全文获取类型
收费全文 | 172篇 |
免费 | 4篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 38篇 |
金属工艺 | 6篇 |
机械仪表 | 6篇 |
建筑科学 | 12篇 |
能源动力 | 1篇 |
轻工业 | 43篇 |
无线电 | 8篇 |
一般工业技术 | 11篇 |
冶金工业 | 25篇 |
自动化技术 | 25篇 |
出版年
2017年 | 1篇 |
2016年 | 2篇 |
2015年 | 1篇 |
2014年 | 4篇 |
2013年 | 34篇 |
2012年 | 3篇 |
2011年 | 4篇 |
2010年 | 3篇 |
2009年 | 3篇 |
2008年 | 5篇 |
2007年 | 5篇 |
2006年 | 2篇 |
2005年 | 9篇 |
2004年 | 3篇 |
2003年 | 1篇 |
2002年 | 2篇 |
2000年 | 3篇 |
1999年 | 2篇 |
1998年 | 7篇 |
1997年 | 4篇 |
1996年 | 7篇 |
1995年 | 1篇 |
1994年 | 5篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 3篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 1篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1979年 | 1篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1976年 | 1篇 |
1974年 | 2篇 |
1973年 | 2篇 |
1971年 | 1篇 |
1968年 | 7篇 |
1967年 | 8篇 |
1966年 | 5篇 |
1962年 | 1篇 |
1960年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有176条查询结果,搜索用时 15 毫秒
1.
CHARACTERISATION OF PATTERNS OF CHEWING BEHAVIOUR IN HUMAN SUBJECTS AND THEIR INFLUENCE ON TEXTURE PERCEPTION 总被引:1,自引:0,他引:1
WENDY E. BROWN KEITH R. LANGLEY ALAN MARTIN HALLIDAY J.H. MacFie 《Journal of texture studies》1994,25(4):455-468
Electromyography was used as a noninvasive and unobtrusive technique to characterise chewing patterns for a range of foods. Differences between subjects for a variety of aspects of chewing sequence are recorded for a range of foods (carrot, apple, roast pork, salami, biscuit and toast). Identifiable subgroups of subjects differing in chewing behaviour existed within the random sample of 52 dentate subjects. The five subgroups accounted for 52%, 21%, 11%, 10% and 6% of the sample population. Major discriminating factors between the behavioural groups lie in their chewing time and the muscle work rate during chewing. Sensory ratings for firmness and rubberiness of model foods differed significantly between the subjects exhibiting different chewing behaviours. Chewing behaviour may influence consumers' perceptions about the texture of a food. 相似文献
2.
High-pressure-induced changes in bovine milk: a review 总被引:2,自引:1,他引:1
THOM HUPPERTZ MARY A SMIDDY VIVEK K UPADHYAY ALAN L KELLY 《International Journal of Dairy Technology》2006,59(2):58-66
High-pressure (HP) treatment of food products is a novel processing technique during which the product is treated in a vessel of suitable strength at a high pressure, generally in the range 100–1000 MPa. As a result, several constituents and properties of the treated product are altered. HP-induced changes in the constituents and properties of milk are arguably among the most extensive of the range of food products studied to date. HP treatment of milk induces solubilization of minerals associated with the casein micelles, denatures whey proteins and, depending on pressure, can either induce aggregation or disruption of the casein micelles. These HP-induced changes in milk constituents affect the properties of the milk; cheesemaking properties of milk can be enhanced considerably, indicating potential application of HP treatment in this area; furthermore, encouraging results have also been reported for HP treatment of milk prior to yogurt manufacture. HP treatment of milk also affects its microflora; however, considerable variation in baroresistance between bacterial species and strains exists. Further applied research appears warranted to establish the full commercial potential of HP treatment of milk. 相似文献
3.
