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Analytical solution for 1D consolidation of unsaturated soil with mixed boundary condition

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第1期14卷 61-70页

作者： zhen-dong SHAN Dao-sheng LING Hao-jiang DING MOE Key Lab of Soft Soils and Geo-environmental Engineering Zhejiang University Institute of Engineering Mechanics China Earthquake Administration

Based on consolidation equations proposed for unsaturated soil, an analytical solution for 1D consolidation of an unsaturated single-layer soil with nonhomogeneous mixed boundary condition is developed. The mixed boundary condition can be used for special applications, such as tests occur in laboratory. The analytical solution is obtained by assuming all material parameters remain constant during consolidation. In the derivation of the analytical solution, the nonhomogeneous boundary condition is first transformed into a homogeneous boundary condition. Then, the eigenfunction and eigenvalue are derived according to the consolidation equations and the new boundary condition. Finally, using the method of undetermined coefficients and the orthogonal relation of the eigenfunction, the analytical solution for the new boundary condition is obtained. The present method is applicable to various types of boundary conditions. Several numerical examples are provided to investigate the consolidation behavior of an unsaturated single-layer soil with mixed boundary condition.

关键词： Unsaturated soil Consolidation Mixed boundary condition Analytical solution

Semiconductor fibers for textile integrated electronic systems

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National Science Review 2024年第6期11卷 100-101页

作者： Yuanyuan zheng zhen Wang Peining Chen Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceInstitute of Fiber Materials and Devices and Laboratory of Advanced Materials Fudan University

Over 5000 years of development, the functions of clothing have been mainly limited in warmth and modesty. With the development of smart fibers, fabrics are anticipated to revolutionize multidisciplinary applications, ... 详细信息

关键词： Fibers

Electron acceleration by tightly focused radially polarized few-cycle laser pulses

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Chinese Physics B 2012年第2期21卷 278-285页

作者： Liu Jin-Lu sheng zheng-Ming zheng Jun Key Laboratory for Laser Plasmas(Ministry of Education)and Department of Physics Shanghai Jiao Tong UniversityShanghai 200240China

Within the framework of plane-wave angular spectrum analysis of the electromagnetic field structure, a solution valid for tightly focused radially polarized few-cycle laser pulses propagating in vacuum is presented. The resulting field distribution is significantly different from that based on the paraxial approximation for pulses with either small or large beam diameters. We compare the electron accelerations obtained with the two solutions and find that the energy gain obtained with our new solution is usually much larger than that with the paraxial approximation solution.

关键词： radially polarized laser pulses few-cycle pulses plane-wave angular spectrum analysis,direct laser acceleration of electrons

Investigation on strong nonlinear interactions between underwater explosion and water surface based on compressible multiphase flow with phase transition

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Journal of Hydrodynamics 2023年第2期35卷 351-364页

作者： Jun Yu Hai-kun Wang zhen-xin sheng Yi Hao China Ship Scientific Research Center Wuxi214082China Taihu Laboratory of Deep-sea Technological Science Wuxi214082China

The strong nonlinear interactions between underwater explosion and water surface were numerically investigated using a phase transition model based on a four-equation system,which can deal with the complex deformable interface among different phases,including water,air,explosion bubble,and *** numerical method is verified by comparing the numerical results with experimental results,and good agreements are *** study considers an ideal sine wave for simulating the shape of water *** examples of different detonation depths of charge are *** each example,the first case is the basic simulation without surface wave,and the other three cases are the simulations with sine waves of different *** characteristics of the interactions,such as shock wave propagation,explosion bubble expansion,and the generation,development,and collapse of cavitation,are observed in the numerical *** capturing the detailed density and pressure contours during the interaction process,we can better understand the underlying mechanisms of the explosion bubble,cavitation,and surface *** numerical results demonstrate that geometric nonlinearity impacts cavitation evolution and the explosion bubble movement ***,the secondary cavitation phenomenon has been found in the cases without surface wave,and its fundamental physical mechanism is presented in *** present results can expand the existing database of multiphase flow in the underwater explosion and provide an insight into the strong nonlinear interaction between the underwater explosion and water surface.

