期刊文献+
共找到2,268篇文章
< 1 2 114 >
每页显示 20 50 100
Water, Sanitation and Hygiene in Lower-Level Health Care Facilities of Dar es Salaam Region in Tanzania: Status towards Achieving the Sustainable Development Goals and Way Forward
1
作者 Mariam Mahamudu Hussein Mohamed +8 位作者 Michael Habtu Dennis Rweyemamu Anyitike Mwakitalima Amour Seleman Erick Mgina Khalid Massa Grace Saguti Andre Arsene Bita Fouda Zabulon Yoti 《Advances in Infectious Diseases》 CAS 2024年第1期279-295,共17页
Background: Improving Water, Sanitation and Hygiene in health care settings is a critical prerequisite for achieving national health goals and Sustainable Development Goals (SDGs). The World Health Organization (WHO) ... Background: Improving Water, Sanitation and Hygiene in health care settings is a critical prerequisite for achieving national health goals and Sustainable Development Goals (SDGs). The World Health Organization (WHO) has set a target for each United Nations member state to reach by 2030. Each member state is required to reach by 2022, 2025 and 2030 at least 60%, 80% and 100%, respectively of basic level of service of the five elements which are water, sanitation, hygiene, waste management and environmental cleaning. Methods: This study aimed to evaluate and document the current state of basic water, sanitation, and hygiene services in all lower-level health care facilities in the Dar es Salaam region of Tanzania as of July 2022. A cross-sectional study was conducted in 99 public dispensaries in the Dar es Salaam region’s five councils: Ubungo, Kigamboni, Kinondoni and Temeke Municipalities, and Ilala City. The interviewee form and observational checklists were both digitalized using the Kobo tool software. The respondents were health care facility in-charges or nurse in-charges. Data were downloaded, validated, and imported to Stata version 15 for analysis. Results: The basic WASH level per JMP is far below the target in 2022. Each member state by 2022 is required to reach at least 60% of the basic level of service of each element. We found a low coverage of basic WASH in the 99 dispensaries included in this study. The basic WASH coverage was met in only 10 (10.1%) of the dispensaries, while the remaining 89 (89.9%) dispensaries fall on limited WASH services. Conclusion: This study revealed lower coverage of basic WASH services in dispensaries. An urgent need is required to improve the status of WASH in all the dispensaries and facilitate the provision of quality health care services, patient safety and reduce health care associated infections. 展开更多
关键词 Dispensaries Low level Health Care Facilities Service levels basic WASH Dar es Salaam
下载PDF
Research on the Construction Status of the Beijing-Tianjin-Hebei Medical Talent Community and the Countermeasures for Its Realization
2
作者 Chao Jing Jiaqi Zhang 《Proceedings of Business and Economic Studies》 2024年第1期89-93,共5页
In April 2015,the Political Bureau of the CPC Central Committee adopted the“Outline of the Plan for the Coordinated Development of Beijing,Tianjin,and Hebei.”In July 2017,the“Plan for the Integrated Development of ... In April 2015,the Political Bureau of the CPC Central Committee adopted the“Outline of the Plan for the Coordinated Development of Beijing,Tianjin,and Hebei.”In July 2017,the“Plan for the Integrated Development of Beijing,Tianjin,and Hebei Talents(2017–2030),”jointly prepared by the leading groups of the three regions,was officially released.The core of the coordinated development of these three regions is the orderly removal of non-capital functions from Beijing.Talents,especially medical talents,are integral to this transition.The construction of a medical talent community across these three regions promotes the further development of a healthier China,meets the growing needs of the people for a better life,and embodies the concept of putting people first.This paper begins by examining the current situation of the construction of the Beijing-Tianjin-Hebei medical talent community,reviewing the progress made,analyzing existing problems,and proposing targeted countermeasures and suggestions. 展开更多
关键词 community of medical talents Top level design the party in charge of talents Polarization effect
下载PDF
Prediction of the joint impacts of sea level rise and land development on distribution patterns of mangrove communities
3
作者 Shanshan Liang Wenjia Hu +6 位作者 Peiqiang Wu Jianbu Wang Shangke Su Guangcheng Chen Jianguo Du Wenhua Liu Bin Chen 《Forest Ecosystems》 SCIE CSCD 2023年第2期176-186,共11页
