bluuebunny/crossref_metadata_2025 huggingface dataset:
Free Modal Experiment and Analysis of 4105 Diesel Engine Crankshaft Torsional-Bending Coupling Vibration
Authors: Li Xiao Hua , Shen Bei , Cai Yi Xi , Zhang Kai
Published: August 2013

In order to research the principle of crankshaft horizontal-bending vibration, free modal experiments of 4105 diesel engine crankshaft vibration was designed and done. Vibration parameters of free vibration, torsional vibration, vertical-bending vibration and horizontal-bending vibration were obtained respectively through different measurements points setting and motivation techniques. Through analysis of frequencies and models, a conclusion was drawn:the torsional vibration was just coupling with the horizontal-bending vibration.
Comparison Study of Membrane Flapping Wing Based on Mooney-Rivlin Model and Linear Model
Authors: Yu Chun Jin
Published: August 2013

The maximum deformation and stress are compared based on Mooney-Rivlin Model and Linear Model for flapping wing. One flapping cycle was divided into twelve segments, and maximum deformation and stress were calculated in each segment. The results show that max deformation and stress all occur at the beginning of downstroke, the max deformation adopted Mooney-Rivlin model is 25 percent of the max deformation adopted the linear model, and the max stress adopted Mooney-Rivlin model is only 0.37 percent of the max stress adopted the linear model. Mooney-Rivlin Material is very suitable for the membrane flapping wing.
Research on SysML-Based Modeling for Production Management System
Authors: Qiao Dong Ping , Liu Xiao Juan , Li Hao
Published: August 2013

A comprehensive and systematic model for the production process of large-scale equipment manufacturing can reduce the cost and time of the development and enforcement of the management system. The characters of a modeling language for systems engineering, SysML(Systems Modeling Language), are introduced, and through analyzing the complexity of the production management system for complex product, the basic requirements of its modeling are given; With the practical example in our project, SysML based model is built for production management system of complex product manufacturing ,the application of requirements diagram, use case diagram, block definition diagram, internal block diagram and activity diagram is introduced emphatically.
A Chance-Constrained Interval-Inexact Energy Systems Planning Model (CCIESM) for City B Based on Power Demand Probabilistic Forecasting
Authors: Wang Zong Wu , Huang Guo He , Niu Yan Tao
Published: August 2013

Energy management systems (EMS) are fraught with uncertainties, while current EMS models always deal with deterministic factors. The uncertainties in EMS could be expressed as interval values and probabilistic distributions. To tackle these uncertainties within EMS, a chance-constrained interval-inexact energy system planning model (CCIESM) was developed in this study, and the probability distribution of power demand was addressed with CCP, and interval values in the left and right hand was addressed with ILP. This probabilistic distribution was calculated through three models including relative electricity model, middle/long-term power demand prediction model and Shapiro-Wilk statistical model. The results of case study in city B indicated that CCIESM would have advantages of addressing interval-value and probabilistic distribution in EMS.
Miss Distance Error Analysis of Strapdown Seeker Imaging System
Authors: Bai Yang
Published: August 2013

Providing an exact miss distance is the goal of strapdown seeker imaging system. Real-time correction of target miss distance is always introduced. The values of miss distance are the key factor influencing exactness of LOS (line of sight) rates. Thus the miss distance needs to be stable. Three key measurement error sources of strapdown seeker imaging system are analyzed. There are imaging errors, tracking errors and time delay errors. The causes of different errors are discussed in this paper. The influence of the errors on outputting of miss distance is analyzed. The goal of image error analysis is to reduce the errors. Finally, some methods for reducing error are presented.
Research and Design of Control System for Miniature Rescue Manipulator
Authors: Zhu Li , Sun Ji Ku , Li Miao , Yang Li Song
Published: August 2013

In order to expand the visual range of the small rescue manipulator, improve the target recognition capability and solve the problem of blocking actions under the condition of keeping the control systems accuracy and stability, we designed the control system for the rescue manipulator which included ATmega16 and PC. We made wireless receiving circuit using the wireless module and the motor drive circuit using the L298N module. We also made the software system of rescue manipulator based on VC++.Experiment shows that the control system can expand the range of the environment and improve the efficiency of rescue.
Dynamic Simulation of a Passive Walking Robot with Friction and Impact
Authors: Xu Yong , Zhang Shan Ping , Song Xin Yao
Published: August 2013

