bluuebunny/crossref_metadata_2025 huggingface dataset:
Based on Extreme Dynamic Optimization of Mill Load Optimization Algorithm
Authors: He Xiao Qiao , Wang Jian Min , Zhao Ye
Published: January 2014

Grinding mill power consumption is one of the largest operations, grinding process of economic indicators for the beneficiation great influence. Grinding system has a complex mechanism, strong coupling, the process, many factors, nonlinear, large delay and time-varying characteristics, so the effect of conventional control methods are not ideal. In this paper, the dynamic optimization using extreme optimization algorithm, to achieve reasonable control of the mill load, the mill operating at optimum load point, thereby improving mill efficiency, improve mill output.
Driver Voice Identification System Using Auto-Correlation Function and Average Magnitude Difference Function
Authors: Wu Jian Da , Liu Pang Yi , Hong Guan Long
Published: January 2014

This study presents a driver identification system using voice analysis for a vehicle security system. The structure of the proposed system has three parts. The first procedure is speech pre-processing, the second is feature extraction of sound signals, and the third is classification of driver voice. Initially, a database of sound signals for several drivers was established. The volume and zero-crossing rate (ZCR) of sound are used to detect the voice end-point in order to reduce data computation. Then the Auto-correlation Function (ACF) and Average Magnitude Difference Function (AMDF) methods are applied to retrieve the voice pitch features. Finally these features are used to identify the drivers by a General Regression Neural Network (GRNN). The experimental results show that the development of this voice identification system can use fewer feature vectors of pitch to obtain a good recognition rate.
Due Date Model Build and Analysis Based on Multi-Vendors
Authors: Yu Jian Jun , Zhu Qiang Qiang
Published: January 2014

The due date set is affected by the coordination and cooperation between enterprise and customers and due date requirement and sensitivity degreed of different types of customers are different. In order to analyze more complex situations, the problem and its model including two vendors, one manufacturers and consumers is studied in the paper. Firstly, the model is built and analyzed in view of the vendors, and the optimal due date is obtained after calculation. The analysis results show that there is not any relationship between the order function and the demand quantity, the demand quantity does not affect the order period. Secondly, the model is built and analyzed in view of the manufacturer, and the optimal due date is obtained after calculation, and the inventory cost coefficient is calculated. The analysis results show that the inventory cost arising from delay in delivery is actually proportional function about the overall demand for A. Finally, the model is built and analyzed in view of the coordination between the manufacturer and the vendors, and the optimal due date is obtained after calculation, and the maximum of whole supply chain profit is calculated. According to the benefit analysis, the whole profit is indeed bigger than separate operation.
Analysis of Shock Wave Signals and Calculation of Trajectory Vector in Acoustic Positioning System
Authors: Wu Song Lin , Wang Xiao Cheng
Published: January 2014

Based on aerodynamics, this paper discussed the shock wave traits of ultrasonic bullet and studied the methods to calculate the position coordinate and ballistic trajectory vector in free sound field. Through experiments, the signals of shock wave from firing point and ballistic trajectory were decomposed and reconstructed, making use of wavelets analysis. The characteristic parameters were extracted to position the sound source and orientate the trajectory, based on the sensors array of right tetrahedron.
The Data Link Layer Protocols for Underwater Acoustic Networks
Authors: Lv Zhong Zhi , Sun Gui Zhi , Qi Hong Yan
Published: January 2014

The efficiency of service of Underwater Acoustic Networks is restricted by the acoustic channel characteristic, such as the low bandwidth , high varying multipath and elevated noise levels. In addition, the lifetime of Underwater Acoustic Networks is influenced greatly by the limited battery power. This paper designs an Underwater Acoustic Networks and poses the data link layer protocols including the logical link control protocol and the media access control protocol. The simulation results have demonstrated that the protocols are of certain applicability in underwater acoustic channel environment that maximize throughput and reliability while minimizing end-to-end delay. In the event of low offered load, the protocol can satisfy the requirment of Underwater Acoustic Networks.
Managing Fragmented Database Replication for Mygrants Using Binary Vote Assignment on Cloud Quorum
Authors: Che Fauzi Ainul Azila , Noraziah A. , Mohd Wan Maseri Binti Wan , Amer A. , Herawan Tutut
Published: January 2014

Replication in distributed database is the process of copying and maintaining database objects in multiple databases that make up a distributed database system. In this paper, we will manage fragmented database replication and transaction management for Malaysian Greater Research Network (MyGRANTS) using a new proposed algorithm called Binary Vote Assignment on Cloud Quorum (BVACQ). This technique will combine replication and fragmentation. Fragmentation in distributed database is very useful in terms of usage, efficiency, parallelism and also for security. This strategy will partition the database into disjoint fragments. The result shows that managing replication and transaction through proposed BVACQ able to preserve data consistency. It also increases the degrees of parallelism. This is because by using fragmentation, replication and transaction can be divided into several subqueries that operate on the fragments.
Seismic Data Denoising Simulation Research Based on Wavelet Transform
Authors: Liu Shu Cong , Gao Er Gen , Xun Chen
Published: January 2014

