绿色化皮革清洗保养剂及皮革制品保养工艺的研究

选用无毒、无害、易生物降解的清洗、加油、灭菌材料进行优化配伍,研制出集去污、滋润、防霉等多功能的环保型皮革清洗保养剂;对各种皮革制品的水洗清洁法及保养工艺进行了科学的研究.     

拖拉器在水平井生产测井中的应用

文章介绍了水平井拖拉器的基本结构及性能指标；总结了使用拖拉器进行水平井生产测井的测并工艺：介绍了在塔里木油田水平井生产测井的实际应用情况，给出了测井解释结果。     

Array公司SSL VPN夺标中石油

石油业在信息化系统建设方面一直着眼于提高效率,希望无缝满足当前和未来的业务拓展需要。其业务不断拓展和多元化,要求信息系统整体提供更高的访问,必须为勘探和生产活动的顺利进行提供全面的保障。无论从地理特性还是业务拓展的需求上,石油行业都需要高效的应用访问能力,避免     

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。     

Phase Transformation Introduced by Mechanical and Chemical Surface Preparations of Tetragonal Zirconia Polycrystals

Cutting of Y₂O₃-doped TZP rods by a low-speed diamond saw introduces an unidentified, metastable phase X (x -ZrO₂) coexisting with the tetragonal ( t -ZrO₂) and the monoclinic ( m -ZrO₂) phases initially present in the sample. Further mechanical deformation of the cut surface by indentation or polishing sustains the x -ZrO₂. Chemical etching removes the x -ZrO₂ and increases the m -ZrO₂content.     

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。     

一种“绝对型”电容薄膜真空计的研制

介绍用磁控溅射制作的从大气往真空约覆盖5个量程的“绝对型”电容薄膜真空规，以及与该真空规配套的真空计的电路。该真空计测量范围为1．3～105Pd，真空规与电容信号检测电路置于同一金属壳内，以避免外界干扰。规的恒温胜温度波动小于±0．1℃，有效地降低了温度的影响。电路的非线性小于0．4％，高真空下北输出漂移小于0．1％，在13～105Pa各量程内，最大校准误差小于读数的4％。