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New Compacton Solutions and Solitary Pattern Solutions for Modified Nonlinearly Dispersive mK(m,n,a,b) Equation

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Communications in Theoretical Physics 2009年第10期52卷 637-640页

作者： YU ya-Xuan Department of Applied Mathematics Ningbo University Ningbo 315211 China

In this paper exact solutions of a new modified nonlinearly dispersive equation （simply called inK（m, n, a, b） Ua Ub equation）, u^m-1 ut ＋ α（ u^n）x ＋β（u^a（u^b）xx）x = 0, is investigated by using some direct algorithms. As a result, abundant new compacton solutions （solitons with the absence of infinite wings） and solitary pattern solutions （having infinite slopes or cusps） are obtained.

关键词： mK(m n a b) equation compacton solution solitary pattern solution

Identification of nonlinear process described by neural fuzzy Hammerstein-Wiener model using multi-signal processing

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Advances in Manufacturing 2023年第4期11卷 694-707页

作者： Feng Li Li Jia ya gu College of Electrical and Information Engineering Jiangsu University of TechnologyChangzhou213001JiangsuPeople’s Republic of China School of Mechatronics Engineering and Automation Shanghai UniversityShanghai200444People’s Republic of China School of Electrical Engineering and Automation Changshu Institute of TechnologyChangshu215500JiangsuPeople’s Republic of China

In this study,a novel approach for nonlinear process identification via neural fuzzy-based Hammerstein-Wiener model with process disturbance by means of multi-signal processing is *** Hammerstein-Wiener model consists of three blocks where a dynamic linear block is sandwiched between two static nonlinear ***-signal sources are designed for achieving identification separation of the Hammerstein-Wiener *** correlation analysis theory is utilized for estimating unknown parameters of output nonlinearity and linear block using separable signals,thus the interference of process disturbance is ***,the immeasurable intermediate variable and immeasurable noise term in identification model is taken over by auxiliary model output and estimate residuals,and then auxiliary model-based recursive extended least squares parameter estimation algorithm is derived to calculate parameters of the input nonlinearity and noise ***,convergence analysis of the suggested identification scheme is derived using stochastic process *** simulation results indicate that proposed identification approach yields high identification accuracy and has good robustness.

关键词： Nonlinear process Parameter identification Hammerstein-Wiener model Neural fuzzy model Multiple signal processing

Supersymmetric Sawada-Kotera-Ramani Equation: Bilinear Approach

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Communications in Theoretical Physics 2008年第3期49卷 685-688页

作者： YU ya-Xuan Department of Mathematics Ningbo University Ningbo 315211 China

In this paper, using the Hirota＇s bilineax method, we consider the N = 1 supersymmetric Sawada-Kotera- Ramani equation and obtain the Bazcklund transformation of it. Its one- and two-supersoliton solutions axe obtain... 详细信息

关键词： N = 1 supersymmetric Sawada-Kotera-Ramani equation Backlund transformation supersoliton solutions

Meigs syndrome with pleural effusion as initial manifestation:A case report

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World Journal of Clinical Cases 2021年第21期9卷 5972-5979页

作者： ya-ya Hou Li Peng Mei Zhou Department of Obstetrics and gynaecology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430000Hubei ProvinceChina Department of Pathology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430000Hubei ProvinceChina Department of Respiratory Medicine Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022Hubei ProvinceChina

BACKgROUND Meigs syndrome is a rare neoplastic disease characterized by the triad of benign solid ovarian tumor,ascites,and pleural *** postmenopausal women with pleural effusions,ascites,elevated CA-125 level,and pelvic masses,the probability of disseminated disease is ***,the final diagnosis is based on its histopathologic features following surgical removal of a mass *** we describe a case of Meigs syndrome with pleural effusion as the initial *** SUMMARY A 52-year-old woman presented with a 2-mo history of dry cough and oppression in the chest and was admitted to our hospital due to recurrent pleural effusion and gradual worsening of dyspnea that had occurred over the previous *** months before admission,the patient underwent repeated chest drainage and empirical anti-tuberculosis ***,the pleural fluid accumulation persisted,and the patient began to experience dyspnea on exertion leading to admission.A computed tomography scan of the chest,abdominal ultrasound,and magnetic resonance imaging confirmed the presence of right-sided pleural effusion and ascites with a right ovarian *** tumor markers showed raised *** a suspicion of a malignant tumor,the patient underwent laparoscopic excision of the ovarian mass and the final pathology was consistent with an ovarian *** the seventh day postoperation,the patient had resolution of the right-sided pleural *** Despite the relatively high risk of malignancy when an ovarian mass associated with hydrothorax is found in a patient with elevated serum levels of CA-125,clinicians should be aware about rare benign syndromes,like Meigs,for which surgery remains the preferred treatment.

