bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Method of Non-Uniformity Control in Asphalt Pavement Construction with PQI
Authors: Zhao Zhi Sheng , Jing Tao , Yan Hai Feng , Zhang Xiong
Published: October 2011

Non-uniformity of the asphalt pavement is one of most important reason for early disease, control of non-uniformity in the production process of asphalt pavement is an important measure to ensure that quality and service life of pavement. Nuclear density gauge (PQI) can be non-destructive, rapid detection of asphalt pavement density. This paper give a research and application on the PQI calibration, testing frequency, the control parameters and evaluation index, and proposes a control method of non-uniformity in asphalt pavement construction with PQI. Asphalt pavement quality control in construction process can use this method. It is important to improve the stability of asphalt pavement quality and reduce the incidence of disease, and also has a certain reference value for establishing the quality control and quality assurance systems.
A New Method for Residual Liquid Inspection
Authors: Huang Bin , Li Jiang Feng , Fu Wei , Yang Dong Ying
Published: October 2011

Residual liquid inspection is an important process before filling up in the beer filling line. It aims to inspect that whether there is residual alkali liquid in the inspecting bottles and improve the quality of the beer. At present, manual inspection can’t meet the requirements of high filling speed and high-accuracy inspection. While the automatic residual liquid inspection system at present has some defect such as poor security, low accuracy and reliability. Therefore, this paper proposes a new method for residual liquid inspection which is based on the principle of capacitive coupling and has realized non-contact measurement for residual liquid remaining in empty bottle. The inspection prototype is also designed for detection. In order to further improve detection reliability, the statistical process control method is also introduced in the residual liquid inspection system. According to experiments, it is indicated that this method can effectively improve accuracy, reliability and security of the detection and has high practical value.
Study of Expressway Lane Departure Warning and Navigation System under Different Visibility Conditions
Authors: Yang Yong Mei , Sun Nai Quan , Xu Hong Ke
Published: October 2011

In order to improve the safety of driving under different visibility meteorological conditions on the expressway, this paper analyses the composition and operation principle of the expressway lane departure warning and navigation system based on machine vision. And an effective lane mark identification algorithm suiting for different visibility situations is proposed. Firstly the image contrast between the expressway lane and its background is increased by using histogram equalization technology, improving detecting range of lanes and accuracy. Secondly the edges in the lane directions are detected by utilizing specific Sobel operator. In order to suit for different visibility situations and improve detecting efficiency, the method of maximum classes square error is applied to threshold segmentation. Finally, lane is abstracted according to expressway lane features after image Hough transform. Based on lanes identification, this paper designs a navigation algorithm of driving direction. This algorithm performs driving direction navigation decisions according to two characteristic parameters which are deviation angle and deviation distance. The experimental results indicate that the developed system exhibits good detection performances in recognition reliability and navigation decision. It has proved that this system has high accuracy, large detection range and high practicability.
Study on Design and Experiment of SAW Device Based on MSC
Authors: Wen Chang Bao , Ju Yong Feng , Liu Li , Jiang Ya Fei , Zhao Chen , Wen Li Min , Li Yan Ming
Published: October 2011

In the design process of surface acoustic wave (SAW) device based on multistrip coupler (MSC), the characteristics of interdigital transducer (IDT) and device can not been directly achieved, and the layout structure of device can not be observed and checked. To solve some problems, the design platform of SAW device based MSC was realized in the Matlab design environment using the modular design. The design platform of SAW device based MSC consists of layout simulation module, characteristics simulation module and data output module. By means of realizing a SAW device based MSC with center frequency at 51.293MHz, the comparison and analysis between the design results and the actual test results are presented. Experiments results confirm that the platform can correctly design the device layout. The device characteristics achieved by the design platform are in good agreement with the actual measurement results by the network analyzer.
The Analysis and Simulation of PSM Single-Module Based on Simplorer
Authors: Hao Xu , Huang Yi Yun
Published: October 2011

The power supply system of the LHCD heating systems of Tokamak (EAST) is required to be reliable and have good dynamic performances. In this thesis, an optimization model of the Single-module of PSM power source is proposed to analyze its dynamic performances theoretically and the special simulation tools in SIMPLORER are used for the modeling and simulation of the system.
The Effect of Leachate Collection Layer Structure on Leachate Quality in Semi-Aerobic Landfill: A Pilot Study
Authors: Liu Guo Tao , Zhang Zhen , Peng Xu Ya
Published: October 2011

Due to the leachate collection layer’s good ventilation and leachate leaching role, aerobic bio-filter bed for treating leachate can be formed in the bottom of the semi-aerobic landfill. Six groups of simulated semi-aerobic landfill columns were used, whose leachate collection layers were 60mm gravel (1#), 120mm gravel (2#), 180mm gravel (3#), 240mm gravel (4#), 180mm cobblestone (5#), and 180mm gravel with 60mm ceramsite on the surface (6#) respectively. This paper researched the influence of leachate collection layer structure on the oxygen volume fraction in semi-aerobic landfill as well as the leachate concentrations of COD, NH4+-N, organic nitrogen and sulfate. The results showed that the oxygen volume fraction declined according to the sequence of upper-layer, middle-layer and lower-layer. After 22 weeks, the leachate COD removal rate of 1#, 2#, 3#, 4#, 5# and 6# reached 92.64%, 95.18%, 94.48%, 96.44%, 92.06% and 96.39%, respectively. The concentrations of NH4+-N were reduced respectively from the initial 1670.3, 1704.1, 1866.2, 1873.0, 1920.3 and 2116.2 mg/L to 117.8, 119.2, 123.2, 101.6, 635.4 and 200.3 mg/L, and the phenomenon of ammonia nitrogen concentration gradually rising did not appear. Leachate concentration of sulfate could be increased through semi-aerobic landfill and less H2S gas was produced. Increasing the leachate collection layer’s height would help to improve the removal effect of leachate, and gravel collection layer was better than that of cobblestone. Adding ceramsite on the surface of gravel collection layer would help to increase the removal rate of leachate at the later stage.
Research on Numerical Analysis and Application of the Tailing Pond
Authors: Zhang Li Ting , Qi Qing Lan , Li Qiang , Zhang Jun
Published: October 2011

