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Characteristics of Light Transmission in Summer and Winter and Its Relation to Sediment Transport in the East China Sea 被引量:2
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作者 白虹 胡敦欣 庞重光 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2003年第4期329-334,共6页
Light transmission data collected from June to July 1987 and from February to March 1997 by the R/V Kexue 1 in the East China Sea were used to analyze its distribution characteristics and its relation to the sediment ... Light transmission data collected from June to July 1987 and from February to March 1997 by the R/V Kexue 1 in the East China Sea were used to analyze its distribution characteristics and its relation to the sediment transport in this sea. Some results obtained were: (1) The Taiwan Warm Current flowing northwards seemed to be a barrier preventing suspended matter discharged from the Changjiang River Estuary from continuously moving southeastward and causing the suspended matter to flow along a path near 123°30′E in summer and 123°00′E in winter. (2) Suspended matter in the area adjacent to the Changjiang River Estuary could not be transported southward along the coast in summer due to opposing offshore currents including the Taiwan Warm Current flowing northward and the Changjiang Diluted Water turning northeastward. (3) The thermocline and temperature front bar suspended matter from crossing through. 展开更多
关键词 East China Sea light transmission sediment transport
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Experimental studies of extraordinary light transmission through periodic arrays of subwavelength square and rectangular holes in metal films 被引量:1
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作者 华一磊 傅晋欣 +2 位作者 李江艳 李志远 杨海方 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第4期413-417,共5页
We fabricate a series of periodic arrays of subwavelength square and rectangular air holes on gold films, and measure the transmission spectra of these metallic nanostructures. By changing some geometrical and physica... We fabricate a series of periodic arrays of subwavelength square and rectangular air holes on gold films, and measure the transmission spectra of these metallic nanostructures. By changing some geometrical and physical parameters, such as array period, air hole size and shape, and the incident light polarization, we verify that both global surface plasmon resonance and localized waveguide mode resonance are influential on enhancing the transmission of light through nanostructured metal films. These two resonances induce different behaviours of transmission peak shift. The transmission through the rectangular air-hole structures exhibits an obvious polarization effect dependent on the morphology. Numerical simulations are also made by a plane-wave transfer-matrix method and in good consistency with the experimental results. 展开更多
关键词 surface plasmon extraordinary light transmission metal film
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Design and Analysis of Traffic Information Transmission System Based on Visible Light Communication 被引量:1
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作者 Wei Wang Hui-Fang Liu +2 位作者 Ning Wang Zhao Hui Chi Song 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2013年第5期57-61,共5页
Visible Light Communication( VLC) based on LED is a new wireless communication technology with high response rate and good modulation characteristics in the wavelengths of 380- 780 nm. Compared with conventional metho... Visible Light Communication( VLC) based on LED is a new wireless communication technology with high response rate and good modulation characteristics in the wavelengths of 380- 780 nm. Compared with conventional methods,the waveband of VLC is harmless to human and safe to communication because of no magnetism radiation. An audio information transmission system using LED traffic lights is presented based on VLC technology. The system is consisted of transmitting terminal,receiving terminal and communication channel. Some experiments were made under real communication environment. The experimental results showed that the traffic information transmission system works steadily with good communication quality and achieves the purpose of transmitting audio information through LED traffic lights,with a data transfer rate up to 250 kbps over a distance of 5 meters. 展开更多
关键词 LED Traffic lights Visible light Communication(VLC) Audio Information transmission Intelligent Transport System(ITS)
