|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 基于风机主动控制的风电场低电压穿越能力深度挖掘研究显示文摘该文基于具备低电压穿越能力的风机在部分电压扰动场景下仍无法成功穿越的场景分析,研究提出风电场内双馈风机可用无功与异步风机无功负荷的协调控制策略。该策略通过列写各风机的电压约束方程并在二维平面上求解可行域,得出最小脱网台数下的无功增发与切机策略,实现多场景电压扰动下风电场低电压穿越能力的进一步挖掘提升,通过对实际风电场的仿真分析,验证了所提策略的有效性。 | 林湘宁 卓毅鑫 李正天 童宁 徐铝洋 张伟 M.Shoaib Khalid | 2017 | 中国电机工程学报2017，37，15： | 5 |
| 2 | 一种计及等效损伤载荷约束的风机黏性控制策略显示文摘恶劣风况下,风电场将因风机过风速保护相继动作而发生功率陡降甚至风电机组大规模脱网,严重影响电网的安全稳定运行。针对此问题,构建了风电机组的安全运行载荷约束条件,提出一种计及等效损伤载荷约束的黏性控制策略。所提策略能够在不改变风机原有机械控制系统的基础上,根据运行风况实时调节风机功率,追踪风机等效损伤载荷约束,使载荷维持在相应风况下的安全边界内,在充分利用风机的载荷承受能力的前提下最大化维持风电场功率输出,以实现降低恶劣风况下风电场功率陡降风险的目标。通过算例仿真与策略对比,验证了所提策略的有效性和优越性。 | 林湘宁 丁苏阳 张哲原 卓毅鑫 李正天 谭爱国 M.Shoaib Khalid Owolabi Sunday Adio | 2018 | 中国电机工程学报2018，38，7： | 1 |
| 3 | Analytical approach to entropy generation and heat transfer in CNT-nanofluid dynamics through a ciliated porous medium显示文摘The transportation of biological and industrial nanofluids by natural propulsion like cilia movement and self-generated contraction-relaxation of flexible walls has significant applications in numerous emerging technologies. Inspired by multi-disciplinary progress and innovation in this direction, a thermo-fluid mechanical model is proposed to study the entropy generation and convective heat transfer of nanofluids fabricated by the dispersion of single-wall carbon nanotubes(SWCNT) nanoparticles in water as the base fluid. The regime studied comprises heat transfer and steady, viscous, incompressible flow, induced by metachronal wave propulsion due to beating cilia, through a cylindrical tube containing a sparse(i.e., high permeability) homogenous porous medium. The flow is of the creeping type and is restricted under the low Reynolds number and long wavelength approximations. Slip effects at the wall are incorporated and the generalized Darcy drag-force model is utilized to mimic porous media effects. Cilia boundary conditions for velocity components are employed to determine analytical solutions to the resulting non-dimensionalized boundary value problem. The influence of pertinent physical parameters on temperature, axial velocity, pressure rise and pressure gradient, entropy generation function, Bejan number and stream-line distributions are computed numerically. A comparative study between SWCNT-nanofluids and pure water is also computed. The computations demonstrate that axial flow is accelerated with increasing slip parameter and Darcy number and is greater for SWCNT-nanofluids than for pure water. Furthermore the size of the bolus for SWCNT-nanofluids is larger than that of the pure water. The study is applicable in designing and fabricating nanoscale and microfluidics devices, artificial cilia and biomimetic micro-pumps. | Noreen Sher Akbar M.Shoaib Dharmendra Tripathi Shashi Bhushan O.Anwar Bég | 2018 | Journal of Hydrodynamics2018，30，2： | 1 |
| 4 | Prospective evaluation of relatives for familial arrhythmogenic right ventricular cardiomyopathy/dysplasia reveals a need to broaden diagnostic criteria显示文摘 | M.Shoaib Hamid Mark Norman Asifa Quraishi Sami Firoozi Rajesh Thaman Juan R Gimeno Bhavesh Sachdev Edward Rowland Perry M Elliott William J McKenna | 2002 | Journal of the American College of Cardiology2002，，8： | 1 |
| 5 | Nitriding of Aluminium Alloy in Nitrogen and Nitrogen-Helium Mixture Using 100 Hz-Pulsed DC Glow Discharge显示文摘Nitriding of aluminium alloy (AlFe_(1.8)Zn_(0.8)) in nitrogen and nitrogen-helium mixturewas carried out by using 100 Hz-pulsed DC glow discharge. Samples are treated for differentdurations, namely 4 h, 8 h and 12 h, in nitrogen plasma as well as in a mixture of nitrogenheliumplasma for the same processing duration of 4 h. All nitriding treatments are carried out atan input power of 100 W, filling pressure of 1 mbar and substrates temperature of 250℃. X-raydiffraction (XRD) results show an expansion in lattice spacing and consequently shift of diffractionpeaks towards lower angle with the addition of helium in nitrogen plasma. Surface morphology ofthe treated sample is investigated by scanning electron microscopy (SEM) and energy dispersiveX-ray analysis (EDX). Vickers micro-hardness testing results show increases in surface hardnesswith processing duration as well as with the addition of helium in nitrogen plasmas. This increaseof surface hardness may be attributed to the diffusion of nitrogen content in the surface layergenerating internal stresses. It is observed that the addition of helium positively affects thenitriding of samples. | Nasrullah KHAN M.SHOAIB SHAH R.AHMAD | 2010 | Plasma Science and Technology2010，12，4： | 0 |
