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Particuology 2017年第3期15卷 21-29页

作者： Xiaoqiang Gu lutong lu Jiangu Qian Department o.fGeotechnical Engineering & Key Laboratory of Geotechnical and Engineering of the Ministry of Education Tongji University Shanghai 200092 China State Key Laboratory of Hydrology-Water Resource and Hydraulic Engineering Nanjing Hydraulic Research Institute Nanjing 210098 China

Discrete element modeling was used to investigate the effect of particle size distribution on the small strain shear stiffness of granular soils and explore the fundamental mechanism controlling this small strain shear stiffness at the particle level. The results indicate that the mean particle size has a negligible effect on the small strain shear modulus. The observed increase of the shear modulus with increasing particle size is caused by a scale effect. It is suggested that the ratio of sample size to the mean particle size should be larger than 11.5 to avoid this possible scale effect. At the same confining pressure and void ratio, the small strain shear modulus decreases as the coefficient of uniformity of the soil increases. The Poisson＇s ratio decreases with decreasing void ratio and increasing confining pressure instead of being constant as is commonly assumed. Microscopic analyses indicate that the small strain shear stiffness and Poisson＇s ratio depend uniquely on the soil＇s coordination number.

关键词： Discrete element method Particle size distribution Small strain stiffness Poisson＇s ratio Coordination number

小麦醇溶蛋白/卵磷脂复合纳米粒子制备Pickering乳液研究

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中国粮油学报 2023年第3期38卷 52-60页

作者：鲁路通杨雪飞刘凤茹钟昔阳罗水忠李兴江郑志合肥工业大学食品与生物工程学院安徽省农产品精深加工重点实验室合肥230601

以小麦醇溶蛋白和卵磷脂为原料,利用pH循环法制备小麦醇溶蛋白/卵磷脂复合纳米粒子,并以此为稳定剂制备Pickering乳液。探究了纳米粒子质量分数、油相体积分数对Pickering乳液的粒径、微观形貌、乳析稳定性、储藏稳定性及流变学特性的... 详细信息

以小麦醇溶蛋白和卵磷脂为原料,利用pH循环法制备小麦醇溶蛋白/卵磷脂复合纳米粒子,并以此为稳定剂制备Pickering乳液。探究了纳米粒子质量分数、油相体积分数对Pickering乳液的粒径、微观形貌、乳析稳定性、储藏稳定性及流变学特性的影响。结果表明:制备的Pickering乳液为水包油型乳液。当小麦醇溶蛋白/卵磷脂质量比为2∶1时,Pickering乳液的乳化活性和乳化稳定性分别为9.33 m 2/g和93.33%。固定油相体积分数为50%,当纳米粒子质量分数由0.1%增加到2.0%时,Pickering乳液的粒径由56.19μm减小到36.57μm,乳析指数由46.5%增加到91.0%;固定纳米粒子质量分数为1.5%,当油相体积分数由20%增加到60%时,Pickering乳液的粒径由31.43μm增大到38.79μm,乳析指数由54%增加到93%。流变学结果表明,乳液的表观黏度和弹性性能随着纳米粒子质量分数以及油相体积分数的增加而增加,且都具有剪切稀化的现象,形成了凝胶网络结构;环境应力稳定性实验表明,Pickering乳液具有良好的NaCl离子稳定性。

关键词：小麦醇溶蛋白卵磷脂 Pickering乳液稳定性流变特性

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土体小应变刚度特性的试验研究

同济大学学报（自然科学版） 2018年第3期46卷 312-317页

作者：顾晓强陆路通李雄威居尚威南京水利科学研究院水文水资源与水利工程科学国家重点实验室江苏南京210029 同济大学土木工程学院上海200092 常州工学院土木建筑工程学院江苏常州213002 安徽理工大学土木建筑工程学院安徽合肥232001

土体的小应变刚度在深基坑或隧道开挖等以变形控制为主的工程中是起决定性作用的参数.利用固结仪、应力路径三轴仪和共振柱联合测定江苏常州地区3个典型土层原状土的小应变刚度特性,得到了土体小应变硬化模型(HSS)的相关参数,包括土体... 详细信息

土体的小应变刚度在深基坑或隧道开挖等以变形控制为主的工程中是起决定性作用的参数.利用固结仪、应力路径三轴仪和共振柱联合测定江苏常州地区3个典型土层原状土的小应变刚度特性,得到了土体小应变硬化模型(HSS)的相关参数,包括土体的初始剪切模量、模量退化曲线、土体强度参数、加卸载模量等.分析了土体有效应力对土体小应变刚度特性的影响,并对如何选择合适的小应变模型参数提出了初步建议.

