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Characterizing the antibiotic resistance genes in a river catchment： Influence of anthropogenic activities

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Journal of Environmental Sciences 2018年第7期30卷 125-132页

作者： Haoyu Jiang Renjun Zhou Ying Yang Baowei Chen zhineng cheng Mengdi Zhang Jun Li Gan Zhang Shichun Zou School of Marine Sciences Sun Yat-Sen University Guangzhou 510006 China State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Graduate University of the Chinese Academy of Sciences Beijing 100039 China

Previous studies on environmental antibiotics resistance genes（ARGs） have focused on the pollution sources such as wastewater treatment plants, aquaculture and livestock farms,etc. Few of them had addressed this issue in a regional scale such as river catchment. Hence,the occurrence and abundances of 23 ARGs were investigated in surface water samples collected from 38 sites which located from the river source to estuary of the Beijiang *** them, 11 ARGs were frequently detected in this region and 5 ARGs（sul Ⅰ, sul Ⅱ, tet B,tet C, and tet W） were selected for their distribution pattern analysis. The abundances of the selected ARGs were higher in the upstream（8.70 × 10^6 copies/ng DNA） and downstream areas（3.17 × 10^6 copies/ng DNA） than those in the midstream areas（1.23 × 10^6 copies/ng DNA）, which was positively correlated to the population density and number of pollution sources. Pollution sources of ARGs along the Beijiang River not only had a great impact on the abundances and diversity, but also on the distribution of specific ARGs in the water samples. Both sul Ⅰ and sul Ⅱ were likely originated from aquaculture farms and animal farms,tet W gene was possibly associated with the mining/metal melting industry and the electric waste disposal and tet C gene was commonly found in the area with multiple pollution ***, the abundance of tet B was not particularly related to anthropogenic impacts. These findings highlight the influence of pollution sources and density of population on the distribution and dissemination of ARGs at a regional scale.

关键词： Antibiotic resistance genes Anthropogenic activities Pollution sources River catchment

法国男子乒乓球运动员费利克斯的技战术分析——以第57届世界乒乓球团体锦标赛为例

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体育科技文献通报 2024年第4期32卷 48-51页

作者：蒋智能陈颖刚湖南科技大学湖南湘潭411201 湖南铁道职业技术学院湖南株洲412001

本文运用文献资料法、录像观察法、数理统计法、四段指标分析法等研究方法,对法国男子乒乓球运动员费利克斯在第57届世界乒乓球团体锦标赛中9场比赛的技战术进行分析。结果表明,(1)费利克斯发抢段进攻速度快,第1板与第3板之间的衔接速度... 详细信息

本文运用文献资料法、录像观察法、数理统计法、四段指标分析法等研究方法,对法国男子乒乓球运动员费利克斯在第57届世界乒乓球团体锦标赛中9场比赛的技战术进行分析。结果表明,(1)费利克斯发抢段进攻速度快,第1板与第3板之间的衔接速度快,但发球旋转变化不足、发球抢攻套路单一;(2)接抢段,费利克斯的接发球质量高但没有过渡性技术,接发球站位能够保护全台但中间偏正手区域是其漏洞;(3)相持段,费利克斯正反手进攻实力强劲,但节奏变化差,步法移动较慢,防守能力差,与大多数传统优秀直拍运动技术特征形成鲜明的对比。建议:(1)发抢段,中国乒乓球运动员应该注重保护反手长球;积极主动上手,用旋转压制其速度;(2)接抢段,中国乒乓球运动员应重点以中性旋转的发球为主,提高出手速度,降低发球旋转;从中间偏正手区域突破,抑制其接发球进攻技术。(3)相持段,中国乒乓球运动员应重点在反手相持过程中主动变化节奏或通过高质量旋转来压制其反手速度;主动压制其中间位置,再结合两大角线路变化来压制其优势。

关键词：团体锦标赛乒乓球费利克斯技战术

PDCA循环结合SOP在洁净手术间物表周期性清洁中的应用效果

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国际护理学杂志 2019年第23期38卷 3841-3845页

