组成对分相-析晶乳浊釉显微结构及表面性质的影响

采用X射线衍射、透射电镜和扫描电镜等测试手段,研究了不同组成对分相-析晶乳浊釉显微结构及釉面性状的影响.研究表明:B2O3和P2O5能促进分相形成,并且由于分相具有很小的表面张力而使其液滴易于长大.适量引入CaO能使液滴尺寸增大,体积分数提高,但过量引入会由于析晶而使体积分数降低.控制分相液滴尺寸接近可见光波长以及使釉中析出适量钙钠长石晶体可获得最佳的乳浊效果,而液滴过大或过小都难以获得较佳的乳浊效果.     

双单体接枝聚丙烯的制备及性能研究

研究了以苯乙烯（St）为共聚单体，聚丙烯（PP）熔融接枝丙烯酸（AA）的反应工艺。探讨了AA、共聚单体及引发剂用量等因素对接枝反应的影响。通过FTIR分析证实，AA和St接枝到PP链上形成PP-g-AASt接枝物，并且随着引发剂DCP用量的增大，接枝率呈现先升后降的趋势。通过TGA、WAXD及DSC等方法表征了接枝物的热性能和结晶性能。结果表明，随着接枝产物的接枝率的提高，其分解温度及最大失重率温度先上升，维持一段后再下降。而AA和St主要接枝在PP表面上，未破坏原来的晶型，少量的AA有利于结晶成核，提高结晶度。     

高压旋喷锚杆在黄土深基坑支护中的模拟研究

为了研究高压旋喷锚杆支护体系在黄土深基坑工程中的工作性状,选取西安某深基坑支护工程为研究对象,运用MIDAS/GTS软件对该支护体系进行了有限元数值模拟,并与二次注浆锚杆支护体系的模拟结果进行了对比分析。结果表明:两种基坑支护方式均可满足该基坑支护的技术要求,但采用高压旋喷锚杆支护时,需要锚杆的总长度为二次注浆锚杆长度的62%,且高压旋喷锚杆筋体可实现回收,降低了锚杆施工对周围土层的干扰,其在黄土地区高边坡及深基坑支护工程中有着广阔的应用前景。     

A THEORETICAL STUDY OF MASS AND HEAT TRANSFER IN FILM FLOW OF NONNEWTONIAN POWER LAW FLUIDS

The exact expressions of concentration and local or average Sherwood number,Sh or Sh for non-Newtonian fluids which obey the famous power law:τ={K|1/2(1/2)~(1/2)|~(n=1)}in which the flow index n takes any positive rational value,have been obtained by solving the differen-tial equation of diffusion together with the velocity distribution in the falling film flow.The use of Fourth-order Runge-Kutta method and Wegstien's iteration method by means of thecomputer yields results which are a series of values of dimensionless concentration O,local and averageSherwood number for n equal to 1/4,1/3,1/2,1/1.4,1/1.2,1,1.25,2.5,and ∞.When the flow indexn=1,i.e.for Newtonian fluids,the result agrees well with the data from the literature.     

纳米氧化锌在全钢载重子午线轮胎胎面胶和胎侧胶中的应用

研究纳米氧化锌作为活性剂替代普通氧化锌在全钢载重子午线轮胎胎面胶和胎侧胶中的应用效果.结果表明,纳米氧化锌替代普通氧化锌可以提高胶料的加工安全性和弹性,改善胎面胶的耐磨性能;纳米氧化锌减量约30%替代普通氧化锌,胎面胶和胎侧胶的综合性能较好,原材料成本降低,成品轮胎的高速性能提高.     

对叔丁基苯硼酸的合成及表征

以对叔丁基溴苯为原料，在氮气保护下，通过格氏反应合成了对叔丁基苯硼酸，考察了温度、反应时闻和物料配比等因素对收率的影响，优化合成条件为：n（对叔丁基溴苯）：n（硼酸三甲酯）=1：1．5，反应温度为-20-30℃，反应时闻140min，总收率69．5％。质谱和核磁共振光谱分析表明所得产物与目标产物结构一致。     

A GPU-based parallel method for evolutionary tree construction

Evolutionary trees are widely applied in various applications to show the inferred evolutionary relationships among species or entities. Neighbor-Joining is one solution for data-intensive and time-consuming evolutionary tree construction, with polynomial time complexity. However, its performance becomes poorer with the growth of massive datasets. Graphics Processing Units (GPUs) have brought about new opportunities for these time-consuming applications. Based on its high efficiency, a GPU-based parallel Neighbor-Joining method is proposed, and two efficient parallel mechanisms, data segmentation with asynchronous processing and the minimal chain model with bitonic sort, are put forward to speed up the processing. The experimental results show that an average speedup of 25.1 is achieved and even approximately 30 can be obtained with a sequence dataset ranging from 16,000 to 25,000. Moreover, the proposed parallel mechanisms can be effectively exploited in some other high performance applications.     

红藻条斑紫菜R－藻红蛋白中的能量传递过程

本文通过对条斑紫菜Ｒ－ＰＥ（藻红蛋白）及其α－β－γ亚基的吸收光谱和荧光光谱进行计算机解叠，研究了Ｒ－ＰＥ内发色团之间的能量传递过程，并对Ｒ－ＰＥ及亚基内的各发色团进行了“ｓ”和“ｆ”型的指认。发现在亚基中为“ｆ”型的发色团在Ｒ－ｐＥ（αβ）＿６γ中起着“ｓ”型发色团的作用，且将能量传递给最后的“ｆ”型发色团。荧光激发偏振光谱进一步证明了Ｒ－ＰＥ内的能量转移过程与计算机解叠的结果一致。     

刑事案件现场中微量玻璃的检验及应用

论述了刑事案件现场上微量玻璃检材的组成、提取与包装、检验方法以及在侦破刑事案件中的应用.     

亚麻粗纱煮漂工艺研究

亚麻粗纱优化煮漂工艺如下:(1)在100℃时,用3.5g/lNaOH碱煮30分钟;(2)在80℃时,在pH值为4.5,经30分钟完成亚漂;(3)在90℃时,pH为9的条件下处理20分钟完成氧漂;经煮漂的纱其纤维素含量提高了10.38%,果胶质、木质素、脂蜡等含量下降到了较好的水平,白度达到69.68%,大幅度改善了亚麻的纺织性能和服用性能。