This paper design an unpowered wadding duck robot based on the non-smooth dynamics as well as friction and impact effects. The duck robot can swing-roll-slip stably and periodically along the slope down without any external drives and controls. The motion characteristics of the robot are investigated and the motion parameters simulations of the passive movement gait are subsequently implemented. The time history of the dynamic parameters showed an obvious cyclical variation, which indicates the robot is able to achieve cyclical, stable passive movement.
Mechanism of Medium Pressure Difference Pipe Robot Speed Fluctuation
Authors: Cui Gao Jian , Jiang Sheng Yuan , Li Jiang Yong , Wang Wen Fei
Published: August 2013

Medium pressure type pipe robot speed fluctuation mechanism is studied. we consider that the causes of speed fluctuation are Frictional resistance mutations. Compression effect of Fluids medium and the reaction of robot speed. According to the different between the motion state of pipe robot and frictional resistance mutation trend, we make numerical simulation by using Matlab to determine the speed fluctuations law on different parameters.
Speech Recognition Based on BP Network with Improved Learning Algorithm in Application on Industrial Robots
Authors: Cui Feng , Xiong Chun Yu , Qi Feng He , Wang Chuan Ying
Published: August 2013

A three layer feed-forward neural network is developed for speech recognition for industrial robots. The signal is made up by four kinds of command sound. Based on the steepest descent method, the BP network is trained by an improved learning algorithm in which momentum factor and learning rate adjustment is adopted. The simulation results indicates that the error in classification small also with high recognition correct in terms of a percentage.
Visualization Calibration System Design of Inductive Displacement Sensor
Authors: Wan Wen
Published: August 2013

This paper describes the design of calibration system structure and program. Inductive displacement sensor calibration system based on virtual instrument is established by using LabVIEW8.5. It can complete the measured signal acquisition and calibration. In the measurement process, the inductive displacement sensor is a converter that measures a displacement and converts it into a electrical signal. By calibration, the system can be quickly translated the voltage signal into the original displacement signal. Compared with the traditional manual method, the calibration system has the advantage of simple structure and easy operation，and the visual linear fitting straight line can be obtained.
A Distribution Medium Considered Resin Flow Simulation Model for Vacuum Infusion Molding Process
Authors: Yang Rui , Li Long Tao , Zhao Yan Xin
Published: August 2013

Based on the flow characteristics of resin in fiber perform, a simulation model considering distribution medium was developed, and impregnation of fiberglass reinforced resin matrix composites was numerically simulated. The fiberglass layer thickness on VIMP microscopic impregnation was analyzed in simulation. The results show that increasing fiberglass layer thickness can reduce the flow velocity of the resin and the resin flow front profile approximates a straight line type, so the fluctuation is small, and the final product has few dry spots; reducing the glass fiber layer thickness can improve wetting speed but resin flow front profile approximates a parabolic type, so the fluctuation is large, and the final product has more dry spots, the resin flow front profile can provide guidance for prediction and optimization of the infusion process.
A GPU-Based Fault Simulator for Small-Delay Faults
Authors: Peng Ming Ming , Kuang Ji Shun
Published: August 2013

In this paper, we explore the implementation of fault simulator for small-delay faults on Graphics Processing Unit (GPU). Nowadays the size of integrated circuit is getting smaller and smaller, the clock frequency has become faster and faster, which leads to the effects of small delay fault on chip and is also increasingly obvious. Small delay simulation has become highly important, it is directly related to the accuracy of product and its time to market. At the same time, small delay simulation is a very time consuming process, which requires constantly looking for ways to accelerate the simulation. In recent years, GPU has been used to accelerate the programs of intensive computation in many areas and has achieved very good results. Based on these two points, we consider combining the parallelism of small delay simulation with the high parallel computing ability of GPU to accelerate small delay simulation. Experimental results indicate that our approach is on average 42 when compared to the traditional fault simulation engine.
Design of Monitoring System of Tunneller Based on WinCC
Authors: Song Ya Jing , Wang Shu Ping , Wang Hui
Published: August 2013

