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| 1 | 加卸载响应比(LURR)理论的实验研究显示文摘利用大尺度岩石试件破坏声发射实验 ,对加卸载响应比 (Load UnloadResponseRatio)理论进行了实验研究。实验采用的加载条件力求能够模拟地下岩石的复杂受力过程。在加载过程中 ,岩石试件内部出现的损伤用声发射技术进行了记录。实验数据经过分析之后所得的结论与加卸载响应比理论预测的结果相符合。把加卸载响应比值Y的变化情况与声发射事件定位的过程相对比 ,也可以进一步看出岩石材料内部的损伤发展过程与加卸载响应比Y值的变化具有一致性。而高Y值的异常情况出现 ,又是在材料发生最终破坏之前 ,所以 ,可以用加卸载响应比理论定量地分析岩石试件损伤演化情况 ,从而对岩石材料的破坏及地震做出预测。实验结果再一次验证了加卸载响应比理论。 | 余怀忠 尹祥础 夏蒙棼 梁乃刚 李敏 许昭永 彭克银 Victor Kukshenko Wu Zhishen Qi Li Surguei Elizarov | 2003 | 中国地震2003，19，1： | 21 |
| 2 | 态矢量方法的实验研究显示文摘在地震等灾变的发生之前,会出现一定的前兆现象。文中通过实验方法对这些前兆现象之一的态矢量的异常变化进行了研究。实验使用声发射技术(AcousticEmission),对三轴应力条件下岩石试件内部微裂纹的产生和扩展进行了记录。实验结果表明在岩石试件最终破坏之前,表征态矢量的相关参量都发生了异常明显的变化,这表明态矢量的异常变化可以被用作为岩石等脆性材料灾变的前兆,使用态矢量方法可以对脆性材料的破坏乃至地震作出预测。 | 余怀忠 尹祥础 张永仙 夏蒙棼 梁乃刚 李敏 许昭永 彭克银 颜玉定 Victor Kukshenko Wu Zhishen Qi Li Surguei Elizarov | 2004 | 地震2004，24，3： | 8 |
| 3 | Preconditioned deconvolution method for high-resolution ghost imaging显示文摘Ghost imaging(GI)can nonlocally image objects by exploiting the fluctuation characteristics of light fields,where the spatial resolution is determined by the normalized second-order correlation function g^(2) .However,the spatial shift-invariant property of g^(2) is distorted when the number of samples is limited,which hinders the deconvolution methods from improving the spatial resolution of GI.In this paper,based on prior imaging systems,we propose a preconditioned deconvolution method to improve the imaging resolution of GI by refining the mutual coherence of a sampling matrix in GI.Our theoretical analysis shows that the preconditioned deconvolution method actually extends the deconvolution technique to GI and regresses into the classical deconvolution technique for the conventional imaging system.The imaging resolution of GI after preconditioning is restricted to the detection noise.Both simulation and experimental results show that the spatial resolution of the reconstructed image is obviously enhanced by using the preconditioned deconvolution method.In the experiment,1.4-fold resolution enhancement over Rayleigh criterion is achieved via the preconditioned deconvolution.Our results extend the deconvolution technique that is only applicable to spatial shift-invariant imaging systems to all linear imaging systems,and will promote their applications in biological imaging and remote sensing for high-resolution imaging demands. | ZHISHEN TONG ZHENTAO LIU CHENYU HU JIAN WANG SHENSHENG HAN | 2021 | Photonics Research2021，9，6： | 5 |
| 4 | The determination of flavonoid contents in mulberry and their scavenging effects on superoxide radicals显示文摘 | Jia Zhishen Tang Mengcheng Wu Jianming | 1999 | Food Chemistry1999，，4： | 5 |
| 5 | Field Experiments of Multi-Channel Oceanographic Fluorescence Lidar for Oil Spill and Chlorophyll-a Detection显示文摘A Multi-channel Oceanographic Fluorescence Lidar(MOFL), with a UV excitation at 355 nm and multiple receiving channels at typical wavelengths of fluorescence from oil spills and chlorophyll-a(Chl-a), has been developed using the Laser- induced Fluorescence(LIF) technique. The sketch of the MOFL system equipped with a compact multi-channel photomultiplier tube(MPMT) is introduced in the paper. The methods of differentiating the oil fluorescence from the background water fluorescence and evaluating the Chl-a concentration are described. Two field experiments were carried out to investigate the field performance of the system, i.e., an experiment in coastal areas for oil pollution detection and an experiment over the Yellow Sea for Chl-a monitoring. In the coastal experiment, several oil samples and other fluorescence substances were used to analyze the fluorescence spectral characteristics for oil identification, and to estimate the thickness of oil films at the water surface. The experiment shows that both the spectral shape of fluorescence induced from surface water and the intensity ratio of two channels(I495/I405) are essential to determine oil-spill occurrence. In the airborne experiment, MOFL was applied to measure relative Chl-a concentrations in the upper layer of the ocean. A comparison of relative Chl-a concentration measurements by MOFL and the Moderate Resolution Imaging Spectroradiometer(MODIS) indicates that the two datasets are in good agreement. The results show that the MOFL system is capable of monitoring oil spills and Chl-a in the upper layer of ocean water. | LI Xiaolong ZHAO Chaofang MA Youjun LIU Zhishen | 2014 | Journal of Ocean University of China2014，13，4： | 5 |
