THE IMPORTANCE OF MATHEMATICS

数学的重要性 近些年来，数学这位科学的女王的重要性遭到了人们的怀疑，人们倾向于将数学分为有用的和没用的。认为那些过于抽象的研究就属于“误用的数学”。本为是W. T. Gowers，一位菲尔兹奖获得者，在巴黎的千年数学大会上的讲稿，阐述了那些便宜的数学研究对人类带来的深远影响。

The Importance of Reading Literature

  As is shown in the picture, when the teacher assigns her student to read a literature book, she tells him to think of it as a long text-message. ∕It reminds me of the importance of reading literature while most people are spending much time reading text-message than literary works.

The Basics of Crystallography and Diffraction

This book provides a clear introduction to topics which are essential to students in a wide range of scientific disciplines but which are otherwise only covered in speed and mathematically detailed texts. It shows how crystal structures may be built up from simple ideas of atomic packing and co-ordi

The Importance of the Right Technique.pdf

The Importance of the Right Technique.pdf

Practical Guide to the Packaging of Electronics, Second Edition

There are four topics that I categorize under packaging and enclosure design and analysis. These are electromagnetic, thermal, mechanical, and thermomechanical analyses. We do not cover electromagnetics here; however, its importance cannot be overstated. Unfortunately, much of the analysis for electromagnetic interference (EMI) or electromagnetic compatibility (EMC) is done as an after event. Testing is done once the system is developed and often coupling and interactions are ignored. EMI is difficult to calculate exactly; however, back-of-the-envelope estimates may be developed to ensure higher end-product compliance. Thermal analysis is concerned with calculating the component-critical temperatures. Mechanical analysis is concerned with the housing of the electronics (from component housing to PCB to enclosure and finally to the rack) as well as the ability of this housing to maintain its integrity under various loading conditions such as shock and vibration. Thermomechanical management is concerned with the impact of thermal loads on the mechanical behavior of the system. In this work, we set the foundation for thermal and mechanical analyses of electronics packaging/enclosure design.

The Importance of Living 林语堂 生活的艺术

生活的艺术英文版，txt文档可以当电子书来用，很方便

The Theory and Practice of Investment Management

The Second Edition of The Theory and Practice of Investment Management is the ultimate guide to understanding the various theoretical and practical aspects of investment management as well as the essential vehicles held in investment portfolios. Created with both practitioners and students in mind, this reliable resource ties together theoretical advances in investment management with actual applications—and prepares you to use proven investment management techniques to control risk while enhancing performance. Led by financial experts Frank Fabozzi and Harry Markowitz, the contributors to this book—successful practitioners with hands-on expertise as well as application-oriented academics—combine their real-world financial knowledge with investment management theory to provide the practical guidance you need to succeed. Divided into three informative parts—with key points and challenging questions found in each chapter—this edition of The Theory and Practice of Investment Management contains insights on every aspect of the investment management process, addressing: Asset allocation and portfolio construction Equity analysis and equity portfolio management strategies—with discussions of common stock valuation, long-short equity portfolios, equity derivatives, and more Bond analysis and bond portfolio management strategies—with coverage of asset-backed and mortgage-backed securities, yield measures, multifactor risk models, interest rate derivatives, and more Many finance books focus on the theory of investment management and leave the details of the implementation up to you. This edition of The Theory and Practice of Investment Management takes a more comprehensive approach to this discipline by illustrating how theory is applied in practice while also stressing the importance of the portfolio construction process. From the Back Cover In the challenging post–financial crisis environment, investment managers require an understanding of a multitude of different issues, from how investment objectives are determined to the best way to construct a portfolio given an investment strategy. The Second Edition of The Theory and Practice of Investment Management recognizes these needs and addresses them with innovative insights from some of the most respected experts in the field of investment management. Led by financial experts Frank Fabozzi and Harry Markowitz, the contributors to this book—successful practitioners with hands-on expertise—combine real-world financial knowledge with investment management theory to provide you with the practical guidance needed to succeed within today's investment management arena. Divided into three comprehensive parts—(I) Instruments, Asset Allocation, Portfolio Selection, and Asset Pricing; (II) Equity Analysis and Portfolio Management; (III) Bond Analysis and Portfolio Management—this comprehensive investment management resource offers valuable insights and analysis of all pertinent investment products while exploring a wide range of investment strategies. Engaging and informative, the Second Edition of The Theory and Practice of Investment Management skillfully covers some of the most important aspects of this discipline along with the investment vehicles associated with it. Essential reading for practitioners and students alike, this valuable guide—which contains key points and challenging questions in each chapter—will help you use proven investment management techniques to protect and grow a portfolio within today's dynamic financial environment.

