SUBHARMONIC

作品数：41被引量：96H指数：4
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相关领域：理学更多>>
相关作者：赵明华陈永忠钟少鹏张骏强汪宝亮更多>>
相关机构：中国科学院上海应用物理研究所更多>>
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P-symmetric Subharmonic Solutions for Nonlinear Hamiltonian Systems
《Acta Mathematica Sinica,English Series》2024年第6期1388-1408,共21页Duan Zhi ZHANG Zhi Hao ZHAO 
partially supported by National Key R&D Program of China(Grant No.2020YFA0713300);NSFC Grants(Grant Nos.17190271 and 11171341);LPMC of Nankai University;partially supported by the NSFC Grants(Grant Nos.12171253 and 17190271);LPMC of Nankai University。
In this paper,we prove that for each positive k≡1 mod m there exists a P-symmetric kmτ-periodic solution xk for asymptotically linear mτ-periodic Hamiltonian systems,which are nonautonomous and endowed with a P-sym...
关键词：P-symmetric subharmonic Hamiltonian systems Maslov-type index theory iteration inequality asymptotically linear 
Application of subharmonic-aided pressure estimation in a patient with giant hepatic cyst:A case report
《Portal Hypertension & Cirrhosis》2024年第2期124-127,共4页Xiuyun Lu Jiaying Cao Yaozu Liu Jingqin Ma Jianjun Luo Yi Dong Wenping Wang 
Clinical Research Plan of SHDC,Grant/Award Numbers:SHDC2020CR4060,SHDC2020CR1031B;Shanghai Pujiang Program,Grant/Award Number:2020PJD008;National Natural Science Foundation of China,Grant/Award Number:82071942。
Giant hepatic cysts may lead to impaired liver function by compressing surrounding tissue,resulting in symptoms such as nausea or portal hypertension.Subharmonic-aided pressure estimation(SHAPE)offers a noninvasive me...
关键词：HEPATIC admitted IMPAIRED 
Subharmonic scattering of ultrasound contrast agent microbubbles may be an effective and promising tool for portal vein pressure estimation被引量：2
《Hepatobiliary Surgery and Nutrition》2023年第4期625-627,共3页Mingchang Pang Huayu Yang 
supported by the National Natural Science Foundation of China(No.32271470);National High Level Hospital Clinical Research Funding(No.2022-PUMCH-B-034);Beijing Natural Science Foundation(No.7212077);CAMS Innovation Fund for Medical Sciences(CIFMS)(No.2021-I2M-1-058).
Portal hypertension(PH)is a commonly observed syndrome in patients with cirrhosis and other chronic liver diseases(1).It is closely associated with severe clinical complications,including upper gastrointestinal hemorr...
关键词：Subharmonic scattering ultrasound contrast agent portal vein pressure(PVP) non-invasive estimation 
Stability of Three-Dimensional Interfacial Waves Under Subharmonic Disturbances
《China Ocean Engineering》2023年第4期558-567,共10页Nabil ALLALOU Mohammed DEBIANE Christian KHARIF 
This study examines the stability regimes of three-dimensional interfacial gravity waves.The numerical results of the linear stability analysis extend the three-dimensional surface waves results of Ioualalen and Khari...
关键词：short-crested interfacial waves linear stability collocation method Padéapproximant 
Subharmonic aided pressure estimation in portal hypertension:A noninvasive ultrasound-based technique to assess portal pressure gradient被引量：1
《Portal Hypertension & Cirrhosis》2023年第2期98-100,共3页Yun-Lin Huang Juan Cheng Xin-Liang Xu Sheng Chen Wen-Ping Wang Yi Dong 
Sino-German Mobility Programme of NSFC and DFG,Grant/Award Number:M-0504;National Natural Science Foundation of China,Grant/Award Numbers:82071942,82272013;Shanghai Pujiang Program,Grant/Award Number:2020PJD008;Clinical Research Plan of SHDC,Grant/Award Numbers:SHDC2020CR1031B,SHDC2020CR4060。
Portal hypertension(PH)is a clinical syndrome,characterized by elevated pressure gradient between portal vein and inferior vena cava.These elevated pressures gradient due to increased vascular resistance and/or increa...
