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| 1 | Stepwise-Nanocavity-Assisted Transmissive Color Filter Array Microprints显示文摘Visible-light color flters using patterned nanostructures have attracted much interest due to their various advantages such as compactness,enhanced stability,and environmental friendliness compared with traditional pigment or dye-based optical flters.While most existing studies are based on planar nanostructures with lateral variation in size,shape,and arrangement,the vertical dimension of structures is a long-ignored degree of freedom for the structural colors.Herein,we demonstrate a synthetic platform for transmissive color flter array by coordinated manipulations between height-varying nanocavities and their lateral flling fractions.Te thickness variation of those nanocavities has been fully deployed as an alternative degree of freedom,yielding vivid colors with wide gamut and excellent saturation.Experimental results show that the color-rendering capability of the pixelated nanocavities can be still retained as pixels are miniaturized to 500 nm.Crosstalk between closely spaced pixels of a Bayer color flter arrangement was calculated,showing minimal crosstalk for 1μm2 square subpixels.Our work provides an approach to designing and fabricating ultracompact color flter arrays for various potential applications including stained-glass microprints,microspectrometers,and high-resolution image sensing systems. | Yasi Wang Mengjie Zheng Qifeng Ruan Yanming Zhou Yiqin Chen Peng Dai Zhengmei Yang Zihao Lin Yuxiang Long Ying Li Na Liu Cheng-Wei Qiu Joel K.W.Yang Huigao Duan | 2018 | Research2018，，1： | 8 |
| 2 | Digital synthesis of histological stains using micro-structured and multiplexed virtual staining of label-free tissue显示文摘Histological staining is a vital step in diagnosing various diseases and has been used for more than a century to provide contrast in tissue sections,rendering the tissue constituents visible for microscopic analysis by medical experts.However,this process is time consuming,labour intensive,expensive and destructive to the specimen.Recently,the ability to virtually stain unlabelled tissue sections,entirely avoiding the histochemical staining step,has been demonstrated using tissue-stain-specific deep neural networks.Here,we present a new deep-learning-based framework that generates virtually stained images using label-free tissue images,in which different stains are merged following a micro-structure map defined by the user.This approach uses a single deep neural network that receives two different sources of information as its input:(1)autofluorescence images of the label-free tissue sample and(2)a“digital staining matrix”,which represents the desired microscopic map of the different stains to be virtually generated in the same tissue section.This digital staining matrix is also used to virtually blend existing stains,digitally synthesizing new histological stains.We trained and blindly tested this virtual-staining network using unlabelled kidney tissue sections to generate micro-structured combinations of haematoxylin and eosin(H&E),Jones’silver stain,and Masson’s trichrome stain.Using a single network,this approach multiplexes the virtual staining of label-free tissue images with multiple types of stains and paves the way for synthesizing new digital histological stains that can be created in the same tissue cross section,which is currently not feasible with standard histochemical staining methods. | Yijie Zhang Kevin de Haan Yair Rivenson Jingxi Li Apostolos Delis Aydogan Ozcan | 2020 | Light(Science & Applications)2020，9，1： | 7 |
| 3 | Deep residual learning for denoising Monte Carlo renderings显示文摘Learning-based techniques have recently been shown to be effective for denoising Monte Carlo rendering methods. However, there remains a quality gap to state-of-the-art handcrafted denoisers. In this paper, we propose a deep residual learning based method that outperforms both state-of-the-art handcrafted denoisers and learning-based denoisers.Unlike the indirect nature of existing learning-based methods(which e.g., estimate the parameters and kernel weights of an explicit feature based filter), we directly map the noisy input pixels to the smoothed output. Using this direct mapping formulation, we demonstrate that even a simple-and-standard ResNet and three common auxiliary features(depth, normal,and albedo) are sufficient to achieve high-quality denoising. This minimal requirement on auxiliary data simplifies both training and integration of our method into most production rendering pipelines. We have evaluated our method on unseen images created by a different renderer. Consistently superior quality denoising is obtained in all cases. | Kin-Ming Wong Tien-Tsin Wong | 2019 | Computational Visual Media2019，5，3： | 6 |