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Separate Dimming Controlling and Data Transmission for an Indoor Visible Light Communication System 被引量:2
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作者 LIU Xiang YANG Aiying +1 位作者 LI Yankun FENG Lihui 《China Communications》 SCIE CSCD 2015年第3期71-76,共6页
Simultaneous dimming controlling and data transmission are usually required in a white LED based indoor visible light communication system.However,the diming controlling of LED normally interferes the data transmissio... Simultaneous dimming controlling and data transmission are usually required in a white LED based indoor visible light communication system.However,the diming controlling of LED normally interferes the data transmission due to the modulation nonlinearity of LED.In order to solve this problem,a scheme by separating the LEDs for the functions of dimming control and data transmission respectively is proposed in this paper.In the scheme,the LEDs used for dimming control function are driven by a dc amplified circuit,and the LEDs for data transmission are driven by a digital modulation circuit respectively.In this way,the modulation distortion to the data signal caused by the modulation nonlinearity can be avoided even if the dimming is at high level dc driven current.The proof-of-concept experiment of a 2.5Mbit/s visible light communication system demonstrates that the dimming controlling and data transmission can be realized simultaneously in a simple way,and the data transmission is not affected by the dimming controlling function.Compared to previous methods,the scheme in this paper is simpler and cost effective,and makes sense when high rate data is transmitted in a visible light communication system. 展开更多
关键词 visible light communication light emitting diode diming controlling data transmission
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TEMPORAL VARIATIONS OF HYDROLOGY AND LIGHT TRANSMISSION AT TWO FIXED OBSERVATION STATIONS IN THE EAST CHINA SEA
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作者 冯明 白虹 +1 位作者 胡敦欣 王凡 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2000年第2期97-103,共7页
The temporal variations of the hydrology and light transmission at two fixed position observation stations in the East China Sea (ECS) during February to March 1997 were analyzed. The fixed position observations were ... The temporal variations of the hydrology and light transmission at two fixed position observation stations in the East China Sea (ECS) during February to March 1997 were analyzed. The fixed position observations were conducted at 29°28’N, 124°45’E (Station 409), the center of the PN section, and at 32°N, 126°E (Station 111), the center of the ECS Cold Eddy. The results indicate: the semidiurnal tide generated semidiurnal variations of temperature, salinity and light transmission due to horizontal advection, but the re suspension effect of the semidiurnal tide still need to be analyzed; the sea surface diurnal temperature range was as large as 0.2℃ during low wind period; the resuspension due to wind disturbance at the two stations (with water depth of more than 80 m) seemed to be small; from late February to early March, the near bottom water temperature as well as light transmission at Station 111 sharply 展开更多
关键词 temperature SALINITY light transmission DIURNAL VARIATION semidiurnal VARIATION
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Real-Time Video Transmission of Visible Light Communication Based on LED
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作者 Mingsong Chen Jie Guo +1 位作者 Xiao Xu Minglan Liang 《International Journal of Communications, Network and System Sciences》 2017年第8期58-68,共11页
In order to realize the video image transmission and the excellent lighting function of the visible light communication system, a LED-based visible light communication method and system is proposed. Based on the field... In order to realize the video image transmission and the excellent lighting function of the visible light communication system, a LED-based visible light communication method and system is proposed. Based on the field programmable gate array (FPGA) hardware, the RS channel coding is applied to the visible light communication system. A pulse position decision algorithm is proposed, which is applied to the receiver of the visible light communication system to meet the error-free decision of the signal. The design of the system is based on the analog-to-digital conversion circuit, which provides a large signal dynamic range for the pulse position decision algorithm, and designs the LED driver based on the bias circuit to realize the fast broadband modulation of the signal. The test results show that the combined application of pulse position decision algorithm and Reed-Solomon codec can reduce the error of system signal and meet the real-time and reliable transmission of signal. The system can display the received video in real time from the receiver, and the whole system communication distance up to 5 m. 展开更多
