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| 1 | Direct observation of ultrafast plasmonic hot electron transfer in the strong coupling regime显示文摘Achieving strong coupling between plasmonic oscillators can significantly modulate their intrinsic optical properties.Here,we report the direct observation of ultrafast plasmonic hot electron transfer from an Au grating array to an MoS_(2) monolayer in the strong coupling regime between localized surface plasmons(LSPs)and surface plasmon polaritons(SPPs).By means of femtosecond pump-probe spectroscopy,the measured hot electron transfer time is approximately 40 fs with a maximum external quantum yield of 1.65%.Our results suggest that strong coupling between LSPs and SPPs has synergetic effects on the generation of plasmonic hot carriers,where SPPs with a unique nonradiative feature can act as an‘energy recycle bin’to reuse the radiative energy of LSPs and contribute to hot carrier generation.Coherent energy exchange between plasmonic modes in the strong coupling regime can further enhance the vertical electric field and promote the transfer of hot electrons between the Au grating and the MoS_(2) monolayer.Our proposed plasmonic strong coupling configuration overcomes the challenge associated with utilizing hot carriers and is instructive in terms of improving the performance of plasmonic opto-electronic devices. | Hangyong Shan Ying Yu Xingli Wang Yang Luo Shuai Zu Bowen Du Tianyang Han Bowen Li Yu Li Jiarui Wu Feng Lin Kebin Shi Beng Kang Tay Zheng Liu Xing Zhu Zheyu Fang | 2019 | Light(Science & Applications)2019，8，1： | 7 |
| 2 | Plasmonic tip internally excited via an azimuthal vector beam for surface enhanced Raman spectroscopy显示文摘The synergy of a plasmonic tip and fiber-based structure light field excitation can provide a powerful tool for Raman examination. Here, we present a method of Raman spectrum enhancement with an Ag-nanoparticles(Ag-NPs)-coated fiber probe internally excited via an azimuthal vector beam(AVB), which is directly generated in a few-mode fiber by using an acoustically induced fiber grating. Theoretical analysis shows that gap mode can be effectively generated on the surface of the Ag-NPs-coated fiber probe excited via an AVB. The experimental result shows that the intensity of Raman signal obtained with analyte molecules of malachite green by exciting the Ag-NPs-coated fiber probe via an AVB is approximately eight times as strong as that via the linear polarization beam(LPB), and the activity of the AVB-excited fiber probe can reach 10^-11 mol∕L, which cannot be achieved by LPB excitation.Moreover, the time stability and reliability are also examined, respectively. | Min Liu Wending Zhang Fan fan Lu Tianyang Xue Xin Li Lu Zhang Dong Mao Ligang Huang Feng Gao Ting Mei Jianlin Zhao | 2019 | Photonics Research2019，7，5： | 3 |
| 3 | Application of Neural Network in Fault Location of Optical Transport Network显示文摘Due to the increasing variety of information and services carried by optical networks, the survivability of network becomes an important problem in current research. The fault location of OTN is of great significance for studying the survivability of optical networks. Firstly, a three-channel network model is established and analyzing common alarm data, the fault monitoring points and common fault points are carried out. The artificial neural network is introduced into the fault location field of OTN and it is used to judge whether the possible fault point exists or not. But one of the obvious limitations of general neural networks is that they receive a fixedsize vector as input and produce a fixed-size vector as the output. Not only that, these models is even fixed for mapping operations (for example, the number of layers in the model). The difference between the recurrent neural network and general neural networks is that it can operate on the sequence. In spite of the fact that the gradient disappears and the gradient explodes still exist in the neural network, the method of gradient shearing or weight regularization is adopted to solve this problem, and choose the LSTM (long-short term memory networks) to locate the fault. The output uses the concept of