bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on College Apartment Fire Monitoring System Based on GSM
Authors: Bai He , Gao Yun Shu , Wang Wei , Ran Zhong , Yang Yong Chao , Xu Jian
Published: December 2014

Specifically focusing on the electric safety of students, we proposed a College Apartment Fire Monitoring System using the combination of wireless communication network and environmental sensors. The system adopts GSM as the data carrier and STM32 as data processing chip, combines sensor detection module and power supply control module together, synthesizes the data information from each sensor module, estimates the possibility of catching fire and shuts off the electrical power in the breakdown region timely. At the same time, the system informs the control center and dormitory managing clerks to check in order to minimize the risk of catching fire. This system can monitor the factors of apartment fire, establishing a set of real-time college apartment fire monitoring system.
Effect of Thickness of Pinhole Array on Viewing Angle of Integral Imaging Display
Authors: Ren Zhao Xu , Wu Rui
Published: December 2014

A parameter design of a pinhole array is one of the most important keys to design an integral imaging (II) display using pinhole array. The relationship between the thickness of the pinhole array and the viewing angle of the II display is studied, and the maximal value of the thickness is also obtained. When the thickness of the pinhole array is greater than the maximal value, the viewing angle of the II display is decreased with increasing the thickness of the pinhole array. A prototype of the II display using pinhole array is developed, and the experimental results agree well with the theory.
Development of Equipment for the Measurement of Magnetic Properties of Hard Magnetic Material at Elevated Temperature
Authors: Fan Wen , Hou Rui Fen , He Jian , Zhang Zhi Gao , Lin An Li
Published: December 2014

For application in the magnetic material at high temperature, the equipment for the measurement of magnetic properties of hard magnetic material at elevated temperature has been developed. The temperature coefficient of remanence and coercive, demagnetization curves at different temperatures was measured by this equipment. The heating plate which using the mesh screen printer substrate method was designed to realize the accurate measurement in the quasi closed magnetic circuit .The temperature measuring range is from room temp. 500 °C.
The Design of a Robust Weighted Measurement Fusion Steady-State Kalman Filter
Authors: Liu Wen Qiang , Wang Xue Mei , Deng Zi Li
Published: December 2014

For the linear discrete-time multisensor time-invariant system with uncertain model parameters and measurement noise variances, by introducing fictitious noise to compensate the parameter uncertainties, using the minimax robust estimation principle, based on the worst-case conservative multisensor system with conservative upper bounds of measurement and fictitious noises variances, a robust weighted measurement fusion steady-state Kalman filter is presented. By the Lyapunov equation approach, it is proved that when the region of the parameter uncertainties is sufficient small, the corresponding actual fused filtering error variances are guaranteed to have a less-conservative upper bound. Simulation results show the effectiveness and correctness of the proposed results.
Research for TCM Prescription Compatibility Chemical Components Dose-Response Relationship Using MSC-PLS
Authors: Nie Bin , Wang Zhuo , Yu Ri Yue
Published: December 2014

Study traditional Chinese medicine prescription compatibility chemical components Dose-response relationship based on multiplicative signal correction and partial least squares (MSC-PLS). Method: mathematical modeling base on MSC-PLS. Results: study the compatibility chemical components of the dachengqi decoction; mining the regression coefficient and equation, VIP sorting, loadings Bi plot base on the method. Conclusion: the method mining the data information and optimization the compatibility of the dachengqi decoction cure ileus rats is feasible and effective.
A Parameter-Dependent Approach to Robust H∞ Control of Norm Bounded Uncertain Systems
Authors: Liu Yan , Lin Hong Sheng , Liu Li Mei , Li Ying
Published: December 2014

A new approach to analyze and synthesize linear uncertain systems with time varying norm bounded uncertainty is presented in this paper. First, the uncertainty set is separated into several different sets according to the maximum singular value of uncertainty.Based on the new classification, the original uncertain system is transformed into a Markovian jump system. Second, via a parameter-dependent Lyapunov function, the problems of robust H∞ analysis and synthesis is studied.Based on this, two sufficient conditions for designing parameter-dependent controllers are established. Finally, numerical simulations are used to illustrate the developed method.
Design of Air Conditioning Unit Performance Test Bench for Rail Vehicles
Authors: Li Kui Ning , Chen Shuai
Published: December 2014

Based on the methods and standards related to both domestic and overseas air conditioning unit performance testing, a new air conditioning unit performance test bench for measuring refrigerating capacity has been developed. The test bench, which includes removable exterior environment simulation room and interior environment simulation room, applies air enthalpy method to measure refrigerating capacity of air conditioning unit. The experiment result shows that exterior environment simulation room can save 50% construction cost by using removable room. Its room temperature has high accuracy and stability by using hot air of air conditioning unit and exterior air, which can save 50%-60% energy consumption. The accuracy of testing Bench is less than 4%, which is better than the national standard GB/T 19842-2005.
Mathematical Modeling of Process Moving Cargo by Overhead Crane
Authors: Shcherbakov Vitaly , Korytov Mikhail , Sukharev Roman , Volf Elena
Published: December 2014

