Information

Journal of Jilin University Science Edition
ISSN 1671-5489
CN 22-1340/O
主 任:韩啸
编 辑:赵立芹 王健 单凝 李琦
电 话:0431-88499428
E-mail:sejuj@jlu.edu.cn
地 址:长春市南湖大路5372号
    (130012)
WeChat

WeChat: JLDXXBLXB
随时查询稿件状态
获取最新学术动态
Most Down Articles
Published in last 1 year | In last 2 years| In last 3 years| All| Most Downloaded in Recent Month | Most Downloaded in Recent Year|

All
Please wait a minute...
For Selected: Toggle Thumbnails
Extraction Process Optimization of   Ganoderma Triterpenes
WEN Shuran, MA Zhanshan, ZHAN Dongling
Journal of Jilin University Science Edition    2024, 62 (2): 452-0463.  
Abstract679)      PDF(pc) (3024KB)(4622)       Save
Ganoderma lucidum spore powder was used as raw material,  ethanol  with a volume fraction of  70%  as extractant.  We adopted a combination of enzymatic  hydrolysis and ultrasound assisted extraction method,  set different liquid-solid ratios,  ultrasound time,  enzymatic hydrolysis time,  and enzyme dosage  as  four factors for a one-way test and designed a response surface experiment to  determine the optimal extraction method and its influencing factors. The   Ganoderma triterpene were separated and purified by using macroporous resin chromatography. By optimizing the  separation and purification process, the optimal elution resin,   eluent volume fraction,  flow rate of the upper sample solution and the mass ratio of the upper sample solution were determined. The compositional differences of the total  Ganoderma triterpenes were analysed by high performance liquid chromatography (HPLC). Though the pre-experimental analysis, the results show that the enzyme + ultrasound assisted extraction is more efficient compared to the single extraction method. Ethanol is used as an extractant to extract triterpenoids from Ganoderma lucidum can enhance the purity of triterpenoids. Under optimal conditions, the  rapid and accurate determination of the triterpene content can be achieved, providing a theoretical basis for the separation and purification of Ganoderma triterpenes.
Related Articles | Metrics
Stability and Hopf Bifurcation Analysis of a Class of Tumor-Immune Models
ZHAO Hanchi, LI Jiemei
Journal of Jilin University Science Edition    2024, 62 (2): 189-0196.  
Abstract749)      PDF(pc) (1508KB)(4549)       Save
We considered a  class of tumor-immune model, discussed the existence  conditions  of their equilibrium points, and used characteristic equations to analyze the local kinetic stability of each equilibrium point,  proving that the model underwent Hopf bifurcation under the corresponding conditions. By calculating the first Lyapunov coefficient, it can be concluded that if the coefficient is not zero, the model undergoes Hopf bifurcation,  the bifurcation is supercritical if the coefficient is less than zero, and the bifurcation is subcritical if the coefficient is greater than zero. Finally, numerical simulations are used to validate the theoretical analysis results.
Related Articles | Metrics
Effect of Heat Treatment on the Microstructure andMagnetic Property of Fe40Co40Zr7V2B9Ta2 Alloy
DONG Yanhua, ZENG Xuan, LIU Yaodi, WANG Lili, HUA Zhong
Journal of Jilin University Science Edition   
Monotone Iterative Method for Solving NonlinearFractional Differential Equations
HAN Xue, LI Huilai
Journal of Jilin University Science Edition   
Travelling Wave Solutions of a Class of Space-TimeFractional Whitham-Broer-Kaup Equations
GUO Lihong, ZHOU Ran
Journal of Jilin University Science Edition   
Existence of Positive Solutions for Integral BoundaryValue Problems of Fractional Differential Equationswith Parameters in Infinite Interval
LI Xiaochen, LIU Xiping, LI Yan, ZHANG Sha
Journal of Jilin University Science Edition   
Real-Time Algorithm of Reversed Car TrajectoryBased on Camera Calibration
Journal of Jilin University Science Edition   
Criterion for Positive Definiteness of Real Symmetric Tensors
WANG Feng, SUN Deshu
Journal of Jilin University Science Edition   
A New UzawaMHSS Iterative Method for Solving a Class ofComplex Singular SaddlePoint Problems
XIONG Jinsong, GAO Xingbao
Journal of Jilin University Science Edition   
Electronic Data Forensics Method Based on Docker Container
LI Pengchao, ZHOU Kai
Journal of Jilin University Science Edition    2019, 57 (06): 1485-1490.  
