全文获取类型
收费全文 | 732篇 |
免费 | 17篇 |
专业分类
电工技术 | 4篇 |
化学工业 | 34篇 |
金属工艺 | 16篇 |
机械仪表 | 8篇 |
建筑科学 | 21篇 |
矿业工程 | 1篇 |
能源动力 | 6篇 |
轻工业 | 50篇 |
水利工程 | 1篇 |
石油天然气 | 3篇 |
无线电 | 19篇 |
一般工业技术 | 49篇 |
冶金工业 | 514篇 |
原子能技术 | 3篇 |
自动化技术 | 20篇 |
出版年
2022年 | 2篇 |
2021年 | 2篇 |
2020年 | 5篇 |
2019年 | 3篇 |
2018年 | 9篇 |
2017年 | 7篇 |
2016年 | 10篇 |
2015年 | 4篇 |
2014年 | 11篇 |
2013年 | 28篇 |
2012年 | 17篇 |
2011年 | 7篇 |
2010年 | 13篇 |
2009年 | 9篇 |
2008年 | 8篇 |
2007年 | 8篇 |
2006年 | 7篇 |
2005年 | 6篇 |
2004年 | 4篇 |
2003年 | 5篇 |
2001年 | 3篇 |
2000年 | 5篇 |
1999年 | 9篇 |
1998年 | 148篇 |
1997年 | 88篇 |
1996年 | 75篇 |
1995年 | 44篇 |
1994年 | 29篇 |
1993年 | 25篇 |
1992年 | 9篇 |
1991年 | 5篇 |
1990年 | 11篇 |
1989年 | 6篇 |
1988年 | 4篇 |
1987年 | 2篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 8篇 |
1981年 | 7篇 |
1980年 | 12篇 |
1978年 | 3篇 |
1977年 | 25篇 |
1976年 | 41篇 |
1975年 | 5篇 |
1972年 | 2篇 |
1970年 | 4篇 |
1968年 | 1篇 |
1966年 | 1篇 |
1954年 | 1篇 |
1948年 | 2篇 |
排序方式: 共有749条查询结果,搜索用时 15 毫秒
101.
AV Vatazin AI Lobakov RS Tishenina IV Krivtsova ZR Karichev ME Vishnevski? IuV Vasin GA Drozdova 《Canadian Metallurgical Quarterly》1997,(3):45-49
Small-flow membranous oxygenation of the blood was used in 45 patients with peritonitis in the multiple organ failure phase. In ten cases blood oxygenation was combined with hemofiltration. MOCT 19-03 (Kvant Research and Production Unit) and Gambro FH hemofilters (Sweden) were employed. Combination of small-flow membranous oxygenation of the blood combined with hemofiltration appreciably improved the oxygen-transporting function of the blood in adult patients with the respiratory distress syndrome, which was due to mutual potentiation of the two methods' effects. Small-flow membraneous oxygenation alone improved cellular immunity and decreased the laboratory manifestations of endogenous intoxication due to biotransformation of toxic products. 相似文献
102.
Neuronal responses of the cat LGB to light spots the area of which was changing in time with different speed, were studied. All the neurons responding to switching on and off of the test spot respond to changing in time of the spot area too. The on-neurons respond to enlargening of the area while the off-neurons - to its reducing. The on- and off-responses of these fields occurred at the moment of passing of the margin of reducing (growing) spot across a certain point of neuron's receptive field. This point changed when the speed of reducing (growing) of the test spot changed. 相似文献
103.
BRIAN CHAMBERS EDGAR CHAMBERS IV JANE A. R. BOWERS JEAN A. CRAIG 《Journal of food science》1991,56(1):200-209
Sodium tripolyphosphate (STP) at levels of 0.1, 0.2, 0.3, 0.4, and 0.5% by weight was added to ground turkey meat to determine if a flavor difference could be detected when STP was present. Detection thresholds for STP in ground turkey meat were determined for 30 female respondents. Two population thresholds were determined using information from the detection thresholds. Two-thirds of the respondents detected a difference between samples with no STP and those with 0.5% STP or less. STP added at less than 0.3% was undetected by more than 50% of the tested population. 相似文献
104.
105.
106.
V.S. Bagotzky M.R. Tarasevich K.A. Radyushkina O.A. Levina S.I. Andrusyova 《Journal of power sources》1978,2(3):233-240
The electrochemical performances of carbon gas—diffusion oxygen electrodes in acid solution were investigated. Active carbon AG-3 was promoted with 5 – 10 wt.% organic complexes of cobalt (phthalocyanine, tetraphenylporphin, tetrabenzoporphin, tetra(p-metoxyphenyl)porphin); Teflon was used as binder. It was shown that a heat treatment of the mixture of carbon with the organic complexes of cobalt in an inert gas atmosphere at 800 – 900 °C significantly improves the stability of the catalyst. Oxygen electrodes with this catalyst operated in sulphuric acid solution for several thousand hours without any deterioration. 相似文献
107.
108.
IuV Dumanski? GG Psaras VG Bondar IV Nikulin VG Sugoniaka 《Canadian Metallurgical Quarterly》1993,(3):37-39
An immediate result of surgical treatment of gastric stump cancer in 68 patients is presented. The resectability rate was 23.5%. Lethality after radical operations was 18.7%, after symptomatic operations and exploratory laparotomy-9.6%. Gastric resection was performed, using the method developed in the clinic with wrapping the anastomosis, or gastric stump by a loop of the afferent intestine. In development of gastric stump cancer, local spreading of a tumor is not a reason to discard performance of radical operation. 相似文献
109.
LA Durnov BM Belkina VG Poliakov GV Goldobenko IV Glekov 《Canadian Metallurgical Quarterly》1996,(10):28-33
A comprehensive programme was developed for the treatment of uni- and bilateral retinoblastoma in children with due regard to the disease stage by the TNM system. The use of the current sources of teletherapy and cyclic polychemotherapy expanded indications for organ-saving therapy at most common stages. Treatment by the program was performed in 202 patients, including 125 children with unilateral damage and 77 with bilateral damage. An attempt made treat 140 (75%) children at the first stage. More than 70% of cases were diagnosed as having disease stage T3 in one or two stage, while such patients underwent ocular enucleation. A complete or partial (more than 50%) tumor regression without signs of its progression for 2 years or more was achieved in 62% of cases. At the first stage of therapy, conservative therapy insignificantly affected the children's longevity in uncomplicated cases, which is particularly important in bilateral involvement, while this preserved the organ of vision in more than half the patients (62%). Five-year survival was 92 and 82% in unilateral retinoblastoma surgically treated and untreated, 83 and 84%, respectively. Adequate multimodality treatment brought about low incidence rates of recurrence and metastasis (10%) in conservative therapy and 7.7% among all patients. 相似文献
110.
Immunogenetic examination comprising determination of erythrocyte antigens (ABO systems and resus-factor) and leukocytes (HLA system) using hemagglutination and compliment-dependent cytotoxicity, respectively, was performed for 138 patients with chronic recurrent pancreatitis, 52 patients with chronic pancreatitis and 456 healthy subjects. Analysis of relations between the above antigens, the disease risk, clinical and laboratory parameters, readings of ultrasound histogram and the efficacy of treatment helped discover not only provoking and protecting genes, but also some pathogenetic mechanisms involved in genetic predisposition. These findings may be used in the choice of treatment policy and to upgrade the significance of prognosis of principal forms of chronic pancreatitis. 相似文献