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Thirdly, a new type base isolation system, i. e., slide-limited friction base isolation system is presented in this paper. Based on this system, harmonic and subharmonic periodic response of S-LF subjected to harmonic motion is investigated by using Floquet theory. Dynamic response of sliding structure subjected to earthquake ground motion is calculated with a precise high order direct integration method, and the numerical results are presented in terms of maximum acceleration response spectra of supcrstructure and maximum sliding displacement response spectrum. By comparison with isolating effects of pure-friction base isolation system and resilient-friction base isolation system , it shows that the isolating characteristic of S-LF is superior to P-F and R-FBI. Through analyzing an engineering example, it is observed that the maximum inter-storey shear force and absolute acceleration of sliding structure to earthquake ground motion are very different from those of traditional structures.
提出了一种新型基础隔震模型,即带限位装置的摩擦隔震体系;基于此隔震模型,利用Floquet理论研究地面谐运动下S-LF结构的运动特性;并利用高精度的精细时程积分法,通过对地震作用下S-LF动力响应的计算,绘制了上部结构最大加速度反应谱和基底最大滑移量反应谱,并研究了各种结构参数对隔震的影响;通过与恢复力摩擦隔震系统和纯摩擦力滑移隔震系统的比较表明,S-LF的隔震性能优于P-F和R-FBI;对计算实例的分析发现,地震作用下S-LF结构的层间最大剪力和最大绝对加速度反应分布较一般传统结构有很大区别。
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During the calculation the results got by quintic spline kernel was the best so it was chosen as the proper kernel for the SPH simulation. By comparison of the simulation results got by SPH and finite volume method, it was proved that the buffer cells method proposed in the SPH simulation to implement the Dirichlet boundary conditions was accurate, and this is of great importance for the simulation of flows pass a pipe. At last, the SPH method was improved to simulate the liquid-solid two phase flows and the results show that this method was appropriate for the simulation of flows containing viscous fluid and macroscopic solid components. Now the two methods are both able to predict the continuum flows and rarefied flows severally, but the hybrid program still has some aspects to be improved.
首先用标准算例验证了SPH方法的理论模型和计算程序的准确性;通过比较确定选用五次样条核作为计算低雷诺数下的粘性连续流动时的核函数;采用SPH方法和有限体积法分别对同一管道流动进行了对比计算,证明了本文提出的边界缓冲区方法在实现SPH方法中的流体边界条件时的有效性,解决了SPH方法模拟管道流动时的一个关键问题;巧妙地使用SPH方法对化工分离流动中常见的固液两相流及固液耦合作用进行了模拟尝试,获得了较好的结果;在跨尺度计算方面,目前两个子程序已经能够分别模拟连续的和稀薄的二维管流问题,二者的耦合计算程序还处于调试和优化阶段,各个参数对于计算精度和计算速度的影响规律仍在探索中。
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On the basis of that, one of the important contents of this article is to study the basic principle of criminal law in eye of comparison, meaning detecting all characteristics of criminal law principle by comparison of the basic principle of criminal law to that of constitution and that of civil law, and further checking the old and newly-coming concept of basic principle of criminal law, trying to prepare checking methods for the possibly coming concept of basic principle of criminal law in future.
以此为阶,本文的一个重要内容即是以比较的眼光对刑法基本原则进行研究,即从刑法基本原则与宪法基本原则以及刑法基本原则与民法基本原则的对比分析中找出刑法基本原则的各方面特性,以此进一步检验已有的及新近的提法,并力求对以后刑法基本原则可能出现的提法预备辨认手段。
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On the basis of that, one of the important contents of this article is to study the basic principle of criminal law in eye of comparison, meaning detecting all characteristics of basic criminal law principle by comparison of basic principle of criminal law to that of constitution and that of civil law, and further checking the old and newly-coming concepts of basic principle of criminal law, trying to prepare checking methods for the possibly coming concepts of basic principle of criminal law in future.
