结果:找到“design experiment”相关内容330个,排序为按回复时间降序,搜索更多相关帖子请点击“高级
Design and Analysis of Experiments, 10th Edition by Douglas C. Montgomery
20 个回复 - 10055 次查看 Design and Analysis of Experiments, 第10版 英文原版2020-8-26 02:22 - jh2623623 - 计量经济学与统计软件
Experimental and quasi-experimental designs for generalized causal inference
3 个回复 - 1974 次查看 Experimental and Quasi-Experimental Designs for Generalized Causal Inference 2002 by William R. Shadish, Thomas D. Cook, Donald T. Campbell pdf扫描,非高清版,单页,效果尚可;646页。2019-5-7 16:15 - qffq - 数据分析与数据挖掘
A First Course in Design and Analysis of Experiments,Gary W. Oehlert
18 个回复 - 5245 次查看 A First Course in Design and Analysis of Experiments Gary W. Oehlert University of Minnesota ISBN 0-7167-3510-5 目录 1 Introduction 1 2 Randomization and Design 13 3 Completely Randomized Desig ...2011-1-28 03:46 - dellian - 计量经济学与统计软件
【第9版】Design and Analysis of Experiments, by Douglas C. Montgomery
54 个回复 - 12222 次查看 Design and Analysis of Experiments, 9th Edition by Douglas C. Montgomery Design and Analysis of Experiments, 9th Edition continues to help senior and graduate students in engineering, busine ...2018-8-30 17:34 - leonkd - 计量经济学与统计软件
Optimal Design of Experiments:A Case Study Approach
7 个回复 - 2962 次查看 推荐一本试验设计应用书籍2015-4-25 17:29 - guobingm - 计量经济学与统计软件
Design and Analysis of Experiments with R (John Lawson)
11 个回复 - 6584 次查看 618 pages 新手第一次上传,希望能够有用2017-1-25 03:28 - slu0822 - R语言论坛
【经典教材系列】Design and Analysis of Experiments with SAS
127 个回复 - 11648 次查看 2010年经典教材降价出售期已过。想要随时跟踪最新好书,请点击头像下方“加关注”。关注成功后,查看这里即可:三步走把千本好书“一网打尽”!。 [相关阅读] 【经典教材系列】(资料汇总帖,附链接,持续添加 ...2015-7-23 19:11 - wwqqer - 商业数据分析
实验设计与分析 Dean,2017,Design and Analysis of Experiments, 2nd Edition
9 个回复 - 2633 次查看 实验设计与分析 Dean, A.M., Voss, D., and Draguljic, D. (2017), Design and Analysis of Experiments, 2nd Edition, Springer.2018-2-27 22:25 - 叶蕴锋 - EViews专版
Experimental Design and Process Optimization
9 个回复 - 1963 次查看 Experimental Design and Process Optimization delves deep into the design of experiments (DOE). The book includes Central Composite Rotational Design (CCRD), fractional factorial, and Plackett and ...2016-1-30 09:42 - Nicolle - winbugs及其他软件专版
Designing Experiments and Analyzing Data: A Model Comparison Perspective 3rd
30 个回复 - 1701 次查看 2017 | English | ISBN-10: 0805822232 | PDF | 1071 Page This classic text on multiple regression is noted for its nonmathematical, applied, and data-analytic approach. Readers profit from its v ...2018-5-11 11:08 - igs816 - 经管书评
The Design and Analysis of Computer Experiments, 2nd Edition
13 个回复 - 1685 次查看 The Design and Analysis of Computer Experiments (Springer Series in Statistics) By 作者: Thomas J. Santner – Brian J. Williams – William I. Notz ISBN-10 书号: 149398845X ISBN-13 书号: 97814939884 ...2019-2-23 15:58 - 13950050756 - 经管书评
The Design of Experiments by Fisher
4 个回复 - 1527 次查看 2018-7-26 10:39 - delianiax - 大数据技术
Design and Analysis of Experiments, 9th Edition (PDF)
35 个回复 - 4179 次查看 PURPOSE: To our knowledge we report the first single center, prospective, randomized study comparing holmium laser enucleation and high performance GreenLight™ prostate photoselective vaporiza ...2018-9-13 22:01 - igs816 - 经管书评
