检索结果-南通市图书馆

Chloride ingress and macro-cell corrosion of steel in concrete made with recycled brick aggregate

在线全文

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2021年第6期15卷 1358-1371页

作者： Tarek Uddin MOHAMMED Mahfuzur RAHMAN Ahmed SABBIR Mohammad Mehedi HASAN abdullah al mamun Department of Civil and Environmental Engineering Islamic University of TechnologyBoard BazarGazipur 1704Bangladesh Department of Civil Engineering University of Information Technology and SciencesBaridharaDhaka 1202Bangladesh Bangladesh Road Research Laboratory Roads and Highways DepartmentMirpurDhaka 1216Bangladesh

An investigation on chloride ingress and macro-cell corrosion of steel bars in concrete made with recycled brick aggregate(RBA)was carried *** control cases,virgin brick aggregate(BA)and stone aggregate(SA)were also *** cylindrical and cracked prism specimens were studied for 16 different *** prism specimens were made with a segmented steel bar providing electrical connection from outside of the specimens to measure macro-cell corrosion current continuously under seawater splash exposure for a period of 30 d using a data *** specimens were submerged in 3%NaCl solution at a temperature of 40℃ to investigate chloride ingress in concrete made with RBA,BA,and SA after 120 and 180 ***-cell potential,corrosion area,and depths of corrosion were also *** chloride ingress as well as corrosion of steel bars in concrete made with the different types of aggregate is ordered as RBA>BA>SA.

关键词： brick aggregate chloride ingress macro-cell corrosion recycled brick aggregate

Improved greenhouse cucumber production under deficit water and fertilization in Northern China

在线全文

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2018年第4期11卷 58-64页

作者： Shaikh abdullah al mamun Hossain Lixue Wang Haisheng Liu College of Water Conservancy Shenyang Agricultural UniversityShenyang 110866LiaoningChina Department of Agricultural Engineering Patuakhali Science and Technology UniversityDumkiPatuakhali 8602Bangladesh

The objective of this study was to investigate the effects of different water and fertilizer applications on biomass,yield and fruit physical quality of greenhouse cucumber under drip *** experiment was conducted at Water Conservancy Research Institute,Shenbei District,Shenyang,Northern China during February-July,*** treatments were used in randomized block design consisted of three levels of water field capacity(FC)and urea-potash(N-K)fertilizer combinations:W1(65%of FC),W_(2)(75%of FC),W3(85%of FC)and N_(1)-K_(1)(285-305 kg/hm^(2)),N2-K2(420-435 kg/hm^(2)),N_(3)-K_(3)(530-565 kg/hm^(2)).Local farmers’conventional application of water(100%)and fertilizer(NPK)was considered as check(CK)for *** obtained was analyzed(ANOVA)to check the significant effect of *** results revealed that,treatment W_(3)N_(2)K_(1) obtained highest cucumber yield of 129.99 t/hm^(2),while W_(1)N_(1)K_(1) recorded the lowest yield(113.29 t/hm^(2)),in which total amount of seasonal water applied ranges from 85.3 mm to 172.36 *** highest yield was obtained 0.5%greater than the CK yield(129.35 t/hm^(2)).The water and fertilizer application was significantly(pal *** was also revealed that,the highest green biomass accumulation(572.4 g/plant)and fruit diameter(27.92 mm)with treatment W_(3)N_(2)K_(1) have significant influence on improved *** conclusion,the improved cucumber yield indicated 15%deficit water tolerance,in which average seasonal yield response factor(Ky)was calculated as ***,the treatment W_(3)N_(2)K_(1) could successfully be used to minimize water and fertilizer application for improving greenhouse cucumber yield.

关键词： cucumber drip irrigation fertilizer greenhouse yield

Automated Complex Fabric Faults Detection Using a Hybrid Method

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

Automated Complex Fabric Faults Detection Using a Hybrid Met...