With the rapid development of national economy, the demand of coal resources is growing. The tunneller play a privotal role in the coal mining. Improving the control level of the tunneller system, it is helpful to ensure that the coal mine production is safe and efficient.
Use the Negative Feedback Theory in IC Design
Authors: Hu Rong Bin , Zhang Xiao Yin
Published: August 2013

In this paper, at first, a conceptual circuit is introduced to illuminate how to use negative feedback to set up operating points. After that, a bias circuit is design using negative feedback theory. The stimulated results show that the designed bias circuit are very stable, having a phase margin of 93.04 degrees , and that the output impedance of the bias circuits has a low pass nature with a DC value of about 5 ohms.
Application of Graph and Model Integrative Technology in Power Communication Network Management
Authors: Wang Gang , Bao Xing Chuan , Ding Jie
Published: August 2013

The graph and model integrative technology is used in the power network management. In this paper, we presented a mechanism of designing the power network management architecture with the graph theory involved. In our scheme, we describe the device topology by characteristics of node connection and port features. Then the automatic construction of the topology is focused and the system integrality is also examined. Besides, several functions are developed such as the graph editor, model storage, visualization and data analysis in power network management. The graph-based technology is applied to analyze the communication network topology. And experiment results show that it can exactly improve level of power equipment visualization.
A Universal Test Scheme for Power Conversion Embedded Control System with Full-Coverage on Inner Variables
Authors: Cai Kai , Liu Bin , Ouyang Hui , Xu Zheng Xi
Published: August 2013

Embedded system becomes one of widely-employed system schemes applied in broad areas, such as power conversion, industrial control, test and measurement, and so on. A universal test scheme with full-coverage on inner variables is present, which will improve the testability of power conversion embedded control system. Feathers of this embedded control system are introduced, and the function structure of the general test scheme is described. Some key problems of the test scheme, such as data type, variable property table, multi-type pointer array, and multi-type data packing and unpacking are discussed. Finally, the effect of the universal test scheme is testified by the implementation of a typical power conversion demonstration.
The Design of LED Intelligent Lighting Control System Based on CAN Bus
Authors: Zhang Bang Cheng , Wang Hua Zhen , Jiang Yan Qing , Hu Yan Juan
Published: August 2013

In order to meet the requirements of high stability, high vibration resistance, energy saving and environmental protection and long service life for the railway vehicle car lighting system, this paper designed a LED (Light Emitting Diode) lighting control system suitable for railway vehicles car. Using IPC for the principal computer, microcontroller for the subordinate computer, CAN bus as the communication network. Multiple brightness sensor collect the brightness information of car environment. According to the characteristics that the LED is suitable for high frequency switch power, using PWM technology, the current though the LED light can be control. ATmega16 microcontroller as the control core can automatically to adjust the brightness of the car according to the change of external environment, it ensured that the LED light emitting uniform and stable so that this kind of control system has very high application value.
Influence of Heel on Bubble Layer at the Plate Bottom
Authors: Sun Xiao Shuai , Dong Wen Cai
Published: August 2013

In order to study the influence of heel on bubble layer shape and stability, based on Fluent and Mixture model, a numerical model was established to calculate bubble layer shape at the plate bottom at different main flow velocity, air flow rate and heel degree. The influence on bubble layer shape and skin friction reduction rate caused by heel was investigated. The results show that: bubble layer at the plate bottom spreads with the inflow transversely and longitudinally. When there is heel degree, bubble layer drifts to the smaller draft side. As heel degree increases, the drift of bubble layer becomes larger and the skin friction reduction rate decreases greatly. The local skin friction even increases greatly at the plate bottom apart from the air injection board. Both local void ratio and local friction reduction rate decreases in the longitudinal direction along the plate. Local void ratio is bigger than local friction reduction rate and the difference increases in the longitudinal direction along the plate.
A New Artificial Lifting Technology for Gas Wells-Downhole Gas Compression
Authors: Liu Xiang , Qiu Zhi Chao , Zhao Chun
Published: August 2013

