bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Variations of Corner and Load on Bottom Ball Joint of Deep-Water Drilling Riser
Authors: Tan Qiang , Yuan Jun Liang , Deng Jin Gen
Published: May 2013

As the offshore drilling expands to deep water, the influences of bottom ball joint corner and lateral force on drilling security become increasingly significant. During the force analysis, the environmental factors (e.g. wind, sea-flow force, sea ice, etc.) are usually taken into account. Besides, the engineering factors considered in research are top tension ratio and drilling vessel drift. In this paper, a finite element model is established by ANSYS to imitate the force condition of marine riser, so as to analyze the influence laws of top tension ratio and drilling vessel drift rate on marine riser stability (i.e. the corner and lateral force on bottom ball joint ) in Beaufort force scale 3 and 8 windy conditions. The results show that the lateral force increases with the drilling vessel drift rate and top tension ratio accordingly by linear mode. For the same tension increasing extent, the greater the drilling vessel drifts, the more increasing range the lateral force appears. The corner on bottom ball joint has a linear relation with the drilling vessel drift rate similarly. However, the corner on the bottom ball joint demonstrates a non-linear decreasing method as “fast followed by slow” due to the increasing top tension ratio. The research plays a role in the security assurance of sub-sea wellhead in deep-water drilling operation.
Soft-Sensing Method for Flow of the Variable Speed Drive Constant Pump
Authors: Jia Yong Feng , Gu Li Chen , Tian Qing Qing
Published: May 2013

According to characteristics of permanent magnet synchronous servo motor driven constant pump hydraulic system, and relevant parameters of the motor, the pump and the oil, an indirect measurement system for flow based on soft-sensing model is established. The measurement of the output flow of constant pump is realized easily by measuring the speed of the motor. And the accuracy of measurement of the model has been improved with the oil viscosity-temperature behavior, viscosity-pressure characteristic and the conditions fuzzy compensation coefficient. Experimental results show that the soft-sensing model is of enough accuracy and has an excellent response.
Application of Energy-Saving Technology about Integrated Control at Cluster Well Group
Authors: Liu Yi Shan , Wang Lin Ping , Zhang Qian , Wei Li Jun , Qin Chuan
Published: May 2013

This paper describes the cluster well central controlled energy-saving device developed for aiming at low efficiency, large energy consumption characteristics of the cluster apheresis well group. The search is based on the oil well production parameters, takes account of the main factor influencing the efficiency of the system of machine production wells, and integrates the following energy-saving innovation technologies: the soft-start control, the dynamic power factor compensation, a common DC bus, stepless frequency converter parameters, and dynamic power adjustment. It realizes the following purposes: optimizing the well production parameters, solving the low running efficiency and large power consumption of the pumping unit, improving the group of low-yielding plexus wells pumping system efficiency, saving energy in scale.
Research and Application of Energy-Saving Technology about Intelligent Parameter Adjustment for Pumping Unit
Authors: Liu Yi Shan , Zeng Ya Qin , Wang Lin Ping , Yang Hui Feng , Wang Man
Published: May 2013

In view of problems that the oil wells are low efficiency and high energy consumption in Changqing oilfield, based on production parameters of oil wells, and in the light of main factors that influencing system efficiency of artificial lift well, developing the intelligent parameter adjustment technology based on dynamic liquid level monitored on-line and automatic balancing technology for pumping unit rely on digitized platform, we have developed intelligent parameter adjustment energy saving device for pumping unit, which achieving digitized upgrade of pumping unit, and reaching the purposes of improving efficiency and saving energy. Meanwhile, the device can reduce the labor intensity of the staff, prolong life of pumping installation, taking back investment within three years, therefore, the device has a good prospect of popularization.
Oil and Gas Pipeline Residual Strength Research Based on Reliability Analysis
Authors: Zhang Xian Yong , Feng Jin
Published: May 2013

Strength of residual wall thickness reliability was studied by Monte-Carlo and finite element method, based on 40in X70 steel and 48in X80 steel which were often used in oil and gas transport pipeline. Pipe with defects in different residual wall thinkness, calculated the critical residual value of wall thickness, and analysed the defect depth and width of influence on pipe reliability. The results provide basis for pipeline safety evaluation and reasonable replacement.
Development of Drilling Engineering
Authors: Ming Liao
Published: May 2013

This paper describes a brief history of the drilling project, a detailed exposition of modern deviation control and drilling fast technology. It is the characteristics analysis and elaboration of the conventional pendulum drill, High WOB Deviation Control, screwdrill and turbodrill. Then, it is pointed out that the most advanced drilling method which is rotary steerable drilling tool, and the ultimate development direction which is intelligent well technology. It is pointed out typical composition and purpose of the intelligent well system.
Microcor Corrosion Monitoring Technology and its Applications
Authors: Pi Yan Hui , Zhang Chun , Liao Ke Xi , Sun Ou Yang
Published: May 2013

