结果:找到“partial linear”相关内容69个,排序为按回复时间降序,搜索更多相关帖子请点击“高级
非线性偏微分方程手册Handbook of Nonlinear Partial Differential Equations
33 个回复 - 5337 次查看 非线性偏微分方程手册 Handbook of Nonlinear Partial Differential Equations Andrei D. Polyanin Valentin F. Zaitsev 非常有用的手边参考书 **** 本内容被作者隐藏 ****2014-11-15 16:12 - hylpy1 - 经济金融数学专区
【经典教材系列】Handbook of Linear Partial Differential Equations 第二版
78 个回复 - 9631 次查看 经典教材2015年第2版(共1623页),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”!。欢迎订阅wwqqer文库!2016-5-22 08:52 - wwqqer - 微观经济学
Fourier Analysis and Nonlinear Partial Differential Equations
12 个回复 - 5437 次查看 In recent years, the Fourier analysis methods have expereinced a growing interest in the study of partial differential equations. In particular, those techniques based on the Littlewood-Paley decompos ...2015-5-28 23:53 - lasgpope - 量化投资
Nonlinear partial differential equations in differential geometry
3 个回复 - 753 次查看 【作者(必填)】 【文题(必填)】Nonlinear partial differential equations in differential geometry 【年份(必填)】 【全文链接或数据库名称(选填)】www.ams.org/books/pcms/002/ 02 Nonlinear partial d ...2018-11-12 13:18 - 北固隐 - 求助成功区
求书:Nonlinear Partial Differential Equations with Applications
4 个回复 - 713 次查看 【作者(必填)】Tomáš Roubíček 【文题(必填)】Nonlinear Partial Differential Equations with Applications 【年份(必填)】2013 【全文链接或数据库名称(选填)】https://icerbox.com/DnLv1y ...2019-5-2 06:49 - caifacai - 求助成功区
Composite Quantile Estimation in Partial Functional Linear Regression Model Base
2 个回复 - 499 次查看 【作者(必填)】Ping Yu[/backcolor], Ting Li[/backcolor], Zhong Yi Zhu[/backcolor] & Jian Hong Shi[/backcolor] 【文题(必填)】Composite Quantile Estimation in Partial Functional Linear Regression Mod ...2022-3-17 09:51 - liu2008shu - 求助成功区
Estimation in a semiparametric partially linear errors-in-variables model
2 个回复 - 957 次查看 【作者(必填)】Liang H, Härdle W, Carroll R J. 【文题(必填)】Estimation in a semiparametric partially linear errors-in-variables model 【年份(必填)】 The Annals of Statistics, 1999, 27(5): ...2013-11-16 10:25 - yang2009jing - 求助成功区
【线性偏微分方程】 Linear Partial Differential Equations and Fourier Theory
18 个回复 - 2884 次查看 Linear Partial Differential Equations and Fourier Theory AUTHOR: Marcus Pivato Do you want a rigorous book that remembers where PDEs come from and what they look like? This highly visual int ...2017-1-17 03:48 - cmwei333 - 经济金融数学专区
Nonlinear Elliptic Partial Differential Equations An Introduction
4 个回复 - 1302 次查看 This textbook presents the essential parts of the modern theory of nonlinear partial differential equations, including the calculus of variations. After a short review of results in real and function ...2018-5-26 20:58 - nivastuli - 博弈论
Statistical inference for partially linear regression models
2 个回复 - 909 次查看 【作者(必填)】Jinhong You, Qinfeng Xu and Bin Zhou 【文题(必填)】Statistical inference for partially linear regression models with measurement errors 【年份(必填)】2008 【全文链接或数据库名称 ...2012-2-22 20:21 - guochaohui - 求助成功区