关键词 VISIBLE light Communication LED REED-SOLOMON PULSE POSITION DECISION Video transmission
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Effect of Ambient Humidity on the Transmission of UV/Visible Light through Model Human Epidermis
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作者 Carlton Farley III Aschalew Kassu +1 位作者 Sandra Sadate Anup Sharma 《Open Journal of Applied Sciences》 2016年第3期153-157,共5页
Transmission of light through model human epidermal samples is investigated at four different wavelengths and at varying ambient humidity. Light from light emitting diodes (LEDs) is used for transmission measurements ... Transmission of light through model human epidermal samples is investigated at four different wavelengths and at varying ambient humidity. Light from light emitting diodes (LEDs) is used for transmission measurements through the samples at a UVA wavelength of 365 nm, and visible wavelengths of 460 nm, 500 nm, and 595 nm. Ambient air-humidity is varied between 20% and 100%. Results show that for high ambient humidity, near 100%, transmission of light through the epidermis is higher than at low ambient humidity, 60% or lower. These results are explained with a simple model of epidermis as a turbid medium and the effect of adsorbed water in reducing light-scattering by refractive-index-matching. Biological implications of increased light-transmission through epidermis at high ambient humidity are discussed. 展开更多
关键词 Model Human Epidermis Model Skin Effect of Humidity transmission of light Optical Properties of Epidermis
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The Role of Periodicity in Enhanced Transmission through Subwavelength Hole Arrays 被引量:5
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作者 孙梅 田洁 +4 位作者 李志远 程丙英 张道中 金爱子 杨海方 《Chinese Physics Letters》 SCIE CAS CSCD 2006年第2期486-488,共3页
Two kinds of subwavelength hole arrays in metallic films are designed to verify the import, ant role of the periodicity in enhanced transmission of light. The measured optical spectra show that the quasiperiodic hole ... Two kinds of subwavelength hole arrays in metallic films are designed to verify the import, ant role of the periodicity in enhanced transmission of light. The measured optical spectra show that the quasiperiodic hole arrays exhibit an enhanced transmission peak centred at 707nm with a transmission intensity of about 20%, while no plasmon resonance peak is found for the amorphous hole arrays. When the hole diameter decreases in the quasiperiodic structure, the position of the transmission peak shifts slightly, and the transmittance drops, These phenomena indicate the important role of the long-range structural order (particularly the periodicity) in assisting the coupling of incident light wave with the surface plasmon modes of the metallic structures. 展开更多
关键词 OPTICAL-transmission light transmission SURFACE-PLASMONS APERTURE FILMS
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Extraordinary Transmission through Metallic Grating with Subwavelength Slits for S-Polarization Illumination 被引量:2
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作者 苑光辉 王沛 +3 位作者 张斗国 焦小瑾 闵长俊 明海 《Chinese Physics Letters》 SCIE CAS CSCD 2007年第6期1600-1602,共3页
Based on the rigorous coupled-wave analysis algorithm, we have systematically analysed the effect of the geometrical parameters of a dielectric film coated metallic grating with subwavelength slits on extraordinary op... Based on the rigorous coupled-wave analysis algorithm, we have systematically analysed the effect of the geometrical parameters of a dielectric film coated metallic grating with subwavelength slits on extraordinary optical transmission for s-polarization illumination. Results show that the dielectric film which sustains a waveguide electromagnetic mode on the top of the metallic lamellar grating can strongly enhance the transmittance, the positions of the transmission peaks are mainly determined by the period of the metallic grating, the thickness and refractive index of the dielectric film. This structure shows potential applications in excellent polarizers or polarization-isotropic devices at infrared spectral range by appropriately choosing the geometrical parameters. 展开更多
