检索结果-南通市图书馆

Sea salt bittern-driven forward osmosis for nutrient recovery from black water: A dual waste-to-resource innovation via the osmotic membrane process

引用

Frontiers of Environmental Science & Engineering 2020年第2期14卷 197-206页

作者： Wenchao Xue May Zaw Xiaochan An Yunxia Hu Allan Sriratana Tabucanon Department of Energy Environment and Climate ChangeSchool of EnvironmentResources and DevelopmentAsian Institute of TechnologyP.O.Box 4Klong LuangPathumthani 12120Thailand State Key Laboratory of Separation Membranes and Membrane Processes School of Materials Science and EngineeringTianjin Polytechnic UniversityTianjin 300387China Faculty of Environment and Resource Studies Mahidol UniversityNakhon Pathom 71370Thailand

A dual“waste-to-resource”innovation in nutrient enrichment and recovery from domestic black water using a sea salt bittern(SSB)-driven forward osmosis(FO)process is proposed and demonstrated.The performance of SSB as a“waste-to-resource”draw solution for FO was first evaluated.A synthetic SSB-driven FO provided a water flux of25.67±3.36 L/m2 h,which was 1.5-1.7 times compared with synthetic seawater,1 M NaCl,and 1M MgCL.Slightly compromised performance regarding reverse solute selectivity was observed.In compensation,the enhanced reverse diffusion of Mg+suggested superior potential in terms of recovering nutrients in the form of struvite precipitation.The nutrient enrichment was performed using both the pre-filtered influent and effluent of a domestic septic tank.Over 80%of phosphate-P recovery was achieved from both low-and high-strength black water at a feed volume reduction up to 80%^90%.With an elevated feed pH(~9),approximately 60%-85%enriched phosphate-P was able to be recovered in the form of precipitated stuvite.Whereas the enrichment performance of total Kjeldahl nitrogen(TKN)largely differed depending on the strength of black water.Improved concentration factor(i.e.,3-folds)and retention(>60%)of TKN was obtained in the high-nutrient-strength black water at a feed volume reduction of 80%,in comparison with a weak TKN enrichment observed in low-strength black water.The results suggested a good potential for nutrient recovery based on this dual“waste-to-resource”FO system with proper management of membrane cleaning.

关键词： forward osmosis Sea salt bittern Black water Nutrient recovery pH

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

Development of Data Mining Models Based on Features Ranks Voting (FRV)

引用

Computers, Materials & Continua 2022年第11期73卷 2947-2966页

作者： Mofreh A.Hogo Department of Electrical Engineering Benha Faculty of EngineeringBenha UniversityBenha13518Egypt

Data size plays a significant role in the design and the performance of data mining models.A good feature selection algorithm reduces the problems of big data size and noise due to data redundancy.Features selection algorithms aim at selecting the best features and eliminating unnecessary ones,which in turn simplifies the structure of the data mining model as well as increases its performance.This paper introduces a robust features selection algorithm,named Features Ranking Voting Algorithm FRV.It merges the benefits of the different features selection algorithms to specify the features ranks in the dataset correctly and robustly;based on the feature ranks and voting algorithm.The FRV comprises of three different proposed techniques to select the minimum best feature set,the forward voting technique to select the best high ranks features,the backward voting technique,which drops the low ranks features(low importance feature),and the third technique merges the outputs from the forward and backward techniques to maximize the robustness of the selected features set.Different data mining models were built using obtained selected features sets from applying the proposed FVR on different datasets;to evaluate the success behavior of the proposed FRV.The high performance of these data mining models reflects the success of the proposed FRV algorithm.The FRV performance is compared with other features selection algorithms.It successes to develop data mining models for the Hungarian CAD dataset with Acc.of 96.8%,and with Acc.of 96%for the Z-Alizadeh Sani CAD dataset compared with 83.94%and 92.56%respectively in[48].

关键词： Evaluator features selection data mining forward backward voting feature rank

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

Performance analysis and design of MIMO-OFDM system using concatenated forward error correction codes

引用

Journal of Central South University 2017年第6期24卷 1322-1343页

作者： Arun Agarwal Saurabh N.Mehta PhD Scholar School of Electrical EngineeringDepartment of Information TechnologyAMET UniversityTamil NaduChennai 603112India Department of Electronics and Telecommunication Engineering Vidyalankar Institute of TechnologyMumbai-400037MaharashtraIndia

This work investigates the performance of various forward error correction codes, by which the MIMO-OFDM system is deployed. To ensure fair investigation, the performance of four modulations, namely, binary phase shift keying(BPSK), quadrature phase shift keying(QPSK), quadrature amplitude modulation(QAM)-16 and QAM-64 with four error correction codes(convolutional code(CC), Reed-Solomon code(RSC)+CC, low density parity check(LDPC)+CC, Turbo+CC) is studied under three channel models(additive white Guassian noise(AWGN), Rayleigh, Rician) and three different antenna configurations(2×2, 2×4, 4×4). The bit error rate(BER) and the peak signal to noise ratio(PSNR) are taken as the measures of performance. The binary data and the color image data are transmitted and the graphs are plotted for various modulations with different channels and error correction codes. Analysis on the performance measures confirm that the Turbo + CC code in 4×4 configurations exhibits better performance.

