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A novel odor stimulation system in freely moving,behaving animals

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Integrative Zoology 2023年第4期18卷 782-797页

作者： Xinsong GUO Shan LI Xuejie YU Tingting WU Penglai LIU yufeng shao Anan LI Jiangsu Key Laboratory of Brain Disease and Bio-information Research Center for Biochemistry and Molecular BiologyXuzhou Medical UniversityXuzhouChina State Key Laboratory of Medical Neurobiology Institutes of Brain ScienceFudan UniversityShanghaiChina Artificial Auditory Laboratory of Jiangsu Province Xuzhou Medical UniversityXuzhouChina Departments of Neuroscience AnatomyHistologyand EmbryologyKey Laboratory of Preclinical Study for New Drugs of Gansu ProvinceSchool of Basic Medical SciencesLanzhou UniversityLanzhouChina

Precise and reliable presentation of odorants to animals is crucial for olfactory *** odor stimulation systems in anesthetized or awake,head-ﬁxed animals are well established,temporally precise odor presentation in awake,freely moving animals remains a ***,we describe a new odor stimulation system which presents odors directly to the nostrils of freely moving *** system comprises 3 modules:an odor-delivery module,an odor-generation module,and a control *** new system is precise and temporally reliable,and odor stimulation can be triggered by speciﬁc snifﬁng phases or other ***,the system can be combined with neural recordings,such as electrophysiology,and olfactory behavioral tests to investigate how neurons in the brain represent odor information during individual olfactory *** innovative odor stimulation system may replace traditional stimulation systems:It will enable precise odor presentation in a wide range of olfactory studies in freely moving animals.

关键词： animal behavior electrophysiology freely moving odor stimulation system olfaction

多输入多输出可见光通信系统中预编码技术的研究进展

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激光杂志 2024年第6期45卷 21-27页

作者：陈超邵宇丰王安蓉胡文光柳海楠李文臣杨林婕张颜鹭岳京歌靳清清重庆三峡学院电子与信息工程学院重庆404100

近年来,可见光通信(VLC)技术得到飞速发展,该技术兼具室内低功耗照明和宽带信号高速接入的双重功能,因此在室内大数据通信领域具有较高的应用价值。多输入多输出(MIMO)作为一种在VLC系统中能实现信道容量倍增的技术正日益引起业界关注,... 详细信息

近年来,可见光通信(VLC)技术得到飞速发展,该技术兼具室内低功耗照明和宽带信号高速接入的双重功能,因此在室内大数据通信领域具有较高的应用价值。多输入多输出(MIMO)作为一种在VLC系统中能实现信道容量倍增的技术正日益引起业界关注,但多信道具有强相关性容易导致用户间信息串扰,而在发射机中应用若干预编码技术可在一定程度上避免用户间信息干扰,且可以较低成本实现系统收发质量的提升。文章综述了MIMO-VLC系统中预编码技术的应用背景和基本原理,总结了典型线性及非线性预编码技术的研究进展,讨论并分析了该类技术的应用优势、发展趋势和面临的挑战。

关键词：可见光通信系统预编码线性非线性人工智能

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外调制倍频光生毫米波技术的研究进展

激光杂志 2024年第7期45卷 9-15页

作者：胡文光邵宇丰王安蓉陈超杨林婕李文臣柳海楠靳清清岳京歌张颜鹭重庆三峡学院电子与信息工程学院重庆404100

目前,随着光电子芯片技术的高速发展,高频毫米波通信已成为目前宽带接入网络中的重要发展技术;因为采用外调制倍频方案的光生毫米波系统兼具收发毫米波信号的高效性和稳定性,且能充分利用现有电信网络中的光纤资源,因此,在实际中具备潜... 详细信息

目前,随着光电子芯片技术的高速发展,高频毫米波通信已成为目前宽带接入网络中的重要发展技术;因为采用外调制倍频方案的光生毫米波系统兼具收发毫米波信号的高效性和稳定性,且能充分利用现有电信网络中的光纤资源,因此,在实际中具备潜在应用价值。综述了光生毫米波倍频基本原理、典型倍频仿真或实验方案及其相关测试结果的研究进展;考虑到马赫-曾德尔调制器(Mach-Zehnder Modulator,MZM)作为倍频光生毫米波的关键电光器件,因此,分析了其中的关键工作参数;最后,对光载无线通信(Radio over Fiber,RoF)系统中光生毫米波技术的应用前景进行了展望。

