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| 1 | DCT域图像水印:嵌入对策和算法显示文摘DCT域的隐形水印应嵌入哪里 ,水印才足够稳健 ?尽管许多关于DCT域水印算法的文献赞成水印应放在对视觉效果重要的分量 ,但DC分量总是被无一例外地排除在外 .本文提出了一个DCT域隐形水印的嵌入对策和一个应用该对策的自适应水印算法 .基于对图像DCT系数振幅的定量分析 ,我们指出 :DC分量比任何AC分量有更大的感觉容量 ,从稳健性的角度 ,DC分量最适合用来嵌入水印 .应用这个对策 ,本文提出了一个把视觉系统纹理掩蔽特性结合到水印编码过程的自适应水印算法 .实验结果有效地支持了这个结论 ,所产生的隐形水印体现了很好的稳健性 . | 黄继武 Yun Q.SHI 程卫东 | 2000 | 电子学报2000，28，4： | 290 |
| 2 | 快速重同步的有意义音频水印盲检测算法显示文摘同步是音频水印需要解决的关键问题之一 目前的音频水印算法缺乏有效的同步技术 应用通信网同步方法 ,提出了一种快速重同步音频有意义水印盲检测算法 算法的特点如下 :①利用时域水印技术嵌入同步信息以对抗音频在时间轴上可能受到的攻击 ,如裁剪、网络传输中的丢包等 ;②基于数字通信中的帧同步技术 ,实现了音频信号的快速重同步 ;③在保证不可感知性和稳健性的良好平衡下实现了水印的盲检测 ;④应用BCH编码来降低水印的检测错误率 实验结果表明 ,隐藏的水印在对抗噪声、MP3编码和剪裁的稳健性上都达到了较好的性能 。 | 王泳 黄继武 Yun Q.Shi | 2003 | 计算机研究与发展2003，40，2： | 21 |
| 3 | 基于匹配滤波的有意义图像水印算法显示文摘图像隐形水印是解决数字媒体版权保护的有效手段 .目前的大多数水印算法采用伪随机序列构成水印 ,因而只能给出“Yes”(有水印 )或“No”(无水印 )的回答 .嵌入有意义的水印在一些应用场合更加重要 ,但同时也带来了更多的困难 .嵌入有意义的水印必须解决二个问题 :(1)嵌入的水印具有一定的数据量 ;(2 )从有失真的水印图像中正确地提取嵌入的水印 .本文应用数字通信的理论和方法 ,提出了一个嵌入有意义字符串的DCT域隐形水印算法 .该算法采用BCH编码和匹配滤波来降低误码率 .应用所提出的算法 ,把一个 32个字符组成的水印嵌入到 2 5 6× 2 5 6的图像中并达到了较好的稳健性 .在水印图像信噪比受Gaussian加性噪声干扰下降到 2 6dB时 ,仍实现了对嵌入水印零错误概率的检测 . | 黄继武 G.F.Elmasry 程卫东 Yun Q.Shi | 2001 | 电子学报2001，29，4： | 16 |
| 4 | Localization Algorithm of Indoor Wi-Fi Access Points Based on Signal Strength Relative Relationship and Region Division显示文摘Precise localization techniques for indoor Wi-Fi access points(APs)have important application in the security inspection.However,due to the interference of environment factors such as multipath propagation and NLOS(Non-Line-of-Sight),the existing methods for localization indoor Wi-Fi access points based on RSS ranging tend to have lower accuracy as the RSS(Received Signal Strength)is difficult to accurately measure.Therefore,the localization algorithm of indoor Wi-Fi access points based on the signal strength relative relationship and region division is proposed in this paper.The algorithm hierarchically divide the room where the target Wi-Fi AP is located,on the region division line,a modified signal collection device is used to measure RSS in two directions of each reference point.All RSS values are compared and the region where the RSS value has the relative largest signal strength is located as next candidate region.The location coordinate of the target Wi-Fi AP is obtained when the localization region of the target Wi-Fi AP is successively approximated until the candidate region is smaller than the accuracy threshold.There are 360 experiments carried out in this paper with 8 types of Wi-Fi APs including fixed APs and portable APs.The experimental results show that the average localization error of the proposed localization algorithm is 0.30 meters,and the minimum localization error is 0.16 meters,which is significantly higher than the localization accuracy of the existing typical indoor Wi-Fi access point localization methods. | Wenyan Liu Xiangyang Luo Yimin Liu Jianqiang Liu Minghao Liu Yun Q.Shi | 2018 | Computers, Materials & Continua2018，，4： | 3 |
| 5 | 基于数值模拟气液比对豆胶气泡雾化的影响显示文摘根据气泡雾化理论,以豆胶为研究对象,对不同气液比豆胶与空气在气泡雾化喷嘴内部的流动情况进行了混合数值模拟。结果表明:试验条件下,气液比对气液在喷嘴内的流场分布有显著影响;雾化总能量,随气液比的增大而降低;气耗量,随气液比的增大而升高;最佳气液比为0.04。以混合模拟得到的出口数据为条件进行了仿真验证,结果表明:通过雾场仿真得到的最佳气液比,与混合模拟得到的理论最佳气液比值相吻合。 | 花军 张文程 贾娜 Sheldon Q.Shi | 2014 | 东北林业大学学报2014，42，2： | 3 |
