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A more general form of lump solution,lumpoff,and instanton/rogue wave solutions of a reduced (3+1)-dimensional nonlinear evolution equation

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Chinese Physics B 2018年第12期27卷 147-156页

作者： Panfeng zheng Man jia Physics Department Ningbo UniversityNingbo 315211China Ningbo Collaborative Innovation Center of Nonlinear Hazard System of Ocean and Atmosphere Ningbo UniveisityNingbo 315211China

In this manuscript,a reduced(3+1)-dimensional nonlinear evolution equation is *** first construct the bilinear formalism of the equation by using the binary Bell polynomials theory,then explore a lump solution to the special case for z=***,a more general form of lump solution of the equation is found which possesses seven arbitrary parameters and four constraint *** cutting the lump by the induced soliton(s),lumpoff and instanton/rogue wave solutions are also constructed by the more general form of lump solution.

关键词： a reduced(3 + 1)-dimensional nonlinear evolution equation more general form of lump solution soliton induced by lump lumpoff and instanton/rogue wave solutions

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囊体扩张主动控制桩基水平变形机理分析

岩土工程学报 2025年第1期47卷 85-95页

作者：黄建友闫宇涛刁钰郑刚李凯贾建伟刘永超天津大学建筑工程学院天津300072 滨海土木工程结构与安全教育部重点实验室(天津大学) 天津300072 中国建筑第五工程局有限公司湖南长沙410004 中国建筑第六工程局有限公司天津300457 天津建城基业集团有限公司天津300301

囊体扩张是一种新型地下结构变形主动控制技术,然而其在桩基变形控制机理方面尚未深入研究。采用有限元软件探究了囊体扩张控制桩基水平变形机理,分析了囊体扩张引起桩基和土体变形特性以及囊体-土体-桩体之间相互作用。结果表明:扩张直... 详细信息

囊体扩张是一种新型地下结构变形主动控制技术,然而其在桩基变形控制机理方面尚未深入研究。采用有限元软件探究了囊体扩张控制桩基水平变形机理,分析了囊体扩张引起桩基和土体变形特性以及囊体-土体-桩体之间相互作用。结果表明:扩张直径0.5 m的囊体对直径为1.2 m的桩可产生最大5.5 mm水平变形,控制效率为60%,囊体扩张对桩基水平变形控制效果良好。囊体扩张会引起邻近土体产生较大的超孔隙水压力,而孔压消散会导致土体压缩而降低桩基控制效率。当扩张距离较小时,桩径对囊体扩张控制效果影响显著。囊体扩张对桩径为0.4~1.6m的桩均有一定的变形控制效果,尤其适用于小直径桩基的变形控制。随扩张直径的增大,桩基最大水平位移近乎呈线性增大。此外,桩基水平变形随扩张距离增大而减小,但由于扩张对周围孔隙水压力影响范围有限,导致控制效率呈增大趋势。双排囊体扩张控制变形中“遮拦效应”和“反力效应”明显,控制桩基变形应遵循“先远后近,逐排扩张”的原则,以提高控制效果。

关键词：囊体扩张桩基变形控制机理分析

Multi-mode optimal fuzzy active vibration control of composite beams laminated with photostrictive actuators

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Chinese Journal of Aeronautics 2019年第6期32卷 1442-1450页

作者： Mancang jia Shijie zheng Rongbo HE Institute of Smart Materials and Structures State Key Laboratory of Mechanics and Control of Mechanical StructuresNanjing University of Aeronautics and AstronauticsNanjing 210016China School of Electrical Information Anhui University of TechnologyMaanshan 243002China

Firstly, a multi-field coupling finite element formulation of composited beam laminated with the photostrictive actuators is developed in this paper. Moreover, an optimal fuzzy active control algorithm is also proposed on the basis of the combination of optimal control and fuzzy *** method opens a new avenue to resolve the contradiction between the linear system control method and nonlinear actuating characteristics of photostrictive actuators. The desired control for suppressing multi-modal vibration of photoelectric laminated beam is firstly obtained through optimal control and then the fuzzy control is used to approach the desired mechanical strain induced by photostrictive actuators. Thus, the multi-mode vibration control of beam is *** the design process of optimal fuzzy controller, the design of fuzzy control is independent of optimal control. The simulation results demonstrate that the proposed control method can effectively realize multi-modal vibration control of photoelectric laminated beams, and the control effect of optimal fuzzy control is better than that of optimal state feedback control.

