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| 1 | A novel LMI criterion for power system stability with multiple time-delays显示文摘This paper presents a novel LMI criterion for electric power system stability with multiple time-delays.Initially,the linear time-invariant model of the power system with multiple delays is constructed,subsequently,the former criteria and the novel criterion of this paper are demonstrated in this paper,and the novel criterion is fully proved according to Lyapunov direct method.Specifically,the proposed criterion utilizes a properly simplified Lyapunov-Krasovskii functional,and no free-weighting matrix is introduced in the formation of new criterion,as a consequence,the calculation efficiency is remarkably enhanced.A typical second-order delay system,a single-generator-infinite-bus system and the WSCC 3-generator-9-bus delay system are taken to validate the effectiveness and efficiency enhancement of the proposed criterion.The numerical results indicate that the criterion of this paper can generate the same stability margin with the former ones.Further,the numerical results also verify that the proposed criterion’s efficiency is substantially boosted and calculation time is greatly curtailed. | JIANG YiLang JIANG Tao JIA HongJie DONG ChaoYu | 2014 | Science China(Technological Sciences)2014，57，7： | 13 |
| 2 | Numerical study on the correlation of transonic single-degree-of-freedom flutter and buffet显示文摘Transonic single-degree-of-freedom(SDOF) flutter and transonic buffet are the typical and complex aeroelastic phenomena in the transonic flow. In this study, transonic aeroelastic issues of an elastic airfoil are investigated using Unsteady Reynolds-Averaged Navier-Stokes(URANS) equations. The airfoil is free to vibrate in SDOF of pitching. It is found that, the coupling system may be unstable and SDOF self-excited pitching oscillations occur in pre-buffet flow condition, where the free-stream angle of attack(AOA) is lower than the buffet onset of a stationary airfoil. In the theory of classical aeroelasticity, this unstable phenomenon is defined as flutter. However, this transonic SDOF flutter is closely related to transonic buffet(unstable aerodynamic models) due to the following reasons. Firstly, the SDOF flutter occurs only when the free-stream AOA of the spring suspended airfoil is slightly lower than that of buffet onset, and the ratio of the structural characteristic frequency to the buffet frequency is within a limited range. Secondly, the response characteristics show a high correlation between the SDOF flutter and buffet. A similar 'lock-in' phenomenon exists, when the coupling frequency follows the structural characteristic frequency. Finally, there is no sudden change of the response characteristics in the vicinity of buffet onset, that is, the curve of response amplitude with the free-stream AOA is nearly smooth. Therefore, transonic SDOF flutter is often interwoven with transonic buffet and shows some complex characteristics of response, which is different from the traditional flutter. | GAO ChuanQiang ZHANG WeiWei LIU YiLang YE ZhengYin JIANG YueWen | 2015 | Science China(Physics,Mechanics & Astronomy)2015，58，8： | 4 |
| 3 | A progressive method for the collapse of river representation considering geographical characteristics显示文摘During map generalization,the collapse of geometry,which is also called geometric dimension reduction,is a basic generalization operation.When the map scale decreases,rivers with long,shallow polygonal shapes,usually require their dual-line representation to be collapsed to a single line.This study presents a new algorithm called superpixel river collapse(SURC)to convert dual-line rivers to single-line rivers based on raster data.In this method,dual-line rivers are first segmented at different levels of detail using a superpixel method called simple linear iterative clustering.Then,by connecting the edge midpoints and centre of mass of each superpixel,single-line rivers are preliminarily generated from dual-line rivers.Finally,an interpolation algorithm called polynomial approximation with an exponential kernel is applied to maintain the uniform distribution of the feature points of single-line rivers at different levels of detail(LOD).The presented method can progressively collapse the river during scale transformation to support the LOD representation in a highly sensitive way.The results show that compared with three typical thinning algorithms,the SURC method can generate smooth single-line rivers from dual-line rivers considering different river widths while effectively avoiding burrs and fractured intersections. | Yilang Shen Tinghua Ai Jingzhong Li Lina Huang Wende Li | 2020 | International Journal of Digital Earth2020，13，12： | 3 |