With the purpose of comprehensive understanding of the oil and gas pipeline corrosion factors and formulating correct anti-corrosion programs, working principle, technical characteristic, monitoring procedures, application examples of Microcor corrosion monitoring were described in this paper. Compared with commonly used corrosion monitoring technology such as weight loss method, linear polarization resistance method, resistance probe method, Microcor corrosion monitoring has the advantages of high sensitivity, wide application, stable performance, fast response and high resolution. Microcor corrosion monitoring corrosion is the ideal test technology of corrosion process monitoring and corrosion process control, especially for the inhibitor effect evaluation.
Key Parameters Simulation and Design of Natural Gas Engine Based on Diesel
Authors: Liu Meng Xiang , Liu Xiang Ling , Gong Jin Ke , Yang Fei , Chen Jian Bin
Published: May 2013

In the paper, the natural gas engine (NGE)model based on AVL BOOST software is built and simulated. The simulation value and experiment value coincide, showing that the NGE model is correct and reasonable. On this basis, the model has been used to analyze the effect of the key parameters, such as compression ratio, ignition advance angle, valve timing, supercharging ratio on the engine power, maximum combustion pressure, exhaust temperature, the maximum rise rate of pressure. Combined with the relevant theories of engine, the value ranges of the key parameters can be designed. The research achievement is valuable in the development and optimization matching of the NGE.
Study on Nonlinear Dynamic Characteristic of Gearbox Based on Explicit Dynamic
Authors: Liang Ming Xuan , Yuan Hui Qun
Published: May 2013

Considering the drawbacks of existing dynamics research of gearbox system, the dynamic analysis method based on perfectly elastic body is presented. A certain type of marine gearbox is taken as investigation object based on Abaqus/Explicit dynamic finite element program, the dynamic contact nonlinear model of gearbox system is established considering the coupling effect of each component, dynamic simulation of the gearbox system is carried out. The results show that, in the gearbox coupling model, the coupling effects among the bearing, the housing and the gears cause the dynamic characteristic of the gear transmission system more complex, which exacerbates shock effect of the gearbox, the model which considered coupling among the components is closer to the real working condition. The research has certain reference value for gearbox dynamic characteristic optimization.
Equipment Selection Requirements of Offshore Drilling
Authors: Tang Hai Xiong , Wang Jia Wei , Liu Zheng Li , Liu Weian , Wang Peng , Feng Ding
Published: May 2013

Compared with onshore drilling, offshore drilling condition is extremely complex,more security requirements are needed. According to the characteristic of offshore drilling, this paper states the ruler and safety requirement selection of offshore device, including: types of platform, load of rig, position system, BOP, and riser system. List the relevant calculation formula, technical parameters, presents the main requirement of the equipment selection.
A Novel Islanding Detection Method for Inverter-Based Distributed Generation Systems
Authors: Xie Dong , Zhang Xing
Published: May 2013

In the area of renewable energy technologies, islanding of distributed generation system needs to be prevented due to safety reasons and to ensure quality of power supplied to the customers. Several islanding detection methods based on passive and active schemes have been proposed in the literature. Passive methods have a large non detection zone (NDZ), While active schemes degrade power quality. This paper proposed a new passive islanding detection method which combines the Wavelet-transform and neural network techniques. This method can reduce the NDZ to zero without any perturbation that deteriorates the power quality. The simulation results show that the proposed islanding detection method is effective and robust in all kind of conditions.
Digital Image Hiding Using Iterative Blending in Discrete Cosine Transform Domain
Authors: Wang Xin , Sun Xian Ge
Published: May 2013

In this paper,the technology about still image copyright protection are analyzed and discussed.We will do the iterative blending calculation of the image using the discrete cosine transform to achieve the hiding of the digital image. In this paper, we show the main idea of the discrete cos transform and the digital image blending at first, then through using the methods of the iterative blending of single image to realize the propose of image hiding. At the same time ,we get the results analysis through the calculation of the pictures ’s PSNR.
The Median Filtering of Digital Image Based on MATLAB
Authors: Wang Hai Qiang , Sun Xian Ge
Published: May 2013

In the processing of image de-noising, median filtering is a more common nonlinear filtering technique. In this paper, we used the image processing toolbox in the matlab and the adaptive filter program by ourselves. The noise in different intensity of image is reduced. This paper discussed the problem that how we choice of the filtering method under different noise intensity. The results show that median filter can realize effective filter under low noise intensity, if the noise intensity is excessively large, the adaptive filter having a more ideal filtering result than that of standard median filter.
Identification of Tool Wear Condition Based on Generalized Fractal Dimensions and BP Neural Network Optimized with Genetic Algorithm
Authors: Zhang Kai Feng , Yuan Hui Qun , Nie Peng
Published: May 2013

Based on multi-fractal theory, the generalized fractal dimensions of acoustic emission (AE) signals during cutting process were calculated using improved box-counting method. The generalized dimension spectrums of AE signals for different tool wear condition were gained, and the relation between tool wear condition and generalized dimensions was analyzed. Together with cutting process parameters, the generalized fractal dimensions were taken as the input vectors of BP neural network after normalization. The initial weight and bias values of BP neural network which was used to classify the tool wear condition were optimized with Genetic Algorithm. The test results showed that the method can be used effectively for the identification of tool wear condition.
Communication Module Design for BCM Based on AUTOSAR Specifications
Authors: Qi Li Wei , Cheng Ai Guo , He Zhi Cheng
Published: May 2013

