全文获取类型
收费全文 | 213篇 |
免费 | 15篇 |
国内免费 | 1篇 |
专业分类
化学工业 | 36篇 |
机械仪表 | 4篇 |
建筑科学 | 13篇 |
能源动力 | 3篇 |
轻工业 | 28篇 |
水利工程 | 2篇 |
无线电 | 24篇 |
一般工业技术 | 56篇 |
冶金工业 | 29篇 |
自动化技术 | 34篇 |
出版年
2023年 | 2篇 |
2021年 | 10篇 |
2020年 | 10篇 |
2019年 | 15篇 |
2018年 | 20篇 |
2017年 | 9篇 |
2016年 | 10篇 |
2015年 | 3篇 |
2014年 | 13篇 |
2013年 | 16篇 |
2012年 | 11篇 |
2011年 | 13篇 |
2010年 | 18篇 |
2009年 | 12篇 |
2008年 | 9篇 |
2007年 | 6篇 |
2006年 | 11篇 |
2005年 | 10篇 |
2004年 | 9篇 |
2003年 | 4篇 |
2002年 | 4篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1987年 | 1篇 |
1978年 | 1篇 |
排序方式: 共有229条查询结果,搜索用时 15 毫秒
101.
Fernanda Demoliner Letícia Turcatto de Carvalho Gabriela Rodrigues de Liz Elane Schwinden Prudêncio Juliano Carvalho Ramos Vera Lúcia Azzolin Frescura Bascuñan Luciano Vitali Jane Mara Block 《International Journal of Food Science & Technology》2020,55(8):3031-3042
The nutrient profile and the phytochemical composition of the sapucaia nut cake milk (SNCM) were evaluated after applying five consecutive stages of block freeze concentration (C1, C2, C3, C4 and C5). The profile of phenolic compounds by LC-ESI-MS/MS and the antioxidant activity (ABTS and FRAP) of SNCM were also determined. The freeze concentration increased proteins, lipids, carbohydrates, ash, soluble solids (°Brix) and total phenolic compounds (TPC) in all stages and in the ice fractions obtained from C1, C2 and C3 stages. The antioxidant activity (ABTS) in C3, C4 and C5 fractions was highly significant (P < 0.05). The antioxidant activity (FRAP) and the phenolic compounds (gallic, vanillic, ferulic, sinapic and salicylic acids, catechin, taxifolin and sinapaldehyde) increased significantly (P < 0.05) for all five fractions. The freeze concentration was successfully used for enriching the SNCM, generating a promising ingredient for the food industry. 相似文献
102.
103.
Evolving requirements from their users, increased technical capability, and access to new sources of funding are all playing a part in ensuring that our memory institutions change; sometimes beyond recognition. This paper explores some of the ways in which these institutions are changing, and questions the effect such changes are likely to have upon the institutions themselves, and upon those who use and work within them. 相似文献
104.
Liz Barnes 《Textile Progress》2013,45(2-3):182-207
This issue of Textile Progress provides a critical literature review and reflection relating to academic research in the field of fashion marketing. As the topic has not been reviewed before in Textile Progress, the paper takes the concepts of marketing and fashion in turn, exploring the literature from its origins to the present day and then considers how and why these two concepts have become merged to form a discrete academic research theme.The exploration of marketing includes a discussion of the origins of the marketing concept which emerged in the 1950s alongside the growth in mass consumerism. The paper discusses the ubiquitous ‘marketing mix’ theory and explains how research in marketing shifted its focus in the 1980s and 1990s as new paradigms developed, and their applicability to the marketing concept were debated.The concept of fashion is considered in terms of the context of historical research on fashion, for example, from the sociological or psychological perspective, and how the concept of fashion can be considered both academically and commercially.The review then goes on to evaluate the concept of fashion marketing as a discrete area for academic research, arguing that it has distinct theoretical perspectives from those of pure ‘marketing’ or ‘fashion’ theory, and culminating in a review of contemporary research in the field of fashion marketing, specifically that relating to fast fashion and ‘digital’ fashion marketing. 相似文献
105.
Liz Whitley 《International Journal of Dairy Technology》2013,66(2):303-304
106.
107.
Verónica Salgueiriño‐Maceira Miguel A. Correa‐Duarte Manuel Bañobre‐López Marek Grzelczak Michael Farle Luis M. Liz‐Marzán José Rivas 《Advanced functional materials》2008,18(4):616-621
Several nanometer‐scale technological applications rely on the promising scenario of highly anisotropic magnetic materials. Bearing this in mind, we have studied the structure, magnetic properties, and interfacial exchange anisotropy effects of unique wires of Ni/NiO synthesized using carbon nanotubes as substrates. Structural analyses of these nanocomposites in correlation with magnetic measurements show that the crystalline NiO outer shells cause an enhanced exchange bias, providing an extra source of anisotropy that leads to their magnetization stability. These Ni/NiO nanowires, with a spin‐glass‐like behavior and with their magnetic moments in a blocked state over a wide temperature range that includes room temperature, should therefore inspire further study concerning the applicability of anisotropic structures. 相似文献
108.
109.
Liz de Rome Soufiane Boufous Thomas Georgeson Teresa Senserrick Rebecca Ivers 《Accident; analysis and prevention》2014
Introduction
A majority of cyclists’ hospital presentations involve relatively minor soft tissue injuries. This study investigated the role of clothing in reducing the risk of cyclists’ injuries in crashes.Methods
Adult cyclists were recruited and interviewed through hospital emergency departments in the Australian Capital Territory. This paper focuses on 202 who had crashed in transport related areas. Eligible participants were interviewed and their self-reported injuries corroborated with medical records. The association between clothing worn and injury was examined using logistic regression while controlling for potential confounders of injury.Results
A high proportion of participants were wearing helmets (89%) and full cover footwear (93%). Fewer wore long sleeved tops (43%), long pants (33%), full cover gloves (14%) or conspicuity aids (34%). The primary cause of injury for the majority of participants (76%) was impact with the ground. Increased likelihood of arm injuries (Adj. OR = 2.06, 95%CI: 1.02–4.18, p = 0.05) and leg injuries (Adj. OR = 3.37, 95%CI: 1.42–7.96, p = 0.01) were associated with wearing short rather than long sleeves and pants. Open footwear was associated with increased risk of foot or ankle injuries (Adj. OR = 6.21, 95%CI: 1.58–23.56, p = 0.01) compared to enclosed shoes. Bare hands were associated with increased likelihood of cuts, lacerations or abrasion injuries (Adj. OR = 4.62, 95%CI: 1.23–17.43, p = 0.02) compared to wearing full cover gloves. There were no significant differences by fabric types such as Lycra/synthetic, natural fiber or leather.Conclusions
Clothing that fully covers a cyclist’s body substantially reduced the risk of injuries in a crash. Coverage of skin was more important than fabric type. Further work is necessary to determine if targeted campaigns can improve cyclists’ clothing choices and whether impact protection can further reduce injury risk. 相似文献110.