Vector Control of Three-Phase AC Machines: System Development in the Practice

Springer | 2008-06-19 | ISBN: 3540790284 | 340 pages http://www.amazon.com List Price: $139.00 三相电机矢量控制技术书籍类最新版-2008, 源自德国的英文版, 亚马逊:售价 139美元 * Covers electrical drive technology * Extended, English version of successful German textbook * Ideal for use in both industry and the

Programming 101: The How and Why of Programming 2018

Understand the importance of programming, even if you’ve never programmed before! This book will teach you the basics of programming using the Processing programming language. You will create your own Processing sketches, using personal images, themes, or hobbies that you enjoy. The chapters in the book will demonstrate the process of programming, starting with formulating an idea, planning, building on past projects, and refining the work, similar to writing an essay or composing a song. This approach will guide you to make use of logic and mathematics to produce beautiful effects. The term for program in Processing is sketch, though the sketches featured in this book are far more than static drawings; they incorporate interaction, animation, video, audio, and accessing files on the local computer and on the Web. Technical features are introduced and explained in the context of complete examples: games (Snake, Hangman, jigsaw, slingshot), making a collage of family images and video clips, preparing directions for folding an origami model, rotating objects in 3D, and others. Programming is a fun, creative, expressive pursuit. It requires attention to details and can be frustrating, but there is very little that compares to the satisfaction of building a program out of nothing and making it work (or taking an existing program and fixing a problem, or adding a feature and making it better). Programming 101 is your gateway to making this happen. What You Will Learn Gain basic programming skills Build fun and creative programs Use files for making a holiday card Combine videos, images, and graphics in a Processing sketch Who This Book Is For Anyone who has been thinking about trying programming, or has tried, but needs more motivation; anyone who wants to learn about the Processing language.

Highlighting the importance of big data management and analysis for various app

This book addresses the impacts of various types of services such as infrastructure, platforms, software, and business processes that cloud computing and Big Data have introduced into business. Featuring chapters which discuss effective and efficient approaches in dealing with the inherent complexity and increasing demands in data science, a variety of application domains are covered. Various case studies by data management and analysis experts are presented in these chapters. Covered applications include banking, social networks, bioinformatics, healthcare, transportation and criminology. Highlighting the Importance of Big Data Management and Analysis for Various Applications will provide the reader with an understanding of how data management and analysis are adapted to these applications. This book will appeal to researchers and professionals in the field. . Read more... Abstract: This book addresses the impacts of various types of services such as infrastructure, platforms, software, and business processes that cloud computing and Big Data have introduced into business. Read more...

SQLSERVER技巧集锦

SQLSERVER技巧集锦 提供各种常用的SQLSERVER小技巧

PRACTICAL ELECTRICAL NETWORK AUTOMATION AND COMMUNICATION SYSTEMS

By Cobus Strauss, CPEng BSc (ElecEng), Bcomm, SKM Engineers, Perth, Australia Description In the past automation of the power network was a very specialized area but recently due to deregulation and privatization the area has become of a great importance because companies require more information and communication to minimize costs, reduce workforce and minimize errors in order to make a profit. Audience Electrical power engineering professionals (transmission and distribution); communications engineers working in the electricity generation and distribution sector. Electrical and mechanical engineers and technicians wishing to understand the essentials of industrial data communications in the electricity transmission and distribution business. Contents Introduction to Power System Automation; Historical Development of Power System Automation; Overview of Power Networks; Fundamentals of Electrical Protection; Remote Substation Access and Local Intelligence; Data Communications; Communication Protocols; SCADA Systems; Communications in Power System Automation; Power System Automation Architectures; Power System Automation Systems on the Market; Practical Considerations; The Internet.

