Shandong Science

Heave motion performance of ocean data buoy in frequency domain

WANG Hua-jie, SUN Jin-wei, SHAO Meng, FAN Xiu-tao

SHANDONG SCIENCE. 2016, 29(6): 1. doi:10.3976/j.issn.1002-4026.2016.06.001

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As an important design parameter of ocean data buoy, wave following characteristic affects the accuracy of wave measurement. We calculate wave excitation force and such hydrodynamic coefficients as added mass and wave damping coefficient of disc buoy with three dimensional potential flow theory, and heave motion of free floating buoy based on single degree of freedom motion equation. We also address heave motion of two moored buoys integrated with the impact of mooring vertical spring constant on buoy heave motion. We discover that the buoy with threemeter diameter has better wave following performance than that with tenmeter diameter and that anchor chain has more significant impact on heave amplitude of threemeter diameter buoy than that of tenmeter diameter buoy. The result is very important for parameter correction of wave sensors.

Numerical simulation of wave energy convertor of ocean data buoy

ZHAO Huan-yu, SUN Jin-wei, FAN Xiu-tao, GUO Fa-dong, ZHANG Ji-ming, CHAI Hui

SHANDONG SCIENCE. 2016, 29(6): 9-18. doi:10.3976/j.issn.1002-4026.2016.06.002

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Power supply is one of the key issues in ocean data buoy. We address the feasibility of wave energy convertor of ocean data buoy with buoy body as wave energy absorption system, gear and rack as power takeoff system and permanent magnet wind turbine and rectifier voltage regulator module as power output system, based on numerical simulation and the existing technical parameters of ocean data buoy. Analysis of calculation results shows that wave buoy body can satisfy installed capacity of 500 W threephase AC permanent magnet synchronous generator if no damping. Generator output voltage of theoretical calculation can also meet the charging requirement of ocean data buoy battery of 14 V.

Design of ocean interference detection system

CHENG Yan,WU Bing-wei, ZHANG Ying-ying

SHANDONG SCIENCE. 2016, 29(6): 19-23. doi:10.3976/j.issn.1002-4026.2016.06.003

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To improve marine ecological field detection sensitivity and precision and lower detection limit, we analyze amplitudefrequency characteristics of interference signals and grasp their frequency domain characteristics for uniform amplitudefrequency property of seawater detection signal. Through the filtering of seawater detection signal, we get authentic monitoring data. The approach is stable and reliable, and can provide reference for development and application of marine ecological field detection sensors.

Case analysis of wind and wave for cold wave and thunder storm weather

ZHANG Rui-guang, XU Xian, YANG Hong-mei, LI Zhong-lin, SUN Ke-qu

SHANDONG SCIENCE. 2016, 29(6): 24-29. doi:10.3976/j.issn.1002-4026.2016.06.004

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We addressed the impact of cold wave and thunder storm weather on offshore wind power, sea state and sea wave of Lianyungang sea area based on cold wave on December 21, 2008, and thunder storm on May 30, 2010. For cold wave weather, sea state and wave gradually increased with the increase of wind speed. For thunder storm weather, sea state and wave rapidly increased with the quick increase of wind speed. Thunder storm caused more prompt variation of sea wave than cold wave, difficult to judge and prevent. For cold wave weather, we employed Wilson formula to estimate wave height of sea wave, and numerical forecasting to simulate the calculation of wave height of sea wave. This is more accurate than practical observed value, less than 10% error.

Research advances on chemical constituents of leaves from Lonicera japonica Thunb.

ZHU Heng, CHEN Jing-xian, WEN Lei, WANG Zhao-ping, JING Feng, WANG Dai-jie

SHANDONG SCIENCE. 2016, 29(6): 30-39. doi:10.3976/j.issn.1002-4026.2016.06.005

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Leaves from Lonicera japonica Thunb. are byproducts of Lonicerae japonicae flos, about 10 times yield of flowers, and have stronger pharmacological activity. We review chemical constituents of volatile oil, organic acids, flavonoids and iridoid glycosides in leaves of Lonicerae japonicae and discover that these are similar with those of the flowers. Therefore, the leaves can serve as substitutes for Lonicerae japonicae flos for it's existing high prices. Their research focus lies in content determination, component separation and pharmacology of extracts. Their future research should highlight chemical separation and activity oriented active sites, and comparison of pharmacological activity between leaves and flowers from Lonicera japonica Thunb.

Conditions optimization of tissue culture technique of Salvia Miltiorrhiza Bge.