作者： abdullah-al-mamun 华南理工大学

学位级别：硕士

Fault detection or identification is highly important to fabric quality ***,faults are detected by human *** efficiency of this manual technique is low and the missed rate is high because of eye *** the best case,a quality control person cannot detect more than 60–70 % of the present *** this study a Hybrid technique is developed to identify complex faults of warp-knitted fabrics *** this system,we use smart cameras and a Human Machine Interface（HMI）*** hybrid detection or identification algorithm is comprised of numerous single techniques such as Gabor filter,PCNN,morphological filter,and another associated technique（Binarizing）those are running on the SOC processor of the smart camera for identifying distinctive types of complex faults on ***,Gabor filters are employed to enhance the contrast of images captured by a CMOS *** fault is not detected after Gabor filter it goes through ***,fault areas are segmented by PCNN with adaptive parameter ***,for making the PCNN output more clear and faults more obvious,the morphological filter has been used in this detection or identification ***,smart cameras will notice the controller to stop the warp-knitting machine once faults are found *** results demonstrate that the hybrid technique is superior to Gabor and PCNN techniques on fabric complex faults detection or identification *** this hybrid technique we get 97.08% fault detection or identification accuracy which is superior to Gabor and PCNN *** operations in a textile factory can be verified the effectiveness of the inspection system.

关键词：复杂织物故意诊断缺陷检测混合方法机器视觉

Jaundice in pediatric visceral leishmaniasis (kala-azar) patients

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2009年第2期2卷 27-29页

作者： AKM mamunur Rashid Md.Asrafuzzaman abdullah al mamun abdullah al Mahboob Department of Paediatrics Khulna Medical CollegeKhulnaBangladesh Department of Microbiology Khulna Medical CollegeKhulnaBangladesh Department of Medicine Khulna Medical CollegeKhulnaBangladesh

Objective:Visceral leishmaniasis(Kala-azar) is endemic in many countries including *** presentation of visceral leishmaniasis in children and adult may vary and at time may simulate many tropical and hepatobiliary *** and ascites are not common in kala-azar ***:During the period of January 2005 to December 2006,all the records of the confirmed kala-azar patients presented with jaundice were included in this ***-azar was confirmed by serology test ICT(Immuno Chromatography) and Bone Marrow ***:Total 12 kala-azar patients were encountered during this *** these twelve cases,presenting features were jaundice(7),splenomegaly(12),hepatomegaly(11) and ascites (4).Initial clinical diagnosis of chronic liver disease(CLD) was made in(5),Congenital hemolytic anaemia in(1) and kala-azar in rest of the patients(6 ).Common leucopenia and relative lymphocytosis was not observed in any ***:Kala-azar may present with various clinical manifestation in children and *** can be considered to be a common manifestation particularly in pediatric kala-azar ***,it may mislead to another diagnosis if it is taken as a rare feature in kala-azar.

关键词： Jaundice Pediatric(kala-azar) Patients

Toxic tau: structural origins of tau aggregation in alzheimer’s disease

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

Neural Regeneration Research 2020年第8期15卷 1417-1420页

作者： abdullah al mamun Md.Sahab Uddin Bijo Mathew Ghulam Md Ashraf Department of Pharmacy Southeast UniversityDhakaBangladesh Pharmakon Neuroscience Research Network DhakaBangladesh Division of Drug Design and Medicinal Chemistry Research Lab Department of Pharmaceutical ChemistryAhalia School of PharmacyPalakkadIndia King Fahd Medical Research Center King Abdulaziz UniversityJeddahSaudi Arabia Department of Medical Laboratory Technology Faculty of Applied Medical SciencesKing Abdulaziz UniversityJeddahSaudi Arabia

alzheimer’s disease is characterized by the extracellular accumulation of the amyloidβin the form of amyloid plaques and the intracellular deposition of the microtubule-associated protein tau in the form of neurofibrillary *** of the alzheimer’s drugs targeting amyloidβhave been failed in clinical ***,tau pathology connects greatly in the pathogenesis of alzheimer’s *** protein enhances the stabilization of microtubules that leads to the appropriate function of the *** in the quantity or the conformation of tau protein could affect its function as a microtubules stabilizer and some of the processes wherein it is *** molecular mechanisms leading to the accumulation of tau are principally signified by numerous posttranslational modifications that change its conformation and structural ***,aberrant phosphorylation,as well as truncation of tau protein,has come into focus as significant mechanisms that make tau protein in a pathological ***,the shape-shifting nature of tau advocates to comprehend the progression of alzheimer’s disease *** this review,we emphasize the recent studies about the toxic and shape-shifting nature of tau in the pathogenesis of alzheimer’s disease.