| 6 | Comparative Analysis of Wavelet Transform for Time-Frequency Analysis and Transient Localization in Structural Health Monitoring显示文摘A critical problem facing data collection in structural health monitoring,for instance via sensor networks,is how to extract the main components and useful features for damage detection.A structural dynamic measurement is more often a complex time-varying process and therefore,is prone to dynamic changes in time-frequency contents.To extract the signal components and capture the useful features associated with damage from such nonstationary signals,a technique that combines the time and frequency analysis and shows the signal evolution in both time and frequency is required.Wavelet analyses have proven to be a viable and effective tool in this regard.Wavelet transform(WT)can analyze different signal components and then comparing the characteristics of each signal with a resolution matched to its scale.However,the challenge is the selection of a proper wavelet since various wavelets with varied properties that are to analyze the same data may result in different results.This article presents a study on how to carry out a comparative analysis based on analytic wavelet scalograms,using structural dynamic acceleration responses,to evaluate the effectiveness of various wavelets for damage detection in civil structures.The scalogram’s informative time-frequency regions are examined to analyze the variation of wavelet coefficients and show how the frequency content of a signal changes over time to detect transient events due to damage.Subsequently,damage-induced changes are tracked with time-frequency representations.Towards this aim,energy distribution and sharing information are investigated.The undamaged and damaged simulated comparative results of a structure reveal that the damaged structure were shifted from the undamaged structure.Also,the Bump wavelet shows the best results than the others. | Ahmed Silik Mohammad Noori Wael A.Altabey Ramin Ghiasi Zhishen Wu | 2021 | Structural Durability & Health Monitoring2021，15，1： | 4 |
| 7 | Deep plug-and-play priors for spectral snapshot compressive imaging显示文摘We propose a plug-and-play(Pn P) method that uses deep-learning-based denoisers as regularization priors for spectral snapshot compressive imaging(SCI). Our method is efficient in terms of reconstruction quality and speed trade-off, and flexible enough to be ready to use for different compressive coding mechanisms. We demonstrate the efficiency and flexibility in both simulations and five different spectral SCI systems and show that the proposed deep Pn P prior could achieve state-of-the-art results with a simple plug-in based on the optimization framework. This paves the way for capturing and recovering multi-or hyperspectral information in one snapshot,which might inspire intriguing applications in remote sensing, biomedical science, and material science. Our code is available at: https://github.com/zsm1211/Pn P-CASSI. | SIMING ZHENG YANG LIU ZIYI MENG MU QIAO ZHISHEN TONG XIAOYU YANG SHENSHENG HAN XIN YUAN | 2021 | Photonics Research2021，9，2： | 4 |
| 8 | Visible light photocatalytic decoloration of methylene blue on novel N-doped TiO_2显示文摘Novel N-doped TiO2 (denoted as N-NTA600) was prepared by treating nanotube titanic acid (NTA) in NH3 flow. Its visible light photocatalytic activity,evaluated by decoloration reaction of methylene blue,is higher than that of N-P25(600) prepared by treatment of P25-TiO2 in the same condition. It is suggested that the origin of visible-light photocatalytic activity is single-electron-trapped oxygen vacancy (Vo·) modified by chemisorbed NO. | WANG Yan ZHANG JiWei JIN ZhenSheng WU ZhiShen ZHANG ShunLi | 2007 | Chinese Science Bulletin2007，52，15： | 3 |
| 9 | Field Detection of Chiorophyll-a Concentration in the Sea Surface Layer by an Airborne Oceanographic Lidar显示文摘An airborne oceanographic lidar, with a frequency-tripled Q-switched Nd: YAG laser of 355 nm, has been designed to measure chlorophyll-a (Chl-a) concentration in the sea surface layer by the Ocean Remote Sensing Institute, OUC. The field experi- ment was carried out in the bay which is located south of the Liaodong Peninsula on the 10th of September 2005. After the flight, the raw data were processed and analyzed by the fluorescence-to-Raman ratio method with seawater attenuation coefficients calculated from signal profiles. The results of Chl-a concentration measurements by lidar are shown. The measurements in clear sea water were also compared with those of Chl-a concentration by a Moderate Resolution Imaging Spectroradiometer (MODIS). | LIU Zhishen MA Sen WANG Xin LI Zhigang | 2008 | Journal of Ocean University of China2008，7，1： | 3 |
| 10 | The determination of flavonoid contents in mulberry and their scavenging effects on superoxide radicals显示文摘 | Jia Zhishen Tang Mengcheng Wu Jianming | 1999 | Food Chemistry1999，，4： | 3 |
