查询词典 Bi

Materials and Methods:236 pathology-confirmed breast lesions(155 malignanty,81 benignancy) and 221 disease-free contralateral breast tissues were examined using EPI-DWIb values=0,1000 s/mm~2TR/TE=8400ms/93.8ms; FOV=30×30cm;matrix=128×128;ASSET=2,slice thickness=4mm.DCE-MR imaging was also performed for accurate location of the lesion using VIBRANT sequence.The mean ADC values of malignant and benign lesions and the disease-flee contralateral breast tissues were calculated from the ADC map for each patient.One-way analysis of variance was applied to compare the mean ADCs of malignant lesions with benign lesions and disease-flee contralateral breast tissues.The threshold ADC value for malignant lesion was determined using a receiver operating characteristic(ROC curve analysis.Each lesion was classified into two major types:mass and non-mass lesion.The diagnostic performance of DWI was compared in breast mass and non-mass lesions.Results:155 malignant and 81 benign lesions were confirmed in 236 lesions.

材料与方法：搜集术前行乳腺MR检查并经穿刺或手术病理证实的236例乳腺病变，以对侧正常乳腺腺体作为正常对照，采用横轴位的平面回波-扩散加权成像序列，TR=8400ms，TE=93.8ms，层厚=4mm，激励次数=2：视野=30×30cm，矩阵=128×128，ASSET=2，b值=0和1000s/mm~2；参考动态增强图像准确定位，测量病变区和对侧正常乳腺腺体的ADC值，应用t检验比较良、恶性病变及正常腺体ADC值的差异，采用接收者工作特征曲线(receiver operating characteristic curve，ROC)确定良恶性病变的ADC界值；根据BI-RADS MRI将乳腺病变按照形态学表现分为肿块性病变和非肿块性病变两组，比较ADC值在肿块和非肿块性病变中定性诊断的效能。

Bi-/multi-static Synthetic Aperture Radar has become one of the hotspots in recent years.

近年来，双／多基地合成孔径雷达已经成为SAR研究领域中的热点之一。

And the security of Mrtds with bi- ometric information is an extremely important problem.

而含有生物特征信息的机器可读旅行文档的安全是一个极为重要的问题。

The studies show that the bi- frequency ultrasound is an effective method for pollutants degradation, but it need to make further study.

实验表明，频率组合对有机污染物的降解是一条有效途径，但需要更进一步的研究。

A new bi -directional DC/DC converter is presented.

提出了一种新颖的双向DC/DC 变换器。

Based on these, the bi - level optimal model and the optimization framework are summarized.

对开行方案双层优化模型和优化框架进行概述。

Any bi- conditional device, such as a memory core, is able to store a single bit.

任何的双重条件的装置，例如磁心贮记，都可以存贮一数元。

On the other hand, the Chinese enterprises, which were well influenced by the traditional culture, have kept on emphasizing on the bi- or multi-lateral relationships of organizations for a long time.

而在传统文化的影响下，中国企业一向强调企业运作中组织间的双边和多边关系，在这样的环境中引入关系营销的理念应该能够取得极大的成功。

Based on status in quo of the interface crack propagation of the isotropic bi - material, the exiting problems and the tendency of the research are proposed.

在对各向同性双材料界面裂纹扩展研究现状进行综述的基础上，提出了目前研究存在的问题以及今后的研究趋势。

On the basis of that, the possible applications and the further development tendency are discussed. It is instructive and meaningful to the investigations of bi-/multi-static SAR for the future.

在此基础上探讨并指出了该技术的应用前景及其未来发展趋势，对开展双／多基地合成孔径雷达研究具有一定的指导意义。

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。