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Effect of Progressive Substitution of Cement and Lime by Powdered Shells Used as a Curing Agent for Dredged Soil in a Port Area

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 88-102页

作者： SUN Yang WANG Faxin SU Yaying LI Yiwei HE Feng College of Harbour Coastal and Offshore EngineeringHohai UniversityNanjing 210098China Huai'an Research Institute Hohai UniversityHuai'an 223025China Jiangsu Fangyang Industrial investment Corp.Ltd. Lianyungang 210098China

This study aimed to address the challenges of solid waste utilization,cost reduction,and carbon reduction in the treatment of deep-dredged soil at Xuwei Port in Lianyungang city of *** research in this area was ***,a curing agent made from powdered shells was used to solidify the dredged soil in *** employed laboratory orthogonal tests to investigate the physical and mechanical properties of the powdered shell-based curing *** was collected by conducting experiments to assess the role of powdered shells in the curing process and to determine the optimal ratios of powdered shells to solidified soil for different *** development of strength in solidified soil was studied in both seawater and pure water *** study revealed that the strength of the solidified soil was influenced by the substitution rate of powdered shells and their interaction with *** cement content had a positive effect on *** high-strength solidified soil,the recommended ratio of wet soil:cement:lime:powdered shells were 100:16:4:4,while for low-strength solidified soil,the recommended ratio was 100:5.4:2.4:***,under appropriate conditions,improved short-term strength by promoting the formation of expansive ettringite minerals that contributed to cementation and *** findings suggest that the combination of cement and powdered shells is synergistic,positively affecting the strength of solidified *** recommended ratios provide practical guidance for achieving desired strength levels while considering factors such as cost and carbon *** role of seawater in enhancing short-term strength through crystal formation is noteworthy and can be advantageous for certain *** conclusion,this research demonstrates the potential of using a powdered shell-based curing agent for solidifying dredged soil in an environmentally friendly and cost-effective *** recommended ratios for different str

关键词： carbon reduction and solidification dredged soil abandoned shells orthogonal test chemical additives(lime and cement) unconfined compressive strength(UCS)

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Recent advances in applications of multimodal ultrasound-guided photoacoustic imaging technology

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Visual Computing for Industry,Biomedicine,and Art 2020年第1期3卷 266-277页

作者： Shanshan Wang Yunfeng Zhao Ye Xu VisualSonics Business department FUJIFILM(China)Investment Co.Ltd.Beijing 100026China VisualSonics Business department FUJIFILM(China)Investment Co.Ltd.Shanghai 200120China

Photoacoustic imaging(PAI)is often performed simultaneously with ultrasound imaging and can provide functional and cellular information regarding the tissues in the anatomical markers of the *** paper describes in detail the basic principles of photoacoustic/ultrasound(PA/US)imaging and its application in recent *** includes near-infrared-region PA,photothermal,photodynamic,and multimode imaging *** attention is given to the relationship between PAI and ultrasonic imaging;the latest high-frequency PA/US imaging of small animals,which involves not only B-mode,but also color Doppler mode,power Doppler mode,and nonlinear imaging mode;the ultrasonic model combined with PAI,including the formation of multimodal imaging;the preclinical imaging methods;and the most effective detection methods for clinical research for the future.

关键词： Photoacoustic/ultrasound imaging The second near-infrared photoacoustic Photothermal therapy Photodynamic therapy Multi-mode imaging

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Effect of Progressive Substitution of Cement and Lime by Powdered Shells Used as a Curing Agent for Dredged Soil in a Port Area

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期 88-102页

作者：孙阳 WANG Faxin SU Yaying LI Yiwei HE Feng College of Harbour Coastal and Offshore Engineering Hohai University Huai'an Research Institute Hohai University Jiangsu Fangyang Industrial investment Corp. Ltd.

