Table of Content

20 October 2012 Volume 25 Issue 5

  

Content

Neighborhood conditions for maximally and super-local-edge-connected digraphs

GAO Jing-Zhen, LYU Min

J4. 2012, 25(5):  1-5.  doi:10.3976/j.issn.1002-4026.2012.05.001

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This paper presents neighborhood conditions for maximally localedgeconnected and super-local-edge-connected digraphs and bipartite digraphs. Different examples show that these conditions are most possible.

Existence of positive solutions of a type of beam equation boundary value problems

WUXiang-Yun

J4. 2012, 25(5):  6-10.  doi:10.3976/j.issn.1002-4026.2012.05.002

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This paper addresses the existence of positive solutions for a type of fourth-order beam equation boundary value problems based on function-typed fixed point theorem of cone expansion and compression. The unique characteristic is that its nonlinear term depends on all lower-order derivatives.

Existence of the periodic solution of a neutral integro-differential equation with infinite delay

WANG Feng-Su, LIU Yan-Sheng

J4. 2012, 25(5):  11-14.  doi:10.3976/j.issn.1002-4026.2012.05.003

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This paper addresses the existence of periodic solution of a neutral Volterra integro-differential equation with infinite delay by matrix measure and Schauder fixed point theorem. It generalizes the results in literature.

Existence of two positive solutions of singular semipositone boundary value problems

HOU Wen-Ying, GUO Huan, LU Hui-Qin

J4. 2012, 25(5):  15-17.  doi:10.3976/j.issn.1002-4026.2012.05.004

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This paper addresses a class of singular semipositone boundary value problems and obtains the existence of at least two positive solutions with the fixed point theorem of cones under the conditions of semipositone of nonlinear terms and the singularity at the end points.

Simultaneous determination of Sn, Pb, Fe, Zn in copper ally by ICP-AES

ZHANG Hong-Xia, WU Qin, XU Ting-Ting, YAN Na, LYU Jing-Yan, LI Jing-Chao

J4. 2012, 25(5):  18-21.  doi:10.3976/j.issn.1002-4026.2012.05.005

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We applied ICP-AES to the determination of Sn, Pb, Fe and Zn in copper ally. We obtained the dissolving method of the four metals by experiments, which were employed to prepare standard reserve supply liquid. We also analyzed the effect of acid on the formation of metastannic acids precipitation and optimized the parameters of the instrument and its analysis spectral line. The precision and accuracy of the analytic results of the standard samples were satisfactory, as compared with the standard sample value.

CFD based flowfield analysis of an expendable bathythermographs probe

LIU Meng-De, CHEN Wei-Shan, LIU Jie

J4. 2012, 25(5):  22-24.  doi:10.3976/j.issn.1002-4026.2012.05.006

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We constructed a computational fluid dynamics (CFD) model for an expendable bathythermograph (XBT) probe based on its structure and and the software of FLUENT and performed grid division and boundary conditions determination. We also analyzed the velocity field profile outside of a XBT, especially that near its head and tail. Results show that the designed probe structure is reasonable and favorable for the stability of a XBT under seawater. This paper can provide reference for the further optimization of the probe structure of a XBT.

Research on the computational approach of falling depth of an expendable bathythermograph probe in seawater

CHEN Wei-Shan, LIU Meng-De, LEI Zhuo

J4. 2012, 25(5):  25-29.  doi:10.3976/j.issn.1002-4026.2012.05.007

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We derive the formula of the falling depth and related parameters of an expendable bathythermograph (XBT) probe based on kinematic analysis to calculate the falling depth of an XBT probe in seawater. We also analyze the impact of the weight error of a XBT probe on the calculation result of its falling depth. Experiment shows that the average error of the falling depth is within 2%, as compared with a standard conductancetemperaturedepth instrument.

omparison of allelopathic effect of Salvia miltiorrhiza Bunge f. alba and Salvia miltiorrhiza on Scutellaria baicalensis