作者：陈佛张静陈锐邓朝良程志能华中科技大学同济医学院附属武汉中心医院手术室武汉430014

目的探讨PDCA循环结合标准化操作流程在洁净手术间物表周期性清洁中应用效果,为手术间感染管理控制提供参考.方法应用PDCA循环对华中科技大学同济医学院附属武汉中心医院手术室2016年7~12月份完成的336次手术间物表周期性清洁情况进行分... 详细信息

目的探讨PDCA循环结合标准化操作流程在洁净手术间物表周期性清洁中应用效果,为手术间感染管理控制提供参考.方法应用PDCA循环对华中科技大学同济医学院附属武汉中心医院手术室2016年7~12月份完成的336次手术间物表周期性清洁情况进行分析,制定改进措施:制定《洁净手术间周期性物表清洁表》明确周期性清洁内容,并据此制定标准化操作流程手册及视频进行全科人员培训,责任到人.比较2017年1~6月实施干预措施后手术间周期性物表清洁完成情况.结果干预前物表荧光标记监测清除率为75.30%,周期清洁每手术间平均耗时(3.54±0.47)h,周期清洁人员房间比为57.14%,物表清洁平均缺陷率为37.80%,质控率27.38%.干预后,手术间物表荧光标记监测清除率提升到93.75%,周期清洁平均耗时下降为(2.21±0.95)h,周期清洁人员房间比28.57%,物表清洁缺陷率为3.2%,质控率7.8%,差异均有统计学意义(均P<0.05).结论PDCA循环结合标准化操作流程能够显著提高手术间物表周期性清洁合格率,降低物表清洁缺陷率,减少清洁耗时,降低人力成本,提高工作效率,增强了手术室感染控制质量.

关键词： PDCA 标准化操作流程手术室物表感染控制

Enhancing the electrochemical performance of Na metal anodes via local eutectic melting in porous Al-Cu alloy hosts

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Nano Research 2024年第7期17卷 6111-6118页

作者： Tao Hu Qiang Wu cheng Wang Jialu Chen Fu Su Zibo Chen Yizhou Wang Jianyu Chen Yanwen Ma Jin Zhao State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjing 210023China Materials Science and Engineering King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Suzhou Vocational Institute of Industrial Technology 1 Zhineng AvenueSuzhou International Education ParkSuzhou 215104China

Sodium(Na)metal batteries(SMBs)have emerged as promising alternatives to lithium metal batteries for large-scale energy storage applications,owing to their cost-effectiveness,abundance,and favorable redox ***,the practical implementation of SMBs faces several challenges associated with the Na metal anode,including the formation of dendrites,low Coulombic efficiency,and capacity ***,we propose a novel approach to enhance the electrochemical performance of Na metal anodes through a porous Al-Cu alloy host(PAC)fabricated by a local eutectic melting *** local eutectic melting facilitates the development of a conductive network,offering mechanical support,and the porous structure provides abundant channels for the diffusion of Na ions and accommodates volume fluctuations in the Na metal during charge–discharge ***,the PAC exhibits a high average Coulombic efficiency of 99.8%at 1 mA·cm^(−2)for 1 mAh·cm^(−2)and a low voltage polarization of 19 mV during 500 *** study provides valuable insight into the design and fabrication of highperformance Na metal anodes,which hold significant promise for the advancements of next-generation energy storage systems.

关键词： Na metal anode porous Al-Cu alloy porous current collector local eutectic melting

Molecular characterization of transformation and halogenation of natural organic matter during the UV/chlorine AOP using FT-ICR mass spectrometry

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Journal of Environmental Sciences 2021年第4期33卷 24-36页

作者： Xiaoxue Ruan Yingying Xiang Chii Shang Shuangshuang cheng Jingfu Liu zhineng Hao Xin Yang School of Environmental Science and Engineering Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation TechnologySun Yat-sen UniversityGuangzhou 510275China Department of Civil and Environmental Engineering The Hong Kong University of Science and TechnologyHong KongChina Hong Kong Branch of Chinese National Engineering Research Center for Control&Treatment of Heavy Metal Pollution The Hong Kong University of Science and TechnologyHong KongChina State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

