毛冠鹿p16^INK4基因第二外显子序列分析

采用PCR扩增技术首次克隆毛冠鹿p16^INK4基因第二外显子，DNA杂交和序列分析发现，在307个碱基的第二外显子中仅有5个碱基的差异，同源性达98．4％，p16^INK4基因的第二外显子是高度保守的区域，在其功能中起重要作用。     

Method for tumor recognition with short dynamic PET images: theory and simulation study

A new method was provided in this paper to recognize tumor in PET images automatically and reduce the waiting time of patient. Based on the unsupervised clustering algorithm (ISODATA), this method diagnoses tumor with short dynamic PET images. The theoretical basis of this method is that the metabolic characteristics of different tissues, represented by time activity curve in the region of interest, are distinctive. The computer program was developed and validated using simulated dynamic PET data with small tumor in lung. Simulation study shows that, this method could recognize tumor with the short dynamic PET data in 10 min successfully, and this method was not sensitive to initial cluster center.     

浅谈钢筋混凝土裂缝的成因及预防

随着我国建设事业的飞速发展,建筑物钢筋混凝土结构的普遍应用,裂缝出现的概率在增加,不仅会影响工程质量的整体外观形象,而且会降低抗渗和抗冻能力,并会导致钢筋锈蚀.影响结构物的正常使用功能,裂缝进一步扩大甚至可能会导致坍塌事故.因此,研究裂缝产生的原因及其影响因素,能更好地防治裂缝,提高工程质量.     

论欧盟反规避立法的最新发展

反规避是反倾销中出现的新问题。本文对欧盟反规避立法的最新发展作了分析，指出它虽然是依ＧＡＴＴ对“改锥案”的裁决修改而成的，但其贸易保护主义色彩仍很浓厚。这一发展变化，对我国的对外经贸及投资活动产生一定的影响。     

Photoluminescence from Ge-SiO2 thin films and its mechanism

Ge-SiO₂ thin films were deposited on p-type Si substrates using the radio frequency (rf) magnetron sputtering technique with a Ge-SiO₂ composite target. Films were annealed in N₂ ambience for 30 min at 300℃—1000℃ with an interval of 100℃. Through the X-ray diffraction, the average size of Ge nanocrystals (nc-Ge) was determined. They increased from 3.9 to 6.1 nm with increasing annealing temperature in the range of 600℃—1000℃. Under ultraviolet excitation, all samples emit a strong violet band centered at 396 nm. With the formation of nc-Ge, the samples exhibit another emission of orange band with the peak at 580 nm and its intensity increases with the increasing size of nc-Ge. The peak positions of two bands do not shift obviously. Experimental data indicate that the violet band comes from GeO defect and the orange band originates mainly from the luminescence centers at the interface between the nc-Ge and SiO₂ matrix.     

汉语双音节方位词语的产生

“之一、以一”类双音节方位后置词结构的产生时期较早，先秦时期已经有这种用法；“一面、一边、一头”和“之一、以一”类双音节方位名词的出现时期较晚，从魏晋南北朝以后逐渐产生。     

一种基于黑板模型的猜测推理方法

针对黑板结构中的猜测现象提出了一种基于数据依赖图的猜测推理方法，并给出了这种方法的模型及实例     

服务系统中申请项—状态集约束规则算法研究

本文研究服务系统中顾客的申请项能否被接受对顾客所处的状态的依赖关系的问题，分析了申请的拒绝规则的结构，给出了判断申请项能否被接受的算法，提出了一种当决策者需要拒绝规则经常变化时，操作员修改系统中的拒绝规则的解决方案。     

催化动力学测定微量锰（Ⅱ）的研究

研究了锰(Ⅱ)催化抗坏血酸还原钼酸铵而形成铟蓝的指示反应及其动力学条件,建立了测定微量锰(Ⅱ)的新方法.方法灵敏度为2.7×10~(-10)g/ml锰(Ⅱ),检测范围0—11μg/25ml.用于测定中药内的微量锰(Ⅱ),获得了满意的结果.     

由于下沉引起的民用建筑价值降低的估算计方法

本文讨论了矿山开采的赔偿问题，根据民用建筑的结构形式及使用特点，提出了按照建筑物价值降低的幅度来确定赔偿标准的观点。文中给出了建筑物价值的评估方法，以及破坏等级与建筑物价值降低的关系，并根据使用特点提出了修正系数