Structure Estimation in the Partially Linear Cox Model
6 个回复 - 2463 次查看 时间:12月4日(周四)下午4:00-5:00地点:京师学堂三层第七会议室报告人:Xingqiu Zhao题目: Structure Estimation in the Partially Linear Cox Model摘要:The partially linear Cox model assumes that it is ...2014-12-3 14:57 - happy_287422301 - 北京师范大学经管学部
partially linear functional-coefficient model
0 个回复 - 735 次查看 请教一下大家,partially linear functional-coefficient model和 partially linear model是一样的吗,都是非参数模型吗,谢谢大家2020-12-30 10:56 - 北京姑娘 - SPSS论坛
[免费但非无条件的分享]Partially Linear Models
3 个回复 - 2562 次查看 [/UserCP] 作者:Wolfgang Hardle, Hua Liang 等5人 [此贴子已经被作者于2005-12-14 8:45:12编辑过]2005-12-11 17:32 - xuqtl - 计量经济学与统计软件
Partially Linear Models
5 个回复 - 3219 次查看 PARTIALLY LINEAR MODELS Wolfgang Hardle Institut fur Statistik und Okonometrie Humboldt-Universitat zu Berlin D-10178 Berlin, Germany Hua Liang Department of Statistics Texas A&M University ...2011-3-30 19:58 - 楚韵荆风 - R语言论坛
Partially Linear Models(推荐一本好书)
14 个回复 - 3070 次查看 Partially Linear Models Editor: Wolfgang Hardle, Hua Liang, Jiti Gao. preface In the last ten years, there has been increasing interest and activity in the general area of partially linear re ...2012-4-12 10:30 - liu_xin - 计量经济学与统计软件
Variable selection for generalized varying coefficient partially linear models
3 个回复 - 1015 次查看 【作者(必填)】 Zheng-yan Lin and Yu-ze Yuan 【文题(必填)】 Variable selection for generalized varying coefficient partially linear models with diverging number of parameters 【年份(必填)】 Volu ...2012-9-17 11:27 - ynlihuiqiong - 求助成功区
Variable Selection for Partially Linear Varying Coefficient Quantile Regression
1 个回复 - 1318 次查看 【作者(必填)】Du J, Zhang Z, Sun Z. 【文题(必填)】Variable Selection for Partially Linear Varying Coefficient Quantile Regression Model[J]. 【年份(必填)】 International Journal of Biomathematic ...2014-3-1 10:04 - yang2009jing - 文献求助专区
Estimation and variable selection for generalized additive partial linear models
2 个回复 - 1012 次查看 【作者(必填)】 【文题(必填)】Estimation and variable selection for generalized additive partial linear models 【年份(必填)】 【全文链接或数据库名称(选填)】http://projecteuclid.org/DPubS?servi ...2012-12-3 11:15 - guochaohui - 求助成功区
求助,翻译GENERALIZED ADDITIVE PARTIAL LINEAR MODELS FOR CLUSTERED DATA WITH DIV
0 个回复 - 1447 次查看 GENERALIZED ADDITIVE PARTIAL LINEAR MODELS FOR CLUSTERED DATA WITH DIVERGING NUMBER OF COVARIATES USING GEE 这个的中文翻译,求助下2016-4-18 17:04 - tiankaicomcom - Forum
Solving Nonlinear Partial Differential Equations with Maple and Mathematica
4 个回复 - 1098 次查看 Product Details [*]Hardcover: 357 pages [*]Publisher: Springer; 2011 edition (Aug. 4 2011) [*]Language: English [*]ISBN-10: 3709105161 [*]ISBN-13: 978-3709105160 [*]Product Dimensions: 15.6 x ...2015-10-25 10:04 - Nicolle - winbugs及其他软件专版
Randomly weighted LAD-estimation for partially linear errors-in-variables models
