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Identification of Sewage Monitoring Data Based on mathematical statistics

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Agricultural Science & Technology 2017年第4期18卷 656-659页

作者：万玉山邹涛李大伟温馨沈梦陈艳秋常州大学环境与安全工程学院江苏常州213164

In order to reduce the enormous pressure to environmental monitoring work brought by the false sewage monitoring data, Grubbs method, box plot, t test and other methods are used to make depth analysis to the data, pro... 详细信息

关键词： mathematical statistics Monitoring data Technological process

Potential hydraulic connectivity of coal mine aquifers based on statistical analysis of hydrogeochemistry

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Water Science and Engineering 2022年第4期15卷 285-293页

作者： Xiang Zhao Wei-hua Peng Kai Chen Xin-yi Qiu Lin-hua Sun School of Resources and Civil Engineering Suzhou UniversitySuzhou 234000China School of Earth and Environment Anhui University of Science and TechnologyHuainan 232001China Key Laboratory of Mine Water Resource Utilization of Anhui Higher Education Institutes Suzhou UniversitySuzhou 234000China

Mining activities interfere with the natural groundwater chemical environment,which may lead to hydrogeochemical changes of aquifers and mine water inrush *** study analyzed the hydrochemical compositions of 80 water samples in three aquifers and developed a water source identification model to explore the control factors and potential hydraulic connection of groundwater chemistry in a coal *** results showed that the hydrochemical types of the three aquifers were *** main hydrochemical compositions of the loose-layer,coal-bearing,and limestone aquifers were HCO_(3)·Cl-Na,SO_(4)·HCO_(3)-Na,and SO_(4)-Na·Ca,*** correlation,Unmix,and factor an-alyses showed that the hydrochemical composition of groundwater was controlled by the dissolution of soluble minerals(such as calcite,dolomite,gypsum,and halite)and the weathering of silicate *** factor score plot combined with Q-mode cluster analysis demon-strated no remarkable hydraulic connection among the three aquifers in the study *** water source identification model effectively identified the source of inrush ***,the mixing ratio model rationally quantified the contributions of the three aquifers to inrush water.

关键词： Groundwater Water chemistry Factor analysis Hydraulic connection mathematical statistics

Why SA Can Beat the Exponential Explosion in Heuristic Search

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维普期刊数据库

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Journal of Computer Science & Technology 1990年第3期5卷 259-265页

作者：张钹张铃 Tsinghua University Anqing Teacher's College

In tree (or graph) search,most algorithms mainly use the local heuristic information of each indi- vidual *** in the statistical heuristic search algorithms the global information about subtrees is used effectively so that the computational complexity is greatly *** this paper the problem of how the global information can be extracted from the local one is *** features of SA are also concerned.

关键词： mathematical statistics mathematical Techniques Trees Probability

Rapid Determination of Complete Distribution of Pore and Throat in Tight Oil Sandstone of Triassic Yanchang Formation in Ordos Basin, China

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Acta Geologica Sinica(English Edition) 2020年第3期94卷 822-830页

作者： DU Shuheng SHI Yongmin State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China Oil and Gas Institute Peking UniversityBeijing 100871China

This study aimed to investigate the complete distribution of reservoir space in tight oil sandstone combining casting slices, field emission scanning electron microscopy(FE-SEM), the pore-throat theory model, high-resolution image processing, mathematical statistics, and other technical means. Results of reservoir samples from the Xin’anbian area of Ordos Basin showed that the total pore radius curve of the tight oil sandstone reservoir exhibited a multi-peak distribution, and the peaks appeared to be more focused on the ends of the range. This proved that pores with a radius of 1–50,000 nm provided the most significant storage space for tight oil, indicating that special attention should be paid to this range of the pore size distribution. Meanwhile, the complete throat radius curve of the tight oil sandstone reservoir exhibited a multipeak distribution. However, the peak values were distributed throughout the scales. This confirmed that the throat radius in the tight oil sandstone reservoir was not only in the range of hundreds of nanometers but was also widely distributed in the scale approximately equal to the pore size. The new rapid determination method could provide a precise theoretical basis for the comprehensive evaluation, exploration, and development of a tight oil sandstone reservoir.

