查询词典 threshold exposure

All were determined by the acoustic immitance audiometer and pure tone audiometry. Results （1）A type was determined in 33 patients (62.26%), As type in 4 patients (7.55%), B type in 2 patients (3.77%), and C type in 14 patients (26.42%). 35 patients (66.04%) had normal air hearing threshold, 16(30.19%) had a little deafness and 2 (3.77%) had middle deafness.

结果 (1)53例患者中，声阻抗鼓室导抗图A型33例（62.26%），As型4例（7.55%），B型2例（3.77%），C型14例（26.42%）；正常听阈35例（66.04%），轻度聋16例（30.19%），中度聋2例（3.77%）；(2)As、B、C型异常导抗图、峰压值、同侧对侧镫骨肌反射、坡度在鼻窦炎各分型与对照组、各分型之间比较，30组比较中9组有统计学差异。

Methods Pure-tone audiometry and statistical analysis of the hearing threshold of the speech frequency and high frequency were performed in 60～70 years old elders.

方法对 6 0～ 70岁有军事噪声暴露史的老年人 79例(15 8耳)及无军事噪声暴露史的老年人 36 4例(72 8耳)进行纯音测听，将言语听阈和高频听阈进行统计分析。

The objective of this study was to evaluate hearing threshold shifts and DNA damage using Pure-tone audiometry and comet assay in paper recycling workers who had been chronically exposed to noise in the workplace.

过去的研究已显示废纸回收造纸厂的噪音作业环境会引起不同程度的听力损失，但并没有相关的研究显示是否会引起DNA损伤。

A new pseudocolor coding, automatic threshold method, is presented.

利用自动阈值法可以在室温环境下，对目标的温度及其分布进行测量。

Stepping across the threshold of your heart is the greatest home coming of life – the Baptismal return to the heart of God.

门槛你的心是最大的未来家居生活的受洗回到心脏的上帝。

MethodsThe pharmacological effects of the Ziziphus jujube leaf extract on the autonomic activities of mice, the time of sleep induced by pentobarbital sodium, the sleeping synergistic action of mice with barbital sodium at sub-threshold and hypnotic dosages and the central inhibitory effects in mice induced by amphetamine were investigated.

方法考察酸枣叶提取物对小鼠自主活动的影响、对延长戊巴比妥钠诱导的小鼠睡眠时间、对阈下巴比妥钠的睡眠协同作用以及对苯丙胺中枢兴奋作用的影响。

Firstly, according to this character, primacy central point is detected by the exploring extremum method in the windows of 3×3 pixels. Then, basing on this central point, approximate normal line at ±45°、0°and 90°angle are drew.if the minimums of normal line is at central point and the difference between the minimums and the maximum in the normal line is more than the threshold, this point is considered to the edge point of image.

首先，在3×3象素的窗口中，如果中心值为最小值，则以该点为基础，以±45°、0°和90°方向作为近似法线带，然后判断该法线上的象素最小值是否在切点上（即是否在法线的中心点上），再通过检验切点与轮廓法线上亮度极大值的差值是否超过阈值，来判断切点是否为边缘轮廓上的点。

A comprehensive knowledge expression is put forward, a model of self-learning is established by adopting formula of Bayes, through which the threshold values of parameters and certainty factors can be revised automatically. Knowledge acquisition is the most important link for building blast furnace expert system.

高炉专家系统的知识库需要不断改进，为此，建立了高炉炉况规则的自学习模型，针对高炉炉况的判断规则，建立了高炉专家系统的实例学习、类比学习、知识库求精及知识库维护机制。

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。

The effect of decision threshold on OCDMA system BER performance is analyzed.

理论分析了接收机判决阈值的选取对OCDMA系统BER性能的影响。

I want to be a big fish in a small pond.

我要做一条在小池塘里的大鱼。

While the software functioned well, we did not feel the same about their customer support!

虽然该软件运行良好，我们没有同样的感觉他们的客户支持！