Bias in random forest variable importance measures

This thesis proposes to employ an alternative random forest method, the variable importance measure of which can be employed to reliably select relevant predictor variables in any data set. The performance of this method is compared to that of the original random forest method in simulation studies, and is illustrated by an application to the prediction of C-to-U edited sites in plant mitochondrial RNA, re-analyzing the data of that were previously analyzed with the original random forest method.

compensation and the importance of site-specific considerations

Predicting fish population dynamics compensation and the importance of site-specific considerations

Practical.ELK.Stack.1484226259.pdf

Practical ELK Stack: Build Actionable Insights and Business Metrics Using the Combined Power of Elasticsearch, Logstash, and Kibana Use the ELK (Elasticsearch, Logstash, and Kibana) stack to build systems that provide actionable insights and business metrics from data sources, including creating amazing visualizations and dashboards. Learn how to set up the ELK stack, build a data pipeline, and create customized plugins. Practical ELK Stack will teach you to configure the software, install tools, and build a data pipeline. You will learn the key features of Logstash and its role in the ELK stack, including creating Logstash plugins, which will enable you to use your own customized plugins. The importance of Elasticsearch and Kibana in the ELK stack is covered, along with various types of advanced data analysis, including charts, tables, and maps. The simple and powerful nature of ELK stack has contributed to its quick adoption. Diverse scenarios are covered, ranging from social media analysis to grid monitoring at CERN. You will see how ELK stack is being used at companies such as Facebook, Github, and Netflix. With this book you will learn The need for log analytics, and current challenges How to perform real-time data analytics on streaming data, and turn them into actionable insights How to create indexing and delete data The different components of ELK (Elasticsearch, Logstash, and Kibana) stack Shipping, Filtering, and Parsing Events with Logstash How to build amazing visualizations and dashboards using Data Discovery, Visualization, and Dashboard with Kibana Who this book is for This book is for developers or DevOps Engineers interested in building systems that provide amazing insights and business metrics out of different data sources using the ELK stack. Table of Contents Chapter 1: Introduction to the ELK Stack Chapter 2: Shipping, Filtering, and Parsing Events with Logstash Chapter 3: Extending Logstash Chapter 4: Creating, Indexing, and Deleting Data Chapter 5: Searching Data Chapter 6: Mapping and Analysis Chapter 7: Data Exploration with Aggregates Chapter 8: Exploring Kibana Chapter 9: Kibana - Data Visualization Chapter 10: The Kibana Dashboard Chapter 11: Designing for Scale Chapter 12: The ELK Stack in Production Chapter 13: Real-Life Stories

Graph Algorithms: Practical Examples in Apache Spark and Neo4j

Graph Algorithms: Practical Examples in Apache Spark and Neo4j By 作者: Mark Needham – Amy E. Hodler ISBN-10 书号: 1492047686 ISBN-13 书号: 9781492047681 Edition 版本: 1 出版日期: 2019-01-04 pages 页数: (217) Discover how graph algorithms can help you leverage the relationships within your data to develop more intelligent solutions and enhance your machine learning models. You’ll learn how graph analytics are uniquely suited to unfold complex structures and reveal difficult-to-find patterns lurking in your data. Whether you are trying to build dynamic network models or forecast real-world behavior, this book illustrates how graph algorithms deliver value—from finding vulnerabilities and bottlenecks to detecting communities and improving machine learning predictions. This practical book walks you through hands-on examples of how to use graph algorithms in Apache Spark and Neo4j—two of the most common choices for graph analytics. Also included: sample code and tips for over 20 practical graph algorithms that cover optimal pathfinding, importance through centrality, and community detection. Learn how graph analytics vary from conventional statistical analysis Understand how classic graph algorithms work, and how they are applied Get guidance on which algorithms to use for different types of questions Explore algorithm examples with working code and sample datasets from Spark and Neo4j See how connected feature extraction can increase machine learning accuracy and precision Walk through creating an ML workflow for link prediction combining Neo4j and Spark

