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Random Neighbor Sandpile Model with Constrained Total Energy

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Chinese Physics Letters 2000年第1期17卷 37-39页

作者： ZHANG shu-dong Institute of Low Energy Nuclear Physics Beijing Normal UniversityBeijing 100875

We propose an energy-constrained sandpile model with random *** critical behavior of the model is in the same universality class as the mean-field self-organized criticality *** critical energy Ec depends on the number of neighbors n of each site,but the various exponents do *** n=6,we got that Ec=0.4545;and a sei匸similar structure of the energy distribution function with five major peaks is also *** is a natural result of system dynamics and the way the system is disturbed.

关键词： system neighbor critical

Hydrogenic donor impurity states and intersubband optical absorption spectra of monolayer transition metal dichalcogenides in dielectric environments

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Chinese Physics B 2023年第5期32卷 619-626页

作者：吴曙东 College of Physics Science and Technology Yangzhou UniversityYangzhou 225002China

The hydrogenic donor impurity states and intersubband optical absorption spectra in monolayer transition metal dichalcogenides(ML TMDs) under dielectric environments are theoretically investigated based on a two-dimensional(2D)nonorthogonal associated Laguerre basis set. The 2D quantum confinement effect together with the strongly reduced dielectric screening results in the strong attractive Coulomb potential between electron and donor ion, with exceptionally large impurity binding energy and huge intersubband oscillator strength. These lead to the strong interaction of the electron with light in a 2D regime. The intersubband optical absorption spectra exhibit strong absorption lines of the non-hydrogenic Rydberg series in the mid-infrared range of light. The strength of the Coulomb potential can be controlled by changing the dielectric environment. The electron affinity difference leads to charge transfer between ML TMD and the dielectric environment, generating the polarization-electric field in ML TMD accompanied by weakening the Coulomb interaction strength. The larger the dielectric constant of the dielectric environment, the more the charge transfer is, accompanied by the larger polarization-electric field and the stronger dielectric screening. The dielectric environment is shown to provide an efficient tool to tune the wavelength and output of the mid-infrared intersubband devices based on ML TMDs.

关键词： monolayer transition metal dichalcogenides hydrogenic donor impurity intersubband optical absorption dielectric environment nonorthogonal associated Laguerre basis

Lifting Unitary Elements with Application to Approximately Inner Automorphisms

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Acta Mathematica Sinica,English Series 2007年第10期23卷 1745-1750页

作者： Xiao Chun FANG shu dong LIU Department of Mathematics Tongji University Shanghai 200092 P. R. China Department of Mathematics Qufu Normal University Qufu 273165 P. R. CHina

Let A be a separable unital nuclear simple C＊-algebra with torsion K0 （A）, free K1 （A） and with the UCT. Let T ： A→M（K）/K be a unital homomorphism. We prove that every unitary element in the commutant of T（A） is an exponent, thus it is liftable. We also prove that each automorphism α on E with α ∈ Aut0（A） is approximately inner, where E is a unital essential extension of A by K and α is the automorphism on A induced by α.

关键词： C*-algebra extension automorphism

Current research of hepatic cirrhosis in China

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World Journal of Gastroenterology 2005年第5期11卷 617-622页

作者： Xi-XianYao shu-LinJiang dong-MeiYao SecondHospital HebeiMedicalUniversityShijiazhuang050000HebeiProvinceChina

Hepatic cirrhosis is a common disease that poses a serious threat to public health, and is characterized by chronic,progressive and diffuse hepatic lesions preceded by hepaticfibrosis regardless of the exact etiologies. In recent years,considerable achievements have been made in China in research of the etiopathogenesis, diagnosis and especially the treatment of hepatic fibrosis, resulting in much improved prognosis of hepatic fibrosis and cirrhosis. In this paper, the authors review the current status of research in hepatic fibrosis, cirrhosis and their major complications.

