全文获取类型
收费全文 | 50篇 |
免费 | 4篇 |
专业分类
化学工业 | 9篇 |
金属工艺 | 1篇 |
建筑科学 | 3篇 |
轻工业 | 7篇 |
石油天然气 | 1篇 |
无线电 | 2篇 |
冶金工业 | 26篇 |
自动化技术 | 5篇 |
出版年
2023年 | 1篇 |
2021年 | 1篇 |
2019年 | 1篇 |
2018年 | 1篇 |
2016年 | 3篇 |
2015年 | 1篇 |
2014年 | 3篇 |
2013年 | 1篇 |
2012年 | 2篇 |
2011年 | 4篇 |
2010年 | 1篇 |
2009年 | 3篇 |
2008年 | 2篇 |
2007年 | 2篇 |
2006年 | 2篇 |
2005年 | 2篇 |
2004年 | 2篇 |
2003年 | 5篇 |
2002年 | 5篇 |
1997年 | 3篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1978年 | 1篇 |
1975年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有54条查询结果,搜索用时 31 毫秒
1.
Labouvie-Vief Gisela; Lumley Mark A.; Jain Elizabeth; Heinze Hillary 《Canadian Metallurgical Quarterly》2003,3(2):115
This research reports age and gender differences in cardiac reactivity and subjective responses to the induction of autobiographical memories related to anger, fear, sadness, and happiness. Heart rate (HR) and subjective state were assessed at baseline and after the induction of each emotion in 113 individuals (61 men, 52 women; 66% European American, 34% African American) ranging in age from 15 to 88 years (M = 50.0; SD = 20.2). Cardiac reactivity was lower in older individuals; however, for anger and fear, these age effects were significantly more pronounced for the women than the men. There were no gender differences in subjective responses, however, suggesting that the lower cardiac reactivity found among older people is dependent on gender and the specific emotion assessed. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
2.
This research explores the relationship between campus political norms and student political participation. This study conceptualizes norms as a group‐level construct by collecting data at several universities (k = 32 universities, n = 1,389 students) where norms vary without campaign intervention. Multilevel modeling reveals that perceptions of political norms converge within universities. Further, frequency of political communication at the group‐ and individual‐level explains increases in normative perceptions. This increase is meaningful because norms at the group level were predictive of political behaviors at the individual level. This research documents the existence of political norms beyond the individual level of analysis and highlights the important role of political norms, political communication, and social context in understanding political participation. 相似文献
3.
Communities, private companies, and households are increasingly turning to community solar as a way to fulfill sustainability and renewable energy goals. And for good reason—community solar can provide significant financial, social, environmental, and public relations benefits. However, due to the relatively new market and variability in financial projections and because each solar garden program and project is unique, participation in community solar comes with its own benefits, limitations, and uncertainties. 相似文献
4.
Amanda J. Cox Hillary N. Bengtson Dr. Yulia V. Gerasimova Dr. Kyle H. Rohde Dr. Dmitry M. Kolpashchikov 《Chembiochem : a European journal of chemical biology》2016,17(21):2038-2041
Some natural enzymes increase the rate of diffusion‐limited reactions by facilitating substrate flow to their active sites. Inspired by this natural phenomenon, we developed a strategy for efficient substrate delivery to a deoxyribozyme (DZ) catalytic sensor. This resulted in a three‐ to fourfold increase in sensitivity and up to a ninefold improvement in the detection limit. The reported strategy can be used to enhance catalytic efficiency of diffusion‐limited enzymes and to improve sensitivity of enzyme‐based biosensors. 相似文献
5.
Cover Picture: DNA Antenna Tile‐Associated Deoxyribozyme Sensor with Improved Sensitivity (ChemBioChem 21/2016) 下载免费PDF全文
6.
Getting off on the right foot: Subjective value versus economic value in predicting longitudinal job outcomes from job offer negotiations. 总被引:1,自引:0,他引:1
Curhan Jared R.; Elfenbein Hillary Anger; Kilduff Gavin J. 《Canadian Metallurgical Quarterly》2009,94(2):524
Although negotiation experiences can affect a negotiator's ensuing attitudes and behavior, little is known about their long-term consequences. Using a longitudinal survey design, the authors tested the degree to which economic and subjective value achieved in job offer negotiations predicts employees' subsequent job attitudes and intentions concerning turnover. Results indicate that subjective value predicts greater compensation satisfaction and job satisfaction and lower turnover intention measured 1 year later. Surprisingly, the economic outcomes that negotiators achieved had no apparent effects on these factors. Implications, limitations, and future directions are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
7.