| 6 | Tuning the morphologies of SiC nanowires via the change of the Co_xSi_y melts显示文摘SiC nanowires and SiC/SiO2 core-shell structural nanowires were synthesized via a simple thermal evaporation of CoxSiy melts at the temperature of 1500?C. The morphologies and yields of those SiC nanowires can be tuned by altering the composition of CoxSiy. Nanowires obtained by thermal evaporation of Co Si are composed of SiC/SiO2 core-shell nanostructures with lengths up to several hundreds of micrometers, diameters of 4050 nm, and the thickness of amorphous SiO2 wrapping shell about 20 nm. SiC nanowires prepared by thermal evaporation of Co Si2 and Co2 Si melt are found to be hexagonal-prism-shaped nanorods, and the diameter of those nanorods is about 150 nm and the length is about 10 microns. All the SiC nanowires obtained possess [111] preferred growth direction with a high density stacking faults and twin defects. Taking into consideration the binary alloy diagram of Co Si and the participation of oxygen, we propose the vapor-solid growth mechanism of SiC nanowires and discuss the effect of the supersaturation of Si O on the morphology and yields of SiC nanowires. | J.J.Chen Y.Pan W.H.Tang Q.Shi | 2010 | Nano-Micro Letters2010，2，1： | 2 |
| 7 | 豆基蛋白胶气泡雾化机理的数值模拟显示文摘根据豆基蛋白胶的流动特性,确定了其本构方程,为数值模拟研究提供了相关的参数;选择设计了一种气泡雾化喷嘴,分别对水和空气以及豆基蛋白胶和空气在喷嘴内部的流动情况进行了数值模拟研究。结果表明:豆基蛋白胶是非牛顿流体中的一种假塑性流体,它在气泡雾化喷嘴中的流动符合幂律模型;这种假塑性流体能和水一样与空气在气泡雾化喷嘴内部进行很好地混合,其压力图、速度矢量图、组分体积分数图符合流体力学的运动规律,这为具有高黏度特性的豆基蛋白胶进行雾化实验提供了理论依据。 | 张文程 花军 贾娜 Sheldon Q.Shi | 2013 | 东北林业大学学报2013，41，2： | 2 |
| 8 | The Lobster Eye Imager for Astronomy Onboard the SATech-01 Satellite显示文摘The Lobster Eye Imager for Astronomy(LEIA),a pathfinder of the Wide-field X-ray Telescope of the Einstein Probe mission,was successfully launched onboard the SATech-01 satellite of the Chinese Academy of Sciences on2022 July 27.In this paper,we introduce the design and on-ground test results of the LEIA instrument.Using stateof-the-art Micro-Pore Optics(MPO),a wide field of view of 346 square degrees(18.6°×18.6°)of the X-ray imager is realized.An optical assembly composed of 36 MPO chips is used to focus incident X-ray photons,and four large-format complementary metal-oxide semiconductor(CMOS)sensors,each of size 6 cm×6 cm,are used as the focal plane detectors.The instrument has an angular resolution of 4’-8’(in terms of FWHM)for the central focal spot of the point-spread function,and an effective area of 2-3 cm^(2) at 1 keV in essentially all the directions within the field of view.The detection passband is 0.5-4 keV in soft X-rays and the sensitivity is2-3×10^(-11) erg s^(-1) cm^(-2)(about 1 milliCrab)with a 1000 s observation.The total weight of LEIA is 56 kg and the power is 85 W.The satellite,with a design lifetime of 2 yr,operates in a Sun-synchronous orbit of 500 km with an orbital period of 95 minutes.LEIA is paving the way for future missions by verifying in flight the technologies of both novel focusing imaging optics and CMOS sensors for X-ray observation,and by optimizing the working setups of the instrumental parameters.In addition,LEIA is able to carry out scientific observations to find new transients and to monitor known sources in the soft X-ray band,albeit with limited useful observing time available. | Z.X.Ling X.J.Sun C.Zhang S.L.Sun G.Jin S.N.Zhang X.F.Zhang J.B.Chang F.S.Chen Y.F.Chen Z.W.Cheng W.Fu Y.X.Han H.Li J.F.Li Y.Li Z.D.Li P.R.Liu Y.H.Lv X.H.Ma Y.J.Tang C.B.Wang R.J.Xie Y.L.Xue A.L.Yan Q.Zhang C.Y.Bao H.B.Cai H.Q.Cheng C.Z.Cui Y.F.Dai D.W.Fan H.B.Hu J.W.Hu M.H.Huang Z.Q.Jia C.C.Jin D.Y.Li J.Q.Li H.Y.Liu M.J.Liu Y.Liu H.W.Pan Y.L.Qiu M.Sugizaki H.Sun W.X.Wang Y.L.Wang Q.Y.Wu X.P.Xu