According to the proposed design scheme of the overhead crane, with the use of blocks package SimMechanics Second Generation of MATLAB, a conceptual block diagram of connections was developed, according to which the was created Simulink-model of the mechanical system of the bridge crane with PID regulator. Simulink-model allows us to study the operating modes of the overhead crane on the its design stage.
Study on a Kind of Active Balancer Using Planetary Gear Train
Authors: Zhang Ying , Peng Chong , Wang Yu Dong
Published: December 2014

A kind of active balancer using planetary gear train was developed as a solution for dynamic balancing, aiming to balance the mechanisms actively and bring little changes to their original structure and motion. It consists of a two-DOF planetary gear train and a controllable motor. One of the two inputs doubles as the output, connected to the machine to be balanced. The other input is driven by the control motor. The conceptual design of the proposed balancer was discussed. Taking one scheme as example, design procedure of the balancer was introduced. Numerical examples were given to demonstrate the effectiveness of the proposed balancer. The results showed that much more flexibility on the dynamic performance under different working conditions were achieved by selecting suitable input speed trajectories and structural parameters of the planetary gear train of the active balancer.
Study on the Ratio Control of Metal Belt CVT Based on the Hardware in the Loop Simulation
Authors: Wang Yu , Shi Jian Fei
Published: December 2014

The study investigates the structure and characteristic of Continuously Variable Transmission (CVT) through building the hardware-in-the-loop test bed of the CVT. Matlab/Simulink is utilized to establish a vehicle simulation model and a speed ratio and clamping force coordinated control model. In addition, the speed ratio test, based on the active coupling control strategy, is carried out with the result of contrast curves between coupling control and traditional speed ratio control strategy. The real-time simulation proves a better controlling effect.
The Automatic Control Device for Opening Almonds Machine
Authors: Wei Ze Ding , Han Ru Tao , Jia Yong Hui
Published: December 2014

Opening the almond currently rely on the manual to complete and is unable to meet the requirements of mass production. For the design of almonds opening machine of automatic control device, we determine the morphological changes, vibration characteristics, extrusion force changes and other parameters of the almond of opening moments, so as to provide calculation basis for choosing suitable step motor and determining parameters of circuit’s electrical components. Electromagnetic buzzer as a vibration sensor to detect the vibration signal, the photoelectric sensor to detect the almond’s position signal, the proximity switch sensor to detect the working position and amplified signals to process circuits, under the control of MCU, the step motor driving a load let the almond opening process achieve the automatic.
The Design of Feed Drive System of Economical CNC Milling Machine
Authors: Yang Xiao Jing , Wang Jia Xin
Published: December 2014

The feed drive system is important functional components which effects on precision and efficiency of transmission and cost of CNC milling machine tools. So the designe of the feed drive system of economical CNC milling machine tool is researched. Firtsly the general design scheme which includes the transmission scheme and basic parameters of CNC milling machine tool is determined. Then according to the milling force calculated during mill processing, linear rolling guide, ball screw and stepping motor of X axis and Y axis of feed drive system are respectively calculated, selected and checked in detail. Using the Solid works software for 3D modeling and assembly of mechanical parts of feed drive system, By the scheme comparison, selecting the CNC system of Huazhong century star HNC-21 and accomplishing the electrical connection of CNC system.The feed drive system of economical CNC milling machine in the desing is high performance and low cost,and meet accuracy requirement.
The Research of Equalizing Charge Control Strategy for Series Connected Power Battery
Authors: Yu Wei Bo , Liu Wen Qian , Wei Lai , Liu Ke Ping
Published: December 2014

In order to meet the demand of power supply voltage and capacity, power battery usually uses multiple single cells in series. Due to that performance difference will be increased in the process of charging and discharging, eventually it leads to a sharp drop in battery performance and shorten the cycle life. By analyzing the causes of battery failure in advance, the design is based on the energy storage the inductance of the non dissipative equalization circuit. According to the different status of a single cell in the battery pack, the fuzzy control algorithm can fine-tuning the charging current of single battery through balanced circuit, so as to realize rapid equalization charging of the battery pack. This paper makes a comparison with the charging simulation experiment by using charging model of four batteries in series. Experimental results show that the imbalance between the battery pack can cause damage to the battery and cannot make each battery charged in. The designed balance circuit and fuzzy equilibrium controller designed can realize lossless transfer of energy to reduce the inconsistency of each single cell and achieve the requirement of the equalizing charge.
A Novel Weighted Distance KNN Algorithm Based on Instances Condensing
Authors: Tao Gang , Yan Yong Gang , Zou Jiao , Liu Jun
Published: December 2014

As a nonparametric classification algorithm, K-Nearest Neighbor (KNN) is very efficient and can be easily realized. However, for large dataset, the computational demands for classifying instances using KNN can be expensive. A way to solve this problem is through the condensing approach. It means we remove instances that will bring computational burden but do not contribute to better classification accuracy. This paper proposes a novel weighted distance KNN algorithm based on instances condensing algorithm. The proposed idea is to extract some representative instances and take the processed result as a new training sample set. Meanwhile, use the distance-weighted WDKNN algorithm to improve the prediction accuracy, our experiments show that the proposed strategy can dramatically shorten the time consumption compared with the traditional KNN. On average, the speedup ratios improve 90% while classification accuracy only has 2% decreases.
Research and Design of Intelligent Energy-Saving Control Device for Streetlamp
Authors: Hao Guo Fen , Li Wen Cai , Liu Chun Ling , Zhao Ke Xin
Published: December 2014