关键词：土体刚度小应变硬化模型固结试验三轴试验共振柱

Synthesis of(HfZrTiNbTa)N powders via nitride thermal reduction with soft mechano-chemical assistance

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Journal of Advanced Ceramics 2023年第3期12卷 565-577页

作者： Xiang Liu Youjun lu Qian Xu lutong Yang Hongfang Shen Wenzhou Sun Xiao Zhang Yanmin Wang School of Materials Science&Engineering North Minzu UniversityYinchuan 750021China College of Materials Science&Engineering South China University of TechnologyGuangzhou 510641China

High-entropy nitride powders are one of prerequisite materials for the preparation of high-performance high-entropy nitride ceramics.In this paper,high-entropy(HfZrTiNbTa)N powders were synthesized via nitride(i.e.,silicon nitride(Si_(3)N_(4)))thermal reduction with soft mechanochemical assistance.The results show that metal oxides like hafnium dioxide(HfO_(2)),zirconium dioxide(ZrO_(2)),titanium dioxide(TiO_(2)),niobium pentoxide(Nb_(2)O_(5)),and tantalum pentoxide(Ta_(2)O_(5))can all be transformed into the corresponding metal nitrides in the presence of Si_(3)N_(4)at 1700℃,and solid solution of the metal nitrides can be formed as the temperature increases to 2100℃.The high-entropy(HfZrTiNbTa)N powders with submicron-sized particles,a narrower size distribution,and a single face-centered cubic(fcc)structure are obtained from raw material mixtures ground for 10 h and subsequently sintered at 1800℃.In addition,the high-entropy bulk nitride ceramics with relative density(Rw)of 94.31%±0.76%,Vickers hardness of 21.00±0.94 GPa,and fracture toughness(KIC)of 3.18±0.16 MPa·m1/2 are obtained with submicron-sized powders,which are superior to those obtained with micron-sized powders.

关键词： soft mechanochemistry thermal reduction high-entropy nitride powders high-entropy nitrideceramics

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菱镁矿尾矿粉对水泥砂浆力学与收缩性能研究

新型建筑材料 2024年第2期51卷 59-62页

作者：温永钦卢金山王禄彤姜婷婷吉林建筑大学吉林长春130118

为改善商品混凝土收缩严重的现象,通过外掺菱镁矿尾矿粉,研究了菱镁矿尾矿粉掺量及细度对水泥砂浆抗压、抗折强度及收缩性能的影响。试验结果表明:随着菱镁矿尾矿粉掺量的增加,水泥砂浆的抗压和抗折强度均呈先提高后降低的趋势,掺量为10... 详细信息

为改善商品混凝土收缩严重的现象,通过外掺菱镁矿尾矿粉,研究了菱镁矿尾矿粉掺量及细度对水泥砂浆抗压、抗折强度及收缩性能的影响。试验结果表明:随着菱镁矿尾矿粉掺量的增加,水泥砂浆的抗压和抗折强度均呈先提高后降低的趋势,掺量为10%时28 d抗压、抗折强度比不掺时分别提高20.6%、19.8%;对水泥砂浆干燥收缩率影响大小顺序为:菱镁矿尾矿粉细度>菱镁矿尾矿粉掺量>水胶比,水胶比为0.35、菱镁矿尾矿粉细度为500目,菱镁矿尾矿粉掺量为9%时补偿水泥砂浆收缩效果最好。

关键词：菱镁矿尾矿粉抗压强度抗折强度干燥收缩率

CO_(2)fractional laser-assisted transdermal delivery of silk nanofiber carriers in a rabbit ear hypertrophic scar model

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Burns & Trauma 2022年第1期10卷 142-154页

作者： Yan Yang lutong Liu Xiaojin Wu Xue Wang Qiang lu Zhen Zhang Department of Dermatology Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011P.R.China National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou 215213P.R.China