1 个回复 - 594 次查看 【作者(必填)】Yang X, Jiang R, Qian W. 【文题(必填)】Randomly weighted LAD-estimation for partially linear errors-in-variables models[J]. 【年份(必填)】Chinese Annals of Mathematics, Series B, ...2015-10-12 17:01 - yang2009jing - 求助成功区
求书:Fundamental Solutions of Linear Partial Differential Operators
1 个回复 - 549 次查看 【作者(必填)】Norbert Ortner, Peter Wagner 【文题(必填)】Fundamental Solutions of Linear Partial Differential Operators 【年份(必填)】2015 【全文链接或数据库名称(选填)】http://www.nitroflare. ...2015-10-7 09:58 - caifacai - 文献求助专区
Efficient statistical inference for partially nonlinear errors-in-variables mode
1 个回复 - 639 次查看 【作者(必填)】Li G R, Zhang J H. 【文题(必填)】Efficient statistical inference for partially nonlinear errors-in-variables models[J]. 【年份(必填)】Acta Mathematica Sinica, English Series, 201 ...2015-10-3 19:38 - yang2009jing - 求助成功区
Estimation in partially linear single-index panel data models with fixed effects
7 个回复 - 1024 次查看 【作者(必填)】Jia Chen, Jiti Gao, Degui Li 【文题(必填)】Supplemental of "Estimation in partially linear single-index panel data models with fixed effects" 【年份(必填)】2013 【全文链接或数据 ...2013-11-13 23:48 - xuqiuhua - 求助成功区
GENERALIZED ADDITIVE PARTIAL LINEAR MODELS FOR CLUSTERED DATA WITH DIVERGING N
2 个回复 - 693 次查看 【作者(必填)】Heng Lian, Hua Liang and Lan Wang 【文题(必填)】GENERALIZED ADDITIVE PARTIAL LINEAR MODELS FOR CLUSTERED DATA WITH DIVERGING NUMBER OF COVARIATES USING GEE 【年份(必填)】 ...2014-12-21 16:37 - gchlj20102 - 求助成功区
求助:Fundamental Solutions of Linear Partial Differential Operators
2 个回复 - 646 次查看 【作者(必填)】Norbert Ortner, Peter Wagner 【文题(必填)】Fundamental Solutions of Linear Partial Differential Operators: Theory and Practice 【年份(必填)】2015 【全文链接或数据库名称(选填)】h ...2015-8-28 15:04 - caifacai - 求助成功区
急用Kernel Smoothing in Partial Linear Models
1 个回复 - 762 次查看 【作者(必填)】Paul Speckman 【文题(必填)】:Kernel Smoothing in Partial Linear Models 【年份(必填)】1988 【全文链接或数据库名称(选填)】http://www.jstor.org/sici?sici=0035-9246(1988)50%3A3%3C413 ...2015-7-22 10:42 - as7641 - 求助成功区
给大家分享一本很有用的书 Partially linear model
1 个回复 - 1047 次查看 partially linear model2015-7-7 20:14 - 圉湢⑨⑴→傑 - 计量经济学与统计软件
线性偏微分方程工具handbbok of linear partial differential equations for engineer
9 个回复 - 1780 次查看 线性偏微分方程工具 Handbbok of linear partial differential equations for engineers and scientists Anderei D.Polyanin.djvu 含有2000多线性偏微分方程,内容十分强大 适合工程师及相关人员参考 ...2014-11-7 22:23 - hylpy1 - 经济金融数学专区
Model averaging for semiparametric additive partial linear models
1 个回复 - 644 次查看 【作者(必填)】Deng G H, Liang H. 【文题(必填)】Model averaging for semiparametric additive partial linear models 【年份(必填)】 Science China Mathematics, 2010, 53(5): 1363-1376. 【全文链接或 ...2015-4-9 10:04 - yang2009jing - 求助成功区
addtive partial linear model 一阶导数作图如何实现?
1 个回复 - 1594 次查看 问题如题。SemiPar给的命令是:plot(fit, drv=1)。但这仅在参数部分全部是连续变量时是对的。我现在遇到的问题是,参数部分包含了时间虚拟变量,用该命令提示出错。不知如何能够达到目的。望各位达人不吝赐教。2014-7-9 20:37 - qinhanqing - R语言论坛
Estimation and model selection in generalized additive partial linear ......
