全文获取类型
收费全文 | 117篇 |
免费 | 7篇 |
专业分类
电工技术 | 2篇 |
综合类 | 1篇 |
化学工业 | 41篇 |
金属工艺 | 1篇 |
机械仪表 | 5篇 |
能源动力 | 14篇 |
轻工业 | 1篇 |
无线电 | 5篇 |
一般工业技术 | 29篇 |
冶金工业 | 8篇 |
原子能技术 | 2篇 |
自动化技术 | 15篇 |
出版年
2024年 | 1篇 |
2023年 | 2篇 |
2022年 | 7篇 |
2021年 | 7篇 |
2020年 | 8篇 |
2019年 | 10篇 |
2018年 | 11篇 |
2017年 | 9篇 |
2016年 | 1篇 |
2015年 | 4篇 |
2014年 | 1篇 |
2013年 | 12篇 |
2012年 | 4篇 |
2011年 | 5篇 |
2010年 | 7篇 |
2009年 | 5篇 |
2008年 | 5篇 |
2007年 | 1篇 |
2006年 | 4篇 |
2005年 | 2篇 |
2004年 | 2篇 |
2003年 | 1篇 |
2002年 | 1篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1994年 | 1篇 |
1991年 | 1篇 |
1984年 | 1篇 |
1983年 | 3篇 |
1981年 | 2篇 |
排序方式: 共有124条查询结果,搜索用时 265 毫秒
1.
Anshuman Das Saroj Kumar Patel Bibhuti Bhusan Biswal 《Machining Science and Technology》2020,24(2):291-320
AbstractThe current research comprises of various machinability aspects of 4340 hardened alloy steel which are scrutinized with in context of improvements in main cutting force, tool flank wear, crater wear, surface roughness, micro-hardness, machined surface morphology, chip morphology, chip reduction coefficient and apparent coefficient of friction under three different cutting fluid applications i.e. compressed air, water soluble coolant and nanofluid (using eco-friendly radiator coolant as the base fluid and Al2O3 as the nanoparticle) using uncoated cermet cutting inserts and a comparative assessment was performed to select which fluid performed better in terms of various machining attributes among three cutting fluids. The minimum quantity lubrication technique (MQL) was used in which a smaller volume of coolant sprinkled at high pressure. This method is found as the most effective alternative to minimize health risks and machining costs, which is quite high in other setups. The test specimen was machined at three different cutting speeds i.e. 100, 120 and 140?m/min along with two machining parameters i.e. feed and depth of cut were kept constant respectively at 0.2?mm/rev and 0.4?mm. Outcomes made a conclusion that Al2O3 enriched ecofriendly nanocoolant outperformed both compressed air and water soluble coolant in terms of every machinability aspects. 相似文献
2.
Dipti Biswal 《Polymer》2006,47(21):7355-7360
A novel application of FTIR imaging for real-time characterization of patterning polymerization processes with microscale spatial resolution is presented. These methods will enable the microscale analysis of the reactions of polymeric systems with various substrates and devices. Specifically, intelligent hydrogels containing ionic groups (pH responsive) and poly(ethylene glycol) have been micropatterned onto gold surfaces, and the free-radical polymerization reaction has been characterized. It was demonstrated that differences in the reaction rates across a patterned region could be successfully resolved and characterized. This novel characterization method based on FTIR imaging will facilitate the optimization of integration processes of patterned polymeric films leading to enhanced (and reproducible) application of these materials as functional components in a variety of microdevices. 相似文献
3.
Extranasal Staphylococcus aureus colonization predisposes to bloodstream infections in patients on hemodialysis with noncuffed internal jugular vein catheters 下载免费PDF全文
Anand Devraj Venkata Siva Tez Pinnamaneni Manisha Biswal Raja Ramachandran Vivekanand Jha 《Hemodialysis international. International Symposium on Home Hemodialysis》2017,21(1):35-40
Introduction: Staphylococcal infection of endogenous origin is an important cause of morbidity and mortality in patients who receive hemodialysis (HD). The risk of such infections in nasal carriers of the organism is well defined. Extranasal carriage of the organism at extranasal sites may pose similar risks. Methods: A total of 70 patients about to undergo internal jugular vein catheterization for HD were enrolled in this prospective observational study. Swab cultures were obtained from anterior nares, posterior pharynx, axillae, toe web spaces, and vascular access sites at baseline and 1 week later. A patient was defined as a persistent carrier when the same organism was grown in both samples. Staphylococcus aureus bloodstream infections were assessed by blood and catheter tip cultures over a 90‐day period. Findings: The mean age of the patients was 43.71 ± 16.2 years. Persistent S. aureus carriage at anterior nares, throat, axilla, toe web spaces, vascular access site, and all sites was documented in 27.9%, 11.4%, 40%, 32.9%, 4.3%, and 64.2% of patients, respectively. Fifteen patients developed S. aureus infections. Catheter related S. aureus infections (CRI) were more likely in persistent carriers than nonpersistent carriers with odds ratios (95% CI) of 10.2 (2.8–37.1), 8.6 (1.7–42.2), 17.3 (3.4–86.0), 3.0 (0.9–9.8), and 1.9 (0.2–22.4) for anterior nares, throat, axilla, toe web spaces, and vascular access site carriers, respectively. The probability of developing CRI in persistent S. aureus carriers was 55% compared to none in noncarriers at 90 days (P = 0.04). Discussion: Extranasal S. aureus carriage is as significant a risk factor as nasal carriage for staphylococcal infections in patients on HD through catheters. The study is limited by lack of molecular phenotyping. 相似文献
4.
