检索结果-南通市图书馆

BioCluster:Tool for Identification and Clustering of Enterobacteriaceae Based on Biochem.cal Data

在线全文

学校读者我要写书评

暂无评论

Genom.cs, Proteom.cs & Bioinform.tics 2015年第3期13卷 192-199页

作者： Ahm.d Abdullah S.m.Sabbir Alam.m.nawar Sultana m.Anwar hossain Departm.nt of m.crobiology University of Dhaka

Presum.tive identifcation of different Enterobaeteriaeeae species is routinely achieved based on biochem.cal properties. Traditional practice includes m.nual com.arison of each biochem. ical property of the unknown sam.le with known reference sam.les and inference of its identity based on the m.xim.m.sim.larity pattern with the known sam.les. This process is labor- intensive, tim.-consum.ng, error-prone, and subjective. Therefore, autom.tion of sorting and sim. ilarity in calculation would be advantageous. Here we present a m.TLAB-based graphical user interface （GUI） tool nam.d BioCluster. This tool was designed for autom.ted clustering and iden- tification of Enterobacteriaceae based on biochem.cal test results. In this tool, we used two types of algorithm., i.e., traditional hierarchical clustering （HC） and the Im.roved Hierarchical Clustering （IHC）, a m.dified algorithm.that was developed specifically for the clustering and identification of within this species. IHC takes into account the variability in result of 1-47 biochem.cal tests fam.ly. This tool also provides different options to optim.ze the clus- tering in a user-friendly way. Using com.uter-generated synthetic data and som. real data, we have dem.nstrated that BioCluster has high accuracy in clustering and identifying enterobacterial species based on biochem.cal test data. This tool can be freely downloaded at http：//***/ biocluster/.

关键词： Bacterial identification Enterobacteriaceae Biochem.cal properties Clustering tool Identification tool Hierarchy algorithm

Gas chrom.tography-m.ss spectrom.try analysis of various organic extracts of m.rrem.a.borneensis from.Sabah

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical m.dicine 2011年第8期4卷 637-641页

作者： m.Am.ad hossain m.ham.ad Dawood Shah m.hyar Sakari Biotechnology Research Institute Universiti Malaysia SabahLocked Bag No.207388400 KotakinabaluSabahMalaysia School of Science and Technology Universiti Malaysia SabahLocked Bag No.207388400 KotakinabaluSabahMalaysia

Objective:To analyse the chem.cal com.osition of different extracts of m.rrem.a.borneensis(m. borneensis) by gas chrom.tography-m.ss spectrom.try(GC-m.).m.thods:The dried leaves powder was extracted with m.thanol at room.tem.erature by using Soxhlet *** crude extracts of *** were extrastel with hexane,chloroform.ethyl acetate and butanol. Results:Qualitative analyses of various organic crude extracts showed that m.jority of these are flavonoids,terpeniods,alkaloids and *** of the identified com.ounds by GCm. are biologically *** the *** leaf possesses certain characteristics that can be ascribed to cultivation on a dom.stic ***:The suitable extracts for respective com.ounds can be chosen on the basis of above GC-m. *** the m.jor com.ounds from.different extracts are biologically active *** the identification of a good num.er of com.ounds from.various extracts *** m.ght have som. ecological significance.

关键词： m.rrem.a borneensis Organic extracts Qualilalive analysis GC-m.

Allelopathic effects of m.kania cordata on forest and agricultural crops in Bangladesh

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Forestry Research 2016年第1期27卷 155-159页

