bluuebunny/crossref_metadata_2025 huggingface dataset:
Effects of Advanced Glycation End Products on the mRNA Expression of Urotensin II and G Protein-Coupled Receptor in Rat Mesangial Cells
Authors: Zhao Yan , Lin Feng Wu , Li Cai , Li Xiang Jun , Shi Yan , Yu Xiao Yan , Sun Bo , Miao Chun Sheng
Published: September 2013

To investigate the impact of AGEs with different concentrations and different times on the expression of UⅡ and GPR14 mRNA in MC. Methods In vitro rat mesangial cells, by adding different concentrations of AGEs(final concentration0、25、50、100和200 mg/L)，37°C incubated for 24 h,AGE100 mg/L groups were cultured 0、2、8、16 and 24 h separately，established the control groups respectively, collecting MC,extracted total cellular RNA for RT-PCR reaction and detected the expression of UⅡ and GPR14 mRNA in MC. Results The expression of UⅡ and GPR14 mRNA in MC were increased with the change of AGEs concentrations from low to high.Compared with AGEs 0 mg / L group, the expression of UⅡ and GPR14 mRNA in AGEs50, 100, and 200 mg / L groups were significantly higher (P<0.05); In AGEs100mg / L groups, the expression of UⅡ and GPR14 mRNA in MC were increased with the time extended, compared with AGEs 0h group, the expression of UⅡ and GPR14 mRNA in AGEs8, 16, and 24h groups were significantly higher (P<0.05); There were no change in control groups（P＞0.05）. Conclusion AGEs can significantly increase the expression of UⅡ and GPR14 mRNA in MC.
Sunflower Husk Integrated Processing Prospects
Authors: Zemnukhova Ludmila A. , Kovekhova Anna V.
Published: September 2013

This paper lists the results of the study of sunflower processing renewable wastes fruit walls (husk) sampled in various Russian regions for the purpose of their use in making various chemical matters and materials with useful properties. Sorption properties of various sunflower fruit walls with reference to Sakhalin crude oil compared to similar wastes of buckwheat and rice and inorganic sorbent (vermiculite). The content and structure of inorganic components of husk samples was studied depending on the sort. Water-soluble materials extracted from fruit walls in different conditions was studied. The content and structure of water/acid/alkaline extraction polysaccharides was found. The ability to use liquid and dry sunflower husk extracts as steel corrosion inhibitors was shown. Lipids contained in sunflower making wastes were described. It was shown that they contain mostly monogalactosyldiacylglycerides and phospholipids which are important bioactive matters.
Research on Antibacterial Activity of Crude Extract from Mangifera Indica Leaves
Authors: Jiang Shao Juan , Zhang Ying
Published: September 2013

The 95% ethanol extracts of mangifera indica leaf was sequentially extracted with petroleum ether, ethyl acetate, n-butyl alcohol and water. Antibacterial activity and minimal inhibitory concentration (MIC) of the four different extraction against Staphylococlus aureus, Escherichia coli, Bacillus subitlis and Saccaromyces cerevisiae were stuied with filter paper method in this paper. Each of the four extracts showed different antibacterial activity: The water extract is the strongest one; l-butanol extract takes second place; Ethyl acetate and petroleum ether extract is the third. MIC of aqueous extract with the strongest inhibitory effect on Staphylococlus aureus, Escherichia coli and Saccaromyces cerevisiae is 0.0125 g/mL, 0.0125 g/mL, and 0.025 g/mL. Moreover, the aqueous extract showed powerful antibacterial activity against all of four bacteria.
Extraction and Analysis of Pigment from Fructus ligustri Lucidi
Authors: Li Xue Kun , Chen Xiu Na , Chen Fang Fang , Li Wen Hong
Published: September 2013

The pigment was isolated fromfructus ligustri lucidi. The pigment belonges to flavonoid by color reaction and absorption spectrum analysis. The color scale was tested, with emphasis on the effects of pH, temperatures, sunlight, oxidizing agent, reducing agent, salt,vitamin C, preservative and sucrose on its stability. Results show that the color scale of yellow pigment fromfructus ligustri lucidiis 52.38. It is stable under acidic condition and degraded under alkaline condition. It has good heat and light resistance. The pigment has better endurance capability against oxidizing agent but reducing agent. The effects of salt and sucrose are relatively small.Vitamin Chas a certain increment on the color, but preservative would degrade the pigment. The study shows that yellow pigment has good stability and supports the application in the food industry.
The Liquid-Solid Phase Transition Characteristic and Protein Binding Property of Composite Cryogel with Embedded Cellulose Beads
Authors: Ye Jia Lei
Published: September 2013

Poly (hydroxyethyl methacrylate)-based composite cryogel with embedded macroporous cellulose beads (pHEMA-CB cryogel) could be of interest as chromatographic medium for bioseparation applications. In this work, liquid-solid phase transition characteristic of the suspension mixture containing HEMA, poly (ethylene glycol) diacrylate (PEGDA), ammonium persulfate (APS),N,N,N',N'-tetramethylethylenediamine (TEMED) and cellulose beads for the production of pHEMA-CB composite cryogel was investigated to reveal the solvent crystallization process occurring in the column. Freezing curves were obtained and the values of initial solvent crystallization temperatureTcand the freezing point temperatureTmcwere estimated. Protein binding property of the pHEMA-CB cryogel grafted with (vinylbenzyl) trimethylammonium chloride (VBTAC) was measured and discussed.
Drug Release Mechanism of Fast Temperature-Responsive Soy Protein/PNIPAAm IPN Hydrogels
Authors: Liu Yong , Wei Shou Lian , Liao Miao Chan
Published: September 2013