Faced with a serious case of energy waste in the city's public lighting, in this paper, we design a streetlamp which can turn on and off based on natural illumination lights. Depending on the people need for each grade road illumination of different time, it can automatically adjusts the applied voltage lighting by using load regulator, to achieve the purpose of saving lights, without regard to seasonal variation. This paper introduces the control principle, hardware and software flow of the system. Practice shows that the system is scientific and reliable and its energy-saving effect is obvious, and the system has high promotional value.
Electromagnetic-Thermal Coupling Simulation by ANSYS Multiphysics of Induction Heater
Authors: Jiang Ya  Peng , Wang Dong , Zhang Qing  Hu , Chen Jun Quan
Published: December 2014

Induction heating is widely used in Industry, it’s meaningful to control the process of heating accurately. In the heating process, electromagnetic field and Thermal field are strongly coupled. Through the comparison of two-way coupled and single-way coupled, this paper verified the importance of multiphysics simulation in heating process by simulation of the cycle induction heater.
Modified Prandtl-Ishlinskii Model for GMA of High-Load Pinhole Boring System
Authors: Zhai Peng , Xiao Bo Han , Zhou You
Published: December 2014

High-load pinhole is the key to improve the loading ability of power units. In this paper, a feedforward compensation method by modified Prandtl-Ishlinskii (P-I) model is proposed to characterize the hysteresis of Giant Magnetostictive Actuator (GMA) used on pinhole boring system, and the validation of model is examined by comparing the input-output relations of model and experimental data under 20Hz. Finally, a feedforward controller of inverse P-I model is designed to compensate the hysteresis. The experiments show hysteresis nonlinearity of GMA is reduced effectively under a wide frequency band from 21% to 2.3%.
Study on Optimization of Cargo Space Allocation Based on Jointown Pharmaceutical Logistics Center
Authors: Ji Shou Wen , Wu Xi , Wang Yun Fei , Su Gang
Published: December 2014

With the rapid development of modern logistics technology and automation of information technology, the AS/RS has been more and more widely used in the field of medicine logistics. In order to more effectively manage AS/RS, improve the rationality of the layout, reduce the number of goods handling and storage costs, it demands to optimize the cargo space allocation for goods .This article adopts multi-objective genetic algorithm to solve the optimization problem of cargo space allocation modeling, and use Jointown pharmaceutical logistics center as an example to further verify the analysis, getting the ideal optimization results and the simulation image.
PLC Based Fault Diagnosis System for Ion Nitrogen Furnace
Authors: Cai Li Min , Li Peng
Published: December 2014

In this paper, we present a fault diagnosis method for nitrogen furnace. According to the analysis of the typical faults of the nitrogen furnace, we use the sensor of programmable logic controller to obtain its circuit parameters, send them to industrial control computer, and diagnose the faults using the configuration software. Experiments demonstrate that our method can collect, display, storage, and diagnose the fault information in a real time, which confirm its potential applications in the nitrogen-chemical industry.
Bionic Design and Stress Field Analysis of Brake Disc’s Surface Micro-Structure
Authors: Wang Li Xin , Gao Ya Yan , Zhai Li Gang
Published: December 2014

The uneven friction of brake disk leads to the brake failure, which frequently results in serious traffic accidents. Based on the excellent wear-resisting properties of locust’s non-smooth surface structure, bionic brake disc with special surface micro-structure was designed. Utilizing ANSYS Workbench, the braking time and the stress distribution of both the bionic model and the smooth model during the whole process of brake under different initial velocity were analyzed. Compared to the smooth model, results showed that the braking time and contact stress decrease in a certain extent, indicating brake disc with special surface micro-structure exhibits relatively excellent braking performance and wear resistance. The results provided theories for exploring an optimization the method used to design brake discs with excellent braking performance and wear resistance.
Design and Analysis of Bearing Transmission Component Based on Compliant Parallel Spring Mechanism
Authors: Di Jie Jian , Du Xiao Wu , Zhao Yu Xia , Zhao Quan Liang
Published: December 2014

This paper presents a new design scheme about the bearing transmission components based on compliant parallel spring mechanism, which is applied to small and medium scale impulse plate flowmeters. The detection components can be effectively carried with a more accurate trace of displacement in the horizontal direction. The mechanism design has advantages of no relative motion and friction between the structure components, and is well adapted over the traditional bearing components, based on the principle of compliant parallel spring mechanism. Thus, the measure precision of impulse plate flowmeter and working reliability are effectively improved. Firstly, the characteristics of displacement, strength and natural frequency are analyzed theoretically, and then the simulation of static strength, modal and fatigue are performed by the CAE software. The rationality and feasibility of this design scheme are further verified by the simulation results, which has certain guiding significance for the design of the actual product.
A General Model of Contention-Tolerant Crossbar Switch
Authors: Huang Wen Zeng , Fang Zhi Yi , Qu Guan Nan , Zheng S.Q. , Chen Zhong
Published: December 2014

