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Proposal for valleytronic materials:Ferrovalley metal and valley gapless semiconductor

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Frontiers of physics 2024年第2期19卷 131-139页

作者： San-Dong Guo Yu-ling tao Guangzhao Wang Shaobo Chen Dong Huang Yee Sin Ang School of Electronic Engineering Xi’an University of Posts and TelecommunicationsXi’an 710121China Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing School of Electronic Information EngineeringYangtze Normal UniversityChongqing 408100China College of Electronic and Information Engineering Anshun UniversityAnshun 561000China Science Mathematics and Technology(SMT)Singapore University of Technology and Design(SUTD)8 Somapah RoadSingapore 487372Singapore

Valleytronic materials can provide new degrees of freedom to future electronic *** this work,the concepts of the ferrovalley metal(FVM)and valley gapless semiconductor(VGS)are proposed,which can be achieved in valleytronic bilayer systems by electric field *** valleytronic bilayer systems,the interaction between out-of-plane ferroelectricity and A-type antiferromagnetism can induce layer-polarized anomalous valley Hall(LP-AVH)*** K and−K valleys of FVM are both metallic,and electron and hole carriers simultaneously *** the extreme case,the FVM can become VGS by analogizing spin gapless semiconductor(SGS).Moreover,it is proposed that the valley splitting enhancement and valley polarization reversal can be achieved by electric field engineering in valleytronic bilayer *** the bilayer RuBr_(2)as an example,our proposal is confirmed by the first-principle *** FVM and VGS can be achieved in bilayer RuBr_(2)by applying electric *** appropriate electric field range,increasing electric field can enhance valley splitting,and the valley polarization can be reversed by flipping electric field *** effectively tune valley properties by electric field in bilayer systems,the parent monolayer should possess out-of-plane magnetization,and have large valley *** results shed light on the possible role of electric field in tuning valleytronic bilayer systems,and provide a way to design the ferrovalley-related material by electric field.

关键词： valleytronics electric field bilayer

Efficient removal of tetracycline hydrochloride through novel Fe/BiOBr/Bi_(2)WO_(6) photocatalyst prepared by dual-strategy under visible-light irradiation

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Journal of Environmental Sciences 2024年第4期138卷 46-61页

作者： Guanlong Yu Kai Yang Yi Yang Yifu Li Qifang Sun Peiyuan Li Wenming Wang Fengming Song tao ling Xuejun Peng Zhi Yu Shiquan Sun School of Hydraulic and Environmental Engineering Changsha University of Science&TechnologyChangsha 410114China Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province Changsha 410114China Hunan Pilot Yanghu Reclaimed Water Co. Ltd.Changsha 410208China China Railway Wuju Group the First Engineering Co. Ltd.Changsha 410117China

It is important to investigate whether combining two modification strategies has a synergistic effect on the activity of *** this manuscript,Fe-doped BiOBr/Bi_(2)WO_(6) heterojunctions were synthesized by a one-pot solvothermal method,and excellent photocatalytic performance was obtained for the degradation of tetracycline hydrochloride(TCH)in water without the addition of *** experiments and characterization,the synergistic effect between Fe ion doping and the BiOBr/Bi_(2)WO_(6) heterojunction was *** Fe/BiOBr/Bi_(2)WO_(6) composite photocatalyst had a beneficial void structure,enhanced visible light response,and could inhibit the recombination of photogenerated support well,which improved the photocatalytic *** presented experiments demonstrate that Fe/BiOBr/Bi_(2)WO_(6) removes 97% of TCH from aqueous solution,while pure BiOBr and Bi_(2)WO_(6) only remove 56% and 65% of TCH,***,the separation and transfer mechanisms of photoexcited carriers were determined in conjunction with the experimental *** study provides a new direction for the design of efficient photocatalysts through the use of a dual co-modification strategy.

