检索结果-南通市图书馆

Heavy Metal Adsorption Properties of marine Algae Durvilliea Potatorum,Ecklonia Radiata and Laminaria Japonica

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

Chinese Journal of Chemical Engineering 1998年第1期6卷 72-76页

作者：虞启明 jose T.Matheickal Jozef Latten School of Environmental Engineering Griffith University

1 INTRODUCTIONBiosorption of heavy metals using biosorbents derived from suitable biomass is a new tech-nology for the removal and recovery of heavy metals from industrial waste *** ad-vantages of the biosorption technology include rapid reduction of dissolved heavy metal ionsconcentration to 10-6and 10-9levels,use of inexpensive and non-hazardous biosorbents,useof existing adsorption process equipment and therefore low operating costs,high uptake ca-pacity and specificity for selective heavy metal removals,and low interference from

关键词： biosorption heavy metal removal marine algae

Bioleaching of zinc from gold ores using Acidithiobacillus ferrooxidans

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2009年第4期16卷 368-374页

作者： Pakawadee Kaewkannetra Francisco jose Garcia-Garcia Tze Yen Chiu Department of Biotechnology Faculty of TechnologyKhon Kaen University Corrosion and Protection Centre School of MaterialsThe University of Manchester Centre of Water Science Cranfield University

The present work investigated microbial leaching of zinc from ore using Acidithiobacillus ferrooxidans （ATCC 14859）. The ore samples, consisted of 13wt% zinc, were obtained from a gold mine in north-eastern Thailand. A shake flask study was performed on the ore samples using a rotary shaker under the following fixed conditions （250 r·min^-1, 30℃ for 16 d）. The influence of various conditions, namely medium type （with and without iron）, particle ore size （〈20, 20-40, 40-60, 60-100, and 〉100 mesh）, ore density （20 kg·m^-3, 50 kg·m^-3, and 100 kg·m^-3）, and pH of the medium （2, 2.5, 2.8, and 3）, were investigated. The microbial leaching was assessed by determining the concentration of zinc in the medium and compared with the initial sample concentration. The results show that Acidithiobacillus ferrooxidans can successfully leach zinc by as much as 6 times compared with the control experiment （without Acidithiobacillus ferrooxidans ferrooxidans）. The maximum efficiency （92.3%） for microbial leaching is obtained in iron-containing medium, 20-40 mesh ore sizes, 20 kg·m^-3 ore density at pH 2.8, and the zinc content is found in the medium at about 120 mg·m^-1.

关键词： bioleaching Acidithiobacillusferrooxidans gold ores gold mine

Contributions to data transmission at critical moments on unmanned aerial vehicles

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2023年第8期36卷 247-257页

作者： jose Enrique RODRIGUEZ David SEGURADO Manuel SANCHEZ jose Javier MARTINEZ Rafael GONZALEZ National Institute of Aerospace Technology Madrid 28850Spain Department of Computer Science University of AlcalaAlcala de HenaresMadrid 28054Spain

As for unmanned aircraft, the knowledge of the aircraft performance is directly related with the navigation, guidance, and control system programming. Therefore, the measured data in each phase of the flight must be sufficiently precise to obtain a good characterization of *** article proposes new methods of sending information to ground, which make it possible to know the aircraft behavior accurately, and for this purpose, four contributions have been made for ALO(Avión Ligero de Observación, Spanish acronym for Light Observation Aircraft). Currently, the characterization is based on data obtained at ten samples per second, insufficient to acquire detailed knowledge of what happened during the whole flight of an aircraft. As a result of these contributions, many more samples per second of accelerations and angular velocities are obtained at the most critical moments of the flight, such as takeoff or landing. Among the improvements included are data compression techniques, providing references to locate the measured data in time and identifying labels of each parameter.