| 4 | New red phosphors enable white LEDs to show both high luminous efficacy and color rendering index显示文摘Today, energy saving and emission reduction are two big global issues. Power artificial lighting currently accounts for about 20% of the total global electricity consumption [1]. Solid-state lighting based on light-emitting diodes (LEDs) is bringing about a revolution in energy-efficient lighting, and the lighting industry is transformed into a rapidly growing business sector [2,3]. The solid-state lighting technology is basically based on phosphor- converted white LEDs (pc-LEDs), which are commonly fabricated by using the combination of InGaN blue-emitting LED chips and luminescent materials as color converters [4,5], Luminescent materials play a critical role in fabricating high-performance LED devices, which is strongly linked to LED's luminous efficacy, stability, color rendering index (CRI), correlated color temperature (CCT) and operation lifetime [6-8]. Therefore, the discovery of more efficient desirable phosphor materials is essential. | Xiaoyong Huang | 2019 | Science Bulletin2019，64，13： | 6 |
| 5 | A survey on deep learning-based Monte Carlo denoising显示文摘Monte Carlo(MC)integration is used ubiquitously in realistic image synthesis because of its flexibility and generality.However,the integration has to balance estimator bias and variance,which causes visually distracting noise with low sample counts.Existing solutions fall into two categories,in-process sampling schemes and post-processing reconstruction schemes.This report summarizes recent trends in the post-processing reconstruction scheme.Recent years have seen increasing attention and significant progress in denoising MC rendering with deep learning,by training neural networks to reconstruct denoised rendering results from sparse MC samples.Many of these techniques show promising results in real-world applications,and this report aims to provide an assessment of these approaches for practitioners and researchers. | Yuchi Huo Sung-eui Yoon | 2021 | Computational Visual Media2021，7，2： | 5 |
| 6 | Haptic based teleoperation with master-slave motion mapping and haptic rendering for space exploration显示文摘This paper presents a new solution to haptic based teleoperation to control a large-sized slave robot for space exploration, which includes two specially designed haptic joysticks, a hybrid master-slave motion mapping method, and a haptic feedback model rendering the operating resistance and the interactive feedback on the slave side. Two devices using the 3 R and DELTA mechanisms respectively are developed to be manipulated to control the position and orientation of a large-sized slave robot by using both of a user's two hands respectively. The hybrid motion mapping method combines rate control and variable scaled position mapping to realize accurate and efficient master-slave control. Haptic feedback for these two mapping modes is designed with emphasis on ergonomics to improve the immersion of haptic based teleoperation. A stiffness estimation method is used to calculate the contact stiffness on the slave side and play the contact force rendered by using a traditional spring-damping model to a user on the master side stably. Experiments by using virtual environments to simulate the slave side are conducted to validate the effectiveness and efficiency of the proposed solution. | Guanyang LIU Xuda GENG Lingzhi LIU Yan WANG | 2019 | Chinese Journal of Aeronautics2019，32，3： | 5 |
| 7 | Transmission-reflection optoacoustic ultrasound(TROPUS)computed tomography of small animals显示文摘Rapid progress in the development of multispectral optoacoustic tomography techniques has enabled unprecedented insights into biological dynamics and molecular processes in vivo and noninvasively at penetration and spatiotemporal scales not covered by modern optical microscopy methods.Ultrasound imaging provides highly complementary information on elastic and functional tissue properties and further aids in enhancing optoacoustic image quality.We devised the first hybrid transmission–reflection optoacoustic ultrasound(TROPUS)small animal imaging platform that combines optoacoustic tomography with both reflection-and transmission-mode ultrasound computed tomography.The system features full-view cross-sectional tomographic imaging geometry for concomitant noninvasive mapping of the absorbed optical energy,acoustic reflectivity,speed of sound,and acoustic attenuation in whole live mice