Downhole Gas Compression (DGC) is an entirely new powered artificial lift technology specifically for natural gas wells. The technology offers the opportunity to increase production by 30-50%, significantly improve reserves and delay the onset of liquid loading. Key application of DGC is for use in deeper partially depleted reservoir wells encountering liquid loading. The research progress of DGC is introduced in this paper and the results of theoretical and experimental study of DGC are investigated. Moreover, the adaptability and application prospect of this new technology is analyzed. There are many gas fields in China faced with problems about effective drainage and recovery enhancement, such as the mature gas fields in Sichuan and Ordos Basin. DGC will have a good application prospect in China and further study of the DGC technology is recommended.
The Effects of Environment Wind on Heat Transfer Performance of Direct Air Cooled Island and its Improvements
Authors: Gao Pei , Zhang Xue Lei , Yu Xin Wei
Published: August 2013

Using a CFD software, the numerical simulation of a 2×300MW direct air-cooled unit is done by multi-stage modeling method. the effect of the environmental wind on the heat-exchanging performance of the air-cooling island is analyzed by numerical simulation. The effects of different wind velocities and directions on exterior flow field and heat-exchanging efficiency are analyzed. The reasons of hot air recirculation and the decrease of the fans’ output are found. The heat transfer performance of air-cooled island is affected after the installation of windproof net. The result shows that the form of low-pressure area is the main reason for the hot air reflow and the decreace of the fan’s output; An improved flow field can be got after installing the windproof net. The volumetric effectiveness can be increased by 8.5% at a wind speed of 9 m/s.
Effect of Cold Rolling Strip Edge Offset on Original Shape Signal
Authors: Yang Li Po , Yu Bing Qiang
Published: August 2013

To solve the problem that two sides of strip usually cannot cover the shape measurement channel completely, an online compensatory model of error signal used for strip edge is established. Based on this model, the channel coverage of edge is able to be automatically calculated by the horizontal offset. Then, by combining proportion compensation with slope compensation, the signal error of edge shape should be compensated reasonably. This method is proved to be effective and reliable after the physical and industrial tests.
Research on RFID Applied in Warehouse Management System of Cigarette
Authors: Gao Yang Hua , Zhang Zhi Hua , Wang Huan Wen
Published: August 2013

The warehouse management system is a key part of the cigarette supply chain and controls the movement of goods within a warehouse. Having taken into account the features of cigarette warehouse management, this assay mainly introduced the basic structure and working principle of the warehouse management system based on RFID, compared the advantages of RFID with the traditional bar codes in the WMS, analyzed the managed objects and tasks in warehouse, brought forward the technological architecture and operation flow, and finally stated in detail the specific application of RFID in warehouse management system.
Research on Communication Carriers' Development in Cloud Logistics Age
Authors: Li Hong Ze , Huang Xiao
Published: August 2013

With the fantastic spur both in logistics industry and in cloud computing capabilities nowadays, communications operators have noticed that the development of communication industry is closely linked with logistics industry, who also serves as a profit of communication industry. Under the Cloud Logistics era, this paper attempts to study and give suggestions on how to develop logistics industry for communications operators. Whats more, the paper also points out that communication operators should carry out a comprehensive plan to expand its logistics business in order to make a further development.
Scale-Free Networks Based on the Value of Interest
Authors: Yang Jun Tao , Deng Hui Wen
Published: August 2013

Assigning the value of interest to each node in the network, we give a scale-free network model. The value of interest is related to the fitness and the degree of the node. Experimental results show that the interest model not only has the characteristics of the BA scale-free model but also has the characteristics of fitness model, and the network has a power-law distribution property.
Robot View Navigation Based on Level-Divided Strategy
Authors: Li Yin Bing
Published: August 2013

In allusion to the colored image matching characteristic in the system of robot view navigation, SSDA (the sequential similarity detection algorithm) is improved and adaptive genetic algorithm is brought in; meanwhile, level-divided search strategy connective with rough and exact matching. The improved algorithm can enhance the image matching speed with no matching accuracy reduced, so that real-time requirements of robot view navigation can be met and robot view navigation will be of preferable robustness.
Management System for Well-Logging Data Curves Based on Delphi
Authors: Fu Bao Hong , Cui Feng , Liu Yu , Xiong Chun Yu , Ma Jun Chi , Wang Chuan Ying , Gao Yu Kai
Published: August 2013

