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Journal of Rare Earths 2024年第3期42卷 464-472,I0002页

作者： Xiaopeng Hu anlin zhang Yufeng Du Li Zhou Changlin Li Jingjing Lian Zhequan Zou Xuan Ouyang Bin Deng Lianwu Xie Ruijin Yu College of Chemistry Biology and Environmental Engineering Xiangnan UniversityChenzhou423043China College of Sciences Central South University of Forestry and TechnologyChangsha410004China College of Chemistry&Pharmacy Northwest A&F UniversityYangling712100China Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application Xiangnan UniversityChenzhou423043China

A novel layered perovskite tantalate phosphor Sr_(3)LaTa_(3)O_(12):Sm^(3+)(SLTO:Sm^(3+)) with orange-red emission was obtained for the first time via the solid-phase synthetic method. The phase purity, surface morphology,element distribution and luminescent properties of the SLTO:xSm^(3+)(x= 0.01 mol%-0.30 mol%) phosphors were investigated. Under 408 nm excitation, the optimum doped SLTO:0.10Sm^(3+) phosphor emits orangered light at 598 nm with the highest emission peak(4G_(5/2)→6H_(7/2)). The critical energy transfer distance is 1.687 nm. The prepared SLTO:0.10Sm^(3+)phosphor has excellent thermal stability with temperature quenching temperature(T_(0.5)> 500 K) and high activation energy(E_(a)= 0.25 e V). Through calculation, the chromaticity coordinates of all samples are concentrated in the orange-red area, and the color purity reaches 99%. The fabricated white light-emitting diode(w-LED) has a good correlated color temperature(5132 K), a high R_(a)(89), and the CIE chromaticity coordinates(0.340, 0.327). Consequently, the superiority of orange-red-emitting tantalate SLTO:Sm^(3+) phosphors for w-LEDs is demonstrated.

关键词： Tantalate Sr_(3)LaTa_(3)O_(12) Sm^(3+) Luminescence LED Rare earths

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锦屏大理岩原位应力环境水软化特性分析

工程科学与技术 2024年第3期56卷 1-10页

作者：张龙张茹任利张泽天张建海谢晶张安林任海罗浩武汉工程大学资源与安全工程学院湖北武汉430074 四川大学水利水电学院四川成都610065 四川大学深地工程智能建造与健康运维全国重点实验室四川成都610065 雅砻江流域水电开发有限公司四川成都610051

中国水电资源主要集中在西部高山峡谷地区,将水电站建筑物布置在极深洞室群常常是经济且较优的选择。受典型河谷地貌特征和区域强烈高地应力、高渗透压环境影响,极深洞室围岩力学特性演化规律和长期稳定性是亟需解决的关键科学问题。不... 详细信息

中国水电资源主要集中在西部高山峡谷地区,将水电站建筑物布置在极深洞室群常常是经济且较优的选择。受典型河谷地貌特征和区域强烈高地应力、高渗透压环境影响,极深洞室围岩力学特性演化规律和长期稳定性是亟需解决的关键科学问题。不同赋存深度应力环境下,水岩耦合作用对岩石力学性质的影响尚不明确,导致深部岩体工程面临一定的风险性和低效性。基于自主设计并研制的深部原位应力环境岩石饱水试验系统,开展锦屏大理岩原位应力环境与无压环境下饱水时长为1、23、60和100 d的水软化试验,并进行5组不同围压下的三轴压缩试验。研究发现:深部原位应力环境下锦屏大理岩饱水100 d后峰值强度劣化程度约为无压饱水100 d的3倍,其余力学参数(如内聚力、内摩擦角等)劣化度也远大于无压饱水条件;锦屏大理岩峰值强度劣化度随水岩耦合环境深度的增加(100、1000、1400、1800和2400 m)均呈现先减小后增大的非线性变化特征;通过探索锦屏大理岩水软化机理,发现摩擦弱化效应与孔隙水压力作用共同造就了锦屏大理岩峰值强度非线性变化规律。结果表明,原位应力环境下的水软化效应及其对围岩力学性质的影响更加突出,在对深部地下工程进行稳定性分析时必须考虑围岩水软化特性,该结论对锦屏地下工程的建设和维护具有重要的指导意义。

