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Oral health status in Sichuan Province: findings from the oral health survey of Sichuan, 2015–2016

International Journal of Oral Science 2017年第1期9卷 10-15页

作者： Wei Yin Ying-ming Yang Hong Chen Xue Li Zhuo Wang Li Cheng Qiu-Dan Yin Hong-Zhi fang Wei Fei fang-lin mi min-Hai Nie Tao Hu Xue-Dong Zhou State Key Laboratory of Oral Diseases National Clinical Research Center for Oral DiseasesDepartment of Preventive DentistryWest China Hospital of StomatologySichtJan UniversityChengduChina Sichuan Center for Disease Control and Prevention ChengduChina The Third People's Hospital of Chengdu ChengduChina Sichuan Academy of Medical Sciences&Sichuan Provincial People's Hospital ChengduChina Department of Stomatolosy North Sichuan Medical CollegeFirst Affiliated HospitalNanchongChina Department of Stomatology Southwest Medical UniversityLuzhouChina and State Key Laboratory of Oral Diseases National Clinical Research Center for Oral DiseasesWest China Hospital of StomatolosySichuan UniversityChengduChina

To investigate oral health status in the residents of Sichuan Province, southwest China, a cross-sectional study was performed using the latest Oral Health Survey Basic Methods recommended by the World Health Organization. A multistage stratified random cluster-sampling method was used to enroll participants from the following three groups： children aged 3-5 years, adolescents aged 12 years, and people aged 65-74 years. In these three groups, the mean numbers of teeth that were affected by caries were 3.28, 0.86 and 5.13, respectively, resulting in a prevalence of 63.47%, 37.20% and 83.20%, respectively. Relative to the high rate of decayed teeth, the prevalence of fillings was very low in all age groups （0.97%, 7.24% and 5.43%, respectively）, In the 12-year-old adolescent group, only 3.61% had good pit and fissure sealing. In addition, the rate of dental fluorosis was 24.80%, and the Community Fluorosis Index value was 0.39. In the elder group, the community periodontal index was 2.92. The prevalence in the elderly of having lost at least one tooth was 75.54%. Additionally, 4.44% of these participants were edentulous. The incidence of dental prosthesis was 51.75%, the proportion with a removable partial denture, a fixed denture, full dentures, dental implants and an informal fixed bridge was 21.59%, 11.45%, 4.64%, 0 and 16.67%, respectively. In this study, 8.2% of the elderly participants were affected by different types of oral mucosal lesions. Among such lesions, recurrent aphthous ulcers were most prevalent （2.69%） and oral lichen planuses were second （1.6%）. The conclusion presented in this survey is that oral diseases, especially dental caries and periodontal disease, are frequent and common in Sichuan province, China. Moreover, the treatment rate is very low, and primary prevention and treatment options are therefore urgently needed in this population.

关键词： cross-sectional study dental caries oral health status periodontal condition Sichuan Province of China

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B2-CuZr reinforced amorphous alloy matrix composites:A review

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China Foundry 2025年第1期22卷 1-11页

作者： Wei Guo Run-hua Huang Zhen Zhang mi Zhao Jin-cheng Wang Yan-qiang Qiao Shu-lin Lü Shu-sen Wu State Key Lab of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China Research Institute of Huazhong University of Science and Technology in Shenzhen Shenzhen 518057GuangdongChina

B2-CuZr phase reinforced amorphous alloy matrix composites has become one of the research hotspots in the field of materials science due to the“transformation-induced plasticity”phenomenon,which makes the composites show better macroscopic plastic deformability and obvious work-hardening behavior compared to the conventional amorphous alloy matrix composites reinforced with ductile ***,the in-situ metastable B2-CuZr phase tends to undergo eutectoid decomposition during solidification,and the volume fraction,size,and distribution of B2-CuZr phase are difficult to control,which limits the development and application of these *** date,much efforts have been made to solve the above problems through composition optimization,casting parameter tailoring,and post-processing *** this study,a review was given based on relevant studies,focusing on the predictive approach,reinforcing mechanism,and microstructure tailoring methods of B2-CuZr phase reinforced amorphous alloy matrix *** research focus and future prospects were also given for the future development of the present composite system.

