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排序方式: 共有101条查询结果,搜索用时 15 毫秒
1.
Moghadam Seyedeh Hadis Ashofteh Parisa-Sadat Loáiciga Hugo A. 《Water Resources Management》2022,36(9):3181-3205
Water Resources Management - The water evaluation and planning (WEAP) approach and the invasive weed optimization algorithm (IWOA) are herein employed to determine the optimal operating policies in... 相似文献
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Xing Gu Shariar Sabuktagin Ali Teke Daniel Johnstone Hadis Morkoç Bill Nemeth Jeff Nause 《Journal of Materials Science: Materials in Electronics》2004,15(6):373-378
ZnO is a highly efficient photon emitter, and has optical and piezoelectric properties that are attractive for a variety of applications in sensors and potentially optoelectronic devices such as emitters. Due to its identical stacking order and close lattice match to GaN, it is also being developed as a substrate material for GaN epitaxy. However, the surface finish of the ZnO is such that much of the damage induced by sawing and follow up mechanical polishing remains. We developed a thermal treatment method to eliminate surface damage on the 0 face of ZnO (0 0 0 1) to prepare it for epitaxial growth. Atomic force microscopy images of ZnO (0 0 0 1) annealed at 1050 °C for 3 h etc. show that residual scratches from mechanical polishing are removed and atomically flat, terrace-like surfaces are attained. In addition, low-temperature photoluminescence and high-resolution X-ray diffraction measurements have been employed to investigate the effect of annealing on ZnO substrates. 相似文献
4.
Recent Advances in CNT-based FET Transistor Biosensors to Detect Biomarkers of Clinical Significance
Yupapin Preecha Mahesha C. R. Fouladi Hadis Hamidi Abdolsamad Farmani Ali 《SILICON》2022,14(15):9275-9281
Silicon - The development of advanced materials has attracted interest for promising novel applications in biosensing and realm of nanophotonics. This interest in nanoelectronics, and... 相似文献
5.
Hadis Mohajerani Majid Kholghi Abolfazl Mosaedi Raziyeh Farmani Amir Sadoddin Markus Casper 《Water Resources Management》2017,31(6):1859-1879
This paper presents management of groundwater resource using a Bayesian Decision Network (BDN). The Kordkooy region in North East of Iran has been selected as study area. The region has been sub-divided into three zones based on transmissivity (T) and electrical conductivity (EC) values. The BDN parameters: prior probabilities and Conditional Probability Tables - CPTs) have been identified for each of the three zones. Three groups of management scenarios have been developed based on the two decision variables including “Crop pattern” and “Domestic water demand” across the three zones of the study area: 1) status quo management for all three zones represent current conditions; 2) the effect of change in cropping pattern on management endpoints and 3) the effect of future increased domestic water demand on management endpoints. The outcomes arising from implementing each scenario have been predicted by use of the constructed BDN for each of the zones. Results reveal that probability of drawdown in groundwater levels of southern areas is relatively high compared with other zones. Groundwater withdrawal from northern and northwestern areas of the study area should be limited due to the groundwater quality problems associated with shallow groundwater of these two zones. The ability of the Bayesian Decision Network to take into account key uncertainties in natural resources and perform meaningful analysis in cases where there is not a vast amount of information and observed data available – and opportunities for enabling inputs for the analysis based partly on expert elicitation,emphasizes key advantages of this approach for groundwater management and addressing the groundwater related problems in a data-scarce area. 相似文献
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Wide bandgap nitride semiconductors have recently attracted a great level of attention owing to their direct bandgaps in the
visible to ultraviolet regions of the spectrum as emitters and detectors. Moreover, this material system with its favorable
hetero-junctions and transport properties began to produce very respectable power levels in microwave amplifiers. If and when
the breakdown fields achieved experimentally approach the predicted values, this material system would also be very attractive
for power switching devices. In addition to the premature breakdown, high concentration of defects, and inhomogeneities, a
number of scientific challenges remain including a clear experimental investigation of polarization effects. In this paper,
following a succinct review of the progress that has been made, spontaneous and piezoelectric polarization effects and their
impact on sample device-like hetero-structures will be treated.
Received: 5 April 1999 / Reviewed and accepted: 19 April 1999 相似文献
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Ü. Özgür X. Gu S. Chevtchenko J. Spradlin S. -J. Cho H. Morkoç F. H. Pollak H. O. Everitt B. Nemeth J. E. Nause 《Journal of Electronic Materials》2006,35(4):550-555
Thermal conductivities (κ) of melt-grown bulk ZnO samples thermally treated under different conditions were measured using
scanning thermal microscopy. Samples annealed in air at 1050°C for 3 h and treated with N-plasma at 750°C for 1 min. exhibited
κ=1.35±0.08 W/cm-K and κ=1.47±0.08 W/cm-K, respectively. These are the highest values reported for ZnO. Atomic force microscopy
(AFM) and conductive-AFM measurements revealed that surface carrier concentration as well as surface morphology affected the
thermal conductivity. 相似文献
10.
Ali Eatemadi Hadis Daraee Hamzeh Karimkhanloo Mohammad Kouhi Nosratollah Zarghami Abolfazl Akbarzadeh Mozhgan Abasi Younes Hanifehpour Sang Woo Joo 《Nanoscale research letters》2014,9(1):393
Current discoveries of different forms of carbon nanostructures have motivated research on their applications in various fields. They hold promise for applications in medicine, gene, and drug delivery areas. Many different production methods for carbon nanotubes (CNTs) have been introduced; functionalization, filling, doping, and chemical modification have been achieved, and characterization, separation, and manipulation of individual CNTs are now possible. Parameters such as structure, surface area, surface charge, size distribution, surface chemistry, and agglomeration state as well as purity of the samples have considerable impact on the reactivity of carbon nanotubes. Otherwise, the strength and flexibility of carbon nanotubes make them of potential use in controlling other nanoscale structures, which suggests they will have a significant role in nanotechnology engineering. 相似文献