Table of Content

20 February 2011 Volume 24 Issue 1

  

Content

Construction of Shandong coastal monitoring buoy network

DU Li-Bin, WU Cheng-Xuan, HE Hai-Qing, QU Jun-Le

J4. 2011, 24(1):  1-5. 

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         We construct a coastal monitoring buoy network based on the Shandong specific coastal geographic environment. It covers such area as distant sea, offshore and coast and extends from coast to 60 miles away from coast. We also perform its optimization. It can detect ocean pollution, red tide, sea water quality, and effectively monitor storm tide and typhoon.

Application of one dimensional wavelet signal processing in the measurement of seawater total organic carbon

CHENG Yan, REN Guo-Xing, CHENG Wen

J4. 2011, 24(1):  6-9. 

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        This paper presents a wavelet transform based signal noise reduction algorithm for the signal denoising problem of the determination of seawater total organic carbon. This Visual C++ implemented algorithm decomposes the collected signal, removes the high frequency signal components and reconstructs back to the noise reduction signal. Experiments show that the algorithm is simple and effective and can achieve good noise reduction effect.

Hardware design of ARM architecture based TOC online seawater analyzer

MA Ran, CHENG Yan, REN Guo-Xing, LIU Yan

J4. 2011, 24(1):  10-15. 

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        We developed a chemiluminescence based total organic carbon (TOC) online seawater analyzer for the requirement of ocean ecological investigation to TOC. This instrument is based on SOC technology, and includes an ARM instruction set based microprocessor S3C2440 and an embedded Windows CE operating system. A vast number of online tests show that this analyzer can guarantee not only measurement precision but also higher measurement speed, so it has better application potency.

A survey of keyhole plasma arc welding

LUO Fei, JIA Chuan-Bao, XUE Liang-Chang, CHENG Shuang-Qiu, ZHANG Lin-Lin, WANG Fang

J4. 2011, 24(1):  16-21. 

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         This paper surveys the characteristics, classification and the parameters matching for the technology of keyhole plasma arc welding. Keyhole plasma arc welding can cause a special keyhole, with which welding speed, workpiece thickness and welding efficiency will be all increased significantly. It can be generalized to constant, pulsed, variable polarity and special plasma arc welding, so it can satisfy special requirements of many different industries. This paper is quite significant to guide welding practice and increase productivity and the quality of welding joints.

UVInduction and culture optimization for Nitzschia closterium

ZHANG Xin-Jian, REN Yan, HUANG Yu-Jie, SONG Li-Lu, LI Hong-Mei, ZHAO Xiao-Yan, ZHANG Guang-Zhi, YANG He-Tong

J4. 2011, 24(1):  22-27. 

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        We obtained a strain of oilrich [WTBX]Nitzschia closterium[WTBZ] (BC6) through UVinduction. We further investigated the effects of different culture conditions such as temperature, irradiance, pH value, salinity and nitrogen concentration on its growth. The OD680 and growth rate were determined every two days. Experimental results show that the optimum culture conditions are temperature of 20 ℃, pH value of 7.5, irradiance of 54 μmol·m^-2·s^-1, NaNO₃ concentration of 105 mg·L^-1and NaCl concentration of 27 g·L^-1. Its highest cell density can reach 1.69×10⁶/mL,  2.2 times higher than that of nonoptimization, under these optimal conditions.

Bioindication of bryophytes to environmental quality of Jinan

REN Zhao-Jie, HUANG Zheng-Li, LI Lin, ZHAO Zun-Tian

J4. 2011, 24(1):  28-32. 

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         We investigated bryophyte from ten different sampling sites and made a comparison among their species.  We altogether collected 365 specimens, which belonged to 62 species, 33 genera and 15 families.Gymnostomum calcareum, Weisia planifolia and Physcomitrium eurystomum were the prevalent species. They can serve as the primary plants for the ecological restoration of an industrial area.

New method for isolation and culture of lichenized fungi

QIU Zhen-Lu, WANG Hai-Ying, ZHAO Zun-Tian

J4. 2011, 24(1):  33-35. 

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         This paper presented a new method for isolation and culture of lichenized fungi and lichen endophyte fungi. We directly selected medulla mycelium for cultivation with PDA nutrition medium. The growth rate of the community of lichenized fungi was 80.43%, while the contamination rate was only 7.14% under the conditions of nutrition medium of 25℃ and 14 days later. The superiority of this method was therefore simplicity, highefficiency and low contamination rate.

Effects of PEG stress on seed germination and seedling physiology of  Malus robusta

WU Li-Yun, CAO Bang-Hua, SHAO Wei, XIE Wen-Ke, LI Tao, XU Dan

J4. 2011, 24(1):  36-39. 

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       We investigated the influences of drought stress on the seed germination and seedling physiology of Malus robusta, which was simulated with different concentrations of PEG solution. Results show that the relative germination rate, germination potential, germination index and vigor index of the seeds processed with PEG decrease with the increase of stress intensity. SOD activity of the seedlings increases with the increase of PEG concentration, while POD activity demonstrates the opposite tendency. MDA and proline content increase with the increase of stress intensity. This indicates that higher PEG concentration cause worse damage to the seedlings of Malus robusta.

