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| 1 | Digital Twins and Cyber Physical Systems toward Smart Manufacturing and Industry 4.0:Correlation and Comparison显示文摘State-of-the-art technologies such as the Internet of Things(IoT),cloud computing(CC),big data analytics(BDA),and artificial intelligence(AI)have greatly stimulated the development of smart manufacturing.An important prerequisite for smart manufacturing is cyber-physical integration,which is increasingly being embraced by manufacturers.As the preferred means of such integration,cyber-physical systems(CPS)and digital twins(DTs)have gained extensive attention from researchers and practitioners in industry.With feedback loops in which physical processes affect cyber parts and vice versa,CPS and DTs can endow manufacturing systems with greater efficiency,resilience,and intelligence.CPS and DTs share the same essential concepts of an intensive cyber-physical connection,real-time interaction,organization integration,and in-depth collaboration.However,CPS and DTs are not identical from many perspectives,including their origin,development,engineering practices,cyber-physical mapping,and core elements.In order to highlight the differences and correlation between them,this paper reviews and analyzes CPS and DTs from multiple perspectives. | Fei Tao Qinglin Qi Lihui Wang A.Y.C.Nee | 2019 | Engineering2019，5，4： | 84 |
| 2 | 培育世界一流科技期刊的机遇、挑战与对策研究显示文摘中央深化改革委员会第五次会议审议通过《关于深化改革培育世界一流科技期刊的意见》一年多来,中国科学技术协会联合相关部门对标中央要求,合力协同推进,联手打出系列组合拳,受到国内外科技界、期刊界广泛关注.对科技期刊怎么看、怎么办,已成为科技界的大课题、大事件.何为世界一流科技期刊、为什么要培育世界一流期刊、如何有效推进期刊建设等问题,也在各界引起广泛讨论.笔者在此分享一些个人的思考. | 张昕 王素 刘兴平 | 2020 | 科学通报2020，65，9： | 82 |
| 3 | Coding metamaterials, digital metamaterials and programmable metamaterials显示文摘Metamaterials are artificial structures that are usually described by effective medium parameters on the macroscopic scale,and these metamaterials are referred to as‘analog metamaterials’.Here,we propose‘digital metamaterials’through two steps.First,we present‘coding metamaterials’that are composed of only two types of unit cells,with 0 and p phase responses,which we name‘0’and‘1’elements,respectively.By coding‘0’and‘1’elements with controlled sequences(i.e.,1-bit coding),we can manipulate electromagnetic(EM)waves and realize different functionalities.The concept of coding metamaterials can be extended from 1-bit coding to 2-bit coding or higher.In 2-bit coding,four types of unit cells,with phase responses of 0,p/2,p,and 3p/2,are required to mimic the‘00’,‘01’,‘10’and‘11’elements,respectively.The 2-bit coding has greater freedom than 1-bit coding for controlling EM waves.Second,we propose a unique metamaterial particle that has either a‘0’or‘1’response controlled by a biased diode.Based on this particle,we present‘digital metamaterials’with unit cells that possess either a‘0’or‘1’state.Using a field-programmable gate array,we realize digital control over the digital metamaterial.By programming different coding sequences,a single digital metamaterial has the ability to manipulate EM waves in different manners,thereby realizing‘programmable metamaterials’.The above concepts and physical phenomena are confirmed through numerical simulations and experiments using metasurfaces. | Tie Jun Cui Mei Qing Qi Xiang Wan Jie Zhao Qiang Cheng | 2014 | Light(Science & Applications)2014，3，1： | 130 |
| 4 | A new class of scrambling transformation and its application in the image information covering显示文摘This paper studies two kinds of nonlinear transformations, namely the higher-dimensional Arnold transformation and the higher-dimensional Fibonacci Q-transformation and discusses the scrambling action of the two transformations focusing on the phase space of the digital images. A sufficient and necessary condition that a matrix transformation of digital image has periodicity is given. The results show that the two transformations have potential application in the storage and transportation of image information for the purpose of information security. | 齐东旭 邹建成 韩效宥 | 2000 | Science China(Technological Sciences)2000，43，3： | 77 |
