检索结果-南通市图书馆

Can urban forests provide acoustic refuges for birds?Investigating the influence of vegetation structure and anthropogenic noise on bird sound diversity

引用

Journal of Forestry Research 2024年第2期35卷 163-175页

作者： Zezhou Hao chengyun zhang Le Li Bing Sun Shuixing Luo Juyang Liao Qingfei Wang Ruichen Wu Xinhui Xu Christopher A.Lepczyk Nancai Pei Research Institute of Tropical Forestry Chinese Academy of ForestryGuangzhou 510520People’s Republic of China School of Electronics and Communication Engineering Guangzhou UniversityGuangzhou 510006People’s Republic of China Hunan Botanical Barden Changsha 410116People’s Republic of China Guangdong Eco-Engineering Polytechnic Guangzhou 510520People’s Republic of China College of Forestry Wildlife and EnvironmentAuburn UniversityAuburnAL 36849USA

As a crucial component of terrestrial ecosystems,urban forests play a pivotal role in protecting urban biodiversity by providing suitable habitats for acoustic *** studies note that vegetation structure is a key factor influencing bird sounds in urban forests;hence,adjusting the frequency composition may be a strategy for birds to avoid anthropogenic noise to mask their ***,it is unknown whether the response mechanisms of bird vocalizations to vegetation structure remain consistent despite being impacted by anthropogenic *** was hypothesized that anthropogenic noise in urban forests occupies the low-frequency space of bird songs,leading to a possible reshaping of the acoustic niches of forests,and the vegetation structure of urban forests is the critical factor that shapes the acoustic space for bird *** acoustic monitoring in various urban forests was used to monitor natural and anthropogenic noises,and sounds were classified into three acoustic scenes(bird sounds,human sounds,and bird-human sounds)to determine interconnections between bird sounds,anthropogenic noise,and vegetation *** noise altered the acoustic niche of urban forests by intruding into the low-frequency space used by birds,and vegetation structures related to volume(trunk volume and branch volume)and density(number of branches and leaf area index)significantly impact the diversity of bird *** findings indicate that the response to low and high frequency signals to vegetation structure is *** clarifying this relationship,our results contribute to understanding of how vegetation structure influences bird sounds in urban forests impacted by anthropogenic noise.

关键词： Anthropogenic noise Bird sounds Urban forests Vegetation structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

人工甜味剂对人体的影响及国内外标准现状探讨

引用

食品科学 2024年第15期45卷 383-392页

作者：吴鹏张成云朱旭丽孙雅和周树华浙江省质量科学研究院金砖国家标准化(浙江)研究中心之江标准化智库国家市场监管数字化研究与应用技术创新中心浙江杭州310007 文成县食品药品综合检测中心浙江温州325399

近年来,随着全球肥胖率的显著上升,人们对人工甜味剂(artificial sweeteners,AS)等糖替代品的需求大幅上升,然而AS的安全性却始终存在争议。世界卫生组织和《自然》杂志的最新研究表明,长期摄入AS可能对身体健康产生负面影响。目前,各国... 详细信息

近年来,随着全球肥胖率的显著上升,人们对人工甜味剂(artificial sweeteners,AS)等糖替代品的需求大幅上升,然而AS的安全性却始终存在争议。世界卫生组织和《自然》杂志的最新研究表明,长期摄入AS可能对身体健康产生负面影响。目前,各国对AS的使用标准存在差异,且长期摄入AS对身体健康的影响机制也尚未明确。因此,本文基于近年来的科研成果,聚焦AS对人体健康的影响以及国内外的标准现状进行了综述。文章详细介绍了AS与肠道微生物、肥胖和糖尿病、脂类代谢、心血管疾病和癌症之间的关系,并基于这项研究总结了目前国际食品法典委员会、美国、欧盟、日本和中国有关AS的标准现状,从而深入探讨了食品行业如何确定AS添加标准这一关键问题,以期为该领域的科学研究提供参考和借鉴。