LIANG Cong-lian, CHEN Yan-wen, SU Zheng, YANG Bing-bing, ZHANG Jin-cheng, LI Jia, PU Gao-bin, ZHANG Yong-qing

SHANDONG SCIENCE. 2016, 29(6): 40-44. doi:10.3976/j.issn.10024026.2016.06.006

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To optimize rapid propagation of tissue culture technique of Salvia miltiorrhiza Bge., we addressed the impact of its tissuecultured plantlets by different plant growth regulators and different culture conditions with tender stems with axillary bud as explants. Results show that the most effective induction to axillary buds is MS＋6BA(1.0 mg/L)＋NAA(0.5 mg/L)＋sucrose(3×104 mg/L)＋agar(7×103 mg/L). The most favorable rooting conditions of tissue culture seedling are 1/2MS＋IBA(1.0 mg/L)＋KT(1.0 mg/L)＋activated carbon(5 ×102 mg/L)＋sucrose(2×104 mg/L)＋agar(7×103 mg/L) and 22 ℃ . This technique can be applied to rapid propagation, rejuvenation and detoxification of Salvia miltiorrhiza Bge.

Extraction process optimization of Psoraleae corylifolia L. and Salvia miltiorrhiza Bge. from Bushen Huoxue Granule by orthogonal experiment

WANG Bing, WANG You-feng, LI Jing, WANG Yan, ZHANG Wei

SHANDONG SCIENCE. 2016, 29(6): 45-49. doi:10.3976/j.issn.1002-4026.2016.06.007

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We optimized Psoraleae corylifolia L. and Salvia miltiorrhiza Bge. extraction process of ethanol extraction group in Bushen Huoxue Granule. We also optimized ethanol concentration, ethanol dosage, extraction time and extraction times in extraction process with orthogonal experiment and contents of Isopsoralen in Psoraleae corylifolia and Tanshinone II A in Salvia miltiorrhiza as evaluation indexes. Experimental results show that optimum extraction conditions are 12 times 70% ethanol and three extraction times, one and a half hours per time. The extraction process is simple, reasonable, accurate and practicable, and provides necessary conditions for subsequent optimization of water extraction and granulation process.

Toxicity of aspirin to gastrointestinal tract of zebrafish

SUN Chen, HE Qiu-xia, HAN Li-wen, CHEN Xi-qiang, WANG Xi-min, CHU Jie, HAN Jian, WANG Rong-chun, HOU Hai-rong, LIU Ke-chun

SHANDONG SCIENCE. 2016, 29(6): 50-55. doi:10.3976/j.issn.1002-4026.2016.06.008

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We performed a preliminary analysis of gastrointestinal toxicity of aspirin through analysis of peristalsis, detection of secretion functionality of gastrointestinal endothelial cells and histomorphology of intestinal mucosa with zebrafish as animal model. We discover that aspirin concentration of 50 μg/mL can improve the peristalsis. Aspirin concentration of 50 μg/mL or 100 μg/mL will impair secretion functionality of goblet cells on intestinal mucosa though routine HE staining among intestinal mucosa does not change.

The effect of fructo oligosaccharides and isomaltooligosaccharide on the intestinal peristalsis of zebrafish

HOU Hai-rong,ZHANG Shan-shan,SUN Chen, CHEN Yu-feng, HE Qiu-xia,LI Xiao-bin, YU Tao, PENG De-jie, HAN Li-wen, LIU Ke-chun

SHANDONG SCIENCE. 2016, 29(6): 56-61. doi:10.3976/j.issn.1002-4026.2016.06.009

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The effect of fructo oligosaccharides and isomaltooligosaccharide in different concentration to promote the intestinal peristalsis is discussed by using zebrafish. We selected the 5 d normal growth zebrafish larvae, and then added to a series of fructo oligosaccharides or isomaltooligosaccharide with a range of concentration as experiment group. The number of intestinal peristalsis was counted in all groups including control group and oligosaccharide and oligoisomaltose treated groups with different dose under the microscope after 24 h. The result showed that fructo oligosaccharides and isomaltooligosaccharide can promote zebrafish larval intestinal peristalsis in the concentration of 125~500 mg/mL in dosedependent manner. The effect of oligosaccharide was more obvious than oligoisomaltose under same dose. Using zebrafish can achieve early and rapid screening for drugs promoting intestinal peristalsis.

