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Water Stability Improvement of Acid Fine Aggregate-Based Asphalt Concrete

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Fluid Dynamics & Materials Processing 2023年第8期19卷 2171-2180页

作者： Yihan Sun Lihua Chu yudong cheng Fengxia Chi Chenchen Zhang Pengcheng Sun Zhejiang Scientific Research Institute of Transport Hangzhou310023China Zhejiang Key Laboratory of Road and Bridge Detection and Maintenance Technology Hangzhou310023China Huzhou Administration of Highway and Transportation Huzhou313000China China University of Geosciences(Wuhan) Wuhan430074China

In general,acid aggregates are not used in combination with asphalt concrete because of their poor compatibility with the asphalt binder,which typically results in a scarce water stability of the *** the present study,the feasibility of a new approach based on the combination of acid granite fine aggregate with alkaline limestone coarse aggregate and Portland cement filler has been *** mineral and chemical compositions of these three materials have first been analyzed and ***,the effect of different amounts of Portland cement(0%,25%,50%,75%and 100%of the total filler by weight)on the mechanical performance and water stability of the asphalt concrete has been *** concrete has been designed by using the Marshall method,and the mechanical performance indexes of this material,including the Marshall stability and indirect tensile strength(ITS),have been measured together with the related water stability indexes(namely the Marshall stability(RMS)and tensile strength ratio(TSR)).The results indicate that the alkaline limestone coarse aggregate and Portland cement filler can balance the drawback caused by the acid granite fine *** asphalt concrete has good mechanical performances and water stability when the amount of common limestone powder filler replaced by cement is not less than 75%.

关键词： Limestone granite portland cement asphalt concrete mechanical performance water stability

Homogenous coating of Li^(+)conductive Li_(5)AlO_(4)on single-crystalline nonstoichiometric Li_(1.04)Ni_(0.92)Al_(0.04)O_(2)for rechargeable lithium-ion batteries

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Journal of Energy Chemistry 2024年第8期95卷 651-659,I0014页

作者： Guoyu Ding Shizhou Wang Jinhan Li Ziyan Wu Jiayu Chen Jiayong Du Xinhui Huang Kuiming Liu yudong Zhang Zhonghan Wu Yiyang Peng Qiancheng Zhao Meng Yu Fangyi cheng Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Engineering Research Center of High-efficiency Energy Storage(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Advanced Chemical Power Sources Nankai UniversityTianjin 300071China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Cobalt-free,nickel-rich LiNi_(1-x)Al_(x)O_(2)(x≤0.1)is an attractive cathode material because of high energy density and low cost but suffers from severe structural degradation and poor rate *** this study,we propose a molten salt-assisted synthesis in combination with a Li-refeeding induced aluminum segregation strategy to prepare Li_(5)AlO_(4)-coated single-crystalline slightly Li-rich Li_(1.04)Ni_(0.92)Al_(0.04)O_(2).The symbiotic formation of Li_(5)AlO_(4)from reaction between molten lithium hydroxide and doped aluminum in the bulk ensures a high lattice matching between the Ni-rich oxide and the homogenous conductive Li_(5)AlO_(4)that permits high Li^(+)*** from mitigated undesirable side reactions and phase evolution,the Li_(5)AlO_(4)-coated single-crystalline Li_(1.04)Ni_(0.92)Al_(0.04)O_(2)delivers a high specific capacity of220.2 mA h g^(-1)at 0.1 C and considerable rate capability(182.5 mA h g^(-1)at 10 C).Besides,superior capacity retention of 90.8%is obtained at 1/3 C after 100 cycles in a 498.1 mA h pouch full ***,the particulate morphology of Li_(1.04)Ni_(0.92)Al_(0.04)O_(2)remains intact after cycling at a cutoff voltage of 4.3 V,whereas slightly Li-deficient Li_(0.98)Ni_(0.97)Al_(0.05)O_(2)features intragranular cracks and irreversible lattice *** results highlight the value of molten salt-assisted synthesis and Li-refeeding induced elemental segregation strategy to upgrade Ni-based layered oxide cathode materials for advanced Li-ion batteries.

