bluuebunny/crossref_metadata_2025 huggingface dataset:
Robust Design to Control the Chaos of Fold Mechanism with Clearance
Authors: Yuan Ying Cai , Li Yan , Wang Yi Ming
Published: March 2013

With the increasing of web offset printing machines working speed, the nonlinear dynamics responses are more significant, even the fold mechanism with clearances appears some chaos phenomenon. Based on the dynamic model of fold mechanism, the nonlinear dynamics responses and the chaos movement in pair are studied. Used the performance parameters and dynamics response sensitivities as the goal values, the robust design model is established. By the robust design model, the nonlinear dynamic responses and chaos phenomenon can be under controlled in the same clearance degree. In this way, the performance of fold mechanism may be improved.
Model Analysis of Offset Cylinder Based on Finite Element Method
Authors: Zheng Xin
Published: March 2013

According to structural characteristics of blanket cylinder in the three-point suspended independent and dependent impression mechanism in offset, the 3D solid finite element model was established using ANSYS under hypothetical conditions by finite element model method. The intial five order model and the corresponding critical speed is gotten by the Block Lanczos characteristic value method. The calculation result shows that the maximum offset speed is less than first-order model critical speed, resonance can be avoided to meet printing quality requirements. The method is of highly significant in verifying reliability of blanket cylinder structure, forecasting response characteristic in certain circumstances in order to avoiding resonance and noise which cause mechanical defect.
Simulation of Flow Field and Calculation of Moment on Valve Plate for Butterfly Valve
Authors: Jin Xiao Hong , Shen Yang , Miao Qin Fen
Published: March 2013

In order to control the flow rate in a butterfly valve accurately, the moment, which acts on the rotation axis of valve plate, caused by flowing fluid must be considered. Taking air as the medium, the parameters of internal flow fields, such as the velocity and pressure, are simulated by CFD for a standard butterfly valve. The distribution of velocity and pressure fields that changes with various openings and a curve of aerodynamic moment are obtained. The results show that, as the opening of valve goes larger, the resultant moment on valve plate is monotonically increased. At the opening of 70°, the moment reaches its maximum. After the opening of 70° the moment begins monotonically decreasing and the resultant moment is close to zero at 90°.
K-Type, Inverse K-Type and X-Type Legs Stability Analysis of Jack-Up Offshore Platform
Authors: Tang Wen Xian , Cao Jun , Zhang Jian , Gao Chao
Published: March 2013

The force situation of truss legs has an important impact on the jack-up offshore platform. The finite element analysis on three types truss leg was made, and the stability of the three types truss leg under preload, operating and storm survival condition was discussed. The result showed that the maximum stress was in the chord; they met the design requirements; K type, inverse K type can save material, and they both met resonance requirements. The former had a better stability under preload condition, and the later had the best stability under operating, storm survival condition.
Coupled Thermoelastic Vibration of the Axially Moving Sandwich Beam
Authors: Wang Jin Mei , Li Ying Hui , Yang E Chuan
Published: March 2013

The transverse vibration characteristic of the viscoelastic sandwich beam with axial speed is studied under the coupled temperature field and displacement field. Based on the theory of Euler - Bernouli beam and the constitutive relation of Kelvin viscoelastic material model, the transverse vibration equation of the axially moving beam is established ; considering the interaction of the material deformation and the heat conduction, the coupled governing equation of the beam is obtained. and the coupled thermoelastic dynamics system are obtained by Galerkin method. The related thermal parameters on the vibration frequency are analyzed by using numerical method.
Effect of Packaging Material on the Non-Enzymatic Browning of Litchi Juice
Authors: Wu Min , Hu Zhuo Yan , Zheng Ping
Published: March 2013

A storage study of litchi juice packed in glass bottles and plastic pouches at 40°C to analyze effects of packaging material on ascorbic acid, browning and total phenol in litchi juice. The initial concentration of ascorbic acid in litchi juice was150.74mg/L and this was found to decrease by 30.56 and 26.12 mg/L after six weeks in glass bottles and plastic pouches. Dissolved oxygen concentration of litchi juice was decreased continuously in glass bottles and decreased fast first, then increased slowly in plastic pouches. Total phenol of litchi juice packed in glass bottles and plastic pouches decreased continuously. Litchi juice non-enzymatic browning attributed to ascorbic acid degradation, maillard reactions and polyphenol oxidation polymerization. The oxygen which permeated through plastic packaging material and dissolved in litchi juice promoted ascorbic acid degradation.
Statistical Optimization of Synthesis of β-Methylhydrogen Itaconate
Authors: Zhao Jing
Published: March 2013

β-Methylhydrogen itaconate was synthesized with itaconic acid and methyl alcohol and using benzoyl chloride as catalyst. The important variables (reaction temperature, reaction time and substrate mole ratio) were optimized by Box-Behnken central composite design under response surface methodology. The statistical analysis showed that the optimum reaction conditions (temperature 58.98 °C, time 0.5 h and substrate molar ratio 3.71) led to a maximum yield (99.2%).
Study on a Type of Low-Leakage Brush Seal Porous Media Model
Authors: Huang Shou Qing , Suo Shuang Fu , Du Kai Bing , Li Yong Jian , Wang Yu Ming
Published: March 2013