The wavelet packet transform is a new time-frequency analysis method, and is superior to the traditional wavelet transform and Fourier transform, which can finely do time-frequency dividion on seismic data. A series of simulation experiments on analog seismic signals wavelet packet decomposition and reconstruction at different scales were done by combining different noisy seismic signals, in order to achieve noise removal at optimal wavelet decomposition scale. Simulation results and real data experiments showed that the wavelet packet transform method can effectively remove the noise in seismic signals and retain the valid signals, wavelet packet transform denoising is very effective.
Research and Application of Multi-Dimensional Model in 110 Incidents Data Warehouse
Authors: Jin Ze , Gao Li Jie , Xu Tong Ge , Wei Peng
Published: January 2014

This paper studied the multi-dimensional model and designed a 110 incidents data warehouse application system based on above mentioned model and Oracle database for further 110 incidents data analysis and mining. It provides a more flexible and efficient statistical analysis environment for decision-makers with timely and reliable reports. Firstly, we studied multi-dimensional model used to construct the 110 incidents data warehouse, and then detailed the design of fact table and dimension tables in star schema. Finally, we implemented the 110 incidents data warehouse analysis system which included the processing of slowly changing dimensions, data extraction, transformation, loading process and performance analysis.
Teleoperated Road Vehicles – The "Free Corridor" as a Safety Strategy Approach
Authors: Tang Tito , Vetter Pascal , Finkl Simon , Figel Korbinian , Lienkamp Markus
Published: January 2014

Research in the field of unmanned road vehicles, especially autonomous vehicles, has been increasing over the last decades. However, fully autonomous road vehicles are still far from being a reality, particularly in urban areas due to the fact that the machine is still not fully capable of correctly interpreting its environment. Therefore, teleoperated road vehicles present a transitional solution, where a human driver is brought back into the control loop, but without having to be physically present in the vehicle. The information between the vehicle and operator is transmitted through mobile networks. The connection cannot be guaranteed at all times and it cannot be predicted when a connection loss is going to happen. Therefore, an appropriate safety concept for a connection loss is required. This paper presents the safety concept named Free Corridor' as a solution to the problem. Here, the human decides which path the vehicle would follow in the case of a connection loss, thus avoiding the decision-making problem of autonomous vehicles. This paper shows the implementation of the concept Free Corridor and shows that it is a suitable concept for teleoperated road vehicles.
Study on Scheduling Method for Reentrant Autoclave Moulding Operation of Composite Materials
Authors: Ye Wen Hua , Li Jian , Chen Wei Fang , Ma Wan Tai , Leng Sheng
Published: January 2014

The autoclave moulding process of composites is characterized by reentrance, capacity and time constraints. Its scheduling directly affects productivity and production cycle of composites. Scheduling methods in the existing literature can't meet the requirements of its scheduling optimization. Aiming at improving utilization and reducing energy consumption of autoclave, based on the Theory of Constraints, a heuristic algorithm considering the capacity and time constraints is proposed to solve the scheduling problem, and priority scheduling rules are established. The studying of a case shows the effectiveness of the algorithm.
Heavy Metal Contents of some Wild Edible Mushrooms from Miyi, China
Authors: Zhang Ying , Yang Ge
Published: January 2014

Two heavy metals (nickel and cadmium ) in 15 specis of wild mushrooms were determined using flame atomic adsorption spectrometry (VARIAN, SpectrAA-220Fs). The mushrooms were collected from Miyi, China. The study explored the accumulation of heavy metals in different macrofung. It is found that the range of Nickel and Cadmium in mushrooms were 1.78-21.22 mg/kg and 0.47-21.84 mg/kg. Minimal and maximal concentrations of heavy metals were determined in Lentinus edodes and Boletus edulis for nickel, Russula alutacea and Russula delica for cadmium,respectively. The order of the levels of heavy metals in the mushrooms samples was found to be as Ni>Cd. Cadmium values in wild mushrooms collected from Miyi were generally higher than the previous studies. Nickel contents were in agreement with the literature value.
A Prototype of Preliminary Symptom Analysis and Follow-Up Systems for Systemic Lupus Erythematosus Patients
Authors: Surachat Komwit
Published: January 2014

Systemic Lupus Erythematosus (SLE) is a systemic autoimmune disease that affects any part of human systems. SLE most often harms the heart, joints, skin, lungs, blood vessels, liver, kidneys, and nervous system. Each SLE patient has a different set of symptom. Thus, SLE patients must be followed up closely by specialist. The treatments of this disease also base on the occurrence of symptom, doctor will check and consider carefully before taking any action to patient. Therefore, this research aims to develop a preliminary symptoms analysis and follow-up system for SLE patients for updating patient symptom to a doctor. The patient can report symptoms directly to the doctor without any necessity to see the doctor. On the other hand, the doctor can easily search and analyze patient data from the system instantly. Also, we propose a preliminary symptom analysis system in this paper. This system will analyze patient data by using a set of knowledge extracted from the doctor and specialist.
A New Kind of Beer Bottle Mouth Defect Recognition Method Based on Vision
Authors: Xie Yu Chan
Published: January 2014

