钼酸铵在Na_2O改性Al_2O_3载体上的热分解研究

本文利用热重分析（ＴＧ）和差热分析（ＤＴＡ）研究了Ｎａ_２Ｏ改性的Ａ１_２Ｏ_３担载的钼酸铵的热分解．实验发现，载体表面的酸碱性对钼酸铵分解的热效应有明显影响．Ｎａ_２Ｏ担载量低的样品在５７３～７７３Ｋ温度范围内有强放热效应；当Ｎａ_２Ｏ担载量适中时，放热效应随载体表面碱性的增强逐渐减弱；而Ｎａ_２Ｏ担载量高的样品则伴有吸热效应．本文还利用激光拉曼光谱（ＬＲＳ）对烘干和焙烧Ｍｏ／Ａｌ_２Ｏ_３样品分别进行了研究．     

经济植物茶条槭叶部没食子酸含量与树龄的关系

根据对不同树龄的茶条械叶部没食子酸含量的测定结果,分析茶条械叶部没食子酸含量与其树龄的关系,为茶篥械经济林的树控制提供可靠参数。     

基于VRGS的交通流微观仿真软件的开发

基于ＶＲＧＳ的交通流微观仿真软件对交通网络引入ＶＲＧＳ后的交通流进行仿真。本文阐述仿真模型的设计思想,介绍模型的框架结构,说明采用ＶｉｓｕａｌＢａｓｉｃｆｏｒＷｉｎｄｏｗｓ的程序实现方法。     

MRS study on lentiform nucleus in idiopathic Parkinson‘s disease with unilateral symptoms

OBJECTIVE: To investigate changes in magnetic resonance spectroscopy (MRS) of lentiform nucleus during the early stage of Parkinson's disease. METHODS: Twenty-five patients with idiopathic Parkinson disease with unilateral symptoms (IPDUS) and 25 healthy volunteers were enrolled in this study. MRS of the lentiform nucleus in each patient was taken and then concentrations of N-acetylaspartate (NAA), Creatine (Cr) and Choline (Cho) were calculated. RESULTS: Compared to that in the control, NAA/ (Cho+Cr) was significantly lower in the lentiform nucleus contralateral to symptoms and even that in the ipsilateral side in IPDUS patients (all P<0.05); while there was no difference between the two sides in the healthy volunteer (P>0.05). The ratio of NAA/(Cho+Cr) ipsilateral to the sympatomatic side of the patient was also lower than that of the control (P<0.05). CONCLUSIONS: There might be some changes with MRS on the lentiform nucleus during the early stage of idiopathic Parkinson's disease with unilateral symptom. MRS may be one of the reliable methods for early or even sub-clinical diagnosis.     

关于"教育强省"的思考

把四川建设成“西部教育强省”既是一个催人奋进的行动口号,又是实施西部大开发战略的重要组成部分。文章着重论述了建设教育强省提出的依据和背景,教育强省的内涵,界定教育强省的基本要求和主要标尺等问题。     

国际互联网技术与旅游业企业过程重组

信息技术、互联网、通讯技术的发展引起了整个旅游业的一场革命,正在深刻地改变着旅游业的经营、管理和运作模式。网络技术的出现则恰好给旅游业的加速发展、企业过程重组带来了新的机遇。文章集中分析了旅游业的信息特征、信息技术、互联网技术引起的旅游业的经营环境变化,提出了旅游服务供应链管理的概念。在此基础上,结合英特网技术在旅游业的功能,提出了旅游业的企业过程重组,建立虚拟旅游公司模式。     

Adsorption and catalytic combustion of ARB on CuO-Fe<Subscript>2</Subscript>O<Subscript>3</Subscript>

CuO-Fe2O3 composite material with strong magnetism and a large surface area is prepared by the co-precipitate method. Its adsorption properties towards Acid Red B (ARB) and the regeneration by catalytic combastion of organic compounds have been studied. The results show that the prepared CuO-Fe2O3 composite is an excellent adsorbent for ARB adsorption at acid condition. The presence of Cl^- has no effect on ARB adsorption. But the SO4^2- can inhibit ARB adsorption. After being recovered by the magnetic separation method, the adsorbent can be regenerated by catalytic oxidation of absorbate at 300℃ in air atmosphere. The combustion reactions of ARB in the presence or absence of CuO-Fe2O3 are studied by in situ diffuse refieclion FTIR. The results indicate that, in the presence of CuO-Fe2O3, the degradation temperature is significantly lowered by the catalysis of CuO-Fe2O3, and ARB can be oxidized completely without volatile organic compound by-product; in comparison, in the absence of CuO-Fe2O3, the temperature needed for oxidation of ARB is higher and the reaction is incomplete with some N-containing harmful compounds produced. The reusability of CuO-Fe2O3 is also studied in successive seven adsorption-regeneration cycles.     

大学英语习作评改方式刍议

文章对影响大学英语作文评改结果不理想的种种因素加以分析,指出评改过程中应注意的问题,并提出有益于提高评改效果的几种方式,如学生自评、学生互评、教师与学生面谈评改等,简单介绍了实施过程及注意事项。     

PLC梯形图设计中的关键技术

ＰＬＣ控制系统设计的核心问题是程序设计。本文介绍了ＰＬＣ梯形图设计前必须的准备工作以及ＰＬＣ梯形图设计中的基本规律和关键技术。