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Entanglement Dynamics of Multipartite Systems Under Decoherence from a Spin Environment

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Communications in Theoretical Physics 2006年第1X期46卷 73-76页

作者： xie Guo-Qiu WANG An-min MA Xiao-San Department of Modern Physics University of Science and Technology of China Hefei 230026 China Department of Electronic Information and Engineering Huangshan University Huangshan 245000 China

The entanglement evolution of multipartite quantum states under a spin environment is analyzed. Due to interaction, the extent to which the entanglement vanishes depends not only on the size of system and the structure of quantum states, but also on the exchange couplings with environment. The decoherence-free subspaces have been identified by using the linear entropy.

关键词： entanglement dynamics decoherence a spin environment

Atomic Coherent Trapping and Properties of Trapped Atom

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Communications in Theoretical Physics 2006年第3X期46卷 556-560页

作者： YANG Guo-Jian XIA Li-Xin xie min Department of Physics Beijing Normal University Beijing 100875 China

Based on the theory of velocity-selective coherent population trapping, we investigate an atom-laser system where a pair of counterpropagating laser fields interact with a three-level atom. The influence of the parametric condition on the properties of the system such as velocity at which the atom is selected to be trapped, time needed for finishing the coherent trapping process, and possible electromagnetically induced transparency of an altrocold atomic medium, etc., is studied.

关键词： velocity selective coherent population trapping ultracold atom

Tumor microenvironment: driving forces and potential therapeutic targets for breast cancer metastasis

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Chinese Journal of Cancer 2017年第3期36卷 121-130页

作者： Hong-Yan xie Zhi-min Shao Da-Qiang Li Shanghai Cancer Center and Institutes of Biomedical Sciences Shanghai Medical CollegeFudan UniversityShanghai 200032P.R.China Cancer Institute Shanghai Medical CollegeFudan UniversityShanghai 200032P.R.China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032P.R.China Key Laboratory of Breast Cancer in Shanghai Shanghai Medical CollegeFudan UniversityShanghai 200032P.R.China Department of Breast Surgery Shanghai Medical CollegeFudan UniversityShanghai 200032P.R.China

Distant metastasis to specific target organs is responsible for over 90%of breast cancer?related deaths,but the underlying molecular mechanism is *** evidence suggests that the interplay between breast cancer cells and the target organ microenvironment is the key determinant of organ?specific metastasis of this lethal ***,we highlight new findings and concepts concerning the emerging role of the tumor microenvironment in breast cancer metastasis;we also discuss potential therapeutic intervention strategies aimed at targeting compo?nents of the tumor microenvironment.

关键词： Breast cancer Invasion and metastasis Tumor microenvironment

Price Competition in the Random Coefficient Attraction Choice Models with Linear Cost

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Journal of the Operations Research Society of China 2022年第3期10卷 623-658页

作者： Xiao-Yi Feng Yang-Yang xie Hou-min Yan Department of Model Risk Management The Hongkong and Shanghai Banking Corporation LimitedHong KongChina International Institute of Finance School of ManagementUniversity of Science and Technology of ChinaHefei230026AnhuiChina Department of Management Sciences College of BusinessCity University of Hong KongHong KongChina

We study the pricing game between competing retailers under various random coefficient attraction choice *** characterize existence conditions and structure properties of the ***,we explore how the randomness and cost parameters affect the equilibrium prices and profits under multinomial logit(MNL),multiplicative competitive interaction(MCI)and linear attraction choice ***,with bounded randomness,for the MCI and linear attraction models,the randomness always reduces the retailer’s ***,for the MNL model,the effect of randomness depends on the product’s value *** high-end products(i.e.,whose value gap is higher than a threshold),the randomness reduces the equilibrium profit,and vice *** results suggest high-end retailers in MNL markets exert more effort in disclosing their exact product performance to *** also reveal the effects of randomness on retailers’pricing *** results help retailers in making product performance disclosure and pricing decisions.