Determining the location of infiltration ascender line is a key problem to analyze the 3-D seepage field of the tailing pond. As the location of infiltration ascender line is determined by the actual water edge, the calculation location of saturated surface is lower because of no considering the discharge of the mineral water or the flood. When the location is determined by the direct conversion of dry beach length which is suggested in the standards, the calculation location of saturated surface is higher than the measured value. To get the actual location of saturated surface, a new method is suggested to determine the location of infiltration ascender line, called “the indirect conversion method” in the paper. On the basis of the new method, the numerical simulation is carried out to analyze the 3-D seepage field, and the numerical results are compared with the testing results to prove the rationality of the new method.
Study of Ventilation Character for an UFAD Room with Cooling Wall
Authors: Li Xiao Hua , Lin Dao Guang
Published: October 2011

This study mainly investigated the wall temperature affects on the ventilation performance of the UFAD system with multi-zone mode simulation and experiment methods. A room which has dimensions 4.4×2.7×2.5m and consists of a single source of heat and a cooling wall was developed. Laboratory experiments were carried out to measure the air temperature distribution of the main space and the cooling boundary layer under three cases. From the model simulated and the experimental results it is obvious that the stratification in the room disappears as the temperature of the cooling wall decreases, the downdraught generated by the cooling wall reverses with the main zone airflow. The conclusions can provide the guidance on designing the UFAD systems.
Studies on Phytoplankton and Particulate Organic Carbon in the Southern Ocean
Authors: Zhu Gen Hai , Liu Yan Lan , Chen Li Hong , Yu Pei Song , Jin Mao , Liu Zi Lin
Published: October 2011

Using China Southern Ocean’s study data collected from 1989 to 2009 year, this paper analyzed the related characteristics between phytoplankton abundance, Ch1 a concentrations and particulate organic carbon. The average cell abundance of Southern Ocean phytoplankton was 7.38×104 cells/dm3. The dominant species of Southern Ocean phytoplankton were Fragilariopsis kerguelensis, Fragilariopsis curta, Pseudo-nitzschia lineola, Eucampia antarctica, Thalassiosira antarctica and Corethron criophilum and son on. In Prydz Bay of the Southern Ocean, the contribution of phytoplankton cell abundance and phytoplankton carbon toward particulate organic carbon were higher than that in the Northern Gulf Ocean Area. In the upper layer of euphotic zone, the contribution of phytoplankton abundance and phytoplankton carbon toward particulate organic carbon were higher than that in the deep water district. Through analysis of regressive statistics, phytoplankton cell abundance (y) and particulate organic carbon (POC) and chlorophyll a (Chl a) were a remarkable positive correlation.
Study of Destruction Mechanism of Floating-Roof Oiltank under Combustible Gaseous Explosion in a Small Scale Experiment
Authors: Lu Sheng Zhuo , Wang Wei
Published: October 2011

The number of accidental explosions has recently increased, and more researchers focus attention on damage mechanism and safety strategy of structures. The aim of this paper is to assess the mechanical effects of an accidental explosion of a gaseous mixture and the floating-roof oiltank dynamic response subjected to external blast wave loading. For this purpose, the research is based upon an experimental study at laboratory scale. It shows that the pressure induced by blast wave on the structures rose immediately and altered dynamically. The top of the oiltank surface towards blast loading is in a tensile state with the maximum strain. It is the vulnerable place to resist the gaseous blast loading. Meanwhile, the inner liquid could induce the compression wave, and collided with the structures of the oiltank intensively. Compared with the blast wave pressure on the front, the back wall pressure transmitted by liquid collision had the same order of magnitude and longer actuation duration than the former.
Global Stability Analysis of the Wake behind a Circular Cylinder Based on the POD-Chiba Method
Authors: Zhang Wei , Wen Xian , Jiang Yan Qun
Published: October 2011

A proper orthogonal decomposition (POD) method is applied to study the global stability analysis for flow past a stationary circular cylinder. The flow database at Re=100 is obtained by CFD software, i.e. FLUENT, with which POD bases are constructed by a snapshot method. Based on the POD bases, a low-dimensional model is established for solving the two-dimensional incompressible NS equations. The stability of the flow solution is evaluated by a POD-Chiba method in the way of the eigensystem analysis for the velocity disturbance. The linear stability analysis shows that the first Hopf bifurcation takes place at Re=46.9, which is in good agreement with available results by other high-order accurate stability analysis methods. However, the calculated amount of POD is little, which shows the availability and advantage of the POD method.
Stress Intensity Factor of Peripheral Edge Crack around a Spherical Cavity under Internal Pressure Corrected
Authors: Shi Shaofang , Wang Qi Zhi , Li Ping Jun
Published: October 2011

