中子辐照对彩色CMOS图像传感器性能的影响

对一种彩色互补金属氧化物半导体(CM0S)图像传感器芯片进行了反应堆中子的辐照实验研究,利用图像分析软件分析了辐照前后芯片的暗输出图像的平均暗输出、暗输出不均匀性和动态范围等参数;与γ射线辐照很不相同,中子辐照器件的暗输出图像上出现许多大而密的斑点和条纹,图像上有很多白点和白点串;经过长时间室温退火后的图像质量没有明显改善.文章初步探讨了CMOS图像传感器的辐照损伤机理.     

Further stability analysis on Cohen–Grossberg neural networks with time-varying and distributed delays

The article is concerned with asymptotical stability for Cohen–Grossberg neural networks with both interval time-varying (0?≤?τ₀?≤?τ(t)?≤?τ _m ) and distributed delays, in which two types of distributed delays are treated: one is bounded while the other is unbounded. Through partitioning the delay intervals [0,?τ₀] and [τ₀,?τ _m ], and choosing two augmented Lyapunov–Krasovskii functionals, some sufficient conditions are obtained to guarantee the global stability by employing the simplified free-weighting matrix method and convex combination. These stability criteria are presented in terms of linear matrix inequalities (LMIs) and can be easily checked by resorting to LMI in Matlab toolbox. Finally, three numerical examples are given to illustrate the effectiveness and reduced conservatism of the theoretical results.     

基于自适应加权与LZW的WSNs层次式数据融合算法

为了兼顾提高数据采集精度与效率的同时有效降低传感器节点能耗,提出了一种基于自适应加权与LZW的层次式数据融合算法.传感器簇头节点对传感器节点发送的数据进行自适应加权处理,估计出均方误差最小时的值,簇头节点将处理后的数据采用LZW算法以一定的信息量压缩后再进行数据的传输.仿真表明,该层次式融合算法提高了数据采集的精度并有...     

《产能建设数据库》系统的设计方法

介绍产能数据库的设计方法，以及动态数据的分析、计算和处理过程。     

广义倍数原理及其应用

本文提出了广义倍数原理,大家熟知的“柯氏倍数原理”只是它的一个特例。用它可使更多的受侧力多跨多层刚架简化为单跨多层刚架来计算,大大地扩大了倍数原理的应用范围。     

渤海油田科学钻井试验及分析

根据系统工程和价值工程原理，借鉴泰国湾优快钻井经验，提出了适合渤海油田钻井特点的快节奏作业方式和激励性管理模式。介绍了９项配套的钻井技术和５项规范的管理方法。渤海油田３项科学钻井试验的结果表明，采用新的技术和方法能显著提高钻井速度和降低钻井成本，必将促进海洋油气勘探和开发水平的进一步提高。     

On-line control flow error detection using relationship signatures among basic blocks

Computer systems operating in space environment are subject to different radiation phenomena, whose effects may lead to a control flow fault occurring in software system, which can cause unpredictable behaviors of computer-based systems. According to the specialty of space environment, We propose a technique called RSCFC (Relationship Signatures for Control Flow Checking) which is based on the partition of programs into basic blocks. Firstly, it exploits the relationship among the blocks, then assigns a signature, into which the relationship is coded, to each basic block. Control flow faults are detected through taking AND operation between the run-time signature and the location info of the current block with extra instructions induced at the beginning and the end of each block. A fault injection experiment was performed with several C benchmark programs. The result suggests that about 33% (20.7-68.8%) of the injected branching faults produced undetected incorrect outputs without RSCFC; however, with RSCFC, the above number declines to 11% (2.8-20.4%). Compared with previous techniques, RSCFC has the characteristics of both high fault coverage and low memory and performance overhead.     

亚磷酸氢钙生产工艺研究

讨论了一种制备亚磷酸氢钙的新方法，并在实验室条件下制出了纯净白色的亚磷酸氢钙产品，产品收率达９８％。     

纯棉织物新型高效活性染料冷轧堆染色工艺探讨

从生态化和节能化的角度探讨了棉织物印染生产中采用的节能环保高固色率的Cibacron C型活性染料高效短流程冷轧堆染色工艺。在染色生产的全流程中贯彻了“节能减排、生态环保”的思想。     

中置型车刀的对刀辅具设计

为降低数控车床对刀过程中存在的误差,在分析误差存在的原因后,设计完成了中置型车刀的对刀辅具。该辅具在实际生产中,可降低人为因素引起的对刀误差,有助于提高零件的加工精度。