How to Design and Report Experiments
13 个回复 - 1045 次查看 English | 2003 | ISBN: 0761973834 | 396 Pages | AZW3 | 6.04 MB `I strongly recommend this book. The all-important steps of defining the research question and choosing an appropriate method a ...2018-1-16 11:15 - igs816 - 经管书评
Design of Experiments Statistical Principles of Research Design and Analysis
27 个回复 - 5344 次查看 作者:R. O. Kuehl 抱歉,第一个附近传错了,重新传了正确的版本。2015-12-28 11:35 - 布鲁斯小然 - 计量经济学与统计软件
【经典教材系列】Experiments with Mixtures: Designs, Models, and the Analysis of
114 个回复 - 12206 次查看 欢迎订阅wwqqer文库!2016-2-17 19:05 - wwqqer - 数据分析与数据挖掘
Minimax designs for causal effects in temporal experiments with treatment habitu
1 个回复 - 406 次查看 【作者(必填)】 2323 【文题(必填)】 Minimax designs for causal effects in temporal experiments with treatment habituation 【年份(必填)】 2323 【全文链接或数据库名称(选填)】https://academic.oup.co ...2022-5-10 10:01 - internet.hzx - 求助成功区
Optimization with experimental design
2 个回复 - 563 次查看 【作者(必填)】Brisset, S.; Gillon, F.; Vivier, S.; Brochet, P. 【文题(必填)】Optimization with experimental design: an approach using Taguchi's methodology and finite element simulations 【年份( ...2019-8-19 16:54 - victorbian - 求助成功区
Optimization of RC structures using design of experiments
2 个回复 - 653 次查看 【作者(必填)】M.B.Krakovski 【文题(必填)】Optimization of RC structures using design of experiments 【年份(必填)】1997 【全文链接或数据库名称(选填)】https://www.sciencedirect.com/science/article/ ...2019-8-19 16:57 - victorbian - 求助成功区
求助RES文献Quasi-Experimental Shift-Share Research Designs
0 个回复 - 560 次查看 【作者(必填)】 Kirill Borusyak, Peter Hull, Xavier Jaravel 【文题(必填)】 Quasi-Experimental Shift-Share Research Designs 【年份(必填)】 2022 【全文链接或数据库名称(选填)】https://doi.org/10.109 ...2022-3-3 21:31 - Superficial000 - 文献求助专区
【独家发布】【2017】Designing Experiments and Analyzing Data
62 个回复 - 6933 次查看 【2017】Designing Experiments and Analyzing Data Book 图书名称:Designing Experiments and Analyzing Data: A Model Comparison Perspective Author 作者: Scott E. Maxwell, Harold D. Delaney, Ken Kel ...2018-5-8 10:33 - kychan - 数据分析与数据挖掘
Understanding Statistics and Experimental Design: How to Not Lie with Statistics
38 个回复 - 5680 次查看 Understanding Statistics and Experimental Design: How to Not Lie with Statistics by Michael H. Herzog (Author), Gregory Francis (Author), Aaron Clarke (Author) About the Author Michael Herzog is ...2019-9-3 07:12 - slowry - 金融学(理论版)
Quasi-Experimentation A Guide to Design and Analysis
6 个回复 - 1116 次查看 【作者(必填)】 Charles S. Reichardt【文题(必填)】 Quasi-ExperimentationA Guide to Design and Analysis【年份(必填)】 2019 【全文链接或数据库名称(选填)】https://www.guilford.com/books/Quasi-Experime ...2020-8-21 11:41 - 323191599 - 求助成功区
[免费分享]Montgomery Design and Analysis of Experiments 8th c2013 txtbk
54 个回复 - 10718 次查看 Montgomery Design and Analysis of Experiments 8th c2013 txtbk。pdf,另外,我不想让帖子沉了,怎么就设置成回复才可以下载了?2014-8-27 19:09 - xiaoxiong007 - R语言论坛
JMP 11 Design of Experiments Guide