关键词： bit error rate (BER) convolutional code (CC) forward error correction peak signal to noise ratio (PSNR) Turbo code

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

Potential use of nanofiltration like-forward osmosis membranes for copper ion removal

引用

Chinese Journal of Chemical Engineering 2020年第2期28卷 420-428页

作者： Wan Nur Ain Shuhada Abdullah Sirinan Tiandee Woeijye Lau Farhana Aziz Ahmad Fauzi Ismail Advanced Membrane Technology Research Centre(AMTEC) Universiti Teknologi Malaysia81310 SkudaiJohorMalaysia School of Chemical and Energy Engineering Universiti Teknologi Malaysia81310 SkudaiJohorMalaysia Faculty of Science and Industrial Technology Prince of Songkla UniversitySurat Thani Campus84000 Surat ThaniThailand

The discharge of industrial effluent containing heavy metal ions would cause water pollution if such effluent is not properly treated.In this work,the performance of emerging nanofiltration(NF)like-forward osmosis(FO)membrane was evaluated for its efficiency to remove copper ion from water.Conventionally,copper ion is removed from aqueous solution via adsorption and/or ion-exchange method.The engineered osmosis method as proposed in this work considered four commercial NF membranes(i.e.,NF90,DK,NDX and PFO)where their separation performances were accessed using synthetic water sample containing 100 mg·L-1 copper ion under FO and pressure retarded osmosis(PRO)orientation.The findings indicated that all membranes could achieve almost complete removal of copper regardless of membrane orientation without applying external driving force.The high removal rates were in good agreement with the outcomes of the membranes tested under pressuredriven mode at 1 MPa.The use of appropriate salts as draw solutes enabled the NF membranes to be employed in engineered osmosis process,achieving a relatively low reverse solute flux.The findings showed that the best performing membrane is PFO membrane in which it achieved N 99.4%copper rejection with very minimum reverse solute flux of<1 g·m-2·h-1.

关键词： Nanofiltration forward osmosis Copper Divalent salt Water flux

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

An agent-based simulation with NetLogo platform to evaluate forward osmosis process(PRO Mode)

引用

Chinese Journal of Chemical Engineering 2018年第12期26卷 2487-2494页

作者： Mostafa Taherian Seyed Mahmoud Mousavi Hooman Chamani Chemical Engineering Department Faculty of Engineering Ferdowsi University of Mashhad Research Center of Membrane Processes and Membrane Faculty of Engineering Ferdowsi University of Mashhad

forward osmosis(FO), as an emerging technology, is influenced by different factors such as operating conditions,module characteristics, and membrane properties. The general aim of this study was to develop a suitable(flexible,comprehensive, and convenient to use) computational tool which is able to simulate osmosis through an asymmetric membrane oriented in pressure retarded osmosis(PRO) mode in a wide variety of scenarios. For this purpose, an agent-based model was created in NetLogo platform, which is an easy-to-use application environment with graphical visualization abilities and well suited for modeling a complex system evolving over time. The simulation results were validated with empirical data obtained from literature and a great agreement was observed. The effect of various parameters on process performance was investigated in terms of temperature,cross-flow velocity, length of the module, pure water permeability coefficient, and structural parameter of the membrane. Results demonstrated that the increase in all parameters, except structural parameter of the membrane and the length of module led to the increase of average water flux. Moreover, nine different draw solutes were selected in order to assess the influence of net bulk osmotic pressure difference between the draw solution(DS) and feed solution(FS)(known as the driving force of FO process) on water flux. Based on the findings of this paper, the performance of FO process(PRO mode) can be efficiently evaluated using the NetL ogo platform.

关键词： Agent-based model forward osmosis (PRO mode) Membranes Net Logo platform Simulation Water flux

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

From golden rice to a STARice, more than just two steps forward in a pathway

引用

Science China(Life Sciences) 2019年第2期62卷 280-281页

作者： Wei-Cai Chen Shan Lu State Key Laboratory of Pharmaceutical Biotechnology School of Life Sciences Nanjing University

Carotenoids are widely distributed in higher plants, algae and some bacteria and fungi. For human beings, they are essential phytonutrients that serve not only as precursors of vitamin A.

