基于云模型和专家群体的C~4ISR系统效能评估方法

C4ISR系统是大型复杂的军事信息系统,在其评估指标中既包含可获得精确数值的定量指标,也包含难以量化的、模糊的、不确定的定性指标,难以对其效能进行准确的综合评估。在建立的某C4ISR系统的效能评估指标体系基础上,提出了基于云模型和专家群体决策的C4ISR系统效能评估方法。利用该方法,评估专家可根据不同的评估指标类型及自身认识和偏好,选择精确值、区间数或语言变量表示其评估结果。然后,将评估结果统一转换为云模型进行运算,得到C4ISR系统效能综合评估结果。通过实例表明该方法有效可行,评估结果符合客观实际,可提供合理的结论,对C4ISR系统的发展建设和改进具有一定的指导意义。     

PNN测井监测气液界面在马北一号注气油藏中的应用

马北一号油田为底水油藏,注水开发效果较差。为提高采收率,采用顶部注烃气重力驱技术理念,在油田首次开展了2个井组注气实验。及时掌握注气后气液界面移动情况,对于优化射孔生产方案具有较强的指导意义。PNN测井在套管井中监测地层气液界面具有较强的优势,主要通过长短源距探头计数率叠合,在气层出现较明显的离差进行判断和分析。在马北一号油田开展时间推移PNN测井26井次,及时掌握了试验井组气液界面运移情况和受效方向,为进一步优化生产方案提供了科学依据。     

全温超高速ECL双模预置分频器设计

本文叙述了全温(-55～+125℃)超高速ECL双模预置分频器的工作原理、电路设计、版图设计及研制结果,还简述了制作工艺。整个电路设计以提高电路工作速度和温度特性为中心,采用优化的开关电流分配、最佳的电路工作点设置、带温度补偿的电阻反馈网络结构和合理的版图设计,来提高工作速度和保证良好的温度性能。研制的÷8/9分频器,在全温范围内最高工作频率达600MHz以上。     

A modified transverse resonance method for the analysis ofmultilayered, multiconductor quasiplanar structures with finiteconductor thickness and mounting grooves

A modified transverse resonance method is presented for analyzing generalized multilayered, multiconductor quasiplanar structures with practical parameters such as finite conductor thickness and mounting grooves. Recurrence relations are obtained by using network theory for obtaining the overall transverse equivalent network. while the discontinuity involving the finite-thickness metal sheet and mounting groove is carried out by a field-theory-based multimodal variational formulation. The frequency behaviors of propagating, evanescent, and complex modes are obtained for several commonly used quasiplanar lines, showing good agreement with published results. Furthermore, a leaky-wave study is carried out for open structures, since the open condition can be included in this formulation without difficulties     

北萨哈林盆地走滑断裂对古阿穆尔河三角洲的控制和影响

北萨哈林盆地是俄罗斯远东地区重要的含油气盆地,其油气成藏主要与萨哈林—北海道大型走滑断裂和古阿穆尔河三角洲有关。在该盆地油气成藏特征、区域地震解释、精细沉积微相研究基础上,通过对多条横切构造走向的区域大剖面分析,系统探讨了大型走滑断裂与三角洲的共生关系以及二者对盆地油气成藏的影响。研究表明:萨哈林—北海道大型走滑断裂是在印度板块与欧亚板块碰撞的远程效应作用下形成的大型右旋走滑断裂系;同期发育的3期古阿穆尔河三角洲受右旋作用的影响,三角洲沿断裂带由南向北迁移,形成南北两大沉积中心,大型走滑断裂与三角洲联合影响和控制了盆地的油气成藏,盆地东南海域主要勘探领域为以天然气为主的达吉组,盆地东北部海域主要勘探领域为以石油为主的努托沃组、奥克贝凯组。     

Design, analysis, and evaluation of concurrent checking sortingnetworks

In this brief, we propose two new concurrent error-detection (CED) schemes for a class of sorting networks, e.g., odd-even transposition, bitonic, and perfect shuffle sorting networks. A probabilistic method is developed to analyze the fault coverage, and the hardware overhead is evaluated. We first propose a CED scheme by which all errors caused by single faults in a concurrent checking sorting network can be detected. This scheme is the first one available to use significantly less hardware overhead than duplication without compromising throughput. From this scheme, we develop another fault detection scheme which sharply reduces the hardware overhead (using an additional 10%~30% hardware) but still achieves virtually 1001 fault coverage     

Generation of Scattering Functions for Mobile Communication Channel: A Computer Simulation Approach

In this paper, an algorithm of generation of thescattering function by computer simulation for the WSSUSurban mobile communication channel is studied. Thescattering function, which contains much valuable information of the channel, is calculatedthrough three approaches. The empirical measuredparameter database and recommended standard methods areused to generate the scattering function as the firstand second approaches. An in-service measurement ofthe GSM network is performed in Singapore, in thefrequency range 935-960 MHz using the Rohde and SchwarzChannel Sounder. The data collected are used for the calculation, as the third approach. Thefour main characteristics of the channel, the Dopplerspread B_d, the multipath spreadT_m, the coherence time t, and thecoherence bandwidth f, are observed. The computer-calculated scattering function isshown to be an accurate and effective tool forsimulation of WSSUS channels. As a result, a softwarepackage is developed and utilized in the X-Windowenvironment for the simulation of the urban mobilecommunication channel. It can meet most of therequirements of both the system designers and theservice providers.     

Multi-State Chaos-Shift-Keying Modulation System: Analysis and Realization

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用油气运移痕迹的统计结果确定仓储层厚度--以东营凹陷为例

在对东营凹陷网毯式油气成藏体系结构进行研究的基础上，针对其中、东部的特殊地质情况，对仓储层进行了精细划分。以钻井油气显示和试油数据为依据，研究了仓储层中的油气运移规律，提出了仓储层厚度的界定方法，并指出厚度是影响仓储质量的关键因素，只有在构成仓储层的砂砾岩体达到一定厚度时才能成为有效仓储层。仓储层厚度越大的地方，越有利于油气的运移和聚集成藏。同时在仓储层中显示油气成藏和有油气运移痕迹所要求的砂砾岩体厚度是相近的，而与无油气运移痕迹的砂砾岩体厚度有明显的差别。并且随着埋藏深度的增加，要求作为仓储层的砂砾岩体厚度也随之增大。因此，可以通过计算仓储层厚度来评价仓储层的质量。该方法在实际应用中简便可行，对于评价类似地区的网毯式油气成藏体系仓储层的仓储质量有借鉴作用。