Recently, we proposed an innovative switch architecture called Contention-Tolerant Crossbar (CTC) switch. It is able to tolerate conflicts in switch fabric. The schedulers of CTC are distributed in inputs and operate independently and in parallel, which releases the central controller and cooperative arbiters, and largely reduces the hardware complexity. In this paper, we discuss a general model by discussing a CTC structure with X inputs and Y outputs called (X, Y)-CTC Structure. And a queueing network model is developed for analyzing the throughput of this general structure. Since it has the main characteristics of CTC, it can be seen as the basis of modularity study of Contention-Tolerant Switches.
A Security Power Defense System Based on Cloud Computing
Authors: Xu Hong Fei , Pang Si Rui , Du Jian Wen , Li Xue Mei
Published: December 2014

A system includes three power information security defense line is constructed, to achieve the information network, information outside the network, scheduling data network depth protection. According to the information security protection requirements, starting from the overall structure of information systems, taking into account the information system to schedule production system as the core, based on independent research and development of core information security isolation unit, set up three lines of defense in the power of information systems, electricity secondary system, information network systems, information systems outside the network partition protection.
An End-to-End Encrypted Scheme for PoС Based on Cellular Network
Authors: Li Hong Liang , Li Li Fu , Wang Yu
Published: December 2014

PoC is an instant communication service based on cellular network, which can transmit information of voice by VoIP. In order to increase the security of network transmission of PoC system, this paper proposes an end-to-end encrypted scheme which implement information synchronization of voice data by using stream encryption.
Implementation of MPLS Network Delay Measurement with 1588 Precision Time Synchronization Protocol
Authors: Yang Hong Jun , Liu Yong Liang , Yu Xiao Hong , Song Gang
Published: December 2014

The right measurement of network time delay is the basis of a good network service. With the research on the IEEE 1588 precision time synchronization protocol and MPLS (Multi-protocol Label Switching), a method to realize the network time delay measurement in the MPLS network is introduced. It is also pointed out that this method has very important significance for the rapid deployment of network and the network quality evaluation.
LMMSE Equalization Algorithm Research Based on 0.5chip Level
Authors: Liu Shan Ling
Published: December 2014

The LMMSE equalization filter based on minimum mean square error (MMSE) criterion can effectively suppress the inter-symbol interference caused by multi-path and recover the orthogonality among the spreading codes. In this paper, LMMSE equalizer with 0.5chip level algorithm is studied in the downlink of the UTRA HSPA+ system and the simulation results show that the performance of algorithm with 0.5chip level is better than the algorithm with one chip level.
Swelling Behaviour of Carboxymethylated Tamarind Gum
Authors: Ponnikornkit Bantita , Ngamsalak Chanisara , Huanbutta Kampanart , Sittikijyothin Wancheng
Published: December 2014

Chemical composition and swelling behaviour of crude tamarind gum fromTamarindusindicaseed were observed and compared with modified gums as used carboxymethylation reaction. The condition of carboxymethylation at 70°C for 60 min of reaction time and methanol as solvent media was used. Different mole ratios of sodium hydroxide to monochloroacetic acid (nNaOH/nMCA) from 1 to 2.78 were studied and then its degree of substitution (DS) of both crude and carboxymethylated tamarind gums was also determined and compared. Then the swelling property of all samples was evaluated by using gravimetric technique (weight difference between dry and wet polymer). The results from swelling test showed that crude tamarind gum behaved low swelling while carboxymethylated tamarind gums showed high swelling profiles, ranged from 17 to 81% during 60 min. This is a preliminary assessment to expressing pharmaceutical application possibility of tamarind gum as disintegrant, diluent and drug release controlling agent.
Comparison of Solvent Miscibility of Coconut Oil and its Modified Forms
Authors: Pengon Sirikarn , Ponphaiboon Juthaporn , Chaidedgumjorn Amornrat , Limmatvapirat Chutima , Sriamornsak Pornsak , Limmatvapirat Sontaya
Published: December 2014

Solvent miscibility is an important parameter for dosage form design, especially for liquid preparations. The purpose of this study was to investigate the polarity change of coconut oil (CO) after modification by glycerolysis and its consequence on solvent miscibility. Coconut oil and its modified form were separately mixed with various solvents which had different dielectric constant and then determined for their miscibility. The thin layer chromatography (TLC) was also used to clarify the composition of coconut oil and its modified form. The result indicated that coconut oil and modified coconut oil (MCO) were miscible with low polarity solvent having the dielectric constant from 1.94 to 21.5 (from hexane to acetone) and were immiscible with high polarity solvents possessing the dielectric constant over 42.5. However, MCO demonstrated miscibility with ethanol, propylene glycol and methanol (dielectric constant 24.5, 32.1, 32.7) while coconut oil did not compatible with those solvents. The result suggested the polarity increment of MCO after glycerolysis. The presence of high polar compounds, including monolaurin and lauric acid in MCO was later clarified by TLC. In conclusion, the knowledge gained from this research may provide the preliminary data for formulation of MCO into suitable liquid dosage form in the near future.
N-Benzyl Chitosan In Situ Forming Antimicrobial Gel for Periodontitis Treatment
Authors: Mahadlek Jongjan , Sajomsang Warayuth , Phaechamud Thawatchai
Published: December 2014

