效率

A model based on data envelopment analysis is used to evaluate the systems' efficiency.

本文通过对现代企业物流系统的特征进行分析，从而确定企业物流系统有效性综合评价指标体系，建立评价企业物流有效性的数据包络分析模型，该模型测算了各系统的总体效率、技术效率、规模效率及其规模效益状况。

Results After twelve weeks observation, the observed group's drug efficacy to the symptom of abdomen fullness, epigatric pain, eruct, or epigastric burning was 87%, 87%, 77%, 79%, respectively, while the matched tepronone group's efficacy was 62%, 54%, 46%, 50%, the matched weifuchun group's was 63%,53%,50%, 50% respectively.

上腹烧灼感总有效率联合治疗组为79%，替普瑞酮组为50%(P.05)。联合治疗组组织病理学改善好转率为50%，显效率为43%，总有效率为93%；替普瑞酮组好转率为37%，显效率为33%，总有效率为70%(P.01)；胃复春组好转率为33%，显效率为35%，总有效率为68%(P.01)。

Aimed at the low screening efficiency of Aiyou Coal Preparation Plant,some technical reforms were done,namely,proper coal feed rate,fitting position of feed trough and regular analysis of screening efficiency ,and the screening efficiency was obviously increased.

针对艾友矿选煤厂筛分效率低的问题，采取制定合理给煤量、合理布置筛网、合理布置给料溜槽和定期取样分析筛分效率等技术措施，使筛分效率得到明显提高。

When the LD incident power was 2.68 W, 2.7 mW and 24 mW free-running laser outputs at 731 nm have been obtained in the same plano-concave cavity, respectively. By using of 3.4 mm length laser rod, the overall efficiency of 1.4% and slope efficiency of 11.9% were gotten.

当激光二极管输入功率为2.68 W时，在平凹腔中祖母绿晶体分别实现了2.7 mW和24 mW的731 nm红外激光的自由输出，其中长度3.4 mm激光晶体的光-光转换效率为1.4%，斜率效率为11.9%，激光阈值在0.7 W附近，并分析讨论了效率低的原因。

This paper main research results were shown as follows:(1) We put forward Chinese Ports technical efficiency, cost efficiency and X efficiency measurement systems considering the influencing factors such as freightage quantity.

论文的主要研究成果如下：(1)构建了考虑货运量等影响的中国港口技术效率、成本效率和X—效率测度体系。

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。

The results indicated that the highest NAIs concentration was distributed 5 cm far in front of the mask, and the NAIs concentration was decayed with the distance to the ionizer. The NAIs concentration also decayed on the mask surface due to electric neutralization.

首先探讨空气负离子在呼吸范围中的分布状况以及对四种生物气胶的控制效率分布，进而比较四种生物气胶控制效率的差异，最后探讨空气负离子稳定度对生物气胶控制效率的影响。

Illustrations are used to analyze the limitation of line sampling firstly. For linear limit state, the efficiency of LS is affected by the dispersion of the actual important direction from the optimal one, the bigger the dispersion is, the lower the efficiency is. For non-linear limit state, in case that the actual important direction deviates from the optimal one greatly, the efficiency and the precision of LS decrease seriously, even wrong results are obtained.

首先通过算例分析线抽样方法存在的问题，对于线性问题，线抽样法的效率受抽样重要方向与最优重要方向偏离程度的影响，这种偏离程度越大，效率越低；而对于非线性问题，当抽样重要方向与最优重要方向偏离较大时，线抽样的效率和精度均严重下降，甚至得出错误的计算结果。

After giving its upper bound and lower bound, its relation with generalized coefficient is discussed at last.

本文提出了一种新的相对效率，并给出了该相对效率的上下界，讨论了该相对效率与广义相关系数的关系。

This invention provides an on-line analysis method and system for combined gas and steam cycle power station's efficiency, which comprises an on-site data-collecting unit, used to check the sub-devices state parameter in power station; a data base server linked to on-site data-collecting unit to stored the state parameter provided by data-collecting unit; modular arithmetic server used to calculate the gross operation efficiency of power station based on the data base state parameter and the influence degree caused by sub-devices property to the gross operation efficiency; client device to receive command input by clients and output the calculating result by modular arithmetic server.

本发明提供一种燃气―蒸汽联合循环发电站运行效率的在线解析方法和系统，在线解析系统包括：现场数据采集单元，用于测量电站各分设备的状态参数；与现场数据采集单元相连的数据库服务器，用于存储现场数据采集单元测量得到的状态参数；模型运算服务器，其根据从数据库提取的状态参数并计算电站的总运行效率和当前状态下电站各分设备性能对电站总运行效率的影响程度；客户机，其接收用户输入的命令并输出模型运算服务器的计算结果；网络，其将数据库、模型运算服务器和客户机连接在一起。

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。