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An Explanation of the Temperature-Dependent Upper Critical Field Data of H3S on the Basis of the Thermodynamics of a Superconductor in a Magnetic Field
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作者 Gulshan Prakash Malik 《World Journal of Condensed Matter Physics》 CAS 2024年第3期45-50,共6页
Excellent fits to a couple of the data-sets on the temperature (T)-dependent upper critical field (Hc2) of H3S (critical temperature, Tc ≈ 200 K at pressure ≈ 150 GPa) reported by Mozaffari, et al. (2019) were obtai... Excellent fits to a couple of the data-sets on the temperature (T)-dependent upper critical field (Hc2) of H3S (critical temperature, Tc ≈ 200 K at pressure ≈ 150 GPa) reported by Mozaffari, et al. (2019) were obtained by Talantsev (2019) in an approach based on an ingenious mix of the Ginzberg-Landau (GL), the Werthamer, Helfand and Hohenberg (WHH), and the Gor’kov, etc., theories which have individually been employed for the same purpose for a long time. Up to the lowest temperature (TL) in each of these data-sets, similarly accurate fits have also been obtained by Malik and Varma (2023) in a radically different approach based on the Bethe-Salpeter equation (BSE) supplemented by the Matsubara and the Landau quantization prescriptions. For T TL, however, while the (GL, WHH, etc.)-based approach leads to Hc2(0) ≈ 100 T, the BSE-based approach leads to about twice this value even at 1 K. In this paper, a fit to one of the said data-sets is obtained for the first time via a thermodynamic approach which, up to TL, is as good as those obtained via the earlier approaches. While this is interesting per se, another significant result of this paper is that for T TL it corroborates the result of the BSE-based approach. 展开更多
关键词 h3S Upper Critical field (hc2) Variation of hc2 with Temperature Clausius-Clapeyron equation in a magnetic field Behavior of hc2 for Temperatures Close to 0 K
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热轧H型钢不同冷却方式的温度场研究及优化
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作者 肖金福 白宇 +1 位作者 张宏亮 王卫卫 《山西冶金》 CAS 2024年第7期38-40,43,共4页
轧后对H型钢进行控制冷却,既能提高强度,又可以节约能源。为了改善热轧H型钢轧后冷却温度场,采用有限元数值模拟不同控冷工艺下的热轧H型钢温度场,并通过差别冷却方式获得相对均匀的温度场。结果表明,针对性地对H型钢圆角加强冷却后,H... 轧后对H型钢进行控制冷却,既能提高强度,又可以节约能源。为了改善热轧H型钢轧后冷却温度场,采用有限元数值模拟不同控冷工艺下的热轧H型钢温度场,并通过差别冷却方式获得相对均匀的温度场。结果表明,针对性地对H型钢圆角加强冷却后,H型钢断面整体温度分布比较均匀,6 s冷却后,腹板和圆角的温差小于45℃。 展开更多
关键词 h型钢 控制冷却 有限元 温度场
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湘东北万古金矿田江东金矿床成因——流体包裹体和H-O同位素制约
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作者 袁梓焜 邵拥军 +2 位作者 刘清泉 张毓策 王智琳 《黄金科学技术》 CSCD 北大核心 2024年第4期559-578,共20页
万古地区金矿床成矿流体的性质、来源和演化以及矿床成因类型尚存在争议。本次选择万古地区的江东金矿床,系统开展了不同阶段石英的SEM-CL分析、流体包裹体显微测温、激光拉曼光谱分析以及H-O同位素测试。流体包裹体测试结果表明,成矿... 万古地区金矿床成矿流体的性质、来源和演化以及矿床成因类型尚存在争议。本次选择万古地区的江东金矿床,系统开展了不同阶段石英的SEM-CL分析、流体包裹体显微测温、激光拉曼光谱分析以及H-O同位素测试。流体包裹体测试结果表明,成矿流体由中温、中—低盐度的H_(2)O-NaCl-CO_(2)体系逐渐演化为中—低温、中—低盐度的H_(2)O-NaCl体系。H-O同位素测试结果表明:岩浆流体是主要的成矿流体来源,可能来源于燕山期的岩浆活动。金在成矿流体中主要以Au(HS)_(2)^(-)形式运移,流体不混溶作用和水—岩反应可能是金沉淀的主要机制。综合江东金矿床地质特征、流体包裹体特征和H-O同位素研究结果,认为其属于与岩浆活动有关的岩浆热液型金矿床。 展开更多
