查询词典 continuous dynamical system

In orde to obtain system optimization in high efficiency production and operation safety, the microcosmic problem of goaf treatment was brought into the creative design of mining method and the synergism of two problems was studied. Firstly, in view of the occurrence characteristics and mining conditions of catacalstic ore section of orebody No. 105 in Gaofeng mine in Guangxi province, considering the adaptability to different scale goafs in the ore section, based on mining environment reconstructing idea and continuous mining mode, a new mining method (mining environment reconstructing non-pillar sublevel-strip continuous mining method) was put forward. Then, some repr, esentative goafs were selected and their stabilities were calculated by discrete element method on the basis of differences of goaf scale, surrounding conditions and situ stress field. At last, the mining layout was adjusted on the basis of goafs stability analysis and the goafs were adjusted as a part of cutting engineering, blasting space or stope, so as to determine all kinds of goafs treatment schemes.

摘 要：为在生产高效和作业安全上取得系统整体最优，将碎裂矿段的空区处理微观问题纳入采矿方法创新设计宏观问题中，开展2种问题的协同研究：首先，针对广西高峰矿105号矿体碎裂矿段的赋存特点和开采技术条件，考虑对各种规模空区适应性，基于采矿环境再造和连续采矿理论，提出采矿环境再造无底柱分段分条连续采矿法；然后，根据采空区规模、围岩状况和原岩应力场等条件的差异，在所有采空区中选择具有代表性的空区，运用离散元程序对其稳定性进行计算分析；最后，在稳定性分析的基础上，灵活调整开采布局，将采空区调整为部分切割工程、自由爆破空间或采场，从而确定出各种规模空区的处理方案。

Owing to the complex construction of continuous girder bridges,which is laboursome and time-consuming,people have been thinking about an approach to combining the advantages of the two so as to speed up the building and reduce the work procedures. Thus the "simply-supported-continuous system" is introduced.

但是由于现浇连续梁的施工复杂繁琐、费工费时，人们一直希望将简支梁的批量预制生产和连续梁的优越性能结合起来，用梁或板批量预制生产的方式来加快连续梁的建设速度，以省去繁琐的支模工序，由此产生了将整跨梁板预制、架设就位后在端部浇筑混凝土并张拉预应力使之连续的&先简支后连续&施工法，而形成的体系则被称为&先简支后连续结构体系&。

In fact, multi-box girder bridge is different from T-beam multi-girder bridge. First, transverse distribution of load is influenced quite with the closed box beam; Secondly, as a simply-supported—continuous system, its 3-d structure behavior is remarkable, especially for a continuous skew bridge.

事实上，多箱式桥梁与T梁桥有很大的不同，其一是作为主要承重构件的梁为闭口箱梁，对荷载的横向分布有较大的影响，其二是采用先简支后连续的体系及桥面板的现浇湿接缝连接，其空间受力特征非常显著，对于具有斜交角度的桥梁更是如此。

From the viewpoint of the sedimentation,we have set up the deposition model of A/B system FGM and analyzed the possible interfaces of FGM in theory,and h ave also given corresponding solutions.The article has laid a foundation for FGM with continuous or quasi-continuous compositions by sedimentation.

从颗粒共沉降的立场出发，建立了A/B系FGM沉降模型，并从理论上对用共沉降法制备A/B系FGM时，材料内部可能出现的界面情况进行了分析，提出了解决方案，为用共沉降法制备组成成份连续或准连续分布的FGM提供理论依据。

Further more, we get the necessary and sufficient conditions for the two-dimensional discrete system, where the permanence and extinction of the system are decided and only decided by the relationship of the non-delay coefficients in the system. Further, we for the first time find the equivalent permanence and extinction between the two-dimensional discrete Lotka-Volterra and its corresponding continuous system.

进一步，本得到了此类离散系统二维自治情形下，其持续生存和灭绝分别等价于系统非时滞系数构成的相应不等式；通过比较本文中二维自治Lotka-Volterra竞争系统的连续和离散两种情形的有关结论，首次发现这两类系统具有等价的持续生存和灭绝性质，建立了这两类系统之间的联系。

In this article two functional modes of the Fly-back Converter (Continuous Conduct Mode and Discontinuous Conduct Mode) are particularly analyzed, which include their characteristics, applications, the critical pattern of two functional modes is argued, both the exact boundary from the angle of circuit parameters is crystallized, at the same time, basic principle of PFC under the DCM mode is introduced, which settle theoretical basis for the subsequent design; by establishing the mathematic model of the converter, a further investigation of the configuration is made, qualitatively and quantitatively, analyzed to settle exactly theoretical basis for the subsequent emulation and the experimental parameter; from the angle of steady-state analysis, the transfer function of the system is deduced to establish dynamic small-signal state equation, emulating the system with the help of matlab, then according to the simulation result and the theory of PFC revise the system, lastly, we adopt the project which add a zero-pole compensator to the voltage loop, by this way, a satisfied system performance is gained and the PFC scheme is ensured successfully; finally, based on the previously-done work, we combining with the situation of specific design requirement, acquired the numerical value of each unit devices in this converter

