Facies-controlled volcanic reservoirs of northern Songliao Basin, NE China

Volcanic rocks of the late Mesozoic are very important reservoirs for the commercial natural gases including hydrocarbon, carbon dioxide and rare gases in the northern Songliao Basin. The reservoir volcanic rocks include rhyolite, andesite, trachyte, basalt and tuff. Facies of the volcanic rocks can be classified into 5 categories and 15 special types. Porosity and permeability of the volcanic reservoirs are facies-controlled. Commercial reservoirs were commonly found among the following volcanic subfacies: volcanic neck (I1) , underground-explosive breccia (I3), pyroclastic-bearing lava flow (II3), upper effusive (III3) and inner extrusive ones (IV1). The best volcanic reservoirs are generally evolved in the interbedded explosive and effusive volcanics. Rhyolites show in general better reservoir features than other types of rocks do.     

Parallels plane projection and its geometric features

A new equivalent map projection called the parallels plane projection is proposed in this paper. The transverse axis of the parallels plane projection is the expansion of the equator and its vertical axis equals half the length of the central meridian. On the parallels plane projection, meridians are projected as sine curves and parallels are a series of straight, parallel lines. No distortion of length occurs along the central meridian or on any parallels of this projection. Angular distortion and the proportion of length along meridians (except the central meridian) introduced by the projection transformation increase with increasing longitude and latitude. A potential application of the parallels plane projection is that it can provide an efficient projection transformation for global discrete grid systems.

     

半Lagrange法在数值预报中的应用和近年来的发展(Ⅰ)

本文就五十年代以来半Lagrange法在数值预报中的应用和近年来的发展进行评述,介绍我国在这方面的工作。还就此法和Euler法的优缺点作了比较;指出了存在的问题。     

LC元件参数的数字测量方法与设计

本文着重说明如何将LC元件的諸参数转换为相应的数字量,以适应数字測量的要求。本文采用的方法与设计,具有电路结构简单,易于实现的特点。     

The space distribution and orbital resonances of asteroids

We have made a detailed numerical analysis of the various orbital resonances of the asteroids and examined the variation in the distribution of trajectories near the equilibrium points in the phase plane, and hence arrived at a preliminary explanation of the features (gaps and clusters) in their distribution in space.     

Stress waves in laterally loaded piles

The behaviour of single vertical piles subjected to lateral loading at the pile head was analysed. Based on the assumption of beam on elastic foundation, the analysis was made by using the method of direct analysis which is a numerical approach making direct use of governing physical laws without explicitly utilizing the differential equation of vibration. The analysis provides short-time pile response to pulse loadings. These results indicate, among others, that an interaction between the dilatation and shear waves results in a stress discontinuity of considerable magnitude which may deserve special attention in pile design.     

Transfeer of organic pollutants during sewage-seawater mixing

The transfer processes of organic pollutants during sewage-seawater mixing were simulated in three different mixing systems. The release rate of organic matter from sewage particles to seawater was found to be about 0.02–0.04 d⁻¹. The release processes can be simulated by an exchange-equilibrium kinetic model. Degradation of COD was observed in all three mixing systems and can be described by a first order kinetic equation. The degradation rate constantk ranged between 0.04 and 0.07 d⁻¹. These results have provided important parameters for estimation of environmental capacity.     

大气模式设计中的两个问题

本文就大气模式设计中的两个问题:分辨率的确定和非绝热加热、耗散之间的虚假的不平衡的处理进行了讨论。还推导了决定水平和垂直分辨率的公式以及调整非绝热和耗散使其达到准平衡的办法。     

拟肾上腺素药物对不同鱼离体心脏活动的影响

本文仿照straub离体蛙心灌流法,用浓度为10~(-6)M至10~(-3)M的拟腎上腺素药物0.05-0.25m1注入1.5m1灌流液中,观察腎上腺素、去甲腎上腺素、异丙肾上腺素、间羟胺和甲氧胺对黄鳝、乌鳢、尼罗罗非鱼、胡子鲶和埃及胡子鲶离体心脏的影响作比较,并进行心肌受体分析。实验结果表明,拟腎上腺素药物对不同种类鱼离体心脏活动的影响不同,不同种类的鱼心肌腎上腺素受体也不同。这与鱼类种属不同有关。而拟腎上腺素药物对胡子鲶和埃及胡子鲶离体心脏的影响相同:異丙腎上腺素的兴奋作用为β-受体阻断剂所抑制;甲氧胺的抑制作用为α-受体阻断剂所阻断。表明其心肌存在着β-受体和α-受体,但以β-受体的作用较明显。提示这两种同属異种鱼的心脏调节机制相同。