ZHOU Jie, WANG Xiao, LIU Jian-Hua, LIU Wei, LI Jia, DAI Yu-Lu

J4. 2012, 25(5):  30-34.  doi:10.3976/j.issn.1002-4026.2012.05.008

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We employed indoor Petri dish bioassay analysis to determine the allelopathic effect of seeds and seedlings of Scutellaria baicalensis Georgi impacted by different concentration (0.1, 0.5, 1.0, 5.0 g/L) and one year or two years old Salvia miltiorrhiza Bunge f. alba C.Y.Wu et H.W.Li and Salvia miltiorrhiza Bunge. Experimental results show that aqueous extracts of rhizome of S. miltiorrhiza Bge. f. alba and S. miltiorrhiza exhibit similar effects on seed germination rate, germination index and vigor index of S. baicalensis. Lower concentration aqueous extracts of rhizome can promote seed germination while higher concentration aqueous extracts hinder germination (especially for the concentration of 5 g/L). The absolute value of allelopathic index of S. miltiorrhiza Bge.f. alba to seed germination rate is less than that of S. miltiorrhiza. The aqueous extracts of rhizome of S. miltiorrhiza Bunge f. alba and S. miltiorrhiza show similar impacts on seedling height and root length of S. baicalensis. Higher concentration aqueous extracts of rhizome significantly restrain fresh weight of seedlings. The absolute value of allelopathic index of S. miltiorrhiza Bge. f. alba to seedling height and fresh weight of S. baicalensis is less than that of S. miltiorrhiza. All aqueous extracts of rhizome of S. miltiorrhiza Bge. f. alba and S. miltiorrhiza exhibit promotion effect of lower concentration and restraint effect of higher concentration to the seed germination and seedling growth of S. baicalensis. Moreover, the allelopathic potency of S. miltiorrhiza Bge. f. alba to S. baicalensis is less than that of S. miltiorrhiza. The paper therefore can provide scientific basis for the optimization of compound planting pattern.

Comparisons of growth and quality of different harvest stages of improved variety of Lonicera japonica Thunb.

LIU Wei, ZHENG Zhen-Jia, ZHOU Jie, WANG Dai-Jie, WANG Xiao, LIU Jian-Hua, LI Sheng-Bo

J4. 2012, 25(5):  35-38.  doi:10.3976/j.issn.1002-4026.2012.05.009

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We address the content change of the active substances in their different growth stage with three improved varieties of Lonicera japonica Thunb. of the stages of Sanqing, Erbai, Dabai, Yinhua and Jinhua as objects. Experimental results show that the yield of Dabai stage is the highest, whose value is 9.68 g, 6.69 g and 9.86 g. Drying rate of Sanqing stage is the highest while the content of soluble sugar is the highest in Dabai stage. The contents of chlorogenic acid and luteoloside acid are the highest in Sanqing stage and then gradually decrease with the growth of flower. The contents of chlorogenic acid and luteoloside acid of Lonicera japonica (Yatehong LSB) are the lowest, 4.22% and 0.16%. The content of luteoloside of Yinhua stage gradully increases with the growth of flower while the content of the chlorogenic acid is the highest in Yinhua stage. Difference is not significant for the two active substances in Lonicera japonica (Yate LSB) and Lonicera japonica (Yateliben LSB). The content change of volatile oil is contrary to that of chlorogenic acid and luteoloside acid. The content of volatile oil, 1.40%, is the highest for Lonicera japonica (Yatehong LSB), and no significant distinction exists in the other two improved varieties. We discover that the best harvest stage is Erbai stage.

A survey of welding technology of magnesium alloys

WANG Xu-Ke, ZHOU Ji-Xue, ZHAN Cheng-Wei, ZHAO Dong-Qing, LI Wei-Hong, TANG Shou-Qiu, YANG Yuan-Sheng

J4. 2012, 25(5):  39-46.  doi:10.3976/j.issn.1002-4026.2012.05.010

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Mature and reliable welding technology is an important guarantee for wide applications of magnesium alloys. This paper surveys the research advances in welding technology of magnesium alloys and analyses its disadvantages. Every welding technology has its own positives and negatives. Its selection should be based on its own characteristics and the specific requirements of the welding components. Tungsten inert gas welding, friction stir welding and laser beam welding have tremendous application potency, as compared with other welding technologies of magnesium alloys.

