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Search Results: 1 - 10 of 66624 matches for " 武杰 "
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野外工程地质钻探取样方法差异比较
Comparison of the Differences between Field Engineering Geological Drilling Field Sampling Methods
 [PDF]


Advances in Geosciences (AG) , 2014, DOI: 10.12677/AG.2014.44029
Abstract:
本文阐述了工程地质勘察钻探取样方法是地质环境勘察的关键环节。全面对比了勘察钻孔结构设计,钻进方法选择、钻探技术及操作方法和钻进工艺的差异性,详尽分析钻进方法、技术和工艺的优劣,最大程度地简化优化钻孔结构,以提高钻进效率和降低钻探成本。为地质环境勘察、水文地质调查、矿产资源勘查等地质调查取岩芯样,获得基础参数,提供了重要的取样方法理论依据。
This paper describes that the engineering geological exploration drilling sampling method is the key in the reconnaissance of geological environment. Differences of the survey and drilling structural design, drilling method selection, drilling techniques and methods of operation and drilling technology are comprehensively compared, and drilling methods, techniques and technology advantages and disadvantages are analysed in detail. The drilling structure is optimized to improve drilling efficiency and reduce drilling costs. This paper provides an important theoretical basis for the sampling method in order to get coring samples for geological environment survey, hydrogeological investigations, and other mineral resources exploration, and to obtain basic para- meters.
简述滴灌产业发展现状及建议
Description of the Present Situation and Suggestion of Drip-Irrigation Industry Development
 [PDF]


World Journal of Forestry (WJF) , 2015, DOI: 10.12677/WJF.2015.41003
Abstract:
滴灌技术已在农业、林业、城市绿化等上广泛应用。本文结合自己的推广应用的经验和体会简述了国内外滴灌产业发展现状及存在的问题,提出了滴灌产业持续发展的建议:1) 加大滴灌节水扶持力度,提高滴灌节水灌溉机械化、现代化技术;2) 制定措施鼓励推广国产节水器材;3) 对我省滴灌节水新产品设备的购买和销售实行补贴;4) 制定鼓励我省节水灌溉企业集团化、资本化发展的优惠政策,增强滴灌在国际市场的竞争实力。
The drip-irrigation technology has been applied widely in agriculture, forestry and urban greening. In the present paper, the present developmental situation and the existing problems of drip- irrigation industry were discussed, and the suggestions of this industry sustainable development were put according to our experience and understanding. The suggestions were: 1) Increasing the support for development of drip-irrigation saving water technology and improving the mechani-zation as well as modern technology; 2) Making measures for encouraging the domestic water saving equipment extension; 3) Giving the financial support for purchasing and selling the new products and equipments of drip-irrigation produced in our province; 4) Making the favourable policy for encouraging the collectivization and capitalization development of the water saving ir-rigation production companies in our province so as to strengthen the competition ability of our drip-irrigation industry in international market.
股票预报的因子分析模型探究
Research on the Factor Analysis Model of Stock Forecasting
 [PDF]

, 崔栋利
Statistics and Applications (SA) , 2016, DOI: 10.12677/SA.2016.54034
Abstract: 本文选取了16个主要财务指标来研究23家上市企业的财政状况,对其发行的股票进行评价与预报。由于各个财务指标之间存在一定的相关性,容易造成信息的重复,因此我们采用因子分析方法提取合适的公共因子,以便对企业的财政状况进行解释。结果表明,因子分析方法可以将股票预报问题简单化,能够对企业的股票和财政状况有一个清晰的认识,进而使企业的股票和财政状况的分析更加便捷。
This paper selects 16 major financial indicators to study the financial situation of 23 listed companies, the evaluation and forecast of the stocks issued by the listed companies. Since there is a certain correlation between the various financial indicators, it is easy to cause information duplication, so we use the factor analysis method to extract the appropriate public factors in order to explain the financial situation of enterprises. The results show that the factor analysis method can simplify the stock forecast problem, and it can make a clear understanding of the stock and financial status of the enterprise, and then makes the analysis of the stock and financial situation more convenient.
基于聚类分析的社会保险收支情况研究
Research on Social Insurance Income and Expenditure Based on Cluster Analysis
 [PDF]