Mangrove distribution along shorelines shows distinct zonation patterns;thus,different communities may face various influences from sea level rise(SLR)and land use.However,long-term change predictions are usually base... Mangrove distribution along shorelines shows distinct zonation patterns;thus,different communities may face various influences from sea level rise(SLR)and land use.However,long-term change predictions are usually based only on the total extent of mangroves.Few studies have revealed how SLR and land development such as agriculture,aquaculture,and urbanization jointly affect different intertidal mangrove communities.This study proposed a novel framework combining SLAMM(Sea Level Affecting Marshes Model)and the CLUE-S(Conversion of Land Use and its Effect at Small regional extent)model to assess the potential impacts on upper and lower intertidal mangrove communities.Maoweihai in Guangxi,China,was selected as the study area and the potential impacts from the squeeze effect and mangrove expansion potential were evaluated.We established three scenarios combining SLR and land use patterns to predict mangrove coverage projections by 2070.The results showed that,under a single SLR driver,the upper intertidal mangroves would be more adaptive to rapid SLR than the lower intertidal mangroves.However,under the combined influence of the two drivers,the upper intertidal mangroves would experience larger squeeze effects than the lower intertidal mangroves,with up to 80.5%of suitable habitat lost.Moreover,the expansion potential of upper intertidal mangroves would be considerably more limited than that of lower intertidal mangroves.The length of the expandable habitat patch boundary of upper intertidal mangroves only reached 1.4–1.8 km,while that of the lower intertidal mangroves reached up to99.2–111.2 km.Further,we found that aquaculture ponds and cropland are the top two land development types that could occupy suitable habitat and restrict the mangrove expansion potential.Our results highlight that timely improvement of land use policies to create available landward accommodation space for mangrove migration is essential to maintain the coverage and diversity of mangrove communities under SLR.The proposed method can be a helpful tool for adaptive mangrove conservation and management under climate change. 展开更多
关键词 Coastal development Climate change Mangrove communities Mangrove adaption Land use Sea level rise
下载PDF
Paleocommunity Replacements of Benthic Brachiopod in the Middle-Upper Devonian in the Longmenshan Area,Southwestern China:Responses to Sea Level Fluctuations 被引量:1
4
作者 CHENYuanren LIXianghui 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2005年第3期313-324,共12页
Twelve paleocommunities dominated by benthic brachiopod are recognized in the Givetian-Frasnian stages of the Devonian in the Longmenshan area, southwestern China, in which two kinds of brachiopod community replacemen... Twelve paleocommunities dominated by benthic brachiopod are recognized in the Givetian-Frasnian stages of the Devonian in the Longmenshan area, southwestern China, in which two kinds of brachiopod community replacement are classified. One is the abrupt replacement, represented by abrupt alternation between the Leiorhynchus community and Zhonghuacoelia-Striatopugnax community in the Frasnian Tuqiaozi Formation. The other is the gradual one, developed in the Givetian Guanwushan Formation, which had been completed by the shift of the Independatrypa lemma-Uncinulus heterocostellis-Emanuella takwanensis community via the Sinospongophyllum irregulare-Pseudomicroplasma fongi community to the Clathrocoilona spissa-Hexagonaria composite reef community. According to analyses of the paleocommunities, either the abrupt or gradual paleocommunity replacement of the Middle-Upper Devonian in the Longmenshan area is suggested as a response to the 5th-order sea level fluctuation due to the replacements of the paleocommunities in a tracts-system of depositional sequence. It is supposed that changes of paleocommunity diversity, one of the results of paleocommunity replacement, are depended on the range and magnitude of sea level fluctuation, but there is not a linear relationship between them. Furthermore, a suggestion is proposed that the concept of paleocommunity succession seem to be abandoned in the paleocommunity analysis because it almost never be practiced to recover the information of community succession in the geological record at present. 展开更多
关键词 community replacement BRACHIOPOD benthic paleocommunity sea level fluctuation Middle Devonian Upper Deovnian LONGMENSHAN Sichuan
下载PDF
Correlation between the avian community and habitat at different water levels during spring migration in Zhalong National Nature Reserve,China
5
作者 ZOU Hong-fei SUN Meng +1 位作者 WU Qing-Ming MA Jian-Zhang 《Journal of Forestry Research》 CAS CSCD 2012年第4期661-666,共6页
Zhalong National Nature Reserve (Zhalong) is an important stopover for migratory birds. In recent decades, Zhalong has become the focus of researchers and public discussion in relation to irrigation. We studied rela... Zhalong National Nature Reserve (Zhalong) is an important stopover for migratory birds. In recent decades, Zhalong has become the focus of researchers and public discussion in relation to irrigation. We studied relationships between birds and habitats at different water levels to guide development of more effective habitat management measures. We used line transects to survey bird numbers and distribution during April-May from 2005-2009 at Zhalong, and used cluster analysis and Chi-Square tests to analyze data. We recorded 139 bird species of 39 families and 13 orders during spring migration, including Anseriformes, Charadriiformes, Ciconiiformes, Columbiformes, Coraciiformes, Cucu- liformes, Falconiformes, Galliformes, Gruiformes, Passeriformes, Pici- formes, Podicipediformes, Strigiformes. Dominant