关键词： Pricing game Random coefficient choice models Equilibrium existence Effects of randomness

Peginterferon alfa-2a for the treatment of chronic hepatitis C in the era of direct-acting antivirals

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Hepatobiliary & Pancreatic Diseases International 2017年第5期16卷 470-479页

作者： Yan Huang ming-Hui Li min Hou Yao xie Shanghai Roche Pharmaceuticals Ltd. Shanghai 201203 China Liver Disease Center Beijing Ditan Hospital Capital Medical University Beijing 100015 China

BACKGROUND: The availability of novel direct-acting antivirals (DAAs) represents a new era of curative hepatitis C virus (HCV) treatment, with over 95% of patients infected with HCV genotype 1 achieving sustained virological response (SVR). Nevertheless, the majority of patients globally are unable to access these treatments because of cost and infrastructure constraints and, thus, remain untreated and uncured. DATA SOURCE: Relevant articles of peginterferon (PegIFN)-based treatments in HCV and sofosbuvir-based treatments, simeprevir, daclatasvir/asunaprevir, ritonavir-boosted paritaprevir/ombitasvir/dasabuvir, and grazoprevir/elbasvir, were searched in PubMed database, including general population and special population. RESULTS: PegIFN in combination with ribavirin remains an important and relevant option for some patients, achieving SVR rates of up to 79% in genotype 1 and 89% in genotype 2 or 3 infections, which increases for patients with favorable IL28B genotypes. Triple therapy of DAA plus PegIFN/ribavirin is effective in treating difficult-to-cure patients infected with HCV genotype 3 or with resistance-associated variants. Owing to its long history in HCV management, the efficacy, tolerability and long-term outcomes associated with PegIFN alfa-2a are well established and have been validated in large-scale studies and in clinical practice for many populations. Furthermore, emerging data show that IFN-induced SVR is associated with lower incidences of hepatocellular carcinoma compared with DAAs. On the contrary, novel DAAs have yet to be studied in special populations, and long-term outcomes, particularly tumor development and recurrence in patients with cirrhosis and/or hepatocellular carcinoma, and reactivation of HBV in dually infected patients, are still unclear. CONCLUSION: In this interferon-free era, PegIFN-based regimens remain a safe and effective option for selected HCV patients.

关键词： chronic hepatitis C direct-acting antivirals hepatitis C virus peginterferon alfa-2a ribavirin

Detection,isolation,and identification of cadmium-resistant bacteria based on PCR-DGGE

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Journal of Environmental Sciences 2007年第9期19卷 1114-1119页

作者： HU Qing DOU min-na QI Hong-yan xie Xiang-ming ZHUANG Guo-qiang YANG min Department of Environmental Biotechnology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China. Biology Science and Technology College Beijing Forestry University Beijing 100083 China

This study focused on the screening of cadmium-resistant bacterial strains from Pb-Zn tailing. We investigated the diversity of microbial community inhabiting Dong-san-cha Pb-Zn tailing in Beijing, China, by polymerase chain reaction-denaturing gradient gel electrophoresis （DGGE） of 16S rRNA gene of bacterial strain, and found two dominant strains in the DGGE profile. Using special culture media, we isolated two strong cadmium-resistant bacterial strains. On the basis of morphological, physiological, and biochemical characteristics, BIOLOG, and 16S rDNA sequencing, the two strains were identified as Bacillus cereus and Enterobacter cloacae. minimal inhibitory concentrations （MICs） of heavy metals for the bacteria were determined. E. cloacae showed higher MIC values for heavy metals and a larger range of antibiotic resistance than B. cereus.

