首页 > 最新文献

AFIPS '69 (Spring)最新文献

英文 中文
Applied computer science 应用计算机科学
Pub Date : 1899-12-30 DOI: 10.1145/1476793.1476876
L. Zadeh
It is a truism that we are in the throes of an information revolution of which one obvious manifestation is a very rapid growth in the number of users of computers and computer-like information processing systems.
众所周知,我们正处于信息革命的阵痛之中,其中一个明显的表现是计算机和类似计算机的信息处理系统的用户数量的迅速增长。
{"title":"Applied computer science","authors":"L. Zadeh","doi":"10.1145/1476793.1476876","DOIUrl":"https://doi.org/10.1145/1476793.1476876","url":null,"abstract":"It is a truism that we are in the throes of an information revolution of which one obvious manifestation is a very rapid growth in the number of users of computers and computer-like information processing systems.","PeriodicalId":326625,"journal":{"name":"AFIPS '69 (Spring)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116161331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Measurement based automatic analysis of FORTRAN programs 基于测量的FORTRAN自动分析程序
Pub Date : 1899-12-30 DOI: 10.1145/1476793.1476915
E. C. Russell, G. Estrin
A graph model of computer programs has been developed in a series of studies directed toward improving analysis of the structure of programs executed on different computer configurations. One inherent weakness of the model has been the need for estimates of the mean number of times a program would cycle around its loop structures and estimates of branching probabilities. Extensive improvements were made in the model on the assumption that good estimates would be inserted during a manual transformation of a given program into a computer processable graph representation. The combination of improved tools for measurement of program activities and recently developed analysis programs now permit automatic analysis of source programs. The automatic analysis is based on more reliable measured a priori statistics. This paper discusses a valuable by-product of this measurement and analysis which directs attention toward those parts of a program which are leading candidates for application of optimization techniques. In particular we present an example of the automatic analysis of programs written in the FORTRAN IV language. FORTRAN was selected as a first target for analysis because there exists a large number of time-consuming programs written entirely in FORTRAN.
在一系列旨在改进在不同计算机配置上执行的程序结构分析的研究中,开发了计算机程序的图模型。该模型的一个固有弱点是需要估计程序绕其循环结构循环的平均次数和估计分支概率。在将给定程序手工转换为计算机可处理的图形表示期间,将插入良好的估计,这一假设对模型进行了广泛的改进。改进的测量程序活动的工具和最近开发的分析程序的组合现在允许对源程序进行自动分析。自动分析是基于更可靠的测量先验统计。本文讨论了这种测量和分析的一个有价值的副产品,它将人们的注意力引向了程序中那些最适合应用优化技术的部分。特别地,我们给出了一个用FORTRAN IV语言编写的程序自动分析的例子。之所以选择FORTRAN作为分析的第一个目标,是因为存在大量完全用FORTRAN编写的耗时的程序。
{"title":"Measurement based automatic analysis of FORTRAN programs","authors":"E. C. Russell, G. Estrin","doi":"10.1145/1476793.1476915","DOIUrl":"https://doi.org/10.1145/1476793.1476915","url":null,"abstract":"A graph model of computer programs has been developed in a series of studies directed toward improving analysis of the structure of programs executed on different computer configurations. One inherent weakness of the model has been the need for estimates of the mean number of times a program would cycle around its loop structures and estimates of branching probabilities. Extensive improvements were made in the model on the assumption that good estimates would be inserted during a manual transformation of a given program into a computer processable graph representation. The combination of improved tools for measurement of program activities and recently developed analysis programs now permit automatic analysis of source programs. The automatic analysis is based on more reliable measured a priori statistics. This paper discusses a valuable by-product of this measurement and analysis which directs attention toward those parts of a program which are leading candidates for application of optimization techniques. In particular we present an example of the automatic analysis of programs written in the FORTRAN IV language. FORTRAN was selected as a first target for analysis because there exists a large number of time-consuming programs written entirely in FORTRAN.","PeriodicalId":326625,"journal":{"name":"AFIPS '69 (Spring)","volume":"254 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122638502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
A systematic approach to the development of system programs 开发系统程序的一种系统方法
Pub Date : 1899-12-30 DOI: 10.1145/1476793.1476855
F. Trapnell
The brief history of the development of large programming systems shows a persistent inability to predict cost and time associated with it. For this reason I want to discuss some of the principles and practice which experience (either good or bad) has shown can yield a higher level of predictability. I do not pretend that these principles are always easy to apply or that they do not have to be interpreted to particular situations. However, I do believe that the principles are fundamental in that predictability can be guaranteed to increase if they are followed.
