查询词典 three-wire system

After study security mechanism and several acess control model of operating system, compare the three odel, propose if combine the three model, it will be beneficial to confidentiality and integrity of Operating System.

介绍了操作系统的安全机制和几种访问控制模型，在对模型进行比较的基础上，提出采用多种模型相结合的方法，能够满足操作系统保密性与完整性要求。

This thesis firstly analyzed related theories on independent innovation system of Private Scientific and Technological Enterprises; secondly described the status quo and developing trend of independent innovation of Private Scientific and Technological Enterprises in China; thirdly determined objectives and characteristics of independent innovation system of Private Scientific and Technological Enterprises, put forward three ways for independent innovation of Private Scientific and Technological Enterprises, they are direct way of wholly independent innovation, outflanking ways based on cooperation innovation and imitation innovation; fourthly made "structure-function" analysis for independent innovation system of Private Scientific and Technological Enterprises, clarify system operation mechanism; finally this thesis used the theory and method of System Dynamics modeling for independent innovation system of Private Scientific and Technological Enterprises.

论文首先对民营科技企业自主创新系统相关理论进行研究；接着描述了我国民营科技企业自主创新现状与发展趋势；然后确定了民营科技企业自主创新系统的目标、特点，将民营科技企业自主创新的实现途径分为完全自主创新的直接途径和基于合作创新和模仿创新的迂回途径；并对民营科技企业自主创新系统行&结构-功能&分析，阐明民营科技企业自主创新系统的运行机理；最后应用系统动力学的理论和方法对民营科技企业自主创新系统进行建模。

The secondary root number per plant of Yumai No 49,a mi d-s trength quality wheat,is the smallest among the three varieties except the winte r stage but its root system quality is the best;the intensity of reducing TTC an d the activity of SOD of fresh wheat root are the highest during the period fro m winter stage to flag leaf stage.Since flag leaf stage,its physiological charac ters are weaker and have bigger variation during whole stage.The secondary root number per plant of Yumai No 50,a soft quality wheat,is the biggest except duri ng winter stage,and its dry weight of root of single plant is the heaviest in ev ery stage.Before 19th,March,its intensity of reducing TTC is the weakest and dec reases abruptly after flag leaf stage,but its activity of SOD decreases slowly.R oot dry weight per plant of Yumai No 34,a high quality wheat,is the smallest amo ng the three varieties and its root system quality is the weakest.Before jointin g stage,the intensity of reducing TTC is stronger,but after that,it decreases sl owly though it is smaller,and the activity of SOD decreases slowly in every stag e.

中筋小麦豫麦49号除越冬初期外，其它各时期单株次生根条数均为最少，单株根干重介于豫麦34号及豫麦50号之间，单根质量高；越冬初期至挑旗期，根系活力、根中SOD活性均强于其它两个品种，挑旗后，根系生理活性较小，整个生育期根系生理活性变化幅度大；弱筋小麦豫麦50号除越冬初期外，其它各时期单株次生根条数均最多，单株根干重各时期均为最大；拔节前根系活力最弱，挑旗后根系活力下降幅度较大，根中SOD活性较强且各时期变化幅度不大；强筋小麦豫麦34号，单株根干重最小，根系质量最差；拔节前根系活力较强，拔节后根系活动较弱，下降速度缓慢，根中SOD活性各时期变化幅度较小。

This paper studies the global topological structure of a kind of plane homogeneous fifth system with three special direction Suppose the system has are only one finite singular point (0,0), then we can assume b50=0, which special directions are determined by equation G=0, introduce Poincare transformation to discuss infinite singular points, according to the coefficient conditions, list all possible infinite singular points and special directions, judging their type, drawing out all kinds of phase portraits when it has three special direction.

研究了一类平面齐五次系统当其只有唯一的有限远奇点且具有三对特殊方向时的全局拓扑结构及系数条件。假设系统只有唯一的有限远奇点(0，0)，不妨设b50=0其特殊方向由示性方程G=0给出，引进poincare变换研究无穷远奇点，再根据定理中的系数条碎，列出系统所有可能的无穷远奇点和特殊方向，并判断其类型，由此画出系统具有三对特殊方向时的全局相图。

Taller three oxidates wolfram of test first of all by means of calcines APT''s system is get pureness ,Afterwards separately after oxidate and reduction ,The wolfram restores to the wolfram powder through three oxidates ,The gains wolfram powder again oxidate is three oxidates wolfram ,Restore queen after twice oxidates ,The gains stuff pellet is more and more carefully ,Finally obtain sub－micron yardstick three oxidates wolfram .

实验首先通过煅烧APT制取了纯度较高的三氧化钨，然后分别经过氧化和还原，由三氧化钨还原为钨粉，所得钨粉再氧化为三氧化钨，经过两次氧化还原后，所得材料颗粒越来越细，最终得到亚微米尺度的三氧化钨。

The following is the research frame of this dissertation:Chapter one: Introduce background, research significance, research object, research contents and methods of this dissertation; review the history of clusters theoretical research in detail; dissertate main research dynamic status of domestic and international;Chapter two: Through explain theoretical foundation of cluster research, it defines and demarcates clusters, introduces the concept of private enterprises" cluster on this basis, and summarizes current situation of Quanzhou private enterprises" cluster;Chapter three: Propose the concept of cluster competitiveness, collect and analysis those factors which influence cluster competitiveness, and set up an appraisal system of private enterprises" cluster competitiveness;Chapter four: Define developing stages of private enterprises" cluster with clusters" dominance competitiveness, analysis characteristic and law of private enterprises" cluster in different life cycle, give out strategic countermeasures separately which promote cluster competitiveness in different stage;Chapter five: On the basis chapter three and chapter four, propose what we can use cluster strategic planning to promote Quanzhou cluster competitiveness; and recommend thought of cluster strategic planning;Chapter six: Introduce the case of Quanzhou sports shoes cluster, use competitiveness appraise system and life cycle theory for empirical analysis, and put forward detailed countermeasure that can promote cluster competitiveness;Conclusion: Summarize the research of full dissertation, and point out some weaknesses of this dissertation.