vegetation and geo- graphic region were the main influence factors of avian distribution. Different ecological groups preferred different water levels (p〈0.01) and different habitat types (p〈0.01). Grallatores, Natatores and Passeres were the main ecological groups in different wetland habitats, and reed marsh and lake are the main habitats for management. Grallatores preferred reed marsh and lake with water levels 〉30 cm and 5-15 cm. Natatores preferred lakes with deep water (〉30 cm). Passeres preferred open forest and reed marsh with no surface water. Different avian ecological groups occupied specific habitats depending on water level and we recorded some overlaps in bird distribution. 展开更多
关键词 avian community ecological group spring migrationseason water level Zhalong reserve
下载PDF
Decadal variations in the community status of economically important invertebrates in the Bohai Sea 被引量:3
6
作者 Qiang Wu Lisha Guan +2 位作者 Zhongyi Li Xiujuan Shan Xianshi Jin 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2019年第10期60-66,共7页
With the decline of fish stocks,the proportions of economically important invertebrates like crustaceans and cephalopods have increased in the Bohai Sea.The community structure and trophic level of economically import... With the decline of fish stocks,the proportions of economically important invertebrates like crustaceans and cephalopods have increased in the Bohai Sea.The community structure and trophic level of economically important invertebrates were analyzed using the bottom trawl survey data collected by the Yellow Sea Fisheries Research Institute in the Bohai Sea in May and August of 1958–1959,1982,1992–1993,2004,2009 and 2015.A total of 37 species of economically important invertebrates,belonging to 5 orders,24 families,were captured.The biomass densities of economically important invertebrates in the Bohai Sea displayed an overall downward trend from 1982 to 2015.Oratosquilla oratoria and Loligo spp.were the most dominant species in the past 30 years,the biomass proportion of O.oratoria increased gradually in both May and August from 1982 to 2015.Moreover,biodiversity indices of economically important invertebrates in the Bohai Sea appeared to decline from 1982 to 2004 and then increased in 2015.Similarly,the mean trophic level of economically important invertebrates declined from 1982 to 2004 and increased slightly in 2015.Overall,although the proportions of invertebrates have increased,the biomass densities in the Bohai Sea have displayed an overall downward trend from 1982 to 2015.The increases in the biodiversity and trophic level of economically important invertebrates after the 2000s,possibly benefit from stock enhancement projects implemented by governments at different levels and national fishery management measures such as the“double-control”of the total number and engine power of fishing vessels and summer moratorium of fishing. 展开更多
关键词 DECADAL VARIatIONS community structure TROPHIC level economically important invertebrates BohaiSea
下载PDF
Ideas for the realization of China's overall national basic pension of workers
7
作者 LI Jieqiong 《International English Education Research》 2016年第4期33-35,共3页
At present, the overall low level of pensions, chaotic management, regardless of the central and local powers, capital depreciation of greater risk. Plus various regions of pension imbalances, leading to a pension "e... At present, the overall low level of pensions, chaotic management, regardless of the central and local powers, capital depreciation of greater risk. Plus various regions of pension imbalances, leading to a pension "empty accounts" has become increasingly prominent. Therefore, to achieve the basic pension national urban, it is an effective measure to deal with these problems. Manpower is a systematic project, implementation may face difficulties. Therefore, the need to coordinate all aspects of the relationship, select the appropriate time to reform, optimize the overall path, and improve related measures is to ensure the smooth implementation of integrated basis. 展开更多
关键词 basic pension Provincial level National urban
下载PDF
Effect of nutrient level on phytoplankton community structure in different water bodies 被引量:27
8
作者 Wei Zhu Lei Wan Lianfang Zhao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2010年第1期32-39,共8页