Computation Fluid Dynamics (CFD) has been employed to calculate the pressure, flow distributions and leakage of brush seal by using Reynolds-Averaged-Navier-Stokes (RANS) method and two-dimensional axisymmetric anisotropic porous medium model. The leakage in brush seal with radial clearance has a marked increase compared with contact brush seal. The leakages of brush seal with different radial clearances have been investigated comparing contact brush seal. A type ofretaining ring structure has been employedto reduce the leakage on radial clearance condition. Also the disturbance effect of retaining ring on bristle pack has been studied.
Research on Key Electromagnetic Model for Microwave Hot Recycling of Asphalt Mixtures
Authors: Sun Tong Sheng
Published: March 2013

For uneven temperature distribution of infrared hot recycling of asphalt mixtures, principle and advantage of microwave hot recycling are introduced. Maxwell's equations are applied to build electromagnetic transmission model of recycled asphalt mixtures. Considering asphalt mixtures as dielectric substance, reflection and refraction of electromagnetic field are researched and model of standing wave ratio is built. Equation of magnetic attenuation is applied to contrast attenuation depths of different pavement materials. The results lay a good theoretical foundation to improve heating efficiency and choose pavement materials.
UV Ink Photoinitiators Migration to Food Simulants Behavior Using Spectroscopy
Authors: Chen Ting , Li Wei , Zhou Xian Wen
Published: March 2013

The migration behavior of UV ink photoinitiators from the substance of the food packaging to the food is simulated by photoinitiator spectrometry analysis. The different food simulants 10% ethanol, 95% ethanol and 97% isooctane migration behavior of the photoinitiators 1-Hydroxycyclohexyl phenyl ketone (184) are simulated on the polyethylene (PE) coated paper 4018,4025 and 4918 PE coated layer at different temperatures of 30°C, 45°C and 60°C. The qualitative and quantitative analysis is done using infrared spectroscopy and ultraviolet spectrophotometry. It is discussed that the effect of the temperature, swelling, PE lamination layer thickness as well as the paper thickness of pollutants by the different thickness of the polymer coating on the migration to food simulants.
Safety and Evaluation of the Nano-Materials
Authors: Qi Lei Lei
Published: March 2013

Although the research on the safety of the nanomaterials has made some progress, there are still some problems, such as: lacking the knowledge of the entire life cycle of nanomaterials----the production, the application and the transformation; more research on the safety of the nanomaterials which enter the body through inhalation, but less on other approaches; the lack of ideal reference materials; a shortage of appropriate toxicological endpoints in vitro experiments and standards to determine the dose. This paper mainly analyzes the security and evaluation of nanomaterials.
Experimental Study of Magnetic Field Variation Induced in Ferromagnetic Materials
Authors: Yong Yang , Sun Dong , Ji Jie
Published: March 2013

The fatigue tests on 15CrMo steel specimen were carried out and the metal magnetic memory (MMM) signals were detected. The experiment shows that the magnetic signals of specimen contain the information of stress distribution in the material inside. Furthermore, the experimental results show that the magnetic signals increase initial while then decrease slightly with the stress increase from 0kN to 200kN. Though analysis the MMM signals induced by different tensile stress within the plastic region of the specimen, a simple model was derived. The experimental results are consistent with the calculated results based on the Jiles-Atherton model.
Finite Element Simulation of Enhanced Cooling Cutting of Stainless Steel
Authors: Su Yu
Published: March 2013

This paper develops a 2D finite element model for the enhanced cooling cutting of stainless steel. The enhanced cooling effect is modeled with a convective heat transfer coefficient assigned to a heat transfer window of cutting zone. Five convective heat transfer coefficients are defined to simulate different enhanced cooling effects. The simulation results suggest that increase of convective heat transfer coefficient results in a very small reduction of maximum tool-chip interface temperature, even when a very large convective heat transfer coefficient is used. In addition, no significant effect on cutting force and thrust force is observed with the increase of convective heat transfer coefficient.
Study on Cold Expansion Process of High Pressure Components
Authors: Zhang Shi Jin , Wang Yan Li , Yang Feng Ling
Published: March 2013

In high pressure water jet field, most components worked under very high fluctuated pressure. The high and fluctuated pressure would fail those components quickly, which leads to very short period of fatigue life for high pressure components. Cold expansion process could improve components fatigue properties greatly. This has been known for a while. By applying this process in high pressure field, much longer service time is expected. This paper investigated the cold expansion process experimentally. Based on micro-structure investigation, the strengthening mechanism has been explored.
Research on Wildcard Character of Appoximate Matching in Manufacturing Engineering
Authors: Wu Xi Hong
Published: March 2013