关键词：锦屏大理岩原位应力环境水软化特性水软化机理

深地工程多维信息感知与智能建造的发展与展望

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煤炭学报 2024年第3期49卷 1259-1290页

作者：张茹吕游张泽天任利谢晶张安林严志伟米欧四川大学水利水电学院四川成都610065 四川大学深地工程智能建造与健康运维全国重点实验室四川成都610065 四川大学深地科学与工程教育部重点实验室四川成都610065 四川大学山区河流保护与治理全国重点实验室四川成都610065

随着大数据、云计算、人工智能等数字技术的加速演进,各领域智能化、信息化、数字化已成为未来的大势所趋。深地工程作为国家重大战略科技问题,必然面临智能化升级。然而,深部岩体“三高一扰动”的复杂特征给深地工程智能化转型带来严... 详细信息

随着大数据、云计算、人工智能等数字技术的加速演进,各领域智能化、信息化、数字化已成为未来的大势所趋。深地工程作为国家重大战略科技问题,必然面临智能化升级。然而,深部岩体“三高一扰动”的复杂特征给深地工程智能化转型带来严峻的挑战。为实现深地工程与数字技术的高效融合,研究基于“感知-传送-解译-分析-决策”的智能化实践路径,系统回顾了地下工程中智能感知、实时传输、信息解译、数据分析、智能决策等领域的代表性研究进展,并针对性提出了“多感知、快响应、大数据、优方法、精模型、强平台、易推广”的深地工程智能建造发展方向。研究表明:①前沿的深地工程感知技术包括:光纤传感器、MEMS传感器、计算机视觉、自动化机器人等,待数据采集完毕后,通过兼具配置简单、容错能力强、可移动性好等优点的无线通信协议完成数据的实时响应,以实现深地工程监测数据的精准感知与实时传输;②深地工程原位监测技术获取的数据类型主要包括图像、波、点云等,对原始数据解译及分析的模型众多,采用新一代的人工智能技术,如:人工神经网络和深度学习技术,可显著提高解译与分析的效率;③智能决策系统具备高效的学习能力,能够适应复杂环境下的不确定性,通过循环自主学习,以进行决策问题的智能解答。当前,我国深地工程智能建造的政策与产业体系已基本建立,大量智能建造系统已应用于实践。基于此,从智能感知与信息解译、围岩评价及安全评估、围岩控制与动态修复、平台开发及应用推广等4个方面展望了数智化深地工程的发展方向,进而构建了基于多源信息的深地工程围岩稳定性综合评价与分析系统构想。

关键词：深地工程人工智能实时响应信息解译数据分析智能决策

顶板砂岩直接拉伸破坏声发射特征及损伤本构模型

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工程科学与技术 2024年第4期56卷 173-181页

作者：孙紫琬张泽天张茹任利刘小玲张安林张朝鹏四川大学深地工程智能建造与健康运维全国重点实验室四川成都610065 四川大学水利水电学院四川成都610065 四川大学深地科学与工程教育部重点实验室四川成都610065

深部煤炭资源开采常面临复杂的赋存及采动力学环境,冒顶等灾害事故风险激增。顶板拉破坏是其中一个重要诱因,故亟需深入探究顶板岩石拉伸破坏力学特性及损伤演化规律。通过开展顶板砂岩单轴直接拉伸试验和全过程同步声发射测试,探究了... 详细信息