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Economic cost-benefit analysis for the agricultural use of sewage sludge treated with lime and fly ash

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International Journal of Coal Science & Technology 2021年第5期8卷 1099-1107页

作者： Efrat Hadas Uri Mingelgrin Pinchas Fine investment financing department Ministry of Agriculture and Rural Development68 Hamakabim RoadP.O.Box 151597505101 Rishon LeZionIsrael Agricultural Research Organization Volcani CenterInstitute of SoilsWater and Environmental Sciences68 Hamakabim RoadP.O.Box 151597505101 Rishon LeZionIsrael

A tool for calculating the economic and environmental impacts of the use of byproducts of industrial processes that can substitute for perishable resources was *** was exemplified by fly ash(the fine fraction of ash originating from coal burned to generate electricity and collected by filtering exhaust gases leaving the furnace),added to soil as a component of sewage sludge stabilized with fly ash and lime(NVS).Application to soil of NVS has potential agricultural and environmental advantages and *** costs and benefits of such application were calculated using both a database and expert *** calculations assumed a representative assemblage of soils and crops,with weights assigned to each crop type and soil *** annual weighted benefits(additional income for the farmer)and costs per hectare reached 324$/ha and 131$/ha *** potential benefits include:Chemical fertilizer replacement,159$/ha;Improvement to the soil’s physical properties,75$/ha;Supply of vital trace elements,33$/*** potential costs were:Regulatory limitations on marketing of crops pending proof of absence of risk of heavy metals or radionuclides accumulation in these crops,(17$/ha and 36$/ha respectively);Application and incorporation cost,50$/*** presented estimates of the costs and benefits refer to the array of soils and conditions typical to *** is possible to maximize potential benefits by applying fly ash only to the most suitable agricultural soils while improper use of fly ash will increase the costs incurred from its use.

关键词： Byproducts recycling Cost-benefit analysis Fly ash Liming Sewage sludge

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The Convergence of Set-Valued Scenario Approach for Downside Risk Minimization

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Journal of Systems Science & Complexity 2016年第3期29卷 722-735页

作者： JI Xiaodong ZHU Shushang department of Economics College of BusinessHebei Normal University department of Finance and investment Sun Yat-Sen Business SchoolSun Yat-Sen University

Scenario approach is a widely used tool in portfolio risk management,however,it often runs into dilemma when determining the distribution of asset returns with insufficient information,which will be used to simulate the *** the quality of generated scenarios are not guaranteed even when the distribution of asset returns is known exactly.A set-valued scenario approach was proposed by Zhu,et al.(2015)as a possible *** a necessary supplement of the results proposed by Zhu,et al.(2015),this paper theoretically investigates the convergent property of the numerical solution based on the set-valued scenario approach under the condition that the underlying distribution is known.

关键词： Convergence downside risk portfolio risk management set-valued scenarios.

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Model of interval multi-attribute optimization for overseas oil-gas projects

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Petroleum Science 2015年第2期12卷 345-354页

作者： Yong-Zhang Huang Bao-Sheng Zhang Xin-Qiang Wei Ren-Jin Sun School of Business Administration China University of Petroleum Overseas investment Environment Research department CNPC Economics and Technology Research Institute

Because of the incompleteness and uncertainty in the information on overseas oil-gas projects, project evaluation needs models able to deal with such problems. A new model is, therefore, presented in this paper based on interval multi-attribute decision-making theory. Analysis was made on the important attributes （index） and the re- lationships affecting the basic factors to the project eco- nomic results were described. The interval numbers are used to describe the information on overseas oil and gas projects. On these bases, an improved TOPSIS model is introduced for the evaluation and ranking of overseas oil and gas projects. The practical application of the new model was carried out for an oil company in selecting some promising blocks from 13 oil and gas blocks in eight dif- ferent countries in the Middle East. Based on these inno- vative studies, some conclusions are given from theoretical and application aspects. The practical application shows that the introduction of interval numbers into the evaluation and ranking of the overseas oil and gas projects can lead to more reasonable decisions. The users can do the project evaluation based on the comprehensive values as well as based on some preferred index in the project evaluation and ranking.

关键词： Interval data Improved TOPSIS modelMultiple attribute decision making Overseas oil-gasproject Alternative ranking

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Reaction between Ti–6Al–4V and Y_2O_3–SiO_2 based face shell for investment casting

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Rare Metals 2016年第12期35卷 901-908页

作者： Ya-Meng Wei Zhi-Gang Lu Guang-Peng Wu Xing-Quan Long department of Mechanical Engineering Tsinghua University State Key Laboratory of Tribology Tsinghua University Guizhou Anji Aviation investment Casting Co. Ltd.