Focus on the compatibility problem of the software development, according to the modular and hierarchical design method, the paper researches and designs the communication module of BCM using the design method that based on the Automotive open systems architecture. Finally, the paper builds a network model for the BCM communication module using the software of CANoe, and to verify the performance of the communication module that designed for the BCM, a hardware-in-the-loop test is conducted through introducing the true BCM, and the results obtained in this test indicate that the communication module designed in this paper can provide a dependable and real-time communication services for the BCM, and the design method can improve the compatibility of the software.
Virtual Manufacturing and Components of Virtual Reality
Authors: Bamodu Oluleke , Ye Xu Ming
Published: May 2013

This paper looks into virtual manufacturing in general and at the features and components of virtual reality systems used in removing limitations imposed on virtual manufacturing by traditional CAD/CAM systems where virtual manufacturing borrows largely from.
The Frame Design and Analysis of the Postal Assisted Bicycle
Authors: Xiang Zhong Xia , Luo Huan , Yang Xi , Chang Zhen Yuan
Published: May 2013

A postal assisted bicycle frame is designed according to the demands of the market. And the three-dimensional modeling software is used to establish the three-dimensional model of the bicycle. Using the model of the bicycle and combined with the actual riding positions, the mechanical properties of the bicycle are analyzed by the software of finite element analysis under different riding situations. According to the analysis results, the size of the bicycle frame is changed to improve the mechanical properties of the bicycle. And these changes receive a very good result from the final analysis of the postal assisted bicycle.
Full Hydraulic and Control Systems Application in Open-Cut Mine Drill
Authors: Zhang Ji Ping , Han Xin Ping , Ma Shi Jin , Zhang Jing Cheng
Published: May 2013

The LWD-200B full hydraulic open cut mine drill's hydraulic system uses a variable displacement pump with load sensing constant power, load sensitive electromagnetic proportional multi-way directional valve, high torque hydraulic motor overhead direct drive rotary head, a long stroke hydraulic cylinder and steel wire rope and pulley speed lifting system, hydraulic cylinder to drive the unloading rod mechanism, hydraulic motor driving crawler, double hydraulic cylinder lifting the drill frame mechanism, a hydraulic motor driven cable winding drum, hydraulic legs leveling method. Control system adopts the control handle and the PLC control mode, with real-time data acquisition, computer automatic recognition of lithology and closed loop feedback control and GPS precise positioning function, to achieving the automatic or manual drilling, specified depth or level drilling. Through the test of practice, it is a multifunctional, fully hydraulic, which is intelligent and efficient perforation equipment.
A New Support Structure in Waverider Force Measurement
Authors: Zhao Xue Jun , Guo Xiao Guo , Zhao Chang
Published: May 2013

In this paper a new support structure was given to solve the problem met in the force measurement with engine jet. The force measurements of waverider were undertaken in the hypersonic wind tunnel. The test condition was at Ma=6, angle of attack α=-6°-6°, at which we researched the effects on the vehicle aerodynamics of inlet cowl opening and closing, support system, engine jet, and pressure ratios. To decrease the effects of strut on the jet flow-field, we took sharp belly strut to support the model in the wind tunnel. The belly strut could support the waverider model, force measurement balance, and it could make the inlet flow set up, and provide the high pressure jet. The test results showed that the belly sharp strut had little effects on the flowfield and could inject the inlet flow, and could provide very high quality jet.
Application of Plasma Technology in Surface Modification of Carbon Materials
Authors: Hui Liu , Kong Si Fang , Liu Yang Sheng , Zeng Hui
Published: May 2013

The principle of carbon materials modification by plasma was introduced in this paper. The studies on application of plasma technology in surface modification of carbon materials were reviewed in three main aspects, namely using plasma to improve the catalytic effect, capacitance and adsorption performance of carbon materials. Moreover, the prospects of plasma technology in surface modification of carbon were also discussed.
Histological Study of the Toxic Effects of Solder Fumes on Spermatogenesis in Rats
Authors: Arab Mohammad Reza , Heidari Mohammad Hossein
Published: May 2013

Objective: Toxic fumes generated during the soldering process contain various contaminants released at sufficient rates to cause both short- and long-term health problems. Studies have shown that these fumes change the quality and quantity of semen fluid in exposed workers. The aim of the present study was to determine the potentially toxic effects of solder fumes on spermatogenesis in seminiferous tubules of rats as an experimental model, with conditioned media in an exposed chamber. Materials and Methods: A total number of 48 male Sprague Dawley adult rats were randomly divided into experimental (n=30) and control (n=18) groups. Based on exposure time, each group was further subdivided into two, four and six subgroups. Rats in the experimental groups were exposed to solder fumes in an exposure chamber for one hour/ day. The concentrations of fumes [formaldehyde, stanum (Sn) and lead (Pb)] were measured by a standard method via atomic absorption and spectrophotometry. According to a timetable, under deep anesthesia, the rats of both experimental and control subgroups were killed. After fixation of testes, specimens were weighed and routinely processed. Paraffin sections were stained by hematoxylin and eosin. Spermiogenesis index was calculated and data analyzed by Mann Whitney NPAR test. Results: Analysis of air samples in the exposure chamber showed the following fume concentrations: 0.193 mg/m3 for formaldehyde, 0.35 mg/m3 for Sn and 3 mg/m3 for Pb. Although there was no significant difference in testes weight between control and experimental subgroups, there was only a significant difference in spermiogenesis index between the six week experimental and control subgroups (p<0.02). Conclusion: The results of this study showed that solder fumes can change the spermiogenesis index in experimental groups in a time dependent manner.
Microwave Induced Pyrolysis of Biomass
Authors: Shi Kai Qi , Wu Tao , Zhao Hai Tao , Lester Edward , Hall Philip , Wang Yao Dong
Published: May 2013