1 个回复 - 808 次查看 【作者(必填)】Wang L, Xue L, Qu A, et al. 【文题(必填)】Estimation and model selection in generalized additive partial linear models for correlated data with diverging number of covariates 的 Supp ...2014-12-8 09:46 - yang2009jing - 求助成功区
Two-step spline estimating equations for generalized additive partially linear m
1 个回复 - 982 次查看 【作者(必填)】Shujie Ma 【文题(必填)】Two-step spline estimating equations for generalized additive partially linear models with large cluster sizes 【年份(必填)】2012 【全文链接或数据库名称(选 ...2014-9-9 15:50 - gchlj20102 - 求助成功区
Group selection in high-dimensional partially linear additive models
1 个回复 - 950 次查看 【作者(必填)】Fengrong Wei 【文题(必填)】Group selection in high-dimensional partially linear additive models 【年份(必填)】2014 【全文链接或数据库名称(选填)】http://projecteuclid.org/euclid.bj ...2014-9-4 10:20 - gchlj20102 - 求助成功区
The relative efficiency of Liu-type estimator in a partially linear model
1 个回复 - 900 次查看 【作者(必填)】Wu J. 【文题(必填)】The relative efficiency of Liu-type estimator in a partially linear model 【年份(必填)】Applied Mathematics and Computation, 2014, 243: 349-357. 【全文链接 ...2014-8-20 16:01 - ly928 - 求助成功区
PARTIALLY LINEAR MODELS
11 个回复 - 3234 次查看 本人是新手,想赚点钱,在此发这本书,希望大家喜欢! CONTENTS PREFACE : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : v 1 INTRODUCTION : : : : : : : : : : : : : : : : : : : : : ...2009-11-8 09:14 - lzm_ - 计量经济学与统计软件
Variable Selection for Partially Linear Varying Coefficient Quantile Regression
1 个回复 - 700 次查看 【作者(必填)】 Du J, Zhang Z, Sun Z. 【文题(必填)】Variable Selection for Partially Linear Varying Coefficient Quantile Regression Model. 【年份(必填)】International Journal of Biomathematics ...2014-5-2 15:48 - yang2009jing - 求助成功区
Estimation in partially linear single-index panel data models with fixed effects
1 个回复 - 753 次查看 【作者(必填)】 Chen J, Gao J, Li D. 【文题(必填)】Estimation in partially linear single-index panel data models with fixed effects[J]. 【年份(必填)】Journal of Business & Economic Statistics, ...2014-4-2 15:49 - yang2009jing - 求助成功区
Estimation in Partially Linear Single-Index Models with Missing Covariates
1 个回复 - 484 次查看 【作者(必填)】 Liu X H, Wang Z Z, Hu X M. 【文题(必填)】Estimation in Partially Linear Single-Index Models with Missing Covariates[J]. 【年份(必填)】Communications in Statistics-Theory and Me ...2014-4-2 16:18 - yang2009jing - 求助成功区
VARIABLE SELECTION FOR PARTIALLY LINEAR VARYING COEFFICIENT QUANTILE REGRESSION
1 个回复 - 676 次查看 【作者(必填)】JIANG DU[/backcolor]College of Applied Sciences, Beijing University of Technology, Beijing 100124, P. R. China[/backcolor] ZHONGZHAN ZHANG[/backcolor]College of Applied Sciences, Beijin ...2014-3-10 16:26 - 一诺9257 - 求助成功区
Kernel smoothing in partial linear models
1 个回复 - 883 次查看 【作者(必填)】Speckman P. 【文题(必填)】 Kernel smoothing in partial linear models[J]. 【年份(必填)】Journal of the Royal Statistical Society. Series B. Methodological, 1988, 50(3): 413-436. ...2014-2-21 09:35 - yang2009jing - 求助成功区
Estimation in partially linear single-index panel data models with fixed effects
1 个回复 - 715 次查看 【作者(必填)】Jia Chen, Jiti Gao, Degui Li 【文题(必填)】Estimation in partially linear single-index panel data models with fixed effects 【年份(必填)】2013 【全文链接或数据库名称(选填)】http:/ ...2013-11-4 22:45 - xuqiuhua - 求助成功区
Additive partial linear models with measurement errors
1 个回复 - 732 次查看 【作者(必填)】Liang H, Thurston S W, Ruppert D, et al. 【文题(必填)】 Additive partial linear models with measurement errors[J]. 【年份(必填)】Biometrika, 2008, 95(3): 667-678. 【全文链接或数 ...2013-11-3 08:53 - yang2009jing - 求助成功区
