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Biochar-compost-based controlled-release nitrogen fertilizer intended for an active microbial community

Frontiers of Agricultural Science and Engineering 2024年第2期11卷 326-343页

作者： robiul is.am rubel Lin WEI Salman ALANAZI Abdulkarim ALDEKHAIL Anne CMCIDREIRA Xufei YANG Sanjita WASTI Samarthya BHAGIA Xianhui ZHAO Department of Agricultural and Biosystem Engineering South Dakota State UniversityBrookingsSD 57007USA Tickle College of Engineering University of Tennessee KnoxvilleKnoxvilleTN 37996USA Oak Ridge National Laboratory Oak RidgeTN 37830USA

Nitrogen(N) fertilizers in agriculture suffer losses by volatilization of N to the air, surface runoff and leaching into the soil, resulting in low N use efficiency(NUE)( 50%) and raising severe environmental pollutions. Controlledrelease nitrogen fertilizers(CRNFs) can control the release of N nutrients to NUE in crop production. Different methods were used to develop new ***, different CRNF technologies are still underdeveloped due to inadequate controlling on N releasing time and/or unsustainable diffusion. The study on the influences of CRNF processing parameters on microbial conditions are lacking when the CRNFs composed of various bio-ingredients such as biochar, composts, and biowaste. The complexity of processing methods, material biodegradability, and other physical properties make current CRNFs of questionable value in agricultural production. This research aims to develop a novel biochar-compost-based controlled-release urea fertilizer(BCRUF) to preserve microbial properties carried by the compost. The BCRUF was synthesized by pelletizing the 50:50(dry, wt/wt) mixture of biochar and compost. BCRUF was loaded with urea and then spray-coated with polylactic acid(PLA). The releasing time of two types of BCRUFs, coated and uncoated with PLA, for 80% of N release in water was up to 6 h at three different temperatures(4, 23, and 40 °C), compared to conventional urea fertilizer and commercial environmentally smart N(ESN) fertilizer. The releasing time of coated BCRUF for 80% N release in soil was up to 192 h(8 days). Fourier-transform infrared spectroscopy(FTIR) analysis revealed that no new functional groups were found in the release solution, indicating no new chemical hazards generated. The differential scanning calorimetry(DSC)tests also verified that its thermal stability could be up to 160 °C. The microbe populations in the BCRUF pellets were reduced after the pelleting and drying processes in BCRUF fabrication, but a few bacteria can endure in t

关键词： Soil microbial community biochar compost controlled-release nitrogen fertilizer polylactic acid spray coating

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Designing an Effective Method for Automatic Electric Vehicle Charging Stations in a Static Environment

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Journal of Power and Energy Engineering 2024年第1期12卷 15-28页

作者： Md. robiul is.am Maisha is.am Tania Sarkar Hanif Mia Md. Asadullah Department of Electrical Engineering Hohai University Nanjing China Institute of Science Trade & Technology (ISTT) Dhaka Bangladesh

This article outlines an Effective Method for Automatic Electric Vehicle Charging Stations in a Static Environment. It consists of investigated wireless transformer structures with various ferrite forms. WPT technology has rapidly advanced in the last few years. At kilowatt power levels, the transmission distance grows from a few millimeters to several hundred millimeters with a grid to load efficiency greater than 90%. The improvements have made the WPT more appealing for electric vehicle (EV) charging applications in both static and dynamic charging scenarios. Static and dynamic WEVCS, two of the main applications, are described, and current developments with features from research facilities, academic institutions, and businesses are noted. Additionally, forthcoming concepts based WEVCS are analyzed and examined, including “dynamic” wireless charging systems (WCS). A dynamic wireless power transfer (DWPT) system, which can supply electricity to moving EVs, is one of the feasible alternatives. The moving secondary coil is part of the dynamic WPT system, which also comprises of many fixed groundside (primary) coils. An equivalent circuit between the stationary system and the dynamic WPT system that results from the stationary system is demonstrated by theoretical investigations. The dynamic WPT system’s solenoid coils outperform circular coils in terms of flux distribution and misalignment. The WPT-related EV wireless charging technologies were examined in this study. WPT can assist EVs in overcoming their restrictions on cost, range, and charging time.