关键词： alzheimer’s disease neurofibrillary tangles shape-shifting nature of tau tau aggregation toxic tau

Community ecology and spatial distribution of trees in a tropical wet evergreen forest in Kaptai national park in Chittagong Hill Tracts, Bangladesh

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2014年第2期25卷 311-318页

作者： S. M. Feroz Md Rabiul alam Prokash Das abdullah al mamun Forestry and Wood Technology Discipline Khulna Universtity

We investigated the floristic composition, woody species diversity and spatial distribution of trees in a tropical wet evergreen forest in Kaptai national park in Chittagong Hill Tracks, Bangladesh. We recorded 25 families, 37 genera, 40 species and 1771 woody individuals in a 0.09 ha plot. Euphorbiaceae and Moraceae were the most species- rich families, and Castanopsis, Ficus and Terminaliawere the most species-rich genera. Bursera serrata Wall. ex Colebr. was the dominant species in terms of highest importance value （13%）. Trema orientalis （L.） B1 was typically a light demanding species as it appeared in the top can- opy with only one individual having the seventh highest IV, but had no regeneration. The expected maximum number of species （Smax） was 140, indicating that many species may invade the forest as the Sm~ is greater than the recorded total number of species. The nature of the disappear- ance and appearance of species in the present forest reflects instability of floristic composition. The values of Shannon＇s index H＇ and Pielou＇s index J＇（evenness） were 3.36 bit and 0.63, respectively. These values show moderately high species diversity as compared to other subtropical forests in the tropics. In addition, a sample area of 200 m2 in this forest would be sufficient for measuring the diversity indices H＂ and ,/＇, whereas the trend of J＇may indicate the rate of equality of individuals among the different species decreased with increasing area. The distribu- tion pattern for the total stand was completely random. However, the dominant species showed aggregate distribution for small areas, but random distribution for large areas. The spatial association between species showed that the strongest positive interspecific association occurred between Streblus asper Lour. and Castanea indica Roxh. （09 = 0.51）. As a whole, most species were weakly associated with each other, of which 58% species associations were completely negative. The result of cluster analysis s

关键词： Chittagong Hill Tracts floristic composition spatial distribution of trees tropical wet evergreen forest woody species diversity

Kinetic adsorption of application of carbon nanotubes for Pb(Ⅱ) removal from aqueous solution

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2009年第4期21卷 539-544页

作者： Nassereldeen A Kabbashi Muataz A Atieh abdullah al-mamun Mohamed E S Mirghami MD Z alam Noorahayu Yahya Bio-Environmental Research Unit Department of Biotechnology Engineering International Islamic University MalaysiaJalan Gombak 50728 Malaysia Nanoscience and Nanotechnology Group Department of Biotechnology Engineering International Islamic University MalaysiaJalan Gombak 507283 Malaysia Department of Chemical Engineering King Fahd University for Petroleum and MineralSaudi Arabia

The capability of carbon nanotubes （CNTs） to adsorb lead （Pb） in aqueous solution was investigated. Batch mode adsorption experiment was conducted to determine the effects of pH, agitation speed, CNTs dosage and contact time. The removal of Pb（II） reached maximum value 85% or 83% at pH 5 or 40 mg/L of CNTs, respectively. Higher correlation coefficients from Langmuir isotherm model indicates the strong adsorptions of Pb（II） on the surface of CNTs （adsorption capacity Xm = 102.04 mg/g）. The results indicates that the highest percentage removal of Pb （96.03%） can be achieved at pH 5, 40 mg/L of CNTs, contact time 80 min, and agitation speed 50 r/min.

关键词： lead removal carbon nanotubes kinetic modeling adsorption

Applications of Smart-Contracts Utilizing Escrow System Based on We Chat

在线全文

学校读者我要写书评

暂无评论

Applications of Smart-Contracts Utilizing Escrow System Base...

