Global Attractors for a Class of Pattern Formation Equations

A class of pattern formation equations is treated, the existence of its global attractor is considered and some estirnates of its dimension are given. This sort of pattern formation equations relate to turbulence phenomenon in chemistry and combustion, so it is of great physical importance. Besides, its important theoretical value lies in that the equation contains differential operator of the fourth order in space. The global attractor exists after a series sophisticated estimates by the means of interpolation inequity and embedding theorems in sobolev spaces. Furthermore, some estimates on its fractal dimension are given.     

Singularly Perturbation of the Nonlinear Three Species Prey-predator Reaction Diffusion System

A class of nonlinear three species in the biomathematics is considered with the prey-predator singularly perturbed problems for the reaction diffusion system method of differential inequalities. Under suitable conditions, the existence and asymptotic behavior of solution for the initial boundary value problems are studied with the theory of differential inequalities. The theory of differential inequalities is really to constructing two auxiliary functions, which are super and lower solutions of the system respectively. And then the super and lower solutions are satisfied corresponding inequalities. Finally, there is a solution of the system between the super solution and lower solution. Then the existence of the solution for the system is proved and the asymptotic estimation is obtained.     

认识“三农”问题，构建和谐农村

（1德州经济开发区管委会,山东德州 253034;2天津大学管理学院,天津 300072; 3内蒙古大学公共管理学院,内蒙古呼和浩特 010021）     

基于Google Earth的二次开发在农场管理系统的应用研究

Google Earth 是一个卫星影像浏览软件,它采用“虚拟地球”的方式,提供多种分辨率的全球影像数据。自05年问世以来,它的使用群体越来越多,在许多应用领域中都可以把它作为一个工具软件和开发平台。本文通过面向对象的编程语言,探讨了基于Google Earth的二次开发构造的具体步骤与方法,为利用Google Earth来构建农场GIS系统提出了一种新的思路与方法。     

Analyisis of Arching Mechanism in Compacted Rockfill

As the main material in constructing dams,arching mechanism in compacted rockfill is aways the focus of safety problem in compacted rockfiu dams. Compacted rockfill has different engineering characteristics according to stack forms and constructing techniques,and the failure of compacted rockfill conforms to Coulomb_Mohr criterion.Compacted rockfill is the main material in protecting embankment for the migration movement in Fuling city zone.The arching action is theoretically studied and numercally modelled especially for constructing techniques.It is found out that the arching action begins and numerically of settlement and burdens part of load and deadweight of upper soil.Earth pressure applied to the arch is smaller than the weight of overburden.     

Study on Nonlinear Dynamical Method for EEG Signal Processing

After studying the meaning of EEG signal processing using systems theory,the basic difficulties of the research on the EEG system and signal analysis are given,showing that it is hard to build model of the EEG system and signal.Hence,we introuduce the method of reconstructing the attractor in state spaces.Through the analysis of some experiments,the meaning of the presented method has been discussed.     

基于OBE理念的“食品工厂设计”教学改革与实践

基于OBE理念,进行了“食品工厂设计”课程教学改革。围绕学生取得的学习成果提出了“食品工厂设计”课程建设基本思路,从构建课程目标、优化理论教学、提高实践能力、完善考评体系等4个方面进行了教学研究。以期提高理论和实践教学效果和质量,为我国新时代工程人才培养和形成世界水平的工程教育体系提供思路及方法。     

农业“走出去”与境外农业园区建设

农业“走出去”是国家“走出去”战略的重要组成部分,是统筹利用国际国内“两个市场、两种资源和两类规则”的重要途径,为农业转方式、调结构提供了良好外部机遇。发展境外农业合作园区能够有效提升农业企业投资效率,有利于发挥企业集聚效应,实现较快发展。本研究对当前中国农业“走出去”的发展现状与特征进行分析,总结归纳了境外农业园区建设与发展概况,探讨未来境外农业园区的发展方向。分析认为,境外农业园区建设是农业“走出去”的重要方式之一,应积极引导园区建立开放型招商机制,提升园区内企业的产业化水平,形成产业链配套,带动区内企业集群式发展,加快农业“走出去”步伐,提高农业企业的资源配置能力和竞争能力。     

A Prediction of Network Traffic Flow Based on Lyapunov Exponent

The prediction of network traffic flow is a problem of great significance in the research work of resource allocation and congestion control. Based on this accurate prediction, the scheme of resource allocation and control can easily adapt to dynamic variations of incoming traffic flow. So the goal of optimal network performance is achieved. There are many sorts of traffic flow of self-similarity characteristics in high-speed network, and some research work has showed this self-similarity keeps in close contact with the attractor of chaos system. A rate prediction of self-similar traffic sources in high-speed network is proposed as well as the maximum of predictable time by applying the technology of phase space reconstruction about chaotic time series. This method has a simple prediction mode, and the result of simulations indicates it also has highly accurate results.     