Background:Hypertrophic scars are skin fibrotic diseases,characterized by fibroblast hyperprolif-eration and excessive accumulation of extracellular matrix.However,topical drug application for hypertrophic scars are unsatisfactory.The purpose of this study was to explore the permeability of silk nanofiber hydrogels(SNFs)loaded with rhodamine 6G(R6G)and rhodamine 110(R110)mediated by CO_(2)fractional laser irradiation into hypertrophic scar tissues.Methods:In this work,R6G and R110 were chosen as hydrophilic and hydrophobic model molecules.They were loaded inside SNFs.In vivo rabbit ear hypertrophic scars were treated with CO_(2)fractional laser irradiation and then R6G/R110-laden SNFs were applied to the scars to evaluate their synergetic effect on drug penetration efficiency.Their permeability was quantified by fluorescence intensity and measured by confocal laser scanning microscopy on days 1,3,5 and 7.More specifically,the thermal coagulation zone(CZ)and its surrounding area(peri-CZ)caused by the thermal coagulation of the laser were discussed separately.Results:Our data indicated that the SNFs promoted the penetration of R6G but not that of R110 in the peri-CZ on day 1 when combined with laser irradiation.Interestingly,both R6G and R110 were abundant in the CZ and remained stable on days 1,3 and 5.Moreover,rapid re-epithelialization hindered the long-term permeability of both drugs.Conclusion:Combining CO_(2)fractional laser irradiation with SNF drug delivery could improve the efficiency of hydrophilic drug delivery within 24 h before total re-epithelialization.

关键词： CO_(2)fractional laser Hypertrophic scar Silk nanofiber hydrogels Transdermal delivery Laser-assisted drug delivery

Interfacial adsorption-insertion mechanism induced by phase boundary toward better aqueous Zn-ion battery

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InfoMat 2021年第9期3卷 1028-1036页

作者： lutong Shan Yiren Wang Shuquan Liang Boya Tang Yongqiang Yang Ziqing Wang Bingan lu Jiang Zhou School of Materials Science and Engineering Central South UniversityKey Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceChangshaHunanPeople's Republic of China Department of Chemistry University of ManchesterManchesterUK School of Physics and Electronics Hunan UniversityChangshaPeople's Republic of China

Biphasic and multiphasic compounds have been well clarified to achieve extraordinary electrochemical properties as advanced energy storage materials.Yet the role of phase boundaries in improving the performance is remained to be illustrated.Herein,we reported the biphasic vanadate,that is,Na_(1.2)V_(3)O_(8)/K_(2)V_(6)O_(16)·1.5H_(2)O(designated as Na0.5K0.5VO),and detected the novel interfacial adsorption-insertion mechanism induced by phase boundaries.Firstprinciples calculations indicated that large amount of Zn^(2+)and H^(+)ions would be absorbed by the phase boundaries and most of them would insert into the host structure,which not only promote the specific capacity,but also effectively reduce diffusion energy barrier toward faster reaction kinetics.Driven by this advanced interfacial adsorption-insertion mechanism,the aqueous Zn/Na_(0.5)K_(0.5)VO is able to perform excellent rate capability as well as long-term cycling performance.A stable capacity of 267 mA h g^(-1)after 800 cycles at 5 A g^(-1)can be achieved.The discovery of this mechanism is beneficial to understand the performance enhancement mechanism of biphasic and multiphasic compounds as well as pave pathway for the strategic design of highperformance energy storage materials.

关键词： aqueous zinc-ion battery cathode energy storage mechanism phase boundary vanadiumbased materials

双配体金属有机框架材料吸附水环境中Cr(Ⅵ)研究

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化工新型材料 2022年第8期50卷 229-234页

作者：武凯莉党璐童董清丽张璐康永锋上海海洋大学食品学院上海201306 上海水产品加工及贮藏工程技术研究中心上海201306 食品科学与工程国家级实验教学示范中心(上海海洋大学) 上海201306

以铜离子为金属中心,1,3,5-苯甲酸和4,4′-联吡啶为有机配体,构建羧酸、吡啶双配体金属-有机框架(MOFs)材料。通过傅里叶变换红外光谱仪、扫描电子显微镜和X射线衍射仪对铜基MOFs材料Cu(BTC)和双配体MOFs材料进行了表征。结果表明:双配... 详细信息