关键词： Dynamic Wireless Power Transfer (DWPT) Wireless Charging System (WCS) Electric Vehicle (EV) Dynamic Performance

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Effects of bottom bracings on torsional dynamic characteristics of horizontally curved twin I-girder bridges with different curvatures

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Earthquake Engineering and Engineering Vibration 2012年第2期11卷 149-162页

作者： robiul Awall Toshiro Hayashikawa Takashi Matsumoto Graduate School of Engineering Hokkaido University Faculty of Engineering Hokkaido University

Curved twin I-girder bridges (CTIGBs) have low torsional stiffness that makes them vulnerable to dynamic loads. This study investigates the effects of bottom bracings on the torsional dynamic characteristics of CTIGBs. Five types of bottom bracings are designed to investigate their effects on the dynamic characteristics of CTIGBs with different curvatures under free and forced vibrations. To perform numerical investigations, three-dimensional (3-D) finite element (FE) bridge and vehicle models are established using commercial ANSYS code, and then a vehicle-bridge interaction analysis approach is proposed. Road roughness profiles generated from power spectral density and cross spectral functions are also taken into account in the analyses. The numerical results show that torsional frequencies increase significantly after providing bottom bracings, and the increasing rate depends on the type of bottom bracings and their locations of installation. Bottom bracings can act as load transmitting members from one main girder to the others. Large negative bearing forces that have occurred in bridges with small radii of curvatures can be remarkably reduced by providing bottom bracing systems. It is found that the performances of several bottom bracing systems are effective in improving the torsional dynamic characteristics of the bridges in this study.

关键词： bottom bracing CTIGB FE model torsional stiffness dynamic response negative bearing force

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保水剂和负压供水对玉米生理生长及水分利用效率的影响

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农业工程学报 2011年第7期27卷 82-88页

作者：毛思帅 M.robiul is.am 薛绪掌曾昭海胡跃高国家农业智能装备技术研究中心北京100097 中国农业大学农学与生物技术学院北京100193 拉吉沙伊大学农学与农业推广系

采用一种负水头供水控水系统,通过调节供水负压值来控制不同的土壤含水率,研究3种供水负压(3、6、9kPa)下,保水剂对玉米生理、生长性状以及节水效果的影响。结果表明:在供水负压为3kPa时,保水剂使玉米株高降低了7.4%,叶面积降低了14.9%... 详细信息

采用一种负水头供水控水系统,通过调节供水负压值来控制不同的土壤含水率,研究3种供水负压(3、6、9kPa)下,保水剂对玉米生理、生长性状以及节水效果的影响。结果表明:在供水负压为3kPa时,保水剂使玉米株高降低了7.4%,叶面积降低了14.9%,地上部干物质量降低了12.4%,地下部干物质量降低了7.3%,水分利用效率降低了12.6%。在供水负压为6kPa和9kPa时,保水剂使玉米株高分别增加了10.0%、37.9%,叶面积分别增加了14.2%、90.8%,地上部干物质量分别显著增加40.4%、104.6%,地下部干物质量分别增加了35.3%、83.8%,水分利用效率分别显著提高了26.9%、65.7%。同时,与无保水剂的相比,玉米叶片水势分别增加7.1%、19.2%,叶片相对含水率、净光合速率、胞间CO2浓度、蒸腾速率也较高。表明在水分受限制条件下,保水剂能够改善植株的生理生长特性,提高水分利用效率。

关键词：生理生长水分水分利用效率供水负压保水剂玉米

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Context-Aware System Modeling Based on Boolean Control Network

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Open Journal of Applied Sciences 2015年第11期5卷 661-668页

作者： M. Humayun Kabir M. robiul Hoque Department of Applied Physics Electronics and Communication Engineering Islamic University Kushtia Bangladesh Department of Computer Science and Engineering Islamic University Kushtia Bangladesh

Boolean control network consists of a set of Boolean variables whose state is determined by other variables in the network. Boolean network is used for modeling complex system. In this paper, we have presented a model of a context-aware system used in smart home based on Boolean control networks. This modeling describes the relationship between the context elements (person, time, location, and activity) and services (Morning Call, Sleeping, Guarding, Entertainment, and normal), which is effective to logical inference. We apply semi tensor matrix product to describe the dynamic of the system. This matrix form of expression is a convenient and reasonable way to design logic control system.

