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source：http://www.mathfinance.cn/free-historical-intra-daily-data/ The last decade we have seen a significant increase in the demand for high frequency data. This is explained for a large part by an increased attention of the academic world in algoritmic trading. Moreover, as lot of papers suggest, the profitability has been shifted to an intra-daily format. In this segment, speed is what counts. For instance, Scholtus and Van Dijk (2012) state that strategies that yield a positive return when they experience no delay, a delay of 200 milliseconds is enough to lower their performance significanlty. Given the competition on the market from large institutions, such as JP Morgan and Morgan Stanley, a private investor has always a competative disadvantage due to its lack of the required technology. Nevertheless, there is always room for improvement in the modelling of stochastic intra-daily processes such as the VWAP and daily volatility . A key ingredient in these research areas is proper and clean (historical and up-to-date) intra-daily data. On the web there are various resources available, but most of them require a relatively high fee. Other solutions require the use of a specific software. However, there are ways to retrieve intra-daily data for free using Google Finance and also without any software. Using Matlab If you are familiar with MatLab you can use parts of the package ' Volume Weighted Average Price from Intra-Daily Data ' by Semin Ibisevic referenced at Qoppa Investment Society. This package allows you to (1) retrieve intra-daily stock price data from Google Finance; (2) calculate the VWAP at the end of each trading day; and (3) transform intra-daily data to a daily format. It is a relatively flexible function as it only requires the user to input the ticker symbol and the exchange where the security is listed on. Additionally, the user can define the frequency of the data (1 second or higher) and the period (for instance past 10 days). Without software If you don't have Matlab you can replicate parts of the code manually. The package above connects with Google Finance and downloads a spreadsheet of intra-daily data consisting of the prices high, open, low, close and volume from: Google Finance get price 1 . You can adjust this to your own preferences by 'seeing' the address as: Google Finance get price 2 , where TICKER refers to the ticker symbol of the security at Google Finance; EXCHANGE is where the security is listed on; Hint: to track these inputs, for instance for the Dow Jones Industrial Average, you search the security of interest at Google Finance and then you can find at the top: (INDEXDJX:.DJI) which obviously refers to (EXCHANGE:TICKER). INTERVAL defines the frequency (60 = 60 seconds). PERIOD is the historical data period (see also Google Finance), here 10d refers to the past 10 days (up to current time). In a world with increasing competition, such solutions are an handy tool to easier the life of a researcher. References Scholtus, Martin L. and Van Dijk, Dick J. C., High-Frequency Technical Trading: The Importance of Speed (February 28, 2012). Tinbergen Institute Discussion Paper 12-018/4. Available at SSRN: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2013789 . Ibisevic, Semin. Volume Weighted Average Price from Intra-Daily Data, 2012, MatLab File Exchange. Available online at: http://www.mathworks.com/matlabcentral/fileexchange/36115-volume-weighted-average-price-from-intra-daily-data .