| 5 | Programmable time-domain digital-coding metasurface for non-linear harmonic manipulation and new wireless communication systems显示文摘Optical non-linear phenomena are typically observed in natural materials interacting with light at high intensities, and they benefit a diverse range of applications from communication to sensing. However,controlling harmonic conversion with high efficiency and flexibility remains a major issue in modern optical and radio-frequency systems. Here, we introduce a dynamic time-domain digital-coding metasurface that enables efficient manipulation of spectral harmonic distribution. By dynamically modulating the local phase of the surface reflectivity, we achieve accurate control of different harmonics in a highly programmable and dynamic fashion, enabling unusual responses, such as velocity illusion. As a relevant application, we propose and realize a novel architecture for wireless communication systems based on the time-domain digital-coding metasurface, which largely simplifies the architecture of modern communication systems, at the same time yielding excellent performance for real-time signal transmission. The presented work, from new concept to new system, opens new pathways in the application of metamaterials to practical technology. | Jie Zhao Xi Yang Jun Yan Dai Qiang Cheng Xiang Li Ning Hua Qi Jun Chen Ke Guo Dong Bai Shuo Liu Shi Jin Andrea Alù Tie Jun Cui | 2019 | National Science Review2019，6，2： | 46 |
| 6 | Policy Analysis and Development Evaluation of Digital Trade:An International Comparison显示文摘As an extension of traditional trade,digital trade is a new type of trade in the era of the digital economy.In this paper,we first analyze the digital trade-related strategies of eight leading economies through word clouds and dissect China s digital trade-related policies using the word frequency method by sorting through the digital trade-related policy documents of 26 economies and Chinese provinces.We then evaluate the status quo of digital trade development in 111 countries and Chinese provinces by building a digital trade index system to determine the development environment and market potential.The results show that all countries attach great importance to digital technology,data and government guidance in the development of digital trade.The results also reveal that'development,''service'and'construction'are the three most frequently used words in various Chinese documents.The overall level of China s digital trade is at the global vanguard,but is characterized by uneven regional development.In the era of digital trade,traditional international trade theory is also in urgent need of breakthroughs and innovation. | Shuzhong Ma Jiwen Guo Hongsheng Zhang | 2019 | China & World Economy2019，27，3： | 29 |
| 7 | 便携式信息终端在医院信息化建设中的应用显示文摘 | 于广远 盛楠 李玉萍 张素琴 高素珍 冉红 | 2005 | 中华医院管理杂志2005，21，4： | 22 |
| 8 | 基于DRM数字调幅广播的高频外辐射源雷达实验研究显示文摘该文介绍了利用新近研制的全数字主被动一体化高频地波雷达系统,开展我国首次基于DRM(Digital Radio Mondiale)数字调幅广播的高频外辐射源雷达(HF Passive Bistatic Radar,HFPBR)实验研究的情况。论述了该体制雷达的理论、关键技术、探测设备和外场实验,给出了不同条件下(包括地波模式、天波模式、天地波混合传播模式)的典型探测结果,在国际上首次从实验上证实了利用DRM广播信号实现超视距无源探测的技术可行性,为该探测技术的发展奠定了理论与实验基础。 | 万显荣 赵志欣 柯亨玉 程丰 饶云华 龚子平 | 2012 | 雷达学报(中英文)2012，1，1： | 22 |
| 9 | Role of digital single-operator cholangioscopy in the diagnosis and treatment of biliary disorders显示文摘Due to the need for improvement in the diagnosis and minimally invasive therapy of the bile duct disorders new technologies for cholangioscopy have been recently developed. Per-oral cholangioscopy has become an important diagnostic and therapeutic tool leading to avoidance of aggressive and unnecessary surgery in many clinical scenarios. This paper focuses on the newly developed SpyGlass DS technology, its advantages, and the technique of single-operator cholangioscopy(SOC), biliary indications and possible adverse events. We also review the available literature; discuss the limitations and future expectations.Digital SOC(D-SOC) is a useful technique, which provides endoscopic imaging of the biliary tree, optical diagnosis, biopsy under direct vision and therapeutic interventions. The implementations are diagnostic and therapeutic. Diagnostic indications are indeterminate biliary strictures, unclear filling defects, staging of cholangiocarcinoma, staging of ampullary tumors(extension into the common bile duct), unclear bile duct dilation, exploring cystic lesions of the biliary tree,unexplained hemobilia, posttransplant biliary complications. Therapeutic indications are lithotripsy