完全系统

Based on varying process of generator terminal parameters after excitation fault, shortages of excitation protective principle of static stability boundary and asynchronous impedance boundary are analyzed. It proposed that excitation fault research relates to large-disturbance stability. Because dynamic power-angle character of generator after excitation fault is non-sinusoidal, there are differences between dynamic power-angle character and static state power-angle character. So it isn't ideal to protective operation result based on small-disturbance stability and static stability boundary criterion. At the same time, it proposed that asynchronous boundary impedance criterion is a constant reactive power circle moving adown j Xd′. It can ensure complete loss-of-excitation generator measuring impedance enter into the circle, but can't ensure the other condition measuring impedance including impossible losing synchronism enter. So loss-of-excitation protection would be maloperation when system voltage drops short and recovers or generator rejects load.③Based on stability principle, it puts forward setting conditions and calculation method of generator loss-of-excitation protection by direct measuring power-angle.

以励磁故障后发电机端的相关参数的变化为基础，通过对以静稳定边界和异步阻抗边界作判据的两类三种现行励磁保护在原理上存在的缺陷分析，发现：励磁故障是一个大干扰稳定性问题，励磁故障后的发电机的动态功角特性与静态功角特性有很大的差异，已远非正弦曲线，因此基于小干扰稳定性原理、以静稳定边界作判据的保护必然动作不理想；异步边界阻抗判据是一个下移j Xd′的等无功阻抗圆，它可以保证完全失磁后的发电机测量阻抗能进入该阻抗圆，但不能保证完全失磁之外的其它状态不会进入该阻抗圆，因此在系统电压短时下降或发电机突然甩负荷等情况下可能启动该保护使之误动。

Moreover, when a design is pronounced incorrect by model checking methods, a counterexample is reported.

而模型检测方法是一种有效的完全自动的形式验证方法，它可以完全自动的验证系统模型是否满足某种属性，并且在不满足时，能找出导致错误的输入路径。

How to quantitatively determinate the relation between system behaviors and parameters variations was an important problem of systems biology.In order to study robustness of NF-κB signal transduction networks,the parameters of system model were assigned to subject to stochastic distributions.

然而，包括速率常数和反应物初始浓度在内的许多参数都是通过实验测量或者根据文献推断得到的，即使对于那些完全通过实验来估计参数的模型，也不能确定参数的实际值与对应的生物系统是否完全一致。

The system dynamics is used to make the simulation about the differential game under the condition of complete information and incomplete information.

以系统动力学为工具，通过模拟的方法求解完全信息和不完全信息情况下微分博弈的均衡策略。

This method based on characteristic that resistance dynamic and both resistance sides information incompletion,Combine with information acquisition of network decoy system and incompletion information dynamic gambling.

该方法基于对抗的动态性及对抗双方信息不完全的特点，把网络诱骗系统的信息获取和不完全信息动态博弈有机结合起来。

Glycolate oxidase (EC 1. 1. 3. 1, GO) was purified by 137. 4 fold from leaves of Brassica campestris L. ssp. chinensis var. utilis and the specific activity attained 130.9 U/mg. protein. Chromatography of purified GO through Sephadex G-200 showed two symmetric peaks of both protein and activity, which overlapped fully with each other. Further with electrophoresis on agrose plate, a protein spot and an activity spot were detected in electrophoretogram after respective staining, and the spot of protein covered that of activity, which indicated that the purified enzyme was of a high quality.

从菜心叶片中纯化了乙醇酸氧化酶，比活性达130.9 U／mg，纯化倍数为137.4倍；纯化酶经Sephadex G-200凝胶过滤显现单一而对称的蛋白吸收峰和活性峰，且两者完全重叠；进一步经pH 8.3缓冲系统的琼脂糖平板电泳、染色，各在负极端出现一个活性斑点和蛋白染色斑点，且两者的位置完全对应；表明纯化的菜心叶片乙醇酸氧化酶已达到较高的纯度。

Judging from the ralationships between wood structure and systematic anatomy, the wood structures laurel family were transition.

从樟科木材结构特征与系统演化关系看出：樟科木材结构表现为过渡型，即不完全低级，也不完全进化。

Both LDPC codes and OFDM technology are studied in this paper. The working and the results obtained are summarized as follow:1. The definition of LDPC codes and its coding/decoding ideas are systematically summarized, a general algorithm of changing any parity-check matrix to lower triangular form, which is suitable for quick encoding, is given out, along with a girth checking algorithm. Absolutely random LDPC codes construction is improved, a new half random construction of LDPC codes with linear time coding and no 4-cycles is brought out.

系统地阐述了低密度校验码的定义及编译码原理，提出了一种将任何校验矩阵变换成适于快速编码的近似下三角形式的通用算法及一种围长检测算法，对完全随机的校验矩阵构造法进行了改进，提出了一类消除4环且可近似线性编码的校验矩阵半随机构造法，仿真表明，在高编码效率情况下，改进后的半随机构造法，其性能稍优于完全随机构造法，并可以线性时间编码，因此更适合实际应用。

Summary: PowerDesiger is " one station type " Modeling and solution designed, Offer ocular symbol for all kinds of data models say , is it manage and visit effective structure , project of information to offer to user, the integrated characteristic is flexible, is that the most popular software analyses the design tools at present, Its characteristic:(1)Modeling solution of complete integration of providing a whole set of for network analysis and designing for all IT users;(2)Modeling of the data;(3)The strong document blocks and customizes and produces the function automatically;(4)User totally self-defining yuans of mould plate;(5)Take result as the direction , regard data as the business treatment models of the centre;(6)Have offered it to all UML pictures and omni-directional support in all main platforms;(7)Have offered many kinds of modeling technology in the single environment based on resources bank;(8)Have offered the performance in common use for models and targets , expand attribute and script to deal with;(9)Incorporate the intact edition and control the function.

摘 要：PowerDesiger是"一站式"建模与设计的解决方案，为各类数据模型提供了直观的符号表示，向用户提供管理和访问项目信息的有效结构，集成特性灵活，是目前最为流行的软件分析设计工具之一，其特点：(1)为所有IT用户提供了一整套用于系统分析和设计的完全集成的建模解决方案；(2)数据建模；(3)强大的文挡定制自动生成功能；(4)用户可完全自定义的元模型板；(5)以结果为导向、以数据为中心的业务处理模型；(6)提供了对所有UML图及所有主要平台的全方位支持；(7)在基于资源库的单一环境中提供了多种建模技术；(8)为所有模型和对象提供了通用性能、扩展属性和脚本处理；(9)融入完整的版本控制功能。

All the functions and the operational habits in the older system were preserved and the responding speed was accelerated at the same time. In addition, the new system was enhanced with system condition display function and equipped with industrial Ethernet for further upgradings in production management.

新系统完全保留了原系统的全部功能及操作习惯，响应速度更快，并增强了系统运行状态信息显示功能，而且具备工业以太网接口，为生产管理升级预留了空间。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。