深部煤炭资源开采常面临复杂的赋存及采动力学环境,冒顶等灾害事故风险激增。顶板拉破坏是其中一个重要诱因,故亟需深入探究顶板岩石拉伸破坏力学特性及损伤演化规律。通过开展顶板砂岩单轴直接拉伸试验和全过程同步声发射测试,探究了砂岩的直接拉伸力学特性和声发射时空演化特征,对比分析了顶板砂岩与煤的直接拉伸破坏差异性过程规律,同时发展并对比验证了煤岩拉伸全应力应变损伤本构模型。结果表明:1)顶板砂岩平均直接抗拉强度为5.01MPa,约为煤体直接抗拉强度的7.6倍;顶板砂岩直接拉伸力学参数变异性强,反映出砂岩易产生破坏局部化而导致顶板拉破坏。2)砂岩在直接拉伸峰后的弹性能释放速率显著高于煤体,表现出明显的脆性特征。3)声发射空间定位演化分析揭示了顶板砂岩不同拉伸加载阶段的微裂纹扩展与空间集聚成核过程机制,同时发现峰值应力前仅有少量随机分布的微裂纹产生,主要发生基质的弹性变形;峰值后应力下降20%时,微裂纹局部化,此后宏观裂纹出现并快速扩展,直至破坏。4)构建了基于声发射特征参数的煤岩拉伸损伤本构模型,砂岩和煤的直接拉伸和声发射试验数据的验证显示其具有良好的拟合效果,可较好地表征岩石在直接拉伸作用下的峰后应变软化特征。研究成果对巷道支护结构设计优化,以及煤矿灾害防治具有重要指导意义。

关键词：砂岩煤直接拉伸声发射损伤本构模型

Damage characterization of shale under uniaxial compression by acoustic emission monitoring

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Frontiers of Earth Science 2021年第4期15卷 817-830页

作者： Huijun LU Ru zhang Li REN anlin zhang Yiming YANG Xiaopeng LI State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource&HydropowerSichuan UniversityChengdu 610065China Key Laboratory of Deep Earth Science and Engineering(Ministry of Education) Sichuan UniversityChengdu 610065China

Understanding the damage behavior and cracking mechanism of brittle shale is crucial for hydraulic fracturing *** this research,uniaxial compression tests are conducted on shale samples with different bedding plane orientations,and acoustic emission monitoring is implemented *** results indicate that the apparent elastic modulus increases with increasing bedding *** the bedding orienta-tions of 45°and 90°,the lateral deformation is anisotropic due to the bedding structure,revealing the anisotropic Poisson effect.A shear failure surface and tensile failure surfaces form parallel to the bedding plane for bedding orientations of 45°and 90°,*** the bedding orientation of 0°,shear failure mainly occurs through the bedding ***,the damage mechanism of shale is investigated by crack classification based on AE *** is found that crack initiation is induced by the generation of shear cracks for the bedding orientation of 45°,whereas by the generation of tensile cracks for other bedding *** to damage attributable to different type cracks,shear cracks dominate the damage behavior for bedding orientations of 0°and 45°,whereas tensile cracks dominate the damage behavior for bedding orientation of 90°.Finally,the information entropy is calculated by AE energy.A low value of information entropy,approximately 0.36,predicts failure with a low degree of instability for the bedding orientation of 0°,whereas a high value of information entropy,more than 1.5,predicts failure with a high degree of instability for other bedding *** finding indicates that the failure behavior is gradual progressive damage for bedding orientation of 0°,whereas sudden damage dominates failure behavior for other bedding orientations.

关键词： shale damage characterization uniaxial compression acoustic emission

Graft of Chiral Amino Alcohol onto Poly（menthyl vinyl ketone） and the Grafted Polymer＇s Inducement to the Asymmetric Addition of Phenylacetylene to Aromatic Ketone

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Chemical Research in Chinese Universities 2015年第4期31卷 669-673页

作者： LIU Can ZHOU Ya YANG Liwen YANG Nianfa zhang anlin Key Laboratory of Environmentally Friendly Chemistry and Applications Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 P. R. China

A new kind of optically active polymer bearing chiral amino alcohol was prepared by means of graft. The resulting grafted polymer was obtained as follows. First, the carbonyl of optically active helical poly（menthyl vinyl ketone）（poly-MVK） was reduced to hydroxyl group with lithium aluminum hydride as a reductant to yield poly（1-menthyl-2-propen-1-ol）（poly-MPO）. Second, the hydroxyl group of poly-MPO reacted with epichlorohydrin to yield methyloxirane-loading poly-MPO[（poly-MPO）-MO]. Third, the（poly-MPO）-MO reacted with amine to pro- duce optically active polymer bearing chiral amino alcohol[（poly-MPO）-APO]. The （poly-MPO）-APO was applied to the asymmetric addition of phenylacetylene to aromatic ketone. Good enantioselectivities were achieved and the catalyst could be recovered and reused 5 times with unchanged enantioselectivity and slightly decreased activity.