关键词： BiOBr/Bi_(2)WO_(6) Fe-doping Dual strategy Tetracycline hydrochloride Photodegradation

Sleep quality in middle-aged and elderly hemodialysis patients:Impact of a structured nursing intervention program

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World Journal of Clinical Cases 2024年第25期12卷 5713-5719页

作者： ling-ling tao Cai-Hua Zeng Wen-Juan Mei Yan-Li Zou Blood Purification Room The First Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina

BACKGROUND Poor sleep quality is common among hemodialysis patients and can significantly impact their *** study aimed to evaluate the effectiveness of a structured nursing intervention program in improving sleep quality in middleaged and elderly hemodialysis *** To evaluate the impact of nursing intervention on sleep quality in hemodialysis *** This cross-sectional study was conducted in a tertiary hospital,the First Affiliated Hospital of Nanchang University,in *** study included 105 middle-aged and elderly hemodialysis patients aged≥45 years who underwent maintenance hemodialysis for at least 3 mo,utilizing the Pittsburgh Sleep Quality Index(PSQI)to identify poor *** identified underwent a 12-wk nursing intervention program focusing on education,relaxation techniques,and ***-intervention,sleep quality was reassessed using the *** The study found that 68.6%of hemodialysis patients were poor *** the 12-wk nursing intervention program,there was a significant decrease in the mean global PSQI score from 8.9±3.2 to 5.1±2.7(Pling effectively improved sleep quality among middle-aged and elderly hemodialysis *** significant decrease in the mean global PSQI score post-intervention indicates the positive impact of tailored nursing interventions in addressing poor sleep quality in this patient *** findings emphasize the importance of implementing targeted nursing interventions to enhance the quality of life for hemodialysis patients by addressing the prevalent issue of poor sleep quality.

关键词： Hemodialysis patients Nursing intervention Sleep quality Elderly Pittsburgh Sleep Quality Index Patient wellbeing

农业保险与农业生产韧性:内在逻辑及实证检验

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华南农业大学学报（社会科学版） 2024年第2期23卷 94-106页

作者：令涛赵桂芹上海财经大学金融学院上海200433

基于我国2007—2021年省级面板数据,通过构建指标体系测度各省份农业生产韧性水平,在时间和空间上进行演变分析,进一步从抵抗力、恢复力和变革力三个方面明确了农业保险提升农业生产韧性的内在逻辑,并进行实证检验。研究发现,样本期内... 详细信息

基于我国2007—2021年省级面板数据,通过构建指标体系测度各省份农业生产韧性水平,在时间和空间上进行演变分析,进一步从抵抗力、恢复力和变革力三个方面明确了农业保险提升农业生产韧性的内在逻辑,并进行实证检验。研究发现,样本期内各地区农业生产韧性水平均有一定程度的提升,但增长速度趋缓,整体上处于高韧性水平的地区较少,同时期粮食大省、经济强省的农业生产韧性水平一般高于其他省份;农业保险整体上可以显著提升农业生产韧性,且这一效应在一系列稳健性检验后依然成立;农业保险对农业生产恢复力和变革力的影响显著为正,对抵抗力影响不显著。异质性分析发现,在粮食主产省和高成灾率水平地区,这种提升效应更大且更为显著。

关键词：农业生产韧性农业风险管理农业保险

深化产教融合创新现代学徒制人才培养模式研究——以安徽省铜陵市为例

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宿州教育学院学报 2024年第3期27卷 46-51页

作者：凌涛铜陵职业技术学院安徽铜陵244061

以安徽省铜陵市为例,阐述了创新现代学徒制人才培养模式的必要性与可行性,分析了创新现代学徒制人才培养模式存在的问题,探讨了创新现代学徒制人才培养模式的路径策略,展望了创新现代学徒制人才培养模式的预期成效。这将有效推动校企合... 详细信息

以安徽省铜陵市为例,阐述了创新现代学徒制人才培养模式的必要性与可行性,分析了创新现代学徒制人才培养模式存在的问题,探讨了创新现代学徒制人才培养模式的路径策略,展望了创新现代学徒制人才培养模式的预期成效。这将有效推动校企合作人才培养工作,也将有效促进市域产教联合体的发展,为地方产业转型升级和创新发展培养更多的高级技能型人才。

关键词：产教融合现代学徒制铜陵市

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山东省系列标准地图编制与在线服务应用研究

山东国土资源 2024年第8期40卷 48-53页

作者：陶玲山东省地图院山东济南250014

标准地图是利用权威地理信息资料、依据区域界线标准画法编制而成的地图,在规范使用地图和减少“问题地图”发生方面起到积极作用,得到社会各界广泛应用。本文以山东省为例,提出了系列标准地图设计、编制、发布和在线应用等一体化技术方... 详细信息

标准地图是利用权威地理信息资料、依据区域界线标准画法编制而成的地图,在规范使用地图和减少“问题地图”发生方面起到积极作用,得到社会各界广泛应用。本文以山东省为例,提出了系列标准地图设计、编制、发布和在线应用等一体化技术方法,实现了多区域多主题版本多尺度标准地图产品免费浏览、下载和在线自助制图,可同时为社会各界提供标准地图产品级和定制化服务,建立了省域标准地图服务新模式,提高了省域标准地图的系统性、丰富性和服务便捷性和定制化。

