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Meanwhile, it could be seen that there does not exist a confidence interval with width less than 0.5 because of the property of Poisson distribution. Based on these conditions, the author mainly carried out research into two aspects of this problem as follows. Firstly, by numerical and theoretical analysis, the author compares some existent confidence intervals, for example,"exact" confidence interval, Wald confidence interval and Bayesian confidence interval, and finds some deficiencies points of the confidence intervals, whose modification version has been proposed .Also, several better confidence intervals such asare also presented .Secondly, for given confidence coefficient and interval width, the author constructs a class of asymptotical two-stage interval estimate procedures. At the same time, under varies restriction of confidence coefflcientent interval width, the optional sample size of the first stage has been computed by numerical computation. The numerical computation shows that the method considered in this dissertation have good properties and applied value.

同时,由于Poisson分布的特性,我们知道不存在其参数区间长度小于0.5的置信区间,基于这些情况,我们主要展开了以下两个方面的研究:一是利用数值计算分析与理论分析的方法对现有的若干置信区间如"精确"置信区间,Wald置信区间,Bayes置信区间等进行分析比较,发现了一些缺陷,针对这些缺陷,我们进行适当的修正,并得到几种性质较好的置信区间如:修正大样本区间Jeffreys原则下置信区间二是针对已给定的置信系数与区间长度,我们提出了一种渐近的两阶段区间估计程序,并利用数值计算的方法,在各种置信系数与区间长度限定下,算出了最优的第一阶段观测次数,大量数据表明,本文考虑的方法性态良好,具有应用价值。

Owing to the properties of wavelet packet functions such as compact support in time domain, localization in frequency domain and orthogonalities, the performance of the proposed system is enhanced greatly.

为了节约系统带宽,论文提出了小波包函数的"有效支撑长度"的概念,通过合理调节"有效支撑长度"上的小波包函数的长度达到节省系统带宽的目的。

The use of footscan balance test system of national high-level pistol, rifle shooters had a balance of stability tests, by analyzing the following major conclusions: First, all the athletes in men's pistol shooting athletes body posture and adjusting the balance of stability the capacity of the worst; the second, firing only state body sway eyes open area and before and after the shaking smaller decrease; and thirdly, the general balance of the stability of indicators (both before and after the body center of gravity, around shaking rate, trajectory length, shaking the area) can not accurately reflect the high level of shooting athletes balance the characteristics of stability, and derived indicators - per unit area of the track length (the total length of track and shaking the area ratio), both show the balance of stability, but also reflect the attitude adjustment ability, in the sway area certain circumstances, the greater its value, indicating that ability to regulate the more intense the frequency of shaking sooner, the better the stability of physical balance, in the actual shooting of firearms at the time of the impact of the smaller, can be used as shooting athletes evaluation and selection of indicators.

运用footscan balance测试系统对国家高水平手枪、步枪射击运动员进行了平衡稳定性的测试,通过分析得出以下主要结论:第一,所有射击运动员中男子手枪运动员身体姿态的平衡稳定性及调节能力最差;第二,射击训练只能使睁眼状态下身体晃动面积和前后晃动幅度减小;第三,一般平衡稳定性指标(身体重心前后、左右晃动幅度、轨迹长度、晃动面积)不能准确地反映高水平射击运动员平衡稳定性的特点,而派生指标——单位面积的轨迹长度(轨迹总长度与晃动面积的比值),既显示平衡稳定性,又能体现姿态调节能力,在晃动面积一定的情况下,其值越大,表明调节能力越强,晃动的频率越快,身体平衡稳定性越好,在实射时对枪支的影响越小,可作为射击运动员的评价和选材指标。

Methods One hunderd amd ten human subjects (one hunderd and seventy-four eyes) were included in this research. Retinoscopy was made to measure refractive errors, corneal topographer was measured by corneal topography system, Tonometry was used to measure IOP, Ultrasonagraphy was applied to measure anterior chamber length, len thickness and vitreous length respectively, Laser interference biometer was used to measure axial length, Optical coherence tomography was used to measure retina thickness of fovea area. Based on spherical equivalent subjects were divided into four groups: emmetropia group (SE0.50D), low-myopia group (-0.50D≤SE3.00D), moderate myopia group (-3.00D≤SE6.00D) and high myopia group (SE≥-6.00D).

