Scaling of cities With urban population increasing dramatically worldwide, cities are playing an increasingly critical role in human societies and the sustainability of the planet. An obstacle to effective policy is the lack of meaningful urban metrics based on a quantitative understanding of cities. Typically, linear per capita indicators are used to characterize and rank cities. 1.15). Figures Citation: Bettencourt LMA, Lobo J, Strumsky D, West GB (2010) Urban Scaling and Its Deviations: Revealing the Structure of Wealth, Innovation and Crime across Cities. Editor: Juan A. Received: May 18, 2010; Accepted: September 16, 2010; Published: November 10, 2010 Copyright: © 2010 Bettencourt et al. Funding: This work was partially supported by a James S. Competing interests: The authors have declared that no competing interests exist. Introduction How rich, creative or safe can we expect a city to be? The use of per capita indicators assumes implicitly that, on average, specific urban characteristics, . Results .
怎样化杂为简 Download Download NeuroSolutions Products Most software companies do not allow you try out their programs before you buy them. They may give you a flashy slide show for free, but not a working evaluation copy of the software. We on the other hand provide you with working copies of NeuroSolutions products that will allow you to design, train and test a neural network with your own data. Our Neurosolutions download includes NeuroSolutions, NeuroSolutions for Excel, NeuroSolutions Accelerator* and Custom Solution Wizard. "I have recently purchased a copy of NeuroSolutions 4 and am very happy with the software.
Decision and Information Sciences - CEEESA Decision Analysis Tools The Center for Energy, Environmental, and Economic Systems Analysis (CEEESA) provides decision analysis tools that cover a wide range of issues. The table below summarizes the available models. Click on each model name to get more information. Decision Analysis Model (DAM) DAM was developed to aid decision analysts in solving multiple-criteria decision analysis problems. For more information about the Decision Analysis Model (DAM), contact CEEESA. Interactive Decision Analysis (IDEA) IDEA is a PC-based software package used for a wide variety of decision problems. For more information about Interactive Decision Analysis (IDEA), contact CEEESA. Portfolio Analysis Support System (PASS) PASS helps users effectively allocate limited resources — funds, personnel, and facilities — by better understanding the pros and cons of different proposals. For more information about Portfolio Analysis Support System (PASS), contact CEEESA. Argonne Risk Allocation Model (ARAM)
社會網路分析 出自 MBA智库百科( 社會網路分析(Social Network Analysis) 社會網路分析方法是由社會學家根據數學方法﹑圖論等發展起來的定量分析方法，近年來，該方法在職業流動、城市化對個體幸福的影響、世界政治和經濟體系、國際貿易等領域廣泛應用，併發揮了重要作用。社會網路分析是社會學領域比較成熟的分析方法，社會學家們利用它可以比較得心應手地來解釋一些社會學問題。許多學科的專家如經濟學、管理學等領域的學者們在新經濟時代——知識經濟時代，面臨許多挑戰時，開始考慮借鑒其他學科的研究方法，社會網路分析就是其中的一種。 網路指的是各種關聯，而社會網路(Social Network)即可簡單地稱為社會關係所構成的結構。 從社會網路的角度出發，人在社會環境中的相互作用可以表達為基於關係的一種模式或規則，而基於這種關係的有規律模式反映了社會結構，這種結構的量化分析是社會網路分析的出發點。 網路指的是各種關聯，而社會網路(social network)即可簡單地稱為社會關係所構成的結構。 行動者(actor)：這裡的行動者不但指具體的個人，還可指一個群體、公司或其他集體性的社會單位。 關係紐帶(relational tie)：行動者之間相互的關聯即稱關係紐帶。 二人組(dyad)：由兩個行動者所構成的關係。 三人組(triad)：由三個行動者所構成的關係。 子群(subgroup)：指行動者之間的任何形式關係的子集。 群體(group)：其關係得到測量的所有行動者的集合。 社會網路分析是對社會網路的關係結構及其屬性加以分析的一套規範和方法。 從這個意義上說，社會網路分析不僅是對關係或結構加以分析的一套技術，還是一種理論方法——結構分析思想。 韋爾曼指出，作為一種研究社會結構的基本方法，社會網路分析具有如下基本原理： 1．關係紐帶經常是不對稱地相互作用著的，在內容和強度上都有所不同。 2．關係紐帶間接或直接地把網路成員連接在一起；故必須在更大的網路結構背景中對其加以分析。 3．社會紐帶結構產生了非隨機的網路，因而形成了網路群(network clusters)、網路界限和交叉關聯。 4．交叉關聯把網路群以及個體聯繫在一起。 5．不對稱的紐帶和複雜網路使稀缺資源的分配不平等。 6．網路產生了以獲取稀缺資源為目的的合作和競爭行為。 因此，社會結構有多重含義。 2．1中心性分析