We investigate the role of interfacial slip on evaporation of a thin liquid film in a microfluidic channel. The effective
slip mechanism is attributed to the formation of a depleted layer adhering to the substrate–fluid interface, either in a continuum
or in a rarefied gas regime, as a consequence of intricate hydrophobic interactions in the narrow confinement. We appeal to
the fundamental principles of conservation in relating the evaporation mechanisms with fluid flow and heat transfer over interfacial
scales. We obtain semi-analytical solutions of the pertinent governing equations, with coupled heat and mass transfer boundary
conditions at the liquid–vapor interface. We observe that a general consequence of interfacial slip is to elongate the liquid
film, thereby leading to a film thickening effect. Thicker liquid films, in turn, result in lower heat transfer rates from
the wall to liquid film, and consequently lower mass transfer rates from the liquid film to the vapor phase. Nevertheless,
the total mass of evaporation (or equivalently, the net heat transfer) turns out to be higher in case of interfacial slip
due to the longer film length. We also develop significant physical insights on the implications of the relative thickness
of the depleted layer with reference to characteristic length scales of the microfluidic channel on the evaporation process,
under combined influences of the capillary pressure, disjoining pressure, and the driving temperature differential for the
interfacial transport. 相似文献
5.
Das Satish K. Nanda Umakanta Biswal Sudhansu M. Pandey Chandan Kumar Giri Lalat Indu 《SILICON》2022,14(6):2965-2973
Silicon - Short channel effects (SCEs) along with mobility degradation has a great impact on CMOS technology below 100 nm. These effects can be overcome by using gate and channel... 相似文献
6.
Synthesis of nano photocatalysts, LaFeO3 with orthorhombic perovskite structure by sol–gel auto-combustion method was demonstrated. The samples were characterized by PXRD, SEM, HRTEM, XPS and optical absorption studies. Photocatalytic water decomposition over LaFeO3 nanoparticles activated at various temperatures without any co-catalyst were investigated under visible light irradiation (λ >> 420 nm). Highest amount of H2 and O2 evolved in 180 min over the LaFeO3 activated at 500 °C was recorded to be 1290 μmol and 640 μmol, respectively having apparent quantum efficiency (AQE) 8.07%. The pronounced activity of nano LaFeO3 samples towards water decomposition was consistent with BET-surface area and particle size analyses. 相似文献
7.
Dipti Biswal 《Polymer》2011,52(26):5985-5992
A novel one-step method for the preparation of poly(β-amino ester) hydrogels has been developed. The one-step method utilizes a Michael type addition reaction between a difunctional diacrylate and a tetrafunctional primary diamine to create a crosslinked biodegradable hydrogel. It was shown that the molar ratio of the reactive acrylate to amine controlled the extent of polymerization and crosslinking density of the hydrogel system, which enabled for the end properties of the network (e.g., swelling, degradation, and mechanical) to be tuned. 相似文献
8.
Biobased polymeric flocculants for industrial effluent treatment 总被引:3,自引:0,他引:3
Ram?P.?SinghEmail author Bishwa?R.?Nayak Dipti?R.?Biswal Tridib?Tripathy Kaushik?Banik 《Materials Research Innovations》2003,7(5):331-340
Water is a scare commodity now. Recycling of municipal wastewater, industrial and mineral processing effluents require treatment with the inorganic or organic flocculants. Inorganic flocculants are used in large quantities, leave large amount of sludge and are very much affected by pH changes. Other polymeric flocculants are used in a very minute quantity, form large cohesive floc and are inert to pH changes. Both natural and synthetic polymers are used as flocculants. Natural polymers are biodegradable and are effective at very large dosages but are very shear stable. The synthetic polymers are highly effective flocculants at very small dosages and have high tailorability, but have poor shear stability. In the authors laboratory, a new class of flocculants has been developed by grafting polyacrylamide branches onto polysaccharide such as guargum, hydroxypropyl guargum, starch, amylopectin and sodium alginate. These grafted polysaccharides exhibit synergistic flocculation characteristics, shear stability and controlled biodegradability. Out of all the grafted polysaccharides, amylopectin grafted polysaccharides out performs most of the commercially available flocculants. The polacrylamide branches grafted on high molecular weight branched amylopectin have larger approachability to contaminants in the industrial effluents [1, 2]. 相似文献
9.
10.
Studies in the expansion behaviour of tapered fluidized bed systems are important for specifying the height of the bed. Data have been obtained on the expanded heights of tapered fluidized beds and bed expansion ratios for spherical and non-spherical particles have been calculated. Based on dimensional analysis, models have been developed as a function of geometry of tapered bed, static bed height, particle diameter, density of solid and gas and superficial velocity of the fluidizing medium. The data used to derive the models cover a wide range of operating conditions, with varying fluidization velocities. Effects of static bed height, particle diameter, density, tapered angle and superficial gas velocity over minimum fluidization velocity on bed expansion ratios have been investigated experimentally. A comparison has been made between the calculated values of bed expansion ratios using proposed models and the experimental data. It has been seen that calculated values by models agree well with the experimental values. Models have also been compared with literature data of conventional bed and found its applicability at higher gas velocities with good accuracy. 相似文献