对近视患者及正视者110例(174只眼),主觉加检影验光行屈光检查,采用Humphrey测量角膜平均曲率,非接触式眼内压测量仪测量眼内压;A与B型超声诊断仪测量前房深度、晶状体厚度、玻璃体腔长度及眼轴长度;角膜测厚仪测量中央角膜厚度(CCT,centercornealthickness);光学相干生物测量仪测量眼轴长度;光学相干断层扫描仪测量黄斑中心视网膜厚度;按等效球镜度数(SE, sphericalequivalent)不同分正视组(SE0.05D)、轻度近视组(-0.50D≤SE3.00D)、中度近视组(-3.00D≤SE<-6.00D)、高度近视组SE≥-6.00D)。

Influences of basic component (fiber, redispersable emulsoid powder, water-retentive admixture, expansive admixture, mixture and cement-to-sand ratio )of Dry-mixed Mortar on essential performance of mortar have firstly been summarized. The results show that :(1) After fiber is mixed into Dry-mixed Mortar , toughness ,crack resistance and unpermeability of mortar will be improved; Influence of different length mixed fiber on toughness of mortar precedes single-length fiber, but influence on crack resistance of mortar is the same.

该文首先研究了干拌砂浆的基本组分:纤维、可再分散乳胶粉、保水剂、膨胀剂、掺合料以及灰砂比对砂浆的基本性能的影响,结果表明:(1)在干拌砂浆中加入短切纤维,可以使砂浆的韧性得到改善,提高砂浆的抗裂性、抗渗性;不同长度的纤维进行混杂后对砂浆韧性的提高比单一长度纤维具有更好的效果,但对砂浆抗渗性的改善效果与单一长度纤维差别不大。

Also using inseam length as a guide, this formula calculates 88.3% of your inseam length and uses it to measure the distance from the centre of the bottom bracket to the top of the seat height.

也是利用inseam长度作为指标,主要是BB到坐垫最高位置的长度是inseam长度的88.3 %。

If pulley keyway length is less than this length, rework long key by removing one-half of excess length between pulley and end of key to maintain balance.

如果皮带轮的键槽长度小于该长度,则单端去掉皮带轮和键端之间的多余长度,以此保持平衡。

The results are the following: When calculating the motion mass, it is better to use idler's equivalent mass instead of the rotating part mass and serial idler's rotating inertias and equivalent mass are calculated. The accurate analysis result for the deflection curve length of the belt shows: The error calculated by the approximate parabola length is lower than 10〓. Thus the approximate method is accurate enough for calculation. The relations between the running resistances coefficient and the belt velocity are studied by experiment, which are the bases for calculating the linear coefficient values between them.

得出:在计算参与运动质量时对托辊应采用托辊的等效质量而不是目前采用的托辊旋转部分质量,并计算出了系列的托辊转动惯量和等效质量;对输送带的挠曲线长度进行了精确的分析,结果表明:采用近似的抛物线长度计算方法其误差在10〓以下,因而得到在计算输送带挠曲线长度时采用近似的抛物线具有足够的精度;对输送机运行阻力系数与带速间的关系进行的实验研究,得出阻力系数与带速线性关糸的系数值。

Because the length and fluctuation of queue affect network delay and jitter directly, the key point of how to control delay and jitter is to make use of effective method to control the queue length and degrade the queue fluctuation level.

队列的长度及其变化是影响网络的延时和抖动的重要因素,使用有效的方法对队列的长度进行控制并降低队列长度的变化幅度和范围,是控制延时和抖动问题的关键。

Due to the fact that test application time is proportional to the length of the overlapped vector, except that the length of the overlapped vector is far less than the sum of the length of the original individual test vectors, minimal test application time can be obtained.

由于测试应用时间与重叠向量的长度成正比,而重叠向量的长度要远小于原始测试向量的长度总和,从而减少了测试时间。

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