生育观转变的定量研究

提出了一种定量地表征社区生育观转变程度的方法。该方法以社会生育观为目标，通过分别对影响生育观的四个因素：生育目的，生育的数量需求，生育的性别偏好以及生育的时间选择的定量化表示，将家庭生育观综合成为一个指数，该指数表征家庭生育观对社会生育观的目标实现度，换言之，该指数也表明家庭生育观向社会生育观转变的程度。这种方法可用于比较不同时点，同一社区内生育转变的方向和程度，也可用于比较不同社区内生育转变的标     

A comparison of models for forecasting the discovery of hydrocarbon deposits

There are many geologic resource assessment techniques available that can be used to estimate the hydrocarbon potential of frontier basins. The techniques do not, however, produce discovery rate forecasts, which are critical to government and industry planners. Various methods of predicting the discovery rate in frontier basins are reviewed and appraised within the context of the drilling history of Canada's Scotian Shelf. The reviewed models include a mean historical discovery rate technique, the exponential decline model, a logistic curve technique and a class of models based on a sampling without replacement approach to prediction. Models are found to perform best over the longer forecast horizons, with those models based on the sampling without replacement technique tending to perform best.     

汽车空调冷凝器的匹配设计研究

结合汽车空调压缩机的变工况性能 ,即汽车空调压缩机性能指标随转速和冷凝温度而变化的情况 ,根据汽车空调系统的冷凝器在不同设计工况下的设计结果 ,经过分析冷凝温度、冷却介质温差参数变化对冷凝器设计结果的影响 ,综合得出对满足汽车空调系统不同运行工况的冷凝器设计参数如冷凝温度、冷却介质温差等的合理选择 ,从而实现汽车空调冷凝器与压缩机及系统匹配的效果     

回归函数及其导数非参数估计的强一致收敛速度

本文研究了回归函数及其导数的非参数估计.对随机与固定设计的回归函数,分别利用核估计和非参数加权估计,在核函数及权函数满足一条件下,本文证明了估计一致强收敛于待估函数的速度可达到最优.从而进一步推广和发展了Hardle(1988)、Severini,etal.(1992)的许多结果.     

关于特征函数、隶属函数、关联函数间的相互关系

本文说明了特征函数、隶属函数、关联函数的基础经典集合、模糊集合、可拓集合产生的实际背景和三个集合各自的特点,指出可拓集合非空。阐明了三种函数概念之间的区别与联系,特别指出关联函数的建立使应用物元理论更符合实际的描述。     

Household projection methods

"The role of household projections as a basis for forecasts of households at [the] national and sub-national level is discussed and a number of criteria for such projections are outlined. The projection method used by the Department of the Environment [in the United Kingdom] is examined in the context of these criteria and it is concluded that it is both practical and robust. However, it is open to criticism, first because of its failure to make the best use of the available data and of theoretical knowledge, and secondly because of its 'black box' nature. An alternative two-stage strategy is developed. The first stage involves constructing projections using a new curve-fitting method which takes account of within cohort life-cycle headship rate changes. The second is a method of analysing the resulting projections by modelling transition rates between different household states. Worked examples of both methods are presented."     

刀具磨损和耐用度变化趋势的研究——对刀具切削性能的全面评价方法

在理论分析和实验的基础上,本文提出了以刀具磨损量的分散性随切削时间的变化趋势,即磨损量的时间稳定性作为刀具切削性能的另一个重要指标的观点。据此,并由两组短时间切削试验的结果,本文给出了两个不同的算例,估计了刀具磨损量或耐用度的条件均值和条件方差,全面比较了两种刀片的切削性能,并对“初期磨损阶段”的含义作了讨论与修正。     

多次线性判别方法

本文提出一种“内聚外散”的投影思想,并以回代正确率为标准,对ｋ个总体的样本数据 逐次建立ｋ－１个线性判别方程,形成多次线性判别方法．并利用此方法对许多例子进行检验,其 回代正确率均高于一般的判别方法．本文还讨论了逐步挑选因子方法,此法具有更明显的优点．     

河北省下花园地区下马岭组碳酸盐生油岩热模拟实验

对下马岭组灰岩进行了热模拟实验,对碳酸盐岩腐泥型有机质的热演化规律进行了研究,划分了其演化阶段,给出了成熟度指标和各阶段油气产率.研究表明,矿物对有机质热演化的影响,在成熟阶段主要表现为催化作用;在高过成熟阶段则主要表现为对干酪根裂解、脱氧和缩合有阻碍作用.沥青“C”的某些成熟度指标可较好地反映有机质成熟度;在缺乏镜质体时焦沥青反射率可作为有效的成熟度指标.此外还对比了岩样和干酪根的模拟结果,以及沥青“A”和“C”的差异.     

具有零曲率边界Billiard系统的混合率

对具有慢混合率的奇异动力系统的研究方法是近年才发展起来的，但应用到具体模型上还很困难．研究了一类新型的具有0曲率边界的半发散billiards系统．证明了这个系统碰撞映射的相关函数的收敛速率的上界是（lnn）^8/3／n^5/3,其中n表示离散的时间．