关键词 SURFACE-RELIEF GRATINGS OPTICAL-transmission HOLE ARRAYS light PLASMONS
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Light field information transmission through scattering media with high fidelity
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作者 叶建伟 潘土强 +5 位作者 郑龛培 罗智超 徐毅 付松年 王云才 秦玉文 《Chinese Optics Letters》 SCIE EI CAS CSCD 2023年第12期70-75,共6页
Realizing high-fidelity optical information transmission through a scattering medium is of vital importance in both science and applications,such as short-range fiber communication and optical encryption.Theoretically... Realizing high-fidelity optical information transmission through a scattering medium is of vital importance in both science and applications,such as short-range fiber communication and optical encryption.Theoretically,an input wavefront can be reconstructed by inverting the transmission matrix of the scattering medium.However,this deterministic method for retrieving light field information encoded in the wavefront has not yet been experimentally demonstrated.Herein,we demonstrate light field information transmission through different scattering media with near-unity fidelity.Multi-dimensional optical information can be delivered through either a multimode fiber or a ground glass without relying on any averaging or approximation,where their Pearson correlation coefficients can be up to 99%. 展开更多
关键词 light field information transmission transmission matrix
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Generation of structured light beams with polarization variation along arbitrary spatial trajectories using tri-layer metasurfaces
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作者 Tong Nan Huan Zhao +3 位作者 Jinying Guo Xinke Wang Hao Tian Yan Zhang 《Opto-Electronic Science》 2024年第5期1-11,共11页
Conventionally,the spatially structured light beams produced by metasurfaces primarily highlight the polarization modulation of the beams propagating along the optical axis or the beams'spatial transmission trajec... Conventionally,the spatially structured light beams produced by metasurfaces primarily highlight the polarization modulation of the beams propagating along the optical axis or the beams'spatial transmission trajectory.In particular,along the optical axis,the polarization state is either constant or varies continuously in each output plane.Here,we develop innovative spatially structured light beams with continually changing polarization along any arbitrary spatial transmission trajectories.With tri-layer metallic metasurfaces,the geometric characteristics of each layer structure can be adjusted to modulate the phase and polarization state of the incident terahertz(THz)wave.The beam will converge to the predefined trajectory along several paths to generate a Bessel-like beam with longitudinal polarization changes.We demonstrate the versatility of the approach by designing two THz-band structured light beams with varying polarization states along the spatial helical transmission trajectory.Continuous linear polarization changes and linear polarization to right circular polarization(RCP)and back to linear polarization changes are realized respectively.The experimental results are basically consistent with the simulated results.Our proposal for arbitrary trajectory structured light beams with longitudinally varying polarization offers a practical method for continuously regulating the characteristics of spatial structured light beams with non-axial transmission.This technique has potential uses in optical encryption,particle manipulation,and biomedical imaging. 展开更多
关键词 structured light beam tri-layer metallic metasurface longitudinal polarization non-axial transmission
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基于注意力机制和LSTM-LightGBM的特高压直流输电线路可听噪声无效数据清洗方法
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作者 吴海荣 李振华 +1 位作者 程紫熠 张传计 《南方电网技术》 CSCD 北大核心 2024年第8期115-123,140,共10页
特高压直流输电线路可听噪声试验过程中,外界环境的突发性干扰会使实验数据中掺杂较多的无效数据,严重影响后续的数据分析。提出了一种基于注意力机制(attention mechanism,AM)和长短时记忆网络-轻量级梯度提升机(long short-term memor... 特高压直流输电线路可听噪声试验过程中,外界环境的突发性干扰会使实验数据中掺杂较多的无效数据,严重影响后续的数据分析。提出了一种基于注意力机制(attention mechanism,AM)和长短时记忆网络-轻量级梯度提升机(long short-term memory network-light gradient boosting machine,LSTM-LightGBM)的输电线路可听噪声无效数据清洗方法。首先,针对可听噪声数据的非线性、高维时序冗余特征等特点,以LSTM神经网络为基础进行特征提取;同时,引入特征维度注意力机制,自适应地分配权重来刻画关键特征信息的表达能力;进而,利用LightGBM对提取到的特征进行分类,检测出无效数据;然后,以某特高压直流输电线路实测可听噪声数据试验分析,结果表明该方法的检测精准率为95.55%,召回率为97.73%,F1分数为0.9663,均优于对比实验模型;最后,将无效数据删除并使用均值插补法填补,无效数据清洗后数据的50%值和95%值基本不变,仅降低无效数据的最大值和5%值。该算法对提高输电线路可听噪声数据的可靠性具有一定参考意义。 展开更多