关键词： From golden rice to a STARice more than just two steps forward in a pathway

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

Investigation on removing recalcitrant toxic organic polluters in coking wastewater by forward osmosis

引用

Chinese Journal of Chemical Engineering 2020年第1期28卷 122-135页

作者： Zhiqiang Li Lanying Jiang Chongjian Tang School of Metallurgy and Environment Central South UniversityChangsha 410000China National Engineering Research Center for Control&Treatment of Heavy Metal Pollution Changsha 410000China Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety Changsha 410000China

Investigation was made on the efficiency of two commercial membranes in removing via forward osmosis(FO)the low molecular weight organic compounds typical of coking wastewater. The membranes were supplied by Poten and HTI companies. The organics in the simulated coking water were indole and pyrridine. Under FO mode, the rejection to the organics by Poten membrane was around 50%, whereas that for HTI membrane was obviously higher, ranging from 65% to 74%. The response of the two membranes in terms of Water flux and reverse salt flux(RSF) towards changing feed/draw solution(DS) flow rates in FO mode showed similar tendency,but different degree. Generally, the flux in FO using HTI membranes was lower. For HTI membrane, FO operated with pressure retarded osmosis(PRO) mode was also performed and the overall rejection of the organics was slightly lower than that in FO mode. In the long term FO test within 15 days, both Poten and HTI membranes displayed flux reduction and rejection enhancement. But the variation with Poten membrane was much more obvious. Discussion was carried out about the reasons and the mechanisms behind the FO performance difference between two membranes and the variation in flux and rejection with operation conditions. Characterizations by SEM, FTIR, AFM, XRD and XPS were tried to support the proposed explanations.

关键词： Coke wastewater Organics rejection forward osmosis Water flux Reverse salt flux

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

Effects of hurricane forward speed and approach angle on storm surges: an idealized numerical experiment

引用

Acta Oceanologica Sinica 2019年第7期38卷 48-56页

作者： Chenguang Zhang Chunyan Li Department of Oceanography and Coastal Sciences Louisiana State University

The effects of hurricane forward speed(V)and approach angle(θ)on storm surge are important and a systematic investigation covering possible and continuous ranges of these parameters has not been done before.Here we present such a study with a numerical experiment using the Finite Volume Community Ocean Model(FVCOM).The hurricane track is simplified as a straight line,such that V andθfully define the motion of the hurricane.The maximum surge is contributed by both free waves and a forced storm surge wave moving with the hurricane.Among the free waves,Kelvin-type waves can only propagate in the down-coast direction.Simulations show that those waves can only have a significant positive storm surge when the hurricane velocity has a down-coast component.The optimal values of V andθthat maximize the storm surge in an idealized semi-circular ocean basin are functions of the bathymetry.For a constant bathymetry,the maximum surge occurs when the hurricane approaches the coast from the normal direction when the free wave generation is minimal;for a stepped bathymetry,the maximum surge occurs at a certain acute approach angle which maximizes the duration of persistent wind forcing;a step-like bathymetry with a sloped shelf is similar to the stepped bathymetry,with the added possibility of landfall resonance when the free and forced waves are moving at about the same velocity.For other cases,the storm surge is smaller,given other parameters(hurricane size,maximum wind speed,etc.)unchanged.

关键词： storm surge experiments FVCOM hurricane forward speed approach angle Kelvin waves forced and free surge interactions

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

Simultaneous Localization and Mapping of Autonomous Underwater Vehicle Using Looking forward Sonar

引用

Journal of Shanghai Jiaotong university(Science) 2012年第1期17卷 91-97页

作者：曾文静万磊张铁栋黄蜀玲 State Key Laboratory of Autonomous Underwater Vehicle Harbin Engineering University

A method of underwater simultaneous localization and mapping(SLAM)based on on-board looking forward sonar is proposed.The real-time data flow is obtained to form the underwater acoustic images and these images are pre-processed and positions of objects are extracted for SLAM.Extended Kalman filter(EKF)is selected as the kernel approach to enable the underwater vehicle to construct a feature map,and the EKF can locate the underwater vehicle through the map.In order to improve the association effciency,a novel association method based on ant colony algorithm is introduced.Results obtained on simulation data and real acoustic vision data in tank are displayed and discussed.The proposed method maintains better association effciency and reduces navigation error,and is effective and feasible.

关键词： simultaneous localization and mapping(SLAM) autonomous underwater vehicle(AUV) looking forward sonar extended Kalman filter(EKF)

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

forward:Proceedings of the 2008 Ecological and Evolutionary Ethology of Fishes Conference,Boston,Massachusetts,USA

引用

Current Zoology 2010年第1期56卷 3-4页

作者： Maria E.ABATE Department of Biology Boston University

This special issue of Current Zoology concerning thebehavior, ecology, and evolution of fishes is comprisedof the peer-reviewed Proceedings of the 2008 Ecologicaland Evolutionary Ecology of Fishes Biennial Conferencethat was held June 29-July 3 at Boston University,Boston, Massachusetts, USA. The conferenceand its four symposia were organized by a local organi-

关键词： forward

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

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：