with submillimeter resolution and unrivaled image quality.Graphics-processing unit(GPU)-based algorithms employing spatial compounding and bent-ray-tracing iterative reconstruction were further developed to attain real-time rendering of ultrasound tomography images in the full-ring acquisition geometry.In vivo mouse imaging experiments revealed fine details on the organ parenchyma,vascularization,tissue reflectivity,density,and stiffness.We further used the speed of sound maps retrieved by the transmission ultrasound tomography to improve optoacoustic reconstructions via two-compartment modeling.The newly developed synergistic multimodal combination offers unmatched capabilities for imaging multiple tissue properties and biomarkers with high resolution,penetration,and contrast. | Elena Mercep Joaquin LHerraiz Xose Luis Dean-Ben Daniel Razansky | 2019 | Light(Science & Applications)2019，8，1： | 4 |
| 8 | Expanding the scope of genome editing with SpG and SpRY variants in rice显示文摘Dear Editor,The clustered regularly interspaced short palindromic repeats/CRISPR-associated nuclease 9(CRISPR/Cas9)system,since it was excavated,has been rapidly developed and sparked a revolution in the genome editing field.In principle,CRISPR/Cas9 system relies on the recognition of specific loci on the genome,which is titled the protospacer adjacent motif(PAM).However,the canonical Streptococcus pyogenes Cas9(SpCas9)nuclease only recognizes NGG or NAG PAMs,rendering an inherent obstacle in amplifying the application of CRISPR/Cas9 technology. | Jun Ren Xiangbing Meng Fengyue Hu Qing Liu Yuexuan Cao Huiying Li Changjie Yan Jiayang Li Kejian Wang Hong Yu Chun Wang | 2021 | Science China(Life Sciences)2021，64，10： | 4 |
| 9 | Phosphor-free single chip GaN-based white light emitting diodes with a moderate color rendering index and significantly enhanced communications bandwidth显示文摘To achieve high quality lighting and visible light communication(VLC)simultaneously,Ga N based white light emitting diodes(WLEDs)oriented for lighting in VLC has attracted great interest.However,the overall bandwidth of conventional phosphor converted WLEDs is limited by the long lifetime of phosphor,the slow Stokes transfer process,the resistance-capacitance(RC)time delay,and the quantum-confined Stark effect(QCSE).Here by adopting a self-assembled In Ga N quantum dots(QDs)structure,we have fabricated phosphor-free single chip WLEDs with tunable correlated color temperature(CCT,from 1600 K to 6000 K),a broadband spectrum,a moderate color rendering index(CRI)of 75,and a significantly improved modulation bandwidth(maximum of150 MHz)at a low current density of 72 A∕cm^2.The broadband spectrum and high modulation bandwidth are ascribed to the capture of carriers by different localized states of In Ga N QDs with alleviative QCSE as compared to the traditional In Ga N/Ga N quantum well(QW)structures.We believe the approach reported in this work will find its potential application in Ga N WLEDs and advance the development of semiconductor lighting-communication integration. | Rongqiao Wan Xiang Gao Liancheng Wang Shuo Zhang Xiongbin Chen Zhiqiang Liu Xiaoyan Yi Junxi Wang Junhui Li Wenhui Zhu Jinmin Li | 2020 | Photonics Research2020，8，7： | 3 |
| 10 | “Hot”electrons in metallic nanostructures—nonthermal carriers or heating?显示文摘Understanding the interplay between illumination and the electron distribution in metallic nanostructures is a crucial step towards developing applications such as plasmonic photocatalysis for green fuels,nanoscale photodetection and more.Elucidating this interplay is challenging,as it requires taking into account all channels of energy flow in the electronic system.Here,we develop such a theory,which is based on a coupled Boltzmann-heat equations and requires only energy conservation and basic thermodynamics,where the electron distribution,and the electron and phonon(lattice)temperatures are determined uniquely.Applying this theory to realistic illuminated nanoparticle systems,we find that the electron and phonon temperatures are similar,thus justifying the(classical)singletemperature models.We show that while the fraction of high-energy“hot”carriers compared to thermalized carriers grows substantially with illumination intensity,it remains extremely small(on the order of 10^(-8)).Importantly,most of the absorbed illumination power goes into heating rather than generating hot carriers,thus rendering plasmonic hot carrier generation extremely inefficient.Our formulation allows for the first time a unique quantitative comparison of theory and measurements of steady-state electron distributions in metallic nanostructures. | Yonatan Dubi Yonatan Sivan | 2019 | Light(Science & Applications)2019，8，1： | 3 |