| 4 | Abnormal changes of dynamic derivatives at low reduced frequencies显示文摘A number of studies have found that abnormal changes of dynamic derivatives occurred at very low reduced frequencies, but its inducement mechanism is not very clear. This paper has researched the abnormal changes and analyzed the influence on some parameters by solving the unsteady flow around forced oscillation airfoils based on Navier-Stokes equations. Results indicate that when the reduced frequency approaches to zero, the dynamic derivatives obtained by the numerical method will diverge. We have also proven it in theory that this phenomenon is not physical but completely caused by numerical singularity. Furthermore, the abnormal phenomenon can be effectively mitigated by using the time spectral method to solve the aerodynamic forces and the integral method to obtain the dynamic derivatives. When the reduced frequency is in the range of 0.001–0.01, the dynamic derivative maintains nearly unchanged for the whole speed region. This study can provide a reference for the reasonable choice of the reduced frequency in calculations and experiments of dynamic derivatives. | Weiwei ZHANG Yiming GONG Yilang LIU | 2018 | Chinese Journal of Aeronautics2018，31，7： | 2 |
| 5 | Red phosphorescent organic light-emitting diodes based on a novel host material with thermally activated delayed fluorescent properties显示文摘High cost of phosphors and significant efficiency roll-off at high brightness are the two main factors that limit the wide application of phosphorescent organic light-emitting diodes (PHOLEDs). Efforts have been paid to find ways to reduce the phosphors’ concentration and efficiency roll-off of PHOLEDs. In this work, we reported red emission PHOLEDs with low dopant concentration and low efficiency roll-off based on a novel host material 2,4-biscyanophenyl-6-(12-phenylindole[2,3-a]carbazole-11-yl)-1,3,5-triazine (BCPICT), with thermally activated delayed fluorescent(TADF) properties. The device with 1.0% dopant concentration displayed a maximum external quantum efficiency of 10.7%.When the dopant concentration was increased to 2.0%, the device displayed a maximum external quantum efficiency of 10.5% and a low efficiency roll-off of 5.7% at 1000 cd/m2. | Yilang Li Dongdong Zhang Yunge Zhang Minghan Cai Lian Duan | 2016 | Science China Chemistry2016，59，6： | 2 |
| 6 | The effect of the tightness of abdominal beats on the determination of maximal acceptable weight of lift显示文摘 | Chen Yilang | 2003 | International Journal of Industrial Ergonomics2003，311，： | 1 |
| 7 | Cutset- angle based wide area thermal security region and its application in China southern power grid显示文摘 | Jiang Tao Jia Hongjie Jiang Yilang | 2014 | Inter- national Transactions on Electrical Energy Systems2014，24，11： | 1 |
| 8 | Fast frequency response of inverter-based resources and its impact on system frequency characteristics显示文摘The inertia response and primary frequency regulation capability of synchronous grids are declining owing to the increasing penetration of inverter-based resources. The fast frequency response(FFR) of inverter-based resources is an important mitigation option for maintaining grid security under the conditions of low inertia and insufficient primary frequency response capability. However, the understanding and technical characteristics of the FFR of inverter-based resources are still unclear. Aiming at solving the aforementioned problems, this paper proposes a definition for FFR based on the impact mechanism of FFR on system frequency. The performance requirements of FFR are clarified. Then, the effects of FFR on system frequency characteristics are further analyzed based on steady-state frequency deviation, the initial rate of change of frequency, and the maximum transient frequency deviation. Finally, the system requirements for FFR and its application effects are verified by simulating an actual bulk power grid, providing technical support for subsequent engineering application. | Lining Su Xiaohui Qin Shang Zhang Yantao Zhang Yilang Jiang Yi Han | 2020 | Global Energy Interconnection2020，3，5： | 1 |