关键词 流体包裹体 h⁃O同位素 成矿流体 江东金矿床 万古金矿田 湘东北
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滑坡面瑞雷波波场模拟及H/V谱比探测
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作者 王芃 邵广周 +3 位作者 恒翔天 蓝笛瑄 王国顺 霍科宇 《吉林大学学报(地球科学版)》 CAS CSCD 北大核心 2024年第3期1031-1041,共11页
滑坡是一种分布广泛、数量众多、危害巨大的地质灾害,准确确定滑坡滑动面对滑坡防治具有重大意义。传统的勘探手段,如钻探和地球物理方法在起伏较大的滑坡地形中具有诸多限制。本文以四川省屏山县东池庄滑坡为参考,建立了起伏地形软弱... 滑坡是一种分布广泛、数量众多、危害巨大的地质灾害,准确确定滑坡滑动面对滑坡防治具有重大意义。传统的勘探手段,如钻探和地球物理方法在起伏较大的滑坡地形中具有诸多限制。本文以四川省屏山县东池庄滑坡为参考,建立了起伏地形软弱性土质滑坡模型,进行了瑞雷波波场模拟并经过模式分离后计算求得水平/垂直(H/V)谱比曲线。对比分析了波场传播及H/V谱比曲线的特征,发现在110道检波器排列中,中心部位检波器的峰值频率可作为计算土石分界面的卓越频率。设计了土层厚度分别为25、31、35 m的滑坡模型,发现土层厚度与峰值频率呈负相关关系。给出了地层为黏性土与泥岩时的频率-深度经验公式,得到了连续滑动面信息,经验公式计算结果与实际模型吻合较好。 展开更多
关键词 软弱性滑坡 h/V谱比曲线 波场模拟 峰值频率
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A Dynamical Approach to the Explanation of the Upper Critical Field Data of Compressed H3S
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作者 Gulshan Malik Vijaya S. Varma 《World Journal of Condensed Matter Physics》 2023年第3期79-89,共11页
Excellent fits were obtained by Talantsev (MPLB 33, 1950195, 2019) to the temperature (T)-dependent upper critical field (H<sub>c</sub><sub>2</sub>(T)) data of H<sub>3</sub>S report... Excellent fits were obtained by Talantsev (MPLB 33, 1950195, 2019) to the temperature (T)-dependent upper critical field (H<sub>c</sub><sub>2</sub>(T)) data of H<sub>3</sub>S reported by Mozaffari et al. [Nature Communications 10, 2522 (2019)] by employing four alternative phenomenological models, each of which invoked two or more properties from its sample-specific set S<sub>1</sub> = {T<sub>c</sub>, gap, coherence length, penetration depth, jump in sp.ht.} and a single value of the effective mass (m*) of an electron. Based on the premise that the variation of H<sub>c</sub><sub>2</sub>(T) is due to the variation of the chemical potential μ(T), we report here fits to the same data by employing a T-, μ- and m*-dependent equation for H<sub>c</sub><sub>2</sub>(T) and three models of μ(T), viz. the linear, the parabolic and the concave-upward model. For temperatures up to which the data are available, each of these provides a good fit. However, for lower values of T, their predictions differ. Notably, the predicted values of H<sub>c</sub><sub>2</sub>(0) are much higher than in any of the models dealt with by Talantsev. In sum, we show here that the addressed data are explicable in a framework comprising the set S<sub>2</sub> = {μ, m*, interaction parameter λ<sub>m</sub>, Landau index N<sub>L</sub>}, which is altogether different from S<sub>1</sub>. 展开更多
关键词 Compressed h2S Upper Critical Magnetic field Pairing Equation Incorporating Temperature Chemical Potential and Magnetic field Temperature Dependence of the Chemical Potential
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用于小口径5 T磁共振成像系统的梯度线圈和^(1)H/^(13)C双共振射频线圈研制