关键词 输电线路 可听噪声 长短时记忆网络 注意力机制 轻量级梯度提升机 无效数据
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Location-adaptive transmission for indoor visible light communication 被引量:1
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作者 王春悦 王浪 迟学芬 《Optoelectronics Letters》 EI 2016年第1期69-73,共5页
A location-adaptive transmission scheme for indoor visible light communication(VLC) system is proposed in this paper.In this scheme,the symbol error rate(SER) of less than 10-3 should be guaranteed.And the scheme is r... A location-adaptive transmission scheme for indoor visible light communication(VLC) system is proposed in this paper.In this scheme,the symbol error rate(SER) of less than 10-3 should be guaranteed.And the scheme is realized by the variable multilevel pulse-position modulation(MPPM),where the transmitters adaptively adjust the number of time slots n in the MPPM symbol according to the position of the receiver.The purpose of our scheme is to achieve the best data rate in the indoor different locations.The results show that the location-adaptive transmission scheme based on the variable MPPM is superior in the indoor VLC system. 展开更多
关键词 light light transmission LOCATION Pulse position modulation transmissions
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The correlation and consistency of light transmission aggregometry and thrombelastography in identifying high clopidogrel on-treatment platelet reactivity in patients with acute coronary syndrome
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作者 聂小燕 胥洋 +6 位作者 扶宇 李俊蕾 梁广楷 张涌 陆芸 刘健 史录文 《Journal of Chinese Pharmaceutical Sciences》 CAS CSCD 2016年第11期838-845,共8页
Various platelet function tests are currently used to identify responsiveness to antiplatelet therapy. 176 ACS patients were enrolled and Linear regression and Kappa consistency analysis showed there was a significant... Various platelet function tests are currently used to identify responsiveness to antiplatelet therapy. 176 ACS patients were enrolled and Linear regression and Kappa consistency analysis showed there was a significant but moderate correlation between platelet inhibition rate and a significant but fair agreement between high clopidogrel on-treatment platelet reactivity tested by light transmission aggregometry and thrombelastography. 展开更多
关键词 light transmission aggregometry THROMBELASTOGRAPHY CLOPIDOGREL High platelet reactivity CONSISTENCY
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Route-asymmetrical light transmission of a fiber-chip-fiber optomechanical system
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作者 Li LIU Yunhong DING +2 位作者 Xinlun CAI Jianji DONG Xinliang ZHANG 《Frontiers of Optoelectronics》 EI CSCD 2016年第3期489-496,共8页
In this paper, we proposed and experimentally demonstrated a route-asymmetrical light transmission scheme based on the thermal radiative effect, which means that forward and backward propagations of an optical device ... In this paper, we proposed and experimentally demonstrated a route-asymmetrical light transmission scheme based on the thermal radiative effect, which means that forward and backward propagations of an optical device have different transmittances provided they are not present simultaneously. Employing a fiber-chipfiber optomechanical system, our scheme has successfully achieved a broad operation bandwidth of at least 24 nm and an ultra-high route-asymmetrical transmission ratio (RATR) up to 63 dB. The route-asymmetrical device has been demonstrated effectively with not only the continuous-wave (CW) light but also 10 Gbit/s on-off-keying (OOK) digital signals. Above mentioned unique features can be mostly attributed to the significant characteristics of the thermal radiative effect, which could cause a fiber displacement up to tens of microns. The powerful and significant thermal radiative effect opens up a new opportunity and method for route-asymmetrical light transmission. Moreover, this research may have important applications in all-optical systems, such as the optical limiters and ultra-low loss switches. 展开更多
关键词 route-asymmetrical light transmission ther- mal radiative effect optomechanical system route-asymmetrical transmission ratio (RATR)
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Optimization of top polymer gratings to improve GaN LEDs light transmission 被引量:5
