Table of Content

20 December 2011 Volume 24 Issue 6

  

Structures of  PI-strongly ζ^U-abundant semigroups

FU Guo-Wen, LI Gang

Shandong Science. 2011, 24(6):  1-4.  doi:10.3976/j.issn.1002-4026.2011.06.001

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We initially define a ζ^U relationship of  S, and then acquire a structure theorem of  PI-strongly ζ^U- abundant  semigroups  by normal band and the description for  C-[ζ^U-abundant semigroups.

Hamilton path of a  k-connected strong-［k+4,2］ graph

LIU Yan, WANG Jiang-Lu

Shandong Science. 2011, 24(6):  5-7.  doi:10.3976/j.issn.1002-4026.2011.06.002

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A graph  G is a strong -［s,t］ graph if there are at least t independent edges in every included subgraph of s vertices. This paper proves that if  G  is a  k-connected strong -［k+4,2］ graph with  δ≥k+1, then G has a Hamilton path or is isomorphic to (∪^k+2_i=1H_i)∨G_k,where H_i≌K₂,i=1,2…k+2，and G_k is an arbitrary graph of k vertices.

Hamilton cycle of 2-connected P₃-dominated graphs

CHEN Wei-Na, WANG Jiang-Lu

Shandong Science. 2011, 24(6):  8-11.  doi:10.3976/j.issn.1002-4026.2011.06.003

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A graph G is a P₃-dominated graph if J(x,y)∪J′(x,y)≠Φ for any pair of vertices x and y of d(x,y)=2.This paper proves that for any pair of nonadjacent vertices x and y in G,which is a 2-connected P₃-dominated graph of order n no less than 3, if 2|N(x)∪N(y)|+d(x)+d(y)≥2n-5, then G has a Hamilton cycle or G∈{K_2,3,K_1,1,3}.

［r,s,t］-T-total coloring of a graph

YANG Lin, SUN Lei

Shandong Science. 2011, 24(6):  12-14.  doi:10.3976/j.issn.1002-4026.2011.06.004

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This paper applies the restriction conditions of ［r,s,t］-coloring to spanning trees, and therefore presents a new total coloring issue. Its general upper bound is also proposed.

Research on the eigenvalues of nonlocal boundary value problems of a second-order linear differential equation

WANG Long, YAN Bao-Qiang

Shandong Science. 2011, 24(6):  15-18.  doi:10.3976/j.issn.1002-4026.2011.06.005

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This paper addresses the eigenvalues of nonlocal boundary value problems for a second-order linear differential equation and presents the existence of eigenvalues and their algebraic multiplicity.

Jacobi method for eigenvalues calculation

XU Zheng-Wen, YIN Qing-Li

Shandong Science. 2011, 24(6):  19-21.  doi:10.3976/j.issn.1002-4026.2011.06.006

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This paper addresses classical Jacobi method of eigenvalues calculation of a real symmetric matrix. It converts a real symmetric matrix into a diagonal matrix by a series of orthogonal similarity transformations, and then derives all eigenvalues and their corresponding eigenvectors. The paper presents the formulas of all orthogonal transformations, which are implemented by MATLAB programming. This provides a simple and practical calculation tool for the computation of practical problems.

Fractal analysis of particles transport properties in an open Sinai billiard

JIANG Guo-Hui, ZHANG Yan-Hui, CA Xiang-Ji, YANG Qin-Nan

Shandong Science. 2011, 24(6):  22-25.  doi:10.3976/j.issn.1002-4026.2011.06.007

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Sinai quantum billiard is an ideal model to investigate dynamic properties of a microscopic system because it can be used to simulate chaotic properties and the numerical computation is relatively simple. This paper addresses the escape of particles and numerically calculates the collision numbers in escape process with Sinai quantum billiards as a theoretical model. Results indicate the significance of initial conditions for escape. We employ a simplified box-counting approach to calculate the fractal dimensions that are corresponding to different gate voltages and different aperture widths. We also analyze the influences of gate voltage and aperture width in Sinal quantum billiards on chaotic behaviors.