本文的研究框架如下：第一章：介绍本文选题的背景、研究意义、研究对象、内容与方法，并详细论述集群理论研究的历史回顾及当前国内外主要研究动态；第二章：通过阐述产业集群研究的理论基础，定义及界定产业集群，在此基础上引入民营企业产业集群的概念，并归纳总结了泉州市民营企业产业集群的现状；第三章：提出产业集群竞争力的概念，对影响集群竞争力的因素进行分析，初步建立一套民营企业产业集群竞争力的评价体系；第四章：应用集群显性竞争力来界定民营企业产业集群发展的生命周期阶段，并分析民营企业产业集群在各个不同生命周期阶段呈现的特征及规律，分别给出在不同阶段提升集群竞争力的战略对策；第五章：在第三、四章的基础上提出应用产业集群战略规划来提升泉州民营企业产业集群的竞争力，并介绍了集群战略规划的思路；第六章：引入泉州运动鞋产业集群的案例，应用本文构建的集群竞争力评价体系及生命周期理论进行实证分析，并提出提升该集群竞争力的详细对策；结论：总结全文的研究，并指出本论文研究的一些不足之处。

The aptitude and career interest were considered as the two dimension of the entrance guide system, and was proof-tested by the structural equation model, which results supported this two-dimension hypothesis. Accordingly, there were two parts in the guide system. One part was about the aptitude test, consisted of seven subtests: verbal reasoning, spatial imagining, mathematic reasoning, computer capacity, abstract reasoning, physical knowledge, and sentence recomposing. The other part was about the career interest test, including eight aspects: career longing, curriculum desire, entertainment after school, activity preference, job preference, work environment preference, self-estimate of one\'s abilities, and discuss future with someone else. After three times modification and testing, the psychometric indices of the guide system were become well and stable. Furthermore, the guide system was primarily launched into applying, with four typical case studies, the practicability and serviceability of the guide system was showed swiftly.The entrance guide system for junior high school students that was developed in this research was one-upping in the entrance guide field in China.

第二阶段是初中生升学指导系统的研制阶段，以能力倾向与生涯兴趣这二元因素作为初中生升学指导系统的基本架构，经验证性因素分析表明该二元架构是合理并可接受的；其中能力倾向部分共包含语言推理、空间想象、数学推理、电脑能力、抽象推理、物理知识、语句重组等七个分测验，生涯兴趣部分则包含生涯梦想、课程兴趣、课余爱好、活动偏好、工作内容喜好、工作场所喜好、能力自评、与他人讨论未来等八个方面；通过三次修改与测试，结果显示所研制的初中生升学指导系统有着良好的测量学指标；此外，通过对初中生升学指导系统的初步应用研究，并结合典型个案的深入剖析，进一步表明所研制的初中生升学指导系统具有实用性、操作性强的特点，所得结果也可靠可信。

The aim of this dissertation is to develop a system of basal theories and techniques for three-dimensional GIS based on visualization technology, which resulted from a through studying of the theories on GIS upbuilding and developing and resulted in a three-dimensional visualization system platform.

本课题的目的是通过对地理信息系统的建设和开发理论深入进行研究，建立一套基于可视化技术的三维地理信息系统模型基本理论和方法，并以此为基础实现一个三维可视化系统平台。

Because there are many types of components, it selects components appropriately based on the demand of products. This system is made up of the mode of coating paper with rollers, drive system composed of steel net supported and three drivers, dryness system composed of oven with air floated and drying um with electric tubes, synchronous control system with the positions of strain rollers. And it developed an appropriate software of control system. This system achieves demands of operation, stabilization, continuity and high efficiency.

由于涂布系统中各部件存在多种类型，根据生产产品的品质要求对涂布系统各部件进行了选型，最终选择了门辊涂布方式，采用钢网支撑，三电机控制的传动形式，结合气浮式烘箱以及电热管加热的烘缸组成的干燥系统，张力辊位置为控制对象的同步控制系统，同时设计了一套相应的软件控制系统，以实现连续稳定高效的生产要求。

To accomplish the intelligent control of the three-axis numerical control system of the boring and milling machine tool based on IPC ,the research makes good use of the intelligence sport control card PCL-839 and PCLD-782/785 card to design the control system of the three-coordinate NC machine tool with the framework of embedding NC in PC.

为实现基于工控机 IPC 的三坐标印制电路板数控钻铣床的智能控制，研究运用PCL-839运动控制卡和信号输入输出卡PCLD-782/785，采用NC嵌入PC式结构设计该三坐标印制电路板数控机床的控制系统，以实现对该数控机床的控制。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。