The system for well-logging data designed for data files unified management, can offer a function based on data query and download, also can offer instant replays for data curves. This system contains some functions following that format converting, uploading, query, download and preview for well-logging data curves. All system is designed by software Delphi GDI+.
Interdisciplinary Physical Cluster for Environmental Engineers Training
Authors: Gnitetskaya Tatyana N. , Ivanova Elena B.
Published: August 2013

A quantitative assay of interdisciplinary content of course of Physics and special disciplines studied by university students of environmental engineering specialities was carried out in the article. It was defined there are physical phenomenons, laws, theories taken as basis of special environmental engineering disciplines studied by senior students of university. A interdisciplinary physical cluster of discipline content was formed for students of environmental engineering specialities. The necessity of physics course studying prior to special discipline studying by university students of environmental engineering specialities was shown.
Study on the Mechanism of Backfill and Surrounding Rock of Open Stope during Subsequent Backfill Mining
Authors: Zhang Hai Bo , Chen Ya Jie
Published: August 2013

In order to analyze the mechanism of backfill and surrounding rock of open stope during subsequent backfill mining, take M1 ore body mining in a mine as engineering background, and simulate the mechanism of surrounding rock and backfill by using FLAC3D numerical software. Results show that the backfill can effectively alleviate or transfer the stress concentration state of the room floor and pillar, apparently restrain the displacement of the cavity plate and pillar, and improve the plasticity distribution range in a limited degree.
Low-Damage Hydraulic Fracturing Design Technique to Exploration Wells of Erlian Basin in China
Authors: Cai Bo , Ding Yun Hong , Shi Yuan Peng , Lu Yong Jun
Published: August 2013

In China,more and more low permeability reservoirs have become the mainly oil production potential part for the soaring consumer market. Hydraulic fracturing treatment has always been playing an important role in these low permeability reservoirs.however,some inappropricate fracturing designs and treatments may decrease the productions as a result of high damage within both formations and artifical fractures.In order to minimize reduce formation and fracture damage, we take the wells in Erlian Basin as an example to explain the low-damage hydraulic fracturing technique which had been used in many of oil fields .Through eight years step by step study and field application, a comprehensive industrialize design technology was put forward. By the application of this technique, the low-damage degree is highlighted compared to the past.As a result the performance of post-fracturing wells have remarkably improved.
The Application of CFRP Reinforcement Scheme in a Overpass Bridge Reinforcement Engineering
Authors: Zhao Xin
Published: August 2013

Taking a flyover as the background, this paper compares two reinforcement scheme, and ultimately chooses the paste carbon fiber polymer method to reinforce the bridge. It calculates and analyzes the structure before and after the reinforcement, then compares the stress state , shear load-carrying capacity and flexural capacity. At last ,it evaluates the effect of the paste carbon fiber polymer method and puts forward some suggestions.
Effects of Kiln Dust-Activated Coal Gangue on the Properties of High-Content Slag Cement
Authors: Wang Chun Mei , Wang Jing , Yang Li Rong , Cao Guang Dong , Dong Dan Yang
Published: August 2013

The effects of amounts of the kiln dust-activated coal gangue on the setting time and compressive strength of high-content slag cement were investigated. The performance of sulphate resistance of cement with 30 wt.% kiln dust-activated coal gangue was evaluated. The results reveal that the setting time of high-content slag cement is prolonged. Appropriate kiln dust-activated coal gangue amounts can increase the compressive strength, while too much activated coal gangue (>30 wt.%) leads to the decrease in compressive strength. Cement with 10 wt.% kiln dust-activated coal gangue exhibits a good compressive strength. The performance of sulphate resistance of Portland cement with 30 wt.% kiln dust-activated coal gangue is distinctly enhanced, while that of high-content slag cement is improved to some extent.
Effect of Corrosion on Mechanical Properties of Rebar HRB335
Authors: Wang Ying , Wang Ying
Published: August 2013

The corrosion behavior of rebar HRB335 in simulated concrete pore solution (3.5 wt.% NaCl solution) and the tensile mechanical properties before and after corrosion were investigated. The results showed that, with corrosion time increasing from 30 days to 90 days, the corrosion rate increases. With the increase of corrosion time (corrosion rate), the yield strength and tensile strength decrease, but the elongation decreases at first and then increases.
The Preparation and Micro Mechanism of Brick Materials with Iron Tailings in Tanshang Area
Authors: Liu Shu Xian , Wei Shao Bo
Published: August 2013