The paper first analysiss the types and methods of the wildcard characters, then discuss the matching in manufacturing engineering problems which it exists in the pattern matching. According to the problems, it puts forward algorithm to realize approximate matching. At last, it provides the flow charts and examples of the algorithm. From the example of experimental result, exact machining can be realized approximate matching through the wildcard characters. So various matching algorithm can be extended and used more.
Design of Tropical Fruit Quality Safety Traceability System Based on 2-Dimensional Bar Code in Manufacturing Environment
Authors: Sun Ji Hua , Meng Meng
Published: March 2013

In order to realize the tropical fruit quality safety traceability, the paper proposes that using two-dimensional bar code (QR Code) technology constructs the tropical fruit quality safety traceability system. On the basis of the study of the two-dimensional bar code (QR Code) technology in Manufacturing Environment, author analyzes the elements involved of tropical fruit production and circulation, uses HACCP, FMECA and other technical methods, puts forward the key elements of the quality and safety of tropical fruit, uses country and industry relevant coding standard, and constructs tropical fruit quality safety traceability system based on two dimensional bar code (QR Code). Application shows that the tropical fruit companies or production bases by using the system improve the tropical fruit production safety management level, realize the tropical fruit quality safety traceability, promote tropical fruit industrialization and standardization management.
Experimental Research on Air Cushion Lamination Process
Authors: Gao Bo , Cai Ji Fei , Zhang Xiao Gui
Published: March 2013

The application of air cushion in lamination process in the printing and packaging field is still a new attempt. In order to further understand the effect of air cushion lamination process in practical application, an experimental research is made on air cushion lamination. The air pressure distribution simulation results are verified using experimental device, and the pressure, thickness and lamination time of air cushion are varied. In addition, a process test is made over the adhesion of the corrugated core paper and surface paper using orthogonal experiment. The results show that the air cushion lamination process is feasible for lamination and the simulated air-cushion pressure distribution is consistent with the measured results. In this experiment 1000 pa air-cushion pressure, 2 mm air cushion thickness, 3 min lamination time, selected as the process parameters for the adhesion of corrugated paper, are appropriate.
Development of Modularized Inline Coating System of Multi-Color Offset Printing Press
Authors: Zhao Ji Bin , Tong Cheng Nan , Wang Zhao Hua , Wu Fan
Published: March 2013

A new type of inline coating system is designed and developed. The coating system can be mounted into printing press instead of blanket cleaner. An anilox roller and a sealed duct on the glazing oil transferring part for supplying and transferring the coating oil are introduced. A set of pressure adjusting mechanism is designed for changing the pressure between anilox roller and blanket cylinder, while a set of on-off impression mechanism is arranged to change the position of anilox roller and the on-off impression state. The press can print as normal when the coating system is dismounted. With this coating system, the press can coat prints with glazing oil. This system can be mounted in various type of printing machine. One new type of glazing technology named reverse coating can be achieved when it is mounted in multicolor press.
Design of Drop Test Machine for Transport Package
Authors: Yuan Yan , Cao Yan Yun
Published: March 2013

In order to imitate the motion of a free failing package, one kind of drop test machine for transport package is designed. This paper analyzes the problems of existing drop test machines, conducts machine and electric control design, illustrates the structure, operating principles and methods, and then improves the appearance of the machine. As is shown by the experiment results, the drop test machine for transport package enjoys the advantages of low cost, simple structure, ease of processing and high security. It can satisfy the actual demands of packaging enterprises and institutions of scientific research and has high value of engineering application in packaging equipment.
Study on Storage of Gradient Temperature Cold Store
Authors: Yu Jin Ze , Li Zhen Liang
Published: March 2013

Design of a kind of fruits and vegetables temperature gradient storage, which is characterized in that: the subsidiary structure, composed of the static pressure chamber, buffer room and gradient storage. Through experimental measurements, the temperature distribution in the temperature gradient storage between the deviation in ± 0.5oC, relative humidity were kept at 60%~70% to that without, but relative humidity of the humidification treatment were 85%. The storage experiment results show that, compared with the blank control, humidification treatment can significantly reduce the water loss rate of fruit and vegetable.
HIRFL-CSR Water Leakage Detection System Design and Research
Authors: Li Yun Jie , Wang Yan Yu , Zhou De Tai , Yin Jia , Zhou Wen Xiong , Li Li Li , Lin Fu Yuan , Ma Xiao Li
Published: March 2013

HIRFL system is the most advanced Heavy Ion Research Facility in world; to protect its safe operation is the major responsibility of the Institute of Modern Physics, Chinese Academy of Sciences. To process the situation of possible water leakage during the operation of equipments, we developed a water leakage detection system. The system can precisely detect the specific location of water leakage, and visually display on the computer in the control room remotely. The paper describes the theoretical design and practical, and assesses the effect of the field running. It has been successful early warning repeatedly water leaking avoid accidents, ensure the normal operation of the machine, since the system established in 2010.
Double-Position Positioning Test and Analysis on Holographic / Protruding Lettering of Cigarette Packet Based on Machine Vision
Authors: Xing Jie Fang , Chen Yuan , He Lu Jun
Published: March 2013