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作者 Xiaomin Jin 章蓓 +5 位作者 代涛 魏伟 康香宁 张国义 Simeon Trieu Fei Wang 《Chinese Optics Letters》 SCIE EI CAS CSCD 2008年第10期788-790,共3页
We present a grating model of two-dimensional (2D) rigorous coupled wave analysis (RCWA) to study top diffraction gratings on light-emitting diodes (LEDs). We compare the integrated-transmission of the non-grati... We present a grating model of two-dimensional (2D) rigorous coupled wave analysis (RCWA) to study top diffraction gratings on light-emitting diodes (LEDs). We compare the integrated-transmission of the non-grating, rectangular-grating, and triangular-grating cases for the same grating period of 6 μm, and show that the triangular grating has the best performance. For the triangular grating with 6-μm period, the LED achieves the highest light transmission at 6-μm grating bottom width and 2.9-μm grating depth. Compared with the non-grating case, the optimized light transmission improvement is about 74.6%. The simulation agrees with the experimental data of the thin polymer grating encapsulated flip-chip (FC) GaN-based LEDs for the light extraction improvement. 展开更多
关键词 ABS resins Gallium alloys Gallium nitride light emitting diodes light transmission Optical properties Organic light emitting diodes (OLED) Polymers Semiconducting gallium TRANSPARENCY
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Influence of Partial Coherent Light on the Transmission Spectrum and Goos-H?nchen Shift in Rydberg Atomic Medium
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作者 Dilawar Ali Muhammad Umer Iftikhar +1 位作者 Muqaddar Abbas Ziauddin 《Communications in Theoretical Physics》 SCIE CAS CSCD 2019年第3期281-286,共6页
A cold atomic medium(Rydberg medium) with cascade configuration under the blockade mechanism is considered. A partial coherent light(PCL) beam is incident on the medium, which makes an angle θ with z-axis. We study t... A cold atomic medium(Rydberg medium) with cascade configuration under the blockade mechanism is considered. A partial coherent light(PCL) beam is incident on the medium, which makes an angle θ with z-axis. We study the influence of PCL field on the transmission spectrum and find high transmission of probe field for PCL field.Conversely, it is investigated that the transparency of probe field decrease for coherent light field. The transmission of probe field is also studied via beam width of PCL field and investigated high transmission of probe field for small beam width and vice versa. Interestingly, the Goos-H?nchen shift(GHS) in the transmitted light(TL) is studied for PCL field. Large negative and positive GHS in the TL are investigated for PCL field and small beam width of PCL field. 展开更多
关键词 PARTIAL COHERENT light transmission SPECTRUM Goos-Hanchen SHIFT
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High-efficiency all-dielectric transmission metasurface for linearly polarized light in the visible region 被引量:2
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作者 LIU YANG DONG WU +6 位作者 YUMIN LIU CHANG LIU ZENGHUI XU HUI LI ZHONGYUAN YU LI YU RAN YE 《Photonics Research》 SCIE EI 2018年第6期517-524,共8页
We propose and numerically investigate an efficient transmission-mode metasurface that consists of quasi- continuous trapezoid-shaped crystalline silicon nanoantennas on a quartz substrate. This metasurface provides a... We propose and numerically investigate an efficient transmission-mode metasurface that consists of quasi- continuous trapezoid-shaped crystalline silicon nanoantennas on a quartz substrate. This metasurface provides a linear phase gradient and realizes both full 2Jr phase shift and high transmission efficiency in the operating wavelength range from 740 to 780 nm. At the central wavelength around 751 nm, the total transmission efficiency is up to 88.0% and the section of the desired anomalous refraction is 80.4%. The anomalous refraction angle is 29.62°, and larger refraction angle can be achieved by changing the period of the super cell. We demonstrate a refraction angle as large as 38.59°, and the anomalous transmission efficiency reaches 76.6% at wavelength of 741 nm. It is worth mentioning that the structure is much simpler than conventional metasurfaces based on arrays of discrete nanoantennas. Our research may pave the way for designing efficient all-dielectric phase-gradient metasurfaces and applying them in integrated optical devices for wavefront control. 展开更多
关键词 METAMATERIALS Phase shift Integrated optics devices