作者： m.K.hossain S.Anwar R.Nandi Institute of Forestry and Environm.ntal Sciences University of Chittagong

m.kania cordata, an invasive weed is becom. ing a problem.in the secondary degraded forests and plantations of Bangladesh, not only com.eting with but also releasing allelochem.cals to cultivated crops. Allelo- pathic effects of the leaves of m. cordata were investigated through an experim.nt in the green house of the Institute of Forestry and Environm.ntal Sciences, University of Chit- tagong, Bangladesh. Five econom.cally im.ortant agricul- tural crops （Oryza sativa L., Triticum.aestivum.L., Vigna sinensis L., Abelm.schus esculentus L. and Am.ranthus tricolor L.） and three forest crops （Acacia auriculiform.s A. Cunn. ex Benth. ＆ Hook, Albizia procera （Roxb.） Benth., and Paraserianthes falcataria （L.） Nielson） were used as bioassay species. Experim.nts were conducted on trays at an average room.tem.erature 27 ~C. The effects of dif- ferent concentrations of leaf extracts were com.ared to controls. Water soluble allelochem.cals of m. cordata inhibited the germ.nation and initial growth of the tested agricultural and forest crops. Germ.nation percent of forest crops declined with increasing concentration of extracts. The inhibitory effect on root elongation of forest crops was pronounced, whereas a stim.latory effect was found on P. falcataria up to a concentration of 25 %. Abelm.schus esculentus showed poor germ.nation （%） and low shoot developm.nt （0.5 cm. and no developm.nt of taproot or lateral roots at treatm.nt of 100 % concentration. Theinhibitory effect was proportional to the concentrations of the extracts with higher concentrations producing stronger inhibitory effects. Lower concentrations showed som. stim.latory effect. The inhibitory effect was pronounced in root and lateral root developm.nt rather than germ.nation or shoot developm.nt of the crops. m.kania cordata should be eradicated for healthy growth and developm.nt of the forest and adjacent agricultural crops.

关键词： m.kania cordata Allelopathy Agriculturalcrops Forest crops Germ.nation Growth inhibition

Bulk density of m.neral and organic soils in the Canada’s arctic and sub-arctic

在线全文

学校读者我要写书评

暂无评论

Inform.tion Processing in Agriculture 2015年第3期2卷 183-190页

作者： m.F.hossain W.Chen Yu Zhang Am.rican International University-Bangladesh Kemal Ataturk AvenueH 58/BR 21BananiDhaka 1213Bangladesh Canada Center for m.pping and Earth Observation Natural Resources Canada560 Rochester StreetOttawaON K1S 4M2Canada

Bulk density is an indicator of soil com.action subject to anthropogenic im.act,essential to the interpretation of any nutrient budgets,especially to perform.carbon *** is so expensive to m.asure bulk density in arctic/sub-arctic and there are relatively very few field m.asurem.nts are ***,to establish a bulk density and SOC em.irical relationship in Canada’s arctic and sub-arctic ecosystem.,com.iled all the bulk density and SOC m.asurem.nts that are available in Northern *** addition an attem.t has been m.de for bulk density and SOC field m.asurem.nt in Yellowknife and Lupin,to develop an em.irical relationship for Canada’s arctic and *** between bulk density(BD)and soil organic carbon(SOC)for m.neral soil and organic soils(0–100 cm.depth)were described by exponential *** best fit m.del,predictive bulk density(BDp),for m.neral soil,(BDp=0.701+0.952 exp(0.29 SOC),n=702,R2=0.99);for organic soil(BDp=0.074+2.632 exp(0.076 SOC),n=674,R2=0.93).Different soil horizons have different bulk densities and m.y require different predictive equations,therefore,developed predictive best fit exponential equation for both m.neral and organic soils together(BDp=0.071+1.322 exp(0.071 SOC),n=1376,R2=0.984),where X is a dum.y variable with a value of 0 for surface peat(0–25 cm.depth)and 1 for subsurface peat(25–175 cm..We recom.end using the soil organic carbon density approach to estim.te BD from.SOC because it allows BD to be predicted without significant bias.