Y.F.Xu H.N.Yang X.Yang B.Zhang M.Zhang W.D.Zhang Z.Zhang D.H.Zhao X.Q.Cong B.W.Jiang L.H.Li X.B.Qiu J.N.Sun D.T.Su J.Wang C.Wu Z.Xu X.M.Yang S.K.Zhang Z.Zhang N.Zhang Y.F.Zhu H.Y.Ban X.Z.Bi Z.M.Cai W.Chen X.Chen Y.H.Chen Y.Cui X.L.Duan Z.G Feng Y.Gao J.W.He T.He J.J.Huang F.Li J.S.Li T.J.Li T.T.Li H.Q.Liu L.Liu R.Liu S.Liu N.Meng Q.Shi A.T.Sun Y.M.Wang Y.B.Wang H.C.Wu D.X Xu Y.Q Yang Y.Yang X.S.Yu K.X.Zhang Y.L.Zhang Y.H.Zhang Y.T.Zhang H.Zhou X.C.Zhu J.S.Cheng L.Qin L.Wang Q.L.Wang M.Bai R.L.Gao Z.Ji Y.R.Liu F.L.Ma Y.J.Shi J.Su Y.Y.Tan J.Z.Tong H.T.Xu C.B.Xue G.F.Xue W.Yuan | 2023 | Research in Astronomy and Astrophysics2023，23，9： | 2 |
| 9 | In-Situ Chemosynthesis of ZnO Nanoparticles to Endow Wood with Antibacterial and UV-Resistance Properties显示文摘Hybrid wood materials have attracted considerable attention because they have combined advantages of both wood and inorganic compounds. This work investigated the microstructural morphology, thermal stability, ultraviolet(UV) stability, and antibacterial property of composites made from wood/ZnO hybrid materials through a facile in-situ chemosynthesis methods. The X-ray diffraction(XRD) and thermogravimetric analysis(TGA) results indicated that the synthesized ZnO particles had an average grain size of about 10.8 nm. The scanning electron microscopy(SEM) observations showed that ZnO nanoflowers self-assembled with nanosheets were presented in wood cell lumens and increased with increasing Zn^(2+)concentrations. ZnO nanoparticles were also generated in the wood cell wall, which was confirmed by the results of energy-dispersive spectroscopy(EDS). The TGA tests also indicated that the thermal stability of wood/ZnO hybrid materials was improved after the formation of ZnO inorganic particles. Finally, the results of antibacterial efficacy tests and UV resistance tests revealed that ZnO nanoparticles showed a promising future as antimicrobial agents against Escherichia coli(E.coli) and UV resistance agents for wood protection. | Youming Dong Yutao Yan Huandi Ma Shifeng Zhang Jianzhang Li Changlei Xia Sheldon Q.Shi Liping Cai | 2017 | Journal of Materials Science & Technology2017，33，3： | 2 |
| 10 | Soybean meal‐based adhesive enhanced by MUF resin显示文摘 | QiangGao Sheldon Q.Shi ShifengZhang JianzhangLi XiaomeiWang WubinDing KaiwenLiang JinwuWang | 2012 | J Appl Polym Sci2012，，5： | 1 |
| 11 | A Soy Protein-Based Composite Film with a Hierarchical Structure Inspired by Nacre显示文摘Soy protein-based composite film is a potential replacement for petroleum-based film with multipurpose applica-tions and cleaner production.It is difficult to improve both the tensile strength and toughness of a protein-based film without sacrificing its elongation.In this study,inspired by the hierarchical structure of nacre,a facile yet delicate strategy was developed to fabricate a novel bio-based film with excellent toughness and high strength.Triglycidylamine(TGA)crosslinked soy protein(SPI)as hard phase and thermoplastic polyurethane elastomer(TPU)as soft phase comprise an alternative lay-up hierarchical structure.The interface of these two phases is enhanced using triglycidylamine(TGA)surface-modified TPU(MTPU).The tensile strength of SPI/MTPU/TGA films increases by 392%to 7.78 MPa and their toughness increases by 391%to 8.50 MJ/m^(3) compared to soy protein/glycerol film.The proposed hierarchical structure can also be extended to other high-performance materials and polymers. | Yecheng Xu Chaojie Xu Mingsong Chen Jianzhang Li Ling Zeng Jing Luo Qiang Gao Sheldon Q.Shi | 2022 | Journal of Renewable Materials2022，10，3： | 1 |