In order to improve production quality and efficiency of cigarette trademark, new type reel cigarette trademark on soft package adopts production mode of reel to reel, which becomes the development trend. This technique makes higher requirements on double-position connection lettering and detection technology of holographic / concave and protruding lettering. This experiment uses on-line quality examination system to conduct the relevant examinations on double-position lettering of holographic / protruding lettering of cigarette packet and makes the analysis. The experiment shows that: holographic lettering quality varies with the amount of lettering and lettering speed. For protruding lettering unit, electrified aluminium in vertical direction has a better result than that in horizontal direction. This study lays a foundation for normal production of machine and further quality inspection after lettering.
Research on Fault Diagnosis Strategy of Belt Conveyor
Authors: Hu Wei , Li Ou
Published: March 2013

In view of the inadequacy of the fault diagnosis of the belt conveyor, the paper takes advantage of the application of fuzzy information fusion technology to fault diagnosis, based on the fuzzy set theory, a fault diagnosis method based on Multi-sensor fuzzy information fusion is developed. The obtain information of many sensors will fuzzy, again its fusion based on the synthetic operation and decision-making rules of the fusion center, in order to gain the accurate state estimation and judgment of belt conveyor. The experimental result indicates that the credibility of diagnosis is improved markedly and the uncertainty is reduced significantly after the multi-sensor fuzzy information fusion, the accurate diagnosis to belt conveyor is realized.
Valve Leakage Simulation and Fault Diagnosis of Diesel Engine
Authors: Li Shen , Guo Li Hua , Wang Dan Hua , Yuan Hui Qun
Published: March 2013

To valve leakage in working process of diesel engine, the corresponding fault simulation is an important measure for finding a diagnostic method. By the Law of Conversation of Energy, Conversation of Mass and the Classical Equations, mathematical model of working cycle of diesel engine is reasonably built and calculated. Through analyzing valve leakage fault, the single Weber-function is used as a combustion model in fault simulation. Fault diagnosing of valve via the energy parameters of cylinder head vibration signal is proposed. The key to diagnose valve leakage closely lies in analyzing its high frequency components through selecting the cylinder head vibration signal close to the maximum burning and exploding pressure step and proposing spectrum analysis.
Concentration Measuring Method in PM2.5 Monitoring Scheme
Authors: Li Da Nian
Published: March 2013

PM2.5 is a scientific index used for measuring air pollution degree. WHO proposes PM2.5 less than 10 is safe. However, PM2.5 in many areas of China is higher than 50 and even close to 80, which is much higher than that in Sahara Desert. From the perspective of environmental protection and human's physical health, it is necessary for governmental departments to organize environmental monitoring stations for carrying out PM2.5 concentrations monitoring, using the annual concentration of 35 micrograms/m3 as standard and knowing well the dynamics of PM2.5 concentration with all sorts of flexible monitoring methods. Therefore, concerning about these, a study is made in this paper.
Design of the Temperature Control System for Tobacco Leaf Redrying
Authors: Liao Yu Mei
Published: March 2013

The development of intelligent control system based on environmental parameters tobacco redrying. The use of the FNN neural network to determine the temperature and humidity of the air conditioning units running time, on this basis, the paper presents an improved network of four framework structure. The model has a simple calculation; each layer of the network the derivation are obvious physical meaning, stability control safety and energy conservation in the actual operation.
Research on CNC Milling Based on Subprograms
Authors: Chen Xiao Hong , Chen Jian Jun , Yan Bi Cheng
Published: March 2013

Research the subprogram characteristics, combined with the actual production, introduce the subprogram application systematically, Illustrate flat milling, layer cutting, removal of residual material, realization of rough and finish processing, optimization of parts program, processing the same profiles and the same parts, etc., elucidate the method and technique of subprogramming, show the incremental programming of rotate instructions.
Analysis of Machining Error in Numerical Control Milling
Authors: Cui Jing Jun
Published: March 2013

Generally speaking, the error in machining is an important indicator measuring the accuracy of finished surface. The machining error often occurs in numerical control milling. Such error will be influenced by multiple factors, such as cutter wear, thermal deformation, machine tool deformation, vibration or positioning error. Nowadays, though our science and technology develops rapidly, machining error problem in numerical control milling occurs frequently. At present, several methods can be applied to forecast machining error problems in numerical control milling, including on the basis of machining theory, experimental study, design study and artificial intelligence. The analysis and forecast of machining error problems in numerical control milling can to some extent improve the degree of machining errors so as to promote the machining accuracy in milling. The author expresses the views on machining error problems according to current situations of numerical control milling.
Research and Designed of Home Gateway Based on ZigBee Technology in Manufacturing Engineering
Authors: Zhu Lin , Zhang Lin , Cui Xing Chen
Published: March 2013

