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By fusing the IKONOS multi-band and pan image using several image fusion algorithms(IHS transform, PC transform, Gram-Schmidt transform and smoothing filter-based intensity modulation) and assessing the fusion image, indicates that qualitative comparison is too subjective, although many methods are provided for assessment when using quantitative methods, more bands and more methods should be used for their limitations, spectral curve comparison was the best method for appraising the result, spectral angle and geometry distance was introduced to appraise the spectral curve.

以IKONOS影像为数据源，对IHS、PC，Gram-Schmidt和基于亮度调节的平滑滤波四种融合算法进行融合处理，对其结果进行了评价。结果表明，定性比较主观性较强，定量比较方法虽多，但大都有一定的局限性，不同谱段的计算结果总有些差异。因此，定量评价时应该多选一些波段与评价方法才能获得比较客观的评价结果。光谱曲线的比较不失为一种比较好的方法，在对光谱曲线进行比较时本文引入了光谱角度和几何距离两种方法进行定量的比较。

Using these vectors, clusters of vectors are derived using a derived spectral distance measure.

使用这些矢量，用一个导出的频谱距离可推导出矢量簇。

They were further seprated ,using RP-HPLC and components e and 2 had the highest ACE inhibitory activity. The relative molecular weight of e and 2 was identified as 590Da and 649Da by using HPLC-Mass Spectrography .

用高效液相-液质联用分析组分e组分2，得到它们的相对分子质量分别是590Da和649Da，氨基酸组成和序列分别是Trp-Ala-Ala-Gly-Trp、Arg-Gly-Ala-Ala-Gly-Ala-Phe。

Then the propagation of an arbitrary nonideal optical beam is analyzed. In terms of the moment theorem, the performance of modes of BOR is analyzed from both points of view of geometry optics and diffractive optics. Comparing BOR with the resonators using plane mirror and spherical mirror or using plane mirror and aspherical mirror by finite element method, the design procedure for BOR is gave.

然后以衍射的角谱理论为基础，用矩量定理讨论了任意光束的传播规律，从几何光学和衍射光学的角度完整地分析了二元光学谐振腔的模式特征，用有限元方法数值对二元光学谐振腔、非球面腔和球面腔进行衍射分析，比较了三种腔型的差异，给出了二元光学谐振腔的设计方法。

During these years (1997-2000) in the research area of annonaceous acetogenins 5 natural products and a number of chiral-pure analogs of annonaceous acetogenins have been synthesized using sugars as the starting materials. Their high activity and selectivity against cell line of colon tumor and a relationship between activity and configuration have been found too. In the respect of inhibitor of sialidase two new methodologies for the synthesis of chiral-pure 3-deoxy-ulosonic acid using hetero-Diels-Alder reaction or asymmetric propargylation as the key reaction were developed. On the topic of anti-leukemia marine natural product clavulactone a synthetic method based on the free radical cyclization and starting from sugar has been developed. In other title of PKC inhibited agent sphingosine a new synthetic route with SN2' as the key reaction has also been disclosed.

项目期间（1997-2000）在番荔枝内酯方面从糖出发合成了五个天然产物和一批手性纯的类似物，它们对肠癌细胞有很高的活性和选择性，并与构型有关；在唾液酸酶抑制剂方面发展了二类全新手性纯高碳糖的合成方法－杂原子D－A反应或丙炔基不对称加成为关键的反应；抗白血病海洋天然产物群柱虫内酯方面研究了由糖出发和自由基环化反应的合成方法；对PKC 起抑制作用的鞘氨醇方面也开创了新的合成途径－由糖出发并以SN2'反应为关键反应。

According to the central limit theorem,the writer analyses the using case of air splicer,and clarifies the using distribution of air splicer,obtains the statistic on air consumption of air splicer.

运用中心极限定理对空气捻接器的使用情况进行分析，明确了空气捻接器的使用分布情况，得出了空气捻接器耗气量的统计数据。

Unfortunately, using one hand to hold a large pot while using the spray nozzle with the other is a feat in and of itself.

不幸的是，一只手拿着大盆子，另一只手掌握喷水管，本身就是一件高难度的技艺。

The heat transfer model of the spur gear used in the high speed train is established, and solved by using the finite differential method. The influence of the immersion depth on the equilibrium temperature is analyzed by using this model.

并建立齿轮箱的传热模型，采用有限差分法，在模型验证有效的基础上，计算分析了不同浸油深度对齿轮箱平衡温度场的影响。

Then three integrated systems of sludge pump feeding and desulphurization are offered, and cost-effectiveness analysis has been made. Finally an optimized system of two-stage pump method which using piston pump to transport sludge and using squeezer pump tofeed is adopted.

在此基础上提出三个洗煤泥泵送给料和脱硫一体化的系统设计方案，并进行了技术经济比较，确定洗煤泥用注塞泵输送，用挤压泵给料的两级泵送方式为最优方案。

Second, setting up of stakeout and information management system, in order to control the situation of exploitation and using of water resources and ensure the water-using quantity control system working.

二是水资源实时监控与信息管理系统的开发，以便于科学、准确、及时把握水资源及其开发利用动态，保证总量控制管理系统的运转，并实现信息化管理。

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。