关键词： Mathematical Modeling Context-Aware System Smart Home Boolean Control Network Semi-Tensor Matrix Product

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Improved Twin I-Girder Curved Bridge-Vehicle Interaction Analysis and Human Sensitivity to Vibration

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Journal of Civil Engineering and Architecture 2016年第2期10卷 192-202页

作者： Md. robiul Awall Toshiro Hayashikawa Tasnuva Humyra Department of Civil Engineering Rajshahi University of Engineering and Technology Rajshahi 6204 Bangladesh Faculty of Engineering Hokkaido University Sapporo 060-8628 Japan Department of Civil Engineering Rajshahi Science and Technology University Natore 6400 Bangladesh

The perceptible vibration of curved twin I-girder bridges under traffic loads is an important design consideration, because this bridge have rather low torsional stiffness that produce excessive vibrations. The objective of this investigation was to study the vibration of curved twin I-girder bridges due to moving vehicles and the effect of vibrations on bridge users. To this end, a comprehensive three-dimensional finite element models for bridge and vehicle are developed by using ANSYS code for studying bridge-vehicle interaction and the resultant sensitivity to vibration. Truck parameters include the body, the suspension and the tires. Gap and actuator elements are incorporated into the tire models to simulate the separation between the tires and road surface, and road surface roughness, respectively. Road roughness profiles are generated from power spectral density and cross spectral functions. To couple the motion of the bridge and vehicle, Lagrange multipliers and constraint equations are utilized through the augmented Lagrangian method. A parametric study is performed to identify the effect of various parameters on the vibration of the bridge. The results have been expressed in the form of human perceptibility curves. This study finds that the bridge response is significantly influenced by the road roughness, bump height at expansion joint and vehicle speeds. The results show that the inclusion of features such as increasing the torsional stiffness by providing additional stiffened bracing has major effects on the reduction of perceptible vibration.

关键词： Perceptible vibration bridge-vehicle interaction torsional stiffness finite element model roughness bottom bracings.

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Quality Study of Automated Machine Made Environmentally Friendly Brick (KAB) Sample Using Film Neutron Radiography Technique

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Journal of Building Construction and Planning Research 2013年第4期1卷 141-152页

作者： Khurshed Alam robiul is.am Sudipta Saha Nurul is.am Syed Azharul is.am Department of Physics Jahangirnagar University Savar Bangladesh Institute of Nuclear Science and Technology AERE Savar Bangladesh

Neutron radiography (NR) technique has been adopted to study the internal structure and quality of the KAB bricks made by Hoffman kiln method. Thermal neutron radiography facility installed at the tangential beam port of 3 MW TRIGA Mark-II Research Reactor, AERE, Savar, Dhaka, Bangladesh is used in the present study. Measurements were made to determine the internal structure and quality of the automated machine made environmentally friendly brick sample. In this case, optical density/gray values of the neutron radiographic images of the sample have been measured. From these measurements, the porosity, water penetrating height, water penetrating behavior, initial rapid absorption of water (IRA), elemental distribution/homogeneity and incremental water intrusion area in the sample have been found. From the observation of different properties, it is seen that, homogeneity of the Hoffman kiln brick KAB is not perfectly homogeneous and contains small internal porosity;the incremental water intrusion area is very poor, and the water penetrating height through the two edges is higher than the middle part;the initial rapid absorption (IRA) rate is also very poor and the water penetrating behavior of the samples is different as like as stair, capillary, wave and zigzag shape. From these points of view, it is concluded that the quality of the environmentally friendly brick KAB is better. The results obtained and conclusion made in this study can only be compared to the properties of bricks produced under similar conditions with similar raw materials.

关键词： Neutron Radiography Technique Water Penetrating Height/Behavior IRA

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保水剂和施肥量对沙地燕麦生产的影响

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麦类作物学报 2011年第2期31卷 308-313页

作者：毛思帅 M.robiul is.am 贾鹏飞薛绪掌曾昭海胡跃高中国农业大学农学与生物技术学院北京100193 国家农业信息技术研究中心北京100089

为给保水剂在沙地燕麦生产中的应用提供依据,在吉林白城雨养贫瘠沙地条件下,采用完全随机设计,研究了不同施肥水平下保水剂对燕麦秸秆和籽粒产量、品质及土壤养分的影响。结果表明,在4个复合肥(N-P2O5-K2O:15-15-15)施用量(375、300、22... 详细信息