| 11 | Comparison of Visibility Measurements over Horizontal Path by Micro-pulsed Lidar and Visibility Meter显示文摘As a powerful tool to scan the atmosphere,the 1idar can derive visibility values by directly collecting the backscattering laser light from the atmosphere. Simultaneous measurements of atmospheric visibility by Micro-pulsed lidar(MPL) and a commer-cial visibility meter(VM) NQ-1 have been performed to evaluate the feasibility of the MPL system designed by the Ocean Remote Sensing Laboratory(ORSL) of the Ocean University of China(OUC) from October 21 2005 to November 21 2005 in the Shilaoren Sightseeing Garden on the Qingdao coast. All the 880 data samples obtained by the two instruments have high correlation coeffi-cients(up to 0.86),which indicates it is feasible to utilize MPL to measure atmospheric visibility. | GUO Jinjia SUN Zhaobin LIU Zhishen | 2007 | Journal of Ocean University of China2007，6，3： | 3 |
| 12 | Bond Behavior between Basalt Fiber–Reinforced Polymer Sheet and Concrete Substrate under the Coupled Effects of Freeze-Thaw Cycling and Sustained Load显示文摘 | Jiawei Shi Hong Zhu Zhishen Wu Rudolf Seracino Gang Wu | 2013 | Journal of Composites for Construction2013，，4： | 2 |
| 13 | Incoherent pulse Doppler lidar as the velocimeter system显示文摘This note reports a new type of incoherent pulse laser Doppler lidar velocimeter with iodine molecular filter as a frequency discriminator. Its transmitter subsystem applies a Nd:YAG pulse laser which is injected with a single longitudinal-mode diode pumped continuous seeder laser. The field experiment proved that this velocimeter measurement results are consistent with those measured by photoelectric velocimeter. Measurements of eight different velocities show that the standard deviation is 0.56m/s, the range resolution is 3.75m. | Zhishen Liu Xiaoquan Song Jintao Liu Kailin Zhang | 2002 | Chinese Science Bulletin2002，47，6： | 2 |
| 14 | Formation of the Yazi Spring Stream and its significance on tectonics-climate on the northern slope of Kunlun Mountains显示文摘The sequences of fluvial terraces in the Yazi Spring Stream are signs of the stepwise uplift of the Kunlun Mountains in the northern part of the Tibetan Plateau since the Late Pleistocene. Geomorphic and sedimentary features of the terraces reveal that they have resulted from the phased tectonic uplift and the consequent river incision in the northern plateau. Using the method of Single-aliquot Regenerative-dose (SAR) Protocol and Radiocarbon 14C dating, the deposit ages of three-grade terraces were ob- tained, which are 57.5, 12.8 and 5.7 kaBP, respectively. The features and ages of terraces reveal that the incision rate of the stream accelerated at the beginning of the Holocene. The incision rate changed suddenly at 12.8 KaBP, from 0.43±0.07 mm/a to 1.59±0.55 mm/a. This implicates that uplift of the Kunlun Mountains is intensive at the first onset of the Holo- cene, corresponding to the obvious change of slip-rate on the Altyn Tagh Fault. But its uplift rate is much lower than that of the latter, which suggests that growth of the northern mar- gin of the Tibetan Plateau is stronger than its interior. | CHANG Hong ZHANG Peizhen AN Zhishen WANG Xulong QIANG Xiaoke FU Chaofeng | 2005 | Chinese Science Bulletin2005，50，18： | 2 |
| 15 | ROV Based Underwater Blurred Image Restoration显示文摘In this paper, we present a method of ROV based image processing to restore underwater blurry images from the theory of light and image transmission in the sea. Computer is used to simulate the maximum detection range of the ROV under different water body conditions. The receiving irradiance of the video camera at different detection ranges is also calculated. The ROV’s detection performance under different water body conditions is given by simulation. We restore the underwater blurry images using the Wiener filter based on the simulation. The Wiener filter is shown to be a simple useful method for underwater image restoration in the ROV underwater experiments. We also present examples of restored images of an underwater standard target taken by the video camera in these experiments. | LIU Zhishen *, DING Tianfu, WANG GangOcean Remote Sensing Institute (ORSI), Ocean Unversity of China, Qingdao 266003, P..R.China | 2003 | Journal of Ocean University of Qingdao2003，2，1： | 2 |
| 16 | RECENT DEVELOPMENTS IN FRP STRENGTHENING TECHNIQUES显示文摘 | Zhishen WU( | 2004 | 工业建筑2004，34，z1： | 2 |
| 17 | The determination of flavonoid contents in mulberry and their scavenging effects on superoxide radicals 显示文摘 | Zhishen J Mengeheng T Jianming W | 1999 | Food Chem1999，64，： | 1 |
| 18 | Miscibility and hydrogen-bonding interactions in blends of carbon dioxide/epoxy propane copolymer with poly( p -vinylphenol) 显示文摘 | Zhihao Zhang Zhishen Mo Hongfang Zhang | 2002 | J Polym Sci: Part B: Polym Phy2002，40，6： | 1 |
| 19 | Constitutive model for time-dependent behavior of FRP-concrete interface 显示文摘 | Wu Zhishen Diab Hesham | 2007 | Journal of Composites for Construction2007，11，5： | 1 |
| 20 | Ultimate Flexural Strength of nor Mal Section of FRP Confined RC Circular Colnmns显示文摘 | Gu Dongsheng Wu Gang Wn Zhishen | | 0，，： | 1 |
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