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框架承担倾覆力矩的合理计算方法

建筑结构 2024年第4期54卷 124-135页

作者：常磊崔济东廖耘周定李盛勇广州容柏生建筑工程设计事务所广州510170

为理清框架倾覆力矩的相关概念区别,并给出各自合理计算方法,对计算框架、支撑、框架+支撑、局部框架或者局部框架+支撑倾覆力矩的统一解法进行总结,给出相应的力学法。指出框架倾覆力矩和框架承担倾覆力矩之间的显著区别,给出两者的异... 详细信息

为理清框架倾覆力矩的相关概念区别,并给出各自合理计算方法,对计算框架、支撑、框架+支撑、局部框架或者局部框架+支撑倾覆力矩的统一解法进行总结,给出相应的力学法。指出框架倾覆力矩和框架承担倾覆力矩之间的显著区别,给出两者的异同以及建筑结构中框架承担倾覆力矩的计算原则,并进一步给出合理计算框架承担倾覆力矩的方法,即修正的统一解法。修正的统一解法适用于一般建筑结构和带竖向构件转换的结构,也适用于带伸臂框架-核心筒结构。最后对典型结构算例的框架承担倾覆力矩进行计算分析,结果合理可行。

关键词：倾覆力矩框架结构框架-剪力墙结构剪力墙结构带伸臂框架-核心筒结构框支剪力墙结构统一解法

以骨间前血管为受区血管的游离皮瓣修复前臂创面5例

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中华显微外科杂志 2024年第4期47卷 404-409页

作者：周涛王乾坤何亮周定王子富黄俊钟林牛杨金哲尹东周洪翔安徽医科大学第一附属医院骨科手足修复重建病区合肥

目的探讨以骨间前动、静脉为受区血管的游离皮瓣在治疗前臂创面的临床疗效。方法回顾分析2022年7月-2023年11月安徽医科大学第一附属医院骨科手足修复重建病区收治的5例应用吻合骨间前动、静脉的游离皮瓣修复前臂骨和肌腱外露创面患者,... 详细信息

目的探讨以骨间前动、静脉为受区血管的游离皮瓣在治疗前臂创面的临床疗效。方法回顾分析2022年7月-2023年11月安徽医科大学第一附属医院骨科手足修复重建病区收治的5例应用吻合骨间前动、静脉的游离皮瓣修复前臂骨和肌腱外露创面患者,均为男性,年龄31～54岁,平均41.8岁,其中前臂中段尺背侧创面2例,前臂远端创面2例,前臂桡掌侧创面1例。清创后组织外露面积11.0 cm×4.5 cm～20.0 cm×6.0 cm,应用游离股前外侧穿支皮瓣(ALTPF)修复前臂创面4例,皮瓣面积13.0 cm×6.0 cm～22.0 cm×7.0 cm,应用游离旋髂浅动脉穿支皮瓣1例,皮瓣面积12.0 cm×5.5 cm,供区均直接缝合。定期门诊随访患者,观察患者皮瓣血运、质地、外观、骨折愈合及患肢功能等,并根据英国医学研究会(BMRC)感觉功能评定标准评定皮瓣感觉。结果 5例患者均获随访,随访时间4～16个月,平均8.8个月。皮瓣均完全成活,未出现边缘坏死和伤口感染,皮瓣色泽、质地良好。患肢手部血供良好,未出现发凉、怕冷症状。末次随访根据BMRC感觉功能评定标准评定,皮瓣感觉达S2～S3+,外观满意。结论以骨间前动、静脉为受区血管的游离皮瓣治疗前臂创面可获得满意的临床疗效,值得进一步深入研究。

关键词：骨间前动脉骨间前静脉外科皮瓣创面修复前臂

锚杆-混凝土预制格网结构的护岸稳定性数值分析

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中国农村水利水电 2024年第6期 203-208页

作者：周丁曾敬龙杨嘉兴刘延飞程永舟湖南省水运建设投资集团有限公司湖南长沙410118 中交二航局第三工程有限公司江苏镇江212000 长沙理工大学水利与环境工程学院湖南长沙410114

粉细砂土壤由于其特殊的物理性质和易侵蚀的特点,使得粉细砂岸坡的护岸结构至关重要。以湘江部分粉细砂河岸为研究对象,考虑其降雨频率高,河流流速大,河岸易受冲刷的特性,利用有限差分软件FLAC3D,结合所选河段粉细砂岸坡的地形及土体性... 详细信息

