结果:找到“quant trading”相关内容101个,排序为按回复时间降序,搜索更多相关帖子请点击“高级
Inside the black box: a simple guide to quantitative and high-frequency trading
32 个回复 - 5847 次查看 New edition of book that demystifies quant and algo tradingIn this updated edition of his bestselling book, Rishi K Narang offers in a straightforward, nontechnical style—supplemented by real-world e ...2015-5-10 22:46 - 大家开心 - 投资人(实务版)
Inside the Black Box: A Simple Guide to Quantitative and High Frequency Trading
3 个回复 - 1973 次查看 书名: Inside the Black Box: A Simple Guide to Quantitative and High Frequency Trading 2nd Edition 作者: Rishi K. Narang 出版日期: 2013 出版: Wiley 页数: 337 语言: 英语2019-1-25 19:08 - zhangke0987 - 投资人(实务版)
英文原版(免费啦)Pairs Trading - Quantitative Methods and Analysis
115 个回复 - 29855 次查看 很不错的英文原版数量化交易 共享啦 Pairs trading is a market neutral strategy in its most simple form. The strategy involves being long (or bullish) one asset and short (or bearish) another. If pro ...2009-10-30 14:07 - chqsdu - 金融学(理论版)
Quantitative Trading (True PDF)
11 个回复 - 4966 次查看 书名: Quantitative Trading: Algorithms, Analytics, Data, Models, Optimization (True PDF) 作者: Xin Guo, Tze Leung Lai, Howard Shek & Samuel Po-Shing Wong 出版日期: 2017 出版: CRC Press 页数: 374 ...2019-1-18 10:04 - zhangke0987 - 投资人(实务版)
【独家发布】Finding Alphas: A Quantitative Approach to Building Trading Strategies 2nd
6 个回复 - 1831 次查看 Finding Alphas: A Quantitative Approach to Building Trading Strategies Author(s): Igor Tulchinsky et al. Publisher: Wiley, Year: 2020 ISBN: 1119571219,9781119571216 Description: Discove ...2019-12-29 10:42 - hhasoka - Forum
2020新书 - Algorithmic Trading and Quantitative Strategies
20 个回复 - 11154 次查看 论坛原有的有点贵,我看已经那个已经传了有段时间了,便宜送给币少的朋友2021-8-13 00:24 - kayvid - 量化投资
quantitative trading - algorithms, analytics, data, models, optimization (2017)
9 个回复 - 3342 次查看 quantitative trading - algorithms, analytics, data, models, optimization (2017) (.pdf)2018-4-5 08:20 - loneshark - 投资人(实务版)
【华尔街系列】用量子力学来炒股 Quantum Trading
141 个回复 - 8554 次查看 欢迎订阅wwqqer文库!2016-1-25 00:00 - wwqqer - 金融学(理论版)
[论坛首发] 原版高清 Applied Quantitative Methods for Trading and Investment
406 个回复 - 41310 次查看 davidoff6出品,必属精品 回复后见解压密码 **** 本内容被作者隐藏 ****2010-5-9 16:19 - davidoff6 - 金融学(理论版)
Pairs Trading - Quantitative Methods and Analysis
2 个回复 - 2449 次查看 Pairs Trading - Quantitative Methods and Analysis 经典的quant trading 教程2022-4-28 08:07 - lawrencexp - 量化投资
Algorithmic Trading and Quantitative Strategies 1st Edition
6 个回复 - 2306 次查看 量化交易书籍 Algorithmic Trading and Quantitative Strategies 1st Edition 论坛有个人卖的太贵,奸商。。。这个世界只有信息应该收费,知识不应该!!!2021-3-7 17:54 - fengyun6363 - 量化投资
Pairs Trading: Quantitative Methods and Analysis [EPUB]
0 个回复 - 509 次查看 Pairs Trading: Quantitative Methods and Analysis [EPUB] English | 2004 | ISBN: 0471460672 | 224 pages | EPUB[/backcolor] [/backcolor] [/backcolor]2021-9-26 11:38 - zhangke0987 - 投资人(实务版)
Algorithmic Trading and Quantitative Strategies First edition published 2020
4 个回复 - 841 次查看 Algorithmic Trading and Quantitative Strategies2021-9-23 22:45 - pseudocodes - 量化投资
英文原版:Finance,.Applied Quantitative Methods for Trading and Investment
22 个回复 - 7901 次查看 Finance,.Applied Quantitative Methods for Trading and Investment.英文原版的,给需要的同学提供一系列有力的评价模型体系2009-6-10 15:16 - 开拓者936 - 金融学(理论版)