Construction of a stable composite microbial system of a group of cellulosedegrading bacteria under constant temperature and its functionalities

ZHANG Rui-Qing, SUN Yan-Xia, YUAN Tang-Yu, ZHANG Wei, ZHAO Ming

J4. 2011, 24(1):  40-44. 

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          We obtained 23 strains of cellulosedegrading bacteria with rapid growth, big transparent ring and stable performance, which were isolated and screened from natural decay residues.We then acquired a stable composite microbial system of cellulosedegrading bacteria under constant temperature constituted by 14 effective and stable cellulosedegrading bacteria through determination of cellulosedegrading rate and backscreening. This system has 40. 7% stable wheatstraw degrading rate in 96 hours under constant temperature. 

Influence of collision energy on the dynamics characteristicsof the elemental reaction He+H₂⁺(v=3,j=1)

ZHAO Lian-Qing, LIU Xin-Guo, ZHANG Qing-Gang

J4. 2011, 24(1):  45-50,60. 

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       We theoretically investigated the cubic dynamics characteristics of the reaction He+H₂⁺ with quasiclassical trajectory (QCT) method and a new potential energy surface (PES). Results show that integral section fits well with the experimental results. Product HeH⁺ demonstrates different rotational polarization characteristics for different collision energies. Its rotational angular momentum vectors j′ are not only aligned, but also oriental. Product HeH⁺ tends to be scattered forward with the increase of collision energy.

Transport properties of two dimensional circular billiards in weak magnetic field

BIAN Hong-Tao, ZHANG Yan-Hui, JIANG Guo-Hui, XU Xue-You, LIN Sheng-Lu

J4. 2011, 24(1):  51-54. 

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         We investigate the transport properties of a open circular quantum billiard in weak magnetic field with a semiclassical theory. We also obtain the elements of transmission matrix with semiclassical approximation Green′s function and eigenfunctions. We further calculate classical trajectories of an electron, and compare the quantum spectral peak positions of transmission matrix elements with the length of electronic classical orbit．Results show that the peak positions are well consistent with the orbit length. This demonstrates that the heterojunction is a good theoretical model to describe the microstructure of electron conduction.

Effects of sputtering time on the structure and morphology of β-FeSi₂ film made with pulsed laser deposition

MA Yu-Yang, LIU Ai-Hua, LIU Mei, XU Shi-Cai, HOU Juan, GUO Jin-Jin

J4. 2011, 24(1):  55-60. 

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        We made uniform single phase β-FeSi₂ films on Si (100) substrate with a Nd:YAG pulsed laser of 1064 nm (output wavelength), pulsed laser deposition (PLD) and thermal annealing process. We further investigated the structure and surface morphology with atomic force microscope (AFM),scanning electron microscope (SEM) and X-ray diffraction (XRD) method. Experimental results show the crystallization degree, size and shape of the grains and surface roughness are all regularly changed with the increase of sputtering time. We discovered that 40 minutes is the optimal sputtering time under the present experimental conditions after comparing the different sputtering time.

Sufficient conditions of a λ₄- optimal and super -λ₄ graph

GAO Jing-Zhen, MA Yu

J4. 2011, 24(1):  61-64. 

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      Let G be a finite, simple and undirected graph and U be its edge subset If G - U is disconnected and each component of G - U contains at least four vertices, then such an edge set is 4-restricted edgecut of G. The 4-restricted edgecut U whose cardinality is the smallest is called a λ₄- cut, and its cardinality is called the 4-restricted edgeconnectivity, denoted by λ₄=λ₄(G) . G is  λ₄- optimal if λ₄=ξ₄(G)  and super -λ₄  if every λ₄-cut isolates a connected subgraph of order 4. This paper presents some sufficient conditions for a λ₄- optimal and super -λ₄ graph with the neighborhood intersection condition.

Cycle extensibility of a almost locally connected ［4,2］-graph

ZUO Cheng-Long, WANG Jiang-Lu

J4. 2011, 24(1):  65-67. 

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          A graph G is a［s,t］- graph if there are at least t edges in its every included subgraph of s vertices.This paper proves that any cycle C satisfying 5≤｜C｜≤｜G｜ is extendable in a almost locally connected ［4,2］- graph. 

Hamilton cycles of 2-connected ［4,1］-graphs

ZHANG Wei, WANG Jiang-Lu

J4. 2011, 24(1):  68-71. 

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       A graph G is a ［s,t］- graph if there are at least t edges in every included subgraph of s vertices. This paper proves that the sufficient and necessary condition of a 2-connected ［4,1］- graph to be a Hamilton cycle is that it is not isomorphic to three kinds of specific graphs.

Neural network based assessment of pharmacological effects of traditional Chinese medicine

HOU En-Guang, LI Shu-Bin, LI Ke, DING Xiao-Yan, LV Ling, LIU Qing, ZHAO Bo-Nian, XU Zong-Yuan

J4. 2011, 24(1):  72-76. 

