全文获取类型
收费全文 | 645篇 |
免费 | 7篇 |
国内免费 | 5篇 |
专业分类
电工技术 | 20篇 |
综合类 | 11篇 |
化学工业 | 25篇 |
金属工艺 | 7篇 |
机械仪表 | 4篇 |
建筑科学 | 137篇 |
矿业工程 | 15篇 |
能源动力 | 107篇 |
轻工业 | 52篇 |
水利工程 | 58篇 |
石油天然气 | 14篇 |
武器工业 | 3篇 |
无线电 | 25篇 |
一般工业技术 | 66篇 |
冶金工业 | 50篇 |
原子能技术 | 4篇 |
自动化技术 | 59篇 |
出版年
2023年 | 5篇 |
2022年 | 3篇 |
2021年 | 14篇 |
2020年 | 20篇 |
2019年 | 14篇 |
2018年 | 25篇 |
2017年 | 19篇 |
2016年 | 27篇 |
2015年 | 21篇 |
2014年 | 37篇 |
2013年 | 81篇 |
2012年 | 31篇 |
2011年 | 42篇 |
2010年 | 43篇 |
2009年 | 33篇 |
2008年 | 41篇 |
2007年 | 38篇 |
2006年 | 30篇 |
2005年 | 19篇 |
2004年 | 13篇 |
2003年 | 4篇 |
2002年 | 17篇 |
2001年 | 9篇 |
2000年 | 6篇 |
1999年 | 10篇 |
1998年 | 4篇 |
1997年 | 8篇 |
1996年 | 4篇 |
1995年 | 5篇 |
1994年 | 3篇 |
1993年 | 3篇 |
1992年 | 4篇 |
1991年 | 4篇 |
1990年 | 1篇 |
1987年 | 2篇 |
1985年 | 5篇 |
1984年 | 2篇 |
1983年 | 4篇 |
1982年 | 1篇 |
1979年 | 3篇 |
1964年 | 1篇 |
1955年 | 1篇 |
排序方式: 共有657条查询结果,搜索用时 812 毫秒
611.
612.
Rasmussen Andrew; Rosenfeld Barry; Reeves Kim; Keller Allen S. 《Canadian Metallurgical Quarterly》2007,116(4):734
Torture survivors often report chronic debilitating physical and psychological distress. Prior research on the relationship between physical and psychological trauma suggests that the 2 are not independent. Injury sustained during torture may increase the likelihood of subsequent distress as either a moderator or mediator. For long-term psychopathology in a sample of Punjabi Sikh survivors of human rights violations (N = 116), chronic injuries mediated the path between torture and posttraumatic stress disorder, specifically the severity of numbing symptoms. Although injuries were associated with major depression, torture was not, and injuries did not moderate the relationship between major depression and torture. Chronic injuries may represent trauma severity or persistent traumatic cues. These findings emphasize connections between physical and psychological trauma and the importance of an interdisciplinary approach to torture treatment. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
613.
经济相对落后的印度1999年软件的总销售额达57亿美元,出口额达37亿美元,已成为全球重要的软件研发中心。印度在信息业崛起的原因可归纳为以下几点:政府政策的扶持;不断延伸的软件技术园区已形成的“硅谷”效应;国内外的人才支撑,市场竞争机制的引入;以及及时的法律保障。最后总结了印度的成功对我国发展信息产业的启示。 相似文献
614.
This paper reports on the effects of the great Sumatra earthquake and tsunami of December 26, 2004, in and around Port Blair, the capital city of the Andaman and Nicobar Islands, India. The earthquake shaking and subsequent tsunami caused substantial damage to structures that include buildings, harbors, overhead water tanks, seaport control towers, and so on. Other important structures, for example, dams, bridges, hangars, and so on, also suffered minor damage without disrupting their functioning. Reinforced concrete structures on the islands were the worst performers, while traditionally constructed timber and masonry structures performed well in response to ground shaking. The mandatory Indian Standards were not complied within the design of many recent structures on the islands located in the most severe seismic zone in India. 相似文献
615.
616.
结合印度电力监管委员会(central electricity authority,CEA)的2010版电站设计导则,依托印度某2×660MW超临界电站工程,对国内三大动力厂(上海汽轮机有限公司、东方汽轮机厂及哈尔滨汽轮机厂)的汽轮机主要技术特点进行分析总结,通过对机组优选的凝汽器背压进行技术经济比较,最后得出对于印度工程,600MW级机组均为基本负荷机组,机组设计背压定义为9.5kPa时经济性优于10.13kPa。研究结论供后续印方业主设计咨询项目参考和借鉴。 相似文献
617.
