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根据储层物性参数以及其它影响因素,应用模栩数学建立了孔眯性玻酸盐岩储集层分类数学模型,并进行了纬合评刹分类.此法克服了长期以来储集层分类的片面性和机械性,使分类更加科学。     

地震相模式识别

地震层序内包含着不同的地震相带。地震剖面上对应于不同沉积相带可能呈现出不同的地震相特征,即不同的地震相模式。由地震剖面提取地震层序的地震相特征参量,并通过统计模式识别的方法划分出不同的地震相带,根据地震相带所具有的反射特征并结合钻井资料和其它地质资料可进行沉积相推断解释。对三角洲、冲积扇和湖盆三类陆相沉积地质模型的合成地震记录理论样本进行了分类试验,正确识别率达85％;对实际地震剖面也进行了试验,证明有用于实际资料的前景。     

白带，女性健康的晴雨表

女人，没有不希望自己所爱的人忠诚、专一的，所以在任何情况下都不能允许他好“色”，但女人对自己衣着的色彩却总是挑剔了又挑剔。     

我国首次发现的玉米尖翅蛾

玉米尖翅蛾是国内尚未见报道的一种蛾类仓库害虫。本文较为详尽地叙述了此虫成、幼虫的形态特征及初步观察的生活习性。     

多层半无限弹性体在任意荷载作用下的解析解

本文从柱坐标系下弹性力学基本方程出发，经关于方位角的Ｆｏｕｒｉｅｒ变换及关于径向的Ｈａｎｋｅｌ变换，建立了介质层的传递矩阵，利用层间完全接触条件，给出了多层半无限弹性体在任意荷载作用下的理论解。由于不必要引入应力函数，所以，本方法概念清晰、易懂、便于实际应用。     

A note on generalized hold functions

In this note, we study the generalized hold functions for use of digital control of continuous-time systems. First we define and solve the problem of simultaneous stabilization and minimization. It is shown that every plant with a strictly proper transfer function is simultaneously stabilizable and minimizable, provided that the sampling interval is small enough. We also consider robust designs of generalized hold functions. A condition is given for the stability of a system using generalized hold functions in the presence of uncertainty.     

Modified Atmosphere Maintains Quality of Fresh-cut Cantaloupe (Cucumis melo L.)

ABSTRACT: Fresh-cut cantaloupe cubes were placed in film-sealed containers in which the internal gas mixture was attained naturally (nMAP), was flushed with 4 kPa O₂ plus 10 kPa CO₂ (fMAP), or was maintained near atmospheric levels by perforating the film (PFP). While both nMAP and fMAP maintained the salable quality of melon cubes for 9 d at 5°C, fMAP maintained quality better than nMAP. The benefit of fMAP was indicated by better color retention, and by reduced translucency, respiration rate, and microbial population compared with nMAP. Shelf life of cubes in PFP was only 5 to 7 d at 5°C, and its rapid decline was due to tissue translucency and/or off-odor development.     

柴油机动力总成异常振动试验分析

对某SUV车柴油机动力总成产生的异常振动进行了试验分析研究.在介绍柴油机动力总成振动基本分析方法的基础上,开展了整车道路及转鼓试验,进行了整车及台架条件下动力总成的振动模态试验.通过对动力总成的振动特性分析,找到了引起动力总成操纵手柄异常振动的原因:飞轮壳刚度偏低,动力总成系统固有频率落入柴油机工作转速的激励频率区间,...