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         How to impersonally and effectively assess the pharmacological effects of traditional Chinese medicine (TCM) is one of the difficulties confronting the modern research of TCM. This paper establishes a neural network model for the assessment of pharmacological effects of traditional Chinese medicine Huang Qin. We train this model with massive data and adjust its model parameters. We therefore construct a union effect assessment system for the traditional Chinese medicine Huang Qin. Test results show the advances and reliability of this method.

Application of least squares curve fitting in wavelength interrogation of fiber Bragg grating

ZHAO Lin, LIU Tong-Yu, NI Jia-Sheng, SONG Zhi-Qiang

J4. 2011, 24(1):  77-80,96. 

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        We perform curve fitting with the principle of least squares, which is based on the analysis of the wavelength detection of spectrum interrogation center. We construct an optimal generic polynomial spectrum fitting model with experimental data. This model is further applied to the curve fitting and simulation of individual central wavelength of acetylene absorption spectrum. Experimental results show that this model can reduce the drift of central wavelength and increase the accuracy of detection.

A nonsubsampled contourlet transform based adaptive watermarking algorithm for image authentification

LIU Dong-Yan, SUN Ji-Chang, LIU Yan, TANG Yong-Zuo

J4. 2011, 24(1):  81-85. 

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        We present a semifragile nonsubsampled contourlet transform (NSCT) based watermarking algorithm for image authentification. We embed watermark in the singular values (SVs) of the blocks within lowfrequency subbands of NSCT by an adaptive quantization method. Watermark extraction is available only with a key constructed by chaotic signal initial value and quantization parameters. Subbands of individual scale and individual direction all have the same size as those of the original image. This algorithm can improve the tampering localization capability without causing remarkable manmade trace. Experimental results show that this algorithm is robust to JPEG compression but extremely sensitive to malicious operations.

Application of image color management in typesetting software

ZHANG Dong-Sheng, YIN Jian-Min, ZHANG Yu-Hong

J4. 2011, 24(1):  86-88. 

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        We structurally analyze the color profiles of a device and employ ICM2.0 in Windows to show the real image on a screen. We therefore implement the real consistency of the color of an image between typesetting software and image editing software.

 

A B/S structure based clinical database management system for orthopedics of traditional chinese medicine

LI Chuan-Li, CAO Hui, MA Jin-Gang, HU Zhi-Shuai

J4. 2011, 24(1):  89-92. 

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         We develop a B/S structure based clinical database management system for Orthopedics of traditional Chinese medicine in view of the status quo of not enough utilization of vast amount of orthopaedics and traumatology literature and clinical data. This system can collect Orthopedics of traditional Chinese medicine related clinical data and some important literature and can effectively analyze, summarize and manage them.

An improved variable neighborhood search based solution to the k-card inality tree problem

DONG Wei

J4. 2011, 24(1):  93-96. 

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        This paper applied variable neighborhood search (VNS) algorithm to the solution ofk-card problem. This paper also defined a new neighborhood structure for the solution space, and improved the algorithm.  This increased the search speed of feasible solutions in the neighborhood, and improved the quality of the approximate solutions. This algorithm was compared with the present neighborhood structure based VNS algorithm. Experimental results show its effectiveness for thek-card problem.

Mechanism design and kinematics analysis of a four axis stacking robot

SUN Jie, LI Qian, LIU Guang-Liang, GE Zhao-Bin, LI Xiang-Dong

J4. 2011, 24(1):  97-101. 

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            We design a fouraxis balance hoist based palletizing robot to satisfy the requirement of logistics automation to robot palletizer. We analyze the kinematic characteristics for the arms of the robot and further obtain an optimal equation of its linkage mechanism. Experimental results show that such a robot can satisfy the requirement of logistics automation.

Implementation of data communications in the control system of a .NET based completely automatic tester

ZHANG Yan-Fang, ZHENG Jiang-Hua, LIU Guang-Liang, LIU Cheng-Ye, LI Qian

J4. 2011, 24(1):  102-105. 

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         We implement serial communications between PC and DVP Series PLC in the control system of a completely automatic tester with the internal SerialPort class of C# and .NET based C#. This can increase the flexibility of serial communications program design and the reliability of data transmission through serial ports. Application results show that the transmitted data is accurate and reliable and the program runs stably.

Research on steel tubes blind ends reduction in eddy current fault detection through type coil round

ZHAO Hong-Xian, LI Qing-Zhuo, SUN Ji-Hua, HAN Xiao-Hua, DONG Xin, MENG Ling-Hua, HUANG Xu-Ping, WANG Bei, MA Jian

J4. 2011, 24(1):  106-108. 

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          We reduce the blind ends of steel tubes in eddy current fault detection by the automatic control over the gain of a preamplifier and performance improvement of a bandpass filter for the characteristic of strong signal generated at the end of a steel tube. We can detect the steel pit at the 103 mm away from one end of a steel tube of diameter 168 mm and thickness 6 mm.