需求

The goal of Charta 21 is to satisfy the economic, environmental, and social needs of our society.

如何处理好汽车的更大需求与环保需求之间的矛盾？

It points out that the domestic supply capacity of chromite resources is not steady while the international dependence is increasing; as a result, it is suggested that attention should be focused on developing a sustainable and secure supply.

随着我国全面建设小康社会、国民经济持续快速发展对不锈钢消费需求的增加，我国对铬铁矿的消费需求将持续增长，供需差距不断扩大。

In the context of consumer culture, in the cofunction of the profit-making of mass media and consumers' demand of entertainment, the free "meaning production" has become the core element of the entertaining events in media.

在当下消费文化语境中，在大众传媒的利益需求和娱乐消费者消费需求的共同作用下，自由的"意义生产"成为促成传媒娱乐事件的核心因素。

"It is defferent from making the system integration service with selling the product, it must have the complete customer demand solution, and it is able to earnest in the competitive tender blooming from solving the customer physical demand."

"做系统集成业务与单卖产品不同，要有完整的客户需求解决方案，切实解决客户的实际需求才能在竞标中脱颖而出。"

Firms need to know the cross elasticity of demand for their product when considering the effect on the demand for their product of a change in the price of a rival's product or a complementary product.

第一，通过需求交叉弹性，生产者可以知道对自己产品的需求会因其它产品价格变化可能引起的反应。这将有助于企业制定自身的价格策略；有助于分析与各种产品之间有联系的风险问题。

The thesis studies the difference between GWSs composition and traditional workflow applications, proposes the implement mechanism and technical architecture of GWSs composition and defines the reference model of GWSs composition platform, which provide holistic framework and top-level guidance for studying dynamic GWSs composition technology, designing GWSs composition platform, and implementing representative composite service applications.2、Theories and methods of composite process modeling and process analysis. This thesis proposes a meta-model of Geo-spatial Web services composition process defining from two aspects, i.e. process and resource. According to the process definition meta-model, we propose a new Geo-spatial Web services composition Process/Resource model based on extended WF-net, which effectively resolves the problems on uncertain activity option and dynamic variation of service in composite process model. A notion with regard to soundness of process model is proposed from three aspects, i.e. the structural correctness of process model, validity of data link and validity of resource. The notion of soundness definitely gives a dividing line on correctness of composite GWS process. This thesis analyzes sufficient and essential terms of soundness, and studies compositional property of WSCP/R-net models which provides an effective method to construct a soundness WSCP/R-net model. According to WSCP/R-net, the thesis proposes composition algebra and studies the properties of it. Based on the composition algebra, 6 kinds of composite process reduction rules are induced to optimize the process.3、Geo-spatial Web service QoS model and its application architecture. This thesis proposes an extendable GWS QoS model from three aspects, i.e. Geo-spatial Web Service itself, networking conditions and service consumer which can be used to distinguish GWSs with overlapping or identical functionality. We work over the QoS evaluation methods of composite GWS process which can be used to guide the execution, monitor and service selection of composition process. Aming at some disadvantages in traditional Web service discovery model for its lacking of QoS supporting, this thesis proposes a new service discovery model SDMQ supporting QoS constraints.4、Technologies of composite service executing. SSPL, a new composite service process language, is defined to overcome the disadvantages of existing composite services process languages which can not adapt to the dynamic variation of Geo-spatial Web Services. An algorithm is described to translate WSCP/R-net model into SSPL. The thesis studies the model of dynamic services selection with QoS global optimization, presenting an algorithm GODSS to resolve dynamic services selection with QoS global optimization in GWSs Composition.5、Design and implement experimental system and representative applications. According to the research findings presented above, we design and implement an experimental system and construct two representative applications to show that our achievements are effective and practical.

