This paper has significance theoretically and practically in the choosing of system mode and choosing of developing tools , in the reducing of the developing circle of information system , in the improving of the life - circle and adaptability to the different management requirement , and in the improving of flexibility and security 文章对合理选择系统模式和开发工具，减少信息系统开发周期，提高信息系统对不同管理要求的适应力和生命周期，以及提高信息系统灵活性和安全度具有一定的理论和现实意义。
Through experimental research , the calculation formula that the pressure highly - adjusted capacity of two cylinder chambers varied with the change of step load and the formula about hydraulic elements main parameter ( rated pressure ) were both made , which had important valuation in selecting the main parameter about this hydraulic system 通过试验研究得出了出口节流调速系统中液压缸两腔压力超调量随负载变化的计算公式以及出口节流调速系统中液压元件主参数(额定压力)计算公式，有利于正确选择系统的元件及主参数。
Aiming at product development process , three detail problems are analyzed and investigated deeply , namely a method for the choice of product development project , risk analysis in the concurrent product development process , and the policy of market entry . firstly , a new integrated method for the choice of product development project is presented ， integrating absolute concentration curves and analytic network process . the paper establishes a model for the choice of product development project including network subsystem , emphasizes the product portfolio management , especially the relativity of the presented product and the new product 针对产品开发项目的选择方法提出了一种综合评判方法，集成绝对优势曲线方法和网络分析法，建立具有网络子系统的产品开发项目评价选择系统模型，着重考虑了新产品与现有产品的相关性；在产品并行开发中的风险分析方面，以分析两阶段并行开发的时间函数和成本函数为基础，建立时间风险和成本风险模型，以两者的加权和为目标函数；在产品投放市场策略方面，从分析投放时机和投放市场的规模选择入手，建立了综合投放策略模型，提出四种投放策略分别适用于四种类型的企业，并且指出市场投放策略要兼顾投放后的应对策略，包括资源供给问题和后继产品开发问题。
According to the particularity of mobile search system , it chooses a suitable mode to show the result for mobile users . our smsbms system ’ s service orientation is : providing short information retrieval for mobile users and optimizing the service of frequent search . then we finish the request analysis of smsbms system 本文从实际应用的角度出发,根据移动搜索系统的特殊性,选择系统的服务方式,提出我们所开发的smsbms系统的服务定位? ?为移动用户提供简短信息的检索服务、优化高频查询的服务质量,同时对smsbms系统进行需求分析。