The objectives of research were to synthesizeN-benzyl chitosan and to investigateN-benzyl chitosan on the properties ofin situforming gel such as viscosity, syringeability, drug release and antimicrobial activity againstPorphyromonas gingivalis.N-benzyl chitosan was synthesized and determined by FTIR. The increased amount ofN-benzyl chitosan apparently increased the viscosity and syringeability of this system.N-benzyl chitosan gel could prolong the release of doxycycline hyclate and showed the antimicrobial activity againstPorphyromonas gingivalis.N-benzyl chitosan systems could be delivered from syringe through needle for periodontitis treatment.
Quaternized Chitosans as Gene Delivery Carriers: Effect of Degree of Quaternization
Authors: Leksantikul Lalita , Sajomsang Warayuth , Rojanarata Theerasak , Ngawhirunpat Tanasait , Opanasopit Praneet
Published: December 2014

The objective of this study was to investigate the transfection efficiency of quaternized chitosan or trimethylated chitosans (TMCs) using the plasmid DNA encoding green fluorescent protein (pEGFP-C2) on human cervical carcinoma cell line (HeLa cells). The factors affecting the transfection efficiency, e.g. degree of quaternization (DQ) and polymer/DNA weight ratio were evaluated. The results revealed that the complexes of TMC30 with DNA had the highest transfection efficiency and safety followed by the complexes of TMC60 and TMC94, respectively. Increasing the DQ of chitosan not only improve the efficiency of gene delivery, but also increase cytotoxicity. In conclusion, TMC30 showed elevated potential as a gene carrier by efficient DNA condensation and mediated the highest level of gene transfection with negligible cytotoxicity in HeLa cells.
Determination of Required Hydrophile-Lipophile Balance Value of Modified Coconut Oil
Authors: Tubtimsri Sukannika , Limmatvapirat Chutima , Sriamornsak Pornsak , Limmatvapirat Sontaya
Published: December 2014

Hydrophile–lipophile balance (HLB) is a key parameter for formulation of emulsions. Recently, modified coconut oil (MCO) was successfully developed as antimicrobial oil and was attempted to use as active ingredient in emulsions. Therefore, the aim of this study was to determine the required HLB of MCO. The emulsions was produced with different ratios of emulsifier mixtures of Tween® 80 and Span® 80 , giving HLB from 4.3 to 15.0 and was investigated in respect of their emulsions stability. The result showed that an emulsion with HLB value of 12 demonstrated the most stable in terms of smallest droplet size and minimal size distribution. The stability was also later confirmed by centrifugation and temperature cycling. The emulsions which possessed HLB values closed to required HLB demonstrated minimal creaming and cracking upon accelerated stability study. In conclusion, this study could provide the guideline for formulation of the stable MCO emulsions which may be further developed into suitable dosage form.
Application of Eutectic Solvent to Preparation of Ibuprofen Suspension by Emulsion Evaporation Method
Authors: Tuntarawongsa Sarun , Phaechamud Thawatchai
Published: December 2014

Menthol was used as sublimate eutectic compound to prepare the volatile eutectic solvent by mixing with camphor, borneol orN-Ethyl-5-methyl-2-(1-methylethyl) cyclohexanecarboxamide (WS-3). The system of menthol:camphor, menthol:borneol and menthol:WS-3 in various ratio (1:9 to 9:1) was characterized. The 5:5 menthol:camphor system showed the highest evaporation rate. Ibuprofen dissolved in eutectic solvent was used as internal phase of emulsion whereas tween80 was used as emulsifier. Eutectic solvent was evaporated to induce the transformation of emulsion droplet to small particle. Eutectic could be used as solvent for preparing small size suspension (14.81±0.44 µm) without organic solvent used.
Thermally Crosslinked Chitosan-EDTA/PVA Electrospun Nanofiber Mats: Crosslinking Conditions
Authors: Tonglairoum Prasopchai , Sutananta Wanchai , Rojanarata Theerasak , Ngawhirunpat Tanasait , Opanasopit Praneet
Published: December 2014

This work was aimed to develop thermally crosslinked chitosan/PVA nanofiber mats. The CS/PVA nanofibers were fabricated using elctrospinning process. The appropriate crosslinking temperatures and crosslinking times in order to thermally crosslinked CS/PVA nanofiber and physicochemical properties of the thermally crosslinked nanofibers were investigated. The morphology of the nanofiber mats was investigated by scanning electron microscopy (SEM). The water insolubilization and FTIR were employed to evaluate the success of crosslinking. Increasing the crosslinking time and temperature, the crosslink was increased, thus causing a decrease of water solubilization. The temperature and time for successful crosslinking were 180-200 °C and 0.5-5 h, respectively.
Determination of Monolaurin in Solution Preparations Composed of Modified Coconut Oil Using GC-FID
Authors: Ponphaiboon Juthaporn , Pengon Sirikarn , Chaidedgumjorn Amornrat , Limmatvapirat Sontaya , Limmatvapirat Chutima
Published: December 2014

A combination of liquid-liquid extraction (LLE), column chromatography (CC) and gas chromatography-flame ionization detector (GC-FID) were performed to analyze different monolaurin (ML) concentrations in the solution preparations composed of modified coconut oil (MCO). LLE with dichloromethane has been used for the first time to extract ML from solution preparations. The resulting extract was individually purified by CC using silica gel to remove other interfering excipients. ML was detected by TLC and quantified using GC-FID. The combination method is simple and inexpensive and might be used with solution preparations composed of MCO.
Effect of Azadirachta indica A. Juss var indica, Nicotiana tabacum L., and Derris elliptica (Roxb.) on Growth of Duckweed
Authors: Phuagphong Patamawan , Nawanopparatsakul Srisombat , Kitcharoen Nudchanart
Published: December 2014