| 11 | Interactively Inspection Layers of CT Datasets on CUDA-Based Volume Rendering显示文摘With the fast growing size and dimensionality of scientific datasets, inspection and rendering data features has become an important topic when traversing through it. We propose opacity transfer function with trapezoid shape having an overlapping region to extract different layers when using Compute unified device architecture(CUDA)-based volume ray-casting. We define different tools such as probe for 3D inspection and virtual lenses for 2D inspection of inner layers in Region-ofinterest(ROI). We verify the effectiveness which allowing inspection of structures both interior layers in ROI and exterior semi-transparent ones at interactive frame rates. | LUO Yanhong TIAN Jun LUO Yanlin | 2015 | Chinese Journal of Electronics2015，24，2： | 2 |
| 12 | Large-Scale Terrain Simplification and Visualization Based on TIN显示文摘In the preprocessing phase, the global terrain model is partitioned into blocks with their feature points being picked out to generate TIN model for each terrain block, then the multi-resolution models of terrain organized in the form of quad-tree is created bottom-up. Cracks between terrain blocks are avoided by inserting vertices to form common boundaries. At run-time, a view-dependent LOD algorithm is used to control the loading and unloading of the proper blocks by an additional synchronous thread. To eliminate the artifacts created by LOD transitions, geomorphing is used in real-time. These rendering strategies increase the throughput of GPU and avoid imbalance of load among CPU, GPU and Disk I/O. Experimental results show that the system can perform visually smooth rendering of large-scale terrain scenes with fine quality at an average rate of 80 fps. | KANG Lai, WU Ling-da, YANG Bing, SONG Han-chen (College of Information Systems & Management, National University of Defense Technology, Changsha 410073, China) | 2008 | Computer Aided Drafting,Design and Manufacturing2008，18，2： | 2 |
| 13 | Online volume rendering of incrementally accumulated LSCEM images for superficial oral cancer detection显示文摘Laser scanning confocal endomicroscope(LSCEM)has emerged as an imaging modality which provides noninvasive,in vivo imaging of biological tissue on a microscopic scale.Scientific visualizations for LSCEM datasets captured by current imaging systems require these datasets to be fully acquired and brought to a separate rendering machine.To extend the features and capabilities of this modality,we propose a system which is capable of performing realtime visualization of LSCEM datasets.Using field-programmable gate arrays,our system performs three tasks in parallel:(1)automated control of dataset acquisition;(2)imaging-rendering system synchronization;and(3)realtime volume rendering of dynamic datasets.Through fusion of LSCEM imaging and volume rendering processes,acquired datasets can be visualized in realtime to provide an immediate perception of the image quality and biological conditions of the subject,further assisting in realtime cancer diagnosis.Subsequently,the imaging procedure can be improved for more accurate diagnosis and reduce the need for repeating the process due to unsatisfactory datasets. | Wei Ming Chiew Feng Lin Kemao Qian Hock Soon Seah | 2011 | World Journal of Clinical Oncology2011，2，4： | 2 |
| 14 | Efficient,high-CRI white LEDs by combining traditional phosphors with cadmium-free InP/ZnSe red quantum dots显示文摘Quantum dots(QDs) offer an interesting alternative for traditional phosphors in on-chip light-emitting diode(LED) configurations.Earlier studies showed that the spectral efficiency of white LEDs with high color rendering index(CRI) values could be considerably improved by replacing red-emitting nitride phosphors with narrowband QDs.However,the red QDs in these studies were cadmium-based,which is a restricted element in the EU and certain other countries.The use of InP-based QDs,the most promising Cd-free alternative,is often presented as an inferior solution because of the broader linewidth of these QDs.However,while narrow emission lines are the key to display applications that require a large color gamut,the spectral efficiency penalty of this broader emission is limited for lighting applications.Here,we report efficient,high-CRI white LEDs with an on-chip color converter coating based on red InP/ZnSe QDs and traditional green/yellow powder phosphors.Using InP/ZnSe QDs with a quantum yield of nearly 80% and a full width at half-maximum of 45 nm,we demonstrate high spectral efficiency for white LEDs with very