Increasing levels of pollution within water bodies can cause eutrophication and an associated rapid growth in and reproduction of phytoplankton. Although most frequently occurring in bodies of water such as lakes and ... Increasing levels of pollution within water bodies can cause eutrophication and an associated rapid growth in and reproduction of phytoplankton. Although most frequently occurring in bodies of water such as lakes and dams, in recent years an increasing number of river systems in China have suffered serious algal blooms. The community structure of phytoplankton may differ, however, dependent on the hydrodynamic conditions and nutrient levels within the water body. The field investigation results obtained from a stagnant river in Suzhou City and Taihu Lake, China, showed that in water with higher concentrations of nitrogen and phosphorus, Chlorophyta became the predominant species and in water with lower concentrations of nitrogen and phosphorus, Cyanobacteria became the predominant species. Growth experiments with competitive species, Microcystis aeruginosa Kutz and Scenedesmus quadricauda (Turp.), were conducted at three different nutrient levels. The biomass of algae in pure and mixed cultures was measured under conditions of different N/P ratios at oligotrophic, eutrophic and hypertrophic nutrient levels. The results indicated that the most suitable state for the growth and reproduction of M. aeruginosa and S. quadricauda were eutrophic conditions in both pure and mixed cultures. Under competition, however, the lower medium nutrient levels favoured M. aeruginosa, while the higher medium nutrient levels better suited S. quadricauda. Under similar hydrodynamic conditions, the community structure of phytoplankton in the water body was determined by the dominant species in competition for nutrients. 展开更多
关键词 PHYTOPLANKTON community structure nutrients level N/P ratio
下载PDF
Effects of single-tree selection harvesting on hymenopteran and saproxylic insect assemblages in the canopy and understory of northern temperate forests 被引量:2
9
作者 Sandy M. Smith Nurul Islam M. Isabel Bellocq 《Journal of Forestry Research》 SCIE CAS CSCD 2012年第2期275-284,共10页
Insects respond to changes in microhabitat caused by canopy disturbance, and thus can be used to examine the ecological impacts of harvesting. Single-tree selection harvesting is the most common silvicultural system u... Insects respond to changes in microhabitat caused by canopy disturbance, and thus can be used to examine the ecological impacts of harvesting. Single-tree selection harvesting is the most common silvicultural system used to emulate local small-scale natural disturbance and maintain uneven-aged forest structure in temperate forests. Here, we test for differences in richness, abundance, and composition of hymenopteran and saproxylic insect assemblages at four different taxon levels (selected insect orders; and all hymenopteran families, and braconid subfamilies and morphospecies) between the canopy and understory of unharvested and single-tree selection harvested sites in a northern temperate forest from central Canada. Harvesting had no effect on insect assemblage richness, composition or abundance at the three highest taxon levels (order, family and subfamily). Similarly, richness and abundance at the lowest-taxon level (braconid morphospecies) were similar, although composition differed slightly between unharvested and harvested stands. Insect assemblages were vertically stratified, with generally higher abundance (for Diptera, Hymenoptera, some hymenopteran families and braconid subfamilies) and richness (for braconid morphospecies) in the understory than the canopy. In particular, composition of the braconid morphospecies assemblage showed relatively low similarity between the understory and canopy. Single-tree selection harvesting appears to influence wood-associated insect taxa only subtly through small changes in community composition at the lowest taxon level, and thus is recommended as a conservative approach for managing these northern temperate forests. 展开更多
关键词 selection harvesting insect communities canopy insects Jack pine forests forest management high-taxon level insect conserva-tion
下载PDF
A Comparative Study of the Microbial Communities Between the Mineral Surface and the Bioleaching Solution Using the Microarray Method 被引量:1
10
作者 GAO Jian KANG Jian 《生命科学研究》 CAS CSCD 2011年第5期390-395,共6页
In order to explore the bioleaching mechanism and improve the bioleaching efficiency,the micro-bial community in the bioleaching solution was compared with that on the surface of minerals based on the microarray analy... In order to explore the bioleaching mechanism and improve the bioleaching efficiency,the micro-bial community in the bioleaching solution was compared with that on the surface of minerals based on the microarray analysis.Meanwhile,the elements composition in the bioleaching solution was analyzed using the ICP-AES method.Results showed that there was a high concentration of S and Cu in the leaching solution which up to 2 380 mg/L and 1 378 mg/L,respectively,after continuously bioleaching of copper-ore concen-trate for 30 days by a mixed culture associated with 12 species of bioleaching microorganisms.Based on the data of microarray,the total of cell number in the surface of minerals was far higher than that in the bi-oleaching solution.Furthermore,the dominant communities on the surface of minerals,such as Acidithiobacillus ferrooxidans,Acidithiobacillus thiooxidans and Acidithiobacillus caldus,were similar to that in the bioleaching solution.However,the relative level of some bacteria,such as Sulfobacillus aci-dophilus and Sulfobacillus thermosulfidooxidans,showed great discrepancy with lower presence in the bi-oleaching solution with respect to the mineral surface. 展开更多
关键词 MICROARRAY ICP-AES BIOLEACHING dominant communities relative level
