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With the passage of time, the government performance measurement based on the progressivism, the efficiency's view of Wilson and the efficiency revolution of Taylor was expanded and prevailed, and given different theme and ideas by different ages, appeared with different countenance.

随着时间的推移,奠基于进步主义运动、威尔逊的效率主义和泰勒的效率革命的政府绩效评估运动在美国得以扩展和延续,并且在不同的时代被赋予不同的主题和思想,以不同的面貌出现。

A first reaction to these developments might be that they are favorable, as alongstanding tenet of state and local public finance has been that on efficiency grounds it ispreferable to assess subnational taxes using jurisdictions that encompass greater areas andlarger populations (e.g., state rather than local), as the interjurisdictional mobility of taxbases is significantly lower for such jurisdictions than for smaller entities; as a result,efficiency costs from suboptimal location decisions will be reduced, more progressivity in thetax structure may be introduced if deemed desirable, and economies of scale in revenuecollection may be realized.

第1个反应是,这些事态发展可能是有利地,他们作为一个,长期宗旨,国家和地方公共财政一直认为这是提高效率的理由宜评估使用更大的司法管辖区,包括地区和地方税较大的人群,由于流动性税收interjurisdictional基地,显着高于小实体,如司法管辖区为低;因此,从最理想的位置决定的效率成本将降低,在较累进税务结构,可由假如认为可取的,规模经济的收入收集可能得以实现。

In order to achieve the high efficiency and uniform sensitivity for neutrons with widely different energies, the efficiency of long boron trifluoride proportional counter imbedded in polyethylene moderator was simulated by MCNP code.

为获得较高的探测效率且在较大范围内对中子有比较平坦的能量响应曲线,用蒙特卡罗程序研究了聚乙烯慢化体结构对BF3长正比计数管的中子探测效率的影响。

A first order quasi phase matched periodically poled LiNbO 3 for SHG with 6.5 μm period, 12 mm length, 10 mm width and 0.5 mm thickness has been successfully fabricated by applying an external electric field at room temperature from an high pulsed voltage generator. About 18 mW of CW 0.532 μm green light was obtained pumped by an 1.1 W of CW 1.064 μm Nd∶YAG laser with end coupling, which corresponds to 1.6% power conversion efficiency.

通过高压脉冲电场极化,制备了周期为6.5 μm、长为12 mm、宽为10 mm、厚为0.5 mm的一阶准相位匹配周期性极化铌酸锂;由1.1 W连续1.06 μm Nd:YAG激光器抽运,在5°时产生了约18 mW、0.532 μm的倍频连续绿光,其对应的二次谐波转换效率约为1.6%,二次谐波的归一化转换效率约为1.5% cm-1W-1,相当于79%的周期性极化铌酸锂的理想非线性系数。

Then the spatial index is constructed which includes not only the external approximate expression but also interior approximate expression of spatial object and is extended from tranditional index only with external approximate expression. The index structures of MR-tree and MRD-tree based on multi-approximate expression are set up with the prototype index of R-tree, and the relevant algorithms about the index of insertion, deletion and search are provided. Then, the efficiencies of constructing index based on the multi-approximate expression and window range query are analysised and compared. In addition, the several algorithms and efficiency of soving the maximum enclosed circle and maximum enclosed rectangle are discussed and analyzed during constructing index based on multi-approximate expression.

首先,论文讨论了空间数据的特点、空间数据库的关键技术以及空间对象间的拓扑、距离以及方向关系,分析了空间对象的外部和内部近似表达,然后将传统索引中只利用空间对象的外部近似扩展为既有空间对象的外部近似又有空间对象的内部近似,即以空间对象的多重近似来构建索引,并以R-tree为索引原型构建基于多重近似的MR-tree和MRD-tree索引结构,然后给出了相关索引的插入、删除及查找算法,并通过实验比较分析了基于多重近似索引与基于外部近似索引的构建效率及窗口范围查询效率

These Ir complexes, bearing the chromophore ligand pyridine, isoquinoline and quinazoline respectively, exhibit green-to-red photoluminescence with moderate to high quantum efficiencies in the degassed fluid state and bright emission in solid state.

首先,描述一系列含P^O辅助基的铱金属错合物发光材料之设计概念,这些铱金属错合物藉由pyridine, isoquinoline和quinazoline不同的发光基团调控,磷光放光可以由绿色改变至红色,不论在除氧的溶液态以及固态都有相当不错的量子效率,并且具有效率高、寿命长的优点。

The dependence of couple angle, radian frequency and the mass of the joint on transmission and reflection coefficients are analyzed.

通过数值计算分析了耦合角度和振动频率以及是否计及耦合点质量对传播效率和反射效率的影响。

The results are compared with the model which assumes radiative efficiency to be a constant.

与假定辐射效率为常数的模型对比,结果表明辐射效率的变化对黑洞质量的增长有较明显的影响,使黑洞的增长延迟。

Infrared upconversion and optical storage thin film CaS∶Eu, Sm has been successfully developed by electron beam evaporation and radio frequency magnetron sputtering. Infrared upconversion efficiency of CaS∶Eu, Sm thin films with different thickness has been investigated by using the ultrashort infrared laser pulses with different FWHM.

采用电子束蒸发和磁控溅射技术制备了具有红外上转换和光存储特性的电子俘获材料CaS∶Eu,Sm薄膜,利用不同脉宽的超短红外激光测试了它们的红外上转换效率,指出CaS∶Eu,Sm薄膜的红外上转换发光效率不仅与制备工艺及热退火工艺密切相关,而且存在"耗尽"现象。

Results The corrected yield was about 65% and radiochemical purity was over 99%.The rudimental water in reaction system affect the yield of 18F-FDG.

结果 Explora FDG4合成效率65%,18F-FDG放化纯度99% 18F-FDG其他指标符合药典质量要求,反应体系中残留的水等影响合成效率

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