high CRI values.One of the best experimental results in terms of both luminous efficacy and color rendering performance is a white LED with an efficacy of 132 lm/W,and color rendering indices of R_(a)≈90,R9 ≈50 for CCT ≈4000 K.These experimental results are critically compared with theoretical benchmark values for white LEDs with on-chip downconversion from both phosphors and red Cd-based QDs.The various loss mechanisms in the investigated white LEDs are quantified with an accurate simulation model,and the main impediments to an even higher efficacy are identified as the blue LED wall-plug Quantum dots(QDs) offer an interesting alternative for traditional phosphors in on-chip light-emitting diode(LED) configurations.Earlier studies showed that the spectral efficiency of white LEDs with high color rendering index(CRI) values could be considerably improved by replacing red-emitting nitride phosphors with narrowband QDs.However,the red QDs in these studies were cadmium-based,which is a restricted element in the EU and certain other countries.The use of In P-based QDs,the most promising Cd-free alternative,is often presented as an inferior solution because of the broader linewidth of these QDs.However,while narrow emission lines are the key to display applications that require a large color gamut,the spectral efficiency penalty of this broader emission is limited for lighting applications.Here,we report efficient,high-CRI white LEDs with an on-chip color converter coating based on red In P/Zn Se QDs and traditional green/yellow powder phosphors.Using In P/Zn Se QDs with a quantum yield of nearly 80% and a full width at half-maximum of 45 nm,we demonstrate high spectral efficiency for white LEDs with very high CRI values.One of the best experimental results in terms of both luminous efficacy and color rendering performance is a white LED with an efficacy of 132 lm/W,and color rendering indices of Ra≈ 90,R9 ≈ 50 for CCT ≈ 4000 K.These experimental results are critically compared with theoretical benchmark values for white LEDs with on-chip downconversion from both phosphors and red Cd-based QDs.The various loss mechanisms in the investigated white LEDs are quantified with an accurate simulation model,and the main impediments to an even higher efficacy are identified as the blue LED wall-plug efficiency and light recycling in the LED package. | BEGA KARADZA HANNES VAN AVERMAET LEILA MINGABUDINOVA ZEGER HENS YOURI MEURET | 2022 | Photonics Research2022，10，1： | 2 |
| 15 | Synthesis and Properties of CF3(OCF3)CH-Substituted Arenes and Alkenes显示文摘A silver-mediated oxidative trifluoromethylation of easily accessibleαα-trifluoromethyl alcohols with TMSCF3 was developed to access novel CF3(OCF3)CH-containing compounds.Deprotonation of CF3(OCF3)CH-substituted arenes afforded synthetically useful CF3O-substituted gem-difluoroalkenes.Furthermore,evaluation of the lipophilicities(log P)indicated that CH(OCF3)CF3 is more lipophilic than the common fluorinated motifs such as CF3,OCF3,and SCF3,thus rendering the CH(OCF3)CF3 motif appealing in drug discovery. | Wen-Qi Xu Xiu-Hua Xu Feng-Ling Qing | 2020 | Chinese Journal of Chemistry2020，38，8： | 2 |
| 16 | DEMC: A Deep Dual-Encoder Network for Denoising Monte Carlo Rendering显示文摘In this paper, we present DEMC, a deep dual-encoder network to remove Monte Carlo noise efficiently while preserving details. Denoising Monte Carlo rendering is different from natural image denoising since inexpensive by-products (feature buffers) can be extracted in the rendering stage. Most of them are noise-free and can provide sufficient details for image reconstruction. However, these feature buffers also contain redundant information. Hence, the main challenge of this topic is how to extract useful information and reconstruct clean images. To address this problem, we propose a novel network structure, dual-encoder network with a feature fusion sub-network, to fuse feature buffers firstly, then encode the fused feature buffers and a noisy image simultaneously, and finally reconstruct a clean image by a decoder network. Compared with the state-of-the-art methods, our model is more robust on a wide range of scenes, and is able to generate satisfactory results in a significantly faster way. | Xin Yang Dawei Wang Wenbo Hu Li-Jing Zhao Bao-Cai Yin Qiang Zhang Xiao-Peng Wei Hongbo Fu | 2019 | Journal of Computer Science & Technology2019，34，5： | 1 |