大型编程系统的发展简史表明,一直无法预测与之相关的成本和时间。出于这个原因,我想讨论一些经验(或好或坏)表明可以产生更高水平的可预测性的原则和实践。我并不是说这些原则总是很容易适用,也不是说它们不需要根据具体情况加以解释。然而,我确实相信这些原则是基本的,因为如果遵循这些原则,就可以保证增加可预测性。
{"title":"A systematic approach to the development of system programs","authors":"F. Trapnell","doi":"10.1145/1476793.1476855","DOIUrl":"https://doi.org/10.1145/1476793.1476855","url":null,"abstract":"The brief history of the development of large programming systems shows a persistent inability to predict cost and time associated with it. For this reason I want to discuss some of the principles and practice which experience (either good or bad) has shown can yield a higher level of predictability. I do not pretend that these principles are always easy to apply or that they do not have to be interpreted to particular situations. However, I do believe that the principles are fundamental in that predictability can be guaranteed to increase if they are followed.","PeriodicalId":326625,"journal":{"name":"AFIPS '69 (Spring)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126227343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Interactive tolerance analysis with graphic display 具有图形显示的交互式公差分析
Pub Date : 1899-12-30 DOI: 10.1145/1476793.1476828
L. O'Neill
One of the principal advantages of a dedicated computer with on-line graphic display is that the user is able to quickly and easily interact with the program. The value of this interaction has been clearly demonstrated in the optimization of circuit and system designs. A related task on which interaction can have a significant impact is the investigation of the influence of parameter tolerances on the performance of an optimized design.
具有联机图形显示功能的专用计算机的主要优点之一是用户能够快速方便地与程序进行交互。这种相互作用的价值在电路和系统设计的优化中得到了清楚的证明。研究参数公差对优化设计性能的影响是相互作用可能产生重大影响的一项相关任务。
{"title":"Interactive tolerance analysis with graphic display","authors":"L. O'Neill","doi":"10.1145/1476793.1476828","DOIUrl":"https://doi.org/10.1145/1476793.1476828","url":null,"abstract":"One of the principal advantages of a dedicated computer with on-line graphic display is that the user is able to quickly and easily interact with the program. The value of this interaction has been clearly demonstrated in the optimization of circuit and system designs. A related task on which interaction can have a significant impact is the investigation of the influence of parameter tolerances on the performance of an optimized design.","PeriodicalId":326625,"journal":{"name":"AFIPS '69 (Spring)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127309268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Picture-driven animation Picture-driven动画
Pub Date : 1899-12-30 DOI: 10.1145/1476793.1476838
R. Baecker
"Animation is the graphic art which occurs in time. Whereas a static image (such as a Picasso or a complex graph) may convey complex information through a single picture, animation conveys equivalently complex information through a sequence of images seen in time. It is characteristic of this medium, as opposed to static imagery, that the actual graphical information at any given instant is relatively slight. The source of information for the viewer of animation is implicit in picture change: change in relative position, shape, and dynamics. Therefore, a computer is ideally suited to making animation "possible" through the fluid refinement of these changes."
