bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis and Calculation of the Flow Pressure in the Multipoint Steam Injection String of a Horizontal Well
Authors: Xu Xin
Published: October 2014

The multipoint steam injection string of the horizontal well is a commonly used downhole component for high efficiency steam injection of the thermal recovery horizontal well. A reasonable layout of the valves to ensure an even steam output of each point is still not well designed. At present, a general design method which is urgently necessary isn’t applied by each factory. According to the balance relationship of the momentum, the energy and the mass of the fluid flowing in the string, the pressure distribution equation of the fluid flowing in the multipoint steam injection string is built. On the basis of this equation, the design calculation method of the multipoint steam injection string is come up with. A specific example is given in the paper. Study shows that, with the equation built in this paper, the string can be designed with each axial valve having the same output, so that the technical demand of an even steam injection of the horizontal well section can be met.
Injection-Production Parameters Optimization Research SAGD Production Stage
Authors: Fu Yue , Qu Wen Chi , Song Xin
Published: October 2014

Steam assisted gravity drainage (SAGD) technology has been industrialized popularization and application in our country, according to the characteristics of Xing group I SAGD experimental zone in liaohe oilfield, SAGD production stage injection-production parameters such as the operating pressure, Sub - Cool control, steam injection rate, steam dryness, production factor are studied and selected.
Liquid-Solid Coupling Characteristics in the Fluidized Bed Evaporator for Tobacco Refined Liquid
Authors: Wang Feng Lan , Yao Yuan Jun , Gong Fa Yun , Ye Fang Ping , Qi Wen Jie
Published: October 2014

Consider a two-phase liquid-solid coupling effect, using Euler - Euler two-fluid model is solved using standard viscous term with k-ε model and the velocity pressure coupling a simple algorithm to simulate liquid-solid two-phase flow characteristics of the fluid flow method bed, the applicability of the model to assess the drag. Different effects of a two-stage flow characteristics of fluidized bed flow characteristics, fluid and operating conditions affect the physical properties of the paper. We found from the simulation is the use of different drag coefficient models will greatly affect the results, which drag force model Syamlal - O'Brien is more suited to study the coupling characteristics of liquid flow in a fluidized bed of solid than Gidaspow. And velocity of the inert particles increase with the viscosity of the liquid increase. Further, the maximum speed of the inert particles in a fluidized bed by a central, which means the settling velocity in the fluidized bed of inert particles is the slowest; increasing liquid density and lead to increased speed of the inert particles; volume of the inert particles Score changes can also affect the speed of the particle velocity distribution, and there is no linear relationship.
The Application of Computer Simulation Technology in Building Design
Authors: Yu Ling
Published: October 2014

From the simulation software selection, meteorological data collection, model, boundary conditions, calculation setting and evaluation indicators, the paper summarize simulation method of wind, light and sound, summarize three kinds of environmental. The paper study on optimization analysis method of green building from four aspects of building orientation, architectural form, architectural layout and indoor environment, and puts forward the optimization scheme of the typical simulation analysis of simple questions; provide guidance for optimizing the design of green building. Finally, ECOTECT can adapt to the current domestic engineering design and consulting on green building simulation and design requirements, and has a broad application prospect.
In Rail Quenching Unit, Numerical Simulation Study of the Evolution Rule about Tissue and Stress of Rail Head in Quenching Cooling
Authors: Chen Lin , Zhang Zhi Gang , Liu Yu Yan
Published: October 2014

In this paper, based on electric quenching production process in rail and beam factory of Baotou steel, using the finite element software DEFORM-3D, with 60kg/m U75V rail as the prototype, established a three-dimensional model of rail residual heat quenching to simulate and calculate evolution law of tissues and stress on rail head in quenching cooling process in quenching unit, and provides a theoretical basis for finding reasonable optimal cooling rate of rail head in the rail online residual heat quenching process.
Establishment and Application of Mathematical Model of Hogarth Curve
Authors: Zhang Ling Xi , Zhang Hang , Zhu Xu Yun , Wang Jian Ping , Liu Dong Yue
Published: October 2014

By means of Hogarth curve theory and combined with mathematical model establishment process, equations of drawing Hogarth curve were built and the curve images were restored by mathematical software in this paper, as the evaluation standard of curve aesthetics in fashion design. In the practical application, one can compare the designed curves with the mathematical model of Hogarth curve: the higher degree of fitting, the more beautiful the curve modeling is. This method has good guidance significance in future fashion design and clothing purchase.
Natural Gas Distributed Energy Development Dilemma
Authors: Li Wei , Liu Bing Qing
Published: October 2014