下载PDF
Annual pattern of zooplankton communities and their environmental response in a subtropical maritime channel system in the northern Bay of Bengal, Bangladesh 被引量:1
11
作者 ABDULLAH Al Mamun ALAM Md.Didarul +5 位作者 AKHTAR Aysha XU Henglong ISLAM Md.Shafiqul MUSTAFA KAMAL Abu Hena UDDIN M Muslem ALAM Md.Wahidul 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2018年第8期65-73,共9页
Zooplankton plays an important role in aquatic food webs by fluxing of energy from primary producer to subsequent trophic levels in the food chain. The annual pattern of zooplankton communities and potential environme... Zooplankton plays an important role in aquatic food webs by fluxing of energy from primary producer to subsequent trophic levels in the food chain. The annual pattern of zooplankton communities and potential environmental drivers were studied in the Kohelia channel, Bangladesh from summer 2014 to spring 2015.Samples were collected using net at a depth of 1 m. A total of 32 species belonged to 18 orders, 27 families and 15 taxonomic groups were identified. Of these species, 22 distributed in all four seasons of which 8 were dominant and highly contributing to the total communities. Species number peaked in summer next to winter and fall in spring while maximum abundance was in summer and minimum in spring. Multivariate analyses showed that there was a clear annual pattern in the zooplankton communities. Species diversity and evenness peaked in spring but fall in autumn while the high value of species richness was found in winter. Biological-environmental best matching(BIO-ENV) analyses conformed that community pattern of zooplankton was mainly driven by transparency salinity, and temperature individually or combined with water nutrients. These results demonstrate that annual pattern of the zooplankton community shaped by channel environmental factors in subtropical channel ecosystems, thus might be used for community-based subtropical coastal water bioassessment. 展开更多
关键词 ZOOPLANKTON trophic levels subtropical channel community structure multivariate approach
下载PDF
Effects of age and sex on clinical high-risk for psychosis in the community 被引量:1
12
作者 Frauke Schultze-Lutter Benno G Schimmelmann +1 位作者 Rahel Fluckiger Chantal Michel 《World Journal of Psychiatry》 SCIE 2020年第5期101-124,共24页
BACKGROUND Recent reports of both heightened prevalence rates and limited clinical relevance of clinical high-risk(CHR)criteria and their relevant symptoms in children and adolescents indicate an important role of neu... BACKGROUND Recent reports of both heightened prevalence rates and limited clinical relevance of clinical high-risk(CHR)criteria and their relevant symptoms in children and adolescents indicate an important role of neurodevelopment in the early detection of psychoses.Furthermore,sex effects in CHR symptoms have been reported,though studies were inconclusive.As sex also impacts on neurodevelopment,we expected that sex might have an additional contribution to age in the prevalence and clinical relevance of CHR symptoms and criteria.AIM To investigate age and sex effects on CHR criteria and symptoms and their association with psychosocial impairment and mental disorder.METHODS In this cross-sectional cohort study,n=29168-to 40-year-olds,randomly drawn from the population register of the Swiss canton Bern,were assessed in semistructured interviews by phone or face-to-face for CHR symptoms and criteria using the Structured Interview for Psychosis-Risk Syndromes and the Schizophrenia Proneness Instrument in its child and youth,and adult version,respectively.Furthermore,social and occupational functioning and DSM-IV axis I disorders were assessed.Simple and interaction effects of age and sex on CHR symptoms and criteria,and interaction effects of age,sex,and CHR symptoms and criteria on presentation of functional impairment and of non-psychotic disorder were investigated using logistic regression analyses.RESULTS Altogether,542(18.6%)participants reported any CHR symptom;of these,261(9.0%)participants reported any one of the 11 criteria relevant cognitive and perceptual basic symptoms,and 381(13.1%)any one of the five attenuated or transient psychotic symptoms(attenuated psychotic symptoms/brief intermittent psychotic symptoms).Fewer participants met any one of the CHR criteria(n=82,2.8%)or any one of the three recently recommended CHR criteria(n=38,1.3%).Both age and sex were significantly(P<0.05)associated with CHR symptoms and criteria,mostly by younger age and female sex.Though slightly differing between symptom groups,age thresholds were detected around the turn from adolescence to adulthood;they were highest for cognitive basic symptoms and CHR criteria.With the exception of the infrequent speech disorganization attenuated psychotic symptom,the interaction of age with CHR symptoms and criteria predicted functional impairment;whereas,independent of each other,sex and CHR symptoms mostly predicted mental disorders.CONCLUSION Age and sex differentially impact on CHR symptoms and criteria;these differences may support better understanding of causal pathways.Thus,future CHR studies should consider effects of sex and age. 展开更多