Abstract545)      PDF(pc) (539KB)(1752)       Save
Aiming at the shortcomings of forensic technology based on Docker container, we proposed an investigation and forensics model based on Docker host, and gave a targeted data forensics method according to the different states of the Docker host in 
the forensic model. The experimental results show that the forensics  can obtain relevant electronic evidence more specifically by using the model.
Related Articles | Metrics
Condition for Existence of a Solution ofLinear Complementarity Problem
LIU Ming, WANG Mingming, WANG Xiuyu
Journal of Jilin University Science Edition   
Heterogeneous Parallel String Matching AlgorithmBased on Mobile Platform
LIU Lei, LI Guangli, XU Yue, ZHANG Tongbo, LV Shuai
Journal of Jilin University Science Edition   
Judgment of Generalized Positive Definite Matrix andSolution of Corresponding Linear Equations
YONG Longquan
Journal of Jilin University Science Edition   
Inverse Quadratic Eigenvalue Problem and Its OptimalApproximation Solution Based on Orthogonal Projection Methods
ZHOU Shuo, BAI Yuan
Journal of Jilin University Science Edition   
A Class of Local Derivable Nonlinear Maps on Triangular Algebras
MENG Lihua, ZHANG Jianhua
Journal of Jilin University Science Edition   
(b,c)-Inverse and Its Application
KE Yuanyuan, CHEN Jianlong
Journal of Jilin University Science Edition   
RealTime Correction Method for Fisheye Video Images Distortion
LV Yaowen, AN Zhe, XU Xiping
Journal of Jilin University Science Edition   
Centralizer Mappings on Completely DistributiveCommutative Subspace Lattice Algebras
MA Fei, ZHANG Jianhua, REN Ganglian
Journal of Jilin University Science Edition   
A Cascaded Gesture Regression Algorithm Based on Improved Structure
QI Jiarui, LI Wenhui
Journal of Jilin University Science Edition   
Necessary Conditions for Frames in Sobolev Space Hs(R)
ZHANG Jianping
Journal of Jilin University Science Edition   
Precise Asymptotics of Complete Moment Convergenceofφ-Mixing Moving Average Process
ZHANG Yayun, WU Qunying
Journal of Jilin University Science Edition   
Additive Maps on Invertible Upper Triangular Matrices
LIU Hanchao, XU Xiaowei
Journal of Jilin University Science Edition   
Small UAV Attitude Estimation Based on the Algorithmof Quaternion Extended Kalman Filter
SONG Yu, WENG Xinwu, GUO Xingang
Journal of Jilin University Science Edition   
Design of Planar Spiral Coil Applied to the MagneticCoupling Resonance System
LI Wenxian, TIAN Xiaojian, YOU Yuan
Journal of Jilin University Science Edition   
Activity Recognition Based on Smart Phone Sensors and SC-HMM Algorithm
SUN Bing yi, LV Wei, LI Wen yang
Journal of Jilin University Science Edition   
Improved Arc Consistency Algorithm for Knapsacks Constraints
HUANG Wei, FU Xingyu, LI Zhanshan
Journal of Jilin University Science Edition   
Determination of Methanol and Ethanol in Ternary Mixture by Near Infrared Spectroscopy with PLS Regression
LU Jia-hui, JIANG Chao-jun, MENG Qing-fan, GAO Chao-hui, WEI Wei, ZHAO Hang, TENG Li-rong
J4   
Abstract483)      PDF(pc) (239KB)(1292)       Save
We have applied partial least squares (PLS) to establish a calibration model, the precision of which is verified by cross-validation. Via adopting optimum wavelength to calibrate, a satisfactory model has been established. In this model, the correlation coefficient in methanol determination is 0.999 91, the root mean square error of cross-validation (RMSECV) is 0.431; in ethanol de termination, the correlation coefficient is up to 0.999 98, and the RMSECV is 0.193. Compared with that of gas chromatography, the relative error of the sample determination results is not more than 3.505%.
Related Articles | Metrics
Framework of Just-in-Time Software Quality Analysis Based on Git Log
HUANG Wei, HUANG Xiaohua, ZHANG Yuan, CHEN Xiang, QIAN Zhuzhong
Journal of Jilin University Science Edition    2022, 60 (1): 135-0142.  
Abstract326)      PDF(pc) (736KB)(1258)       Save