关键词：光载无线通信光生毫米波倍频马赫-曾德尔调制器

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杏仁核对焦虑样睡眠障碍的调控

兰州大学学报（医学版） 2024年第4期50卷 71-76页

作者：解俊樊赵雪琪高进贤任艳丽杨兴文邵玉峰侯一平兰州大学基础医学院神经科学研究所人体解剖与组织胚胎学教研室甘肃省新药临床前重点实验室甘肃兰州730000

焦虑症常与睡眠障碍共存且相互作用,一方面睡眠障碍可引起焦虑,另一方面焦虑患者常出现失眠、睡眠片段化等焦虑样睡眠改变。基底外侧杏仁核和中央杏仁核与脑内多个睡眠-觉醒调控核团存在纤维联系,是调控焦虑样行为与睡眠的关键核团。本... 详细信息

焦虑症常与睡眠障碍共存且相互作用,一方面睡眠障碍可引起焦虑,另一方面焦虑患者常出现失眠、睡眠片段化等焦虑样睡眠改变。基底外侧杏仁核和中央杏仁核与脑内多个睡眠-觉醒调控核团存在纤维联系,是调控焦虑样行为与睡眠的关键核团。本研究总结杏仁核解剖结构、纤维联系,以及杏仁核调节焦虑样行为与睡眠障碍的作用机制与神经环路,对进一步理解睡眠与焦虑相互作用的潜在机制具有重要意义,为临床治疗焦虑症和睡眠障碍提供理论基础。

关键词：焦虑睡眠-觉醒时相杏仁核睡眠障碍快动眼睡眠非快动眼睡眠

基于区块链技术的知识产权证券化风险管理分析

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科技管理研究 2023年第23期43卷 204-212页

作者：胡秀群邵玉枫海南大学国际商学院海南海口570228

从知识产权证券化风险的形成机理出发,分别从基础资产和交易流程两个方面探知其存在的风险,并在此基础上分析采用区块链技术介入知识产权证券化进行风险管理的路径:借助区块链技术的时间戳、哈希树根值以及基于区块链技术的数据库平台... 详细信息

从知识产权证券化风险的形成机理出发,分别从基础资产和交易流程两个方面探知其存在的风险,并在此基础上分析采用区块链技术介入知识产权证券化进行风险管理的路径:借助区块链技术的时间戳、哈希树根值以及基于区块链技术的数据库平台防范基础资产带来的法律风险;通过区块链特有的时间戳技术、数字签名和智能合约防范基础资产带来的收益风险;通过推进“双层结构+区块链”模式防范知识产权证券化的破产隔离风险;通过引入联盟链和智能合约技术防范交易过程中的信息不对称风险和信用风险。由此提出加快推进对区块链技术的迭代升级、加大对区块链技术人才的本土培养和引进力度,尤其是培养引进既懂知识产权证券化又懂区块链技术的“高精尖”人才,以及对监管机构、增信评级机构和各个参与机构的相关对策建议,为推进我国知识产权证券化工作提供思路。

关键词：知识产权证券化风险管理区块链技术 SPV 资产池

Study on 4PAM Radio over Fiber System Using Self-Mixing Technique

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Optics and Photonics Journal 2016年第8期6卷 83-88页

作者： Luo Chen yufeng shao Fuping Chen Shilu Shen College of Electronic and Information Engineering Chongqing Three Gorges University Chongqing China

In this paper, a simplified optical millimeter-wave generated by two optical sidebands beating together in a 60 GHz radio over fiber (RoF) system with 10 Gbit/s 4-pulse amplitude modulation (4 PAM) transmission signal is proposed and simulated. 10 Gbit/s electrical 4 PAM signals modulated are conveyed over the length of 40 km standard single mode fiber (SMF) and recovered via the self-mixing technique after detecting directly at the receiver. Graphs of time-domain wave, frequency-domain and optical spectrum are measured out in different period, and the comparison of error vector magnitude curves of NRZ and 4 PAM signals under the different length of fiber is accomplished. The capacity of 4 PAM modulation is higher, though NRZ performs better than 4 PAM selected in RoF system within 80 km of fiber length as shown in the simulation results.