关键词： Chiral amino alcohol Graft Poly(menthyl vinyl ketone) Enantioselective addition

Engineering phosphorus-containing lignin for epoxy biocomposites with enhanced thermal stability,fire retardancy and mechanical properties

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Journal of Materials Science & Technology 2023年第36期167卷 82-93页

作者： anlin zhang Jianzhong zhang Lina Liu Jinfeng Dai Xinyu Lu Siqi Huo Min Hong Xiaohuan Liu Mark Lynch Xuesen Zeng Paulomi Burey Pingan Song College of Chemistry and Materials Science Zhejiang A&F UniversityHangzhou 311300China Centre for Future Materials University of Southern QueenslandSpringfieldQLD 4300Australia College of Life Science Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and ConservationTaizhou UniversityTaizhou 318000China School of Agriculture and Environmental Science University of Southern QueenslandSpringfieldQLD 4300Australia

Fabricating a high-performing thermoset using bio-based flame retardant is critical for the sustain-able development of engineering materials with superior fire safety and robust mechanical ***,the epoxy(EP)composites with the industrial requirements are manufactured with a novel high-efficient,lignin-based flame retardant named DAL-x,which is fabricated by grafting 9,10-dihydro-9-oxa-10-phosphaze-10-oxide(DOPO)onto *** resulting DAL-x/EP composite exhibits excellent flame retardancy with a desirable UL-94 V-0 rating and a satisfactory limiting oxygen index(LOI)of 29.8%due to the appropriate phosphorus content of DAL-x with adjustable molecular chain ***-over,the DAL-x/EP composite shows an unexpected improvement in the elastic modulus(∼36%)and well-preserved strength and ductility compared with those of pure *** work offers a feasible strat-egy for creating efficient bio-based flame retardants utilizing industrial waste lignin and preparing high-performance EP composites that meet the demanding requirement of fire retardancy in industries,con-tributing to the circular economy and sustainability.

关键词： Epoxy resin Lignin Flame retardancy Thermal stability Mechanical property

Influences of Lactiplantibacillus plantarum and Saccharomyces cerevisiae fermentation on the nutritional components,flavor property and lipid-lowering effect of highland barley

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未来食品学报(英文) 2024年第3期4卷 258-266页

作者： Juan Bai Linzhao He Jinfu zhang Xiangyue Gu Beiqi Wu anlin Wang Ying Zhu Jiayan zhang Yansheng Zhao Jie Yuan Xiang Xiao School of Food and Biological Engineering Jiangsu UniversityZhenjiang 212013China

Highland barley is a well-known cereal in Qinghai-Tibet Plateau area with high nutritional value,which has been reported to be a health-promoting grain for the obesity and the *** by certain microbiota can improve the flavor property and nutritional *** the present study,Lactiplantibacillus plantarum and Saccharomyces cerevisiae were singly or jointly applied to ferment highland barley,and the profile of volatile substances and lipid-lowering effects of the respective extracts were *** indicated that either *** or *** or co-fermentation could consume the polysaccharides of highland barley to provide energy,and dramatically increase the contents of total protein and *** chromatography-mass spectrometry(GC-MS)analysis revealed that the presence of *** was critical for production of the pleasant flavors,especially for the ethyl ester substances including hexadecanoic acid ethyl,hexanoic acid ethyl ester and so ***,we found that fermented highland barley extracts by *** exhibited stronger lipid-lowering effects in Caenorhabditis elegans than that by ***,while the co-fermentation not only emitted pleasant odors but also exerted high hypolipidemic *** all,co-fermentation by *** and *** was proposed to be a promising processing to improve the flavor and functional properties of highland barley.

关键词： Highland barley Lactiplantibacillus plantarum Saccharomyces cerevisiae Fermentation Flavor property Lipid-lowering