孤东油田稠油开采配套技术及应用

孤东稠油油藏具有油层埋藏浅，泥质粘土含理高，油层岩石胶结疏松等特点，粘度分布范围宽，开采过程中出砂严重，断块分布零散，开采难度大，结合稠油油藏特点和开采中存在的难点，综合配套油层保护，防砂，降粘和机采等工艺，提高稠开发效果。     

初轧机主传动系统扭转自激振动的稳定性

用变量摄动法对初轧机主传动系统扭转自激振动的稳定性进行了初步研究，讨论了稳定性条件，为初轧机打滑状态的诊断、监测提供了参考依据。     

卫星数字广播的发展优势

详细介绍卫星数字化的发展、数字卫星广播制式DVB-S.     

报业广告管理系统的设计与关键技术

基于集散式的数据库存储、三层软件架构、中间件、智能Agent、数据仓库及在线分析、图形图像处理等多项技术而开发的广告管理系统是报业营运的核心应用软件，是支撑报业取得经济效益的重要工具，文中重点阐述了其总体设计方案与关键技术。该系统在技术上的几项突破改变了报业传统生产方式，解决了多项长期困惑业界的难题，行业带动性强，已在实际应用中取得了显著的经济效益，具有在全国报业广泛推广的价值。     

超低渗广谱油层保护技术在板深51区块的应用

板深51区块存在压力敏感地层，在非目的层井段存在大段高渗低压砂岩，而目的层又属于高压低渗地层，属于难采油气田。室内进行的砂床滤失量、砂床封堵带承压能力、岩心封堵带的承压能力及油气层保护效果实验表明，在超低渗钻井液中增加固相含量，能够提高超低渗透膜结构强度，提高地层承压能力，降低砂床侵入深度，增强保护油气层效果，而且有选择性地增加有用固相效果更佳。基于这一理论，研究成功了超低渗广谱屏蔽暂堵油层保护技术，并在板深51区块长22—15井和长23—17K井进行了试验应用。该技术的关键是依据地层特性确定复配暂堵剂。长22-15井和长23-17K井射孔后未经过压裂、酸化、排液处理，获自喷高产，尤其是长22-15井形成自喷油流，创油田单井试采产量最高记录。应用结果表明，超低渗广谱保护油气层钻井液技术封堵隔层的承压能力强，很大程度地提高了漏失层的承压能力和破裂压力，较好地解决了含多套压力层系长裸眼段钻井过程中发生的漏失、井喷、卡钻、油气层保护等技术难题。     

Energy Minimization for Real-Time Data Gathering in Wireless Sensor Networks

This paper studies the challenging problem of energy minimization for data gathering over a multiple-sources single-sink communication substrate in wireless sensor networks by exploring the energy-latency tradeoffs using rate adaptation techniques. We consider a real-time scenario for mission-critical applications, where the data gathering must be performed within a specified latency constraint. We first propose an offline numerical optimization algorithm with performance analysis for a special case with a complete binary data gathering tree. Then, by discretizing the transmission time, we present a simple, distributed on-line protocol that relies only on the local information available at each sensor node. Extensive simulations were conducted for both long and short-range communication scenarios using two different source placement models. We used the baseline of transmitting all packets at the highest speed and shutting down the radios afterwards. Our simulation results show that compared with this baseline, up to 90% energy savings can be achieved by our techniques (both off-line and on-line), under different settings of several key system parameters     

Efficient Legendre moment computation for grey level images

Legendre orthogonal moments have been widely used in the field of image analysis. Because their computation by a direct method is very time expensive, recent efforts have been devoted to the reduction of computational complexity. Nevertheless, the existing algorithms are mainly focused on binary images. We propose here a new fast method for computing the Legendre moments, which is not only suitable for binary images but also for grey level images. We first establish a recurrence formula of one-dimensional (1D) Legendre moments by using the recursive property of Legendre polynomials. As a result, the 1D Legendre moments of order p, L_p=L_p(0), can be expressed as a linear combination of L_p-1(1) and L_p-2(0). Based on this relationship, the 1D Legendre moments L_p(0) can thus be obtained from the arrays of L₁(a) and L₀(a), where a is an integer number less than p. To further decrease the computation complexity, an algorithm, in which no multiplication is required, is used to compute these quantities. The method is then extended to the calculation of the two-dimensional Legendre moments L_pq. We show that the proposed method is more efficient than the direct method.     

105K工作温度的多元长波光导碲镉汞探测器

文章报道了空间多光谱扫描仪红外波段多元光导碲镉汞探测器的研制与优值。重点研究并解决了多元器件光谱曲线不一致性的问题，简述了器件的优值波段响应率RΔλ1，波段探测率DΔλ和单色响应率Rλ的测试定标方法，以及器件按空间环境使用要求经历老炼和环境条件试验的情况。测试结果表明多元件性能稳定可靠，各项指标均达到了空间多光谱扫描仪的技术要求。     

喷雾沉积快速凝固技术的发展与展望

喷雾沉积是制取大体积快凝材料的一种新工艺。本文综述了它的产生和发展，概述了其基本原理和过程控制。对该领域今后的发展动向，提出了一些新看法。