bluuebunny/crossref_metadata_2025 huggingface dataset:
Conceptual Design and Optimization of Submarine Escape Capsule
Authors: Huang Xiang Bing , Huang Xing Ling
Published: August 2013

Submarine escape capsule is an effective equipment to improve submariners viability when accident. In order to design a reasonable escape system, three alternatives, sphere chamber, ellipsoid chamber and combined chamber, were presented in the conceptual design process. The factors which influenced decision making were researched subsequently, such as general performance parameters, dependence on submarines position when releasing, safety of the product in hazardous conditions and the products influence on submarine. Then the influenced factors and their attributes were evaluated in three alternatives, and a multiple attribute decision making approach based on entropy weight was used to optimize the conceptual design. The results showed that combined chamber was the best choice for submarine escape capsule because its overall technology level was superior to others.
Numerical Extrapolate Analysis of Joint Wear in Plan Multibody Systems
Authors: Wu Li Juan , Li Ai Ping , Liu Xue Mei
Published: August 2013

In this paper, Least Square method is applied to model the clearance wear to achieve the accurate prediction with low cost. So, firstly, the characteristics of the clearance wear are analyzed, i.e. time-variant, asymmetric, and coupling. Secondly, the dynamic incremental model is deduced from Archards wear law to obtain the wear incremental at a time step. Based on the wear data of the experiment, Least Squares Method is adopted to model the extrapolation function for divided sectors of contact surface. Finally, both models are applied to predict the clearance joint wear in the crank slider mechanism, getting two wear trend curves with great similarity. However, the computing time is greatly reduced in the extrapolated model.
Updated Research Result on Transverse Corner Crack of Slab
Authors: Li Lin , Jiao Jin Sha , Fei Shu Mei , Lin Hai Tao , Cui Quan Fa
Published: August 2013

To introduce feature and microstructure of edge crack of rolled coil, character and distribution of transverse corner crack of continuous cast slab (hereafter referred to as transverse corner crack), trace out rolling process of defective continuous cast slab, transverse corner crack of slab causes edge crack of rolled coil, the corner inclusions of slab and rolling process are also significant factors. To give some suggestions to resolve two dimensional heat transfer and high cooling intensity about control of transverse corner cracks. Inclusions cause stress concentration to lead to edge cracks of coils. Edge cracks of coils are related to transverse corner cracks of slabs, but not an exact one-for-one relation. Tiny transverse corner cracks may be removed by scarfing or furnace. Uneven or low temperature of the edge of rolled piece cause uneven extension of edge metal to form “fold”, namely “edge filament”. By research and practice, the quality of slab has been substantially improved in Shougang Qiangang.
Process Design on Baogang 2250mm Hot Rolling Project
Authors: Li Lin , Zhang Fu Ming , Liu Hong Wen , Zang Ruo Yu , Wang Fan
Published: August 2013

Based on scale and output, process design assures high-end products for Baogang, ensures advancement and reliability of devices, enhances Chinese split supply ratio; ability to decrease investment and implement sustainable scientific outlook on development. To introduce production scale and product scheme in Baogang 2250mm hot rolling project, and illustrate design flow, process arrangement and equipment level. Ability to insist on a high starting point, reference to international standards, use advanced devices in order to meet high-quality needs and achieve strong competitiveness, adhere to strategy of sustainable development, improve on utilization efficiency of raw materials, energy and water, accomplish cyclic utilization. Leading products are high-quality rare-earth auto plates, steel sheets for home electrical appliances. The layout of plant is tightly linked with process design and whole plan, short process, smooth logistics, less middle stages and advanced automatic control system create international level in 21st century.
Design of Hall Vehicle Speed Sensor Comprehensive System
Authors: Qin Zheng Kun , Li Shu Yuan , Wang Chun Wu , Wang Guo Feng
Published: August 2013

A hall speed sensor detection system is designed in this paper. The system consists of the controlling circuit part, the detecting circuit part and the microcomputer part. The system’s structure is simple. It has the advantages such as lower cost, intuitive display and user-friendly. The detecting accuracy can meet the requirements of industrial production, and be suitable for mass production.
Optimization Design Research on Descaling Bit of Water Pipeline Wall
Authors: Ren Hong Wei
Published: August 2013

Water pipeline scaling serious by prolonged use, result in a substantial diameter narrowed, reduced water efficiency. Mechanical cleaning is a kind of economic and security cleaning method, current drilling scaling equipment cannot clean effectively. In order to solve this problem, analyzes the dill descaling method. Choose multi-tooth bit as a foundation. Established finite element model for static analysis, gets three direction force diagram. Optimal design drill structure, created a new type of scaling drill. Compared two kinds force analysis results, by improving the structure, distributed stress on multiple cutting tooth, improved cutting conditions, enhanced the drill descale and feed ability, and improved the working life of the unit. Carried out static and dynamic finite element analysis, provide a theoretical basis for follow-up design.
Analysis of the Sensory Perception Factor in Product Design of Infant
Authors: Sun Xiu Li , Ma Chun Dong
Published: August 2013

In this work, the sensory perception factor was firstly analyzed in infant product based on the great significance of infants cognitive development from the perspective of cognitive psychology. Basically, the corresponding relationship between the development of infant sensory perception and product design elements was researched, aiming at giving a basis for designers to determine the standards for product design and find more potential needs of infants. Then, incorporating a new product of automatic infant soap dispenser, the application of above design method has been further validated of and exploration.
Development of Premium Threaded Connections for Casing and Tubing
Authors: Gao Lian Xin , Sun Kun Zhong , Zhang Yi
Published: August 2013

