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A Method to Simulate Video Signals of Real-Time Imaging for Synthetic Aperture Radar ZHANG Hong-Xin journal6    2006, 27 (6): 56-59.   Abstract （3519）      PDF（pc） （960KB）（108783）       Knowledge map    Save The video signal model for synthetic aperture radar (SAR) is set up,and a method to generate echo signals for SAR using AWG520 arbitrary waveform generator is presented.Then,the video echo signals of real-time imaging for SAR are simulated.When these video signals are inputted to the real-time processor of SAR after sampled through A/D,the performance of continuous dynamic imaging for SAR can be examined,such as join of real-time images,doppler frequency center,moving compensation of airplane and the performance of front-slant imaging,etc. Reference | Related Articles | Metrics | Comments（0）

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Numerical Solution and Matlab Simulation of Impulsive Delay Differential Equations HE Ying-Sheng journal6    2009, 30 (4): 30-33.   Abstract （6763）      PDF（pc） （1005KB）（82660）       Knowledge map    Save The authors applies Runge-Kutta methods to get the numerical solution of impulsive delay differential equations,and gives some examples of numerical simulation.The results show that the methods are successful and effective. Reference | Related Articles | Metrics | Comments（0）

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Primary Nutrient Salt Sources of Self-Pollution of Net Cage Culture in Shallow Sea GE Chang-Zi journal6    2009, 30 (5): 82-86.   Abstract （3930）      PDF（pc） （908KB）（50193）       Knowledge map    Save It is self-pollution of net cage culture stamped by eutrophication and bio-sediment to limits the healthy development of this industry.The eutrophication is mainly represented by overage accumulation of nutrient salt.In shallow sea,the excretions of cultivated organisms,fouling organisms and wild fish,exchanges of nutrient at the interface between water and sediment or particulate matters are the major nutrient salt sources of self-pollution in culture system.Thus,in the research on nutrient salt sources of net cage culture self-pollution in shallow sea,it is important to study the environmental dynamic loadings of cultivated fish,the resources and ecological effects of fouling organisms and other kinds of organisms,and nutrient salt regeneration in particulate matters or sediment. Reference | Related Articles | Metrics | Comments（0）

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General Solutions of One Order Constant CoefficientNon-Homogeneous Linear Differential Equation DENG Xue, ZHAO Jun-Feng, ZHANG Xiong-Feng journal6    2015, 36 (5): 13-15.   DOI: 10.3969/j.cnki.jdxb.2015.05.003 Abstract （4600）      PDF（pc） （239KB）（37097）       Knowledge map    Save For one order constant coefficient non-homogeneous linear differential equation y′+py=Q(x),the concrete expression of special solution with different situations of Q(x) is given through the undetermined coefficient method.The general solution formula with special solution of different expression is presented as well. Reference | Related Articles | Metrics | Comments（0）

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Method of the Image Feature Extraction WANG Zhi-Rui, YAN Cai-Liang journal6    2011, 32 (5): 43-47.   Abstract （8214）      PDF（pc） （240KB）（35011）       Knowledge map    Save Image feature extraction is a computer vision and image processing,which first uses the computer to analyze and deal with the image information,then determines the fixed features of the image,and finally,deal with the practical problems by the extracted features.Based on the principles of image technology,this paper introduces four methods of image feature extraction and their advantages and disadvantages. Reference | Related Articles | Metrics | Comments（0）

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Development of High-Precision Temperature Measurement and Control System Based on Pt100 Platinum Resistance WANG Long journal6    2009, 30 (3): 71-73.   Abstract （3458）      PDF（pc） （600KB）（29633）       Knowledge map    Save Industrial production at  certain temperature conditions will proceed in accordance with the predetermined direction,so temperature control is to ensure normal production process.The author introduces a high-precision temperature measurement and control system based on Pt100 platinum Resistance.Pt100 platinum resistance is used as temperature sensor in the system,median value average filtering is used to eliminate the sampling value of the deviation,successive approximation method to eliminate the non-linear of temperature control system,and PID algorithm to control executing agency through the implementation of PWM.Thus,in -200 ~ 601  ℃,0.1  measurement resolution and ± 0.5 ℃ control precision are ensured. Reference | Related Articles | Metrics | Comments（0）