of difficult stones, retrieval of migrated stents, foreign body removal, guide wire placement, transpapillary gallbladder drainage and endoscopic tumor ablative therapy. Most studied and established indications are the diagnosis of indeterminate biliary stricture and intraductal lithotripsy of difficult stones. The adverse events are not different and more common compared to those of Endoscopic retrograde cholangiopancreatography(ERCP)alone. D-SOC is a safe and effective procedure, adjunct to the standard ERCP and the newly available digital technology overcomes many of the limitations of the previous generations of cholangioscopes. | Petko Karagyozov Irina Boeva Ivan Tishkov | 2019 | World Journal of Gastrointestinal Endoscopy2019，11，1： | 22 |
| 10 | Digital Curation和Digital Preservation之概念辨析显示文摘【目的】对Digital Curation和Digital Preservation这两个相关概念进行辨析。【文献范围】以历史上与Digital Curation和Digital Preservation相关的重要文献和重要报告为基础,并调研分析DCC、JISC、ARL等主要机构对两个概念的各种定义。【方法】基于两个概念形成的历史,分析两个概念产生和发展的深层原因;基于当前主要研究团体和个人对两个概念的多个定义,分析两个概念的不同;进一步从8个方面入手,多角度对这两个概念的不同点进行对比分析。【结果】Digital Curation和Digital Preservation虽然都可用于数字保存和管理,但它们的确是两个不同的概念,在很多方面有较大的差别。【局限】尚需对Digital Curation和Digital Preservation所包括的具体工作内容进行较为细致的对比分析。【结论】Digital Curation和Digital Preservation是两个不同的概念,但二者互补,图书馆应当采用一种更为积极主动的方式来推进数字保存和管理。 | 张智雄 吴振新 刘建华 郭红梅 | 2014 | 现代图书情报技术2014，，1： | 20 |
| 11 | Application of a medical image processing system in liver transplantation显示文摘BACKGROUND: At present, imaging is used not only to show the form of images, but also to make three-dimensional (3D) reconstructions and visual simulations based on original data to guide clinical surgery. This study aimed to assess the use of a medical image-processing system in liver transplantation surgery. METHODS: The data of abdominal 64-slice spiral CT scan were collected from 200 healthy volunteers and 37 liver cancer patients in terms of hepatic arterial phase, portal phase, and hepatic venous phase. A 3D model of abdominal blood vessels including the abdominal aorta system, portal vein system, and inferior vena cava system was reconstructed by an abdominal image processing system to identify vascular variations. Then, a 3D model of the liver was reconstructed in terms of hepatic segmentation and liver volume was calculated. The FreeForm modeling system with a PHANTOM force feedback device was used to simulate the real liver transplantation environment, in which the total process of liver transplantation was completed. RESULTS: The reconstructed model of the abdominal blood vessels and the liver was clearly demonstrated to be three- dimensionally consistent with the anatomy of the liver, in which the variations of abdominal blood vessels were identified and liver segmentation was performed digitally. In the model, liver transplantation was simulated subsequently, and different modus operandi were selected successfully. CONCLUSION: The digitized medical image processing system may be valuable for liver transplantation. | Fang, Chi-Hua Li, Xiao-Feng Li, Zhou Fan, Ying-Fang Lu, Chao-Min Huang, Yan-Peng Peng, Feng-Ping | 2010 | Hepatobiliary & Pancreatic Diseases International2010，9，4： | 19 |
| 12 | 国内外Data Curation研究综述显示文摘文章通过文献调研,对国内外Data Curation的内涵、相关研究论文、科研项目进行分析比较,总结出我国目前相关发展状况及未来发展趋势。 | 李文文 陈雅 | 2013 | 情报资料工作2013，34，5： | 17 |
| 13 | Noninvasive three-dimensional computed tomographic angiography in preoperative detection of intracranial arteriovenous malformations显示文摘Obejctive To assess the value of noninvasive three dimensional computed tomographic angiography (3D CTA) in preoperative detection of intracranial arteriovenous malformations (AVMs) Methods A prospective evaluation at a single institute over a 2 year period included 23 patients suspected of intracranial AVMs All patients underwent 3D CTA and digital subtraction angiography (DSA) Results from both procedures were compared Results 3D CTA imaging provided excellent visualization of intracranial AVMs The false positive error and false negative error were zero in our sample The details of arterial supply (numerical measure, orientation, caliber and routing) and vascular nidus (size, morphosis and location) provided by 3D CTA images were the same as DSA and the details of venous drainage were an approximate match Additionally, 3D CTA can depict tridimensional