关键词 PSYCHOSIS Clinical high-risk attenuated psychotic symptoms basic symptoms community Age SEX Interview assessment Prevalence
下载PDF
Responses of acrocarpous moss communities to heavy metal(Fe,Mn,Cd)and sulfur pollution in the Changgou carbonate manganese ore,SW China
13
作者 HAN Jin-hua ZHANG Zhao-hui WANG Zhi-hui 《Journal of Mountain Science》 SCIE CSCD 2022年第5期1292-1306,共15页
Bryophyte communities have been widely used to monitor and assess heavy metal pollution in soil,air and water.However,the unique value of acrocarpous moss in monitoring environmental pollution and the harm of non-meta... Bryophyte communities have been widely used to monitor and assess heavy metal pollution in soil,air and water.However,the unique value of acrocarpous moss in monitoring environmental pollution and the harm of non-metallic sulfur to human health caused by carbonate manganese mining were seldom considered in previous studies.This study investigated the heavy metal and sulfur pollution level by soil and moss sample collection in Changgou manganese ore and its surrounding environment in the Zunyi area,Guizhou Province,China.By means of cluster analysis,diversity analysis,correlation analysis and redundancy analysis,the relationship between dominant moss communities and major pollutants were analyzed.The results showed that there were pollutants such as iron(Fe),manganese(Mn),cadmium(Cd),sulfur(S)and others in the 500 meters buffer zone centered on Changgou manganese ore.The ore sorting area and waste rock accumulation area were considered as the most seriously polluted,followed by the ore outlet area and ore transport line,at last the miners’living area and vegetable planting area were the least polluted.A total of 23 species of moss communities were identified in the Changgou manganese ore area,among which 9 were dominant,including Bryum blindii Bruch&Schimp.(Bry.bli),Weissia planifolia Dix(Wei.pla)-Bry.bli,Bryum caespiticium Hedw.(Bry.cae),Bryum pallescens Schleicher ex Schw?gr.(Bry.pal),Didymodon longicostatus X.J.Li et Iwats(Did.lon),Weissia brachycarpa(Nees&Hornsch.)Jur.(Wei.bra),Trichostomum brachydontium Bruch.(Tri.bra),Bryum argenteum Hedw.(Bry.arg)Wei.bra and Bryum algovicum Sendt.ex M?ll.Hal.(Bry.alg),all of which are from the acrocarp species.Bry.cae showed a strong tolerance to S,Did.lon to Fe,Bry.pal to Cd and Bry.bli to Mn.There was a significant correlation between the main polluting elements and the dominant bryophyte community(P<0.05),indicating a high biological indicator value.Together,our results can provide the scientific basis for soil pollution monitoring and human health risk assessment in carbonate manganese mining areas. 展开更多
关键词 Bryophyte community Biological indicator Heavy metal(loids) Pollution level
下载PDF
Effect of the Type of Vitis vinifera Cultivation in the Cenophenoresistome and Metabolic Profiling (CLPP) of Edaphic Bacterial Communities
14
作者 Marina Robas Mora Pedro Antonio Jimenez Gomez +1 位作者 Carolina Valbuena Agustin Probanza 《Journal of Agricultural Science and Technology(A)》 2017年第8期522-536,共15页
In the present work, bacterial soil communities of different grapevine exploitation samples are studied in order to elucidate the possible influence of different agrarian management techniques (use of fertilizers, ir... In the present work, bacterial soil communities of different grapevine exploitation samples are studied in order to elucidate the possible influence of different agrarian management techniques (use of fertilizers, irrigation with river water) may have on the rhizospheric microbiome of Vitis vinifera plants. Therefore, it is postulated the Cenophenoresistome as a novel methodology to evaluate complex communities' global resistance against different antibiotics, by using and adjusting a serial of techniques traditionally applied to evaluate a monospecific population's resistance against antibiotics (Vitek, ATB and disk diffusion methods). Likewise, the metabolic profile (CLPP: comunity level physiological profile) of bacterial communities is studied by Biolog ECO. In relation to the functional structure of the bacterial communities, it is observed that the metabolic profile (diversity, kinetics and CLPP) of unexploited soils differs from soils under anthropic influence. It is discussed the causes of resistance in the human clinic antibiotic treatment based on the agrarian management, especially with the contamination transmitted by irrigation water, which could be associated with changes in edaphic communities. The results obtained in the present study through two different approaches (Cenophenoresistome and metabolic profiles) are consistent with each other, suggesting that both methods can be good bioindicators of the state of humankind-altered soils that host natural ecosystems. Likewise, the concept of Cenophenoresistome is proposed as a bioindicator of soil response to alteration processes, as well as a possible predictor of its evolution in edaphic remediation processes. 展开更多
关键词 Bacterial communities antibiotic resistance Cenophenoresistome Vitis vinifera comunity level physiological profile Biolog ECO.
