|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Chaos correlation optical time domain reflectometry显示文摘We propose a novel correlation optical time domain reflectometry (C-OTDR) of using broadband chaotic light. This reflectometry has the advantage over the conventional OTDR and the pseudorandom signal C-OTDR in range-independent spatial resolution. We employ a laser diode with feedback from a long fiber ring cavity as the source of chaotic probe light. Experimental and numerical studies show that the chaotic light has broad and flat spectrum, and excellent correlation properties. Using this broadband chaotic laser, we experimentally demonstrate the proposed chaos C-OTDR for locating the fiber reflection events, and analyze the spatial resolution and dynamic range. The results show that the chaos C-OTDR can realize a range-independent resolution of 6 cm and its dynamic range is at least 25 km. | WANG AnBang & WANG YunCai Department of Physics, College of Science, Taiyuan University of Technology, Taiyuan 030024, China | 2010 | Science China(Information Sciences)2010，53，2： | 10 |
| 2 | MicroRNA-24 promotes pancreatic beta cells toward dedifferentiation to avoid endoplasmic reticulum stress-induced apoptosis显示文摘Current research indicates that beta cell loss in type 2 diabetes may be attributed to beta cell dedifferentiation rather than apoptosis;however,the mechanisms by which this occurs remain poorly understood.Our previous study demonstrated that elevation of microRNA-24(miR-24)in a diabetic setting caused beta cell dysfunction and replicative deficiency.In this study,we focused on the role of miR-24 in beta cell apoptosis and dedifferentiation under endoplasmic reticulum(ER)stress conditions.We found that miR-24 overabundance protected beta cells from thapsigargin-induced apoptosis at the cost of accelerating the impairment of glucosestimulated insulin secretion(GSIS)and enhancing the presence of dedifferentiation markers.Ingenuity?Pathway Analysis(IPA)revealed that elevation of miR-24 had an inhibitory effect on XBP1 and ATF4,which are downstream effectors of two key branches of ER stress,by inhibiting its direct target,Irela.Notably,elevated miR-24 initiated another pathway that targeted Mafa and decreased GSIS function in surviving beta cells,thus guiding their dedifferentiation under ER stress conditions.Our results demonstrated that the elevated miR-24,to the utmost extent,preserves beta cell mass by inhibiting apoptosis and inducing dedifFerentiation.This study not only provides a novel mechanism by which miR-24 dominates beta cell turnover under persistent metabolic stress but also offers a therapeutic consideration for treating diabetes by inducing dedifferentiated beta cells to re-differentiation. | Yunxia Zhu Yi Sun Yuncai Zhou Yan Zhang Tao Zhang Yating Li Weiyan You Xiaoai Chang Li Yuan Xiao Han | 2019 | Journal of Molecular Cell Biology2019，11，9： | 9 |
| 3 | 0.75 Gbit/s high-speed classical key distribution with mode-shift keying chaos synchronization of Fabry–Perot lasers显示文摘High-speed physical key distribution is diligently pursued for secure communication.In this paper,we propose and experimentally demonstrate a scheme of high-speed key distribution using mode-shift keying chaos synchronization between two multi-longitudinal-mode Fabry–Perot lasers commonly driven by a super-luminescent diode.Legitimate users dynamically select one of the longitudinal modes according to private control codes to achieve mode-shift keying chaos synchronization.The two remote chaotic light waveforms are quantized to generate two raw random bit streams,and then those bits corresponding to chaos synchronization are sifted as shared keys by comparing the control codes.In this method,the transition time,i.e.,the chaos synchronization recovery time is determined by the rising time of the control codes rather than the laser transition response time,so the key distribution rate is improved greatly.Our experiment achieved a 0.75-Gbit/s key distribution rate with a bit error rate of 3.8×10^(−3)over 160-km fiber transmission with dispersion compensation.The entropy rate of the laser chaos is evaluated as 16 Gbit/s,which determines the ultimate final key rate together with the key generation ratio.It is therefore believed that the method pays a way for Gbit/s physical key distribution. | Hua Gao Anbang Wang Longsheng Wang Zhiwei Jia Yuanyuan Guo Zhensen Gao Lianshan Yan Yuwen Qin Yuncai Wang | 2021 | Light(Science & Applications)2021，10，9： | 7 |