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作者 易鹏 曹丽 +7 位作者 黄臻 程鑫 王佳鑫 陈黎 陈方 鲍庆嘉 张志 刘朝阳 《波谱学杂志》 CAS 2024年第3期245-256,共12页
基于自主研制的5 T磁共振成像系统和^(13)C代谢磁共振成像研究需求,设计了一种小口径磁共振成像梯度线圈和^(1)H/^(13)C双共振射频线圈系统.其中梯度线圈设计采用有限差分流函数方法,射频线圈设计为马鞍线圈结合表面线圈的双共振方案.... 基于自主研制的5 T磁共振成像系统和^(13)C代谢磁共振成像研究需求,设计了一种小口径磁共振成像梯度线圈和^(1)H/^(13)C双共振射频线圈系统.其中梯度线圈设计采用有限差分流函数方法,射频线圈设计为马鞍线圈结合表面线圈的双共振方案.采用有限元方法对磁场分布进行了数值模拟分析,成功研制出一套用于小口径5 T^(13)C磁共振成像的梯度与射频线圈,并利用自主研制的5 T磁共振成像系统平台验证了设计方案的可行性,经过实验测试采集到^(13)C标记的尿素水模磁共振图像和小鼠头部^(1)H磁共振图像,为后续开展基于动态核极化的^(13)C磁共振代谢成像奠定了基础. 展开更多
关键词 高场磁共振成像 ^(13)C代谢磁共振成像 梯度线圈 ^(1)h/^(13)C双共振线圈 马鞍线圈 表面线圈
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SSCNETⅢ/H总线在自动车载组装设备中的设计与应用
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作者 王芳 《电子工业专用设备》 2024年第3期55-59,共5页
基于工业自动化的发展方向,介绍了第三代高速伺服系统控制网络SSCNETⅢ/H系统的基本原理和SSCNETⅢ/H总线在工业设备中应用的优势,阐述了SSCNETⅢ/H总线在全自动车载组装生产线设备中的设计与应用,对实现工业设备智能化具有重要的现实... 基于工业自动化的发展方向,介绍了第三代高速伺服系统控制网络SSCNETⅢ/H系统的基本原理和SSCNETⅢ/H总线在工业设备中应用的优势,阐述了SSCNETⅢ/H总线在全自动车载组装生产线设备中的设计与应用,对实现工业设备智能化具有重要的现实意义。 展开更多
关键词 车载 第三代高速伺服系统控制网络 现场总线 可编程控制器
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Growth Rate of a-Si∶H Film Influenced by Magnetic Field Gradient in MWECR CVD Plasma System 被引量:2
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作者 胡跃辉 吴越颖 +3 位作者 陈光华 王青 张文理 阴生毅 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2004年第6期613-619,共7页
The magnetic field profiles,which are produced by three ways in the deposition chamber and plasma chamber of single coil divergent field MWECR CVD system,are investigated.The magnetic field gradient of these magnetic ... The magnetic field profiles,which are produced by three ways in the deposition chamber and plasma chamber of single coil divergent field MWECR CVD system,are investigated.The magnetic field gradient of these magnetic field profiles is obtained quantitatively by using Lorentz fit.The results indicate that the gradient value of the magnetic field profile near by the substrate,which is produced by a coil current with 137.7A if a SmCo permanent magnet is equipped under the substrate holder,is the largest;when the SmCo permanent magnet is taken away,the larger one is produced by the coil current with 137.7A and the smallest one produced by a coil current with 115.2A.High deposition rate of a-Si∶H film is observed near by the substrate with high magnetic field gradient.But uneven deposition rate along the radius of the sample holder is also found by infrared analysis technology when sample is deposited in magnetic field profile,which is produced by the coil current with 137.7A if the SmCo permanent magnet is equipped under the substrate holder. 展开更多
关键词 magnetic field gradient Lorentz fit a-Si∶h film deposition rate MWECR CVD deposition system
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大底坡下“H”型竖缝式鱼道池室水力特性数值研究
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作者 邓斌 徐拓 +3 位作者 黄姣凤 瞿超雄 张家强 蒋昌波 《水资源与水工程学报》 CSCD 北大核心 2023年第6期98-107,共10页