This paper discussed the experimental results of exploiting brick materials with iron tailing materials in Tanshang area. Through preparation of iron tailing bricks, the technical flow and production proportion was obtained. The results show that a burning-and steam curing-free brick product with a compressive strength of 28.30 MPa and Flexural strength of 5.63 MPa as the following: iron tailing; fly ash; sand; CaO; gypsum; cement. And long-term properties of a burning-and steam curing-free brick is also studied by experiments in this paper. Put forward a new technique of making materials with iron tailing. At the same time, the micro mechanism of iron tailing brick was also studied with X-Ray Diffractometer (XRD) and Scanning Electron Microscope (SEM).
Effect of Hydrogen Addition on Reduction of Sinter
Authors: Li Xiang Wei , Chen Ling Kun , Wang Wei
Published: August 2013

High level coal injection increases hydrogen of the gas in the blast furnace shaft, which changes the reduction behavior of sinter. This paper investigates the effect of hydrogen addition on reduction of sinter. Experiments of the sinter reduction in different content of hydrogen had been made. The experimental results show that the reduction rate increases with the hydrogen content increase in the reducing gas.
Selecting Warm Mix Asphalt (WMA) Additives by the Properties of WMA Binders
Authors: Shi Peng Cheng , Xie Zhao Xing , Fan Wen Zhong , Wang Li Li , Shen Ju Nan
Published: August 2013

The objective of this research was to investigate the influence of WMA additives on the properties of WMA binders through a series of laboratory testing such as viscosity, penetration, ductility, and softening points on the binders. The experimental design included the use of three WMA additives of Sasobit, Rediset, and Evotherm at a recommended content of 2, 2 and 0.6% respectively, two base binder sources, and one modified binder sources. The properties of WMA binders were compared to those of original asphalts without the additives as controls. Results from this study showed that: (1) Three WMA additives of Sasobit, Evotherm and Rediset increased the dynamic viscosity (60°C) of asphalt binders; (2) The additives of Evotherm and Rediset reduced the kinematic viscosity (130°C) of tested WMA asphalt binders. Adding 2 % Sasobit did not affect the kinematic viscosity; (3) Adding 2 % Sasobit reduced the penetration of WMA asphalt binder obviously. The most reduced rate of penetration is 22.7 % for SK base asphalt binder; (4) The WMA additives increased the softening point of WMA asphalt binders, except for the case with 0.6 % Evotherm. The effect of adding 2% Sasobit on the softening point of asphalt binders is the most significant, while the effect of adding 0.6 % Evotherm is the least; (5) adding 0.6 % Evotherm increased the ductility of warm asphalt binders by 28.6 %, while adding 2 % Sasobit reduced the ductility of warm asphalt binders obviously.
The Effect of the Filling Caves on Loess Slope Stability in Irrigation
Authors: Liang Yan , Liu Chao , Li Tong Lu , Li Ping
Published: August 2013

Landslides are serious geological disasters in loess areas. In order to study the effect of the filling caves in the edge of loess tableland on loess slope stability, the slope stability of sliding from the caves was calculated in irrigation when caves were filled with compacted soil, lime soil, lime-ash soil and non-filled. The results show when caves are filled with lime soil the slope stability is the highest. The effects of variability of the physical and mechanical property indexes of caver filler on loess slope stability were researched further. The results show that (1) the variation coefficients of unit weigh and the shear strength indexes of cave filler lime soil have small effect on the average value of safety reserve, but have big effect on the standard deviation of safety reserve, which explains that the design risks increase while the variation coefficient increasing. (2) with the increase of variation coefficients of unit weigh and the shear strength indexes of cave filler the failure probability increases. Especially when variation coefficient is bigger than 0.3, the failure probability of loess slope is very sensitive to variation coefficient. (3) the effect of correlation coefficient among unit weight and the shear strength indexes of cave filler on failure probability increases with the variation coefficient increasing. It is very important to guarantee filling project. Good quality of filling construction will decrease the variability of cave filler, heighten the stability of loess slope, and decrease the occurrence of loess disasters.
Study on Seismic Performance of a Two-Bay Two-Story RCF with Construction Joint under Low-Reversed Cyclic Loading
Authors: Yan Xi Kang , Ma Kang , Dong Cheng , Wang Lei , Chen Pei
Published: August 2013