UV/chlorine process,as an emerging advanced oxidation process(AOP),was effective for removing micro-pollutants via various reactive radicals,but it also led to the changes of natural organic matter(NOM)and formation of disinfection byproducts(DBPs).By using negative ion electrospray ionization coupled with Fourier transform ion cyclotron resonance mass spectrometry(ESI FT-ICR MS),the transformation of Suwannee River NOM(SRNOM)and the formation of chlorinated DBPs(Cl-DBPs)in the UV/chlorine AOP and subsequent post-chlorination were tracked and compared with dark *** comparison to dark chlorination,the involvement of Cl O·,Cl·,and HO·in the UV/chlorine AOP promoted the transformation of NOM by removing the compounds owning higher aromaticity(AI mod)value and DBE(double-bond equivalence)/C ratio and causing the decrease in the proportion of aromatic ***,more compounds which contained only C,H,O,N atoms(CHON)were observed after the UV/chlorine AOP compared with dark chlorination via photolysis of organic chloramines or radical reactions.A total of 833 compounds contained C,H,O,Cl atoms(CHOCl)were observed after the UV/chlorine AOP,higher than 789 CHOCl compounds in dark chlorination,and one-chlorine-containing components were the dominant *** different products from chlorine substitution reactions(SR)and addition reactions(AR)suggested that SR often occurred in the precursors owning higher H/C ratio and AR often occurred in the precursors owning higher ***-chlorination further caused the cleavages of NOM structures into small molecular weight compounds,removed CHON compounds and enhanced the formation of *** results provide information about NOM transformation and Cl-DBPs formation at molecular levels in the UV/chlorine AOP.

关键词： UV/chlorine AOP Disinfection byproducts(DBPs) Natural organic matter(NOM) FT-ICR MS Water treatment

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基于鲸鱼优化的疲劳驾驶识别方法研究

大连交通大学学报 2023年第5期44卷 23-28页

作者：李作进史蓝洋冯世霖陈智能曹亚男贺学乐陈生富重庆科技学院电气工程学院重庆400000

以实车工况下驾驶员操作行为为研究对象,设计双时间窗截取时间序列长度,给出驾驶操作行为统计特征提取方法。利用单因素方差分析疲劳特征的P值和F值,获取操作行为最优疲劳特征指标,提出基于鲸鱼优化的决策树方法,进行疲劳驾驶识别。实... 详细信息

以实车工况下驾驶员操作行为为研究对象,设计双时间窗截取时间序列长度,给出驾驶操作行为统计特征提取方法。利用单因素方差分析疲劳特征的P值和F值,获取操作行为最优疲劳特征指标,提出基于鲸鱼优化的决策树方法,进行疲劳驾驶识别。实车数据试验表明,所提出的三级疲劳驾驶检测正确率达84.25%,漏报率为15.69%。

关键词：交通安全疲劳驾驶操作行为鲸鱼优化

Introduction of Woody Landscape Plants in Linzhi City of Tibet

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Journal of Landscape Research 2016年第4期8卷 98-102,106页

作者： LIU zhineng XING Zhen YAO Xiazhen ZHOU Peng Department of Resources and Environment Tibet Agriculture and Animal Husbandry CollegeLinzhiTibet 860000China

To figure out current landscaping of Linzhi City, analyze the basic situation of local landscaping quantitatively, and solve related problems in landscaping, this paper applied the 'five-point sampling method' for the layered survey of landscape plant communities, investigated landscape plant species and their application in different regions of Tibet, particularly current landscaping, features and problems of Linzhi City, and put forward corresponding measures. The investigation covered 321 species(cultivars) of 196 genera, 87 families. The results showed that(1) Salix alba, Ligustrum × vicaryi, Poa pratensis had the highest importance value in the tree layer, shrub layer and herb layer, respectively, and the importance value was 68.620, 24.139 and 35.747, respectively.(2) Among all landscape plants in Linzhi City, the most applied families were Rosaceae(48), Salicaceae(21), Asteraceae(20), Leguminosae(20), Gramineae(19), Pinaceae(16), Cupressaceae(13) and Oleaceae(12), accounting for 14.95%, 6.54%, 6.23%, 6.23%, 5.92%, 4.98%, 4.05% and 3.73% of the total investigated species.(3) Natural environment of the plateau was the most influential restraint for local landscaping, and the application of landscape plants varied greatly among regions.(4) The local area was endowed with rich landscape plant resources, but these resources were not ful y developed.