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Flashing light in sponges through their siliceous fiber network:A new strategy of “neuronal transmission” in animals 被引量:1
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作者 WANG XiaoHong FAN XingTao +1 位作者 SCHRODER Heinz C MULLER Werner E G 《Chinese Science Bulletin》 SCIE CAS 2012年第25期3300-3311,共12页
Sponges(phylum Porifera) represent a successful animal taxon that evolved prior to the Ediacaran-Cambrian boundary(542 million years ago).They have developed an almost complete array of cell-and tissue-based interacti... Sponges(phylum Porifera) represent a successful animal taxon that evolved prior to the Ediacaran-Cambrian boundary(542 million years ago).They have developed an almost complete array of cell-and tissue-based interaction systems necessary for the establishment of a functional,multicellular body.However,a network of neurons,one cell/tissue-communication system is missing in sponges.This fact is puzzling and enigmatic,because these animals possess receptors known to be involved in the nervous system in evolutionary younger animal phyla.As an example,the metabotropic glutamate/GABA-like receptor has been identified and cloned by us.Recently,we have identified a novel light transmission/light responsive system in sponges that is based on their skeletal elements,the siliceous glass fibers,termed spicules.Two classes of sponges,the Hexactinellida and the Demospongiae,possess a siliceous skeleton that is composed of spicules.Studying the large spicules from hexactinellid sponges(>5 cm) revealed that these spicules are effective light-collecting optical fibers.Now we can report that the demosponge,Suberites domuncula,has a biosensor system consisting of the(organic) light producing luciferase and the(inorganic) light transducing silica spicules.The light transmission features of these smaller spicules(200 μm) has been demonstrated and the ability of the sponge tissue to generate light had been proven.Screening for a luciferase gene in S.domuncula was successful.In the next step,we searched for a protein potentially involved in light reception.Such a protein was identified,cloned and recombinantly expressed from S.domuncula.The protein sequence displays two domains characteristic of a cryptochrome,the N-terminal photolyase-related region and the C-terminal FAD-binding domain.The experimental data indicate that sponges may employ a network of luciferase-like proteins,a spicular system and a cryptochrome as the light source,optical waveguide and photosensor,respectively.Finally,we have identified a potential transcription factor involved in the control of the expression of luciferase and cryptochrome,a SOX-related protein.We assume that a flashing light signaling circuit exists,which may control the retinoic acid-induced differentiation of stem cells into pulsating and contracting sponge cells,and into pinacocytes and myocytes.Such a "nervous"-like signal transduction system has not been previously described. 展开更多
关键词 海绵组织 动物类群 光纤网络 硅质 神经传导 闪烁 荧光素酶基因 蛋白质序列
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200 Mb/s visible optical wireless transmission based on NRZ–OOK modulation of phosphorescent white LED and a pre-emphasis circuit 被引量:7
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作者 李洪磊 陈雄斌 +3 位作者 郭俊清 唐丹颖 黄北举 陈弘达 《Chinese Optics Letters》 SCIE EI CAS CSCD 2014年第10期16-19,共4页
We present a high-speed visible light communication (VLC) link that uses a commercially available phos- phorescent white light-emitting diode (LED). Such devices have few megahertz bandwidth due to the slow respon... We present a high-speed visible light communication (VLC) link that uses a commercially available phos- phorescent white light-emitting diode (LED). Such devices have few megahertz bandwidth due to the slow response of phosphorescent component, which severely limit the transmission data rate of VLC system. We propose a simple pre-emphasis circuit. With blue-filtering and the pre-emphasis circuit, the bandwidth of VLC system can be enhanced from 3 to 77.6 MHz, which allows non-return-to-zero on-off-keying (NRZ- OOK) data transmission up to 200 Mb/s with the bit error ratio of 5.3 × 10-7 which is below 10-6. The VLC link operates at the room illumination level of -1000 lx at 1.1 m range using a single 1 W white LED. 展开更多
关键词 Bandwidth Data communication systems Detector circuits light light emission light transmission Optical communication PHOSPHORESCENCE Wave transmission
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