The study was designed to evaluate the inhibitory effects of selected herbs on plant growth. Three insecticides containing plants (leaf of Azadirachta indica A. Juss var indica (AI), Nicotiana tabacum L. (NT), and root of Derris elliptica (Roxb.) (DE) were selected for various solvent extractions. Five extraction solvents: methanol, hexane, dichloromethane, butanol and aqueous were used in this study. The test method was lemna phytotoxicity assay which measured the inhibitory effect on duckweed, Lemna minor growth. This toxicity test proved to be a practical bioassay method because this method is simple, sensitive and cost effective. Butanol extracts of AI were shown to have more inhibition activity on duckweed growth than NT (% inhibition growth rate is 66.08, 27.08 respectively). Butanol extracts of AI had inhibitory effect (EC10) of 40.87 μg/ ml while dichloromethane extracts had EC10 of 131.72 μg/ ml. It could therefore be concluded that butanol extracts of AI showed the greatest inhibitory effects. The results from this study suggest that butanol extracts of AI were the most promising candidates for biological weed control and might be used as potential natural herbicides or as alternatives for the reduction of chemical herbicides. The study is worthy of further investigation since this could provide potential bioherbicide and may lead to the discovery of new effective and applicable bioherbicide.
Anti-Bacterial from Moringa oleifera Lamk Crude Extracts
Authors: Pamonsinlapatham Perayot
Published: December 2014

Moringa oleiferaLamk (Moringaceae) is a worldwide use for food and traditional medicine. In this study, plants were separated into seven parts: 1) Leaf, 2) Drum, 3) Branching, 4) Seed, 5) Outer stem, 6) Stem bark, and 7) Root, respectively. Then, they were extracted by two different methods: methanol soxhlet extraction and ethanol maceration. All crude extracts were tested for anti-bacterial activity by agar diffusion method and colorimetric micro-dilution plate technique. The results showed that 7 parts of Moringa crude extracts had low anti-bacterial activity againstStaphylococcus aureus,Escherichia coli, andPseudomonas aeruginosawhen compared with standard antibiotic (ampicillin or gentamycin). In conclusion, anti-bacterial effects ofM. oleiferacrude extracts had low anti-bacterial activityin vitrotest.
Evaluation of Curcuminoids Effervescent Floating Tablets
Authors: Treesinchai Sakonjan , Puttipipatkhachorn Satit , Pitaksuteepong Tasana , Sungthongjeen Srisagul
Published: December 2014

The objective of this study was to develop and evaluate curcuminoids effervescent floating tablet. The system consists of a curcuminoids-containing core tablet coated with a gas forming layer (tartaric acid layer and sodium bicarbonate layer divided by a protective layer (hydroxypropyl methylcellulose)) and a gas-entrapped membrane (Eudragit® RL 30D), respectively. The floating tablets using lactose as a filler showed higher drug release than those using microcrystalline cellulose (MCC) or MCC:lactose as a filler. However, type of core tablet fillers did not affect time to float of the floating tablets in 0.1 N HCl. Increasing amount of gas forming agent reduced time to float and increased drug release from the floating tablets. The floating tablets showed good floating properties in 0.1 N HCl, however, curcuminoids released was very slow. Addition of surfactant (1%w/v sodium lauryl sulfate (SLS)) in 0.1 N HCl could improve drug release of the floating tablets but it increased time to float and caused the floating tablet ruptured. The floating properties and drug release from curcuminoids effervescent floating tablets seemed to depend on formulation variables. The higher coating level or another type of gas-entrapped membrane may be need for further study.
Azelaic Acid Dry Emulsion
Authors: Kongmuang Somlak , Tepsukon Khaw-on , Yodwandee Pawitra , Laovanichkul Porntipa
Published: December 2014

Azelaic (AZ) acid is a non antibiotic drug used for an acne treatment. The AZ dry emulsion power was prepared by mixing power of AZ with dry emulsion base. The 20% AZ cream was obtained by addition of water into powder mixture with a ratio of 1:1 by weight. The dry emulsion base consisted of virgin coconut oil with an emulsifier, hydroxyproplymethylcellulose (HPMC). The physical properties of each primary coconut oil emulsion (COE) were evaluated as percent creaming, theirs viscosity and particle sizes. The results were shown that the emulsion system of 7.5% HPMC provided the suitable formulas with oil droplet particle size 1.23 ± 8.15 micrometer and its viscosity of 30405.02 ± 480.58 cps. After drying process, the moisture content of coconut oil dry emulsion (CODE) was 2.94%. The yield percentage of dry powder was 58%. Moreover, the flowability of dry emulsion powder was appeared to be fair (with an angle of repose of 35.35). After dry emulsion powder mixing with 20 % AZ and water, the AZ cream was appeared to be stable for at least one week with no significantly different in pH and amount of AZ. Thus AZ dry emulsion preparation could be used an alternative recipe for acne treatment with good stability during one week after reconstitution.
Formulation and Physicochemical Evaluation of Topical Preparations Containing Extract of Clerodendrum disparifolium
Authors: Chinatangkul Nawinda , Phosrithong Narumol , Nuchtavorn Nantana , Rattanapit Teedanai , Mongkol Chonnawat , Chutipanyaboot Poompat
Published: December 2014