Research on the bacteriostasis performance of cerium carboxylic acid complexes

MA Yu-Xiang, WANG Dang-Sheng

Shandong Science. 2011, 24(6):  26-29.  doi:10.3976/j.issn.1002-4026.2011.06.008

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We employ agar dilution method to determine the bacteriostasis activity of a carboxylic ligand and its cerium complexes to Escherichia aureus, Staplylococcus aureus and Bacillus subtilis. We also obtain their minimal inhibitory concentration (MIC). Results show that carboxylic acid and its cerium complexes have stronger bacteriostasis activity the bacteriostasis activity of its cerium complexes is higher than that of the dual ligand and lower than that of the unitary ligand.

Research advances of sol-gel technology based cordierite material synthesis

CHEN Li-Zong, XU Jing, WU Shou-Ping, TIAN Qing-Bo

Shandong Science. 2011, 24(6):  30-35.  doi:10.3976/j.issn.1002-4026.2011.06.009

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Sol-gel technology synthesized cordierite material has such positives as low thermal expansion coefficient, low dielectric properties and high chemical stability, so such material can be widely applied in electronic components and low temperature thermal radiation materials. This paper surveys the influences of technological conditions and elements addition on the synthesis and properties of cordierite materials and presents the prospect of recent research focuses.

Preparation of sinoacutine from Stephania kwansiensis by pH zone refining counter current chromatography

DONG Hong-Jing, ZHANG Yong-Qing, ZHUANG Hui-Yong, LI Jia, GENG Yan-Ling, WANG Xiao

Shandong Science. 2011, 24(6):  36-38.  doi:10.3976/j.issn.1002-4026.2011.06.010

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      We employed pH-zone refining counter-current chromatography to prepare high-purity sinoacutine from Stephania kwangsiensis. Its solvent system was composed of petroleum ether-ethyl acetate-methanol water (3:7:1:9, V/V), in which triethylamine (10 mmol/L) was added to the upper organic stationary phase as a retainer and hydrochloric acid (10 mmol/L) was added to the aqueous mobile phase as an eluter. The structure of sinoautine was identified by ESI-MS,¹H NMR and ¹³C NMR. The purity of sinoacutine determined by RP-HPLC was 99.5%. This approach has such advantages as high-efficiency and high-purity, suitable for the preparation of large amount of sinoacutine.

Separation and purification of imperatorin and isoimperatorin with supercritical CO₂ fluid extraction high-speed counter-current chromatography

LIN Xiao-Jing, GENG Yan-Ling, LIU Feng, FU Mao-Run, LIU Jian-Hua, WANG Xiao

Shandong Science. 2011, 24(6):  39-43.  doi:10.3976/j.issn.1002-4026.2011.06.011

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     This paper addressed the extraction of imperatorin and isoimperatorin from Angelica dahurica (Fisch. ex- Hoffm.) with supercritical CO₂ extraction method. Orthogonal experiments show that the optimal technological conditions of this extraction method are temperature of 60 ℃, pressure of 25 MPa , sample particle size of 40~60 mesh and 50 times amplification of a preparative supercritical fluid extraction (SFE) system. We separated and purified imperatorin and isoimperatorin with high-speed counter-current chromatography and a two-phase solvent system of 1:0.4:1.1:0.5 (n-hexane-ethyl vs. acetate vs. methanol vs. water, V/V). We also employed HPLC-DAD and MS to perform quantative and qualitive analysis for imperatorin and isoimperatorin.The purities of them were both above 99.0%.The method is convenient and fast,with a high reproducibility.

The response of PDDA/PSS films coated long-period fiber grating to humidity

LI Qiu-Shun, MIAO Fei, ZHENG Hui, MA Yao-Hong, WANG Shao-Jie, SUN Shi-Qing, SHI Jian-Guo

Shandong Science. 2011, 24(6):  44-48.  doi:10.3976/j.issn.1002-4026.2011.06.012

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       We employed electrostatic layer-by-layer self-assembly method to coat poly(diallyldimethylammonium chloride) (PDDA)/poly(sodium styrenesulfonate) (PSS) films on the surface of a long-period fiber grating (LPFG), and addressed their response to the humidity of air. Experimental results show that the central wavelengths in the transmission spectrum gradually shift to long wave with the increase of absolute humidity. A good linear relationship exists between absolute humidity and the central wavelength in the range of 25~45 ℃. A PDDA/PSS coated LPFG therefore has potential application prospect in a humidity sensor.

