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许信高速某标段滑坡的形成机理及稳定性数值分析

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水利与建筑工程学报 2024年第2期22卷 142-148页

作者：晁玉卓余博源华北水利水电大学地球科学与工程学院河南郑州450046

许信高速公路某标段深挖路堑东侧斜坡坡体出现裂缝,为保障高速公路的正常施工和安全运行,在对滑坡进行现场考察和工程地质勘察的基础上,详细分析滑坡变形的破坏与形成机理。利用FLAC^(3D)对滑坡稳定性进行数值模拟计算,并通过强度折减法... 详细信息

许信高速公路某标段深挖路堑东侧斜坡坡体出现裂缝,为保障高速公路的正常施工和安全运行,在对滑坡进行现场考察和工程地质勘察的基础上,详细分析滑坡变形的破坏与形成机理。利用FLAC^(3D)对滑坡稳定性进行数值模拟计算,并通过强度折减法,对不同工况时的滑坡稳定性进行数值分析。结果表明:滑坡目前处于蠕变阶段,处于不稳定状态;在暴雨的激发下将加剧滑坡的变形速度;在地震作用下滑坡处于失稳状态。滑坡属于前缘失去支撑及压重而产生的牵引式滑坡,建议采用抗滑桩、卸载和护坡等综合防治方案以保证坡体的稳定。

关键词：高速公路滑坡滑坡形成机理数值模拟稳定性分析强度折减法

Multiscale assembly of polyoxometalates:From clusters to materials

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ChemPhysMater 2023年第1期2卷 20-29页

作者： boyuan yu Xin Zhao Jiangfeng Ni Feng Yang Department of Chemistry Guangdong Provincial Key Laboratory of CatalysisSouthern University of Science and TechnologyShenzhen 518055China School of Physical Science and Technology Center for Energy Conversion Materials&Physics(CECMP)Jiangsu Key Laboratory of Thin FilmsSoochow UniversitySuzhou 215006China

Polyoxometalates(POMs)have drawn broad and intense interest due to their unique structure-dependent *** assembly of POM molecules into nanoarchitectures and superstructures can bridge the gap between micro-molecule and bulk POM materials and integrate the merits of molecule and materials that are widely used in catalysis,energy conversion,electronics,and *** synthetic methodologies and applications of multiscale POM assemblies have been widely *** this review,we survey the POM-based multiscale assembly focusing on two aspects:the strategies for multiscale assembly of POMs and the emerging applications of POM *** the multiscale assembly,we focus on the methods of POMs assembly including templated synthesis and self-and co-assembly of POMs into nanoarchitectures and *** the applications,we review the applications of POM assemblies in energy,catalysis,and functional ***,we present the prospects for the future synthetic design and applications of POM assemblies.

关键词： Polyoxometalates Clusters Hybrids Host-guest chemistry Multiscale assembly

Direct environmental TEM observation of silicon diffusion-induced strong metal-silica interaction for boosting CO_(2)hydrogenation

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Nano Research 2023年第2期16卷 2209-2217页

作者： Lei Wang Lei Zhang Luyao Zhang yulong yun Kun Wang boyuan yu Xin Zhao Feng Yang Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China

For the high-temperature catalytic reaction,revealing the interface of catalyst–support and its evolution under reactive conditions is of crucial importance for understanding the reaction ***,much less is known about the atomic-scale interface of the hard-to-reduce silica-metal compared to that of reducible oxide *** we reported the general behaviors of SiO_(2)migration onto various metal(Pt,Co,Rh,Pd,Ru,and Ni)nanocrystals supported on ***,the Pt/SiO_(2)catalytic system,which boosted the CO_(2)hydrogenation to CO,exhibited the reduction of Si0 at the Pt-SiO2 interface under H2 and further Si diffusion into the near surface of Pt nanoparticles,which was unveiled by in-situ environmental transmission electron microscopy coupled with *** reconstructed interface with Si diffused into Pt increased the sinter resistance of catalyst and thus improved the catalytic *** morphology of metal nanoparticles with SiO_(2)overlayer were dynamically evolved under reducing,vacuum,and oxidizing atmospheres,with a thicker SiO_(2)layer under oxidizing *** theoretical calculations revealed the mechanism that the Si-Pt surface provided synergistic sites for the activation of CO_(2)/H_(2)to produce CO with lower energy barriers,consequently boosting the high-temperature reverse water-gas shift *** findings deepen the understanding toward the interface structure of inert oxide supported catalysts.