以此为阶,本文的一个重要内容即是以比较的眼光对刑法基本原则进行研讨,即从刑法基本原则与宪法基本原则以及刑法基本原则与民法基本原则的对比分析中,找出刑法基本原则的各方面特性,以此进一步检验已有的及新近的提法,并力求对以后刑法基本原则可能出现的提法预备辨认手段。
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On the basis of that, one of the important contents of this article is to study the basic principle of criminal law in eye of comparison, meaning detecting all characteristics of basic criminal law principle by comparison of basic principle of criminal law to that of constitution and that of civil law, and further checking the old and newly-coming concepts of basic principle of criminal law, trying to prepare checking methods for the possibly coming concepts of basic principle
以此为阶,本文的一个重要内容即是以比较的眼光对刑法基本原则进行研讨,即从刑法基本原则与宪法基本原则以及刑法基本原则与民法基本原则的对比分析中,找出刑法基本原则的各方面特性,以此进一步检验已有的及新近的提法,并力求对以后刑法基本原则可能出现的提法准备辨认手段。
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On the basis of that, one of the important contents of this article is to study the basic principle of criminal law in eye of comparison, meaning detecting all characteristics of criminal law principle by comparison of the basic principle of criminal law to that of constitution and that of civil law, and further checking the old and newly-coming concept of basic principle of criminal law, trying to prepare checking methods for the possibly
以此为阶,本文的一个重要内容即是以比较的眼光对刑法基本原则进行研究,即从刑法基本原则与宪法基本原则以及刑法基本原则与民法基本原则的对比分析中找出刑法基本原则的各方面特性,以此进一步检验已有的及新近的提法,并力求对以后刑法基本原则可能出现的提法准备辨认手段。
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On the basis of that, one of the importantcontents of this article is to study the basic principle of criminallaw in eye of comparison, meaning detecting all characteristics ofcriminal law principle by comparison of the basic principle of criminallaw to that of constitution and that of civil law, and further checkingthe old and newly-coming concept of basic principle of criminal law,trying to prepare checking methods for the possibly coming concept ofbasic principle of criminal law in future.
以此为阶,本文的一个重要内容即是以比较的眼光对刑法基本原则进行研究,即从刑法基本原则与宪法基本原则以及刑法基本原则与民法基本原则的对比分析中找出刑法基本原则的各方面特性,以此进一步检验已有的及新近的提法,并力求对以后刑法基本原则可能出现的提法准备辨认手段。
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Six experimental stages were designed in our procedure, those are:(1) metabolite recovery and tested sample preparation: the metabolites were recovered by Amberlite XAD-2 absorption, followed by MeOH elution and solvent concentration;(2) antioxidant detection and strain selection: samples were quantitatively analyzed by the inhibition effects on formation of lipid peroxides and TBARS to screen the strains able to produce antioxidants. According to the established screening methods, we chose out a strain of actinomycetes, designed as AMBL-029C;(3) antioxidant purification: the fermentation broth was recovered by a series of separation techniques including centrifugation, Amberlite XAD-2 absorption, followed by MeOH elution and a successive TLC purification. The resulting primary purified compound [temperately designed as AMBL-029C-TS] was further analyzed by HPLC to monitor its purity;(4) physical-chemical characteristics: judging from the acid-base fractionation experiments, and the pH and temperature stability tests, the compound was deduced to be a acidic compound with the properties of low polarity and highly pH and temperature stable;(5) mechanism of the antioxidant: in comparison with some other known antioxidants, TS was subjected to investigate its antioxidant mechanism, together with BHT,-tocopherol, as well as two streptomyces metabolites, homogentisic acid and -phenylpyruvic acid, which were previously isolated as the natural antioxidants in our laboratory.