The application of API threaded connections for casing and tubing is limited due to their imperfect sealing ability and weak connecting strength. To overcome these prominent drawbacks of API threaded connections, new WSP series of premium threaded connections are developed by Wuxi Seamless Oil Pipe Corporation for HTHP(High temperature, High pressure) wells, deep wells, steam injection wells, highly deviated and long horizontal wells, etc. Characteristics and application ranges of eight kinds of these high performance premium threaded connections are compared and analyzed thoroughly in this paper. The comparison results are not only a good reference for technicians to design new connections, but a technical proof for users to choose the proper connections in different applications.
Effect of Biopolymer on the Dissolution and Stability of Itraconazole
Authors: Chamsai Benchawan , Sriamornsak Pornsak
Published: August 2013

traconazole (ITZ) polyethylene glycol 4000 (PEG) solid dispersions (SDs) containing hydroxypropyl methylcellulose (HPMC) and/or low methoxy pectin (LMP) were prepared by melting method at a ratio of drug to carrier of 1:9. ITZPEG formulations showed the highest drug release (83.51%) when compared to the formulations containing HPMC and/or pectin (i.e., 43.02%, 40.64% and 59.94% for those containing HPMC, LMP and HPMC+LMP, respectively). Powder X-ray diffractograms of all formulations revealed that the drug was present in an amorphous form while a crystalline form was observed only in ITZ or its physical mixture. After storage at accelerated condition (40°C, 75%RH) for 2 and 12 months, the crystalline of ITZ was clearly not observed in all SDs. All formulations showed an increase in mean dissolution time (MDT) but the formulations containing biopolymer showed the lower MDT than that containing no biopolymer. The results suggested that either HPMC or LMP in SDs can help to inhibit the recrystallization of amorphous ITZ in SD, probably by a polymer anti-plasticizing effect.
Preparation of Porous Hydroxyapatite as Synthetic Scaffold Using Powder Deposition and Sintering and Cytotoxicity Evaluation
Authors: Pujiyanto Eko , Tontowi Alva Edy , Wildan Muhammad Waziz , Siswomihardjo Widowati
Published: August 2013

This study prepared porous hydroxyapatite (porous HA) as synthetic scaffold and find out chemical properties, porosity, compressive strength and cytotoxicity properties. Porous HA was prepared by powder deposition and sintering from HA-PMMA mixed powder. Porous HA characterizations were conducted by XRD, XRF, SEM-EDX and mercury porosimetry analysis. In vitro cytotoxicity testing of porous HA was conducted by MTT method using vero cells. Porous HA has porosity on the interval 62.79 to 69.67% and compressive strength on the interval 1.53 to 3.71 MPa. Optimal porous HA has porosity is 62.79% with compressive strength is 3.71 MPa. Mercury porosimetry analysis showed that optimal porous HA has interconnective porosity up to 88.25% with pore size on the interval 0.05-355 μm and median pore is 52.64 μm. There was no significantly difference in the death percentage of vero cells caused HA powder and optimal porous HA (p= 0.158) but concentration of optimal porous HA were significantly effect on the percentage of vero cells death (p=0.003).
Effect of Organoclay Dispersion on the Barrier Performance and Mechanical Strength of EVA Clay Nanocomposites
Authors: Runcy Wilson , Anil Kumar S. , Sabu Thomas
Published: August 2013

Poly (ethylene-co-vinyl acetate) (EVA)/clay nanocomposites with different clay loadings were prepared. The transport of gases (oxygen and nitrogen) through the composite membranes was investigated. These studies revealed that the incorporation of nanoclays in the polymer increased the efficiency of the membranes toward barrier properties. It was also found that the barrier properties of the membranes decreased with clay loadings. This is mainly due to the aggregation of clay at higher loadings. The mechanical properties of the nanocomposites were analysed. Samples with 5 wt % Cloisite 15A clay showed superior performance in tensile strength and elongation at break.
Influence of Clay Tile Brick Infill Walls on Seismic Response of Buildings
Authors: Yakut Ahmet , Demirel Ismail Ozan
Published: August 2013

Majority of buildings in Turkey and in most developing countries are made with reinforced concrete frames infilled with clay tile brick walls. Despite this, influence of these walls is not accounted for in design. Past earthquake observations have shown that the infill walls have great influence on performance of buildings. In this paper, influence of the brick infill walls on strength and stiffness of RC buildings are presented through analytical results obtained for some typical buildings. Comparison of results showed that stiffness of the walls and their capacity is greatly influenced by the infill walls. The change in the strength and stiffness has been based on ratio of the wall area to the total floor area with providing expressions to determine these.
Mechanical and Wear Properties of Acrylonitrile Butadiene Styrene Polymer Composites
Authors: Babat Volkan , Taşdemir Münir
Published: August 2013

In the present work, acrylonitrile butadiene styrene based composites filled with aluminum, boron carbide and glass spheres particles were prepared. Fillers contents in the ABS were 5, 10, 15, and 20 wt%. The mechanical and wear properties of the polymer composites were investigated. The structural properties of the composites are characterized using a scanning electron microscopy. Keyword: Acrylonitrile Butadiene Styrene, wear, friction, mechanical properties, talc.
Comparative Studies on Wear Behaviour of Sintered 316L Stainless Steels Loaded with h-BN and MoS2
Authors: Mahathanabodee S. , Palathai Tippaban , Raadnui S. , Tongsri Ruangdaj , Sombatsompop Narongrit
Published: August 2013

