基于TeO_2旋光特性对声光可调滤波器消色散的设计

该文研究了晶体外的衍射角随入射光波长以及入射光极角的变化趋势,并在考虑晶体的旋光特性的条件下对其进行研究,明确晶体旋光特性对衍射角的具体影响;在考虑晶体旋光特性的情况下,在晶体的出射面添加光楔,有效地消除了由于晶体色散而引起的图像漂移,提高了声光可调滤波器在光谱成像中的成像分辨率;最后对所添加的光楔进行优化设计,达到消除色散的最佳状态.     

Genetic risk and a primary role for cell-mediated immune mechanisms in multiple sclerosis

Multiple sclerosis is a common disease of the central nervous system in which the interplay between inflammatory and neurodegenerative processes typically results in intermittent neurological disturbance followed by progressive accumulation of disability. Epidemiological studies have shown that genetic factors are primarily responsible for the substantially increased frequency of the disease seen in the relatives of affected individuals, and systematic attempts to identify linkage in multiplex families have confirmed that variation within the major histocompatibility complex (MHC) exerts the greatest individual effect on risk. Modestly powered genome-wide association studies (GWAS) have enabled more than 20 additional risk loci to be identified and have shown that multiple variants exerting modest individual effects have a key role in disease susceptibility. Most of the genetic architecture underlying susceptibility to the disease remains to be defined and is anticipated to require the analysis of sample sizes that are beyond the numbers currently available to individual research groups. In a collaborative GWAS involving 9,772 cases of European descent collected by 23 research groups working in 15 different countries, we have replicated almost all of the previously suggested associations and identified at least a further 29 novel susceptibility loci. Within the MHC we have refined the identity of the HLA-DRB1 risk alleles and confirmed that variation in the HLA-A gene underlies the independent protective effect attributable to the class I region. Immunologically relevant genes are significantly overrepresented among those mapping close to the identified loci and particularly implicate T-helper-cell differentiation in the pathogenesis of multiple sclerosis.     

Sb(V)在高岭土表面的吸附:pH、离子强度、竞争性离子与胡敏酸的影响

调查了在不同的pH、离子强度、胡敏酸和竞争性离子存在的条件下Sb(V)在高岭土表面的吸附行为.pH对Sb(V)在高岭土表面的吸附行为影响显著,pH在3~8之间时,随介质pH的升高,Sb(V)的吸附减弱;离子强度、胡敏酸的存在对吸附的影响均不显著;PO43-的存在对Sb(V)在高岭土表面的吸附有明显的抑制作用.     

浅议“三下”采煤技术体系

为进一步提高煤炭资源的回收率，减少矿井储量积压，挖掘生产能力，延长矿井寿命，积极完善、推广“三下”采煤技术体系巳成为矿井挖潜增产的重要技术途径。通过对建筑物下、铁路下、水体下采煤技术体系的介绍，阐述了“三下”开采的重要性及其发展前景。     

吕梁山区马铃薯瓢虫(鞘翅目:瓢虫科)的寄生蜂瓢虫双脊姬小蜂(膜翅目:姬小蜂科)记述

在吕梁山区,瓢虫双脊姬小蜂是马铃薯瓢虫的重要天敌。这种寄生蜂是幼虫一蛹寄生,出自其寄主的干尸蛹体,并有下列特性: 1、广泛分布于遭到马铃薯瓢虫危害的马铃薯田间; 2、最高及最低寄生率分别为72.34%及6.7%,平均约50%; 3、每头寄主的出蜂量,最多及最少,分别为35及6头,平均15.58头; 4、雌雄性比约为2:1—3:1。5、在田间持续寄生,与马铃薯的生长期吻合,并且在吕梁山区至今还没有发现重寄生。     

大学生学习障碍及其对策研究

针对大学生学习中存在的障碍或不适应，用任意抽样调查的方式对本院在校大学生进行了问卷调查，从心理学的角度就大学生学习障碍形成原因进行了分析，并就如何消除障碍从教育教学改革、大学生思想教育、理想教育等6个方面提出了对策。     

低压集中无功补偿的前景探讨

改善企业用电的功率因数(即无功功率补偿)是企业节约电能的重要课题，根据目前变压器运行的状况，提出了采用相应的技术措施以提高功率因数的必要性和可行性，达到节约用电的目的。     

浅谈电子商务技术

随着计算机和互联网的迅速发展与普及使用，电子商务作为一种新型的商务活动方式应运而生。介绍了什么是电子商务，从电子商务的体系结构、优越性、功能和安全控制等5个方面进行了论述。     

Study of Commercial Bank Risk Monitoring Model in Individual Consumption Credit

With the development of individual consumption credit (ICC) in China, commercial banks have been exposed to more and more risks. The loan failure has been an important problem that the banking must face and revolve. This paper develops a factor system to explain how the borrower's risk is affected, and then establishes a risk monitoring model with AHP to pre-warn the banks how much the risk is.     

河津市农业技术推广队伍现状、问题及对策

通过对山西省河津市农业技术推广队伍建设情况的调查分析 ,找出了当前农技推广队伍存在的人员分布结构不合理 ,队伍整体素质不高 ,队伍作用发挥不充分等问题 ,提出了优化队伍结构、提高人员素质和服务水平等具体措施