Considering environmental monitoring with the characters of disperses, inconstancy and multiplicity, the design of wireless sensor network k node based on Zig Bee CC2430 is proposed. Smart sensor network based on zigbee has obvious advantages. Zig bee network supports large capacity, low_power consumption, easy to expand and the self-_organizing network. It has designed the hardware and software structure according to the technical requirement of environmental monitoring system. The results of test indicate that net work nodes have good stability as well as communication efficiency, thus satisfying with the request of wireless communication network transmission and network topology in environmental monitoring. And this design has good promotional value.
The Design of Two Pendulums Spherical Robot
Authors: Ma Shao Jun
Published: March 2013

A spherical robot driven by two pendulums is designed, which is actuated by both the eccentric force and the inertial force generated by the inner drive unit when the robot is in motion. This improved drive manner improve the eccentric mass ratio greater than the robot total mass, can provide more eccentric moment and the moment of inertia, so that the robot has a higher speed of movement, Through the analysis of movement principle and design to complete the structural model and the main components of the spherical robot design.
Design of Sustainable Energy Supply for Mechanical Exoskeleton Based on Fuel Cell
Authors: Ma Shao Jun
Published: March 2013

In this article, it takes the small power mechanical exoskeleton with fuel cells as the main application target. Based on different two hydrogen supply methods, high-pressure hydrogen cylinders and portable metal hydride hydrogen cylinders, the box structure and shape design of small power PEMFC is made. It cannot only provide power as a independent component using high-pressure hydrogen cylinders supply gas equipment, but also as transportation power or portable equipment by installing rapidly metal hydride hydrogen storage cylinders, which realized the use of reliability, flexibility and convenience for mechanical exoskeleton.
Design of Carbon Monoxide Monitor System Based on Lonworks Technology
Authors: Zha An Xia
Published: March 2013

Focused on the Lon works front-end intelligent monitoring and control network node software, hardware, and design and develop a system solutions for indoor hazardous gases CO data acquisition monitoring and alarm functions. On this basis, Brief introduction to the Field Bus Lon works control network technology and reality of remote monitoring system on the basis of integrated control network and information network, and analysis structural characteristics of distributed intelligent monitoring network system, with certain promotional value.
Research and Implementation of Improved Real-Time Crawler Modeling
Authors: Zuo Xiang Lin , Wang Wen Bo , Wang Ying , Zuo Wan Li
Published: March 2013

The past decade has witnessed the rapid development of search engines, which has become an indispensable part of everyday life. However, people are no longer satisfied with accessing to ordinary information, and they may instead pay more attention to fresh information. This demand poses challenges to traditional search engines, which concern more about relevance and importance of web pages. A search engine compresses three modules: crawler, indexer and searcher. Changes are needed for all these three parts to improve search engine's freshness. This paper investigates the first part of search engine crawler, we analyze the requirements for real-time crawler, and propose a novel real-time crawler based on more accurate estimation of refresh time. Experimental results demonstrate that the proposed real-time crawler can help search engine improve its freshness.
An Intelligent Modeling Method for Welding Deviation of Rotating Arc NGW
Authors: Li Wen Hang , Li Qiang , Yang Feng , Sun Dan Dan , Wang Jia You
Published: March 2013

For welding seam tracking of multi-layer single pass welding by narrow gap rotating arc gas metal arc welding (GTAW), an intelligent modeling method based on rough sets (RS) theory for welding deviation was put forward. First, work piece was designed and processed to mimic multi-layer single pass welding groove, and enough experimental data were acquired under different deviations. Second, the input of the model was selected and processed to build decision table. Then after discretization and reduction for decision table, the knowledge model in "IF...THEN" form was obtained. At last the model was validated and compared with BP net model. It showed that the both models had similar predictive capability, and RS model precise could meet actual needs. Further more, RS model had better comprehensibility, and was useful to find potential laws between seam deviations and welding electrical signals from experimental data. The research was helpful for further controller design.
Research on the New Rural Green Building Design
Authors: Dong Jing
Published: March 2013

Since it proposed the building of a new socialist countryside by the "Eleventh Five-Year", the new rural green building design and research has been the problem construction industry discusses and faces. Based on this, this paper takes the theme of "new rural green building design research. It firstly takes an overview about green building of a new socialist countryside design; secondly to explore the rural architectural design and research status; once again raised a few simple and obvious opinion on the strengthening of the new the rural Green Building Design research; final summary of the full text. The goal is to exchange ideas with their peers, and promote the upgrading of China's new rural green building design at the same time to speed up the building of a new socialist countryside, so as to promote the sustainability of the development of China's construction industry.
Research on the Application of VR in the Model of Grading and Evaluating of Farmland Based on GIS
Authors: Sun Qing Juan , Zhou Jian Zheng
Published: March 2013

Virtual Reality (VR) is to immerse interactivity and imagination as the essential features of the advanced computer interface. The grading and evaluation work of agricultural land involves a large number of processing, statistics, analysis and calculation of spatial and attribute data, and it is a good idea to adopt the most advanced computer technologyGIS technology and database technology to eatablish the model of the farmland scientific and reasonable grading and evaluating . The model includes the module for land requisitionthe module for land requisitionthe module for land classification and modulefor the benchmark land price evaluation module.
Research on Urban Green Roof Technology
Authors: Wang Yang , Chen Yan
Published: March 2013