Since the seminal work of Archibugi and Michie (1995) on the globalization of innovation, several authors have attempted to understand the complex relationship between innovation and internationalization. However, most tend to focus on industrialized countries, just one mode of globalization of innovation and often one traditional indicator of innovation, such as patents or R&;D investment, thus ignoring the complexity and multiple aspects of the phenomenon. This paper explores empirically the linkages between different modes of globalization of innovation and firms' micro-characteristics in two of the fastest growing emerging economies. We analyze three distinct modes of globalization of innovation: the global exploitation of innovation, the global sourcing of technology and global research collaboration. We then use primary data from Chinese and Indian firms belonging to three sectors (automotive components, software and green biotech) to explore the differences in the ways in which the firms located in these two economies globalize their innovatiton activities. 相似文献
618.
Research on green supply chain management (GSCM) or sustainable supply chain management (SSCM) has attracted increased attention in recent years. Although GSCM/SSCM has been studied for developed and developing countries, there has been little information about the adoption of GSCM/SSCM practices in India. This article presents one of the earliest surveys on GSCM practices in Indian manufacturing firms. The items for the survey were developed based on the extant literature and feedback from corporates. Some of the major findings of the survey are as follows. We found that the state of adoption of GSCM practices by Indian firms was still in its infancy, the awareness of environmental sustainability was quite low among consumers, and the regulatory framework was also lacking in terms of promoting environmental sustainability. Results of data analysis showed that supplier collaboration for environmental sustainability had a positive impact on environmentally sustainable product design and logistics, which in turn was positively related to competitiveness and economic performance of the firm. We compared the results with the observations made by other researchers for developed and developing countries and provided managerial implications for the government and manufacturers as to what steps need to be taken to generate awareness towards environmental sustainability and facilitate the adoption of GSCM practices among Indian firms to a greater extent. We conclude the paper by indicating directions for future research on GSCM/SSCM. 相似文献
619.
Sankarasubbaiyan S Rajkumar A Tangalvadi TA Dawood US Kaur P 《Hemodialysis international. International Symposium on Home Hemodialysis》2007,11(4):485-491
Maintenance hemodialysis is a treatment modality available to few patients reaching end-stage renal disease in India. However, the morbidity and outcome of such treatment remains largely unknown. A retrospective cohort of patients commencing hemodialysis in a secondary care institution in India between January 1, 2002 and December 31, 2004 was studied. Patient demographics, cardiac status, access, hospitalizations, and emergency room visits were assessed and outcomes determined. During the study period, 95 patients (66 males, 29 females) commenced maintenance hemodialysis. The underlying cause of chronic kidney disease was diabetic nephropathy in 66.3% of patients. Cumulative follow-up was 676+9.1 patient months. The mean serum creatinine (+SD) at initiation of dialysis was 8.39+3.28 mg%. Thirty-six percent of patients had a functioning arteriovenous fistula at commencement of dialysis, while the remaining 64% of patients required temporary access. The mean number of comorbidities was 1.9+1.0/patient; diastolic dysfunction was deemed to be present in 20.4% of the patients. The hospitalization rate was 3.9/patient year; the number of visits to the emergency room was 4.9/patient year. Cardiac pathology was the most common cause leading to hospitalization and emergency room visits. Diabetic patients were older and had higher cardiac morbidity (p<0.01). The outcome was as follows: 39% transferred to other units; 27% died; 9% switched to CAPD; 8% lost to follow-up; 1% transplantation: Kaplan-Meier survival analysis showed a median survival of 410 days. Patients commencing hemodialysis in an urban dialysis center in South India are predominantly male and have significant comorbidity including diabetes and cardiac disease. Outcome is generally poor. Hence, a huge opportunity for improvement exists. 相似文献
620.
Sama Suresh Nirugatti Dinakar T. N. V. K. V. Prasad P. C. Nagajyothi Thoti Damodharam Arveti Nagaraju 《Mine Water and the Environment》2007,26(2):119-123
Abstract. An investigation was undertaken to determine the effects of a large barite mining operation on local ground water quality
near Mangampeta,Andhra Pradesh, India.Water samples were collected from drinking water wells in the mining and adjacent regions.
The drinking water in the mining region had sulphate concentrations that ranged from 211 to 589 mg/L, compared to sulphate
concentrations of 25 mg/L or less in the non-mined areas. The natural existence of barite and the widespread mine waste dumps
at Mangampeta are believed to be responsible for the higher levels of sulphate in the ground water. 相似文献