Social network analysis software Social network analysis software (SNA software) is software which facilitates quantitative or qualitative analysis of social networks, by describing features of a network either through numerical or visual representation. Overview[edit] Some SNA software can perform predictive analysis.[5] This includes using network phenomena such as a tie to predict individual level outcomes (often called peer influence or contagion modeling), using individual-level phenomena to predict network outcomes such as the formation of a tie/edge (often called homophily models[6]) or particular type of triad, or using network phenomena to predict other network phenomena, such as using a triad formation at time 0 to predict tie formation at time 1. Network analysis software generally consists of either packages based on graphical user interfaces (GUIs), or packages built for scripting/programming languages. GUI packages are easier to learn, while scripting tools are more powerful and extensible. See also[edit]
UCINET Software Customer Support For customer support (e.g., ordering info, billing etc) contact roberta@analytictech.com. For tech support join the users group or contact support@analytictech.com. In addition, you should check out the support page, which includes useful things like tutorial exercises. Fixes, improvements, upgrades UCINET is constantly being upgraded to fix problems, provide new capabilities, or generally make things better. Download and/or Purchase The program can be downloaded and used for free for 90 days. Requirements and Specifications Windows operating system Vista or later. NodeXL: Network Overview, Discovery and Exploration for Excel CodePlexProject Hosting for Open Source Software NodeXL: Network Overview, Discovery and Exploration for Excel Getting Started The book Analyzing Social Media Networks with NodeXL: Insights from a Connected World is the most comprehensive source on NodeXL. Accompanying slides and datasets are available on the NodeXL Teaching Resources page. If you plan to use the book in a classroom setting, please contact Derek Hansen (shakmatt@gmail.com). A draft slide deck providing an overview of NodeXL is available here. Also see the NodeXL one-page flyer. Help Support NodeXL! Help support the continued development of NodeXL with your donation to the Social Media Research Foundation's NodeXL project fund. Publications See the list of NodeXL publications. If you would like to cite NodeXL in an academic publication, please use some form of the following: Smith, M., Milic-Frayling, N., Shneiderman, B., Mendes Rodrigues, E., Leskovec, J., Dunne, C., (2010). Posts About NodeXL Comments Fixed. System Requirements
yEd - Graph Editor yEd is a powerful desktop application that can be used to quickly and effectively generate high-quality diagrams. Create diagrams manually, or import your external data for analysis. Our automatic layout algorithms arrange even large data sets with just the press of a button. yEd is freely available and runs on all major platforms: Windows, Unix/Linux, and Mac OS X. The latest release is version 3.12.2 Key Features Import your own data from an Excel® spreadsheet (.xls) or XML Create diagrams with easevia an intuitive user interface. Automatically arrangeyour diagram elements. Export bitmap and vector graphicsas PNG, JPG, SVG, PDF, SWF yEd in 90 seconds Supported Diagrams yEd supports a wide variety of diagram types. Support Resources The yEd online support resources include the yEd Graph Editor manual and the yEd forum where you can give us feedback.
Downloads Gephi is an open-source and multiplatform software distributed under the dual license CDDL 1.0 and GNU General Public License v3. Official Releases Release Notes | System Requirements | Installation instructions Gephi 0.10.1 is the latest stable release. Download Gephi for LinuxVersion 0.10.1 If you have an older Gephi on your computer, you should uninstall it first, see the installation instructions. All downloads:Download Gephi 0.10.1 for Mac OS (Intel)Download Gephi 0.10.1 for Mac OS (Silicon)Download Gephi 0.10.1 for WindowsDownload Gephi 0.10.1 for LinuxDownload Older Versions On Linux, you may also find Gephi on Snapcraft and FlatHub. Sources: Gephi uses GitHub to host the source code and track issues. Localization Localization is available in French, Spanish, Japanese, Brazilian Portuguese, Russian, Chinese, Czech, German and Romanian. Data sets Learn how to use Gephi Gephi is free and open source software. Thank you for your support!
12:38 simple things的三个特征 by ecoin Jun 14