The singular stress problem of a flat annular crack around a spherical cavity subjected to internal pressure is investigated. By application of an integral transforms and the theory of triple integral equations, the problem is reduced to the solution of a singular integral equation of the first kind. The equations gotten for the case of peripheral edge crack around a spherical cavity is solved numerically, and the stress intensity factors are shown graphically. The results in this paper are basically consistent with the existing literature in special cases.
Wind Energy Utilization of High-Rise Buildings Roof Numerical Analysis
Authors: Chen Yan Hong , Peng Xing Qian , Yang Rong
Published: October 2011

In order to improve the utilization of wind energy, set the tower on the roof, the roof tower on the use of CFD technology in different dimensions and different wind direction of the wind environment under the numerical analysis, simulation the velocity field around tower building, and comparative analysis, find out the reasonable fan placed to achieve the purpose of full use of wind energy.
Research and Development of Continuous Quantitative Dispensing System
Authors: Yan Liang Wen , Li Teng Fei , Zhao Li Na , Li Wen , Du Wei , Guo Jie
Published: October 2011

The continuous quantitative dispensing system gets the trajectory coordinates by CCD image recognition, then the dispensing head is automatically positioned by motion control platform. Pressure controller is selected to automatically control the pressure of compressed air in order to ensure gas pressure is steady. Peristaltic pump is used to guarantee the precision of the automatic program-controlled colloid transmitting. Colloid volume, dispensing head position and dispensing accuracy can be effectively guaranteed. The experimental results show that the whole system fully meets the double fluid dispensing design requirements, and program interface is friendly and easy to operate. It can apply for product promotion and widely application.
Synthesis and Purification of L-Phenylalanine Oligo-Peptides Assisted by Phosphorus Oxychloride
Authors: Lv Ming Xiu , Qiang Li Ming , Lu Kui , Yao Ying Yan
Published: October 2011

Oligo-peptides have been focused on by chemists recently because of the strong bioactivity an activity as drug or precursor of drug. α-Amino acid could self-assemble into oligo-peptides with the assistance of inorganic phosphorus reagents, so it could provide a new method to synthesize peptides. In this paper, the self-assembly reaction of L-Phenylalanine mediated by phosphorus oxychloride were studied by using ESI-MS. The proper condition of self-assembly reaction of L-Phe was reported. The reaction products were purified by RP-HPLC and Phe-Phe dipeptide was characterized by the means of IR, 1H-NMR, 13C-NMR and ESI-MS/MS.
Lipid Peroxidation and Gene Expression of Antioxidant Enzymes in Response to Polycyclic Musks in Earthworm Eisenia fetida
Authors: Chen Chun , Zhou Qi Xing
Published: October 2011

Polycyclic musks (PCMs) released into the environment have potential impacts on soil organisms such as earthworms. To better understand the toxicity of PCMs, earthworms were exposed to tonalide (AHTN) and galaxolide (HHCB) – spiked filter paper for 48 h and impacts on oxidative stress and gene expression were investigated. Levels of lipid peroxidation significantly (P<0.05) increased in time-dependent manner, suggesting that the reactive oxygen species induced cellular oxidative injury of Eisenia fetida might be one of the main toxic effects of PCMs. Gene expressions of superoxide dismutase (SOD) and catalase (CAT) significantly (P<0.05) up-regulated at low doses of AHTN (0.6 μg/cm-2) and HHCB (0.3 μg/cm-2) throughout the 48 h exposure period, while down-regulated at high doses (6.0 μg/cm-2 AHTN and 3.0 μg/cm-2 HHCB) after 48 h. These results indicate that excessive PCMs could result in oxidative damage in earthworms. To our knowledge, this study is the first description of PCMs causes toxicity in earthworm using a transcript level approach, which can provide new insights into the toxicological mechanism of AHTN and HHCB.
Self-Assembly Synthesis of L-Isoleucine Assisted by POCl3
Authors: Zhao Dong Xin , Ma Li , Lu Kui
Published: October 2011

The self-assembly of L-Ile mediated by POCl3 were investigated by using ESI-MS. And the self-assembly oligopeptides of L-Ile could be effectively separated by RPLC. The results indicated that L-Ile could be fast synthesized into oligopeptides mediated by POCl3, and the self-assembly of L-amico acids assisted by POCl3 would be an effetive methods for oligoepetides synthesis..
Radical Scavenging and Hypolipidemic Activity of Aqueous Extracts from Labadou (A Traditional Fermented Soybean Food of Southern China)
Authors: Yu Bo , Lu Yu , Ma Chun Yan , Tang Chu Ying
Published: October 2011

Labadou was prepared according to the traditional technology of Southern China and its aqueous extract (AEL) was obtained. The oxygen radical scavenging capacity of AEL was assessed. The hypolipidemic effects in hyperlipidemic rats of AEL were investigated through designed sequential trials and by measuring serum lipid parameters. Results showed that AELexhibited significant ( p < 0.01) scavenging potencies on superoxide and hydroxyl at a concentration of 10 mg/ml. It was also found that AEL could significantly reduce serum total cholesterol (TC) and triglyceride (TG) concentrations and at same time markedly increased the high density lipoprotein cholesterol (HDL-C) levels after 3 weeks treatment in tested rats. These results showed that Labadou had an excellent hypolipidemic activity and the peptides of low molecular mass from Labadou were one of the possible principles of bioactivity.
Mechanism Analysis of Indigenous Microbial Enhancement for Residue Oil Recovery
Authors: Shu Fu Chang , She Yue Hui , Wang Zheng Liang , Kong Shu Qiong
Published: October 2011