关键词： Tibet Linzhi City Landscape plants Investigation Importance value

南水北调中线工程水体溶解性有机质分子组成特征

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人民长江 2023年第3期54卷 56-62页

作者：都诚王超郝智能岳前升张洪长江大学化学与环境工程学院湖北荆州434000 中国科学院生态环境研究中心环境水质学国家重点实验室北京100085 长江水资源保护科学研究所湖北武汉430051 中国科学院大学北京100049

为揭示南水北调中线工程水体中溶解性有机质(Dissolved Organic Matter,DOM)的组成变化特征,采集南水北调中线总干渠沿线及丹江口水库水样,利用傅里叶变换离子回旋共振质谱(Fourier Transform Ion Cyclotron Resonance Mass Spectrometr... 详细信息

为揭示南水北调中线工程水体中溶解性有机质(Dissolved Organic Matter,DOM)的组成变化特征,采集南水北调中线总干渠沿线及丹江口水库水样,利用傅里叶变换离子回旋共振质谱(Fourier Transform Ion Cyclotron Resonance Mass Spectrometry,FT-ICR MS)分析了DOM的分子组成及其空间变化,并探讨了总干渠沿线DOM变化成因和环境意义。结果表明:丹江口水库和总干渠均检出DOM物质3200余种,仅含C、H和O的物质(CHOs)为主要组分,约占所有检出物质的61%,含C、H、O和N的物质(CHONs)占30.5%~31.5%,含C、H、O和S的物质(CHOSs)仅占7.3%~8.4%,结合O/C和H/C分类,丹江口水库和总干渠水体DOM主要组分为木质素(60%以上)。相较于丹江口水库,总干渠水体DOM组分发生了较大变化,蛋白质类组分占比由3.70%升至8.65%,表明总干渠中有蛋白质生成;稠环类物质占比由9.43%下降至4.77%,单宁酸类的变化趋势与稠环类物质类似。总干渠局部区域藻类增殖过程是引起总干渠中CHONs和CHOSs类DOM组分和占比升高的主要原因。研究成果可为科学认识南水北调中线工程水体水质变化过程提供科学依据。

关键词：溶解性有机质超高分辨质谱跨流域调水南水北调中线工程

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气膜孔位置对突肩叶尖气膜冷却效率的影响

航空动力学报 2017年第8期32卷 1844-1852页

作者：成锋娜常海萍张镜洋田兴江杜治能南京航空航天大学能源与动力学院南京210016 南京航空航天大学航天学院南京210016 中国航空发动机集团有限公司沈阳发动机研究所沈阳110015

采用标准k-ε两方程模型求解雷诺平均Navier-Stokes方程组,研究了气膜孔位置对突肩叶尖间隙泄漏流场、气膜冷却效率和表面传热系数的影响,共模拟了3种气膜孔排布方式:中弧线气膜孔、吸力侧气膜孔、前缘气膜孔,考虑了间隙高度(t)和吹风比... 详细信息

采用标准k-ε两方程模型求解雷诺平均Navier-Stokes方程组,研究了气膜孔位置对突肩叶尖间隙泄漏流场、气膜冷却效率和表面传热系数的影响,共模拟了3种气膜孔排布方式:中弧线气膜孔、吸力侧气膜孔、前缘气膜孔,考虑了间隙高度(t)和吹风比(M)的影响。研究结果表明:在冷气流量相同的情况下气膜孔位置对突肩叶尖气膜冷却效率影响很大,中弧线气膜冷却突肩叶尖在中弧线到压力侧突肩区域有较好的气膜覆盖;吸力侧气膜冷却突肩叶尖在中弦处的吸力侧突肩到中弧线区域和尾缘区域有较好的气膜覆盖;前缘气膜孔突肩叶尖在整个叶尖表面都有较好的气膜覆盖。间隙高度对不同突肩叶尖的影响不同。吹风比增大时前缘气膜孔突肩叶尖的气膜冷却效率增幅远大于其余两种排布方式。

关键词：突肩叶尖气膜孔位置气膜冷效效率间隙高度吹风比