关键词： Bacillus cereus Enterobacter cloacae PCR-DGGE cadmium resistance antibiotic resistance

Long-pulse, single-frequency 1064 nm laser and frequency doubling

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High Power Laser Science and Engineering 2015年第3期3卷 66-70页

作者： Xiafei Xu Gang xie Yanhua Lu Lei Zhang min Wan Institute of Applied Electronics CAEP Graduate School of China Academy of Engineering Physics

An all-solid-state single-frequency 1064 nm laser with a 100 μs pulse width, 500 Hz repetition rate and 700 m J single pulse energy is designed using seed injection and a three-stage master oscillator power amplifier(MOPA) *** this as a basis, research on long-pulse laser frequency doubling is carried out. By designing and optimizing the lithium triborate(LBO) crystal, the theoretically calculated maximum conversion efficiency ηmax reaches 68% at M2=1, while ηminis 33% at M2=3. Generation of 212 m J pulses of green light with a repetition rate as high as500 Hz is obtained from a fundamental energy of 700 m J. The experimental conversion efficiency reaches 31% and the power stability is better than±1%.

关键词： all-solid-state frequency doubling MOPA construction single-frequency laser

First Principles Study of Uranium Solubility in Gd2Zr2O7 Pyrochlore

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Chinese Journal of Chemical Physics 2015年第6期28卷 -页

作者： Qing-yun Chen Kai-min Shih Chuan-min Meng Lie-lin Wang Hua xie Tao Wu Key Subject Laboratory of National Defense for Radioactive Waste and Environmental Security Southwest University of Science and Technology Mianyang 621010 China Department of Civil Engineering The University of Hong Kong Pokfulam Road Hong Kong SARChina Key Lab for Shock Wave and Detonation Physics Research Institute of Fluid Physics Chinese Academy of Engineering Physics Mianyang 621900

Ab initio calculation is performed to investigate the uraniumsolubility in different sites of Gd2Zr2O7 pyrochlore. The Gd2Zr2O7 maintains its pyrochlore structure at low uraniumdopant levels, and the lattice constants of Gd2(Zr2?yUy)O7 and (Gd2?yUy)Zr2O7 are generally expressed as being linearly related to the uranium content y. Uranium is found to be a preferable substitute for the B-site gadolinium atoms in cation-disordered Gd2Zr2O7 (where gadolinium and zirconium atoms are swapped) over the A-site gadolinium atoms in ordered Gd2Zr2O7 due to the lower total energy of (Gd2?yZry)(Zr2?yUy)O7.

关键词： Gd2Zr2O7 pyrochlore Nuclear waste Uranium solubility Density functional theory

Substituent Influence of Yttria by Gadolinia on the Tetragonal Phase Stability for Y_2O_3-Ta_2O_5-ZrO_2 Ceramics at 1300℃

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Journal of Materials Science & Technology 2014年第4期30卷 381-386页

作者： Xiaoqing Niu min xie Fen Zhou Rende Mu Xiwen Song Shengli An Inner Mongolia Key Laboratory of Advanced Ceramics and Device School of Materials and MetallurgyInner Mongolia University of Science and Technology Beijing Institute of Aeronautical Materials

The influences of equimolar substitution of yttria by gadolinia on the phase constituent and stability for Y203- Ta2Os-Zr02 ceramics have been investigated. The ceramics with the Gd content lower than 8 tool% exhibit pure tetragonal phase as well as high tetragonal phase stability. However, the high Gd containing ceramics consist of t-Zr02, m-Zr02 and monoclinic GdTa04 and show complicated phase evolution behaviors. The fractions of monoclinic Zr02 and GdTa04 increase with increasing Gd content, indicating that the excessive substitution of Gd for Y results in a reduction in the tetragonal phase stability. In addition, the lower Gd containing ceramics show an almost invariable tetragonality, while the higher Gd containing ceramics reveal a composition-dependent tetragonality. Accordingly, an association of the tetragonal phase stability and tetragonality with the Gd concentration is established, which provides us a clue to understand the phase stability of these ceramics.

关键词： Ceramics Zr02 X-ray diffraction Thermal stability