油气田产量预测的一种功能模拟模型

论述了油气田开发系统的非线性特征，特别是描述系统变化的产量指标在整个开发过程中的非线性．认为油气田累积产量随时间呈不对称“Ｓ”型有限增长；并基于不对称有限增长信息的微分方程，提出了一种预测油气田产量的功能模拟模型及其相应的参数求解方法．同时，文章还对油气田产量兴衰的四个阶段，以及油气田瞬时产量和年产量的关系进行了研究．模型从系统辨识理论和控制论的观点出发，从时间流中考察油气田产量系统的非线性特征，具有多功能性．它不但可以预测油气田的累积产量、瞬时产量和年产量，而且可以预测油气田的可采储量，同时还可以预测最高瞬时产量、最高年产量及其发生时间与相应时刻的累积产量，还可预测年产量与瞬时产量兴衰过程的时间界线．经实例验证表明，模型具有很好的适用性和有效性．     

赵修复窄腹细蜂新属种记述(膜翅目:窄腹细蜂科)

庆贺赵修复教授八旬华诞和教学与科研六十年,特描记窄腹细蜂科(Roproniidae)的一个新属种命名为赵修复窄腹细蜂Hsiufuropronia chaoi Yang作为纪念,模式标本保存在北京农业大学昆虫标本馆。     

The electrical conductivity of H_2O at 0.21-4.18 GPa and 20 -350℃

The electrical conductivity of H2O in solid and liquid phases has been measured at 0.21-4.18 GPa and 20-350℃. The results indicate: ( i ) different phases of H2O in solid have different relations between electrical conductivity and temperature and pressure. The conductivity changes continuously with temperature, but discontinuously with the pressure between 2.11 and 2.58 GPa, which corresponds to the transforming pressure between ice (Ⅵ) and ice ( Ⅶ ) ; ( ii ) the con-ductivity of H2O in liquid all increases with temperature and pressure, but there are discontinuities at pressures between 0.57 and 0.9 GPa, and between 2.11 and 2.58 GPa, which are also consistent with the polymorph of ice (ice ( Ⅴ), ice (Ⅵ) and ice ( Ⅶ ) ) . This reflects that H2O in liquid at different pressures has quite different properties of electron chemistry. It is prob-ably the important reason that causes the layers with high electrical conductivity and low velocity in the earth's crust and upper mantle.     

MSEM增压系统一维非定常流计算模型的改进

对ＭＳＥＭ增压系统一维非定常流数值模拟中影响计算精度的四个主要因素：气阀端、变截面段、质量添加段及计算时间步长进行了分析，并提出了改进措施。计算结果表明，流量误差得到显著减小。