Mechanical properties and wear behavior of stainless steel embedded with different solid lubricants were investigated. Hexagonal boron nitride (h-BN) and molybdenum disulfide (MoS2)-embedded 316L stainless steels (SS316L/h-BN and SS316L/MoS2) were prepared by powder metallurgy method. Various h-BN and MoS2 contents (10, 15 and 20 vol%) were mixed with 316L stainless steel powders and then sintered at 1200°C in H2 atmosphere for 60 min. The experimental results showed that small boride phase and h-BN powder occupied the pores in the microstructure of SS316L/h-BN composite whereas the MoS2 second phase occupied the pores of the sintered 316L matrix in the microstructure of SS316L/MoS2 composite. The addition of h-BN decreased the sintered density and hardness whereas that of MoS2 gave the opposite effect. Dry sliding wear behavior of composites was investigated by using pin-on-disc test rig at the sliding speeds of 0.1 and 0.2 m/s and the applied load of 3 N. The results showed that the MoS2 composites had higher wear resistance than the h-BN composite but the h-BN composite yielded a better friction reduction.
Effect of Flame Retardants on Performance of PALF/ABS Composites
Authors: Threepopnatkul Poonsub , Krachang Thanaphat , Teerawattananon Wipawee , Suriyaphaparkor Katawut , Kulsetthanchalee Chanin
Published: August 2013

This research is to study the effect of two different flame retardants i.e., bisphenol-A bis (diphenyl phosphate) (BDP) and 9, 10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) on the flammability and mechanical properties of the composites of modified natural pineapple leaf fiber (PALF) reinforced acrylonitrile butadiene styrene (ABS). A 10% by weight of such PALF was compounded with ABS using diisononyl phthalate 1% w/w as plasticizer at the different flame retardant concentration (10 and 20 wt%) in a co-rotating twin screw extruder. An injection molding machine was used to prepare the specimens. The effects of flame-retardants showed that the PALF/ABS composite containg DOPO showed superior performance in terms of flammabitily. Higher content of flame retardants led to increase LOI value. Moreover, the composites added DOPO produce enhanced mechanical properties such as youngs modulus and tensile strength.
Physical and Mechanical Properties of Wood-Plastics Composites: Effect of Types and Contents of Wood Flour
Authors: Sae-Lim Philipda , Aht-Ong Duangdao
Published: August 2013

Wood flour/high density polyethylene (HDPE) composites were prepared by an internal mixer and a compression molding, respectively. The HDPE composites were mixed with four types of wood flour at various contents with and without coupling agent. Polyethylene grafted maleic anhydride (PE-g-MA) was used as a coupling agent. The effects of type (hardwood and softwood), content (0, 30, 60, 80 wt%), and particle size (large and small) of wood flour on the mechanical properties, physical properties, and morphological properties of wood flour/HDPE composites were investigated. The results showed that the large particle size of wood flour provided better mechanical properties than the small particle size. The use of hardwood as a filler in HDPE resulted in the HDPE composites with higher flexural strength and lower water absorption than softwood. The flexural modulus of the wood flour composites was increased with filler loading when PE-g-MA was used as a coupling agent.
Superhydrophobic Silicon Surface with Micro/Nanocomposite Structure Formed by 2-Step Wet Etching
Authors: Nishioka Kensuke , Yasui Takatoshi
Published: August 2013

The micro/nanocomposite structure on silicon surface was formed by a simple 2-step chemical etching with a potassium hydroxide anisotropic etching and a stain etching in order to obtain a superhydrophobic silicon surface. Micro-sized pyramids structure was formed in a mixture of 3 wt.% potassium hydroxide with 8 vol.% isopropyl alcohol solution at 80C for 60 min. The formation of the nanosized structure was performed by stain etching at room temperature using nitric acid (HNO3) / hydrofluoric acid (HF) aqueous solutions. The silicon surface had the superhydrophobic surface. The contact angle was measured and the maximum value was 167o for the condition of second etching with HF : HNO3 : H2O = 11 : 1 : 3.
Effect of Heat Treatment on High Purity Nanoporous Silica Formed from Volcanic Ash Deposit Shirasu
Authors: Sato Kosei , Kokubu Toshinori , Nishioka Kensuke
Published: August 2013

High purity nanoporous silica was fabricated using Shirasu a volcanic ash as a starting material. The starting materials were melted at 1400°C. A mother glass was formed by quenching the melt in pure water. Leaching was performed by immersing the mother glass into an HCl solution. Nonsilica phases formed by phase separation in the mother glass were leached out with acid solution. The obtained porous silica was more than 99% pure and had pore size smaller than 2 nm. In order to control the pore size, post heat treatment was performed. The treatment temperature was varied from 540 to 600°C for 12 h. The treatment time was varied from 6 to 12 hours at 600°C. The pore size was controlled from 3.1 to 23.4 nm with changing temperature and time for the post heat treatment.
Stochastic Nonlinear Free Vibration Analysis of Functionally Graded Beam Subjected to Thermal Loading with Random Material Properties
Authors: Shegokar Niranjan L. , Lal Achchhe
Published: August 2013

