Journal of Hebei University(Natural Science Edition)

Properties of fuzzy different

YOU Cuilian,WANG Weiqing

2015, 35(2): 113-117. DOI: 10.3969/j.issn.1000-1565.2015.02.001

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To solve fuzzy differential equation driven by Liu process， some properties of a new kind of fuzzy differential (Liu differential) are needed. Two mean value theorems of fuzzy differential and four fuzzy differential formulas are given in this paper. Furthermore， these conclusions are extended to the case of complex fuzzy process. The studies above laid a theoretical foundation for calculation and application of the fuzzy differential equation.

Photocatalytic properties of rare earth La3+ ion modified Nano-TiO2-xFx

MA Xiaoyan, ZHANG Rongxiang, LI Ling，ZHAO Xiaohui

2015, 35(2): 122-127. DOI: 10.3969/j.issn.1000-1565.2015.02.003

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The La ion-modified nanometer TiO2-xFx photocatalyst emulsion with visible light photocatalytic activity was synthesized by using complexation-controlled hydrolysis at room temperature with titanium tetrachloride, lanthanum nitrate, thiourea, ammonium fluoride, ammonia as raw materials. The sample phase, particle size, composition, and light absorption properties were characterized by using XRD, UV-Vis, and Nanometer laser particle size analyzers. Under the sunlight, the photocatalytic performance of La-modified TiO2-xFx emulsion through degradating acid red 3R dye was investigated. The results show that when the La doping concerntration is 0.1%, F doping concerntration is 0.3%, the pH value is 6, and reflux time is 15 min, the degradation of acid red 3R dye is more than 95%.

Mutual Influence Between the Adjacent Surface Discharges in a Dielectric Barrier Discharge

Hao Zhang, Lifang Dong, Longhu Zhao, Wang Qian

2015, 35(2): 128-130. DOI: 10.3969/j.issn.1000-1565.2015.02.004

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The mutual influence between the adjacent surface discharges is investigated in a dielectric barrier discharge (DBD) system by using analogue simulation for the first time. In air-argon dielectric barrier discharge, the discharge undergoes four filaments-five filaments and the shape of surface discharge also changed with the applied voltage increases . In addition, the electric field distribution and electric potential distribution is established to conduct simulation in the locations of the corresponding filaments.

Effects of licorice processing conditions on content and proportion of 18α-glycyrrhizic acid and 18β-glycyrrhizic acid

ZHAO Yanyan，LI Yang，LIU Liyan，LIU Yafei， SUN Dong，GAO Bo

2015, 35(2): 138-146. DOI: 10.3969/j.issn.1000-1565.2015.02.006

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To study the effects and change rule of licorice processing conditions on the content and proportion of the principal component isomer 18α-glycyrrhizic acid(18α-Gly) and 18β-glycyrrhizic acid (18β-Gly)，and on the content of impurity during processing. The assay was carried out on a Durashell-C18 column(250 mm×4.6 mm，5 μm) with 0.01 mol/L ammonium perchlorate(the pH value was adjusted to 8.20 with ammonia)-methanol(48:52，V/V) as mobile phase at a flow rate of 0.80 mL/min，and the detection wavelength was set at 254 nm. The column temperature was 50 ℃ and the injection volume was 10 μL. Effects of processing time，processing temperature on the content of principal component and impurity，and on the proportion of principal component isomer were observed. Compared with licorice pieces，the total content of principal component were declined after processing. The loss of the principal component in licorice pieces were gradually increased with the extended processing time. But the proportion of principal component isomer 18α-Gly，18β-Gly remained constant. When processing temperature below 90 ℃，the effects of processing time，processing temperature on the content of the principal component and impurity in licorice pieces is not obvious. When heated to 140 ℃，the degradation of 18α-Gly，18β-Gly occurred with the extended processing time，and the content of principal component decreased significantly. The proportion of the principal component in licorice pieces was not affected by the processing time and the processing temperature. The principal component and impurity in licorice pieces were sensitive to each processing factor，which can be part of the scientific evidences for completing Quality Control System of licorice.