Inside the Black Box - The Simple Truth About Quantitative Trading
7 个回复 - 2358 次查看 Inside the Black Box - The Simple Truth About Quantitative Trading2017-7-18 17:23 - hcuieee - 量化投资
quantum finance - intelligent forecast and trading systems (2020)
1 个回复 - 1706 次查看 quantum finance - intelligent forecast and trading systems (2020)2019-11-18 14:14 - loneshark - 投资人(实务版)
Finding Alphas A Quantitative Approach to Building Trading Strategies(azw3版)
8 个回复 - 2109 次查看 书名: Finding Alphas: A Quantitative Approach to Building Trading Strategies (The Wiley Finance Series) 作者: Igor Tulchinsky 作者分类: Tulchinsky, Igor 出版日期: 8月 2015 出版: Wil ...2018-12-28 15:46 - zhangke0987 - 投资人(实务版)
FINDING ALPHAS -- A Quantitative Approach to Building Trading Strategies 2015版
1 个回复 - 1540 次查看 书名:FINDING ALPHAS--A Quantitative Approach to Building Trading Strategies (2015版) 作者:Igor Tulchinsky et al.WorldQuant Virtual Research Center 一本技术面策略讲解非常清晰的书,相较传统技术面策 ...2019-6-18 11:28 - yellopple - 量化投资
【书】Finding Alphas: A Quantitative Approach to Building Trading Strategies
5 个回复 - 2200 次查看 Worldquant Igor_Tulchinsky的书。 HOW TO IDENTIFY POTENTIAL PROFIT OPPORTUNITIES FROM MARKET BEHAVIORS OTHERS HAVE BEEN UNABLE TO QUANTIFYFinding Alphas seeks to teach you how to do one thing and ...2019-4-25 09:36 - l164668567 - 量化投资
Finding Alphas: A Quantitative Approach to Building Trading Strategies
7 个回复 - 7936 次查看 Design more successful trading systems with this practical guide to identifying alphasFinding Alphas seeks to teach you how to do one thing and do it well: design alphas. Written by experienced practi ...2015-9-9 10:32 - nelsoncwlee - 投资人(实务版)
Quantitative Technical Analysis: An integrated approach to trading system
4 个回复 - 2770 次查看 Quantitative Technical Analysis: An integrated approach to trading system development trading management pdf下载 This book, the fifth by Dr. Howard Bandy, discusses an integrated approach to tradin ...2016-10-14 15:52 - 浪子彦青 - 休闲灌水
[R书籍]Quantitative Trading with R[原版pdf]
158 个回复 - 33612 次查看 Harry Georgakopoulos, "Quantitative Trading with R: Understanding Mathematical and Computational Tools from a Quant's Perspective" English | ISBN: 1137354070 | 2015 | 291 pages | PDF | 18 MB ...2015-3-9 22:43 - igs816 - 量化投资
【学习笔记】求书,Pairs trading:quantitative methods and analysis(Wiley ...
1 个回复 - 858 次查看 求书,Pairs trading:quantitative methods and analysis(Wiley 2004),谢谢2020-3-2 23:37 - XunD - Forum
Quantitative Trading
3 个回复 - 2675 次查看 资料不完整,下载需谨慎2017-11-17 15:45 - fengyg - 量化投资
Quantitative Trading with R: Understanding Mathematical and Computational Tools
1 个回复 - 1267 次查看 Quantitative Trading with R: Understanding Mathematical and Computational Tools from a Quant’s Perspective English | January 20, 2015 | ISBN: 1137354070, 1349469866 | PDF | 272 pages | 9.8 MB[/backc ...2019-12-15 16:18 - zhangke0987 - 投资人(实务版)
【学习笔记】雷猴! 求 Quantitative Trading with R: Understanding Mathem ...
1 个回复 - 355 次查看 雷猴! 求 Quantitative Trading with R: Understanding Mathematical and Computational Tools 和 Python for Probability, Statistics, and Machine Learning,2nd 谢谢2019-10-27 01:05 - kevinlee1996 - Forum
【学习笔记】求助 quantum finance - intelligent forecast and trading syst ...