anatomical information for AVMs and their relationship to adjacent structures, a function not possible with DSA This assisted the surgeons in making better surgical planning and reduced trauma As a non invasive course, there were no related complications in the course of 3D CTA processing Conclusions DSA is still regarded as the gold standard for intracranial AVMs detection The modality of 3D CTA is accurate, noninvasive, nearly risk free and low price; we could routinely use it instead of or as a supplement to DSA, in the preoperative detection of suspected intracranial AVMs and postoperative radiological follow up 3D CTA adds tridimensional aspect and assists the surgeon in a the more accurate therapeutic scheme Preliminary data suggest that 3D CTA is playing a favorable role in the assessment of patients with intracranial | 吴劲松 陈衔城 史玉泉 陈爽 | 2000 | Chinese Medical Journal2000，，10： | 17 |
| 14 | 数字故事:让教学更生动显示文摘数字故事(Digital Storytelling)是利用电脑以及相关视频编辑软件,选择围绕故事主题的图片、视频、音乐、动画等资源,这些资源最好是自己生活中的,配上讲述者自己的声音,按照讲述故事的形式制成的3-5分钟的数字化小短片。数字故事起源于美国,它的创始者以及推动者Dana W.Atchley曾是一个舞台剧表演者,后来,他利用电脑将图片、视频和音乐组合起来讲述舞台剧中的故事。这种方法逐渐得到社会上很多人的青睐,尤其是在教育领域得到应用后引起了很大的反响。现在美国有很多这种培训学生制作数字故事的机构,像Digital Storytelling Association、Center for Digital Storytelling、Scott County、 Digitales、Springfields等等。它们通常是以大学与中小学合作的形式,为学习者提供学习的场所和机会, 还开展各种竞赛激发学生的热情,例如Island Movie Contest。 | 何玲 | 2006 | 计算机教与学.现代教学2006，，3： | 16 |
| 15 | Application of gemstone spectral imaging for efficacy evaluation in hepatocellular carcinoma after transarterial chemoembolization显示文摘AIM: To assess the value of gemstone spectral imaging(GSI) in efficacy evaluation in hepatocellular cancer(HCC) after transcatheter arterial chemoembolization(TACE) treatment.METHODS: Thirty patients with HCC underwent GSI, including nonenhanced, arterial, portalvenous and delayed phase scans, after TACE treatment. Arterial phase images were acquired with GSI for reconstruction of virtual nonenhanced images and color overlay images. Digital subtraction angiography(DSA) was performed in all these patients. Two blinded and independent readers evaluated the data in two reading sessions; standard nonenhanced, arterial, portalvenous, and delayed phase images were read in session A, and the optimal monochromatic images, iodine/water based images and spectrum features were read in session B. Sensitivity and specificity were calculated with the DSA data as the reference standard. The sensitivity and specificity were compared using the χ2 test.RESULTS: DSA revealed 154 lesions in 30 patients, and 100 of them had blood supply. Overall sensitivity and specificity were 72%( 72/100) and 77.8 %(42/54) for session A, and 97%(97/100) and 94.4%(51/54) for session B, respectively. The sensitivity and specificity of the two reading sessions were significantly different(χ2 = 23.04, χ2 = 7.11, P < 0.05).CONCLUSION: Compared with conventional CT, GSI could significantly improve the detection of small and multiple lesions without increasing the radiation dose. Based on spectrum features, GSI could assess tumor homogeneity and more accurately identify residual tumors and recurrent or metastatic lesions during efficacy evaluation and follow-up in HCC after TACE treatment. | Qi-Yu Liu Chuan-Dong He Ying Zhou Dan Huang Hua Lin Zhong Wang Dong Wang Jin-Qiu Wang Li-Ping Liao | 2016 | World Journal of Gastroenterology2016，22，11： | 15 |
| 16 | 基于DSP与FPGA的变流器通用控制平台研究显示文摘提出一种基于DSP和现场可编程门阵列(FPGA)双CPU结构的新型变流器控制系统方案,其中DSP完成变流器控制策略的实现,主要包括:最大功率点跟踪、电压电流双闭环控制、低电压穿越控制、通信功能;FPGA完成三相锁相环控制、AD芯片采样控制、SVPWM波形控制、逻辑输出控制以及各类故障信号检测与停机保护功能,并采用了基于WIFI模块的风电故障信息传输系统。以双馈风电变流器为模型,设计了双馈风力发电变流器系统,完成了两电平与三电平SVPWM控制算法的FPGA实现。最后在自主研发的1.5 MW,2 MW双馈式变流器样机与光伏逆变器样机上进行了大量实验和长期的现场试运行,验证了控制系统平台的可行性与实用性。 | 郭巍 肖遥 孙永佳 | 2014 | 电气传动2014，44，2： | 14 |
| 17 | Digital image scrambling显示文摘The purpose of digital image scrambling is to transforn a given digital image into a rather scrambled one so as to make it difficult for other people to find out the true meaning of the scrambled image. This paper comes up with a certain number of approaches to scrambling digital images, which, when thus processed, cannot be reconstructed in a common way. As a result, the original image is enc yrypted and protected. | 丁玮 闫伟齐 齐东旭 | 2001 | Progress in Natural Science:Materials International2001，11，6： | 13 |