以铜离子为金属中心,1,3,5-苯甲酸和4,4′-联吡啶为有机配体,构建羧酸、吡啶双配体金属-有机框架(MOFs)材料。通过傅里叶变换红外光谱仪、扫描电子显微镜和X射线衍射仪对铜基MOFs材料Cu(BTC)和双配体MOFs材料进行了表征。结果表明:双配体MOFs材料在酸性条件下表现出良好的吸附性能,该材料对Cr(Ⅵ)的吸附更符合准二级动力学方程和Freundlich等温吸附方程。经过5次吸附-解吸循环后,吸附量基本恒定,该材料可以重复使用。

关键词：双配体金属有机框架材料铬离子吸附

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煤层气储层可改造性评价——以郑庄区块为例

煤田地质与勘探 2021年第1期49卷 119-129页

作者：姚艳斌王辉杨延辉刘大锰鲁秀芹曹路通中国地质大学(北京)能源学院北京100083 煤层气开发利用国家工程研究中心煤储层物性实验室北京100083 中国石油华北油田公司河北任丘062552 中国石油天然气集团公司煤层气开采先导试验基地河北任丘062552

我国煤层气资源探明率与动用率“双低”,导致煤层气增产显著放缓,已经成为制约我国煤层气产业发展的瓶颈问题。常规煤储层评价较少考虑煤储层的可改造性潜力,导致发现的优质储量偏少,已发现的储量动用率偏低,因此,迫切需要开展煤储层可... 详细信息

我国煤层气资源探明率与动用率“双低”,导致煤层气增产显著放缓,已经成为制约我国煤层气产业发展的瓶颈问题。常规煤储层评价较少考虑煤储层的可改造性潜力,导致发现的优质储量偏少,已发现的储量动用率偏低,因此,迫切需要开展煤储层可改造性评价研究。以沁水盆地南部郑庄区块为例,系统开展了岩心与大样物理模拟实验、测井与地震反演分析等;通过对比分析典型井储层地质特征与微地震水力压裂裂缝监测结果,指出影响煤储层可改造性的关键地质因素为煤体结构、宏观煤岩类型、煤层构造变形、煤层地应力、煤层与顶底板的抗拉强度之差,建立了煤储层可改造性综合定量评价模型;并对郑庄区块煤储层可改造性进行了评价分区,其结果得到了区内千余口产气井的验证。研究成果可用于指导尚未动用储量区的煤层气建产和已动用储量区的开发方案优化调整,根据不同区块储层地质特点选择适应性的工程技术与改造方案,以实现地质工程一体化,是我国煤层气“增储上产”的关键。

关键词：煤储层煤层气可压裂性储层改造提高采收率沁水盆地郑庄区块

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内存云分级存储架构下的数据迁移模型

计算机应用 2015年第12期35卷 3392-3397页

作者：郭刚于炯鲁亮英昌甜尹路通新疆大学软件学院乌鲁木齐830008 新疆大学信息科学与工程学院乌鲁木齐830046

为了实现在线海量数据的高效存储与访问,在内存云分级存储架构下,提出一种基于数据重要性的迁移模型(MMDS)。首先,通过数据本身的大小、时间重要性、用户访问总量等因素对数据本身的重要性进行计算;其次,采用推荐系统中相似用户和PageR... 详细信息

为了实现在线海量数据的高效存储与访问,在内存云分级存储架构下,提出一种基于数据重要性的迁移模型(MMDS)。首先,通过数据本身的大小、时间重要性、用户访问总量等因素对数据本身的重要性进行计算;其次,采用推荐系统中相似用户和PageRank算法中的重要性排名思想对数据的潜在价值进行评估,数据重要性和潜在价值共同决定了数据的重要程度;然后基于数据的重要性,设计了数据迁移机制。实验结果表明:该模型能够识别出数据的重要程度并分级放置数据,相比最近最少使用(LRU)、最近最不常用(LFU)、基于价值评估的数据迁移(MSDV)等算法,提高了存储系统的数据访问命中率。该模型能够缓解部分存储压力,数据访问性能也有了一定的提高。

关键词：分级存储内存云数据重要性数据迁移潜在价值