Natural gas is a major type of distributed energy. In the current power system structure aging, environmental protection, energy utilization efficiency bottleneck and the user requirements for power quality standards increased the world's demand for new energy. So the development of distributed energy has become the common choice of the countries around the world and become the new direction of global energy development. Compared with the traditional energy supply distributed energy has many advantages, but because of its grid producing, feed-in tariffs, subsidies rules is not detailed, unclear development ideas led to the development of distributed energy slowly. How to develop effective policies to promote the development of natural gas distributed energy become the hot spot of attention.
Design of Scenery Complementary Solar Water Heater Based on Eddy Current Method
Authors: Huang Tong
Published: October 2014

This paper uses scenery complementary heating method to discuss a new type of scenery complementary water heater design. This product can be divided into two parts. The first part is the eddy current method wind power heating part, which is driven by wind power and vertical axis wind turbines and the design of magnet array rotor disc rotation, namely, magnetic field rotating, induced eddy current in the stator, so as to generate heat. The second part is the solar heating part. This works has broad market prospect, which provides a new idea for large-scaled heating method.
Performance Analysis of a V2G Brokering Agent
Authors: Lee Jung Hoon , Kang Ji Hyun
Published: October 2014

This paper first presents a brokering architecture for a vehicle-to-grid electricity trades between electric vehicles and a microgrid, and then measures its performance, particularly focusing on the stay time, which significantly affects the scheduling flexibility. The brokering service matches demand and supply on battery-stored energy, traversing the search space to find an energy allocation for each time slot. The slot-by-slot schedule, generated from the two-way interaction protocol, coordinates the arrival time of each seller at the microgrid, achieving temporal and spatial power load shift. The performance measurement based on a prototype implementation analyzes the effect on the lacking and surplus energy, the demand meet ratio, and the effective consumption ratio. The experiment result shows that the brokering scheme can fully take advantage of enhanced flexibility in placing available energy on the time slots, reducing the lacking amount by up to 38.4 % as well as enhancing the consumption ratio by up to 27 % for the given parameter set.
Research on ETABS Steel Tower a Top Building Structural System
Authors: Wang Guang Feng
Published: October 2014

Equipping steel tower atop building structural system at the top of high-rise buildings is applied increasingly. However, the earthquake disasters indicate that under seismic effect, the tower on the roof reacts strongly to the earthquake, and the gazebo is damaged greatly under the condition that major structure has no earthquake damage. Based on analyzing the characteristics and application methods of ETABS software, for engineering projects, the paper uses ETABS software and simplified calculation method to calculate and make comparison analysis on steel tower atop building structure. The analysis results indicate that the method established in the paper has higher accuracy, which can meet the engineering requirements.
Oxidative Desulfurization Performance Optimization of Tert-Amyl Hydroperoxide
Authors: Huo Ning Bo , Liu Zhi Gang
Published: October 2014

The desulphurization experiment of oil-soluble oxidant tert-amyl hydroperoxide with dibenzothiophene dissolved in decalin as model-oil was researched. Characterisation on oxidation product was made, and dibenzothiophene removal rate was computed. The influence factors of the oxidative reaction regent amount and the condtions of reaction temperature and reaction time were optimized and compared. The best reaction condition was reaction temperature 90°C, reaction time 3 h, ratio of oxygen to sulfur 4:1, catalyst amount 0.12 g. Dibenzothiophene removal rate reached 97% in this reaction condition.
The Development of Green Design and Research on Product Design for Recycling
Authors: Zheng Ze Feng , Su Ke
Published: October 2014

The paper analyze and comprehensive evaluate on the characteristics of the product life cycle in each link of the green product design and the life cycle, has obtained a series of design green design optimization method. In the choice of materials, this paper presented a method for the re-combination of recycled materials. In the recovery of the product it proposes the establishment of recycling system, and expounds the concept upgrade recovery. Design and manufacturing of green products and green recycling industry is the two most important link in green circular economic system, whether or not the coordinated development of the two sectors, is the key to the success or failure of the strategy of sustainable development.
Design of Project Management Information System for Electricity Infrastructure
Authors: Zhang Lei
Published: October 2014

In order to solve the existing problems of power system infrastructure project management, through the summary of power engineering project management experience and lessons learned, and make use of modern computer technology, network technology, various kinds of information integration and processing, the paper constructs the infrastructure information management platform that can provides a wealth of necessary information for construction project decision makers. This paper designs a kind of electric power construction project management information system, design and presented the function module structure and its subsystems in this paper, and finally completes the system development. The function of this system meets the design requirements, to improve and standardize the project management of electric power engineering.
The Description of Precision Forging Technology in Closed Die of Mg Alloy AZ31 Using Computer Simulation
Authors: Kapustová Mária , Bílik Jozef
Published: October 2014