关键词：hepatic venous pressure gradient liver cirrhosis portal hypertension subharmonic aided pressure estimation subharmonic imaging ultrasound contrast agent 
Subharmonic mode locking of a Q-switched Nd:YAG laser被引量：1
《Chinese Optics Letters》2023年第3期96-100,共5页Alexey Gribanov Mikhail Yakovin Dmitry Yakovin Mikhail Mosin 
supported by the Russian Foundation for Basic Research;the Government of the Novosibirsk Region(No.19-42-543002)。
A Q-switched Nd:YAG laser has been actively mode-locked at a subharmonic frequency for the first time,to the authors’knowledge.The laser operation mode is provided by a combination of a traveling wave acousto-optic m...
关键词：Nd:YAG laser diode pumping Q switching mode locking parametric light generators 
Periodic-phase-diagram similarity method for weak signal detection
《International Journal of Mechanical System Dynamics》2021年第2期248-255,共8页Ruilan Tian Yangkun Zhang Shaopu Yang Kai Yuan Qiang Xue Quanrong Ren 
This study was supported by the National Natural Science Foundation of China(Nos.12072203,11872253,12032017);the Hundred Excellent Innovative Talents in Hebei Province(No.SLRC2019037);the“333 talent project”in Hebei Province(No.A202005007);the Natural Science Foundation in Hebei Province of China(Nos.A2019421005,A2019402043,E2019210278);the Hebei Provincial Department of Education Project(Nos.ZD2020328,QN2019149,QN2018237);the Graduate Student Innovation Ability Training Project of Hebei Education Department(CXZZSS2021080).
The periodic-phase-diagram similarity method is proposed to identify the frequency of weak harmonic signals.The key technology is to find a set of optimal coefficients for Duffing system,which leads to the periodic mo...
关键词：periodic system signal-to-noise ratio stochastic subharmonic Melnikov method strong noise weak signal 
Subharmonic and Combination Resonance of Rotating Pre-deformed Blades Subjected to High Gas Pressure被引量：3
《Acta Mechanica Solida Sinica》2020年第5期635-649,共15页Bo Zhang Hu Ding Li-Qun Chen 
This project is supported by the National Natural Science Foundation of China(Grant Nos.11702033 and 11872159);the Fundamental Research Funds for the Central Universities,CHD(Grant Nos.300102120106,300102128107);the Innovation Program of Shanghai Municipal Education Commission(No.2017-01-07-00-09-E00019).
The present paper deals with the investigation of dynamic responses of a rotating pre-deformed blade in four cases of resonance,including two subharmonic resonances and two combination resonances.The dimensionless gas...
关键词：Internal resonance Subharmonic resonance Combination resonance Rotating blade Stability 
Internal Waves Generated by Tidal Flows over a Triangular Ridge with Critical Slopes被引量：1
《Journal of Ocean University of China》2019年第5期1005-1012,共8页NIE Yuhua CHEN Zhiwu XIE Jieshuo XU Jiexin HE Yinghui CAI Shuqun 
supported by the Key Research Program of Frontier Sciences, CAS (No. QYZDJ-SSWDQC034);the National Natural Science Foundation of China (Nos. 41430964, 41521005, 41776007, 41506005);the Pearl River S&T Nova Program of Guangzhou (No. 201610010012);the Youth Innovation Promotion Association CAS (No. 2018378);No. ISEE2018PY05 from CAS
Direct numerical simulations are performed to investigate the generation of internal waves by tide-topography interaction in a lab-scale model.The bottom topography is a triangular ridge with two critical slopes.With ...
关键词：INTERNAL WAVE beam parametric SUBHARMONIC instability INTERNAL WAVE ENERGETICS tide-topography interaction 
Infinite Subharmonic Solutions of the Forced Relativistic Oscillators
《Journal of Applied Mathematics and Physics》2019年第7期1498-1512,共15页Zaihong Wang Tiantian Ma 
In this paper, we study the multiplicity of subharmonic solutions of the nonlinear differential equation of the forced relativistic oscillators. By using the generalized Poincaré-Birkhoff fixed point theorem, we prov...
关键词：RELATIVISTIC Oscillator SUBHARMONIC Solution Poincaré-Birkhoff Fixed Point Theorem 
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