Microwave heating has attracted much attention recently due to its nature of volumetric heating and instant heating. In this study, microwave heating was adopted not only as a heating method but also an approach to enhance the pyrolysis of biomass. Microwave induced pyrolysis was carried out at 500°C with silicon carbide as a microwave energy absorber. Conventional pyrolysis of gumwood was also conducted under the same operating temperature as microwave-enhanced pyrolysis. The yields of pyrolytic bio-oil and bio-gas under microwave heating are 8.52 wt% and 73.26 wt% respectively, which are higher than the products obtained via conventional methods under similar operating conditions. A series tests were performed to compare the difference between the yields of pyrolytic products, i.e. gaseous products (bio-gas), liquid products (bio-oil) and solid products( bio-char). Scanning Electron Microscope (SEM), Gas Chromatograph/Mass Spectrum (GC-MS) and Gas Chromatograph (GC) were used in this study to characterize the morphology of bio-chars, the composition of bio-gas and bio-oil respectively. The bio-oil produced via microwave pyrolysis has simpler constituents compared with that produced via conventional pyrolysis. The proportion of syngas (H2+CO) and methane (CH4) in the gas product produced under microwave-enhanced pyrolysis are 62.52 vol % and 22.41vol % respectively, which are higher than those in the products of conventional pyrolysis. It is clear that microwave-enhanced pyrolysis has shown a great potential as an alternative method for biomass conversion.
pH-Effect on Sinterability, Mechanical Properties and Cytotoxicity of Hydroxyapatite-Based Bone Grafts
Authors: Demirel Mehtap , Aksakal Bunyamin , Basak Nese
Published: May 2013

Hydroxyapatite (HA) based bone grafts were synthesized by sol-gel method at various pH values 5, 7, 9 and 12, respectively. In order to ascertain the influence of the obtained bone grafts on the morphology, sinterability and mechanical properties, each composition was sintered at 11500C, and quantitative phase analysis was characterized by XRD and FTIR. The microstructures were studied via SEM-EDX and the validation of mechanical properties was evaluated by compression and Vickers hardness tests. The density of HA synthesis samples with different pH values before and after sintering were measured. Besides, the cytotoxicity analysis were conducted for all grafts having various pH values. The experimental results revealed that the density and mechanical strenght of HA based bone grafts were increased with increasing pH value. The highest hardness and strength were obtained for the samples having pH=12. Furthermore, the samples with pH=12 exhibited the best densification and properties when compared to the samples at pH of 5, 7 and 9. The cytotoxicity tests also indicated that the pH=7-12 value showed no toxicity to osteoblast cells at 0,1 and 0,3 µM concentration, whereas HA synthesis sample at pH=5 value with 0,3 µM concentration induced signiﬁcantly and reduced cell viability.
Fusion, Expression and Identification on the mpb51 and mpb63 Genes of Mycobacterium bovis
Authors: Gao Yun Hang , Wang Chun Fang , Jiang Xiu Yun , Ma Hong Xia , Gao Da Ming , Zheng Yan Ru , Guan Jia Ning , Lin Jia Ming , Hou Shuang , Liu Lie , Li Bing Jie , Li Lu Lu , Ren Fei
Published: May 2013

The DNA fragments of mpb51 and mpb63 were fused by splicing by overlapping extension(SOE) polymerase chain reaction(PCR),and the fusion gene mpb51-63 were cloned into pMD18-T vector, and then we got the recombinant plasmid pMD-51-63. pMD-51-63 and pET28a(+) were digested by BamHI and EcoRI double enzymes. The purified mpb51-63 fusion gene was subcloned into the expression vector pET28a(+),and the prokaryotic expression vector pET-51-63 was constructed. Plasmid containing pET-51-63 was transformed into competence Escherichia coli BL21(DE3).The bacterium was induced by isopropyl-β-D-thiogalactopyranoside(IPTG)and its lysates were loaded directly onto sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE),approximately 43ku exogenous protein was observed on the SDS-PAGE. The protein was analyzed by using Western-blotting. The results indicated that the protein was of antigenic activity of Mycobacterium bovis. These results could serve as a basis for further studies on the usefulness of the fusion gene and its expression product in the development of subunit vaccine, DNA vaccine and diagnostic reagents against bovine tuberculosis.
Prokaryotic Expression and Identication on the 20kDa Protein Gene of Mycobacterium paratuberculosis
Authors: Gao Yun Hang , Wang Chun Fang , Jiang Xiu Yun , Ma Hong Xia , Zeng Fan Li , Hu Yu Qing , Liu Xin Yu , Zhu Xiaoai , Dong Yang Hong , Liu Lei
Published: May 2013