This paper deals with the stochastic nonlinear free vibration response of functionally graded materials (FGMs) beam subjected to thermal loadings with uncertain material properties subjected to uniform and nonuniform temperature changes with temperature independent (TID) and dependent (TD) material properties. System properties such as material properties of each constituents material and volume fraction index are taken as independent random input variables. The basic formulation is based on higher order shear deformation theory (HSDT) with von-Karman nonlinear strains using modified C0 continuity. A direct iterative based nonlinear finite element method in conjunction with first order perturbation technique (FOPT) is used for FGMs beam to compute the second order statistics (mean and coefficient of variation) of the nonlinear fundamental frequency. The present outlined approach has been validated with the results available in literatures and independent Monte Carlo simulation (MCS).
Ba0.9 A0.1TiO3 (A = Al and Mg) Powders Synthesized by Solid State Reaction Technique and their Dielectric Properties
Authors: Khongnakhon Tunchanoke , Jongprateep Oratai
Published: August 2013

Barium titanate has been a common material for fabrication of capacitors. Synthesis of barium titanate can be achieved by various techniques. These techniques are believed to affect dielectric properties. This research was aimed at synthesizing BaTiO3 and Ba0.9 A0.1TiO3 (A = Al and Mg) powders by solid state reaction technique. Dielectric constant of barium titanate and the ones doped with 10 at% Al and Mg prepared by the solid state reaction technique had dielectric constant ranging from 109 to 280 at 1 MHz. Results from density examination revealed that barium titanate samples prepared by the solid state reaction had low density. This may leads to the decrease of dielectric constant. Results from this study suggested that the decline of the dielectric properties was attributed to chemical composition and density of samples.
Natural Rubber-Toughened Polystyrene: Effects of Mixing Procedure and Maleic Anhydride Content on Impact Property and Phase Morphology
Authors: Saengthaveep Saravalee , Jana Sadhan C. , Magaraphan Rathanawan
Published: August 2013

The toughening of polystyrene (PS) by melt blending with natural rubber (NR) was prepared in a brabender plasticorder. Two kinds of processing had been used: (a) one-step mixing in which the three components of PS (60 wt%), NR (40 wt%) and maleic anhydride (MA) were simultaneously introduced in the mixer; (b) two-step mixing in which NR and MA were separately premixed before the final mixing with PS. The effect of MA loading (3 and 5 phr) on gel content, impact energy and morphology of PS-NR-MA blend were further investigated. The results showed that the incorporation of NR into PS increased the impact energy of the blend. The results also showed a significant effect of the different mixing procedures on the properties of PS-NR-MA blend. High contents of unreacted MA and gel were found in the blend obtained by the one-step mixing, whereas the blend prepared by the two-step mixing showed lower values in both unreacted MA and gel content. On the other hand, the impact energy of the blend prepared by one-step mixing was slightly higher than that of the blend prepared by two-step mixing. This is due to the decreased molecular weight of NR in the formerly prepared MNR of the two-step mixing. For the effect of MA loading, the decrease of unreacted MA content, gel content and rubber particle size were found at low concentration of MA.
Theoretical Analysis and Verification of Plasticating Screw Characteristics for Injection Molding Machine
Authors: Yasue Akira , Nakagawa Kazuma , Araki Katsuyuki , Chiba Hideki
Published: August 2013

We have developed a plasticating simulation program for injection molding machines based on Chungs melting model. We compared the simulation results with the results of experiments which employed a visualization cylinder. The visualization cylinder has sight glass windows through which we can observe the melting phenomena in the cylinder. We established the temperature of resin in the cylinder by using infrared thermograph. The temperature of resin obtained by the simulation was close to experimental one. On the other hand, the solid-bed ratio deviated from the experiment results especially in the compression zone when the screw rotation speed was low. This suggests that the calculation of heat in the melting process should be improved.
Propranolol Hydrochloride Extended-Release Matrix Tablets Using Natural Rubber Latex as Binder
Authors: Panrat Kamon , Boonme Prapaporn , Taweepreda Wirach , Pichayakorn Wiwat
Published: August 2013

Matrix is one of the most interesting drug delivery systems to control drug release in pharmaceutical dosage forms. Natural rubber latex (NRL) from Hevea brasiliensis consists of cis-1,4-polyisoprene as the major polymer. It presents interesting physical properties such as easy to manipulate, low cost, high mechanical resistance, and insoluble in water. The aim of this study was to use the NRL as binder in matrix tablets for controlling the release rate of drug. NRL, sodium carboxymethylcellulose, olive oil, Tween 80, and lactose were used as polymer, adsorbent, plasticizer, surfactant, and diluent, respectively. Propranolol hydrochloride was used as a model drug. Propranolol hydrochloride matrix tablets were prepared by conventional heat-melting method. The in vitro release of drug from matrix tablets was determined by UV-Vis method according to dissolution test under Propranolol Hydrochloride Tablets USP30-NF25 monograph. Morphology of propranolol hydrochloride matrix tablet before and after released study was observed by scanning electron microscopy (SEM). It was found that NRL matrix tablets could control the drug release up to 12 hours. The release profiles were best fitted with Higuchi model. NRL amounts affected the properties of the propranolol hydrochloride matrix tablets. Increasing the NRL quantity in the matrices provided the decrease of release rate of drug. SEM photographs showed the number, size, and distribution of pore in propranolol hydrochloride matrix tablets that depended on amount of NRL addition. These results confirmed that NRL was possible to use as binder for matrix tablets in oral drug delivery systems.
Research on the Extraction Methods of Polyhydroxyalknoates and its Thermal Property
Authors: Bian Ming Hong , Luo Hui Bo , Ye Guang Bin , Chen Yan , Yang Xiao Dong , Wang Yi
Published: August 2013

