全文获取类型
收费全文 | 115篇 |
免费 | 4篇 |
专业分类
电工技术 | 3篇 |
化学工业 | 15篇 |
机械仪表 | 2篇 |
建筑科学 | 2篇 |
能源动力 | 17篇 |
轻工业 | 13篇 |
水利工程 | 2篇 |
石油天然气 | 1篇 |
无线电 | 11篇 |
一般工业技术 | 35篇 |
冶金工业 | 4篇 |
自动化技术 | 14篇 |
出版年
2024年 | 1篇 |
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2018年 | 5篇 |
2017年 | 3篇 |
2016年 | 1篇 |
2015年 | 3篇 |
2014年 | 5篇 |
2013年 | 6篇 |
2012年 | 4篇 |
2011年 | 6篇 |
2010年 | 5篇 |
2009年 | 7篇 |
2008年 | 8篇 |
2007年 | 11篇 |
2006年 | 6篇 |
2005年 | 6篇 |
2004年 | 4篇 |
2003年 | 2篇 |
2002年 | 8篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1999年 | 3篇 |
1998年 | 1篇 |
1997年 | 3篇 |
1996年 | 5篇 |
1995年 | 3篇 |
1993年 | 1篇 |
1990年 | 2篇 |
1983年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有119条查询结果,搜索用时 968 毫秒
61.
Zubaidi Salah L. Ortega-Martorell Sandra Kot Patryk Alkhaddar Rafid M. Abdellatif Mawada Gharghan Sadik K. Ahmed Maytham S. Hashim Khalid 《Water Resources Management》2020,34(3):1265-1279
Water Resources Management - The accurate forecast of water demand is challenging for water utilities, specifically when considering the implications of climate change. As such, this is the first... 相似文献
62.
We present an overview of the properties and applications of optical bistability in vertical-cavity semiconductor optical amplifiers (VCSOAs). The basic physics and analytical models of this optical nonlinearity are discussed. Experimental results obtained from a VCSOA operated in the 850 nm wavelength region are presented. Counterclockwise hysteresis loops are obtained over a range of initial phase detuning and bias currents. One hysteresis loop is observed experimentally with an input power as low as 2 muW when the device is biased at 98% of its lasing threshold. Numerical simulations based on the Fabry-Perot resonator model and rate equations we developed show good agreement with our experimental observations. In addition, a low input intensity high contrast (10:1) optical and gate and 2R regeneration are demonstrated. We believe that bistable VCSOAs can significantly advance the prospect of a dense two-dimensional array of low-switching-intensity all-optical logic and memory elements. 相似文献
63.
We present an optical spatial filtering device that has been integrated into a microfluidic system and whose motion and alignment is controlled using a laser optical tweezer. The lithographically patterned micro-optical spatial filter device filters out higher frequency additive noise components by automatically aligning itself in three dimensions to the focus of the laser beam. This self-alignment capability is achieved through the attachment of a refractive optical element directly over the circular aperture or pinhole of the spatial filter. A discussion of two different spatial filter designs is presented along with experimental results that demonstrate the effectiveness of the self-aligned micro-optic spatial filter. 相似文献
64.
W.T. Lim P.W. Sadik D.P. Norton B.P. Gila S.J. Pearton I.I. Kravchenko F. Ren 《Journal of Electronic Materials》2008,37(2):161-166
The use of Ir diffusion barriers in Ni/Au-based Ohmic contacts to p-type CuCrO2 layers was investigated. A specific contact resistance of ~5 × 10−4 Ω cm2 was achieved after annealing at 500°C for the Ir-containing contacts, and the contacts were rectifying for lower anneal temperatures.
In this case, the contact resistance was basically independent of the measurement temperature, indicating that tunneling is
the dominant transport mechanism in the contacts. The morphology for the Ir-containing contacts was still smooth at 500°C
although Auger electron spectroscopy depth profiling showed that some of the nickel had diffused to the surface and had oxidized.
Contacts annealed at 800°C showed that some copper and most of the nickel had diffused to the surface and oxidized. The presence
of the Ir diffusion barrier does increase the thermal stability of the contacts by ∼200°C compared to conventional Ni/Au contacts.
By contrast, the use of other materials such as TaN, ZrN, and W2B5 as the diffusion barrier led to poorer thermal stability, with the contact resistance increasing sharply above 400°C. 相似文献
65.
Novel strategies are providing a more comprehensive and refined basis for understanding the occurrence and effects of endocrine disrupters. 相似文献
66.
Alsanad Hamid R. Sadik Amin Z Ucan Osman N. Ilyas Muhammad Bayat Oguz 《Multimedia Tools and Applications》2022,81(18):26185-26198
Multimedia Tools and Applications - Drones are currently being used in a wide range of useful tasks that are too dangerous or/and expensive to be performed by humans. However, this is increasingly... 相似文献
67.