| 4 | Effect of Salinity on the Composition, Number and Size of Epidermal Cells along the Mature Blade of Wheat Leaves显示文摘咸度在房间尺寸与变化联合禁止叶生长。这研究的 Theobjective 是在盐的条件下面在叶四小麦幼苗的成熟的片决定表皮的细胞的作文,数字和尺寸的空间分布。植物在 agrowthchamber 与或没有 120 mmol/L NaCI 在卢拇的土壤被种,并且在叶四充分被开发以后,收获。沿着片的宽度的空间分发分析的结果显示出那咸度不仅减少了叶片的宽度,但是它也沿着叶轴改变了片宽度的分发模式。在叶片的最后的尺寸的减小在表皮的房间的全部的数字并且在他们的宽度和长度与减小被联系。这研究也揭示了空间效果 ofsalinityon 沿着叶轴的片和表皮的房间尺寸。特别地,咸度禁止了全部的房间数字 forinter 有气孔,姐妹和伸长的房间,在小麦叶子暗示那细胞分裂被咸度禁止。然而,长度内部有气孔的房间没被咸度影响(不同于那些为姐妹和伸长的房间) ,在咸度下面在片的最后的长度建议房间长度和数字的 therelativecontributions 到减小依赖于房间类型。 | Yuncai Hu Urs Schmidhalter | 2007 | Journal of Integrative Plant Biology2007，49，7： | 6 |
| 5 | Modulation format identification in fiber communications using single dynamical node-based photonic reservoir computing显示文摘We present a simple approach based on photonic reservoir computing(P-RC)for modulation format identification(MFI)in optical fiber communications.Here an optically injected semiconductor laser with self-delay feedback is trained with the representative features from the asynchronous amplitude histograms of modulation signals.Numerical simulations are conducted for three widely used modulation formats(on–off keying,differential phase-shift keying,and quadrature amplitude modulation)for various transmission situations where the optical signal-to-noise ratio varies from 12 to 26 d B,the chromatic dispersion varies from-500 to 500 ps/nm,and the differential group delay varies from 0 to 20 ps.Under these situations,final simulation results demonstrate that this technique can efficiently identify all those modulation formats with an accuracy of>95%after optimizing the control parameters of the P-RC layer such as the injection strength,feedback strength,bias current,and frequency detuning.The proposed technique utilizes very simple devices and thus offers a resource-efficient alternative approach to MFI. | QIANG CAI YA GUO PU LI ADONIS BOGRIS KALAN SHORE YAMEI ZHANG YUNCAI WANG | 2021 | Photonics Research2021，9，1： | 2 |
| 6 | Pose estimation based on human detection and segmentation显示文摘We address the problem of 3D human pose estimation in a single real scene image. Normally,3D pose estimation from real image needs background subtraction to extract the appropriate features. We do not make such assumption. In this paper,a two-step approach is proposed,first,instead of applying background subtraction to get the segmentation of human,we combine the segmentation with human detection using an ISM-based detector. Then,silhouette feature can be extracted and 3D pose estimation is solved as a regression problem. RVMs and ridge regression method are applied to solve this problem. The results show the robustness and accuracy of our method. | CHEN Qiang ZHENG EnLiang LIU YunCai | 2009 | Science in China(Series F)2009，52，2： | 2 |
| 7 | Chemical modification and the photoluminescence stabilization of titanic acid nanotubes显示文摘Titanic acid nanotubes (H2Ti2O4(OH)2) were surface-modified with cetyl alcohol through dehydration reaction because of existence of Ti–OH. The modified nanotubes were characterized by transmission electron microscopy (TEM), Fourier Transform Infrared (FT-IR) spectrometry and pho-toluminescence (PL) spectra. The results indicate that the modified nanotubes can be easily dis-persed into organic solvent such as chloroform and toluene in contrast with the unmodified nanotubes, which makes it easier to be assembled by LB technique. Moreover, the Ti-O-CH2(CH2)14CH3 on the surface of the nanotubes can hinder the adsorption of water and consequently the photoluminescence property of the nanotubes can be stabilized. Even though kept in humid condition or in air for a long time, the modified nanotubes also maintain the special photoluminescence property in the visible re-gion. | ZHANG Xingtang WANG Yumei ZHANG Chunmei JIANG Xiaohong TIAN Baoli LI Yuncai HUANG Yabin DU Zuliang | 2006 | Science China Chemistry2006，49，2： | 2 |