下载PDF
面向订单装配系统(ATO)两阶段随机库存优化研究
15
作者 靖可 刘宇 李乐华 《东北大学学报(自然科学版)》 EI CAS CSCD 北大核心 2024年第6期905-912,共8页
基于零部件的基本库存水平补货策略,在多周期订单产品需求不确定情况下构建两阶段随机优化模型:第一阶段在需求未知情况下,规划不同零部件基本库存水平决策变量,实现系统收益最大化;第二阶段针对订单交货期约束创新性设计订单指派决策变... 基于零部件的基本库存水平补货策略,在多周期订单产品需求不确定情况下构建两阶段随机优化模型:第一阶段在需求未知情况下,规划不同零部件基本库存水平决策变量,实现系统收益最大化;第二阶段针对订单交货期约束创新性设计订单指派决策变量,考虑在不确定需求收益和订单延期惩罚情况下,最大化订单期望收益.通过采样获取不同需求场景,并将不确定需求转成期望需求,针对该期望需求下的单阶段确定性模型求解,并与随机模型结果进行对比.数值实验表明,随机模型的优化结果远差于确定性模型,即未知信息具有一定的价值;同时通过对模型中参数的灵敏度分析,得到了实际中提升系统收益的策略. 展开更多
关键词 基本库存水平 两阶段随机优化 订单装配系统 不确定需求 订单指派
下载PDF
A Study on Senior English Vocabulary Teaching Based on Prototype Category Theory
16
作者 杨安妮 《海外英语》 2021年第5期262-264,共3页
The emphasis is laid on expanding students’vocabulary in the new English Curriculum Standards.Without effective approaches to vocabulary learning,students can hardly form vocabulary networks in mind.Combining with mo... The emphasis is laid on expanding students’vocabulary in the new English Curriculum Standards.Without effective approaches to vocabulary learning,students can hardly form vocabulary networks in mind.Combining with modern educational technology,the author carries out experimental teaching to explore the effectiveness of vocabulary teaching based on prototype category theory and presents some samples of vocabulary teaching.The study shows that these teaching methods can effectively enhance students’cognition abilities,stimulate association,promote vocabulary processing,form a categorized network schema,and finally improve students’lexical competence and long-term memory. 展开更多
关键词 prototype category theory vocabulary teaching prototypical meaning prototype effect basic level
下载PDF
Measuring Capacity for Resilience among Coastal Counties of the U. S. Northern Gulf of Mexico Region 被引量:2
17
作者 Margaret A. Reams Nina S. N. Lam Ariele Baker 《American Journal of Climate Change》 2012年第4期194-204,共11页
Many have voiced concern about the long-term survival of coastal communities in the face of increasingly intense storms and sea level rise. In this study we select indicators of key theoretical concepts from the socia... Many have voiced concern about the long-term survival of coastal communities in the face of increasingly intense storms and sea level rise. In this study we select indicators of key theoretical concepts from the social-ecological resilience literature, aggregate those indicators into a resilience-capacity index, and calculate an index score for each of the 52 coastal counties of Louisiana, Texas, Mississippi, Alabama and Florida. Building upon Cutter’s Social Vulnerability Index work [1], we use Factor Analysis to combine 43 variables measuring demographics, social capital, economic re- sources, local government actions, and environmental conditions within the counties. Then, we map the counties’ scores to show the spatial distribution of resilience capacities. The counties identified as having the highest resilience capaci- ties include the suburban areas near New Orleans, Louisiana and Tampa, Florida, and the growing beach-tourist com- munities of Alabama and central Florida. Also, we examine whether those counties more active in oil and gas develop- ment and production, part of the region’s “energy coast”, have greater capacity for resilience than other counties in the region. Correlation analyses between the resilience-capacity index scores and two measures of oil and gas industry ac- tivity (total employment and number of business establishments within five industry categories) yielded no statistically significant associations. By aggregating a range of important contextual variables into a single index, the study demonstrates a useful approach for the more systematic examination and comparison of exposure, vulnerability and capacity for resilience among coastal communities. 展开更多
关键词 community RESILIENCE VULNERABILITY SEA level RISE COASTAL Hazards Hurricanes Oil and Gas Industry
下载PDF
Noise Exposure Levels in Basic School Environments in a City in Ghana 被引量:1
18
作者 Lois N. K. Quartey Samuel Amos-Abanyie Samuel O. Afram 《Open Journal of Civil Engineering》 2021年第1期81-95,共15页
Basic schools that are located in heavily populated residential and commercial areas in Ghana are exposed to environmental noise that can have detrimental effects on the academic attainments of children. Limited studi... Basic schools that are located in heavily populated residential and commercial areas in Ghana are exposed to environmental noise that can have detrimental effects on the academic attainments of children. Limited studies have been conducted on noise level in basic schools to date in Ghana. The objective of the study was to assess noise levels in and around learning spaces in basic schools in Ghana with </span></span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">a </span></span></span></span></span><span><span><span><span><span style="font-family:""><span style="font-family:Verdana;">focus on Kumasi.