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| 1 | Underwater Image Enhancement Based on the Dark Channel Prior and Attenuation Compensation显示文摘Aimed at the two problems of underwater imaging, fog effect and color cast, an Improved Segmentation Dark Channel Prior(ISDCP) defogging method is proposed to solve the fog effects caused by physical properties of water. Due to mass refraction of light in the process of underwater imaging, fog effects would lead to image blurring. And color cast is closely related to different degree of attenuation while light with different wavelengths is traveling in water. The proposed method here integrates the ISDCP and quantitative histogram stretching techniques into the image enhancement procedure. Firstly, the threshold value is set during the refinement process of the transmission maps to identify the original mismatching, and to conduct the differentiated defogging process further. Secondly, a method of judging the propagating distance of light is adopted to get the attenuation degree of energy during the propagation underwater. Finally, the image histogram is stretched quantitatively in Red-Green-Blue channel respectively according to the degree of attenuation in each color channel. The proposed method ISDCP can reduce the computational complexity and improve the efficiency in terms of defogging effect to meet the real-time requirements. Qualitative and quantitative comparison for several different underwater scenes reveals that the proposed method can significantly improve the visibility compared with previous methods. | GUO Qingwen XUE Lulu TANG Ruichun GUO Lingrui | 2017 | Journal of Ocean University of China2017，16，5： | 4 |
| 2 | L2-LBMT:A Layered Load Balance Routing Protocol for Underwater Multimedia Data Transmission显示文摘Providing highly efficient underwater transmission of mass multimedia data is challenging due to the particularities of the underwater environment. Although there are many schemes proposed to optimize the underwater acoustic network communication protocols, from physical layer, data link layer, network layer to transport layer, the existing routing protocols for underwater wireless sensor network(UWSN) still cannot well deal with the problems in transmitting multimedia data because of the difficulties involved in high energy consumption, low transmission reliability or high transmission delay. It prevents us from applying underwater multimedia data to real-time monitoring of marine environment in practical application, especially in emergency search, rescue operation and military field. Therefore, the inefficient transmission of marine multimedia data has become a serious problem that needs to be solved urgently. In this paper, A Layered Load Balance Routing Protocol(L2-LBMT) is proposed for underwater multimedia data transmission. In L2-LBMT, we use layered and load-balance Ad Hoc Network to transmit data, and adopt segmented data reliable transfer(SDRT) protocol to improve the data transport reliability. And a 3-node variant of tornado(3-VT) code is also combined with the Ad Hoc Network to transmit little emergency data more quickly. The simulation results show that the proposed protocol can balance energy consumption of each node, effectively prolong the network lifetime and reduce transmission delay of marine multimedia data. | LV Ze TANG Ruichun TAO Ye SUN Xin XU Xiaowei | 2017 | Journal of Ocean University of China2017，16，6： | 2 |
| 3 | Controllable defects implantation in MoS2 grown by chemical vapor deposition for photoluminescence enhancement显示文摘 | Ke Wu Zhe Li Jibo Tang Xianglong Lv Hailing Wang Ruichun Luo Pan Liu Lihua Qian Shunping Zhang Songliu Yuan | 2018 | Nano Research2018，11，8： | 2 |
| 4 | Matched Field Localization Based on CS-MUSIC Algorithm显示文摘The problem caused by shortness or excessiveness of snapshots and by coherent sources in underwater acoustic positioning is considered.A matched field localization algorithm based on CS-MUSIC(Compressive Sensing Multiple Signal Classification) is proposed based on the sparse mathematical model of the underwater positioning.The signal matrix is calculated through the SVD(Singular Value Decomposition) of the observation matrix.The observation matrix in the sparse mathematical model is replaced by the signal matrix,and a new concise sparse mathematical model is obtained,which means not only the scale of the localization problem but also the noise level is reduced;then the new sparse mathematical model is solved by the CS-MUSIC algorithm which is a combination of CS(Compressive Sensing) method and MUSIC(Multiple Signal Classification) method.The algorithm proposed in this paper can overcome effectively the difficulties caused by correlated sources and shortness of snapshots,and it can also reduce the time complexity and noise level of the localization problem by using the SVD of the observation matrix when the number of snapshots is large,which will be proved in this paper. | GUO Shuangle TANG Ruichun PENG Linhui JI Xiaopeng | 2016 | Journal of Ocean University of China2016，15，2： | 1 |
| 5 | Optimal tracking control for nonlinear large-scale systems with persistent disturbances显示文摘This paper studies the optimal control with zero steady-state error problem for nonlinear large-scale systems affected by external persistent disturbances.The nonlinear large-scale system is transformed into N nonlinear subsystems with interconnect terms.Based on the internal model principle,a disturbance compensator is constructed such that the ith subsystem with external persistent disturbances is transformed into an augmented subsystem without disturbances.According to the sensitivity approach,the optimal tracking control law for the ith nonlinear subsystem can be obtained.The optimal tracking control law for the nonlinear large-scale systems can be obtained.A numerical simulation shows that the method is effective. | Ruichun TANG Xianmin LU Yili ZHAI Cunqun GONG | 2010 | 控制理论与应用(英文版)2010，8，4： | 1 |