To extract PHAs which produced by Bacillus cereus, three methods were used in this article, such as chloroform extraction, chloroform-hypochlorite dispersion extraction and hypochlorite-surfactant extraction. Also the thermal processing performance of the materials was examined. The results showed that chloroform-hypochlorite dispersion extraction was the optimum method. The PHAs isolated had the molecular weight 5.0×105 and the extraction rate was up to 72.4%. The thermal property of these materials was studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The result showed that the materials extracted by three methods were all of good thermal processing performance. The processing temperature was forecasted as 220°C.
Therapeutic Efficacy of Calcium Hydroxide as an Intra Canal Dressing on Postoperative Reaction of Patients with Residual Pulpitis
Authors: Yang Hui Xiao
Published: August 2013

To evaluate the therapeutic efficacy of calcium hydroxide as an intra canal dressing on controlling postoperative pain and swelling in patients suffering from residual pulpitis. 118 patients with residual pulpitis in their anterior teeth participated in this study. These patients were randomly divided into two groups (group A and group B) of fifty-nine. All teeth were treated with root canal therapy with a two-visit approach. The patients in group A were treated with calcium hydroxide as an intra canal dressing , and in group B using formocresol as an intra canal dressing. All of the patients were followed up for 72 h after each treatment session. The postoperative incidence and severity of pain and swelling were recorded. The data were analyzed by chi-square test and variance analysis. After the first visit, the incidence and severity of pain and swelling showed to be higher in group B and lower in group A. These differences were statistically significant. After the second visit, the incidence and severity of pain and swelling showed to be still higher in group B and lower in group A. But there were no significant difference. Conclusion It is concluded that calcium hydroxide as an intra canal dressing could be effective to decrease the postoperative pain and swelling. It is recommended to use calcium hydroxide as an inter-appointment dressing in teeth with residual pulpitis.
Enantiomeric Separation of 1-Phenyl-1-Propanol Using Calix[4]Arene-Capped β-Cyclodextrin-Bonded Silica Particles as Chiral Stationary Phase in Capillary Electrochromatography
Authors: Zhao Jia , Li Jun , Yong E.L. , Gong Yin Han
Published: August 2013

A new type of calix [ arene-capped (3-(2-O-β-cyclodextrin)-2-hydroxypropoxy) propylsilyl-appended silica particles (C4CD-HPS) has been successfully used as chiral stationary phase (CSP) in capillary electrochromatography (CEC) for separation of enantiomers of 1-phenyl-1-propanol for the first time. C4CD-HPS contains a chiral selector with two recognition sites: calix [arene and β-cyclodextrin. Due to the cooperative functioning of the calix [arene and β-cyclodextrin, C4CD-HPS has exhibited excellent enantioselectivity for the enantiomers of 1-phenyl-1-propanol. After the multiple phenolic hydroxyl groups in the calix [arene moieties are ionized in the running buffer, the bonded stationary phase C4CD-HPS becomes negatively-charged to provide high electroosmotic flow (EOF) in CEC. Fast and high-resolution separation for enantiomers of 1-phenyl-1-propanol has been easily achieved on C4CD-HPS. This new type of chiral stationary phase has exhibited great potential for fast enantiomeric separations in CEC.
Layer-by-Layer Self-Assembly of Carbon Nanotubes with Polyelectrolytes for Biomedical Application
Authors: Su Lin , Zhao Pei Pei , Shi Yun Feng , Yao Li Ting , Xue Wei , He Liu Min
Published: August 2013

The layer-by-layer (LbL) self-assembly of carbon nanotube (CNT)/polyelectrolyte has been widely investigated for various applications. In this study, multi-walled carbon nanotube (MWCNT) was LbL assembled with three positively charged polyelectrolytes, which was PEI, chitosan and PDDA respectively. In order to investigate its potential application in biomedical field, cell biocompatibility was examined by examining the viability and morphologies of NIH-3T3 fibroblasts cultured on the glass coated with the MWCNT/polyelectrolyte assembly multi-layers.
Simulation Analysis of the Sensitivity in Magnetic Induction Tomography Based on Perturbation Theory
Authors: Xuan Yang , Wang Xu , Liu Cheng An , Yang Dan
Published: August 2013

Magnetic induction tomography (MIT) is a noninvasive and contactless imaging modality which aims at the reconstruction of the electrical conductivity in objects from alternating magnetic fields. Filtered back projection reconstruction algorithm is widely used in biomedical imaging field, and tried to use in MIT. Finite element analysis model has been established based on Scharfetter coil-coil model and perturbation theory, then simulated coaxial coil system by ANSYS software, the perturbation aroused by a target object moving on vertical coil axis. The sensitivity of a target object moves in vacuum and a salt solution were calculated respectively, the characteristics of the perturbation sensitivity in a salt solution were analyzed. The conditions of filtered back projection reconstruction algorithm in MIT were discussed.
A Fast Algorithm for Automatic Detection of Anterior Chamber Angle Points and Measurement of Central Corneal Thickness for Anterior Chamber OCT Images
Authors: Du Wen Liang , Tian Xiao Lin , Sun Yan Kui
Published: August 2013