For the deteriorating urban ecological environment, the green roofs, as an important component of the urban landscape, play a positive and important role on constructing harmonious and natural urban environment. This article is focused on the analyses of the technical characteristics of green roof system and its structure, and also on the demonstration of the important effects of green roofs in areas such as energy-saving, emission reduction and eco-environment.
Laboratory Simulation Study of Photo-Degradation Process of Fenvalerate in Aqueous Solution
Authors: Liang Yan Ru , Wen Yu Yun , Hong Xiao Yan , Gong Zhen Bin , Li Wen Quan
Published: March 2013

A laboratory-made the efficient photochemical degradation experimental device, combined with high performance liquid chromatography-tandem diode array detector device (DAD), fluorescence detector (FLD), mass spectrometer detector (MS), research fenvalerate its photo degradation. The structure of the spectral characteristics is the product, photo degradation reaction kinetics of degradation products, suggesting fenvalerate light chemical degradation process in an aqueous solution. The spectral characteristics of fenvalerate under ultraviolet light can be degraded into smaller organic molecules; maternal and main product have strong UV - visible absorption, fenvalerate are weakly fluorescent substance in the aqueous solution. The major products are strong fluorescent substance. Almost no effect The photo degradation kinetic data show fenvalerate photo degradation in an aqueous solution to approximate a reaction of the reaction; pesticide initial concentration, the pH value of the aqueous solution of pesticides photo degradation reaction rate; To accelerate the increase of salinity, light intensity fenvalerate in aqueous photo degradation reaction rate; significant influence of small organic molecules, with the type of small organic molecules.
Study on Simulation of the Engine Assembly System
Authors: Chai Shu Feng , Luo Su Jun , Zhang Xue Ling
Published: March 2013

Building the model of assembly system in virtual environment, analyzing and evaluating assembly system performance by use of system simulating technology, can optimize parameter and configuration of assembly system ahead of production plan in order to optimize production process and improve production efficiency. An example is given to illustrate the process of modeling and simulating the engine assembly system based on the FactoryPrograms software.
Research on Green Technology System of Oriented LCA Electromechanical Products
Authors: Yuan Cheng You , Yang Yu Xia , Chen Liu Liang
Published: March 2013

In view of the current LCA software, electromechanical products green design and green technology system are lacks of good support issues. From the electromechanical product manufacturing, processs technology characteristics, process parameters and green characteristic starting, to establish the overall technology system flow, system structure and system function model, and then from the view of electromechanical product life cycle green information integration, to analyze product BOM structure and green information integration strategy. According to the relationship between machining process parameters and process output indicators factors, to set up electromechanical products process parameter model and the quantification method under LCA, using GBP algorithm selects optimization program, to achieve green manufacturing process. From the point of integration in-depth analysis, the analysis of the relationship between system functions and multiple targets of process parameters, and further development of a prototype system.
Study on Collecting and Reusing Collaborative Contexts for Cross-Culture Communication in Engineering
Authors: Liu Zi
Published: March 2013

A logically implementing architecture, which depends on a semi-structured model to represent project-driven collaborative contexts for cross-culture communication in engineering, is put forward in this paper. Main enabling techniques such as modeling the collaborative process chain, classifying the collaborative contexts, configuring the blog-like templates, and developing the searching algorithm, are discussed in detail. To verify the feasibility, a simple scenario is given.
Research on Multi-Level Fuzzy Evaluation for Safety of Floating Bridge in Complicated Engineering Environment
Authors: Zhou Yin Zhi , Wang Jian Ping
Published: March 2013

In this paper, according to the characteristics such as great traffic throat role, obvious target and easy-to-expose, and poor protection ability of the floating bridges established in wartime and on the basis of comprehensively analyzing all risk factors affecting the floating bridges, a floating-bridge safety evaluation indexes system and a grey matter-element evaluation model 41 specific factors in the complex environment containing are established using enemy's threat, commanding decision, river environment, personnel's operation, equipment's quality, load passing and other risk factors encountered by the floating bridges as the primary indexes. Then, a safety evaluation is made in combination with a floating bridge setting-up case, thus drawing up a conclusion that the safety of this floating bridge is in a moderate state. Meanwhile, the main factors affecting the safety of the floating bridges are determined, thus providing certain references for the safety evaluation of other engineering.
The Impact of the New Material and Technology on Modern Architectural Design and the Role of Promotion
Authors: Zhang Yu Liang , Sun Quan
Published: March 2013

building materials are the carriers of building; it has both functions with use and performance. The implementation of the architectural form can not be separated from building materials; building materials also get value of existence because of attaching building. In today's technological conditions, a variety of building materials, with each passing day, new building materials and new processing and construction techniques continue to emerge, to the architect's design provides a lot of choice, to the architect's space performance provides greater possibilities sex. All this convenience is a new character; prompting some architects to promote the generation of new design style, tactics and thinking, there are a large number of rich architectural forms of the characteristics of the times.
Profit Optimization of Steel Shot Blasting Processes
Authors: Pi Vu Ngoc , Thai Pham Hong , Hung Tran Quoc
Published: March 2013

