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How to resolve the coupling problem between the air quality and the indoor thermal environment, especially how much fresh air can assure the indoor air quality, how to design control system to satisfy the need of fresh air, and how to track the change of the air quality in the civil air defence underground engineering at real time were studied thoroughly in this paper.
摘 要 本文就如何解决人防工程内空气品质和工程内热湿环境的耦合性问题进行一定研究,尤其对人防地下工程需要多少新风量才能满足工程内空气环境品质;如何设计控制系统以满足工程内的新风需求;如何实时跟踪工程内空气品质的变化进行了深入研究。
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The static model of torsion joint is based on that of bending joint. The effects of structure parameters inside air pressure, initial angle, rube average radius, rube shell thickness on the turning angle are analyzed and the following conclusions are drawn: the relationship between the angle of torsion joint and the inside air pressure is basically linear, the angle of torsion joint increases with the initial angle and rube average radius, the angle of torsion joint decreases while the rube shell thickness increases. The kinetic equation is built for torsion joint. Simulating experiment implies that the time of inflating and deflating process is extremely shorter than that of kinetic process. So the pneumatic process can be ignored in actual system design and control. The factors that affect the dynamic features of torsion joint, such as shell thickness of rubber tube, average radius, initial angle, connector's outlet area, moment of inertia and viscous damping coefficient, are analyzed and the following conclusions are drawn: the change of rube shell thickness has no effects on the dynamic process of FPA inside air pressure while greatly affects the turning angle of torsion joint; when the rube shell thickness is small, the torsion joint has a bigger turning angle, no overshoot and long risetime, when the shell thickness is big, the turning angle of torsion joint is small, but has high response speed, overshoot and low shock; when the rube average radius increases, the turning angle of torsion joint increases and the overshoot increases too; when the initial angle of torsion joint is big, the turning joint is big, the overshoot is small and shock is low, but the risetime is big; the connector's outlet area affects the dynamic process of FPA inside air pressure greatly, but has no effects on the dynamic process of turning angle; moment of inertia and viscous damping coefficient have no effects on the dynamic process of FPA inside air pressure, but affect the dynamic process of turning angle greatly.
在弯曲关节模型推导的基础上,建立扭转关节的静态模型,并分析了扭转关节内腔压力,初始转角,橡胶管平均半径,橡胶管壁厚等参数对关节转角的影响,得出扭转关节的转动角度与充入FPA内腔的压缩气体压力之间基本呈线性关系,扭转关节的转角随初始角度和橡胶管平均半径的增大而增大,扭转关节的转角随橡胶管壁厚的增大而减小的结论;建立了扭转关节的动力学方程,仿真实验表明FPA的充放气过程与扭转关节的动力学过程相比时间极短,在实际系统设计和控制过程中可以忽略不计;分析讨论橡胶管壁厚,平均半径,初始角度,气体节流口面积,转动惯量,粘性阻尼系数等因素对扭转关节动态特性的影响,得出橡胶管初始壁厚的变化对扭转关节FPA内腔压力的动态响应几乎没有影响而对关节转角的响应曲线影响比较明显,壁厚较小时,关节可以得到较大的转角,并且转角的响应曲线没有超调,但上升时间长,壁厚较大时,关节转角变小,响应加快,但是有超调和轻微振荡现象,橡胶管平均半径越大,得到的关节转角越大,但是转角响应的超调量也随之增大,FPA的初始角度越大,关节的转角越大,并且超调量减小,振荡减弱,但是上升时间增大,管接头出口面积的大小对关节FPA内腔压力的建立过程影响较大,但对关节转角的动态响应几乎没有影响,转动惯量和粘性阻尼系数对FPA内腔压力的动态过程几乎没有影响而对扭转关节转角有较大影响等结论。
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The 20S catalytic core of the 26S proteasome has the shape of a barrel made of four rings which are composed of seven differentαsubunitsα_1-α_7 at two outer rings and seven differentβsubunitsβ_1-β_7 at two inner rings at which the catalytic sites locate. Three of theβsubunits contain proteolyses sites, which are sequestered in the hollow interior of the 20S particle. Substrates enter the 20S through a narrow channel formed by theβsubunits, whose N-termini, depending on their conformation, can either obstruct or allow substrate entry and thus function as a gate. This entry channel is narrow and only permits passage of unfolded, linearized polypeptides.
哺乳动物26S蛋白酶体是由一个20S催化颗粒(catalytic particle,CP)和两个19S调节颗粒(regulatory particle,RP)组成的ATP(adenosine-triphosphate,ATP)依赖性蛋白水解酶复合体。20S CP是26S蛋白酶体的催化核心,它是由4个圆环堆叠形成的桶状复合物,其中两侧外环每个环是由α_1-α_7亚基组成,两个内环每个环是由β_1-β_7亚基组成,4个环的中央形成一个狭窄的内腔。2个β内环形成了20S CP的催化中心空腔,其内壁为催化活性位点所在地;外侧α环中心的孔道是底物到达催化中心空腔的通道,一般被α亚基上的N末端所封闭,阻止胞内非目的靶蛋白进入20S CP内被降解破坏。
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Coefficient distribution of the APIDCSF is similar to that of circular quincunx Neville filter and its interpolating performance outperforms the Neville filters with high orders vanishing moments.The aim of bidimensional interpolating is to diminish the error between the true value and the estimated one.
