System dynamics. Dynamic stock and flow diagram of model New product adoption (model from article by John Sterman 2001) System dynamics is an approach to understanding the behaviour of complex systems over time. It deals with internal feedback loops and time delays that affect the behaviour of the entire system.[1] What makes using system dynamics different from other approaches to studying complex systems is the use of feedback loops and stocks and flows.
These elements help describe how even seemingly simple systems display baffling nonlinearity. Overview[edit] System dynamics (SD) is a methodology and mathematical modeling technique for framing, understanding, and discussing complex issues and problems. Convenient GUI system dynamics software developed into user friendly versions by the 1990s and have been applied to diverse systems. System dynamics is an aspect of systems theory as a method for understanding the dynamic behavior of complex systems.
History[edit] Topics in systems dynamics[edit] Download and Try AnyLogic! Stat My Web - Website Analysis and Tools. Business / Math & Scientific Tools at Software Informer. Quality Tools and Templates. The Complete Online Six Sigma Resource - Downloads. Part 1: The essential collection of visualisation resources. This is the first part of a multi-part series designed to share with readers an inspiring collection of the most important, effective, useful and practical data visualisation resources.
The series will cover visualisation tools, resources for sourcing and handling data, online learning tutorials, visualisation blogs, visualisation books and academic papers. Your feedback is most welcome to help capture any additions or revisions so that this collection can live up to its claim as the essential list of resources.
This first part presents the data visualisation tools associated with conducting analysis, creating effective graphs and implementing business intelligence operations. Please note, I may not have personally used all tools presented but have seen sufficient evidence of their value from other sources. Microsoft Excel Find out more information | Cost: Trial > under £100/$150 per license | Tags: Spreadsheet, Office, Graphing Status: Ongoing (July 7, 2011) Open Office Calc Tableau Desktop. 統雄-統計神掌 因徑分析/結構方程模型篇 Path Analysis and SEM- Structural Equation Modeling. Path Analysis and SEM- Structural Equation Modeling, 1: 神掌打通任督二脈‧易筋經以簡馭繁 多變項-多因子分析常用模型簡介 因徑分析/結構方程模型特性理論必須與分析工具配合 Path Analysis 因徑分析 工作滿意度的因徑概念模型因徑模型的聯立方程式組因果關係：直接效果與間接效果因果關係：相關關係與偽效果偽效果的辨別與計算間接因果關係 探索式因徑/SEM模型建構: SPSS 應用 篩選自變項篩選相關變項檢查中介效果與篩選中介變項經由多元迴歸分析篩選中介變項 檢查標準化多元迴歸係數檢查間接效果建立因徑/SEM模型並檢定因果關係/總效果驗證式因徑/SEM模型建構 因徑模型的詮釋不好就打掉重作‧才是科學精神 SEM 結構方程模型: Amos 應用 概念模型意義 報表詮釋與模型驗證 反省1：β與e 反省2：因徑關係除了數字更要詮釋 反省3：框架知識與基礎知識/複雜模型與簡單模型 反省4：基礎知識/簡單模型的因子數 反省5：人類行為是線性或非線性？