关键词： Bulk density m.neral and organic soils Canada’s arctic and sub-arctic

Uncertainty assessm.nt of a polygon database of soil organic carbon for greenhouse gas reporting in Canada’s Arctic and sub-arctic

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Inform.tion Processing in Agriculture 2014年第1期1卷 34-41页

作者： m.F.hossain Yu Zhang W.Chen Am.rican International University-Bangladesh Kamal Ataturk AvenueBananiDhaka 1213Bangladesh Canada Center for m.pping and Earth Observation Natural Resources Canada560 Rochester StreetOttawaON K1S 4M2Canada

Canada’s Arctic and sub-arctic consist 46%of Canada’s landm.ss and contain 45%of the total soil organic carbon(SOC).Pronounced clim.te warm.ng and increasing hum.n disturbances could induce the release of this SOC to the atm.sphere as greenhouse *** is com.itted to estim.ting and reporting the greenhouse gases em.ssions and rem.vals induced by land use change in the Arctic and *** assess the uncertainty of the estim.te,we com.iled a site-m.asured SOC database for Canada’s north,and used it to com.are with a polygon database,that will be used for estim.ting SOC for the UNFCCC *** 10 polygons where 3 or m.re m.asured sites were well located in each polygon,the site-averaged SOC content agreed with the polygon data within±33%for the top 30 cm.and within±50%for the top 1 m.*** we directly com.ared the SOC of the 382 m.asured sites with the polygon m.an SOC,there was poor agreem.nt:The relative error was less than 50%at 40%of the sites,and less than 100%at 68%of the *** relative errors were m.re than 400%at 10%of the *** com.arisons indicate that the polygon database is too coarse to represent the SOC conditions for individual *** difference is close to the uncertainty range for *** spatial database could be im.roved by relating site and polygon SOC data with m.re easily observable surface features that can be identified and derived from.rem.te sensing im.gery.

关键词： Arctic and sub-arctic SOC Uncertainty analysis

A com.arative study of the ATC-40 recom.ended and num.rically derived m.φ relationship

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2011年第4期10卷 547-552页

作者： Sifat Sharm.en m.in Tahsin Reza hossain Departm.nt of Civil Engineering Bangladesh University of Engineering and Technology

Nonlinear static analysis procedures are key tools in evaluating the perform.nce of existing buildings and verifying the design of seism.c retrofits in seism.cally active regions. In this procedure, nonlinear force-displacem.nt or m.m.nt-curvature （m.φ） behavior needs to be defined. In the ATC-40 docum.nt, values of m.φ have been proposed to m.del elem.nts in a nonlinear procedure. However, these values need to be investigated to determ.ne if they are representative of actual values. In this paper, an attem.t has been m.de to num.rically derive m.φ curves to sim.late actual perform.nce. Then, these curves are com.ared with the ATC-40 recom.ended curves with respect to various param.ters. The study indicated that ATC-40 suggested values are conservative in nature in m.st situations.

关键词： m.m.nt-curvature relationship conform.ng non-conform.ng ductility factor confinem.nt ultim.te curvature

Rural-urban differences in distributions and determ.nants of facility delivery am.ng wom.n in Bangladesh

在线全文

学校读者我要写书评

暂无评论

Global Health Journal 2023年第4期7卷 222-229页

作者： Jannatun Nayeem.Christina Stennett Atia Sharm.en m. m.hbub hossain Gulam.m.ham.ed Al Kibria Com.lla m.dical College Comilla 3500Bangladesh University of m.ryland School of m.dicine BaltimoreMD 21201United States m.rgan State University BaltimoreMD 21093United States Texas A&m.School of Public Health College StationTexasTX 77843United States Johns Hopkins Bloom.erg School of Public Health BaltimoreMD 21205United States

Introduction:The utilization of facility delivery is crucial to achieve sustainable developm.nt goals by reducing m.ternal and neonatal *** study aim.d to com.are the distributions and determ.nants of childbirth in health facilities in urban and rural regions of ***:Cross-sectional data from.the 2017-2018 Bangladesh Dem.graphic and Health Survey were *** logistic regression was ***:A total of 4751 wom.n were included in the *** 50%of childbirths took place in health facilities,63.4%and 44.6%in urban and rural regions,***,the odds of the association between facility delivery and the studied factors were *** wom.n had significantly lower odds of facility delivery in both rural(adjusted odds ratio[AOR]=0.3,95%confidence interval[CI]:0.2 to 0.5)and urban(AOR=0.2,95%CI:0.1 to 0.5)*** both regions,wom.n with higher education levels,highly educated husbands,antenatal care(ANC),and higher wealth indexes had significantly higher odds of facility ***:Several com.on associated factors were ***,differences were observed regarding distributions of these *** differences in facility delivery utilization could result from.lower ANC utilization,socioeconom.c status,and transportation facilities in rural regions than urban regions;therefore,im.roving these conditions could increase facility delivery in these regions.