2 个回复 - 1452 次查看 [*]JMP 11 Design of Experiments Guide [*]By: SAS Institute [*]Publisher: SAS Institute [*]Pub. Date: September 06, 2013 [*]Print ISBN-13: 978-1-61290-659-1 [*]Electronic ISBN-13: 978-1-6129 ...2015-3-10 21:36 - Nicolle - winbugs及其他软件专版
How to Design and Report Experiments
0 个回复 - 541 次查看 心理学实验经典指导书目 How to Design and Report Experiments by Andy Field and Graham Hole2021-4-1 21:41 - your-majesty - 新手入门区
On the optimality of randomization in experimental design: How to randomize for
1 个回复 - 549 次查看 【作者(必填)】 23 【文题(必填)】 On the optimality of randomization in experimental design: How to randomize for minimax variance and design‐based inference【年份(必填)】 23 【全文链接或数据库名 ...2021-3-29 09:53 - internet.hzx - 文献求助专区
R实验设计入门(ANOVA): A first course in design and analysis of experiments
0 个回复 - 683 次查看 1.书名 《A first course in design and analysis of experiment》(实验设计与分析) 2.作者:Gary W. Oehlert 根据这本书来用R进行实验设计+数据分析的时候非常有用~2021-1-26 23:09 - 111115112 - R语言论坛
求书:Field experiments : design, analysis, and interpretation
6 个回复 - 3980 次查看 作者 Gerber and Green 新书,很难求得。多谢分享!2013-2-21 07:51 - dingpeng - 计量经济学与统计软件
Designing Experiments and Analyzing Data, 2nd Edition
3 个回复 - 1063 次查看 求资料! Designing Experiments and Analyzing Data, 2nd Edition 出版年份:2003 作者:Maxwell, Delaney, Kelley2016-12-11 01:57 - leopoldwilson - 求助成功区
Data Analysis for Experimental Design
0 个回复 - 653 次查看 【作者(必填)】 Richard Gonzalez【文题(必填)】 Data Analysis for Experimental Design【年份(必填)】 2008 【全文链接或数据库名称(选填)】https://www.guilford.com/books/Data-Analysis-for-Experimental-D ...2020-8-21 11:37 - 323191599 - 文献求助专区
Taguchi Methods, Design of experiments
2 个回复 - 536 次查看 【作者(必填)】G. Taguchi 【文题(必填)】Taguchi Methods, Design of experiments 【年份(必填)】1993 【全文链接或数据库名称(选填)】https://www.researchgate.net/publication/292446196_Taguchi_Methods ...2020-6-7 08:41 - victorbian - 求助成功区
[感谢上传]Practical Statistics and Experimental Design(Minitab, SAS)
51 个回复 - 5330 次查看 Presents readers with a user-friendly, non-technical introduction to statistics and the principles of plant and crop experimentation. Avoiding mathematical jargon, it explains how to plan and desi ...2016-1-30 09:29 - Nicolle - winbugs及其他软件专版
【学习笔记】求《design and analysis of simulation experiments》作者Jack ...
1 个回复 - 467 次查看 求《design and analysis of simulation experiments》作者Jack PC kleijnen2019-9-22 09:18 - 15981939361 - Forum
【学习笔记】麻烦帮找一下Graphical Methods for the Design of Experiments, ...
1 个回复 - 592 次查看 麻烦帮找一下Graphical Methods for the Design of Experiments,https://b-ok.cc/book/2135745/2d2013。谢谢!2019-11-8 17:52 - 匹马青衫 - Forum
Design of Experiments with MINITAB
15 个回复 - 3317 次查看 Title: Design of Experiments with MINITAB Volume: Author(s): Mathews, Paul G. Series: Periodical: Publisher: American Society for Quality (ASQ) ...2014-12-21 10:23 - oliyiyi - MATLAB等数学软件专版
Design of Experiments by Examples Using Matlab
22 个回复 - 3018 次查看 English | 18 Oct. 2017 | ISBN: 1974098109 | ASIN: B076KSNJGK | 204 Pages | AZW3 | 4.85 MB MATLAB Model-Based Calibration Toolbox provides apps and design tool ...2017-10-26 14:59 - igs816 - MATLAB等数学软件专版
[下载]Wiley07《现代实验设计》(Modern Experimental Design)
