Identifying framework titanium in TS-1 zeolite by UV resonance Raman spectroscopy

Framework titanium in Ti-silicalite-1 (TS-1) zeolite was selectively identified by its resonance Raman bands using ultraviolet (W) Raman spectroscopy. Raman spectra of the TS-1 and silicalite-1 zeolites were obtained and compared using continuous wave laser lines at 244, 325, and 488 nm as the excitation sources. It was only with the excitation at 244 nm that resonance enhanced Raman bands at 490, 530, and 1125 cm(-1) appeared exclusively for the TS-1 zeolite. Furthermore, these bands increased in intensity with the crystallization time of the TS-1 zeolite. The Raman bands at 490, 530, and 1125 cm(-1) are identified as the framework titanium species because they only appeared when the laser excites the charge-transfer transition of the framework titanium species in the TS-1. No resonance Raman enhancement was detected for the bands of silicalite-1 zeolite and for the band at 960 cm(-1) of TS-1 with any of the excitation sources ranging from the visible tb UV regions. This approach can be applicable for the identification of other transition metal ions substituted in the framework of a zeolite or any other molecular sieve.

C离子注入Si中Si-C合金的形成及其特征

利用离子注入和高温退火的方法在Si中生长了C含量为0.6%-1.0%的Si_(1-x)C_x合金，研究了注入过程中产生的损伤缺陷，注入C离子的剂量及退火工艺对合金形成的影响，探讨了合金的形成机理及合金产生的应变分布的起因，如果注入的C离子剂量小于引起Si非晶化的剂量，退火过程中注入产生的损伤缺陷容易与C原子结合形成缺陷团簇，难于形成Si_(1-x)C_x合金，而预先利用Si离子注入引进损伤有利于Si_(1-x)C_x合金的形成；但如果注入的C离子可以引起Si的非晶化，预先注入产生的损伤缺陷不利于Si_(1-x)C_x合金的形成。与慢速退火工艺相比，快速热退火工艺有利于Si_(1-x)C_x合金的形成。离子注入的C原子在空间分布不均匀，退火过程中将形成应变不同的Si_(1-x)C_x合金区域。

Research for HIRFL new improvement project

According to the newest matching mode between the two cyclotrons at HIRFL, the beam obit properties were researched, especially for the harm of existing ‘over-magnetic shim’ in SSC as well as the trajectory in the new mode. The results obtained are encouraging.

企业经营风险决策的组织行为学研究

This thesis has investigated the risk preferences of the Chinese company managers in kinds of simulated decision situations and their perceptions of risk concerning types of business decisions. Four studies are conducted: Study I is utility analysis. 214 company managers and 46 middle - school headmasters have responded to Utility Measurement Survey. The results indicate: (1) The risk preferences of the managers vary in the different decision situations. In most of the situations, most of the managers are risk aversion; In few situations, they are risk-seeking. (2) In some of the decision situations, there are significant differences on risk preference between business managers and school headmasters, male managers and female managers, senior managers and junior managers, managers with high qualifications and managers with low qualifications, non-state-owned firms' managers and state-owned firms' managers, medium-small sized firms' managers and large-sized firms' managers. In the other situations there aren't significant differences between them. (3) In all of the decision situations, so significant differences on risk preference are found among managers with different marriage, experience, age and education. Study II is risky decision simulation. The Risky Decision Situations Simulation Survey is administered to 82 company managers. The result indicates that firm culture, business condition, survival limit and risk preference of the superior influence the managers' risk decision-making behavior. Study III is perceptions of business decision risks. 68 company managers have filled in Decision Cases Risk Perception Inventory. The results indicate: (1) Inaccurate market analysis and prediction, instable politics and the changes of economic policy are the more risky elements to strategy decision. (2) Erroneous market analysis and prediction, appearance of new technology and the changes of market demands are the more risky elements to investment decision. (3) Poor quality control, backward technology and too large stocks are the more risky elements to production decision. (4) Shortage of development fund, wrong choice in development project and limitation of the development ability are the more risky elements to new production development decision. (5) No payment of the foreign partner's capital, the changes of national relevant policy, difficulty in marketing, too high selling prices of foreign partner's equipments are the more risky elements to joint-venture decision. (6) Unfamilarity with oneself and misjudgement in qualification of oneself are the more risky elements to personnel decision. (7) Bad market of the product, defects in product quality and the changes of consumers demands are the more risky elements to marketing decision. (8) Wrong strategy and ambiguous goals are the more risky elements to public relation decision. (9) Violation of the law, ambiguous goals and poor creation are the more risky elements to advertisement decision. (10) Deterioration of diplomatic relations, unsuitable products for foreign consumers and unfamilarity with foreign market are the more risky elements to international business decision. Study IV is structured interview. 5 company managers have answered all questions of the Interview Questionnaire. The results indicate: (1) The managers think that risks are the possible unfavourable consequences of decisions; (2) The self-ratings of the managers coordinate with the results of utility measurement; (3) The managers admit that risks always accompany bussiness decision; (4) Individual difference is found among managers on risk perception. This thesis has also pointed out the important implications of the research and discussed several further questions.

