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   98篇
  免费   6篇
  国内免费   4篇
综合类   3篇
化学工业   22篇
金属工艺   5篇
机械仪表   2篇
建筑科学   6篇
矿业工程   2篇
能源动力   4篇
轻工业   32篇
石油天然气   5篇
武器工业   1篇
无线电   5篇
一般工业技术   13篇
冶金工业   1篇
自动化技术   7篇
  2021年   6篇
  2020年   4篇
  2018年   5篇
  2017年   6篇
  2016年   4篇
  2015年   1篇
  2014年   3篇
  2013年   9篇
  2012年   6篇
  2011年   12篇
  2010年   6篇
  2009年   4篇
  2008年   2篇
  2007年   7篇
  2006年   5篇
  2005年   1篇
  2004年   5篇
  2003年   5篇
  2002年   4篇
  2001年   3篇
  2000年   1篇
  1999年   2篇
  1998年   1篇
  1996年   4篇
  1995年   1篇
  1982年   1篇
排序方式: 共有108条查询结果,搜索用时 31 毫秒
91.
The high‐sulfur gas sweetening process is energy consuming. To analyze its energy efficiency effectively, and look for ways to improve this process, a novel energy‐efficiency evaluation method based on the yield‐energy‐selectivity and efficiency coefficient methods was proposed. First, the yield, energy, and selectivity are selected as evaluation indicators to establish the yield‐energy‐selectivity evaluation model. Then, the coefficient and score of each indicator were determined by using the analytical hierarchy process and efficacy coefficient method, respectively. Finally, the proposed energy‐efficiency evaluation method was applied to the actual high‐sulfur gas sweetening process. The evaluation results were in good agreement with those obtained by actual experiences.  相似文献   
92.
目的探讨花红片治疗急性盆腔炎的疗效。方法60例急性盆腔炎患者随机分为治疗组和对照组,每组30例,对照组给予抗生素,治疗组在对照组的基础上给予花红片治疗,观察2组的疗效。结果患者宫颈分泌物细菌培养以需氧菌最多,血抗体检测以沙眼衣原体最多。治疗组总有效率(96.7%)高于对照组(83.3%),差异具有统计学意义(P<0.05)。治疗组不良反应的发生率较低。结论花红片治疗急性盆腔炎临床疗效较好,且副反应较轻微。  相似文献   
93.
PDP efficacy improvement factors are investigated. It is found that key elements for a high discharge efficiency are: a high Xe partial pressure combined with phosphor materials which show little saturation at high VUV load. In a color test panel a white luminance of 3500 cd/m2 and an efficacy of 4 lm/W is realized for sustaining at 225 V.  相似文献   
94.
Contaminated produce has been identified as the cause of several listeriosis outbreaks in recent years. Listeria monocytogenes is widely distributed in the environment and complete prevention of produce contamination is therefore challenging. Mitigation options that reduce contamination on produce are valuable, especially for produce commodities that are commonly consumed fresh or minimally processed. We performed a systematic review and meta-analysis of the available peer-reviewed literature to evaluate the efficacy of liquid fresh produce wash compounds in reducing produce contamination with L. monocytogenes, and derive quantitative estimates of treatment efficacy for a variety of common liquid fresh produce wash compounds. Treatment efficacy differed considerably across produce commodities, with liquid fresh produce wash compounds generally showing considerably greater efficacy for some tested commodities than for other commodities. Most but not all of the evaluated liquid fresh produce wash compounds were significantly more effective in reducing L. monocytogenes contamination than water alone, with mean reductions in L. monocytogenes levels ranging from less than 1 log10 cfu to more than 5 log10 cfu. Liquid fresh produce wash compounds are therefore a possible tool for reducing contamination with L. monocytogenes, for certain produce commodities.  相似文献   
95.
