分数

Many new detection techniques are proposed, that include: To overcome the faults of cross-terms and short unambiguity range for the common Wigner-Ville Distribution , short-time Fourier transform and Gabor transform are applied to SAR moving target detection. To improve the detection performance of WVD in noise environment, a new technique based on the Cross-WVD is proposed. The application of fractional Fourier transform to chirp signal detection is analyzed and extended to SAR moving target detection. To eliminate the restriction of chirp-Fourier transform, a new modified definition is proposed and applied to SAR moving target detection. To detect multiple moving targets whose scattering intensities are different heavily, the CLEAN technique is combined with the above techniques and the ideal detection performance is achieved. At last, the whole dissertation is concluded.

具体的研究成果如下：针对常用的Wigner-Ville分布在多目标情况下存在交叉项，并且多普勒不模糊范围小的缺点，提出将短时Fourier变换和Gabor变换应用于SAR运动目标检测，分析了其优势所在；为进一步提高Wigner-Ville分布低信噪比条件下的信号检测能力，提出基于互Wigner-Ville分布的运动目标检测方法；分析了分数阶Fourier变换在线性调频信号检测中的应用，提出基于分数阶Fourier变换的运动目标检测算法；对离散Chirp-Fourier变换的定义进行了修正，提出修正的离散Chirp-Fourier变换，克服了限制其应用的约束条件，并用于SAR运动目标检测当中；强度相差较大的多运动目标检测历来是机载SAR技术的一个重点和难点，我们将CLEAN思想融入上述多种算法当中，良好地解决了该问题。

Hypoxic-ischemic encephalopathy experimental grouping: Sixteen successful C57/BL6J mice models, aged 7 days, were randomized into 2 groups: experimental group (n =8), following ligation of right common carotid artery, mice were placed in the closed container containing 0.08 volume fraction of oxygen and 0.92 volume fraction of Nitrogen gas, and taken out 1.5 hours later; 3 μL ESCs were injected into the right cerebral ventricle at about 1 week, and control group (n =8), in which, the same amount of PBS was injected into the right cerebral ventricle.③ At 12 weeks after transplantation, the survival and migration of induced ESCs labeled by Lac-Z in the spinal cord and brain were observed by zymologic method.

缺氧缺血性脑病实验分组：将造模成功的鼠龄7 d的C57/BL6J16只小鼠随机分为2组：实验组8只，结扎右侧颈总动脉后将小鼠置入含体积分数0.08氧气和体积分数0.92氮气的密闭容器内，1.5 h后取出；1周后在右侧脑室内注入3 μL诱导胚胎干细胞。

It is shown that the optimal experimental conditions are neutralisation level 90%, emulsifying agent usage level 3%; initiator concentration (NH4)2S2O8 0.06%, NaHSO3 0.04%, DMAEMA 0.02%; monomer concentration, 40%, respectively.

结果表明，最佳的实验条件：中和度为90%；乳化剂用量为3%；引发剂占单体的质量分数分别为(NH4)2S2O8 0.06%、DMAEMA 0.04%、NaHSO3 0.02%；单体在水相的质量分数为40%。

Last year, the average standardised test score of this group was in the top 7% in the country.

去年，这一群体的平均标准测试分数占整个国家最高分数的7%。

To over reach the mark is just as bad as not reaching it.

超过分数跟没有达到分数一样糟糕。

TA different mole fraction of the mass fraction of polymer in water were low.

不同TA摩尔分数的聚合物的质量分数均较其在纯水中低。

In learning fractions, an integration of two concepts can be reasoned smoothly by analogy, i.e., size of unit × number of unit are analogized to denominator and numerator to integrate into a size.

在分数的学习上能顺利类推两个概念的整合。即把单位量×单位数类推至分数中分母与分子两概念整合代表一个量。

Activity of alkaline phosphatase and ability of formation for calcifying nodules were determined.

抽取健康成人骨髓组织，用Percoll分离液分离出骨髓中的单个核细胞，在含体积分数为10%小牛血清的高糖DMEM培养液中，置于37℃、含体积分数为5%的CO2湿化空气孵箱中培养，通过传代培养扩增骨髓基质干细胞，传三代时改用含地塞米松、β-甘油磷酸和维生素C的条件培养基培养，用倒置显微镜、HE染色观察增殖和分化情况，并测定碱性磷酸酶活性和钙结节形成能力。

The results showed that the in-ternals tended to have higher depression and shame scores than the externals,and this relation was sig-nificantly intermediated by gender.

对各量表分数的相关及方差分析表明，心理控制源分数与抑郁和羞耻有中等水平的正相关，与自尊有较低的负相关，并且性别有显著的中介作用。

Since the scores represent the most precise information they need, they can make accurate decisions based on these scores much faster.

由于分数所代表的最精确的他们所需要的信息，他们可以作出正确的决定，根据这些分数快得多。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。