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Firstly, the establishment of model requires sophisticated neurointerventional techniques and costly interventional materials(sacculus, minikin circlip ring, endovascular electrocoagulation), it not only consumed time but also increased the resesrch expense ; Secondly, although the Massoud model is the first successful model that contain the nidus, but it is far from mimicking the high-flow fistulae frequently observed in a brain AVM; Thirdly, the rapid spontaneous thrombosis result in fistula occlusion in a short time;Fouthly, the model's natural course and the long–term patency of fistula are unclear;Currently the model is only used for the short-term research.

但Massoud模型目前存在以下主要缺点:第一,模型的建立需要复杂的神经介入技术和昂贵的介入材料(球囊、微弹簧圈、血管内电凝等),操作费时,又大大增加了研究费用;第二,Massoud模型虽然首次具备了畸形血管团,但它远不是我们临床上常见的含有高流量动静脉瘘的脑AVM;第三,颈动静脉吻合口自发性血栓形成进而导致引流静脉闭塞的机率很高;第四,Massoud模型的长期自然过程和动静脉吻合口的长期通畅性尚不清楚,目前仅仅作为急性期模型。

Firstly, the equation for stress intensity factors under static uniform pressure is used as the reference case, and then the weight function for a thick-walled cylinder containing a radial edge crack can be worked out. Secondly, the dynamic stresses in uncracked thick-walled cylinders are solved under internal impulsive pressure by using mode shape function method. The solution consists of a quasi-static solution satisfying inhomogeneous boundary conditions and a dynamic solution satisfying homogeneous boundary conditions, and the history and distribution of dynamic stresses in thick-walled cylinders are derived in terms of Fourier–Bessel series. Finally, the dynamic stress intensity factor equations for thick-walled cylinder containing a radial edge crack subjected to internal impulsive pressure are given by dynamic weight function method.

首先采用静态内压下的应力强度因子作为参考解,得到了带径向边裂纹厚壁圆筒的权函数;然后用振型函数方法推导无裂纹厚壁圆筒在冲击内压下的动应力响应,分析中将相应的弹性动力学方程解分为满足非齐次边界条件的准静态解和满足齐次边界条件的动态解的叠加,利用傅立叶-贝塞尔级数展开,推导出了厚壁圆筒内动应力的响应历程和分布规律;最后由动应力权函数方法导出带径向边裂纹厚壁筒在冲击内压下的动态应力强度因子计算公式。

Through the analysis of characteristics in curve of deformation tests on the four kinds of rockmasses such as claystone, siltstone, feldspar-quartz sandstone and lithic sandstone underlain the dam foundation of Tingzikou Hydropower Station, it is thought that: the test deformation of thick lithic sandstone is mainly caused by slippage deformation of rock crystal lattice ; the test deformation of feldspar-quartz sandstone is mainly from small crevices in rock, compressive deformation of rock small holes and slippage deformation of rock crystal lattice; and the test deformation of thin layer claystone in which horizontal layer is developed and siltstone is mainly from compression deformation in interlayer, small crevices in rock, compression deformation of rock small holes and slippage deformation of rock crystal lattice.

通过对亭子口水利枢纽工程坝基下卧的黏土岩、粉砂岩、长石石英砂岩和岩屑砂岩等 4 种主要岩性的岩体变形试验曲线特征进行分析,认为:厚层岩屑砂岩的试验变形量主要来自于岩石晶格错动变形,长石石英砂岩的试验变形量主要为岩石内孔隙和空隙变形以及岩石晶格错动产生的变形,而层理较发育的薄层黏土岩和粉砂岩的试验变形量主要由层间压缩变形、岩石内孔隙和空隙变形以及岩石晶格错动产生的变形共同组成。

In this system, EOG signals produced by the user's eye saccade movements are recorded through electrodes placing on the face, and then the signals are reconstructed and analyzed in real time. By constantly monitoring the electrooculogram signal of the user, the eye mouse is able to recognize several intentional eye motions and in turn, control the cursor on the computer screen.

在此系统中,眼动波讯号是使用者眼睛移动、注视所产生的,而眼动波是透过贴附在脸上的电极所量测到,电极量测到的讯号再即时的经过讯号处理与分析,藉由持续性的的量测眼动波讯号,眼滑鼠系统能够辨识多种眼睛刻意移动的讯号,透过此讯号能够控制电脑上的游标来做动作。

A measuring approach of pressure oscillation has been developed and experiments are conducted in a 10 liter two-dimension air-lift loop reactor. The experimental results show that the local mass transfer parameters have close relationship with the operating conditions, the structure of ALR and the properties of the reaction systems. A series of measurements of pressure pulse indicate that a gas distribution zone exists near the gas sparger, and in this zone the responding signals of pressure pulse are different with the signals measured in other parts of the reactor.