| 17 | Hierarchical surface fragments显示文摘A new compact level-of-detail representation, called hierarchical surface fragments, for geometric objects with highly complex shape is presented. The representation comprises a set of irregular unstructured sampled surface fragments, whose boundary is a circle viewed along its normal. An efficient algorithm to construct the representation is described. In depiction of the framework for visualization, a screen tile technique for acceleration of rendering is proposed. Since an approximate z-buffer algorithm is adopted to fast determine visibility of each rendering primitive, a new buffer, z-delta-buffer, is designed to facilitate solving the problems raised by the approximation and to improve the image fidelity. Finally, a solution is provided to integrate our rendering approach for hierarchical surface fragments with traditional polygon-based methods. | HUA Wei , BAO Hujun and PENG Qunsheng(State Key Laboratory of CAD & CG, Zhejiang University, Hangzhou 310027, China) | 2002 | Progress in Natural Science:Materials International2002，12，9： | 1 |
| 18 | Method of GIL partial discharge localization based on natural neighbour interpolation and ECOC‐MLP‐SVM using optical simulation technology显示文摘Partial discharge(PD)is one of the main causes rendering the deterioration of the insulation state in gas‐insulated transmission line(GIL).Accurate and timely localization of the PD source is essential to ensure the safe and stable operation of the GIL.At present,optical PD detection technology shows advantages in terms of high sensitivity and strong anti‐inter-ference performance.Therefore,an optical PD localization method based on optical simulation fingerprint database is proposed.The introduction of simulation conquers the difficulty of obtaining a PD fingerprint database in field experiments.This method con-structs a simulation fingerprint database by performing PD simulation in a GIL simulation model of the same size as the actual GIL.The natural neighbour interpolation algorithm is applied to expand the simulation fingerprint database to cover all locations in the GIL.The two‐level localization method proposed is to match the PD fingerprint to be tested with the expanded fingerprint database,which can reduce the amount of calculation while main-taining the localization accuracy.The experimental results show that the average localiza-tion error of this method is only 9.7 mm,and the localization time is reduced by about 11 times compared with the normal one‐level localization method. | Yiming Zang Yong Qian Hui Wang Antian Xu Gehao Sheng Xiuchen Jiang | 2021 | High Voltage2021，6，3： | 1 |
| 19 | 蒂姆·布朗:拥抱未知显示文摘问:(在1983年您关于设计的第一篇文章中)您写道:'对于某种技能高度熟练的掌握,如渲染或者模型制作,会让创作者被平庸的解决方案所蛊惑。'我感觉这是您在《设计改变一切》这本书中想要表达的关键问题,对吗?So,you wrote,'A great proficiency in a certain skill,such as rendering or model-making,has allowed a mediocre solution to seduce those for whom it was produced'.Which I feel like is actually central to your book,'Change by Design',right? | Courtney E.Martin(采访) 王曦(译) | 2022 | 设计艺术研究2022，12，2： | 1 |
| 20 | How can the Dual-atom Catalyst FeCo-NC Surpass Singleatom Catalysts Fe-NC/Co-NC in CO_(2) RR?-CO Intermediate Assisted Promotion via a Synergistic Effect显示文摘Atomically dispersed catalysts are widely adopted in CO_(2)reduction reaction(CO_(2)RR)due to maximal atomic utilization and high catalytic activity.Dual-atom catalysts(DACs),with more dispersed active sites and distinct electronic structures compared with single-atom catalysts(SACs),may exhibit diverse catalytic performance.Herein,the DAC FeCo-NC and SAC Fe-NC/Co-NC are employed as probes to explore DACs advantage in CO_(2)RR.Results show that the moderate interaction between the dual-atom center and N coordination balances structural stability and catalytic activity.CO is the only product on Fe-NC/Co-NC,and the high limiting potentials from−1.22 to−1.67 V inhibit further reduction.FeCo-NC assisted with CO intermediate exhibits low limiting potentials of−0.64 V for both CH_(3)OH and CH 4,comparable to those on Cu-based catalysts.Under circumstance of applied potentials,CO_(2)RR on FeCo-NC has greater advantages in yielding CH_(3)OH and CH 4 than that on Fe-NC/Co-NC,and hydrogen evolution reaction is severely inhibited.The intrinsic essence is that dual-atom center can provide large spin-polarization and multi-electron transfer capability,rendering CO intermediates as effective electronic and geometric modifiers in CO_(2)RR.This work highlights FeCo-NC as a high-performance CO_(2)RR catalyst toward deep-reduction C1 products and elucidates CO intermediate assisted promotion mechanism via a dual-atom synergistic effect. | Shoufu Cao Sainan Zhou Hongyu Chen Shuxian Wei Siyuan Liu Xiaojing Lin Xiaodong Chen Zhaojie Wang Wenyue Guo Xiaoqing Lu | 2023 | Energy & Environmental Materials2023，6，1： | 1 |
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