关键词： in-situ environmental transmission electron microscopy interface strong metal-support interaction silica support reverse water gas-shift reaction

Biomechanical energy harvesting technologies for wearable electronics:Theories and devices

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Friction 2024年第8期12卷 1655-1679页

作者： Xiaowen LI Xu ZENG Junwei LI boyuan LI yu CHEN Xiaosheng ZHANG University of Electronic Science and Technology of China Chengdu 611731China

Wearable biomechanical energy harvesting devices have received a lot of attention recently,benefiting from the rapid advancement of theories and devices in the field of the micro electromechanical system(MEMS).They not only fulfil the requirements for powering wearable electronic devices but also provide an attractive prospect for powering self-powered flexible electronic devices when *** this article,we provide a review of the theories and devices of biomechanical energy harvesting technology for wearable *** different forms of biomechanical energy harvesting mechanisms,including the piezoelectric effect,electromagnetic effect,and electrostatic effect,are investigated in *** fundamental principle of converting other types of energy from the biomechanical environment into electrical energy,as well as the most commonly-used analytical theoretical models,are outlined for each ***,the features,properties,and applications of energy harvesting devices are *** addition,the coupled multi-effect hybrid energy harvesting devices are listed,showing the various possibilities of biomechanical energy harvesting devices for serving as sources,sensors,and ***,we present perspectives on the future trends of biomechanical energy harvesting devices for wearable electronics applications.

关键词： micro electromechanical system(MEMS) nanogenerators biomechanical energy harvesters wearable electronics

Investigation of Effects of Large Dielectric Constants on Triaxial Induction Logs

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Applied Mathematics 2012年第11期3卷 1811-1817页

作者： Zhijuan Zhang boyuan yu Ce Liu Electrical Engineering Department University of Housotn Houston USA

The dielectric effect is receiving increasing interest in the study of resistivity logging. Several recent findings have proven that the dielectric effect can cause negative imaginary signals on the array induction logging. However, very few researches discuss the dielectric effect on the triaxial induction logging which is a novel technology in solving anisotropy problem. In this paper, we investigate the effect of large dielectric constants on a basic triaxial induction tool in a 1-D homogenous earth formation. The simulation model is derived from Maxwell equation and calculated by wave number integration. Sufficient simulations have been done. We performed an asymptotic analysis of the dielectric effect within the low-freq limit, yielding interesting observations on the dielectric effect with respect to frequency, spacing, and anisotropy. Those findings provide important and useful guidance for researchers to study on the dielectric effect on the triaxial induction logging.

关键词： Resistivity Dielectric Simulation Interpretation

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整体护理对机采血小板捐献者的应用效果

中国继续医学教育 2016年第9期8卷 235-236页

作者：于波媛吉林省四平市中心血站采血科吉林四平136000

目的总结分析整体护理在机采血小板捐献者中的应用效果。方法选择2014年1~12月参与机采血小板捐献的1 500例人次为研究对象,随机分为观察组和对照组各750例,对照组给予一般护理,观察组则给予整体护理措施,观察比较两组献血反应及护理满... 详细信息

目的总结分析整体护理在机采血小板捐献者中的应用效果。方法选择2014年1~12月参与机采血小板捐献的1 500例人次为研究对象,随机分为观察组和对照组各750例,对照组给予一般护理,观察组则给予整体护理措施,观察比较两组献血反应及护理满意度的差异。结果观察组献血者献血反应率为2.00%低于对照组的10.00%,而护理满意度为95.00%高于对照组的86.93%,差异具有统计学意义（P〈0.01）。结论整体护理措施的实施有助于降低机采血小板捐献者的献血反应,提高护理满意度。