Fast temperature-responsive interpenetrating polymer network hydrogels based on soy protein and poly(N-isopropylacrylamide) (PNIPAAm) were prepared using the sodium bicarbonate (NaHCO3) solutions as the reaction medium. The structure and properties were characterized using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The bovine serum albumin (BSA) release behaviors and release mechanism were also investigated. The results show that the proposed hydrogels have high porous structures and have a fast release rate. The BSA release mechanism belongs to an anomalous transport and the Fickian contribution is dominant. The proposed hydrogels may have the potential applications in the field of biomedical materials such as in the controlled release of drugs.
An Efficient Method for Monitoring and Improving the Regeneration Efficiency of Protoplasts from Aspergillus Oryzae HN3042
Authors: Li Cai Hong , Xu De Feng , Ye Ri Ying , Wang Ya Ling , Sun Li Jun
Published: September 2013

Protoplast technique is a powerful tool for strain improvement and the preparation of protoplasts with high regeneration efficiency is the basis of subsequent manipulations. In this study, the effects of enzymatic hydrolysis time on release and regeneration of protoplasts from Aspergillus oryzae HN3042 were investigated by analyzing the time-series image. The results showed that there was a significant correlationship between regeneration efficiency and morphological size of protoplasts (P < 0.01). An efficient method for monitoring and improving the regeneration efficiency of protoplast was thus established by controlling the enzymatic hydrolysis process and the results can be referred to other species during the preparation and regeneration of protoplasts.
Influence Factors Analysis of Transgenic Shoot Regeneration Frequency for Sugar Beet Explants
Authors: Liu Qiao Hong , Cheng Da You , Yang Lin , Yuan Xiao Han , Dai Cui Hong , Kong Fan Jiang , Luo Cheng Fei , Xu De Chang
Published: September 2013

Beet necrotic yellow vein virus coat protein (BNYVV CP) gene cloned from BNYVV in Inner Mongolia of China was transferred to sugar beet explants using agrobacterium tumefaciens-mediated method. Transgenic regeneration shoots were induced from petioles and cotyledons tissues of sugar beet. Three sugar beet lines that were fit for genetic transformation experiment were screened, which were Sumfull8-1, Sumfull8-3 and 9718. The experiment results showed that plant regeneration frequency was influenced by many factors, which include hormone compositions and concentration in shoots regeneration medium, culture conditions, sugar beet genotype, original explant types and culture methods. Influence factors of transgenic shoot regeneration frequency for sugar beet explants were discussed in this paper. Efficient genetic transformation system and transgenic shoots regeneration system of sugar beet were established.
Effect of Culture Conditions on Production of Xylanase by Trichoderma reesei
Authors: Huang Rui , Zhang Chao , Tian Hui , Zhao Ru Ming , Yu Fa Shun , Yao Juan , Gong Da Chun
Published: September 2013

Fermentation of xylanase produced by Trichoderma reesei was conducted in 250mL shake flasks. Several fermentation conditions was investigated that affected production of xylanase by Trichod erma reesei, including inoculum age, inoculum size, medium volume, shear stress, temperature, shaking speed and initial pH. Results showed that the the optimum culture conditions were as follows: inoculum age 45h, inoculum size 10%,medium volume 50mL/250mL, shaking speed 200rpm and initial pH4.0(natural). The maximum xylanase activity under each condition was occurred at 104h and the maximal activities can reach 1425.27U/mL.
Simultaneous Determination of Hydroquinone and Catechol at Poly-Histidine Film Modified Glassy Carbon Electrode
Authors: Yang Qiu Xia , Sui Wei Ping , Fan Da Wei , Li Guo Bao
Published: September 2013

The poly-histidine (poly-HTD) film was prepared at glassy carbon electrode by electropolymerization, and its electrochemical behavior was investigated by cyclic voltammetry. Results show that the behavior of this poly-HTD film is in good agreement with quasi-reversible process characteristic. At low scan rates, the electronic transfer process of electrode reaction is controlled by surface process. At this poly-HTD film modified electrode, an excellent electrocatalytic ability towards the redox of hydroquinone (HQ) and catechol (CC) with decrease of the overpotential and improvement of the redox peak currents was found. Differential pulse voltammetry was used for the simultaneous determination of HQ and CC in their mixture, and the peak-to-peak separation ΔEpfor HQ and CC was 110 mV. Therefore, this polymer modified electrode can be used for the simultaneously selective determination of HQ and CC without interference with each other.
Monoamine Oxidase Inhibitory Activity of the Total Alkaloid and Organic Acid from Chinese Herbal Medicines
Authors: Yang Zhong Duo , Ren Jin , Shu Zong Mei
Published: September 2013

The aim of this study was to search for potential monoamine oxidase (MAO) inhibitors from Chinese herbal medicine. The organic acid extracts of 34 and the total alkaloidal extracts of 30 traditional Chinese medicines were tested for their MAO inhibitory activities. The results showed that the organic acid extracts of Liquidambar formosana, Pharbitis nil, Punica granatum and alkaloid extracts of Coptis chinensis exhibited the most potent inhibition on MAO and their concentration that inhibited 50% of MAO activity (IC50) values less than 10 μg/mL.
Effect of Reagent Vibrational Excitation on Product Rotational Polarization in Reactions Li + DF (v=0-3, j=0) → LiF(v', j') + D
Authors: Cheng Jie , Yue Xian Fang
Published: September 2013