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2011年4月20日的电脑世界沙龙上，介绍了22款免费的数据分析相关工具，他们有关于数据清洗的、有关于数据展现的还有关于数据分析的;他们或是来自IBM，谷歌。雅虎这样的互联网企业，或是出自麻省理工，斯坦福这样的高校，有在线的也有离线的。如果你正为一些地理分析图片而赶到焦虑，或是为做不出漂亮的社交网络关系图而烦恼，或许下面这些工具可以帮到你。 数据清理类工具 DataWrangler Google Refine 统计分析类工具 The R Project for Statistical Computing TimeFlow 数据展现类工具 Google Fusion Tables Impure Tableau Public Many Eyes VIDI Zoho Reports 代码帮助类工具 Choosel Exhibit 地图相关数据展示工具 Quantum GIS (QGIS) OpenHeatMap OpenLayers 文本类相关处理工具 IBM Word-Cloud Generator 社交网络类工具 Gephi NodeXL
荷兰科学计量学家免费提供中文共词分析软件 武夷山 2008 年第 9 期的 JASIST 杂志上，荷兰著名科学计量学家、普赖斯奖得主 Loet Leydesdorff 教授 和中国科学技术信息研究所的周萍研究员共同发表论文，《采用中文字符集进行共词分析》，论文全文和他开发的软件在他的个人网站上都可下载： Loet Leydesdorff Ping Zhou, Co-Word Analysis using the Chinese Character Set , Journal of the American Society for Information Science and Technology 59(9), 1528-1530, 2008; pdf-version ; software 最近，应一位中国朋友的请求，他对采用中文字符集绘制语义图谱的软件进行了升级，感兴趣者可点击以下链接进行下载： the programs for semantic mapping using Chinese characters at http://www.leydesdorff.net/software/chinese for more recent versions of Windows and 64-bits machines. 感谢 Loet Leydesdorff 教授的慷慨分享！
你一定很熟悉这样的电视广告词：“我们的价钱是29.99元。而且如果你现在就打电话，你还能得到xxxx，免费！” “免费”，可能是用得最多的广告词了。不知你有没有想过，“免费”到底有多大吸引力？顾客付一笔钱得到两样东西，把其中一样算成“免费”有什么意义？ 事实上，“免费”的魔力还真不小。当亚马逊书店(Amazon)推出消费超过25美元就有“免费”运送的服务后，销售量大大增加。很多顾客为了凑足25美元消费额而购买额外的物品。但在法国，却是一切静悄悄。原来，由于疏忽，那里的运送不是免费而是1法郎（相当于10美分）。10美分有那么重要吗？不是。重要的是“免费”两个字！ “免费”效应甚至可以用简单的实验来证明。让受试者在以下三者中选一：花26美分买一种本来值很贵的巧克力；花1美分买一种本来较便宜的巧克力；或者什么都不买。然后，把两者的价钱各降一分，变成25美分和“免费”。在后一种情况下，选择第二种（即免费的）巧克力的人大大增多，而选择较贵的巧克力的人大大减少。其实，两种选择的得失比较并没有变化很大。但人们的反应，却因为“免费”而大不相同。这种情况其实相当普遍。用实物交换，也是如此。用纯粹钱的交换（花钱买代价劵），也是如此。买更昂贵的东西如几百块的电视机，也是如此。去掉“什么都不买”的选项，也还是如此。甚至对鬼节出来讨糖的小孩子做实验，结果也一样。 当然，这个结果有很多可能的原因。也许“免费”不仅省了1美分，而且省去了掏钱，找钱的麻烦？也许人们不是看减价的绝对值，而是看减价的幅度？也许“免费”让人们觉得特别安全，绝对不会吃亏？也许不涉及钱使得人们对物品的感受不同？这些理由有的是理性的，其余是以前研究过的非理性反应。可是这些可能性都被其他实验否定了。而被一个问卷实验所证实的可能是：人们对于“免费”有一种非理性的特殊的感受。 其实，我们都知道真正的“免费”是没有的。很多“免费”的条件是购买其他物品。有时为了得到“免费”的东西要花很多时间来填表或排队。在上面讲到的实验中，“免费”的代价是“机会”。为了得到免费的便宜，人们放弃了另一个便宜。所以，免费并不是没有风险，绝对合算的。然而，人们对“免费”还是趋之若鹜。 有没有办法消解“免费”的咒语呢？上面说的问卷实验其实提供了一个办法。在这个实验中，受试者在作出决定前先要回答一个问卷，表明他们对拥有昂贵的巧克力的倾向有多少，和对少花钱的倾向有多少。然后，他们再选要不要免费的巧克力。结果，在巧克力要1美分和免费的情况下，选择的结果就没什么差别了。这说明，我们把所有得益放在一起考虑，把所有花费放在一起考虑，就不会被“免费”两个字一叶障目了。 话说回来，商家提供的免费也不都是骗局。很多时候一点小恩小惠会给人带来很温謦的感觉。小时候到摊头上买鱼，摊主总会加上一把葱姜，让我觉得很体贴。中国餐馆往往饭后会送上一碗甜汤或一碟水果，带来一个完美的句号。上次买新车时，车行特地给车加满了油，让我更有心满意足的体验。这些都是很小的钱数，而且是在交易以后提供的。但不知不觉，就给双方的关系带来一点亮色。这时如果哪一方提出要给钱，那就是很煞风景的事了。在人际关系的层面上，“免费”是不是也有着特别的魔力呢？那就是另一篇文章的内容了（见篇末介绍的“千里送鹅毛的心理学”）。 【注】本文参照了以下文章：K. Shampanier, N. Mazar and D. Ariely, “Zero as a Special Price: The True Value of Free Products”, Marketing Science, Vol. 26, No. 6 (2007), pp. 742-757。 有关博文 诡异的数字暗示：参照效应 http://www.sciencenet.cn/m/user_content.aspx?id=310533 心态是衡量快乐的一杆秤 http://www.sciencenet.cn/m/user_content.aspx?id=363851 从“破釜沉舟”谈起 http://www.sciencenet.cn/m/user_content.aspx?id=266839 “诱饵效应”和“心理相对论” http://www.sciencenet.cn/m/user_content.aspx?id=285750 千里送鹅毛的心理学 http://blog.sciencenet.cn/blog-309766-665790.html
AIP（美国物理联合会）物理学史中心推出免费的在线展览作品——原子核之父：卢瑟福 请点击链接： http://www.aip.org/history/exhibits/rutherford/ AIP’s Center for History of Physics Opens New Web Exhibit on Ernest Rutherford, Discoverer of the Atomic Nucleus