粉细砂土壤由于其特殊的物理性质和易侵蚀的特点,使得粉细砂岸坡的护岸结构至关重要。以湘江部分粉细砂河岸为研究对象,考虑其降雨频率高,河流流速大,河岸易受冲刷的特性,利用有限差分软件FLAC3D,结合所选河段粉细砂岸坡的地形及土体性能参数,提出锚杆-混凝土预制格网护岸结构,建立三维岸坡防护数学模型,探讨该护岸结构对岸坡稳定性的影响。结果表明,锚杆拉力以及预制格网自重作用下,应力场呈带状分布,锚杆-混凝土预制格网护岸结构极大程度限制了土体水平方向的位移,减弱了岸坡塑性区以及最大剪切应变增量带的发展,岸坡稳定性安全系数显著提高,锚杆长度和入土角度对提高粉细砂岸坡的整体稳定性有显著影响,锚杆长8 m,入土角度为30°的锚固方案可供实际工程参考。

关键词：粉细砂岸坡数值分析锚杆-混凝土预制格网岸坡稳定性

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基于灰色关联分析法的电力基建施工普通基础作业安全风险评价方法

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电工技术 2024年第2期 199-201,205页

作者：熊家敏丁宙国网宁波市镇海区供电公司浙江宁波315000

目前电力基建施工基础作业安全风险评价方法中,大多基于主观观测指标进行评价,缺乏对于评价指标权重的调整,导致评价效果不佳。为此提出基于灰色关联分析法的电力基建施工普通基础作业安全风险评价方法,识别电力基建施工的安全风险因素... 详细信息

目前电力基建施工基础作业安全风险评价方法中,大多基于主观观测指标进行评价,缺乏对于评价指标权重的调整,导致评价效果不佳。为此提出基于灰色关联分析法的电力基建施工普通基础作业安全风险评价方法,识别电力基建施工的安全风险因素,构建基于灰色关联分析法的评价模型,选取不同项目评价指标,采用熵权法调整评价指标权重,得出安全风险评价分数。设计对比实验进行验证,结果表明灰色关联分析法的安全风险评价方法的评价分数误差较小,具备较优的评价效果。

关键词：电力基建普通基础作业安全风险评价灰色关联分析法

Study on coupled vibration characteristics of a cylindrical container with multiple elastic annular baffles

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Science China(Technological Sciences) 2012年第12期55卷 3292-3301页

作者： WANG JiaDong zhou ding LIU WeiQing College of Civil Engineering Nanjing University of TechnologyNanjing 210009China

The coupled vibration characteristics of multiple elastic annular baffles of the same inner radius in a partially liquid-filled rigid cylindrical container were studied. The liquid domain was divided into several simple sub-domains so that the liquid velocity potential in each liquid sub-domain was of class C 1 with continuous boundary conditions. Based on the superposition principle, the general solution of the liquid velocity potential corresponding to each liquid sub-domain was obtained by means of the method of separation of variables. The coupled modes of the multiple elastic annular baffles were expressed in terms of dry-modal functions. The free surface condition, the interface conditions and coupled vibration conditions were expressed in terms of Fourier series along the liquid height and Bessel series in the radial direction, respectively. Stable and fast numerical computations were investigated by the convergence study. Excellent agreements have been achieved in the comparison of re- suits obtained by the proposed approach with those given by the finite element software ADINA. The natural frequencies and mode shapes versus the position, the inner radius and the number of the annular baffles were thoroughly discussed.

关键词： liquid-container interaction sub-domains multiple baffles sloshing mode bulging mode

Hydrothermal synthesis of Ce: Lu_(2)SiO_(5) scintillator powders

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Journal of Rare Earths 2009年第5期27卷 801-805页

作者： YUN Ping SHI Ying zhou ding XIE Jianjun Department of Electronics and Information Materials School of Materials Science and EngineeringShanghai UniversityShanghai 200072China

The synthesis of cerium-doped lutetium oxyorthosilicate(LSO)polycrystalline powders was investigated by a hydrothermal *** precursor was obtained by the hydrothermal reaction of Lu(NO_(3))_(3)with Na_(2)SiO_(3)at 200℃for 10 h by using urea as precipitator,fol-lowed by a calcination uader proper *** results of XRD indicated that the precursor was crystallized into A-type LSO phase at 1000℃,and transfetrred to B-type LSO phase when temperature was raised above 1050℃.After being heated at 1250℃for 2 h,single phase of B-type LSO powder was synthesized with homogeneous distribution of particle size ranging from 200 to 300 *** photolumi-nescence spectrum of as-synthesized LSO:Ce powders showed a typical broad emission peak centered at 404 nm,corresponding to the 5d^(1)-4f transition of Ce^(3+).

