可扩充性

In new algorithm, it is not necessary to calculate grey-level threshold for each X-ray image which is inevitable in Bentz el als method. So the new algorithm is more general, computational and error tolerance.

经对比发现，新算法能达到与Bentz等人的算法相同的分割精度，可以扩充，并且不需要确定各X-射线图像的灰度阈值，具有更强的通用性、可计算性和容错性。

To support secure group communications in resource constrained wireless sensor networks, We propose an efficient and scalable key management scheme which only uses symmetric cryptographic algorithms and hashing function. This scheme can achieve forward and backward security.

为了在有限资源的无线传感器网络能安全进行群组通讯，本文只使用对称加密算法和单向哈希函数提出了一种具有有效性和扩充性的组密钥管理方案，并可满足前向和后向安全性。

Then the types of upper sensors are determined. The CMOS chip AT89C2051 is used in this system because there is only a small quantity of program to be stored. This system uses wireless transmission module D21DL to form the network of wireless transmission. In this way, such disadvantages as low removability and expansibility and longtime construction are avoided. Digital filtering method is applied to improve anti-jamming performance.

由于程序存储量较少，现场的CPU选用ATMEL公司的低档型芯片AT89C2051；为了避免采用有线数据传输导致的系统可移动性差、系统扩充性能差和系统布置线缆繁琐、施工周期长等缺点，本系统采用了无线数据传输模块D21DL构成系统无线网络传输；同时设计了包括电源电路、显示电路、存储电路和报警电路等构成系统的所有电路。

Several experimental applications have been developed finally. In this paper, there areinnovations from the following four aspects:1. Definition and research methods of current distributed system and distributedinteractive simulation system follow those of traditional parallel computing system.While this paper points out it is one-sided to measure the scalability just from thenumber of processors and performance of a system, because the resources of distributed systems are heterogeneous and they can be used in diverse applications. Inthis paper, scalability of distributed interactive simulation platform is defined as theability of scaling (including scale-up and scale-down) in functionality and performanceof systems which is run on the platform when number of processors and otherhardware resources such as network change, i.e. when problem size is scaled up and system resources is increased, the performanceremains fixed and it is easy to expand the functions of simulationapplications.

本文的创新工作主要体现在下述4个方面：1、现有的分布式系统和分布式交互仿真系统可扩性的定义和研究方法都沿用了传统的并行计算系统可扩性的定义和研究方法，本文指出分布式系统的系统资源异构多样、应用种类丰富多样，只从传统方法采用的处理机资源和性能角度衡量一个系统是否可扩是有一定的片面性，提出了分布式交互仿真平台可扩性的定义是在处理机和网络等系统资源变化时，运行在平台上的分布式交互仿真系统在性能和功能方面发生扩缩的能力，即当问题规模扩大时，增加系统资源，系统能获得指定的性能及在功能方面能方便进行扩充。

The platform is designed with open structure and component design to enable its upgrade and maintenance in the future. The use of cross platform C# language will further enhance its transformability.

所建立的系统以开放式的架构与组件化的设计来提升系统之扩充性与维护性，并使用跨平台的语言技术C#来实际系统，以增进系统的可移植性。

In order to meet the needs of combining the total database system and the future development of system. The system should have the abilities of extensibility, maintainability and good transplantability. Using the model based on distributed multilayer structure can solve the problem above efficiently.

同时，为了满足与工程总数据库系统的衔接及系统将来发展的需要，工程勘测管理信息系统应当具有可扩充的能力和可维护的能力，以及应当具有很好的可移植性，而采用分布式多层结构模型正好可以有效地解决上述问题。

The system can be used in universal test and its software is easy to replanted and extended.

系统具有测试通用性，测试软件可移植性和扩充性强的特点。

Virtual Instrument is the product of modern surveying and computer technology, and it uses digital technology and software to improve the flexibility and expandability of the test.

它是现代测量技术和计算机技术结合的产物，用数字化和软件技术提高测试的灵活性和可扩充性。

The expandability and maneuverability of the system are improved.

在系统中设计了各种辅助功能模块和友好的人机界面，重点解决了系统的可扩充性和可操作性问题。

At the same time, the design of CAPP system also must consider the reuse ability of the system so as to improve the Service life and the expandability of the system.

同时CAPP系统的设计也必须考虑系统软件的复用能力，以提高系统的使用寿命，改善系统的可扩充性。

What are your goals and strategies for growth?

你的成长目标和策略是什么？

And unto the angel of the church in Sardis write; These things saith he that hath the seven irits of God, and the seven star I know thy works, that thou hast a name that thou livest, and art dead.

3：1 你要写信给撒狄教会的使者，说，那有神的七灵和七星的，说，我知道你的行为，按名你是活的，其实是死的。