Elevation models from SRTM now available for download free of charge 25 May 2011 Representations of SRTM data 16.26 MB Share Information 1 / 3 When Space Shuttle Endeavour launched on 11 February 2000 for the 'Shuttle Radar Topography Mission' (SRTM), it was carrying two radar antennas; one in the shuttle's payload bay and the other on the end of a 60-metre mast. Over the course of eleven days, researchers at the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) acquired data for a three-dimensional terrain model of large areas of the Earth. Now, DLR is making these data available for scientific purposes via EOWEB , free of charge. The SRTM structure was one-of-a-kind; the mast, which was deployed from the loading bay of the Shuttle during flight, was the longest man-made structure in space at that time. During the course of its orbit around the Earth, the payload antenna transmitted radar signals earthwards, and both antennas received radar signal reflections. The radar images provided a representation of Earth's surface viewed from two different positions, enabling researchers at DLR's German Remote Sensing Data Center (Deutsches Fernerkundungsdatenzentrum; DFD) to derive a precise Digital Elevation Model (DEM) of the surface of the Earth. "For the first time ever, we had a dataset characterised by uniform quality around the globe," stated DFD Director Stefan Dech. By the time Endeavour returned to Kennedy Space Center on 22 February 2000, DLR had obtained high-precision mapping data for more than 113 million square kilometres of the Earth from an altitude of about 230 kilometres – forming the basis for what became known as the 'Map of the 21st Century'. During the mission, the radars allowed researchers to obtain elevation data regardless of the time of day and weather conditions. The flight path of Endeavour dictated the areas imaged by the radars; the SRTM data covered regions with latitudes between 60 degrees north and about 60 degrees south – the polar regions were inaccessible. While NASA used a C-band radar to record the entire accessible land surface of Earth with an altitude precision of plus or minus ten metres, DLR used an X-band radar to cover a smaller area, but with a precision of plus or minus six metres. "The accuracy of these global elevation models has yet to be surpassed," said Dech. This explains why, eleven years later, many researchers are still using these datasets. The SRTM was not just a milestone in terms of high-precision mapping of the Earth from space; it was also the precursor to and a test for the current TanDEM-X mission, which involves two identical German radar satellites orbiting Earth in formation to record a comprehensive and even more precise DEM that is scheduled for completion in 2013. The X-band DEMs from the SRTM mission have resolution of one arcsecond, corresponding to a pixel size of 25 metres at central latitudes. Each DEM covers an area of 2.5 by 2.5 degrees and is composed of 'tiles', each measuring 15 arcminutes by 15 arcminutes (900 by 900 data points). They can be downloaded free of charge by registering with EOWEB. Registered users can download these datasets from an FTP server. SRTM data can be incorporated directly into digital maps or geographical information systems by means of a standardised Web Map Service (WMS). Twitter Facebook Google+ Favourite Printer-friendly version Send to a friend Last modified: 31/05/2011 11:00:07 Contacts Manuela Braun German Aerospace Center (DLR) Media Relations Section Tel.: +49 2203 601-3882 Fax: +49 2203 601-3249 Prof. Dr Stefan Dech German Aerospace Center (DLR) Earth Observation Center (EOC) - German Remote Sensing Data Center Tel.: +49 8153 28-2885 Fax: +49 8153 28-3444 Dr.rer.nat Hans-Joachim Lotz-Iwen German Aerospace Center (DLR) German Remote Sensing Data Center, Science Communication and Visualization Tel.: +49 8153 28-1373 Fax: +49 8153 28-1313