详细分析了反激式变换器的两种工作状态，连续模式(Continuous Conduct Mode ，简称CCM)和断续模式(Discontinuous Conduct Mode，简称DCM)以及各自的特点、应用场合，论证了两种工作状态的临界模式，从电路参数的角度明确了二者的界限，同时还介绍了DCM模式下PFC的基本原理，为后面的设计奠定理论基础；通过对整个变换器系统建立准确的数学模型，对此变换器的电路结构做了进一步的研究，定性、定量地分析了变换器各部分的工作状态，为仿真和实验参数的确定以及电路参数的优化提供理论依据；从稳态分析的角度，为系统建立了动态小信号状态方程并推导出系统的传递函数，利用matlab对系统进行仿真，进而根据仿真结果以及PFC的相关理论对系统进行校正，采用在电压环加入零点—极点补偿器的设计方案，得到了满意的系统特性并且保证了PFC的顺利实现；最后，在前面所做工作的基础上，结合设计要求计算出此变换器系统中每个元器件的数值，利用Pspice对其进行了仿真、优化，然后根据仿真结果搭建了硬件电路。

The topologies and operating principles of power supply and control system are introduced. Based on the continuous hereinbefore two-year operations of control system, control system characteristics are analyzed and control system saving investment/energy/resource specific effects are researched.

论文介绍了供电系统和控制系统的拓扑结构和工作原理，以控制系统连续运行两年多的实际状况为基础，分析了控制系统的特点，研究了采用该控制系统所带来的节约投资、节约能源资源的具体效果。

Since the company was founded, with accurate market positioning, rapid feedback, agile management thinking, be bold to introduce scientific research personnel, quickly established independent scientific and technological innovation system, the combination of international and domestic technological advantages, better suited to the Chinese market product positioning, and capture the market opportunities and won the trust of our customers, to become one of Huatai Machines China dyeing machinery industry the most complete product varieties, the most technologically advanced, the most superb quality manufacturers and one of the most competitive brands Enterprises, through strict implementation of ISO9001 international quality management system standards and 14001 international environmental management system standard, established based on continuous improvement of the quality management system, ends in September 2006, the company has ISO9000 quality OIA member of the staff has more than 70

公司创立以来，以准确的市场定位，快速的信息反馈，敏捷的管理思维，大胆引进科研人才，迅速建立起自主科技创新体系，结合国际，国内技术优势，以更适合中国市场的产品定位，抢占市场先机，赢得广大客户的信赖，使华泰印染机械一举成为中国印染机械行业产品品种最齐全，技术最先进，质量最精湛的制造商和最具竞争力的品牌之一企业通过严格贯彻ISO9001国际质量体系管理标准和14001国际环境体系管理标准，建立起了基于持续改进的质量管理体系，截止2006年9月，公司具备ISO9000内审员资质的员工已达70余名

The double logarithm curves represents two down concaves, the cross flow comes from cave system to fracture system and the equivalent triple continuous medium channels to the fracture system and cave system.

所绘制的双对数导数曲线表现为2个下凹部分，分别表征溶洞系统向裂缝系统的窜流，等效连续介质向裂缝系统、溶洞系统的窜流。

Third chapter illustrate the design scheme for justification development system, amalgamation steer the argumentum;And code design in the detailed design sum the database design of whole system;Recommended the detailed design information of sum of the shuttering cake structure of the aetioporphyrin system;Analyzed the library to manage the system's appliance demand, according to the database design theory proptosis of one-step and one-step earth joint system demand manual, local ER general view, overall situation ER general view, system relation modal, leaven the modal;Arrangement in parallel proptosis the valve key source of the said system code in the procedure the amalgamation commit the interpretation, justification.

第三章说明开发系统的设计方案，并进行论证；以及详细设计中的代码设计和整个系统的数据库设计；介绍了本系统的模块结构和详细的设计信息；分析了图书馆管理系统的应用需求，按照数据库设计理论一步一步地给出了系统需求说明书、局部ER图、全局ER图、系统关系模式，子模式；并列出了该系统的关键源程序中的代码并做解释、说明。

Must have Coordination and negotiation skill, flexible ideas, and be punctilious person.

必须具备较好的协调与谈判能力，头脑灵活，工作认真仔细

Result: 18 patients are all with simple eye.The pigment mole lies in nasal and temple sides of the ball conjunctiva,in which 2 lie in lacrimal caruncle and semilunar plica.

结果：18例患者均为单眼，色素痣大多数位于内外侧睑裂部球结膜面，2例位于泪阜及半月皱襞，经激光治疗后，10例色素痣消失，有5例行再次激光后消失，2例行第三次激光后消失，1例第四次激光后消失。