两元

Based on the prior information obtained by qualitative inversion, the two stages inversion method was put forward. That is, the first stage is that distinguishing the high-quality element and non- high-quality element, and determining the initial iteration value of element sound velocity reasonably. The second stage is that treating differentially the constraint weights of the high-quality element and non- high-quality element, and then quantitatively inversing the final sound velocity distribution. The results of two concrete specimens indicate that the two stages inversion method can inhibit artifacts effectively and has better defect identification effect than normal one stage inversion.

在获取定性反演先验信息的基础上，提出了两阶段反演的方法：第一阶段，区分优质像元和非优质像元，合理确定像元声速的迭代初值；第二阶段，区别对待优质像元和非优质像元的约束权重，定量反演最终的速度分布。2个混凝土试件的模型试验表明，两阶段反演能有效抑制伪像，具有比常规的一阶段反演更好的缺陷识别效果。

We can compute three dimensionalvelocity distribution on a planar domain of flow field based on conventional ParticleImage Velocimetryand 3D reconstruction theory of stereophotogrammetry.

在流场空间两个不完全交叠的体积元(映射为两个摄影机象平面上以同名点为中心的两个相同大小的判读小区域)中的示踪粒子的统计性质都能同样表征这两个体积元公共中心的流体运动的假设下，PIV技术与体视三维重建理论的结合，可以将原PIV技术中二维统计平均的概念扩展为三维统计平均，并且在确定体积元公共中心位置之后，直接实现空间流体体元的三维位移重建。

Due to the complexity of the cell jitter, the NonSynchronous Tining Recovery methods are currently not mature With the emphasis being given to the Class A CBR traffic, this paper analyzes the performance of the queueing delay and cell jitter at the source node and intermediate nodes, and discusses the Source Timing Recovery at the destination node in ATM networks Firstly, this paper presents a description of the cell jitter of CBR traffic, and gives the definitions of two kinds of cell jitter regarding the Source Timing Recovery for CBR traffic Then, by using exact mathematical models and analysis methods, this paper analyzes the impact of the factors, such as the capacity of the queueing buffer, the randomness, the deterministic nature and the correlation in cell arrivals of the background traffic sources, on the queueing delay and cell jitter performance of the CBR traffic through Statistical Multiplexitng To obtain an insight into the power spectral distribution and look for better schemes for the depression and filtering of the cell jitter, within the analyses we succeed deriving the power spectrum of the cell jitter for CBR traffic Hence, not only the power spectral distribution of the cell jitter can in the frequency domain be qualitatively understood, but also can the rms (root-meansquare) value of the cell jitter be quantitatively obtained so as to more accurately measure the amplitude of the jitter In the end-to-end performance analysis of the queueing delay and cell jitter, we propose a kind of quasi-periodic cell stream model to characterize the jittered CBR traffic, and present an initial queueing analysis of the CBR traffic following such a model at a generic intermediate node Additionally, we briefly discuss the buildout/playout and Source Timing Recovery functions of the destination node Finally, regarding the Source Timing Recovery of CBR traffic, this paper systematically discusses several important principles of the cell jitter filtering and depression reported in the literature, introduces several implementation schemes of the Source Timing Recovery e.

由于信元抖动的复杂性，非同步定时恢复方法目前还很不成熟。本文针对A类CBR业务流在ATM网络源节点和中间节点的排队时延和信元抖动性能，以及在目的节点的源定时恢复问题作了较为全面的研究。首先，文中描述了CBR业务流的信元抖动，并具体地给出了两种与CBR业务源定时恢复有关的信元抖动的定义。然后，采用了精确的数学模型和分析方法，有针对性地分析了业务背景中信元到达的纯随机性、确定性和相关性以及排队缓存器容量等因素对CBR业务流经过统计复用后的排队时延和信元抖动性能的影响。为了了解信元抖动的功率频谱分布和寻求更好的抑制和滤除抖动的方法，在性能分析中，我们成功地完成了CBR业务流信元抖动的功率谱分析，使得不但可以从频域定性地认识信元抖动的能量分布特性，而且还可以定量地求出信元抖动的均方根值(rms：root-mean-square)，以更为准确地衡量抖动的大小。在CBR业务流的多节点端-端排队时延和信元抖动性能分析中，我们提出了一种准周期性(quasi-periodic)信元流模型来描述感染了信元抖动的CBR业务流，并基于这一模型进行了CBR业务流中间节点的初步排队分析。