Firstly, aiming at the problems that the existing technology could not automatically extract software repository, mark data, build quality analysis model and analyze software quality, we proposed a just-in-time quality analysis framework GIF for Python projects. Secondly, based on GIF, the top 10 most popular Python projects on GitHub were extracted and labeled, and three classical classifiers (logistic regression, naive Bayes and random forest) were used for experimental verification on the evaluation indexes of AUC and F1 values. The experimental results show that GIF framework can identify software defects in Python projects immediately and effectively, it is an easy-to-use just-in-time software quality analysis framework.
Related Articles | Metrics
Fast Image Stitching Method Based on SIFT Feature Vector Image
CHEN Yue, ZHAO Yan, WANG Shigang
Journal of Jilin University Science Edition   
Few-Shot Learning Based on  Contrastive Learning Method
FU Haitao, LIU Shuo, FENG Yuxuan, ZHU Li, ZHANG Jingji, GUAN Lu
Journal of Jilin University Science Edition    2023, 61 (1): 111-117.  
Abstract718)      PDF(pc) (702KB)(1183)       Save
Aiming at the problems existing in few-shot learning at present, we designed a new network structure and its training method to improve the few-shot learning. The  convolution network and multi-scale slide pooling method were used to enhance feature extraction in the feature embedding part of the network. The main structure  of the networks was the Siamese network  to facilitate learning semantics from small sample data through comparison between samples. The training method  of the framework adopted nested level parameter updating to ensure the stability of convergence. Compared with the common visual model and 
few-shot learning methods, the experimental results  on two classical few-shot learning datasets show that the method significantly improves the  accuracy of  few-shot learning, and  can be used as a solution  under the condition of insufficient sample.
Related Articles | Metrics
Geant4\|Based Simulation of 4He and 12C Ions Rutherford Backscattering on Thin Films
WANG Zhen chao, MA Yu gang, YANG Hai fang, NIU Lu ying, ZHOU Qing, ZHAO Guang yi, SONG Ming zhu
Journal of Jilin University Science Edition   
Boundedness of Weighted MorreyHerz Spaces with VariableKernel Singular Integrals and Fractional Differentiations
TAO Shuangping, YANG Yanqi
Journal of Jilin University Science Edition   
Distributed K-Means Clustering Algorithm Based onSampling under MapReduce Framework
YANG Jieming, WU Qilong, QU Zhaoyang, YANG Shuo, KAN Zhongfeng, GAO Ye
Journal of Jilin University Science Edition   
Structure and Composition Characteristics of Biochars Derivedfrom Biomass Wastes at Different Pyrolysis Temperatures
GUO Ping, WANG Guanzhu, XU Meng, LI Xu, LI Linhui, YU Jitong
Journal of Jilin University Science Edition   
Preparation of Porous Carbon Material from Coffee Groundsand Its Application to Lithium Ion Batteries
TIAN Wenqing, WU Xueyan, WEI Xiao
Journal of Jilin University Science Edition   
Analysis of Botnet Detection Technique Based on Traffic Graph
HE Yukun, LI Qiang, JI Yuede, GUO Dong
Journal of Jilin University Science Edition   
Wave Equation and Equation of the Ray Track Based onMaxwell Electromagnetic Theory
GUO Shouyue, ZHOU Qian, YUAN Xinghong, MU Shuhui, FENG Kecheng
Journal of Jilin University Science Edition   
Third-Order Nonlinear Optical Properties of ZnO Thin Film by Magnetron Sputtering
ZHANG Jide, LIU Chengyou, XIN Chunyu, YU Zhuo, DONG Zhenjiang
Journal of Jilin University Science Edition   
Design of Pressure Sensor Based on PVDF Piezoelectric Materials
HAN Bing, WANG Huo, MENG Fan-Gao, ZHANG Chao
J4    2012, 50 (02): 333-336.  
Abstract957)      PDF(pc) (414KB)(1043)       Save

Based on the characteristics of polyvinylidene fluoride (PVDF) piezoelectric materials, a pressure sensor was designed, which consists of probe, charge amplifier circuit, filter circuit and voltage amplifier circuit.  The vibrating elastic iron slice was deformed by the contact point displacement. The measurement of pressure can be obtained by measuring the change of piezoelectric signal of the PVDF material on the iron slice. The  sensitivity of sensor is 61.22 mV/N and may be applied to various pressure measurement.

Related Articles | Metrics
Transmission Characteristics of OneDimensional PhotonicCrystal with Complex Refractive Index Medium
WU Yiheng, LU Guoqing, HE Min, ZHAN Shengbao, SHEN Yongcai
Journal of Jilin University Science Edition