反省6：人類行為變量是純量或向量？ 因徑分析(Path analysis)-1980年代後稱為結構方程模型(Structural equation modeling, SEM)-的目的在於建構1組「多變項的因果模型」，也就是包括：應變項、自變項、中介變項或調節變項、具備「因果關係」-不僅是「相關關係」的理論。 因徑/SEM模型分析與建構的基礎技術是多元迴歸，並應先有共變項分析、中介模型分析的前置觀念。 Path analysis is an extension of the regression model, used to test the fit of the correlation matrix against two or more causal models which are being compared by the researcher. 在統計軟體問世後，有些產品將因素分析、多元迴歸與因徑分析的功能結合，並命名為結構方程模型，也就是先將量表的項目萃取出「因素」-理論建構上稱為「潛在變項、或構念」後，再進行多元迴歸、因果模型建構。 所以，有的文獻將沒有作因素萃取的研究過程稱為因徑分析，而有因素萃取的稱為SEM，還有些文獻作了更細瑣的分類條件。 理論必須與分析工具配合 基於多元迴歸分析法的應用。 如果： Sloan School of Management | 15.082J Network Optimization, Fall 2010 | Lecture Notes. Engineering Systems Division | ESD.342 Advanced System Architecture, Spring 2006 | Lecture Notes. 玻色－愛因斯坦凝聚与量子計算机. 【大紀元1月11日訊】德國科學家在新一期《自然》雜志上發表論文介紹說，通過改變激光束构築的三維能量點陣中激光的能量，他們首次實現了玻色－愛因斯坦凝聚態下銣原子气体的超流体態与絕緣態的可逆轉換。
据新華社報道,科學家認為這一發現具有重大意義，并可能為量子計算机的研究帶來重大突破。 在微觀狀態下讓物質處于可控制狀態一直是對科學家們的一個重大挑戰。 １９２４年，印度物理學家玻色曾對光粒子進行了這方面的理論研究，并把重要的研究結果告訴了愛因斯坦。 在將玻色的理論推廣到了對特定原子的研究領域后，愛因斯坦預言，如果將這類原子气体冷卻到非常低的溫度，那么所有原子會突然以可能的最低能態凝聚，物質的這一狀態后被稱為玻色－愛因斯坦凝聚。 在愛因斯坦預言的７０年后，也就是到了１９９５年，兩名美國科學家康奈爾和維曼以及德國科學家克特勒分別在极為接近絕對零度的條件下首次通過實驗証實了玻色－愛因斯坦凝聚理論。 超流体是指一种具有奇特性質的理想流体，即流体內部完全沒有粘滯。 打個比方說，如果將一群原子以一群人來表示，那么進入玻色－愛因斯坦凝聚態則意味著這群人同時成為了訓練有素的士兵，具有共同良好的軍事素質﹔超流体態如同大軍幵拔，可以迅速南征北戰﹔而絕緣態則表示大軍駐扎，各自休養生息。 《自然》雜志發表的文章介紹說，大量的銣原子可以成為量子計算机的存儲器，如果有兩個這樣的存儲器，利用它們之間的相互作用，就可以實現量子計算。 光子的玻色-愛因斯坦冷凝態. 2011 三月 6日 18:16 圖片援引自原文 如同無質量且無電荷的整數自旋(integer spin)粒子，光子是最單純的玻色子(bosons)。 於1924年，當Satyendra Nath Bose提出計數難以分辨之粒子的新方法時，心中已經有了光子的概念。
這方法導致亞伯特愛因斯坦推斷了，被通稱為玻色-愛因斯坦凝聚態(Bose-Einstein condensate：BEC)的物質態：也就是，積聚的玻色子變得夠冷時，此些玻色子的宏觀部分聚集成單量子態。 不過迄今為止，光子的BEC不曾被觀測到。 目前，Martin Weitz及來自德國波恩大學(the University of Bonn)的同僚們業已克服形成光子BEC的諸多障礙。 為了產生BEC，Weitz及同僚們藉由調高雷射功率，來增加散射光子的數量。 原文網址： A Bose-Einstein condensate of photons> 翻譯：peregrine | 本文轉載自 PEREGRINE科學點滴 peregrine 你可能還會想知道: 中學教育網. SPAR_Article.pdf (application/pdf 物件) AckoffGuidetoIdealizedRedesign.pdf (application/pdf 物件)
User Manual. GO maintains a list of association files for many organisms; these files associate genes with GO terms. The next step is to get the file for the organism(s) you are interested in, and parse it into the form Cytoscape needs. A list of files may be seen at The rightmost column contains links to tab-delimited files of gene associations, by species. Choose the species you are interested in, and click 'Download'. Let's use "GO Annotations @ EBI: Human" as an example. After you have downloaded and saved the file, look at the first few lines: SPTR O00115 DRN2_HUMAN GO:0003677 PUBMED:9714827 TAS F Deoxyribonuclease II precursor IPI00010348 protein taxon:9606 SPTR SPTR O00115 DRN2_HUMAN GO:0004519 GOA:spkw IEA F Deoxyribonuclease II precursor IPI00010348 protein taxon:9606 20020425 SPTR SPTR O00115 DRN2_HUMAN GO:0004531 PUBMED:9714827 TAS F Deoxyribonuclease II precursor IPI00010348 protein taxon:9606 SPTR ... or.