According to the beer bottle mouth defect recognition problem on modern production line, a new recognition method based on the combination the Hough Transform and the Midpoint circle algorithm was put forward. Firstly, extract edge pixels on beer bottle mouth mage and transform them into Hough space, which was to draw circles at each pixel location with bottle mouth radius. According to the circular symmetry, only 1/8 circle pixels were needed to draw circles, which were worked out by the Midpoint Circle Algorithm. The circles there overlapped each other to vote. Secondly, took the position with the highest votes as the center of bottle mouth and determined the bottle circular area. Divided the area into regions. Finally, count out the number of image pixels in each region and recognition beer bottle defect. In this paper detailed implementation steps with detection results were given. Experiments and its analysis shows: the algorithm can recognition beer bottle mouth defect correctly and quickly.
Performance Evaluation of the Carbon Dioxide Corrosion Inhibitor IMC-1
Authors: Fan Zhen Zhong , An Hui Ming , Wang Shu Yi , Yang Jun Feng
Published: January 2014

The carbon dioxide corrosion inhibitor IMC-1 was composed by caprylic acid amide polyoxyethylene ethers (n=4-5) and a small amount of the TX-10(5%). When the concentration was 200 mg/L, N80 steel corrosion rate was less than 0.125mm/a. With the CO2partial pressure and temperature increased, N80 steel corrosion rate was decreased. From the electrochemical polarization curve, the adding corrosion inhibitor prevented the electrode reaction. The corrosion inhibitor IMC-1 was anodic inhibitor.
Research and Application of 3D Digital Detection Technology in Reverse Engineering
Authors: Wang Li Zhong , Zhang Dong Dong , Liang Jin , Liao Xiao Bo
Published: January 2014

In recent years, more and more class-A surfaces are adopted for product processing, both in the traditional industries and new industries, which proposes high requirements for the detection technique of product. This article describes the method of size detection in detail. Combining with the principle of reverse engineering, the XJTUOM and XJTUDP systems are used for the 3D digital measurement and design of the large sculpture. The digital detection technology combined with computer aided tools will have a more widespread and profound application in reverse engineering.
Testing Study on a Kind of Vehicle-Mounted Magnetorheological Retarder Testing Bed
Authors: Bao Yu , Wang Guo Tian , Zhao Hou Li
Published: January 2014

Automobile auxiliary brake, also known as retarder, is the key equipment to ensure the safety of automobile driving. Its operating quality which is guaranteed by a perfect test system and good test equipment has always been playing an important role. Studies on the test system of miniature vehicle-mounted retarder should be carried out, in order to make it easier to simulate its actual usage and environmental conditions, and also make it more authentic to reflect the properties of magnetorheological fluid retarder. In this way, the research and development level of magnetorheological retarder can be improved, the development cycle can be shortened which leads to the enhancement of brake technology; the test technique of the the magnetorheological retarder and the test level of test bed can also be improved which has a very vital significance to the research and the quality assurance of magnetorheological retarder products and the development of the vehicle braking performance.
Research on an Access Control Model for Radio and Television Monitoring Software Based on T-RBAC
Authors: Wang Zi Zhe , Tian Pei , Jin Xiang
Published: January 2014

With the rapid development of radio and television industry, the use of software to improve the security of broadcasting and TV system by monitoring the radio and television equipment is becoming widely adopted, So how to improve the authorization management model of software to meet the need of detailed sub-division of authority and dynamic authorization becomes the focus of the industry and has practical significance.
This paper first introduces the design concept, module composition of the radio and television integrated monitoring and management system (RTIMMS). In the second place, this paper reviews advantages and disadvantages of the most frequently used models including Role-Based Access Control (RBAC) and Task Based Access Control (TBAC). By researching and comparing two models above, the paper presents a mixed model called (T-RBAC) and divides tasks in two categories and related events respectively. The process of authority management is based upon the tasks, rules in rule base and usage count of permission. The diagram of T-RBAC authorization model is also introduced in the end.
Study on the Infrared Radiation Properties of Different Tourmaline Species
Authors: Lu Qi , Bai Feng , Wang Ni
Published: January 2014

Tourmaline is a kind of non-metal mineral, which has been applied widely in environmental protection, such as radiating infrared, producing ion negative and shielding electromagnetic radiation. It is proved that tourmaline has the properties of spontaneous electrode effect and weak magnetism. Tourmaline from different areas has some differences on internal crystal structure and chemical composition. This paper studied on the infrared radiation properties of four different kinds of tourmaline produced in Hebei Guangxi, Henan, Xinjiang. Our experiments indicated that different species of tourmaline has different rate of infrared radiation on the same condition, and infrared radiation rate changes with temperature and particle size.
The Comparison among Three Control Charts for Monitoring the Auto Correlated Processes
Authors: Yang Ming Jie , Zi Xue Min
Published: January 2014

We compare the ARL of three charts for monitoring the mean shifts of the first-order auto regressive model to choose a proper control chart. Simulation results show that the REWMA chart has a large superior to the EWMA and T2 the chart when -1<Ø<0, but when Ø>0, the chart is better than the other two charts.
The Research of Intrusion Detection Based on Intelligentization
Authors: Zhang Liang , Sun Hao Yue , Lv Guo , Sun Xiao Lu
Published: January 2014

In this paper, the intelligentized way is applied to detecting anomaly intrusion. Based on the global property of genetic algorithm and the locality of neural network, this method effectively improves the convergence speed of the network and the detection accuracy rate. It not only avoids the defect of the neural network, but also improves the precision.
Dynamic Tests of Energy Dissipation Structure with Unconsolidated Conical Bearings
Authors: Yang Qiao Rong , Zeng Ling Zhi , Guo Yan
Published: January 2014