Magnetic Flux Controllers for Induction Heating Applications 总被引:3,自引:0,他引:3
ValentinNemkov RobertGoldstein RobertRuffini 《材料热处理学报》2004,25(5):567-572
Application of magnetic flux controllers/concentrators to induction heating coils can drastically improve the process efficiency and heat pattern control. Presentation includes: benefits provided by flux controllers, materials available for controllers, application techniques, computer assisted design of induction coils with concentrators, examples of applications. Depending on induction system design, magnetic flux controllers can concentrate heating in a specified area,change heat source distribution and shield a particular part zone or external area preventing unintended eddy current heating.Besides of the coil efficiency improvement and optimal power distribution, magnetic flux controllers reduce the coil current demand from a supplying circuitry thus strongly reducing losses in busswork, cables, transformers and inverter components.Improvement that can be achieved due to magnetic flux controllers is case dependable. 2D and 3D computer simulation allows the designer to predict accurately effect of controllers on the coil parameters and temperature distribution and optimize the whole electromagnetic system. Special attention in presentation is paid to new magnetodielectric materials optimized for induction heating conditions. These materials have high magnetic permeability and saturation flux density,excellent machinability, good chemical and temperature resistance. Concentrators from these materials can work in a wide range of frequencies and specific powers. Examples of magnetic flux controller application include surface hardening of shafts and gears, induction surface hardfacing and brazing. 相似文献
4.
Remo Ruffini 《Gravitation and Cosmology》2014,20(3):214-219
I review recent progress in the understanding of long, energetic (1052–1054 erg) gamma-ray bursts (GRBs) associated to supernovae (SN) Ib/c. This occurrence is explained within the Induced Gravitational Collapse (IGC) paradigm, following the sequence: 1) an initial binary system consists in a compact Iron-Carbon-Oxygen (FeCO) core and a neutron star (NS); 2) the FeCO core explodes, giving origin to a SN, and part of the SN ejecta accretes onto the NS which reaches its criticalmass and collapses to a black hole (BH) giving rise to a long GRB; 3) a new NS (ν-NS) is generated by the SN as a remnant. Observational consequences of this scenario are outlined. 相似文献
5.
JOSEPH CESARANO III ILHAN A. AKSAY ALAN BLEIER 《Journal of the American Ceramic Society》1988,71(4):250-255
Stability of aqueous α-Al2 O3 suspensions with Na+ salt of poly(methacrylic acid) (PMAA-Na) polyelectrolyte was studied as a function of pH. At a given pH, the transition from the flocculated to the dispersed state corresponded to the adsorption saturation limit of the powders by the PMAA. As the pH was decreased, the adsorption saturation limit increased until insolubility and charge neutralization of the PMAA was approached. The critical amount of PMAA required to achieve stability is outlined in a stability map. 相似文献
6.
Alecia C. Douglas Juline E. Mills Mamadou Niang Svetlana Stepchenkova Sookeun Byun Celestino Ruffini Seul Ki Lee Jihad Loutfi Jung-Kook Lee Mikhail Atallah Marina Blanton 《Computers in human behavior》2008,24(6):3027-3044
Internet addiction is “an individual’s inability to control their Internet use, which in turn leads to feelings of distress and functional impairment of daily activities” [Shapira, N., Lessig, M., Goldsmith, T., Szabo, S., Lazoritz, M., Gold, M. et al. (2003). Problematic Internet use: Proposed classification and diagnostic criteria. Depression and Anxiety, 17(4), 207–216]. Previous research in this field has offered inconclusive data on whether Internet addiction can be classified as a disorder. This study provides an in-depth and comprehensive analysis of internet addiction through a meta-synthesis of qualitative studies on excessive Internet use published during the period of 1996–2006. Several constructs pertaining to the domain of Internet addiction have been identified and a theoretical model of Internet addiction has been proposed. 相似文献
7.
Pleurotus ostreatus spent mushroom substrate for the degradation of polycyclic aromatic hydrocarbons: the case study of a pilot dynamic biopile for the decontamination of a historically contaminated soil 下载免费PDF全文
8.
9.
This article analyzes the evolution and spatial dynamics of condominium development in Toronto, the largest housing market in Canada and the site of a rapid take‐up of condominium tenure and construction over the last 40 years. The article probes the most influential policies that fostered and regulated condominium growth, and explores the implications for the continued restructuring of the city. A host of factors, including neoliberal state policies, have played a decisive role in fostering what we term condo‐ism, referring to an emerging nexus of economic development, finance, and consumption sector interests that have coalesced around condominium construction and culture. Policies have redirected growth to the urban core, channeled capital investments and young residents, and promoted gentrification, ultimately transforming the character of Toronto's central business district. The article explores these changes, and discusses their implications for contemporary emerging forms of capitalist urbanization and restructuring of the city. 相似文献
10.