全文获取类型
收费全文 | 265篇 |
免费 | 24篇 |
国内免费 | 2篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 89篇 |
金属工艺 | 6篇 |
机械仪表 | 12篇 |
建筑科学 | 14篇 |
能源动力 | 10篇 |
轻工业 | 10篇 |
石油天然气 | 2篇 |
无线电 | 35篇 |
一般工业技术 | 66篇 |
冶金工业 | 8篇 |
自动化技术 | 38篇 |
出版年
2024年 | 1篇 |
2023年 | 7篇 |
2022年 | 2篇 |
2021年 | 8篇 |
2020年 | 6篇 |
2019年 | 8篇 |
2018年 | 10篇 |
2017年 | 6篇 |
2016年 | 11篇 |
2015年 | 11篇 |
2014年 | 14篇 |
2013年 | 27篇 |
2012年 | 16篇 |
2011年 | 17篇 |
2010年 | 17篇 |
2009年 | 19篇 |
2008年 | 24篇 |
2007年 | 11篇 |
2006年 | 8篇 |
2005年 | 8篇 |
2004年 | 3篇 |
2003年 | 4篇 |
2002年 | 5篇 |
2001年 | 6篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 3篇 |
1996年 | 1篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1982年 | 3篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1978年 | 2篇 |
1976年 | 1篇 |
1973年 | 1篇 |
1972年 | 4篇 |
1971年 | 1篇 |
1949年 | 1篇 |
1929年 | 1篇 |
排序方式: 共有291条查询结果,搜索用时 31 毫秒
21.
Cedric L. Briens 《Powder Technology》1990,60(3):281-282
22.
Carmen Martín-Hernández Marta Muñoz Cedric Daury Hans Weymuth Anna E.M. Kemmers-Voncken Vicente Corbatón Tomás Toribio Maria G.E.G. Bremer 《International Dairy Journal》2009,19(4):205-208
An immunochromatographic lateral-flow test dipstick test was developed for the fast detection of bovine rennet whey in liquid milk and milk powder. The test is based on the binding of casein glycomacropeptide (cGMP) by two specific anti-bovine κ-casein monoclonal antibodies and has a visual detection limit of around 15 ng mL?1 for cGMP and 1% (v/v) for rennet whey in milk using standards and spiked samples. The dipstick performance was evaluated in a collaborative trial using skim milk powder and raw, pasteurized and UHT milk. The suitability of the dipstick was demonstrated in comparison with gel permeation-high performance liquid chromotography and a colorimetric method, by analysing 60 raw milk samples collected from farms in Brazil. The dipstick results correlated well with the HPLC results and were more reliable than those obtained with the colorimetric method. The dipstick test correctly identified all raw milk samples with a rennet whey content above 4%. 相似文献
23.
Cedric Cocaud Aaron Price Amor Jnifene Hani Naguib 《International Journal of Mechanics and Materials in Design》2006,3(3):223-236
This paper presents a study on the potential application of artificial muscles based on shape memory alloys as linear robotic
actuators. An extended discussion on various control techniques and ways of biologically inspired muscle arrangements is presented.
A two DOF experimental robotic arm was built and used to test the performance of the proposed artificial muscle configurations,
and a biologically inspired control strategy using a rule-base concept was developed and tested using the two DOF experimental
robotic arm. 相似文献
24.
V. S. Ermachenko F. B. Yurevich M. N. Rolin A. Ya. Venger V. N. Borisyuk 《Journal of Engineering Physics and Thermophysics》1978,35(3):1060-1064
A magnetoplasmadynamic source of output up to 400 kW is described, and measurements on the major electrical and thermal characteristics are reported.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 35, No. 3, pp. 459–465, September, 1978. 相似文献
25.
Mathematical models of silica deposition are derived using the method of characteristics for the problem of variable rate injection into a well producing radially symmetric flow. Solutions are developed using the first order rate equation of silica deposition suggested by Rimstidt and Barnes (1980). The changes in porosity and permeability resulting from deposition are included in the models. The models developed are successfully applied in simulating the changes in injection capacity in some of the reinjection wells in Tongonan geothermal field, Philippines. 相似文献
26.
M. N. Rolin N. L. Yadrevskaya 《Journal of Engineering Physics and Thermophysics》1988,55(5):1241-1244
Formulas are proposed for the computation of the radiation heat transfer at the frontal point of an axisymmetric blunt body with a carbon-based destructible coating around which a hypersonic air stream flows.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 55, No. 5, pp. 763–767, November, 1988. 相似文献
27.
Male rats implanted with cannula tips placed above the nucleus of the solitary tract (NTS) were trained to obtain food pellets placed in 2 arms of a Y-maze and then given a footshock in 1 arm of the maze. Ss then received bilateral injections of lidocaine or buffer into the NTS and peripheral injections of saline or epinephrine (0.01 or 0.05 mg/kg, intraperitoneally [ip]). Two tests were given 24 and 48 hrs after training to assess retention in the presence and absence of contextual cues (the stainless steel floor) associated with the footshock training trial. Epinephrine (0.05 mg/kg) produced a significant enhancement in retention, which was attenuated by injections of lidocaine into the NTS. These findings indicate that the NTS is involved in mediating the memory-modulating effects of peripheral epinephrine and that such effects are initiated at least in part by activation of vagal afferents projecting to the NTS. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
28.
Biochar, unwashed and washed with a solution of Triton and hydrogen peroxide, was wet drum granulated using molasses binder solutions. Unwashed biochar was very hydrophobic and granulation proceeded through forming liquid marbles and layering. Washing reduced the hydrophobicity of the biochar. The effectiveness of the wash depended on the biochar source; it significantly reduced the hydrophobicity of biochar from woodchips and moderately reduced the hydrophobicity of biochar from flower digestate. Therefore, washed biochar from woodchips was granulated using a hydrophilic mechanism, while washed biochar from digestate was granulated according to a combination mechanism of liquid marbles collapsing and then coalescing. The change in granulation mechanism produced stronger and denser granules with higher yields of granules in the 1–4 mm optimal size range. Washing and then granulating biochar created a product that could be further tailored for optimal soil amendment. 相似文献
29.
30.
A model was developed to study the drying rate of biopolymer films. The diffusivity of water in this biopolymer film is an exponential function of the water concentration. This creates a situation where simply increasing gas velocity can decrease the actual drying rate. The model revealed that the main factor limiting the drying of the biopolymer film was a significant and rapid decrease in the diffusivity of water through the film as the film dried. To avoid this a pulsing scheme was proposed where the velocity of the drying gas would be varied during the experiment; this variation allowed for a compromise between a high overall drying rate and maintaining a high diffusivity within the film. It was found that the optimum combination of gas velocities was 0.8 and 0.6 m/s with a duration of 10 min at the high and low gas velocities. 相似文献