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For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Application of an Entangled Chaotic System in Image Encryption DAI Wenpeng, CHEN Heng, SONG Li, LI Yongxing, HE Na Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 24-34.   DOI: 10.13438/j.cnki.jdzk.2024.02.004 Abstract （25）      PDF（pc） （6845KB）（42）       Knowledge map    Save Based on the principle of entanglement chaotic system,a kind of entanglement chaotic system with sinusoidal entanglement term is constructed.The dynamic characteristics of the system,including Lyapunov exponent (LE),bifurcation diagram and power spectrum,are analyzed by MATLAB software.In order to verify the feasibility of the circuit principle,experiments were carried out based on the Multisim circuit simulation software,and the operability of the circuit principle was proved.Finally,the chaotic sequence generated by the system is combined with DNA algorithm to encrypt the image,and the encryption is realized in the sensitive parameter range.The information entropy of the encrypted image is as high as 7.993,the histogram of gray scale is uniform,the correlation between adjacent pixels is low,and the correlation coefficient approaches 0,which shows that the security of the entangled chaotic system is good,the field of image encryption has high application value and high security performance. Reference | Related Articles | Metrics | Comments（0） Select Improved Spectrum Sensing Algorithm Based on the Difference of Limit Eigenvalues TIAN Kun, TAN Zhewen, TAN Yuhao, LEI Kejun, YANG Xi Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 35-39.   DOI: 10.13438/j.cnki.jdzk.2024.02.005 Abstract （20）      PDF（pc） （615KB）（36）       Knowledge map    Save Based on the difference between the maximum and minimum eigenvalues (DMME) of the sample covariance matrix,to improve the setting accuracy of sensing decision threshold,a new method is proposed to calculate the threshold by using the latest results of limiting eigenvalue distribution of Wishart matrix.Compared with the traditional DMME algorithm,the decision threshold setting of the proposed algorithm is more accurate.While improving the reliability of decision results,it improves the detection performance of the algorithm with limited number of samples.Both the theoretical analysis and simulation results verify the effectiveness of the proposed DMME algorithm. Reference | Related Articles | Metrics | Comments（0） Select Quantum Network Monitoring Based on Teleportation HUANG Shangjiang, ZHOU Xiaoqing, HU Xiaohuan, LUO Weidong Journal of Jishou University(Natural Sciences Edition)    2021, 42 (2): 38-44.   DOI: 10.13438/j.cnki.jdzk.2021.02.007 Abstract （706）      PDF（pc） （432KB）（174）       Knowledge map    Save Based on the characteristics of teleportation and classical information transmission, the transmission process of multi-pair entangled particle invisible state transfer network is designed with both sides of communication as the research object.To ensure that the transmission is reliable, a quantum cloning machine is used to copy and backup the quantum states, and then the information is transmitted. Considering that the third party cannot directly monitor the quantum information in the quantum channel, a method for the third party to calculate the number of data frame bits in the data link layer and a method to receive IP datagrams in the network layer is designed to indirectly realize the monitoring of the user, while solving the problem of user monitoring by the NSA for the information  transmission security and the problem of charging by the telecommunication company for the user's communication time and communication traffic. Reference | Related Articles | Metrics | Comments（0） Select Implementation of Fish Eye Image Correction Based on Bicubic Interpolation ZENG Qingli, HONG Zhiwei, DING Lei Journal of Jishou University(Natural Sciences Edition)    2021, 42 (2): 45-49.   DOI: 10.13438/j.cnki.jdzk.2021.02.008 Abstract （805）      PDF（pc） （2101KB）（191）       Knowledge map    Save firstly, the parameters of fisheye lens imaging model are calibrated by the calibration board,  specific fisheye lens image distortion correction model is established, and then the fisheye image is corrected by using the model. Secondly, the non feature points are interpolated by bicubic interpolation method, and good correction effect is achieved. Bicubic interpolation algorithm can solve the problem of image distortion caused by fish eye lens, and has a good application prospect in the field of vision navigation and monitoring.The main research steps are as follows: (1) calibrate the fisheye image with a self-made planar calibration plate; (2) restore the distorted fisheye image to the perspective image satisfying the visual effect of human eyes by using