22 个回复 - 8534 次查看 <p><strong><font size="3">Modern Experimental Design (Wiley Series in Probability and Statistics)<!--Element not supported - Type: 8 Name: #comment--><br/></font></strong ...2007-11-17 01:31 - dannin - 计量经济学与统计软件
experimental design实验设计的相关资料~如果你想从数理上搞明白模型
3 个回复 - 2342 次查看 Experimental design在生物、农业、工业领域应用广泛,但感觉国内高校experimental design和variance analysis普遍开课较少。这是一门如果你知道用的什么模型,就应该知道要怎么进行分析的学科。无论有几个变量,也无 ...2010-12-26 05:04 - yewenzhe1988 - 计量经济学与统计软件
Experimental Design Techniques in Statistical Practice
4 个回复 - 1090 次查看 Experimental Design Techniques in Statistical Practice: a practical software-based approach W.P.Gardiner and G.Gettinby 这本书的一个特殊的目的是培养读者欣赏和理解实验设计,使读者具备以切合实际的方 ...2015-12-30 17:32 - breeding - 计量经济学与统计软件
实验设计经典教材 高清版 ANALYSIS OF MESSY DATA VOLUME 1 DESIGNED EXPERIMENTS
8 个回复 - 3758 次查看 实验设计经典教材 高清版 ANALYSIS OF MESSY DATA VOLUME 1 DESIGNED EXPERIMENTS 第二版2015-1-21 08:12 - ccqi - 经管考研
Optimal Experimental Design with R 下载
14 个回复 - 4402 次查看 Contents List of Figures List of Tables Preface Acknowledgments 1. Introduction I. Determining the Minimal Size of an Experiment for Given Precision 2. Sample Size Determ ...2012-1-11 13:11 - qoiqpwqr - R语言论坛
求书:Field Experiments: Design, Analysis, and Interpretation
0 个回复 - 974 次查看 求电子版[/backcolor] Gerber, A.S., and D.P. Green [2012]. Field Experiments: Design, Analysis, and Interpretation. New York, NY: W. W. Norton. [/backcolor] ISBN:9780393979954[/backcolor]2020-2-10 15:55 - dddyyylll - 悬赏大厅
【学习笔记】求《The Design and Analysis of Computer Experiments》,最近一 ...
2 个回复 - 563 次查看 求《The Design and Analysis of Computer Experiments》,最近一直在学习有关试验设计的知识,前段时间学的是比较简单的经典传统实验设计方法,现在想进阶学一下,计算机仿真实验,希望群主能帮忙找到这本书,非常感 ...2019-9-26 07:33 - 15981939361 - Forum
【学习笔记】求《Design And Modeling for Computer Experiments》
3 个回复 - 547 次查看 求《Design And Modeling for Computer Experiments》2019-9-27 08:27 - 15981939361 - Forum
【学习笔记】求Montgomery-Design and Analysis of Experiments, 6th Edition ...
1 个回复 - 511 次查看 求Montgomery-Design and Analysis of Experiments, 6th Edition,谢谢2019-10-10 09:18 - Ginger_JJ - Forum
Experimental design for the life science给需要的人
1 个回复 - 625 次查看 Experimental design for the life science给需要的人2020-2-2 11:04 - BWen2019AAPW - 新手入门区
Fundamentals of Statistical Experimental Design and Analysis
3 个回复 - 1238 次查看 实验设计,书里有很多例子,值得一读2018-4-12 12:53 - 贵州省5 - 计量经济学与统计软件
【学习笔记】Experiment design
2 个回复 - 321 次查看 Experiment design2019-11-23 22:53 - 林嘉里 - Forum
Experimental Design for Behavioral and Social Sciences
2 个回复 - 1789 次查看 Experimental Design for Behavioral and Social Sciences(using SPSS) Howard J. Seltman November 1, 2009 http://bbs.pinggu.org/forum.php?mod=viewthread&tid=2867008&page=3&extra=#pid234590682014-2-3 02:17 - Nicolle - SPSS论坛
Design and Analysis of Experiments-R:试验设计分析—R程序操作
21 个回复 - 8597 次查看 香港浸会大学数学部整理的试验设计分析——R程序操作,分享给大家,希望大家能喜欢。此笔记比较大,只能按章节来上传了,不好意思。2013-8-2 07:45 - 孤峰傲雪 - R语言论坛
【学习笔记】求《The Design and Analysis of Computer Experiments》
0 个回复 - 430 次查看 求《The Design and Analysis of Computer Experiments》2019-9-26 07:36 - 15981939361 - Forum
【学习笔记】求《The Design and Analysis of Computer Experiments》,最近一 ...
