有效面积

With strict control of indications , the partial coverage porcelain veneer could function satisfactorily as an alternative restoration for small incisal defect of an terior upper teeth .

结论在严格选择适应证的前提下，部分覆盖瓷贴面可以作为上切牙小面积切角缺损的有效治疗方法。

local intramyocardial administration of 17β-estradiol loaded nanoparticles can effectively promote angiogenesis and decrease infarct size after MI in rats,and do not increase mortality.

心肌内局部注射17β-雌二醇纳米粒可有效促进大鼠梗死后心肌毛细血管生成，减少心梗面积，不增加死亡率，对心梗有较好的修复作用。

In conclusion, the load of ischial tuberosities could be effectively mitigated in sitting position when the adjustable soothing chair was used; the adjustable mechanism could make the shape of the back-support match more with the curvature of lumbar spine, so that the touching face of waist toward the chair was increased and then the load of back muscle was decreased.

因此使用可调式抒压座椅时，能在坐姿时有效地减少坐骨粗隆所承受的负荷，其中可调式调整机构能使背垫的形状更符贴於腰椎的曲线以增加腰部接触面积进而减少背部肌肉的负担，并且尽量维持腰椎前凸的曲线，减少造成下背痛的发生率。

A number of modern, large-scale water conservancy projects represented by Kizil Reservoir and the Ulug Ata key water control project in Hotan and large numbers of trunk and branch canals, as well as seepage control projects have been built, thus rapidly increasing the amount of water diverted, the capacity of the reservoirs and the well-irrigated area in the whole region.

以克孜尔水库、和田乌鲁瓦提水利枢纽等为代表的一批现代大型水利工程和大批干支渠及其防渗工程的建成，使全区的引水量、水库库容和有效灌溉面积迅速增加。

Given its "irrigation farming in oases,"Xinjiang has built a number of large modern water conservancy projects, such as the Kizil Reservoir in Aksu and the Ulug Ata Reservoir in Hotan, in addition to canals, ditches and seepage control projects, which have greatly increased the amount of water diverted, reservoir storage capacity and effectively irrigated areas.

新疆根据&绿洲生态、灌溉农业&的特点，建成了以阿克苏克孜尔水库、和田乌鲁瓦提水利枢纽等为代表的一批现代大型水利工程和大批干支渠及其防渗工程，全区的引水量、水库库容和有效灌溉面积迅速增加。

Beijing environmental problems hold severe, and atmospheric and water pollute, soil and water loss, hot island and yawp are leading problems,and take on territorial characteristic. Based on research on relativity between urban forest and these environmental problems, urban forest can effective improve environmental quality in Beijing. And for the aim of improve environmental quality, Beijing forest overlay should attain 35% at least in citywide range, and local-areas being severe environmental problem should be provided with higher forest overlay.5. Through the study on urban forest needed capacity, Beijing's forest coverage is up to par in citywide range, but montanic forest coverage, plain covered with trees and average forest area are lacking, and CO2 and O2 balance is incapable;form the point of heat and balance CO2 and O2 balance,urban forest the city zone and suburb is lack. There is urban forest developmental potential space,but the city zone and suburb area need be compensated form urban forest in circumjacent region.6. On the based of the above results and ecological network system, the author drived whole region into city area, plain and mountain area are needed at the point of planning thoughts of running-through forests and water .

根据城市森林与北京市主要环境问题的相关性分析，城市森林在改善这些环境问题中具有重要的作用，为有效改善这些环境问题，整个北京市域范围内森林覆盖率至少达到35%，并且分布比较均匀，环境问题严重的局部区域需要不同程度增加森林覆盖率。5、通过对北京市城市森林需求量研究发现，虽然在市域范围内北京森林覆盖率达到了国家标准，但是山区森林覆盖率、平原林木覆盖率、城区人均森林面积不足；从区域热平衡和碳氧平衡角度分析，城区和郊区不能满足本区域的城市森林需求量，虽然北京市城市森林具有一定的发展潜力，整体上基本可以满足城市需要，但是这些区域需要依靠周边区域城市森林的补偿。6、根据以上的研究结果，以中国森林生态网络体系建设的点、线、面布局理念为指导，以&林网化——水网化&作为优化理念，将北京市整个市域划分为城区近郊区及其辐射区域，平原区和山区三大区域，依据三大区域特点进行城市森林布局优化。

However, currently, the retrieval of multiangular remote sensing seldom considers the use of spectral information. We use MSAVI2 as an index to get the a priori knowledge of LAI. As a result, the a priori knowledge is more objective. From the comparison of using or not using this MSAVI predicted a priori knowledge, we found that this approach is effective.

与以往的反演方法相区别，该文利用行播作物二向反射模型，将多角度与多光谱数据结合进行行播作物LAI反演实验，并对反演算法进行了详细的敏感性分析实验，结果表明采用多角度、多光谱遥感数据相结合的方法可以有效反演行播作物的叶面积指数。

Based on the nonequilibrium model, the determination of packing section division for packed column is investigated.

基于阶跃摄动测试，对非平衡模型主要参数进行了灵敏度分析，结果表明模型中的有效相接触面积的灵敏度最大。

The purpose of this experimental program is to investigate the behavior of slab-column connection with nonrectangular columns and the differences between it and conventional connection.

因此，本文首先进行了柱截面形状为三种典型异形柱（十字形柱、T形柱和L形柱）的板柱冲切试验研究，并将其受冲切特性与相应的等面积方柱和等有效周长方柱试件进行了对比。

Intercropping ; Winter wheat ; Maize ; Photosynthetically active radiation ; Leaf area index

间作；冬小麦；春玉米；光合有效辐射；叶面积指数

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。