A quasiclassical trajectory calculation is carried out to investigate the effect of reagent vibrational excitation on product rotational polarization in the reactions Li + DF (v=0-3, j=0) ---> LiF(v', j') + D. It is found that the reagent vibational excitation highly enhanced the product rotational alignment, however, the enhancement is not monotonically increasing with the gradual increase of the vibrational quantum number from v=0 to v=3. The product rotational orientation varies from the negative to positive direction ofyaxis with the increasing vibrational quantum number from v=0 to v=3.
Determination of Fourteen Sulfonamides Residues in Penaeus vannamei by High Performance Liquid Chromatography Coupled with Post-Column Derivation
Authors: Huang Dong Mei , Xu Jie , Shi Yong Fu , Huang Xuan Yun , Yu Huan , Feng Bing , Wang Yuan , Cai You Qiong
Published: September 2013

The method was established to detect fourteen sulfonamides residuces in Penaeus vannamei by high performance liquid chromatography coupled with post-column derivation. Sulfonamides residues were extracted with ethyl acetate after adding sulfapyridine as internal standard. The extract was concentrated.The residues were transferred to hydrochloric acid solution. The solution was defatted with n-hexane. The compounds were detected by HPLC with fluorescence detector .The standard addition method was used. The calibration curves were linear. The recoveries ranged from 77.8% to 103.6%. The relative standard deviations were all below 9.1%. Quantitative detection limits of fourteen sulfanomides ranged from1.0μg/kg to 5.0μg/kg. Results indicated that the method was easier, faster and more accurate.
Antioxidant Effect of Bighead Carp Protein Hydrolysates
Authors: Li Lin , Sun Li Na , Wu Min Zhi , Pan Zi Qiang
Published: September 2013

The aim of this study was to observe the antioxidant effect of hydrolysates derived from bighead carp protein (HBCP). The effect was observed through the life span experiment of D. melanogaster and was evaluated by antioxidant indexes of D-galactose (D-gal) induced senile mice. The mean and maximum life span of D. melanogaster with HBCP supplement in nutritional medium was compared to that of control group, which were fed without any addition. The senile mice were induced by celiac injection of D-gal for six week. Experiment groups received HBCP at different dosages (3 g/kg, 1.5 g/kg and 0.5 g/kg) by intragastric administration, while the aged group received saline every day. Contents of malonadehide (MDA), activities of superoxide dimutase (SOD) and glutathione peroxidase (GSH-Px) were determined. The results showed that the addition of HBCP in feedstuff could increase the mean and maximum life span of D. melanogaster. Compared to the D-gal induced senile group, contents of liver and brain MDA in mice which received HBCP (3 g/kg and 1.5 g/kg) by intragastric administration were significantly decreased (p<0.01), while the activities of the antioxidative enzyme were increased. This result indicated that HBCP had an antioxidant effect for D-gal induced senile mice and can extend the life span of D. melanogaster.
The Adsorption Characteristics of Phytochemical on Supporters
Authors: Mankit Thararat , Petiraksakul Anurak , Jiemvarangkul Pijit
Published: September 2013

The objective of this research is to study equilibrium adsorption, adsorption isotherm and the amount of the phytochemical called Micronice Bio MEX 3, which is adsorbed on various supporters. Micronice is a biodegradable chemical liquid product collected from Technogreen Company Limited. The supporters in this work are activated carbon, zeolite and brick which are used as adsorbents. The supporters were immersed in the Micronice with various periods to find out their adsorption equilibrium time. The results show that the adsorption equilibrium time for all supporters is 60 minutes and the mass adsorption percentages of activated carbon, zeolite and brick are 14.05%, 1.58% and 2.24%, respectively. An adsorption isotherm can be described by the Langmuir and Freundlich models. The Freundlich constants of activated carbon, zeolite and brick are KF= 4.76 x10-8(mg/g)(L/mg)1/n, 7.15x10-8(mg/g)(L/mg)1/nand 1.10x10-4(mg/g)(L/mg)1/n, n = 0.772, 0.619 and 0.922, respectively. The Langmuir constants of activated carbon, zeolite and brick are KL= 756.62 L/mg, 12,924 L/mg and 3,918.60 L/mg, qo= 1,428.57 mg/g, 44.25 mg/g and 303.030 mg/g. The results present that the adsorption mechanism of all supporters can be well described by both Langmuir and Freundilch models and the best supporter is activated carbon.
Effects of Polychlorinated Biphenyl (PCB101) and its Hydroxylated Metabolites on Proliferation of MCF-7 Human Breast Cancer Cells
Authors: Shi Yong Fu , Ou Zhou Luo , Cai You Qiong , Gu Xiao Li , Huang Dong Mei , Zhang Ting , Wang Yuan , Yu Hui Juan
Published: September 2013

