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Simulation of the plasticizing behavior of composite modified doublebase(CMDB)propellant in grooved calendar based on adaptive grid technology

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Defence Technology（防务技术） 2021年第6期17卷 1954-1966页

作者： su-wei wang Xiu-duo Song Zong-kai Wu Lei Xiao Guang-pu Zhang Yu-bing Hu Ga-zi Hao wei Jiang Feng-qi Zhao National Special superfine Powder Engineering Research Center of China School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing210094China Xi'an Modern Chemistry Research Institute Xi'an710065China

The frequent occurrence of safety accidents during the calendering process is caused by the flammable and explosive properties of composite modified double-base(CMDB)*** of process parameters with the aid of fluid simulation technology could effectively ensure the safety of the calendering *** improve the accuracy of the simulation results,material parameters and model structure were corrected based on actual conditions,and adaptive grid technology was applied in the local mesh *** addition,the rheological behavior,motion trajectories and heat transfer mechanisms of CMDB propellant slurry were studied with different gaps,rotational rates and temperatures of two *** results indicated that the refined mesh could significantly improve the contour clarity of boundaries and simulate the characteristics of CMDB propellant slurry reflux movement caused by the convergent flow near the *** with the gap,the increased rotational rate of roller could promote the reflux movement and intensify the shear flow of slurry inside the flow region by viscous shear ***,under the synergistic effect of contact heat transfer as well as convective heat exchange,heat accumulated near the outlet and diffused along the reflux movement,which led to the countercurrent heat dissipation behavior of CMDB propellant *** plasticizing mechanism of slurry and the safety of calendering under different conditions were explored,which provided theoretical guidance and reference data for the optimization of calendering process *** on the simulation results,the safety of the CMDB propellant calendering process could be significantly improved with a few tests conducted during a short research and development cycle.

关键词： Composite modified double base propellant Calendering process Fluid simulation Vortex flow0

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An Overall Review of the International Situation in the 2^(nd) Quarter of 2006

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International Understanding 2006年第3期 33-35页

作者： su Zuhui wang wei

1. The tendency that both mutual cooperation and restriction among major powers was getting obvious.

关键词： 2006年第二季度国际形势美国俄罗斯欧盟对外关系日本政治经济

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Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital Hybridization

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Nano-Micro Letters 2025年第1期17卷 281-292页

作者： Xing wang wei Pi Sheng Hu Haifeng Bao Na Yao wei Luo State Key Laboratory of New Textile Materials and Advanced Processing Technology Key Laboratory of New Textile Materials and Applications of Hubei ProvinceSchool of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China

Anion-exchange membrane water electrolyzers(AEMWEs)for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based *** introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units,the d-orbital and electronic structures can be adjusted,which is an important strategy to achieve sufficient oxygen evolution reaction(OER)performance in ***,the ternary NiFeM(M:La,Mo)catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this *** and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen,resulting in enhanced adsorption strength of oxygen intermediates,and reduced rate-determining step energy barrier,which is responsible for the enhanced OER *** critically,the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm^(−2) in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.

关键词： NiFe-based catalysts d-orbital coupling Oxygen evolution reaction Anion exchange membrane electrolyzer

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AI-Enhanced Secure Data Aggregation for Smart Grids with Privacy Preservation

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Computers, Materials & Continua 2025年第1期82卷 799-816页

作者： Congcong wang Chen wang Wenying Zheng wei Gu School of Software Nanjing University of Information Science and TechnologyNanjing210044China School of Information Science and Engineering Zhejiang Sci-Tech UniversityHangzhou310018China State Key Laboratory of Public Big Data Guizhou UniversityGuiyang550025China School of Computer Science and Technology(School of Artificial Intelligence) Zhejiang Sci-Tech UniversityHangzhou310018China School of Computer Science(School of Cyber Science and Engineering) Nanjing University of Information Science and TechnologyNanjing210044China

As smart grid technology rapidly advances,the vast amount of user data collected by smart meter presents significant challenges in data security and privacy *** research emphasizes data security and user privacy concerns within smart ***,existing methods struggle with efficiency and security when processing large-scale *** efficient data processing with stringent privacy protection during data aggregation in smart grids remains an urgent *** paper proposes an AI-based multi-type data aggregation method designed to enhance aggregation efficiency and security by standardizing and normalizing various data *** approach optimizes data preprocessing,integrates Long Short-Term Memory(LSTM)networks for handling time-series data,and employs homomorphic encryption to safeguard user *** also explores the application of Boneh Lynn Shacham(BLS)signatures for user *** proposed scheme’s efficiency,security,and privacy protection capabilities are validated through rigorous security proofs and experimental analysis.