Automotive industry is nowadays constantly strengthening its dominant position. Its primary objective is to reduce weight of automobiles in order to decrease fuel consumption and amount of harmful pollutant emissions. From the viewpoint of further development in the field of automotive industry, very interesting are the issues of die forgings production from light non-ferrous metals. This article describes research of precision die forging technology in closed die with regard to magnesium alloy type AZ 31. Given alloy type Mg-Al-Zn is suitable for bulk forming and is characterized by good formability at hot conditions. Results of this research may be applied to production of forgings with longitudinal shape, e.g. levers and connecting rods. In order to verify the design of forging technology in closed die for lever-shaped forged piece the simulation program MSC.SuperForge was used. Numeric simulation of die forging process confirmed suitable designed shape and dimensions of semi product and also correct material plastic flow in cavity of closed die.
An Application of Fuzzy Logic Control Algorithm in Hydro Mechanical Deep Drawing Process
Authors: Ozturk Ekrem , Turkoz Mevlut , Halkaci Selcuk , Halkaci Mehmet
Published: October 2014

Hydro mechanical deep drawing (HDD) process is an advanced sheet metal forming technology. The aim of this process is to form deep drawn cups without any kind of forming instability such as buckling, wrinkling or bursting (tearing). The most important parameters in achieving this goal are fluid pressure and blank holder force. So in this study, a fuzzy logic control algorithm was used with Ls-Dyna FEA subroutines to determine the optimum fluid pressure (P) and the blank holder force (BHF) since it requires a lot of time and cost to perform this work with trial and error experiments. Minimum element thickness, punch wall contact position and wrinkling height were used as input parameters in the control algorithm. But studies on determining the BHF with the wrinkling height parameters have not been carried out yet. This will be investigated in further studies.
Study on Walking System Technology of Crawler Combine Harvester
Authors: Lou Xi Yin
Published: October 2014

Crawler combine harvester walking system is various transmission technology are organic and reasonable matching, foster strengths and circumvent weaknesses, complementary drive system so as to achieve the best overall. Stepless speed walking is particularly suitable for complex condition changes, the demand of drive system for a more comprehensive, more comprehensive, objective stepless speed walking in transmission system innovation or seek better performance, and as a mechanical transmission device of the planetary gear has the advantages of small volume transfer large torque, high efficiency. The combination of both realizes stepless transmission, and has the advantages of low speed and high torque. Hydraulic drive system is mainly to achieve stepless speed regulation, commutation, planetary gear drive mainly reduce speed, increase the torque to. Composite transmission mode that can greatly improve the transmission ability, expand the scope of speed adjustment. In fact, combine the stepless variable speed running and control technology can greatly improve the performance of the product, especially the effect on production efficiency, durability, controllability, environment adaptability, green characteristics were significantly.
Design and Experiment of Fumigant Gas Trace Detection System Based on Photoionization
Authors: Gong Shao Run , Wang Yue Jin , Zhang Guang Ping , Zhan Guo Ping , Zou Bing , Li Li , Liu Tao
Published: October 2014

To meet the requirements, based on the provision of Administration of Quality Supervision, Inspection and Quarantine (AQSIQ), of gas leakage monitoring inside dosing room of fumigant warehouse at the inspection and quarantine port, a fumigant gas trace detection system (FGTDS) based on photoionization detector (PID) is developed. The principle, structure and characteristic of the system design are especially demonstrated. The test data under different temperature, relative humidity (RH) and methyl bromide concentration demonstrate that the FGTDS based on PID can measure methyl bromide under very low concentration. A conclusion can be drawn that the requirements of gas leakage monitoring inside dosing room of fumigation warehouse at the inspection and quarantine port can be met through further proper design.
Design the Integrated Multipurpose Instrument Calibrating Equipment Based on the PXI and LabVIEW
Authors: Li Hai Ming , Zhang Li Mei , Sa Feng
Published: October 2014

According to the function, the technical indexes and the cost control etc, we select the embedded control computer and virtual instrument module based on the PXI, and developed the integrated multipurpose instrument calibrating equipment, it realized the field measurement and calibration of the electrical instrument away from the laboratory. The system is designed based on PXI and LabVIEW, it uses virtual instrument technology, automatic control technology and database technology, by combining these functional modules of NI, we realized the calibration of electrical instruments such as digital multimeter, signal generator, oscilloscope and cymometer etc. The system is used integrated design, and it is very flexible, it can be popularized and applied as working standard to troops, factories or schools etc.
Fuzzy Diagnosis Method of Aero-Engine Fault
Authors: Cheng Jian , Bao Chuan Mei , Huang Yi Su , Sun Ye , Yi Zhe Jing
Published: October 2014

A diagnosis method of aero-engine faults based on Mamdani fuzzy inference is proposed in this paper. Regarding the fault symptoms of aero-engines as input of fuzzy inference, the proposed method establishes rules of inference from experts’ experience and distills the implication relationships. On this basis, the fault symptoms are combined with the implication relationships to obtain the probability of fault causes, so as to achieve the diagnosis of aero-engine faults. The results of experiments showed that the method is feasible and effective.
Study on Damage Tolerance of Composite Laminates with Hole or Crack
Authors: Yao Wu Wen , Zhou Ping , Hou Sheng Li , Tu Ming Wu
Published: October 2014