Robust estimation and variable selection for semiparametric partially linear
1 个回复 - 718 次查看 【作者(必填)】Riquan Zhangab*, Weihua Zhaoac & Jicai Liua 【文题(必填)】Robust estimation and variable selection for semiparametric partially linear varying coefficient model based on modal regress ...2013-10-23 10:11 - ynlihuiqiong - 求助成功区
Quantile Estimation and Variable Selection of Partially Linear Single-index Mode
1 个回复 - 578 次查看 【作者(必填)】Lu Y, Li F, Hu B. 【文题(必填)】Quantile Estimation and Variable Selection of Partially Linear Single-index Models[J]. 【年份(必填)】International Journal of Applied Mathematics ...2013-10-19 09:45 - yang2009jing - 求助成功区
Estimation and variable selection for generalised partially linear single-index
1 个回复 - 849 次查看 【作者(必填)】Lai P, Tian Y, Lian H. 【文题(必填)】 Estimation and variable selection for generalised partially linear single-index models[J] 【年份(必填)】. Journal of Nonparametric Statistics, ...2013-10-9 18:23 - yang2009jing - 求助成功区
Quantile Estimation and Variable Selection of Partially Linear Single-index Mode
0 个回复 - 1243 次查看 【作者(必填)】Lu Y, Li F, Hu B. 【文题(必填)】 Quantile Estimation and Variable Selection of Partially Linear Single-index Models[J]. 【年份(必填)】International Journal of Applied Mathematics ...2013-10-9 18:21 - yang2009jing - 文献求助专区
Variable selection in high-dimensional partially linear additive models for comp
1 个回复 - 1166 次查看 【作者(必填)】 Jie Guoa, , Manlai Tangb, , , Maozai Tiana, , [*]Kai Zhuc, Variable selection in high-dimensional partially linear additive models for composite quantile regression 【文题(必填)】 ...2013-8-24 16:42 - 一诺9257 - 求助成功区
Estimation in Partially Linear Single-Index Panel Data Models with Fixed Effects
1 个回复 - 1179 次查看 【作者(必填)】Chen J, Gao J, Li D. 【文题(必填)】 Estimation in Partially Linear Single-Index Panel Data Models with Fixed Effects Journal of Business & Economic Statistics, 2013 (just-accepted). ...2013-8-19 08:14 - yang2009jing - 求助成功区
Estimation and variable selection in partial linear single index models with
1 个回复 - 731 次查看 【作者(必填)】Zhang J, Wang X, Yu Y, et al. 【文题(必填)】 Estimation and variable selection in partial linear single index models with error-prone linear covariates. Statistics, 2013 (ahead-of-pri ...2013-7-22 11:15 - yang2009jing - 求助成功区
Smoothing Spline Estimation for Partially Linear Single-index Models
1 个回复 - 769 次查看 【作者(必填)】Bartholomew Leunga, Heung Wonga, Riquan Zhangbc* & Shengtong Hanb 【文题(必填)】Smoothing[/backcolor] Spline Estimation for Partially Linear Single-index Models 【年份(必填)】Co ...2013-6-27 15:25 - yang2009jing - 求助成功区
求On inference for partially observed nonlinear diffusion models
1 个回复 - 649 次查看 【作者(必填)】 [*]G. O. Roberts1 and [*]O. Stramer2 【文题(必填)】 On inference for partially observed nonlinear diffusion models using the Metropolis–Hastings algorithm 【年份(必填)】2001 ...2013-6-1 03:37 - 凸集分离定理 - 求助成功区
Penalized spline estimation for partially linear single-index models
1 个回复 - 797 次查看 【作者(必填)】Yu Y, Ruppert D. 【文题(必填)】 Penalized spline estimation for partially linear single-index models 【年份(必填)】Journal of the American Statistical Association, 2002, 97(460): ...2013-5-31 21:52 - yang2009jing - 求助成功区
Penalized spline estimation for partially linear single-index models
6 个回复 - 1555 次查看 【作者(必填)】Yu, Y., & Ruppert, D. 【文题(必填)】Penalized spline estimation for partially linear single-index models 【年份(必填)】Journal of the American Statistical Association, 2002, 97, 10 ...2013-4-29 16:06 - yang2009jing - 求助成功区
Penalized spline estimation for partially linear single-index models