关键词： Critical moments Data transmission Datacompression tech-niques Radio-modem Recommended Standard 232(RS-232) Unmannedaerial vehicle

Machine Learning-Based Radio Access Technology Selection in the Internet of Moving Things

在线全文

学校读者我要写书评

暂无评论

China Communications 2021年第7期18卷 13-24页

作者： Ramon Sanchez-Iborra Luis Bernal-Escobedo jose Santa Dept.Engineering and Applied Techniques University Centre of Defence at the Spanish Air Force Academy30729 San JavierSpain Dept.Information and Communication Engineering University of Murcia30100 MurciaSpain Dept.of Electronics Computing Technology and ProjectsTechnical University of Cartagena30202 CartagenaSpain

The Internet of Moving Things(IoMT)takes a step further with respect to traditional static IoT *** this line,the integration of new eco-friendly mobility devices such as scooters or bicycles within the Cooperative-Intelligent Transportation Systems(C-ITS)and smart city ecosystems is crucial to provide novel *** this end,a range of communication technologies is available,such as cellular,vehicular WiFi or Low-Power Wide-Area Network(LPWAN);however,none of them can fully cover energy consumption and Quality of Service(QoS)***,we propose a Decision Support System(DSS),based on supervised Machine Learning(ML)classification,for selecting the most adequate transmission interface to send a certain message in a multi-Radio Access Technology(RAT)set *** ML algorithms have been explored taking into account computing and energy constraints of IoMT enddevices and traffic ***,a real implementation of a decision tree-based DSS for micro-controller units is presented and *** attained results demonstrate the validity of the proposal,saving energy in communication tasks as well as satisfying QoS requirements of certain urgent *** footprint of the real implementation on an Arduino Uno is 444 bytes and it can be executed in around 50µs.

关键词： internet of moving things multi-RAT CITS classification personal mobility

Fuzzy C-means Rule Generation for Fuzzy Entry Temperature Prediction in a Hot Strip Mill

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2016年第2期23卷 116-123页

作者： jose Angel BARRIOS Cesar VILLANUEVA Alberto CAVAZOS Rafael COLAS Mechanical and Electrical Engineering Faculty Autonomous University of Nuevo LeonSan Nicolas de los Garza 66451Nuevo LeonMexico Hot Rolling Department Ternium ChurubuscoMonterrey 64000Nuevo LeonMexico

Variable estimation for finishing mill set-up in hot rolling is greatly affected by measurement uncertainties, variations in the incoming bar conditions and product changes. The fuzzy C-means algorithm was evaluated for rule base generation for fuzzy and fuzzy grey-box temperature estimation. Experimental data were collected from a real- life mill and three different sets were randomly drawn. The first set was used for rule-generation, the second set was used for training those systems with learning capabilities, while the third one was used for validation. The perform- ance of the developed systems was evaluated by five performance measures applied over the prediction error with the validation set and was compared with that of the empirical rule-base fuzzy systems and the physical model used in plant. The results show that the fuzzy C-means generated rule-bases improve temperature estimation; however, the best results are obtained when fuzzy C-means algorithm, grey-box modeling and learning functions are combined. Application of fuzzy C-means rule generation brings improvement on performance of up to 72%.

关键词： gray-box modeling ANFIS hot rolling temperature estimation fuzzy C-means rule base generation

Epidemiology regarding penile prosthetic surgery

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2020年第1期22卷 2-7页

作者： jose A Saavedra-Belaunde Jonathan Clavell-Hernandez Run Wang Department of Surgery/Division of Urology University of Texas Medical Science Center at HoustonHoustonTX 77030USA St.joseph's Medical Center HoustonTX 77002USA

With the onset of a metabolic syndrome epidemic and the increasing life expectancy,erectile dysfunction(ED)has become a more common *** incidence and prevalence increase,the medical field is focused on providing more appropriate *** is common knowledge that ED is a chronic condition that is also associated with a myriad of other *** such as aging,diabetes mellitus,hypertension,obesity,prostatic hypertrophy,and prostate cancer,among others,have a direct implication on the onset and progression of *** and recognition of risk factors may help clinicians recognize and properly treat patients suffering from *** of the most reliable treatments for ED is penile prosthetic *** the introduction of the penile prosthesis(PP)in the early seventies,this surgical procedure has improved the lives of thousands of men,with reliable and satisfactory *** aim of this review article is to characterize the epidemiology of men undergoing penile prosthetic surgery,with a discussion about the most common conditions involved in the development of ED,and that ultimately drive patients into electing to undergo PP placement.