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Curves with Null Principal Normal Vector in 3-Dimensional Minkowski Space HUANG Rong-Pei, YU Jun-Yan journal6    2012, 33 (3): 11-14.   DOI: 10.3969/j.issn.1007-2985.2012.03.004 Abstract （3467）      PDF（pc） （229KB）（29613）       Knowledge map    Save The authors study the actions on spacelike curves with null principal normal vector in 3-dimensional Minkowski space.The Euler-Lagrange equation and two Killing vector fields are found.The authors integrate the Frenet equations by constructing cylindrical coordinates around the Killing field Reference | Related Articles | Metrics | Comments（0）

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Leaf Anatomy of Scindapsus Aureus Growing Under Illumination Treatment GUI Ke-Yin, LI Yan-Lin, TANG Qian-Rui, YIN Heng, CHEN Li, HE Su-Hua journal6    2007, 28 (5): 95-98.   Abstract （5298）      PDF（pc） （1436KB）（21898）       Knowledge map    Save By means of study and comparison of leaf area,length,width,upper epidermis tissue,palisade tissue,spongy tissue,lower epidermis tissue and leaf dimension of slices of scindapsus aureus  under different illumination conditions,leaf area fitting formula was found.The results indicated that  illumination treatments had influence on the anatomy structure of leaf area,upper epidermis tissue,palisade tissue,spongy tissue and lower epidermis tissue,but had no significance impacts on the dimension of leaf of Scindapsus aureus. Reference | Related Articles | Metrics | Comments（0）

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Study on the Microencapsulation of Dihydromyricetin YAO Mao-Jun, HUANG Ji-Hong journal6    2007, 28 (3): 107-111.   Abstract （2974）      PDF（pc） （530KB）（19053）       Knowledge map    Save In this paper，the composition of wall materials and the technology of spray-drying for the microencapsulation of dihydromyritin have been  studied,and arabic gum and maltodextrin have been used as wall material.The results show that the optimum microencapsulation technologies of dihydromyricetin are that the ratio of dihydromyricetin and wall materials is 15/85,the ratio of Arabic gum and maltodextrin is 70/30,the inlet air temperature is 190 ℃ and the solid raw content is 20%,thus the microencapsulation efficiency can reach to 95%. Reference | Related Articles | Metrics | Comments（0）

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The Main Issues in the Voluntary Disclosure of  Accounting Information CHEN Ping journal6    2006, 27 (2): 119-121.   Abstract （2873）      PDF（pc） （387KB）（17700）       Knowledge map    Save The voluntary disclosure of accounting information is important to supplement and deepen the mandatory disclosure of accounting information.The economic globalization causes the globalization expansion of capital market and makes enterprises' financing mode turn from the inside to the outside.In order to attract more capital,enterprises need to provide voluntarily much more transparent information beyond the mandatory disclosure.The will of voluntary accounting information of the listed company of our country is not strong or standard enough.So the system of the voluntary of disclosure accounting information should be further standardized and perfected by encouraging. Reference | Related Articles | Metrics | Comments（0）

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Stochastic Calculus on the Frame Bundle ZHOU Hui, LIU Yong-Li journal6    2002, 23 (2): 59-61.   Abstract （2357）      PDF（pc） （1972KB）（15255）       Knowledge map    Save Associated with a canonical second order differential operator on frame bandles, there is a diffusion process.We denote by X={x∈C([0,1],Rd),x(x)=0},H=｛h∈X:‖h‖2H=∫10｜h··(t)｜2dt＜∞｝,Y=｛y∈C([0,1],s(d)):y(0)=0｝,K=｛k∈Y:‖k‖2K=∫10｜k·(t)｜2dt＜∞｝,then (β,ρ) is a Rd×s(d)-valued semimartingale satisfying the following SDE：dβ(t)=dh(t)+ρdx(t)-(dy(t))β,β(0)=0,dρ(t)=dk(t)+Ω(dx(t),β(t))+[ρ(t),dy(t)],ρ(0)=0. Reference | Related Articles | Metrics | Comments（0）

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Edge Detection of X-Ray Image Based on Wavelet Transformation XU Qian, LIU Yan journal6    2007, 28 (4): 82-84.   Abstract （2908）      PDF（pc） （586KB）（14816）       Knowledge map    Save According to X-ray image’s characteristics,a method of detecting object’s edge was presented.This method gets edge by using wavelet to seperate the edge availably and then using canny operator to pick up the edge.Simulation results indicated that the edge detection of X-ray image is an effective method. Reference | Related Articles | Metrics | Comments（0）