关键词： Smart grid data security privacy protection artificial intelligence data aggregation

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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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具有独立子系统的MDEA-ISS模型及应用

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系统工程 2016年第12期34卷 93-97页

作者：苏伟洲汪伟林西南科技大学经济管理学院四川绵阳621010 西南交通大学经济管理学院四川成都610031

考虑到现有评价带有多个独立子系统的复杂系统相对有效性的YMK-DEA模型和C2GS2-ISS模型都存在其局限性,本文构建了MDEA-ISS模型,该模型不仅能同时处理满足锥性和不满足锥性的指标,而且也克服了单系统MDEA模型的一些不足,具有一定的实用... 详细信息

考虑到现有评价带有多个独立子系统的复杂系统相对有效性的YMK-DEA模型和C2GS2-ISS模型都存在其局限性,本文构建了MDEA-ISS模型,该模型不仅能同时处理满足锥性和不满足锥性的指标,而且也克服了单系统MDEA模型的一些不足,具有一定的实用性。最后用该模型对我国区域工业系统发展进行了实证分析。

关键词：独立子系统 YMK-DEA模型 C2GS2-ISS模型 MDEA模型 MDEA-ISS模型

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Continuous edge chromatic numbers of abelian group actions

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Science China Mathematics 2025年

作者： su Gao Ruijun wang Tianhao wang School of Mathematical Sciences and Laboratory of Pure Mathematics and Combinatorics Nankai University

We prove that for any generating set S of Z~n, the continuous edge chromatic number χ′c（G） of the Schreier graph of the Bernoulli shift action G = F(S, 2Z~n) is χ′（G） + 1 = |S| + 1. In particular, for the stan...

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基于频域超分辨的高速目标参数估计算法

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电子与信息学报 2016年第12期38卷 3034-3041页

作者：王钊王鹏毅苏卫民王玮杜冰馨中国电子科技集团公司第五十四研究所石家庄050081 南京理工大学电子工程与光电技术学院南京210094

针对宽带噪声雷达高速目标探测中参数估计性能与运算复杂度无法兼顾的问题,该文提出一种基于频域超分辨的参数估计算法。该算法通过设置不同固定时延得到多组含有不同相位信息的组合噪声调频信号,并对每组信号进行不含尺度变换的匹配滤... 详细信息

针对宽带噪声雷达高速目标探测中参数估计性能与运算复杂度无法兼顾的问题,该文提出一种基于频域超分辨的参数估计算法。该算法通过设置不同固定时延得到多组含有不同相位信息的组合噪声调频信号,并对每组信号进行不含尺度变换的匹配滤波运算,以此来构造多普勒相位差组。根据多普勒相位差组与阵列信号处理的相似性,利用现代谱估计算法得到目标的速度信息,构造多普勒补偿函数进行包含尺度变换的匹配滤波运算估计出目标的距离信息。该算法可以在无需考虑多普勒色散的情况下估计出目标速度,整个运算过程仅需1次时域重构运算;当多普勒相位差组的固定时延及分组数选择合适时,其运算复杂度及参数估计性能皆优于曲面拟合的宽带互模糊函数算法。仿真结果验证了该算法的有效性。

关键词：宽带噪声雷达多普勒色散多普勒相位差组频域超分辨

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Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie wang wei wang Xuheng Chen Junfang Bao Qiuyue Hao Heng Zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

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In situ N-doped Bi_(3)O_(4)Br/(BiO)_(2)CO_(3) ultrathin nanojunctions with matched energy band structure for nonselective photocatalysis pollutant removal

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cMat 2024年第2期1卷 80-90页

作者： Jun Di Yi-Ling Liu Yi Zhang Sha-Sha Guo su-wei wang wei Jiang Hua-Ming Li Jie-Xiang Xia School of Chemistry and Chemical Engineering National Special Superfine Powder Engineering Research CenterNanjing University of Science and TechnologyNanjingChina School of Chemistry and Chemical Engineering Institute for Energy ResearchJiangsu UniversityZhenjiangChina Department of Chemistry and Chemical Biology Cornell UniversityIthacaNew YorkUSA

Novel N-doped Bi_(3)O_(4)Br/(BiO)_(2)CO_(3) ultrathin nanojunctions have been *** dehalogenation was performed to form Bi_(3)O_(4)Br,surfactant was employed to control the ultrathin thickness,and few-layers of C_(3)N_(4) as a sacrificial agent were used to build the N-doped(BiO)_(2)CO_(3).The photocatalytic behavior of the achieved N-doped Bi_(3)O_(4)Br/(BiO)_(2)CO_(3) ultrathin nanojunctions was evaluated through the degradation of antibiotic agent ciprofloxacin,tetracycline hydro-chloride,and endocrine disrupting chemical bisphenol A as well as typical dye rhodamine B under visible light *** matched energy band structure between Bi_(3)O_(4)Br and(BiO)_(2)CO_(3) could endow the highly efficient interfacial charge separation,thus leading to excellent nonselective photocatalytic *** structure design in this system will open new windows for the reasonable design of other photocatalysts.

关键词： (BiO)_(2)CO_(3) Bi_(3)O_(4)Br heterojunction photocatalytic ultrathin

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