针对当前空间信息服务聚合研究中存在的若干不足，本文重点在基于工作流的空间信息服务聚合框架、空间信息服务聚合流程建模和分析技术、空间信息服务QoS模型及应用体系以及空间信息服务聚合流程执行等几个方面进行深入研究，主要工作和创新点包括：1、基于工作流的空间信息服务动态聚合框架：研究了空间信息服务动态聚合和传统工作流应用的不同，在此基础上提出了基于工作流技术的空间信息服务动态聚合实现机制、技术体系和参考模型，为研究空间信息服务聚合的关键技术、开发服务聚合支撑平台以及在此基础上构造特定的空间信息服务聚合应用提供了总体框架和顶层指导。2、空间信息服务聚合流程建模和分析技术：首先基于动态服务聚合流程建模的需求和空间信息服务动态变化的应用实际，从服务聚合的过程维和资源维出发定义了服务聚合流程定义元模型；与之相对应，对基本的WF-net进行扩展，提出服务聚合流程/资源网作为空间信息服务聚合流程的形式化描述模型，有效解决了现有的基于基本Petri网和工作流网的服务聚合建模方法所不能解决的不确定路径选择和服务的动态变化性问题；从流程结构正确性、数据依赖有效性和资源实现有效性三个方面提出了WSCP/R-net健壮性的概念，明确界定了聚合流程正确性的标准，并对WSCP/R-net模型的健壮性分析方法和WSCP/R-net模型的组合特性进行了研究；提出了空间信息服务聚合代数算子并对其性质进行了研究，在此基础上提出了6种聚合流程约简规则，从而可达到优化聚合流程、提高聚合流程执行效率的目的。3、空间信息服务QoS模型和应用体系：从服务本身、网络环境和服务消费者三个层次出发，提出了一个可扩展的空间信息服务QoS模型GSQM，实现了对空间信息服务的度量和评价，并对GSQM不同质量要素信息的客观、公正采集方法进行了研究；研究了空间信息服务聚合流程QoS评价方法，有效支持了空间信息服务聚合流程的执行、监控以及服务选择等操作；针对目前的服务发现模型仅支持服务功能性描述、不能有效满足空间信息服务应用需求的现状，提出了一种新的支持QoS约束的服务发现模型SDMQ，并对模型的实现框架进行了研究。4、空间信息服务聚合流程执行技术：针对现有的服务聚合流程描述语言不能有效满足空间信息服务动态聚合流程描述的特点，基于BPEL4WS提出了一种新的空间信息服务聚合流程描述语言SSPL；研究了满足健壮性要求的WSCP/R-net模型向SSPL的转换算法，在此基础上可以满足用户无显式编码来实现空间信息服务聚合应用的目的；研究了服务动态选择QoS全局优化模型，并在此基础上提出了一种解决服务动态选择QoS全局优化问题的实现算法GODSS.5、基于论文研究成果，设计实现了"空间信息服务聚合实验系统"，并构建了"矿产资源评价"和"城市消防应急响应"两个典型应用案例，对论文所述模型、方法的可行性和有效性进行了验证。

From the angle of functionally income distribution, in developed modern capitalism production system, with the promotion of organic composition of capital, production departments such as industrial manufacturers are difficult to produce high profit.

从功能性收入分配的视角来看，在成熟的现代资本主义生产体系中，随着资本有机构成的提高，工业制造等实业部门难以生产出高额利润；从规模性收入分配的视角来看，美国收入分配不平等的程度加深，严重地制约了消费需求的进一步提高，生产与需求之间的矛盾日益明显。

Another critical reason not to conflate requirements with features is that in figuring out the best way to meet a particular human need, an interaction designer has an extraordinary amount of leverage to create a powerful and compelling product.

不要混淆"功能"和"需求"这两个概念的另一个关键原因，是因为交互设计师通常有异常多的方法来创建强大且有竞争力的产品，我们需要在这诸多方法中找到最好的一个来满足特定的用户需求。

Demand Side Management technology is becoming more and more important in dealing with the confliction of power supply and consumption.

近年来，电力需求侧管理为缓解电力供需矛盾创造了条件，更多的人开始接受需求侧管理的理念。

We see a few websites that had crossed a company, the sense that gives a person is concise palpability, consecution clarity.

您是我们的客户，我们考虑您的需求，同时，我们更要考虑您的客户的需求。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。