Biotechnological nutrient flooding was applied to the North block of the Kongdian Oilfield during 2001-2005. The biotechnology involved the injection of a water-air mixture made up of mineral nitrogen and phosphorous salts with the intent of stimulating the growth of indigenous microorganisms. During monitoring of the physico-chemical, microbiological and production characteristics of the North block of the Kongdian bed, it was revealed significant changes took place in the ecosystem as a result of the technological treatment. The microbial oil transformation was accompanied by an accumulation of carbonates, lower fatty acids and biosurfactants in water formations, which is of value to enhanced oil recovery. The microbial metabolites changed the composition of the water formation, favored the diversion of the injected fluid from closed, high permeability zones to upswept zones and improved the sweep efficiency. The results of the studies demonstrated strong hydrodynamic links between the injection wells and production wells. Microbiological monitoring of the deep subsurface ecosystems and the filtration properties of the fluids are well modified, producing 40000 additional tons of oil in the test areas.
Effect of Municipal Wastewater Treatment by Biological - Ecological Filter (BEF)
Authors: Xing Mei Yan , Lin Ya Nan , Wang Hao , Yang Jian , Huang Zhi Dong
Published: October 2011

A Pilot-scale study was conducted to treat municipal wastewater by Biological-Ecological filter (BEF), which is composed by anaerobic hydrolysis pool (AHP), high load biological filter (BF) and vermifilter (VF). The results demonstrated that when the influent concentrations of COD and NH3-N were in the range of 190~300 mg/L and 25~35 mg/L, respectively, the effluent concentration of them ranged from 45 to 65 mg/L and 8 to 20 mg/L with the average removal efficiency of 73.6% and 50%, respectively. Meanwhile, the effluent average SS concentration was less than 15 mg/L. The effluent quality could steadily meet the second level criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002) in China. The removal performance of fine zeolite was significantly better than the coarse one and heightening packing layer had little effect on the removal of COD and NH3-N. This study verified that BEF system for municipal wastewater treatment was feasible.
Rapid Gene Cloning, Overexpression and Characterization of a Thermophilic Catalase in E. coli
Authors: Luo Hui , Zhou Yao , Chang Yan Hong , Xiong Lian , Liu Lin Zhi
Published: October 2011

A thermophilic catalase-encoding gene was rapidly obtained by means a PCR-based protocol with the genomic DNA mixture from compost culture as the template. The open reading frame of this gene is composed of 2208 base pairs, sharing 92.5% homology with the reported Bacillus stearothermophilus gene (NCBI genbank accession No. AB020234. 1). A prokaryotic expression plasmid pET-CATHis was constructed for the gene expression, and two recombinant E. coli, BL21(DE3)/pET-CATHis and BL21(DE3)pLysS/pET-CATHis were finally obtained. After culture optimization, the highest activities for these two strains in shaking flask culture were 74.3 U/ml and 1055.3 U/ml, respectively. The 6 His-tagged recombinant catalase was then purified by using immobilized metal affinity chromatography, and the properties of the purified protein were finally characterized.
Targeting Human Telomeric G-Quadruplex with Perfluoroalkyl Metal Phthalocyanine Derivatives
Authors: Liu Li Nan , Wu Yan Ling , Jiang Shi Kun , Qiu Tao , Zhang Hong Fei , Zhang Wen
Published: October 2011

The ability of G-quadruplex ligands to induce formation of four-stranded DNA and stabilize four-stranded DNA make them able to inhibit telomerase. This paper investigated the interaction of four perfluoroalkyl phthalocyanine metal derivatives with telomeric DNA sequence 5’-d [TTAGGG)4TT-3’ by using circular dichrosim (CD), ultraviolet-visible and fluorescence spectroscopy, and molecular simulation method. Results show that perfluoroalkyl Zinic phthalocyanine can strongly induce the G-DNA in the buffer without extra K+/Na+ added with a molar ratio of 1:1 interaction possibly by intercalation into G-quartets, and only increases the amount of G-DNA in the presence of K+/Na+, with a compound/DNA 2:1 interaction possibly by external stacking model.
Design of Surface Plates Flatness Detection System Based on Modbus Protocol
Authors: Liu Xi Jun , Hu Bing , An Jin Xin , Xing Lei
Published: October 2011

The method which is based on industrial fieldbus of Modbus protocol for the surface plates flatness measurement and control system is presented in this paper. The systerm is according to the evaluation rule of diagonal stationing, and uses the evaluation method of minimal conditions principle. The systerm uses SOC system level MCU as the core, and through multi-channel eddy current displacement sensor to collect the data of the flat. PC uses LabVIEW design man-machine interface, and uses the access database technology to realize the collection of the flat data and the management of the history gathering information.The whole system design is simple, function strong stability and high ratio, and has been used on one production line already.
Factors Affecting the Performance of Molten Salt Heat Receiver
Authors: Li Pei Juan , Cheng Yu Ting , Liu Shi
Published: October 2011