0 个回复 - 494 次查看 求助 quantum finance - intelligent forecast and trading systems2019-11-28 21:35 - specialuse - Forum
Finding Alphas-A Quantitative Approach to Building Trading Strategies
4 个回复 - 2787 次查看 HOW TO IDENTIFY POTENTIAL PROFIT OPPORTUNITIES FROM MARKET BEHAVIORS OTHERS HAVE BEEN UNABLE TO QUANTIFYFinding Alphas seeks to teach you how to do one thing and do it well – design alphas. For finan ...2019-2-6 10:31 - likehere - 金融学(理论版)
量化交易:如何构建你自己的算法交易系统Quantitative Trading - How to Build Your O
11 个回复 - 4858 次查看 量化交易:如何构建你自己的算法交易系统Quantitative Trading - How to Build Your Own Algorithmic Trading Business 著 译 者: Ernie Chan  著 [同作者作品] ISBN: 9780470284889 出版日期: 2008-10 ...2015-9-22 10:45 - vivoid - 量化投资
Quantitative Trading with R
149 个回复 - 22310 次查看 Quantitative Trading with R Harry Georgakopoulos 书评: 量化领域书越来越多。这本书用R来描述量化投资中分析的一些数学手段,一些基础工具,如果你使用R 这本书作为起点是不错的,如果你以前使用其他工具,没 ...2015-2-25 13:53 - RiverSide - 量化投资
quantmod - R:Quantitative Financial Modelling & Trading Framework for R
3 个回复 - 1304 次查看 Quantitative Financial Modelling & Trading Framework for [/backcolor]R[/backcolor]2017-7-23 17:29 - 啃读 - R语言论坛
Quantitative Trading Systems: Practical Methods for Design, Testing, and Va
12 个回复 - 4623 次查看 Howard B. Bandy, "Quantitative Trading Systems: Practical Methods for Design, Testing, and Validation" English | 2007 | ISBN: 0979183804 | PDF | 366 pages | 7.2 MB Written by former university pro ...2012-5-23 11:53 - justfly2004 - 金融学(理论版)
Panda Quantitative trading holdings
0 个回复 - 1077 次查看 Quantitative trading refers to the substitution of artificial subjective judgment with advanced mathematical models, the use of computer technology from the huge historical data to audition can bri ...2019-4-22 13:48 - Panda_quant - 量化投资
[下载]最优交易策略:管理市场冲击和交易风险的计量途径(Optimal Trading Strategies: Quantitative Approaches
17 个回复 - 9843 次查看 【书名】 Optimal Trading Strategies: Quantitative Approaches for Managing Market Impact and Trading Risk 【作者】Robert Kissell and Morton Glantz 【出版社】AMACOM, American Management Associ ...2009-3-17 14:57 - 七带犰狳 - 计量经济学与统计软件
【定量交易】 Quantitative Trading : Algorithms, Analytics, Data, Models (2016)
121 个回复 - 20319 次查看 Quantitative Trading: Algorithms, Analytics, Data, Models, Optimization Xin Guo, Tze Leung Lai, Howard Shek, Samuel Po-Shing Wong The first part of this book discusses institutions and mecha ...2017-1-25 07:25 - cmwei333 - 金融学(理论版)
最新版[quantstart.com] Advanced Algorithmic Trading PDF + code
3 个回复 - 3792 次查看 本人咬咬牙花了79USD买了。刚刚更新了新版本。需要分享80人民币分享购买。感兴趣的可以发邮件给我。 链接末端被涂黑了 https://www.quantstart.com/successful-algorithmic-trading-ebook Machine Learning App ...2017-7-15 23:06 - OK890705 - 量化投资
Automated Trading with R: Quantitative Research and Platform Development (2016)
17 个回复 - 3811 次查看 Automated Trading with R: Quantitative Research and Platform Development by Christopher Conlan (Author) This book explains the broad topic of automated trading, starting with its mathemati ...2016-10-8 21:46 - cmwei333 - R语言论坛
免費 Optimal Trading Strategies: Quantitative Approaches for Managing Market..