竖缝式鱼道作为一种生态补偿工程可有效缓解水利工程对鱼类洄游造成的不利影响,研究合理参数下竖缝式鱼道水力特性对建设经济有效型鱼道具有重要意义。基于物理模型试验与三维数值模拟相结合的方法,在大底坡1∶20情况下,系统分析了9种... 竖缝式鱼道作为一种生态补偿工程可有效缓解水利工程对鱼类洄游造成的不利影响,研究合理参数下竖缝式鱼道水力特性对建设经济有效型鱼道具有重要意义。基于物理模型试验与三维数值模拟相结合的方法,在大底坡1∶20情况下,系统分析了9种池室长宽比的“H”型竖缝式鱼道流场分布及水力特性。结果表明:不同池室长宽比下主流均呈“S”型,主流流速最大衰减率为46.4%~61.3%;池室长宽比L∶B=10∶8为大底坡“H”型竖缝式鱼道最佳池室长宽比,该方案池室内水流流态较好,主流向右侧弯曲且曲率最大,存在较大范围的低紊流区,且满足鱼道单位体积消能率的要求,有利于鱼类洄游上溯。研究结果可为大底坡下“H”型竖缝式鱼道参数选取与水力优化设计提供参考依据。 展开更多
关键词 h”型竖缝式鱼道 大底坡 水力特性 流场结构 物理模型 数值模拟
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High Accuracy Calculation for Excited-State Energies of H Atoms in a Magnetic Field 被引量:3
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作者 ZHAO Li-Bo DU Meng-Li 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第8期339-345,共7页
Using the recently developed finite-basis-set method with B splines, excited states of H atoms in a magnetic field have been calculated. Energy levels are presented for the ten excited states, 2so, 3d'0, 3po, 3p-1, 3... Using the recently developed finite-basis-set method with B splines, excited states of H atoms in a magnetic field have been calculated. Energy levels are presented for the ten excited states, 2so, 3d'0, 3po, 3p-1, 3d_1, 4d-1, 3d-2, 4d-2, 4f-2 , and 5f-2 as a function of magnetic field strengths with a range from zero up to 2.35 × 10^6 T. The obtained results are compared with available high accuracy theoretical data reported in the literature and found to be in excellent agreement. The comparison also shows that the current method can produce energy levels with an accuracy higher than the existing high accuracy method [Phys. Rev. A 54 (1996) 287]. Here high accuracy energy levels are for the first time reported for the 3d'0, 4d-1, 4d-2, 4f-2, and 5f-2 states. 展开更多
关键词 h atoms strong magnetic fields white dwarf stars
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H型预应力混凝土护岸桩现场试验研究 被引量:2
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作者 戎伟 吴跃东 +1 位作者 刘坚 林颖 《河北工程大学学报(自然科学版)》 CAS 2023年第1期15-20,共6页
为研究H型预应力混凝土护岸桩在内河航道中的适用性,结合湖嘉申线二期航道改建工程,开展了现场试验,对桩土界面处土压力以及桩体内部应力应变进行监测。监测结果表明:背水侧土体的位移受到老护岸和上部荷载的约束,土体被挤得更密实,水... 为研究H型预应力混凝土护岸桩在内河航道中的适用性,结合湖嘉申线二期航道改建工程,开展了现场试验,对桩土界面处土压力以及桩体内部应力应变进行监测。监测结果表明:背水侧土体的位移受到老护岸和上部荷载的约束,土体被挤得更密实,水平土压力较大;而临水侧是河流且接近河流中轴线,水平土压力较小,最终水平土压力系数在1.1~1.2左右;桩体内部应力大于该型号H型护岸桩的混凝土有效预压应力,沉桩后各测点压应变减小。基于试验结果,对H型护岸桩土压力的计算方法进行了优化,使其更接近于实测值。 展开更多
关键词 h型桩 水平土压力 桩身应变 现场试验 土压力计算
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Quantum Path Selection and Isolated-Attosecond-Pulse Generation of H2+ with an Intense Laser Pulse and a Static Field 被引量:1
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作者 苗向阳 刘莎莎 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第1期42-46,共5页