membership degree of fuzzy theory to express the possible fault point with the probability from 0 to 1. Priority is given to the treatment of fault points with high probability. The concept of F-Measure is also introduced, and the positioning effect is measured by using location time, MSE and F-Measure. The experiment shows that both LSTM and BP neural network can locate the fault of optical transport network well, but the overall effect of LSTM is better. The localization time of LSTM is shorter than that of BP neural network, and the F1-score of LSTM can reach 0.961566888396156 after 45 iterations, which meets the accuracy and real-time requirements of fault location. Therefore, it has good application prospect and practical value to introduce neural network into the fault location field of optical transport network. | Tianyang Liu Haoyuan Mei Qiang Sun Huachun Zhou | 2019 | China Communications2019，16，10： | 3 |
| 4 | Azimuthal vector beam exciting silver triangular nanoprisms for increasing the performance of surface-enhanced Raman spectroscopy显示文摘Surface-enhanced Raman spectroscopy(SERS)with high-sensitivity performance is a very necessary detection technology.Here,we present a method for increasing the performance of SERS based on silver triangular nanoprism arrays(ATNAs)vertically excited via a focused azimuthal vector beam(AVB).The ATNA substrates with different structural parameters are prepared based on the traditional self-assembled and modified film lift-off technique.Based on a theoretical model established adopting the structural parameters of the ATNA substrates,theoretical simulation results show that AVB excitation can achieve greater electric-field enhancement than linearly polarized beam(LPB)excitation.Experimental result indicates that SERS sensitivity obtained via AVB excitation is 10^-13M(1 M=1 mol/L)using rhodamine 6 G(R6 G)as the target analyte,which is 2 orders of magnitude lower than that of LPB excitation(10^-11M).Meanwhile,the uniformity and reproducibility of the ATNA substrates are examined using Raman mapping and batch-to-batch measurement,respectively,and the Raman enhancement factor is calculated to be^3.3×10^7.This method of vector light field excitation may be used to improve the SERS performance of the substrates in fields of ultra-sensitive Raman detection. | LU ZHANG WENDING ZHANG FANFAN LU ZHIQIANG YANG TIANYANG XUE MIN LIU CHAO MENG PENG LI DONG MAO TING MEI JIANLIN ZHAO | 2019 | Photonics Research2019，7，12： | 3 |
| 5 | Scaled-up synthesis of defect-rich layered double hydroxide monolayers without organic species for efficient oxygen evolution reaction显示文摘The scaled-up synthesis of organic-free monolayer nanomaterials is highly desirable,especially in obtaining green energy by electrocatalysis.In this study,a method for the scaled-up synthesis of the series of monolayer layered double hydroxides(LDHs)without the addition of organic solvents is reported via the separate nucleation and aging steps process.The resulting monolayer LDHs with the thicknesses of less than 1 nm showed a narrow thickness distribution.X-ray absorption fine-structure revealed that monolayer NiFe-LDH nanosheets have a number of oxygen and metal vacancies defects.As a practical application,monolayer NiFe-LDH nanosheets containing defects showed an enhanced electrocatalytic water oxidation activity compared with that of bulk NiFe-LDH.Density functional theory calculations uncovered that excellent catalytic activity is attributed to vacancies defects.The proposed method is an economical and universally applicable strategy for the scaled-up production of monolayer LDHs. | Haoyuan Chi Jingwen Dong Tian Li Sha Bai Ling Tan Jikang Wang Tianyang Shen Guihao Liu Lihong Liu Luyi Sun Yufei Zhao Yu-Fei Song | 2022 | Green Energy & Environment2022，7，5： | 2 |