Clerodendrum
disparifolium is a Thai herbal medicine, which is used for the treatment of insect bites and sting reactions by applying finely crushed leaves to the inflamed area. However, this usage is inconvenient. The study aimed to develop gel-and cream-based formulations containing 0.5 %w/v of C. disparifolium extract, and evaluate their physicochemical properties. Different topical formulations were prepared using Carbopol 934 for gels and stearic acid for creams by varying their concentrations. The results showed that gel-based formulation containing Carbopol 934 in the range of 0.5-1.0 %w/w had good appearance, appropriate spreadability (7.30-8.70 cm) and viscosity (33,100-68,920 centipoise (cps)). The pH of gel-based formulation ranged from 6.01 to 6.11. For cream-based formulation containing 10-12 % w/w of stearic acid exhibited good physicochemical characteristics. The spreadability, viscosity and pH were 5.00-5.50 cm, 110,050-174,900 cps and 6.03-6.08, respectively. The results provided the suitable formulations, which should be continuously developed for large-scale pharmaceutical production.
Optimized Design of Double-Loops Controller for Single-Phase Pulse Rectifier without LC Resonant Filter Circuit
Authors: Zhang Wen Ming , Li Yong Xin , Ge Xing Lai , Lu Yang
Published: December 2014

Research on the lightweight issue of DC-link is an important direction in modern AC drive electric locomotive. Canceling LC filter circuit is an important way to achieve the goal of lightweight. Therefore, this paper focuses on single-phase pulse rectifier without LC filter circuit. The generation mechanism of DC voltage ripple and network-side current harmonics in grid-side converter is derived. Then, aiming to eliminate the current harmonics, the N-order notch filter and PR controller are introduced to the double-loops controller. The loop of voltage outer controller with N-order notch filter can filter out the ripple of DC-side voltage effectively without affecting the dynamic performance of the controller system. Meanwhile, the loop of current inner controller with PR controller can achieve zero steady-state error control to both the fundamental and harmonic current, and can suppress the low order harmonics in the line current effectively. Analysis shows that replacing the original L2C2 filter circuit with software controller is feasible. Finally, the validity and effectiveness of the proposed scheme are verified in computer simulation.
Simulation of Distributed Photovoltaic Power Connecting to Grid Based on ETAP
Authors: Wang Wen Bin , Xiong Jun Jie
Published: December 2014

Against the State Grid Corporation of integrated demonstration project pilot project Gong qing smart grid demonstration project 1.5MWp rooftop PV projects access, combined with the actual situation, combined with the ETAP software features of advanced power quality analysis , first proposed using ETAP software for power quality analysis and evaluation of two kinds of access solutions , to establish the model flow calculation example, three different nodes of the short circuit calculation and harmonic calculations for the power sector access system designed to provide a reference.
Microstructure and Reinforcing Mechanisms of Boron Carbide–Cerium Boride Porous Composites
Authors: Peng Ke Wu , Ma He Li , Gong Chang Wei , Chen Ren , Tan Zhao
Published: December 2014

boron carbide–cerium boride porous composites are prepared by hot pressed sintering, and mechanical properties and microstructure of boron carbide–cerium boride porous composites were tested. The results show that Flexibility strength of B4C-CeB6 porous composites is greatly improved compared with that of monolithic porous boron carbide. B4C react with CeO2 to completely form CeB6 in porous composites. CeB6 particles in B4C grain boundary are produced by in-situ reaction. The presence of CeB6 reinforcing particles could also suppress growth of B4C grains which normally leads to improved strength.
A Higher-Dimensional Lie Algebra and 4×4 Discrete Soliton Hierarchy with Self-Consistent Sources
Authors: Li Li
Published: December 2014

In this paper, we aim to construct a super integrable discrete soliton hierarchy with self-consistent sources. A new isospectral problem is firstly presented, and we consider a discrete soliton hierarchy with self-consistent sources by using Lie algebra . Then, a new higher dimensional super integrable discrete soliton hierarchy with self-consistent sources is obtained. The method can be generalized to other soliton hierarchy with self-consistent sources.
Construction of Compactly Supported Nonseparable Orthogonal Wavelet with Dilation 4
Authors: Yang Hua E
Published: December 2014

In this paper, we give a method for the construction of high dimension nonseparable and compactly supported orthogonal wavelet bases and the method to construct orthogonal wavelet bases are nonseparable . The orthogonal wavelets are associated with dilation 4.
Study on Connectedness of Flexible Housing as an Application of Space Syntax
Authors: Son Jung Ho , Park Ho Young , Kim Do Bum
Published: December 2014

The flexible housing is a house to be able to change space, depending on the needs of dwellers in order to adapt diversity and change of resident’s life. This report studies the characteristic of space on the flexible unit planning by analyzing justify graphs according to change of rooms and change of space between rooms. The flexible housing can be classified as the central core type and central hall type, the central core type shows a ring type for improving the connectedness between spaces, and central hall type appeared to be a tree type to create independent rooms for flexibility.
Sybil Node Discovery Based on Group Location Information
Authors: Lu Peng , Zhang Guang Wei , Xu Xiao Bin , Yang Fang Chun
Published: December 2014

