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Developing a web-based spatial decision support system for geothermal exploration at the Olkaria geothermal field

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International Journal of Digital Earth 2017年第11期10卷 1118-1145页

作者： Daniel Mwaur Martin kad Institute of Geodesy and Geoinformation Science Technische Universität BerlinBerlinGermany

Geothermal exploration is a complex process that spans a number of *** a decision is made to drill a geothermal well,there is need for an extensive exploration process to determine the most suitable *** process of evaluating and analyzing data from individual scientific disciplines can be complex and *** have been made at solving this problem using GIS-based tools but the uptake of these tools is often hindered by the limited knowledge of GIS by decision *** paper presents an approach for solving the geothermal exploration question through a web-based spatial decision support system(SDSS)that incorporates the various geosciences through a multi-criteria spatial decision analysis *** results reveal a decision-making gap that is to be filled using a novel,automated exploration *** approach hypothesizes an easier and faster decision-making *** research focuses on Olkaria,an active geothermal area in Kenya,East Africa and highlights a pragmatic approach to identifying priority areas for *** evaluates contributions made by many disciplines in identifying potential sites ideal for harnessing geothermal energy and the gaps that emerge in an effort to synergize the results from the different disciplines.

关键词： GIS SDSS geothermal web based multi-criteria decision analysis

Efects of Die Corner Radius and Temperature on the Formability of AA7075-T6 Alloy

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Acta Metallurgica Sinica(English Letters) 2013年第5期26卷 623-629页

作者： Hatice Evlen brahim kad Mustafa Ya sar Technology Faculty Karabuk University

This study focused on the formability of aluminium alloy（7075-T6） sheets through hydroforming route. Formability of these sheets was tested using a warm forming setup at three diferent temperatures and four diferent die corner radii. Forming limit diagrams（FLD） were generated by measuring the grids of the sheet formed. The results show that the forming limit of AA7075-T6 can be significantly improved when the blank was heated to 140–250℃. It was also observed that as the temperature increases above 140℃, dome height began to decrease. Also the results indicated that both the die corner radius and temperature have a significant efect on the stress-strain curve and warm forming of AA7075-T6 sheets. Thus, with the temperature increased from room temperature（RT） to 140℃, the flow stress decreased and the strain increased, hence, the formability is enhanced. However, further increase in temperature causes decreases the flow stress and strain. Similar changes of the flow curve were seen in die corner radius. Decreasing the die corner radius decreases the flow stress and increase the strain. Moreover, an equation was obtained by establishing correlations between the experimental parameters and their results. In this way, it became possible to make predictions.

关键词： Al-Zn-Mg-Cu Alloy Drawing process Formability Forming limit curve Deformation

Spring Inserts for the Intensification of the Heat Exchange Process during Boiling in Vertical Tubes--Optimization of Geometric Parameters

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Journal of Thermal Science 2018年第5期27卷 440-448页

作者： NIEZGODA-ZELASKO beata Faculty of Mechanical Engineering Institute of Thermal and Process Engineering Cracow University of Technology31-864 Cracow Poland

The paper presents new criteria for calculation of heat transfer coefficients and flow resistance during boiling inside vertical tubes with spring inserts, developed on the basis of own experimental research. Calculations of the geometric parameters of the spring insert were carried out using the Nelder-Mead optimization method for various optimization criteria(maximizing the increase ratios for heat transfer coefficient and flow resistance, minimizing entropy, own optimization criterion). The results of optimization calculations were verified by the optimization procedures available in Statistica.