| 6 | Enhanced Hole-Injection Property in an OLED with a Self-assembled Monolayer of Hole-Transporting TPD on Thin Au as the Anode显示文摘A thioester-functionalized triphenylamine hole-transporting molecule(TPD-SAc) was synthesized and self-assembled to form a monolayer on an ultra-thin Au film supported on indium-tin oxide glass. The modified surface was characterized by aqueous contact angle, ellipsometer, atomic force microscopy, X-ray photoelectron spectroscopy, and ultraviolet photoelectron spectrometer to substantiate the formation of compact and pinhole-free monolayers. The modified organic light emitting diode device [indium-tin oxide/Au(5 nm)/self-assembled monolayers(SAM)/TPD(50 nm)/Alq_3(40 nm)/TPBI(15 nm)/LiF(1 nm)/Al(100 nm)] showed a luminance of 7303.90 cd/m^2 and a current efficiency of 8.49 cd/A with 1.78 and 2.29-fold increase, respectively, compared to the control device without SAM. The improvements were attributed to the enhanced compatibility of the organic–inorganic interface, matched energy level by introduction of an energy mediating step and superior hole-injection property of SAM molecules. | Zhi Shang Dongzhi Liu Tianyang Wang Xi Yu Baili Li Wei Li Wenping Hu Xueqin Zhou | 2018 | Transactions of Tianjin University2018，24，6： | 2 |
| 7 | Geochemical Characteristics and Sedimentary Control of Pinghu Formation(Eocene)Coal-bearing Source Rocks in Xihu Depression,East China Sea Basin显示文摘Coal-bearing source rocks of the Pinghu Formation in the Xihu Depression comprise an important material basis of oil and gas resources in the East China Sea Basin.Based on drilling core observation results combined with the analysis and test results of macerals,trace/rare earth elements,and rock pyrolysis,the geochemical characteristics and sedimentary control of coal-bearing source rocks formation are discussed in a high-frequency sequence framework.The results indicate that the macerals composition of the coal-bearing source rocks of the Eocene Pinghu Formation in the Xihu Depression is dominated by vitrinite,with low-medium abundance of exinite and almost no inertinite.The coals and carbonaceous mudstones display higher amounts of total organic carbon(TOC)(14.90%-65.10%),S1+S2(39.24-136.52 mg/g),and IH(191-310 HC/g TOC)respectively,as compared to the mudstones.Organic matter is plotted in typeⅢkerogens and partially in typeⅡ;it is mainly in the low maturity stage.The trace elements results imply that the samples were deposited in a weakly reducing to weakly oxidizing environment and were occasionally affected by seawater.The coal-bearing source rocks were deposited in a relatively oxygen-containing environment.The coal-bearing source rocks development is jointly controlled by the coal accumulation environment,the water conditions affected by ocean currents in offshore basins in China,oxidation-reduction cycles of aqueous media and paleoclimate evolution in a high-frequency sequence framework. | SHEN Yulin QIN Yong CUI Min XIE Guoliang GUO Yinghai QU Zhenghui YANG Tianyang YANG Liu | 2021 | Acta Geologica Sinica(English Edition)2021，95，1： | 2 |
| 8 | Ambipolar organic semiconductors with cascades of energy levels for generating long-lived charge separated states: a donor- acceptorl -acceptor 2 architectural triarylamine dye 显示文摘 | Wang Tianyang Weerasinghe Krishanthi C Liu Dongzhi | 2014 | Journal of Materials Chemistry C2014，2，： | 1 |
| 9 | Real-time programmable metasurface for terahertz multifunctional wave front engineering显示文摘Terahertz(THz)technologies have become a focus of research in recent years due to their prominent role in envisioned future communication and sensing systems.One of the key challenges facing the field is the need for tools to enable agile engineering of THz wave fronts.Here,we describe a reconfigurable metasurface based on GaN technology with an array-of-subarrays architecture.This subwavelength-spaced array,under the control of a 1-bit digital coding sequence,can switch between an enormous range of possible configurations,providing facile access to nearly arbitrary wave front control for signals near 0.34 THz.We demonstrate wide-angle beam scanning with 1°of angular precision over 70 GHz of bandwidth,as well as the generation of multi-beam and diffuse wave fronts,with a switching speed up to 100 MHz.This device,offering the ability to rapidly reconfigure a propagating wave front for beam-forming or diffusively scattered wide-angle coverage of a scene,will open new realms of possibilities in sensing,imaging,and networking. | Feng Lan Luyang Wang Hongxin Zeng Shixiong Liang Tianyang Song Wenxin Liu Pinaki Mazumder Ziqiang Yang Yaxin Zhang Daniel M.Mittleman | 2023 | Light(Science & Applications)2023，12，9： | 1 |