Impact of loading rate on shear property of Huck rivet of EMUs

WANG Yong-yan, ZHANG Xiang-feng, YAN Lei-lei

SHANDONG SCIENCE. 2016, 29(6): 62-67. doi:10.3976/j.issn.1002-4026.2016.06.010

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For the issue of continual speed increase of EMUs caused frequent Huck rivet rapture, we employ universal mechanical testing machine to perform rivet shear test for riveting components of Huck rivet with different loading rates to investigate the impact of loading rate on its shear mechanical property. Through the comparison of the shear test data and the loaddisplacement curve of Huck rivet of three different loading rates, we discover that average load value of elastic and plastic starting points and elastic scope of Huck rivet all decrease with the increase of loading rate, but its stiffness increases. Test results show that Huck rivet is not distorted and rivet hole is not apt to break when the HRC of Cr12MoV Cold Working Die steel is within the scope of 40~50. The relevant conclusion will provide significant reference for the design and improvement of Huck rivet of the EMUs.

Impact of Cr on microstructure and mechanical properties of cold rolled TRIP steel sheet

GUO Wei-min, XU Na, SHI Jun-bo, LIU Long, ZHAO Bao-ling

SHANDONG SCIENCE. 2016, 29(6): 68-73. doi:10.3976/j.issn.1002-4026.2016.06.011

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We addressed TRIP steel with two different alloy contents. We initially determined its hot rolling and annealing parameters with Gleeble thermalmechanical simulating tester. We further investigated its mechanical properties, metallographic structure and macrotexture through hot and cold rolling and continuous annealing. Experimental results indicate that Cr element can stabilize low temperature austenite, reduce formation temperature of bainite, extend induction period of bainite, and increase volume fraction of austenite and banite in final microstructure of steel 2#. Cr element also increases mechanical properties of steel 2#, better strength and plasticity than steel 1# (no Cr addition). The texture characteristics of steel 1# and 2# are similar, including {332} line texture, {110}<001> and {112}<110> texture component. Cr element therefore increases the strength and ductility of sheet steel without formability reduction.

Impact of ultralow temperature pretreatment on physical properties of cocoanut activated carbon

SI Hong-yu, YANG Li-jun, SUN Kun-yuan, LIANG Xiao-hui, ZHAO Yu-xiao, ZHANG Xiao-dong, ZHANG Yuan-cheng

SHANDONG SCIENCE. 2016, 29(6): 74-79. doi:10.3976/j.issn.1002-4026.2016.06.012

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To enhance absorption property of activated carbon and reduce energy consumption of preparation technology, we address the impact of ultralow temperature pretreatment on quality and preparation technology of activated carbon. We employ liquid nitrogen to pretreat coconut shell at ultralow temperature. Through rapid temperature rise, we prepare activated carbon at 600 ℃ whose specific surface area surpasses that of nonpretreatment activated carbon at 800 ℃. The specific surface area of activated carbon of the coconut shell increases to 2300 m2/g from 1 600 m2/g, and its micropore volume increases to 0.92 cm3/g from 0.67 cm3/g. Results show that ultralow temperature pretreatment has significant positive effect to quality improvement and reduction of energy consumption of activated carbon. The research provides reference for functional development and the improvement of surface structure of activated carbon.

Performance experiment of Nbutanol-gasoline blending fuel applied gasoline engine

AN Ming, FENG Hong-qing, LIU Dao-jian, ZHANG Jing, LI Dun, ZHANG Xiao-dong

SHANDONG SCIENCE. 2016, 29(6): 80-86. doi:10.3976/j.issn.1002-4026.2016.06.013

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We conducted performance experiment for blending fuel of different blending ratios of nbutanol and gasoline applied port fuel injection engine. We compared pure gasoline and the blending fuel of blending ratios of 10% and 20% for 2 000 r/min and 2 500 r/min. Results show that the power of the engine slightly falls and BSFC increases a little. Specific fuel consumption is the lowest for torque moment of 90 N·m. For experimental condition, HC and NOx emission slightly decreases. The effect on CO emission is less.

Particle swarm optimization based multibenefit intersection signal timing model

LUO Bing, WEI Li-ying

SHANDONG SCIENCE. 2016, 29(6): 87-93. doi:10.3976/j.issn.1002-4026.2016.06.014

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Urban traffic delay usually occurs at intersections, so the improvement of operational efficiency of a signalized intersection is very important for alleviation of traffic congestion. We establish a multibenefit signal timing optimization model based on average vehicle delay, vehicle stopping times and traffic capacity of the intersection, and employ particle swarm optimization (PSO) algorithm to solve it. Analysis of actual cases demonstrates that the model reduces average vehicle delay and stopping times of an intersection, increases traffic capacity of an intersection, and comprehensively improves multiple indicators of an intersection. It therefore has significant effect on the improvement of operational efficiency of an intersection.

