首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   182篇
  免费   8篇
电工技术   1篇
化学工业   35篇
金属工艺   4篇
机械仪表   1篇
建筑科学   7篇
矿业工程   2篇
能源动力   4篇
轻工业   17篇
无线电   10篇
一般工业技术   13篇
冶金工业   81篇
自动化技术   15篇
  2019年   2篇
  2017年   6篇
  2016年   4篇
  2015年   3篇
  2014年   5篇
  2013年   10篇
  2012年   9篇
  2011年   9篇
  2010年   8篇
  2009年   7篇
  2008年   5篇
  2007年   5篇
  2006年   6篇
  2005年   4篇
  2004年   7篇
  2003年   9篇
  2002年   10篇
  2001年   3篇
  2000年   2篇
  1999年   4篇
  1997年   2篇
  1996年   4篇
  1995年   2篇
  1994年   3篇
  1993年   2篇
  1992年   2篇
  1990年   3篇
  1989年   4篇
  1987年   4篇
  1986年   3篇
  1985年   6篇
  1984年   5篇
  1983年   3篇
  1982年   2篇
  1981年   5篇
  1978年   1篇
  1977年   1篇
  1976年   2篇
  1974年   2篇
  1972年   2篇
  1970年   2篇
  1969年   1篇
  1965年   1篇
  1964年   2篇
  1962年   1篇
  1957年   1篇
  1954年   1篇
  1952年   1篇
  1949年   1篇
  1946年   1篇
排序方式: 共有190条查询结果,搜索用时 562 毫秒
61.
62.
Abstract To determine the acute effects of environmental tobacco smoke on respiratory tract lung function, 130 asthmatics and 28 non-asthmatics were exposed up to 4 hours to side stream environmental tobacco smoke (SS-ETS) in a dynamic challenge chamber. The vast majority of the subjects exposed to SS-ETS reported upper respiratory and ocular irritant symptoms; the prevalence of these symptoms was not significantly associated with any particular study groups analyzed, or with the self-perception of tobacco smoke allergy by the study subject. All 28 SS-ETS-exposed non-asthmatics had no significant change in lung function, while 26/130 asthmatics demonstrated a significant drop in pulmonary function (FEV1≥20% decline), generally within 90 to 240 minutes after start of exposure. Classical late phase bronchoconstriction was not observed up to 24 hours following the challenge. Six/26 reactors had a significant drop in lung function following a sham control challenge, indicating that 20/130 asthmatics had a specific bronchoconstrictive response to SS-ETS. Responses to diminishing levels of SS-ETS demonstrated that some asthmatics can react to levels as low as 0.0128 cigarette – min/m3 (comparable to ETS levels in the homes of many smokers).  相似文献   
63.
Examined differences between more and less effective trainee psychotherapists. Therapists were assigned to one of two groups depending on whether the preponderance of their patients' changes in symptomatology indicated more or less improvement over the course of therapy. Therapist variables included emotional adjustment, relationship skills, eliciting patient involvement, credibility, directiveness, and theoretical orientation. Less effective therapists were revealed to have lower levels of empathic understanding, to rate their patients as more involved in treatment, and to rate themselves as more supportive than the more effective therapists. Less effective therapists also valued comfort and stimulation significantly more and valued intellectual goals significantly less than did more effective therapists. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
64.
Bulimic women from underweight (n?=?20), normal-weight (n?=?31), and overweight (n?=?22) categories were compared with restrictor anorexics (n?=?20), normal controls (n?=?31), and obese Ss (n?=?22). Ss' mean age was 21.13 yrs. Each S was administered the Minnesota Multiphasic Personality Inventory (MMPI), Rotter's Internal–External Locus of Control scale, the Rosenberg Self-Esteem Scale (M. Rosenberg, 1965), and the Semantic Differential scale. Bulimic women in all 3 weight categories exhibited greater psychopathology, more external locus of control, lower self-esteem, and lower sense of personal effectiveness than nonbulimic women at similar weight levels. The highest psychopathology, lowest self-esteem, and most external locus of control were found among the underweight bulimic women. Significant differences between bulimic women of different weight levels suggest the need for some modification of treatment approaches depending on the bulimic woman's weight level. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
65.
