微通道中两相流压降与传质的研究

以氮气和水为实验体系,采用均质混合模型,研究微混合器的微通道中两相流通过微通道的压降,并测定了两相流的传质系数.结果表明,微通道当量直径为95.2 μm,气体速率为1.089～4.355 m/s,液体速率为0.006 41～0.170 90 m/s的条件下,均质混合模型计算压降值与实测值吻合良好.气速为1.633～3.484 m/s,液速为0.025 6 m/s时,随着气速增加,传质系数呈递增的趋势.气速为1.633～3.484 m/s,液速为0.019 2 m/s时,随着气速增加,传质系数先增加后降低然后再增加.传质系数对液速变化更为敏感.     

硼泥陶粒及其混凝土的试验研究

介绍用工业废渣硼泥作主要原料，掺一定比例的膨胀剂，生产轻质、高强、保温的硼泥陶粒及配制LC30硼泥陶粒混凝土的试验。     

Learning high-dimensional correspondence via manifold learning and local approximation

The recent years have witnessed a surge of interests of learning high-dimensional correspondence, which is important for both machine learning and neural computation community. Manifold learning–based researches have been considered as one of the most promising directions. In this paper, by analyzing traditional methods, we summarized a new framework for high-dimensional correspondence learning. Within this framework, we also presented a new approach, Local Approximation Maximum Variance Unfolding. Compared with other machine learning–based methods, it could achieve higher accuracy. Besides, we also introduce how to use the proposed framework and methods in a concrete application, cross-system personalization (CSP). Promising experimental results on image alignment and CSP applications are proposed for demonstration.     

国产耐火砖在德士古水煤浆气化炉的使用

分析气化炉耐火材料损蚀原因及国产耐火砖在德士古水煤浆加压气化炉中的使用情况，使用结果证明，国产耐火砖可以替代进口砖，每年节约设备投资600万元左右。     

塑料旋转成型用原料的特点、品种和发展

对塑料旋转成型用原料的特点和品种进行总结和讨论，并介绍了最新的发展情况。随着塑料旋转成型的工艺技术的发展，该项工艺可用的原料品种正在大大拓广，旋转成型在塑料加工工艺中的重要性日益增加。     

凉味剂左旋薄荷酰胺的合成

凉味剂WS 3 (即N 乙基 L 薄荷基甲酰胺 )可以左旋薄荷醇为原料 ,经氯代、羧酸化和酰胺化三步制成 ,以左旋薄荷醇为起始原料计 ,总产率为 3 0 .1 %。中间体 ( 1R ,2S ,5R) ( ) 氯代薄荷、( 1R ,2S ,5R) ( ) 薄荷基羧酸、( 1R ,2S ,5R) ( ) 薄荷基羧酸酰氯和终产品N 乙基 L 薄荷基甲酰胺通过GC、m .p.、旋光度的测定及红外光谱等分析确证其与目标产物结构一致。左旋的凉味剂WS 3凉味纯正强烈 ,无杂味。     

采用主监视窗扩展技术的增强现实三维注册方法

在增强现实三维注册中,采用重新检测策略时顿卡现象严重。提出一种采用主监视窗扩展技术的增强现实三维注册方法。在检测阶段,引入特征点可信度和主监视窗,并设计主监视窗的分割、扩展和调控策略,大幅提升了计算速度;在跟踪阶段,采用基于图像金字塔的光流算法进行特征点跟踪。实验证明,该方法不仅有效缓解了顿卡现象,也提升了系统整体的实时性。     

2，6－二氯－4－硝基苯胺的合成

以盐酸－过氧化氢为氯代试剂，由对硝基苯胺制备了２，６－二氯－４－硝基苯胺。结果表明，过氧化氢的比例、反应温度对收率有较大的影响。过氧化氢过量，反应温度在５０℃时，可缩短反应时间，提高收率。     

Structure and dynamics of a pentablock copolymer of polystyrene-polybutadiene in a butadiene-selective solvent

We have examined solutions of a polystyrene-polybutadiene pentablock copolymer in n-heptane, a strongly selective solvent for polybutadiene. Small angle neutron scattering from 7 to 15% samples reveals domains about 10 nm in radius formed by the association of 200 polystyrene blocks. Dynamic light scattering measurements on 8 and 9% samples showed three modes: a fast diffusive mode related to the collective diffusion in semidilute solutions/gels; a relaxational mode related to the local dynamics of polystyrene domains trapped in the gel formed by bridging the domains with the polybutadiene chains; and a very slow diffusive mode. The relaxational dynamics persisted over the entire temperature range, becoming faster with increasing temperature, indicating a decreased microviscosity at higher temperatures. The slow dynamics seems to be connected with heterogeneities in the physical gel due to microsyneresis and almost disappeared above 50 °C. Macroscopic phase separation into two liquid phases was observed in a dilute solution of the un-associated copolymer, and into a liquid and gel phase at higher concentrations. The absence of flower-like micelles in dilute solutions and the macroscopic phase seperation suggest that the gels in the pentablock are formed by random association of multiplet domains and not by bridging of micellar domains.     

Electrochemical copolymerization of carbazole and 3‐methylthiophene

The copolymerization of carbazole (CZ) and 3‐methylthiophene (3MeT) was successfully performed electrochemically in freshly distilled boron trifluoride diethyl etherate by direct anodic oxidation of the monomer mixtures, although the oxidation potentials of CZ and 3MeT were quite different. The electrochemical properties of the copolymers were studied with cyclic voltammetry. The influence of the applied polymerization potential on the synthesis of the copolymers was investigated. The higher potential favored the incorporation of 3MeT units into the copolymers. The insertion of 3MeT units into polycarbazole (PCZ) was helpful in improving the conductivity of PCZ. The novel copolymers had the advantages of both PCZ and poly(3‐methylthiophene), that is, good redox activity, good thermal stability, and high conductivity. The structure and morphology of the copolymers were investigated with ultraviolet–visible, infrared spectroscopy, thermal analysis, and scanning electron microscopy. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1877–1885, 2006