Polychlorinated biphenyls and their hydroxylated metabolites become more and more concerned for their endocrine disruption. At the presented study, experiment was designed to obtain the disruption effect of PCB101 and its hydroxylated metabolites . The proliferation of MCF-7 human breast cancer cells was detected at different exposed concentration and time period. MCF-7 cells were cultured with the concentration of PCB101 and twor of its hydroxylated metabolites at 5×10-95×10-85×10-75×10-6mol/L. And the concentrations of 17β-Estradiol (E2) were2×10-92×10-82×10-72×10-6mol/L respectively. And the proliferation rate was detected after 24h,48h, 72h, 96h exposure.Ethanol was used as solvent control.The results indicated that PCB101 and its hydroxylated metabolites had no effect on MCF-7 cell proliferation at designed concentrations and exposure time.
Structural Modification of 1,4-Naphthoquinone Molecule for Application in Dyeing
Authors: Liu Rui , Li Hong
Published: September 2013

Quinones are useful compounds as dye compounds and the 1,4-naphthoquinone structure constitutes an essential part of these classes of compounds. The process in constructing 1,4-naphthoquinone for possible screening as dyestuff is described, starting from 1,4-naphthoquinone and hydroxy acid. It provides a novel methodology for the synthesis of the 5-nitro-2-substituted 1,4-naphthoquinones. The products were characterized by IR and1H NMR.
Synthesis of the Novel Thienopyrimidine-Based S-Glycoside Analogues via Nucleophilic Addition/Cyclization/Glycosylation Reactions
Authors: Dai Qiu Hong , Zou Kun , Liu Ming Guo , Luo Lin , Huang Nian Yu
Published: September 2013

The title compounds thienopyrimidine-basedS-glycoside analogues were synthesized through the nucleophilic addition/cyclization/glycosylation reactions in good yields from easily accessible starting materials under mild reaction conditions. All of compounds were characterized by NMR, MS, IR and elemental analysis. The efficient approach allowed the facial synthesis of small libraries of thienopyrimidine-basedS-glycoside analogues with different structural motifs for biological screening.
Study on the ISF Procedure of the Throttle Pedal Fixed Plate Based on the Numerical Simulation
Authors: Li Li Hua , Tao Long , Wang Jin , Zhao Cheng
Published: September 2013

Incremental Sheet Forming (ISF) is a new sheet metal forming process characterized by higher formability, product independent tooling and greater process flexibility. A large amount of research work has been spent on ISF process in the last years, but industrial applications are not spreading accordingly. In this paper, numerical simulation, combined with FLD, was performed to analyze the formability of a practical production. Additionally, an actual experiment was done to test and verify the accuracy of numerical simulation analysis results. The high similarity between the analytical prediction values and the measured values indicates it is feasible to predict the formability of the ISF production.
A Method to Produce AA6101 Aluminum Alloy Rein-Forced Conductors
Authors: Zhou Tian Guo , Li Peng , Zhang Xue Fei
Published: September 2013

ɸ9mm aluminum alloy rods were prepared by Castex process with on-line solution. The rods were subsequently cold-drawn to ɸ 4 mm wires followed final artificial aging treatment. The microstructures and properties of ɸ 4 mm finish wires were investigated. The results show the tensile strength and equivalent conductivity of the T6-treated wires are 340MPa and 54.21%IACS respectively, it is good competent in the requirement for aluminum alloy-reinforced.
Interface and Bonding Strength of Explosively Welded T2/DT4C Laminate
Authors: Liu Peng , Jiang Jian Ping , Sun Bai Lian
Published: September 2013

T2 red copper plate and DT4C electrical pure iron plate were cladded by explosive welding. Microcosmic analysis and bonding strength of the bonding interface were also studied. Results indicate that the welded zone appears periodical wavy metallurgical interface and obvious element diffusion occurs in the interfacial zone. In addition, no separation happens after the bonding strength test and tension-shear test and the broken zone takes place in the T2 red copper part of the samples, indicating that the bonding strength of the welded interface can get no less than the strength of T2 red copper.
A New Criterion for Optimization the Intermittently Reversing Direction Electromagnetic Stirring in Round Strands Continuous Casting
Authors: Lei Zuo Sheng , Yang Xiao Hua , Wei Ru Jun , Gao Qi
Published: September 2013

Liquid metal flow behavior in round strands continuous casting under intermittently reversing direction electromagnetic stirring was measured by ultrasonic Doppler velocity-meter in a physical simulation system in order to investigate the effects of time interval () of periodically reversed magnetic field on the spatial and temporal flow. The results show that under electromagnetic stirring with direction reserved magnetic field, theres a periodically change of the metal flow velocity and rotation direction with the periodically direction changing of the magnetic field. From both the experimental and mathematical model calculation results, it is found that when is nearly equal to the time required for the metal flow speeding to the maximum velocity from still and decreases to zero again, there is a critical value of the rate of dynamic pressure, which means the wash effect of the liquid metal flow. On this point, rate of dynamic pressure was proposed to be a criterion for optimization the processing of electromagnetic stirring.
Surface Magnetization of Hematite by Metal Ions
Authors: Wu Xi Qing , Yang Ping Wei , Cheng Zheng , Dai Liang
Published: September 2013

