The Problem with Problems

本書為配合北京大學信息科學技術學院本科生主幹基礎課、北京市精品課"電路分析原理"課堂教學而編寫，是北京市高校"優質本科教材課件"。可作為高等院校電子類基礎課"電路分析""電路原理""電路基礎"的教材，亦可供相關領域科技人員自學或參考。為使讀者在學習和選擇參考書時減少困惑，本書力圖體現如下特點：理論和知識體系完整，內容闡述簡明生動、更容易理解和掌握。理實交融，例題、思考題、研討題和習題豐富並富有啟發，拓展題取材於科研一線，習題三星分層並附參考答案，方便自學自測。配合雙語教學，章節綱要、名詞術語、例題習題均採用中英雙語，便於留學生使用。This book is written for the undergraduate course "Principles of Circuit Analysis" of the School of EECS in Peking University. It is the "high-quality undergraduate textbook" for colleges and universities in Beijing. The book can be used as the teaching material of electronic-basic courses such as "Circuit Analysis" or "Fundamentals of Electric Circuits". It can also be used for self-study or reference by researchers in related fields.The book includes the following characteristics. First, the theory and knowledge system are complete and easier to understand. Second, the book combines theory with practice. There are many examples, topics, problems, and exercises for discussion and practice. The extended topics are based o

The textbook is designed for the main problems involved in the practice of students in Water Supply and Prainage Science and Engineering, so that students can better practice with questions. The conte

艾德蒙?錢伯斯爵士一九三零年出版的兩卷本《威廉?莎士比亞：事實與問題研究》（William Shakespeare: a Study of Facts and Problems）是莎士比亞研究中的經典巨作，是一部詳盡的文獻彙編。典籍、證據、討論和細微的爭議都包括了進去。本書是英國詩人、劇作家、文學評論家查爾斯?威廉斯參照該書所寫的節本，是為閱讀莎劇和渴望知道有關這位斯特拉福的劇作家情況的讀者寫的。

functions and Hecke L-functions of an imaginary quadratic field，and various problems on elliptic modular forms. As to the values of Dirichlet L-functions， all previous papers and books reiterate a single old result with a single old method. After a review ofelementary Fourier analysis， the author presents completely new results with new methods. though old results will also be proved. No advanced knowledge of number theory is required up to this point. As applications， new formulas for the second factor ofthe class number of a cyclotomic field will be given. The second half of the book assumes familiarity with basic knowledge ofmodular forms. However，all definitions and facts are clearly stated， and precise references are given. The notion ofnearly holomorphic modular forms is introduced and applied to the determination of the critical values of Hecke L-functions of an imaginary quadratic field. Other notable features of the book are： (1) some new results on classical E

What a wonderful world! 多么美好的世界！Remember Dory? She’s a quirky blue tang who has a way of solving problems that’s all her own. With her short-term memory loss, recalling even the simplest things has al

Based on the combination of human development theories with feminist theories, this book has made deep analysis of the problems concerning womens development in contemporary China and put forward real

本書是經典力學領域的經典著作，預備知識要求極低，僅需基礎微積分和本科基礎物理學知識，因此適合本科到研究生入門階段的課程使用，也適合數學、物理和工程專業的學生群體。This is an intuitively motivated presentation ofmany topics in classical mechanics and related areas of control theory and calculus of variations. All topics throughout the book are treated with zero tolerance for unrevealing definitions and for proofs which leave the reader in the dark. Some areas of particular interest are： an extremely short derivation of the ellipticity of planetary orbits; a statement and an explanation of the “tennis racket paradox”; a heuristic explanation (and a rigorous treatment) of the gyroscopic effect; a revealing equivalence between thedynamics of a particle and statics of a spring; a short geometrical explanation of Pontryagin’s Maximum Principle, and more. In the last chapter, aimed at more advanced readers, the Hamiltonian and the momentum are compared to forces in a certain static problem. This gives a palpable physical meaning to some seemingly abstract concepts and theo

This book is compiled according to the requirements of technical skills and theoretical knowledge for the advanced lathe worker in the revised national vocational qualification standard. This book introduces four modules, including machining long lead screw and worm, eccentric parts and multi-throw crankshaft, machining gearbox, and machining assembly, with tasks and subtasks in each module, with regard to the workpiece diagram recognition, processing analysis and calculation of various parts, such as long lead screw, multi-start thread, multi-line worms, double eccentric parts, four-throw crankshaft, gear reducer, worm gear reducer, bevel gears, bisector parts, mold, combined shaft and kit, as well as their clamping and positioning methods, processing methods, dimensional and geometric accuracy test methods, surface quality assurance methods, common quality problems and preventive measures or solutions, etc.This book can be used as a teaching book for mechanical, mechatronics,etc. app

Linear algebra permeates mathematics,perhaps more so than any other single subject.It plays an essential role in pure and applied mathematics,statistics,computer science,and many aspects of physics and engineering.This book conveys in a user-friendly way the basic and advanced techniques of linear algebra from the point of view of a working analyst.The techniques are illustrated by a wide sample of applications and examples that are chosen to highlight the tools of the trade.In short,this is material that many of us wish we had been taught as graduate students.Roughly the first third of the book covers the basic material of a first course in linear algebra.The remaining chapters are devoted to applications drawn from vector calculus,numerical analysis,control theory,complex analysis,convexity and functional analysis.In particular,fixed point theorems,extremal problems,matrix equations,zero location and eigenvalue location problems,and matrices with nonnegative entries are discussed.App

HiGee Chemical Separation Engineering is one of the books in Chemical Industry Press’s Chemical Process Intensification series. The book introduces the basic concepts and technical terms of highgravity (HiGee) separation technology and in a systematic way analyzes and expounds the differences between centrifugal separation technology and high-gravity separation technology. This book takes the “problem elicitation–theory–principle–key technology–application case” as the main theme and details the operation and technical contents of high-gravity chemical separation, such as absorption, desorption, distillation, extraction, and adsorption. Significantly, the book also highlights academic innovation and illustrative examples that are closely combined with practical production.《超重力分離工程》介紹了以強化傳質分離過程速率為目的的超重力分離技術，通過科學構建流體流動、尺度、形態、接觸方式等，極大地提高了傳質分離效率，呈現出設備體積大幅度減小、分離效率提高、成本降低的優勢，開闢了強化傳質分離效率、降低能耗的新

This book provides a comprehensive foundation of machine learning. To answer the questions of what to learn, how to learn, what to get from learning, and how to evaluate, as well as what is meant by learning, the book focuses on the fundamental basics of machine learning, its methodology, theory, algorithms, and evaluations, together with some philosophical thinking on comparison between machine learning and human learning for machinery intelligence.The book is organized as follows: Introduction (Chapter 1), Evaluation (Chapter 2), Supervised learning (Chapters 3, 4, and 5), Unsupervised learning (Chapter 6), Representation learning (Chapter 7), Problem decomposition (Chapter 8), Ensemble learning (Chapter 9), Deep learning (Chapter 10), Application (Chapter 11), and Challenges (Chapter 12).The book can be used as a textbook for college, undergraduate, graduate and PhD students majored in computer science, automation, electronic engineering, communication, ect. It can also be used as

《車輛路徑問題(影印版)》內容簡介：in the field of combinatorial optimization problems, the vehicle routing problem (vrp) is one of the most challenging. defined more than 40 years ago, the problem involves designing

《反問題的計算方法(影印版)》內容簡介：inverse problems arise in a number of important practical applications, ranging from biomedical imaging to seismic prospecting. this book provides the reader with a basic understan