By means of computation and analysis of damage tolerance of composite laminates with hole or crack, the conclusion is brought forth that crack on laminates can’t be cut into hole to improve the residual strength; otherwise the damage will become more serious. The method and conclusion can be reference and basis for battle damage repair of airplane composite component.
Design of Examination and Adjustment Instrument of Artillery Zero Line Base on Laser Technique
Authors: Liao Xue Bing , Cui Qing Bin , Peng Lei , Wen Gu Sheng
Published: October 2014

In accordance with the character sight device of artillery, an examination and adjustment instrument of artillery zero line base on laser technology is designed, and the structure and key technique and design principle of the system are described in detail. The method overcomes some shortcomings of traditional diagnosis system and is available in practice.
A Novel Method for Measuring the Evenness of Raw Silk
Authors: Tu Wen Xiao , Li Jun Juan , Wang Chen , He Zhi Yong , Zuo Bai Qi
Published: October 2014

In this thesis, A novel method for measuring the evenness of raw silk is introduced. Firstly, the moving raw silk images are captured by image acquisition system including a Charge Coupled Device (CCD) line sensor, a telecentric lens, a light source. Then, the raw silk images are processed sequentially with threshold segmentation, morphological opening operation. Threshold segmentation is used to realize the separation of raw silk and background, morphological opening operation can eliminate the protrusion and the loop fiber which surrounding the main body of raw silk in the binary image. the coefficient of variation (CV value) of diameter is adopted to characterized the raw silk evenness. its suitable performance is illustrated using experimental results.
The Application of Artificial Intelligence Technology in the Selective Laster Sintering
Authors: Cai Li Yuan , Wang Qing Shun , Sun Wei
Published: October 2014

Based on laser sintering constituency as the research object, this paper aimed at the perspective of artificial intelligence technology. It uses the new control theory and research method of BP neural network algorithm and tries to provide reference for optimizing the sintering process of laser district. This paper argues that the application of artificial intelligence technology to laser sintering constituency. Through the simulation, it can make up for the inadequacy of the traditional control method. Under certain conditions, the goal of process optimization will be achieved by finding the optimal parameters.
Power and Vibration of Electrostatic Precipitator Control Based on FPGA
Authors: Zhang Zi Sheng , Wang Chun Sheng , Wang Yi , Wang Zhan You , Song Deng Yuan
Published: October 2014

In order to improve the automation level of the electrostatic precipitator, we used Very-High-Speed Integrated Circuit Hardware Description Language (VHDL) language to compile, emulate and optimize the control system of power source and vibration. In the design of Quartus platform, we used EP1C3T144C8 Field Programmable Gate Array (FPGA) chip to realize high voltage power supply, alarm and protection system. We also realized the compilation and simulation test of each part’s function of 20 s rapping and 40 min rapping cycle. At the same time, we recorded the waveform of simulation. It demonstrated that the validity of the relevant VHDL compilation. We used this method to achieve the optimization control of the electrostatic precipitator operating parameters. It has a strong practicability.
A Fuzzy Predictive Controlling Method of Fermentation Tank Temperature
Authors: He Tao , Hu Xiang , Chen Jiu Yin , Wang Xian
Published: October 2014

Liquor fermentation is a complex biochemical process, to control the temperature of fermentation tank fastly and accurately in the process can improve the efficiency and quality of fermentation .Because of the nonlinear and time lag of the process, meanwhile the conventional PID control and is difficult to solve practical problems in precise control,So this paper puts forward a fuzzy predictive controlling method, by combining the advantages of fuzzy control and predictive control for big lag, nonlinear fermentation systems.After using MATLAB to make comparative data simulation, the result shows that the proposed design method can better dynamic and static characteristics of both system, with static characteristic small overshoot, fast response, high steady precision, etc, can be useful in industrial control systems.
Research on Prediction Model of End Sulfur Content for Converter Smelting
Authors: Qiu Dong , Dai Wen Juan , Zhang Nan
Published: October 2014

Converter smelting medium-low carbon ferrochrome replaces electronic by oxygen and reduces production energy consumption greatly. Medium-low carbon ferrochrome end sulfur content analysis is necessary to determine the product quality. Now we still use the product sampling, laboratory analysis to determine end sulfur content, which can not realize online monitoring. According to this status, a PLSBP prediction model of end sulfur content has been established based on particle swarm algorithm, which combined partial least squares method and BP neural network. At the same time, A feedback compensation model has been established by dichotomy, which avoided the model failure caused by raw material quality change. The simulation results showed that the hit rate of prediction model was 96.67% within the absolute error, 90% within relative error. High precision was achieved, which provided an important theoretical basis to improve product quality and optimize the production process.
Paralleling Hydraulic Control of Variable Frequency Motor and Valve for the Swing Mechanism of Segment Erector
Authors: Yang Xu , Gong Guo Fang , Wu Wei Qiang , Rao Yun Yi
Published: October 2014