虽然免费的杀毒软件已经越来越多，但开源的的杀毒软件，仍然很少；而ClamAV则是从开始到现在，一直坚持着免费开源的路线。这款杀毒软件免费、开源、支持Windows、Linux、FreeBSD等多种操作系统。软件官方网址： http://www.clamav.net/ 和一般鼠标操作的杀毒软件不同，ClamAV对命令行支持较好；目前针对Windows用户的操作习惯，还出品了Immunet 3.0版本。 部分英文介绍： ClamAV is an open source (GPL) antivirus engine designed for detecting Trojans, viruses, malware and other malicious threats. It is the de facto standard for mail gateway scanning. It provides a high performance mutli-threaded scanning daemon, command line utilities for on demand file scanning, and an intelligent tool for automatic signature updates. The core ClamAV library provides numerous file format detection mechanisms, file unpacking support, archive support, and multiple signature languages for detecting threats. The core ClamAV library is utilized in Immunet 3.0, powered by ClamAV, which is a fast, fully featured Desktop AV solution for Windows. =============================关于博主============================= 博主的主要兴趣是：知识管理；相关兴趣有：语义网、机电及DIY、哲学与心理、信息安全、科幻等。 我的常用博客在科学网 （访问可点链接，下同）； 新浪微博是@outcrop ，欢迎互粉；建了一个超级QQ群：17662971，希望能闲聊无白丁，欢迎加入；自己打理着一个 机电工程师 小网站，欢迎来玩。最近在科学网关注“ 科学网大学 ”，欢迎加入 科学网大学群组 讨论、尝试。
7 Free Education Websites You Don't Want to Miss Jun 7, 2012 1. COURSERA WHAT Coursera strives to make education accessible to anyone. HOW Free courses online from world-class universities, including Princeton University and the University of Michigan. The topics are varied, and lectures are formatted into series of 15-minute-long clips. BONUS POINTS Freedom is the name of the game: students can watch videos at their convenience and in their own time. 2. UDACITY WHAT A free education website for brainy types, founded by four Stanford roboticists. HOW Udacity currently offers 11 courses , all of which are in science and math-related topics. According to the website, plans are underway to expand the curriculum. BONUS POINTS Udacity is free of deadlines, free of prerequisites, free of quizzes and other annoying school stuff. Needless to say, courses are also free of charge. 3. OPEN CULTURE WHAT High-quality cultural and educational media. HOW A staggering collection of 400 courses, online, for free, from Ivy League universities, such as Stanford, UCLA, Columbia and Oxford University. Courses run the gamut from science and art to math and economics. BONUS POINTS Classic and indie films , including many from the 1940’s and 1950’s, are available to watch for free. 4. TED-ED WHAT TED , The powerhouse of jaw-dropping lectures needs no introduction. Now, they’re bringing their talent into education with an offshoot, Ted-Ed. HOW A treasure trove of beautifully animated and gripping videos on a wide array of subjects, such as The Power of Simple Words and How Many Universes are There . All videos are under 10-minutes-long. BONUS POINTS Supplemental materials such as quizzes and discussion questions are also available. 5. MENTORMOB WHAT Curating and ordering learning materials. HOW MentorMob is like the YouTube of learning materials: users create learning “playlists” from first-rate websites. BONUS POINTS MentorMob is a community, whose members share and rank each others’ learning playlists. 6. MEMRISE WHAT Effortless learning based on three pillars: science, fun and community. HOW Based on scientific methods for implanting new information, Memrise proves that what may seem impossible is in fact doable - yes, even learning Mandarin Chinese. BONUS POINTS The Guardian Wallcharts are mapped Memrise style, teaching you all about cheeses, herbs and other wonders of life. 7. LEARNIST WHAT Learnist is the Pinterest of learning. HOW The interactive platform allows users collect teaching materials and educational content that are grouped into "boards". BONUS POINTS The platform is equipped with the Learn it! bookmarklet, which enables picking images anywhere on the web and automatically shoots them to your Learnist board.