关键词： boiling heat transfer flow resistance spring inserts optimization

Taxonomic revision of the Calamagrostis epigeios complex with particular reference to China

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Journal of Systematics and Evolution 2011年第5期49卷 495-504页

作者： beata PASZKO Haiying MA Wadysaw Szafer Institute of Botany Polish Academy of Sciences School of Life Sciences Yunnan University

Principal component analysis of specimen measurements revealed morphological variation within Chinese Calamagrostis epigeios correlated with differences in geographical *** conducted a morphological examination of specimens from the range of the species,with the goal of developing a treatment for its Chinese members reflecting the global diversity *** confusing taxonomy of this complex is clarified with the recognition of three species in China,namely ***,***,and *** epigeios is an exclusively temperate grass occurring in the northwestern,northern,and northeastern parts of *** has spikelets 4-7 mm long,glumes equal or subequal,awn arising near the middle of the lemma back,upper leaf surface smooth and with shallow ribs and *** extremiorientalis is a tropical and subtropical grass that occurs in the southwest provinces of China(except Xizang) throughout south central provinces and east to the northeastern parts of *** is morphologically similar to ***,*** has the awn arising from the upper one-third of the lemma back,upper leaf surface scabrid because of the presence of short stiff hairs,and with tall ribs and deep *** macrolepis occurs in the northwestern,northern,and northeastern parts of *** has a robust habit,spikelets 6.5-11 mm long,and glumes unequal,the upper 1-1.5 mm shorter than the *** synonyms,descriptions,and citations of representative specimens are provided for each species,along with an identification key.

关键词： Calamagrostis extremiorientalis Calamagrostis macrolepis Calamagrostis epigeios China new synonym Poaceae taxonomy.

Modeling of Thermal Properties of Thermal Insulation Layered with Transparent,Opaque and Reflective Film

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Journal of Thermal Science 2018年第5期27卷 463-469页

作者： GRABOWSKA beata KASPERSKI Jacek Faculty of Mechanical and Power Engineering Wroclaw University of Science and TechnologyWroclaw 50-370 Poland

The popular and effective food preservation technology based on refrigeration is not sufficient for high-quality products while undergoing logistic operations(transport and retail). One of the basic factors that affects the quality of chilled and frozen food products during storage and transport is packaging. A protective function of packaging strongly depends on the material used and its composition. There are different kinds of thermal insulation used for food packaging. One of them, proposed by the authors is a multilayer structure of insulation made of rectangular air cells. The insulation can be prepared by means of plastic film featuring various properties. The paper presents how to improve an effective material designed for food freezing and transport aiming to enhance its thermal resistance through the application of different transparency, reflectivity and emissivity of the film. Mathematical model based on heat exchange equations, including conduction, convection and radiation throughout a number of parallel internal sheets of film of multilayer structures was proposed. Thermal properties depending on different transparency, reflectivity and emissivity of the film were analyzed. The model was verified experimentally showing its compatibility and obtaining a significant influence of thermal resistance according to the type of film used to make air structures, the number and thickness of its layers as well as the gaps between internal folds. For multi-layer insulation designed for the insulation of packed frozen food in the shape of a rectangle, it was recommended to apply film transmittance as small as possible for the internal parts of the structure.

关键词： frozen food heat transfer transparency reflectance thermal isolation food package

Synthesis of crosslinked polystyrene particles by seeded batch polymerization with monomer absorption

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Transactions of Nonferrous Metals Society of China 2011年第A1期21卷 153-159页

作者： Ki-Chang LEE Han-Ah wi Department of Polymer Science and Engineering Engineering Research Institute Gyeongsang National University

A highly crosslinked, monodispersed polystyrene（PS） particle was prepared by a seeded batch dispersion polymerization with a monomer absorption method. Prior to polymerization, 1,9 lam monodispersed PS seed particles were treated under an optimum condition of monomer absorption. The effects of divinylbenzebe（DVB） concentration and polymerization temperature were examined for styrene（in PS seed）/styrene（in the second stage） mass ratio of 1：1 in the medium range of EtOH/water mass ratio of 100/0-80/20 and 2.3 μm uniform crosslinked PS particles containing 15%-20% （mass fraction） DVB were prepared at 60-70 ℃. The results show that monomer absorption before the second stage of polymerization is more effective to prepare highly crosslinked monodispersed PS particles.

