阳离子微粒聚合物在造纸工业中的应用

采用乳剂和溶液的聚合技术制备了不同电荷密度和胶体性质的阳离子微粒聚合物(CPMP)。论文探讨了阳离子微粒聚合物在造纸工业中的应用。研究表明用阳离子或阴离子的聚合物与阳离子微粒聚合物联合使用可以改善纸张的匀度和留着率。其机理可能是由干阳离子微粒聚合物的加入产生了更有效的架桥絮聚。另外阳离子微粒聚合物也是一种良好的施胶剂，研究结果表明施胶效果与聚合物添加量．电荷密度和微粒尺寸有关。通过施胶张可以获得更好的光学和物理性能。     

燃料添加剂对柴油机烟粒燃烧的影响

考察了燃料添加剂对降低柴油机烟粒燃点温度的效应。含金属添加剂的柴油机烟粒被收集在金属纤维过滤器上,把原状烟粒样品移入实验室反应器,用模拟柴油机排气进行燃烧试验。实验结果表明,当烟粒中含有Pd或Cu时,烟粒的燃点温度可降至430℃左右(普通柴油机烟粒的燃点温度约600℃);Pd的添加还可大大降低烟粒一次燃烧产物中CO的分率。文中还对金属(催化剂)/烟粒接触程度和添加剂溶液中可燃性部分对烟粒燃烧的影响作了讨论。     

Hydrostatic settling velocity of sediments

The settling of sediments is an accelerative process in which the concentration of the main sediments zone will heavily influence settling velocity, but the explicit relationship between the concentration and settling velocity has not been reported in literature. Here a theoretical function was built for the time dependent concentration and time dependent settling velocity of sediments ; then the entire settling process reflecting concentration was shown on the basis of sediments instant-settlement theory and mathematical method. Agreement of computed results and experimental data was found. Several governing parameters, including particle size,particle density,inltial suspended sediments concentration and suspension height, were discussed with a series of calculated velocity curves. The research indicated that (1) the presented concentration-velocity time relationship is rational, (2) settling process of the sediments group with variation of concentration consists of acceleration stage, uniform motion stage and deceleration stage, and (3) particle size, particle density and initial suspended sediments concentration have more influence on the settling velocity than the suspension height and water temperature.     

Mechanical Properties of Laterally Driven Microresonance with a One-Side Straight-Leg Suspension

The mechanical properties of lateral polysilicon comb-driven microresonators suspended from one-side straight-leg beams, which are widely used in linear microvibromotors, are investigated in this paper.The lateral vibration of the microresonator was modeled assuming that the symmetry of the microstructures and the applied loads are different. Methods were given to calculate the stress, lateral displacement, spring coefficient, and resonant frequency. The results show that the simple mechanical model is a superfluous system with three unknown variables. The results differ from pervious results for a microresonator suspended from double-side straight-leg beams, which has been commonly used to design linear microvibromotors.     

氯仿在悬浮TiO2体系中的降解

分别用光还原沉积法制备的掺铂TiO2纤维和商用TiO2作为催化荆，对氯仿进行光催化降解。通过测定Cl^-浓度发现不同通O2方式对氯仿的光降解有很大影响，O2的存在，促进了氯仿的降解；并进一步对溶液中的溶氧量(DD)测定，发现DO值呈线性下降且氯仿降解过程中有氧降解和无氧降解2种机理是共存的；同时发现上述2种催化剂的反应现象大相径庭，并结合了有机质液相吸附理论对其反应现象进行分析，发现纤维状微观结构是其高光催化性能的直接原因。     

植物激素影响扁藻生长的生理效应

用三类四种植物激素影响扁藻生长和某些代谢过程的试验结果表明:NAA、2.4-D 和 GA_3不论是单独使用,或是它们之间的组合,对扁藻的生长,光合和呼吸强度,对氮素的吸收均有促进作用。单独使用时,NAA、2.4-D在0.5mg/L;GA_3在0.1mg/L 的效果最好。然而,6-BA效果较差。激素之间的组合,除6-BA 与 GA_3的组合具有抑制作用外,其余的组合均有增效作用。植物激素能促进扁藻的生长,与提高藻类的代谢水平有关,代谢水平的提高,便为藻类的生长提供了必要的物质和能量基础。     

压缩系数的微粒群优化算法的收敛性分析

该文利用矩阵理论对具有随机数的压缩系数的微粒群优化算法进行了收敛性分析,给出了c=d=1和c=1两种收敛性结果,同时图形化给出了参数选择准则.     

炫酷科技

1 蜘蛛侠手套；2 可大可小的如意纸椅；3 磁力悬浮床；4 无线光鼠“空中”耍；5 拥抱衫；6 能感觉到人走近的广告牌；7 会潜水的飞机。[编者按]     

燃烧微粒光学特性的测量与计算

采用快速Ｆｏｕｒｉｅｒ变换红外光谱议（ＦＴＩＲ）对不同煤种及其灰渣的光学吸收指数Ｋ进行了测量，进而利用这些数据以及Ｍｉｅ光学理论计算得到了火焰辐射传热计算中所必须的重要参量－－颗粒的散射和吸收有效因子以及相位函数。     

水稻花粉悬浮培养及其在育种上的应用

评估了２０个水稻品种离体花粉悬浮培养产生愈伤组织和再分化植株的能力，并进行了花粉悬浮培养试验，结果表明；品种之间反应差异很大。来源于日本的“黎明”（粳稻）最敏感。“黎明”植株再分化的频率达８４．１％。在愈伤组织的形成和植株再分化过程中，除其它一些因子外，基因型的差异有一定制约作用。通过水稻花粉悬浮培养诱导出的新品系“Ｎ１０”，其特征有：早熟，穗大，株高（９０～１００ｃｍ），产量高和抗稻瘟病等。