In an open hematite pulp with Fe2+ or Fe3+, Mn2+ and Zn2+, the surface magnetization of mineral hematite was accomplished by mechanical stirring. The both systems of Fe2+ or Fe3+, Mn2+ and Zn2+ magnetized the hematite surface to improve the recovery of hematite by magnetic separation. In the presence of Fe2+, the recovery of hematite increased from 69.0% to 85.7% after magnetization when the pulp temperature was 65°C, the concentration of Fe2+ 1.8x10-2mol/L, the concentration of OH- 0.1mol/L, the stirring speed 400r/min and the reaction time 5min respectively, and the saturation magnetization of hematite also increased from 0.62emu/g to 1.07emu/g, while in the presence of Fe3+, Mn2+ and Zn2+ ions, the saturation magnetization increased to 0.79emu/g. So, the magnetization and the magnetic recovery of hematite in the case of Fe2+ is better than that of Fe3+, Mn2+ and Zn2+. The surface magnetization of hematite occurs due to the adsorption of ultra-fine particles with strong magnetism on the hematite surface in the form of aggregates in the case of Fe2+ while in the form of flakes in the case of Fe3+, Mn2+ and Zn2+.
Correlation Analysis of Seamless Fabric Performance and Sizing Effect
Authors: Yan Yu Xiu , He Ling , Feng Yan Na , Tao Jian Wei , Jin Zi Min
Published: September 2013

The study selects cylinder cloth which weaved by seamless fabric common materials as experimental samples, measures compressed thickness, bending length, extensibility, bending rigidity and etc index of fabrics, uses the stereotyped pleat recovery angle to characterize the setting effect. According to the experimental data, using statistical methods to analyze the correlation of these indicators and setting effects, ultimate goal is to improve fabric dimensional stability whatever wearing or stored, to provide a reference for optimizing the seamless fabric stereotypia. Results show that there is a close correlation between compression properties T2, T100, drape performance F0, shear stiffness G and stereotyped pleat recovery Angle.
Design and Synthesis of (E)-2-Hydroxy-5-Alkoxyl Salicylaldoxime Copper Extractant
Authors: Liu Dong Wang , Wang Xiao Ji , Huang Shuang Ping , Tang Lin Jun , Chen Shi Peng , Zhang Jian Ting
Published: September 2013

A kind of novel (E)-2-hydroxy 5-alkoxyl salicylaldoximes copper extractants was designed and synthesized. The synthetic route was started from 1, 4-dihydroxybenzene and the reaction sequence employed for the preparation of the (E)-2-hydroxy-5-alkoxyl salicylaldoxime included monoetherification, formylation and oximination.
Effects of Post-Rolling Anneal on the Primary Recrystallization Structure and Texture of High Permeability Grain-Oriented Silicon Steel
Authors: Yang Jia Xin , Liu Jing , Li Shi De , Li Chang Yi , Wang Ruo Ping , Lu Zhi Hong
Published: September 2013

The decarbonized strips of high permeability grain-oriented silicon steel were annealed at different temperatures in a furnace after rolling at the ratio of 21.1%. The changes of the structure and the texture were analyzed by optic microscope and X-ray diffraction. Results show that the grains are easy to grow up and coarse after annealing, while the texture of the strips changes gradually from {111}<112> to {118}<110> and rotary cubic texture as the annealed temperature rises. The mechanism is that at a relatively lower cold rolling ratio, the distortion storage energy of the ferrite grains in the directions of {118}<110> and {100}<110> is higher than that of the {111}<112> grains so that the texture can form after a suitable annealing process.
Buckling Characteristics of Microdrills by Using Finite Element Method
Authors: Tseng Jung Ge , Huang Bo Wun , Mao Lian Sen , Kuang Jao Hwa
Published: September 2013

In recent years, microdrill becomes a very important element in the process of drilling apertures of PCB integrated circuits. But different material property will often generate collapse or fracture of the drill tip. This study is about to establish a finite element model (FEM) and to get the buckling stress analysis of the microdrill by ANSYS software. Since the microdrill is a structural brittle material and easy to be broken, force over buckling critical load is employed to explore the structural weakness and to analyze its stress damage. In addition, vibration, occurred at high-speed micro drilling, could easily lead to the excessive deflection or feeding amount of the drill tip, cause the collapse or rupture of the microdrill, and lower the quality by reaming the machining object. Poor geometric aspect ratio of the drill tip will generate different loads in different parts. How to manage the pressure for the microdrill to apply the force stably and to avoid the breakage and destruction is very important both for the tool life and the cost control. Therefore, how to overcome the buckling of tiny structure component under loading becomes a great issue to be explored.
Finite Element Analysis of Polyethylene Pipe Butt Fusion Joints with Circumferential Surface Cracks
Authors: Zhu Zhi Bin , Yang Xiao Xiang , Chen Li Jing , Lin Nai Chang , Wang Zhi Tuo , Wang Zhe Fang
Published: September 2013

Based on the viscoelastic material property of polyethylene pipe, software ANSYS was used to simulate and analyze the mechanical property of polyethylene pipe butt fusion joints with circumferential surface crack defects. The viscoelastic material creep parameters were characterized as Prony series and 1/4 node singular element was selected for meshing along the boundaries of the crack, then the stress intensity factor of polyethylene pipe butt fusion joints with circumferential surface crack was calculated under the uniform internal pressure. Through the finite element simulation, the result showed that polyethylene pipe were most likely to fracture failure when crack initiated. Thus the viscoelasticity of materials can be ignored when analyzing the stress intensity factor of circumferential surface cracks of polyethylene pipe. the main influencing factor of the circumferential crack defects was the ratio of the crack depth to the thickness of polyethylene pipe.
CFD Simulation of Flow Characteristics in Liquid-Liquid Ejectors
Authors: Zhang Yan , Hu Yang Dong , Wu Lian Ying
Published: September 2013