关键词： Aluminum segregation Surface coating Nonstoichiometric oxides Molten synthesis Cathode materials

微波干燥过程中南极磷虾肉糜的传热传质及形变参数模型

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农业工程学报 2020年第3期36卷 302-312页

作者：程裕东易正凯金银哲上海海洋大学食品学院上海201306 上海海洋大学食品热加工工程中心上海201306 国家级食品科学与工程实验教学示范中心上海海洋大学上海201306

该文以南极磷虾肉糜作为媒介,基于电磁学、多相传输和固体力学变形模型研究了微波干燥仿真模型。通过在软件COMSOL Multiphysics中求解电磁方程、能量和动量守恒以及变形方程得到模拟结果。红外热成像仪用于拍摄样品表面温度分布,光纤... 详细信息

该文以南极磷虾肉糜作为媒介,基于电磁学、多相传输和固体力学变形模型研究了微波干燥仿真模型。通过在软件COMSOL Multiphysics中求解电磁方程、能量和动量守恒以及变形方程得到模拟结果。红外热成像仪用于拍摄样品表面温度分布,光纤传感器用于测定样品点的瞬时温度。经过180 s的间歇微波干燥,空间温度分布、瞬态温度曲线(RMSE=2.11℃)、含水率(干基,RMSE=0.03)和体积比与试验值有良好的一致性,说明仿真微波干燥是可行的。此外,微波模拟干燥过程中将虾肉糜视为形变材料与刚性材料,在温度和含水率方面显示了较明显的差别且前者与试验值更为接近,且未考虑收缩模型的温度和含水率的RMSE分别为9.42℃与0.08。该研究还对液态水和气体的内在渗透性(±50%)以及吸水膨胀系数(±50%)进行了敏感性分析。含水率对液态水的内在渗透性较敏感(RMSE=0.089),对气体的内在渗透性较不敏感(RMSE=0.023),体积比对吸水膨胀系数非常敏感(RMSE=0.053)。

关键词：微波干燥变形多相传输多孔介质仿真南极磷虾肉糜

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微波和巴氏杀菌后番茄汁品质动力学

农业工程学报 2010年第7期26卷 335-340页

作者：李卓思程裕东刘世雄上海海洋大学食品学院上海201306

为了解杀菌方式对番茄汁品质和货架期的影响,研究了经巴氏杀菌(85℃,4min)和微波杀菌(800W,20s)番茄汁的品质动力学,均使其加工到无菌状态,然后在不同恒温条件下(0、4、10、25、37℃)贮藏,每隔一段时间测定菌落总数、维生素C质量分数及... 详细信息

为了解杀菌方式对番茄汁品质和货架期的影响,研究了经巴氏杀菌(85℃,4min)和微波杀菌(800W,20s)番茄汁的品质动力学,均使其加工到无菌状态,然后在不同恒温条件下(0、4、10、25、37℃)贮藏,每隔一段时间测定菌落总数、维生素C质量分数及色差值。结果表明:2种杀菌方式处理的番茄汁在贮藏期间,菌落总数增值速率,维生素C损失及褐变程度随贮藏时间的延长和贮藏温度的升高而增加,其中,褐变程度和维生素C损失率呈线性关系。0～10℃低温贮藏条件下,基于维生素C保留率微波杀菌的番茄汁与巴氏杀菌的相比,其货架期延长了9.1～17.5d,而基于色泽变化程度货架期延长了14.9～71d,25～37℃高温贮藏条件下,基于维生素C保留率和色泽变化程度2种杀菌方式后番茄汁的货架期差别不显著。基于菌落总数作为评价指标,2种杀菌方式之间差别不显著,为1～2d。应用建立的货架期预测模型,以菌落总数和维生素C质量分数作为评价指标,可以快速准确地预测0～37℃贮藏范围内微波处理后番茄汁的货架期,准确率达到90%。以菌落总数作为评价番茄汁货架期的最终标准,0～10℃低温条件下,经微波杀菌的番茄汁推荐其货架期为5～8d,经巴氏杀菌的番茄汁推荐其货架期为5～9d。为微波技术在果汁加工及贮藏中的应用提供技术依据。