针对本实验目的,我们设计了以下的实验步骤﹔(1)二次代谢物回收及检测样本处理:我们将发酵所得的培养上清液,利用疏水吸附性树酯Amberlite XAD-2吸附回收,并以甲醇溶离及真空减压浓缩脱水等方式处理,以取得提供抗氧化活性筛选之检测样本;(2)抗氧化活性检测及菌种筛选:以「过氧化脂质」和「硫丙二醯尿」的生成量进行定性定量分析以作为抗氧化物质生产菌筛选之用;经此筛选程序,我们选获了具有抗氧化物质高生产力的菌株,命名为AMBL-029C;(3)抗氧化物质的分离纯化:针对生产菌株的发酵回收处理液,以矽胶薄层色层分离法经物质层析纯化后,并以高效能液相层析法(High performance liquid chromatography;HPLC)分析物质可得一初级纯化物质,命名为AMBL-029C-TS;(4)抗氧化物质的物理化学性质分析:由酸碱转溶(acid-base fractionation)实验得知,此抗氧化物质属於中低极性的强酸性物质,对温度(37℃-100℃)及酸碱度(pH3.0-13.0)均表现出高稳定性;(5)在抗氧化机制探讨方面,我们针对数种不同的抗氧化机制进行探讨,即: 1。
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Through simulation of the real process of thomcolumbar burst fracture and use of modem dynamics techniques, the present study was (1) to investigate the kinetic relationship between structural damage and impact energy absorption and dynamics mechanism of thoracolumbar burst fracture by quantitative analysis of various injured segments;(2) to explore the instability mechanism of L1 vertebral burst fracture and its injury threshold by three-dimensional analysis of the injured segment with stereophotogrammetry in combination of transient physical parameters, anatomy and image;(3) to explore the corresponding relationships between impact energy, geometry parameters and biomechanics by geometry and biomechanical analysis of thoracolumbar burst fracture, which may provide an objective standard for evaluation of spinal injury severity and experimental evidence for adoption of biomechanical treatment in clinic;(4) to evaluate the fixation effect of different instruments and the effect of intervertebral bone graft on segment fixation by analysis of the threedimensional stability of different internal fixation instruments and their decompression of the spinal canal, which may provide experimental evidence for therapeutical selection for thoracolumbar burst fracture in future; and finally to investigate the effect of various instrument fixation on dynamical characteristics by comparison and quantitative analysis of frequency and amplitude responses, which may provide certain theories and experimental evidence for application of vibration test to judge the stability of the spine.
本研究从胸腰段脊柱爆裂骨折发生的实际过程出发,以现代动力学检测及计算机多通道高性能数据采集分析系统等高新技术为基础,实时量化分析损伤节段的工程参数,揭示了结构破坏与能量吸收的变化规律,探讨了胸腰段脊柱爆裂骨折的瞬态损伤机制;利用三维立体摄像技术,对不同损伤程度的节段进行三维运动分析,结合瞬态物理参数、影像学和病理解剖,明确了〓椎体爆裂骨折的失稳机制及损伤阈值;通过对胸腰椎爆裂骨折的几何学变化及生物力学分析,明确了撞击能量与几何参数、几何参数与生物力学的相应关系,为评判脊柱损伤程度提供了客观标准,为治疗中采取适宜的生物力学方法提供了实验依据;通过对比分析不同内固定器械的三维稳定性和对椎管的减压作用,评价不同器械的复位固定作用,同时比较椎体间植骨对节段固定作用的影响,为今后临床胸腰段脊柱爆裂骨折的治疗选择提供依据;利用振动测试与分析技术,比较及量化分析了不同致伤状况的频幅响应特征,比较分析了各种器械固定对动力学特性的影响,为今后临床建立基于振动测试与分析技术判断脊柱稳定性的诊断方法,提供了一定的理论和实验依据。
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The analysis points out, the ability that make and particular star resource advantage invite the medium of major of phoenix new media the careless root with other still immature mate makes video trade inferior by comparison, and the user group with giant PPLive sheds media technology to also invite too inferior to bear comparison of other new media with what precede, such combination will make competitor faces greater pressure.
有分析指出,凤凰新媒体专业的媒体制作能力和独有的明星资源优势让视频行业其他对手尚不成熟的草根制造相形见绌,而PPLive庞大的用户群体和领先的流媒体技术也让其他新媒体望尘莫及,这样的联合将使竞争者面临更大的压力。
- 推荐网络例句
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This one mode pays close attention to network credence foundation of the businessman very much.
这一模式非常关注商人的网络信用基础。
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Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.
扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。
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There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.
双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。