This paper proposed a fast algorithm to detect anterior chamber angle points and measure central corneal thickness for anterior chamber optical coherence tomography (OCT) images automatically. This algorithm uses biggest connected regions method to get the anterior chamber region, and detects the anterior chamber angle points (ACAPs) in this region firstly. Secondly, the algorithm uses ACAPs to obtain the real position of central cornea then measures the central corneal thickness of anterior chamber. The proposed algorithm was tested on 74 anterior chamber OCT images and provided accurate measurements in about 90 milliseconds.
A Sensitive Hydride Generation-Nanogold Spectrophotometric Method for Trace As(III)
Authors: Luo Yang He , Tang Mei Ling , Wen Gui Qing , Yin Wen Qing , Jiang Zhi Liang , Liang Ai Hui
Published: August 2013

In H2SO4 solution, the arsenic was reduced to arsine (AsH3) by NaBH4, and absorbed by solution of H3PO4-HAuCl4-NH4SCN-gum arabic. The Au3+ was reduced to nanogold, which led to the absorption value at 555nm increased. Under the selected conditions, the value was linear to the concentration of As (III) in the range of 0.07-1.10 μg/mL, a detection limit of 0.03 μg/mL. The proposed method was applied to detect As (III) in water samples, with satisfactory results.
Structure Studies on order Assemblage of Cobalt II Complexes
Authors: Gao Jian , Song Ning Ning , Liu Yu , Song Da Jun , Tian Hong Xiao
Published: August 2013

The cobaltII complex [Co (C9H9O3)2(H2O)2], Diaqua-bis (ethylvanillinato-O,O')-cobaltII, the CoII atom is located on a twofold axis and is coordinated by two ethylvanillinate anions and two water molecule in a distorted octahedral geometry . The ethylvanillinate ligand chelates to the CoII atom through its ethyl and hydroxy O atoms,with differing Co-O bond distances (2.282(2) Å and 1.9914(18) Å).Adjacent complex link to each other via hydrogen bonds forming the three-dimensional supramolecular structure.
The Secant Method for Buckling Load of Centrally Compressed Member with Residual Stresses
Authors: Qin Jian , Zhang Jin Miao , Xia Yong Jun
Published: August 2013

A fast method for elastic-plastic buckling of centrally compressed members is put forward, which is suitable for the medium length column considering the effect of residual stresses. The problem of elastic-plastic buckling is simplified as a nonlinear function of axial strain, and the secant algorithm is built based on the nonlinear function. The advantages of the new method are discussed and the iterative calculation process is listed. The new method offers significant improvements in accuracy, robustness and calculation amount of the solution, which can be used for members with any type section. An example of I-shape member is calculated by the new method and the result is compared with the analytical solution. The contrast of the buckling load verifies the reliability of the new method.
The Preliminary Exploring on the Factors Affecting the Performance of Adsorption and Degradation Formaldehyde in Cotton Fabric Treated with Nano-TiO2 and Activated Carbon
Authors: Zhang Hui , Shen Lan Ping
Published: August 2013

The research treated the cotton fabric with nano-TiO2 and activated carbon.The four factors of the dispersion concentration, the activated carbon content, baking temperature and time were selected to be the variables .Then it used the self-made equipment to test the performance of absorption formaldehyde. The single factor affection experiment and orthogonal test were carried out to explore the four factors .The result showed that as these factors increase, to different degrees, the rate of fabric's adsorption and degradation formaldehyde also increase . It provides a theoretical guidance for the development of adsorption photocatalysis cotton decorative fabric in the textile sector.
Effects of Selenium Application in Soil on Formation of Iron Plaque outside Roots and Cadmium Uptake by Rice Plants
Authors: Chang Hong , Zhou Xin Bin , Wang Wen Hua , Zhou Yong Xiang , Dai Wen Cai , Zhang Cheng Min , Yu Shu Hui
Published: August 2013

A pot trial with a soil-sand combination culture in rhizosphere bags was conducted to study the effects of applying Se in soil on formation of iron plaque outside roots, rice growth and absorption of Se and Cd under the control conditions. The results showed that application of low concentration Se (1.0 mg/kg) can promote the formation of iron plaque outside roots, but application of high concentration Se (8.0 mg/kg) can inhibit formation of iron plaque outside roots. Whether applying Cd or not, Se on rice growth had no significant effect, which explained Se on rice growth had not produced toxic effects. With the increasing of Se treatment concentrations, the Cd content of roots, stems, leaves, rice husks and rice significantly decreased. Application of selenium can improve the selenium content in rice, which explained rice had enrichment effect for selenium.
Synthesis of Poly(ethylene glycol) Derivatives
Authors: Chen Hai Yun , Shan Yu Kai , Qin Yu Yue , Zhou Guo Xian , Yuan Ming Long
Published: August 2013

To expand the extent of conjugation with biologically active molecules (biopolymers, peptides, drugs, etc.) and biomaterial substrates, we synthesized a serial of poly (ethy1ene glycol) (PEG) derivatives (PEG-2000-NH2, MPEG-1200-NH2, and APEG-1200-NH2) in three efficient steps. The end groups were characterized by 1H NMR spectroscopy.
Preparation and Characterization of Electrospun PVDF/PMMA Composite Fibrous Membranes-Based Separator for Lithium-Ion Batteries
Authors: Liang Yin Zheng , Cheng Si Chen , Zhao Jian Meng , Zhang Chang Huan , Qiu Yi Ping
Published: August 2013