Landsat 5 面临退役 多年来Landsat 系列卫星一直是全世界遥感研究人员，免费获得遥感数据的首选数据源；甚至是2012年从USGS都可以免费下载或免费订购Landsat的存库或未存库数据，未存库数据获得只需要几天或一周就可以获得，速度远远高于国产卫星，甚至可以免费订购到历史有云损的遥感数据；服务速度和质量极优！！为Landsat 5 面临退役而感到遗憾。。。 2011年11月18日，美国地质调查局（USGS）发布消息称由于卫星上的放大器迅速老化，目前已停止获取Landsat-5的卫星遥感影像，这意味着Landsat-5极有可能结束其使命。 Landsat 5 Mission in Jeopardy Released: 11/18/2011 9:32:01 AM Contact Information: U.S. Department of the Interior, U.S. Geological Survey Office of Communications and Publishing 12201 Sunrise Valley Dr, MS 119 Reston, VA 20192 The U.S. Geological Survey (USGS) has stopped acquiring images from the 27-year-old Landsat 5 Earth observation satellite due to a rapidly degrading electronic component. Landsat 5 was launched in 1984 and designed to last 3 years. The USGS assumed operation of Landsat 5 in 2001 and managed to bring the aging satellite back from the brink of total failure on several occasions following the malfunction of key subsystems. There is now an increasing likelihood that the Landsat 5 mission is nearing its end. “This anticipated decline of Landsat 5 provides confirmation of the importance of the timely launch of the next Landsat mission and the need for an operational and reliable National Land Imaging System,” stated Anne Castle, Assistant Secretary for Water and Science at the U.S. Department of the Interior. “The USGS is committed to maintaining the unique long term imaging database that the Landsat program provides.” For several months, the Landsat flight operations team has been closely tracking the fluctuating performance of an amplifier essential for transmitting land-surface images from the Landsat 5 satellite to ground receiving stations in the U.S. and around the world. Over the past 10 days, problems with the amplifier have led to drastically reduced image download capabilities, a sign of impending failure. Numerous engineering and technical adjustments have been made to Landsat 5 in the past several days to sustain at least a limited imaging capability, but performance has continued to decline. Instead of continuing to operate until the amplifier fails completely, which could bring the mission to an end, USGS engineers have suspended imaging activities for an initial period of 90 days in order to explore every possible option for restoring satellite-to-ground image transmissions. The USGS-operated Landsat 7 remains in orbit collecting global imagery. Since its launch in 1999 with a 5-year design life, Landsat 7 has experienced an instrument anomaly which reduces the amount of data collected per image. Landsat 8, currently called the Landsat Data Continuity Mission, is now scheduled to be launched in January 2013.
收到主编Murugan Ramalingam的邮件： Articles that have been published in the Journal of Biomaterials and Tissue Engineering are now available for free download with effect from today, December 08, 2011. 到 http://www.aspbs.com/jbt.html 试了下，果然免费。 我下载了杂志的2个介绍材料，供感兴趣的朋友参考。 WelcometotheJournalofBiomaterialsandTissueEngineering.pdf preface.pdf （这个是各个洲的一些编委的致辞）
今天又看到了基于amazon开发的生物信息软件（ http://bioinformatics.oxfordjournals.org/content/early/2011/11/13/bioinformatics.btr630.abstract?etoc ），联想到之前看到的一个新闻 :Eagle Genomics to Offer John Innes Centre's SNP-Analysis Software via Service Model .感到新的软件售卖模式就业来临了。这就是，云端软件免费使用，但是软件使用者却要向云服务商购买计算资源，而云服务商通过计算软件的使用时间给软件开发者付费。 Eagle Genomics to Offer John Innes Centre's SNP-Analysis Software via Serv.doc
在 SCImago 期刊和国家（或地区）排序（ SCImago Journal Rank ）中，期刊刊名包括“UNIVERSITY”的共计有14 4种，其中有81种中国高校学报，另外还有一种学院学报（ Journal of the Hong Kong College of Radiologists ），总计82种，这些期刊的多项评价指标均可以免费查阅或者与其他期刊进行对比。144种期刊的分布以及82种中国高校学报名录如下： Country University Journal Country University Journal United States 24 Czech Republic 1 China 82 Japan 10 Turkey 4 United Kingdom 2 Nepal 1 Germany 1 Australia 2 Puerto Rico 1 Bangladesh 1 Iran 3 Pakistan 1 Spain 1 Canada 2 Malaysia 1 Romania 1 Thailand 1 Ireland 1 Saudi Arabia 3 Russian Federation 1 Total 144 1. Journal of the Hong Kong College of Radiologists . China. 2. Journal of Zhejiang University . Science. B. . China. 3. Qinghua Daxue Xuebao/Journal of Tsinghua University . China. 4. Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University . China. 5. Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology . China. 6. Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences . China. 7. Tongji Daxue Xuebao/Journal of Tongji University . China. 8. Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science Edition . China. 9. Dalian Ligong Daxue Xuebao/Journal of Dalian University of Technology . China. 10. Journal of Central South University of Technology (English Edition) . China. 11. Journal of Huazhong University of Science and Technology - Medical Science . China. 12. Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University . China. 13. Wuhan Daxue Xuebao (Xinxi Kexue Ban)/Geomatics and Information Science of Wuhan University . China. 14. Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics . China. 15. Beijing Youdian Xueyuan Xuebao/Journal of Beijing University of Posts And Telecommunications . China. 16. Dongbei Daxue Xuebao/Journal of Northeastern University . China. 17. Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) . China. 18. Journal of China Pharmaceutical University . China. 19. Journal of Zhejiang University : Science A . China. 20. Nan fang yi ke da xue xue bao = Journal of Southern Medical University . China. 21. Sichuan Daxue Xuebao (Gongcheng Kexue Ban)/Journal of Sichuan University (Engineering Science Edition) . China. 22. Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University . China. 23. Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) . China. 24. Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing . China. 25. Chang'an Daxue Xuebao (Ziran Kexue Ban)/Journal of Chang'an University (Natural Science Edition) . China. 26. Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) . China. 27. Jiangsu Daxue Xuebao (Ziran Kexue Ban) / Journal of Jiangsu University (Natural Science Edition) . China. 28. Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) . China. 29. Journal of Sichuan University (Medical Science Edition) . China. 30. Journal of Southeast University (English Edition) . China. 31. Nanjing Hangkong Hangtian Daxue Xuebao/Journal of Nanjing University of Aeronautics and Astronautics . China. 32. Wuhan University Journal of Natural Sciences . China. 33. Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University . China. 34. Beijing Linye Daxue Xuebao/Journal of Beijing Forestry University . China. 35. Dianzi Keji Daxue Xuebao/Journal of the University of Electronic Science and Technology of China . China. 36. Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University . China. 37. Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) . China. 38. Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences . China. 39. Journal of Central South University (Medical Sciences) . China. 40. Journal Wuhan University of Technology, Materials Science Edition . China. 41. Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology . China. 42. Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University . China. 43. Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) . China. 44. Chongqing Jianzhu Daxue Xuebao/Journal of Chongqing Jianzhu University . China. 45. Guofang Keji Daxue Xuebao/Journal of National University of Defense Technology . China. 46. Huadong Ligong Daxue Xuebao /Journal of East China University of Science and Technology . China. 47. Journal of China University of Geosciences . China. 48. Journal of Shanghai Jiaotong University (Science) . China. 49. Liaoning Gongcheng Jishu Daxue Xuebao (Ziran Kexue Ban)/Journal of Liaoning Technical University (Natural Science Edition) . China. 50. Transactions of Nanjing University of Aeronautics and Astronautics . China. 51. Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) . China. 52. Beijing Gongye Daxue Xuebao / Journal of Beijing University of Technology . China. 53. Beijing Huagong Daxue Xuebao (Ziran Kexueban)/Journal of Beijing University of Chemical Technology (Natural Science Edition) . China. 54. Beijing Jiaotong Daxue Xuebao/Journal of Beijing Jiaotong University . China. 55. Journal of Chengdu University of Technology (Science and Technology Edition) . China. 56. Journal of Dong Hua University (English Edition) . China. 