Aimed at achieving a high speed and precision circumferential positioning of pipe under low energy consumption, a paralleling hydraulic control of variable frequency motor and valve (PHC-VFMV) system is designed for the swing mechanism of segment erector. Firstly, with a view to the working principle of the swing mechanism, a hydraulic circuit of the PHC-VFMV is designed. Then, two sub-circuits of the hydraulic circuit are separately modeled and equipped with suitable controllers. Finally, one valve control (VC) system and the designed PHC-VFMV system are tested in AMEsim platform. Results show that, while guaranteeing a good performance of speed and accuracy, the PHC-VFMV could achieve a better performance in energy saving than VC.
Research on Oil Temperature Control Technology of Mobile Machinery in Closed Hydraulic Transmission System
Authors: Lou Xi Yin
Published: October 2014

Hydraulic oil temperature with the system condition, environment temperature and heat exchange characteristics, is one of the most significant parameters affecting the performance of hydraulic system. Oil temperature directly changes oil viscosity and leakage characteristics, which affects the damping effect on system performance of hydraulic oil ratio, thereby affects the stability of the hydraulic system and dynamic response. At the same time, it also can cause the seal metamorphism and oil oxidation failure, which causes corrosion and formation of sediments, which affect the normal operation of the system, even brings harm to the equipment. Therefore, improving the working performance and reliability control through the analysis of hydraulic oil temperature is necessary.
Development of the HWIL Training Simulator of UAV Engine
Authors: Sun Ye , Bao Chuan Mei , Yi Zhe Jing , Cheng Jian , Xiao Qing Chun
Published: October 2014

A hardware-in-the-loop (HWIL) training simulator was developed to avoid high cost and realize intuitionistic teaching in the engine maintenance teaching of a certain type of unmanned aerial vehicle (UAV). The oil free engine HWIL simulator was achieved by the driver-to-the driven switch. According to the needs of teaching , the function of dynamic real-time control in different working areas was implemented by combining dynamic monitoring of the computer with real-time controlling of the single chip microcomputer. The successful development of the simulator improved the teachers’ teaching ability and cadets’operation ability, cut down the training cost and reduced the teaching risk to zero by indoor training of large weapons and equipment.Keywords: engine, simulator, hardware-in-the-loop simulation, teaching
Optimization Algorithm of Real-Timing Signal Control for Isolated Intersections
Authors: Shi Hui Hua , Chen Hui jin , He Qing
Published: October 2014

To make full use of green time of each phase to alleviate congestion in urban isolated intersections, an optimization algorithm of real-timing signal control is proposed. By monitoring traffic flow at the isolated intersection, the average utilization rate of green time of each phase is calculated. The green time of each phase is then adjusted automatically to maintain a balanced green time utilization rate with the presented optimization algorithm. Simulation results indicate that the average delay and the queue length of the presented algorithm are less than the fixed-time signal plan at peak times, and the efficiency of the intersection traffic is improved.
Applied Research of Ant Colony Algorithm in Fault Diagnosis
Authors: Bai Shi Hong , Guang Li Rong , Liu Zhi Wei
Published: October 2014

The ant colony optimization algorithm is applied in the fault diagnosis of the production equipment, on the basis of the study of it, the relative fault diagnosis model was established. According to the data of a kind of chemical reactor, the eight values of different state were extracted and used to train the fault diagnosis model. The result of the test is turned out to be accurate and the application of such a kind of algorithm is a high-quality approach to fault diagnosis.
Wave Spring Dynamic Characteristics Analysis
Authors: Lu Mo Wu , Wang Tan
Published: October 2014

The natural vibration frequency and forced vibration amplitude of the spring decides the stability of the whole of the spring system. Take the monolayer wave spring as the research object, do dynamics analysis for the three different kinds of wave spring with the same structure parameters. Obtain the natural vibration frequencies of the three kinds of spring through modal analysis, the result shows that the natural vibration frequency of the integral type wave spring is the highest, then is the wave spring with opening, the natural vibration frequency of the wave spring with lapping is the lowest. Do the harmonic response analysis for the springs based on the modal analysis result, the result shows that the main vibration direction of the wave spring is the symmetry axis direction of the spring, all the three kinds of the spring is much easier resonate in this direction. Through the above provides certain theoretical guidance for the design of the wave spring
BP Neural Network Based Optimization for China Railway Freight Transport Network
Authors: Sun Yan , Lang Mao Xiang , Wang Dan Zhu
Published: October 2014

In order to optimize the railway freight transport network, integrate the limited transport resources and overcome the current problems existing in the traditional transport organization, in this study, we propose a three-layer railway freight transport network system, analyze its hierarchical structure and describe the respective function orientation of the railway freight stations in different layers. Then we design a BP neural network model with adaptive learning algorithm and momentum BP algorithm to classify the railway freight stations into three layers. Finally, an empirical case study is presented to test the feasibility of the BP neural network. The simulation result indicates that the BP neural network model can classify the railway freight stations into three layers under relatively high training accuracy.
A Novel Extracting Algorithm of the Low Gray Fuzzy Edges for Infrared Images
Authors: Li Dong Xing , Geng Liang , Du Qin Jun , Ren Han , Li Ai Jun , Tang Shi
Published: October 2014