We theoretically investigate the high-order-harmonic generation from the H2^+ molecular ion exposed to the combi- nation of an intense trapezoidal laser and a static field. The results show that the harmonic spectrum... We theoretically investigate the high-order-harmonic generation from the H2^+ molecular ion exposed to the combi- nation of an intense trapezoidal laser and a static field. The results show that the harmonic spectrum is obviously extended and the short quantum path is selected to contribute to the spectrum, because the corresponding long path is seriously suppressed. Then the combined Coulomb and laser field potentials and the time-dependent electron wave packet distributions are applied to illustrate the physical mechanism of high-order harmonic gen- eration. Finally, by adjusting the intensity of the static field and superposing a properly selected range of the HHG spectrum, a 90-as isolated attosecond pulse is straightforwardly obtained. 展开更多
关键词 Quantum Path Selection and Isolated-Attosecond-Pulse Generation of h2 with an Intense Laser Pulse and a Static field
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Model and analysis of drain induced barrier lowering effect for 4H-SiC metal semiconductor field effect transistor
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作者 曹全君 张义门 贾立新 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第10期4456-4459,共4页
Based on an analytical solution of the two-dimensional Poisson equation in the subthreshold region, this paper investigates the behavior of DIBL (drain induced barrier lowering) effect for short channel 4H-SiC metal... Based on an analytical solution of the two-dimensional Poisson equation in the subthreshold region, this paper investigates the behavior of DIBL (drain induced barrier lowering) effect for short channel 4H-SiC metal semiconductor field effect transistors (MESFETs). An accurate analytical model of threshold voltage shift for the asymmetric short channel 4H-SiC MESFET is presented and thus verified. According to the presented model, it analyses the threshold voltage for short channel device on the L/a (channel length/channel depth) ratio, drain applied voltage VDS and channel doping concentration ND, thus providing a good basis for the design and modelling of short channel 4H-SiC MESFETs device. 展开更多
关键词 4h silicon carbide metal semiconductor field effect transistor drain induced barrierlowering effect short channel
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Charge Resonance Enhanced Multiple Ionization of H2O Molecules in Intense Laser Fields
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作者 刘鸿 黎敏 +5 位作者 解西国 吴聪 邓勇开 吴成印 龚旗煌 刘运全 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第6期43-47,共5页
We perform a kinetically complete measurement on the fragmentation of Coulomb explosion of 1-120 molecules in intense few-cycle linearly and circularly polarized laser fields. Both the fragmentations of 1t203+ and H... We perform a kinetically complete measurement on the fragmentation of Coulomb explosion of 1-120 molecules in intense few-cycle linearly and circularly polarized laser fields. Both the fragmentations of 1t203+ and H204+ reveal the concerted pathway of dissociation. The length