关键词： Optical Communication 4PAM RoF Self-Mixing

4-Pulsed Amplitude Modulation Optical Downlink Signals Reception in Optical Access Systems Using Different Bandwidth Optical Bessel Filter

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Optics and Photonics Journal 2016年第8期6卷 89-93页

作者： Fuping Chen yufeng shao Lao Chen Shilu Shen College of Electronic and Information Engineering Chongqing Three Gorges University Chongqing China

A novel scheme which can realize high-speed optical signals transmission and reception by using 4-pulsed amplitude modulation (4-PAM) and demodulation in 10 Gb/s passive optical access systems with different bandwidth optical Bessel filter (OBF) is introduced. In this scheme, a PAM sequence generator module, an M-ary pulse generator module and one Mach-Zehnder intensity Modulator (MZM) are employed for generating the 10 Gb/s optical 4-PAM signals. And then, the generated optical 4-PAM signal achieves transmission over 20 km single mode fiber (SMF) for downstream (DS) access links application. Finally, the optical 4-PAM signal after transmission is directly detected and demodulated. We measure time-domain sequential waveform curves, optical spectrum curves, and eye-diagrams, and analyze the receiver sensitivity of 10 Gb/s 4-PAM signals before and after transmission. The received performance of the optical 4-PAM signals after transmission over 20 km single mode fiber (SMF) with different bandwidth OBF has also been analyzed.

关键词： Passive Optical Access 4-PAM OBF Downlink Bit Error Rate (BER)

FSK Modulation Scheme for High-Speed Optical Transmission

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ZTE Communications 2012年第3期10卷 2-11页

作者： Nan Chi Wuliang Fang yufeng shao Junwen Zhang Li Tao State Key Lab of ASIC&System and Department of Communication Science and EngineeringFudan UniversityShanghai 200433China

In this paper, we describe the generation, detection, and performance of frequency-shift keying （FSK） for high-speed optical transmission and label switching. A non-return-to-zero （NRZ） FSK signal is generated by using two continuous-wave （CW） lasers, one Mach-Zehnder modulator （MZM）, and one Mach-Zehnder delay interferometer （MZDI）. An RZ-FSK signal is generated by cascading a dual-arm MZM, which is driven by a sinusoidal voltage at half the bit rate. Demodulation can be achieved on 1 bit rate through one MZDI or an array waveguide grating （AWG） demultiplexer with balanced detection. We perform numerical simulation on two types of frequency modulation schemes using MZM or PM, and we determine the effect of frequency tone spacing （FTS） on the generated FSK signal. In the proposed scheme, a novel frequency modulation format has transmission advantages compared with traditional modulation formats such as RZ and differential phase-shift keying （DPSK）, under varying dispersion management. The performance of an RZ-FSK signal in a 4 x 40 Gb/s WDM transmission system is discussed. We experiment on transparent wavelength conversion based on four-wave mixing （FWM） in a semiconductor optical amplifier （SOA） and in a highly nonlinear dispersion shifted fiber （HNDSF） for a 40 Gb/s RZ-FSK signal. The feasibility of all-optical signal processing of a high-speed RZ-FSK signal is confirmed. We also determine the receiver power penalty for the RZ-FSK signal after a 100 km standard single-mode fiber （SMF） transmission link with matching dispersion compensating fiber （DCF）, under the post-compensation management scheme. Because the frequency modulation format is orthogonal to intensity modulation and vector modulation （polarization shift keying）, it can be used in the context of the combined modulation format to decrease the data rate or enhance the symbol rate. It can also be used in orthogonal label-switching as the modulation format for the payload or the label. As an example, we p

关键词： optical communication return-to-zero frequency shift keying Mach-Zehnder modulator Mach-Zehnder delay interferometer chromaticdispersion wavelength conversion label switching

Research on Dispersion Compensation of 40 GB/s Optical Duo-Binary Coded Transmission System

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Optics and Photonics Journal 2016年第8期6卷 190-195页

作者： Yue Zhou yufeng shao Zhifeng Wang Changxiang Li Junyi Zhou Wenzhe Ma Faculty of Engineering Shanghai Polytechnic University Shanghai China

A 40 Gb/s high speed optical transmission system is designed, and the different dispersion compensation schemes are adopted to realize the transmission of the optical duo-binary (ODB) signals over 120 km optical fiber. Optical duo-binary signals are generated by using a precoder, two low- pass filters (LPF) and one mach-zehnder modulator (MZM). Through combination of dispersion compensation fiber (DCF) and single mode fiber (SMF) in the transmission link, four different dispersion compensation schemes (pre-compensation, post-compensation and hybrid compensation (pre+ post) and hybrid compensation (post+ pre)) were compared. Analyzing Q factor, BER, eye diagrams and receiver sensitivity in several dispersion compensation schemes, the simulation results are: the cut-off frequency of LPF affects the transmission performance, and the hybrid compensation (post+ pre) scheme is the optimal dispersion compensation method.

关键词： Optical Communication Duo-Binary Dispersion Compensation Q Factor Eye Diagrams