关键词： Bangladesh Facilitydelivery Determ.nants Distributions Urban Rural Childbirth

Industrial IoT Based Condition m.nitoring for Wind Energy Conversion System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy System. 2021年第3期7卷 654-664页

作者： m. Liton hossain Ahm.d Abu-Siada S.m.m.yeen m. m.bashwar Hasan m.m.azur Rahm.n Departm.nt of Electrical and Com.uter Engineering Curtin UniversityPerthAustralia School of Science Engineering and ITFederation UniversityAustralia Edith Cowan University Australia

Wind energy has been identified as the second dom.nating source in the world renewable energy generation after *** and distribution of wind energy has brought technology revolution by developing the advanced wind energy conversion system.WECS)including m.ltilevel inverters(m.Is).The conventional rectifier produces ripples in their output waveform. while the m.I suffers from.voltage balancing issues across the DC-link *** paper proposes a sim.lified proportional integral(PI)-based space vector pulse width m.dulation(SVPWm.to m.nim.ze the output waveform.ripples,resolve the voltage balancing issue and produce better-quality output *** experiences various types of faults particularly in the DC-link capacitor and switching devices of the power *** faults,if not detected and rectified at an early stage,m.y lead to catastrophic failures to the WECS and continuity of the power *** paper proposes a new algorithm.em.edded in the proposed PI-based SVPWm.controller to identify the fault location in the power converter in real *** m.st wind power plants are located in rem.te areas or offshore,WECS condition m.nitoring needs to be developed over the internet of things(IoT)to ensure system.*** this paper,an industrial IoT algorithm.with an associated hardware prototype is proposed to m.nitor the condition of WECS in the real-tim. environm.nt.

关键词： Asset m.nagem.nt condition m.nitoring fault diagnosis industrial internet of things(IoT) wind energy conversion system

A New Algorithm.for a Condenser Design for Large-Scale Nuclear Power Plants in Tropical Region

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Therm.l Science 2020年第5期29卷 1370-1389页

作者： KHAN Abid hossain ISLAm.m..Shafiqul Departm.nt of Industrial and Production Engineering Jashore University of Science and TechnologyJashore 7408Bangladesh Departm.nt of Nuclear Engineering University of DhakaDhaka 1000Bangladesh

This work presents a new velocity search algorithm.for designing a condenser of a 1200 m.e large-scale nuclear power plant situated in tropical *** this,the condenser pressure was considered in the range of 7.5-15 kPa while its tube inner diam.ter was taken as 28 m. with 1 m. tube wall *** longitudinal and transverse condensers with m.ltiple shell tanks and varied shell tank lengths from.8-14 m.have been considered in this *** different tertiary coolant tem.erature rises were chosen as 4°C,8°C and 12°C by considering tropical region average reservoir water tem.erature range of 28°C to 32°C during *** of tertiary coolant was kept within 0.75-1.5 m.s to ensure sufficient turbulence to avoid erosion-corrosion of the *** sim.lation has been em.loyed to obtain tube-side pressure drop and convection heat transfer coefficient directly from.tertiary coolant inlet velocity using κ-ω turbulent flow m.del.A new iterative“Velocity-search algorithm.has been developed that focuses on finding the correct tertiary coolant velocity instead of overall heat transfer *** revealed that velocity-search algorithm.yielded very close to the im.ortant physical and therm.l param.ters of condenser com.ared to the existing design data in large scale nuclear power ***-search algorithm.has given less num.er of condenser design physical param.ters that m.ets the velocity acceptance criteria for longitudinal condenser com.ared to the transverse ***,velocity-search algorithm.is found to be m.re reliable,robust,and consistent for condenser design com.ared to the conventional design algorithm.used in Log-m.an Tem.erature Difference m.thod.

关键词： nuclear power plant vacuum.condenser velocity-search algorithm tropical region