Application of zebrafish embryo in toxicology

WANG Xue, WANG Xi-Min, LIU Ke-Chun, HAN Li-Wen, YUAN Yan-Qiang

Shandong Science. 2011, 24(6):  49-52.  doi:10.3976/j.issn.1002-4026.2011.06.013

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      Zebrafish embryo is highly sensitive to chemical exposure and has much unique superiority over other animal models, so it is widely applied in toxicology. Besides chemical concentration, many other influences, such as chorion barrier, embryo exposure time, chemical characteristics and the interaction between different chemicals, should also be considered. Assessment methods of embryo toxicity are evolving from morphologic observation to molecular research, more emphasis on chemical mechanism. This makes zebrafish embryo have higher specificity and sensitivity in the toxicity detection.

Coomassie brilliant blue method based protein content determination in milk

SUN Shi-Qing, WANG Shao-Jie, LI Qiu-Shun, LI Xue-Mei, SHI Jian-Guo

Shandong Science. 2011, 24(6):  53-55.  doi:10.3976/j.issn.1002-4026.2011.06.014

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 We employed the dying method of Coomassie brilliant blue G-250 to determine the protein content of milk, measuring the absorbency at the wavelength of 595 nm. Experiment shows that a good linear relationship exists between the absorbency and the content of standard proteins in the range of 10~80 μg/mL. This approach has such advantages as simplicity, rapidity, good reproducibility and sensitivity, especially suitable for the determination of milk protein.

Impact of nonpathogenic binucleate Rhizoctonia spp. BNR-1 on defense enzyme activities of wheat

ZHOU Hong-Zi, CHEN Kai, ZHAO Xiao-Yan, LI Ji-Shun, ZHANG Xin-Jian, YANG He-Tong

Shandong Science. 2011, 24(6):  56-61.  doi:10.3976/j.issn.1002-4026.2011.06.015

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       We employed the strain, BNR-1, of Nonpathogenic Binucleate Rhizoctonia species to inoculate the roots of wheat and to determine the change of wheat defense enzyme activity in a certain vegetative period. Results show that the activities of peroxidase(POD), polyphenoloxidase(PPO), phenylalanine ammonialyase(PAL), chitinase and β-1,3-glucanase of wheat samples are significantly enhanced after they are processed by BNR-1. Moreover, their sharp eyespot incidence is dramatically decreased after they are processed by BNR-1.

Research advances of Jerusalem artichoke

WANG Shao-Jie, MENG Yu-Xin, SUN Shi-Qing, LI Qiu-Shun, MENG Ling-Yu, DU Yu-Guang

Shandong Science. 2011, 24(6):  62-66.  doi:10.3976/j.issn.1002-4026.2011.06.016

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      Jerusalem artichoke (Helianthus tuberosus L.)，a salt tolerant plant, plays an important role in saline land phytoremediation and the ecological agriculture development. Germplasm breeding, plant cultivation, intensive processing of tubers and straw recycling form a closed ecological economic circle. This modelis of referential significance for the development of efficient ecological economy.

Design of multi reflection transmission method based visibility measurement system

ZHAO Li, WANG Xiao-Zheng, QI Yong, FU Xiao, CAO Nai-Feng, CHEN Shi-Zhe

Shandong Science. 2011, 24(6):  67-70.  doi:10.3976/j.issn.1002-4026.2011.06.017

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    This paper presents a multi reflection transmission method based atmospheric visibility measurement system in view of such disadvantages as big area occupation and no obstruction on a long-distance lightpath for a traditional  transmission  visibility meter. The system employs an array of reflectors to construct an open air chamber and to achieve the needed optical distance, which can reserve high-precision visibility detection of transmission method and dramatically decrease area occupation. The system also employs a displacement regulator to achieve differential measurement of  atmospheric  extinction coefficient. The system has such unique advantages as strong contamination resistance capability and adjustable measurement sensitivity. Its accuracy estimation proves that its design method is feasible and a new  method  is provided for visibility measurement.

Application of Digital Filtering and Wavelet Analysis in the  Measurement of Ocean Current Velocity

LIU Meng-De, DU Li-Bin, REN Guo-Xing

Shandong Science. 2011, 24(6):  71-74.  doi:10.3976/j.issn.1002-4026.2011.06.018

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     This paper employs infinite impulse response (IIR) digital filtering and Haar wavelet analysis to suppress the noise in the original ocean current velocity measurement signal. Experiments show that this method can improve the accuracy and stability of measurement results.