| 9 | A raster-based typification method for multiscale visualization of building features considering distribution patterns显示文摘In map multiscale visualization,typification is the process of replacing original objects,such as buildings,using a smaller number of objects while maintaining initial geometrical and distribution characteristics.During the past few decades,many vector-based methods for building typification have been developed,whereas raster-based methods have received less attention.In this paper,a new method for the typification of buildings with different distribution patterns called superpixel building typification(SUBT)is developed based on raster data.Using this method,buildings with different distribution patterns,such as linear,grid and irregular patterns,are first grouped by image connected component detection and superpixel analysis.Then,the new positions for building typification are determined by superpixel resegmentation.Finally,a new representation of the buildings is determined through analysis of the orientation and shape of the buildings in each superpixel.To test the proposed SUBT method,buildings from both cities and countrysides in China are applied to perform typification.The experimental results show that the proposed SUBT method can realize typification for buildings with linear,grid and irregular distributions while effectively maintaining the original distribution characteristics of the buildings. | Yilang Shen Jingzhong Li Ziqi Wang Rong Zhao Lu Wang | 2022 | International Journal of Digital Earth2022，15，1： | 1 |
| 10 | The effect of the tightness of abdominal belts on the determination of maximal acceptable weight of lift 显示文摘 | CHEN Yilang | 2003 | International journal of Industrial Ergonomics2003，31，： | 1 |
| 11 | Implementation of a three-level rectifier for power factor correction显示文摘 | Lin BorRen Hou YiLang Chiang HuannKeng | 2000 | IEEE Transactions on Power Electronics2000，15，5： | 1 |
| 12 | The effect of the tightness of abdominal belts on the determination of maximal acceptable weight of lift 显示文摘 | CHEN Yilang | 2003 | International Journal of Industrial Ergonomics2003，31，： | 1 |
| 13 | Opiate addiction in China:current situation and treatments显示文摘 | Tang Yilang Zhao dong Zhao Chengzheng | 2006 | Addiction2006，101，5： | 1 |
| 14 | Clozapine in China 显示文摘 | TANG Yilang MAO Peixian JIANG Feng | 2008 | Pharmacopsychiatry2008，41，1： | 1 |
| 15 | Infrared spectroscopy and chemometrics for the starch and protein prediction in irradiated rice显示文摘 | Yongni Shao Yilang Cen Yong He Fei Liu | 2010 | Food Chemistry2010，，4： | 1 |
| 16 | High‐Efficiency Fluorescent Organic Light‐Emitting Devices Using Sensitizing Hosts with a Small Singlet–Triplet Exchange Energy显示文摘 | Dongdong Zhang Lian Duan Chen Li Yilang Li Haoyuan Li Deqiang Zhang Yong Qiu | 2014 | Adv Mater2014，，29： | 1 |
| 17 | Towards High Efficiency and Low Roll‐Off Orange Electrophosphorescent Devices by Fine Tuning Singlet and Triplet Energies of Bipolar Hosts Based on Indolocarbazole/1, 3, 5‐Triazine Hybrids显示文摘 | Dongdong Zhang Lian Duan Yilang Li Haoyuan Li Zhengyang Bin Deqiang Zhang Juan Qiao Guifang Dong Liduo Wang Yong Qiu | 2014 | Adv Funct Mater2014，，23： | 1 |
| 18 | CX3C-chemokine receptor 1 modulates cognitive dysfunction induced by sleep deprivation显示文摘Background:Microglia plays an indispensable role in the pathological process of sleep deprivation(SD).Here,the potential role of microglial CX3C-chemokine receptor 1(CX3CR1)in modulating the cognition decline during SD was evaluated in terms of microglial neuroinflammation and synaptic pruning.In this study,we aimed to investigat whether the interference in the microglial function by the CX3CR1 knockout affects the CNS's response to SD.Methods:Middle-aged wild-type(WT)C57BL/6 and CX3CR1^(−/−)mice were either subjected to SD or allowed normal sleep(S)for 8 h to mimic the pathophysiological changes of middle-aged people after staying up all night.After which,behavioral and histological tests