This paper presents a study on profit optimization of steel shot blasting systems. In the study, the influences of blasting process parameters including air pressure, nozzle diameter, cost components as well as the effect of the nozzle wear on the profit of a cleaning process were investigated. Based on the results of the optimization problem, a regression model for calculation of the optimum exchanged nozzle diameter in order to get the maximum profit rate was proposed. By using the model, both the profit and the blasting time can be reduced considerably.
SIPM: Stock Index Prediction Model for Engineering Management
Authors: Chen Yi Ying , Shuo Liang Xun , Zhang Ze Xing
Published: March 2013

In order to accurately predict the future trend of the stock index, a stock index prediction model (SIPM) is provided. SIPM composed by the following modules: data acquisition module, data preprocessing module, learning modules and forecasting modules. The core of SIPM is the last module which adopts ANN as its predicting model. Based on the historical data of a past period, SIPM can forecast next M days trends. The experiments on daily, weekly and monthly data show that the model is feasible. The key conclusion is that SIPM has good prediction results on low-level time granularity.
Effect of Prandtl Number in Turbulent Buoyant Jet Simulation
Authors: Wang Shao Bo , Fang Shen Guang , Cui Li Qin
Published: March 2013

Turbulent Prandtl number used in numerical simulation has effect on exact prediction of velocity and heat transferring with two dimensional buoyant mathematical models. Various Prandtl number values advised by experiments are used to study its effect on numerical results approaching to real ones with model under axisymmetric coordinate. It shows that axial velocities can’t be affected by using various values of of Prandtl number in numerical simulations and can be predicted well. However, it affects the exact prediction of axial concentration to extent, and a smaller value of Prandtl number tends to forecast a smaller axial concentration than real one, and vice versa. A reasonable range of turbulent Prandtl number for various Reynold numbers was suggested.
Experimental Research on an Antipodal Vivaldi Antenna with Wide Band
Authors: Jiang Ming , Song Li Zhong , Tong Xin , Fang Liang
Published: March 2013

The Vivaldi antenna is a kind of wide band antenna, which is widely used in many wide band electronic systems. This paper designed and fabricated a specific antipodal Vivaldi antenna (AVA) for practical application. The operating frequency range of fabricated AVA is from 2 GHz to 11GHz. The length and width of the fabricated AVA are 92.7millimeter and 110.4millimeter, respectively. A practical AVA was fabricated according to simulation parameters. The experimental results of the AVA are provided and analyzed. For the fabricated AVA, the measured average voltage standing wave ratio (VSWR) is 2 and gains are higher than 0 dB within the operating frequency range. Meanwhile, the wide beam performances are also observed. The experimental research on the AVA can be as a technical reference for the design and implementation of other Vivaldi antennas.
A Method of Receiver Circuit in High-Duplicate Pulse Lased Range Finding’s Design and Analysis
Authors: Le Zhang , An Zhi Yong , Hao Yong Ping , Dai Qin , Li Ye Qiu
Published: March 2013

In this paper, the two main reasons are introduced such as great varying range of echo signal power and pulse signal error, which affect the pulse laser ranging accuracy and analyzed on the base of the pulsed laser range finding method. For them, the methods are provided that the AGC technology in the receiving circuit is adopt to extend the dynamic range of the receiver, and gain the high precision receiving pulse signal by using high-speed voltage comparator. Then the problems of great varying range of echo signals caused by different measuring distance and contacting the timing circuit are resolved efficiently.
Multi-Resolution Wavelet in Discontinuous Coating Thickness Measurement
Authors: Xu An Cheng , Zhu Xi Fang , Chen Gong
Published: March 2013

For building discontinuous dynamic scanning of film thickness of lithium battery systems, dynamic scanning of laser sensors is realized based on threshold judgment and multi-resolution wavelet algorithm for dynamic noise reduction. Through the analysis of scanning the system inherent frequency, vibration frequency and threshold in various scanning mode measurement results, indicate that upper and lower threshold in 160-210 ms can reach better accuracy. The results show that dynamic scanning detection accuracy (MSE) reaches 2-3μm, compared with the traditional time domain, frequency domain and unique multi-scale wavelet de-noising, the method applies to different lengths and discontinuous of coating thickness measurement.
Design of Automatic Transplantor for Flower Seedling
Authors: Feng Qing Chun , Wang Xiu
Published: March 2013

In order to improve the flower-seedling transplanting from trays to pots, an automatic transplantor was designed, the key components of which included the grasper, transit unit and the controller. The grasper for holding the seedling root, was optimized based on the analysis for the grasp force, and it was adaptive for trays of varied size and non-destructive for the seedling. The belt-gear unit was adopted to drive efficient seedling transit, besides the multi-motor control system was built. Finally, the test for the grasper and the control system showed that the control system worked well when 600-1000 cycles per hour were finished, and the grasper performed perfectly when the less than 800 seedlings per hour were transplanted.
Mathematical Modeling and Structure Optimization of Cupped Wave Gyro
Authors: Yi Tao , Cheng Zhi Yong , Jing Zhi Sheng , Zhou Ze Long , Yu Chao Fa , Xie Rong Yue
Published: March 2013