二维内插的质量是以预测值与真值之间的误差来衡量的,按照最小均方误差的准则,利用二维自相关函数模型和环形内插滤波器的系数分布特点构造了最小均方误差意义上的环形最优内插器,实验证明了全相位离散反余弦内插器近似于最优内插器。
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The injective rings play an important role in the study of rings and categories of modules . First , we introduce the notion of ann-injective rings and CT-injective modules .Second,we make an inquiry into a series of their properties.Third,we give the definition of homological dimension of CT-injective modules.At last,we give the definition of FGT rings which is the extension of cogenerator rings.
本文对环与模范畴中一重要的模类—内射模进行了延拓,引入了ann -自内射环以及CT -内射模的概念,探讨了它们一系列的性质,并定义了CT -内射模的同调维数,最后对余生成子环进行推广得到了FGT -环,讨论了它与CT -内射环的关系以及它的一些性质。
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A nonlinear eddy-viscosity turbulent flow model, which adopted third-order correlation of stress tensor and strain tensor, was modified and applied to flow computing of turbulent flow of internal combustion engine.
把采用了应力张量和应变张量的三阶相关关系的一个非线性涡粘度湍流模型进行修正后应用于内燃机缸内湍流流动计算,用此模型对几种ω形凹坑燃烧室内燃机汽缸内的流动进行计算,特别考查不同结构燃烧室内各处的湍能的变化,给出了燃烧室结构对缸内湍能影响结果,结果表明,凹坑结构时内燃机缸内湍能的分布和平均湍能的大小影响很大,可适当调整燃烧室结构来改变缸内湍流结构。
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Measured tie a kind of lactone, take the propanol - four hydrogen fu nan - water (1:15:84) as the flowing, take the maidenhair tree lactone, gingko lactone A, gingko lactone B, gingko lactone C as the comparison, with evaporation light scattering detector examination computation.
测萜类内酯,以正丙醇-四氢呋喃-水(1:15:84)为流动相,以白果内酯、银杏内酯A、银杏内酯B、银杏内酯C为对照品,用蒸发光散射检测器检测计算。
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In this paper, we study syzygies of injective resolvent s and cosyzygies of injective resolutions, and probe the relationship of injective resolvent s and injective resolutions, and then prove that if R is a Noetherian ring with id≤n, then every left R-module has injective dimension at most n or ∞.
研究了内射预解式的合冲模与内射分解式的上合冲模,并探讨了内射预解式与内射分解式之间的联系,证明了如果环R是Noether环且id≤n,则每个左R-模的内射维数小于等于n或者为∞。
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It has a microcontroller peripheral devices are connected to high-speed bus connections within the connection interface and memory card connection interface, the micro-controller memory card interface, high speed bus interface to connect external devices and virtual within the integrated drive electronics interface module, and the virtual integrated drive electronics interface module includes an integrated drive electronics interface to the virtual host and virtual device side, and when the host side of the card reader connected to the memory card storage or read the instructions issued, the command will be sent to Xuni integrated Shi-driven electronic interface module, and in which the instruction to complete, while the memory card of the information on the transmission to achieve high speed Waiwei components provided within the connecting bus transfer rate, and the host will think that reader is integrated drive electronics interface devices, not just within the high-speed peripheral devices connected bus devices.
其具有微控制器分别连接有高速外围元件内连接总线连接接口及存储卡连接接口,而微控制器具有存储卡接口、高速外围元件内连接总线接口及虚拟整合式驱动电子接口模块,且虚拟整合式驱动电子接口模块包括有整合式驱动电子接口的虚拟主控端及虚拟装置端,而当主机端对读卡机所连接的存储卡下达储存或读取的指令时,该指令会传送至虚拟整合式驱动电子接口模块,并在其中将指令完成,而存储卡内的资料于传输时可达到高速外围元件内连接总线所提供的传输速率,且主控端会认为读卡机为整合式驱动电子接口装置,而非单纯的高速外围元件内连接总线装置。
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Results 20 cases of CT examination had made proper diagnoses,the CT imaging finding about the most of peripheral cholangiocarcinoma included:There was the atactic low density tumour in liver,its borderline was unclear,enhanced scan appearances were irregular peripheral enhancement,centripetal enhancement,and delaying enhancement;There was concretion and dilatation of bile buct in or around the focus;The local envelope of liver was lacunose and the local liver was atrophied,There was abroad putrescence and liquescence in the focus.
结果 20例CT做出了正确的诊断,大部分周围型胆管细胞癌的CT表现为肝内不规则低密度肿块边界欠清,增强扫描表现病灶边缘呈不规则环状强化,有向心性强化的趋势,出现延迟强化;病灶内或周围可见结石,病灶内及周围肝内胆管扩张;局部肝包膜回缩、肝叶萎缩,病灶内大片坏死、液化。
- 推荐网络例句
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Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.
在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。
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In fact,I've got him on the satellite mobile right now.
实际上 我们已接通卫星可视电话了
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The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.
世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。