Research on the stability evaluation of underwater wet manual arc welding

WANG Fang, JIA Chuan-Bao, DU Yong-Peng, YIN Zi-Qiang, GUO Ning, HAN Yan-Fei, HAN Gui-Hai

J4. 2012, 25(5):  47-52.  doi:10.3976/j.issn.1002-4026.2012.05.011

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This paper addresses some factors affecting the stability of underwater wet manual arc welding process based on underwater characteristics to solve the problem that the stability of arc burning and droplet transition is easy to be interfered. We survey welding process stability evaluation methods before obtain a statistical graphics method to analyze the electrical parameters of the welding process and the related time parameters. It describes a welding process more intuitionisticly and accurately. It is therefore quite significant for the research on new underwater wet welding materials, stability improvement of the welding process and quality of welding seam and the generalized applications of underwater wet welding technology.

A control system for automatic water sampling of a water quality monitoring buoy

YU Bing-Liang, Hou-Guang-Li, TANG Yong-Zuo, REN Guo-Xin, SUN Ji-Chang, CHU Dong-Zhi, MA Ran

J4. 2012, 25(5):  53-57.  doi:10.3976/j.issn.1002-4026.2012.05.012

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We designed a control system of automatic water sampling for water quality monitoring buoy. The system includes water pumping, water storage and allocation, waste water collection and a control unit. It has such functionalities as water sample acquisition, filtering and distribution, waste water collection and discharge and pipes flushing. We selected electronic components and materials suitable for marine environment based on performance parameters, control logic and specific structures of each part. System test shows that it is reliable and can satisfy reality requirements. It therefore can be widely applied to other cases of automatic water sampling.

Design of a SH-1 assembled big buoy

WAN Xiao-Zheng, FAN Xiu-Tao, ZHOU Wei, CHEN Shi-Zhe, LIU Shi-Xuan

J4. 2012, 25(5):  58-62.  doi:10.3976/j.issn.1002-4026.2012.05.013

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We design a big assembled buoy of 6 m diameter in view of the weak viability of a big overall oceanographic data buoy and the inconvenience of its manufacture and transport. We also employ Ship Static calculation method to determine such basic parameters of the buoy as molded depth of 2.2 m and height of gravitational center of 0.9 m. We then check the stability criteria of the assembled buoy based on the ship stability specification and obtain an assembled buoy satisfying the requirement of usage. The design provides a rational basis for the controllability of buoy manufacture quality.

Implementation of data communication between a GPS receiver and a ship meteorologic instrument

CHU Wei-Xian, SHAO Bao-Min, WANG Jian-Xiao, QI Sui-Ping, WANG Dong-Ming

J4. 2012, 25(5):  63-66.  doi:10.3976/j.issn.1002-4026.2012.05.014

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A ship meteorologic instrument needs true wind speed and true wind direction to determine the ship direction and ship velocity. We design an acquisition program of GPS navigation data with C language and development enviroment of Turbo C2.0, and further implement data communication between a GPS receiver and a ship meterorologic instrument. Experiment shows that the program is stable and reliable and can be applied to other application systems.

 

Application of particle swarm optimization based BP neural network in 3D animation modeling evaluation

SUN Xiao-Hong, DU Long-An, LIU Hong, ZHANG Xiao-Wei

J4. 2012, 25(5):  67-72.  doi:10.3976/j.issn.1002-4026.2012.05.015

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This paper constructs a 3D animation modeling evaluation model with Particle Swarm Optimization (PSO) algorithm and BP network in view of the issues of easy falling of standard BP neural network into local minimum and the global searching of PSO. We apply the model to the generation of 3D animation modeling. It fully utilizes the characteristic of global searching of PSO and optimizes the weights and thresholds of BP network, which makes mean-square error less than or equal to the preset value. Experimental results show that the approach improves the convergence rate and convergence precision of BP network based on the guarantee of the global optimization result. It has preferable evaluation capability in the evolution of 3D animation modelings and improves the quality of 3D animation modelings.

Design of a PBOC2.0 oriented smart card operating system

HU Yun-Xiao, YANG Bo, SUN Tao, GUO Yan-Hai

J4. 2012, 25(5):  73-77.  doi:10.3976/j.issn.1002-4026.2012.05.016

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This paper abandons the design of memory card and applies combination design of file system and security access mechanism and the design method of modularization to satisfy the market requirement for a smart card. We add binary files and log files into the file structure and perform reliability storage design. We also design and implement the functionalities of application firewall and a multi-purpose card. The design method increases the reliability, applicability and flexibility of a smart card.