Cupped wave gyro’s mathematical modeling is derived via Hamilton principle, and the displacement equations and the nature frequency of gyro is determined by Galerkin method. Based on the modeling analysis and finite element method, the parameters of structure are optimized. The paper provides a reference in the design and fabrication of cupped wave gyro.
Design and Simulation of Space Deformable-Contact-Surface-Based End Effector
Authors: Ran Huang , Zhou Qian Xiang , Liu Zhong Qi
Published: March 2013

It is common to use space arm for maintaining and assembling. The major technology problems to solve first are the deformability, the soft and tightening contact with the target. Use ER as the contactor of end effector which is learned from the space station end effector can overcome many problems, as the poor location precision and uncontainable attitude which is bring by the big space arm. The design of multi-DOF Deformable-Contact-Surface-Based shape adaptive end effector is introduced in this text. The simulation result by Matlab software proves the design not only can tight connect the target, but also can suppress vibration and meet the precise demand of location, precise force control and deformability. It can meet the multi-mission in the future.
Active Noise Control Based on TMS320C5509
Authors: Ma Yong Wei , Gou Xin Ke , Du Xian Jun , Ren Chong Yu
Published: March 2013

The feed-forward adaptive active noise control (AANC) system is presented. Firstly, the hardware project of the system is brought forward, by selecting TMS320C5509 DSP as the controller. Then, using the mixed language, the active noise real-time control system is realized, based on the FXLMS algorithm. It’s proved that a good noise cancellation is achieved by the experiment.
A Novel Wireless Energy Saving and Reliable Angular Accelerometer on Engineering Polyimide with Xenon Gas Filled in Chamber
Authors: Lin Jium Ming , Liaw Chien Chow , Luo Wen Chen , Lin Cheng Hung
Published: March 2013

Four novel ideas are proposed in this paper to integrate an active RFID tag with thermal convection angular accelerometer on an engineering plastic substrate, thus the device is a wireless sensor. The first innovative idea is that this device is without any movable parts, so it is very reliable. The second new idea is that it is made on an engineering plastic substrate, such as polyimide, the thermal conductivity is much lower than silicon, so it can save more power and very useful for mobile operation. The third new idea is that the xenon gas is applied in the chamber for heat convection instead of CO2 used in the traditional thermal convection accelerometer. Carbon dioxide can produce oxidation effect to the heater and thermal sensors, while the inert gas xenon will not. The fourth new idea is the most powerful one to integrate with an active RFID tag on the same substrate, thus it is very useful for mobile operation, and is very easy for usage and fabrication. If one considers sensitivity as the first priority, then choose the floating structure (233°C/(rad/s2)). On the other hand, if the response speed is the requirement, then the non-floating structure is better (70μs).
The Design of Fast Charge and Energy-Saving Charge System of Battery
Authors: Meng Xin Yuan , Zhang Chao , Duan Chao Wei
Published: March 2013

This thesis is based on the battery theories and the technologies of battery charging. On the design of fast charging and energy-saving system of battery, it combines the features of pulsed charge and the rapid interrupt charge methods, and simplifies the circuit structure of the power supply, which reduces the loss of energy and enhances the efficiency of power conversion. It also uses capacitors for storing the energy of the pulsed discharge, and then charging back to the battery, so as to achieve both the aims of fast charging and energy saving.
The Design and Implementation of Intelligent Power Distribution Park Distribution Equipment
Authors: Wang Yi Jun , Liu Zhuang , Jia Wu Xuan , Liu Hai Bo , Tu Shi Liang
Published: March 2013

The integration, integrated device integration solution is an important part of the Intelligent Power Distribution Park, perfect, versatile intelligent components platform made the equipment intelligent become possible. The paper presents the design of a general distribution equipment intelligent component platform, presents the intelligent component module structure and configuration program. And equipped with real-time operating system for intelligent units work together for the management, and can satisfy the requirements of the intelligent power distribution equipment. Finally, carried out the Verify of GOOSE protection trip delay for real-time to the Intelligent Component Platform, the results meet IEC61850 standard requirements, providing a reference for the follow-up research and development of power distribution equipment intelligent components.
After Service Collaborated Management Platform Based on ASP Mode
Authors: Fang Ji Tao , Wang Hui , Deng Wei Wei
Published: March 2013

In after-sales services of Heavy-duty automobile industry, a major problem is analyzed, and the after services collaborated management integrated platform based on ASP mode is put forward. The system structural and functional model of this platform is also introduced. Supported by web service technology, the framework of ASP mode is established, and the integration of produce process information and after-sales services process information is realized. The answer pace and quality of after-sales services is greatly improved.