关键词：动力学微波杀菌货架期番茄汁

Development of Intermediate Foodstuff Derived from Freshwater Fish in China

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Journal of Ocean University of China 2005年第3期4卷 229-233页

作者： WANG Xichang Yutaka Fukuda CHEN Shunsheng Masahito Yokoyama cheng yudong YUAN Chunhong QU Yinghong Morihiko Sakaguchi College of Food Science Shanghai Fisheries University Shanghai 200090 P.R. China Japan International Research Center for Agricultural Sciences Tsukuba Ibaraki 305-8686 Japan Japan International Research Center for Agricultural Sciences Tsukuba lbaraki 305-8686 Japan Graduate School of Agriculture Kyoto University Kyoto 606-8502 Japan

According to the three-dimensional contour maps showing the gel-forming properties of surimi derived from freshwater fish, 8 species of surimi were classified into two types. The-valley type surimi （silver carp, big-head carp, Chinese snake head and blunt snout bream） shows easy setting, low resistance to gel collapse, high enhancement ability with two-step heating, and narrow optimum heating temperature and time area, which are of the same characteristics as the walleye pollack surimi. In contrast, the Plateau type surimi （tilapia, grass carp, mud carp and common carp） exhibits difficult setting, high resistance to gel collapse, no enhancement ability with two-step heating, and wide optimum heating temperature and time area. There are seasonal changes of gelling properties of silver carp surimi, and the setting ability of surimi gel is higher in winter and lower in summer. The marine fish meat gels and the freshwater fish meat gels have the same acceptability for inland Chinese according to the sensory evaluation results. A slight increase in sensory scorings of kamaboko gels occurred when the extract from walleye pollack muscle was added, especially in the odor scoring of silver carp kamaboko gels.

关键词： surimi gel-forming properties freshwater fish sensory evaluation

微波加热过程中圆柱型包装食品的温度分布研究

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中国食品学报 2002年第4期2卷 6-11页

作者：程裕东上海水产大学食品学院上海200090

从实验和理论上考察介电特性(介电常数、介电损失率)对圆柱型食品温度分布形态形成的影响。实验中以凝胶琼脂为实验样品,通过对样品添加NaCl来改变样品的介电特性,采用液晶感温片测得样品直径面的温度分布。结果表明,添加NaCl可提高样... 详细信息

从实验和理论上考察介电特性(介电常数、介电损失率)对圆柱型食品温度分布形态形成的影响。实验中以凝胶琼脂为实验样品,通过对样品添加NaCl来改变样品的介电特性,采用液晶感温片测得样品直径面的温度分布。结果表明,添加NaCl可提高样品的表面加热性,使样品的温度分布高温区由中心部向着项角部转移。为了从理论上对该现象加以描述,采用数学模型对样品中的温度分布进行了计算,结果表明,计算值与实验值有着良好的一致性。

关键词：微波加热过程圆柱型包装食品温度分布介电特性液晶

“双一流”背景下基于“三局同布”的高水平特色大学转型发展策略

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中国农业教育 2019年第1期20卷 1-5页

作者：程裕东上海海洋大学上海201306

学科建设是大学发展基石。学科系统的结构布局决定学校的功能定位。学科布局定义了一所大学,承载了大学使命。因此要准确定位学科系统布局与结构,准确定义学科功能与评价标准,准确设置学科组织形式和基准,准确界定学科资源配置原则和标... 详细信息

学科建设是大学发展基石。学科系统的结构布局决定学校的功能定位。学科布局定义了一所大学,承载了大学使命。因此要准确定位学科系统布局与结构,准确定义学科功能与评价标准,准确设置学科组织形式和基准,准确界定学科资源配置原则和标准。学科—专业—学位点"三局同布"决定学校的核心竞争力,资源配置方式是支撑学科"三局同布"一体化建设的关键,运行系统的完善提升是提质增效的重要保障。