| 6 | Physical,Thermal and Partial Discharge Evaluation of Nano Alumina Filled Silicone Rubber in an Inclined Plane Test显示文摘Silicone rubber(SiR)composite material is a modern-day insulator for high voltage outdoor applications.The imperfection attributed to SiR is its weak resistance to tracking and erosion when exposed to an outdoor polluted environment which reduces its operational lifetime.This paper investigates the performance of SiR with the addition of 0,1,2.5,5,10 and 20%by weight contents of nano alumina(Al_(2)O_(3)).Inclined plane tests are performed according to IEC 60587 using the step up tracking voltage method with an initial voltage of 3.0 kV and the contaminant solution flow rate is maintained at 0.3 ml/min using a peristaltic pump.The applied voltage level is increased at a rate of 0.25 kV/h.Results suggest that physical tracking,erosion,RMS leakage current and surface partial discharge(PD)performance of samples is improved with the addition of nano alumina.The tracking length,eroded mass,RMS leakage current and average PD magnitude are measured 22%,79%,30%and 52%lesser in 20 wt%relative to 0 wt%,respectively.A thermal distribution analysis is undertaken with infrared camera and it is discovered that heat is accumulated in the discharge area of the liquid flow.The maximum temperature on the insulating specimen is decreased with increasing nanofiller contents.The above promising findings can be due to better thermal stability with low chain mobility at the interaction zone of SiR and alumina.Moreover,less liquid evaporation due to better thermal conduction and improved physical bonding between SiR and nano alumina are possible reasons behind the excellent performance of nanocomposites. | M.Tariq Nazir Faizan Tahir Butt Haider Hussain B.Toan Phung Shakeel Akram M.Shoaib Bhutta Ghulam Yasin | 2022 | CSEE Journal of Power and Energy Systems2022，8，4： | 0 |
| 7 | Comparative study of Sm^(3+) ions doped phosphate based oxide and oxy-fluoride glasses for solid state lighting applications显示文摘The physical and luminescent properties of Sm^(3+)-doped oxide and oxy-fluoride phosphate glasses were investigated. The glass samples with chemical composition of 69 P_2 O_5-10 BaO-10 ZnO-10 Gd_2 O_3-1 Sm_2 O_3 and 69 P_2 O_5-10 BaO-10 ZnO-10 GdF_3-1 Sm_2 O_3 were prepared by conventional melt quenching technique. The prepared glass samples were characterized with density, molar volume, refractive index,FTIR, UV-Vis-NIR, photo luminesce nce, radio luminescence, decay time profile and CIE diagram. The density and refractive index of the oxide glass have higher values as compared to the oxy-fluoride glass.The FTIR spectra show the reduction of O-H group in oxy-fluoride glass. The characteristic peaks of Sm^(3+)are observed at 360,372,402,438,419,473,944,1077,1227,1373,1474,1529 and 1585 nm in UV-VIS-NIR spectra. These peaks are related respectively to the transitions from ground state ~6 H_(5/2) to ~4 D_(3/2), ~6 P_(7/2),6 P3/2, ~4 I_(11/2), ~6 F_(11/2), ~6 F_(9/2), ~6 F_(7/2),~6 F_(5/2),~6 F_(3/2), ~6 H_(15/2) and ~6 F_(1/2) excited states. From photoluminescence and radio-luminesce nce it is observed that the oxy-fluoride glass samples show better emission intensity than the oxide glass. The Judd-Ofelt theory(J-0 theory) was used to find J-O intensity Ω_λ(λ = 2,4 and 6)parameters and radiative properties such as transition probability, stimulated emission cross section and branching ratios for titled glasses. The trend observed in the J-O parameters is Ω_4 >Ω_2 >Ω_6. The transition probability,emission cross section and branching ratio have the highest values for the ~4 G_(5/2)→~6 H_(7/2)transition. The CIE coordinates of the prepared glass samples are positioned in the orange region and the CCT value is 3776.105 for oxide and oxyfluoride glass. The oxy-fluoride glass has shorter decay time as compared to the oxide glass and it is recorded to be 1.62 and 1.32 ms for oxide and oxy-fluoride respectively. According to the results obtained in this work, it is obvious that these glass samples can be good candidate materials for producing cool orange light. | M.Shoaib G.Rooh R.Rajaramakrishna N.Chanthima N.Kiwsakunkran H.J.Kim J.Kaewkhao S.Tuscharoen | 2019 | Journal of Rare Earths2019，37，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员