| 12 | Dynamic adhensive wettability of wood显示文摘 | Sheldon Q.Shi | | 0，，01： | 1 |
| 13 | Pulsed Microfluid Force-Based On-Chip Modular Fabrication for Liver Lobule-Like 3D Cellular Models显示文摘In vitro three-dimensional(3D)cellular models with native tissue-like architectures and functions have potential as alternatives to human tissues in regenerative medicine and drug discovery.However,it is difficult to replicate liver constructs that mimic in vivo microenvironments using current approaches in tissue engineering because of the vessel-embedded 3D structure and complex cell distribution of the liver.This paper reports a pulsed microflow-based on-chip 3D assembly method to construct 3D liver lobule-like models that replicate the spatial structure and functions of the liver lobule.The heterogeneous cell-laden assembly units with hierarchical cell distribution are fabricated through multistep photopatterning of different cell-laden hydrogels.Through fluid force interaction by pulsed microflow,the hierarchical assembly units are driven to a stack,layer by layer,and thus spatially assemble into 3D cellular models in the closed liquid chamber of the assembly chip.The 3D models with liver lobule-like hexagonal morphology and radial cell distribution allow the dynamic perfusion culture to maintain high cell viability and functional expression during long-term culture in vitro.These results demonstrate that the fabricated 3D liver lobule-like models are promising for drug testing and the study of individual diagnoses and treatments. | J.Cui H.P.Wang Q.Shi T.Sun | 2021 | Cyborg and Bionic Systems2021，，1： | 0 |
| 14 | Mechanical Behavior of Bamboo,and Its Biomimetic Composites and Structural Members:A Systematic Review显示文摘Bamboo is a typical biological material widely growing in nature with excellent physical and mechanical properties.It is lightweight with high strength and toughness.The naturally optimized bamboo structure,which has inspired global material scientists and engineers for decades,is significantly important for the bionic design of novel structural materials with ultra-light,ultra-strong,or ultra-tough and comprehensive properties.Typical literature on innovative composite materials and structural members inspired by bamboo are reviewed in this paper,and the research progress and prospects in this field are expounded in three parts.First,the structural characteristics of the bamboo wall layer along the thickness and height directions are described in terms of chemical composition,gradient structure,pore structure,and hollow structure with variable cross-section.Second,this paper summarizes the research progress on new composite materials and structural components by applying bamboo’s structural features from the perspective of sustainability,designability,and customization.Finally,given the limitations of current research,the biomimetic scientific research on bamboo’s structural characteristics is prospected from the interpretation of bamboo structure,new bamboo-like materials,and structural design optimization perspectives,providing a reference for future research on biomimetic aspects of biomass. | Shanyu Han Yuyuan He Hanzhou Ye Xueyong Ren Fuming Chen Kewei Liu Sheldon Q.Shi Ge Wang | 2024 | Journal of Bionic Engineering2024，21，1： | 0 |
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