| 18 | Specimen aspect ratio and progressive field strain development of sandstone under uniaxial compression by three-dimensional digital image correlation显示文摘The complete stress-strain characteristics of sandstone specimens were investigated in a series of quasistatic monotonic uniaxial compression tests.Strain patterns development during pre-and post-peak behaviours in specimens with different aspect ratios was also examined.Peak stress,post-peak portion of stress-strain,brittleness,characteristics of progressive localisation and field strain patterns development were affected at different extents by specimen aspect ratio.Strain patterns of the rocks were obtained by applying three-dimensional(3D) digital image correlation(DIC) technique.Unlike conventional strain measurement using strain gauges attached to specimen,3D DIC allowed not only measuring large strains,but more importantly,mapping the development of field strain throughout the compression test,i.e.in pre-and post-peak regimes.Field strain development in the surface of rock specimen suggests that strain starts localising progressively and develops at a lower rate in pre-peak regime.However,in post-peak regime,strains increase at different rates as local deformations take place at different extents in the vicinity and outside the localised zone.The extent of localised strains together with the rate of strain localisation is associated with the increase in rate of strength degradation.Strain localisation and local inelastic unloading outside the localised zone both feature post-peak regime. | H. Munoz A. Taheri | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，4： | 13 |
| 19 | Uniaxial experimental study of the acoustic emission and deformation behavior of composite rock based on 3D digital image correlation(DIC)显示文摘In this paper, uniaxial compression tests were carried out on a series of composite rock specimens with different dip angles, which were made from two types of rock-like material with different strength. The acoustic emission technique was used to monitor the acoustic signal characteristics of composite rock specimens during the entire loading process. At the same time, an optical non-contact 3 D digital image correlation technique was used to study the evolution of axial strain field and the maximal strain field before and after the peak strength at different stress levels during the loading process. The effect of bedding plane inclination on the deformation and strength during uniaxial loading was analyzed. The methods of solving the elastic constants of hard and weak rock were described. The damage evolution process, deformation and failure mechanism, and failure mode during uniaxial loading were fully determined. The experimental results show that the θ = 0?–45?specimens had obvious plastic deformation during loading, and the brittleness of the θ = 60?–90?specimens gradually increased during the loading process. When the anisotropic angle θincreased from 0?to 90?, the peak strength, peak strain,and apparent elastic modulus all decreased initially and then increased. The failure mode of the composite rock specimen during uniaxial loading can be divided into three categories:tensile fracture across the discontinuities(θ = 0?–30?), slid-ing failure along the discontinuities(θ = 45?–75?), and tensile-split along the discontinuities(θ = 90?). The axial strain of the weak and hard rock layers in the composite rock specimen during the loading process was significantly different from that of the θ = 0?–45?specimens and was almost the same as that of the θ = 60?–90?specimens. As for the strain localization highlighted in the maximum principal strain field, the θ = 0?–30?specimens appeared in the rock matrix approximately parallel to the loading direction,while in the θ = 45?–90?specimens it appeared at the hard and weak rock layer interface. | Jian-Long Cheng Sheng-Qi Yang Kui Chen Dan Ma Feng-Yuan Li Li-Ming Wang | 2017 | Acta Mechanica Sinica2017，33，6： | 13 |
| 20 | 风沙两相流PIV测量算法研究显示文摘在风沙两相流图像特征的基础上,提出了一种基于模式识别动态聚类方法中K-均值算法的数字面具 (Digital Mask)自动生成算法来求解风沙两相流动.简化了传统生成Digital Mask过程中手动设置参数的操作,减少了人为误差,为批量处理风沙两相流PIV图像提供了一种安全快捷的方法.并将该算法应用于风沙两相流的PIV实际测量,分别得到了不同流动状态下的气流、沙粒以及风沙气固两相流的速度场. | 王大伟 王元 杨斌 | 2006 | 力学学报2006，38，3： | 12 |
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