0 个回复 - 405 次查看 求《The Design and Analysis of Computer Experiments》,最近一直在学习有关试验设计的知识,前段时间学的是比较简单的经典传统实验设计方法,现在想进阶学一下,计算机仿真实验,希望群主能帮忙找到这本书,非常感 ...2019-9-26 07:35 - 15981939361 - Forum
Experimental and quasi-experimental designs for generalized causal inference
8 个回复 - 5392 次查看 Experimental and Quasi-Experimental Designs for Generalized Causal Inference Paperback – January 2, 2001 by William R. Shadish (Author), Thomas D. Cook (Author), Donald T. Campbell (Author) ...2015-2-3 07:13 - a200610411 - SPSS论坛
【学习笔记】Understanding Statistics and Experimental Design: How to Not ...
0 个回复 - 254 次查看 Understanding Statistics and Experimental Design: How to Not Lie with Statistics2019-9-19 22:27 - bayesp - Forum
【学习笔记】求助该书 Design and Analysis of Experiments by DOUGLAS C. M ...
0 个回复 - 411 次查看 求助该书 Design and Analysis of Experiments by DOUGLAS C. MONTGOMERY a supplement for using JMP2019-9-14 10:25 - 15981939361 - Forum
Quality by Experimental Design, Fourth Edition (minitab)
29 个回复 - 3914 次查看 2016 | ISBN-10: 1482249669 | 756 Pages | PDF | 37 MB Achieve Technological Advancements in Applied Science and Engineering Using Efficient Experiments That Consume the Least Amount of Resources ...2017-2-23 14:20 - igs816 - 计量经济学与统计软件
【合集】Design and Analysis of Experiments Volume 1 - 3 Wiley
60 个回复 - 9423 次查看 Design and Analysis of Experiments一共三册。 Design and Analysis of Experiments, Introduction to Experimental Design (Wiley Series in Probability and Statistics) (Volume 1) Klaus Hinkelmann (Aut ...2013-8-10 00:53 - leonkd - 计量经济学与统计软件
Research Fiction and Thought Experiments in Design
2 个回复 - 347 次查看 【作者(必填)】Mark Blythe and Enrique Encinas 【文题(必填)】Research Fiction and Thought Experiments in Design 【年份(必填)】2018 【全文链接或数据库名称(选填)】https://www.nowpublishers.com/a ...2019-6-17 12:01 - dreamtree - 求助成功区
The Optimal Design of Blocked and Split-Plot Experiments
1 个回复 - 649 次查看 【作者(必填)】Peter goos 【文题(必填)】The Optimal Design of Blocked and Split-Plot Experiments 【年份(必填)】2002 【全文链接或数据库名称(选填)】2019-6-11 21:18 - poptide - 文献求助专区
The Design and Conduct of Meaningful Experiments Involving Human Participants
7 个回复 - 640 次查看 The Design and Conduct of Meaningful Experiments Involving Human Participants 25 Scientific Principles R. Barker Bausell Designing and conducting experiments involving human participants re ...2016-10-29 03:45 - cmwei333 - 经管书评
Design and Analysis of Experiments: Classical and Regression Approaches with SAS
118 个回复 - 9628 次查看 Product Details [*]Hardcover: 856 pages [*]Publisher: Chapman and Hall/CRC; 1 edition (July 29 2008) [*]Language: English [*]ISBN-10: 1874545189 [*]ISBN-13: 978-1874545187 [*]ASIN: 1420060546 ...2016-1-30 10:17 - Nicolle - winbugs及其他软件专版
2018新书 Experimental Design
3 个回复 - 385 次查看 Experimental Design: With Application in Management, Engineering, and the Sciences. 2nd ed. 2018 Edition [/backcolor] ...2019-3-29 12:02 - pika44 - 经管书评
Designing EEG Experiments for Studying the Brain
2 个回复 - 484 次查看 【作者(必填)】 by Aamir Saeed Malik (Author), Hafeez Ullah Amin (Author) 【文题(必填)】 Designing EEG Experiments for Studying the Brain 【年份(必填)】 May 25, 2017 【全文链接或数据库名称(选填)】 ...2018-5-18 11:09 - fullew - 求助成功区
Introduction to Statistical Methods, Design of Experiments and Statistical ..