关键词： lutetium oxyorthosilicate scintillator hydrothermal luminescence powder rare earths

Nonlinear semi-analytical modeling of liquid sloshing in rectangular container with horizontal baffles

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Applied Mathematics and Mechanics(English Edition) 2023年第11期44卷 1973-2004页

作者： Xun MENG Ying SUN Jiadong WANG Ruili HUO ding zhou College of Civil Engineering Nanjing Tech UniversityNanjing 211816China School of Transportation and Civil Engineering Nantong UniversityNantong 226019Jiangsu ProvinceChina Faculty of Civil Engineering and Mechanics Jiangsu UniversityZhenjiang 212013Jiangsu ProvinceChina

A nonlinear semi-analytical scheme is proposed for investigating the finiteamplitude nonlinear sloshing in a horizontally baffled rectangular liquid container under the seismic *** sub-domain method is developed to analytically derive the modal behaviors of the baffled linear *** viscosity dissipation effects from the interior liquid and boundary layers are *** the introduction of the generalized time-dependent coordinates,the surface wave elevation and velocity potential are represented by a series of linear modal *** infinite-dimensional modal system of the nonlinear sloshing is formulated based on the Bateman-Luke variational principle,which is further reduced to the finite-dimensional modal system by using the NarimanovMoiseev asymptotic *** base force and overturning moment induced by the nonlinear sloshing are derived as the functions of the generalized time-dependent *** present results match well with the available analytical,numerical,and experimental *** paper examines the surface wave elevation,base force,and overturning moment versus the baffle parameters and excitation amplitude in detail.

关键词： rectangular container nonlinear sloshing baffe sub-domain multi-modal method

Sonochemical Synthesis of Graphene Oxide-Wrapped Gold Nanoparticles Hybrid Materials:Visible Light Photocatalytic Activity

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中国化学:英文版 2015年第1期33卷 119-124页

作者： Yi Cui ding zhou Zhuyin Sui Baohang Han National Center for Nanoscience and Technology Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Graphene oxide(GO)-wrapped gold nanoparticles(Au NPs)hybrid materials are constructed via one-pot sono-chemical synthesis and self-assembly,using ethylene glycol as the reducing *** synthesis process above took only 1 h,and the obtained hybrid materials exist as spheres wrapped with gauze-like GO sheets via ionic in-teraction-based *** GO sheets are helpful for the well dispersion of the Au ***,these materials possess enhanced photocatalytic activity under visible light irradiation,owing to the synergistic effect of the two components in the hybrid *** work may provide a convenient approach to control the size and morphology of the Au NPs for the synthesis of GO-wrapped hybrid materials,which opens up a feasible way to synthesize metal NPs/GO ***,this method might lead to developing of a broad class of new functionalized materials wrapped with GO sheets.

关键词： graphene oxide gold nanoparticle sonochemical synthesis metal hybrid material photocatalysis

Electronic Structure and Catalysis on (001) Polar Surface of Cubic Zirconia

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Chemical Research in Chinese Universities 2010年第3期26卷 460-464页

作者： SHEN Pei-jun ding Wei-zhong zhou Yu-ding HUANG Shao-qing Department of Materials Science and Engineering Shanghai University Shanghai 200072 P. R. China

The electronic structure of （001） polar surface of cubic zirconia was studied by GGA（WC） approximation. We found the cubic lattice near （001） surface showed an intensive tendency to transfer to tetragonal lattice. The metallic state appeared on both the terminations. For O-termination, some O2p states were vacated and hole carriers concentrated on surface oxygen-ions. For Zr-termination, some Zr4d states became partial occupied for the loss of O2p states. We observed the hole states were mainly localized at the corresponding ions on surface for both the terminations, while the charge states on Zr-termination were dispersed on surface.

关键词： Polar surface Electronic structure Hole/charge distribution Cataylsis Article