Pilot study on bioenzyme degradation to pentachlorodiphenyl

JI Lei, CHEN Guan-hong, FU Xiao-wen, HUAGN Yu-jie, WANG Jia-ning, ZHANG Qiang

SHANDONG SCIENCE. 2016, 29(6): 94-97. doi:10.3976/j.issn.1002-4026.2016.06.015

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Polychlorinated biphenyls (PCBs) is a representative of persistent organic pollutants (POPs). More its chlorinated number leads to more difficult its degradation . We prepared PCBs compound degrading enzyme of key enzyme formate dehydrogenase (FDH) of NADH coenzyme regeneration system with isolated 6 PCBs degradation bacteria strains as materials. We address its degrading effect to PCBs. Results indicate that degradation rate of Pseudomonas sp. MGB11/FDH compound enzyme to pentachlorodiphenyl PCB114 is up to 69.4% within 10 h. It therefore has application value in the repair for high chlorine PCBs pollutants with high toxicity and low degradability.

Impact of different salinity, culture media and trace elements on phenanthrene degradation of Mycobacterium sp. SP-3

HUANG Yu-jie, ZHANG Wen, FU Xiao-wen, GAO Yong-chao, KONG Xue, GUO Shu-hai, WANG Jia-ning

SHANDONG SCIENCE. 2016, 29(6): 98-103. doi:10.3976/j.issn.1002-4026.2016.06.016

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We addressed degradation effect of phenanthrene by Mycobacterium sp. SP3 for different salinity, culture media and trace elements. Results show that degradation rate of phenanthrene is maximum, 87.41%, when salt concentration is 1%. Degradation rate of phenanthrene is more than 80% in LB liquid media, modified LB and modified inorganic salt liquid media, no significant difference among them. Fe2+ concentration of 100 μmol/L, Zn2+ concentration of 5 μmol/L and Mg2+ concentration of 100 μmol/L can increase degradation ability of Mycobacterium sp. SP3 to phenanthrene. However, Cu2+ can inhibit degradation ability of the strain to phenanthrene with the increase of its concentration. The results will be benefit for the application of the strain to biodegradation of polycyclic aromatic hydrocarbons and the increase of its biodegradation capability to polycyclic aromatic hydrocarbons such as phenanthrene.

Perfect L^Uabundant semigroups

WU Peng, LI Gang

SHANDONG SCIENCE. 2016, 29(6): 104-110. doi:10.3976/j.issn.1002-4026.2016.06.017

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We define the relation LU on semigroups. We also acquire some structure theorems of perfect LUabundant semigroups with normal bands and CLUabundant semigroups.

Performance experiment of LD-pumped passively Q-switched Nd:YVO4/Cr⁴⁺:YAG laser

LIU Yan-ming, WENG Run-min, LIU Xiang-hui

SHANDONG SCIENCE. 2016, 29(6): 111-116. doi:10.3976/j.issn.1002-4026.2016.06.018

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We investigated the pulse performance of a LDpumped passively Qswitched Nd:YVO4/Cr4+:YAG laser with a 7.5 cm straight cavity. We employed two output plane mirrors with different transmissions and two Cr4+:YAG crystals with different initial transmissions to research the variation of average output power, pulse width, pulse frequency, singlepulse energy and pulse peak power with pump power. High stability and reliability Qswitched pulse with the shortest pulse width of 15 ns was obtained at T=6.5% and T0=60% when pump power was 13.3 W. Its corresponding peak power can reach 3.04 kW, so it has very broad application prospect in military defense.

Mechanism analysis of bridge pier displacement accident of a prestressed concrete box girder bridge

WANG Cheng-ping, YANG Biao, LI Xuan

SHANDONG SCIENCE. 2016, 29(6): 117-125. doi:10.3976/j.issn.1002-4026.2016.06.019

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For the complexity and uncertainty of analysis process of pier displacement accident, we simulate and analyze the cause of pier displacement accident and its internal mechanism with the impact of surcharges action of recent fill caused lateral displacement of soil pile of a prestressed concrete box girder bridge pier on the force of pile foundation as a subject and the combination of onsite inspection, comprehensive monitoring and theoretical analysis and numerical simulation. We employ pile top push, pier top traction, antislide pile, balance load to conduct rectification and accident management based on hierarchical processing principle and actual situation. Pier deviation therefore returns to the allowable range, and the accident is avoided. We also dynamically monitor the pier, antislide pile and anchor rod in the rectification process. Results show that all displacement indicators satisfy the requirements, so the accident analysis is accurate, and the scheme is reasonable and effective and has better disposition effect. The method provides reference for postsurvey of similar accidents, analysis of accident cause and rectification process.

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