In this paper, an unconsolidated conical bearing composed of PTFE and natural rubber is introduced. Experimental study on compressive property of unconsolidated conical bearings is conducted. Origin vertical stiffness and standard vertical stiffness of unconsolidated conical bearings are calculated. The sinusoidal shaking table tests study on a 5-story steel frame isolated structure with unconsolidated conical bearings containing polyurethane damping material or not are carried out. The results show that the unconsolidated conical bearing has good capacity of dissipating energy under pure compressive loading. The amplification coefficient of structural response with unconsolidated conical bearings containing polyurethane is approximately 1.3 and that without polyurethane is approximately 1.8. Energy dissipation structures with the new unconsolidated conical bearings in shock absorption are better than traditional structures.
Flotation Experimental Study of High-Sulfur Cu-Zn Ore in Yunnan
Authors: Zhang Zhi Guo , Liu Quan Jun , Ran Jin Cheng
Published: January 2014

The experimental ore belongs to high-sulfur Cu-Zn poly-metallic ore, the mineral composition of ore is complex, cupriferous pyrite most are disseminated. The Cu grade of raw ore is 0.76%, Zn grade is 1.48% and S about 25.02%. on the basis of best reagent system and control flotation time, the author did closed circuit process. the results of closed circuit process as follows: the copper concentrate grade is 20.35% and recovery rate is 86.081%; the zinc concentrate grade is 54.32% and recovery rate is 84.20%.
Biosensing Surfaces Based on Quantum Dots Array
Authors: Drbohlavová Jana , Chomoucka Jana , Hrdý Radim , Svatos Vojtech , Hubalek Jaromir
Published: January 2014

The fabrication of self-ordered semiconductor (TiO2) and noble metal (Au) QDs arrays was successfully achieved by advanced nonlithographic template based method, namely using nanoporous alumina template. The emphasis was placed on the successful preparation of QDs arrays with the desired size, homogeneous distribution and optical (especially fluorescence) properties. Titania and gold QDs characterization by SEM, EDX and fluorescence spectroscopy was performed in order to verify their surface topography, chemical composition and emission properties in UV/VIS range of spectra, respectively. The surface biofunctionalization of QDs was realized via simple physical adsorption of glutathione tripeptide, which makes these arrays suitable for potential biosensing application, mainly in optical and electrochemical detection of biomoleculesin vitro.
The Framework for Testing of Web Services through Actions in Addition to Scripts
Authors: Deeptha R. , Mukesh Rajeswari
Published: January 2014

.As Web Services draw modules within and across enterprises, dynamically and belligerently testing Web Services has become crucial. Comprehensive Functional, Concert, Interoperability and Susceptibility Testing form the Pillars of Web Services Testing. Only by adopting a comprehensive testing department, enterprises can safeguard that their Web Services is robust, scalable, interoperable, and secure. Overall functionality of web services would be informal towards test. But, only if we methodically trust the applications components (services) before we combine them to complete the application. In current scenario web service technology comprehends various testing apparatuses for manipulating and generating the test cases. But these tools and approaches were negotiating security and execution time and consume more resources. The existing methodologies will generate test cases for the low end web services and limited number of requests, due to these constraints we built new testing framework. In this paper we introduced the new basis with testing of actions, scripts and link for web services by the use of test cases. For this approach we used SOAP web services with SOA. The test case generation and testing reports will gives the accurate testing results and test cases. These test cases are generated using Java JUnit testing tool. We implemented our approach in a java based platform for efficient and secure manner.
APD-Based Detection Module of Single-Photons in Chemiluminescence Immunoassay System
Authors: Meng Hao , Guo Yang Kuan , Wen Chao
Published: January 2014

To accurately and rapidly detect single-photons is of the utmost importance for a Chemiluminescence Immunoassay (CLIA) system. An APD-based detection module of single-photons is designed in this paper. By comparison with PMT, APD possesses the advantages of higher detection sensitivity, lower dark current, smaller size, lower power consumption and higher integrity. The designed module can accurately detect single-photons with 22MHz frequency. The experimental results show that the module can be a basis for designing portable CLIA systems.
Research on Sitting Transformer Substations in Rural Areas Based on Improved Genetic Algorithm
Authors: Li Wei , Huang Yi , Wang Fang Min
Published: January 2014

The process of urbanization, Beijing faces a number of environmental problems. Especially in the last few years, there has been constantly sustained fog and haze, which makes the implementation of electric heating in rural areas gradually on the agenda. After the implementation of electric heating, the irrationality of the regional power grid layout will be further amplified. With the rapid growth of electricity load in the planning area, the requirement of the power supply grid reliability and power quality is also increasing. Therefore, on the basis of power load forecasting in consideration of the the electric heating, and based on the particularity of rural power network, we achieve the Huairou District substation site with the use of improved genetic algorithm. The results can provide reference for the selection of substation of the whole Beijing rural area.
Research on the Reliability of Distribution Network and its Influencing Factors
Authors: Yang Jian Lin , Ma Cong Gan , Lu Zhi Gang , Bai Yang
Published: January 2014

