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稳定河道计算方法分析与比选 被引量:5
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作者 戴文鸿 闫志方 +2 位作者 陈奕 张松 沈余龙 《南水北调与水利科技》 CAS CSCD 北大核心 2015年第4期686-690,共5页
选取三种经典的稳定河道计算方法:Yalin和da Silva方法、Chang方法、Huang和Nanson方法,运用323组原型观测和水槽试验资料对不同方法进行了验证,并对其计算误差进行了定量分析比较。结果表明:对于稳定河宽和稳定水深的计算,精度最高的是... 选取三种经典的稳定河道计算方法:Yalin和da Silva方法、Chang方法、Huang和Nanson方法,运用323组原型观测和水槽试验资料对不同方法进行了验证,并对其计算误差进行了定量分析比较。结果表明:对于稳定河宽和稳定水深的计算,精度最高的是Yalin和da Silva方法,最低的是Chang方法;对于稳定比降的计算,精度最高的是Huang和Nanson方法,Yalin和da Silva方法稍显逊色。综合而言,Yalin和da Silva方法精度较高。 展开更多
关键词 稳定河道 形态预测 计算方法验证 误差分析 比选
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16Mn钢的氢渗透(Ⅱ)——表观氢扩散系数积分微分算法的验证及氢渗透对氢脆敏感性的影响 被引量:1
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作者 邱开元 魏宝明 方耀华 《南京化工学院学报》 1992年第1期6-12,共7页
用电化学方法研究16Mn钢的氢渗透行为。结果表明,表观氢扩散系数的积分微分算法简便易行,适用范围广;塑性变形既能捕获氢,又可将捕获的氢释放,但使表观氢扩散系数减小;正火加回火态16Mn钢的抗氢脆性能的改善与其氢扩散活化能的降低,表... 用电化学方法研究16Mn钢的氢渗透行为。结果表明,表观氢扩散系数的积分微分算法简便易行,适用范围广;塑性变形既能捕获氢,又可将捕获的氢释放,但使表观氢扩散系数减小;正火加回火态16Mn钢的抗氢脆性能的改善与其氢扩散活化能的降低,表观氢扩散系数的增大相对应。 展开更多
关键词 16MN钢 氢渗透 验证计算方法
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Verification of instruction set specification for an ASIP
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作者 纪金松 MAIER Stefan +1 位作者 聂晓宁 周学海 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2008年第4期482-486,共5页
In order to gain the great performance of ASIP, this paper discusses different aspects of an ASIP instruction set specification like syntax, encoding, constraints as welt as behaviors, and introduces our ADL model bas... In order to gain the great performance of ASIP, this paper discusses different aspects of an ASIP instruction set specification like syntax, encoding, constraints as welt as behaviors, and introduces our ADL model based methodology to check them. The automatic generation of test cases based on our straight-forward instruction representation is shown, and the efficient generation of them with good coverage is shown as well. The verification of the constraint checker, a very important tool for programmer, is performed. Results show that the toolkit can find some errors in previous delivery tools, and the introduced methodology verifies the feasibility of our instruction set specification. 展开更多
关键词 VERIFICATION ASIP instruction set specification ADL
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Simultaneous and interference-free determination of eleven nonsteroidal anti-inflammatory drugs illegally added into Chinese patent drugs using chemometrics-assisted HPLC-DAD strategy 被引量:2
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作者 Tong Wang Hai-Long Wu +5 位作者 Li-Xia Xie Zhi Liu Wan-Jun Long Li Cheng Yu-Jie Ding Ru-Qin Yu 《Science China Chemistry》 SCIE EI CAS CSCD 2018年第6期739-749,共11页
In this work, a smart strategy that combines three-way high performance liquid chromatography-diode array detection(HPLCDAD) data with second-order calibration method based on alternating trilinear decomposition(ATLD)... In this work, a smart strategy that combines three-way high performance liquid chromatography-diode array detection(HPLCDAD) data with second-order calibration method based on alternating trilinear decomposition(ATLD) algorithm was proposed for simultaneous determination of eleven non-steroidal anti-inflammatory drugs(NSAIDs) illegally added into Chinese patent drugs and health products. All target analytes were rapidly eluted out within 14.5 min under a simple gradient elution. With the aid of the prominent "second-order advantage" of the ATLD algorithm, three HPLC problems, i.e. peak overlaps, unknown interferences and baseline drift, could be mathematically calibrated, and pure signals of target analytes could be extracted out from heavy-interference but information-rich HPLC-DAD data. The average spiked recoveries for all target analytes were in the range of 95.9%–106.4% with standard deviations lower than 7.5%. Validation parameters including sensitivity(SEN), selectivity(SEL), limit of detection(LOD), limit of quantitation(LOQ) and precisions of intra-day and inter-day were calculated to validate the accuracy of the proposed method, quantitative results were further confirmed by the classic HPLC method, which proved that chemometrics-assisted HPLC-DAD analytical strategy was highly efficient, accurate and green for drug-abuse monitoring of NSAIDs in Chinese patent drugs and health products. 展开更多
关键词 non-steroidal anti-inflammatory drugs Chinese patent drugs high performance liquid chromatography-diode array detection second-order calibration alternating trilinear decomposition
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Numerical Investigation of an Oscillating Airfoil using Immersed Boundary Method 被引量:5
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作者 Guohua Zhong Lin Du Xiaofeng Sun 《Journal of Thermal Science》 SCIE EI CAS CSCD 2011年第5期413-422,共10页
Based on the immersed boundary method, a numerical simulation for an oscillating airfoil is established and a preliminary analysis of the oscillating airfoil is presented with an emphasis on the physical understanding... Based on the immersed boundary method, a numerical simulation for an oscillating airfoil is established and a preliminary analysis of the oscillating airfoil is presented with an emphasis on the physical understanding of fluid-structure interaction. In order to validate the method, two simulation cases: oscillating circular cylinder at low K-C number and two degrees of freedom oscillating cylinder are carded out first and the results are in good agreement with the previous re:searches. In the oscillating airfoil simulation, it is found that the reduced velocity U^*. is a very sensitive factor and especially U^*-2.8 is the critical stable boundary in the present work. The method shows the predominance of time saving in computational process for such a complicated fluid-structure interac- tion problem. 展开更多
关键词 TURBOMACHINERY IB method fluid-structure interaction.
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