矿用高压开关电器短路开断与关合试验电源

针对国内冲击发电机性能参数不足,以国外冲击发电机作为试验电源,建立基于直接试验法的矿用高压开关电器短路开断与关合试验系统,提出了一种新的技术解决方案。仿真试验结果表明,该方案满足综合性煤矿高压电气实验室建设项目技术指标和试验标准要求,为大容量开断与关合试验系统设计和建造提供一种技术思路。     

The Location Behavior of the Multinational Enterprise: Some Analytical Issues

ABSTRACT In the international business literature location behavior has traditionally been analyzed using Dunning's (1977 ) OLI framework, which focuses on the nature, role, and behavior of multinational enterprise (MNE). In this paper it is argued that this approach is now no longer appropriate for discussing the spatial behavior of MNEs, because of the fundamental changes which have taken place either in MNE organization or in the global and institutional environment for foreign direct investment (FDI). At the same time, the paper argues that current location theory from regional economics and economic geography is also largely unsuitable for discussing these issues, such that the spatial behavior of the MNE provides a set of difficult challenges to location analysts. There appears to have been some response to these issues from the international business and management literature, most notably the Porter literature on clusters. However, it is also argued here that this literature provides few, if any, real answers to the problems set by the geographical behavior of the MNE. It is concluded that a fusion of traditional economic geography approaches with a focus on the information and organizational aspects of the firm and the region under consideration may be a way forward for both theory and empirical analysis.     

不同遥感传感器监测森林虫害研究进展与展望

森林约占陆地面积的1/4,是全球生态系统重要组成部分。近年来害虫侵袭致使林木大量死亡,森林生态安全遭到破坏,亟需探寻一种简洁、高效的森林虫害监测方法。通过分析与总结国内外学者的研究,并查询相关书籍资料,对比多光谱、高光谱和微波等遥感传感器在森林虫害监测中的应用,对其优劣势进行分析。研究发现多光谱遥感空间分辨率高,但光谱分辨率较差,难以感知林木内部细微变化;高光谱遥感光谱分辨率高,可以感知林木内部细微变化,但其空间分辨率较低,且数据量大不易计算;微波遥感具有很强的穿透性,可进行全天候、全天时监测且不易受天气影响,但其空间分辨率低,难以获取林木光谱信息。未来应提高害虫区分能力、早期监测能力以及通过多源数据构建星空地协同的森林虫害遥感监测系统等发展趋势。为森林虫害遥感监测研究提供一种新思路。     

Constructing organization network for community-oriented collaborative product design

Community-oriented collaborative design is an emergent form of collaborative product development, in which the range of collaborative partners extends to wide area community members. It is difficult to construct the organization network because the accurate features of the wide area community members are hard to access. Aiming at this problem, an organization network constructing method based on bidding mechanism is proposed. First, the bidding process based on contract net with confirmation protocol (CNCP) is presented. Then, considering the false profit declared by the bidders, a multiple rounds bidding process combined with genetic algorithm (GA) is used to get the best sub-projects allocation scheme, in which the total payment of sub-projects is minimal and the project due time is satisfied. A case analysis shows that the method can eliminate the false profit declared by the bidders and provides an operable way to construct network organization for community-oriented collaborative design.     

