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您的检索式：作者名="Chang Shaodong"
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| 1 | Short Cavity DFB Fiber Laser Based Vector Hydrophone for Low Frequency Signal Detection显示文摘一个短洞分布式的反馈(DFB ) 纤维激光被用于低频率声学的信号察觉。有不同中央波长的三 DFB 纤维激光一起被锁住与合适的敏感改进设计做三元素的向量水中听音器,它有广泛、重要的应用到为国家防卫的在水下的声学的监视,油,煤气的探索等等。由波长阶段解调,在不同频率信号下面的放射激光的波长变化能被解释,并且敏感被测试大约 33 dB re pm/g。频率反应范围从 5 Hz 是相当扁平的到 300 Hz。 | Xiaolei ZHANG Faxiang ZHANG Shaodong JIANG Li MIN Ming LI Gangding PENG Jiasheng NI Chang WANG | 2017 | Photonic Sensors2017，7，4： | 3 |
| 2 | Measurement of Attenuation of Ultrasonic Propagating through the Thin Layer Media with Time Delay Spectrum显示文摘The ultrasonic attenuation coefficient is one of the most important acoustic parameters to character the performance of a thin layer media, but it can not be measured due to mutual superposition of multiple reflected waves at the same interface in ultrasonic testing. Ultrasonic pulse echo and lamb wave to evaluate the thin layer media can not obtain attenuation coefficient at present. In this paper, analytical method was used to study the acoustics characteristic of thin layer media with the ultrasonic echo testing. Meanwhile, the process of ultrasonic attenuation measurement was presented. Simulation and experimental investigation is focused on a thin layer of rubber. Attenuation coefficient was introduced and evaluation mathematics model was established by the two echoes cross-correlation with and without the thin layer media based on the time delay spectrum. It involved the parameters related to the acoustic properties of the thin layer media. Through calculating the sound velocity and acoustic impedance with the evaluation model, it can deduce the relation between the attenuation coefficient and the frequency. Through analyzing the simulation results, it indicated that the attenuation coefficients were invariable with the varying of the frequency. However, the attenuation coefficients increased with the frequency increasing by ultrasonic testing the thin layer of rubber. The reason was that the attenuation factor was not taken into account during the simulation. This method overcomes shortcomings that the traditional ultrasonic testing can not evaluate the thin layer media whose thickness is less than motivation wavelength. It is a new solution to study the attenuation characteristic and on-line nondestructive evaluation in the thin layer media. | WANG Xingguo CHANG Junjie SHAN Yingchun TIE Shaodong YAO Man XU Jiujun | 2010 | Chinese Journal of Mechanical Engineering2010，23，1： | 3 |
| 3 | A study of parameter test on fine clay soil in Beijing using the model by Duncan and Chang显示文摘 | Feng Weixing Chang Shaodong Hu Wangyi | 1999 | Chinese Janmal of Rock Mechanics and Engineering1999，18，3： | 1 |
| 4 | Preferable background filtering for next-generation sequencing analysis in non-small cell lung cancer:pericarcinomatous tissues or peripheral blood lymphocytes?显示文摘Dear editor,Lung cancer is the leading cause of cancer-related death worldwide,with the predominant pathological type being non-small cell lung cancer(NSCLC)[1,2].Next-gener-ation sequencing(NGS)analysis is increasingly used to help clinicians select appropriate target therapies,such as epidermal growth factor receptor-tyrosine kinase inhibitors(EGFR-TKIs)for EGFR-mutant patients[3].Both pericarcinomatous tissues and peripheral blood lymphocytes are widely used as normal control for NGS analysis.However,whether pericarcinomatous tissue is suitable for background filtering in mutation analysis remains controversial.According to the whole-genome sequencing data from The Cancer Genome Atlas(TCGA)database,there were some genomic variations in peri-carcinomatous tissue from NSCLC patients,but no driver gene mutation was detected[4,5].Therefore,deep sequencing of pericarcinomatous and tumor tissues is necessary to confirm whether pericarcinomatous tissue harbors low-frequency mutations. | Yaxiong Zhang Lianpeng Chang Wenfeng Fang Yunpeng Yang Lanjun Zhang Shaodong Hong Huaqiang Zhou Yanfang Guan Xin Yi Li Zhang | 2019 | Cancer Communications2019，39，1： | 0 |
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