光源对TiO2纳米粉体催化效果的影响

以钛酸丁酯为前躯体,采用溶胶-凝胶法制备TiO2粉体,并通过TEM和XRD分析方法对其结构性能进行表征.检测结果表明:TiO2粉体由5-10nm的球形颗粒组成,晶型为锐钛矿型.通过在不同光源下催化降解水杨酸溶液,对其光催化活性及影响因素进行了分析.实验结果表明:紫外光下此TiO2纳米粉体的光催化活性较高.     

Origin法拟合Ni2FeAl超顺磁性的研究

Heusler合金Ni2FeAl甩带样品具有超顺磁性,铁磁相和顺磁相在高于Blocking温度时共存。本文运用M.Pissas等人对铁磁和顺磁相的研究方法,对Ni2FeAl的超顺磁现象进行Origin拟合研究,表明随着温度的增加系数α不断增大,铁磁在向顺磁转变,但仍处在超顺磁范围内。     

A tale of two literatures: Transaction costs and property rights in innovation outsourcing

This paper investigates the relative importance of property rights and transactions cost factors in driving the decision of firms to outsource innovation. Using data for over 8000 firms from the UK Community Innovation Survey, we find that property right factors dominate over transaction cost factors. Transaction cost variables are more important for process innovation, while property rights variables are more significant for firms involved in product innovation. In addition, we find that firms involved in process innovation have a higher probability of outsourcing innovation than firms involved in product innovation.     

Stability and dissipative analysis for a class of stochastic system with time-delay

This paper deals with the stability and dissipative problem of a class of stochastic hybrid system. The system under study involves Markovian jump, impulsive effects and time delay, which are often encountered in practice and are the sources of instability. Our attention is focused on analysis of whether the stochastic hybrid system with time-delay is stochastically asymptotically stable and strictly (Q, S, R) dissipative. By introducing an extra artificial time instance, the equivalent system is obtained and the sufficient conditions are derived by using linear matrix inequality (LMI) techniques. The main results of this paper unify the existing results on H_∞ control.     

负热膨胀材料ZrV_2O_7研究进展及应用

本文总结了近年来国内外文献ZrV2O7研究进展,讨论了常用的合成方法以及负热膨胀的机理。并介绍了ZrV2O7复合陶瓷的研制与应用,指出了负热膨胀材料ZrV2O7潜在的应用领域,并对其发展趋势和应用前景进行了预测。     

不同年龄自发性高血压大鼠血管平滑肌Ca2+/CaM-PP活性变化

目的研究不同年龄自发性高血压大鼠血管平滑肌Ca2+/CaM-PP活性变化.方法应用酶活性测定方法,对12周、16周SHR大鼠和Wistar大鼠的A、MA、CA血管平滑肌Ca2+/CaM-PP进行活性比较.结果Wistar大鼠随年龄增长,Ca2+/CaM-PP活性呈上升趋势,而SHR鼠其阻力血管该酶活性降低,但随年龄变化不明显.结论①自发性高血压使阻力血管平滑肌Ca2+/CaM-PP下降,但12周与16周间无显著差异.②不同种鼠血管平滑肌该酶活性变化不同.     

电视节目制作网络化探讨

数字化、网络化技术的迅猛发展，为电视制作带来了全新的工作模式和理念。现代化的工作流程应该基于网络化结构，在各个职能部门和栏目间传递数据流和文件，采用自动化的业务和管理方式，众多工作可以并行处理。而非线性编辑网以其高效率、低成本优势在电视台节目后期制作中日益得到推广、普及，成为电视台数字化推进工作的龙头和重点。     

肥胖与2型糖尿病的关系

目的:探讨肥胖与2型糖尿病的关系.方法:随机选取93例患者,根据体质指数(BMD=体重/身高2,分为正常组20例(BMI＜25),超重组33例(BMI≥25),肥胖组40例(BMI≥30).分别比较2型糖尿病的患病率.结果:肥胖组与超重组2型糖尿病患病率(40.0%、27.3%)均高于正常组(10.0%).肥胖组与超重组之间2型糖尿病患病率无显著性差别.结论:肥胖是导致2型糖尿病发生的重要因素.     

论B2C电子商务网站建设中的问题及其对策

介绍了B2C电子商务网站建设中存在的问题,提出了实用的解决办法。     

氨氧化制硝酸实验探究

探索氨氧化制硝酸的最佳实验条件．从催化剂的种类、氨水的浓度、氧气浓度的选择进行对比实验．实验结果表明：以三氧化二铬、铜丝为催化剂，氨水配比1．5：1和1：1，通入空气时实验效果最佳．