关键词：整体护理机采血小板献血反应

北方保护地专用耐低温、弱光小白菜种质资源评价

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蔬菜 2023年第7期 68-72页

作者：于博源海南大学辽宁省农业科学院

针对北方保护地栽培小白菜品种匮乏、老品种退化严重等问题，选择20个国内外的小白菜品种，在冬季日光温室进行比较试验，对各品种耐低温、弱光相关的指标（抽薹率、抗病性、产量及商品外观性状）进行综合评价。结果表明：华英青梗菜、... 详细信息

针对北方保护地栽培小白菜品种匮乏、老品种退化严重等问题，选择20个国内外的小白菜品种，在冬季日光温室进行比较试验，对各品种耐低温、弱光相关的指标（抽薹率、抗病性、产量及商品外观性状）进行综合评价。结果表明：华英青梗菜、冬の先、绿铧青梗菜3个品种抽薹率均达到了100.00%，不耐低温。京冠二号、华冠青梗白菜、华美青梗菜、16Y-1×7、16Y-8×2、绿美人6个品种抽薹率均为0.00%，较耐低温；京冠二号产量最高，说明该品种适宜低温、弱光的生产条件；京冠二号、16Y-1×7、16Y-8×2、绿美人对软腐病、黑腐病、白锈病的抗性均较强，且叶柄保持绿色，束腰性好，菜心紧实度高，经综合评价可作为耐低温、弱光优良种质资源合理利用。

关键词：小白菜耐低温耐弱光种质资源评价

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微型大白菜杂交新组合（品种）比较试验

蔬菜 2023年第8期 57-60页

作者：于博源辽宁省农业科学院海南大学

为了丰富辽宁省微型大白菜的栽培品种类型，利用已选出的黄心、小型化、抗根肿病的大白菜高代自交不亲和系为亲本，进行不完全双列杂交，得到6个杂交组合，调查不同杂交组合的主要植物学性状及产量性状。结果表明：组合C2的生长势比较... 详细信息

为了丰富辽宁省微型大白菜的栽培品种类型，利用已选出的黄心、小型化、抗根肿病的大白菜高代自交不亲和系为亲本，进行不完全双列杂交，得到6个杂交组合，调查不同杂交组合的主要植物学性状及产量性状。结果表明：组合C2的生长势比较强，生长速度较快，株高、株幅、叶片长和叶片宽均达到了期望值；组合C3的叶球宽、高度均最大，分别达到36.73cm和55.63cm，单株质量和小区产量均达最大值，紧实度最好；组合C2、C3小区平均产量分别为32.75kg和33.78kg，综合性状及产量表现优良，为较好的杂交组合；初步判断这2个组合具有应用价值，值得进一步研究利用。

关键词：微型大白菜杂交育种杂交组合农艺性状

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数字技术在现代建筑设计中的应用

建筑与文化 2020年第5期 85-87页

作者：张蕾于博远东南大学建筑学院哈尔滨理工大学艺术学院伦敦大学学院

数字作为一种建筑创作的技术和方法,深刻地影响着建筑设计的构思、表达与拟态推演。文章通过对数字技术的基本概念和发展进行解析,梳理其在建筑设计领域中的应用脉络,并对PS(Photoshop)、CAAD、Rhino-Grasshopper三种具有代表性的数字... 详细信息

数字作为一种建筑创作的技术和方法,深刻地影响着建筑设计的构思、表达与拟态推演。文章通过对数字技术的基本概念和发展进行解析,梳理其在建筑设计领域中的应用脉络,并对PS(Photoshop)、CAAD、Rhino-Grasshopper三种具有代表性的数字技术及其应用方法进行深入分析,以期为那些致力于数字化建筑设计学习的学生提供一些学习上的参考,为致力于数字建筑设计探索的人提供一点方法支撑。

关键词：建筑设计数字技术计算机辅助建筑设计参数化