“动画是发生在时间中的图形艺术。静态图像(如毕加索的作品或复杂的图形)可以通过单个图像传达复杂的信息,而动画通过在时间中看到的一系列图像传达同样复杂的信息。与静态图像相反,这种媒体的特点是,在任何给定时刻,实际的图形信息相对较少。动画观众的信息来源隐含在画面的变化中:相对位置、形状和动态的变化。因此,计算机非常适合通过这些变化的流畅细化来制作动画。
{"title":"Picture-driven animation","authors":"R. Baecker","doi":"10.1145/1476793.1476838","DOIUrl":"https://doi.org/10.1145/1476793.1476838","url":null,"abstract":"\"Animation is the graphic art which occurs in time. Whereas a static image (such as a Picasso or a complex graph) may convey complex information through a single picture, animation conveys equivalently complex information through a sequence of images seen in time. It is characteristic of this medium, as opposed to static imagery, that the actual graphical information at any given instant is relatively slight. The source of information for the viewer of animation is implicit in picture change: change in relative position, shape, and dynamics. Therefore, a computer is ideally suited to making animation \"possible\" through the fluid refinement of these changes.\"","PeriodicalId":326625,"journal":{"name":"AFIPS '69 (Spring)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126369051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 148
Standardization of high-level languages 高级语言的标准化
Pub Date : 1899-12-30 DOI: 10.1145/1476793.1476890
G. Hopper
The terms "compatibility", commonality," and "transferability" are used in discussing the mobility of programs and programmers. The common element essential to such mobility is the establishment of standards for programs, programmers, and documentation. The adoption of high-level programming languages such as COBOL, FORTRAN, ALGOL, and JOVIAL is a required element of such standards. The high-level languages are innately self-documenting---an essential for transferability. Thus, their use provides assistance in the transfer of programs among activities; the conversion from one computer generation to another; the conversion from one computer manufacturer to another; and the transfer of programs for back-up and readiness.
术语“兼容性”、“通用性”和“可移植性”用于讨论程序和程序员的可移动性。这种移动性的基本要素是为程序、程序员和文档建立标准。采用高级编程语言,如COBOL、FORTRAN、ALGOL和JOVIAL,是这些标准的必要元素。高级语言天生具有自文档性——这是可移植性的关键。因此,它们的使用有助于在活动之间转移方案;从一代计算机到另一代计算机的转换;转换:从一个计算机制造商到另一个制造商的转换;以及备用和准备程序的转移。
{"title":"Standardization of high-level languages","authors":"G. Hopper","doi":"10.1145/1476793.1476890","DOIUrl":"https://doi.org/10.1145/1476793.1476890","url":null,"abstract":"The terms \"compatibility\", commonality,\" and \"transferability\" are used in discussing the mobility of programs and programmers. The common element essential to such mobility is the establishment of standards for programs, programmers, and documentation. The adoption of high-level programming languages such as COBOL, FORTRAN, ALGOL, and JOVIAL is a required element of such standards. The high-level languages are innately self-documenting---an essential for transferability. Thus, their use provides assistance in the transfer of programs among activities; the conversion from one computer generation to another; the conversion from one computer manufacturer to another; and the transfer of programs for back-up and readiness.","PeriodicalId":326625,"journal":{"name":"AFIPS '69 (Spring)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130008456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A real-time programming language and its processor for digital control of industrial processes 一种用于工业过程数字控制的实时编程语言及其处理器
Pub Date : 1899-12-30 DOI: 10.1145/1476793.1476933
Liang Liang
The acceptance of digital control for large scale industrial processes, such as chemical, refining, power, and material processing is a step towards total automation and a further improvement in control system performance. Process control oriented programming languages provide a control engineer with means to learn and hence set up, modify, and operate a control system with ease. They eliminate the complication of involving a programmer, who generally has little knowledge about process control engineering. The result is a reduction in time and dollars for digital control system generation.