Computational Fluid Dynamics (CFD) technique was employed to investigate the flow regime and pattern in liquid-liquid ejectors. The results show that the turbulent dissipation rate decreases initially and then increases with the increase of the secondary flow mass rate at a fixed working flow rate, and increases as the working flow mass rate increases at a fixed secondary flow rate. The shape of the flow distribution is convex when the ratio of suction flow velocity to jet flow velocity (velocity ratio) is 0.25,while the shape is concave at the ratio of 4. In addition, the deflection of the flow field inside ejectors is affected by the variation of secondary flow feed angle. There exists an angle of about 24°, at which the flow pattern would be relatively reasonable.
Extraction of Vanadium from Chloride Solutions Using Di (2-Ethylhexyl) Phosphate
Authors: Hu Guo Ping , Chen De Sheng , Qi Tao , Zhang Chang Qiao , Zhao Hong Xin , Liu Ya Hui , Yu Ping , Wang Li Na
Published: September 2013

Extraction of vanadium has been developed to extract vanadium from hydrochloric solutions with high concentration of iron ions. The effects of extraction conditions such as pH values, extraction time and extraction temperature on the distribution ratio of vanadium were investigated. The results showed that the distribution ratio of vanadium increased with the higher pH, the lower temperature and the longer equilibrium time. The distribution ratio reached 25 and the extraction ratio reached 96.2% by single stage extraction. When the organic phase was stripped with 2 mol/L hydrochloric acid at the phase ratio (O/A) 10:1, the vanadium stripping ratio of 98.3% could be achieved.
CNC Processing Method of Complicated Curved Surface
Authors: Sun Peng
Published: September 2013

To get complicated curved surface parts in wire cut electronic discharge machining, a rotary CNC processing table was designed. Through establishing the mathematical equations of the general motion form, the several major processed forms are obtained. Then the processing system and its experimental device were established. Through machining experiment and error analysis, it shows that the system has high machining quality and low cost and has practical applicability, to produce a novel research direction for solving the difficult problems of machining spatial curved surface parts.
Study on Aircraft Lift Estimation
Authors: Shang Yong Feng
Published: September 2013

This chapter describes how lift can be derived from a known aircraft geometry and conversely, how the selection of aircraft layout influences the generation of lift. As the fuselage shape is predetermined by the payload requirements, the nacelle geometry by the engine size, and the tail surfaces by stability considerations, the wing parameters are the principal variables to be considered in respect to lift aspects. To this end, guidance is given on the selection of wing section profile and platform geometry to provide specified performance requirements. A lift estimation method covering all the aircraft components is also provided. Such methods are suitable for use in the conceptual design phase and provide an introduction to more detailed estimation procedures.
A Dynamic Contact Model of Rough Surfaces Based on the Microscopic Contact Analysis of Asperities
Authors: Tan Yan Qing , Zhang Lian Hong , Hu Ya Hui
Published: September 2013

Dynamic contact model of rough surfaces can provide the theoretical basis for analyzing the microscopic damage of surfaces in wear process and constructing the analytical wear model to predict wear. A dynamic contact model of sliding rough surfaces is innovatively constructed based on the characterization of the contact asperities on rough surfaces in this paper. Firstly, an asperity model of rough surface is set up according to the surface topography parameters and the static contact parameters is evaluated in the light of statistics contact theory; Then the contact characteristic of surface topography in sliding is analyzed and a series of equivalent contact models are proposed; Finally, the dynamic contact model of rough surfaces is established and from which the dynamic contact parameter of rough surfaces is formulated. The dynamic contact model can be further improved to analyze the friction fatigue wear of sliding pairs and provide reference for tribology design of mechanical surfaces.
Preliminary Study on Dynamic in Statics of Packaging Container Model Designs
Authors: Yang Yong Gang
Published: September 2013

It explored how to create visual motion feeling with an aesthetic viewpoint Dynamic in Statics from the basic function and structure of packaging container molding. In this paper, it analyze the following as the barycenter and momentum of container molding, the dynamic feeling off horizontal and vertical, the dynamic feeling and the change of body structure, the dynamic modeling of ornament shape. And then it also discuss the following as the independence and relevance of local and whole shape of container structure, the coordination of molding form and perception, which present study and design points for Dynamic in Statics of packaging container molding, and also put forward a art form and some state requirements on Dynamic in Statics for shape design.
Design and Experiment of Vortex Rings Umbrella Based on Finite Element Method
Authors: Xu Gang , Jiang Ting Ting , Hu Jie
Published: September 2013

In order to research and design the vortex rings umbrella, finite element analytical approach is integrated to design the complicated vortex rings umbrella. Three-dimensional geometrical model of vortex rings umbrella is constructed from the feature of non-linear ductile deformation, and it establish kinetic model of particle node at the stage of steady state rotary motion, finally build simulation model. The calculation shows that motion variation laws of its result and experiment result are basically same, the model is deemed effective and correct. This research can help rapid realization of engineering design of vortex rings umbrella and provide a new thought for the research of motion performance of vortex rings umbrella.
Experiment on Cement Proportion and Mixing Technology for Expansive Soil Modification
Authors: Zeng Bin , Liu Qing Bing , Tao Zhi Hao , Huang Ding Qiang , Dong Zhong Ping
Published: September 2013