, 曲崇静
Statistics and Applications (SA) , 2016, DOI: 10.12677/SA.2016.54035
Abstract: 为分析烟台市社会保险基金收支增幅情况,采用对比分析法和多元统计分析中的聚类分析法,对烟台市2015年,2016年上半年社会保险基金的收入和支出增减情况进行分析和综合评价。结果表明,受宏观经济和人口老龄化的影响,全市社会保险基金增收的压力较大,医疗保险基金支出增长水平较高。
In order to analyze the income and expenditure of social insurance fund of Yantai city, comparative analysis and cluster analysis of multivariate statistical analysis were used to analyze and evaluate the income and expenditure of the social insurance fund of Yantai city in the first half of 2015 and 2016. The results show that, under the influence of the macro economy and the aging of the population, the social insurance fund of the city is under increasing pressure, and the expenditure level of the medical insurance fund is high.
对弱智儿童的检测研究

心里发展与教育 , 1988,
Abstract: 相当长的一段时期,国外在鉴别弱智儿童时所采用的方法大都是利用斯坦福比内量表和威克斯勒量表求得儿童智商数作出判断的.然而,这种“标准”的可靠性不仅是苏联,就连西方国家也一刻也没有停止过对它的批判.仅仅依靠智力量表测得儿童智商且以智商来判断儿童是否属弱智的做法至少有三点明显无法克服的不足之处:第一,它完全忽略了弱智儿童的基本概念.
海水中放射性铯快速测量方法研究
Study on Fast Measurement of Radioactive Cesium in Seawater
 [PDF]

马嫱,, 蔡继
Adances in Marine Sciences (AMS) , 2016, DOI: 10.12677/AMS.2016.33010
Abstract:
海水中放射性铯的活度浓度必须通过吸附浓缩后才可以测量,缩短吸附浓缩技术的时间是提高采样时空分辨率的关键因素。课题组于2014年7月和11月对厦门近岸水体进行调查,分别利用实验室沉淀法和现场快速富集法分别对所调查海域水样中的放射性Cs-137进行测量,并针对体积对结果误差及方法探测限的影响进行研究。结果表明,两种方法得到的结果在同一数量级水平,2014年7月航次二者的一致率为66.7%,2014年11月航次二者的一致率为46.7%。体积在1000 L以内时,数据结果的误差和方法探测限均随体积增大而明显减小,综合考虑,现场快速富集法中过滤海水体积应不小于1000 L。
The activity concentration of radioactive cesium in seawater must be measured by adsorption concentration, and the time to shorten the concentration of adsorption is the key factor to improve the spatial and temporal resolution of sampling. Research group surveyed the coastal waters of Xiamen in July and November 2014, using the precipitation method and the on-site rapid enrichment method respectively for the measurement of radioactive Cs-137 in sea water samples, and aimed at the volume, the results error and method detection limits were investigated. The results show that the results obtained by the two methods were at the same magnitude level, the consistent rate being 66.7% in the July 2014 voyage and 46.7% in November 2014. When the volume is less than 1000 L, the error of the data and the detection limit of the method are obviously decreased with the increase of the volume, so that the volume of filtered seawater should not be less than 1000 L using the on-site rapid enrichment method.
极大子群同阶类类数不大于2的有限群

科学通报 , 1987,
Abstract: S.Adnan曾证明如下定理: 设G是有限群,G中极大子群的共轭类类数为2,则G可解。 我们将极大子群共轭类推广到同构类,
交错群的一个新刻划

科学通报 , 1989,
Abstract: T.Oyama曾证明如下结论:若有限群G与交错群A_n有相同的特征表,则~~
散在单群的一个新刻划

科学通报 , 1988,
Abstract: 对于饶有趣味的散在单群存在着各种不同的刻划。本文继续以前的工作,仅用群G的元的阶之集π_e(G)和|G|对26个散在单群给出形式统一的刻划。我们证明了如下定理: 定理 设G是群,H是散在单群,则G≌H的充要条件是:
有限单群的一个刻划

科学通报 , 1990,
Abstract: 在文献1]的基础上,仅用元的阶之集我们又刻划了一批有限单群,即证明了下述定理: 定理 设G是有限群,H为下述有限单群之一:A_(11);PSU(6,2);S_z(2~(2m+1)),m≥1;M_(12),J_3,HS,McL,Suz,Ru,O'N,Co_2和Co_3.则G同构于H当且仅当π(G)=π_e(H),其中π(G)表示G中元的
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