The molten salt heat receiver performance of a solar power tower plant is analyzed in this paper. The numerical model of the heterogeneous heat flux boundary of which a half of the single heat receiver is heating and the other half of that is adiabatic heating, and of the heat convection and heat transfer in the molten salt heat receiver on condition of the convective heat loss and the radiation loss boundary conditions is established. In the numerical model, the wall heat conduction and variable property of the molten salt are considered as well as the roughness of the wall. The flow velocity, the temperature distribution and the heat transfer characteristics of the molten salt heat receiver under the conditions of high temperature and high heat flux are presented as important basis for the design and the operation control of the molten salt heat receiver.
Synthesis and Luminescent Characterization of Highlight Blue Mg (II) Materials
Authors: Tai Xi Shi
Published: October 2011

A new highlight blue luminescent material has been prepared by the reaction of Mg (II) ion with 1-acetyl-2-naphthol-4, 4’-diaminodiphenylsulfone. The material was analyzed by infrared spectrum and elemental analysis. The luminescent properties of Mg (II) material were studied in solid in CH3OH, in CH3CH2OH and in DMSO solution, respectively. The results show that the Mg (II) material exhibits highlight blue luminescence emission, and exhibits the strongest fluorescence in CH3CH2OH solution than in solid and in CH3OH and in DMSO solution.
Synthesis and Spectral Characterization of a New Mg (II)-Schiff Base Luminescent Materials
Authors: Tai Xi Shi
Published: October 2011

A new Schiff base ligand, salicylaldehyde-4, 4'-diaminodiphenyl ether (L), and its complexes with Mg (II) have been synthesized. The Mg (II) complex was characterized by elemental analysis and infrared spectrum. The results indicate that the Mg (II) ion coordinates to the nitrogen atoms and oxygen atoms of the ligand. The fluorescence properties of Mg (II) complex material in solid and in organic solvents were studied. The solvent factors influencing the fluorescent intensity are discussed.
Research on the IR Spectrum and Fluorescence Properties of Cd (II) Complex with 1-Acetyl-2-naphthol-4, 4'-diaminodiphenyl Ether
Authors: Wang Li Hua
Published: October 2011

In order to synthesize the high efficiency luminescent material, A novel Cd (II) complex with 1-acetyl-2-naphthol-4, 4'-diaminodiphenyl ether was synthesized. The infrared spectrum and luminescent properties of Cd (II) complex material have also been studied. The infrared spectrum shows that the Cd (II) ion forms stable complex with 1-acetyl-2-naphthol-4, 4'-diaminodiphenyl ether. The results of fluorescence analysis indicate that the Cd (II) complex emit blue-green fluorescence in solid, however, the fluorescence is very weak in organic solvents. The results can guide the design and synthesis of new luminescent complex materials in the future.
Judgement on Rough Set Theory for Disease Formation of Cement Concrete Pavement
Authors: Liu Shi Ming , Tang Jing , Zhao Shun Bo
Published: October 2011

An analytical method based on rough set theory is put forward to judge disease genesis of cement concrete pavement, in which a decision table of disease genesis based on rough set theory is built according to statistical data of pavement disease in special segment. The support degree of each factor is computed by the attribute reduction algorithm of rough set theory to estimate its influence on pavement disease. The feasibility of the method is illustrated by an example, which makes up the shortages of present practical methods of the pavement disease genetic analysis and provides scientific judgment for maintenance decision of pavement.
Synthesis, Spectral Properties of Tb (III) Complexes with 2，2'-Dithiosalicylic Acid
Authors: Wang Li Hua
Published: October 2011

A new terbium complex with aromatic multicarboxylate ligand, 2, 2'-dithiosalicylic acid (L), has been synthesized. The terbium complex was characterized by elemental analysis, infrared spectrum and luminescent spectra, and the complex conforms to 1:1 metal-to-ligand stoichiometry. The complex is stable in air. The results show that the Tb (III) ion in the complex is coordinated by oxygen atoms of the ligand and the oxygen atoms of the nitrate and coordinated water molecules. The luminescent properties of terbium complex have also been investigated in solid state and in organic solvents.
An Artificial Immune-Based Distributed Intrusion Detection Model for the Internet of Things
Authors: Chen Run , Liu Cai Ming , Chen Chao
Published: October 2011

Traditional detection technology for network attacks is difficult to adapt the complicated and changeful environment of the Internet of Things (IoT). In the interest of resolving the distributed intrusion detection problem of IoT, this paper proposes an artificial immune-based theory model for distributed intrusion detection in IoT. Artificial immune principles are used to solve the problem of IoT intrusion detection. Antigen, self, non-self and detector in the IoT environment are defined. Good immune mechanisms are simulated. Detector is evolved dynamically to make the proposed model have self-learning and self-adaptation. The outstanding detectors which have accepted training are shared in the whole IoT to adapt the local IoT environment and improve the ability of global intrusion detection in IoT. The proposed model is expected to realize detecting intrusion of IoT in distribution and parallelity.
Experimental Research on Ultrasound Cast-Rolling Lead Alloy Strip
Authors: Li Jian Ping , Zeng Li Bang , Mao Da Heng , Jiang Hong Feng
Published: October 2011

