In light of the elastic thin plate theory , the author induced equilibrium differential equation of bi - direction cellular slab , which was proved correct through analysis and comparison to result of ansys to with theoretical calculation . through the deflection and bending moment coefficient calculation of bi - direction cellular slab under various boundary conditions , the author brought forward the theory that the deflection of mid - span and bending moment coefficient calculation of mid - span and support of bi - direction cellular slab could be in accordance with solid plates " , which could satisfy the precision of engineering 本文根据弹性薄板理论，导出了双向空腹板的平衡微分方程，并通过理论计算和通用有限元程序ansys结果对比，验证了其正确性；通过对各类边界条件下双向空腹板挠度和弯矩系数的计算比较，本文提出：双向空腹板跨中挠度及跨中、支座弯矩可使用本文空腹板刚度公式查找现有的实心板挠度弯矩系数表进行计算，完全能满足工程精度要求。
Aiming at the relativity between repeated or similar samples and characteristic parameters during diagnosis of characteristic data , an effective data analysis approach for characteristic data compression from bi - direction is presented , which can reduce the burden of learning machine without losing the connotative characteristic knowledge of characteristic data 摘要对诊断特徵数据中重复或相似事例样本和特徵参量之间可能针存在的相关性，提出一种有效的特徵数据双向压缩预处理方法，该法在不损失数据隐含的特徵知识的前提下，能有效降低学习机器的学习负担。
Starting from virtual work principle , with the combination of fem , the author led into elastic stiffness practical formulation of bi - direction cellular slab . after comparing the bi - direction elastic stiffness formulation with the approximately stiffness formulation , the author drew such a conclusion that if the hole - rib is comparatively big , the elastic stiffness of bi - direction cellular slab calculated by approximately formulation would be comparatively small , and therefore the elastic stiffness could calculated by the formulation illustrated in this paper 本文从虚功原理出发，结合有限元方法，给出了双向空腹板的弹性刚度实用计算公式，并与近似刚度公式进行对比分析，并得出结论：在双向空腹板孔间肋较大情况下，利用近似公式计算双向空腹板的弹性刚度偏小，可按本文提出的弹性刚度公式进行计算。
The author , applying the program of ansys , built a nonlinear model of rc bi - direction cellular slab , and , from the comparison of equivalent - span and equivalent - thickness solid plate , drew several important conclusions . meanwhile he also pointed out that the stiffness of cellular slab would become weaker because of the holes of cross - section which make the tare weight 40 % down comparing to solid plate , but if the weakness of tare weight was considered , the cellular slab still remained the excellent features of integration and stiffness , by which the cellular slab can be put into use of large - span 本文利用有限元程序ansys ，建立了钢筋混凝土双向空腹板的非线性计算模型，并和等跨等厚度实心板进行分析对比，从而得出了一些重要结论，指出：在空腹板自重比实心板减少40左右后，空腹板的刚度虽然由于截面的开孔而削弱，但考虑自重减少后，空腹板仍表现出整体性好、刚度大的特征，从而实现较大跨度楼板的工程应用。
On the basis of summarizing the existing large - span slab structure forms , the author developed the existing circular voided slab into a new large - span slab system , rc bi - direction cellular slab , which , specialized itself as bi - direction from a macro point of view , could not only reduce the tare weight of slab , but also expand slab span 本文在总结已有大跨度楼板结构形式的基础上，提出了一种新型的大跨度楼板体系? ?钢筋混凝土双向空腹板，该类楼板体系是现有圆管式空心楼板的延伸，不仅能减轻楼盖自重、增大板跨，而且还具有宏观上双向性的优点。
The security request of the mobile - agent system is to protect the agent from the attack of the malicious machine and agent as well as to protect the machine from the attack of the hostile agent . hierarchical integratedsecure model in jade provides effective , extensible security framework for mobile agent by integrating bi - direction authentication , authorization , java security policy , environment based key generation , and audit log Made移动代理系统的层次化的集成安全模型在现有的安全技术基础上，将双向身份验证、资源存取授权及控制、 java语言安全设施以及基于环境的密钥产生法和核查日志等方法有机地结合起来，为移动代理和运行环境提供了一个实用的可扩展安全环境。
Then , according to the previous algorithm , we design and implement an mpls multicast rerouting mechanism , which consist of building a bi - direction multicast routing tree backup path , detecting the link failure , notifying the link and recovery . under the environment of mpls - linux , the author also studies traffic - driven mechanism of mpls and pim - sm , and also gives the readers a vista of the future of mpls multicast 本文在mpls - linux环境下，还对以数据流为驱动机制的mpls和组播路由协议pim - sm的结合进行了有益的探索，并且为实现支持组播的lsr的解决方案打下了基础，并对该论文的未来的工作进行了展望。
About the study of the h . 264 / mpeg4 - avc standard , this thesis describes almost all the modules of the h . 264 / mpeg4 - avc . and then , based on the study of the codec , a decoder is redesigned from a decoder which only supports baseline profile to a new one which can support main profile . the most important difference between the two decoders is : the introductions of the bi - direction predict decoded technology 在h . 264 / mpeg4 - avc标准研究方面,本论文详细讲述了h . 264 / mpeg4 - avc标准规定的各个解码模块,并在此基础之上,实现了把一个仅支持baselineprofile视频流的解码器,重构为一个可以支持mainprofile的视频流的解码器。
In the end , the author used fem to analyze the short - period stiffness after rc cellular slab cracking , and presented recommended formulation in respect of short - period stiffness . moreover , with regard to the features of bi - direction cellular slab , the author brought forward the equivalent cross - section stiffness model to calculate the ultimate load - carrying capacity of variable cross - section slab as well as the related reinforcement suggestions and conformation methods 最后本文利用有限元分析了钢筋混凝土空腹板在开裂后的短期刚度，并给出计算其短期刚度的建议公式；另外针对双向空腹板的特点，本文提出了对这种变截面板进行承载力计算的“等效截面刚度法”模型，并给出了相关的配筋建议及构造措施。
In this research arcims4 is chosen as development platform , and its structure and communication mechanism are analyzed to prepare for developing chinese coast spatial data query web site in techniques . on the basis of the collecting literature , the china coast research document database is established . using asp and arcims4 the china literature database query web site is constructed , and the spatial and attributive bi - direction query of literature is realized successfully 本研究选用arcims4作为空间数据网络发布的开发平台，并剖析了arcims4的体系结构和信息的传递机制，为建立中国海岸带空间数据查询系统站点作技术上的准备；在收集大量中国海岸带及近海的文献的基础上，利用access建立中国海岸带及近海研究的文献数据库，运用asp语言和arcims4构建中国海岸带文献空间数据查询系统网站，成功实现了对文献的空间和属性的双向查询和发布。