The fuzzy edge detection algorithm proposed by Pal-King has some disadvantages for extracting the low gray level edge information for the infrared images, such as high computation complexity, low threshold segmentation inaccuracy and the leakage edge information. For overcoming the disadvantages, the improved image fuzzy edge detection algorithm is proposed in this paper. First, redefining membership function to simplify computation complexity, the new conversion function enable the function transform interval is [0, 1], thus the value of the low gray level edge is not to be set to 0. Second, Ostu's algorithm is used in the selection of segmentation threshold named as transit point. The traditional threshold value is improved in order to make the segmentation accurate. The experimental results show that the lower gray infrared image edge information is preserved via proposed algorithm in this paper. The detecting results are more accurate. The run time is decreased obviously than the traditional Pal - king algorithm.
Research on the Loading Pattern of Embedded System
Authors: Gao Zhan , Zhu Qing Bo , Tang Sheng Lin
Published: October 2014

With the development of information technology, ERTOS(Embedded Real-Time Operating System) not only has involved in the scientific research and engineering domains, but also has many affinities people's life. Loading pattern performance is the most important performance of Embedded Operating System. It needs dispatching all available resources to achieve real-time task. In order to correctly evaluate the performance of a real-time Embedded Operating System, we must be scientific, systematic approach to ERTOS study of the comprehensive performance and accurate testing. This article discusses three loading patterns and the layout of the memory map on the Flash, RAM and external storage media, with tested on hardware platform it description the advantages and disadvantages of this three loading pattern.
The Design of Climbing Rod Car
Authors: Zhang Xiao Hong , Han Xue Mei , Hu Jun , Liu Yang
Published: October 2014

Combining the principle of practical car and some of the pole machine in life, using the flat quadrilateral mechanism and institutions, the ratchet wheel and pawl springs structure, sprocket, chain transmission, I cleverly put forward a kind of car that can attach to the surface of the rod , climb vertically and be controlled remotely. On the structure, the unique spring clamping compensation mechanism realize the variable diameter bar crawling easily. Clever lever principle to institutions of successful implementation of its own gravity can be converted to climb bar pressure, which can overcome the climb machine is limited by its own gravity.
Research on Virtual Real-Time Simulation System Based on EON
Authors: He Tao , Wang Xian , Hu Xiang , Xiong Jian , Deng Yuan Chao
Published: October 2014

For the issue that traditional PLC simulation software can not really simulate motion scenes, in order to allow the PLC program can run in the scene intuitively, and the program is compiled to avoid inadvertently causing the actual operation of the collision, we use a combination of simulation software EON and VC + +, build a simulation platform to make compiled program shown in real time simulation system. It achieves interactive control of EON and VC + +. By writing the industry VGA car program, comparing the results out of the simulation program to verify the practicality of the platform. The results show that it is also applicable to larger and more complex systems.
Possibility Theory on Economic Problems
Authors: Tian Hui Zhu , Dong Zhong Qi , Huang Wei Qing , Li Wen Xin , Yang Ying
Published: October 2014

A random phenomenon is so common in human economic activities, during the process of researching and revealing the random phenomena, as a theory of probability, Mathematical expectation has been widely used in the field of social economy. Based on the analysis of the specific case in the actual business decision-making, this article lists the average in the prediction, reducing work load and the gross profit maximum problems; through the establishment of random variable model, using the theory of mathematical expectation for data measured to choose the best scheme, method and procedure to provide policy makers who make the best choice the best theoretical basis; aiming to make the operators more scientific and rational when choosing investment and catching investment opportunity, Mathematical expectation plays an important role in economic activities.
Knowledge Management for Product Development: A Review
Authors: Lan Bo
Published: October 2014

Engineering product development is becoming increasingly collaborative and knowledge-intensive in today’s industry. On one hand, the product development process comprises various tasks that involve extensive knowledge exchange and communication among geographically distributed teams. On the other hand, the product development teams usually reuse engineering knowledge from previous design experience when solving new design problems. Therefore, there is a strong need to capture, store and reuse the knowledge for product development. In this paper, different understanding and classifications of engineering knowledge are presented. Two aims of knowledge management for product development are analyzed. And the researches on the engineering knowledge management are summarized based on critical phases of knowledge management process. Finally, future research directions of knowledge management in engineering are discussed.
Particle Swarm Optimization for Chemical Multi-Stage and Parallel Batch Scheduling
Authors: Tang Qi , Liu Peng , Tang Jian Xun
Published: October 2014