The pH value and viscosity of Y2O3-SiO2 （Y-Si） slurry made by Y2O3 powders and silica sol for the face coat of Ti-6Al-4V investment casting were measured. The thermal behavior of the shell made by the Y-Si face coat system was investigated by differential scanning calorimeter （DSC）, thermal gravimetric （TG） analysis combined with mass spectrometry （MS）, and the phase transformations were determined by X-ray diffraction （XRD）. Hot strength, residual strength, linear expansion coefficient, and wearing resistance performance of the shell were also tested. The microstructure and elements distri- bution of the interaction layer were studied by scanning electron microscope （SEM） and energy-dispersive spectrometer （EDS）, respectively. The microhardness tester was applied for the microhardness. The results showed that the slurry was stable for at least 60 h. A very small amount of YZrO3 was formed below 1050℃ and Y2SiO5 was formed around 1450℃. The shell made by Y-Si system had good mechanical property which could reduce cracks during the procedure of dewaxing and inclusions during pouring. Some Al volatilized from the melt, permeated the surface of the face coat shell, and formed the black reaction layer, which blocked the permeation of O so that O penetration was limited to 5μm. The depth of Si penetration was about 60 μm. The hard layer was also around 60 μm.

关键词： investment casting Titanium alloy Silica sol Yttrium oxide Interface reaction

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China's Stock Market:Inefficiencies and Institutional Implications

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China & World Economy 2008年第6期16卷 81-96页

作者： Guoping Li Assistant Professor Investment Department Central University of Finance and Economics Beijing China

The dramatic movements of China＇s stock market in the past two and a half years have renewed debate among academics over the efficiency of China＇s stock market. The present paper tests the efficiency of China＇ s stock market. The realization of efficient markets requires the effective operation of a complete set of macro and micro mechanisms. However, such mechanisms are not only incomplete in China＇ s stock market, but are also ineffective because of the prevalence of institutional deficiencies.

关键词： China's stock market efficient market short sale

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Application of homogenization techniques for inflow transport approximation on light water reactor analysis

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Nuclear Science and Techniques 2022年第1期33卷 67-80页

作者： Xiang Xiao Kan Wang Tong-Rui Yang Yi-Xue Chen department of Engineering Physics Tsinghua UniversityBeijing 100084China State Power investment Corporation Research Institute Co.LtdBeijing 100029China

The transport cross-section based on inflow transport approximation can significantly improve the accuracy of light water reactor(LWR)analysis,especially for the treatment of the anisotropic scattering *** previous inflow transport approximation is based on the moderator cross-section and normalized fission source,which is approximated using transport *** the accuracy of reactivity is increased,the P0 flux moment has a large error in the Monte Carlo *** this study,an improved inflow transport approximation was introduced with homogenization techniques,applying the homogenized cross-section and accurate fission *** numerical results indicated that the improved inflow transport approximation can increase the P0 flux moment accuracy and maintain the reactivity calculation precision with the previous inflow transport approximation in typical LWR *** addition to this investigation,the improved inflow transport approximation is related to the temperature *** improved inflow transport approximation is flexible and accurate in the treatment of the anisotropic scattering effect,which can be directly used in the temperature-dependent nuclear data library.

关键词： Inflow transport approximation Anisotropic scattering effect Homogenization techniques Light water reactor

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Improving the sintering performance of blends containing Canadian specularite concentrate by modifying the binding medium

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International Journal of Minerals,Metallurgy and Materials 2018年第6期25卷 598-608页

作者： Feng Zhang De-qing Zhu Jian Pan Ya-ping Mo Zheng-qi Guo School of Minerals Processing and Bioengineering Central South University Changsha 410083 China investment Management department of Wuhan Iron and Steel Company Limited Wuhan 430083 China

Canadian specularite concentrate（CSC） possesses high total iron grade and low impurity content. However, due to the poor granulating performance and weak reactivity of CSC at high temperature, the proportion of CSC used in sintering blends is restricted. In this research, the effects of fine limonite, slake lime, and bentonite particles on the granulation performance of blends containing a high ratio of CSC were studied through granulation test. Based on the test results, the effects of modification of the binding medium on the sintering performance of blends containing a high ratio of CSC were revealed by the sintering pot test. Both the granulation property and sintering performance of blends with a high proportion of CSC were improved by modifying the binding medium.

关键词： iron ore binding medium specula^ite concentrate sintering performance

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