关键词： Underwater explosion compressible multiphase flow phase transition model cavitation water surface

Polarization independent superconducting nanowire detector with high-detection efficiency

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Rare Metals 2015年第2期34卷 71-76页

作者： He-Yu Yin Han Cai Ri-sheng Cheng zheng Xu zhen-Nan Jiang Jian-She Liu Tie-Fu Li Wei Chen Tsinghua National Laboratory for Information Science and Technology Department of Microelectronics and Nanoelectronics Tsinghua University Institute of Microelectronics Tsinghua University

The superconducting nanowire single photon detector（SNSPD） draws much attention because of its attractive performance at ultra violet, visible, and nearinfrared wavelengths, and it can be widespread in quantum information technologies. However, how to increase the absorption which can dramatically increase the quantum efficiency of the SNSPD is still a top research issue. In this study, the effect of incident medium and cavity material on the optical absorptance of cavity-integrated SNSPDs was systematically investigated using finite-element method. The simulation results demonstrate that for photons polarized parallel to nanowire orientation, even though the maximum absorptance of the nanowire is insensitive to cavity material,it does increase when the refractive index of incident medium decreases. For perpendicularly polarized photons, both incident medium and cavity material play significant roles,and the absorptance curves get closer to the parallel case as the refractive index of cavity material increases. Based on these results, two cavity-integrated SNSPDs with frontillumination structure which can enhance the absorptance for both parallel and perpendicular photons are ***, a design to realize polarization-independent SNSPDs with high absorptance is presented.

关键词： Polarization-independent Distributed Braggreflective High-detection efficiency Superconductingnanowire single photon detector

A revised rotation curve of the Milky Way with maser astrometry

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Research in Astronomy and Astrophysics 2013年第7期13卷 849-861页

作者： Xiao-sheng Xin Xing-Wu zheng School of Astronomy and Space Science Nanjing University

We reconstruct the rotation curve of the Milky Way using the new trigono-metric parallax and proper motion data for masers in 43 high-mass star-forming re-gions obtained by VLBI, as well as the existing data from the literature, based on a new set of galactic constants （R0, -0） = （8.4 kpc, 254 km s^-1） measured by Reid et al. The revised rotation curve of the Milky Way is almost fiat or slightly rising in the region from about 6 to 15 kpc. The rotation velocities within 5 kpc of the Galactic center, as determined by VLBI, differ from those obtained by measurement of the HI-and CO-line tangent velocities. We fitted the revised rotation curve arising from three mass components： the bulge, disk and dark matter halo. The total mass of the Milky Way is found to be 2.3× 10^11 M⊙ （20 kpc）. This is about 10% larger than that from Sofue et al, and is comparable with the mass of M31, 3.4× 10^11 M⊙ （35 kpc）, given by Carignan et al. The limited accurate observational data, especially the VLBI data, do not permit a fully satisfactory fit to the rotation curve. The extensive par-allax and proper motion data that will be produced by the Bar and Spiral Structure Legacy Survey project in the next few years should lead to considerable progress in understanding the rotation curve and dark matter halo of the Milky Way.

关键词： Galaxy: structure - Galaxy: bulge - Galaxy: disk - Galaxy: halo-dark matter - masers

Gitelman syndrome caused by a rare homozygous mutation in the SLC12A3 gene:A case report

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World Journal of Clinical Cases 2020年第18期8卷 4252-4258页

作者： Ri-zhen Yu Mao-sheng Chen Department of Nephrology Division Zhejiang Provincial People’s HospitalPeople’s Hospital of Hangzhou Medical CollegeHangzhou 310014Zhejiang ProvinceChina