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Interface Technology of Image Device Based on TWAIN JIN Zhong, LIU Bo-Feng, ZHANG Lin-Shan, ZHENG Ju-Shuang, TANG Sheng-Xue, ZHANG Jin-Song, ZHOU Da-Yu journal6    2005, 26 (4): 92-95.   Abstract （3262）      PDF（pc） （363KB）（14393）       Knowledge map    Save TWAIN is a software interface for image device.Its architecture,communication protocols and session states are introduced in this article,and the practical problems of using the TWAIN protocol in VC++.net are also resolved.The TWAIN protocols is an applied and efficient method to resolve the data transmit between image software and image device. Reference | Related Articles | Metrics | Comments（0）

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A New Support Vector Regression Model LIU Guang-Li, YANG Zhi-Min journal6    2002, 23 (3): 28-31.   Abstract （3285）      PDF（pc） （1052KB）（12807）       Knowledge map    Save A new support vector regression model is presented by support vector machines (SVM) theory. The solution of the model is transformed into a quadratic programming problem. Parameters of the model can be auto-selected. It is shown that the model had a rich generalization by testing China grain production. Reference | Related Articles | Metrics | Comments（0）

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Chinese Part-of-Speech Tagging Method Based on Maximum Entropy Model and Hidden Markov Model ZHOU Tan, MO Liping, HU Meiqi, LI Hangcheng Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2020.02.004

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Design and Implementation of an Online Hotel Booking System Using Multi-Tier Architecture Fethi Abduljwad, WANG Guo-Jun journal6    2005, 26 (1): 22-26.   Abstract （3005）      PDF（pc） （864KB）（11771）       Knowledge map    Save The website is quickly becoming a critical advertising and marketing presence for an adventure tourist business.The traditional two-tier model shows striking weaknesses that make the development and maintenance of applications much more expensive.Multi-tier architecture endeavors to solve these problems.With multi-tier applications,the client provides only one layer,i.e.,the user interface.The business rules are performed on a system between the user interface and the data storage.Using this approach,a number of benefits during the application’s life cycle can be achieved,including reusability,flexibility,manageability,scalability,multi-language support and improved security.This paper deals with the design and implementation of an online hotel booking system with multi-tier architectural approach.The system uses Microsoft Visual Basic for desktop application and Structured Query Language (SQL) Server,HTML with VBScript and Active Server Pages (ASP) for the web application.The system enables the prospective guests to book different types of rooms online,keeps the database on guests,tracks when guests check in or check out and issues voucher at the time of checking out. Reference | Related Articles | Metrics | Comments（0）

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Realization of Function Optimization with Genetic Algorithm in Matlab JIANG Dong-Chu- , HE Fei, XIANG Ji-Wen journal6    2005, 26 (2): 98-100.   Abstract （4687）      PDF（pc） （691KB）（11737）       Knowledge map    Save By using the Matlab optimization toolbox,one-dimension and multi-demension variable function optimization is realized effectively with genetic algorithm(GA).Visual results and excellent performance can be obtained.A new method for the actual application of GA is established. Reference | Related Articles | Metrics | Comments（0）

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Antitoxic Effect of Extracts of Tripterospemum Cordatum Against  Deinagkistrodon Acutus Snake Venom ZHOU Luo-Qin, TIAN Hong-Xian journal6    2015, 36 (3): 90-93.   DOI: 10.3969/j.cnki.jdxb.2015.03.019 Abstract （3516）      PDF（pc） （419KB）（11507）       Knowledge map    Save The antitoxic effect of Tripterospemum cordatum aqueous extracts against Deinagkistrodon acutus snake venom is researched.The BACA/C mice were divided into five group according to the dosage of Tripterospemum cordatum aqueous extracts applied:low dosage,middle dosage,high dosage,blank group and model group,each group of health conditions being observed after 7-days intra-gastric administration.For the last time of administration,each group was intraperitoneally injected with Agkistrodon acutus snake venom after one hour later,then the mice’s poisoning performance was observed and the death rate was calculated,and each group of mice’s tissue bleeding,death and ulceration compared.The results showed that the aqueous extract of Tripterospemum cordatum at the low dosage,middle dosage and high dosage all reduced the mortality caused by Agkistrodon acutus snake venom poisoning and relieved some symptoms;with the increase of the dosage the symptoms decreased significantly,and the protection effect on the tissue was especially apparent.It can be concluded that the aqueous extract of Tripterospemum cordatum has antitoxic effect against Agkistrodon acutus snake venom and decrease the toxicity. Reference | Related Articles | Metrics | Comments（0）