| 6 | Optimal tracking control for linear time-delay large-scale systems with persistent disturbances显示文摘An optimal tracking control(OTC) problem for linear time-delay large-scale systems affected by external persistent disturbances is investigated.Based on the internal model principle,a disturbance compensator is constructed.The system with persistent disturbances is transformed into an augmented system without persistent disturbances.The original OTC problem of linear time-delay system is transformed into a sequence of linear twopoint boundary value(TPBV) problems by introducing a sensitivity parameter and expanding Maclaurin series around it.By solving an OTC law of the augmented system,the OTC law of the original system is obtained.A numerical simulation is provided to illustrate the effectiveness of the proposed method. | Tang Ruichun Ma Huamin Guo Shuangle Ren Lijie | 2009 | Journal of Systems Engineering and Electronics2009，20，5： | 1 |
| 7 | Molecular Marker Techniques Using Single Primers and Their Advances显示文摘Molecular marker techniques have been widely applied in the fields of genetic diversity analysis,germplasm resources identification,molecular fingerprint and genetic linkage map construction,QTL mapping and molecular assisted breeding.On the basis of stating the concept of molecular marker techniques based on single primer amplification reactions,this study focused on the sorting and induction of single-primer molecular marker techniques,and expounded their derivative development.Finally,the application prospect and future expectation of single-primer molecular marker techniques were described in detail.The purpose of this study was to clarify the types of molecular marker techniques based on single primer amplification reactions,so that researchers can quickly and conveniently select molecular marker techniques according to their own specific scientific research conditions. | Junxian LIU Jing LIU Jing JIANG Zhuqiang HAN Xiumei TANG Lihang QIU Ruichun ZHONG Liangqiong HE Haining WU Zhipeng HUANG Ronghua TANG Faqian XIONG | 2021 | Agricultural Biotechnology2021，10，2： | 0 |
| 8 | A Non-toxic and Efficient Method for Extracting DNA and RNA from Peanut显示文摘[Objectives]To establish a non-toxic and efficient method for extracting DNA and total RNA from peanuts and laying a solid foundation for the molecular biology study of peanuts.[Methods]Based on the principle and method of purifying nucleic acids by silica gel adsorption at high salt and low pH condition,a non-toxic and efficient method to extract peanut DNA and total RNA using cetyltrimethyl ammonium bromide(CTAB)extraction solution was designed.The quality and purity of nucleic acids were detected by agarose gel electrophoresis and nucleic acids protein analyzer,respectively.The quality of DNA was further verified by enzyme digestion and PCR amplification using molecular marker techniques.The quality of total RNA was further verified by reverse transcription(RT)-PCR of actin gene and cDNA-SCoT gene differential display technique.[Results]The agarose gel electrophoresis test showed that the peanut DNA extracted by a low-toxic and effective method is free of contamination and degradation.Through the detection by the nucleic acid protein analyzer,the DNA concentration,yield,A260/A280 and A260/A230 of 5 peanut varieties were 419.6-498.2 ng/μL,20.98-24.91μg/g,1.89-1.96 and 2.03-2.28,respectively.The DNA was of high quality and can be completely digested by EcoRI restriction enzymes,and also can be used for SCoT and SRAP molecular marker technology analysis.The RNA extracted from different tissues of peanuts showed no visible DNA bands by non-denaturing agarose gel electrophoresis.The separated 28S bands were brighter than 18S.The ratio of A260/A280 and A260/A230 showed that the RNA quality was good and can be used for reverse transcription,RT-PCR of actin gene and amplification of cDNA-SCoT gene differential display technique.[Conclusions]This experiment established a low-toxic and effective method for extracting DNA and total RNA from peanuts.Compared with traditional methods,this method is more time-saving and cheaper than commercial kits.The most important point is that this method does not use toxic reagents such as phenol,chloroform and isopropanol.Thus,it is expected to be widely applied in molecular biology research. | Jing LIU Congcong WANG Jing JIANG Zhuqiang HAN Xiumei TANG Lihang QIU Liangqiong HE Ruichun ZHONG Zhipeng HUANG Haining WU Ronghua TANG Junxian LIU Faqian XIONG | 2021 | Asian Agricultural Research2021，13，1： | 0 |
| 9 | Effect of Gibberellin,Light and Genotype on Somatic Embryogenesis and Plantlet Regeneration of Peanut显示文摘[Objective]Peanut in vitro regeneration system was optimized to provide technical support for its genetic transformation and mutagenesis.[Method]The effect of gibberellin,light and genotype on somatic embryogenesis and plantlet regeneration of peanut was studied using Guihua peanut cultivar as materials,leaflets as explants,MS+10 mg/L 2,4-D as somatic embryo induction medium,and MS+3 mg/L 6-BA+0.8 mg/L NAA+(0-15 mg/L)GA3as plantlet induction medium.[Result]The somatic embryo induction rate of five peanut varieties under light condition of light:dark=14 h:10 h was significantly higher compared with that under dark condition by 7.5-37.5 percent points.Among different peanut varieties,Guihua 26 represented the highest somatic embryo induction rate of62.8%,while Guihua 833 represented the lowest somatic embryo induction rate of 21.7%.Adding 5-15 mg/LGA3in plantlet induction medium was conducive to improving the induction rate of plantlets derived from somatic embryos.With addition of 5 mg/L GA3,Guihua 26 and Guihua 771 represented the highest plantlet induction rate of 42.8%and 35.3%,respectively;with addition of 15 mg/L GA3,Guihua 836,Guihua 1026 and Guihua 833 represented the highest plantlet induction rate of 38.7%,33.3%and 26.4%,respectively.Among different combinations of peanut variety and GA3concentration,plantlet induction rate reached the highest in the combination Guihua 26+5 mg/L GA3and reached the lowest in the combination Guihua 836+15 mg/L GA3.[Conclusion]Appropriate light conditions are conducive to peanut somatic embryogenesis in vitro.Adding GA3in plantlet induction medium is conducive to promoting plantlet regeneration.Guihua26 and Guihua 836 are the best peanut varieties among the experimental genotypes for somatic embryogenesis and plant regeneration. | Jing JIANG Faqian XIONG Xiumei TANG Ruichun ZHONG Liangqiong HE Zhong LI Zhuqiang HAN Ronghua TANG | 2013 | Agricultural Biotechnology2013，2，6： | 0 |
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