Expansive soil has properties such as expanding when encountering water, shrinking and crazing when losing water. Mixing with certain proportion of cement is the main method to modify expansive soil now. According to the field modification experiment on expansive soil which has been done in 3rd section of Changjiang-to-Hanjiang water diversion project, the paper researched the modification effect of different kind of expansive soil that modified by different cement proportion, and modification effect that depends on different size of broken soil mixed in the field. The experiment result shows that, for the medium and weak mixed expansive soil and medium expansive soil in study area, the optimal cement proportion is 4% and 6%. The free swelling ratio of mixed expansive soil can be decreased below 40% by any broken size, and the medium expansive soil can be modified effectively only when the biggest broken size is less than 31.5 mm by controlling the moisture content and improving mixing technology.
The Research Status of Equivalent Spaced Targets in Armor-Penetration Projectile Power Test
Authors: Gao Hong Chao
Published: September 2013

Due to the emergence of more and more composite armor target, the research related with interval has real application background. The target board with interval structure form attenuates jet penetration effectively. If the interval target and homogeneous target can build equivalent relations, with a certain thickness of the interval target equivalent instead of a homogeneous target board, it will slash test cost and save money. After the target principle and research method, the jet penetration interval target for energy consumption, the jet penetration depth interval target researches are simple introduced, finally the research direction of interval target is put forward with own suggestions.
Dynamic Simulation of Methanol Synthesis Loop under Abnormal Conditions
Authors: Tian Wen De , Sun Su Li
Published: September 2013

As the core component of methanol production, methanol synthesis takes place in a loop where hydrogen, carbon monoxide and carbon dioxide are converted to methanol per pass through the methanol reactor. Its nonlinear mathematic model is built in this paper, based on partial data from literatures. The research focuses on four types of unit: methanol reactor, methanol separator, synthesis gas compressor and heat exchanger, and performs dynamic simulation under fault conditions. Results show that the model has enough precision to meet fault simulation requirements. This work establishes the research foundation for future quantitative fault modeling, diagnosis algorithm selection and fault effect analysis.
Mechanical and Thermal Analysis of Topological Optimization for Load Bearing Skate
Authors: Cha Yun Ju , Kim Hyun Woo , Ko Sun Ho , Kwac Lee Ku , Kim Hong Gun
Published: September 2013

Load bearing skate for the current weight is heavy and requires its own weight, but persist without improvement in the lack of capital and technology, but it is a reality. In this study, carried out phase optimal design to remove unwanted elements that do not have a stress to reduce the weight of skating that is being used for cargo transportation for, it reduces the weight of the objective function, we examined the safety associated with it.Using the FEM analysis Let's examine the effect on the failure strength by extreme temperatures that are used in the field of stress concentration due to discontinuity in the analysis at the time, structure - was carried out thermal analysis.Further, while ensuring safety through safety factor 2.1 and 20% weight reduction by the phase volume of for weight reduction.
Black Hole Spectroscopy in the Isotropic Coordinate
Authors: Chen Bing Bing , Ren Wei , Tang Jian
Published: September 2013

In this paper, the black hole spectroscopy is intriguingly described in the isotropic coordinate by combining the black hole property of adiabaticity and the oscillation velocity of the black hole horizon. The result shows that the horizon area of a Schwarzschild black hole is quantized independent of the choice of coordinates, with an equally spaced spectroscopy always given by .
Simultaneous Determination of Copper, Lead and Zinc in Alloy by Potentiometric Titration Coupled with Multivariate Calibration Using a Flow Injection Technique
Authors: Deng Chan Gai , Liao Li Fu , Long Wei
Published: September 2013

A new potentiometric titration method coupled with multivariate calibration using a flow injection technique for the simultaneous determination of multi-components in alloy has been developed. the titrant is a mixture of EDTA and sodium fluoride, both mercury film electrode and fluorinion selective electrode are inserted in the flow cell. In a process of titration, both the potentiometric of mercury ion and the mixed proportion of reactants at each titration point can be obtained simultaneously from the two electrodes, and then the concentration of each component in the mixture can be obtained from the titration curves by multivariate calibration method. The method is free of volumetric and time measurements, and reduces the consumption of reagents and samples. The method is also very quick in analysis rapidity. The method has been applied for the simultaneous determination of copper, lead and zinc in alloy samples with the relative standard deviation of 0.18%~0.45% and the recovery of 99.5%~101.6%.
Alternating Magnetic Field Method Application to Detection of Blade Part
Authors: Zhang Xiang Lan , Yu Hai Xia , Yang Yun Long
Published: September 2013

By analyzing the pattern and law which alternating magnetic field signals affect, the relations of alternating magnetic field signals and flaws were obtained. These relations illustrated alternating magnetic field technology ?s method and way. Some analysis was done after making contrast test samples. These analysis confirm that alternating magnetic field method can quickly find locations of defects during detection of blade part. It may raise efficiency and ensure equipments safely run.
Research on Remote Monitoring Technology of Mechanical Conditions of Port Logistics Operations Based on Key Nodes
Authors: Tao Yi , Wang Lin Shuai
Published: September 2013

This paper reviews the key technology links of remote monitoring of mechanical conditions of port logistics operations studies ActiveX technology, diversity antenna technology, OPC technology based on each link and introduces the application of above technologies in the intelligent monitoring of port logistics mechanical state.
A New Approach for B Ultrasound Images Enhancement
Authors: Pang Chun Ying , Jiao Qi Yu
Published: September 2013