Two general points of a 9-inch pizza (one of about 48-58 yuan, quite a variety of flavors, seafood, Extreme, etc., no matter how you choose, and some varieties will be your point), two glasses of drinks (cola cup 9 yuan, two glasses of 18), a grilled chicken wings (19 million), if with a girlfriend, you can point a self-service salad 28 yuan, is to let you take a plate, you first performance How many fruits can be installed, but not to the two back, you must not take into account the face, the more the better it is loaded face plates around you can use to block the fruit, such as watermelon, first Wai a bucket-shaped containers, the middle can be installed on many other fruits a

两人一般点一份9寸比萨饼(一份大约48-58元左右，有好多种口味，海鲜，至尊等等，任你选择，有的品种还会贵一点)，两杯饮料(可乐一杯9元，两杯18元)，烤鸡翅一份(19元)，如果带女朋友，可以再点一份自助沙拉28元左右，就是让你拿一个盘子，你一次性能装多少水果都可以，但不可以来两回，你一定不要顾及面子，装得越多越有面子，盘子四周你可以用方块状的水果，如西瓜，先围个水桶状的容器，中间就可以装很多其他的水果了

According to Mr. Chen introduced the owner of the shop's mineral water and purified water is going high-end line, a barrel of water is 15 yuan, the main clients of Tianhe Sports Center office buildings surrounding the large and medium-sized companies, more single customer water consumption, Guangzhou is also the first two months of the hottest hours,"the diligent and good physical Song Shuigong earn 5,000 yuan a normal, the first two months of each month and two more than 5000 yuan Songshui Gong,""In fact we shop 6 Song Shuigong have an average of more than 3000 yuan per month."

据店主陈先生介绍，该店的矿泉水及纯净水走的是高端路线，每桶水都在15元左右，主要客户是天河体育中心周边写字楼的大中型公司，单个客户用水量较大，前两个月又正是广州最热的时段，&体力好又勤快的送水工挣5000元很正常，前两个月每个月都有两个送水工超过5000元&，&事实上我们店6个送水工平均每月都超过3000元&。

In this paper, eight vat dyes were chosen to study the feasibility of dyeing neutral color with two vat dyes.

本文选取8种还原染料，对以&两元拼色&方式拼染中性色的可行性进行了研究。

But where a two-dollar bettor is given free drinks, a high roller gets everything he wants and more.

不过，一手只押注两元的赌客只有免费的饮料可以喝，&豪客&则能获得一切服务甚至超越他们的要求。

Once while trying to reach his car key, Li Jiacheng dropped a two-dollar coin, which rolled under the car.

一次在取汽车钥匙时李嘉诚不慎丟落一枚两元硬币，硬币随后滚到车底。

On the third and succeeding betting rounds, the bets will be raised in specified increments, for instance, two-dollar increments.

关于第三轮和接替投注，投注将会提升指定递增，例如两元递增。

With two goals to crown a superb performance, Pavel Nedved was the star man bar none in the clash with Pescara, but, ever the perfectionist, he still underlined the areas where the team must improve: I'm happy with the goals, but that's the job of the strikers and if they didn't manage that today I think it was down to too many errors in the final phase.

表现出色，独中两元，内德维德可谓是关键先生。但作为一个完美主义者，他还是强调了球队需要改进的地方。我为自己梅开二度而高兴，但是，进球本应是前锋的职责。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。