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In this algorithm, the direction-of-arrival is assumed to be a discrete random variable with a priori probability density function defined on a set of candidate points. Whether or not the secondary sample is required is based on the a posteriori probability distribution of a set of candidate point"s, which can be calculated from the array received signals. And then, the resulting beamformer is a weighted sum of the beamformers pointed at the latest set of point"s, which are combined according to the value of the a posteriori probability for each pointing direction.

在该算法中,期望信号的波达方向被看作是一个定义在若干候选波达方向上的离散随机变量,由阵列接收信号计算出各候选波达方向的后验概率,并将后验概率的分布作为是否需要进行二次采样的判断标准;随后,对各波达方向上的波束成形权值线性加权,便可得到自适应波束成形器,权系数为各候选波达方向的后验概率值。

According to certain tie in 2 values image the condition finds candidate face and demarcate, search the area of " empty " in 2 values image next, if position of " empty " shows acute angle triangle to distributing fitly, and be located in inside candidate face area, prove this awaits electorate region to be person face area namely.

在二值图像中依据一定的约束条件找到候选人脸并标定,然后搜寻二值图像中的"空洞"区域,假如"空洞"位置恰好呈倒锐角三角形分布,且位于候选人脸区域内,则证实此候选区域即为人脸区域。

The discrete ordinates model was used for modeling the radiative heat transfer, and the effect of slag particles on radiative heat transfer was included.

结果表明:炉体入口存在张角约为10°的中心射流区,其流速和温度均较高,且周围存在明显回流区,回流区内部分颗粒富集;大部分颗粒直接落入渣池,且粒径越大落入渣池时温度越高;炉内温度分布除中心射流区,整体分布均匀,且随壁面灰渣厚度的增加而升高;计算结果与实验测量结果及文献值基本一致。

Results Of the observed 56 parameters of rats and mice 80.4%indicated that the threshold doses for prenatal HTO exposure ranged from 0.030 Gy to 0.092 Gy,and the other 19.6%showed the threshold doses from 0.093 to 0.300 Gy.

结果 以大鼠和小鼠为实验对象,观察的56项生物学指标中,氚的致畸阈值:80.4%的指标分布在0.030-0.092 Gy范围内,有少数指标(19.6%)分布在0.093-0.300 Gy范围内。

Treatments were as follows: fertilization during leaf-expansion period, fertilization during green-leaf period, and no fertilizer. Results showed that individual leaf area, thousand-leaf weight, and leaf distribution were relatively stable with little influence from fertilization. Fertilization during leaf-expansion compared to the green leaf period significantly increased leaf number, leaf weight per plant, and leaf area index. Fertilization during led-expansion also significantly increased the total weight of leaves corresponding to each branch. The 14th to the 17th branches had the largest number of leaves in the canopy with fertilization increasing the weight of each branch but not changing the center of the canopy.

结果表明:毛竹单叶面积、千叶质量和叶片分布受施肥的影响较小,是较为稳定的指标;展叶期施肥处理(处理1)能显著增加单株立竹的叶片数量,到7月底,其单株立竹叶片总质量和叶面积指数分别比绿叶期施肥(处理2)提高14.8%和13.7%,比不施肥提高27.6%和24.5%;冠层14~17档是单枝叶片数量最多的区域,施肥能增加各枝盘叶片的质量,但对林冠重心的分布无影响;单叶叶面积稳定后(6月),处理1的叶绿素测定值和光合速率显著高于处理2和对照,而处理2与对照间无显著差异。

ND-1 scFv was labeled with 〓Tc by MTD.〓Tc-ND-1 scFv was injected into mice bearing the CCL-187 xenograft for biodistribution study, radioactivity in blood, tumor and normal tissue was determinated at various time periods following injection by a gamma scintillation counter, and the ratios of radioactivity between tumor tissue and normal tissue were evaluated. Radioactively- labled scFv displayed rapid localization in tumors. Accumulation was found in tumors in high concentrations 1 hour after injection, and scfv uptake in tumor was 2.6 times higher than in blood. The T/NT for blood, liver, spleen , hear, lung and kidney were 2.61, 1.85 1.94, 1.75, 0.83 and 0.22 respectively.