the calibrated lens distortion parameters. Reference | Related Articles | Metrics | Comments（0） Select Blind Primary User Signal Detection Algorithm Based on Matrix Eigenvalues HUANG Xiaoyu, TIAN Kun, WANG Xiangmin, YANG Xi Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2020.01.007 Select Design of Wireless Temperature and Humidity Acquisition System Based on ZigBee CHEN Huan, CHEN Xinquan Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2020.01.008 Select Comparative Study of EKF and UKF Target Tracking Based on Observation Distance ZHAO Siqi, HU Xiaotong, GUO Qin, ZENG Cuixia, DENG Xiaofei Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2020.01.009 Select Efficient Market Hypothesis，Informational Conditions and Social Welfare WANG Yue-Wu journal6    2012, 33 (1): 107-111.   DOI: 10.3969/j.issn.1007-2985.2012.01.027 Abstract （2585）      PDF（pc） （391KB）（1672）       Knowledge map    Save The author analyzes the informational conditions in line with the efficiency of capital market,and reasons the relationship between the degree of capital market’s effiency and investors’ welfare based on the market general equilibrium theory.Then,some suggestions are put forward to improve the informational conditions for Chinese capital market. Reference | Related Articles | Metrics | Comments（0） Select On Writing and Translating Abstracts of Scientific-Technological Papers SHI Lin journal6    2011, 32 (6): 112-116.   Abstract （2642）      PDF（pc） （223KB）（2677）       Knowledge map    Save From literature study and revising and translating experience,the author summarizes the characteristics of abstracts of scientific-technological papers,i.e.completeness,generality,accuracy,and economy.The common problems in some abstracts,such as information redundancy,information default,and inaccurate expression,are thus analyzed.Some suggestions on diction,voice,person,and tense used in abstracts are put forward. Reference | Related Articles | Metrics | Comments（0） Select Adjustment Variation of US-Japan Alliance on China’s Diplomatic Strategy ZENG Rui-Rui journal6    2011, 32 (1): 124-128.   Abstract （3379）      PDF（pc） （728KB）（2497）       Knowledge map    Save After the cold war,the US-Japan alliance has been making adjustment to the change of the international pattern.And now,restraining and encircling China has become the strategic goal of the US-Japan alliance.This certainly offends China’s core interests and is closely connected with China’s national security.However,because of the interest conflict,the collision of ocean strategy,cultural difference,world pattern and China’s development,there are many contradictions in the US-Japan alliance.Therefore,China should seize the opportunity and appropriately handle Sino-US and Sino-Japan relations. Reference | Related Articles | Metrics | Comments（0） Select Standardization and Drawing Skills of Function Graphs in Scientific and Technological Research Papers YI Bi-Wu journal6    2010, 31 (6): 96-99.   Abstract （2666）      PDF（pc） （406KB）（1875）       Knowledge map    Save According to the editorial experience and practice，the author discusses the standardization of simple function graphs in scientific and technological research papers.It is pointed out that the simple function graphs can be drawn by fully using logarithmic coordinates，sellecting effective base point，and combining overlaying graphs of the common coordinate.This discussion provides reference for the illustration standardization of scientific and technological books and papers. Reference | Related Articles | Metrics | Comments（0） Select Synthesis and Character of Low Substituted Dibenzo [fg,op] Naphthacenes CHENG Xiao-Hong, YE Hui, YANG Ji-Ping journal6    2007, 28 (2): 95-99.   Abstract （2229）      PDF（pc） （645KB）（1270）       Knowledge map    Save Low substituted dibenzo [fg,op] naphthacenes were synthesized by using Friedel-Crafts acylation,tadem aldol-Michael solvent -free reaction and palladium catalyzed dehydrohalogenation cyclization as key steps.Their aggregation effect in solvent and emitting character are measured on the analysis of concentration dependent 1H-NMR data and UV-vis,PL spectra respectively. Reference | Related Articles | Metrics | Comments（0） Select Some Problems that Must be Taken into Account in the Process of Editoring and Processing CHEN Can-Hua journal6    2006, 27 (1): 126-128.   Abstract （1973）      PDF（pc） （382KB）（1352）       Knowledge map    Save Some problems in the process of editoring and processing,such as the requirements,methods and points for attention,were studied.It is concluded that mistakes can be reduced or avoided only when editors obey  the principles of accuracy,clarity and simplicity,respect facts and science,respect and protect authors’copyright,and form a good working habit. Reference | Related Articles | Metrics | Comments（0）