15 个回复 - 5871 次查看 Optimal Trading Strategies: Quantitative Approaches for Managing Market Impact and Trading Risk Robert Kissell (Author), Morton Glantz (Author) Publication Date: July 9, 2003 "The dec ...2012-11-19 00:30 - martinnyj - 金融学(理论版)
最新版[quantstart.com] Successful Algorithmic Trading PDF + code
0 个回复 - 3868 次查看 本人咬咬牙花了79USD买了。需要分享80人民币分享购买。感兴趣的可以发邮件给我kou001@e.ntu.edu.sg。 链接末端被涂黑了. Struggling To Make Profitable Algo Trading Strategies?You didn't set out to lose ...2017-7-15 23:14 - OK890705 - 金融工程(数量金融)与金融衍生品
Quantitative Trading Systems, 2nd Edition by Dr Howard B Bandy
13 个回复 - 8683 次查看 一本很好的书,介绍了多种经典数量交易模型的建立,检测以及校准Editorial ReviewsReviewI want to thank you for your excellent, no superb, clarity in describing mechanical trading systems and the issues th ...2014-10-12 11:14 - pzh12345 - 金融学(理论版)
求Quantitative Technical Analysis: An integrated approach to trading system
18 个回复 - 8903 次查看 100论坛币:寻PDF 格式的电子书: Quantitative Technical Analysis: An integrated approach to trading system development ...2015-2-10 10:58 - gzok0123 - 悬赏大厅
Causality between trading volume and returns: Evidence from quantile regressions
2 个回复 - 1075 次查看 【作者(必填)】 Bartosz Gebkaa, 1, , Mark E. Wohar 【文题(必填)】 Causality between trading volume and returns: Evidence from quantile regressions【年份(必填)】 2013 【全文链接或数据库名称(选填)】 ...2017-4-19 18:46 - internet.hzx - 求助成功区
【不多说了】Quantitative Methods for Electricity Trading and Risk Management
32 个回复 - 5339 次查看 书名:Quantitative Methods for Electricity Trading and Risk Management: Advanced Mathematical and Statistical Methods for Energy Finance [*]出版社: Palgrave Macmillan (2006年1月31日) [*]丛书名: ...2014-9-8 23:19 - 莪的噯°迩罘懂 - 金融学(理论版)
Causality between trading volume and returns: Evidence from quantile regressions
1 个回复 - 840 次查看 【作者(必填)】 Bartosz Gebkaa, 1, , Mark E. Wohar 【文题(必填)】 Causality between trading volume and returns: Evidence from quantile regressions【年份(必填)】 2013 【全文链接或数据库名称(选填)】 ...2017-4-13 18:09 - internet.hzx - 求助成功区
Vidyamurthy+Pairs trading: quantitative methods and analysis
3 个回复 - 1841 次查看 【作者(必填)】Vidyamurthy 【文题(必填)】Pairs trading: quantitative methods and analysis 【年份(必填)】2004 【全文链接或数据库名称(选填)】2016-7-22 11:24 - harlon1976 - 求助成功区
一本算法交易实务的书Quantitative Trading :How to Build Your Own Algorithmic
16 个回复 - 7814 次查看 本帖最后由 wanghaidong918 于 2010-3-26 11:43 编辑 <P>很务实的一本书,现在太穷了,只好卖点书了! </P> <P>C H A P T E R 1<BR>The Whats,Whos, and Whys of Quantitative Trading</P> ...2009-4-3 14:20 - mardonjuan - 经济金融数学专区
量化投资必看的一本实务书《Quantitative trading》,有实现的源程序解读,英文原版
23 个回复 - 12669 次查看 量化投资必看的一本实务书《Quantitative trading》,书中的源程序可被实操引用,英文原版2013-2-19 14:02 - larrytl - 金融学(理论版)
Quantitative Equity Trading - The Complete Arbitrage Deskbook
9 个回复 - 3099 次查看 It's for US business school's Equity Trading course. by Irwin Library.2009-11-2 08:47 - CATREE - 金融学(理论版)
Quantitative Trading Strategies by Lars Kestner
14 个回复 - 6247 次查看 Product Description Harnessing the Power of Quantitative Techniques to Create a Winning Trading ProgramLars Kestner Quantitative Trading Strategies takes readers through the development and evaluatio ...2010-6-24 09:56 - emtropy - 量化投资