were used to explore their different changes.Results:CX3CR1 deficiency prevented SD-induced cognitive impairments,unlike WT groups.Compared with the CX3CR1^(−/−)S group,the CX3CR1^(−/−)SD mice reported a markedly decreased microglia and cellular oncogene fos density in the dentate gyrus(DG),decreased expression of pro-inflammatory cytokines,and decreased microglial phagocytosis-related factors,whereas increased levels of anti-inflammatory cytokines in the hippocampus and a significant increase in the density of spines of the DG were also noted.Conclusions:These findings suggest that CX3CR1 deficiency leads to different cerebral behaviors and responses to SD.The inflammation-attenuating activity and the related modification of synaptic pruning are possible mechanism candidates,which indicate CX3CR1 as a candidate therapeutic target for the prevention of the sleep loss-induced cognitive impairments. | Jiawei Xin Chao Wang Xiaojuan Cheng Changfu Xie Qiuyang Zhang Yilang Ke Xuanyu Huang Xiaochun Chen Xiaodong Pan | 2022 | Chinese Medical Journal2022，，2： | 0 |
| 19 | Immunostimulant nanomodulator boosts antitumor immune response in triple negative breast cancer by synergism of vessel normalization and photothermal therapy显示文摘Tumor vascular dysfunction and immune suppression predict poor outcomes of tumor therapy.Combination of photothermal therapy(PTT)and vessel normalization with tumor immunotherapy is promising to augment antitumor benefit.Herein,we develop a potential immunostimulatory nanomodulator for treatment of triple-negative breast cancer(TNBC)treatment via synergism of PTT,vessel normalization,and priming of tumoral suppressive immune microenvironment by blocking transforming growth factor-β(TGF-β)pathway.The nanomodulator,namely Vac@Apt@BPs,is developed by conjugation of TGF-βinhibitor Vactosertib(Vac)and nucleolin-recognizing aptamer(Apt)on the surface of black phosphorus nanoparticles(BPs).Vac@Apt@BPs show good accumulation in TNBC via aptamer-induced active targeting of TNBC.Via the blockade of TGF-βsignaling,Vac@Apt@BPs effectively inhibit the formation of tumor neovascular,and normalize the vessels to recover vascular integrity and alleviate the hypoxia stress.Together with the tumor eradication and immunogenic cell death via PTT,robust immune response was boosted by promoted maturation of dendritic cells,suppression of regulatory T cells,and stimulation of effective T cells.This synergistic therapeutic strategy potentially suppresses the growth of TNBC in mice. | Hao Jiang Yilang He Jia Zhao Ruimin Chang Hailun He Tan Li Xingyu Zhang Bo Shu Wenxuan Zhang Huaiyu Wang Jing Liu Shubing Zhang Yuetao Zhao | 2023 | Nano Research2023，16，8： | 0 |
| 20 | Integrating multi-modal information to detect spatial domains of spatial transcriptomics by graph attention network显示文摘Recent advances in spatially resolved transcriptomic technologies have enabled unprecedented opportunities to elucidate tissue architecture and function in situ.Spatial transcriptomics can provide multimodal and complementary information simultaneously,including gene expression profiles,spatial locations,and histology images.However,most existing methods have limitations in efficiently utilizing spatial information and matched high-resolution histology images.To fully leverage the multi-modal information,we propose a SPAtially embedded Deep Attentional graph Clustering(SpaDAC)method to identify spatial domains while reconstructing denoised gene expression profiles.This method can efficiently learn the low-dimensional embeddings for spatial transcriptomics data by constructing multi-view graph modules to capture both spatial location connectives and morphological connectives.Benchmark results demonstrate that SpaDAC outperforms other algorithms on several recent spatial transcriptomics datasets.SpaDAC is a valuable tool for spatial domain detection,facilitating the comprehension of tissue architecture and cellular microenvironment.The source code of SpaDAC is freely available at Github(http://gffzz188fe103f8f1460asquwf96bcvcuk6b9u.ffgz.tsg.suse.edu.cn/huoyuying/SpaDAC.git). | Yuying Huo Yilang Guo Jiakang Wang Huijie Xue Yujuan Feng Weizheng Chen Xiangyu Li | 2023 | Journal of Genetics and Genomics2023，50，9： | 0 |
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