H_0~1[a,b]中的最佳数值积分公式

本文利用H10[a，b]中样条插值算子理论，讨论了H10[a，b]中的最佳逼近泛函，并给出最佳数值积分公式。     

结构系统疲劳可靠性分析方法及其应用

研究了结构系统疲劳可靠性分析方法，建立了结构系统疲劳可靠性分析模型，提出了求取结构系统疲劳主要失效模式的方法，最后，以一海上平台为工程实际算例验证了文中算法的可行性及有效性。     

R22饱和蒸气在水平双侧强化管外凝结换热的实验研究

对氟里昂制冷工质Ｒ２２在水平单管外的凝结换热性能进行了实验研究．传热管分别采用光管、低肋管及６根不同几何参数的双侧强化高效传热管．试验结果表明：强化管内侧强化换热效果为光管的２倍左右，管外凝结换热系数是光管的５～７倍．在冷凝温度为４０℃、管内冷却水流速范围为０．５～３．２ｍ／ｓ时，各强化管总的传热系数是低肋管的１～２倍，是光管的４～６倍     

圆内开缝八边形自然对流换热的数值分析

对圆内开缝八边形自然对流换热进行数值分析，数值计算发现，在一定的Ｒａ下，圆内开入边形自然对流流动随开缝度的增加其流型由双环充向叁环流转变，在这种转变的临界点换热量最大值，在开缝度Ｓ大约为０．４左右时，数值计算结果不是唯一的，与初始值有关（静态分歧）。当初始流场采用双环流流型时，数值计算得到双环流流场；而当初始流场为叁充流型时，数值结果将收敛于叁环流流场。     

带堆焊层钢管焊接接头耐蚀性的电化学评定

采用电化学测试技术评价了低碳钢管管端内壁不锈钢焊条堆焊后再用相同焊条进行打底焊所得焊接接头（特别是焊接热影响区）的耐蚀性，选用两种高合金焊条M2、M6，并对堆焊金属进行热模拟试验，测定了模拟热影响区不同部位在3％NaCl介质中的阳极极化行为．结果表明，按新工艺焊接的接头代替普通碳钢焊接接头可有效地提高管道接头的使用寿命．两种焊条中，含Nb的M2耐蚀性比M6好，铌能够有效提高接头的耐均匀腐蚀、晶间腐蚀和点蚀能力，热影响区600～1000℃是高合金接头耐蚀性最薄弱的区域，建议采用超低碳含铌高合金焊条，以解决热影响区的腐蚀问题．     

塑料注射模具冷却水道CAD

介绍了塑料注射模具冷却水道的计算机辅助设计。本软件为Ｐｃ级，主要应用传热学、化工原理的基本原理，开发设计了模具冷却水道计算模块，并对模具的冷却系统进行设计。     

吐哈盆地三叠纪孢粉地层学及古气候特征

吐哈盆地三叠系划分为韭菜园组、烧房沟组、克拉玛依组和黄山街组，通过对三叠纪地层的孢粉分析，建立了该盆地的四个孢粉组合带，Limatulasporites—Tae－niaesporites—Alisporites组合带、Aratrisporites—Punctatisporties组合带、Punc－tatisporites—Calamospora组合带和Cycadopites—Lophotriletes—Protoconiferus组合带。依据孢粉的演化得出吐哈盆地三叠纪的古气候为早期的干旱温暖到晚期的潮湿炎热。     

The strong cooperativity of dioxygen binding by dicobalt (II) diporphyrin compounds in nonaqueous solution at room temperature

Thermodynamic data were determined for the reversible binding of O₂ to two compounds of dicobalt(II) di(meso-tetra-phenyl)porphyrin derivatives with different lengths of diamidoaliphatic bridge (abbreviated to Co₂PP₈ and Co₂PP₄) in N,N-dimethylformamide at room temperature. The partial pressure of dioxygen necessary for half-oxygenation (P _1/2) and hill coefficient (n) at 298 K were determined as follows:P _1/2=54.2 kPa,n=2.0 for Co₂PP₈ andP _1/2=6.8 kPa,n=1.8 for Co₂PP₄, respectively. The rate equations of reversible oxygen binding by Co₂PP₈ were determined and the reaction path was proposed. The results of ther-modynamic and kinetic studies indicate that there exists strong cooperative effect during oxygenation of the compounds. The ESR observation reveals that the dioxygen complexes formed in the solutions are of superoxo (Co-O ₂ ⁻ ) type. Supported by the Research Foundation of the State Education Commission of China Zhou Xiaohai: born in 1962, Ph.D. Associate professor     

Interface bond mechanisms of ceramic-cemented carbide compact insert

Conclusion Ceramic-cemented carbide compact inserts have been developed by hot-pressing sintering techniques, the upper part of the compact insert is of Al₂O₃ + TiB₂ ceramic material, while the base part of the compact insert is of WC + Co cemented carbide. The compact insert makes full use of the advantages of the high hardness of ceramic materials and the high strength of cemented carbide, and its mechanical properties are just between that of Al₂O₃ + TiB₂ and WC + Co. SEM, XRD and electron microprobe analysis showed that element diffusion and formation of new phases are the main causes for the bond of Al₂O₃ + TiB₂ with WC + Co in the interface.     

Mg^＋,Nb^＋离子注入对SnO2薄膜晶粒热稳定性的影响

采用Ａｒ＾＋离子溅射方法将３００ｎｍ ＳｎＯ２薄膜沉积在Ｓｉ片上，分别对膜层进行６０ｋｅＶ，５×１０＾１６ｃｍ＾－２Ｍｇ＾＋离子注入和１００ｋｄＶ，６×１０＾１６ｃｍ＾－１Ｎｂ＾＋离子注入，对未注入，Ｍｇ＾＋离子注入，Ｎｂ＾＋离子注入３种薄膜进行５００℃，４ｈ退火处理．