关键词： Hepatic cirrhosis China

Insights on Chinese and European consensus for USgHIFU treatment of pancreatic cancer

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Hepatobiliary Surgery and Nutrition 2024年第5期13卷 847-849页

作者： Zhiqiang Meng shu dong Minimally Invasive Therapy Center Shanghai Cancer CenterFudan UniversityShanghaiChina Department of Oncology Shanghai Medical CollegeFudan UniversityShanghaiChina

The article“US-guided high-intensity focused ultrasound in pancreatic cancer treatment:a consensus initiative between Chinese and European HIFU centers”by Zhou et *** a valuable overview of the application of ultras... 详细信息

关键词： Pancreatic cancer high-intensity focused ultrasound(HIFU) commentary ultrasound-guided high-intensity focused ultrasound(USgHIFU) treatment consensus

Formation Mechanism and Emission Spectrum of AlO Radicals in Reaction of Laser-ablated Al Atom and Oxygen

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Chemical Research in Chinese Universities 2003年第3期19卷 320-323页

作者： ZHANG shu-dong LI Hai-Yang Laboratory of Environmental Spectroscopy Anhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031P.R.China Graduate School of the Chinese Academy of Sciences Beijing 100039P.R.China Physics and Electronic Engineering College Northwest Normal UniversityLanzhou 730070P.R.China

The emission spectrum of AlO radicals was analyzed in 440-540 nm in the reaction of laser ablated Al beam and O 2. The carrier of spectrum was assigned to Δ ν =0, ±1, ±2 vibrational sequences of B 2Σ +-X 2Σ + transition of AlO radicals, the observed maximum vibrational quantum number was ν ′=6. The rotational and vibrational temperatures of B state were estimated at 3000 and 7500 K by spectrally simulating the rovibronic population distribution. There is a strong evidence that the production of excited Al( 2 S ) atoms is essential to the formation of excited AlO radicals.

关键词： Laser ablation Emission spectrum AlO Chemiluminescence reaction

An energy efficient clustering routing algorithm for wireless sensor networks

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The Journal of China Universities of Posts and Telecommunications 2006年第3期13卷 71-75页

作者： LI Li dong shu-song WEN Xiang-ming Institute of Continuing Education School Beijing University of Posts and Telecommunications Beijing 100876 China

This article proposes an energy efficient clustering routing （EECR） algorithm for wireless sensor network. The algorithm can divide a sensor network into a few clusters and select a cluster head base on weight value that leads to more uniform energy dissipation evenly among all sensor nodes. Simulations and results show that the algorithm can save overall energy consumption and extend the lifetime of the wireless sensor network.

关键词： wireless sensor network clustering routing energy

Norm Equalities and Inequalities for Three Circulant Operator Matrices

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Acta Mathematica Sinica,English Series 2017年第4期33卷 571-590页

作者： Zhao Lin JIANG Yun Cheng QIAO shu dong WANG School of Sciences Linyi University Linyi 276005 P. R. China

In this paper, three new circulant operator matrices, scaled circulant operator matrices,diag-circulant operator matrices and retrocirculant operator matrices, are given respectively. Several norm equalities and inequalities for these operator matrices are proved. We show the special cases for norm equalities and inequalities, such as the usual operator norm and the Schatten p-norm. Pinching type inequality is also given for weakly unitarily invariant norms. These results are closely related to the nice structure of these special operator matrices. Furthermore, some special cases and specific examples are also considered.

关键词： Operator matrix norm scaled circulant diag-circulant retrocirculant

Science Letters:A robust polysilicon-assisted SCR in ESD protection application

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第12期8卷 1879-1883页

作者： CUI Qiang HAN Yan dong shu-rong LIOU Juin-jie ESD Lab Institute of Microelectronics and Photoelectronics Zhejiang University Hangzhou 310027 China Research Center for Embedded System Zhejiang University Hangzhou 310027 China Department of Electrical and Computer Engineering University of Central Florida Orlando 32816 USA

A novel polysilicon-assisted silicon-controlled rectifier （SCR） is presented and analyzed in this paper, which is fabricated in HHNEC＇s 0.18μm EEPROM process. The polysilicon-assisted SCRs take advantage of polysilicon layer to help bypass electro-static discharge （E S D） current without occupying extra layout area. TLP current-voltage （I-V） measurement results show that given the same layout areas, robustness performance of polysilicon-assisted SCRs can be improved to 3 times of conventional MLSCR＇s. Moreover, one-finger such polysilicon-assisted SCRs, which occupy only 947 [3mz layout area, can undergo 7-kV HBM ESD stress. Results further demonstrate that the S-type I-V characteristics of polysilicon-assisted SCRs are adjustable to different operating conditions by changing the device dimensions. Compared with traditional SCRs, this new SCR can bypass more ESD currents and consumes smaller IC area.

关键词： Electro-static discharge (ESD) Silicon-controlled rectifier (SCR) Robustness performance Polysilicon-assisted Human body model (HBM)