关键词：人工甜味剂人体健康标准现状

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

食源性致病菌快速检测技术及其标准化应用研究进展

引用

食品工业科技 2024年第5期45卷 426-437页

作者：吴鹏孙雅和朱旭丽周树华张成云浙江省标准化研究院金砖国家标准化(浙江)研究中心之江标准化智库国家市场监管数字化研究与应用技术创新中心浙江杭州310007 文成县食品药品综合检测中心浙江温州325399

随着新型食品安全检测技术的快速发展,食源性致病菌快速检测技术改善了传统检测方法周期长、灵敏度低等缺陷,对于保障民众生命健康和经济社会发展起到重要作用,而标准化则是推动快速检测技术应用推广的关键和前提。本文系统介绍了生理... 详细信息

随着新型食品安全检测技术的快速发展,食源性致病菌快速检测技术改善了传统检测方法周期长、灵敏度低等缺陷,对于保障民众生命健康和经济社会发展起到重要作用,而标准化则是推动快速检测技术应用推广的关键和前提。本文系统介绍了生理生化检测技术、免疫学检测技术、分子检测技术等目前使用较多的食源性致病菌快速检测方法,总结了各类不同方法的技术原理、研究进展及优缺点,并从标准化角度进一步介绍了国内外快速检测技术的标准现状以及应用实践情况。新型快速检测技术具备灵敏、快速、特异性强的优势,但也存在一定的缺陷,如免疫检测技术抗体前处理较为麻烦,生理生化检测技术有污染菌混淆问题,分子检测技术有一定假阳性等。此外,大部分检测方法仍属于非法定方法,缺乏统一的判定标准,国内外相关标准体系仍不完善,制约了快速检测技术的标准化推广应用。基于此,本文从标准化角度提出了食源性致病菌快速检测技术未来发展的建议,以期为后续食品安全相关技术的研究与标准化建设提供参考。

关键词：食源性致病菌快速检测技术标准化应用

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

疾病状态早产儿血清FT_(3)、FT_(4)、TSH水平变化及其与疾病转归的关系

引用

河南医学研究 2024年第12期33卷 2222-2226页

作者：陈鹏张冰张成云陈海燕郑州市第一人民医院检验科河南郑州450000

目的探讨疾病状态早产儿血清游离三碘甲状腺原氨酸(FT_(3))、游离甲状腺激素(FT_(4))、促甲状腺激素(TSH)水平变化及其与疾病转归的关系。方法选择2019年1月至2020年2月郑州市第一人民医院新生儿病房的258例疾病状态早产儿作为研究对... 详细信息

目的探讨疾病状态早产儿血清游离三碘甲状腺原氨酸(FT_(3))、游离甲状腺激素(FT_(4))、促甲状腺激素(TSH)水平变化及其与疾病转归的关系。方法选择2019年1月至2020年2月郑州市第一人民医院新生儿病房的258例疾病状态早产儿作为研究对象,纳入疾病组;另择同期收治的85例未合并疾病的早产儿纳入对照组。采用危重病例评分(NCIS)评估疾病组严重程度,于出生后T_(1)(7~10 d)、T_(2)(14~17 d)时间点测定血清FT_(3),FT_(4)、TSH水平,统计短暂性低甲状腺素血症(TH)及低T_(3)综合征比率,随访观察预后情况。结果疾病组T_(1)、T_(2)时间点FT_(3)、FT_(4)水平低于对照组,TSH高于对照组(P<0.05);疾病组新生儿TH、低T_(3)综合征比率高于对照组(P<0.05)。危重组新生儿出生后T_(1)、T_(2)时间点FT_(3)、FT_(4)水平低于非危重组(P<0.05)。危重组新生儿TH、低T_(3)综合征比率高于非危重组(P<0.05)。所有患病早产儿均进行预后随访及统计,预后不佳组新生儿出生后T_(1)、T_(2)时间点FT_(3)、FT_(4)低于预后良好组,新生儿TH、低T_(3)综合征比率高于预后良好组(P<0.05)。单因素及多因素分析示,胎龄、出生体重、出生1 min Apgar评分、出生5 min Apgar评分、严重程度、低T_(3)综合征及TH发生是预后不佳的独立危险因素(P<0.05)。结论疾病状态早产儿甲状腺素水平变化与疾病严重程度相关,TH及低T_(3)综合征可能与早产儿不良预后相关。

