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Steered coherence and entanglement in the Heisenberg XX chain under twisted boundary conditions

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Chinese Physics B 2021年第7期30卷 139-144页

作者： Yu-Hang Sun Yu-xia xie School of Science Xi'an University of Posts and TelecommunicationsXi'an 710121China

We study steered coherence(SC)and entanglement in a three-spin Heisenberg XX model under twisted boundary conditions and show that their strengths can be significantly enhanced by tuning the twist *** optimal twist angleθ_(opt)for achieving the maximum l_(1) norm of SC isπin the region of weak field B and decreases gradually fromπto 0 when B increases after a critical value,while for the relative entropy of SC,θ_(opt)equalsπin the weak field region and 0 *** entanglement and the critical temperature above which the entanglement vanishes can also be significantly enhanced by tuning the twist angle from 0 toπ.

关键词： quantum coherence entanglement twisted boundary conditions

A Robust Discontinuous Galerkin Method for Solving Convection-diffusion Problems

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Acta Mathematicae Applicatae Sinica 2008年第3期24卷 483-496页

作者： Zuo-zheng Zhang Zi-qing xie xia Tao College of Mathematics and Computer Science Hunan Normal University Changsha 410081 China

In this paper, a new DG method was designed to solve the model problem of the one-dimensional singularly-perturbed convection-diffusion equation. With some special chosen numerical traces, the existence and uniqueness of the DG solution is provided. The superconvergent points inside each element are observed. Particularly, the 2p ＋ 1-order superconvergence and even uniform superconvergence under layer-adapted mesh are observed numerically.

关键词： Discontinuous Galerkin method singularly perturbed convection-diffusion numerical traces

Effect of SO_2 on the performance of Ag-Pd/Al_2O_3 for the selective catalytic reduction of NOx with C_2H_5OH

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Journal of Environmental Sciences 2006年第5期18卷 973-978页

作者： xie Shu-xia YU Yun-bo WANG Jin HE Hong State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

The influence of SO2 on the performance of Ag-Pd/Al2O3 for the selective catalytic reduction （SCR） of NOx with C2H5OH was investigated experimentally. The activity test results suggest that Ag-Pd/Al2O3 shows a small activity loss in the presence of SO2 when using C2H5OH as a reductant. In situ DRIFTS spectra show that the activity loss originates from the formation of surface sulphate species on the Ag-Pd/Al2O3. The surface sulphate species formation inhibits the formation of nitrate, whereas hardly changes the partial oxidation of C2H5OH. Compared with the NOx reduction by C3H6, an obvious suppression of the surface sulphate species formation was observed by DRIFTS experiment when using C2H5OH as a reductant. This phenomenon reveals the better catalytic performance and strong SO2 tolerance of Ag-Pd/Al2O3-C2H50H system.

关键词： sulphate SCR nitrate enolic species isocyanate reaction mechanism

Spatial and Temporal Differences of Climate Suitability of Ice and Snow Sports in Major Ski Tourism Destinations in China

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Chinese Geographical Science 2024年第5期34卷 967-982页

作者： xie xia PANG Zhengjin ZHU Haiqiang GAO Jun ZHOU Qiaoya Key Laboratory of the Sustainable Development of Xinjiang’s Historical and Cultural Tourism Xinjiang UniversityUrumqi 830046China College of Tourism Xinjiang UniversityUrumqi 830046China School of Tourism Management Sun Yat-sen UniversityZhuhai 519000China

Ice and snow tourism in China has grown significantly since the country successfully hosted the Beijing Winter *** conditions profoundly impact the development of ice and snow tourism;however,most studies have focused on constructing different climate suitability indicators for ice and snow tourism to evaluate individual regions,lacking horizontal comparative studies across multiple *** study aims to enrich the connotation of climate suitability for ice and snow sports,establish an evaluation model based on snowfall amount,temperature,and wind speed,and use daily meteorological data from 1991 to 2021 to horizontally compare the climate suitability for ice and snow sports in major ski tourism destinations in *** study boasts four major findings:1)the average ice and snow sports climate index of each region decreases over time,and the overall suitability of the climate for ice and snow sports is reducing;2)northern Xinjiang exhibits the most evident regional differentiation from‘very suitable’to‘generally suitable’;3)the spatial zoning of climate suitability for ice and snow sports exhibits heterogeneity,as northern Xinjiang is divided into two‘suitable and above’zones with rotating empirical orthogonal function(REOF).Correspondingly,the four provinces of Hebei,Heilongjiang,Jilin,and Liaoning are divided into three‘generally suitable and above’zones;4)snowfall amount is the main factor affecting the climate suitability of ice and snow sports in the major ski tourist destinations in China.