| 10 | Water-retaining properties of NCZ composite dust suppressant and its wetting ability to hydrophobic coal dust显示文摘Coal dust is a primary threat to underground coal miners.The most common approach to control coal dust is hydraulic methods,such as water spray and coal seam water injection.To improve the dust suppressant efficiency of hydraulic methods,a novel chemical composite dust suppressant,called NCZ,was prepared in this study using calcium chloride(CaCl_(2)),magnesium chloride(MgCl_(2)),and nonionic surfactants using a thermal synthesis method.The water-retaining properties of NCZ powder and its solutions were characterized using the water absorption rate(WAR)and evaporation rate(ER),respectively,and the wetting abilities of the NCZ solutions on coal dust were tested using the initial contact angle(ICA)and sink rate(SR).The results indicate that the NCZ solutions have anti-evaporation effects,and the ER of the solution with a 20.0 wt%NCZ is reduced by 11.7%compared with that of clean water.Furthermore,NCZ solutions have remarkable enhancement effects on the wettability of coal dust.The ICA and SR of clean water and the NCZ solution at 20.0 wt%are 141.9°and 0 mg/s,and 29.3°and 1.46 mg/s,respectively.Finally,quantitative relationships between the solution surface tension and the ICA and IR were established using the least squares method.This study provides a new product for dust suppression in underground mines,which is significant for the optimum applied con-centration of dust suppressant in mining operations. | Jianguo Liu Shu Wang Longzhe Jin Tianyang Wang Zihao Zhou Jingge Xu | 2021 | International Journal of Coal Science & Technology2021，8，2： | 1 |
| 11 | The studies of PLGA nanoparticles loading atorvastatin calcium for oral administration in vitro and in vivo显示文摘A biodegradable poly(lactic-co-glycolic acid) loading atorvastatin calcium(AC) nanoparticles(AC-PLGA-NPs) were prepared by probe ultrasonication and evaporation method aiming at improving the oral bioavailability of AC. The effects of experimental parameters, including stabilizer species, stabilizer concentration and pH of aqueous phase, on particle size were also evaluated. The resultant nanoparticles were in spherical shape with an average diameter of 174.7 nm and a narrow particle size distribution. And the drug loading and encapsulation efficiency were about 8% and 71%, respectively. The particle size and polydispersion were almost unchanged in 10 days. The release curves of AC-PLGA-NPs in vitro displaying sustained release characteristics indicated that its release mechanisms were matrix erosion and diffusion. The pharmacokinetic study in vivo revealed that the Cmax and AUC0-∞ of AC-PLGA-NPs in rats were nearly 3.7-fold and 4.7-fold higher than that of pure atorvastatin calcium suspension. Our results demonstrated that the delivery of AC-PLGANPs could be a promising approach for the oral delivery of AC for enhanced bioavailability. | Zhenbao Li Wenhui Tao Dong Zhang Chunnuan Wu Binbin Song Shang Wang Tianyang Wang Mingming Hu Xiaohong Liu Yongjun Wang Yinghua Sun Jin Sun | 2017 | Asian Journal of Pharmaceutical Sciences2017，12，3： | 1 |
| 12 | Multi-objective Optimal Operation of Centralized Battery Swap Charging System with Photovoltaic显示文摘Electric vehicles(EVs)are widely deployed throughout the world,and photovoltaic(PV)charging stations have emerged for satisfying the charging demands of EV users.This paper proposes a multi-objective optimal operation method for the centralized battery swap charging system(CBSCS),in order to enhance the economic efficiency while reducing its adverse effects on power grid.The proposed method involves a multi-objective optimization scheduling model,which minimizes the total operation cost and smoothes load fluctuations,simultaneously.Afterwards,we modify a recently proposed multi-objective optimization algorithm of non-sorting genetic algorithm III(NSGA-III)for solving this scheduling problem.Finally,simulation studies verify the effectiveness of the proposed multi-objective operation method. | Yuanzheng Li Yihan Cai Tianyang Zhao Yun Liu Jian Wang Lei Wu Yong Zhao | 2022 | Journal of Modern Power Systems and Clean Energy2022，10，1： | 1 |
