河南省学生定向运动员短距离赛技术数据比较——以2015年全国学生定向越野锦标赛为例

选取参加2015年全国学生定向越野锦标赛的部分河南省和国家级优秀定向运动员为研究对象,对高中组短距离项目比赛成绩和技术数据进行了统计分析和比较研究.结果表明:河南省定向运动短距离赛事项目运动员和国家级运动员相比整体专业运动水平差距明显,主要表现在:山地复杂环境下读图能力差、图地对照和路线选择等专项技术水平较低等方面.一定程度上暴露出河南省学生在定向运动员的招生、管理、训练以及比赛等软硬件建设上的诸多弊端.建议加强运动员专项技术系统训练,积极参加高水平定向赛事,注重赛事总结,积累经验,切实提高定向运动整体水平.     

不同抗性淀粉含量的小麦品种(系)SBEⅡa基因启动子序列分析

为了从分子水平上揭示不同小麦品种(系)间抗性淀粉含量差异的原因,本试验利用q RT-PCR技术研究了抗性淀粉含量高和抗性淀粉含量低的小麦品种(系)淀粉合成关键基因SBEⅡa表达差异。根据Genebank中公布的小麦SBEⅡa基因启动子(AY357072.1)基因序列设计特异性引物,利用RT-PCR技术克隆SBEⅡa基因启动子,利用Clustal.W对测序结果比对分析,利用数据库PLACE和Plant CARE对启动子序列中各特征元件进行预测,以发掘影响SBEⅡa基因表达量的重要作用元件的等位变异位点。结果显示:抗性淀粉含量高的小麦品种(系)中SBEⅡa基因的表达量低于抗性淀粉含量低的品种(系)。克隆了10个抗性淀粉含量不同的小麦品种(系)SBEⅡa基因编码区上游2896 bp序列,10个小麦品种(系)SBEⅡa基因启动子序列相似性达到了99.92%,抗性淀粉含量高和抗性淀粉含量低的小麦品种(系)SBEⅡa基因启动子序列间无规律性差异。推测,SBEⅡa基因启动子可能不是造成SBEⅡa基因表达差异的主要原因。     

区域构造应力场对煤与瓦斯突出影响的数值模拟分析

依据地质动力区划方法，对鹤壁八矿进行Ⅰ～Ⅴ级活动断裂划分，确定了区域构造的特征。分析了煤层的顶板岩性和构造断裂特点，并在此基础上建立了构造应力计算模型。结合对矿区地应力测量和岩体应力状态分析，确定了岩体应力状态的分布规律。通过对结果的分析，认为区域构造应力场控制鹤壁八矿地应力的分布状态，从而决定煤与瓦斯突出呈区域性分布。确定了易发生煤与瓦斯突出的应力升高区的位置，为开采煤层时何时何地采取防突措施提供了科学依据。     

Genome-wide association study identifies loci influencing concentrations of liver enzymes in plasma

Concentrations of liver enzymes in plasma are widely used as indicators of liver disease. We carried out a genome-wide association study in 61,089 individuals, identifying 42 loci associated with concentrations of liver enzymes in plasma, of which 32 are new associations (P = 10(-8) to P = 10(-190)). We used functional genomic approaches including metabonomic profiling and gene expression analyses to identify probable candidate genes at these regions. We identified 69 candidate genes, including genes involved in biliary transport (ATP8B1 and ABCB11), glucose, carbohydrate and lipid metabolism (FADS1, FADS2, GCKR, JMJD1C, HNF1A, MLXIPL, PNPLA3, PPP1R3B, SLC2A2 and TRIB1), glycoprotein biosynthesis and cell surface glycobiology (ABO, ASGR1, FUT2, GPLD1 and ST3GAL4), inflammation and immunity (CD276, CDH6, GCKR, HNF1A, HPR, ITGA1, RORA and STAT4) and glutathione metabolism (GSTT1, GSTT2 and GGT), as well as several genes of uncertain or unknown function (including ABHD12, EFHD1, EFNA1, EPHA2, MICAL3 and ZNF827). Our results provide new insight into genetic mechanisms and pathways influencing markers of liver function.     

钻孔灌注桩灌注施工事故预防及处理

水下灌注桩属于隐蔽工程,影响灌注桩质量的因素很多.结合钻孔桩灌注的施工实践经验,例举了钻孔桩灌注施工中的常见事故,分析了各种事故出现的原因,并介绍了预防及处理措施.     

Delay-dependent decentralized H∞ filtering for uncertain interconnected systems

This article considers delay dependent decentralized H∞ filtering for a class of uncertain intercon nected systems,where the uncertainties are assumed to be time varying and satisfy the norm-bounded conditions.First,combining the Lyapunov-Krasovskii functional approach and the delay integral inequality of matrices,a sufficient condition of the existence of the robust decentralized H∞ filter is derived,which makes the error systems asymptotically stable and satisfies the H∞ norm of the transfer function from noise input to error output less than the specified up-bound on the basis of the form of uncertainties.Then,the above sufficient condition is transformed to a system of easily solvable LMIs via a series of equivalent transformation.Finally,the numerical simulation shows the efficiency of the main results.     

A Decision Support System for Construction Projects Based on Standardized Exchanged Documents

Large amounts of documents are exchanged during the construction phase of projects, which covers the important management information. To utilize the exchanged documents to support decisionmaking of the management staffs, the requirement analysis was carried out based on the interviews to the practitioners. A decision support system called Explyzer+ was developed based on the previous prototype system Explyzer. The latter was enhanced by adding the functions to automate the whole process and the techniques of data mining including decision tree analysis and clustering analysis. A case study for in-depth information analysis was conducted based on the data obtained from a large construction project to demonstrate its feasibility and effectiveness. The system could effectively assist the management staffs to carry out in-depth information analysis for decision-making in construction projects.     

分散过程控制是选矿技术发展新的生长点

选矿过程控制具有系统复杂、设备分散、环境恶劣、原料变动四大特性,采用传统DCS控制系统将面临着投资大、精度差、维护多、改造难的四大制约因素.随着控制技术,计算机技术和通信技术的飞速发展,如何充分发挥分散过程控制系统FCS的优点,结合智能控制和模糊控制技术,建立现场总线控制网络,将是选矿过程控制技术一个值得关注的发展方向.     

鸡蛋壳制取硫酸钙生产工艺研究

本文报导了以废物鸡蛋壳为原料用盐酸浸溶,然后加硫酸制取硫酸钙的方法,采用L_3（3~4）正交实验,获得了从鸡蛋壳制取硫酸钙的最佳条件,其工艺简单,产品质量稳定,为废物的综合利用开辟了一条新途径。     

Asymptotic Analysis of Estimated Cyclic Cross-Correlation Function Between Stationary and Cyclostationary Processes

The cyclic cross-correlation between a stationary process and a cyclostationary process at cycle frequency α(≠ 0)is identically zero under an ideal condition, which indicates that a cyclic cross-correlation method performs much better than the conventional cross-correlation method in suppressing the stationary noise or interference. But unfortunately, the cyclic cross-correlation will not really approach zero due to the limited data length in some real conditions. In this paper,