查询词典 attenuation

The attenuation values at unenhanced and enhanced CT of the tumor were also recorded. Results The 32 cases adrenal neoplasms included 9 cases with aldosterone-producing adenoma, 5 hydrocortisone-producing adenomas, 1non-functional adenoma, 5 cortical hyperplasies,4 pheochromocytomas,2 adenocarcinomas, 3 metastases, 1 fibroneuroma, 1 ganglioneuroma and 1 myelolipomas. Conclusion The characteristics on CT images are associated with the pathological feature in adrenal neoplasms.

结果 醛固酮腺瘤9例，体积较小且密度低，增强后轻度增强；皮质醇腺瘤5例，瘤体较大，边界清，密度略低于正常肾上腺组织；无功腺瘤1例；结节增生5例，为等或稍低密度影，增强后强化较明显；嗜铬细胞瘤4例，体积较大，密度不均，可见多个囊变坏死区；皮质腺癌2例，肿块形态不规则，边缘模糊，密度不均匀，易发生大片坏死及点状钙化；转移瘤3例；神经纤维瘤、神经节瘤及髓性脂肪瘤各1例。

Lung metastases from hypervascular tumors can manifest with a halo of ground-glass attenuation that most likely results from perilesional hemorrhage secondary to the fragility of neovascular tissue.

富血管肿瘤的肺转移瘤可以表现为磨玻璃样晕，最有可能是继发于易碎的肿瘤血管组织的病灶周围出血。

The main symptom of hypophrenia and mental retardation consisting in every age phase and many diseases is attenuation of learning and memory function .

智能减退或障碍症主要表现为学习记忆能力的减退，存在于各个年龄阶段与多种疾病，带来了严重的社会问题和经济负担，其防治已引起广泛重视。

For choosing a material to interfere with IR and laser,the IR and 10.6μm laser transmissivity of micron-copper powders of different components were tested in the smoke chamber,when the concentration of the smoke reached 1.0 g·m-3,the transmissivity of 1~3μm,3~5μm and 8~14μm IR under 30%,and the transmissivity of 10.6μm laser under 20%,the attenuation ability of red copper powders,green and red copper powders and green copper powders to IR and 10.6μm laser increased gradually.At the same time,the interferent...

为选择一种能够遮蔽红外与激光的烟幕干扰材料，在烟幕箱中测试了组分配比不同的微米铜粉的红外与10.6μm激光烟幕透过率，当烟幕浓度为1.0 g.m-3时，1~3μm，3~5μm，8~14μm红外的透过率均小于30%，10.6μm激光的透过率小于20%，红光铜粉、青红光铜粉和青光铜粉对红外与10.6μm激光的衰减能力逐渐增强；同时测试了微米铜粉对红外热像仪的干扰效果，浓度为2.0 g.m-3时，青光铜粉能够完全遮蔽红外热像仪。

Using the two-station methods, the fundamental-mode interstation attenuation coefficients γ was calculated.

利用单源双台法计算出台站之间的Rayleigh面波混合路径衰减系数γ。

We selected 223 pairs of Rayleigh wave from 2681 waveforms recorded by 58 tations in the EuroAsia land and west pacific region. The fundamentalmode surface wave was separated using the phasematch for each seismograms. The fundamentalmode interstation attenuation coefficients γ was calculated using the twostation methods.

根据欧亚大陆及西太平洋地区58个数字地震台站2861个长周期波形记录，从中挑选出符合条件的223对经过中国大陆的双台路径记录，采用相匹配滤波和频率域维纳滤波相结合的方法，计算出双台之间的混合路径衰减系数。

The analysis of the experimental curves shows that ,the larger the size of the madia,the lower is its gamma -field and the higher its attenuation ratio;with the increasing temperatureof the media, the absorbent of gamma - ray and the attentuation ratio increase.

经试验的数据曲线分析表明，介质粒度越大，其γ场降低，衰减率高；而介质的湿度越大，介质对射线的吸收量增高，衰减率增高。

Homogeneous attenuation with a central,marginated stellate area was the characteristic feature of renal oncocytoma on CT scan.

该肿瘤CT扫描密度均匀一致，瘤体中央有星状结构为其特征。

Secondly, the sufficient condition for the existence of memoryless state feedback controller with definite attenuation and the method of designing controller are derived. The condition is also further equivalent to the solvability of certain linear matrix inequality.

其次得到了具有指定衰减度的无记忆状态反馈控制律存在的充分条件及相应的控制器设计方法，该条件被进一步等价地转化为一个线性矩阵不等式的可解性问题。

Additional signs including the striped and gridding trace around the abscess（n=5）, conglutinated to the body of uterus(n=12), thickening of the mesosalpinx (n=8), rectosigmoid bowel thickening(n=5), increased attenuation of edematous perirectal fat(n=8), thickening of the uterosacral ligaments(n=10), hydroureter(n=3), and so on.

继发征象包括脓肿周围条索及网格状影5例，与子宫体粘连分界不清12例，输卵管系膜增厚8例；直肠乙状结肠壁增厚5例；直肠周围脂肪水肿模糊8例；子宫骶骨韧带增厚10例；输尿管扩张3例等。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。