Fundamentals of Computational Neuroscience 2nd.pdf

Computational neuroscience is the theoretical study of the brain to uncover the principles and mechanisms that guide the development, organization, information processing, and mental functions of the nervous system. Although not a new area, it is only recently that enough knowledge has been gathered to establish computational neuroscience as a scientific discipline in its own right. Given the complexity of the field, and its increasing importance in progressing our understanding of how the brain works, there has long been a need for an introductory text on what is often assumed to be an impenetrable topic. The new edition of Fundamentals of Computational Neuroscience build on the success and strengths of the first edition. It introduces the theoretical foundations of neuroscience with a focus on the nature of information processing in the brain. The book covers the introduction and motivation of simplified models of neurons that are suitable for exploring information processing in large brain-like networks. Additionally, it introduces several fundamental network architectures and discusses their relevance for information processing in the brain, giving some examples of models of higher-order cognitive functions to demonstrate the advanced insight that can be gained with such studies. Each chapter starts by introducing its topic with experimental facts and conceptual questions related to the study of brain function. An additional feature is the inclusion of simple Matlab programs that can be used to explore many of the mechanisms explained in the book. An accompanying webpage includes programs for download. The book will be the essential text for anyone in the brain sciences who wants to get to grips with this topic.

Propagation of Sound in Porous Media

In the first edition, models initially developed to describe wave propagation in porous media saturated by heavy fluids are used to predict the acoustical performances of air saturated sound absorbing porous media. In this expanded and revised edition, we have retained, with slight modifications, most of the basic material of the first edition and expanded it by revisiting several original topics and adding new topics to integrate recent developments in the domain of wave propagation in porous media and practical numerical prediction methods that are widley used by researchers and engineers. Chapters 1 to 3 dealing with sound propagation in solids and fluid and Chapter 9 dealing with the modelling of perforated facings were slightly modified. Chapters 4 to 6 were greatly revisited. A more detailed description of sound propagation in cylindrical pores is presented (Chapter 4), related to the more general presentation of new parameters and new models for sound propagation in rigid-framed porous media (Chapter 5). Also in Chapter 5 a short presentation of homogenization, with some results concerning double porosity media, is added. In Chapter 6, different formulations of the Biot theory for poroelastic media are given, with a simplified version for the case of media with a limp frame. In Chapter 11 we have revisited the original representation of the modelling of layered media (Chapter 7 of the first edition) and extended it to cover the systematic modelling of layered media using the Transfer Matrix Method (TMM). In particular, a step by step presentation of the numerical implementation of the method is given with several application examples. Major additions include five new chapters. Chapter 7 discusses the acoustic field created by a point source above a rigid framed porous layer, with recent advances concerning the poles of the reflection coefficient and the reflected field at grazing incidence. Chapter 8 is concerned by the poroelastic layers excited by a point source in air or by a localized stress source on the free face of the layer, with a description of the Rayleigh waves and the resonances. Axisymmetrical poroelastic media are studied in Chapter 10. In Chapter 12, complements to the transfer matrix method are given. They concern mainly the effect of the finite lateral extend, and the excitation by point loads, of sound pack- ages. Several examples illustrating the practical importance of these extensions are given (e.g. size effects on the random incidence absorption and transmission loss of porous media; airborne vs. structure borne insertion loss of sound packages). In Chapter 13, an introduction to the finite element modelling of poroelastic media is presented. Emphasis is put on the use of the mixed displacement-pressure formulation of the Biot theory, xiv PREFACE TO THE SECOND EDITION which appears in the Appendix of Chap. 6. Detailed description of coupling conditions between various domains including a waveguide are presented together with sections on the breakdown of the power dissipation mechanisms within a porous media and radiation conditions. Several applications are chosen to illustrate the practical use of the presented methods including modelling of double porosity materials and smart foams. As in the first edition, the goal of the book remains to provide in a concrete manner a physical basis, as simple as possible, and the developments, analytical calculations and numerical methods, that will be useful in different fields where sound absorption and transmission and vibration damping by air saturated porous media are concerned.