函数,优化热变换器的各种性能参数.分析内不可逆性、热漏和经济参数对热变换器性能的影响,利用数值解计算热经济学目标函数的最大值及所对应的各种性能参数. 【英文文摘】The heating load per unit cost is taken as the thermoeconomic objective function with the cycle model of a class of irreversible three-heat-source heat transformers as the basis. The objective function is used to optimize the performance of the cycle. The effect of internal irreversibility, heat leak and economic parameter on the performance of the cycle is analyzed. The maximum thermoeconomic function and the corresponding performance parameters are obtained by using numerical calculation. The results obtained here provide some valuable guidance for the optimal design and operation of practical systems.国家自然科学基金资助项目(59976033

Analysis of the Festo CLR Cylinder Performance

本文对Clr气缸工作性能的实验研究,目的是为了满足数控机床气动随行夹具中气缸的旋转夹紧要求。利用PlC控制器、气阀、气缸、传感器等元器件搭建实验平台。对主要实验步骤进行详细分析,通过实验论证fESTO Clr直线摆动夹紧气缸完全满足气动随行夹具工作要求。In this paper,we introduced an experiment to study the performance of pneumatic cylinder.In order to meet the requirements of the line/rotation clamping cylinder in CNC machine tools pneumatic clamp accompanied system.Using PLC controller,valves,cylinders,sensors and other components to build an experimental platform,the main experimental steps have been analyzed in details.Through the different kinds of experimental data demonstrating the Festo CLR line/rotation clamping cylinder is fit for the requirement of practical work

The application and research of the aircraft flexible fixture

主要研究气动、液压与电传技术在航空制造业中装配工艺中的应用。对研制出数控机床气动柔性夹紧系统,及其在飞机上零件加工上的应用进行了详细论述,包括柔性系统的机构组成、工作原理及PlC控制系统。该技术的突破为我国飞机数字化加工装配提供了参考价值,并将促进航空制造业的跨越式发展。The application of the pneumatic,hydraulic and power transmission for assembly process and equipment in aviation manufacturing industry is study.A novel type of CNC Aircraft Flexible Fixture machine system has been made out,and applied in manufacturing the aircraft parts.The system is including in architecture of the composition,working theory,PLC control system.It has a great signification of the manufacturing technology for aircraft digital processing,manufacturing and assembling,and promoting the developing of aircraft manufacturing

The Relation between the Optimal Coefficient of Performance and the Rate of Energy Pumping for a Class of Chemical Pumps

建立了一类化学泵循环模型 ,考虑质量传递不可逆性对循环性能的影响 ,导出循环的泵能率与性能系数间的优化关系 .在此基础上进一步讨论了循环的其它优化特性 .所得结论可为电化学、光化学、质量交换器及固态设备等的优化设计提供新的理论指导The cyclic model of a class of chemical pumps is established.The effect of the irreversibility of mass transfer on the cyclic performance is taken into account,and the relationship between the optimal coefficient of performance and the rate of energy pumping is derived.Moreover,other optimal performances of the cycle are discussed.The results obtained here can provide some new theoretical guidelines for the optimal design of a class of apparatus such as electrochemical,photochemical,and mass exchangers and solid state devices.国家自然科学基金资助项目!(5 9976 0 33

Investigation on the Optimum Performance and Parametric Design of a Variety of Energy Conversion Systems

节能、提高能效、开发新能源(包括可再生清洁能源)是今后能源发展的重点,而能量转换系统的性能优化与参数设计是高效利用能源的一个关键科学问题.结合国内外的研究现状和本研究组近年来的研究工作,介绍在磁制冷、半导体热电器件、太阳能热利用、化学机与化学泵、燃料电池及其耦合系统、电解水制氢系统、布朗马达及量子热力学循环等能量转换系统的性能优化与参数设计方面所取得的一些重要成果.Saving energy,increasing efficiency of energy utilization and empoldering new and renewable clean energy sources are emphases of developing energy source in the coming years.The performance optimization and parametric design of energy conversion systems is one of the key science problems in energy utilization with high efficiency.In the present paper,some important research results involving the optimum performance and parametric design of a variety of energy conversion systems,such as the magnetic refrigeration,semiconductor thermoelectric devices,thermal utilization of solar energy,chemical engines and chemical pumps,fuel cell hybrid systems,water electrolysis systems for hydrogen production,Brownian motors,quantum thermodynamic cycle systems,and so on,are introduced in combination with both the research status at home and abroad and the research work of our group in recent years.国家自然科学基金项目(51076134;50776074;59976033;10575084);教育部博士学科点专项科研基金项目(20090121110026);国家重点基础研究发展计划(973)项目(G20000263)子课题;福建省科技重点项目(2004-33)

我国反向抵押贷款金融产品创新研究

作为一种新的金融产品,反向抵押贷款实现“以房养老”为一些西方国家所利用。在我国这样转型社会中,初步具备了实行“以房养老”的社会经济条件,推出反向抵押贷款金融产品要全方位、多层次进行思考

THE INFLUENCE OF FINITE-RATE HEAT TRANSFER AND INTERNAL IRREVERSIBILITY ON THE CYCLIC PERFORMANCE OF A SOLAR ENGINE

本文建立太阳能热机系统的一般循环模型，探讨传热和内不可逆性因素对其循环性能的影响；在不同的热传递规律下优化系统的各主要性能参数，对系统的效率、集热器的工作温度和热机中高、低温热交换器的传热面积比作了较深入的分析，从而获得一些有意义的新结论。A general cycle model of a solar engine is set up. The influence of finite-rate heat transfer and internal irreversibility on the cyclic performance of the system is searched. The several main performance parameters of the system are optimized for some different heat-transfer laws. The efficiency of the system, the operating temperature of the solar collector and the ratio of heat-transfer areas of heat exchangers in the engine are analyzed in detail, so that some new significant results are obtained.国家自然科学基金资助项目!（No．59976033

采用新的结构—尾流反作用力耦合模型分析圆柱结构涡激共振

该文建立了一个新的结构—与尾流振子流固耦合模型。采用具有非线性阻尼的振子来模化、vanderpol方程来描述流场近尾迹动力学。以结构与流体的受力互为反作用力的关系,建立了新的流固耦合模型。使用该文的模型对二维结构涡激振动问题进行研究,能很好地预计结构涡激共振的特性。计算结果表明,结构共振的最大振幅A

IMPACT OF MULTI-IRREVERSIBILITIES ON THE PERFORMANCE OF A SOLAR SPACE POWER SYSTEM

考虑太阳能空间动力系统中的主要不可逆因素对其循环性能的影响 ,应用有限时间热力学理论计算系统在不同约束条件下的最大效率 ,确定太阳能集热器的最佳工作温度 ,并对其它有关的性能参数进行优化分析 ,从而获得一些有意义的新结论。In this paper,impact of main irreversible factors on the cyclic performance of a solar space power system are considered.The maximum efficiencies of the system under different constrained conditions are calculated in terms of the theory of finite time thermodynamics.The optimal operation temperatures of the solar collector are determined.Moreover,other related performance parameters are optimized.国家自然科学基金资助项