A rectangular microphone array based improved GCC-PHAT  voice localization algorithm

XIA Yang, ZHANG Yuan-Yuan

Shandong Science. 2011, 24(6):  75-79.  doi:10.3976/j.issn.1002-4026.2011.06.019

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This paper improves a phase transform weighting function (PHAT) by weakening the noise cross spectrum, weighting signal tonoise ratio and applying the coherence function in view of the negative influence of the sensitivity of generalized cross correlation-phase transform (GCC-PHAT) algorithm to noise effect.  We therefore acquired an improved phase transform weighting function (IPHAT) to facilitate the more accurate estimation of time arrival difference in the effect of noise. Vast experiments prove the effectiveness of the presented algorithm.

Application of a PLC based control system in robot palletizing

WU Hao, ZHANG Yan-Fang, ZHENG Jiang-Hua, LIU Cheng-Ye, LI Qian, SUN Jie

Shandong Science. 2011, 24(6):  80-83.  doi: 10.3976/j.issn.1002-4026.2011.06.020

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      This paper presents a PLC based application instance of robot palletizing product line. An industrial computer and a PLC exist in this instance, which constitute an upper and a lower computer control system. The functionalities of the upper computer are instruction control and information management, while the lower computer is responsible for logic control. The upper computer and the lower computer communicate through a free port and a user can devise a communications protocol by himself, which make system control be more flexible and convenient. Practical application indicates that such design can implement automatic palletizing, and also has such advantages as better reliability and stability.

Application of RBAC model in a traditional Chinese medicine  information resources management platform

LI Zhen-Yang, CAO Hui, MA Jin-Gang, SONG Xiao-Rui

Shandong Science. 2011, 24(6):  84-87.  doi:10.3976/j.issn.1002-4026.2011.06.021

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     We constructed a universal traditional Chinese medicine information resources management platform with role-based access control (RBAC) technology. We introduced the concept of a role, an intermediate, into the platform and performed universal identity authentication based role access control for different resources. We also defined each sub-module as a database role which had the same authority as a sub-module, and then distributed these roles to all users. The platform is secure, easy to be managed, and has good transferability and scalability. It therefore receives better favor from many users.

The research and application of information extraction in the field of traditional Chinese medicine

LAI Jian-Mei, CAO Hui, MA Jin-Gang

Shandong Science. 2011, 24(6):  88-91.  doi:10.3976/j.issn.1002-4026.2011.06.022

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       This paper summarized the application and current research situation of the technology of information extraction in the area of electronic medical record, medical materials and medical network resourse. Thus we drew the conclusion that the technology can help to make full use of Chinese medicine and can contribute to the development of modern Chinese medicine. However, the current status of this technology is still in the theoretical and experimental period. Therefore, it is quite necessary to improve the practicability of the system, to construct an automatic decimation rule, and to realize the automatic information extraction.

 

An Elman neural networks based ranging model for wireless sensor networks

HAN Qing-Yu, LI Yuan, GONG Hong-Cai, GUO Qiang

Shandong Science. 2011, 24(6):  92-95.  doi:10.3976/j.issn.1002-4026.2011.06.023

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     We collect the received signal strength values of a node at different positions in a wireless sensor network. We then employ Elman neural networks to construct a mapping model relationship between received signal strength and radio wave propagation path distance. We therefore can train such neural networks with the collected signal strength before detect distance with the well trained neural networks. Experimental results show that this approach has better ranging capability.

Face automatic detection and cutting system for online registration photograph

LIU Fang-Mei, YANG Yun

Shandong Science. 2011, 24(6):  96-100.  doi:10.3976/j.issn.1002-4026.2011.06.024

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     This article designed a face detecting and cutting system based on skincolor space and integral projection. Firstly, this article set skin color model from the input image. In this step, a part of the skin area sample is selected,upper limit and lower limit of chroma threshold by experimental statistics is determined, and then the skin area is cutout by “double threshold” methods. Secondly, morphological process binarization image is carried out. Finally, integral horizontal projection and vertical projection are made, the skin area is determined by locating eyes, and the image is cut in accordance with the requirements. In condition that input images are limited to “contain single bareheaded face, face clear, expression natural and solemn”, our detection accuracy is above 96%. This system has strong practicability, and is easy to operate.