全文获取类型
收费全文 | 174篇 |
免费 | 4篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 32篇 |
机械仪表 | 4篇 |
建筑科学 | 6篇 |
能源动力 | 6篇 |
轻工业 | 4篇 |
石油天然气 | 4篇 |
无线电 | 29篇 |
一般工业技术 | 67篇 |
冶金工业 | 13篇 |
自动化技术 | 12篇 |
出版年
2024年 | 1篇 |
2023年 | 2篇 |
2022年 | 3篇 |
2021年 | 3篇 |
2020年 | 5篇 |
2019年 | 4篇 |
2018年 | 5篇 |
2017年 | 4篇 |
2016年 | 3篇 |
2015年 | 11篇 |
2014年 | 10篇 |
2013年 | 12篇 |
2012年 | 10篇 |
2011年 | 8篇 |
2010年 | 6篇 |
2009年 | 8篇 |
2008年 | 5篇 |
2007年 | 7篇 |
2006年 | 8篇 |
2005年 | 7篇 |
2004年 | 6篇 |
2003年 | 3篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 6篇 |
1997年 | 5篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 6篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1987年 | 5篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1975年 | 2篇 |
排序方式: 共有178条查询结果,搜索用时 15 毫秒
21.
Pucha R.V. Hegde S. Damani M. Tunga K. Perkins A. Mahalingam S. Ramakrishna G. Lo G.C. Klein K. Ahmad J. Sitaraman S.K. 《Advanced Packaging, IEEE Transactions on》2004,27(2):438-452
The next-generation convergent microsystems, based on system-on-package (SOP) technology, require up-front system-level design-for-reliability approaches and appropriate reliability assessment methodologies to guarantee the reliability of digital, optical, and radio frequency (RF) functions, as well as their interfaces. Systems approach to reliability requires the development of: i) physics-based reliability models for various failure mechanisms associated with digital, optical, and RF Functions, and their interfaces in the system; ii) design optimization models for the selection of suitable materials and processing conditions for reliability, as well as functionality; and iii) system-level reliability models understanding the component and functional interaction. This paper presents the reliability assessment of digital, optical, and RF functions in SOP-based microsystems. Upfront physics-based design-for-reliability models for various functional failure mechanisms are presented to evaluate various design options and material selection even before the prototypes are made. Advanced modeling methodologies and algorithms to accommodate material length scale effects due to enhanced system integration and miniaturization are presented. System-level mixed-signal reliability is discussed thorough system-level reliability metrics relating component-level failure mechanisms to system-level signal integrity, as well as statistical aspects. 相似文献
22.
23.
M Mahalingam A Pozniak TJ McManus G Senaldi D Vergani M Peakman 《Canadian Metallurgical Quarterly》1996,81(2):210-214
Systemic chemotherapy with 5-fluorouracil (5-FU) has been the mainstay of treatment for patients with metastatic colorectal carcinoma. Administering the drug in a continuous low-dose schedule has produced better result than bolus therapy. Resistance to short-pulse treatment can also be overcome by prolonged exposure. Recent studies suggest the feasibility of biomodulation of 5-FU with recombinant interferon (rIFN alpha-2a) with improved response. Sixteen patients were treated with continuous 5-FU 250 mg/m2 and rIFN alpha-2a 10 x 10(6) u thrice weekly for a maximum of 24 weeks. Five of them had received bolus 5-FU previously. Nine (82%) of the chemonaive group and 1 (20%) previously treated patient had partial response. The median duration of response was 7 months. Grade II to III mucositis were seen in 44% of the patients and 2 patients developed neurological complications. Although the overall response appeared encouraging, the incidence of toxicity was high. In the absence of further phase III studies, rIFN alpha-2a biomodulation of 5-FU cannot be regarded as standard treatment for patients with metastatic colorectal carcinoma. 相似文献
24.
J. R. Meyer K. A. Harris R. W. Yanka L. M. Mohnkern A. R. Reisinger J. F. Egler K. Mahalingam N. Otsuka 《Journal of Electronic Materials》1995,24(5):707-712
Infrared photoluminescence (PL) measurements were performed on (2ID-oriented superlattices with energy gaps in the range 110–495
meV. Most of the samples with thinner HgTe quantum wells displayed two PL peaks separated by Δhω ≈ 30–65 meV (which generally
increased with decreasing well thickness). Both peak energies (Ep) sometimes varied gradually with location on the surface, and in one case three peaks of approximately equal spacing were
observed in some locations. The data are consistent with a model which assumes the presence of randomly distributed islands
having well thicknesses varying by approximately one monolayer. We find that Ahco and the variations of the spectra with temperature
agree well with calculations based on this simple model. 相似文献
25.
26.
A fixed-bed coal gasification reactor was set up which specifically simulated the devolatilization zone in a gasifier. Samples (100 g) of lignite coal in three size ranges; ?2+1 mm, ?3+2 mm and ?4+3 mm, were devolatilized in the temperature range 350–550 °C with a steam-oxygen mixture, at 1 atm. The effect of these operating variables on tar yield and composition, melting point, viscosity, specific gravity, and molecular weight distribution was determined. A first-order reaction model was fitted to the experimentally observed total loss in weight of the lignite. 相似文献
27.
V. Dhanasekaran T. Mahalingam R. Chandramohan J. P. Chu Jin-Koo Rhee 《Journal of Materials Science: Materials in Electronics》2012,23(2):645-651
The effects of deposition potentials on the electrochemical, structural, morphological and optical properties of the CdSnSe
films are studied. X-ray diffraction patterns revealed a mix of cubic and orthogonal phases for the grown CdSnSe thin films.
The refractive index, extinction coefficient, dielectric constant and thereby the optical band gap of the films are calculated
from transmittance spectral data recorded in the range 400–1,200 nm by UV–Vis–NIR Spectrometer. The optical band gap energy
of CdSnSe thin films is found to be in the range of 1.23–1.25 eV. Morphological studies revealed nano-rod shaped grains occupied
over the entire surface of the film with average grain size of 150 nm. The influence of deposition potential on the microstructural
properties of CdSnSe is also explained in the paper. 相似文献
28.
Three-dimensional models with irregular grain geometries and appropriate physical properties are needed to investigate fracture in polycrystalline metals and alloys. Creating such models is challenging but achievable using a two-stage process, suitable for any polycrystal. The processes described in this paper are illustrated by examples of brittle fracture in ferritic steel, zinc and nickel. The predicted crack path in a model is compared with the grain boundary fracture seen in three point bend specimens of nickel embrittled by sulphur. 相似文献
29.
30.
In this paper, coupled higher order nonlinear Schrödinger–Maxwell–Bloch equations are studied for the ultrashort pulse propagation in erbium-doped birefringent fiber system. Lax pair is constructed for the CHNLS–MB system. Through the Darboux method and symbolic computation, analytic two-soliton solution is obtained. To analyze the specific problem, we design an optimal system by properly choosing the special form of variable coefficients. Here, using obtained two-soliton solution, tunneling of femtosecond soliton through barrier and well is investigated. While solitons are passing through barrier and well, some unexpected behavior is observed and hidden possibilities in switching action through tunneling is investigated. 相似文献