Distribution networks are directly connected to the users and the reliability of its power supply is able to reflect the structures and the operating conditions of the whole power system. In the analysis of distribution system reliability evaluation, it is unlikely to get the exact value of the model parameters and is necessary to consider the uncertainties. The network structure, the reliability parameters and load level and their effects on the reliability are studied in quantity and the results are proved in the case.
Bearing Test Research on the Cable Anchorage Zone of the Main Girder of the Xiamen-Zhangzhou Bridge
Authors: Zhang Fan , Zhou Jin Zhi , Xiong Jian Min , Dai Jie
Published: January 2014

This paper presents the static and bearing test research with adopting the full size model on the cable anchorage zone of the main girder of the Xiamen-Zhangzhou Bridge. According to test result. It verified correctness of its design and feasibility of its manufacturing techniques·
Evaluation on Filter Cleaning Performances Measured by VDI and JIS Testing Rigs for Cleanable Fabric Filter
Authors: Mao Ning , Chang De Qiang , Liu Jing Xian , Sun Xi
Published: January 2014

VDI type-1 rig and JIS rig are the two major testing rigs for cleanable fabric filters. We measured the filter cleaning performance using these rigs and the results were compared in order to characterize the two testing methods. It is found that filter cleaning has no direct relation with flow type of test rig. And configuration differences between VDI type-1 and JIS rigs causes the various differential pressure development curves in which VDI type-1 rig shows a little higher cake release effect than JIS rig. Moreover, a new concept of impulse per unit area is introduced for the evaluation on filter cleaning performance in a quantitative way.
The Settlement Computation of Composite Foundation of Different Typed-Pile Based on the Load Test
Authors: Yuan Man , Ding Ji Hui , Zhang Pan Xing , Quan Xiao Juan
Published: January 2014

The three kinds of the typical pile type are selected, which containing flexibility pile (e.g. rammed cement-soil pile is for short RCSP), rigid pile (e.g. cement-flyash-gravel pile is for short CFGP) and loose material pile (e.g. sand-gravel pile is for short SGP). The seven kinds of the composite foundation are designed, which are CFGP, CSP and GP composite foundation, CFG long pile and sand-gravel short pile (for short CFGLP-GSP), CFG long pile and CFG short pile (for short CFGLP-CFGSP), CFG long-short pile and rammed cement-soil short pile (for short CFGLP-RCSP) , and CFG core pile rammed cement-soil loop pile (for short CFGCP-RCSP) combined composite foundation. According to the load-settlement curves to determining the increment deformation modulus of the every load step, the layer-wise summation method to calculate the settlement of composite foundation is given, and the calculation results and the load-settlement curves are consistent.
Theoretical and Experimental Study on Crystal Detachment from a Chilling Surface with Vibration
Authors: Wang Wen Li , Xu Rui Zhao , Chang Xue Jun
Published: January 2014

A model of crystal detachment from a chilling solid surface with vibration has been presented according to the mechanical analysis of the primary phase of a growing crystal grain. The model indicates that the main factors of crystal detachment are vibration frequency and amplitude as well as cooling temperature of the chilling solid surface. The effects of the above three factors on the actual crystal detachment behaviors were studied experimentally by using a transparent NH4Cl-70%wtH2O alloy. The consistency between the experimental results and theoretical study proves the mechanical model.
Parameter Identification and Attitude Control of Ducted Fan UAVs
Authors: Nan Yi , Wang Chang Hong , Yi Guo Xing
Published: January 2014

For UAVs are favored by many countries, the reason is that they are not affected by man-induced factor. While the ducted fan UAV is a new type of UAV, rises in recent years, but it has become very hot in the field of the research and development of miniature unmanned aerial vehicle. This paper is based on the research of a kind of small ducted fan UAVs, and works on the system parameter identification of the UAV and the design of attitude controller.
An Optimized RFID Unidirectional Authentication Method
Authors: Guo Wen Zhuo
Published: January 2014

To solve the problems of consumers security and privacy, an optimized RFID unidirectional authentication method is proposed, comparing with other asymmetric cryptography, this method has stronger security, shorter key length, less computation and so on. This method achieves one-way authentication between tag and reader-writer, and allow the labels to automatically update the key to improve the performance of RFID authentication, and also can enhance security through updating keys. This method allows the label to update its own name and private key, so can prevent attackers tracking them, so as to solve the privacy problem of the tags.
Identification of Critical Factors to System Performance Using Availability Modeling and Simulation Analysis
Authors: bin Hussin Hilmi , Mokhtar Ainul Akmar , Muhammad Masdi
Published: January 2014

Availability analysis presents a means to understand the impact of existing maintenance system and maintenance resources to the overall system operational availability. The practical method for conducting availability analysis of a plant system at operation phase is illustrated and discussed via a case study of an acid gas removal system of gas processing plant. This study demonstrates that the availability modeling and simulation is effective in assessing the existing and future system configurations and determining possible impacts and critical factors to systems availability. These findings can significantly assist management to make right actions in improving plant system performances.
Preparation and Performance of Electrodeposited Cr-Pr Coating
Authors: Liu Xiao Zhen , Wang San San , Liu Xiao Zhou , Chen Jie , Li Xin , Yang Lei
Published: January 2014

