关于白盒测试基本方法的分析

对软件白盒测试的基本方法进行分析,计算机程序有顺序、选择、循环3种基本结构。根据3种基本结构的组合方式,程序又可以分为基本结构、嵌套结构和连锁结构。对于嵌套结构程序,可以使用基本路径测试法进行测试,对于连锁选择结构,可以抽取部分路径进行测试;对于连锁循环结构,则需根据循环是否独立来确定具体测试方法。     

Classification of Medical Brain Images

Since brain tumors endanger people‘s living quality and even their lives, the accuracy of classification becomes more important. Conventional classifying techniques are used to deal with thosedatasets with characters and numbers. It is difficult, however, to apply them to datasets that include brain images and medical history (alphanumeric data), especially to guarantee the accuracy.For these datasets, this paper combines the knowledge of medical field and improves the traditional decision tree. The new classification algorithm with the direction of the medical knowledge not only adds the interaction with the doctors, but also enhances the quality of classification. The algorithm has been used on real brain CT images and a precious rule has been gained from the experiments. This oaoer shows that the ahzorithm works well for real CT data.     

HPLC法测定2-对氯苯基-4-苯基-1,5-苯并硫氮杂-α-(丁二酰亚胺基)-β-内酰胺

建立了测定2-对氯苯基-4-苯基-1,5-苯并硫氮杂(艹卓)-α-(丁二酰亚胺基)-β-内酰胺的高效液相色谱(HPLC)分析法.结果表明该法重现性好,灵敏度高,快速,准确,平均回收率为96.9％～103％.     

昆虫气味结合蛋白研究进展

随着昆虫触觉气味结合蛋白的发现,目前,昆虫气味结合蛋白研究已进入细胞分子水平,昆虫学研究者希望从生化及分子水平弄清昆虫气味结合蛋白的生理功能,揭示昆虫气味结合蛋白与昆虫行为的关系.本文就昆虫气味结合蛋白的研究种类、生化特性、生理功能、目前存在关于昆虫气味结合蛋白如何执行其功能的假说等进行综述.     

数值相对论简介(Ⅰ)--爱因斯坦方程

对数值相对论中涉及的一些典型的算法进行了简单的介绍.在广义相对论中,引力场是由一组极其复杂的、相互耦合的、非线性的双曲或椭圆偏微分方程决定的.由于大规模并行计算机的运行速度和存储容量的飞速发展,在爱因斯坦场方程写出80多年以后终于有可能对在天体物理中十分令人关注的现象如黑洞或中子星的碰撞问题等,进行广义相对论性的三维模拟,进而诞生了数值相对论.     

快速原型制造中的数控加工容许速度

对快速原型制造中的数控加工容许速度进行了研究,运用泛灰色不确定性系统理论,建立了加工容许速度与加工半径的不确定性系统优化模型USMO-1,给出了精度检验方法.编制了MATLAB程序,给出了处理实例,并与各种模型进行了比较.该模型不仅适合于等间距建模,也适合于非等间距建模,具有精度高、使用简便等特点,值得在快速原型制造中推广使用.     

微生物发酵果渣蛋白饲料Ⅱ.发酵工艺条件的研究

对产朊假丝酵母和黑曲霉在苹果渣上混合发酵生产蛋白饲料的条件进行了研究.其最佳工艺条件为:接种比例3:1,接种量2%,pH4～5,最适温度28 C.利用1.5%尿素为氮源,培养基含水量70%左右.在上述条件下发酵48 h以后,蛋白质含量达到30%以上,且有酒香味,适口性好.     

猪苓母种培养基筛选研究

对猪苓[Grifola umbellata(Pets．ex Fr．)Pilat]进行了母种培养基筛选试验，结果表明，猪苓母种生长的最适培养基为：马铃薯100g，蔗糖10g，磷酸二氢钾1g，硫酸镁0．25g，维生素B15mg，琼脂9g．     

正规BZ—代数

引入正规BZ－代数的概念，证明了正规BZ－代数一定是零对称BZ－代数、拟结合BZ－代数一定是正规BZ－代数，并举例说明了其逆均不成立。同时还讨论了正规BZ－代数与分支有关的若干性质。     

Analysis of cDNA sequence, protein structure and expression of parotid secretory protein in pig

Parotid secretory protein (PSP) secreted abundantly in saliva, whose function is related with the anti-bacterial effect. The PSP cDNA has been isolated from pig parotid glands by 3′ and 5′ rapid amplification of cDNA end (RACE), based on the conserved signal peptide region among the known mammalian PSP. The result of homologous comparison shows that pig PSP and human PSP shares the high identity at the level of the primary, secondary and tertiary protein structure. A search for functionally significant protein motifs revealed a unique amino acid sequence pattern consisting of the residues Leu-X(6)-Leu-X(6)-Leu-X(7)-Leu-X(6)-Leu-X(6)-Leu near the amino-terminal portion of the protein, which is important to its function. RT-PCR, Dot blot and Northern blot analysis demonstrated that PSP was strongly expressed in parotid glands, but not in other tissues.