The gene encoding 20kDa protein gene from Mycobacterium paratuberculosis C-2, chromosomal DNA was amplified by using polymerase chain reaction (PCR), the PCR product was approximately 520bp DNA segment. The PCR product was cloned into pGEM-T vector and the cloning plasmid pGEM-T-20 was constructed successfully. The purified 20kDa protein gene was subcloned into the expression vector pET28a(+), and the prokaryotic expression plasmid pET28a-20 was constructed. Plasmid containing pET28a-20 was transformed into competence Escherichia coli BL21 (DE3). The bacterium was induced by isopropyl-β-D- thiogalactopyranoside (IPTG) and its lysates were loaded directly onto sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE), approximately 23kDa exogenous protein was observed on the SDS-PAGE. The protein was analyzed by using Western-blotting. The results indicated that the protein was of antigenic reactivity of M. paratuberculosis. The results were expected to lay foundation for further studies on the subunit vaccine and DNA vaccine of 20kDa protein gene in their prevention against bovine paratuberculosis.
An Application of the Differential Transform Method to the Biochemical Reaction Systems
Authors: Bayram Mustafa , Yildirim Kenan , Kurulay Muhammet
Published: May 2013

An approximate analytical solution for the biochemical reaction systems is derived using the differential transform method. The analytical solution, which is given in the form of a power series, is found to be highly accurate in predicting the behavior of the reaction in the very early stages. To accelerate the convergence of the power series solution and extend its region of applicability throughout the entire transient phase, we used differential transform method theoretical considerations has been discussed and some examples were presented to show the ability of the method for Biochemical reaction systems. We use MAPLE computer algebra system to solve given problems[4].
Novel Silkworm Pupa Protein (SPP)/Polyester Fabric
Authors: Hu Wei , Zhang Guang Xian , Zhang Feng Xiu , Wu Da Yang
Published: May 2013

Polyester has excellent mechanical properties and silkworm pupa protein(SPP) has good biocompatibility. In this paper, polyester was semi-inlaid with sucrose ester, and then grafted with SPP by self-made crosslinking agent. SEM photograph showed after grafting, a layer of compound was covered on the surface of polyester fiber. FT-IR spectra indicated that SPP had been grafted onto the polyester. The wearability testing showed that the SPP/PET fabric exhibited improved wettability and antistatic property as well as suitable crease elasticity and softness.
Study on the Effect of Sericin Content on Solubility of Silk Fibroin and the Properties of Silk Fibroin Membranes
Authors: Jiang Yu Chun , Zhang Yuan Song
Published: May 2013

In this paper silkworm cocoon was dissolved at different time by degumming agents of NaHCO3 to obtain silk fibroins with different content of sericin. Then the silk fibroins was dissolved to get the silk fibroin membranes. The results indicated that the content of sericin had certain effect on silk solubility. As the content of sericin reduced, the dissolution speed was faster and the silk solubility was greater. The properties of the silk fibroin membranes with some sericin were much better than those degummed completely.
PCR Detection of Mycobacterium bovis DNA in Cattle Bloods
Authors: Wang Chun Fang , Gao Yun Hang , Jiang Xiu Yun , Wang Jian , Li Gong Mei , Chen Fei Fei , Qian Ai Dong
Published: May 2013

For molecular biological detection of Mycobacterium tuberculosis, PCR methods with primers targeting different regions speciﬁc for mycobacterium tuberculosis complex are used worldwide. In this study,256 whole blood samples were detected using multiplex PCR.2 of all samples were found to be PCR positive. Homogenous comparison of Mycobacterium bovis specific genes with Mycobacterium bovis AF2122/97 all reached up to 99%.
Extraction Technology and Physicochemical Properties of Broccoli Protein
Authors: Li Na , Zhu Zi Ping
Published: May 2013

In this study, protein is extracted with broccoli stems and leaves as raw material. Meanwhile, the enzymatic technology-assisted extraction and the physicochemical properties of broccoli protein are investigated. Furthermore, the extraction technology of broccoli stems and leaves is optimized by orthogonal experiment. The results show that, the influence of each factor to extraction rate decreases by temperature > pH > time in order. By calculation, the optimal condition is pH 6, temperature 60 °C, extraction time 20 h, and the water holding capacity, swelling property, and cation exchange capability of broccoli protein are 3.32 ±0.10 mL/g, 4.77 ±0.59 g/g, 7.52 ±0.17 mmol/g respectively, which are higher than those of soybean protein.
A New Spectrophotometric Method for the Determination of Trace O3 Using the Particle Reaction of Rhodamine 6G-I3
Authors: Lin Chen Yin , Wen Gui Qing , Liang Ai Hui , Jiang Zhi Liang
Published: May 2013

O3reacted with KI-H3BO3absorption solution to produce I2which can combine with the excess I- to form I3-. In pH 4.0 HAc-NaAc buffer solution, I3- reacted with rhodamine 6G (Rh6G) to form Rh6G-I3association particles, which exhibited a great decreasing at 525 nm. Under the chosen conditions, the decreased intensity ΔA was linear to I2concentration in the range of 0.5×10-6-33×10-6mol/L. Thus, a highly sensitive and selective spectrophotometric method was proposed to detect O3in the air, since the concentration of O3was equal to that of I2in this reacted system.
Oscillatory Calcium Concentration Designed through pH Dependent Equilibrium
Authors: Lv Li Qiang , Ji Lin
Published: May 2013