Cr-Pr coating was prepared by electrodeposition method. The microhardness, wear weight loss and friction coefficient of Cr-Pr coating were studied respectively. The Cr-Pr coating were characterized with ICP-AES, EDAX, XRD and SEM techniques, respectively. The microhardness and the wear weight loss, friction coefficient of the Cr-Pr coatings are higher and lower respectively than that of the Cr coating. The microhardness of the Cr-Pr is as high as 805.2 HV, which is higher 3.74% than that of the Cr coating (776.2 HV). The wear weight loss of Cr-Pr is lower 1.33 times than that of Cr coating. The friction coefficient of Cr coating and Cr-Pr coating are 0.884 and 0.723 respectively. There are crystalline CrC in Cr-Pr coating. The nodules on Cr-Pr coating surface are smaller than that of Cr coating surface, and furrows and spalling are lower on the worn surface of Cr-Pr coating than that of the Cr coating.
The Anti-Corrosion Study on Zn-Al-Mg Coated Steel Sheets
Authors: Li Feng , Zhou Fang , Lv Jia Shun , Yang Hong Gang , Zhang Leng , Wang En Dong
Published: January 2014

Z11A3M, Z6A3M, Z1.6A1.6M, and Z1A1M coating samples were prepared in HDPS by traditional continuous hot dipping method. The anti-corrosion ability of these coatings was determined by SST, polarization curve and electrochemical impedance. The corrosion products were analyzed by XRD. The surface and section microstructures were observed by SEM. The results showed, the corrosion resistance of 4 kinds of Zn-Al-Mg coated steel is 4 times as galvanized steel. The Zn-Al-Mg coated steel sheets can be self-cured. MgZn2 and eutectic could be found in all ZAM coating. Zn/Al/Zn2Mg eutectic can be found in all 4 kind of coatings. The reason for superior corrosion resistance of Zn-Al-Mg coated steel is the decomposition reaction of Zn5(OH)8Cl2 which is retained by Mg. Thus the O2 diffusing rate is lowered down. Mg acts as PH buffer and the Zn dissolving rate can be reduced. According the results, the application of Zn-Al-Mg coated steel sheets is forecasted.
Study on Surface Modification of Mesporous Silica SBA-15
Authors: Wang Heng , Yu Chuan Bai , Wei Chun
Published: January 2014

In this paper, the mesoporous silica SBA-15 surface was modified by using silane coupling agent KH-540. In order to investigate the best modification conditions, effects of KH-540 dosage, reaction time and temperature were studied. The modified mesoporous silica SBA-15 was characterized by TGA, FTIR, XRD and N2 adsorption-desorption etc. The best modification conditions were obtained as follows: KH-540 dosage is 0.5g, reaction temperature is 90°C and reaction time is 4 hours. The results showed that KH-540 is successfully grafted on the surface of SBA-15, the SBA-15-KH540 possess a well ordered hexagonal mesoporous structure. Compared with pure SBA-15, the surface area, the pore size and the pore volume of the SBA-15-KH540 are decreased slightly.
A Material Selection Criterion for Hot-Stamping Dies
Authors: Ye Yong Sheng , Shan Zhong De , Wang Bao Yu , Jiang Chao , Zhuang Bai Liang
Published: January 2014

Hot-stamping technology applies hot-stamping dies to the forming and quenching of austenitized high-strength steel plates to produce super-high-strength parts. To carry out these forming and quenching functions, the hot-stamping dies must be able to withstand shock and high-temperature friction under harsh working conditions, and hence high-quality die materials are necessary. However, since the material performance requirements of hot-stamping dies have not been standardized, and special die materials have not been developed, the choice of materials is based on improving the safety coefficient, which leads to material waste and increased costs. In this article, the performance of the hot-stamping process is analyzed to obtain the main resistance indices and a material selection formula for hot-stamping dies, enabling the selection of hot-stamping die materials to be quantified, and thereby establishing a scientific basis for the selection process.
Analysis of Heat Pipe Filled with Several Oxide Nanofluids on the Start-Up Process
Authors: Gong Yu Ying , Liu Zong Ming , Zhao Wei Lin
Published: January 2014

Three heat pipes with nanofluids of Al2O3-water, CuO-water and SiO2-water were tested experimentally. The temperature distribution of their start-up process was analysed, and compared the heat pipe with water. The results showed that the start-up way of heat pipe filled with nanofluids was coincident, the heat pipe filled with nanofluids showed a lower start-up temperature and a shorter start-up time in evaporator section compared with heat pipe filled with water, the temperature drop between evaporator section and condenser section for the heat pipe filled with nanofluids were reduced by 2-5°C than that of the heat pipe filled with water. The effect of the length of the heating section of heat pipe filled with nanofluids on the start-up process was little.
Study on Microstructure Evolution during the Cold Roll-Beating of 40Cr
Authors: Cui F.K. , Yan G.P. , Liu H. , Wang X.Q. , Li Y.X.
Published: January 2014

For revealing the forming mechanism in micro level and for establishing the relationship between macroscopic deformation and microscopic changes, impact experiment of material property is conducted under the high speed cold roll-beating condition based on the plastic deformation mechanism of metal material, Based on the Zener-Hollomon constitutive relation, the macro change model is established, and the parameters of the 40 Cr are obtained according to the experimental data. Based on the model of microstructure evolution of dislocation density, the relation between macroscopic change and microscopic change is established, which provides the theoretical support for the forming process in micro level and revels the relationship between macro deformation and micro changes in the forming process of high speed cold roll-beating.
Nanostructured Surface Effect of Electrode on Doxorubicin Determination
Authors: Kynclová Hana , Přibyl Jakub , Hrdý Radim , Drbohlavová Jana , Prášek Jan , Hubálek Jaromír
Published: January 2014