| 8 | Effects of three types of soil amendments on yield and soil nitrogen balance of maize–wheat rotation system in the Hetao Irrigation Area, China显示文摘Excessive fertilization combined with unreasonable irrigation in farmland of the Hetao Irrigation Area(HIR), China, has resulted in a large amount of nitrogen(N) losses and agricultural non-point source pollution.Application of soil amendments has become one of the important strategies for reducing N losses of farmland.However, there is still no systematic study on the effects of various soil amendments on N losses in the HIR.In this study, three types of soil amendments(biochar, bentonite and polyacrylamide) were applied in a maize–wheat rotation system in the HIR during 2015–2017.Yields of maize and wheat, soil NH3 volatilization, N2O emission and NO3– leaching were determined and soil N balance was estimated.The results showed that applications of biochar, bentonite and polyacrylamide significantly increased yields of maize by 9.2%, 14.3% and 13.3%, respectively, and wheat by 9.2%, 16.6% and 12.3%, respectively, compared with the control(fertilization alone).Applications of biochar, bentonite and polyacrylamide significantly reduced soil N leaching by 23.1%, 35.5% and 27.1%, soil NH3-N volatilization by 34.8%, 52.7% and 37.8%, and soil N surplus by 23.9%, 37.4% and 30.6%, respectively.Applications of bentonite and polyacrylamide significantly reduced N2O-N emissions from soil by 37.3% and 35.8%, respectively, compared with the control.Compared with application of biochar, applications of bentonite and polyacrylamide increased yields of maize and wheat by 5.1% and 3.5%, respectively.Our results suggest that soil amendments(bentonite and polyacrylamide) can play important roles in reducing N losses and increasing yield for the maize–wheat rotation system in the HIR, China. | WU Yan LI Fei ZHENG Haichun HONG Mei HU Yuncai ZHAO Bayinnamula DE Haishan | 2019 | Journal of Arid Land2019，11，6： | 2 |
| 9 | Solvothermal synthesis of CdS nanorods and photovoltaic characteristics of CdS/PVK composite system显示文摘Large quantities of CdS nanorods are successfully synthesized through Cd(CH3COO)2·2H2O reacting with Na2S·9H2O and EDA in aqueous solution. XRD result shows that the sample is of hexagonal structure. And TEM result shows that the morphologies of the resulting CdS are mainly in three-armed rod-like structure with a diameter of 10―15 nm and a length of 100 nm. The nanocomposites of CdS/PVK with different molar ratios are prepared by spin coating method on tin-doped indium oxide (ITO) substrate. A notable decrease of photoluminescence (PL) efficiency and a significant enhance-ment of surface photovoltage signal have been observed in CdS/PVK composites when the molar frac-tion of CdS increases. We interpret these results as the energy level matching between CdS and PVK in nanocomposites. This energy level matching facilitates fast interfacial charge transfer then increases the separation efficiency of electron-hole pairs and the carrier generation efficiency. The detailed charge transfer process has also been demonstrated. | JI YanLing CHENG Ke ZHANG HongMei ZHANG XingTang LI YunCai DU ZuLiang | 2008 | Chinese Science Bulletin2008，53，1： | 2 |
| 10 | Ultrafast and real-time physical random bit extraction with all-optical quantization显示文摘Optical chaos generated by perturbing semiconductor lasers has been viewed,over recent decades,as an excellent entropy source for fast physical random bit generation(RBG)owing to its high bandwidth and large random fluctuations.However,most optical-chaos-based random bit generators perform their quantization process in the electrical domain using electrical analog-to-digital converters,so their real-time rates in a single channel are severely limited at the level of Gb/s due to the electronic bottleneck.Here,we propose and experimentally demonstrate an all-optical method for RBG where chaotic pulses are quantized into a physical random bit stream in the all-optical domain by means of a length of highly nonlinear fiber.In our proof-of-concept experiment,a 10-Gb/s random bit stream is successfully generated on-line using our method.Note that the single-channel real-time rate is limited only by the chaos bandwidth.Considering that the Kerr nonlinearity of silica fiber with an ultrafast response of few femtoseconds is exploited for composing the key part of quantizing laser chaos,this scheme thus may operate potentially at much higher real-time rates than 100 Gb/s provided that a chaotic entropy source of sufficient bandwidth is available. | Ya Guo Qiang Cai Pu Li Ruonan Zhang Bingjie Xu K.Alan Shore Yuncai Wang | 2022 | Advanced Photonics2022，4，3： | 2 |
| 11 | Application of combined forecastingmodels to intelligent transportation systems显示文摘 | Zhang Yang Liu Yuncai | 2009 | Studies in Computational Intelligence2009，214，10： | 1 |