关键词： erectile dysfunction penile prosthesis prosthetic surgery

Determining indoor air quality and identifying the origin of odour episodes in indoor environments

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

Journal of Environmental Sciences 2009年第3期21卷 333-339页

作者： Eva Gallego Xavier Roca jose Francisco Perales Xavier Guardino Environmental Centre Laboratory Polytechnic University of Catalonia (LCMA-UPC) Avda Diagonal 647 E 08028 Barcelona Spain National Centre of Work Conditions (INSHT) Dulcet 2-10 E 08034 Barcelona Spain

A methodology for identifying volatile organic compounds （VOCs） and determining air quality of indoor air has been developed. The air samples are collected using pump samplers by the inhabitants when they perceive odorous and/or discomfort episodes. Glass multi-sorbent tubes are connected to the pump samplers for the retention of VOC. The analysis is performed by automatic thermal desorption （ATD） coupled with gas chromatography-mass spectrometry （GC/MS）. This methodology can be applied in cases of sick building syndrome （SBS） evaluation, in which building occupants experience a series of varied symptoms that appear to be linked to time spent in the building. Chemical pollutants concentrations （e.g., VOC） have been described to contribute to SBS. To exemplify the methodology, a qualitative determination and an evaluation of existing VOC were performed in a dwelling where the occupants experienced the SBS symptoms. Higher total VOC （TVOC） levels were detected during episodes in indoor air （1.33 ±1.53 mg/m^3） compared to outdoor air （0.71± 0.46 mg/m^3）. The concentrations of individual VOCs, such as ethanol, acetone, isopropanol, 1-butanol, acetic acid, acetonitrile and 1-methoxy-2-propanol, were also higher than the expected for a standard dwelling. The external source of VOC was found to be an undeclared activity of storage and manipulation of solvents located at the bottom of a contiguous building.

关键词： indoor air thermal desorption TVOC VOC sick building syndrome

Regional- to local-scale controls on waterfalls in Rocky Mountain National Park,Colorado

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2020年第8期17卷 1874-1890页

作者： jose A.ORTEGA-BECERRIL Bridget LIVERS Ellen WOHL Department of Geology and Geochemistry Autonomous University of MadridMadrid.28049Spain Department of Natural Resource Ecology and Management Iowa State UniversityAmesLA 50011 USA Department of Geosciences Colorado State UniversityFort CollinsCO 80523-1482USA

Previous work on the eastern side of Rocky Mountain National Park(RMNP),Colorado indicated correlations among waterfall location,waterfall morphology,and the characteristics of bedrock *** of waterfalls on the western side of the national park do not correlate as strongly with joint *** river profiles on the western side are less concave and waterfalls account for a greater proportion of the total elevation *** interpret these differences to result from more widely spaced joints,lithological differences,and complex glacial *** results demonstrate that waterfall shape and typology may change due to both local and regional controls operating in a mountain *** regions had alpine valley glaciers,but continued landscape evolution via fluvial erosion has developed waterfalls with diverse locations and morphologies that reflect the influences of glacial deposits,bedrock erosional resistance,and joint geometry.

关键词： Waterfall Rocky Mountain National Park Knickpoint Bedrock Mountain stream regional-scale controls

Survival after pulmonary metastasectomy in colorectal cancer patients:does a history of resected liver metastases worsen the prognosis?A literature review

在线全文

学校读者我要写书评

暂无评论

Cancer Biology & Medicine 2017年第3期14卷 281-286页

作者： Jon Zabaleta Borja Aguinagalde Iker Lopez Arantza Fernandez-Monge jose M.Izquierdo jose I.Emparanza Thoracic surgery service Hospital UniversitarioDonostiaGipuzkoa 20014Spain

Objective: To assess the impact of past liver metastases on the survival duration of patients who are undergoing surgery for lung ***: We conducted a review of literature published from 2007 to 2014. The studies were identified by searching Pub Med,MEDLINE, and Embase and were supplemented by a manual search of the references listed by the retrieved studies. The following search terms were used: lung metastasectomy, pulmonary metastasectomy, lung metastases, and lung metastasis. We selected retrospective and prospective studies published from 2007 to 2014 on patients with lung metastases from colorectal cancer and were undergoing surgery with curative intent. We excluded reviews, studies that focused on surgical techniques, patients who were treated non-surgically, analyses of specific subgroups of patients, and those that did not report follow-up of the patients undergoing ***: We identified 28 papers that assessed survival after lung metastases, 21 of which were mostly retrospective studies that identified previous liver metastases to explore their impact on patient survival. In more than half of the papers analyzed(63.2%),patients with a history of resected liver metastases had a lower survival rate than those who did not have such a history, and the difference was statistically significant in eight of these studies. However, data were presented differently, and authors reported mean survival time, survival rates, or hazard ***: A history of liver metastases seems to be a negative prognostic factor, but the individual data need to undergo a meta-analysis.

关键词： Lung metastasis liver colorectal cancer review