Secondary Sources and Primary Sources “通过确定基本事实,例如建设年份,二手资料可以将研究人员指向最佳的primary sources,例如正确的税簿。 此外,仔细阅读二级来源的参考书目可以揭示研究人员可能错过的重要来源。” (Alison Hoagland and Gray Fitzsimmons, “History.”
在研究活动中,primary source是指从历史文献,文学文本,艺术作品,实验,调查和访谈等来源直接收集的信息。 也称为primary data。 与 secondary source 对比。 美国国会图书馆将primary sources定义为“从过去幸存下来的实际记录,如信件,照片或衣物”,与secondary sources相反,后者是”人们在有时写事件时创造的过去的记录 ...
4、With a secondary data source, users cannot save the data they enter into the form to use offline.使用辅助数据源，用户无法保存他们在表单中输入的数据以便脱机使用。
as people create a narrative that may not be accurate. For any source, primary or secondary, it is important for the researcher to evaluate the amount and direction of bias. As an example, a government report may be an accurate and unbiased description of events, but it can be censored or...
secondary data and primarydata ResearchMethodsinInternationalBusiness LinHua林花SouthwesternUniversityofFinanceandEconomics2012 1 Lecture5Structures Today’scoursestructures:Firstclass:taughtcourseDatasources:1.Secondarydata2.PrimarydataSecondclass:discussingwithyouaboutyourresearchtopicandresearchproblems(questions)2 Lec...
Remember: primary and secondary data can complement each other It’s important to remember that you don’t always have to make the choice between primary or secondary data. Often, secondary data can enrich existing primary data, or vice versa. You can use secondary data as preliminary research...
Predictions using previously measured levels and secondary data The main assumption of this study is that when primary data are not available, levels of insufficient food consumption and of crisis or above food-based coping can be estimated from secondary information, specifically on the key drivers ...
Electricity.a winding in a transformer or the like that carries a current and that induces a current in secondary windings. Astronomy. a body in relation to a smaller body or smaller bodies revolving around it, as a planet in relation to its satellites. ...
百度试题 结果1 题目What was the source of the data? A. Primary B. Secondary C. Tertiary D. Mixed 相关知识点: 试题来源: 解析 A。判断数据的来源类型。反馈 收藏
Synthesis of primary amides and N-Me secondary amides In our synthetic method, NaAB is soluble and stable in organic solvents62. Its reaction with methyl benzoate is selected as a model reaction to examine the reaction conditions and characterize the products. The reactions were carried out at ro...