对不同结构的环流反应器的局部流体动力学和传质动力学特性进行了研究,利用压力传感器测量了空气-水、空气-NaCl水溶液、空气-Na〓SO〓水溶液、空气-葡萄糖水溶液和空气-乙醇水溶液五种体系,在不同气速下,不同位置的压力脉动信号,通过随机信号的数学分析,得到压力脉动信号的频谱特性,并依据压力脉动信号的频谱特性的分析给出环流反应器气体分布区的范围。

Consider to make clear in recent years, second acid is calcic - Bowman does not move bacillus clinical bacterium of single born of the same parents of the detached rate that go up and verdigris holiday comparatives, have the tendency that year after year rises, the fundamental condition pathogenic bacteria that already became the infection inside the courtyard [1] , have to a variety of antibacterial content be able to bear or endure higher property of a medicine [1, 2] , for this, we are monitored and statistic analysed my courtyard to came 1998 2004 7 years a second acid is calcic - the clinical infection condition that Bowman does not change bacillus, to 14 kinds of antibacterial content be able to bear or endure property of a medicine and be able to bear or endure medical tendency, sum up a report to be as follows now. 1 material and method all data all come from 1.1 basic materials to came on January 1, 1998 my courtyard outpatient service was mixed on December 31, 2004 the specimen sending check of inpatient, via clinical microbiology the lab is fostered and classics appraisal is second acerbity calcium - Bowman does not move bacillus to affect case of illness, with clinical and commonly used antibacterial at the same time content makes the kill that medical quick detects. 1.2 bacteria appraisal is mixed medical quick experiment uses live thing VITEK32 of Mei Li dust is full automatic the bacterial appraisal of bacterial analysis system and its form a complete set gets stuck and medical quick card undertakes detecting, 1998~2000 year use GNI appraisal gets stuck, 2001~2004 uses GNI+ card.

近年探究表明,乙酸钙-鲍曼不动杆菌临床上的分离率和铜绿假单胞菌相当,并有逐年上升的趋向,已成为院内感染的重要条件致病菌[1],对多种抗菌药物有较高耐药性[1,2],为此,我们监测并统计分析了我院1998年至2004年七年间乙酸钙-鲍曼不动杆菌的临床感染情况,对14种抗菌药物的耐药性及耐药趋向,现总结报道如下。1材料和方法1.1基本资料所有资料均来自于1998年1月1日至2004年12月31日我院门诊和住院病人的送检标本,经临床微生物学实验室培养并经鉴定为乙酸钙-鲍曼不动杆菌感染病例,同时以临床常用抗菌药物作药敏检测的结果。1.2细菌鉴定和药敏试验采用生物梅里埃VITEK32全自动细菌分析系统及其配套的细菌鉴定卡和药敏卡进行检测,1998~2000年使用GNI鉴定卡,2001~2004使用GNI+卡。

At constant viscosity, by increasing the liquid flow rate, the liquid film's velocity is increased; at the same experiment condition, the frequency of the liquid film is same at the same radial direction; the air current has minimum effect on liquid film bottom flow velocity, while it has an obvious effect on liquid film surface flow velocity. The longer the distance between liquid film and the inlet, the lower the pulsatory frequency and longer the wavelength.

在粘度基本不变的情况下,随着液体质量流率的增加,液膜流动速度随之增加;在同一个实验条件下,沿圆管径向各质点的频率基本保持不变;气流场速度对液膜底层流动速度影响很小,对于液膜表面流动速度有着较大的影响;沿液膜流动方向,液膜的脉动速度逐渐增加,脉动频率降低,脉动波长变长,与报道的通过快速摄像得到的液膜发展趋势一致,证实用PDA研究液膜流动是可行的。

Finally, the adaptive control strategy of active balancing for a strictly positive and real rotor with actuator saturation is successfully extended to a flexible rotor with single collocated plane and actuator saturation and a flexible rotor with multiple collocated planes and actuator saturation. A series of numerical simulations show that the proposed adaptive control law can evidently reduce the original imbalance-induced vibration of these rotors and the actuator movement asymptotically approaches to its target value, the opposite of the original imbalance.

最后,把提出的自适应控制策略成功地推广到带作动器饱和、单并置平面的柔性转子和带作动器饱和、多并置平面的柔性转子,一系列数值模拟显示:该控制律能显著减小这些转子原始不平衡引起的振动,作动器的移动能渐近收敛到与原始不平衡相反的目标值。

Results show that the performance of this VCRT basically reaches the original objective,which indicates that a convergent-divergent blade passage in the high pressure rotor and a convergent-divergent meridian plane of the VCRT are suitable for the VCRT.

结果表明,对转涡轮各方面性能基本达到了设计目标,说明高压动叶采用收扩型叶栅通道且整个涡轮子午流道也采用收扩结构的设计可以获得满意性能;三排叶片仍有改进余地,即涡轮效率还有进一步提升的潜力;高压动叶出口沿整个叶高均为超声速,出口马赫数节距平均值在1.4~1.6之间;高压动叶尾缘斜激波强度以中展为中心向两侧递减;涡轮性能随出口背压的增加而下降;涡轮出口背压的变化对高压转子性能基本没有影响,但对低压转子性能的影响较大。

Furthermore, the other focal point of train operation adjustment, to adjust train unit routing, is studied comprehensively. First the difference between the primary plan and the adjustment plan of train unit is discussed, and then the working process of making optimal adjustment plan is studied based on some adjustment principles which are set based on the adjustment goal.

动车组折返交路的调整是高速铁路列车运行调整的两个重点之一,本文对该问题进行了较为全面的研究,首先分析了动车组运用计划与调整计划的区别,然后根据调整目标制定了调整原则,在此基础上研究了动车组调整计划优化编制的工作流程。

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