关键词： Meigs syndrome Pleural effusion CA-125 Ovarian thecoma Case report

Effect of wide-spectrum pulsed magnetic field on grain refinement of pure aluminium

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China Foundry 2023年第1期20卷 40-48页

作者： ya-ming Bai gang Li ya-wei Sun Yong-yong gong Qi-jie Zhai College of Science Shanghai University99 Shangda RoadShanghai 200444China Center for Advanced Solidification Shanghai University99 Shangda RoadShanghai 200444China School of Materials Science and Engineering Shanghai University99 Shangda RoadShanghai 200444China

A wide-spectrum pulsed magnetic field(WSPMF)was obtained by adjusting the number of current pulses and the pulse interval between adjacent *** effect of WSPMF on the grain refinement of pure aluminium was *** distribution of electromagnetic force and flow field in the melt under the WSPMF was simulated to reveal the grain refining *** show that the grain refinement is attributed to the combined effect of the melt flow and oscillation under a *** the pulse interval is 5 ms,the extreme value of electromagnetic force is the highest,and the size of the crystal nucleus is 0.35 *** the case of similar flow rates,the grain size gradually decreases as the pulse interval *** range of the harmonic frequency of the magnetic field gradually expands with the increase of the pulse interval,which can provide more energy for nucleation at the solid-liquid interface and promote nucleation.

关键词： wide-spectrum pulsed magnetic field forced flow grain refinement frequency components

Non-dimensional analysis on blast wave propagation in foam concrete:Minimum thickness to avoid stress enhancement

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Defence Technology（防务技术） 2024年第6期36卷 30-46页

作者： ya yang Xiangzhen Kong Qin Fang State Key Laboratory of Disaster Prevention&Mitigation of Explosion&Impact Army Engineering University of PLANanjing 210007JiangsuChina

Foam concrete is a prospective material in defense engineering to protect structures due to its high energy absorption capability resulted from the long plateau ***,stress enhancement rather than stress mitigation may happen when foam concrete is used as sacrificial claddings placed in the path of an incoming blast *** investigate this interesting phenomenon,a one-dimensional difference model for blast wave propagation in foam concrete is firstly proposed and numerically solved by improving the second-order godunov *** difference model and numerical algorithm are validated against experimental results including both the stress mitigation and the stress *** difference model is then used to numerically analyze the blast wave propagation and deformation of material in which the effects of blast loads,stress-strain relation and length of foam concrete are *** particular,the concept of minimum thickness of foam concrete to avoid stress enhancement is ***,non-dimensional analysis on the minimum thickness is conducted and an empirical formula is proposed by curve-fitting the numerical data,which can provide a reference for the application of foam concrete in defense engineering.

关键词： Foam concrete Blast wave propagation Non-dimensional analysis Stress enhancement

New Jacobian Elliptic Function Solutions of Modified KdV Equation: Ⅱ

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Communications in Theoretical Physics 2002年第10期38卷 400-402页

作者： yaN Zhen-ya Department of Mathematics University of British Columbia Vancouver BC Canada V6T 1Z2

Recently, we obtained thirteen families of Jacobian elliptic function solutions of mKdV equation by usingour extended Jacobian elliptic function expansion method. In this note, the mKdV equation is investigated and anotherthree families of new doubly periodic solutions (Jacobian elliptic function solutions) are fbund again by using a newtransformation, which and our extended Jacobian elliptic function expansion method form a new method still called theextended Jacobian elliptic function expansion method. The new method can be more powertul to be applied to othernonlinear differential equations.

关键词： modified KdV equation, Jacobian elliptic function, doubly periodic solution

Ultrafast lasers—reliable tools for advanced materials processing

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Light(Science & Applications) 2014年第1期3卷 256-267页

作者： Koji Sugioka ya Cheng RIKEN Center for Advanced Photonics SaitamaJapan State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina

The unique characteristics of ultrafast lasers,such as picosecond and femtosecond lasers,have opened up new avenues in materials processing that employ ultrashort pulse widths and extremely high peak ***,ultrafast lasers are currently used widely for both fundamental research and practical *** review describes the characteristics of ultrafast laser processing and the recent advancements and applications of both surface and volume *** processing includes micromachining,microand nanostructuring,and nanoablation,while volume processing includes two-photon polymerization and three-dimensional(3D)processing within transparent *** and industrial applications of ultrafast laser processing are also introduced,and a summary of the technology with future outlooks are also given.

关键词： 3D fabrication industrial application micromachining nanofabrication ultrafast laser

High-temperature wetting behavior between slag and refractory

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Journal of Iron and Steel Research International 2024年第6期31卷 1304-1319页

作者： Yong-xin Wang ya-ge Li ya-bo gao Zhong Huang Hai-jun Zhang The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina

Slag corrosion is one of the main factors of the damage of refractory,and its primary manifestations involve the melting of refractory in slag and the slag penetration into refractory,both of which are highly related to the wetting behavior between slag and *** high-temperature wettability could be characterized by parameters including the surface tension,adhesion work,and spreading coefficient of the slag on refractory surface,and it could be suppressed by altering the slag/refractory interface,thus resulting in an improved anti-corrosion *** this,the key knowledges of the slag corrosion,theory of wetting behavior and test of high-temperature contact angle were firstly ***,the major factors influencing the high-temperature slag wetting behavior were discussed based on the aspects of slag composition,refractory composition,and surface ***,the future research direction was proposed in this field.

关键词： High-temperature wetting Refractory Slag corrosion Surface tension