A. It can be generalized to a large population. B. It provides in-depth understanding of a specific case. C. It requires a small amount of data collection. D. It is quick and E. asy to conduct. 相关知识点: 试题来源: 解析 B。案例研究方法的优势在于能对特定案例进行深入理解。选项 A ...
- 《Journal of Materials Research & Technology》 被引量: 0发表: 2024年 含预制椭圆形孔洞砂岩强度及破坏特征试验研究 Experimental study of strength and failure characteristics of sandstone containing prefabricated elliptical hole[J]. Journal of China University of Mining and ... 杜明瑞,靖洪文,苏海健,...
It is concluded that the strength reduction that takes place from peak to post-rupture strength is due primarily to breakage of interparticle bonds, but that at higher confining pressures some particle orientation also takes place. 展开 关键词: A laboratory study of the strength of four stiff ...
The non-API standard series of oil country tubular goods (OCTG) have been developed rapidly to meet the increasing demand of the oil and gas fields, while ... M Xu,C Feng,L Zhu,... - 《International Journal of Metrology & Quality Engineering》 被引量: 0发表: 2023年 Study on the Con...
Strength training is an important part of any exercise routine, but some women may not be getting the recommended hours. New Penn State research discovered some of the barriers preventing women from strength training, as well as some solutions to overcom
An Experimental Study on Performance of Cement Mortar Concrete with Partial Replacement of Cement with Clay Brick Powder Cement is a good binding substance that is widely used in building, however the amount of CO2 emitted in the making of cement is increasing every day. We m... N Himabindhu...
2. Manson JE, Cook NR, Lee IM, et al; VITAL Research Group. Marine n-3 fatty acids and prevention of cardiovascular disease and cancer. N Engl J Med . 2019;380(1):23-32. 3. Bowman L, Mafham M,Wallendszus K, et al. ASCEND Study Collaborative Group. Effects of n-3 fatty acid...
Finally, previous results on test-retest reliability and criterion validity were replicated.This study is the first to show SDQ scores are predictively valid, attesting to the feasibility of the SDQ as a screening instrument. Future research into predictive validity of the SDQ is warranted. 展开 ...
Therefore, the search for a concrete strength research method that can integrate multiple strength influencing factors with high efficiency and accuracy is on the agenda. With the development of computer science, some researchers have introduced machine learning into the study of concrete strength30,31...
aA number of researchers have discussed the strengths and weaknesses of qualitative methods in research in education. For example, Firestone (1987) and Jacob (1987) present a general analysis of the problems, and the classic work of Ericsson and Simon (1980) deals with the use of verbal ...