Kikandi SN Okello VA Wang Q Sadik OA Varner KE Burns SA 《Environmental science & technology》2011,45(12):5294-5300
This paper presents the first development of a mass-sensitive nanosensor for the isolation and quantitative analyses of engineered fullerene (C??) nanoparticles, while excluding mixtures of structurally similar fullerenes. Amino-modified beta-cyclodextrin (β-CD-NH?) was synthesized and confirmed by 1HNMR as the host molecule to isolate the desired fullerene C??. This was subsequently assembled onto the surfaces of gold-coated quartz crystal microbalance (QCM) electrodes using N-dicyclohexylcarbodiimide/N-hydroxysuccinimide (DCC/NHS) surface immobilization chemistry to create a selective molecular configuration described as (Au)-S-(CH?)2-CONH-beta-CD sensor. The mass change on the sensor configuration on the QCM was monitored for selective quantitative analysis of fullerene C?? from a C??/C?? mixture and soil samples. About ~101?-101? C?? particles/cm2 were successfully quantified by QCM measurements. Continuous spike of 200 μL of 0.14 mg C?? /mL produced changes in frequency (-Δf) that varied exponentially with concentration. FESEM and time-of-flight secondary-ion mass spectrometry confirmed the validity of sensor surface chemistry before and after exposure to fullerene C??. The utility of this sensor for spiked real-world soil samples has been demonstrated. Comparable sensitivity was obtained using both the soil and purified toluene samples. This work demonstrates that the sensor has potential application in complex environmental matrices. 相似文献
68.
Recovery of Drug Delivery Nanoparticles from Human Plasma Using an Electrokinetic Platform Technology
下载免费PDF全文
![点击此处可从《Small (Weinheim an der Bergstrasse, Germany)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Stuart Ibsen Avery Sonnenberg Carolyn Schutt Rajesh Mukthavaram Yasan Yeh Inanc Ortac Sareh Manouchehri Santosh Kesari Sadik Esener Michael J. Heller 《Small (Weinheim an der Bergstrasse, Germany)》2015,11(38):5088-5096
The effect of complex biological fluids on the surface and structure of nanoparticles is a rapidly expanding field of study. One of the challenges holding back this research is the difficulty of recovering therapeutic nanoparticles from biological samples due to their small size, low density, and stealth surface coatings. Here, the first demonstration of the recovery and analysis of drug delivery nanoparticles from undiluted human plasma samples through the use of a new electrokinetic platform technology is presented. The particles are recovered from plasma through a dielectrophoresis separation force that is created by innate differences in the dielectric properties between the unaltered nanoparticles and the surrounding plasma. It is shown that this can be applied to a wide range of drug delivery nanoparticles of different morphologies and materials, including low‐density nanoliposomes. These recovered particles can then be analyzed using different methods including scanning electron microscopy to monitor surface and structural changes that result from plasma exposure. This new recovery technique can be broadly applied to the recovery of nanoparticles from high conductance fluids in a wide range of applications. 相似文献
69.
The solid oxide fuel cell (SOFC) is one of the most promising fuel cells for direct conversion of chemical energy to electrical energy with the possibility of its use in co-generation systems because of the high temperature waste heat. Various mathematical models have been developed for three geometric configurations (tubular, planar, and monolithic) to solve transport equations coupled with electrochemical processes to describe the reaction kinetics including internal reforming chemistry in SOFCs. In recent years, considerable progress has been made in modeling to improve the design and performance of this type of fuel cells. The numbers of the contributions on this important type of fuels have been increasing rapidly. The objective of this paper is to summarize the present status of the SOFC modeling efforts so that unresolved problems can be identified by the researchers. 相似文献
70.
M S Sadik J T Huber K King R Wanderley D DeYoung A al-Dehneh C Dudas 《Journal of dairy science》1990,73(3):694-702
Three lactating Holstein cows fitted with duodenal cannulae were fed diets containing cottonseed meal, corn gluten meal, or blood meal as protein supplements in a 3 c 3 Latin square experiment. Diets averaged 15% CP and were 60% concentrate, 31% corn silage, and 9% alfalfa hay. The flow marker was Cr2O3; the bacterial protein fraction of digesta CP was estimated by 15N (as ammonium sulfate) and diaminopimelic acid. The undegraded fraction of total feed protein entering the duodenum for respective diets was .52, .57, and .69. The 15N method was less variable than diaminopimelic acid. Based on 15N, percentage of bacterial of total protein differed among treatments (61.5, 59.4, and 55.0, respectively). Ten percent more protein entered the duodenum on blood meal than other diets, but differences were not significant. Protein sources were similar in microbial passage, but degraded protein was used most efficiently for microbial synthesis on blood meal. Incorporation of 15N consumed into bacterial protein ranged from 50 to 83% with numerically highest values on blood meal, suggesting greater efficiency of ammonia, capture. Recoveries of 15N for the 72 h as milk, feces and urine ranged from 54 to 78%. 相似文献