为给保水剂在沙地燕麦生产中的应用提供依据,在吉林白城雨养贫瘠沙地条件下,采用完全随机设计,研究了不同施肥水平下保水剂对燕麦秸秆和籽粒产量、品质及土壤养分的影响。结果表明,在4个复合肥(N-P2O5-K2O:15-15-15)施用量(375、300、225和150kg·hm-2)下,与对照相比,施用保水剂(60kg·hm-2)使燕麦平均秸秆产量、籽粒产量、地上部和地下部生物量分别增加38.58%、22.60%、32.02%和24.59%,差异均显著(P<0.05);叶、茎、籽粒平均粗蛋白含量分别增加0.65、4.09和2.58个百分点,相对饲用价值分别增加13.28、7.6和18.57个百分点;相对增加了耕层土壤养分(全N、速效P、速效K)含量,对0～10cm土层影响显著。肥料施用量显著影响燕麦秸秆产量、籽粒产量、地上和地下部生物量、植株粗蛋白含量和0～30cm土层养分含量。施用保水剂可显著提高籽粒产量平均肥料利用效率29.6%。60kg·hm-2保水剂和375kg·hm-2肥料施用量组合下燕麦产量最高,品质最优。

关键词：燕麦保水剂肥料产量品质

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孟加拉吉大港动物园恒河猕猴发生具有公共卫生重要性的结核病(英文)

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中国人兽共患病学报 2014年第9期30卷 909-912页

作者： Md Shafiqul is.am Khan Farzana is.am Rume Md Mongur Morshed Chowdhury Mussammet Rasheda Begum Md robiul Karim Department of Food Microbiology Patuakhali Science and Technology University Patuakhali 8602 Bangladesh Department of Microbiology Patuakhali Science and Technology University Patuakhali 8602 Bangladesh Chittagong Zoo Chittagong 4225 Bangladesh Department of Agricultural Economics and Social Science Chittagong Veterinary and Animal Sciences University Chittagong 4225 Bangladesh 河南农业大学牧医工程学院寄生虫学研究室郑州450002

本调查自2012年7月至2012年9月在孟加拉吉大港动物园进行,确诊猴发生结核病。发病猴共46只,10至21月龄恒河猕猴表现出反应迟钝、明显消瘦的症状,皮内注射结核菌素,隔离检疫3天,仅有7只猴(15.22%)表现阳性结果。结核菌素阳性动物中,5只... 详细信息

本调查自2012年7月至2012年9月在孟加拉吉大港动物园进行,确诊猴发生结核病。发病猴共46只,10至21月龄恒河猕猴表现出反应迟钝、明显消瘦的症状,皮内注射结核菌素,隔离检疫3天,仅有7只猴(15.22%)表现阳性结果。结核菌素阳性动物中,5只在一个月内死亡,剖检检查在肺脏发现结核结节。肺脏样品萋尼氏抗酸染色和组织病理学检查,在染片中观察到抗酸染色的结核分枝杆菌,组织病理学观察到淋巴细胞、嗜中性白细胞和实质中高度增生的纤维组织围绕着上皮样巨噬细胞形成结核性肉芽肿,肺脏的肺泡壁增厚。上述检查结果证明猕猴发生结核病。

关键词：恒河猕猴结核病结核菌素组织病理学

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The Effect of La on the Physical and Magnetic Properties of NiCuZn Ferrites

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材料科学与工程（中英文B版） 2011年第7期1卷 891-894页

作者： Saiduzzaman Md. Abul Hossain A.K.M. Hakim Saroaut Noor robiul is.am Md. Al-Mamun Department of Physics Jahangirnagar University Dhaka Bangladesh Materials Science Division Atomic Energy Centre Dhaka Bangladesh Department of Physics KUET Khulna Bangladesh

Lanthanum-substituted NiCuZn ferrites Ni0.26Cu0.16Zn0.58LaxFe2-xO4 were prepared by usual ceramic method. The samples were investigated for their structural properties such as lattice parameter and density as a function of La content. The lattice parameter of the samples increased with the increasing of La which might be attributed to the larger ionic radius of La3+. The density slightly increased with the increasing of La content. The Scanning Electron Microscope (SEM) micrographs of the samples were observed to investigate grain sizes. It was also observed that bulk density was less than X-ray density. The electrical and magnetic properties such as resistivity, initial permeability, Curie temperature as a function of temperature, frequency and La content were also studied. The initial permeability at 100 kilohertz was found to increase at a certain limit and then decrease with the increasing of La content. The magnetic hysteresis loops of the samples were measured at room temperature.

关键词： NiCuZn铁氧体磁学性质扫描电子显微镜物理射线密度镧晶格参数居里温度

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