Origin of immature sulfur-rich oil in Jianghan oil field

Chemical structure of immature sulfur-rich kerogen and composition of immature sulfur-rich crude oil in Jianghun oil field have been studied. In molecular level, crude oil differs from thermolysed and chemolysed products of kerogen but does resemble the bitumen in immature sulfur-rich source rock. Therefore, immature sulfur-rich oil may be derived from the expelling of bitumen rather than from thermal cracking of kerogen.     

The v-v energy transfer of highly vibrationally excited states (I)

The relaxation of the highly vibrationally excited CO (v = 1–8) by CO₂ is studied by timeresolved Fourier transform infrared emission spectroscopy (TR FTIR). 193 nm laser photolysis of the mixture of CHBr₃ with O₂ generates the highly vibrationally excited CO(v) molecules. TR FTIR records the intense infrared emission of CO(v→v-1). The vibrational populations of each level of CO(v) have been determined by the method of spectral simulation. Based on the evolution of the time resolved populations and the differential method, 8 energy transfer rate constants of CO(v = 1–8) to CO₂ molecules areobtained: (5.7±0.1), (5.9±0.1), (5.2±0.2), (3.4±0.2), (2.4±0.3), (2.2±0.4), (2.0±0.4) and (1.8±0.6) (10¹⁴ cm³ · molecule⁻¹ · s⁻¹), respectively. A two-channel energy transfer model can explain the feature of the quenching of CO(v) by CO². For the lower vibrational states of CO, the vibrational energy transfers preferentially to the u³ mode of CO² For the higher levels, the major quenching channel changes to the vibrational energy exchange between CO(v→v-1) and the u¹ mode of CO².     

On some tests-based projection pursuit for elliptical symmetry of a high-dimensional distribution

Some test statistics of Kolmogorov type and Cramér-von Mises type based on projection pursuit technique are proposed for the testing problem of sphericity of a high-dimensional distribution. The limiting distributions of the test statistics are derived under the null hypothesis and under any fixed alternative. The asymptotic properties of bootstrap approximation are investigated. Furthermore, for computational reasons, an approximation for the statistics, based on the number theoretic method, is suggested. An erratum to this article is available at .     

Neuropeptide Y receptors in a protozoaStylonychia mytilus

Radio ligand binding assays(RLBA) were used to study neuropeptide Y (NPY) receptors in a protozoa Stylonychia mytilus. The experimental results showed that 2-3×10+3/mL Stylonychia cells incubated in Pringsheim solution which contained 3H-NPY could specifically bind 3H-NPY and concomitantly present saturable characteristic. This suggested that Stylonychia possessed some specific binding sites for NPY. Scatchard transformations of binding assay for the NPY receptors at 25℃ are compatible with the specific activity of 42.47 fmol/10+3 cells and the binding equilibrium constant of 0.113 nmol/L. The data of 125I-NPY binding assay to the membrane protein extract of Stylonychia indicated that there was a significant difference between the amount of total bound and nonspecific bound of 125I-NPY. This result indicated that NPY receptors were probably localized mainly on the cell membrane.     

补偿扰动的PWM逆变器无差拍控制

提出了两种ＰＷＭ逆变器的改进无差拍控制算法．这两种算法根据ＰＷＭ逆变器的状态方程,分别采用直接补偿扰动和最优预见控制技术,利用未来信息决定当前的控制输入．使用ＭＡＴＬＡＢ软件对这两种算法进行了仿真．结果表明,当存在随机扰动及电路参数变化时,所提出的两种算法的控制效果均比不考虑补偿扰动的无差拍算法有较大改善．因此,该两种控制算法能够有效地抑制电路参数变化引起的或来自外部的扰动,使输出电压能很好地跟踪参考电压,控制响应快,鲁棒性好．     

不同贮藏条件下鳗骨油氧化特性的研究

研究了室温下（15℃）鳗骨油在空气中的自氧化速度,以及温度和贮藏条件对鳗骨油氧化速度的影响。实验所设的温度梯度分别为6℃、15℃、35℃,贮藏条件分别是敞口,密封（蜡封）和用N2驱除氧气后密封保存。实验结果显示,室温下鳗骨油在空气中的自氧化速度,敞口存放4天,过氧化值就已超过0.15;温度和贮藏条件对鳗骨油的氧化速度有显著影响,驱除氧气低温贮藏可以有效地防止鳗骨油的氧化。     

用于瞳孔序列图像分析的实时轮廓检测和参数提取

本文介绍一种医用图像分析系统．该系统连续获取瞳孔图像,根据对图像序列的某些先验知识自动确定门限．在此基础上进行快速边缘检测,并自动修补缺损的目标轮廓．在判定所得轮廓有效后计算目标面积．若数据无效则自动重新采样．序列图像观测结束后对间隔不均匀的数据进行内插校正．系统所提供的分析结果可用于临床和医学研究     

应用模糊优先理论确立核心期刊

为利用图书馆与情报部门对图书资料的管理。提出了运用模糊优先比定律、结合各单位实际情况来确立图书馆与情报部门核心期刊的方法,并依照图书馆的科技期刊使用情况,对《中文核心期刊要要总览》中的部分自动化类、机械类的核心期刊进行了模糊优先排序,较好较好效果。     

互换性与测量技术基础试题库及软件开发

本着操作简单、方便、实用、功能强的原则,开发了《互换性与测量技术基础题库系统》软件,用此软件,使略有Ｗｉｎｄｏｗｓ操作基础的教师,在不到一的时间内就可以自动生成一份试卷。     

学生学习行为与学生生源相依性的统计分析

从广义试验的角度将数理统计方法引入到对当代大学生思想及行为问题的分析研究之中,并对学生学习行为与学生来源的相依性进行了探作