关键词： Active control Finite element method Multiple modes Optimal fuzzy control algorithm Photostrictive actuators

Hyocholic acid and glycemic regulation:comments on‘Hyocholic acid species improve glucose homeostasis through a distinct TGR5 and FXR signaling mechanism’

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Journal of Molecular Cell Biology 2021年第6期13卷 460-462页

作者： Wei jia Cynthia Rajani Xiaojiao zheng Weiping jia Center for Translational Medicine Shanghai Key Laboratory of Diabetes MellitusDepartment of Endocrinology and MetabolismShanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai Diabetes InstituteShanghai 200233China School of Chinese Medicine Hong Kong Baptist UniversityKowloon TongHong Kong SARChina University of Hawaii Cancer Center HonoluluHI 96813USA

Hyocholic acid species(HCA,hyodeoxycholic acid,and their glycine and taurine conjugated forms)comprise 80%of the composition of pig bile(Haslewood,1956).An interesting fact about pigs is that they do not get diabetes even though they eat almost everything and in abundant amounts,a diabetes-promoting *** first use of pig bile for treatment of‘xiao-ke’.

关键词： homeostasis bile abundant

The interpretation of the CMBR

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Research in Astronomy and Astrophysics 2021年第9期21卷 180-184页

作者： Yi-jia zheng National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

In the popular ACDM model,the cosmic microwave background radiation(CMBR)is thought to be the remnant of the early hot *** important precondition of this interpretation of CMBR is:after the last scattering surface formed,the high temperature ionized gases in the universe became low temperature neutral gases and so the universe has been completely transparent to the radiation which comes from the hot early ***,observations show that today most gases in the universe are still in a high temperature ionized *** universe is not completely transparent to the radiation which comes from the hot early *** to the famous Sunyaev-Zeldovich effect,if the CMBR comes from the early hot universe and follows a perfect blackbody spectrum,the free electrons in the cosmic plasma will distort the perfect blackbody spectrum of the *** this case,the observed CMBR cannot be of a perfect blackbody *** is a fatal flaw in the interpretation of CMBR using the ACDM *** order to overcome this fatal flaw,in this paper it is proposed that in the ACDM model frame,a better interpretation of CMBR is:The CMBR is a thermal equilibrium product between the high temperature ionized gases and the cosmic radiation field in the local universe space.

关键词： cosmology:theory cosmological model cosmic microwave background radiation

Topological superconductivity in a Bi2Te3/NbSe2 heterostructure:A review

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Chinese Physics B 2019年第6期28卷 5-15页

作者： Hao zheng Jin-Feng jia School of Physics and Astronomy Shanghai Jiao Tong University

Topological superconductors carry globally protected gapless boundary excitations, which are robust under local perturbations, and thus exhibit both fundamental and applicational importance. An unconventional pairing with p-wave symmetry, such as a nontrivial topology in the superconductor’s wavefunction, is required to generate a non-zero Berry phase. Until now, the Bi2 Te3/2 H–NbSe2 heterostructure has proven to be a practical way to realize a topological superconductor in real materials. This complex system, where odd numbers of spin-momentum locked Dirac cone surface states on the topological insulator Bi2 Te3 become superconducting, induced by the proximate effect from the underlying s-wave superconductor 2 H–NbSe2, realizes an effective two-dimensional(2 D) spinless px + i py topological superconductor. In this review article, we summarize the recent experimental progress of the successful synthesis of Bi2 Te3/2 H–NbSe2 heterostructures using molecular beam epitaxy, determining the thickness limit of the heterostructure, detecting the long thought Majorana quasiparticle inside a magnetic vortex core state by means of scanning tunneling microscopy and demonstration of the unique spatial and spin properties of a Majorana zero mode.