关键词： amorphous alloy matrix composite B2-CuZr phase plasticity microstructure tailoring

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Highly mass activity electrocatalysts with ultralow Pt loading on carbon black for hydrogen evolution reaction

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International Journal of minerals,Metallurgy and Materials 2025年第1期32卷 182-190页

作者： Shaorou Ke Yajing Zhao Xin min Yanghong Li Ruiyu mi Yangai Liu Xiaowen Wu minghao fang Zhaohui Huang Engineering Research Center of ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastersNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China

Pt-based nanocatalysts offer excellent prospects for various ***,the low loading of Pt with excellent performance for efficient and stable nanocatalysts still presents a considerable *** this study,nanocatalysts with ultralow Pt content,excellent performance,and carbon black as support were prepared through in-situ ***~2-nm particles uniformly and stably dispersed on carbon black because of the strong s-p-d orbital hybridizations between carbon black and Pt,which suppressed the agglomeration of Pt *** unique structure is beneficial for the hydrogen evolution *** catalysts exhibited remarkable catalytic activity for hydrogen evolution reaction,exhibiting a potential of 100 mV at 100 mA·cm^(-2),which is comparable to those of commercial Pt/C *** activity(1.61 A/mg)was four times that of a commercial Pt/C catalyst(0.37 A/mg).The ultralow Pt loading(6.84wt%)paves the way for the development of next-generation electrocatalysts.

关键词： hydrogen evolution reaction ultralow platinum in-situ synthesis ultrasound

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In-situ liquid-phase transmission electron microscopy for two-dimensional energy materials

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SCIENCE CHINA-CHEmiSTRY 2025年第2期68卷 414-429页

作者： Zhang, Junyu Xiao, Liangping Lu, mi Xiamen Univ Technol Sch Mat Sci & Engn Xiamen 361024 Peoples R China Huaqiao Univ Instrumental Anal Ctr Lab & Equipment Management Dept Xiamen 361021 Peoples R China Xiamen Univ Res Inst Biomimet & Soft Matter Jiujiang Res Inst Dept PhysFujian Prov Key Lab Soft Funct Mat Xiamen 361005 Peoples R China

Two-dimensional (2D) materials are vital for the development of advanced materials in the next-generation energy conversion and storage devices. In-situ liquid-phase transmission electron microscopy (LP-TEM) acts as a powerful tool for characterizing the dynamic evolution of materials under work condition in real time and in operando. Herein, this mini-review highlights the considerable advances in the utilization of in-situ LP-TEM for studying the physical and chemical process dynamics of 2D materials, such as their nucleation growth and phase transformation. The electrocatalytic water splitting reactions and CO2 electroreduction of 2D energy materials are highlighted. The underlying electrochemical reaction mechanisms of the 2D electrode materials in rechargeable batteries are discussed and summarized. Finally, the current challenges and perspectives for future research are proposed. This min-review aims to inspire and stimulate further innovation and encourage the broader adoption of LP-TEM in exploring the fascinating dynamics of 2D energy materials.

关键词： two-dimensional (2D) materials liquid-phase transmission electron microscopy electrochemical reaction electrode materials

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Ingenious construction of a magnetic-recyclable photo-Fenton catalyst ZnFe_(2)O_(4)@miL-88A(Fe)and its adsorption-degradation activity toward levofloxacin

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Journal of Environmental Sciences 2025年第5期151卷 677-691页

作者： Xichen mi Tingwei Wang Yitong Chen Dan Cao Na Ma Wei Dai Key Laboratory of the ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua 321004China Jinhua Customs Comprehensive Technology Service Center Jinhua 321004China College of Geography and Environmental Sciences Zhejiang Normal UniversityJinhua 321004China

Monotonic pore size and particles inseparability of metal-organic frameworks(MOFs)caused serious effects on its light absorption ability and charge separation,restricting its application for antibiotic such as levofloxacin(LEV)degradation in *** this study,a magnetically detachable nano-photocatalyst(ZnFe_(2)O_(4)@miL-88A(Fe))was synthesized using a simple two-step hydrothermal *** morphology and microstructure analyses showed that n-type ZnFe_(2)O_(4)catalyst particleswere efficiently assembled onto the surface of miL-88A(Fe)*** activity studies indicated that the ZnFe_(2)O_(4)@miL-88A(Fe)plus H_(2)O_(2)exhibiting a significantly boosted photo-Fenton activity toward LEV at visible light irradiation,compared to the pure ZnFe_(2)O_(4)and miL-88A(Fe),the degradation efficiency accordingly reached up to nearly 82%and 25%within 60 *** excellent photocatalytic performance was ascribed to the synergistic effects of the heterogeneous structure of ZnFe_(2)O_(4)and miL-88A(Fe),whereby the efficient separation of charge carriers in the catalytic system is mutually reinforced with the efficient reduction of Fe^(3+)and Fe^(2+).Meanwhile,the degradationmechanism and intermediates of LEV during the photo-Fenton reaction process were also studied in depth through free radical burst,electron paramagnetic resonance,and mass spectrometry analyses,***,the ZnFe_(2)O_(4)@miL-88A(Fe)composite catalyst displayed significant stability and ease of separation,indicating potential for the photooxidative degradation of organic pollutants.