With the ultrasound was put into the experiment of cast-rolling lead alloy strip, it broke the dendrite structures and enhanced the under-cooling by the effect of cavity and acoustic streaming. The microstructure comparison of ultrasound and general cast-rolling shows that: The grain size of general cast-rolled lead strip is big; the grain boundary is coarse and the organization structure is uneven. However, the grain structure is refined, smaller grains and uniform organization structure is acquired with ultrasound treatment. Besides, the mechanical properties test results of the two kinds lead alloys shows that the ultrasound cast-rolling lead alloys are better than general cast-rolling. The tensile strength, yield strength and elongation of ultrasound cast-rolling lead strip are increased by 11.30%, 22.15% and 21.74% than that of general cast-rolling lead strip.
The Analytical Model and Flow Parameter Influencing the Internal Pressure Distribution of Elbow Pipe
Authors: Lu Xiao Yang , Lu Xiao Li , Huang Li Li , Xu Yi Min , Liu Ying Yue
Published: October 2011

The internal pressure analytical model of elbow pipe and the research conclusions, which were established after the study of the influence which was made by different outlet pressure P0, inlet velocity v and fluid density ρ on the regularity of the distribution of the fluid pressure in elbow pipe with the method of numerical simulation, bear important engineering significance to the strength analysis, safety inspection and structural design of the elbow pipe.
Optimization Design of Cross-Section of Prestressed Steel-Concrete Composite Box Girder
Authors: Wang Jun , Li Zi Qing , Hao Xian Wu
Published: October 2011

According to the design specifications and structure theories of prestressed steel-concrete composite box girder, a mathematical model of optimization of cross-section of prestressed steel-concrete composite box girder was established. The nonlinear constrained optimization was adopted and the computer program was compiled with Matlab language. The efficiency optimization was achieved in the optimization design of the two different span bridge cross-section of a simply supported steel-concrete composite box girder. Numerical result illustrated that the optimization mathematical model of optimization was exact and the algorithm effective.
Synthesis and Electrochemical Performances of Li4Ti5O12/C as Anode Material for Lithium-Ion Batteries
Authors: Gu Fang , Chen Gang
Published: October 2011

Spinel Li4Ti5O12 exhibits inadequate electronic conductivities that negatively impact its electrochemical performance, this disadvantage limits its commerical use in high current applications for future hybrid electric vehicles. Li4Ti5O12/C has been examined in order to improved the electronic conductivities. Different sucrose additions at m(sucrose)/m(Li4Ti5O12) = 5%, 10%, 15% are investigated along with the structure and electrochemical performances. The results show that the best sucrose addtion is 10%, when sintered at this condition, the distribution of particles size and electrochemical performance of the compound are the most satisfying. When charged at 0.5 C, the initial discharge capacity is 167.72 mAh•g-1, and the initial charge capacity is 162.28 mAh•g-1, and it shows the longest and flattest discharge performance among the three synthesized samples.
Experimental Research on Short Compression Column of the Shale Ceramisite Concrete
Authors: Yang Wei Jun , Zhou Ying Jie , Meng Cong Cong
Published: October 2011

In order to study the force performance of the short compression column of the Shale ceramisite concrete, the article have research the axis and eccentric of the eight Shale concrete rectangular short columns((l0/b≤4). As the article reach the component is divided into damage caused by pressure and destruction of tension, while it’s contingency rather than the ordinary concrete and plasticity development are shorter ; the bearing capacity of normal section by shale ceramisite Concrete is greater than specification value, it satisified with the requirement of structural load-bearing; Shale concrete short column under pressure and the strain meet a certain section of the plane-section assumption in the process of loading.
Crystal Morphology and Thermal Properties of PA6/PP-g-MAH/POE Blends
Authors: Run Ming Tao , Zhou Wen , Xing Bing Tao , Yao Meng
Published: October 2011

The crystal morphology and thermal properties of the PA6/PP-g-MAH/POE blends prepared by twin-screw extruder were studied by polarized optical microscopy (POM) and differential scanning calorimetry (DSC) respectively. The results suggest that the crystal morphology of PA6 is acicular crystal while PP-g-MAH is micro-spherulites; The acicular crystals form across POE phase to PA6 phase, and the acicular crystals of PA6 in the POE phase have better regularity in dimension than those in amorphous PA6 phase. Acting as a compatibilizer, PP-g-MAH improves the miscibility of PA6 and POE, leading to the glass transition temperature of the blends decreases gradually with increasing POE contents. PA6 and PP-g-MAH can crystallize individually, and the formed PA6 crystals induced the crystallization of PP-g-MAH at higher temperature; furthermore, PP-g-MAH and POE components can increase the crystallization rate of PA6.
Optimization of Conditions for Extraction of Acid-Soluble Al2O3 from Pyrophyllite
Authors: Wu Jun Jun , Chen Hai Feng , Zhao Shi Jiang , Li Bin
Published: October 2011

Pyrophyllite was the cheap, environmentally friendly alumina silicate clay minerals. This paper studied optimization of conditions for extraction of acid-soluble Al2O3 from pyrophyllite. Qualitative tests had been performed in studying pyrophyllite crystal at different temperatures by using scanning electron microscopy. Dissolution experiments showed that after thermal activation the behavior of alumina in acid the dissolution was different, which was affected by hydrochloric acid concentration, heat activation temperature and acid leaching time. When the calcinations temperature was 700 °C and hydrochloric acid concentration was 25%, the dissolution amount of alumina largest. The fit results indicated that the research for the relationship between dissolution and time by Using Exponential function series Asymptotic1 model to fitting match was the best. So the above function could be used to estimate each time the dissolution of alumina from pyrophyllite in hydrochloric acid.
Optimization of Kaolin Wastewater Treatment Processes Research via Response Surface Methodology
Authors: Wu Li Ping , Zheng Dian Mo , Zhu Sheng Gan
Published: October 2011

