On a dynamic mixture GARCH model

This paper proposes a new mixture GARCH model with a dynamic mixture proportion. The mixture Gaussian distribution of the error can vary from time to time. The Bayesian Information Criterion and the EM algorithm are used to estimate the number of parameters as well as the model parameters and their standard errors. The new model is applied to the S&P500 Index and Hang Seng Index and compared with GARCH models with Gaussian error and Student's t error. The result shows that the IGARCH effect in these index returns could be the result of the mixture of one stationary volatility component with another non‐stationary volatility component. The VaR based on the new model performs better than traditional GARCH‐based VaRs, especially in unstable stock markets. Copyright © 2008 John Wiley & Sons, Ltd.     

矿井瓦斯综合治理技术

针对煤矿瓦斯的特性和发生瓦斯爆炸灾害事故的原因及特点,介绍了预防和控制瓦斯爆炸灾害事故的技术措施,说明瓦斯事故的防治是煤矿安全工作的一项系统工程,必须放在安全工作的首位,才能使瓦斯爆炸事故及其他灾害事故大幅度减少.     

对高校图书馆临时工聘用与素质提升的思考——以湖南工业大学图书馆为例

阐述了高校图书馆招聘临时工的必要性,指出了图书馆临时工聘用中存在的问题,提出了改进图书馆临时工聘用与提升临时工素质的建议.     

新型自动多片锯的设计

针对木材加工现场残留大量不规整小木块、木材综合利用率低的现状,设计一种基于PLC控制的新型自动多片锯,实现非规整木块的自动化锯切生产.新型自动多片锯由自动上料部件、高度检测部件、自动牵引部件、圆锯调整部件等关键部件组成.实际生产表明,新型自动多片锯能自动锯切不规整的小木块,锯切400 mm长单木块的时间少于10 s,可有效提高木材的综合利用率和木材加工的生产效率,降低工人劳动强度,保护工人身体健康.     

浅议"粉骷髅"

粉骷髅是中国历代不同文体作品中一个惯用的意象.将美貌的女性和象征死亡让人畏惧的骷髅相联系,反映了封建社会男性对女色的矛盾心理,它是综合儒释道三教思想的产物,是中国古人一种文化观念的体现.     

建筑设计师完美主义与工作倦怠的关系

为探索完美主义与工作倦怠之间的关系,选取北京某设计院在职建筑设计师203名,用Frost多维完美主义量表、简版应对方式问卷以及工作倦怠量表MBI-GS进行调查,并利用结构方程模型进行分析。结果显示:完美主义的错误在意维度与工作倦怠负相关显著;完美主义秩序维度与工作倦怠正相关显著。回避应对在错误在意和工作倦怠之间起部分中介作用,在高秩序和工作倦怠之间起完全中介作用。建筑设计师完美主义的适应维度与非适应维度不同于其他样本。     

A genome-wide association study in Han Chinese identifies new susceptibility loci for ankylosing spondylitis

To identify susceptibility loci for ankylosing spondylitis, we performed a two-stage genome-wide association study in Han Chinese. In the discovery stage, we analyzed 1,356,350 autosomal SNPs in 1,837 individuals with ankylosing spondylitis and 4,231 controls; in the validation stage, we analyzed 30 suggestive SNPs in an additional 2,100 affected individuals and 3,496 controls. We identified two new susceptibility loci between EDIL3 and HAPLN1 at 5q14.3 (rs4552569; P = 8.77 × 10(-10)) and within ANO6 at 12q12 (rs17095830; P = 1.63 × 10(-8)). We also confirmed previously reported associations in Europeans within the major histocompatibility complex (MHC) region (top SNP, rs13202464; P < 5 × 10(-324)) and at 2p15 (rs10865331; P = 1.98 × 10(-8)). We show that rs13202464 within the MHC region mainly represents the risk effect of HLA-B*27 variants (including HLA-B*2704, HLA-B*2705 and HLA-B*2715) in Chinese. The two newly discovered loci implicate genes related to bone formation and cartilage development, suggesting their potential involvement in the etiology of ankylosing spondylitis.     

规划、建筑与景观相结合——浅谈我国景观设计的发展趋势

随着生活水平的逐步提高,景观设计越来越受到人们的重视。但在我国,对景观设计的理解存在着偏差,景观设计处于规划与建筑设计的陪衬地位。景观设计对城市规划和建筑设计有直接的影响,规划、建筑与景观的紧密结合是景观设计的发展趋势。     

关于促进煤炭化工能源自主专利成果产业化的研究

通过对山西省煤炭能源产业现状的调查与分析和煤炭深加工专利技术的研究,提出促进煤层气开发专利技术、煤气化专利技术、煤制油专利技术等5项技术产业化的对策,以加快山西省核心技术的研发,促进山西省相关产业的形成和发展.     

移动图书馆在高职院校应用的探索

在解释移动图书馆概念的基础上,介绍了移动图书馆的兴起背景和国内外发展现状,分析了高职院校图书馆进行移动图书馆建设的策略,指出移动图书馆建设必将推动高职院校图书馆的数字化进程。