This paper presents heuristic particle swarm optimization (HPSO) with continuous codes representing the batch production on the machine at each stage to enhance the ability of particle to handle constraints. Repair strategy of particle location is also presented in this paper to meet the demand for products and maximum restriction of production capacity. Based on the analysis of characters of optimal solution, all constraints are unified as time window of batch and solving method for resource-constrained project scheduling with time window is put forward. In order to verify the performance of HPSO, this paper uses random example to conduct test. The results show that HPSO is superior to optimization software and standard PSO.
The Research of Manufacturing Technique about Intertwined Stator Core in Automotive Alternator
Authors: Sun Hong Zhe , Li Wei Min , Ma Dian Wen , Sun Jian
Published: October 2014

Intertwined automobile generator stator core is made from twisted Strip steel with teeth. This winding process is different from the method of traditional laminated machining. Intertwined technique is a new method that for the manufacturing of stator cores in automotive alternators. The productive process include such key steps: Leveling of the bar-typed materials, stamping, enwinding, soldering and plastic. This methods has raised the production efficiency and used ratio of the materials, and even make a cost reduction compared with the traditional ways of strap-typed stator core manufacturing. They are able to make a substitution to the imported products by most automotive alternator enterprises as well as complete the blanks of domestic market and have a large extent of social and economic benefits.
The Design of the Rolling-Shoe Bearing Device Based on Rotary Cylinder
Authors: Gui Wei , Huang Zhi Chu , Chang Hong
Published: October 2014

In this paper ,design a kind of rolling-shoe bearing device for supporting rotary cylinder, compare the characteristics of sliding shoe, roller, Rolling-Shoe Bearing, introduce the work principle of r Rolling-Shoe Bearing device, describe the overall structure of Rolling-Shoe Bearing device, the roller arrangement scheme, the design scheme of the raceway cover and structure of the main parts of the device. Research shows Rolling-Shoe Bearing device improves the stability, the reliability of the equipment operation, reduces the cost, and prolongs the service life of equipment.
Possible Solutions for Ground Slabs of Energy Efficient Buildings
Authors: Sedláková Anna , Majdlen Pavol , Ťažký Ladislav
Published: October 2014

The building envelope is a barrier that separates the internal environment from the effects of weather. This barrier ought to facilitate the optimal comfort of the interior environment in winter as well as summer. It has been shown in practice that most building defects occur within the building envelope. This includes external walls, roofs and floors too, and is impartial to new or renovated buildings. Heat losses of buildings through external constructions – roof, external walls, ground slabs are not negligible. It is therefore important to pay more attention to these construction elements. Basementless buildings situated on the ground are in direct contact with the subgrade and its thermal state. An amount of heat primarily destined for the creation of thermal comfort in the interior escapes from the baseplate to the cooler subgrade. The outgoing heat represents heat losses, which unfavourably affect the overall energy efficiency of the building. The heat losses represent approximately 15 to 20 % of the overall heat losses of the building. This number is a clear antecedent for the need to isolate and minimalize heat flow from the building to the subgrade.
Modelling of a Small Solar Collector Array and Comparison with Meteorological Data Using TRNSYS Energy Simulation Software
Authors: Vyhlídalová Karolína , Horák Petr
Published: October 2014

This article deals with the modelling of a small domestic solar collector array using Transient System Simulation Tool. The model was developed using meteorological data included as part of the Transient System Simulation Tool , mean regional data and actual meteorological data collected near the site of the solar array during testing. The main aim of this study was to compare the results of model simulations using the different types of meteorological data. The most accurate simulation was that prepared using meteorological data collected near the site of the solar array. Even here, however, differences were observed due to the equipment used to monitor heat gain, that is earlier insolation of the meteorological station.
The Issue of Including the Influence of Thermal Bonds in the Passive House
Authors: Kubenková Kateřina , Jašek Marek
Published: October 2014

Influence of thermal bonds when evaluating the energy performance of buildings can be included in the calculation approximately by means of a surcharge on the effect of thermal bonds or precisely by using specific linear heat transmission coefficient for thermal bonds between structures. The article presents a comparison of the two options in the energy performance of a particular building, the specific amount of heat for heating the building of a brick passive house based on the foam glass.
Analysis of the Degradation of External Plasters in the Buildings with ETICS
Authors: Kučeriková Veronika , Kraus Michal , Kubečková Darja
Published: October 2014

The external plaster are currently the most common finish coat of buildings. The characteristic technological and chemical properties of plasters protect supporting structure against weather and temperature extremes. Quality of plaster is determined by its durability, which depends primarily on the quality of raw materials, the quality and porosity of the substrate, the temperature during application, concentration of carbon dioxide and humidity of the ambient air. The physical and chemical and biological degradation of plaster is caused due to weathering and exposure to aggressive substances of environment. The paper deals with the analysis of the causes of degradation (green facades) and the possibilities of remediation of biotic attack of plasters buildings with External Thermal Insulation Composite System (ETICS).
Comparison of Polysun Simulation with Direct Measurements of Solar Thermal System in Rapotice
Authors: Jelínek Petr , Sedlák Jiří , Lišková Barbora
Published: October 2014