BACKGROUND Gitelman syndrome(GS)is an unusual,autosomal recessive salt-losing tubulopathy characterized by hypokalemic metabolic alkalosis,hypomagnesemia and *** is caused by mutations in the solute carrier family 12 member 3(SLC12A3)gene resulting in disordered function of the thiazidesensitive NaCl *** date,many types of mutations in the SLC12A3 gene have been discovered that trigger different clinical ***,gene sequencing should be considered before determining the course of treatment for GS *** SUMMARY A 55-year-old man was admitted to our department due to hand numbness and *** tests after admission showed hypokalemia,metabolic alkalosis and renal failure,all of which suggested a diagnosis of *** sequencing of DNA extracted from the patient’s peripheral blood showed a rare homozygous mutation in the SLC12A3 gene(NM_000339.2:chr16:56903671,Exon4,c.536T>A,***179Asp).This study reports a rare homozygous mutation in SLC12A3 gene of a Chinese patient with *** Genetic studies may improve the diagnostic accuracy of Gitelman syndrome and improve genetic counseling for individuals and their families with these types of genetic disorders.

关键词： Gitelman syndrome Hypokalemia SLC12A3 Homozygous Rare mutation Case report

Helium,Argon and Carbon Isotopic Compositions of Spring Gases in the Hainan Island,China

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Acta Geologica Sinica(English Edition) 2012年第6期86卷 1515-1523页

作者： XU sheng zheng Guodong XU Yongchang Key Laboratory of Petroleum Resources Research Institute of Geology and GeophysicsChinese Academy of Sciences Scottish Universities Environmental Research Centre University of Glasgow

Chemical and isotopic compositions have been measured for N2-He-rich bubbling gases discharging from hot springs in the Hainan Island, Southern China. Observed 3He/4He ratios （0.1-1.3 RA） indicate the occurrence of a mantle component throughout the island, which has been highly diluted by a crustal radiogenic 4He component. The occurrence of mantle-derived helium is high in the northern island （12%-16% of total He） and gradually decreases towards southern coast （1%-3% of total He）. Such a distribution pattern is most likely controlled by the Pleocene-Quaternary volcanic activities in the northern island and groundwater circulation along the deep major faults. The 4~Ar/36Ar and N2/Ar ratios suggest that N2 and Ar of the hot spring gases are mostly meteoric. Although 13C values of CO2 （-20%0 to -27%0） with low concentrations are consistent with the biogenic origin, the combination of SHe/4He and 51SCco2 suggests a two end-member mixing of mantle and crustal components with CO2/3He ratios of 2x 109 and 8 1011, respectively. However, the low CO2/3He ratios （1- 22106） can not be ascribed in terms of the simple mixing but has to be explained by the addition of radiogenic 4He and loss of CO2 by calcite precipitation in the hydrothermal system, which is most likely controlled by the degree of gas-water-rock interaction.

关键词： He-Ar-C isotopes mantle-derived He hot spring gas Hainan Island

Tuning Thermal Gelling Behavior of N-isopropylacrylamide Based Copolymer through Introducing Cucurbit[8]uril Ternary Complex on Side-chain

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Chinese Journal of Polymer Science 2016年第10期34卷 1251-1260页

作者： hai-li ma hao chen sheng-zhen hou 谭业邦 School of Chemistry and Engineering Shandong University Jinan 250100 China

Thermo-gelation polymers have attracted increasing attention over decades. However, rare facile tuning method of sol-gel transition temperature restricted the wider application. Preceding study indicated that supramolecular interactions demonstrated a powerful means to control the structure and property of polymeric materials. Here we designed an N-isopropylacrylamide （NIPAM） based thermo-sensitive copolymer with naphthyl （Np） on its side chain. Positive-charged side-chain ternary complex was formed with cucurbit[8]uril （CB[8]） and methylviologen （MV2＋） via CB[8]-enhanced intermolecular charge-transfer （CT） interaction. Introducing the ternary complex CB[8]/MV2＋/Np on side-chain altered microstructure of macromolecular chains and led to a strong tendency for thermo gelation. Altering content of CB[8] and MV2＋ changed content of the positive-charged side-chain ternary complex and varied gelation temperature. Therefore, introducing supramolecular interaction endowed the hydrogel with tunable gelation property.

关键词： Thermo-sensitive copolymer Supramolecular chemistry Cucurbituril Charge transfer interaction Gelation.