On the basis of pH dependent CaNa2EDTA complex formation equilibrium, spontaneous periodical oscillation of calcium concentration is realized through the coupling of the equilibrium with the Iodate-Sulfite-Ferrocyanide (ISF) reaction system in continuous stirred tank reactor. The effect of temperature, flow rate and acid concentration on ISF is investigated to seek better oscillation performance. The influences of CaNa2EDTA concentration and external illumination on the Ca2+ oscillation are also discussed.
Melting Temperature of MgO under Pressure
Authors: Zhang Shuai , Chen Lei
Published: May 2013

The melting temperature-pressure phase diagram [Tm(P)-P] for magnesium oxide (MgO) is predicted through the Clapeyron equation where the pressure-dependent volume difference is modeled by introducing the effect of surface stress induced pressure. MgO is a material of key importance to earth sciences and solid-state physics: it is one of the most abundant minerals in the Earth and a prototype material for a large group of ionic oxides.
Synthesis of Core-Shell Particles Consisted of Polysiloxane and Poly(butyl methacrylate-stryrene-acrylonitrile) by Microemulsion Polymerization
Authors: Jia Shao Jin , Ding Zhen Gang , Jiang Ping Kai
Published: May 2013

Latexes with poly(butyl methacrylate-stryrene-acrylonitrile) rich in the shell and PDMS rich in the core were prepared based on microemulsion polymerization. Vinyl monomers were introduced to generate slightly crosslinked particles, then, etamethyltetraeyelosiloxane（D4）was added slowly to form the core. In the process, internal resistance must be overcome when the D4 entered into the polymer to form the core. The compatibility between the two polymer phases was changed by introducing acrylonitrile and the effect of different methods on forming latex particles was discussed.
Low Temperature Synthesis of High Quality Zirconium Carbide Powder
Authors: Zhang Shao Wei , Wen Yan , Yeprem H. Aygul
Published: May 2013

Pure submicron-sized ZrC powder was successfully synthesized in KCl by using ZrO2, Mg and carbon black as the starting raw materials. KCl showed strong accelerating effect on the molten salt synthesis. As a result, the reaction temperature was reduced to as low as 800oC, which is much lower than the temperatures used by most of the other synthesis techniques reported so far. It is believed that both ZrO2 and carbon black had acted as the “templates” in the synthesis process. High quality ZrC powders prepared with the present technique could be used for making important ZrC based composites for various applications.
Distribution and Intensity of the Built-in Field in Poled Silica Thermally Based on a Junction Model
Authors: Ren Yi Tao , Dai Zhen Quan , Wang Jian , Duan Jin Yan
Published: May 2013

Formation of depletion region and the charge distribution are analyzed using multi-charges’ migration under a polling field in fused silica. The internal fields induced are calculated based on a junction model. The field distributions and their intensities within the whole depletion inside the silica are calculated. The maximum field is on the order of 109 V/m in a abrupt junction, and the optical nonlinearities generated by this internal field are consistent with the experimental results published, which proves the junction model is reasonable and feasible to calculate optical nonlinearity in air by thermal polling.
Pickering-Type Emulsions of ODSA Sizing Agent Stabilized by Nano-Montmorillonite and N-Dodecane
Authors: Yu De Hai , Lin Zhao Yun , Li You Ming
Published: May 2013

Octadecenylsuccinic anhydride (ODSA) is an internal sizing agent used to hydrophobize paper and paper board in the process of papermaking. Nano-montmorillonite (MMT) particles and n-dodecane were used as the stabilizer to prepare stable ODSA Pickering emulsions. The effects of pH value, particle concentration, hydrolysis resistance and paper sizing performance of the ODSA Pickering emulsions were investigated. It was found that the stability of ODSA emulsions first increased and then decreased as the pH value decreased. More stable oil-in-water (o/w) emulsion can be made using 10 vol.% n-dodecane. Particle concentration was linked to the formation of particle films at oil–water interface, with a required minimum particle concentration of 1.5 wt.%. Paper sizing degree analysis indicated that the ODSA Pickering emulsions show increased hydrolysis resistance and good sizing performance.
Adsorption of 4-Chlorophenol onto Activated Carbon Prepared from Wheat Straw: Equilibrium Study
Authors: Li Yi Ke , Wang Ya Dong , Zhang Yang , Han Run Ping , Li Yan Qiang
Published: May 2013

The adsorption studies of 4-chlorophenol from aqueous solution on activated carbon derived from wheat straw (WAC) have been performed. Several experimental parameters like initial pH, p-CP concentration and solution temperature were evaluated. Solution pH within 2-8 is favor of adsorption and it is disadvantage of adsorption at higher temperature. Langmuir and Freundlich isotherm models were used to fit the experimental data and Langmuir was better. The maximum capacity was 64.8 mg g–1 at 293 K. The process is spontaneous and exothermic and physical action is major mechanism.
The Biomass Control in a Biochemical Reactor Process with Time-Varying Dilution Rate: A Mathematical Study
Authors: Yuan Tian
Published: May 2013

