entity-relationship model 中文意思是什麼

entity-relationship model 解釋
er模型
  • entity : n. 1. 實體；統一體。2. 存在（物）。3. （有別于屬性等的）本質。
  • relationship : n. 1. 親戚，親戚關系。2. 關系，聯系。3. 〈委婉語〉男女關系〈指男女之間的曖昧關系〉。
  • model : n 1 模型，雛型；原型；設計圖；模範；（畫家、雕刻家的）模特兒；樣板。2 典型，模範。3 （女服裝店僱...
  1. Aiming at matching searching of customer demand in product configuration design of case - based reasoning, the conception of the entities, the entity, the attribute, the primary attribute set, the similar element etc. were introduced, and the similarity calculation model based on entity attribute was established ; the mapping relationship of customer demands and the product structure cellular feature during the process of product configuration was studied, and the calculation flow of similarity was put forward ; the type, range and weighting of attribute were analyzed, the calculation method of property similarity and formula of entity similarity were advanced

    摘要針對基於實例推理的產品配置設計中客戶需求匹配搜索的問題，引入了實體集、實體、屬性、主屬性集、相似元等概念，建立了基於實體屬性的相似度計算模型；研究了產品配置過程中客戶需求與產品結構單元特徵之間的映射關系，提出了相似度的計算流程；分析了屬性的類型、值域和權重，提出了屬性相似度的計算方法和實體相似度的計算公式。
  2. In addition, it puts forward a nested temporal db, which, with stronger expressive ability than others, is a breakthrough to entity - relationship model and is referred to as nter model. it also verifies the expressive ability of nter when it is applied to sidss. finally, in view of the features of sidss and the current status of salary distribution system, it conducts initial study of the sidss based on temporal - spatial relationship and the sidss with a temporally - driven knowledge database, with the aim for us to develop a consummate sidss system in the future

    本文中，介紹了時態數據庫的基本概念、發展、特點和分類；結合sidss的背景、特色及體系結構，詳細討論了sidss的時態性及其數學模型，指出將時態數據庫應用到sidss並作進一步的研究是必然趨勢，並在此基礎上研究了時態數據庫系統的模型；在探討了幾種模型之後，打破實體-關系類的模型的框框，提出了一個表達能力較強的嵌套時態數據模型，稱之為nter模型（ nestedtemporalentity - relationshipmodel ） ，並驗證將其應用到sidss系統中的表達能力；最後針對sidss的特點以及目前工資管理系統的狀況，進一步對基於時空關系的sidss系統、由時態驅動知識庫的sidss系統進行初步探討，以期今後對開發更完善的引） ss系統作進一步的研究。
  3. Through analyzing several current - prevailing geography information types and gis data formats, this paper proposes a both user - oriented and multi - resource - heterogeneous - information - system - oriented scheme that describes the urban space semantic information entity based on ontology. moreover, ontology - based topology and semantic relationship of the urban space entity are provided. this paper also presents a synthetic query model of ontology - driven space information and a methodology of semantic integration

    本文在分析了國內外流行的gis系統的地理信息類型和數據格式的基礎上，提出基於本體論的，面向用戶應用、面向多源異構信息系統的城市空間語義信息實體的描述方法，提出基於本體的城市空間實體拓撲關系及語義關系，確立了本體驅動的空間信息的綜合查詢模型，以及語義信息集成方法。
  4. With the help of the desiign principle of standardized database, it concludes the approach how to eliminate transfer dependence on the correlative tables, and discusses the way of how to use entity - relationship ( e - r ) model to design the database

    論文還通過範式及規范理論，推導了如何消除關系表中的傳遞依賴，並討論了使用實體聯系（ e - r ）模型設計數據庫的方法。
  5. 12 chen p p. the entity - relationship model - toward a unified view of data

    例如，定義一個問題歸約范疇有所有的問題類組成。
  6. 2 after the research for engineering database, combining this system specific engineering database demand, establish the entity - relationship diagram for cutting parameter engineering database and convert the entity - relationship diagram to relation model

    2通過對工程數據庫的研究，結合本系統中切削參數工程數據庫要求，建立了切削參數工程數據庫的實體?聯系模型，並將實體?聯系模型轉換為關系模型。
  7. The approach focuses on well defined update attributions of trust relationship controlled by any entity dynamically and tries to simplify trust chain model in cross delegations setting by the treatment of its associated definitions and related data computations

    該方法考慮了信任關系動態變化的屬性，著重於信任度的動態更新計算策略。計算中通過對關聯信任鏈的定義和處理，對交義信任鏈進行合理的簡化； 4 ）
  8. Database of data warehouse and traditional operational database are compared in this paper, then the design of " normative " operation system is reviewed, four typical data models are introduced - entity - relationship model 、 object model 、 dimensional model and star model

    摘要比較了數據倉庫數據庫與傳統操作型數據庫，回顧了「規范的」操作型系統設計，介紹了四種典型的數據模型實體關系模型、對象模型、維模型和星型模型。
  9. During the design of accelerator cavity, we must face complicated objects and time - varied data. it is necessary for us to consider an object - oriented and temporal data model. therefore, we give a conceptual data model, that is entity - relationship data model ( shorten as ter model )

    目錄中國原子能科學研究院博士學位論文h在加速器腔體的設計中，所面臨的對象是復雜的，數據是時變的，所以我們有必要提出一個面向對象的、時態的數據模型。
  10. An ooa model may be expressed informally in diagrams or text, or more formally in entity - relationship ( er ) diagrams, data - flow diagrams, state - transition diagrams, or a variety of specialty representation currently available

    面向對象分析模型可以非正規地用圖表或者文本表示，或者正規些用實體關系圖，數據流圖，狀態轉換圖，或可以利用的其他方式來表示
  11. The entity - relationship model has gained acceptance in database design and is widely used in practice

    實質-聯系的模型已經得到數據庫的接收設計並且廣泛地被用於練習。
  12. The entity - relationship model and the object - oriented model are representatives of the class of the object - based logical models

    實質-聯系的模型和物件定向的模型是以物件為基礎的合乎邏輯的模型類別的代表。
  13. The object - oriented model includes many of the concepts of the entity - relationship model, but represents executable code as well as data

    物件定向的模型含實質-聯系的模型許多觀念，但是表現可運行的碼和數據。
  14. You will also learn how to use azzurri clay to create entity relationship diagrams erds, reverse - engineer databases, add tables, edit tables, delete tables, edit relationships, add indexes, and change your underlying data model into different sql dialects

    您將看到如何使用azzurri clay建立實體關系圖（ erd ） 、對數據庫進行逆向工程、添加表、編輯表、刪除表、編輯關系、增加索引以及將底層的數據模型改為不同的sql方言。
  15. For easy implementation we designed an object relationship model for pki entity

    為簡化pki實施，我們設計了一個pki實體的對象關系模型。
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