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Seasonal and spatial variations of kinematic parameters of internal solitary waves in the Andaman Sea

Acta Oceanologica Sinica 2022年第4期41卷 14-22页

作者： Yuqi Wu Jieshuo Xie Jiexin Xu Zhiwu Chen Yinghui He Shuqun Cai State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of Sciences Beijing 100049China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Institution of South China Sea Ecology and Environmental Engineering Chinese Academy of SciencesGuangzhou 510301China Marine Development Planning and Research Center of Guangdong Province Guangzhou 510220China

The horizontally variable density stratification and background currents are taken into the variable-coefficent extended Korteweg-de Vries(evKdV)theory to obtain the geographical and seasonal distribution of kinematic parameters of internal solitary waves in the Andaman Sea(AS).The kinematic parameters include phase speed,dispersion parameter,quadratic and cubic nonlinear *** shows that the phase speed and dispersion parameter are mainly determined by the topographic feature and have limited seasonal *** maximum phase speed is 2.6 m/s,which occurs in the cool season(November)in the middle of the AS,while the phase speed in the cool season is slightly larger than those in other seasons,up to 11.4%larger than that in the rainy season(July)in the southern *** dispersion parameter in the cool season can be 22.3%larger than that in the hot *** nonlinear parameters have significant seasonal variation,and they can even change their signs at the continental slope in the north of the AS,from season to ***,the algebraic solitons dominate in the AS with minimum amplitudes(aal)ranging from 0.1 m to 102 m,and the maximum aal occurs in the cool season in the southern *** effect of the background flow on the parameters is also *** background flow has a great influence on the nonlinear parameters,e.g.,the value of cubic nonlinear parameter can be reduced by 1/3 when the background flow is not considered.

关键词： internal solitary waves kinematic parameters evKdV theory Andaman Sea

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The Response of Cockerel Semen kinematic parameters LIN, STR, WOB, ALH and BCF to Induced Oxidative Stress

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Open Journal of Animal Sciences 2021年第2期11卷 292-303页

作者： Cyril Mpho Pilane Mohleko Helen Mapeka Agricultural Research Council Animal Production Campus Germplasm Conservation & Reproductive Biotechnologies Irene South Africa Department of Animal Production and Agricultural Economics Faculty of Science and Agriculture University of Limpopo Sovenga South Africa

Computer-assisted sperm class analyser (CASA) analysis of avian semen following cryopreservation indicates that their semen motility and viability parameters become compromised, due in part to oxidative stress. To mimic these observations we have treated cockerel semen with an oxidative stress inducing agent, namely hydrogen peroxide (H2O2) and monitored the motility, kinematic and viability parameters over time. Briefly, five healthy and fertile South African Venda cockerels were selected and their semen was collected using the abdominal massage technique. The semen was then treated with H2O2 at 0 µM, 5 µM, 50 µM and 200 µM concentrations for 0, 3, 16 and 24 hrs. The semen motility, kinematic and viability parameters were then determined using the CASA system while the viability was determined using the SYBR-14/PI staining. The Pearson’s correlation coefficient was determined to test the relationships between the levels of induced oxidative stress, period of exposure to oxidative stress inducing agent and the motility plus kinematic parameters. Our data revealed that in raw cockerel semen, there was high and positive correlations between total motility (TM), progressive motility (PM), rapid (RAP), curvilinear velocity (VCL), straight line velocity (VSL) and average path velocity (VAP) while the kinematic parameters LIN, STR, WOB, ALH and BCF had low or negative correlations with them. Furthermore, TM, PM, RAP, VCL and VSL remained highly and positively correlated with the induced oxidative stress and also, linearity (LIN), straightness (STR), wobble (WOB), amplitude of lateral head displacement (ALH) and beat cross frequency (BCF) remained negatively correlated with the induced oxidative stress, after 3 hrs. After 24 hrs, TM, PM, RAP, VCL, VSL, VAP and ALH, became negatively correlated with the induced oxidative stress while LIN, STR, WOB and BCF became positively correlated with the induced oxidative

关键词： Cockerel Oxidative Stress kinematic parameters Semen

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Common reflection surface stack using dip decomposition for rugged surface topography

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Applied Geophysics 2007年第1期4卷 45-50页

作者： Sun Xiaodong Li Zhenchun Teng Houhua College of Geo-resources and Information China University of Petroleum Dongying 257061 China.

We present an extension of the Common Reflection Surface （CRS） stack that provides support for an arbitrary top surface topography. CRS stacking can be applied to the original prestack data without the need for any elevation statics. The CRS-stacked zero- offset section can be corrected （redatumed） to a given planar level by kinematic wave field attributes. The seismic processing results indicate that the CRS stacked section for rugged surface topography is better than the conventional stacked section for S/N ratio and better continuity of reflection events. Considering the multiple paths of zero-offset rays, the method deals with reflection information coming from different dips and performs the stack using the method of dip decomposition, which improves the kinematic and dynamic character of CRS stacked sections.

关键词： static correction CRS stack kinematic parameters redatuming dip decomposition.

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Successful application of optimized aperture based CRS stack in the Shengli exploration area

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Applied Geophysics 2009年第4期6卷 377-383,395页

作者：隋风贵隋淑玲李振春孙小东李芳李栋胜利油田地质科学研究院山东东营257015 中国石油大学地球资源与信息学院山东东营257061

The common reflection surface （CRS） stack is based on the local dip of the reflector and the reflection response within the first Fresnel zone. During the CRS stack all the information given by a multi-coverage reflection dataset can be successfully utilized. By now, it is known as the best zero-offset （ZO） imaging method. In this paper high quality CRS kinematic parameter sections are obtained by a modified CRS optimization strategy. Then stack apertures are calculated using the parameter sections which finally results in the realization of the CRS stack based on optimized aperture. Thus the advantages of CRS parameters are fully developed. Application to model and real seismic data reveals that, compared with the image section by a conventional CRS stack, the image section by CRS stack based on an optimized aperture improves both the signal-to-noise ratio and the continuity of reflection events.

关键词： Common reflection surface zero-offset section kinematic parameters optimized aperturea

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Research on the kinematic parameter calibration method of industrial robot based on LM and PF algorithm

Research on the kinematic parameter calibration method of in...

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第32届中国控制与决策会议

作者： Xin Deng Lianzheng Ge Ruifeng Li Zhiheng Liu Harbin Institute of Technology

The absolute positioning accuracy of the industrial robot is one of its important performance indexes,which is impacted by the key factor of robotic kinematic ***,based on the MDH model a calibration method of robot kinematic parameters,which combines the Levenberg-Marquardt algorithm with the particle filter algorithm is ***,the MDH model of an industrial robot is established,and the parameters in the tool coordinate transformation are also regarded as the parameters to be *** the end error model is ***,the initial optimization is carried out using the Levenberg-Marquardt（LM） ***,the particle filter algorithm is used to further optimize the parameters considering the measurement ***,compared with other methods,such as spatial circle fitting method,least square method and extended Kalman filter *** results show that the kinematic parameters of the robot are accurately calibrated and the absolute positioning accuracy of the industrial robot is significantly improved by this *** with other methods,the parameters calibrated by this method have stronger generalization ability.

关键词： kinematic parameters MDH model Levenberg-Marquardt algorithm Particle filter algorithm

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