将ND-1scFv与同位素〓Tc偶联制备〓Tc-ND-1scFv,注入荷瘤裸鼠体内,观察了偶联物的体内生物学分布,结果显示,〓Tc-ND-1scFv在荷瘤裸鼠体内的生物学分布带有明显的肿瘤积聚趋向,注射1小时后即可选择性地积聚于肿瘤组织,其放射性明显高于大多数正常组织,除肾脏和肺外T/NT值均大于1.2,而完整的ND-1完成同样的积聚则需要20-24小时。

The results show that values of 1n computed with the D8 algorithm are more discrete and have rougher pattern than those computed with the MFD algorithm, and the mean values of 1n with D8 algorithm are slightly higher than those with the MFD algorithm.

结果表明:与多流向法相比,D8方法的计算值较为离散,分布曲线较粗糙,平均值略高,方差和偏态系数也较大;但是,两种方法计算的1n的分布曲线大致相似。

The results show that values of ln computed with the D8 algorithm are more discrete and have rougher pattern than those computed with the MFD algorithm, and the mean values of ln with D8 algorithm are slightly higher than those with the MFD algorithm.

结果表明:与多流向法相比,D8方法的计算值较为离散,分布曲线较粗糙,平均值略高,方差和偏态系数也较大;但是,两种方法计算的ln 的分布曲线大致相似。

New observables which can be used to estimate the fraction of the anisotropicemission particles to all the final state particles and the degree of concentrationaround the flow direction are proposed to characterize the flow.

末态粒子的极角分布宽度是描述流效果的一个重要参量,只有综合考虑流角,流值和极角分布这三种因素,才能正确反映集合侧向流的整体特征。

The following main results are obtained: The TiO_2 photocatalyst with small crystallite size, high surface area, narrow and uniform pore size distribution, and microporous frameworks could be prepared out by applying MW radiation in the preparation process. The microwave-induced fluorescence technique verified for the first time that microwave enhanced the formation rate of hydroxyl radical, leading to the increase in the photocatalytic efficiency. Compared with the conventional catalyst, TiO_2 prepared by MW dielectric heating owns a higher UV absorption ability, and its optical absorption edge and photovoltaic response are shifted toward the short wavelength region, resulting in increase of photooxidation efficiency. The photocatalytic conversion and the mineralization ratio of acetaldehyde are increased respectively by 30% and 40% over the TiO2 prepared by MW radiation when compared to the TiO2 prepared by the conventional heating. For the MW-assisted photocatalytic reaction over the MW-prepared TiO2, production of hydroxyl radicals is enhanced by 22.5%, and the photocatalytic conversion is accordingly increased by 20%. Similarlly, applying MW also increased the photocatalytic conversion and the mineralization ratio of acetaldehyde over TiO2/Al2O3 sample.

论文得到如下主要结果和结论:(1)微波介电加热TiO_2 溶胶可得到晶粒度小、光催化活性高、比表面积大和孔径分布窄而均一,且微孔发达的TiO_2光催化剂;在溶胶干燥处理过程中微波可使催化剂表面缺陷增加,进而导致光催化反应过程有更多的活性羟基自由基产生;(2)微波制备能显著增强TiO_2 样品的紫外光吸收率,并使其光吸收和光伏响应阈值发生蓝移,从而提高TiO_2的氧化还原能力;(3)与常规加热法所制TiO_2比较,微波法制备的TiO_2对乙醛的光催化降解转化率提高30%,CO_2生成率提高40%以上;(4)与未加微波辐射时相比,发现在光催化反应过程中施加微波,TiO_2 的羟基自由基生成速率提高了22.5%,相应CH_3CHO 光催化降解转化率提高了20%;对Al_2O_3/TiO_2催化剂,CH_3CHO 光催化降解转化率甚至提高了33%,同时CO_2 的生成率也都大幅度提高;(5)微波辐射可改变光催化降解乙醛的产物分布,推断施加微波时乙醛光催化降解按照羟基自由基引发的链式反应机理进行,微波&非热效应&起主要作用。

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