免费免费~~Quantitative Trading Strategies by Lars Kestner
9 个回复 - 5579 次查看 Product Description Harnessing the Power of Quantitative Techniques to Create a Winning Trading ProgramLars Kestner Quantitative Trading Strategies takes readers through the development and evaluatio ...2010-9-21 09:56 - jlwangsdu - 金融工程(数量金融)与金融衍生品
求machine learning in quant trading的文献
1 个回复 - 1124 次查看 machine learning in quant trading 有什么好的paper或者书吗,大家有什么资料建议。2016-4-13 23:29 - GHUU1 - 量化投资
Quantitative Grid Trading
2 个回复 - 1579 次查看 I m looking for this book, kindly let me know if you have it...Thx Quantitative Grid Trading:How a Fisherman Beats Wall Street By Frank Linn2016-3-14 14:40 - QuantQ1 - 求助成功区
Fred Gehm: Quantitative Trading & r Money Management
4 个回复 - 2580 次查看 Fred Gehm: Quantitative Trading & r Money Management2014-10-19 00:06 - mk3chan - 金融工程(数量金融)与金融衍生品
Trading Stocks and Options with Moving Averages - A Quantified Approach
2 个回复 - 1595 次查看 A Powerful New Way to Trade Moving Averages in Any Market Quantified Research Identifies High Probability Short-Term Trades with Positive Returns Do You Trade with Moving Averages? Moving ...2015-6-21 11:54 - nelsoncwlee - 投资人(实务版)
Stock Market Edges: A quantitative guide to developing winning trading strategie
3 个回复 - 2060 次查看 Improve the precision, accuracy and profitability of your stock market trading strategies by leveraging some of the many market edges that successful traders exploit every day. Read this book to l ...2015-9-13 08:33 - nelsoncwlee - 投资人(实务版)
Quantitative Trading how to Build Your Own Algorithmic TradingBusiness
15 个回复 - 9634 次查看 一本浅显易懂的交易系统入门读物。 作者:ERNESTP.CHAN 英文 202页 不过比较简单。内有不少vba的代码和matlab的代码(交易策略) Amazon链接:http://www.amazon.com/Quantitative-Trading-Build-Algor ...2010-6-5 17:14 - CrewsHe - 金融学(理论版)
FINANCE Quantitative analysis, derivatives modeling, and trading strategies
6 个回复 - 2309 次查看 Springer - Interest Rate Models_ Theory and Practice2013-7-14 13:09 - dapbook - 金融工程(数量金融)与金融衍生品
Quantitative Trading with R
2 个回复 - 3866 次查看 本论坛量化投资版有此书,链接如下http://bbs.pinggu.org/thread-3589087-1-1.html 但是pdf版本的,我下载以后发现他应该是kindle格式转换过去的,尽管不妨碍阅读,但实际上排版效果不是太好,现发azw3格式的,收10 ...2015-2-26 18:57 - allain - R语言论坛
Quantitative Trading with R: Understanding Mathematical and Computational Tools
25 个回复 - 2293 次查看 99rabbit 版主注明: 下面的附件都是 Lecture Notes 请购买者注意, 该书还在等待网友补充上传完善, 如果有网友尽快上传,会给予适当奖励,并删除该贴。等待资料的网友请遵守版规不要投诉或人生攻击。 上传完毕 ...2015-1-2 11:46 - tigerwolf - 商学院
求助:Quantitative Trading with R
5 个回复 - 2308 次查看 求助:Look forward to reading this book "Quantitative Trading with R: Understanding Mathematical and Computational Tools from a Quant's Perspective". XIE XIE! http://www.amazon.com/Quantitative-Tra ...2015-2-22 08:21 - waterhorse - R语言论坛
Inside the Black Box: The Simple Truth about Quantitative Trading
21 个回复 - 6672 次查看 那位大牛能提供这本书的电子版啊?不能感激。。。2012-4-28 08:55 - lovebao - 悬赏大厅
Pairs Trading Quantitative Methods and Analysis
1 个回复 - 1033 次查看 Pairs Trading Quantitative Methods and Analysis2014-12-8 06:19 - Eugenechan002 - 休闲灌水
2000币 Quantitative Grid Trading:How a Fisherman Beats Wall Street By Frank Linn