In this paper, a continuous bioprocess model with single species for an inhibitory growth-limiting nutrient is considered, where the dilution rate is time varying and controlled by a critical cell concentration in the bioreactor. It is shown that the model has rich dynamics. A coexistence equilibrium and the washout equilibrium can be asymptotically stable simultaneously so that coexistence may depend on initial conditions.
The Application of Color Symbol to Product Design
Authors: Li Yuan , Yin Huan , Hui Chen Xin , Zhao Yu , Zhu Hao Quan
Published: May 2013

This paper analyzes the connotation of symbol and its extension meaning, and it emphatically elaborates the basic concept of color symbol, the emotion that colors deliver to people, and people’s identity of colors. Through analyzing color symbol and combining with the understanding of the general procedure of product color design, it proposes to make use of color symbol editing, decoding, and color quantitative inductive analysis to guide the idea of color design of products. In particular, it expounds that reasonably sorting out the color system of relevant products can be used for color design of subsequent products, so as to perfectly combine color application with product design, to make colors give strong life and power to products.
The Study on the University Sports Teams in Information Management
Authors: Peng Yi
Published: May 2013

Using information management system to manage the establishment of university sports teams provides the coaches with support for the daily training and with basis for quantitative analysis and improvement of the athletes’ training load and function. Thereby, athletes’ comprehensive qualities and training level can be improved overall, as well as the overall level of the university sports team.
Batch Gating for Data Association in Monocular SLAM
Authors: Guerra Edmundo , Munguia Rodrigo , Bolea Yolanda , Grau Antoni
Published: May 2013

This work describes the development and implementation of a single-camera SLAM system, introducing a novel data validation algorithm. A 6-DOF monocular SLAM method developed is based on the Delayed Inverse-Depth (DI-D) Feature Initialization, with the addition of a new data association batch validation technique, the Highest Order Hypothesis Compatibility Test, HOHCT. The DI-D initializes new features in the system defining single hypothesis for the initial depth of features by stochastic triangulation. The HOHCT is based on evaluation of statistically compatible hypotheses, and search algorithm designed to exploit the Delayed Inverse-Depth technique characteristics. Experiments with real data are presented in order to validate the performance of the system.
Crystal Structure and Luminescence of SrAl2O4: Eu2+,Dy3+ Phosphor Prepared by Nano-Pseudoboehmite Particulate Peptizing Method
Authors: Zhu Fu Liang , Meng Yan Shuang
Published: May 2013

Eu2+, Dy3+co-doped strontium aluminate (SrAl2O4) phosphor with high brightness and long afterglow were prepared by nano pseudo-boehmite particulate sol method. The precursor was prepared by peptizing AlOOH powders with HNO3 as peptize agent. The influence of preparation parameters on crystal structure and luminescent properties of the phosphor have been studied systematically. Monoclinic SrAl2O4host with single-phase can be obtained by controlling sintering temperature at 1200°C, 4Wt%B2O3 and RSr/Al=0.34. The sample exhibits an intensive emission peak at 515 nm and the luminescent intensity decay with I=277.78t-1.079 .
A BOC Signal Synchronization Algorithm Based on TK Operator
Authors: Deng Zhong Liang , Yang Lei , Yin Lu , Xi Yue
Published: May 2013

The binary phase shift keying (BPSK) modulation method is generally utilized for the traditional navigation satellite systems; however, the new generation of GNSS, such as modernized GPS, European Galileo, Chinese Compass, etc., will apply binary offset carrier (BOC) modulation technique, which can efficiently split the spectrums of navigation signals using the same frequency so as to reduce the interferences among different systems. But the autocorrelation function of BOC modulated signals has the drawback of multimodality, so it’s very hard to synchronize to the right peak when acquiring and tracking signals, especially under low SNR circumstances, which can decrease the positioning accuracy and even lead to wrong positioning results. A BOC modulated signal synchronization algorithm based on TK (Teager-Kaiser) operator is proposed in this article, which could eliminate all the other peaks in autocorrelation function of BOC modulated signals, and create an ideal curve with only one right peak. As a result, this method could avoid the false lock of code phase and guarantee the high precision fix results.
Image Processing Algorithm for the Manipulation of Object Using 3D Sensor
Authors: Kim Dong Whan , Ha Jong Eun
Published: May 2013

Recently, cheap 3D sensor such as Kinect is widely used in diverse applications. In this paper, we use Kinect as the 3D sensor for the object manipulation using robot arm. Our target is insert objects on the horizontal table into the corresponding location on the hole in the vertical plate. First, we find two dominant planes corresponding to the horizontal and vertical table by processing 3D points by Kinect. Then, we find each object on the horizontal table using contour processing. Also, object on the vertical plane is processed using the same algorithm. Finally, object matching is done using Hu invariant moments.
Design of WSN Gateway for Granary Information Monitoring
Authors: Qiao Chang Fu , Yin Shou Yi , Ling Li , Cheng Ren Jun , Xu Chang Liang , Wang Jun
Published: May 2013

With the rapid development of wireless sensor network, the request of granary monitoring is pointed out to connect wireless sensor network with Internet. The gateway is one of the most important parts. By analyzing the interconnection between wireless sensor network and Ethernet, combining with the granary monitoring needs, a gateway solution based on high-performance network processors and embedded real-time operating system is designed. And transparent transfer of data between the wireless sensor networks and the Internet is realized.
Feature Selection Based on Ant Colony Optimization for Image Classification
Authors: Tu Li , Yang Li Zhi
Published: May 2013

