以军品制造为契机 全面提升公司质量管理水平

在承制重点型号产品的前期阶段，公司适时修编了质量体系文件，使对质量体系有效运行起重要作用的各个场所都能得到相应文件的有效版本；形成了自我发现、自我约束和自我改进问题的质量监督机制。保证质量体系运行的适宜性和有效性；选择了合格的分供方，减少配套产品采购风险；实施了各方联手的质量培训，全面提高员工的素质，从而维系了按照GB／T19001—1994(idt ISO9001：1994)和GJB／Z9002—96质量保证模式建立起来的质量体系正常运转，取得了良好的质量效果。     

实施对分承包方的控制

根据ISO质量标准要求，实施对分承包方的控制是一项重要的课题。本文通过翔实生动的事例和多角度的论证，反映了公司分承包方质量体系审核组在公司各级领导和有关部门的关心、支持与配合下，对分承包方质量体系进行审核诊断、改进提高以及咨询认定。从而改变了分承包方的面貌，提高了质量保证能力，为向公司供应优质产品、减少采购风险提供了保障。     

Network security situation prediction based on improved adaptive grey Verhulst model

Network security situation is a hot research topic in the field of network security. Whole situation awareness includes the current situation evaluation and the future situation prediction. However, the now-existing research focuses on the current situation evaluation, and seldom discusses the future prediction. Based on the historical research, an improved grey Verhulst model is put forward to predict the future situation. Aiming at the shortages in the prediction based on traditional Verhulst model, the adaptive grey parameters and equaldimensions grey filling methods are proposed to improve the precision. The simulation results prove that the scheme is efficient and applicable.     

AutoCAD二次开发绘制锥坡平面曲线

在公路桥梁桥台采用锥坡形式时,如果桥梁为斜交,或台前、台侧放坡坡度不同时,正确绘制平面曲线存在一定难度。从探讨锥坡平面曲线的特性入手,利用VBA二次开发,实现在AutoCAD软件中自动绘制锥坡坡脚曲线的功能,在设计中具有一定的实用性。     

钢筋混凝土箱形拱桥施工控制

为使拱桥达到理想的成桥状态,结合岭兜特大桥工程,对采用预制拱肋、缆索吊装施工的钢筋混凝土箱形拱桥,利用结构有限元分析,根据倒装-正装计算法对施工过程中结构的受力特性和变形进行预测,施工控制中对主拱的应力、线形、扣索的索力等进行监测.结果表明:在拱肋吊装过程中拱轴线变化与计算一致,拱肋合龙后各控制点的实测高程与控制高程之差、轴线偏位均满足相关规范要求;主拱圈典型截面上的实测应力值与计算应力值接近;扣索实测索力与计算索力基本吻合,岭兜特大桥达到了理想的成桥状态.     

Bi-slotted binary tree algorithm with stack for radio frequency identification tag anti-collision

A radio frequency identification (RFID) reader will fail to identify tags if a collision occurs. This paper proposes a bi-slotted binary tree algorithm (BSBTA) with stack for RFID tag anti-collision to improve the performance of binary tree algorithm (BTA). In BSBTA, the reader detects collisions by Manchester code and stores colliding prefixes in a stack. The query is composed of a two-bit prefix and an index value. Following every reader query, there are two timeslots for tags whose pointers and identities (IDs) match the query to respond, one for the tag whose next bit is 0 and the other for the tag with 1 as its next bit. Performance analysis and evaluation are also given. The time complexity and the communication complexity of BTA and BSBTA are derived. The simulation results compare the performance of BSBTA with several related anti-collision algorithms. It is shown that BSBTA outperforms BTA in terms of the average number of responded bits and timeslots for one tag identification.