关键词：早产儿甲状腺激素低甲状腺素血症低T_(3)综合征预后

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

儿童友好导向的矿区地表致灾因素治理规划研究与探索:以硕嘉湾矿区为例

引用

中国矿业 2024年第7期33卷 99-107页

作者：陈柯 RUHIZAL Bin Roosli 赵国梁陈向阳张丞韫冯羽西安建筑科技大学华清学院陕西西安710043 马来西亚理科大学建筑学院槟城11800 机械工业勘察设计研究院有限公司陕西西安710043 西安科技大学陕西西安710054 南通职业大学建筑工程学院江苏南通226007

大规模的煤炭资源开发与利用引发了一系列生态环境问题。在生态文明建设的背景下,对矿区致灾因素及生态修复的综合治理规划提出了更高要求。因此,本文以神木市硕嘉湾矿区为例,通过可见光+热红外无人机航测探明了该区域地表致灾因素主要... 详细信息

大规模的煤炭资源开发与利用引发了一系列生态环境问题。在生态文明建设的背景下,对矿区致灾因素及生态修复的综合治理规划提出了更高要求。因此,本文以神木市硕嘉湾矿区为例,通过可见光+热红外无人机航测探明了该区域地表致灾因素主要为隐蔽高温异常、地表裂隙和塌陷、地表水体;在此基础上,以儿童友好作为治理目标导向,围绕治理规划的理论、原则、方针、实施、目标,系统提出“44441”(四理论指导、四原则推行、四方针落实、四步演进规划方案、一目标实现)儿童友好导向的治理规划策略,为矿区的治理规划提出了新兴概念设计,形成了致灾因素识别→前期生态修复→后期治理规划的全生命周期、全链条完整的矿区治理规划新路径,为提高矿区居民生活环境品质,以及矿区可持续发展提供了新思路。

关键词：矿区治理无人机航测致灾因素儿童友好导向生态修复

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

ICU谵妄的研究进展

引用

继续医学教育 2024年第4期38卷 192-196页

作者：张成云颜强耿荣星周龙梅战同霞潍坊市人民医院重症医学科山东潍坊261041

谵妄是危重症相关脑功能障碍中最常见的表现之一,它并非单一疾病,而是由多种原因引起的临床综合征,是认知功能障碍的一种类型。在ICU环境下,患者更容易发生谵妄,其发病率普遍高于其他科室。谵妄的发病机制复杂,临床表现亚型较多,由于缺... 详细信息

谵妄是危重症相关脑功能障碍中最常见的表现之一,它并非单一疾病,而是由多种原因引起的临床综合征,是认知功能障碍的一种类型。在ICU环境下,患者更容易发生谵妄,其发病率普遍高于其他科室。谵妄的发病机制复杂,临床表现亚型较多,由于缺乏统一的客观指标进行诊断,仅依赖评估工具进行诊断,难以深入研究。然而,谵妄患者面临更高的风险,可能导致不良预后,增加病死率和住院费用,并可能引发长期认知功能障碍,给患者及其家庭带来沉重负担。因此探讨危重病患者谵妄发生的原因、危险因素、发病机制及护理对早期预防危重病患者的谵妄,改善患者生活质量及预后意义重大。文章探讨了ICU患者谵妄的分型、危险因素、评估工具、预防措施等,旨在为预防ICU谵妄的发生提供理论依据。

关键词： ICU 谵妄评估工具危险因素预防措施研究进展

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cav3.2 channel regulates cerebral ischemia/reperfusion injury:a promising target for intervention

引用

Neural Regeneration Research 2024年第11期19卷 2480-2487页

作者： Feibiao Dai chengyun Hu Xue Li Zhetao zhang Hongtao Wang Wanjun Zhou Jiawu Wang Qingtian Geng Yongfei Dong Chaoliang Tang Graduate School Wannan Medical CollegeWuhuAnhui ProvinceChina Department of Anesthesiology The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Core Facility Center for Medical Sciences The First Affiliated Hospital of USTC(Anhui Provincial Hospital)HefeiAnhui ProvinceChina Department of Pharmacy The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Department of Neurosurgery The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina

Calcium influx into neurons triggers neuronal death during cerebral ischemia/reperfusion *** calcium channels are involved in cerebral ischemia/reperfusion ***3.2 channel is a main subtype of T-type calcium channels.T-type calcium channel blockers,such as pimozide and mibefradil,have been shown to prevent cerebral ischemia/reperfusion injury-induced brain ***,the role of Cav3.2 channels in cerebral ischemia/reperfusion injury remains ***,in vitro and in vivo models of cerebral ischemia/reperfusion injury were established using middle cerebral artery occlusion in mice and high glucose hypoxia/reoxygenation exposure in primary hippocampal *** results showed that Cav3.2 expression was significantly upregulated in injured hippocampal tissue and primary hippocampal *** further established a Cav3.2 gene-knockout mouse model of cerebral ischemia/reperfusion ***3.2 knockout markedly reduced infarct volume and brain water content,and alleviated neurological dysfunction after cerebral ischemia/reperfusion ***,Cav3.2 knockout attenuated cerebral ischemia/reperfusion injury-induced oxidative stress,inflammatory response,and neuronal *** the hippocampus of Cav3.2-knockout mice,calcineurin overexpression offset the beneficial effect of Cav3.2 knockout after cerebral ischemia/reperfusion *** findings suggest that the neuroprotective function of Cav3.2 knockout is mediated by calcineurin/nuclear factor of activated T cells 3 *** from this study suggest that Cav3.2 could be a promising target for treatment of cerebral ischemia/reperfusion injury.

关键词： calcineurin Cav3.2 channel cerebral ischemia/reperfusion hippocampus hypoxia/reoxygenation inflammatory response nuclear factor of activated T cells 3 oxidative stress primary hippocampal neurons stroke

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Self‐suspended rare‐earth doped up‐conversion luminescent waveguide:propagating and directional radiation

引用

Opto-Electronic Advances 2020年第6期3卷 1-7,I0001页

作者： Changjian zhang chengyun zhang Zhenglong zhang Tao He Xiaohu Mi Ting Kong Zhengkun Fu Hairong Zheng Hongxing Xu School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710062China School of Physics and Technology Wuhan UniversityWuhan 430072China

Near-infrared excited rare-earth(RE)-doped up-conversion(UC)-luminescent materials have attracted enormous attention because of their unique emission properties,such as narrow emission bands,long luminescence lifetimes,and multiple ***,current development of RE-doped luminescent material is hindered by weak and narrowband absorption problems and low photon-conversion quantum *** addition to conventional approaches to enhance fluorescence intensity,controlling emission directivity to improve detection efficiency has become a promising approach to obtain higher luminescence *** this paper,a self-suspended RE-doped UC luminescent waveguide is designed to realize directional *** from the special morphology of the crown-like NaYF4:Yb3+/Er3+microparticle,the points contact between the waveguide and substrate can be obtained to decrease energy *** attractive UC luminescent pattern accompanied by powerful and controllable directional emissions is observed,and the spatial emission angle and intensity distribution are explored and analyzed in detail by introducing Fourier imaging detection and *** work provides a new method for achieving controllable directional fluorescence emissions and obtaining improved detection efficiency by narrowing emission directivity,which has potential applications in 3-dimensional displays and micro-optoelectronic devices,especially when fabricating self-fluorescence micron lasers.

关键词： rare-earth-doped microcrystal up-conversion self-suspended Fourier imaging

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Incidence and Risk Factors of the Upper-Limb Musculoskeletal Disorders Among Occupational Groups in Key Industries—China,2018–2021