The poly (vinylidene fluoride)/poly (methyl methacrylate)(PVDF/PMMA) composite fibrous membranes with different blend ratio for use as separator of lithium-ion batteries have been developed by electrospinning technique. The surface morphology and crystal structure of electrospun PVDF/PMMA composite fibrous membranes are characterized using scanning electron microscopy (SEM), attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy and differential scanning calorimetry (DSC).The results indicated that the addition of PMMA into PVDF increased the fiber diameter, decreased the crystalline of electrospun composite fibrous membranes and the good molecular level interaction between these two polymers were obtained. Meanwhile,electrospun PVDF/PMMA (90/10) composite fibrous membranes exhibited the highest ionic conductivity of 2.54×10-3S/cm at room temperature with electrochemical stability of up to 5.0V.
The Corrosion Failure Analysis of Plate Pipe for Plate Heat Exchanger
Authors: Song Wen Ming , Yang Gui Rong , Hao Yuan , Zhang Yu Fu
Published: August 2013

The plate of the heat exchanger leaked owing to its corrosion during the running of the whole equipment. The composition of the failure plate, microstructure, corrosion appearance and the chemical composition of the corrosion products were analyzed through Optical microscope, scanning electron microscope and chemical analysis method to find out the reason of the failure. The results show that the chemical composition of the plate meet the requirement of S31254 (254SMO) according to standard A240 /A240M-2005. The main phase was austenite among which the ferrite distributed in stripe. The corrosion happened firstly at the ferrite area under the condition of running medium with chlorine ion and sulfur ion. Incomplete solution of ferrite during the solid solution treatment was the main cause of spot corrosion, which ultimately resulted in the leaking failure owing to the corrosion.
Novel Methods for Preparation and Surface Treatment of Nano-CaCO3
Authors: Wu Fa Chao , Shen Teng Fei
Published: August 2013

In this work, CaCO3 nanoparticles have been synthesized via heat-treatment of a new precursor. Effect of calcinations temperature on particle size has been investigated. The products were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). nanoCaCO3 was modified using chloroform as solvent and fatty acid as modifier atroom temperature. The advantage of this modification is that it can be proceed at room temperature and it can reduce energy consumption.
Influence of Primary Austenite Dendrite on the Microstructure and Mechanical Properties of Gray Cast Iron
Authors: Zhang Jun Tao , Ren Feng Zhang
Published: August 2013

The formation of the microstructure of gray cast iron is a complex process. There remains many unanswered questions about the process. Using annealing method, the first crystallized primary austenite dendrites from the molten iron was displayed. The room temperature microstructures of gray cast iron with and without Cu, Cr addition were studied. The relationship between microstructure and mechanical property was discussed. The results show that the amount of primary austenite dendrites of the multi-alloyed gray cast iron increases significantly and the secondary dendrite arm spacing seems narrow. The microstructure at room temperature is fine and homogeneous. Tensile strength increases significantly, up to 300MPa with adding 0.58%Cu and 0.29%Cr.
Effect of Sintering Temperatures and Ba/Ti Ratio on Dielectric Properties of BaTiO3 Ceramic
Authors: Li Yuan Yuan , Dong Gui Xia , Zhu Bi Yan , Liu Qiu Xiang , Wu Di
Published: August 2013

As a research object, the samples with various Ba/Ti ratios (Ba/Ti=0.95~1.05) were synthesized by solid phase reaction method. Effect of sintering temperatures and Ba/Ti ratio on dielectric properties and crystal structure of BaTiO3 ceramic were investigated. Crystal structure and crystal phase composition were investigated by scanning electron microscopy and X-ray diffraction. The dielectric properties were studied by Agilent 4294A at 1 kHz. The results show that the BaTiO3 ceramic has high permittivity and dielectric loss at 1340°C. The permittivity of BaTiO3 ceramic with Ba/Ti=0.95 change small as the sintering temperatures vary at 1320°C. With the increasing of Ba/Ti ratio, the Curie temperature first increases and then decreases as the sample sintering at 1320°C. When Ba/Ti=1, the Curie temperature increase with the sintering temperature increasing.
Design and Application of an all Moving Wing Model Limiting and Locking Device
Authors: Lu Bo , Lv Bin Bin , Yu Li , Guo Hong Tao , Yan Yu , Kou Xi Ping
Published: August 2013

To effectively excite the all moving wing flutter model and limiting or quick locking model in case of bigger amplitude of the model, an excitation and limiting and locking device is designed for the high-speed wind tunnel flutter test model. This paper introduces the structure arrangement, control principle and strategy of this device. The wind tunnel flutter test indicates that this device can enhance the SNR of the test data, improve the boundary prediction precision of flutter, prevent the model from entering the flutter divergence state and protect the model and wind tunnel test equipment.
Nonlinear Analysis of Micro Electric Vehicles Shock Absorbing Coil Spring
Authors: Ju Li Ying , Li Yao Gang , Qiao Chang Sheng , Ji Hong Chao , Liu Zhi Ran
Published: August 2013

The article mainly studies the micro electric vehicles shock absorbing coil spring. For its actual working conditions, the finite element analysis software ANSYS is used to analyze the nonlinear of the spring. The large deformation and the contact between flexible surface and flexible surface should be considered in the nonlinear analysis. And we get the spring stress, displacement etc. Then the results are reprocessed. For the shock absorbing coil spring used in the micro electric vehicles, there are no improved research methods and theoretical support, this study provides the basis for optimization design and selection of the shock absorbing coil spring.
Nonlinear Buckling Analysis of Shallow Spherical Shell under Uniform Pressure and Temperature Field
Authors: Zhu Yong An , Wang Fan
Published: August 2013