To make B ultrasound images clear, a new image enhancement method was studied.The study used an improved fuzzy algorithm based on gray-level to process B ultrasound images. And the process is largely simple by adding threshold selection which could meet different clinical demand. Several kinds of enhancement algorithms for B ultrasound images are evaluated and compared by using MATLAB to process the same image. The results after contrast show that the improved fuzzy algorithm is effective and achieved in clinical practice.
Soft Sensing of the Lysozyme Mycelium Bacteria Concentration Based on SUKF Algorithm
Authors: Yang Jian Ning , Zhou Qing , Xu Jiao
Published: September 2013

In order to measure lysozyme biomass activity concentration accurately and in real-time in the fermentation process of marine biological enzyme preparation, soft sensing with the nonlinear state-estimation based on SUKF has been used, the method uses KF framework, embedded in SUT. In fact the fermentation bacteria is lysozyme, which is fermented in a fermenter of KRH-100L according to process requirements. The statistical properties of variables through the nonlinear transformation has been calculated and the degradation effects of aggregation of high-dimensional and nonlinear fermentation model would be effectively settled in sample. By using σ-point set with symmetric sampling strategy, the mean points increased, according to the fermentation of priori information of each dimension mean. By using cross-validation method to select model parameters, compared with the support vector machine SVM with RBFNN algorithm, the experimental results show that the smallest root mean square statistical error of training and testing in soft Sensing with SUKF reduced by 2% or so.
Determination of Parameters of Leakage of Propane from the Tank
Authors: Svoboda Michal , Turekova Ivana , Szabova Zuzana
Published: September 2013

The article deals with determination of parameters for leakage of hazardous substances by using of computer programs ALOHA and EFFECTS PLUS. The calculated parameters are compared in a practical application for gas tanks with regard to limitation of these programs. There are compared the possibilities of using of this programs, particularly for determining the parameters of a very small leak to determine exactly areas with the potentially explosive atmospheres. In conclusion of the study are summarized the possibilities of using and the proposals of computer programs in case of leakage of propane from the tank.
τ-D Decomposition to the One Dimensional Delay Differential Equation by Fixed the Coefficient b<0
Authors: Gao Ai
Published: September 2013

In this paper, we provide a partition of the roots of a class of transcendental equation by using τ-D decomposition ,where τ>0,a>0,b<0 and the coefficient b is fixed.According to the partition, one can determine the stability domain of the equilibrium and get a Hopf bifurcation diagram that can provide the Hopf bifurcation curves in the-parameter space, for one dimension delay differential equation .
Identification of Nonlinear Systems Using Parallel Laguerre-NN Model
Authors: Zabiri Haslinda , Ramasamy Marappagounder , Lemma Tufa Dendena , Maulud Abdul
Published: September 2013

In this paper, a nonlinear system identification framework using parallel linear-plus-neural networks model is developed. The framework is established by combining a linear Laguerre filter model and a nonlinear neural networks (NN) model in a parallel structure. The main advantage of the proposed parallel model is that by having a linear model as the backbone of the overall structure, reasonable models will always be obtained. In addition, such structure provides great potential for further study on extrapolation benefits and control. Similar performance of proposed method with other conventional nonlinear models has been observed and reported, indicating the effectiveness of the proposed model in identifying nonlinear systems.
Using GM(1,1) to Clean-Table Offensive Techniques
Authors: Yu Tien Kuei
Published: September 2013

The objective of this thesis is to make a position play for a billiard robot in a nine ball pool game by the Grey System Theory. The position play is the placement of the cue ball on the best position to the next planned shot. The robot is able to decide a shooting mode with a corresponding shooting strength from the developed data base of rebound paths of the cue ball. The rebound paths are calculated and recorded from four shooting modes (free shot, cushion shot, bank shot, kiss shot) with five different shooting strengths by the collision theory in a PC. The continuous position play is called the clean-table in the pool game. The moving path of object ball and cue ball are calculated by the collision theory. The grey decision making is developed to find out the best position of cue ball after shooting for the position play. The decision factors are the block ball, the shooting angle, the distance between the object ball and the pocket, and the distance between the object ball and the cue ball. The first priority of the position play is to choose the corresponding object ball and the rebound path of cue ball without any block ball. Then, the second priority is to choose the higher successful pocketing rate (large than 60%). Finally, the offensive decision is set up to make a position play by the Grey Decision-making Sub-system. The experimental results show this clean-table offensive system works very well in the pool game.
Existence and Blow-Up of Solutions for a Degenerate Semilinear Parabolic Equation
Authors: Ran Yan Ping , Peng Cong Ming
Published: September 2013

This article considers the following degenerate semilinear parabolic initial-boundary value problem,where be constants. We obtained the conditions of global existence and blow-up.
Application Research of AHP in Project Risk Management
Authors: Yang Qiang , Zhang Yu
Published: September 2013

This paper analyzed the characteristics of project risk as vague, uncertain and difficult to be accurately defined and quantified which make it usually difficult to be solved by the traditional methods. This paper studied the factors of project risk and build the level structure of risk factors and risk prevention measures. Finally, the paper analyzed the process to account the judgment matrix of project risk and the relative weight of the risk factors. The results show that as a multi-criteria decision-making method, AHP can be used effectively in the project risk management even with less historical data.