57. Journal of Shanghai University . China. 58. Nanjing Li Gong Daxue Xuebao/Journal of Nanjing University of Science and Technology . China. 59. Transactions of Tianjin University . China. 60. Zhejiang da xue xue bao. Yi xue ban = Journal of Zhejiang University . Medical sciences . China. 61. Academic Journal of Second Military Medical University . China. 62. Dalian Haishi Daxue Xuebao/Journal of Dalian Maritime University . China. 63. Fudan University Journal of Medical Sciences . China. 64. Journal of Ocean University of China . China. 65. Shanghai Ligong Daxue Xuebao/Journal of University of Shanghai for Science and Technology . China. 66. Shenyang Jianzhu Daxue Xuebao (Ziran Kexue Ban)/Journal of Shenyang Jianzhu University (Natural Science) . China. 67. Shenzhen Daxue Xuebao (Ligong Ban)/Journal of Shenzhen University Science and Engineering . China. 68. Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture Technology . China. 69. Academic Journal of Xi'an Jiaotong University . China. 70. Chongqing Daxue Xuebao/Journal of Chongqing University . China. 71. Jiefangjun Ligong Daxue Xuebao/Journal of PLA University of Science and Technology (Natural Science Edition) . China. 72. Journal of Tianjin Polytechnic University . China. 73. Nanjing Youdian Daxue Xuebao (Ziran Kexue Ban)/Journal of Nanjing University ofPosts and Telecommunications (Natural Science) . China. 74. Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology . China. 75. Zhongbei Daxue Xuebao (Ziran Kexue Ban)/Journal of North University of China (Natural Science Edition) . China. 76. Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) . China. 77. Journal of Dalian Medical University . China. 78. Journal of Jilin University Medicine Edition . China. 79. Journal of Zhejiang University : Science C . China. 80. Medical Journal of Wuhan University . China. 81. Journal of Nanjing Medical University . China. 82. Journal of Shanghai Jiaotong University (Medical Science) . China.
免费的 Pine Lake 游泳场所 黄安年文 黄安年的博客 /2011 年 9 月 11 日发布 在华盛顿州 Sammamish 县的 Pine Lake 也是天然的游泳场所 , 不分男女老少和着装 , 都可以在 Pine Lake 自由游泳 , 人和自然的和谐在这里的得到了历史和社会的延续 . 这里的管理和经费是由所在社区居民投票决定的。在 Pine Lake 游泳场所的旁边有座珍贵的红松林 , 又有公共的体育和健身场所，所以成为附近居民喜爱的活动场所。 照片 14 张是即时拍摄的。
今天看报说格拉斯哥大学出新招，许诺将学校所有科研IP无偿转让（由公司资助的除外），由此引发不少争议。但是我感到他们的用意在于竞争。因为如果过分纠缠于IP转让过程中的细则，就可能丧失开发机会格拉斯哥此举意在增加自己的竞争力，可谓用心良苦。 原文详见金融时报： University leads way with free research http://www.ft.com/cms/s/0/a76de06c-fb2a-11df-b576-00144feab49a.html#axzz16fimPyct
免费期刊信息分析平台： http://www.scimagojr.com/aboutus.php 分析内容和方法可以参考博主的相关分析报告 The SCImago Journal Country Rank is a portal that includes the journals and country scientific indicators developed from the information contained in the Scopus database ( Elsevier B.V. ). These indicators can be used to assess and analyze scientific domains. This platform takes its name from the SCImago Journal Rank (SJR) indicator , developed by SCImago from the widely known algorithm Google PageRank . This indicator shows the visibility of the journals contained in the Scopus database from 1996. SCImago is a research group from the Consejo Superior de Investigaciones Cientficas (CSIC), University of Granada, Extremadura, Carlos III (Madrid) and Alcal de Henares, dedicated to information analysis, representation and retrieval by means of visualisation techniques. As well as SJR Portal, SCImago has developed The Atlas of Science project , which proposes the creation of an information system whose major aim is to achieve a graphic representation of IberoAmerican Science Research. Such representation is conceived as a collection of interactive maps, allowing navigation functions throughout the semantic spaces formed by the maps. Contact e-mail : scimagojr@scimago.es
5所国外著名大学免费全文资源 https://dspace.ucalgary.ca/handle/1880/374 http://dspace.library.cornell.edu/index.jsp cornell university http://dspace.anu.edu.au/ national university https://dspace.gla.ac.uk/index.jsp University of Glasgow http://www.dspace.cam.ac.uk/handle/1810/31316 Cambridge university http://www.doaj.org/doaj?func=subjectcpid=20 http://www.doaj.org/doaj?func=subjectcpid=67
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