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On Decomposition of Semimodules Homomorphism AI Xin, LI Qisheng Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2020.02.001

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Piecewise Curve Fitting Method of Processing Meteorological Data Based on the Orthogonal Polynomial SUN Bao-Jing journal6    2013, 34 (5): 49-52.   DOI: 10.3969/j.issn.1007-2985.2013.05.012 Abstract （3166）      PDF（pc） （324KB）（10136）       Knowledge map    Save In accordance with the characterics of the large number and complex and unpredicted trend on change of the meteorological detecting data,the piecewise curve fitting method based on the least squares of orthogonal polynomial for scattered data is presented.Firstly,the reason of using the least squares of orthogonal polynomial for scattered data is introduced from the respect of the stability of data processing.Secondly,the principle of twice piecewise curve fitting is set out in detail from the respect of the shape preserving feature of curve fitting.Finally,as the temperature detecting data for example,it is proved clearly that the twice piecewise curve fitting method can make much better fitting precision than the traditional interpolation method,and improve the level of precision and automation of the meteorological detecting data processing. Reference | Related Articles | Metrics | Comments（0）

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Global Existence and Stability of Solutions of Tempered Fractional Differential Equations ZHANG Yuyao, ZHONG Wenyong Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2020.02.002

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Pragress in the Study of Third-Order Nonlinear Optical Materials SUN Jing, HUANG Yong-Gang, WANG Xiao-Yun journal6    2012, 33 (6): 37-40.   DOI: 10.3969/j.issn.1007-2985.2012.06.010 Abstract （4104）      PDF（pc） （350KB）（9408）       Knowledge map    Save This paper summarizes the recent progress in the study of  third-order nonlinear optical (NLO) materials,introduces the third-order NLO progerties and application,and it especially emphasizes  the inorganic and organic nonlinear optical materials. Reference | Related Articles | Metrics | Comments（0）

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Uniformity of Two-Level Combined Designs Under Centered L2-Discrepancy LI Jie, OU Zujun Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2020.02.003

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Current Situation and Development Direction of Digital Image Processing Technology CHEN Bing-Quan, LIU Hong-Li, MENG Fan-Bin journal6    2009, 30 (1): 63-70.   Abstract （17313）      PDF（pc） （832KB）（8173）       Knowledge map    Save The major properties of digital image processing technology are reviewed,including the production and development of image collection and digitalization,image compression,image enhancement and reconstruction,image segmentation and image analysis.Based on the latest development in this field,the highlights in the development of those aspects are introduced.Thus,the challenge and development divection of digital image processing technology are summarized. Reference | Related Articles | Metrics | Comments（0）

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Two New Species of Sinocyclocheilus from Guangxi,China WU Zhiluan，LI Chunqing,LAN Chun,LI Weixian Journal of Jishou University（Natural Sciences Edition)    DOI: 10.3969/j.cnki.jdxb.2018.03.012

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Development of the Sports-Relaxation Tourism  in the Western Minority  Regions XIAO Hong-Qing, ZHOU Dao-Ping, TANG Li journal6    2005, 26 (4): 118-120.   Abstract （2792）      PDF（pc） （283KB）（7803）       Knowledge map    Save With the development of sports-relaxation tourism,people acknowledge more about sports-relaxation,and so have various demands for the sports-relaxation tourism products.Given the current situation of sports-relaxation tourism in the  western minority regions,the authors analyse  the issues concerning the policy and actions on how to develop and encourage the sports-relaxation tourism with the goal of rapid cultural and economic development. Reference | Related Articles | Metrics | Comments（0）

