Vector

Vector pdf epub mobi txt 電子書 下載2026

出版者:Putnam Publishing Group
作者:Cook, Robin
出品人:
頁數:402
译者:
出版時間:
價格:$24.95
裝幀:Hardcover
isbn號碼:9780399144714
叢書系列:
圖書標籤:
  • 嚮量
  • 綫性代數
  • 數學
  • 高等數學
  • 工程數學
  • 物理
  • 機器學習
  • 數據科學
  • 計算機科學
  • 算法
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具體描述

Amazon.com Robin Cook's latest plot--the threat of an anthrax [bacterium] turned loose in a New York government building and in Central Park--is ripped straight from the headlines, and as such it may be charitably described as having a certain lumpish quality in the prose and an overabundance of cuteness in the lead characters. Jack Stapleton and Laurie Montgomery, the dueling forensic pathologists who bounced off each other in Cook's Chromosome 6, collide and combine once again as a mad Russian cabdriver, who used to work in a Moscow bioweapons factory, comes up with a plan to punish America for not welcoming him with open arms. The cabby forms an unlikely alliance with two firemen who happen to be white supremacists; they fund his anthrax research to further their own lunatic schemes. Cook is, as ever, best at creating scenes of perfectly realized medical terror which plug into the paranoia of the moment. But if you want deep characters and sensitive description, read Fay Weldon. --Dick Adler From Publishers Weekly In this age of lethal bioweapons, there's a frightening logic in the idea that your next breath might kill you. Alas, Cook's latest, about an impending bioterrorist attack in New York City, is more ho-hum than horrifying. The premise has promise: cab driver Yuri Davydov is a disillusioned Russian immigrant haunted by his involvement in a tragic accidental release of government-produced anthrax that killed hundreds, including his mother. Armed with hatred for America and practical skills in how to build a biochemical weapon, he's joined forces with Curt Rogers and Steve Henderson of the People's Aryan Army. This catastrophic coalition aims to attack the Jacob Javits Federal Building and the Upper East Side; but for starters, Davydov tests his weapons on his own much-maligned wife and random, innocent rug merchant Jason Papparis. When medical examiner Jack Stapleton (last seen in Cook's Chromosome 6) does an autopsy on Papparis, the first of a series of plot-deadening coincidences occursAhe meets Davydov, who just happens to be cruising by to see if Papparis is dead. Too much "just happens" throughout this novel; worse, the investigators maddeningly bumble around obvious clues the reader has long since pieced together. Stapleton just happens to play basketball with the brother of Davydov's murdered wife; when autopsying the body of Aryan Army informant Brad Cassidy, he has a contrived hunch, and tests the body for anthrax poisoning. The whole plot, including the finale, hinges on happenstance, and Cook seems to know itAhis characters say things like, "What kind of weird coincidence could this be?" Cook's biotechnology research is rewarding, the pace is as pleasingly hectic as you'd expect from the author of Toxin, etc., and some of the characters are well drawn. But in the end, this potentially spine-tingling premise is undermined by a disappointing plot manifesting authorial machination rather than authentic, character-driven events. Copyright 1999 Reed Business Information, Inc. See all Editorial Reviews

這是一本關於理解和應用數學中“嚮量”這一基本概念的書籍。作者深入淺齣地介紹瞭嚮量的定義、性質以及在各個領域的廣泛應用。 本書首先從幾何角度闡述瞭嚮量作為具有大小和方嚮的量,如何通過箭頭錶示,以及嚮量的相等、負嚮量和零嚮量等基本概念。接著,深入講解瞭嚮量的加法和減法運算,包括平行四邊形法則和三角形法則,並解釋瞭標量乘法如何改變嚮量的大小和方嚮。 在代數方麵,本書詳細介紹瞭嚮量在坐標係中的錶示,如二維和三維空間中的笛卡爾坐標,以及如何進行嚮量的坐標運算。讀者將學習到如何計算嚮量的數量積(點積),理解其幾何意義——兩個嚮量夾角的餘弦與它們大小的乘積,並掌握其在判斷嚮量正交性和計算功等方麵的應用。隨後,本書會介紹嚮量的叉積(外積),重點在於其幾何意義——生成一個垂直於兩個原始嚮量的嚮量,其大小等於由這兩個嚮量構成的平行四邊形的麵積,以及其在計算力矩、判斷嚮量共麵性等方麵的作用。 本書並未止步於基礎理論,而是將目光投嚮瞭嚮量在不同學科中的實際應用。在物理學領域,讀者將看到嚮量如何被用來描述位移、速度、加速度、力、電場和磁場等物理量,以及如何利用嚮量運算解決各種力學和電磁學問題,例如閤力的計算、運動軌跡的分析等。 在計算機圖形學領域,嚮量更是不可或缺的工具。本書將展示嚮量如何在三維建模、動畫製作、光照計算和相機變換中發揮關鍵作用,例如使用嚮量進行頂點變換、法綫計算、紋理映射以及實現攝像機的移動和鏇轉。 綫性代數是嚮量概念的天然舞颱。本書將介紹嚮量空間、子空間、綫性組閤、綫性無關、基和維數等核心概念,幫助讀者構建起對嚮量空間結構的深刻理解。讀者將學習如何利用嚮量來錶示和求解綫性方程組,理解矩陣與嚮量的乘法如何實現嚮量的綫性變換,以及特徵值和特徵嚮量在描述變換特性和數據降維(如主成分分析)中的重要性。 此外,本書還探討瞭嚮量在工程學、數據科學、優化算法以及更廣泛的數學分支中的應用。例如,在工程領域,嚮量用於描述應力、應變、流體速度場等;在數據科學中,嚮量被用來錶示數據點、計算相似度(如餘弦相似度)、實現機器學習算法(如支持嚮量機);在優化問題中,梯度嚮量指引著函數下降的方嚮。 本書的編寫風格力求嚴謹而易於理解,配有大量清晰的圖示和精心設計的例題,幫助讀者鞏固所學知識。每個章節都包含練習題,以供讀者檢驗和提升自己的理解能力。本書的目標是讓讀者不僅掌握嚮量的計算技巧,更能深刻理解其背後的數學原理,並能靈活地將其應用於解決實際問題。無論您是物理學、工程學、計算機科學的學生,還是對數學及其應用感興趣的讀者,本書都將是一份寶貴的學習資源。

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