Synthesis , Crystal Structure and Characterization of the Waugh-type Compound (NH4)2(C5H6N)4MnMo9O32·8H2O

LIU Xue-mei*, HU Zi-yi, LIU Man-fei，JIANG Fang

2015, 35(2): 153-158. DOI: 10.3969/j.issn.1000-1565.2015.02.008

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A new Waugh molybdate formulated as (NH4)2(C5H6N)4MnMo9O32·8H2O has been isolated by reacting of (NH4)6MnMo9O32·6H2O and pyridine in aqueous solution, and characterized by single X-ray diffraction, elemental analysis, IR and solid UV-Vis diffuse reflectance spectroscopy. Crystal structural analysis indicate that the title compound crystallizes in the monoclinic system with space group P21/c, a = 2.1805(17) nm, b = 1.4394(11) nm, c = 1.5707(12) nm,, β = 106.68(10)°, V = 4.7225(6) nm3, Z = 4, Dc = 3.386g cm-3, R1 = 0.0586, wR2 = 0.1831 (I>2, GOF = 1.058.

Regulation of Earthworm Lyophilized Powder on Reverse Cholesterol Transport Genes Expression in Hyperlipidemic Mice

WU Jinxia, WU Jian,SUI Siqiang, WU Hongyue, ZHANG Heying

2015, 35(2): 159-164. DOI: 10.3969/j.issn.1000-1565.2015.02.009

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Kunming mice were fed with high-level lipid feeds to establish the hyperlipidemia mice models. The mice were treated with earthworm lyophilized powder at dosages of 0.4, 0.2 and 0.1 g/kg once a day and were fed with high-level lipid feeds at the same time for 10 weeks, the mice fed only with high-level lipid feeds were as the control. The total RNA of liver was extracted, and the changes of liver Lecithin cholesterol acyltransferase and Lipoprotein Lipase gene expression were analyzed by RT- PCR. The results indicated that earthworm lyophilized powder up-regulated Lecithin cholesterol acyltransferase and Lipoprotein Lipase mRNA expression markedly, suggesting it was one of the reasons for reducing serum cholesterol in hyperlipidemia mice of earthworm lyophilized powder.

Effect of β-oligomeric acid on the mycelia growthof four edible fungi

WANG Qian, GU Feng, LIU Min，HAO Zhixin，LIN Zhihui

2015, 35(2): 165-168. DOI: 10.3969/j.issn.1000-1565.2015.02.0010

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Pleurotus eryngii ,Coprinus comatus,Ganoderma and Hericium hydnum were used as the material to investigate the effect of β-oligomeric acid on the mycelia growth of four edible fungi, by adding different concentrations to PDA medium and cultivation medium.The result showed that when the β-oligomeric acid concentration was 1.0 mL/L,in PDA medium,the mycelia grew fast,and showed significant difference from the control;when the β-oligomeric acid concentration was 2.0 mL/kg,in cultivation medium,the mycelia grew fast,and showed significant difference from the control.The concentration of 1.0 mL/L of β-oligomeric acid was the best concentration in PDA medium while 2.0 mL/kg was the best in cultivation medium for the four edible fungi.

Resources of earwigs (Dermaptera) from Beijing-Tianjin-Hebei region

SONG Yelong, REN Guodong

2015, 35(2): 169-176. DOI: 10.3969/j.issn.1000-1565.2015.02.011

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19 species of earwigs belonging to 10 genera, 5 families were recorded basing on the specimens of earwigs from Beijing-Tianjin-Hebei region deposited in the Hebei University Museum. Catalogue, distributions and collecting information were provided, and a key to species of earwigs was appended. A preliminary study on the relations of earwigs’ geographical distribution and altitude from this region was given. The results showed the species of Anisolabididae mainly distributed in low altitude area and the species of Forficulidae mainly distributed in high altitude area, and a verification basing on modeling (Maxent) was implemented by using distribution records of Forficulidae.