办公建筑是企事业单位人员从事各 类业务活动的重要场所。办公建筑的室内光 环境质量将直接影响人员的视觉功效和视力 健康,对提高办公场所的人居环境健康具 有重要意义。本文通过28名被试者对安菲莫 夫表读取完成时间和正确率的数据分析,结 合主观问卷调查反馈数据,结果发现:视觉 功效与垂直照度具有密切相关性;垂直照度 在300-600 lx区段内,21—40岁的人的舒适 度较高;不同年龄段对最佳垂直照度的需求 不同,性别对舒适度影响较小。本文对提升 办公场所室内光环境质量,优化办公照明设 计,改善办公场所人居环境,具有重要的指 导价值,同时将提高学者对垂直照度的关注 度,对未来照明建筑一体化概念的提出具有 重要意义。  相似文献   
96.
《工程(英文)》2021,7(11):1529-1540
The prosperity of the biotherapeutics market reflects the feasibility and effectiveness of therapeutic antibodies for the treatment of cancers, inflammatory disorders, and refractory infections. As drawbacks emerge in clinical trials and practice, such as impeded binding, reduced effector functions, and frequent adverse reactions, modifications of therapeutic antibodies are unprecedently burgeoning in research and development (R&D). These modifications include: ① modified glycosylation; ② fragment of crystallizable domain (Fc) amino acid alterations; ③ cross-isotype or cross-subclass exchanges; ④ antibody–drug conjugates (ADCs); ⑤ single chain of variable region fragment (scFv) for chimeric antigen receptor T (CAR-T) cells; and ⑥ bispecific antibodies (bsAbs) in order to promote binding affinity, half-life in circulation, effectiveness toward target cells and, ultimately, to achieve overall improved efficacy. While many achievements have been made around the world in the past decades, China has been playing an active role in this realm, with its great demand for biotherapeutics with R&D potential. This review recapitulates the international progress that has been achieved with modified therapeutic antibodies, and then focuses on that of China in an independent section.  相似文献   
97.
绩效管理是一个全员、全过程、多维度的管理体系,是人力资源管理的核心。绩效管理登录中国之后,已经得到了广泛应用。但是很多企业的绩效管理并没有达到预期目标并逐渐沦为"鸡肋"。其原因分析包括绩效管理没有得到企业高层的重视和支持、绩效文化没有得到建立等方面。在应对措施方面,要重视战略目标与绩效管理的融合、企业文化与绩效文化的融合、企业发展与员工发展的融合等。  相似文献   
98.
Kirschner, Paas, and Kirschner (2009c) used the theoretical framework of cognitive load to explain why the learning of a group of collaborating individuals was more efficient than that of individuals learning alone with high-complexity tasks but not with low-complexity tasks. The authors argued that collaboration circumvented the limitations of an individual’s working memory by creating an expanded cognitive capacity and by allowing for the distribution of cognitive load among group members. Inspired by research on efficacy, this study explored an alternative affective explanation of the results. By measuring the amount of mental effort learners expected to invest in working on a learning task before actually carrying out the task, this study showed that learners who had to collaboratively solve a high-complexity problem expected to invest less mental effort than learners who had to solve the problem alone. When confronted with low-complexity tasks, the expected amount of mental effort did not differ.  相似文献   
99.
对化妆品的生物物理学功效评价方法进行了综述,重点介绍了保湿、防晒、美白和皮肤表面轮廓的评价方法,另外还对皮肤表面油脂、除臭止汗剂、皮肤清洗和皮肤弹性的评价方法进行了简要介绍.  相似文献   
100.
为了研究不同治疗抑郁症的药物(利血平、开郁安神胶囊)对抑郁症的治疗效果,用SOM和K-Means相结合的方法对用药后的抑郁症大鼠DNA的芯片样本进行聚类。结果表明,将K-Means用于收敛后的SOM网络,不仅较好地解决了SOM在训练样本后边界不清的问题,也将样本的训练结果映射在二维,有利于对聚类结果的呈现。此外,改进的算法能较好地解决K-Means对初始质心的选择难、对聚类类别的定量难等问题。  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