基于方位弯折的高分辨距离像雷达目标识别

针对高分辨雷达距离像的方位敏感性问题,将应用于语音处理的动态时间弯折技术引入高分辨距离像雷达目标识别领域,提出了一种动态方位弯折技术,该技术通过将测试数据与模板特征序列进行非线性伸缩(弯折),获得测试帧与模板之间最小匹配距离对应的最佳匹配路径,实现对测试数据的目标识别。对ISAR实测飞机数据的分类实验及与模板匹配法和RBF识别方法的比较,获得了良好的识别结果,表明了该方法的可行性和有效性。     

组网雷达系统对于高加速机动目标的精确跟踪研究

针对多基地雷达系统跟踪近距离高加速机动目标的场合,提出了一种并行扩展卡尔曼滤波算法。该算法首先建立起组网雷达群跟踪目标运动形态的观测模型,然后将三维加速度矢量引入到目标的运动模型中,通过并行计算的方式,在对加速度进行合理估计的基础上对量测数据进行卡尔曼滤波跟踪分析,获得目标的精确轨迹。仿真结果表明,该算法不仅能快速精确计算目标的位置和速度,而且具有很好的瞬态特性和稳态特性。     

试论高新技术与循环经济的结合机制

本文首先分析了高新技术和循环经济的主要特点。接着分析了高新技术与循环经济的结合机制，并指出了高新技术开发及其产业化对发展循环经济的先导作用，最后探讨了我国发展循环经济应采取的对策。     

油团聚加煤系黄铁矿抑制剂脱除煤中黄铁矿硫的研究

油团聚是以脱除煤中灰分为主的团聚技术,脱硫的效率很低,采用山西介休的高硫煤,探索在油团聚过程中加入不同的黄铁矿抑制剂(巯基乙酸、重铬酸钾、高锰酸钾)对脱除煤中黄铁矿硫的影响.结果表明加入黄铁矿抑制剂对脱硫效率有一定程度的影响.     

Autoregressive gamma processes

We introduce a class of autoregressive gamma processes with conditional distributions from the family of noncentred gamma (up to a scale factor). The paper provides the stationarity and ergodicity conditions for ARG processes of any autoregressive order p, including long memory, and closed‐form expressions of conditional moments. The nonlinear state space representation of an ARG process is used to derive the filtering, smoothing and forecasting algorithms. The paper also presents estimation and inference methods, illustrated by an application to interquote durations data on an infrequently traded stock listed on the Toronto Stock Exchange (TSX). Copyright © 2006 John Wiley & Sons, Ltd.     

Experimental study to confirm the existence of hydrocarbon under high pressure and temperature of deep lithosphere

Previous studies indicated that the existence of over- pressure in sedimentary basins not only affects the as- sessment of oil and gas resources, but also closely re- lates to the accumulation and preservation of petroleumin deep reservoirs[1,2]. It is well known that there are more than 180 overpressure basins in the world. Be- cause fluid pressure is transient in sedimentary basin over geologic time, the effect of increasing pressure on organic matter metamorphism is difficult to determine, …     

高孔低胶结砂岩储层饱和度和压力变化的时移地震AVO响应

研究了X油田高孔低胶结砂岩储层在含油饱和度和压力变化时纵、横波速度计算方法,并将计算数据与实际测井资料进行了对比。岩石物理参数计算和时移地震振幅随偏移距变化(AVO)正演模拟表明,X油田油藏含油饱和度变化时,地震纵波速度变化十分明显,而横波速度变化较小;储层顶反射P-P波AVO曲线变化明显,而P-S转换波AVO曲线变化很小。油藏有效压力变化对地震纵、横波速度有近似程度的影响,储层顶反射P-P波AVO曲线在入射角较小(θ<20°)时变化明显,而P-S转换波AVO曲线在入射角中等(30°<θ<50°)时变化明显。模拟结果对分析X油田时移地震可行性,确定油藏变化范围,区分油藏含油饱和度和压力变化,乃至真正实现时移地震定量解释都具有重要意义。     

分块矩阵特征值的圆盘估计

在考虑非正规性因素影响下，对分块矩阵给出了复方阵特征值的整体圆盘估计，即给出复方阵的特征值相对于对角元素算术平均值的偏离程度的估计。     

旋风分离器高温性能试验研究

为了预测温度对分离器性能的影响，选用一个直径为300mm的切流反转式旋风分离器在常温～973K的范围内进行了性能试验研究。试验用粉料为二氧化硅，其中位粒径为10μm；入口气速的变化为12～36m／s。试验测定了不同入口气速和温度下旋风分离器的分离效率与压降。结果表明，相同人口气速下，分离效率与压降均随温度的升高而降低。当气速达到最佳入口气速时，旋风分离器的分离效率最高，且最佳入口气速随温度的增加而增加。     

Abnormal high pressure in Kuqa foreland thrust belt of Tarim basin: Origin and impacts on hydrocarbon accumulation

Following analyses of the abnormal high pressure distribution characteristics, based on the geological characteristics, tectonic stress field and physical simulation, we investigated the formation mechanisms of abnormal high pressure and its impacts on hydrocarbon accumulation in the Kuqa foreland thrust belt. The abnormal high pressure appears at the bottom of the Paleogene and obviously exists in the Triassic and Jurassic. However, the pressure coefficient in the Triassic and Jurassic is lower than that in the Cretaceous and at the bottom of the Paleogene. Horizontally, the abnormal high pressure distribution is characterized by E-W orientation zoning. The maximum pressure coefficient lies in the Kelasu-Dongqiu-Dina tectonic zones in the center of the Kuqa foreland thrust belt and decreases away from the tectonic zones. The formation of abnormal high pressure was mainly related with the intense tectonic compression in the Early Pleistocene time, and tectonic uplifting, undercompaction and hydrocarbon generation were secondary factors contributing to abnormal high pressure. Under the rapid and intense tectonic compression in the Early Pleistocene, the rock framework firstly undertook 1/4 of the compression stress and the other was borne by the pore fluids. Due to the presence of great seal of gypsum-salt or gypsum-mudstone beds in the Paleogene, the pressure of pore fluids increased rapidly and led to the abnormal high pressure in the Kuqa foreland thrust belt. The abnormal high pressure has important impacts on hydrocarbon accumulation. It is one of the necessary conditions for formation of large oil and gas fields in the Kuqa foreland thrust belt.