羅素·艾可夫. 出自 MBA智库百科( 羅素·艾可夫（Russell L. Ackoff） 羅素·艾可夫（Russell L. Ackoff，也譯為拉塞爾·阿克夫、拉塞爾·阿考夫、拉塞爾·艾考夫）——開創了企業管理的“社會系統時代” 羅素·艾可夫(Russell L. 在1964年回到母校賓州大學之前，艾可夫執教於俄亥俄州克裡夫蘭市的Case Institute of Technology。 羅素·艾可夫興趣廣泛，從人類行為到城鎮規劃，無不涉獵。 艾可夫不僅寫出了一部又一部的著作，他還為管理思想家們開闢了一塊論爭的新天地，也因此贏得了系統理論之泰斗的美譽。 艾可夫認為，營運研究遠遠沒有被充分利用，它的收效甚微是因為人們在運用它的時候帶著片面的理解，因此艾可夫的著作和演講中時時流露出特有的尖酸刻薄的機智。 確實，艾可夫總是樂於挑戰傳統，在沃頓任教時，他的課程無事先安排，不上課，免考試，進來容易出去難：想要通過他的課，學生得提交一份學業規劃，內容翔實之外還得有清楚的過程。
最近以來，艾可夫把註意力投向了社會的其他方面，比如教育方面，他倡議大學應該減少教學工作，因為教師的灌輸會妨礙學生的認知。 企業必須懂得活學活用並能不斷地自我調節，適者生存是亘古不變的道理。 艾可夫的新近作品還包括《擊敗系統：憑藉創造力來取勝官僚主義》(Beating the System: Using Creativity to Outsmart Bureaucracies， 2005)，書中收集了一系列如何招架毀謗及干涉行為的奇聞軼事。 如果說泰羅和法約爾開創了“機器時代”的企業管理理論，那麼，巴納德開創了“生物系統時代”的管理理論，而阿科夫則開創了“社會系統時代”的管理理論。 在“機器時代”，“人”被認為是企業這部機器中的一個零件，可以隨時更換，不會影響整個企業的運行。 在“生物系統時代”，“人”被視為企業這個有機體的一個組分，儘管與其它組分有著複雜的有機關聯，隨意“更換”對整個企業的運行會有影響，但不接受“人”作為一個“個體”在企業中有著自己的（私人）目的。 在“社會系統時代”，“人”被視為企業的一個“利益相關者”，承認其是一個具有自己目標的獨立系統，為企業是為了實現自己的目標，而不是為了實現企業的目標。 Russell L. Operations research f-Laws. 网络科学:原理与应用/路易斯(Ted G.Lewis) Introduction to Cytoscape (Part 1 of 2) Complex networks and systems. Download_file?etdun=U0026-0812200913441829&fileName=U0026-0812200913441829-1. NetWiki : Networks Conferences browse. This list remains obviously very incomplete.
Please feel free to advertise upcoming conferences and to provide links to past conferences with interesting online materials. Future Conferences Past Conferences. VisANT: An integrative platform for network/pathway analysis. 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. We prefer you try the users group first since the answer to your question may benefit others. 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. Digital Ecosystems Research: PRESENTATIONS. 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. This Windows-based software (1) allows analysts to view a decision problem and find the best solution from different perspectives; (2) performs standard, but time-consuming, tasks quickly and efficiently; (3) offers a range of decision analysis and trade-off methods that cannot be performed manually; and (4) presents results in convenient graphical and numerical formats. DAM also allows for imprecise or interval trade-offs. 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. 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. A separate download is available for NeuroSolutions for MATLAB. Please complete the form below and click the submit button at the bottom. After your submission is verified, you will be given your download options. "I have recently purchased a copy of NeuroSolutions 4 and am very happy with the software. VUEProject. 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 0.9.2 is the latest stable release. Download Gephi for LinuxVersion 0.9.2 If you have an older Gephi on your computer, you should uninstall it first, see the installation instructions. All downloads:Download Gephi 0.9.2 for Mac OS XDownload Gephi 0.9.2 for WindowsDownload Gephi 0.9.2 for LinuxDownload Gephi 0.9.2 sourcesDownload Older Versions 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 and German. Data sets Web/Internet, Social Networks, Biological Networks, Infrastructures and others… If you are looking for data samples to test Gephi, look at the wiki. Learn how to use Gephi Thank you for your support! Gephi中文教程 by Ooof. Introduction to yEd (Part 1 of 2) NodeXL: Network Overview, Discovery and Exploration for Excel. Products - Connect Overview. Torsten Reil builds better animations. George Dyson at the birth of the computer. The Art of Economic Complexity.
Tim Harford: Trial, error and the God complex. TEDxBoston - César A. Hidalgo - Global Product Space. Are we filtering the wrong microbes? Saul Griffith on everyday inventions. WHERE GOOD IDEAS COME FROM by Steven Johnson. George Whitesides: Toward a science of simplicity. 怎样化杂为简. Eric Berlow. Geoffrey West: The surprising math of cities and corporations. Scaling of cities. Tuvalu.santafe. Bionics/Biomimetics/Biomimicry.