of the OH bond prior to the Coulomb explosion of both molecular ions is sensitive to the laser pulse duration and laser intensity. However, the bending angle of H-O-H is less sensitive to the pulse duration and laser intensity. We introduce the mechanism of charge resonance enhanced double ionization to elucidate the triple (or quadruple) dissociative ionization dynamics of H20, in which two electrons are non-adiabatically localized at the protons of the precursor ion H2O^+ (or H2O^2+) and are released simultaneously due to the over barrier ionization in the combined laser field and molecular ionic potential. Such charge resonance enhanced multiple ionization is not suppressed in few-cycle laser fields and elliptically polarized laser fields. 展开更多
关键词 In LENGTh Charge Resonance Enhanced Multiple Ionization of h2O Molecules in Intense Laser fields
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Electronic Detection of Escherichia coli O157︰H7 Using Single-Walled Carbon Nanotubes Field-Effect Transistor Biosensor
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作者 Xiaoxian Zhang Dongwei Wang +2 位作者 Danna Yang Sai Li Zhiqiang Shen 《Engineering(科研)》 2012年第10期94-98,共5页
Field effect transistors (FET) based on Single-Walled Carbon Nanotubes (SWNTs) become the hot topic in fields of nano-electronic, clinical diagnostics, environmental testing etc. in recent years. In this paper, we rep... Field effect transistors (FET) based on Single-Walled Carbon Nanotubes (SWNTs) become the hot topic in fields of nano-electronic, clinical diagnostics, environmental testing etc. in recent years. In this paper, we reported a simple, scalable way to enrich semiconducting SWNTs by using HNO3/H2SO4. Then carbon nanotube field-effect transistors (CNTFET) biosensor was fabricated with the enrichment SWNTs for Escherichia coli O157︰H7 detection. The response of each CNTFET was monitored in real time before and after introduction of the Escherichia coli O157︰H7 at various concentrations. The results show that CNT-FET biosensors we fabricated are sensitive to change of concentration of solution and response time is really short. 展开更多
关键词 SINGLE-WALLED Carbon Nanotubes (SWNTs) field Effect Transistors BIOSENSOR ESChERIChIA Coli O157︰h7
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H型护岸桩沉桩产生的超孔压及水平位移计算
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作者 刘世旭 吴跃东 刘坚 《河北工程大学学报(自然科学版)》 CAS 2023年第2期36-43,共8页
H型桩由于特殊的截面形式,打桩过程引起的挤土效应特征不能简单地采用管桩的挤土规律代替。因此基于湖嘉申二期工程现场试验数据,研究其沉桩引起的超孔隙水压力和土体位移规律,通过修正的圆孔扩张模型考虑H型桩在扩孔时的特殊性,推导出... H型桩由于特殊的截面形式,打桩过程引起的挤土效应特征不能简单地采用管桩的挤土规律代替。因此基于湖嘉申二期工程现场试验数据,研究其沉桩引起的超孔隙水压力和土体位移规律,通过修正的圆孔扩张模型考虑H型桩在扩孔时的特殊性,推导出适合H型桩的矩形孔扩张的计算公式。用该公式对沉桩产生的超孔压及土体位移进行计算,并与其他方法进行对比。结果表明,修正后的扩孔模型在计算H型桩的超孔压和土体位移方面充分考虑到孔隙水压力沿深度线性变化的特点,结果更加接近实测数据。 展开更多
关键词 h型桩 挤土效应 现场试验 孔隙水压力 土体位移 修正扩孔模型
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Compressed H3S: Fits to the Empirical Hc2(T) Data and a Discussion of the Meissner Effect