The CCD mathematical model of response surface methodology (RSM) has been used to optimize the process parameters of treating kaolin wastewater, the interaction of the factors on removal rate of turbidity and average particle size of floc such as the flocculation temperature ,the pH value, the dosage of PAC, the dosage of St-PAM were studied. The optimum condition of the effluent disposal via the experiment was as follows: the flocculation temperature was 25°C,the pH value was 6.5, the dosage of PAC was 21.5/mg/L, the dosage of St-PAM was 5/mg/L.In these conditions,the turbidity removal rate of the kaolin wastewater was 97.56%,and the average particle size of flocculation body was 0.994mm. Under the optimum conditions, the removal rate of turbidity and the average particle size of flocculation body was respectively 98.05% and 1.09mm.The model had good prediction effect.
Optimization of Magnesium Separation and Extraction from Boron Slurry Using Response Surface Methodology
Authors: Gao Feng , Fu Rong , Qian Ming Yang , Wang Zhu Min , Zhang Xiang
Published: October 2011

Response surface methodology was used to optimize the soaking Mg leaching ratio from the boron slurry screened by 25 fractional factorial design. Five effective factors such as H2SO4 concentrations, reaction time, reaction temperature and stir velocity were tested by using 25 fractional factorial design criterion and three effective factors H2SO4 concentrations, reaction time and reaction temperature showed significant effect(P2SO4 concentrations of 0.29mol/l, reaction time of 90 min and reaction temperature of 50°C. Three runs of additional confirmation experiments were conducted. The mixture magnesium leaching value was 58.20%.
Prepared Activated Carbon from Rice Husk Cracking by Medium Optimization Using a Statistical Experimental Design
Authors: Gao Feng , Ji Shang Wei , Pan Sheng Wen , Liu Xue Gui , Zhang Xiang
Published: October 2011

Response surface methodology was used to optimize the activated carbon iodine absorption value screened by Placket-Burman design. Six effective factors such as NaOH concentrations, boiling time, liquid ratio, calcined ways, calcined time and calcined temperature were tested by using Placket-Burman design criterion and three effective factors NaOH concentrations, liquid ratio and calcined time showed significant effect(P<0.05) on iodine absorption value. By applying Box-Behnken design, the optimized condition obtained NaOH concentrations of 2.5mol/l, liquid ratio of 1/1.125 and calcined time of 37.5min. Three runs of additional confirmation experiments were conducted. The average relative error was 0.58%.
The Effect of Alkaline Earth Metal and Carboxylate Derivatives on the Luminescence of Quinaldine Acid Zn (II) Complex Material
Authors: Tai Xi Shi
Published: October 2011

Quinaldine acid Zn (II) complex material has been prepared in ethanol. The luminescent properties have been investigated in solid state and in organic solvents. The results show that the Zn (II) complex emits green fluorescence at 521 nm both in solid state and in organic solvents. The effect of alkaline earth metal and carboxylate derivatives on the luminescence of quinaldine acid Zn (II) complex material has also been studied in DMSO, and the results show that alkaline earth metal ion and carboxylate derivatives have different effect on the luminescent intensity.
Treatment of Dyeing and Printing Wastewater by Copper Oxide Loaded on Coconut Shell Activated Carbon
Authors: Liu Yu De , Jiang Bo Quan , Xiao Zheng Qiang
Published: October 2011

The activated carbon loaded copper oxide catalyst was prepared from Hainan abandoned coconut shells using chemical activation method and applied in treatment of acid bright red GR simulation dyeing wastewater. The effects of phosphoric acid concentration, ratio of liquid to solid, activation time and activation temperature on the COD and color removal rates were investigated by orthogonal experiment. The results showed that the optimal values of the parameters above were 65% (in mass), 3:1, 2.5h and 500°C under the designed copper oxide loading conditions of calcining temperature 300°C,calcining time 3.0 h and use level of copper nitrate 15 mL. Using the prepared sample for the treatment of the wastewater, the COD and color removal rates reached 94.384% and 99.840%, respectively.
A Mechanical Investigation on Altered Rocks in Tunnel Construction
Authors: Cui Kai , Ling Zhong Cheng
Published: October 2011

Phenomenon of surrounding rock deformation and collapse, groundwater lowering, ground collapse and cracking appeared in a tunnel project. It is necessary to study mechanical properties of alteration zone for guarantying construction safety and ensuring the reliability of supporting structures. This paper, using geological survey and microanalysis methods, determines the mineral composition of all typical altered rocks in the alteration zone. Furthermore, an overall understanding of their physical and mechanical characteristics will be presented based on the results of physical and mechanical (triaxial and direct shear tests) tests.
Effect of Cooling Rate on the Solidification of Zn-5wt%Al Alloy
Authors: Yang Fu Shuang , Ni Feng
Published: October 2011