</span><i> </i><span style="font-family:Verdana;">A survey employing the use of interviews and an empirical monitoring of noise levels in and around learning spaces in four selected basic schools were adopted. The study revealed that mean outdoor and indoor noise levels exceed the World Health Organisation permissible limits by 30 - 40 percent and 90 - 107 percent respectively for schools in the commercial zones and schools that are located near highways. The school that is sited in an educational environment with a setback from the highway attained mean noise levels ranging from 1.2 percent below to 3.7 percent above the permissible limits for outdoor and between 64 - 105 percent for indoor. The outcome of the study is expected to engender the design of environmental noise resilient buildings to facilitate teaching and learning in basic schools in Ghana</span></span></span></span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">. 展开更多
关键词 Environmental Noise Sound level basic Schools Central Business District Kumasi
下载PDF
Study on the Effects of Infant Fostering Interventions in Xuhui District,Shanghai
19
作者 Jie YANG Li- feng ZHOU +7 位作者 Xiao-qin LIU Ning LIU Rui-zhu CHEN Zhi-xin RONG Juan-ping HE Chen-ping XU Xiao-ping ZHOU Er-sheng GAO 《Journal of Reproduction and Contraception》 CAS 2006年第3期201-208,共8页
Objective To assess the effects of fostering interventions on the infants and their families through the community. Methods A total of 309 infants born on 1st August, 2003 to 30th August, 2004 and their families were ... Objective To assess the effects of fostering interventions on the infants and their families through the community. Methods A total of 309 infants born on 1st August, 2003 to 30th August, 2004 and their families were recruited as participants by cluster sampling in Longhua and Kantian sub-districts of Xuhui district, Shanghai. The newborns were randomly assigned to intervention group (156 cases) and control group (153 cases). The infants and their families will be followed up during 3-year interventions. Results After 6 months' intervention, the proportion of infants who could turn over the body in the intervention group (88.46%) was higher than that in control group (75.16%). The morbidity of upper-respiratory tract infection in intervention group (20.51%) was significantly lower than that in control group (32.68%). The incidence rates of pneumonia, diarrhea and anemia in intervention group were all lower than that in control group, except for pneumonia, the differences were not significant. Both of the knowledge about how to foster infants and service utility in intervention group were higher than that in control group. Conclusion The fostering interventions through the community promote the prevention and control of infants disease, increase the knowledge level and service util ity of families. 展开更多
关键词 INFANTS community intervention disease prevention and control knowledge level service utility
下载PDF
Epidemiologic surve of blood lipid level among 1401 residents aged≥60 years in rong-gui community
20
作者 ZHOU Yue-ying,LV Lan-zhu,CHEN Jing-hua (The Guizhou Hospital of Shunde District,Fushan 528000, China) 《岭南心血管病杂志》 2011年第S1期175-176,共2页
Objectives To investigate prevalence of blood lipid level among 1401 residents aged≥60 years in rong-gui community.Methods 1401 ones(579 males,822 females, (68.12±6.64)years Of total 1503 residents aged≥60 year... Objectives To investigate prevalence of blood lipid level among 1401 residents aged≥60 years in rong-gui community.Methods 1401 ones(579 males,822 females, (68.12±6.64)years Of total 1503 residents aged≥60 years in the 2 villages which were randomly exampled in rong-gui community were investigated.867 ones aged among 60-69 years(61.9%),430 ones aged among 70-79 years (30.7%),104 ones aged≥60 years(7.4%).Investigative items included age,sex,total cholesterol(TC),triglyceride (TG),body height,body weight,waist circumference(WC), hip circumference(HC),fasting plasma glucose(FG),blood pressure,history of past illness,body mass index(BMI), waist hip ratio(WHR),waist height ratio(WHtR).Results (l)Of total 1401 residents,Prevalence of hyperlipemia were 42.8%,female were signifleanfly higher than male(P【0.01), The difference among three age groups were not significant, the combined prevalence of hyperlipemia and borderline hyperlipemia was 80.1%.(2)The FG、BMI、SBP、DBP、WC、WHR、WHtR of residents with hyperlipemia were higher than ones with normal blood lipid level(P【0.01).(3)By Pearson correlation analysis,we found that hyperlipemia was obviously correlated with FG,BMI,WC,WHR,WHtR, SBP,DBP.Conclusions(1)Prevalence of hyperlipemia were 42.8%,female were signifleanfly higher than male.(2) hyperlipemia were obviously correlated with higher FG、BMI、WC、WHR、WHtR、SBP、DBP. 展开更多
关键词 WHR Epidemiologic surve of blood lipid level among 1401 residents aged years in rong-gui community
下载PDF
上一页 1 2 114 下一页 到第
使用帮助 返回顶部