化工传热过程计算方法的分析

通过分析比较化工传热过程计算中的平均温度差法(MTD法)和传热单元数法(NTU法),找出了它们之间的内在联系,结合这两种方法的优点,组合成了一种新的计算方法,应用于化工传热过程的计算,可使计算过程大为简便,同时又可评价换热设备流动型式的合理性。     

区间值函数和Fuzzy值函数的常微分方程解的性质

将普通常微分方程解对初值的连续性和可微性加以推广，得到了区间值函数的常微分方程解对初值的连续性和可微性．在此基础上，应用Ｆｕｚｚｙ集的分解定性，讨论了Ｆｕｚｚｙ值函数的常微分方程解对初值的连续性和可微性．     

Template/surfactant free and UV light irradiation assisted fabrication of Mn-Co oxides composite nanorings: Structure and synthesis mechanism

A facile, green, cost effective, and template or surfactant free strategy via a two-step route i.e. UV irradiation followed by dissolution-growth for the controlled synthesis of Mn-Co composite nanorings at room temperature was proposed. The nanorings structures and the process were systematically studied via TEM, HRTEM, EDX and XRD. Bir-MnO_2 nanosheets first formed through the direct photolysis of KMnO_4 under UV light irradiation. This was followed by a dissolution-growth process via the dissolution of Bir-MnO_2 nanosheets by the generated H~+ from the redox reaction between the added Co(NO_3)_2 and residual KMnO_4, as well as the accompanied formation of CoOOH, and Mn-Co composite nanorings. It was found that a balance between the dissolution and growth rate was needed. Suitable pH, KMnO_4 presence and the starting nanosheets like Bir-MnO_2 were the key factors for the formation of nanorings. The obtained Mn-Co nanorings/TiO_2 showed enhanced efficiency for the catalytic oxidation of HCHO. Based on the above understandings, it is believed that the developed dissolution-growth method can be adopted for the designing and preparation of other Mn-Co composite nanostructures which can be further applied for environmental pollution remediation.     

普适计算环境下三维模型的错误保护编码

 普适计算环境普遍存在传输信道误码率高的问题。三角网格模型由于不规则的网状结构,对于传输错误非常敏感。为提高三角网格模型在普适计算环境下的传输质量,提出了一种三维模型的错误保护编码方案。将三维模型数据编码为类似二维图像的方式,三角网格模型不规则的网状结构被消除,数据关联性大为降低,误码弹性得到根本改善。为了进一步提高编码效率,给出了基于错误保护的压缩编码方案。为了控制创建过程中产生的参数化误差,还提出了一种均匀准保角平面参数化方法,确保了重建的三维模型忠实于原始三维模型。模拟试验的结果表明,与常规的三角网格编码方法相比,这种编码方法改善了三维模型数据的误码弹性,并只需较少的存储空间。     

有限元混合法求解几种特殊弹性接触问题时的处理方法

用弹性接触有限元混合法求解弹性接触问题时，对有些特殊的接触情况会导致有限元方程组病态，从而使接触求解失败。对此作了分析讨论，找出了接触求解失败的原因，并提出了相应的处理方法。该法根据接触情况，适当修正相应的病态矩阵，从而使特殊的接触问题有解。     

Candidate Multi-Peptide-Vaccine Against Classical Swine Fever Virus Induces Strong Antibody Response with Predefined Specificity

IntroductionClassical swine fever virus(CSFV) is a pestiviruswhich causes significantmortality and morbidity inpigs.An epidemic of CSFV in a high pig densityarea can result in devastating financial losses,because few infected pigs can be effectively cured.In many countries in Europe and Asia,classicalswine fever (CSF) is controlled by vaccinationwith commercially available vaccine strains,suchas the Chinese vaccine strain(C-strain,i.e.,hogcholera lapinized virus) orsome modified-live vir…     

各种二次包络环面蜗杆传动的内在关系和类型选择

各种类型的二次包络环面蜗杆传动之间存在着统一的内在关系。本文主要研究反映这种关系的建立在啮合理论基础上的统一的典型传动条件方程.研究的结论有助于传动的正确设计和类型的合理选择,并为研究新型二次包络环面蜗杆传动提供了理论基础和新思路.     

压顶梁作用的弹性地基梁法的分析

考虑压顶梁对围护结构的约束作用和土压力的空间效应,对现有弹性地基梁法进行改进,结合工程实例,分析了压顶梁约束下围护结构内力及变形的规律,并与平面问题进行了比较.     

胶束溶液中正脂肪酸乙酯的皂化反应

在２０℃和３０℃下，用热动力学面积差法（两点法）研究了极性聚合物（聚乙二醇）、ＣＡＴＢ阳离子表面活性剂及其混合胶束对乙酸乙酯皂化反应的影响；在３０℃下研究了短链醇（乙醇）与ＳＤＳ阴离子表面活性剂混合胶束对正丙酸乙酯皂化反应的影响。结果表明：单一和混合胶束对正脂肪酸乙酯的皂化反应有较强的禁阻作用。还讨论了禁阻作用的原因。     

基于IDC的校园管理信息服务的安全性

对校园管理信息服务的安全性进行了讨论，给出了ＩＤＣ（Ｉｎｔｅｒｎｅｔ Ｄａｔａｂａｓｅ Ｃｏｎｎｅｃｔｉｏｎ）下具体的安全借施，并进一步提出了全面解决校园网应用安全问题的系统模型。