| 13 | Cloud-based storage and computing for remote sensing big data:a technical review显示文摘The rapid growth of remote sensing big data(RSBD)has attracted considerable attention from both academia and industry.Despite the progress of computer technologies,conventional computing implementations have become technically inefficient for processing RSBD.Cloud computing is effective in activating and mining large-scale heterogeneous data and has been widely applied to RSBD over the past years.This study performs a technical review of cloud-based RSBD storage and computing from an interdisciplinary viewpoint of remote sensing and computer science.First,we elaborate on four critical technical challenges resulting from the scale expansion of RSBD applications,i.e.raster storage,metadata management,data homogeneity,and computing paradigms.Second,we introduce state-of-the-art cloud-based data management technologies for RSBD storage.The unit for manipulating remote sensing data has evolved due to the scale expansion and use of novel technologies,which we name the RSBD data model.Four data models are suggested,i.e.scenes,ARD,data cubes,and composite layers.Third,we summarize recent research on the application of various cloud-based parallel computing technologies to RSBD computing implementations.Finally,we categorize the architectures of mainstream RSBD platforms.This research provides a comprehensive review of the fundamental issues of RSBD for computing experts and remote sensing researchers. | Chen Xu Xiaoping Du Xiangtao Fan Gregory Giuliani Zhongyang Hu Wei Wang Jie Liu Teng Wang Zhenzhen Yan Junjie Zhu Tianyang Jiang Huadong Guo | 2022 | International Journal of Digital Earth2022，15，1： | 0 |
| 14 | Prediction of cognitive scores by joint use of movie-watching fMRI connectivity and eye tracking via Attention-CensNet显示文摘Background:Brain functional connectivity under the naturalistic paradigm has been shown to be better at predicting individual behaviors than other brain states,such as rest and doing tasks.Nevertheless,the state-of-the-art methods have found it difcult to achieve desirable results from movie watching paradigm functional magnetic resonance imaging(mfMRI)-induced brain functional connectivity,especially when there are fewer datasets.Incorporating other physical measurements into the prediction method may enhance accuracy.Eye tracking,becoming popular due to its portability and lower expense,can provide abundant behavioral features related to the output of human's cognition,and thus might supplement the mfMRI in observing participants'subconscious behaviors.However,there are very few studies on how to effectively integrate the multimodal information to strengthen the performance by a unified framework.objective:A fusion approach with mfMRI and eye tracking,based on convolution with edge-node switching in graph neural networks(CensNet),is proposed in this article.Methods:In this graph model,participants are designated as nodes,mfMRI derived functional connectivity as node features,and different eye-tracking features are used to compute similarity between participants to construct heterogeneous graph edges.By taking multiple graphs as different channels,we introduce squeeze-and-excitation attention module to CensNet(A-CensNet)to integrate graph embeddings from multiple channels into one.Results:The proposed model outperforms those using a single modality and single channel,and state-of-the-art methods.Conclusions:The results indicate that brain functional activities and eye behaviors might complement each other in interpreting trait-like phenotypes. | Jiaxing Gao Lin Zhao Tianyang Zhong Changhe Li Zhibin He Yaonei Wei Shu Zhang Lei Guo Tianming Liu Junwei Han Xi Jiang Tuo Zhang | 2023 | Psychoradiology2023，3，1： | 0 |
