The test methods for 60-channel symmetrical cable carrier telephone equipment high - frequency channel

GB/T4770.3-1984 对称电缆60路载波电话设备主要性能的测试方法

In this paper based on the concept of adaption the Cost-Evaluating Symmetrical Reversible Variable Length Codes ( C-E SRVLCs ) which can be used for Joint Source Channel Coding ( JSCC ) are constructed through a user-defined cost function .

应用自适应的思想，由一个自定义的代价函数构造出一种适合于实现联合编译码的变长码&代价测评 对称可逆变长 码。

The main hypnoses of the models are as follows : a leading manufacturer a single product a single period complete and symmetrical information linear demand function linear supply function of used products average fixed cost of channel cost et al .

模型的主要假设是制造商主导、单一产品、单周期、信息完全且 对称、需求量是需求价格的线性减函数，回收量是回收价格的线性增函数，销售和回收的单位 渠道成本固定等。

The system used the reflex optical systems and spectral modulation method designs completely symmetrical double channel test system .

本系统采用反射式光学系统利用分光调制法设计了完全 对称的双 通道测试系统。

This paper discusses the algorithm that can build security channel based on symmetrical encryption algorithms for network communication security channel is applied in authentication of identity and consultation of keys advantages of this algorithm are analyzed in detail .

讨论了基于 对称加密算法DES的安全信道建立策略，该安全 信道能实现通讯双方的认证和加密密钥的协商，并分析了该算法存在的不足。