Design of virtualization based application services monitoring software

WU Jing, YANG Bo, SUN Run-Yuan, MA Kun

J4. 2012, 25(5):  78-82.  doi:10.3976/j.issn.1002-4026.2012.05.017

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This paper presents a cloud computing platform oriented application service monitoring software based on the virtualization of application services with the existing monitoring methods and technologies of virtualization, port scanning and page parsing and the information service platform of university key subjects. The software has such characteristics as crossplatform and scalablity, and can provide a stable and accurate application service monitoring for existing cloud computing platform.

The preparation of resorcinolformaldehyde resin and its application in rubber industry

WANG Feng, LI Yuan-Jie, ZHANG Fang-Zhi, XUN Yong

J4. 2012, 25(5):  83-87.  doi:10.3976/j.issn.1002-4026.2012.05.018

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Resorcinolformaldehyde resin is a usual adhesive agent in rubber industry to enhance the adhesion between rubber and steel wire or fabric cord. Alkylation modification is an existing main modified method of resorcinolformaldehyde resin. The alkyl-resorcinol-formaldehyde resin can effectively solve the smoke issue in rubber production and improve the adhesion strength between rubber and cord. The future research will focus on improving adhesion and vulcanizing properties of rubber compound with alkylresorcinolformaldehyde resin based on solving smoke issue.

Analysis of fatty acids in fatty oil of Euphausia superba

LI En-Xia, XU Na, LI Fu-Wei, ZHAO Mei, WANG Xiao-Dong, ZHANG Chong

J4. 2012, 25(5):  88-91.  doi:10.3976/j.issn.1002-4026.2012.05.019

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We extracted fatty oil from Euphausia superba by supercritical ethanol extraction, and the extraction rate was 6.14%. We determined fatty acids in fatty oil of Euphausia superba by GC after saponification and methyl esterification. We therefore identified 21 compounds altogether. The major components were myristic acid, hexadecanoic acid, oleic acid, eicosapentenoic acid (EPA) and docosahexaenoic acid (DHA), whose relative contents were 9.25%, 24.35%, 18.25%, 20.28%, and 11.17%. 0.68% odd fatty acids also existed in fatty oil of Euphausia superba.

Research on improved Ant Colony Algorithm based optimization of container handling sequence problem

DONG Sheng-Wei, JIA Yuan-Hua, ZHAO Xue-Jing

J4. 2012, 25(5):  92-97.  doi:10.3976/j.issn.1002-4026.2012.05.020

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We apply improved Ant Colony Algorithm to combinatorial optimization problem in order to shorten port waiting time and improve port efficiency. We initially constructed a mathematical model based on flexible job shop scheduling theory and the real situation of the ship and container crane. We then updated the pheromone of every path based on new updating rule to jump out of its local optimism through dynamically improving pheromone volatility and pheromone intensity. We eventually performed simulation and steps analysis with C#.NET to verify its effectiveness. Experimental results show that it can optimize the sequence of container loading and unloading and shorten operation time.

Research on gray fuzzy clustering based urban and rural road passenger transport integration

TONG Jian, JIA Yuan-Hua

J4. 2012, 25(5):  98-103.  doi: 10.3976/j.issn.1002-4026.2012.05.021

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This paper presents gray fuzzy clustering model based theory and idea to make the development area of division of urban and rural road passenger transport integration suitable for local traffic and economic characteristics. We combine grey association analysis method and clustering analysis method together through an improved bi-level programming model. We perform case study with MATLAB to verify its feasibility. Division results demonstrate that gray fuzzy clustering method can compensate the disadvantages of traditional grey association analysis method and clustering analysis method and can provide reference for policy enactment of urban and rural road passenger transport integration regional development.

Research on pollution-free process of avermectin fermentation wastes

ZHANG Guang-Zhi, LI Ji-Shun, YANG He-Tong, WEI Yan-Li, HU Jin-Dong, REN Yan, LIU Wei

J4. 2012, 25(5):  104-108.  doi:10.3976/j.issn.1002-4026.2012.05.022

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We inject Bacillus stearothermophilus AZ11 into avermectins fermentation wastes, and perform compost ferment and avermectins degradation so as to compost maturity of manure. Results show that the Bacillus strain can increase the degradation of avermectin and decrease compost time significantly. The optimal experimental conditions are water content of the compost of 70%, AZ11 inoculation of 5‰, ventilation time of 5 min every 12 h, completion of composting process in 24 d. Avermectins degradation rate is then over 98.7%.