查询词典 grid current

Although the measures such as the simulation method with detailed generator model in which the dynamic behavior of exciting system is taken into account and installing power system stabilizers in main generators of Northeast Power Grid were adopted, it was still unable to effectively verify the reasonableness of parameter setting of PSS as well as its integrated matching result, and there was not enough scientific foundation for the selection of power grid model, especially load models. Moreover, it was hard to make accurate quantitative analysis, even though the qualitative analysis, on the close extent of selected models to actual operation of power grid.

虽然采取了计及励磁系统动态行为的详细发电机模型的仿真方法、在东北电网重要发电机组上加装电力系统稳定器(power system stabilizer，PSS)等措施，但PSS参数整定的合理性及整体匹配效果无法得到有效验证，选择电力系统模型尤其是负荷模型还缺乏足够科学依据，对所选模型与电网运行实际的贴近程度也很难做出准确的定量甚至定性的分析。

Aiming at the problem that the payloads of local servers are tempestuously fluctuating along with the movement of amount of on-line user in the video grid of multilevel architecture because the absence of temporary servers,the video grid of mixed architecture based on the video grid of multilevel architecture and the peer-to-peer technology is produced to transmit video stream data between the normal clients directly.

针对可扩展视频网格结构中，由于加盟服务器数量不足所引起的区域服务器负载波动随在线用户数量变化过大的问题，引入P2P技术构造混合结构的视频网格，实现普通客户端之间视频流数据的直接传输。

A new approach for pattern recognition of ultra-high frequency signals of transformer partial discharge based on multi-scale analysis of wavelet packet and grid dimensionality is proposed, in which the multi-scale transform of wavelet packet is used to extract wavelet coefficients of UHF PD signals and by means of improving difference box-counting method the grid dimensionality of multi-scale wavelet coefficients is calculated and the multi-scale grid dimensionality is taken as the characteristic quantity that is used in the recognition of UHF PD signals.

提出了一种基于小波包多尺度分析和网格维数的变压器局部放电超高频信号模式识别的新方法，采用小波包多尺度变换提取局部放电超高频信号在多尺度上的小波系数，通过改进差盒计数法计算多尺度小波系数的网格维数，并将多尺度网格维数作为特征量用于局部放电超高频信号的识别。

The sixth part: Studies on the dynamic changes of soil retention function value of ecosystem in YUYANG District. Utilized ERDAS8. 5 to interpret the remote sensing image and get LUCC data and vegetation information of YUYANG District. Utilized R2V5. 5 to digitize administrative map, topographic map, vegetation picture, soil distribution map and meteorological website map. Utilized ARCINFOR8. 3 to change every digitization layer to the same projection, to generate Tyson polygon, to structure DEM and do vector polygon overlay. Utilized ARC VIE W3. 3 to obtain the grid data topographic slope and slope length from DEM data of YUYANG District, and then, turned every coverage layer into grid layer and do grid polygon overlay to gain data about dynamic changes of value of soil retention of ecosystem in YUYANG District, at last, the author analyzed the features of the spatial-temporal changes and its reason.The seventh part: Studies on the dynamic changes of fixing drifting sand against wind function value of ecosystem in YUYANG District.

第六部分：榆阳区生态系统土壤保持功能价值动态变化研究；利用ERDAS8.5对遥感数据进行解译获得榆阳区土地利用数据和植被信息，利用R2V5.5数字化榆阳区政区图、地形图、植被图、土壤分布图及气象站点分布图，利用ARCINFOR8.3对各数字化图层进行投影转换、泰森多边形生成、DEM构建和叠加分析，利用ARCVIEW3.3从DEM数据中获取榆阳区的坡度、坡长面域数据，并将上述各图层格网化，然后通过栅格图层叠加分析和代数运算获取榆阳区生态系统土壤保持功能物质量和价值量时空动态变化数据，最后分析了其变化的时空特点及形成原因。

As web services and the thought of service grid are becoming mature,it becomes a trend that grid resources are capsulated by service,which is well accepted by grid field.

也就是说，网格计算关心的是&在动态的，多机构的虚拟组织中协调资源共享和协同解决问题&。

Some improvement on the original Poisson equation numerical generation grid method in which the control over grid concentrativeness partly lost due to the grid improvement on orthogonality was made.

在最初Poisson方程数值生成网格方法中对汇聚性的控制并不十分有力，因为随着迭代次数的增加，正交性得到改善，但离壁距离以及网格线分布难以保证。

The third tidal wave of IT industry is gestating from the beginning of the new century, which tries to interconnect all resources on Internet so that resource sharing and collaborating can be implemented in the scope of virtual organizations. Therefore, it is significant and valuable for both researchers and engineers to investigate grid computing technologies for large-scale business applications to support virtual organizations. Based on Meta Computing, orthodox Grid Computing and Peer-to-Peer Computing, the author explores fargoing grid computing methodologies, which incorporates middleware support at three levels, viz.

进入新世纪以来，信息产业的第三次浪潮开始孕育，它试图全面连通因特网上的所有资源，以最终实现灵活的虚拟组织范围的资源共享和协同工作。

A structured grid partitionfor full scale coal fired tangential utility boiler has been given in this paper. It hasa small amount of grids and can decrease false diffusion effectively as it is inagreement with fluid flow direction. Accurate simulating results can be gainedwith the grid partition. Inverse flows are captured near the wall at four corners incombustion simulating through the above grid and temperatures simulating agreewell with them measured.

对于大容量四角切圆锅炉的数值模拟，本文给出了一个可以有效减小伪扩散、流体流动方向与网格线方向一致、数目较少、计算精度较高的结构网格，该网格的数值计算结果清晰得捕捉到了四个角向火侧和背火侧靠近壁面处的小回流，而且计算温度与炉膛温度实测值较好的吻合。

The supporting technologies of network information security are summarized. The unitive authentication systems existing are analyzed in this paper; their virtues and shortcomings are discussed.2. About the distributed peculiarities of allied resource, the concept of alliance grid is established. The access control model of alliance grid is established by directive ideas of access control security of alliance grid. AG-RBAC model is set up in the basic of common RBAC, interbedded relations between roles are set forth.

针对制造联盟企业资源分布式的特点，提出了联盟网格的概念；根据联盟网格安全访问控制的指导思想，提出了联盟网格访问控制模型；在一般RBAC模型的基础上提出了基于角色的联盟网格访问控制模型，清晰的表述了角色之间的层次关系；初步分析了AG-RBAC的实现模式，重点讨论了角色定义和权限配置的实现方法。

The impacts of the ultra high voltage AC/DC grid on Fujian power grid are analyzed in this paper. The security and stability of Fujian power grid and the interactions among the AC and DC system are studied under the single/double faults of EHV AC transmission lines and monopolar/bipolar block faults of EHVDC system near converter station.

中文摘要：分析了交、直流特高压电网对福建电网安全稳定的影响，研究了特高压交流电网、特高压直流系统发生故障时福建电网的安全稳定性以及受端换流站附近交流电网单一或严重故障对直流系统的影响及系统安全稳定水平。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。