Rosenwald AG Rhodes MA Van Valkenburgh H Palanivel V Chapman G Boman A Zhang CJ Kahn RA 《Yeast (Chichester, England)》2002,19(12):1039-1056
To examine the functions of the Arf-like protein, Arl1p, in Saccharomyces cerevisiae, a null allele, arl1delta::HIS3, was constructed in two strains. In one background only, loss of ARL1 resulted in temperature-sensitive (ts) growth (suppressed on high-osmolarity media). Allelic variation at the SSD1 locus accounted for differences between strains. Strains lacking ARL1 exhibited several defects in membrane traffic. First, arl1delta strains secreted less protein as measured by TCA-precipitable radioactivity found in the media of [(35)S]-labelled cells. A portion of newly synthesized carboxypeptidase Y (CPY) was secreted rather than correctly targeted to the vacuole. Uptake of the fluid-phase marker, lucifer yellow, was reduced. All these phenotypes were exacerbated in an ssd1 background. The ts phenotype of the arl1deltassd1 strain was suppressed by YPT1, the yeast Rab1a homologue, suggesting that ARL1 and YPT1 have partially overlapping functions. These findings demonstrate that ARL1 encodes a regulator of membrane traffic. 相似文献
8.
Kurt R Bogner HR Straton JB Tien AY Gallo JJ 《Computer methods and programs in biomedicine》2004,73(2):165-171
We wanted to test the psychometric reliability and validity of self-reported information on psychological and functional status gathered by computer in a sample of primary care outpatients. Persons aged 65 years and older visiting a primary care medical practice in Baltimore (n=240) were approached. Complete baseline data were obtained for 54 patients and 34 patients completed 1-week retest follow-up. Standard instruments were administered by computer and also given as paper and pencil tests. Test-retest reliability estimates were calculated and comparisons across mode of administration were made. Separately, an interviewer administered a questionnaire to gauge patient attitudes and feelings after using the computer. Most participants (72%) reported no previous computer use. Nevertheless, inter-method reliability of the GDS15 at baseline (0.719, n=47), intra-method reliability of the computer in time (0.797, n=31), inter-method reliability of the CESDR20 at baseline (0.740, n=53), and the correlation between the CESDR20 computer version at baseline and follow-up (0.849, n=34) were all excellent. The inter-method reliability of the CESDR20 at follow-up (0.615, n=37) was lower but still acceptable. Although 28% were anxious prior to using the computer testing system, that percent decreased to 19% while using the system. The efficiency and reliability in comparison to the paper instruments were good or better. Even though most participants had not ever used a computer prior to participating in the study, they had generally favorable attitudes toward the use of computers, and also reported having favorable experience with the computer testing system. 相似文献
9.
Past research has shown that self-handicapping involves the trade-off of ability-related attributional benefits for interpersonal costs. Study 1 examined whether perceiver or target sex moderates impressions of self-handicapping targets. Although target sex was not an important factor, female perceivers were consistently more critical of behavioral self-handicappers. Two additional studies replicated this gender difference with variations of the handicap. Study 3 examined the motives inferred by perceivers and found that women not only view self-handicappers as more unmotivated but also report greater suspicion of self-handicapping motives; furthermore, these differences in perceived motives mediated sex differences in reactions to self-handicappers. Implications for the effectiveness of self-handicapping as an impression management strategy are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
10.
Discusses common methodological errors in child and marital treatment research and presents suggestions to help investigators avoid such errors. The following areas are covered: selection of Ss and therapists, scope and source of dependent measures, treatment specification, experimental design, and data analysis and interpretation. Some of the most salient errors include (a) unsubstantiated diagnoses or client labels; (b) very few therapists per treatment condition; (c) restricted outcome criteria and the lack of reliable, valid dependent measures; (d) failure to provide treatment manuals and to check empirically whether the treatments were actually implemented; and (e) experimental designs that fail to address issues such as maturation, expectation, nonspecific relationship factors, and practical significance. (56 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献