0 个回复 - 887 次查看 【题名】:Penalized spline estimation for partially linear single-index models 【作者】:Yu, Y., & Ruppert, D. 【期刊名,年份,卷(期),页码】:Journal of the American Statistical Association, 97, 1042– ...2013-4-29 15:45 - yang2009jing - 计量经济学与统计软件
Penalized Spline Estimation for Partially Linear Single-Index Models
1 个回复 - 766 次查看 【作者(必填)】Yan Yu and David Ruppert 【文题(必填)】Penalized Spline Estimation for Partially Linear Single-Index Models[/backcolor] 【年份(必填)】2002 【全文链接或数据库名称(选填)】http:// ...2013-4-19 08:59 - gchlj20102 - 求助成功区
Estimation for a partial-linear single-index model
1 个回复 - 652 次查看 【作者(必填)】Jane-Ling Wang, Liugen Xue, Lixing Zhu, and Yun Sam Chong 【文题(必填)】Estimation for a partial-linear single-index model 【年份(必填)】2010 【全文链接或数据库名称(选填)】http: ...2012-12-10 15:10 - guochaohui - 文献求助专区
Estimation for a partial-linear single-index model
1 个回复 - 831 次查看 【作者(必填)】Jane-Ling Wang, Liugen Xue, Lixing Zhu, and Yun Sam Chong 【文题(必填)】Estimation for a partial-linear single-index model 【年份(必填)】2010 【全文链接或数据库名称(选填)】http:// ...2012-12-6 21:50 - guochaohui - 求助成功区
Linear Second-Order Partial Differential Equations of the。。
1 个回复 - 1049 次查看 【作者(必填)】A. M. Ilyin, A. S. Kalashnikov, O. A. Oleynik 【文题(必填)】Linear Second-Order Partial Differential Equations of the Parabolic Type 【年份(必填)】2002 【全文链接或数据库名称(选 ...2012-12-5 11:40 - 352693585 - 求助成功区
Estimation for a partial-linear single-index model
1 个回复 - 870 次查看 【作者(必填)】Jane-Ling Wang, Liugen Xue, Lixing Zhu, and Yun Sam Chong 【文题(必填)】Estimation for a partial-linear single-index model 【年份(必填)】2010 【全文链接或数据库名称(选填)】http: ...2012-12-3 10:39 - guochaohui - 求助成功区
The nonlinear iterative partial least squares approach
0 个回复 - 1000 次查看 【作者(必填)】Wold, Herman 【文题(必填)】Soft modeling by latent variables: The nonlinear iterative partial least squares approach 【年份(必填)】1975 【全文链接或数据库名称(选填)】2012-7-24 09:51 - lily20080606 - 文献求助专区
Distributions and nonlinear partial differential equations
0 个回复 - 2027 次查看 Distributions and nonlinear partial differential equations Number Of Pages: 146Publication Date: 1978Sales Rank: ISBN / ASIN: 3540089519EAN: 9783540089513Binding: Perfect Paperback [此 ...2007-7-14 14:25 - zhushiyou - 计量经济学与统计软件
The Analysis of Linear Partial Differential Operators III
1 个回复 - 2814 次查看 The Analysis of Linear Partial Differential Operators III: Pseudo-Differential Operators (Classics in Mathematics)Publisher:Springer (2007-03) | ISBN-10: 3540499377 | PDF | 7.3 Mb | 525 pagesFrom the ...2007-7-4 13:54 - zhushiyou - 计量经济学与统计软件
想在stata做partial linear model的注意了!
1 个回复 - 2597 次查看 询问stata corp.的人得到的回复: Dear Rex, Unfortunately, the -gplm- command never made it much past the prototype phase that was the subject of that presentation I made about five years ago. As s ...2009-12-11 17:28 - jbx_rex - Stata专版
partially linear models
0 个回复 - 1311 次查看 CONTENTS PREFACE : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : v 1 INTRODUCTION : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1 1.1 Background, History and Practic ...2009-11-8 09:16 - lzm_ - 计量经济学与统计软件
【下载】PARTIALLY LINEAR MODELS
0 个回复 - 1354 次查看 Wolfgang Hardle Institut fur Statistik und Okonometrie Humboldt-Universitat zu Berlin D-10178 Berlin, Germany Hua Liang Department of Statistics Texas A&M University College Station TX 778 ...2009-10-15 20:53 - GARNNET - 计量经济学与统计软件
求Asymptotic theory for partially linear models
0 个回复 - 1670 次查看 哪位能帮忙下载下这篇文章吗? 名字是:Asymptotic theory for partially linear models 下载链接为: http://www.informaworld.com/smpp/content~db=all~content=a780061678 非常的谢谢。2009-9-18 22:39 - limit912 - 文献求助专区