4 个回复 - 1036 次查看 Introduction to Statistical Methods, Design of Experiments and Statistical Quality Control.20182018-12-20 18:53 - dgdgmariner - 数据分析与数据挖掘
求助书籍《Experimental design procedures for the behaviour sciences》 4th editio
5 个回复 - 1968 次查看 【作者(必填)】 Roger E. Kirk 【文题(必填)】 Experimental Design: Procedures for the Behavioral Sciences【年份(必填)】 2013 【全文链接或数据库名称(选填)】2016-9-17 11:42 - 企鹅8217 - 求助成功区
A new class of designs for mixture-of-mixture experiments
2 个回复 - 860 次查看 【作者(必填)】Hanen Hanna, Walter Tinsson 【文题(必填)】A new class of designs for mixture-of-mixture experiments 【年份(必填)】2014 【全文链接或数据库名称(选填)】http://link.springer.com/artic ...2014-3-2 22:26 - ozj9325 - 求助成功区
Gr&ouml;bner Basis Techniques for Design of Experiments
4 个回复 - 857 次查看 【作者(必填)】Satoshi Aoki, Hisayuki Hara, Akimichi Takemura 【文题(必填)】Gröbner Basis Techniques for Design of Experiments 【年份(必填)】2012 【全文链接或数据库名称(选填)】http://link ...2014-3-8 22:44 - ozj9325 - 求助成功区
sas design of experiments for direct marketing lecture note
14 个回复 - 2945 次查看 sas design of experiments for direct marketing Efficient Experimentation [*]practical and technical definitions of efficiency Testing a Single Factor [*]hypothesis testing [*]experiment ...2013-10-20 02:32 - duoweisa - 商业数据分析
A First Course in Design and Analysis of Experiments
4 个回复 - 2707 次查看 Oehlert - 2000 - A First Course in Design and Analysis of Experiments2014-11-17 05:35 - runningcindy - SAS专版
[经典丛书】Statistical Design and Analysis of Experiments (Classics in Applied
5 个回复 - 1751 次查看 Statistical Design and Analysis of Experiments (Classics in Applied Mathematics No 22. ) 亚马孙上五星评价, 但是有些老, 1999年版 作者:Peter W. M. John 共378页2014-12-22 12:35 - wh7064rg - 计量经济学与统计软件
北美权威教材“Design and Analysis of Experiments",第七版. 超清晰原版
8 个回复 - 2779 次查看 上次上传失败。 再传再失败。再想办法吧。2014-7-10 01:42 - mw89 - R语言论坛
求原书电子版!Quasi- experimentation design and analysis issues for field setti
2 个回复 - 1339 次查看 【作者(必填)】Thomas D cook 【文题(必填)】Quasi- experimentation design and analysis issues for field setting 【年份(必填)】1979 【全文链接或数据库名称(选填)】2016-2-28 11:42 - augustus777 - 文献求助专区
Statistics and Experimental Design for Toxicologists
7 个回复 - 678 次查看 **** 本内容被作者隐藏 ****2018-8-22 08:45 - Nicolle - winbugs及其他软件专版
求:Statistical Methods, Experimental Design and Scientific Inference
1 个回复 - 1009 次查看 全名:Statistical Methods, Experimental Design and Scientific Inference: A Re-issue of "Statistical Methods for Research Workers", The "Design of Experiments", and "Statistical Methods and Scientific ...2014-2-21 16:32 - 唐宋元清 - 悬赏大厅
Pharmaceutical Experimental Design and Interpretation, Second Edition
0 个回复 - 541 次查看 Completely revised and updated, Pharmaceutical Experimental Design and Interpretation, Second Edition explains the major methods of experimental design and evaluation such as multivariate, seq ...2018-6-21 10:36 - xdfhz - 经管书评
求原书电子版 Experimental and quasi-experimental designs for generalized causal
12 个回复 - 4713 次查看 求原书电子版 Experimental and Quasi-Experimental Designs for Generalized Causal Inference BY Shadish, Cook and Campbell2012-11-26 02:49 - bloodlife - 求助成功区
Quasi-Experimentation: Design and Analysis Issues for Field Settings (Book)
2 个回复 - 1395 次查看 【作者(必填)】cook,campbell 【文题(必填)】Quasi-Experimentation: Design and Analysis Issues for Field Settings (Book) 【年份(必填)】 1979 【全文链接或数据库名称(选填)】2017-3-16 20:49 - 宁静的城np - 文献求助专区