关键词：标准地图多区域多版本多开本在线服务

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职业启蒙教育实践路径探索——以铜陵市中小学职业启蒙教育实践为例

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芜湖职业技术学院学报 2024年第2期26卷 89-92页

作者：凌涛铜陵职业技术学院安徽铜陵244000

中小学开展职业启蒙教育,对完善现代化基础教育和职业教育体系具有双重意义。目前,我国中小学职业启蒙教育的实践与研究尚处于初级阶段,各地教育水平不一、质量参差不齐。相较于全国领先地域,铜陵市中小学职业启蒙教育起步较早,但瓶颈... 详细信息

中小学开展职业启蒙教育,对完善现代化基础教育和职业教育体系具有双重意义。目前,我国中小学职业启蒙教育的实践与研究尚处于初级阶段,各地教育水平不一、质量参差不齐。相较于全国领先地域,铜陵市中小学职业启蒙教育起步较早,但瓶颈现象过早出现且比较明显,教育规模、成效和认可度均有待进一步提升。统筹推进以加强工作主体建设、宣传交流以提高工作认知度、专兼结合以提升师资队伍水平,分层递进以强化课程资源建设,多措并举以完善工作保障体系等对策,有利于实现学生全面发展。

关键词：铜陵市中小学职业启蒙教育师资队伍课程体系

Spin gap in quasi-one-dimensional S=3/2 antiferromagnet CoTi2O5

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Chinese Physics B 2024年第3期33卷 609-617页

作者：徐浩航刘庆元辛潮申沁鑫罗军周睿程金光刘健陶玲玲刘志国霍明学王先杰隋郁 School of Physics Harbin Institute of TechnologyHarbin 150001China School of Science Changchun University of Science and TechnologyChangchun 130022China Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China Laboratory for Space Environment and Physical Sciences Harbin Institute of TechnologyHarbin 150001China Southwest Institute of Applied Magnetics Mianyang 621000China

Quasi-one-dimensional(1D)antiferromagnets are known to display intriguing phenomena especially when there is a spin gap in their spin-excitation *** we demonstrate that a spin gap exists in the quasi-1D Heisenberg antiferromagnet CoTi2O5 with highly ordered Co2+/Ti4+occupation,in which the Co2+ions with S=3/2 form a 1D spin chain along the ***2O5 undergoes an antiferromagnetic transition at TN~24 K and exhibits obvious anisotropic magnetic susceptibility even in the paramagnetic *** a gapless magnetic ground state is usually expected in a quasi-1D Heisenberg antiferromagnet with half-integer spins,by analyzing the specific heat,the thermal conductivity,and the spin-lattice relaxation rate(1/T1)as a function of temperature,we found that a spin gap is opened in the spin-excitation spectrum of CoTi2O5 around TN,manifested by the rapid decrease of magnetic specific heat to zero,the double-peak characteristic in thermal conductivity,and the exponential decay of 1/T1 below *** the magnetic measurements and the first-principles calculations results indicate that there is spin-orbit coupling in CoTi2O5,which induces the magnetic anisotropy in CoTi2O5,and then opens the spin gap at low temperature.

关键词： quasi-one-dimensional antiferromagnet magnetic anisotropy spin gap

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长距离人工顶管施工安全控制技术研究

工程技术研究 2024年第9期9卷 180-182页

作者：刘钦凌涛中铁五局集团第一工程有限责任公司湖南长沙410117

传统人工顶管的施工工艺未考虑施工过程中气候的影响,特别是雨水丰沛区施工时,常出现降水量过大影响施工的情况,且管节吊装缺失特定的夹具,导致吊装转运不便、顶管时需要后背墙、工具管和顶镐机架等。文章结合益阳市金花湖路人工顶管施... 详细信息

传统人工顶管的施工工艺未考虑施工过程中气候的影响,特别是雨水丰沛区施工时,常出现降水量过大影响施工的情况,且管节吊装缺失特定的夹具,导致吊装转运不便、顶管时需要后背墙、工具管和顶镐机架等。文章结合益阳市金花湖路人工顶管施工现场,提出一种针对降雨丰沛区,减轻降雨影响的人工顶管施工方法,有效地保证了现场的施工安全。

关键词：长距离人工顶管施工降雨丰沛区夹具