关键词： ice and snow tourism climate suitability rotating empirical orthogonal function(REOF) spatial division China

A highly selective chemosensor for copper ion based on ICT fluorescence

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Chinese Chemical Letters 2012年第5期23卷 607-610页

作者： Fang Ying Wu Sheng Gen Cao Cai xia xie Department of Chemistry and Center of Analysis and Testing Nanchang University.Nanchang 330031.China

Simple structural compounds 1 to 3 were *** presence of Cu^（2＋） resulted in the fluorescence and absorption spectra change of 1 and 2,which indicated that 1 and 2 showed a highly selective response to Cu^（2＋） over other metal ***,3 showed no selectivity for metal ions,which means that the compound could bind with several metal ions,such as,Ni^（2＋）,Zn^（2＋）,Cd^（2＋）.Hg^（2＋）, Pb^（2＋）,Fe^（3＋）,Mg^（2＋）,Ca^（2＋）,and Co^（2＋）,except Cu^（2＋） and Ag~＋.The different spectral responses were attributed to the difference in binding sites for 1 and 3.

关键词： 4-Dimethylaminobenzoylamino derivatives ICT fluorophore Cu^(2+) Dual spectral response

Protective effects of a polysaccharide from Spirulina platensis on dopaminergic neurons in an MPT-Pinduced Parkinson's disease model in C57BL/6J mice

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Neural Regeneration Research 2015年第2期10卷 308-313页

作者： Fang Zhang Jian Lu Ji-guo Zhang Jun-xia xie Department of Pharmacology Medical College of Qingdao University Department of Pharmacy Xianyang Central Hospital Department of Pharmacology Taishan Medical College Department of Physiology Medical College of Qingdao University

The present study aimed to determine whether a polysaccharide obtained fromSpirulina platensis shows protective effects on dopaminergic neurons. A Parkinson’s disease model was established through the intraperitoneal injection of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyr-idine （MPTP） in C57BL/6J mice. Prior to the MPTP injection, some mice were pretreated with intraperitoneal injections of a polysaccharide derived fromSpirulina platensis once daily for 10 days. The results showed that the immunoreactive staining and mRNA expression of the dopa-mine transporter and tyrosine hydroxylase, the rate-limiting enzyme in dopamine synthesis, in the substantia nigra, were signiifcantly increased in mice pretreated with 800 mg/kg of the poly-saccharide compared with those in MPTP-treated mice. The activities of superoxide dismutase and glutathione peroxidase in the serum and midbrain were also increased signiifcantly in mice injected with MPTP after pretreatment with the polysaccharide fromSpirulina platensis. By con-trast, the activity of monoamine oxidase B in serum and midbrain maintained unchanged. These experimental ifndings indicate that the polysaccharide obtained fromSpirulina platensis plays a protective role against the MPTP-induced loss of dopaminergic neurons in C57BL/6J mice, and that the antioxidative properties of this polysaccharide likely underlie its neuroprotective effect.

关键词： nerve regeneration polysaccharide from Spirulina platensis Parkinson’s disease MPTP dopaminergic neurons antioxidation neural regeneration

Effects of Atomic Coherence and Injected Classical Field on Chaotic Dynamics of Non-degenerate Cascade Two-Photon Lasers

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Communications in Theoretical Physics 2007年第2X期48卷 288-294页

作者： ZHANG Ya-Jun HUANG Hong-Bin YANG Peng xie xia Department of Physics Southeast University Nanjing 210096 China Nanjing Institute of Astronomical Optics and Technology Nanjing 210042 China

Based on the cascade two-photon laser dynamic equation derived with the technique of quantum Langevin operators with the considerations of coherently prepared three-level atoms and the classical field injected into the cavity, we numerically study the effects of atomic coherence and classical field on the chaotic dynamics of a two-photon laser. Lyapunov exponent and bifurcation diagram calculations show that the Lorenz chaos and hyperchaos can be induced or inhibited by the atomic coherence and the classical field via crisis or Hopf bifurcations.

