Based on the hybrid / mixed element method of piezoelectric laminated , a piezoelectric multilayer element is developed , in the piezoelectric multilayer element , the continuity of transverse stresses of at interfaces between layers is naturally ensured . 3 . by the use of iso - function method , stress modes of 8 - node three - dimensional solid element made of on - axis orthotropic material are derived 依据一般层合板杂交元理论知识，提出一个压电层合板多层单元，利用压电层合板子层间的表面参数，使压电层合板的层间应力的连续性得到自然满足，并对压电层合板进行杂交元列式。
In the study of the effect of electric field on the binding property of copper foil - covered veneer sheet , because of lack of experimental method and the complexity of the object studied , it is not found the regular effect of electric field on the binding strength between copper foil and veneer sheet or on the inter - laminar binding strength of veneer sheet . but it is further testified that dc electric field makes the free linkage generated during solidifying of epoxy resins orient along the direction of electric - power line 在直流电场对覆铜箔板粘接性能影响的研究中，由于受实验手段和研究对象复杂性的限制，没有发现直流电场对覆铜箔板铜箔与基体及基体层间的粘接强度产生规律性影响，但在研究中进一步证实了直流电场会使环氧树脂在固化过程中形成的交联键沿电场方向取向。
Based on the description of main functions and relationships among the layers , the author aimed at voice information related protocols through the interface of pstn in ums , and proposed to supply ums service by two application - oriented protocols , called the trdp ( telephone related dialogue request protocol ) and the takp ( telephone related protocol between layer a and k ) . in this project , the author was mainly involved in specification and implementation of the trdp and the takp 通过对各层的主要功能及层间关系的描述，针对ums涉及的pstn接口中的语音类信息，提出通过trdp (服务请求对话协议， telephonerelateddialoguerequestprotocol )和takp (辅助层与核心层间的通信协议， telephonerelatedprotocolbetweenlayeraandk )这两个专用应用协议来实现ums对电话类终端的服务。