大规模工业过程(如化工、炼油、电力和材料加工)接受数字控制是迈向全面自动化和进一步改进控制系统性能的一步。面向过程控制的编程语言为控制工程师提供了学习、设置、修改和操作控制系统的方法。它们消除了涉及程序员的复杂性,程序员通常对过程控制工程知之甚少。其结果是减少了数字控制系统生成的时间和费用。
{"title":"A real-time programming language and its processor for digital control of industrial processes","authors":"Liang Liang","doi":"10.1145/1476793.1476933","DOIUrl":"https://doi.org/10.1145/1476793.1476933","url":null,"abstract":"The acceptance of digital control for large scale industrial processes, such as chemical, refining, power, and material processing is a step towards total automation and a further improvement in control system performance. Process control oriented programming languages provide a control engineer with means to learn and hence set up, modify, and operate a control system with ease. They eliminate the complication of involving a programmer, who generally has little knowledge about process control engineering. The result is a reduction in time and dollars for digital control system generation.","PeriodicalId":326625,"journal":{"name":"AFIPS '69 (Spring)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128733212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Montessori techniques applied to programmer training in a workshop environment 蒙台梭利技术在车间环境中应用于程序员培训
Pub Date : 1899-12-30 DOI: 10.1145/1476793.1476849
E. R. Alexander
This paper describes a unique workshop structure based on the Montessori Method and utilizing both vertical and horizontal interaction in the training of systems programmers.
本文描述了一个独特的工作坊结构,基于蒙台梭利方法,利用垂直和水平的互动来培训系统程序员。
{"title":"Montessori techniques applied to programmer training in a workshop environment","authors":"E. R. Alexander","doi":"10.1145/1476793.1476849","DOIUrl":"https://doi.org/10.1145/1476793.1476849","url":null,"abstract":"This paper describes a unique workshop structure based on the Montessori Method and utilizing both vertical and horizontal interaction in the training of systems programmers.","PeriodicalId":326625,"journal":{"name":"AFIPS '69 (Spring)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128725102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Virtual memory management in a paging environment 分页环境中的虚拟内存管理
Pub Date : 1899-12-30 DOI: 10.1145/1476793.1476834
N. Weizer, G. Oppenheimer
The Spectra 70/46 Time Sharing Operating System (TSOS) is designed to be a combined time-sharing and multiprogramming system that will support up to 48 conversational users or a combined total of 64 batch and interactive tasks processing simultaneously.
频谱70/46分时操作系统(TSOS)被设计成一个分时和多程序系统,将支持多达48个会话用户或同时处理64个批处理和交互式任务。
{"title":"Virtual memory management in a paging environment","authors":"N. Weizer, G. Oppenheimer","doi":"10.1145/1476793.1476834","DOIUrl":"https://doi.org/10.1145/1476793.1476834","url":null,"abstract":"The Spectra 70/46 Time Sharing Operating System (TSOS) is designed to be a combined time-sharing and multiprogramming system that will support up to 48 conversational users or a combined total of 64 batch and interactive tasks processing simultaneously.","PeriodicalId":326625,"journal":{"name":"AFIPS '69 (Spring)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129350506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 20
Some logical and numerical aspects of pattern recognition and artificial intelligence 模式识别和人工智能的一些逻辑和数值方面
Pub Date : 1899-12-30 DOI: 10.1145/1476793.1476818
W. Clark Naylor
Artificial Intelligence has received the attentions and contributions of workers in many varied disciplines and of many varied interests. As a result there has arisen a large and diverse body of research literature in the field. The task of sorting out and comparing some threads of continuity through this rich and variegated tapestry presents a tempting prospect.
人工智能已经受到许多不同学科和不同兴趣的工作者的关注和贡献。因此,在该领域出现了大量不同的研究文献。在这幅丰富多彩的挂毯中梳理和比较一些连续性线索的任务呈现出诱人的前景。
{"title":"Some logical and numerical aspects of pattern recognition and artificial intelligence","authors":"W. Clark Naylor","doi":"10.1145/1476793.1476818","DOIUrl":"https://doi.org/10.1145/1476793.1476818","url":null,"abstract":"Artificial Intelligence has received the attentions and contributions of workers in many varied disciplines and of many varied interests. As a result there has arisen a large and diverse body of research literature in the field. The task of sorting out and comparing some threads of continuity through this rich and variegated tapestry presents a tempting prospect.","PeriodicalId":326625,"journal":{"name":"AFIPS '69 (Spring)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127532057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
期刊
AFIPS '69 (Spring)
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1