作者： MD abdullah-al mamun（马木恩）中国地质大学(北京)

学位级别：硕士

在商业中,客观性至关重要。没有时间或者不应该去异想天开。目标必须明确界定,并附有如何实现目标的纲要。当两个或多个当事人订立采购货物或服务合同时,可以选择使用托管付款程序,保证严格遵守合同条件。当这种情况发生时,这些文件或... 详细信息

在商业中,客观性至关重要。没有时间或者不应该去异想天开。目标必须明确界定,并附有如何实现目标的纲要。当两个或多个当事人订立采购货物或服务合同时,可以选择使用托管付款程序,保证严格遵守合同条件。当这种情况发生时,这些文件或金融工具应该由一个信任,客观和公正的第三方承包商,协调人或中间人(代管提供者)持有,他们确认所有规定的规范(通常概述为步骤)已被卖方满足。经验证后,双方随即被要求结束交易文件的签署,并由买方指示代管提供方向卖方支付已支付的资金。付款完成表明合同的结束。托管的对象通常是源代码,发布条件通常涉及系统提供商可能无法提供服务的特定潜在情况(例如破产,提供服务的更改等)。在目前这个网络犯罪已经变得更加复杂的时代,托管支付消除了双方在选择直接交易时经常遇到的许多风险因素。旨在托管用户的主要威慑因素是欺诈性托管提供商的巨大扩散,特别是在线。建议双方对任何提供托管服务的组织进行彻底的调查,因为许多组织经常反映或克隆较为成熟和有信誉的机构的网站,以通过接受资金或商品借口欺骗不知情的个人或组织。商业交易的性质通常决定了所涉风险的水平,互联网销售额可以理解为最高。托管付款的主要吸引力是在广泛的可能情况下充分保护买卖双方的利益:卖方保证不会被欺骗,并保证全额支付严格的货物或服务在买方受到保护的情况下,不遵守规定的准则,免受欺诈,低质量和缺货或迟交。托管的另一个优点是在技术转让领域。它确保买方或公司在技术提供者离职的情况下得到保护。在这种情况下,组织与服务提供商签订代管协议,如果提供者离开,他们可以轻松访问关键应用程序,知识内容,软件和程序。通过托管到位,组织确保他们访问关键的应用程序源代码,如果灾难发生。这项研究的目的是开发一个“智能合同”模型,作为使用托管和微信系统的各种积极方面融合的托管支付程序的评估和风险评估的工具。它还提供了各种托管协议类型的描述性概述,并阐述其个人价值主张。

关键词：微信托管支付系统第三方支付系统微信API 智能合同

Ecosystem services assessment using a valuation framework for the Bangladesh Sundarbans: livelihood contribution and degradation analysis

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Journal of Forestry Research 2017年第1期28卷 1-13页

作者： M.M.abdullah-al-mamun Kazi Mohammad Masum A.H.M.Raihan Sarker Asyraf Mansor Institute of Forestry and Environmental Sciences Chittagong University Department of Forestry and Environmental Science Shahjalal University of Science and Technology School of Biological Sciences Universiti Sains Malaysia

The ecosystem services provided by the Bangladesh Sundarbans contribute in various sectors especially to the livelihood of the surrounding peoples, but they are often overlooked in the valuation process. This study investigates the significance of ecosystem services on peoples＇ lives and how these services are affected by climate change and other factors. Here an economic valuation framework was used to list the ecosystem services provided by this mangrove forest. Direct uses included timber, gol- pata （Nypa fruticans）, honey, beeswax, fish, shrimp larvae and tourism. Indirect uses included carbon storage, protection from cyclones and tidal surges, breeding and nursery grounds for the aquatic species, and biodiversity conservation. This work also found that the ecosystem services were diminished by fresh water flow reduction, overharvesting, sea level rise, salinity increase, poaching, and climate change. In the present context and future scenario, sea level rise will be an important contributor to changes in ecosystem services. But because many factors impact sea level rise, the impact of climate change takes on less importance than many other causes of ecosystem service degradation in the Bangladesh Sundarbans.

关键词： Climate change Bangladesh Sundarbans Ecosystem service Life and livelihood - Mangrove