关键词： crosslinked polystyrene particle seeded batch dispersion polymerization monomer absorption divinylbenzene (DVB)

Computer simulation of the coagulation of suspended solids——The applicability of the Müller–Smoluchowski theory

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Journal of Environmental Sciences 2016年第6期28卷 197-203页

作者： Regina Wardzynska beata Zaleska-Chróst Department of Chemistry University of Warmia and Mazury in Olsztyn

The results of studies carried out using a computer programme simulating the coagulation of suspensions containing spherical sol particles and spherical coagulant particles are *** influence of the degree of dispersion of the system on the coagulation reaction kinetics was investigated. The obtained results of kinetic studies were tested in the light of classical Müller–Smoluchowski equations. The influence of the physical properties of the coagulant,such as size, density and mass, on the coagulation rate was tested. It was found that within the range described in this paper, the rate of the simulated coagulation process fulfils both the kinetic equation of a first-order reaction, and the kinetic equation of a second-order *** the tested range, a significant influence of the mass and size of the coagulant on the coagulation rate was ascertained. The kinetic Müller–Smoluchowski dependence is fulfilled in a broader range of the degree of dispersion, when the coagulant particle mass and the sol particle mass are equal. When the particle mass increases with an increase in the particle radius, the coagulation rate increases faster that it would result from the Müller＇s dependence.

关键词： Aggregation Computer simulation Coagulation rate Sol

OPTIMAL ERROR ESTIMATES OF A DECOUPLED SCHEME BASED ON TWO-GRID FINITE ELEMENT FOR MIXED NAVIER-STOKES/DARCY MODEL

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Acta Mathematica Scientia 2018年第4期38卷 1361-1369页

作者： wi QIN Wanren HOU School of Mathematics and Statistics Xi＇an Jiaotong UniversityXi＇an 710049China

Although the two-grid finite element decoupled scheme for mixed Navier-Stokes/ Darcy model in literatures has given the numerical results of optimal convergence order, the theoretical analysis only obtain the optimal error order for the porous media flow and a non-optimal error order for the fluid flow. In this article, we give a more rigorous of the error analysis for the fluid flow and obtain the optimal error estimates of the velocity and the pressure.

关键词： Navier-Stokes equation Darcy's law two-grid method optimal error estimate

Hepatectomy for bile duct injuries: When is it necessary?

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World Journal of Gastroenterology 2013年第38期19卷 6348-6352页

作者： beata Jablońska Department of Digestive Tract Surgery University Hospital of the Medical University of Silesia40-752 KatowicePoland

Iatrogenic bile duct injuries(IBDI)are still a challenge for *** most frequently,they are caused by laparoscopic cholecystectomy which is one of the commonest surgical procedure in the *** techniques are recommended as initial treatment of *** endoscopic treatment is not effective,surgery is *** surgical biliary reconstructions are performed in most patients in ***-Y hepaticojejunostomy is the commonest biliary reconstruction for *** some patients with complex IBDI,hepatectomy is ***,Liet al analyzed the factors that had led to hepatectomy for patients with IBDI after laparoscopic cholecystectomy(LC).Authors concluded that hepatectomy might be necessary to manage early or late complications after *** study showed that proximal IBDI(involving hepatic confluence)and IBDI associated with vascular injuries were the two independent risk factors of hepatectomy in this *** distinguished two main groups of patients that require liver resection in IBDI:those with an injury-induced liver necrosis necessitating early intervention,and those in whom liver resection is indicated for treatment of liver atrophy following long-term *** this commentary,indications for hepatectomy in patients with IBDI are *** biliovascular injuries as indications for hepatectomy are ***-and long-term results in patients following liver resection for IBDI are also *** is not a standard procedure in surgical treatment of IBDI,but in some complex injuries it should be considered.

关键词： Hepatectomy Bile duct injury Cholecystectomy Laparoscopic cholecystectomy