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Near the bifurcation point, the linear stability of difference differential equation which describes acoustooptic bistable systems is analyzed, the expression of resonance frequency and amplification multiple are given.

在分岔点附近，通过对描述布拉格型声光双稳系统的差分－微分方程进行线性稳定性分析，得到了系统对小信号放大时的共振频率，给出了放大倍数的表达式。

This paper describes the development of an adaptive window length algorithm based on the differential equation.

对基于微分方程的自适应窗长距离保护算法进行了研究。

The static model describes the relationship among user, permission and role and imports integrated inheritance to actualize the relationship between local role and global role. The dynamic model completes access control by session diffluence based on the static model. The actualization for the model is researched based on the analysis of the content and the rule of the model. A self-adapted RBAC wrapper based on agent model is presented according to the heterogeneous databases'demand for wrapper.

该模型比较全面地解决异构数据库系统的局部数据对象和全局数据对象的综合访问控制。I-RBAC模型包括静态模型和动态模型两个部分，静态模型主要描述用户、权限、角色（特别是全局角色与局部角色）之间的关系，动态模型是在静态模型中角色层次关系的基础上通过会话分流实现动态的访问控制。

This paper describes latest developments of polarization gratings polarization characteristics and grating diffraction theory.

介绍了亚波长偏振光栅的发展概况与最新研究进展，亚波长偏振光栅的特点及衍射理论，并分别对金属亚波长偏振光栅和介质亚波长偏振光栅进行了分析。

This paper describes the components and structure of advanced signaling system: Automatic Train Control system, analyzes the function and classification of its three subsystems: ATS, ATP and ATO, with emphasis on currently widely adopted ATC system-Quasi-Moving-Block signaling system, which works on coded digit track circuit, and discusses the operating principles of coded digit track circuit and the features of train control of Quasi-Moving-Block signaling system.

本文详细讨论了应用于城市轨道交通的先进的信号系统——列车运行自动控制系统的组成和结构，对其三个子系统：列车自动监控系统ATS、列车自动保护系统ATP、列车自动运行系统ATO的功能和分类进行了详细分析和比较。

This paper describes the design of a multi-functiond digital clock system.

介绍了多功能数字钟的系统设计。

For digital communication systems, bandwidth describes the capacity of the system to transport digital data from one place to another.

对于数字通信系统，宽带叙述的能力运输系统的数字数据从一个地方到另一个地方。

It describes the digital models of speech, endpoint detection, feature extraction in the process of speech recognition, and chooses the arithmatics and models of the application system.

对语音识别过程中的语音数字模型、语音的端点检测和语音特征提取等过程进行介绍，并确立本系统中所采用的算法和模型。

This article introduces a design principle and implementation method of a high-speed digitizer based on PXI bus technology. It describes the system composition from two sides of the hardware and software.

介绍了一种基于PXI总线的高速数字化仪的设计理论和实现方法，从硬件和软件两个方面详细介绍了系统的设计方法。

Diglossia describes a situation in which two very different varieties of language co-exist in a speech community, each with a distinct range of purely social function and appropriate for certain situations.

双言现象并存于同一语言社区、用途各不相同的语言变体，通常其中一种被视为高层次变体，具有文言文的特征，另一种则为口语式的低层次变体。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。