关键词： ZnFe_(2)O_(4) miL-88A(Fe) Magnetism Photo-Fenton Levofloxacin

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含DG的交直流不平衡配电系统暂态电压稳定性分析

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电力自动化设备 2025年第1期45卷 33-41页

作者：徐艳春王霖张涛王凌云 mi Lu 三峡大学梯级水电站运行与控制湖北省重点实验室湖北宜昌443002 德克萨斯农工大学电气与计算机工程学院美国卡城77840

分布式电源(DG)以及大量恒功率直流负荷接入交直流配电系统使得母线暂态电压表现出正负极耦合且多波动的特性,现有暂态电压稳定性评估方法准确率低且适用性较差。推导分析了双极交直流配电系统直流侧线路、负荷参数不平衡时影响系统母... 详细信息

分布式电源(DG)以及大量恒功率直流负荷接入交直流配电系统使得母线暂态电压表现出正负极耦合且多波动的特性,现有暂态电压稳定性评估方法准确率低且适用性较差。推导分析了双极交直流配电系统直流侧线路、负荷参数不平衡时影响系统母线暂态电压稳定的因素。基于二元表判据思想,提出一种改进的自适应母线暂态电压稳定性评估指标。针对参数不平衡时含DG的双极交直流配电系统,引入稳定性保持因子,提出母线与系统的暂态电压稳定裕度计算方法。基于所提方法利用MATLAB/Simulink仿真平台在改进的IEEE 33节点与IEEE 69节点双极交直流配电系统中量化影响系统暂态电压稳定性的因素,并对比验证了所提指标的有效性和优越性。

关键词：暂态电压稳定性交直流系统不平衡配电系统直流故障分析

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Interfacial electron rearrangement of 3D Fe_(3)O_(4)/h-YFeO_(3)composites for efficient electromagnetic wave absorption

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International Journal of minerals,Metallurgy and Materials 2025年第3期32卷 609-618页

作者： Yi Sui Yingde Zhang Guang Liu Lei Ji Junyu Yue Chen Wu mi Yan School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China Key Laboratory of Rare Earths Chinese Academy of SciencesGanzhou 341119China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030032China

Interface modulation is an important pathway for highly efficient electromagnetic wave ***,tailored interfaces between Fe_(3)O_(4)particles and the hexagonal-YFeO_(3)(h-YFeO_(3))framework were constructed via facile *** resulting interfa-cial electron rearrangement at the heterojunction led to enhanced dielectric and magnetic loss *** results and density function theory(DFT)simulations demonstrate a transition in electrical properties from a half-metallic monophase to metallic Fe_(3)O_(4)/h-YFeO_(3)composites,emphasizing the advantages of the formed *** transformation of electron behavior is also accompan-ied by a redistribution of electrons at the Fe_(3)O_(4)/h-YFeO_(3)heterojunction,leading to the accumulation of localized electrons around the Y-O-Fe band bridge,consequently enhancing the polarization.A minimum reflection loss of-34.0 dB can be achieved at 12.0 GHz and 2.0 mm thickness with an effective bandwidth of 3.3 GHz due to the abundant interfaces,enhanced polarization,and rational ***,the synergistic effects endow the Fe_(3)O_(4)/h-YFeO_(3)composites with high performance and tunable functional properties for efficient electromagnetic absorption.

