雷达电站的模块化设计

从模块化的基本概念出发，结合雷达电站分系统设计的情况，探讨了雷达电站模块化设计的可行性和设计方法。     

调速系统碟阀放大器静特性分析

本文分析了上海汽轮机厂生产的全液压调速系统中蝶阀式油放大机构出现一、二次油压成正比的异常情况,并给出了放大器的特性曲线及影响的各种因素。最后提出了解决问题的措施,可供设计、制造及使用部门参考。     

信号平面变换中伪特征曲线的产生原理及解决途径

文中就平面变换技术多义性的原理进行了分析，论证了何种情况下会产生伪特征曲线。提出了识别伪特征曲线的方法和分选伪特征曲线的方案，多义性的分析使平面变换技术更完善和使用。     

PERFORMANCE ANALYSIS OF THE MUSIC ALGORITHM IN THE PRESENCE OF AMPLITUDE AND PHASE ERROR

This paper presents the performance analysis of the MUSIC algorithm in the presence of channel amplitude and phase Error. Theoretical expression for the error of DOA estimating with MUSIC algorithm and Cramer-Rao bound are derived. It is compared with simulations performed for some representative cases. The results of theoretical expression and simulation show that existence of these errors will increase the error of DOA estimating and degrade its performance.     

浇铸型不饱和聚酯树脂的研究

本文合成了具有良好性能的浇铸型不饱和聚酯树脂，对其性能作了进一步研究，结果表明在树脂分子结构一定的条件下，树脂的固化收缩率受单体使用量及填料使用量的影响较大，而固化速度及固化放热主要受固化体系的控制。     

绿色照明控制技术综述

本文阐述了绿色照明控制技术的现状和发展趋势。     

Precise FPN compensation circuit for CMOS APS [imager]

Fixed pattern noise (FPN) is one of the major disadvantages of CMOS imagers in comparison with CCD imagers. A simple and precise FPN compensation circuit for a CMOS active pixel sensor (APS) imager with an in-line non-destructive readout function is presented     

海南自贸港应急救援体系创新发展探讨

摘 要：海南自贸港面临自然灾害、城市化发展、产业升级带来的多重灾害事故风险挑战,因而始终把风险防范作为底线工程。为了更好地统筹发展与安全,海南十分注重应急救援能力建设。本文立足海南自贸港面临的灾害事故新风险和应急救援工作新挑战,借鉴国内外应急救援体系创新做法,提出了海南自贸港的应急救援体系新格局,为中国特色综合应急救援体系建设提供思路和借鉴。     

Genetic types and source of the Upper Paleozoic crude oil in the Shiguhao area in northern Ordos Basin,central China

The physical properties, group compositions, carbon isotopes and biomarkers of the Upper Paleozoic crude oil in the Shiguhao area in northern Ordos Basin were investigated to study geochemical characteristics and source of the crude oil. The Upper Paleozoic crude oil in the Shiguhao area belongs to the medium oil with high viscosity, high wax content, low sulfur content and low freezing point, and it displays the group composition of high saturated hydrocarbons/aromatics. The carbon isotopic compositions and biomarkers of crude oil indicated that the Upper Paleozoic crude oil was coal-derived oil and at the mature stage. The physical properties, carbon isotopes and GC-MS parameters of saturated hydrocarbons indicated that, the crude oil displayed a good affinity with the Upper Paleozoic coal rocks in the Shanxi Formation. Therefore, the Upper Paleozoic coal rocks in the Shanxi Formation were the important source of the Upper Paleozoic crude oil, and this provided valuable direction for the petroleum exploration in northern Ordos Basin.     

竹景观空间及其意境营造研究——以杭州西湖风景区为例

竹在中国文化中具有独特的意象特征。作为一种常用的园林植物,竹因其特殊气质和优美姿形,具有良好的景观价值。但目前尚缺乏将竹作为一种营造空间的植物展开专门的研究,故该文对竹类景观进行研究具有重要的现实意义。杭州西湖风景区竹景观造景效果突出、成景特色明显。笔者以之为例,对其竹景观现状进行分析,根据竹类植物的围合、夹道、点缀、背景衬托等作用将竹类景观空间分为竹林空间、竹径空间、配景空间、背景空间等多种类型,总结西湖风景区中以竹造景所成空间可营造的磅礴气势、清静幽趣、怡人雅趣与盎然野趣等意境形式,以期对竹景观物质表象与精神内涵的全面表达提供借鉴,为西湖风景区的历史文脉传承与文化景观建设做出贡献。