平均差

It takesthe weighted average of the L2 norm of the difference of the observation and thesolution of the system and the L2 norm of the difference of conormal derivativeat the different sides of the interface for every subdomain as cost functional andthe smooth coefficients of the subproblem and the value of solution of the originalproblem at interface as identification parameters;Using the property of continu-ous functional defined on compact set,the existence of the optimal solution of theidentification problem is proved;The necessary conditions of optimality charac-terized by the system equation,the adjoit equation and the variational inequalitysimultaneously are given by introducing the conception ofdifferential andadjoit variable;An algorithm is devised and its flow graph is given.

其次，针对分片光滑动力系统的特征，结合正演过程的区域分解算法，建立了分片光滑系统的分解区域参数辨识模型，该模型以子区域上解的实测值与计算值之差的L2范数和界面两侧的通量差的L2范数的加权平均作目标泛函，各子问题的光滑系数及界面上真解的值为待辨识参量；利用紧致集上连续泛函的性质，证明了子区域上参数辨识问题最优辨识参量的存在性；引入微分的概念，借助伴随变量，给出了由系统方程，伴随方程和变分不等式共同表征的最优性必要条件；根据此必要条件设计了算法，给出了算法的程序框图。

Results In the 14 cases, 13 achieved bone union and one nonunion. The mean time of union was 12 weeks. The wrist mean motion range was about 90% of the healthy lateral wrist and mean gripping strength was about 95%. Twelve patients suffered from no pain, one patient from slight pain, and one patient with nonunion from medial pain. According to Cooney's clinical evaluation system, the outcome was fine in 10, good in three and bad in one patient.

结果 14例中有13例愈合，1例不愈合，平均愈合时间为12周，平均腕关节活动度为健侧的90%，握力为健侧的95%，12例患者没有疼痛，1例轻度疼痛，另外l例不愈合有中度疼痛，除1例不愈合患者外，其余都能胜任原有的工作，按Cooney's评分10例优，3例良，1例差。

The mean time of union was 12 weeks. The wrist mean motion range was about 90% of the healthy lateral wrist and mean gripping strength was about 95%. Twelve patients suffered from no pain, one patient from slight pain, and one patient with nonunion from medial pain. According to Cooney's clinical evaluation system, the outcome was fine in 10, good in three and bad in one patient. Conclusion Palm??

结果 14例中有13例愈合，1例不愈合，平均愈合时间为12周，平均腕关节活动度为健侧的90%，握力为健侧的95%，12例患者没有疼痛，1例轻度疼痛，另外l例不愈合有中度疼痛，除1例不愈合患者外，其余都能胜任原有的工作，按Cooney's评分10例优，3例良，1例差。

This paper discusses the estimation method of wave spectrum by covariance functional method.

黄海；平均波高；海浪谱；协方差函数；海浪频谱；本文用协方差函数法探讨了海浪谱的估计方法。

Junior high school students' leisure lifestyles obviously differ by gender, school, grade level, living environment, family structure, parental education, student's average monthly allowances and their family's average monthly allowance.

同性别、学校别、级、居住环境、家庭结构、父亲教育、母亲教育、个人每月平均用及家庭每月平均用的国中生，其休闲生活型态有显著差。

Junior high school students' sense of well-being obviously differs by gender, school, grade level, living environment, family structure, parental education, student's average monthly allowances and their family's average monthly allowance.

同性别、学校别、级、居住环境、家庭结构、父亲职业、父亲教育、母亲职业、母亲教育、个人每月平均用、家庭平均每月所得同的国中生，其幸感有显著差。

On the aspect of error compensation, the system using the geometric average sound pressure instead of the arithmetic average sound pressure to get the sound pressure of the measurement point. This method not only reduces the high frequency error in the sound intensity measurement, which compensates the finite difference approximation error, but also greatly reduces the computation of the sound pressure spectrum.

误差补偿方面，课题采用几何平均声压代替通常的算术平均声压来计算双传声器法的声场声压值，这样不仅可以有效的减少声强测量中的高频误差，对有限差分误差起到了补偿作用，而且还大大减小了声压谱计算中的计算量。

The main results are as follows:We review the existing Monte Carlo control variates estimators of the price of Asian options and propose a new one. According to pratical needs, we define efficiency as the inverse of the product of the variance of an estimator and its computational time and make it a standard for comparisons to draw the following conclusions: Firstly, the more control variates correlate with arithmetic average Asian options, the larger is the efficiency of an estimator with these control variates, but among which the geometric average option plays the most important role; Secondly, an estimator with more control variates is better than one with less ones only when the time to maturity is long and the volatility is high.

在综合已有研究工作的基础上，本论文的主要创新成果如下：（1）我们回顾了已有的亚洲期权价格的蒙特卡罗控制变量估计，并提出了一个新的控制变量估计，且从客观实际出发，将估计值的方差和计算时间的乘积的倒数定义为效率并以它为标准比较各估计，得到以下结论：与算术平均亚洲期权相关程度越大的控制变量构成的估计的效率越大，而其中起主要作用的控制变量为几何平均亚洲期权的价格；只有在到期时间较长且标的资产的波动率较大时，元素多的多元控制变量估计比元素少的效率大。

Dynamic pressure averaging pipe was generally applied to blowing rate measurement in rectangular pipe of power plant, the average velocity of flow in the section was represented by the average dynamic pressure at the line through the geometric center of the cross section, and then the blowing rate was determined.

针对这一问题，本文设计了基于"对数契比雪夫法"的送风流量测量装置，将5支动压平均管置于同一截面，按"对数契比雪夫法"选点位置开孔，把这5支动压平均管的静压输出孔、总压输出孔分别连接到一起作为传感器组件的差压输出，实验表明这种方法使测量准确度明显提高。

The revised Hargraves formula has the best result compared with Penman-Monteith formula, the average relative error is 6%, moreover, Hargaves method requiring the least data in calculating ETo, so this method has the high actual application value; The following are Radiation method and Blaney-Criddle method ; The worst is the Pan method, even after revised, the highest and average relative error is 36% and 10%, respectively. So, in this study, Penman-Monteith method, Radiation method, Blaney-Criddle method and Hargraves method are used except Pan method.

在这四种方法中，修正后的Hargraves方法与彭曼—蒙特斯方法的计算结果符合最好，其平均相对误差为6％，而Hargraves方法需要的气象数据只有计算时段的最高、最低温度，该方法具有较高的实际应用价值；辐射方法和布兰尼—克里德尔方法次之；蒸发皿方法最差，即使在修正后，E601型蒸发皿的最大误差也高达36％，平均为10％，所以在预报系统的研究设计中采用了除蒸发皿方法之外的四种方法。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失