| 15 | Determination of Total Flavonoids in Acanthopanax senticosus(Rupr. et Maxim.) Harms by Enzymolysis and Its Technological Optimization显示文摘In order to optimize the ultrasonic extraction technique for the total flavonoid of leaf yellows plus, the contents of 21 leaf yellows plus total flavonoid from four regions in Heilongjiang Province were comparatively analyzed. The ultrasonic extraction technology was optimized by Box-Behnken response surface method, and the total flavonoid content of 21 kinds of Acanthopanax senticosus(Rupr. et Maxim.) Harms from different producing areas were analyzed by cluster analysis. The optimal process conditions were determined as ultrasonic time 30 min, solid-liquid ratio 1 : 12 and ultrasonic power 250 W, and the average yield of the total flavonoid was 1.453 mg·g^ (-1). By optimizing the ultrasonic-assisted extraction method, the total flavonoid content from different producing areas was compared in the experiment, which provided certain data support for the optimization of the extraction process in the future and laid a certain theoretical foundation for the quality analysis of Chinese medicinal materials. | Li Xinzhi Wang Yudan Wang Meiliang Liu Tianyang Gao Ruihua Qiu Youwen Zhang Shunjie | 2024 | Journal of Northeast Agricultural University(English Edition)2024，31，1： | 0 |
| 16 | Short-time Fourier Transform Using Odd Symmetric Window Function显示文摘In this paper,a novel time–frequency(TF)analysis method,called the short-time Fourier transform using odd symmetric window function(OSTFT),is proposed using odd symmetric window function to replace the conventional even window function of STFT.Different from conventional STFT acquiring the amplitude maximum at time and frequency centers,OSTFT acquires the minimum amplitude of 0.Hence,OSTFT can obtain a TF representation(TFR)with high TF resolution by utilizing the leaked energy rather than restraining it.It is worth to mention that the proposed OSTFT can vitiate the effect of window size we choose on the TFR obtained.Furthermore,it also has a good performance on signals with complex instantaneous frequencies(IFs),even crossing IFs.Because we just replace the conventional window function of STFT,the time-consuming of the proposed OSTFT is at the same level as the conventional STFT.The effectiveness of proposed OSTFT has been validated on two complex multi-component simulated numerical signals and a signal collected from the brown bat. | Miaofen Li Youmin Liu Shaodan Zhi Tianyang Wang Fulei Chu | 2022 | Journal of Dynamics, Monitoring and Diagnostics2022，1，1： | 0 |
| 17 | Atomic-scale insight into the epitaxial growth mechanism and interfacial coupling of BNT film prepared by hydrothermal synthesis显示文摘Revealing the epitaxial growth mechanism and the interfacial coupling effect between oxide films will help to build a“structure-property”bridge for the design of microelectronic devices.Here,the epitaxial growth mechanism and the interfacial coupling in Bi_(0.5)Na_(0.5)TiO_(3)/SrTiO_(3)(BNT/STO)heterointerfaces are investigated by the aberration-corrected scanning transmission electron microscopy,which is synthesized by a hydrothermal method.The results illustrate that 4 mol/L NaOH leads to not only the epitaxial growth of the BNT film but also the mutual diffusion of elements.The uneven distribution of local elements in BNT films is observed and confirmed to impact the cation displacements of B-site and lattice distortion.However,the overall trend of B-site cation displacement at the BNT/STO heterointerfaces is dominated by the interfacial strain.Additionally,the oxygen octahedral tilt exhibits continuous tilt patterns of a^(0)a^(0)a^(0)-a−b^(0)c−-a^(0)a^(0)c−-a^(0)b−c−-a−b−c−from the substrate to BNT film due to the constraint of the substrate and presents a strong correlation with cation displacement.These results are helpful to understand the underlying atomic structures and physical properties of BNT epitaxial thin films. | Fujun Chen Hao Qian Xiaoyuan Sun Tianyang Zheng Yunfei Liu Jin Luo Yinong Lyu | 2023 | Journal of Materials Science & Technology2023，，33： | 0 |