In this paper, a feature selection algorithm based on ant colony optimization (ACO) is presented to construct classification rules for image classification. Most existing ACO-based algorithms use the graph with O(n2) edges. In contrast, the artificial ants in the proposed algorithm FSC-ACO traverse on a feature graph with only O(n) edges. During the process of feature selection, ants construct the classification rules for each class according to the improved pheromone and heuristic functions. FSC-ACO improves the qualities of rules depend on the classification accuracy and the length of rules. The experimental results on both standard and real image data sets show that the proposed algorithm can outperform the other related methods with fewer features in terms of speed, recall and classification accuracy.
Measurement on Reaction Time of Visual Attention in Depth during Driving
Authors: Xia Ru Ting , Zhou Xiao Yan
Published: May 2013

This research aimed to reveal characteristics of visual attention of low-vision drivers. Near and far stimuli were used by means of a three-dimensional (3D) attention measurement system that simulated traffic environment. We measured the reaction time of subjects while attention shifted in three kinds of imitational peripheral environment illuminance (daylight, twilight and dawn conditions). Subjects were required to judge whether the target presented nearer than fixation point or further than it. The results showed that the peripheral environment illuminance had evident influence on the reaction time of drivers, the reaction time was slow in dawn and twilight conditions than in daylight condition, distribution of attention had the advantage in nearer space than farther space, that is, and the shifts of attention in 3D space had an anisotropy characteristic in depth. The results suggested that (1) visual attention might be operated with both precueing paradigm and stimulus controls included the depth information, (2) an anisotropy characteristic of attention shifting depend on the attention moved distance, and it showed remarkably in dawn condition than in daylight and twilight conditions.
A Method for Completeness Testing of Dimensioning in 2D Drawing
Authors: Sui Tian Zhong , Tan Zhen , Wang Lei , Gu Xiao Bin , Ren Zhao Hui
Published: May 2013

Dimensioning work is a considerably important link in the whole Engineering Drawing. For existing completeness testing of dimensioning, correct conclusion can not be drawn in case of multi-closed dimension. This paper mainly discusses the ways how to automatically check up the deficiency and redundancy of the dimensions. This paper presents a new and effective algorithm to test whether the dimensions are redundant or insufficient by means of the graph theory and intelligent search. The dimensions are transformed to non-directed graph, then detects whether they are redundant or insufficient by traversing adjacent matrix of the non-directed graph. The deficiency and redundancy of dimension for multi-views of engineering drawing can be corrected by this algorithm.
The Simplication Algorithm and Characteristic Analysis of Variable Cross-Section Beam of Machining Center
Authors: Yao Xiao Peng , Yin Guo Fu , Fang Hui
Published: May 2013

According to the spatial arbitrary cross-section beam simplification redundancy and coupled problem of model constraint mutually relation, for the variable cross-section beam of 5-axis gantry machine tools, a new beam simplification algorithm and the average second inertia concept is created by structural mechanics theory. Under gravity and cutting load of beam, It applied simplification algorithm and finite element analysis software (Nastran) to study the static and dynamic characteristic comparatively, deformation relative errors are less than 5%. The modal analysis of beams get the order natural frequency and vibration mode, contrast analysis with experimental value, the relative errors are less than 9% each other. Through theoretical analysis and experimental data shows that the simplification algorithm is practicability and accuracy, it play a role in the key components of machine tools analytical characteristics and machine tools of performance prediction.
The Segmentation Algorithm for Pavement Cracking Images Based on the Improved Fuzzy Clustering
Authors: Zuo Yong Xia , Wang Guo Qiang , Zuo Chun Cheng
Published: May 2013

The segmentation technology of pavement cracking image is critical for identifying, quantifying and classifying pavement cracks. An improved fuzzy clustering algorithm is introduced to segment pavement cracking images. The algorithm makes no assumptions the initial position of clusters. For each value of the multiscale parameter, it obtains a corresponding hard partition. The different partitions values of the multiscale parameter indicate the structure of the image in different partitional scales. The algorithm was tested on actual pavement cracking images. We compared the results with FCM and OTSU to show that the improved fuzzy clustering algorithm can provide better crack edges.
Catalytic Spectrophotometric Determination of Trace H2O2 Using Fe3O4 Nanoparticles as Peroxidase Mimetics
Authors: Ouyang Hui Xiang , Liang Ai Hui , Tian Jian Niao , Jiang Zhi Liang
Published: May 2013

In the media of pH 2.72 HCl-NaAc, Fe3O4 nanoparticles in size of 10 nm exhibited strong catalytic effect on the slow reaction of H2O2 and the substrate dopamine (DA) to form dark red small molecule polymer particles, which exhibited two absorption peaks at 305nm and 435nm. In the optimum conditions, as the concentration of H2O2 increased, the absorption value at 300 nm increased linearly. The increased absorption intensity (ΔA305nm) was linear to the H2O2 in the range of 0.5-35 μmol/L, with a linear regression equation of ΔA305nm=0.014C +0.043, a relative coefficient of 0.9997 and detection limit of 0.13 μmol/L H2O2, respectively. The proposed method was applied to detect H2O2 samples, with satisfactory results.