关键词： nondegenerate cascade two-photon laser chaos bifurcation injected classical field atomic coherence

Soil Organic N Forms and N Supply as Affected by Fertilization Under Intensive Rice Cropping System

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Pedosphere 2006年第3期16卷 345-353页

作者： ZHANG Qi-Chun WANG Guang-Huo xie Weng-xia College of Environmental and Natural Resources Science Zhejiang University Hangzhou 310029 （China）

Changes of soil organic nitrogen forms and soil nitrogen supply under continuous rice cropping system were investigated in a long-term fertilization experiment in Jinhua, Zhejiang Province, China. The fertilizer treatments included combination of P-K, N-K, N-P, and N-P-K as well as the control. After six years of continuous double-rice cropping, total soil N and hydrolysable N contents remained stable in plots with N treatments, while the hydrolysable N contents were substantially reduced in those plots without N application. Compared to the unbalanced fertilization treatments, P and K increased the percentage of hydrolysable ammonium N in the total soil N with the balanced application of N, and also maintained higher rice grain yields and nitrogen uptake. Grain yield was positively correlated with total N uptake (r = 0.875**), hydrolysable N (r = 0.608**), hydrolysable ammonium N (r = 0.560**) and the hydrolysable unknown N (r = 0.417**). Total N uptake was positively correlated with hydrolysable N (r = 0.608**), hydrolysable ammonium N (r = 0.440**) and hydrolysable unknown N (r = 0.431**). Soil nutrient depletion and/or unbalanced fertilization to rice crop reduced N content in soil microbial biomass, and therefore increased C/N ratio, suggesting a negative effect on the total microbial biomass in the soil.

关键词： continuous cropping microbial biomass organic N forms rice

Effectivity and safety of trifocal intraocular lenses and capsular tension rings implantation for cataract patients with axial high myopia

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International Journal of Ophthalmology(English edition) 2024年第3期17卷 499-508页

作者： Shan Hua Qiu-xia xie Hu Wang Jing-xiang Zhong Dongguan Aier Eye Hospital Jinan UniversityDongguan 523106Guangdong ProvinceChina Department of Ophthalmology the First Affiliated Hospital of Jinan UniversityGuangzhou 510630Guangdong ProvinceChina Department of Ophthalmology the Sixth Affiliated Hospital of Jinan UniversityDongguan 523576Guangdong ProvinceChina

●AIM:To assess effectivity and safety of trifocal intraocular lenses(IOLs)and capsular tension rings in treating cataract patients with axial high myopia.●METHODS:A prospective nonrandomized controlled clinical trial was *** 98 eyes(74 patients)who underwent femtosecond laser-assisted cataract surgery(FLACS)with trifocal IOLs were enrolled in the study and followed up for 2y after surgery:46 eyes(33 patients)with capsular tension ring implantation in the long axial lengths(AL)group(260.05).The dysfunctional lens index and total modulation transfer function(MTF)average height were similar between the two *** postoperative internal coma aberrations in the axial high myopia eyes were significantly higher than that in the normal AL group(P<0.05).The total satisfaction score in the long AL group(91.32±2.76)was slightly higher than that in the normal AL group(90.36±3.47),but there was no difference(P=0.136).A statistically negative correlation was found between corrected distance visual acuity(CDVA)and dysfunctional lens index(r=-0.382,P=0.009),and between CDVA and the total MTF average height(r=-0.374,P=0.01).But there was no significant correlation between CDVA and total satisfaction score(r=0.059,P=0.696).Postoperative complications mainly presented as posterior capsular opacity(PCO),retinal detachment and cystoid macular *** was no difference in the incidenc

关键词： trifocal intraocular lenses capsular tension ring axial high myopia cataract visual quality