洱海四种鲤鱼线粒体DNA遗传相似性的初步研究

用6种限制性内切酶对洱海的四种鲤鱼--洱海鲤(C. barbatus)、春鲤(C. longipectoralis)、大眼鲤(C. megalophthalmus)和杞麓鲤(C. carpio chila),其中前三种为洱海特有,进行了线粒体DNA(mtDNA)的限制性片段长度多态性(RFLP)分析,构建了它们的mtDNA限制性内切酶图谱。结果表明,这四种鲤鱼在种内和种间均缺乏mtDNA RFLP。这种现象在鱼类种间的mtDNA的RFLP研究中是罕见的。分析这一现象的原因,可能在于这些物种是同域形成物种,并且其分化时间还相当短。

有机化合物结构解析专家系统研究——空间立体异构体的穷举生成

有机化合物结构解析专家系统的研究一直是计算机化学领域的前沿课题。本文在ESESOC 系统已有的基础上，进行了空间立体异构体的结构穷举生成研究，可以从化合物的二维连接表出发，穷举生成出全部的立体异构体。立体异构体的穷举生成需要满足三个条件：穷举性、非冗余性和有效性。目前本系统对于含 C、N、P、S与Si 等元素由于不对称中心、不对称轴引起的立体异构和几何异构均能进行穷举生成。本系统得到的结果与著名的 DENDRAL 系统和 SEMSMI 系统的结果完全一致。而 DENDRAL 系统已经从理论上证明是正确的。关于效率问题，通过对自同构群算法的改进，本系统的生成速度快于SEMAMI系统（其它系统运行时间未见报道），完全能够满足实验室应用。结构解析系统中环的识别主要是所有环的识别以及SSSR（最小的小最环集合）的识别，通过图论算法的应用，本文对这几类环的识别算法都进行了探讨，并应用于 ESESOC 系统作为约束条件，大大减少了系统候选化合物的数目。芳香性的识别，特别是稠环化合物芳香性的识别，在结构解析专家系统中一直是很难解决的问题，主要是稠环芳香性化合物的共振式比较多，而且在结构解析系统中得到的哪种共振式事先并不能确知，本文对各类常见的芳香性进行了自动识别的研究，并应用于 ESESOC系统中，取得了良好的结果。

分子束外延生长Al掺杂n型ZnS_（1-x）Tex的类DX中心

应用光致发光(PL)、电容-电压(C-V)、深能级瞬态谱(DLTS)和光电导(PC)技术系统研究Al掺杂ZnS_(1-x)Te_x中与Al有关的类DX中心。实验结果表明，ZnS_(1-x)Te_x中存在与Ⅲ－Ⅴ族半导体DX中心相类似的性质。获得与Al有关的类DX中心光离化能E_i(～1.0eV和2.0eV)和发射势垒E_e(0.21eV和0.39eV)，这表明ZnS_(1-x)Te_x大晶格弛豫的出现是由类DX中心引起。

HIRFL设备巡检报警与束流状态显示系统设计

在Visual C++环境下编制了一个用于HIRFL设备自动巡检和报警的应用。通过网络自动读取和显示当前所有受计算控制的设备（电源设备）状态，遇见设备故障时自动发出警报。具有响应用户的中断请求，选择或屏蔽设备，更改设备误差，自动存储故障记录等功能。在Visual C++环境下编制了另一个用于HIRFL束流状态显示的应用软件。通过网络自动读取和分析受计算机控制的束诊设备的参数，并实时显示相应的束流位置或状态。具有直观显示束流当前位置，动态描述束流走向等功能。这两个程序在功能上能够满足HIRFL设备自动巡检和报警以及束流状态显示系统研制的任务书要求。

旱地作物需水量预报决策辅助系统

旱地作物需水量预报决策辅助系统是利用人工智能技术 ,在 Penman公式的基础上结合现有西北旱区的农学知识、模型以及经验进行系统集成而建立的智能化计算机软件系统 ,该系统是西北地区节水农业专家系统的一个子系统。在生产实践中可为陕西关中地区的冬小麦、夏玉米的栽培作出灌溉方案的决策咨询。

人参茎叶挥发油中倍半萜烯化合物的分离与鉴定

对人参茎叶挥发油的有效成分进行分离纯化 ,利用薄层层析 (TL C)、红外光谱 (IR)、气相色谱 (GC)、气相色谱 -质谱 (GC/MS)联机技术从该挥发油中分离鉴定 6个倍半萜烯类化合物 .

稀土与L-组氨酸L-谷氨酸三元配合物的pH电位法研究

报道了在模拟生理条件 ( 37℃ ,c =0 .15mol· L-1Na Cl)下用精密 p H电位法对 15种稀土元素与 L-组氨酸及 L-谷氨酸溶液体系三元配合物稳定常数的测定结果 ,实验数据处理用程序Miniquad- 82 A完成 ,玻璃电极的选择及校正用 Magec程序完成 .结果表明在该三元体系中普遍存在 3种类型的酸式配合物 ( 1111,1112及 1113型 ) ,且每一类型配合物的稳定常数相差较小.

α-iPP的附生结晶研究

用离焦电子显微术及电子衍射技术研究了不同温度下等规立构聚丙烯(α-iPP)超薄膜的细微结构。溶液浇铸的薄膜中的球晶内含有十字交叉和单晶型两种结构,与结晶温度无关。十字交叉结构中复杂的广角片晶支化是由子片晶在母片晶的(010)侧面上附生生长造成的,母子片晶均为侧立放置的链折叠片晶,它们的结晶学c轴位于膜平面内,并成一固定的夹角(100°左右)较低温度结晶时,有大量的多重广角片晶支化;结晶温度越高,支化程度越低。

富碱侵入岩与金成矿关系:云南省姚安金矿床成矿流体形成演化的微量元素和同位素证据

以产在姚安富碱侵入岩体内外接触带上的姚安金矿床为对象,对成矿流体形成演化过程中的微量元素和S、C同位素地球化学进行了综合研究。研究结果表明,富碱侵入岩成岩过程中分异出的岩浆流体提供了姚安金矿床早期成矿作用所必需的成矿流体;从早期成矿阶段至晚期成矿阶段,成矿流体经历了从以岩浆流体为主的流体体系至以大气降水为主的流体体系的转变。因此,钙碱性侵入岩成岩过程中可分异出成矿流体的过程,也存在于富碱侵入岩的成岩过程中。