The paper proposed a Wireless Sensor Network (WSN)’s Sybil node discovery method based on groups relative location information. By setting the distributed algorithm of node group, the relative locations of each node with its surrounding and interactive nodes are analyzed location, interactions of surrounding location information are done by a certain mechanism. According to group location information and data filed, the clustering analysis of location information is carried out. This is used to discover the nodes which are obviously closer than others location. Therefore recognition and tolerance of Sybil nodes are implemented. The simulation results indicate that the proposed method has much lower computational cost and implements load balancing among different nodes,. In addition, the proposed method is able to discover Sybil nodes in wireless sensor networks timely as well.
The Research on the Axis-Symmetric Development and Verification for the Positive Scheme Numerical Method
Authors: Zhong Jian Lin , Le Gui Gao
Published: December 2014

The mathematic express of positive scheme axis-symmetric Euler equations is derived. With the numerical calculation of oblique shocks regular reflection problem, the validity of the positive scheme method and the self-programmed codes is verified. The positive scheme method is developed to solve the axis-symmetric Euler equations and then used to simulate the supersonic axis-symmetric flow over missile afterbody. The results show that: the numerical simulation match well with the experimental results and the numerical results obtained by the already existing high accuracy scheme method, the correctness of the development of positive scheme method is verified.
Quantitative Models for Complex Physical Systems
Authors: Fu Jun , Wu Jin Zhao , Zhou Ning , Tan Hong Yan
Published: December 2014

We present a quantitative model, called metric hybrid automata, for quantifying the behaviors of complex physical systems, such as chemical reaction control systems, manufacturing systems etc. Due to the introduction of a metric, the state space of hybrid automata forms a metric space, in which the difference of states can be quantified. Furthermore, in order to reveal the distance of system behaviors, we construct the simulation distance and the bisimulation distance, which quantify the similarity of system behaviors. Our model provides the basis for quantitative analysis for those complex physical systems.
A Comparative Study on Single Display and Region-Based P300 Speller Paradigms for Brain-Computer Interface
Authors: Li Qi , Liu Shuai , Cao Kai , Li Jian , Shi Kai Yang , Wu Long Fei
Published: December 2014

Nowadays, the event-related potential (ERP)-based spelling device, often referred to as P300-Speller, is the most popular Brain-computer interface (BCI) which can provide a new communication path between patients suffered amyotrophic lateral sclerosis (ALS) with the outside world. At present, there are various P300 paradigms for P300-Speller, but no matter the accuracy or the speed cannot be supplied in our daily life. In this paper, an experiment based the two paradigms was proposed and operated to figure out which paradigm is much better between single display (SD) paradigm and region-based (RB) paradigm. 5 naive subjects participated the experiment and concluded that SD-Speller is superior to RB-Speller when the ISI was set 150ms. This result provides relevant theoretical basis for designing better graphical interface based on BCI.
Hadamard Transform Combined with PTS for PAPR Reduction in Direct-Detection Optical OFDM System
Authors: Li Hui , Zhang Xu , Guo Lei , Liu Ye Jun , Gong Xiao Xue , Zhou Yu Fang
Published: December 2014

High Peak-to-Average Power Ratio (PAPR) of the Orthogonal Frequency Division Multiplexing (OFDM) signal is one of the limitations to the transmission performance of optical OFDM system. In this paper, we propose a novel hybrid PAPR reduction technique called Hadamard Transform Combined with Partial transmit sequence (HTCP). The proposed HTCP scheme combines the merits of two complementary techniques, i.e., Hadamard transform and Partial Transmit Sequence (PTS), to improve the performance of the optical OFDM system in terms of PAPR and Bit Error Rate (BER). Simulation results show that the HTCP scheme has better performance with regard to PAPR and BER compared with the case of applying only the Hadamard transform or PTS technique.
A Sensitivity Analysis of Train Speed and its Effect on Railway Capacity
Authors: Bevrani Bayan , Burdett Robert , Yarlagadda Prasad K.D.V.
Published: December 2014

Increasing train speeds is conceptually a simple and straight forward method to expand railway capacity, for example in comparison to other more extensive and elaborate alternatives. In this article an analytical capacity model has been investigated as a means of performing a sensitivity analysis of train speeds. The results of this sensitivity analysis can help improve the operation of this railway system and to help it cope with additional demands in the future. To test our approach a case study of the Rah Ahane Iran (RAI) national railway network has been selected. The absolute capacity levels for this railway network have been determined and the analysis shows that increasing trains speeds may not be entirely cost effective in all circumstances.
Batch Picking Method for Bookstore Distribution Center
Authors: Wu Ya Ping
Published: December 2014

Order picking for bookstore distribution centers was studied. The batch picking method is proposed based on association rule data mining and 0-1 integer programming for the characteristics of bookstore distribution operations such as multi-variety, small-batch and high-frequency. The associations between orders is mined by apriori algorithm. Orders are grouped into batches by establishing and solving 0-1 integer programming to maximize the support value of association between orders. This model is applied in the bookstore distribution center and application results show the effectiveness of the proposed method.