| 12 | A study of poly(N-vinylcarbazole) adsorbed on silver surface by SERS 显示文摘 | PEI Ning ZHANG Xing-tang LI Yuncai | 1999 | Vibrational Spectroscopy1999，21，： | 1 |
| 13 | Heat Transfer and Quenching Analysis of Combustion in A Micro Combustion vessel显示文摘 | Chen Congpeng Chao Yuncai Wu Caoyang | 2006 | Combustion Science and Technology2006，178，6： | 1 |
| 14 | Rough neural network of variable precision显示文摘 | TUO Hongya LIU Yuncai | 2004 | Neural Processing Letters2004，19，1： | 1 |
| 15 | Chaos synchronization of semiconductor lasers over 1040-km fiber relay transmission with hybrid amplification显示文摘Optical chaos communication and key distribution have been extensively demonstrated with high-speed advantage but only within the metropolitan-area network range of which the transmission distance is restricted to around 300 km.For secure-transmission requirement of the backbone fiber link,the critical threshold is to realize long-reach chaos synchronization.Here,we propose and demonstrate a scheme of long-reach chaos synchronization using fiber relay transmission with hybrid amplification of an erbium-doped fiber amplifier(EDFA)and a distributed fiber Raman amplifier(DFRA).Experiments and simulations show that the hybrid amplification extends the chaos-fidelity transmission distance thanks to that the low-noise DFRA suppresses the amplified spontaneous emission noise and self-phase modulation.Optimizations of the hybrid-relay conditions are studied,including launching power,gain ratio of DFRA to EDFA,single-span fiber length,and number of fiber span.A 1040-km chaos synchronization with a synchronization coefficient beyond 0.90 is experimentally achieved,which underlies the backbone network-oriented optical chaos communication and key distribution. | LONGSHENG WANG JUNLI WANG YUSHAN WU YUEHUI SUN SONGSUI LI LIANSHAN YAN YUNCAI WANG ANBANG WANG | 2023 | Photonics Research2023，11，6： | 1 |
| 16 | A dynamical model with next-nearest-neighbor interaction in relative velocity 显示文摘 | LI Zhipeng LIU Yuncai LIU Fuqiang | 2007 | International Journal of Modem Physics C2007，18，5： | 1 |
| 17 | Heat transfer and quenching analysis of combustion in a micro combustion vessel显示文摘 | Chen Congpeng Chao Yuncai Wu Caoyang | 2006 | Combustion Science and Technology2006，178，6： | 1 |
| 18 | Health Monitoring of Long-Haul Fiber Communication System Using Chaotic OTDR显示文摘A novel chaotic optical time-domain reflectometry(OTDR)-based approach was proposed for monitoring long-haul fiber communication systems with multiple fiber segments. The self-phase modulation and group velocity dispersion effects of the optical cable was considered in demonstrating the proof-of-concept experiment and simulation. In experiments, the correlation peaks are clearly obtained from the correlation trace between the reference and reflected(or scattered) light signals propagating in three optical-fiber segments. The technique affords a high spatial resolution of 2 m, and further long-haul fiber simulations indicate that the sensing distance can be more than 3300 km. Thus, the new proposed technique can be effectively applied for health monitoring of long-haul fiber communication systems. | Mengmeng Chen Mingjiang Zhang Shaoxiang Chen Jianguo Zhang Senlin Yan Yuncai Wang | 2020 | China Communications2020，17，5： | 1 |
| 19 | Flexible rotation of transverse optical field for 2D self-accelerating beams with a designated trajectory显示文摘Self-accelerating beams have the unusual ability to remain diffraction-free while undergo the transverse shift during the free-space propagation.We theoretically identify that the transverse optical field distribution of 2D self-accelerating beam is determined by the selection of the transverse Cartesian coordinates,when the caustic method is utilized for its trajectory design.Based on the coordinate-rotation method,we experimentally demonstrate a scheme to flexibly manipulate the rotation of transverse optical field for 2D self-accelerating beams under the condition of a designated trajectory.With this scheme,the transverse optical field can be rotated within a range of 90 degrees,especially when the trajectory of 2D self-accelerating beams needs to be maintained for free-space photonic interconnection. | Lei Zhu Xuesong Zhao Chen Liu Songnian Fu Yuncai Wang Yuwen Qin | 2021 | Opto-Electronic Advances2021，4，3： | 1 |
| 20 | Determining straight line correspondences from intensity images显示文摘 | Huang T S | 1991 | Pattern Recognition1991，24，6： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员