Hypothesized that a rudimentary capacity to impute internal states to self and to other emerges with the onset of communicative intentions. The ability to speak about mental states begins late in the 2nd yr and burgeons in the 3rd yr. Mothers of 30 28-mo-olds were asked to report child utterances containing 6 categories of internal-state words (perception, physiology, affect, volition/ability, cognition, and moral judgment/obligation). Of these, affect, cognition, and moral terms were less common than the others. Ss who applied a specific label to self and other tended to use it also to speak about nonpresent states. Use of a term for only self was more common than use for only other. Causal statements referred primarily to affect. Three categories of causal statements were identified: state change/maintenance, antecedents of states, and definitions of states in terms of other states, physical symptoms, and behaviors. Assessments of internal-state language that were obtained through maternal observation/report and directly from the child were highly correlated. (40 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
66.
The Matthews Youth Test for Health described by K. A. Matthews and J. Angulo (see record 1980-24519-001) was used to classify 120 children from 9 preschool classrooms as high or low on behaviors associated with the Type A pattern. Peer responses to the children were gathered sociometrically, and utterances of classroom teachers were tape recorded in a naturalistic setting. Boys gave higher sociometric ratings to high-competitive girls, and girls gave higher ratings to low-competitive boys. Teacher verbal utterances addressed to high-competitive children were characterized by less challenging cognitive processes and lower affective quality. Teacher verbal utterances addressed to children high on impatience/aggression were characterized by lower affective quality, fewer opportunities for child autonomy, more social/behavioral instructions, and more physical expressions of affection. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
67.
Investigated sex differences in mathematical and spatial (visual-analytic) skills in 3 ethnic groups (Black, Hispanic, and White) prior to and during adolescence. Ss were 240 3rd, 4th, 5th, and 9th graders, and instruments included the Children's Embedded Figures Test and the Modern Mathematics Supplement to the Iowa Tests of Basic Skills. Significant interaction effects were demonstrated between ethnic group membership and sex for both mathematical and spatial skills. In Hispanic adolescent groups, significant sex differences were found in scores on both skills in favor of the female. A similar but not significant trend was seen in the scores of Black adolescent groups. In contrast, White adolescent males scored higher than White adolescent females, but not significantly so. No prior study has reported the observed pattern of sex differences in Hispanic Ss, one that differs from that usually found in White Ss. (10 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
68.
The interconnections between health, housing and energy are increasingly apparent. Fossil fuel combustion has a clear negative effect on public health, with impacts that are disproportionately felt among communities of color, the poor, and other vulnerable populations in the U.S. and globally. Energy efficiency has a well-documented positive impact on household health, including decreases in asthma and cardiovascular disease. The utility industry has an important role to play in improving the health of its customers.  相似文献   
69.
The effects of labeling vanilla type on consumer liking of vanilla ice cream were evaluated. Three experiments with 144 to 150 panelists using 4 commercial ice creams were done where the samples were initially not labeled with the type of vanilla flavoring, then labeled, and finally labeled either correctly or incorrectly. Three experiments (116 to 150 panelists) then were conducted similarly for 3 laboratory‐made ice creams. When the 4 commercial samples were not labeled, a natural vanilla‐flavored sample was liked less (P < 0.05) than mixed‐flavored samples overall; when labeled, the naturally flavored and 1 of the mixed‐flavor ice creams were liked equally overall (P > 0.05). Products labeled “natural” (correctly or incorrectly) were liked more (P < 0.05) overall than products with other labels. When laboratory‐made ice creams (natural, artificial, mixed flavored) were evaluated, the labeled, naturally flavored sample was liked more than the unlabeled sample overall; when labeled, the artificially flavored ice cream was liked less than the unlabeled sample. Labeling was shown to affect consumer liking.  相似文献   
70.
Professor Aaron comments that this piece, excerpted from: “Bad News and the Fully Informed Client,” the first chapter of her book, Client Science, addresses the lawyer's challenge when counseling clients where “bad” news—negative, pessimistic or unwelcome developments or analysis—must be conveyed, whether or not within an ADR process. “As a mediator of civil cases, I suspect that mediation involves a higher than average percentage of cases involving ill‐counseled clients or ‘difficult clients’ who may fairly be characterized as ‘counseling‐resistant’ despite the best efforts of skilled lawyers. When the lawyer explains ‘bad news’ about case developments or likely outcomes, he risks the client's suspicion or accusation of less than zealous advocacy. While a mediator can assist with client communication when legal circumstances are grim, counsel are obligated to ensure their clients are well informed of realistic expectations when exercising autonomy and self determination.”  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号