Global Chain,Local Pain: Regional Implications of Global Distribution Networks in the German North Range

ABSTRACT As a consequence of global production networks (GPNs), the associated network of freight distribution has gained increasing significance. Whereas the volume of freight transport is expected to increase further, the supply of infrastructure for the movement and handling of consignments appears limited. Particularly at the interfaces, infrastructure capacity for coping with rising throughput is extremely scarce. Any attempt to widen bottlenecks seems to be risky because it happens at some cost and in a contested political and urban environment. This problem will be discussed in the case of the German North Range, with the Port of Hamburg as the traditional gateway and main port, and a scattered system of secondary interfaces and supporting logistics areas. Local constraints, port competition, and the network logic of global distribution systems are challenging the former monopoly of the port, as are plans for establishing a new deep‐sea port at Wilhelmshaven, 150 km west of Hamburg. At the same time, the traditional policy approach of adapting to the needs of the distribution system is coming to an end, owing to fiscal limits, infrastructure constraints, and the generic logic of the global supply chain. In accordance with the emerging global division of labor, various actors and institutions are involved in the management of the chain, with very different powers and interests. Under these circumstances, the attempt to ensure the main port's position by infrastructure expansion is becoming open to question. This could also be a starting point for rethinking how local and regional places could better respond to the new imperative of logistics and distribution. In this respect, it is the network paradigm that could lead the way to a more balanced, cooperative and competitive regional distribution system.     

Chaos Synchronization of Continuous Systems for Different Systems Parameters

Because parameter disturbed exist every practical system,so chaos synchronization for different system parameters is availabe. Chaos synchronization of continuous system for different system parameters is studied with the relation between chaotic synchronization and asymptotic stability, parameter adaptive and driving feedback. Lorenz system is used to verify the effectivenss of the proposed method,and the simulation results confirm it.     

Loads Equalization Based on Optimization Principle and the Hierarchical Model for Distribution Networks

Loss reduction is important for distribution networks and it is available to reduce loss by loads equalization. With increasing numbers of vertexes in distribution networks, compounding of loads are rapid increasing. It is hard to achieve the global optimization for load balancing by traditional model of distribution networks. Base on analyzing character of loads equalization for distribution networks, this paper provides a new method which conjugate the optimization principle and the hierarchical model of the distribution networks, can transfer the optimization issues into multi stage decision making problems,and can also achieve the optimization equalization of the distribution networks loads.     

Dynamical Idnetification for Blast Furnace Condition

The correlation dimension for the time series of blast furnace process varisble,such as blast volume, burden pressure drop and blast pressure etc.,have been estimated by using GP and modified GP algorithms.The predictublity analysis for the process variables have also been investigated.The results show that it is difficult to determine the chaotic attractor of blast furnace condition.It has been found that the predictablity for process variables can be used to niterpret and identity the precursor of biast furnace condition.     

当前构建中国新农村和谐社会的思考

建设社会主义新农村,构建农村和谐社会是中国目前需要解决的迫切问题。笔者分析了中国目前构建农村和谐社会的主要障碍和可行性,提出了构建中国农村和谐社会需要改变执政观念,实现政府职能转变作保障;需要加大对农村的投入,大力发展农村经济作支撑;需要加强农村精神文明建设来助推,同时提出构建农村和谐社会要依靠科技进步,发展效益农业;要完善农村社会保障制度,解决农民后顾之忧;要加快农村剩余劳动力向城市转移,弱化转移农村矛盾的思路。     

未培养微生物筛选高纤维素酶活性基因的研究进展

纤维素是地球上最丰富的可再生有机资源,利用微生物产生的纤维素酶将其分解对于人类社会解决环境污染、食物短缺和能源危机具有重要的现实意义。在自然界中存在着大量的无法用传统方法培养的未培养微生物,通过构建宏基因组文库,从中筛选纤维素酶基因,为纤维素酶的筛选提供了一条新的筛选途径。综述了未培养微生物研究现状、宏基因组学的研究和从未培养微生物中筛选纤维素酶基因的研究,为进一步研究纤维素酶提供了理论依据。     

甜菜SCoT-PCR反应体系的建立及优化

旨在利用SCoT分子标记技术为甜菜指纹图谱构建、遗传多样性分析以及其他分子标记辅助育种提供技术支持。本研究利用单因素实验优化了甜菜SCoT-PCR反应体系。结果表明,在20 μL反应体系中,甜菜SCoT-PCR最优反应体系包含2.0 μL的10×PCR buffer（含Mg² ）、10 ng的DNA、0.5 U的Taq DNA聚合酶、10 μmol/L的引物2 μL以及0.1 μL的dNTPs (2.5 mmol/L each)。利用优化后的程序对12份糖甜菜品种进行扩增,结果表明,该体系扩增结果稳定、条带清晰,可用于甜菜品种指纹图谱的构建以及其他分子生物学领域的研究。