非同分布φ混合序列加权和的强极限收敛性

利用φ混合序列矩不等式和截尾的处理方法,研究非同分布φ混合序列加权和强极限收敛性质的问题,得到了若干新结果,推广并改进了独立同分布情形下的相应结果.     

基于热中子探测评价裂缝的示踪剂特性研究

针对裂缝热中子示踪探测方法,从中子双组扩散理论入手结合蒙特卡洛数值模拟方法,分析压裂前后地层热中子分布影响因素,并模拟不同类型示踪剂及含量的热中子裂缝响应规律,筛选最佳示踪剂并给出其在支撑剂中含量的上、下限。结果表明:压裂前后热中子计数变化量主要受裂缝宽度和标记支撑剂中示踪剂含量的影响;钆对裂缝宽度变化反应最灵敏,钆元素是作为标记支撑剂的最佳示踪元素;随支撑剂中Gd 2O 3含量的增加,热中子计数率降低,热中子计数变化量D增加;示踪剂中氧化钆的上、下限值随裂缝宽度呈指数降低,且当裂缝宽度为1.0 cm时,Gd 2O 3的质量分数上限为0.68%,下限为0.03%。     

高速电主轴热特性仿真与实验研究

对高速电主轴温度场分布随转速的变化规律进行了研究。通过在外壳上布置一定数量的温度传感器,对不同转速下的外壳温度进行实时测量,并将实验结果与ANSYS的模拟结果进行对比,验证了采用在电主轴外壳上布置多个测点测量与仿真相结合的方法来预测电主轴内部温度场分布的可行性;另外还分析了在不同转速下,高速电主轴关键部位的温升,仿真结果表明:主轴在6000~10000 r/min时,温升呈线性增加,在大于10000 r/min后,温升以指数规律增加。     

Predicting Initial Formation Temperature for Deep Well Engineering with a New Method

With the progress of science and technology, human beings explore the energy under-ground with thousands of meters. As a thermophysical parameter, initial formation temperature (IFT) plays an essential...     

望江矶雨花台砾石层工程地质特性及形成机理

根据野外考察与实验资料，对南京雨花区望江矶的雨花台砾石层的工程地质性质作出初步评价认为该砾石层具有一定的固结性，较好的水稳性，较强的抗剪性，中低压缩性不同于现代松散的砂砾石堆积体，作者还运用沉积原理及风化理论对影响其工程地质性质的作用因素进行了探讨。     

Lorenz混沌系统的输入—输出性质分析

研究了Lorenz混沌系统的一类输入—输出性质，采用Lyapunov直接方法和数值仿真等研究方法，对Lorenz混沌系统的解的范数分别与输入信号的振幅、角频率之间的关系进行了分析，得出了诸多有意义而在线性系统中没有的结论，这对进一步研究Lorenz系统有重要的参考意义。     

沥青路面玻璃纤维加劲格栅的理化性能研究

通过沥青路面玻璃纤维加劲格栅的理化性能试验 ,给出了格栅的耐热性、耐腐蚀性、材料属性、抗张强度、弹性模量、温度对强度的影响等试验结果 ,为产品的应用提供了科学依据。     

Developmental modes of the Neoproterozoic-Lower Paleozoic marine hydrocarbon source rocks in China

Based on the researches on rock type, the mode of occurrence, diagnostic minerals and creatures, the sedimentary geochemistry and organic facies of Chinese marine source rocks from wells and outcrops, and on the research findings of developmental modes of foreign marine source rock, the authors consider that it is impossible to objectively make clear the formation mechanism of hydrocarbon source rock with high organic matter abundance by either single mode of preservation or high organic matter productivity. According to the Chinese geological features, the formation mechanism of the Neoproterozoic-Lower Paleozoic marine source rock is generalized into four modes, namely, thermal water activity-upwelling flow-anoxic; carbonate gentle slope-upwelling flow; xerothermic climate-brine euxinic milieu; and humid climate-retained euxinic milieu; as the Lower Cambrian undercompensation basin organic facies （the Tarim Basin, South China and southwestern margin of North China）, carbonate gentle lime mud bound organic facies （the Upper Ordovician in Tazhong region of the Tarim Basin and the Lower Silurian in the Upper Yangtze Platform）, the Middle Cambrian evaporation laggon organic facies （the Tarim Basin and the Upper Yangtze Platform）, enclosed undercompensation terrigenous bay organic facies （the Middle-Upper Ordovician in the west of the Tarim Basin, the Lower Silurian Long- maxi Formation in the Upper Yangtze platform）. Chinese marine sedimentations with lower organic matter abundance are generalized into two modes of consumption-dilution mode of open epicontinental sea and depletion-dilution mode of supercompensation basin.     

浅析供热计量收费计算原理与方法

介绍了热量计量的基本原理和热费确定的基本原则,阐述了供热总费用的构成与计算原理以及用户热费的构成与计算原理。