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作者 Gulshan Prakash Malik Vijaya Shankar Varma 《World Journal of Condensed Matter Physics》 2023年第4期111-127,共17页
Based on μ-, T- and H-dependent pairing and number equations and the premise that μ(T) is predominantly the cause of the variation of the upper critical field H<sub>c</sub><sub>2</sub>(T), wh... Based on μ-, T- and H-dependent pairing and number equations and the premise that μ(T) is predominantly the cause of the variation of the upper critical field H<sub>c</sub><sub>2</sub>(T), where μ, T and H denote the chemical potential, temperature and the applied field, respectively, we provide in this paper fits to the empirical H<sub>c</sub><sub>2</sub>(T) data of H<sub>3</sub>S reported by Mozaffari, et al. (2019) and deal with the issue of whether or not H<sub>3</sub>S exhibits the Meissner effect. Employing a variant of the template given by Dogan and Cohen (2021), we examine in detail the results of Hirsch and Marsiglio (2022) who have claimed that H<sub>3</sub>S does not exhibit the Meissner effect and Minkov, et al. (2023) who have claimed that it does. We are thus led to suggest that monitoring the chemical potential (equivalently, the number density of Cooper pairs N<sub>s</sub> at T = T<sub>c</sub>) should shed new light on the issue being addressed. 展开更多
关键词 Compressed h3S Upper and Lower Critical fields Chemical Potential Generalized Pairing and Number Equations Coherence Length Penetration Depth Meissner Effect
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H_2的外场效应 被引量:47
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作者 朱正和 付依备 +2 位作者 高涛 陈银亮 陈晓军 《原子与分子物理学报》 CAS CSCD 北大核心 2003年第2期169-172,共4页
本文计算H2 从基态到激发态的跃迁矩阵元 ( μ) 0n,振子强度f0n,自发辐射系数An0 和吸收系数B0n(n=1- 6 ) ,还计算了在电场 →E =- 72 .0 ,- 36 .0 ,0 .0 ,36 .0和 72 .0V/M下H2 的行为。对进一步研究高分子材料的外场效应有参考价值。
关键词 h2 氢气分子 外场效应 跃迁矩阵元 振子强度 计算 自发辐射系数 吸收系数 高分子材料 结构
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H型钢冷却过程温度场有限元分析 被引量:17
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作者 刘洪伟 阎军 +1 位作者 陈大宏 钱健清 《安徽工业大学学报(自然科学版)》 CAS 2003年第1期4-7,共4页
借助MARC/Mentat有限元分析软件,对H型钢冷却过程进行了有限元模拟,研究了冷却过程中的热边界条件,分析了轧件温度场的分布及其变化规律,数值模拟结果与实测结果吻合较好。分析结果对于掌握H型钢的冷却规律、分析残余应力、以及开发控... 借助MARC/Mentat有限元分析软件,对H型钢冷却过程进行了有限元模拟,研究了冷却过程中的热边界条件,分析了轧件温度场的分布及其变化规律,数值模拟结果与实测结果吻合较好。分析结果对于掌握H型钢的冷却规律、分析残余应力、以及开发控制冷却技术具有实际指导意义。 展开更多
关键词 h型钢 冷却过程 温度场 有限元分析 温度分布 冷却规律 残余应力
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一种强度不对称的两态叠加多模叠加态光场的等阶N次方H压缩特性研究 被引量:25
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作者 韩小卫 杨志勇 +3 位作者 薛红 王菊霞 孙秀泉 侯洵 《量子光学学报》 CSCD 2001年第3期113-117,共5页
利用多模压缩态理论 ,研究了一种强度不对称的两态叠加多模叠加态光场 |Ψ(ab)I >q 的等阶N次方H压缩特性。结果发现 :当腔模总数 q与压缩阶数 N 这两者之积 qN 为偶数时 ,态 |Ψ(ab)I >q 的第一或第二正交分量在一定条件下可... 利用多模压缩态理论 ,研究了一种强度不对称的两态叠加多模叠加态光场 |Ψ(ab)I >q 的等阶N次方H压缩特性。结果发现 :当腔模总数 q与压缩阶数 N 这两者之积 qN 为偶数时 ,态 |Ψ(ab)I >q 的第一或第二正交分量在一定条件下可分别呈现出等阶N次方H压缩效应。 展开更多
关键词 多模叠加态光场 N次方h压缩 最小测不准态 压缩简并 多模压缩态 两态叠加 量子光学
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