等离子束表面冶金涂层技术研究与应用

对等离子束表面冶金涂层技术与其他相近技术进行了比较。等离子束表面冶金涂层技术是一种快速非平衡冶金反应过程,类似粉末冶金,原则上可不受组成物的相溶性、熔点、密度等性质的限制,因此不需要预制合金雾化粉,可利用任意粉末的任意配比,获得通常冶金方法不能得到的(组织)物相。等离子束表面冶金涂层技术效率高,操作简便,成本低,应用前景广阔。     

船舶压载水沉积物的无害化处理与资源化利用

阐述了一些国内外对船舶压载水沉积物的处理方法及其资源化利用现状.考虑到压载水沉积物的特殊理化性质,提出了两种可用于压载水沉积物无害化处理的可行性方案,并针对处理后沉积物的性质提出了资源化利用方案.     

射频PECVD方法生长含氢非晶碳膜的结构及摩擦学性能

利用射频等离子体增强化学气相沉积技术在不锈钢表面制备了含氢非晶碳膜.采用Raman光谱、红外光谱、X射线光电子能谱和原子力显微镜等研究了薄膜的微观结构和表面形貌,在栓盘摩擦磨损试验机上考察了薄膜在不同载荷与滑动速度下的摩擦学性能.结果表明:所制备的含氢非晶碳膜具有典型的类金刚石结构特征,薄膜均匀、致密,表面粗糙度小;薄膜与不锈钢球对磨时显示出良好的抗磨减摩性能;薄膜的抗磨减摩性能同对磨件表面上形成的转移膜以及摩擦过程中薄膜结构的石墨化相关.     

A New Generalized Similarity-Based Topic Distillation Algorithm

The procedure of hypertext induced topic search based on a semantic relation model is analyzed, and the reason for the topic drift of HITS algorithm was found to prove that Web pages are projected to a wrong latent semantic basis. A new concept-generalized similarity is introduced and, based on this, a new topic distillation algorithm GSTDA（generalized similarity based topic distillation algorithm） was presented to improve the quality of topic distillation. GSTDA was applied not only to avoid the topic drift, but also to explore relative topics to user query. The experimental results on 10 queries show that GSTDA reduces topic drift rate by 10% to 58% compared to that of HITS（hypertext induced topic search） algorithm, and discovers several relative topics to queries that have multiple meanings.     

Microstructure and Corrosion Resistance of Cr7C3/γ-Fe Ceramal Composite Coating Fabricated by Plasma Cladding

A new type in situ Cr7C3/γ-Fe ceramal composite coating was fabricated on substrate of hardened and tempered grade C steel by plasma cladding with Fe-Cr-C alloy powders. The ceramal composite coating has a rapidly solidified microstructure consisting of primary Cr7C3/γ- and the Cr7C3/γ-Fe eutectics, and is metallurgically bonded to the degree C steel substrate. The corrosion resistances of the coating in water solutions of 0.5 mol/L H2SO4 and 3.5% NaCl were evaluated utilizing the electrochemical polarization corrosion-test method. Because of the inherent excellent corrosion-resisting properties of the constituting phase and the rapidly solidified homogeneous microstructure, the plasma clad ceramal composite coating exhibits excellent corrosion resistance in the water solutions of 0.5 mol/L H2SO4 and 3.5% NaCl.     

蒺藜皂甙对大强度训练大鼠血清ALT、AST、CK、LDH、BUN及睾酮的影响

研究了蒺藜皂甙对大强度训练大鼠血清ALT、AST、CK、LDH、BUN、睾酮水平生化指标的影响。对雄性SD大鼠进行7周大强度跑台训练,采用递增强度跑台训练,建立大强度耐力运动模型。结果显示:力竭运动后,蒺藜皂甙组大鼠血清ALT、AST、CK、LDH活性明显低于空白对照组(p<0.05p<0.01);蒺藜皂甙组大鼠血清BUN含量较空白对照组有显著的降低(p<0.01);蒺藜皂甙组大鼠血清睾酮水平明显高于空白对照组(p<0.01)。表明:蒺藜皂甙能减轻大强度耐力运动对大鼠肝脏、心肌、骨骼肌等组织细胞的损伤;蒺藜皂甙能提高大鼠睾酮水平,降低运动大鼠体内蛋白质分解,从而延缓大鼠运动性疲劳的产生。     

关于“诱导映射的一些性质”

纠正了Gentry K R的一篇论文(Some properties of the induced map, Fundamenta Mathematicae 66 (1969) 55-59)中的错误并推广该文中的一些定理，还给出了逆系统间的映射为极限正则映射的一个充分条件.     

内镜下氩离子凝固术治疗食管贲门失弛缓症疗效观察

目的：探讨氩离子凝固术治疗贲门失弛缓症的疗效。方法：选择2010年1月至2012年1月经食道吞钡及内镜检查诊断的贲门失弛缓症12例患者进行内镜下环行点状治疗后临床观察,治疗单次启动延续时间1～3 s,启动次数视局部组织凝固的深度而定,一般环行凝固4个点,深度0.2~0.3 cm为宜,术中局部喷1∶5去甲肾上腺素盐水10 mL,术后加用止血及抗感染药物及进流质饮食3 d,观察1周出院,所有病例1~3月内复查食道吞钡及胃镜检查。结果：12例患者中2例失访,其余10例患者均复查,临床症状消失,食道吞钡、胃镜下未见复发。结论：氩离子凝固术治疗是治疗贲门失弛缓症的新方法,操作方便,疗效较好,值得推广应用。