全文获取类型
收费全文 | 178篇 |
免费 | 0篇 |
专业分类
化学工业 | 5篇 |
机械仪表 | 1篇 |
石油天然气 | 2篇 |
无线电 | 1篇 |
一般工业技术 | 6篇 |
冶金工业 | 162篇 |
自动化技术 | 1篇 |
出版年
2013年 | 1篇 |
2012年 | 1篇 |
2010年 | 1篇 |
2005年 | 1篇 |
2003年 | 2篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1999年 | 3篇 |
1998年 | 51篇 |
1997年 | 29篇 |
1996年 | 24篇 |
1995年 | 7篇 |
1994年 | 7篇 |
1993年 | 6篇 |
1992年 | 4篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 4篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1977年 | 5篇 |
1976年 | 20篇 |
1975年 | 1篇 |
排序方式: 共有178条查询结果,搜索用时 10 毫秒
71.
IV Poddoubnyi AF Dronov OI Blinnikov AN Smirnov IA Darenkov KA Dedov 《Canadian Metallurgical Quarterly》1998,33(8):1194-1197
PURPOSE: The technique and outcome of minimally invasive laparoscopic treatment of various forms of intussusception in children after ineffective attempt at conservative treatment are described. METHODS: Ninety-eight patients from 2 months to 11 years of age were analyzed. RESULTS: Suggested scheme of surgical treatment using laparoscopic technique was successful in 64 patients (65.3%), and conversion to open procedure occurred in 34 (34.7%). There was no mortality or intraoperative complications in our series. CONCLUSION: Practically every form of intussusception without bowel necrosis, including the most complex forms, can be reduced now using modern videolaparoscopic equipment and atraumatic instruments. 相似文献
72.
SN Shchelkunov PF Safronov AV Totmenin OI Riazankina NA Petrov VV Gutorov LS Sandakhchiev 《Canadian Metallurgical Quarterly》1998,360(5):702-705
OBJECTIVE: Esophageal adenocarcinoma is increasing in white men. We sought to identify trends in esophageal cancer in different patient groups in our region. METHODS: We reviewed the records of all patients with esophageal cancer seen at two hospitals in Columbia, SC between 1981 and 1995. Patients were divided into three cohorts (1981-1985, 1986-1990, and 1991-1995). Demographic data, histological type, tumor stage, grade, and survival were recorded. RESULTS: Histology was available in 371 of 386 patients (cohort 1, 113 patients; cohort 2, 144; and cohort 3, 114). Adenocarcinoma accounted for 24%, 27%, and 49% of esophageal cancer in white men in cohorts 1, 2, and 3, respectively (p = 0.03). Corresponding figures for African-Americans were 10%, 7%, and 3% (p = 0.22). Women comprised 8%, 14%, and 22% of patients with squamous carcinoma in the three cohorts (p = 0.03). Median survival for esophageal cancer was 6.0, 6.8, and 10.4 mo in cohorts 1, 2, and 3 (p = 0.0002). CONCLUSION: Adenocarcinoma is increasing in whites. Squamous carcinoma remains the predominant type in this region, seen mainly in African-Americans. Esophageal squamous carcinoma is increasing in women. The mean age at diagnosis of squamous carcinoma has decreased in whites. There is a trend toward improved survival in patients with esophageal cancer. 相似文献
73.
VI Rusyn VI Smolanka VV Korsak GV Ardel'ianova IuA Levchak AV Rusyn OI Tsurko 《Canadian Metallurgical Quarterly》1997,(7-8):71-73
Using intraoperative monitoring of the blood flow linear speed in a. cerebralis media while total a. carotis interna occlusion in 10 patients the authors have concluded, that the degree of blood flow compensation in a. cerebralis media depends not only on collateral compensation possibilities by the contralateral side and rate of it inclusion, but largely-on a. carotis externa possibility on the lesion side. 相似文献
74.
OI Golikova 《Canadian Metallurgical Quarterly》1998,(3):18-20
Normally the rat gingival microcirculatory bed is represented by superficial capillaries, postcapillaries, arterioles, and venules of different diameters. The major changes characterizing microcirculation disorders in experimental periodontitis are edema, arteriolar constriction and dilatation, stasis, and thrombosis, which undergo variously directed shifts in different periods of pathological process. 相似文献
75.
76.
本文对采用过二硫酸铵 (NH4) 2 S2 O8法从 Li Mn2 O4中萃取锂离子进行了研究 ,并就所获得吸附剂 (Mn O2 (Li) )的特性 ,特别是对于分离锂同位素的能力进行了测试。在良好的控制条件下 ,(NH4) 2 S2 O8是一种优良的锂吸附剂 ,它具有非常高的锂萃取度 ,同时保持锰的最小溶解性。所制备的 Mn O2 (Li)在 2 5°C时最大的 7Li/ 6Li同位素分离因子为 1 .0 1 4,它是那些商品有机离子交换剂的几倍。 相似文献
77.
78.
GB Fedoseev AIu Smirnov A Zukhe?r OA Ivanova OI Smirnova EF Alekseeva AA Totolian 《Canadian Metallurgical Quarterly》1996,68(8):28-31
In 10 patients with bronchial asthma (BA) treated conventionally (control group), 10 BA patients on absolute diet therapy (group 1) and 10 BA patients in absolute diet therapy combined with wheat herb juice (group 2) tolerance to 12 antibiotics of different classes and some immunity factors were determined using a complex of diagnostic methods. The latter implies: case history, humoral and cell immunity defense system tests and special tests (chemical erythrograms and leukocyte migration inhibition test in plane capillary tubes with tested drugs). The data obtained evidence for increased tolerance of the antibiotics in groups 1 and 2 as well as for changes in humoral defense system, especially in immunoglobulin E. The drug tolerance may be a therapeutic criterion of absolute diet therapy in bronchial asthma patients. 相似文献
79.
80.