Effects of fire on the bird community of the airport grassland

MA Laikun，LIU Jianping ，HOU Jianhua ，ZHANG Zhengqun

2015, 35(2): 177-181. DOI: 10.3969/j.issn.1000-1565.2015.02.012

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The effects of fire on bird communities of the airport grassland was studied in November 2013 using the route survey. The results showed that: 11 kinds of birds were recorded, belonging to 5 orders and 8 families, where the dominant species was sparrow (Passer montanus), Short-toed Braun (Calandrella cheleensis) and magpies (Pica pica). Compared with the fire area, no fire area had the highest density of birds, Shannon-Weiner index value (H') and Pielou index value (E). The fire significantly reduced the density of bird community, species diversity and evenness degree (P <0.05), and bird density increased with the degree of fire reduced. But the fire did not significantly change the number of species of bird community (P＞0.05).There was more similarity in bird species composition between fire area and no fire area.

Comparison Analysis on Ranking Consensus

Li Chunguo, Li Haifeng

2015, 35(2): 182-187. DOI: 10.3969/j.issn.1000-1565.2015.02.013

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Unsupervised ranking has a big challenge that there is no standard metric to measure the ranking results. This paper tries to propose a comparison scheme for unsupervised ranking based on ranking consensus. Some metrics used in supervised ranking can be used here to measure unsupervised ranking consensus. However, these metrics are taken between ranking lists and attributes, rather than ranking lists and ranking labels. Experimental results on UCI datasets show that RPC, which is one kind of unsupervised ranking aggregation method, has the minimum Kendall Distance and Spearman Footrule Distance than the other representative unsupervised ranking methods.

Physical modeling and finite element simulation of liver biopsy based on ANSYS

ZHOU Ning,YANG Fan,SHI Ya-song,CHEN Fei,WANG Guang-lei,LIU Xiu-ling

2015, 35(2): 188-192. DOI: 10.3969/j.issn.1000-1565.2015.02.014

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In order to improve the?accuracy of operation process of?needle?puncture in?virtual?operation ,we complete finite element?simulation?of ?the?typical soft tissue --liver?puncture, based on the?experimental data?and result of ?puncture real?soft tissue. Because of?the diversity?of human tissue, and the complexity of?the biomechanical properties from?soft tissues, according to the comprehensive?consideration of the material and the?mechanical properties of the soft?tissue, in this paper, we abstracted the?liver parenchyma as Mooney-Rivlin?materials, combining with deformation mechanism of ?soft tissue by stress, complete contrasting between real experiment?and simulation?based on MATLAB. It can be seen in the comparison of the curve, stress-strain curve from simulation results by ANSYS is similar with the?real data. It verify ?the effectiveness and ?the feasibility for liver puncture experiment by finite element simulation.

Analysis and Research on Malicious Code for Client

WANG Yuxi， ZHOU Wenjun，YANG Jian

2015, 35(2): 193-198. DOI: 10.3969/j.issn.1000-1565.2015.02.015

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As the rapid development of Internet, web security issues have become increasingly prominent. The client is the focus of web applications, more and more rich client applications have provide a better experience for users, but malicious codes appear for the client. These malicious codes can be divided into two types of boot and destructive, and they attack various vulnerabilities for client systems. The quantity of these codes is growing faster, and so much variants have been or will be produced for these codes. Some codes are encrypted to hide their true purpose. Because of the concealment for malicious codes, it is difficult to directly determine the authenticity of malicious codes. Sandbox can provide a secure environment for malicious codes to expose their behavior and find the characteristics. By this way malicious codes can be killed better. It can reveal the hidden malicious code and also verify the feasibility of these detection methods through a number of virus samples tested.

Personalized Meta-Search Engine Based On Agent

SHI Jian-guo 1, XUE Yu-qian 2, SHI Yan-fang 2

2015, 35(2): 199-203. DOI: 10.3969/j.issn.1000-1565.2015.02.016

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