Trust assessment of business service workflow based on complex trust network

For business service workflow,QoS-based services selection can't guarantee whether the composite service satisfies user' s requirement after delivery,because once any service interrupts or quality of service(QoS) maliciously reduces,the quality of workflow will be reduced.Trustworthy services can provide reliable QoS,so trustworthiness research could improve the efficiency of services selection.This paper investigates trust assessment in the perspective of workflow.Firstly,trust network of business service workflow(TN-BSW) is proposed to analyze trust attributes;then,the trust measurement system of TN-BSW is investigated to assess the trust value quantitatively;and then,a trust-aware service recommendation model(TaSRM) is proposed to enhance the efficiency of QoS-basedservices selection;finally,experiment shows the feasibility of TN-BSWand the performance of TaSRM.     

基于遗传算法的凿岩钻进系统自寻最优控制

现有凿岩台车大多不具备自寻最优凿岩参数功能,凿岩钻进速度难以达到理论设计的最大值。为获取最大凿岩钻速,分析了多种影响因素,从中筛选出主要的可控变量。根据其难以构建准确的数学模型、非线性、时变性的特点,引入遗传算法作为自寻优核心思想,并设计了相应的控制系统。经验证,这种控制方法可以使钻进速度较快收敛至最大值。与传统的控制方法相比,该控制方法可根据岩石硬度自动匹配最优凿岩参数,有效地提高凿岩速度,大大减少凿岩施工所需时间。对于同类的凿岩设备自寻优控制同样具有参考价值。     

Research on an Agile Manufacturing Information System

1. INTRODUCTIONIn the rapidly changing global competitive environment, dynamic collaboration among companies is required to enable people and processes of the partners to be combined timely andcost-effectively, which will bring a complementary set of competencies to seize new marketopportunities. This relationship maximizes the combined competencies to achieve each company's strategic goal and provide solutions to meet their customers' needs [1]. Under thiscircumstance, the traditional inf…     

锂化分子筛的制备和应用研究

为能够有效、经济且工艺简单地去除锂离子电池非水电解液中的微量水，根据离子交换原理对普通4A分子筛进行锂化处理制备锂化分子筛。经实验验证，这种分子筛既能满足除水的要求，又能大大降低因和Li     

对二氯苯在泥炭上的吸附和解吸

对二氯苯在含有机质大于92%的泥炭上的吸附和解吸，表现出大的解吸滞后和非线性现象；解吸滞后的程度是:原状泥炭>酸处理泥炭>胡敏素；吸附的二氯苯经过6d解吸的比例低于28%;Freundlish方程较好地拟合对二氯苯的等温吸附或解吸线,1/n 为0.055~0.527解吸线的1/n显著低于吸附线的1/n值，而logK则明显地增加.Langmuir方程能很好地拟合解吸线，其Q_m大小次序是:胡敏素＞酸处理泥炭＞原状泥炭．对二氯苯的分配系数K_p随吸附平衡时间的延长或对二氯苯液相浓度的降低而增加；未处理泥炭的分配系数明显地高于胡敏素或酸处理泥炭．     

Past and future of computing science

The invention of computer and development of computing technology are great historical events in the twentieth century, which impact on society and the daily life of the human beings drastically. The development of com¬puting science and technology has been one of the primary forces driving people to enter the so-called information age. This paper attempts to present some viewpoints on the past and future of computing science, system-on-chip, software and man-machine interaction, with emphasis on computing science.     

一种恢复数字化畸变凸性图像的算法

介绍了一种恢复数字化畸变凸性图像的算法-增强算子，讨论该方法增强和恢复被高斯噪声畸变的凸性数字化图像的原理，并通过计算机模拟实例验证了增强算子处理畸变凸性数字化像点的有效性，该方法已用于处理Al-Mn-Si准晶的数字化高分辨电子显微镜（HREM）像，揭示了HREM像中的周期性特征。     

一种新型双线全双工数字电话机

介绍了一种新型双线全双工数字电话机，采用目前最先进的自适应回波抵消工作方式，克服了部分国家普遍采用乒乓方式传输距离短的缺陷。电路部分采用了MITEL公司最新推出的数字接口芯片MT9172和带HDLC协议控制器的数字电话专用芯片MT9092，并用MCS-51单片机控制。     

蚕蛹蛋白提取工艺优化的研究

以蚕蛹为原料,选用5种不同溶剂作为提取剂,采用索氏提取法提取蛹油制备脱脂蛹;对脱脂蛹采用二次回归正交旋转组合设计,以碱溶酸沉法提取蚕蛹蛋白.结果表明,正己烷为蚕蛹油最佳提取溶剂,其出油率为28.9%,提取蚕蛹蛋白的最佳条件为pH=10,料液比1:12,温度60℃,提取时间90 min,连续提取两次,提取率为48.22%;蚕蛹蛋白等电点为4.4,冻干后蛋白含量达到95.2%.     

6-氮杂胞嘧啶与甲酸氢键复合物稳定性的理论研究

采用密度泛函B3LYP方法,在6-31G(d,p)基组水平上对6-Aza与trans-HCOOH、cis-HCOOH及HCOO-形成氢键复合物进行研究,获得了20种稳定的氢键复合物,并获得了复合物的总能量、相对能和零点能。计算结果表明,6-Aza与trans-HCOOH、cis-HCOOH中H和O相连形成复合物的热力学稳定性为:M8>M1>M3>M2>M9>M6>M7>M12>M11>M15≈M16>M10>M5>M13>M14,其中6-Aza氨酮式和甲酸反式结构中的醇式结合形成复合物M8的稳定性最高。6-Aza与HCOO-反应的热力学稳定性顺序:M20>M19>M17>M18。