Solidification of Zn-5wt%Al alloy was investigated by DTA and quantitative metallography analysis. The effect of cooling rate on eutectic lamellar spacing was studied. Based on analysis of heat transfer during solidification, relation between cooling rate and eutectic lamellar was derived. Curve fitting was carried out according to the data of experiment. The results indicate that eutectic lamellar spacing is approximately inverse ratio with the one fourth power of cooling rate.
Simulation Study of the Oil Tank under Seismic Loads
Authors: Wang Jin Long
Published: October 2011

The finite model of the oil tank was built,and model analysis and seismic response analysis were studied,Vertical and horizontal dynamic response and the structural integral displacement ratio and X/Y directional stress and Y directional bending moment and were gained under Seismic Loads. The analysis can supply the more scientific basis for aseismatic design of the oil tank.
Finite Element Analysis of the Greenhouse Canopy Effect with Seismic Load
Authors: Liu Chang Jiang , Wang Jin Long
Published: October 2011

The finite element model about greenhouse canopy of seismic analysis was setted up, The finite element analysis software ANSYS was used to study structure displacement, stress analysis on greenhouse shed. The results showed that the dangerous part of the canopy were located on upper chord members,lower chord members, web members of the framework and the lower and upper, the inside of both sides of the wall with seismic load.Corresponding to this results ,the main destroied form were the framework damage caused by the bending deformation of upper chord members, lower chord members and the upper web members and the unstability caused by the distortion of both sides of the wall.
Finite Element Analysis of a Sliding Isolation Steel Structure
Authors: Zhang Xin Zhong , Miao Lian Juan
Published: October 2011

Using general analysis software ANSYS establish non-isolated and isolation steel villa structure model, selecting a reasonable seismic wave and obtaining this via seismic excitation time-history analysis: sliding isolated structures can reduce seismic upload, slip shift seismic isolation layer absorbs most of the energy, can reduce seismic response of 23.1%~78.8% compared with ordinary anti-seismic structure. the level of isolation effect is remarkable.
Numerical Investigation into Rockburst Prevention Technology in Deep-Buried Tunnels with Circular Cross-Section
Authors: Wang Xin Yu , Shao Zhu Shan , Cui Yu Ming
Published: October 2011

Rockburst is a common dynamic failure phenomenon in deep-buried underground construction process, which greatly threatened the safety of equipment and person. In the paper, combined with the engineering of Xinjiang Xiabandi hydraulic and the Russense’s rockburst criteria, the finite element analysis are employed to study the effect of advance dig-hole and softening of surrounding rock. The results of the study indicate that the two measures can effectively reduce the intensity of rockburst level in the construction of deep-buried tunnel.
Research on Decreasing Temperature Technology of Emergency Rescue in Metro Fire
Authors: Li Yu , Dong Le Xia
Published: October 2011

Decreasing the temperature of fire field is one of the most important technologies of metro fire emergency rescue. It is calculated that the total heat is released in metro fire and the mass of ice, liquid nitrogen and dry ice are needed when the temperature is decreased to 60°C. Ice is the best option among the three through comprehensive analysis from mass, volume, transportation, storage and so on. Research on cooling technology of emergency rescue in metro fire can do contribution to reduce metro fire casualties.
Elastic Performances of Short Pier Shear Wall Subjected to Lateral Loading
Authors: Liu Shi Mei , Huang Dong Sheng
Published: October 2011

The formulas to define the minimum ratio of length-to-thickness of the pier cross section of short-pier shear wall is presented, by which the short pier shear wall is distinguished from the irregular cross-section column frame numerically. According to the results of finite element analysis of typical short-pier shear walls, the elastic mechanical performances of them were investigated. Conclusions were achieved that the flange width hardly influence on the moment of piers but significantly influence on the magnitude of stresses in the horizontal section and the top displacements of walls; the deflection curve of short-pier shear wall is flexural-shearing type, equations and diagrams to define the position of the contra-flexural point in the curve are provided.
A Spectral Representation Model for Simulation of Multivariate Random Processes
Authors: Luo Jun Jie , Su Cheng , Han Da Jian
Published: October 2011

A model is proposed to simulate multivariate weakly stationary Gaussian stochastic processes based on the spectral representation theorem. In this model, the amplitude, phase angle, and frequency involved in the harmonic function are random so that the generated samples are real stochastic processes. Three algorithms are then adopted to improve the simulation efficiency. A uniform cubic B-spline interpolation method is employed to fit the target factorized power spectral density function curves. A recursive algorithm for the Cholesky factorization is utilized to decompose the cross-power spectral density matrices. Some redundant cosine terms are cut off to decrease the computation quantity of superposition. Finally, an example involving simulation of turbulent wind velocity fluctuations is given to validate the capability and accuracy of the proposed model as well as the efficiency of the optimal algorithms.
Experimental Method of Axial Compressive Existing Concrete Columns Strengthened with Externally Bonded FRP
Authors: Kang Hong Zhen , Ma Wei Hua , Wang Xi Qiang , Ye Ying Hua
Published: October 2011

To study the experimental method of axial compressive test of concrete columns in service strengthened with bonding FRP(fiber reinforced plastic), the post-tensioned pre-stressing method was employed to exert initial stress to the specimens before bonding FRP, Then FRP was bonded. Axial loading method of the specimens was that one main jack exerted axial force and two jacks provided stiffness for the specimens. In this way the complete stress-strain curves of specimens was obtained. The results indicated the technical target of axial compressive test of in service concrete columns strengthened with FRP was greatly achieved by using this experimental method.