In this study, we compared two types of nanostructured electrodes with gold nanocolumns and flat gold electrodes by measurements with doxorubicin. Nanostructured electrodes were fabricated by electrochemical anodic oxidation followed by deposition of gold to the porous alumina. Flat gold electrodes were fabricated by physical evaporation of gold layer to the silicon substrate. All electrodes were characterized by electrochemical impedance spectroscopy and then the electrochemical determination of doxorubicin was studied by differential pulse voltammetry. The impedance spectroscopy measurements proved a bigger electroactive area for nanostructured electrodes. The gold nanocolumns have been found as an important factor in increasing of electrodes active area. This fact is very important for sensors sensitivity. Fabricated electrodes were successfully used for determination of doxorubicin.
Investigation on TiCP/Al Composite Coating by TIG Cladding
Authors: Tang Wen Bo , Lu Cong Hui , Li Yan Peng
Published: January 2014

TiCp/Al composites coating was in-situ synthesized on the L1060 alloy surface by TIG cladding. The microstructure and the phase of the coating were analyzed by OM, SEM, ADS and XRD, and the properties was been tested by micro-hardnessmeter and wear testing machine. The results show that the composite coating has no porosity, inclusions and other defects. The microstructure of the composite coating mainly consists of TiC particle and aluminum. Microstructural evidence suggests that the formation of TiC occur not only by reaction between Ti dissolved in Al and Al4C3, but also by reaction between C dissolved in Al and Al3Ti. The hardness of the composite coating obtained by TIG cladding is up to 120HV0.2. The wear resistance of composite coating is 1.6 times more than that of the matrix.
Evaluation of Carbon Dioxide Corrosion on N80 Steel
Authors: Fan Zhen Zhong , Tong An Qi , Cui Yan , Yang Jun Feng
Published: January 2014

The carbon dioxide corrosion on N80 steel was evaluated under the gas phase and the liquid phase. With the test temperature improved, the corrosion rate increases. Under the condition of gas phase, the corrosion peak is 0.2942mm/a when the temperature is 110°C and pressure is 24 MPa. Under the condition of liquid phase, the corrosion peak is 26.5325mm/a when the temperature is 50°C and pressure is 24 MPa. With the increase of CO2 partial pressure, the corrosion rate of N80 steel was falling. Microscopic analysis shows that the corrosion products of CO2 on N80 steel have a large white flocculent compounds and the corrosion surface have a lot of cracks and holes.
Size Tunable near Infrared High-Quality PbS Quantum Dots
Authors: Kalasad M.N. , Rabinal M.K. , Mulimani B.G. , Greenham N.C.
Published: January 2014

Herein, we report the synthesis of PbS Quantum Dots (QDs) with oleic acid as surfactant molecules by non coordinating solvent route. The particles are having better size tunability by varying temperature and time of reaction. These quantum dots are characterized by optical absorption, photoluminescence and transmission electron microscopy. The resulting colloids are highly stable, extremely small size, spherical in shape, monodisperse and strong band emission. The estimated particles sizes are in the range of 2 to 6 nm. The present method of synthesis of PbS quantum dots can be used to fabricate low cost electronic devices.
Research of the True Flow with High Polymers as a Critical Process Parameter
Authors: Wang Xian Wei , Cheng Guang Liang
Published: January 2014

In this article should be noted that the accuracy of determining the viscosity of the flow is particularly low in the highly elastic with state of the polymer. It is therefore very important to identity the viscosity of the flow, which has great practical significance. solidity can be changed as a result of intermolecular interaction which can be observed in the process of polymer swelling, which means improving its chain flexibility and lowering the temperature of vitrifying. It should be noted that the processing of the experiment showed no pronounced dependence of the voltage, so it is under-read as the average results for all levers of the stress at a fixed temperature. Processed a method for determining the viscosity of polymer materials, which allows you to divide segmental strength and toughness of the true flow.
Study on Cutting Performance and Wear Mechanisms of Graded Ceramic Tool
Authors: Li Yan Zheng , Shan Zhong De , Zhao Jun , Xiong Jing Yun
Published: January 2014

In this paper, based on the experiments of high speed dry cutting nickel alloyed ductile iron with different nickel contents by graded ceramic tool, the cutting performance and wear mechanisms of graded ceramic tool were investigated. Results reveal that with the increase of cutting speed and nickel content the wear of graded ceramic tool is increased, wear mechanisms are transformated spalling and cohesive wear from abrasive wear, and chip shapes are turned into long arc segment from short segment.
Nanocrystalline Ni-30wt%Fe Supersaturated Solid Solution Synthesized by Mechanical Alloying
Authors: Chen Yu , Yu Yang , Zhan Wen Cong , Wang Er De
Published: January 2014