| 18 | Spatial-temporal Evolution and Its Influencing Factors of Tourism Eco-efficiency in China显示文摘Eco-efficiency is an invaluable indicator for the measurement of the relationship between production activities and environmental depletion.This study measures the tourism eco-efficiency of 30 provinces in China from 2005 to 2020 based on the super-efficiency SBM model,and explores its spatial-temporal evolution characteristics using the kernel density function,standard deviation ellipse,and center of gravity model.Then,the influencing factors of the tourism eco-efficiency in China are analyzed by Tobit regression model.The results show that the tourism eco-efficiency of China is generally fluctuating upwards,but has not yet reached the maximum production possibility frontier.The kernel density curve shows a unimodal-bimodal-unimodal pattern,while the inter-provincial differences have been decreasing and becoming more balanced.The center of gravity of tourism eco-efficiency is located at the junction of Henan and Hubei province and generally moves to the south(slightly to the southwest).Meanwhile,it is revealed that the level of economic development and the tourism eco-efficiency has a significant inverted U-shaped relationship.The level of economic openness,traffic conditions,and tourism eco-efficiency is positively correlated.The environmental regulations and industrial structure have a negative but limited impact on tourism eco-efficiency.Finally,recommendations and suggestions for policy formulation to promote quality and sustainable development of the tourism industry are put forward,such as increasing investment in ecological protection and governance in tourism development,improving capacity-building in allocating green and low-carbon technologies and resources,strengthening tourism infrastructure construction,and enhancing environmental governance systems and mechanisms. | Chengpeng Lu Tianyang Ma Zhiliang Liu | 2022 | Journal of Geographical Research2022，5，3： | 0 |
| 19 | Highly crystalline core dominated the catalytic performance of carbon dot for cyclohexane to adipic acid reaction显示文摘Carbon dots(CDs)have uniquely structural,physicochemical and photochemical properties,suggesting a promising platform for catalysis applications.The in-depth understanding of the structure-activity relationship in the CDs-based catalyst system needs to know the effect of the crystalline core on their catalytic performance.The efficient catalytic oxidation of cyclohexane is an urgent challenge in current chemical industry,in which,adipic acid(AA)plays an important role in industry for synthesis of nylon6 and nylon-66.Here,we fabricated the pristine CDs by electrochemical etching graphite rod method and derived CDs with high crystalline core(CD-600,CD-800,and CD-1100)through a thermal treatment method in tube furnace.Furthermore,these CDs performed an outstanding catalytic performance for one-step synthesis of AA from cyclohexane.With the help of machine learning(ML),the deep correlations between features(structures of CDs,catalytic conditions)and catalytic performances were investigated by XGBoost(XGB)model.Then under the optimization and prediction of XGB,it was found that high crystalline core preceded the other features and CD-1100 could get the best conversion of 30.696%and selectivity to AA of 92.52%at reaction conditions of 130℃,1.5 MPa,and 10 h.This work pioneered the application of ML in industrial issues and demonstrated a comprehensive understanding on CDs as catalyst to realize one-step synthesis of AA. | Xiao Wang Wenyi Bian Tianyang Zhang Yajie Zhao Mingwang Shao Haiping Lin Yang Liu Hui Huang Zhenhui Kang | 2022 | Nano Research2022，15，8： | 0 |
| 20 | Facile Synthesis of [1,2,4]Triazolo[4,3-a]pyrazin-3-amines via Oxidative Cyclization of 1-(Pyrazin-2-yl)guanidine Derivatives显示文摘In this study, we applied a novel, mild, and convenient synthetic method involving the oxidative cyclization of 1-(pyrazin-2-yl)guanidine derivatives to produce [1,2,4]triazolo[4,3-a ]pyrazin-3-amines. We optimized the reaction procedure to easily obtain 5-chloro-[1,2,4]triazolo[4,3-a ]pyrazin-3-amine. Various types of halogenated pyrazines can successfully undergo this process. We synthesized a series of 1-(pyrazin-2-yl)guanidines and [1,2,4]triazolo[4,3-a ]pyrazin-3-amines, and then elucidated their structures based on their ~1H-NMR, ^(13)C-NMR, ESI-HRMS, and nuclear Overhauser effect spectra. | Wei Li Jieqiong Kang Xueqin Zhou Dongzhi Liu Haiya Sun Fang Xu Tianyang Wang | 2019 | Transactions of Tianjin University2019，25，2： | 0 |
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