Diagnosis of prostate cancer by quantitative analysis of 3DMRSI data: A new model

Three-dimensional magnetic resonance spectroscopic imaging (3DMRSI) is helpful to identify prostate cancer (PC)from benign prostate hyperplasia (BPH) and to show the distribution of tumor infiltration. Combined with the (Cho + Cre)/Cit ratio, the z-score model can effectively discriminate prostate cancer from stromal benign prostate hyperplasia (sBPH) and detect small malignant lesions (SML).     

Stereo- and regio-selectivity in the photosensitized dimerization of 1, 3-dimethylthymine in solution

The effects of reaction pathway and temperature on stereo- and regio-selectivity of photocycloaddition of 1, 3-dimethylthymine (DMT) which gives four cyclobutane type dimers in solution using acetone as the photosensitizer, are investigated by measuring the product distribution. It is demonstrated that the ground-state aggregation between DMT molecules mainly leads to (h-t)dimers, and the diffusion-controlled triplet dimerization is favorable to the formation of (h-h) dimers.     

A template of rat brain based on fMRI T*2 imaging

The development of functional magnetic resonance imaging (fMRI) technology has made it possible to carry out functional brain imaging experiments in small animals. Usually, group data is required to form the assessment of population, which can not only increase the sensitivity of the overall experiment, but also allow the generalization of the conclusion to the whole population. In order to average the signals of functional brain images from different subjects, it is necessary to put all the mapping images into the same standard space (template image). However, up to now, most animal brain templates remain unavailable and it must be done by ourselves. In this study, a template image based on the brains of eight male Wistar rats is obtained, and it is successfully used in our present Alzheimer disease (AD)-like rat model studies as template for spatially normalizing images to the same stereotaxical space. The fMRI results processed with statistical parametric mapping (SPM99) software are in agreement with the results from immunohistochemical experiment, which proves that this method is universally applicable to the pathologic models of other small animals and to human brain lesion studies.     

聚（ε-己内酯）／纳米CaCO3复合材料结构与性能的研究

用熔融共混法制备了聚己内酯(PCL)／纳米CaCO3复合材料，考察了纳米CaCO3对PCL结晶性能和CaCO3含量对PCL／CaCO3复合材料力学及形状记忆性能的影响。DSC结果显示纳米CaCO3对PCL的成核结晶有一定的促进作用，辐照交联使PCL的结晶熔融温度和开始结晶温度提高5℃以上；DMA结果显示复合材料的模量随纳米CaCO3含量增加而增大，但高于40％后基本无变化。纳米CaCO3含量在5％～15％范围内能明显提高PCL的拉伸强度、弯曲强度和杨氏模量；辐照交联也起到增强各组分复合材料力学性能的作用，其变化的规律与交联前一致。复合材料经辐照交联后具有形状记忆特性，随着纳米CaCO3含量的增加，形变后的材料在熔融温度下开始回复所需时间缩短，回复速率加快，所有组成的样品在所测试的实验条件下最终回复率达97％以上。扫描电子显微镜观察表明纳米CaCO3粒子在PCL基质中无明显团聚现象。     

王侯将相宁有种乎--一个平凡人借助立新世纪F3系统的成功之路

“我叫伍泽健，现在是立新世纪大中华区的皇家总裁。”麦克风传递着一个清晰有力的声音，“我要讲述的仅仅是一个普通人经历直销的最大收获与改变。而在立新世纪里，你也可以沿着F3系统的轨迹步入成功。请大家牢记，任何成功人士在成功之前，都和你我一样普通。”     

论藏缅语的反响型名量词

反响型量词是研究量词的关键。其特点可以归纳为以下三点：一是具有能产性；二是语法功能超过语义功能；三是具有中介性。反响型量词在发展中从“语音语法”模式走向“语义语法”模式。     

甘兰型油菜直播高产栽培数学模型研究

研究了中双1号的种植密度、氮、磷、钾肥及氮肥施用期五个主要栽培因子与产量之间的关系及其数学模型。试验获得3125套农艺措施组合方案，优选出每667m^2产油菜籽220-280kg间三个产量档次的农艺措施为：每667m^2种植2．2-2．6万株、施尿素35—47k、普钙25—47k、硫酸钾10—12k，尿素施用期是底肥70％、苗肥30％。     

简谐激励弹簧测力机构的3次超谐共振

应用拉格朗日方程,得到了有阻尼弹簧测力机构在简谐激励作用下具有周期系数的非线性运动微分方程-- Duffing-Mathieu方程;根据非线性振动的多尺度解法,得到了系统满足3次超谐共振情况的一次近似解以及对应的定常解,并对其进行了数值计算,分析了激振力、谐调值、系统阻尼、弹簧刚度等对系统的影响,揭示了一些新的动力学现象.     

基于J2EE数据库访问性能的优化方法

阐述了基于J2EE的应用系统中,改善数据库访问性能,提高执行效率的几种方法,为合理有效的开发软件系统提供设计标准和开发手段.