Ni-30wt%Fe elemental power mixture was mechanically milled under argon atmosphere for variuos times up to 25h.The evolution of Ni-Fe alloying during milling and the microstructure of the as-milled powders were characterized by XRD, EPMA (electron probe microanalysis), SEM and TEM, respectively. The results show that nanocrystalline Ni (Fe) supersaturated solid solution alloy powders with 30wt. % Fe in composition can be synthesized by mechanical milling of the elemental powder mixture. Both the content of Fe dissolved and the microstrain developed in the as-synthesized Ni (Fe) solid solution phase increase, while the crystallite size decreases, steadily with increasing milling time. In particular, the Ni-30wt%Fe alloy powders obtained by 25h milling consist of a single Ni (Fe) supersaturated solid solution phase with average crystallite size of about 15nm and accumulated microstrain as high as 1.12%. DSC tests show that the nanocrystalline Ni-30wt%Fe alloy powders have a lower melting temperature than the elemental powder mixture, attributed to the unique Ni (Fe) solid solution phase structure, the nanocrystallization, and the high strain energy.
The Analysis and Solutions of Floor Vibration for Light Bus
Authors: Teng Shi , Shi Wen Ku , Jun Ke , Zhang Yi Jing , Liu Tong Fu
Published: January 2014

Floor vibration model was established by FEM and the modal analysis was conducted, which were based on the condition that this experiment took the automobile floor as the research object and applied the basic theory of finite element analysis. Simultaneously the results of modal analysis were compared with the results of the experiment, verifying the accuracy of the model. This can be considered as a basis of providing reference for the optimization and improvement of light bus floor.
Experimental Study on Hydrodynamic Characteristics of Three-Stranded Polyethylene Rope
Authors: Huang Liu Yi , Zhang Lin , Dong Tian Wei , Wan Rong , Zhao Fen Fang , Liang Zhen Lin , Hu Fu Xiang , Bao Wei Guang
Published: January 2014

Three-stranded polyethylene ropes and twines are widely used as one of the main materials for fishery facilities. The shape and performance of the net fishing facilities in water are determined by the hydrodynamic properties of these ropes and twines. In the present work, experiment investigation was made in the flume tank in Tokyo University of Marine Science and Technology. Five kinds of three-stranded polyethylene rope with different sizes of diameter were tested. Drag and lift forces, together with sideways force acting on ropes under various trial conditions were measured by underwater load cells which were independently developed by the authors to record three axial force components. The drag, lift and sideways forces per unit rope length, under various attack angles at several flow velocities were obtained through data analysis. Then the drag coefficient, the lift coefficient and the sideways force coefficient were calculated within the range of Reynolds numberRd= 2.5×103~3.0×104. The following conclusions may be made from the experimental results: (1) At all the three testing attack angles i.e. 45o, 60o and 90o, the drag per unit rope length is proportional to the square of flow speed; (2) As the attack angle equal to 90o, the drag coefficient can be expressed in a power function of Reynolds number as given below: It can be inferred that the drag coefficient is approximately equal to 1.4 in the automatic model region, i.e. 1.2×104<Rd< 3.0×104. (3) As the attack angle equal to 45o or 60o, the lift force per unit rope length is proportional to the 2.5thpower of flow speed and the lift coefficient has a similar trend as the drag coefficient. But the lift coefficient makes smaller fluctuation compared to the drag coefficient when tending to a constant value in the automatic model region, i.e. 1.2×104<Rd<3.0×104.
Mathematical Modeling and Simulation Analysis of Lift for Car Hydraulic System
Authors: Gong Wen , Yu Zhong Jian
Published: January 2014

Based on the analysis of a typical elevator for car hydraulic system, a general modular simulation model is established. Through the case study of initial cavity volume and load change different effects on the dynamic performance of hydraulic system, the conclusion is found that the increase in initial cavity volume and load are conducive to reducing the hydraulic impact at the starting moment, but have an adverse effect on the dynamic performance at the stopping moment, and that the time to reach the steady state increases.
Research on the Distriution Rules and Calculation Method of the Parameters of Reservoir of Putaohua Groups in Yushulin Oil Field
Authors: Zeng Ke , Zhou Zheng , Zhang Mei Ling
Published: January 2014

Based on the Putaohua groups in Yushulin oil field, and through the statiscics and analyses, weve found that the reservoir property of this area is in the range of specially low permeability level. So due to the low porosity and permeability, its necessary to do some reaearch on the parameters calculation method.This papers analysed the relationships between the physical property parameters such as porosity, permeability, shale content and the well logging responses such as AC, SP, GR, then we built the distribution rules histograms of each physical property parameter. And we got the distribution situations of the parameters of the oil groups. Through the multiple regression, we built the relationship formulas between the reservoir property parameters and the well logging responses by using the core analysis data of 53 test wells. Afetr comparing the parameters of calculation and the core analysis data, we found that the deviation is small, which meets the production requires of oil field.
Improvements for a Hydraulic Excavator's Boom
Authors: Wu Sheng Bin , Liu Xiao Bao
Published: January 2014

Focus on stress concentration and high stress area, four improvements were put forward through analyzed a hydraulic excavator's boom with the finite element method under the bucket digging condition. Compared the stress distribution graph, the results show that these schemes can improve the stress concentration phenomenon and the high stress distribution areas. The practices demonstrated the effectiveness to reduce the invalidation rate of hydraulic excavator's boom.