关键词： complete distribution tight oil reservoir multi-precision imaging mathematical statistics

NON-LINEAR STOCHASTIC RESPONSE AND ITS EXTREME VALUE OF JACK UP PLATFORMS

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China Ocean Engineering 1989年第3期4卷 271-282页

作者： Nie, Wu Harbin Shipbuilding Engineering Inst China

The non-linear stochastic response of a jack-up platform subjected to wave load has been analyzed dynamically in this paper, and the analysis method in time domain is considered. Monte Carlo simulation is used to generate random sea. An emphasis is placed on the nonlinear hydrodynamic force. Several distributions for the statistical estimation of extreme responses are compared. For Gumble distribution, the parameters of its asymptotic distribution expression have been checked. The results show that the Gumble distribution agrees well with the simulated values of the responses.

关键词： Hydrodynamics Fluid Structure Interaction Marine Platforms Wave Effects mathematical Models mathematical statistics Monte Carlo Methods Structural Analysis Dynamic Response

Applied statistics Using SPSS, STATISTICA, MATLAB and R 2nd ed. 2007

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Application of Digital Analysis Technology in Refractory Petrographic Analysis

2007年

作者： Joaquim P. Marques de Sá

ISBN: (数字)9783540719724

ISBN: (纸本)9783540719717

Four years have passed since the first edition of this book. During this time I have had the opportunity to apply it in classes obtaining feedback from students and inspiration for improvements. I have also benefited from many comments by users of the book. For the present second edition large parts of the book have undergone major revision, although the basic concept – concise but sufficiently rigorous mathematical treatment with emphasis on computer applications to real datasets –, has been retained. The second edition improvements are as follows: • Inclusion of R as an application tool. As a matter of fact, R is a free software product which has nowadays reached a high level of maturity and is being increasingly used by many people as a statistical analysis tool. • Chapter 3 has an added section on bootstrap estimation methods, which have gained a large popularity in practical applications. • A revised explanation and treatment of tree classifiers in Chapter 6 with the inclusion of the QUEST approach. • Several improvements of Chapter 7 (regression), namely: details concerning the meaning and computation of multiple and partial correlation coefficients, with examples; a more thorough treatment and exemplification of the ridge regression topic; more attention dedicated to model evaluation. • Inclusion in the book CD of additional MATLAB functions as well as a set of R functions. • Extra examples and exercises have been added in several chapters. • The bibliography has been revised and new references added.

关键词： mathematical statistics

来源：畅想之星图书光盘版（南... 评论

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畅想之星图书光盘版（南通市图书馆镜像）

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China's Refractories 2014年第3期23卷 1-5页

作者： WANG Jiezeng XIE Jinli Ruitai Materials Technology Co. Ltd. China Building Material Test and Certification Center

Six specimens of fused cast AZS 33#material were taken as samples,and their chemical compositions and physical properties（ initial separating temperature o glass phase,corrosion amount in 24 h,glass phase seepage,and bulk density） were tested; low powered backscattered electron images of the samples（ three for each sample） were taken by a scanning electronic microscope with a reinforced backscattering probe. Then,firstly,the images were processed,and the phase compositions（relative contents of pores,matrix,alumina- zirconia eutectoid and primary baddeleyite） of the samples were obtained by counting. Secondly,the correlation coefficients of all parameters were calculated; indistinctive coefficients and unimportant variables were eliminated by F- test. Thirdly,the roadmap of the parameters was established and explained according to professiona knowledge.

关键词： refractories digital image petrographicanalysis mathematical statistics fused cast AZSmaterial

The Distribution of Multinomial Logit Model with Combined Errors of Perception and Measure

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Systems Science and Systems Engineering 1999年第3期9卷 299-305页

作者： ZHANG Ning\+1\ \ CHENG Liang\|you\+1\ \ H.P.Lo\+2 1.School of Management, Beijing University of Aero. & Astro., Beijing 100083, China 2. Dept. of Management Science, City University of Hong Kong, HK

Logit\|Probit model is investigated as an extra measured error mixed with the user′s utility in multinomial logit model. In the situation, the discrete choice proportion is considered as the conditional probability, the form of multinomial logit and the random variable. The distribution of the conditional probability is derived from the multinormal distribution of the measured error to the distribution of quotient of lognormal random variables. Examples are employed to illustrate its application.

关键词： logit model distribution of logit mathematical statistics

Introduction to the practice of statistics 7th ed.

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