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Improved K-Means Algorithm  Based on  a Simple Genetic Algorithm YIN Peng-Fei, ZHANG Xiao-Dan journal6    2009, 30 (6): 43-45.   Abstract （4361）      PDF（pc） （362KB）（7767）       Knowledge map    Save K-means algorithm is sensitive to initial value,easy to fall into local minimum value.In response to these shortcomings,the idea of genetic algorithm is proposed based on genetic algorithm and k-means algorithm for hybrid clustering method.In order to test the performance of clustering algorithm,a set of experiments are conducted by using k-means algorithm and the improved algorithm,and the clustering results by the two algorithms are compared.It is showed that the clustering algorithm can effectively solve the clustering problem. Reference | Related Articles | Metrics | Comments（0）

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Application of Confidence Intervals and Prediction Intervals of Linear Regression ZHANG Lin-Quan journal6    2013, 34 (6): 15-18.   DOI: 10.3969/j.issn.1007-2985.2013.06.005 Abstract （7855）      PDF（pc） （382KB）（7731）       Knowledge map    Save After describing the principle of confidence intervals and prediction intervals，this paper，which applies it to analyze the relationship between such two variables as student size and quarterly turnover，tests regression equation.And the result shows that there exists high degree of fitting between these two variables since there exists a positive linear relationship between the two variables (r=0.950 1) and about 90.27% of the variation in the quarterly turnover data is explained by student size;The paper offers not only confidence intervals for the mean of y and prediction intervals for an individual y by using estimated equation，but some relevant graphs as well. Reference | Related Articles | Metrics | Comments（0）

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Online Firmware Upgrade of STM32 Single Chip Microcomputer Based on IAP Technology TANG Pengcheng,WANG Xuming,HU Li Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2019.01.006

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Community Characteristics of Reevesia Pubescens Xuefengensis in Gaowangjie National Nature Reserve, Hunan Province WANG Benzhong, LIU Huihua, YANG Sen, PENG Jingbing, XIANG Shijun Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2020.01.013

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Charge Pump PLL Circuit Design and Performance LI Bing, HUANG Zong-Hao, WU Jian-Hui journal6    2010, 31 (2): 64-68.   Abstract （3472）      PDF（pc） （238KB）（7336）       Knowledge map    Save The technology of PLL is widely used in various domain of communication.Charge Pump PLL consists of PFD,CP,LPF,VCO and frequency divider module.Grounded on the non-ideal effect of Charge Pump PLL,an optimized design has been carried out.A corresponding acting model has been created,in the process of system design,simulated and proved though simulink.Accomplished by CMOS Process and the entire system  meets the design demand and works well. Reference | Related Articles | Metrics | Comments（0）

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Optimpzed Strategies to Hyperexpress Heterologous Protein in Pichia Pastoris NIE Dong-Song, LIANG Song-Ping, LI Min journal6    2001, 22 (3): 40-44.   Abstract （3314）      PDF（pc） （529KB）（7071）       Knowledge map    Save It is very important to produce heterologous proteins both in theory and in pract ice, expecially for biopharmaceutical. Pichia pastoris has become one of the best eucaryotic expression systems in recent years.The factors influencing the high-level expression of heterologous protein in P. pastoris and the core strategies to hypere xpress heterologous proteins in P. pastoris were discussed in this paper. Reference | Related Articles | Metrics | Comments（0）

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Multianalysis on the Factors of Influencing Overseas Tourists Coming to China MA Jian-Guo, LIU Xin-Ping journal6    2010, 31 (4): 28-30.   Abstract （3294）      PDF（pc） （562KB）（6981）       Knowledge map    Save This  paper uses statistics from National Natural Science Foundation  and constructs the statistical-analysis mathematical model.It also analyzes the factors that influnce the number of overseas tourists coming to China quantifiably and gradually in-depth by SPSS software. Reference | Related Articles | Metrics | Comments（0）

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Research Progress in Biosynthesis of Gold Nanoparticles SHI Jie, FAN Shu-Min, WU Jing, KANG Xiao-Hui, YIN Yu-Jing, WANG Rui-Yong journal6    2012, 33 (3): 71-75.   DOI: 10.3969/j.issn.1007-2985.2012.03.017 Abstract （4203）      PDF（pc） （369KB）（6745）       Knowledge map    Save Gold nanoparticles are attracting great attention due to their unique optical,electronic and catalytic properties.Recently,biosynthesis of gold nanoparticles has become a research hotspot due to its economic，non-toxic and eco-friendly characteristics.This article provides an overview of current research methods of biosynthesis of gold nanoparticles using bacteria，fungi,actinomycetes，yeast and various plant materials.Different methods are compared,and the characteristics，control of size and shape，and the synthesis mechanisms are discussed.Finally,the application of biosynthesis of gold nanoparticles and the developing trend in the future are also prospected. Reference | Related Articles | Metrics | Comments（0）