关键词： self-assembling heterojunction electron rearrangement interface modulation electromagnetic wave absorption

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Distribution and Hydrogeochemical Characteristic of High Iodine Groundwater in Oasis Zone in the Tarim Basin in Xinjiang,China

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Journal of Earth Science 2025年第1期36卷 173-183页

作者： Ying Sun Yinzhu Zhou Jinlong Zhou Yanyan Zeng Yuanyuan Ji mi Lei College of Hydraulic and Civil Engineering Xinjiang Agricultural UniversityUrumqi 830052China Xinjiang Hydrology and Water Resources Engineering Research Center Urumqi 830052China Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention Urumqi 830052China Center for Hydrogeology and Environmental Geology China Geological SurveyTianjin 300304China Xinjiang Agricultural Professional Technological College Changji 831100China

Groundwater is the main water supply source in the Tarim Basin in *** disease caused by high iodine(I)groundwater in the Tarim Basin was reported ***,it is crucial to systematically identify the distribution and genesis of groundwater *** on hydrochemical analysis of 717 groundwater samples collected in 2015–2018,spatial distribution and hydrogeochemistry characteristic of high I groundwater in different aquifers were *** showed that groundwater I ranged between100.00μg/L)accounted for 7.25%of the total ***,groundwater I significantly increased from recharge zone(RZ)to transition zone(TZ)and to evaporation zone(EZ).Vertically,groundwater in shallow confined aquifer(SCA)had the greatest I concentration,followed by single-structure phreatic aquifer(SSPA),phreatic aquifer in confined groundwater area(PACGA),while groundwater in deep confined aquifer(DCA)generally had low I *** I enrichment in SSPA was mainly affected by organic matter(OM)decomposition and that in SCA was mainly affected by evaporite mineral dissolution,OM decomposition under alkaline *** I enrichment in groundwater of PACGA was restrained under neutral *** sedimentary environment was crucial for I enrichment in ***,fine-grained lithology of aquifer,smooth topographic slope,shallow buried depth of groundwater,weak alkaline and reducing environment,reductive dissolution of iron oxide/hydroxide minerals and OM decomposition were advantageous to I enrichment in groundwater.

关键词： high iodine groundwater hydrogeochemical processes depositional environment hydrogeological condition Tarim Basin

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离子色谱法测定盐酸阿比朵尔中残留的二甲胺含量

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药物分析杂志 2016年第10期36卷 1852-1856页

作者：方琳美胡咪陈爱连徐雪萍施超欧华东理工大学分析测试中心上海200237

目的:利用离子色谱法建立盐酸阿比朵尔中残留二甲胺的含量测定方法。方法:采用阳离子交换柱[Dionex Ion Pac CG16(5 mm×50 mm)+C S16(5 mm×250 mm)],以30 mmol·L^(-1)甲基磺酸为淋洗液,流速1.0 m L·min^(-1),柱温30℃,电导检测器检... 详细信息

目的:利用离子色谱法建立盐酸阿比朵尔中残留二甲胺的含量测定方法。方法:采用阳离子交换柱[Dionex Ion Pac CG16(5 mm×50 mm)+C S16(5 mm×250 mm)],以30 mmol·L^(-1)甲基磺酸为淋洗液,流速1.0 m L·min^(-1),柱温30℃,电导检测器检测,抑制器为CSRS 300(4 mm)。结果:二甲胺质量浓度在0.031~4.0 mg·L^(-1)范围内线性关系良好(r=0.999 9),二甲胺对照品溶液(1 mg·L^(-1))连续6次进样,保留时间、峰高、峰面积的RSD都小于1.5%,本检测方法的检出限为0.001 mg·L^(-1),定量限为0.004 mg·L^(-1),样品的日内和日间RSD分别为1.7%和2.8%,3个水平的加标提取回收率在94.7%~105.0%之间,3个批次样品中残留二甲胺的含量分别为0.021 2%、0.023 1%、0.020 7%。结论:本方法经方法学验证,可有效监控盐酸阿比朵尔的质量。

关键词：抗病毒药盐酸阿比朵尔二甲胺残留杂质检测安全监测离子色谱

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基于汇流环瞬断问题的电接触副改进设计

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雷达与对抗 2020年第3期40卷 38-41页

作者：叶堃林方密戴烨刘励中国船舶集团有限公司第八研究院南京211153

汇流环是雷达系统电能和信号传递的关键设备。汇流环在工作过程中出现信号传输瞬断现象,严重影响雷达的性能。针对汇流环信号瞬断问题,介绍了汇流环电接触副的接触材料、接触形式和接触压力对汇流环导电性能的影响,提出了设计改进方法... 详细信息

汇流环是雷达系统电能和信号传递的关键设备。汇流环在工作过程中出现信号传输瞬断现象,严重影响雷达的性能。针对汇流环信号瞬断问题,介绍了汇流环电接触副的接触材料、接触形式和接触压力对汇流环导电性能的影响,提出了设计改进方法。经过各项试验及实际使用验证,改进后的汇流环信号传输质量得到有效提高。

关键词：雷达系统汇流环瞬断电接触副

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