关键词： “双一流” “三局同布” 高水平特色大学转型发展

Tailoring the oxygen concentration in Ge-Sb-O alloys to enable femtojoule-level phase-change memory operations

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Materials Futures 2022年第4期1卷 174-182页

作者： Jiang-Jing Wang Xiaozhe Wang yudong cheng Jieling Tan Chao Nie Zhe Yang Ming Xu Xiangshui Miao Wei Zhang En Ma Center for Alloy Innovation and Design(CAID) State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Integrated Circuits Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China

Chalcogenide phase-change materials(PCMs),in particular,the flagship Ge2Sb2Te5(GST),are leading candidates for advanced memory ***,GST in conventional devices suffer from high power consumption,because the RESET operation requires melting of the crystalline GST ***,we have developed a conductive-bridge scheme for low-power phase-change application utilizing a self-decomposed Ge-Sb-O(GSO)*** this work,we present thorough structural and electrical characterizations of GSO thin films by tailoring the concentration of oxygen in the phase-separating GSO *** elucidate a two-step process in the as-deposited amorphous film upon the introduction of oxygen:with increasing oxygen doping level,germanium oxides form first,followed by antimony *** enable the conductive-bridge switching mode for femtojoule-level RESET energy,the oxygen content should be sufficiently low to keep the antimony-rich domains easily crystallized under external electrical *** work serves as a useful example to exploit alloy decomposition that develops heterogeneous PCMs,minimizing the active switching volume for low-power electronics.

关键词： phase-change memory amorphous phase low-power conductive-bridge decomposition

The siphonic energy transfer between hot solar wind and cold martian ionosphere through open magnetic flux rope

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Fundamental Research 2024年第4期4卷 882-889页

作者： Xiaojun Xu Lou-Chuang Lee Qi Xu Qing Chang Jing Wang Ming Wang Shaosui Xu Christian Mosti Charles J.Farrugia Xing Wang yudong Ye Zilu Zhou Lei Luo Peishan He Shaoguan cheng State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao 999078China CNSA Macao Center for Space Exploration and Science Macao 999078China Institute of Earth Science Academia SinicaTaipei 115029China Institute of Space Science and Applied Technology Harbin Institute of TechnologyShenzhen 518000China Planetary Environmental and Astrobiological Research Laboratory(PEARL) School of Atmospheric SciencesSun Yat-sen UniversityZhuhai 519000China Nanjing University of Information Science and Technology Nanjing 210000China Space ScienceLaboratory Universityof CaliforniaBerkeleyCA94320USA Space Research Institute Austrian Academy of SciencesGraz 8010Austria University of New Hampshire NH 03824USA

A mechanism for energy transfer from the solar wind to the Martian ionosphere through open magnetic flux rope is proposed based on the observations by Mars Atmosphere and Volatile EvolutioN(MAVEN).The satellite was located in the dayside magnetosheath at an altitude of about 70o km above the northern *** between the hot solar wind protons and the cold heavy ions/neutrals in the subsolar region can cool the protons and heat the heavy *** a result,the magnetosheath protons are siphoned into the ionosphere due to the thermal pressure gradient of protons and the heated heavy ions escape along the open magnetic field *** direct collisions in the lower-altitude region were not detected,this physical process is demonstrated by MAVEN measurements of enhanced proton density,decreased proton temperature and oppositely directed motions of hot and cool protons within the flux rope,which are very different from the observational features of the flux transfer events near the Earth's *** mechanism could universally exist in many contexts where a collisionless plasma region is connected to a collisional plasma *** reconstructing the magnetic geometry and the cross-section of the flux rope using the Grad-Shafranov technique,the ion loss rates are quantitatively estimated to be on the order of 1023 s-l,which is much higher than previously estimated.

关键词： Mars Flux rope Solarwind Ionosphere Ion loss