引用

China CDC weekly 2022年第50期4卷 1123-1130页

作者： Ning Jia Meibian zhang Huadong zhang Ruijie Ling Yimin Liu Gang Li Yan Yin Hua Shao Hengdong zhang Bing Qiu Dongxia Li Dayu Wang Qiang Zeng Rugang Wang Jianchao Chen Danying zhang Liangying Mei Xinglin Fang Yongquan Liu Jixiang Liu chengyun zhang Tianlai Li Jun Qi Qing Xu Ying Qu Xueyan zhang Xin Sun Zhongxu Wang National Institute of Occupational Health and Poison Control Chinese Center for Disease Control and PreventionBeijing MunicipalityChina Chongqing Center for Disease Control and Prevention Chongqing MunicipalityChina Hubei Provincial Hospital of Integrated Chinese&Western Medicine Wuhan CityHubei ProvinceChina Guangzhou Twelfth People’s Hospital Affiliated to Guangzhou Medical University Guangzhou CityGuangdong ProvinceChina Liaoning Provincial Health Service Center Shenyang CityLiaoning ProvinceChina Shanghai Center for Disease Control and Prevention Shanghai MunicipalityChina Shandong Academy of Occupational Health and Occupational Medicine Jinan CityShandong ProvinceChina Jiangsu Provincial Center for Disease Control and Prevention Nanjing CityJiangsu ProvinceChina Civil Aviation Medical Center Civil Aviation Administration of ChinaBeijing MunicipalityChina Guizhou Province Occupational Disease Prevention and Control Hospital Guiyang CityGuizhou ProvinceChina Tianjin Occupational Disease Prevention and Control Hospital Tianjin MunicipalityChina Tianjin Center for Disease Control and Prevention Tianjin MunicipalityChina Beijing Center for Disease Control and Prevention Beijing MunicipalityChina Fujian Province Occupational Disease and Chemical Poisoning Prevention and Control Center Fuzhou CityFujian ProvinceChina Guangdong Province Hospital for Occupational Disease Prevention and Treatment Guangzhou CityGuangdong ProvinceChina Hubei Provincial Center for Disease Control and Prevention Wuhan CityHubei ProvinceChina Zhejiang Provincial Center for Disease Control and Prevention Hangzhou CityZhejiang ProvinceChina Institute of Occupational Medicine of Jiangxi Nanchang CityJiangxi ProvinceChina Ningxia Hui Autonomous Region Center for Disease Control and Prevention Yinchuan CityNingxia ProvinceChina Sichuan Provincial Center for Disease Control and Prevention Chengdu CitySichuan ProvinceChina Shanxi Provincial Center for Disease Control and Prevention Xian CityShanxi ProvinceChin

What is already known about this topic?The burden of illness and economic losses due to upper-limb work-related musculoskeletal disorders(UL-WMSDs)is high;thus,they have become a major global public health *** present,the epidemiological characteristics of UL-WMSDs in China's occupational population are still *** is added by this report?The incidence of UL-WMSDs among key occupational groups in China is 22.5%,with distinct occupational *** are the implications for public health practice?This study has primarily determined the occurrence and potential risk factors of UL-WMSDs in key industries in China and provided data support for recommending prevention and control of the occurrence of such diseases in key industries in China,and in facilitating the addition into the China’s List of Legal Occupational Diseases.

关键词： Upper prevention skeletal

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Virtual reproduction of surround sound in frontal space using four loudspeakers

引用

Chinese Journal of Acoustics 2021年第2期40卷 155-174页

作者： XIE Bosun LIU Lulu zhang chengyun Acoustic Lab School of Physics and OptoeletronicsSouth China University of TechnologyGuangzhou 510641 State Key Laboratory of Subtropical Building Science South China University of TechnologyGuangzhou 510641 School of Mechanical and Electrical Engineering Guangzhou UniversityGuangzhou 510006

By considering the contribution of dynamic cue to auditory vertical localization,a method for virtual reproduction of surround sound in frontal space using four actual loudspeakers is *** four actual loudspeakers are arranged in the left-front and right-front directions in the horizontal plane,as well as left-front-up,right-front-up directions in a higher elevation plane,*** signal processing is used to convert the multichannel sound signals to the signals for the four actual *** reproduction of 9.1 channel sound is taken as an *** analysis of binaural pressures and corresponding localization cues using head-related transfer functions indicates that the current method is able to recreate correct interaural time difference and its dynamic variation with head turning,and thus able to create appropriate binaural cue for lateral localization and dynamic cue for vertical *** of psychoacoustic experiment indicate that the current method is able to recreate stable horizontal and vertical virtual source within the frontal-hemispherical ***,combined with transaural processing,the four loudspeakers arrangement is enough to reproduce the vertical localization information in frontal space and realize the down-mixing and simplification of multichannel spatial surround sound.

关键词： sound directions arrangement

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：