关键词： topological insulator topological superconductor Majorana zero mode scanning tunneling microscopy molecular beam epitaxy

Calculation of radiative heat flux on irregular boundaries in participating media

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Chinese Physics B 2020年第12期29卷 322-328页

作者： Yu-jia Sun Shu zheng School of Atmospheric Physics Nanjing University of Information Science and TechnologyNanjing 210044China National Engineering Laboratory for Biomass Power Generation Equipment North China Electric Power UniversityBeijing 102206China

Radiative heat flux at wall boundaries is important for its thermal *** methods based on structured grids are becoming trendy due to their simplicity and *** radiative transfer equation solvers produce oscillating radiative heat flux at the irregular boundary if they are based on structured *** Monte Carlo method and analytical discrete ordinates method are adopted to calculate the radiative heat flux at complex *** results show that the reverse Monte Carlo method can generate a smooth radiative heat flux profile and it is smoother with larger energy *** results from the analytical discrete ordinates method show that the fluctuations are due to the ray *** the total or the mean radiative heat flux,the results from the analytical discrete ordinates method are very close to those from the reverse Monte Carlo method.

关键词： radiative heat flux reverse Monte Carlo irregular boundary

Large Time Behavior of Solutions to a 3D Keller-Segel-Stokes System Involving a Tensor-valued Sensitivity with Saturation

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Acta Mathematicae Applicatae Sinica 2023年第4期39卷 1032-1064页

作者： Yuan-yuan KE jia-Shan zheng School of Mathematics Renmin University of ChinaBeijing 100872China School of Mathematics and Statistics Science Yantai UniversityYantai 264005China

In this paper we deal with the initial-boundary value problem for the coupled Keller-Segel-Stokes system with rotational flux, which is corresponding to the case that the chemical is produced instead of consumed,■subject to the boundary conditions( n-n S(x, n, c) c) · ν = c · ν = 0 and u = 0, and suitably regular initial data(n0(x), c0(x), u0(x)), where ? ? R3is a bounded domain with smooth boundary ??. Here S is a chemotactic sensitivity satisfying |S(x, n, c)| ≤ CS(1 + n)-αwith some CS> 0 and α > 0. The greatest contribution of this paper is to consider the large time behavior of solutions for the system(KSS), which is still open even in the 2D case. We can prove that the corresponding solution of the system(KSS) decays to(■) exponentially, if the coefficient of chemotactic sensitivity is appropriately small. As a precondition to consider the asymptotic behavior, we also show the global existence and boundedness of the corresponding initial-boundary problem KSS with a simplified method. We find a new phenomenon that the suitably small coefficient CSof chemotactic sensitivity could benefit the global existence and boundedness of solutions to the model KSS.

关键词： Large time behavior Global existence Boundedness Keller-Segel-Stokes system

Impacts of CO2 elevation on the physiology and seed quality of soybean

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Plant Diversity 2020年第1期42卷 44-51页

作者： Guowei zheng jia Chen Weiqi Li College of Chinese Material Medica Yunnan University of Chinese MedicineKunmingYunnanPeople's Republic of China Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnanPeople's Republic of China Yunnan Key Laboratory of Dai and Yi Medicines Yunnan University of Chinese MedicineKunmingYunnanPeople's Republic of China

Understanding the responses of crops to elevated atmospheric carbon dioxide concentrations(E[CO2])is very important in terms of global food *** present study investigates the effects of CO2 enrichment(to 800μmol mol^-1)on the physiology of soybean plants and the nutritional value of their seeds under growth chamber *** photosynthesis of soybean was significantly promoted by E[CO2]at all growth stages,but leaf area and specific leaf weight were not *** levels of mineral elements in the leaves decreased under *** soil properties after soybean cultivation under E[CO2]were not affected,except for a decrease in available ***,the levels of soluble sugars in the seeds were not affected by E[CO2].but the levels of natural antioxidants *** addition,the level of oleic acid decreased under E[CO2].However,levels of fatty acid peroxidation and saturation were *** conclusion.E[CO2] appears to have positive effects on the growth of cultivated soybean plants,but its influence on the nutritional values of soybean seeds is ***?2019 Kunming Institute of *** Academy of Sciences.

关键词： CO2 elevation Isoflavone Tocopherol Fatty acid Mineral element