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Progress in the Diagnosis and Treatment of Primary Central Nervous System Diffuse Large B-Cell Lymphoma ZHANG Rujiang, ZHANG Yunzhou, GAO Daiquan Journal of Jishou University(Natural Sciences Edition)    2021, 42 (6): 54-61.   DOI: 10.13438/j.cnki.jdzk.2021.06.009 Abstract （1253）      PDF（pc） （3932KB）（6481）       Knowledge map    Save In order to further improve the understanding of primary central nervous system diffuse large B-cell lymphoma (PCNS-DLBCL), PubMed, CNKI and other databases were used to search related literature on the diagnosis and treatment of primary central nervous system lymphoma, and then The pathogenesis, clinical manifestations, diagnostic methods and treatment measures of PCNS-DLBCL are reviewed. PCNS-DLBCL is a subtype of extranodal non-Hodgkin’s lymphoma that can affect any part of the central nervous system. Its pathogenesis includes the presence of Epstein-Barr virus, increased expression of PD-L1 and PD-L2, MYD88 gene mutation and CD79B Gene mutations, etc.; clinical manifestations lack specificity, high degree of malignancy, easy to relapse, and poor prognosis; diagnostic methods include imaging examination, cerebrospinal fluid examination, immunohistochemistry and histopathological examination, pathological examination is the gold standard for diagnosis; PCNS-DLBCL treatment measures include radiotherapy, chemotherapy, autologous stem cell transplantation, and combined radiotherapy and chemotherapy. At present, induction chemotherapy based on high-dose methotrexate is the best treatment plan. Reference | Related Articles | Metrics | Comments（0）

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Optimality Condition for Fractional Optimization Problem TIAN Chaosong, WANG Xianyun Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2020.01.001

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A New Set of Sufficient Conditions for Nonsingular H-Matrices JIANG Wenwen, TUO Qing Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2020.04.001

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Higher-Order Topological Corner States in 2D Valley Phononic Crystals Topological Insulators JIANG Jing, KONG Peng, DENG Ke Journal of Jishou University(Natural Sciences Edition)    2025, 46 (1): 39-44.   DOI: 10.13438/j.cnki.jdzk.2025.01.006 Abstract （637）      PDF（pc） （7499KB）（6294）       Knowledge map    Save Based on the quantum valley-hall effect,a two-dimensional valley phononic crystal topological insulator with C3v symmetry has been designed.By rotating the angle of the scatterers inside the lattice,the topological properties of the lattice were changed.A supercell structure was constructed using two-dimensional valley phononic crystals with different topological phases,and the high-order topological corner states were investigated.The results show that when the rotation angle is changed,the symmetry of the system will decrease from C3v symmetry to C3 symmetry.When -30°<θ< 0°,the system corresponds to a non-trivial phase,while when 0°<θ<30°,the system corresponds to a trivial phase.When the internal lattice has a non-trivial phase and the external lattice has a trivial phase,there are three continuous corner states at the corners of the Zigzag boundary of the supercell structure.However,when the internal lattice has a trivial phase and the external lattice has a non-trivial phase,there are no corner states in the supercell structure.Before and after introducing disorder defects,the intrinsic field distribution of the corner states shows no significant change,demonstrating good robustness. Reference | Related Articles | Metrics | Comments（0）

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Gradient Estimation and Analytic Properties of Solutions to Heat Conduction Equations XING Jiasheng, YANG Yichuan, WU Sang Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2020.04.002

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Matlab Simulation Analysis of Fourier Spectrum Based on FFT YE Fu-Qiu journal6    2011, 32 (1): 49-51.   Abstract （5688）      PDF（pc） （867KB）（5857）       Knowledge map    Save The interference pattern of the sodium lamp light and the mercury lamp light is measureed by Michael interference device,using the transformation relations of the interference pattern and the spectra which exist in Fourier spectrum,the sodium lamp and mercury lamp radiation spectrum is analyzed by fast Fourier transform method.The results show that the Fourier transform spectrum can clearly display the radiation spectrum of the radiation source. Reference | Related Articles | Metrics | Comments（0）