Shallow spherical shell is an important kind of sensor elastic element. Because of the particular metal material texture, it can work under high temperature field. The nonlinear buckling problems of shallow spherical shell in load and temperature filed are very important. In this paper, nonlinear buckling of shallow spherical shell under uniform pressure and temperature field in simply supported boundary conditions is studied by the modified iteration method, and the analytic formulas for determining the critical buckling load are obtained. The effect of temperature field on critical buckling load and critical geometrical parameter are discussed.
Study on Structural Design and Optimization Analysis for 2V80 Engine Piston Based on Finite Element Analysis
Authors: Du Yun Peng , Hu Guo Liang , Dong Fei
Published: August 2013

According to the experiment of engine bench test and piston's temperature field, the thermal boundary conditions and the mechanical conditions of piston are obtained. Under the condition of mechanical load and thermal load playing, the stress and strain of original engine is simulated and analyzed. Stress concentration and weak structure of original engine is found. The parameter of piston structure is optimized and the optimizations are put forward and analyzed to verify the optimizations' effectiveness. These provide a reference for the digital modeling and numerical analysis to solver engineering problems.
Research on Purification Technics of some Flake Graphite
Authors: Ding Shu Fang , Niu Yan Ping
Published: August 2013

Graphite is the very important nonmetallic ore that high and new technology development needs. According to the ore property, a purification technics of some flake graphite was studies. Firstly, the experiment researched the primary grinding fineness condition test, its result showed that grade has good and recovery is more high when coarse grinding fineness-200 mesh is 66.4%. Then on the basic of the test, a closed trial was conducted by five-times-regrinding and six-times-cleaning, the experimental results indicated that the grade of graphite (Fixed carbon content) is 89.48%, recovery rate reached 97.42%, separation index is better. Finally, the analysis of products showed that fixed carbon content of +100 mesh, +200 mesh graphite flake is respectively 92.90% and 90.53%, so we can choose the multi-grade graphite product.
Digital Design and Implementation Based on MBD
Authors: Chen Qing , Li Liang
Published: August 2013

Model based definition (MBD) is the new trend of CAD technology development. Concerning with current situation of manufacturing industry of our country, the solution of model based digital design and assembling is presented and key issues of its implementation. It enhances design efficiency and product manufacturability.
Researches on Ecodesign in Traditional Folk Packaging
Authors: Yang Fan
Published: August 2013

This article analyzed the concept of ecodesign and its various manifesting modes from the perspective of the traditional folk packaging’s materials and forms. The discovery and recognition of the value in traditional materials can be used for reference by modern packaging design to achieve the goal of ecologicalization and sustainable development.
Honeycomb Radiator Cold Extrusion Forming Research
Authors: Qu Sheng Guan , Liu Li Kui , Li Wen Long , Wang Guang Hong , Li Xiao Qiang
Published: August 2013

Radiators plays a crucial role in thermal performance of LED Lamp, and the latest development of LED honeycomb radiator forming process has been discussed. Moreover, stress-strain state in the dies and blank flow condition with different die structures have been studied by DEFORM. Accordingly the feasibility of the optimization design also has been demonstrated. The results show that the substance flowing has a serious affect on the force to the die. And with an appropriate die structure, the uniformity of forming can be greatly improved and the force to the die can be reduced.
Parameterized Design for Cylindrical Shaft Tapered Screw Blades
Authors: Zhi Ai Di , Zhi Xi Hu
Published: August 2013

Screw blade is the essential part of a screw conveyer. The design of large scale, multiple blades screw conveyer involves complicated calculation and repeated work, is low in accuracy and efficiency. With parameterized design as the guiding principle, this article discusses the mathematical model for the development of cylindrical shaft tapered screw blade, and provides a VB based parameterized automatic drawing design method that allows arbitrary division of the helix angle, on the platform of AutoCAD. Practical experience has shown that the method improves design efficiency and accuracy, and is simple and pragmatic.
An Application Research into the Different-Material Insertion in Knitting Clothing Design
Authors: Chen Shu Cong
Published: August 2013

Knitting cloth is composed of coils, boasting the characteristics of large flexibility, retractility, and easy deformation, which results that its making and handling is greatly different from that of woven cloth, so that the proper utility of different-material insertion in knitting clothing is capable of fostering strengths and circumventing weaknesses. The present paper starts with the functionality features of knitting and woven fabrics, and their functionalities of dressing, namely, style, color, material, carries out an inductive analysis and thereotical exploration, and finally presents thereotical reference and instruction for the innovative design and development of knitting clothing.
Analysis of UAV Main Landing Gear Loads during Wheel Spin-Up Process
Authors: Ma Wu Yuan , Sun Hui , Liu Bo , Jia Hong Guang
Published: August 2013

To understand the wheel spin-up process of UAV main landing gear, this paper constructs the simplified mechanical model. The bilinearity model is used to simulate the relation between tire-runway adhesion coefficient and slip ratio. Some factor influenced the resultant load is analyzed. The axle and flange are analyzed with ABAQUS.
The Shoe Machine Gluing Control System Based on Image Processing
Authors: Shu Yu Feng , Zhang Hai Ying
Published: August 2013

Through an in-depth study of the image processing technology and motion control technology, research and development one glue control system based of image processing for the shoe machine , the system does not need worker repeatedly teach glue path for different shoes, simple operation, and can greatly improve work efficiency.