0 个回复 - 3229 次查看 2000币求 Quantitative Grid Trading:How a Fisherman Beats Wall Street By Frank Linn Paperback: 284 pages Publisher: CreateSpace Independent Publishing Platform (July 15, 2011) Language: English ...2014-9-29 01:05 - tigerwolf - 商学院
求英文書一本 Quantum Trading by Fabio Oreste
5 个回复 - 1809 次查看 Preface ix CHAPTER 1 The Birth of Quantum Trading: How Einstein’s Theories and Quantum Particles Affect Your Daily Trading 1 A Lesson in Elementary Physics 6 P-Space: A Quantum Trading Tool 16 ...2014-8-24 11:59 - yaominlinbigsun - 悬赏大厅
电子书 Quantitative Trading How to Build Your Own Algorithmic Trading Business
1 个回复 - 2990 次查看 分享电子书 Quantitative Trading How to Build Your Own Algorithmic Trading Business; http://book.douban.com/subject/3361807/ 做数量化投资者的参考书。2012-3-3 18:59 - yanqismile - 计量经济学与统计软件
Quantitative Trading System (Howard Bandy)
3 个回复 - 5120 次查看 Quantitative Trading System (Howard Bandy) 找了好久的书, 拿出来共享。。。2010-4-3 12:28 - bmwooooo - 金融学(理论版)
[REQ]Applied Quantitative Methods for Trading and Investing的隨書附送CD
3 个回复 - 2696 次查看 書籍詳細資料http://www.amazon.com/Applied-Quantitative-Methods-Trading-Investment/dp/0470848855/ref=sr_1_1/191-1453107-8475647?ie=UTF8&s=books&qid=1245240998&sr=8-1?ie=UTF8&tag=quanfinacodei-2 ...2009-10-24 09:31 - emtropy - 金融工程(数量金融)与金融衍生品
reason you want to know quantitative trading
0 个回复 - 2009 次查看 2014-5-1 04:36 - fanelin - 量化投资
Applied Quantitative Methods for Trading and Investment
4 个回复 - 2442 次查看 Applied Quantitative Methods for Trading and Investment (The Wiley Finance Series) Christian L. Dunis (Editor), Jason Laws (Editor), Patrick Naïm (Editor) Publication Date: October ...2014-3-16 12:50 - martinnyj - 金融学(理论版)
感谢: Quantitative Trading Systems, 请设购买
5 个回复 - 2283 次查看 请上传后设置价格购买。 谢谢了! 书名: Quantitative Trading Systems - Practical Methods For Design, Testing and Validation作者: Author: Howard B. Bandy2010-11-3 13:20 - 99rabbit - 求助成功区
一本算法交易实务的书Quantitative Trading :How to Build Your Own Algorithmic
21 个回复 - 6098 次查看 Product DescriptionWhile institutional traders continue to implement quantitative (or algorithmic) trading, many independent traders have wondered if they can still challenge powerful industry profess ...2010-5-15 22:31 - lmk0043 - 经济金融数学专区
经典:Applied Quantitative Methods for Trading and Investment
3 个回复 - 2500 次查看 Applied Quantitative Methods for Trading and Investment 交易投资中的数量方法 数量金融经典书籍 Preface xv 1 Applications of Advanced Regression Analysis for Trading and Investment 1 Christi ...2009-7-23 21:31 - 01261416 - 金融学(理论版)
[论坛首发] 原版高清 Quantitative Trading
81 个回复 - 9484 次查看 davidoff6出品,必属精品 回复后见解压密码 **** 本内容被作者隐藏 ****2010-5-13 10:41 - davidoff6 - 投资人(实务版)
Quantitative Trading:如何创建自己的算法交易事业
35 个回复 - 10340 次查看 关于量化交易的一本书,Quantitative_Trading_How_to_Build_Your_Own_Algorithmic_Trading_Business 对金融工程感兴趣的同学可以关注Professor Liu的博客http://blog.sina.com.cn/qiangliuql 其博文主要关于金融 ...2011-6-25 22:40 - supershancky - 金融工程(数量金融)与金融衍生品
[下载]Quantitative trading
10 个回复 - 6052 次查看 Author: Ernie ChanPublisher: WileyNumber of Pages: 182Published: 2008-11-17List price: $60.00ISBN-10: 0470284889ISBN-13: 9780470284889书籍介绍(英文)While institutional traders continue to implement ...2009-1-20 23:25 - readbook2005 - 创新与战略管理