Design of small solar thermal systems used in family houses is currently commonly based only on experience of designers who rely on a few basic rules. But these sophisticated systems’ design should be tailor-made according to the needs and habits of the users, because their behavior has great impact on the systems’ efficiency. This is why we should use computer simulations – to design the most appropriate option that would fulfill the needs of the users. In this paper we compare computer simulation (using Polysun - Designer software) of a small solar thermal system installed on a passive house in Rapotice with in-situ measurements. From this comparison we make conclusions applicable for design of similar systems.
Advanced Thermal Performance Analysis of Thermal Break Element Applied in Balcony Slab
Authors: Buday Peter , Ingeli Rastislav , Čekon Miroslav
Published: October 2014

Thermal performance of any building component is the result not only of its thermophysical properties but also of a way of final installation and connections altogether of their all elements. In addition, thermal leakage and bridging in buildings can eventually contribute to a multitude of problems. The thermal bridge is the place in the building envelope through which heat transfer has a multi-dimensional nature. That is why in recent studies, the issue of heat transfer phenomena in the building components is considered as a multi-dimensional more frequently. One of the specific details that create thermal leakage is located in balcony slabs. This paper is focused on detailed analysis of thermal performance of thermal break element applied in balcony slab with relation to the thermal aspects of wall building envelope. Particular cases of commonly used balcony systems in buildings are observed related to multi-dimensional and parametric approach of modeling. As result of analyzed thermal aspects, such as importance of building envelope type and its thermal performance, variations of thermal properties, are presented as study findings that affected thermal bridges magnitude and resultant thermal performance of balcony slab detail.
Research of the Temperature Field Process in the Soil for a Home - Founded on a Foam Glass Granulate
Authors: Kubenková Kateřina , Jašek Marek , Panovec Vladan
Published: October 2014

Foam glass granulate is environmentally friendly, heat-insulating building material which is made from recycled glass waste. It is a very porous material with low density, with good thermal insulation properties, high static load capacity and almost zero water absorption. The paper deals with the research of the temperature field process in the soil under the floor of a passive house built on a reinforced concrete slab foundation with a layer of compacted subsoil using raw materials friendly to the environment in the form of granules of foamed glass. This method of progressive foundation of the building addresses the elimination of thermal bridges at the base and establish a continuous thermal insulating of the building envelope without thermal bridges.
Measurement and Calculation of Ventilation in the Floor of the Brewery Žirovnice
Authors: Jurka Jiří , Škramlík Jan
Published: October 2014

The article discusses how to test the functionality of air insulations designed for the floor ventilation in historic buildings and follows on from the previously published articles. A flow analysis is being performed on an object of the City of Zirovnice which has been registered in the list of cultural monuments and was built as a brewery in the years 1589-1592 on the site of an older medieval building. The foundations and external brickwork consist mostly of stone. This article brings new air flow readings. The aim of the article is to analyse in detail the air flow in a specific floor void with the aid of modern CFD programs and experimental measurements using the ALMEMO device.
Microbes in the Interior of Schools
Authors: Mocová Pavla
Published: October 2014

Article is focused on the concept of microbial microclimate, and microorganisms. Further described herein are sources of microorganisms. More details in the incidence of building structures. Hereinafter, the way the samples were taken for evaluation of microorganisms on building structures, notably the floors and walls. The comparison was also sampled benches. Samples were evaluated in the laboratory. The Petri dish is clearly shown which microorganisms are present; they are mostly mold and species Penicillium. Overall, they found any major threats of structures which have been taken.
Indoor Climate of Residential Interiors and Asymmetry of Radiation
Authors: Budiaková Mária
Published: October 2014

The paper is oriented on the indoor climate of residential interiors. Questionnaire survey in new residential building has showed problems with securing quality of indoor climate. In smaller residential interiors with large glazed surface was this problem bigger. Cause of problems was formation of local thermal discomfort. One of the most serious area of local thermal discomfort is asymmetry of radiation. To clarify asymmetry of radiation, there were carried out experimental measurements in a special microclimatic laboratory for convective heating. In this paper, there is presented the scientific analysis and the outputs from measurements. In the conclusion of this paper are introduced principals for designing the residential interiors without local thermal discomfort.
Daylighting: Prediction of Circadian Effects of Different Spectral Filters
Authors: Hraška Jozef , Hartman Peter
Published: October 2014

The study presented in this article aims to evaluate in which extent the interior colour surfaces affects human circadian stimulus. Experimental measurements in model rooms were evaluated by methods presented in studies by Rea et al. [1-3]. Even by high levels of daylight illuminances the colour of interior surfaces influences circadian stimulus, but this effect is not significant. Diminishing of circadian efficacy increases with application of dark blue-deficient colours of interior surfaces and by low intensity of daylight.