Based on experiment of a two-bay two-story reinforced concrete frame with construction joint under low-reversed cyclic loading, hysteretic performance, displacement ductility, bearing capacity degeneration, rigidity degeneration, energy dissipation and displacement restoring capacity are studied systematically. The studies show that the frame with construction joint has not better seismic performance than the monolithic cast frame.
The Research Status of Fireproof Materials in China
Authors: Chen Rui Feng , Gu Hua Liang , Jia Yi Ming
Published: August 2013

Given the fire accidents in recent years, we should placed great importance on the fireproof materials of buildings except arson. This paper summarized the research status methods and distinguishing features of fireproof materials in China which would make progress to our research on fireproof materials.
Flexural Wave Propagation Characteristics of Lattice Sandwich Plates
Authors: Tao Shu Lang , Yu Gui Lan , Yao Zong Jian
Published: August 2013

This paper is aimed to study flexural wave propagation characteristics of lattice sandwich plates. Based on Blochs theorem, band structure of flexural wave propagation in the plate is obtained by commercial finite element software Comsol Multiphysics. Meanwhile, frequency response is obtained and its maximum attenuation is exactly corresponding to the band gaps. Finally, effects of lattice pattern on band gaps are introduced.
Exploration of the Modeling Process of Assembly Based on MBD and Pro/ENGINEER
Authors: Wang Li Xin , Guo Ming Yue , Guo Yu
Published: August 2013

The 3D (three dimensional) assembly model should provide all of the product information in order to realize pure 3D modeling in PLM(Product Lifecycle Management). This paper briefly introduces the development of MBD (Model-based Definition) at first, and then the overall information needed in 2D (two dimensional) assembly drawing is presented. At last, the overall needed information (dimensions, technical requirement, BOM(Bill of Materials)) is acted upon 3D assembly model successfully through the use of functions, for example, annotation, layer and view in Pro/ENGINEER.
Heterogeneous Turbine Blade Modeling Based on Multi-Color Distance Field
Authors: Zhou Hong Mei , Qin Ge
Published: August 2013

In heterogeneous turbine blades, multiple materials can be synthesized to provide better properties than any single material. In this paper, a new method for turbine blade modeling toward reverse engineering, termed as multi-color distance field, is presented. In this method, the material field describing the material composition continuous or discontinuous variation is associated with the signed distance field describing the geometry model. The method allows the designers to design and optimize no only the geometry but also the material composition of an object. Moreover, both the geometry model and the material information can be easily sliced to manufacture for the object represented using the associated multi-color distance field.
Dynamic Characteristic Simulation and Analysis of Blade Flutter Based on Finite Element
Authors: Zhu Li Da , Liu Wen Wen , Wu Ji Jiang , Xu Shuai , Su Peng Cheng
Published: August 2013

Blade is one of the main parts of aircraft engine. Its dynamic characteristics will produce important influence on the work efficiency and the operation reliability of the turbine engine. The paper used the theory of finite element to do modal simulation analysis on the dynamic characteristic of blade flutter, aiming at the phenomenon of serious blade vibration in the process of turbine engine running. Firstly, the paper generated a three-dimensional model by using the software UG. Then the three-dimensional model was leaded into the finite element analysis software ANSYS. Simulation analysis of the model was carried out by using the Workbench module of ANSYS software. Finally, we got the former six order natural frequencies and vibration modes of the blade. In addition, we got the blade's vibration characteristics. The results of the simulation could provide numerical basis for the blades optimization design and vibration safety inspection.
Analysis of a strong wildfire event over Valencia (Spain) during Summer 2012 – Part 1: Aerosol microphysics and optical properties
Authors: Gómez-Amo J. L. , Estellés V. , Segura S. , Marcos C. , Esteve A. R. , Pedrós R. , Utrillas M. P. , Martínez-Lozano J. A.
Published: August 2013

Abstract. The most intense wildfire experienced in Eastern Spain since 2004 happened in Valencia during summer 2012. Although the fire was mostly active during days 29–30 June, a longer temporal period (from 24 June to 4 July) was selected for this analysis. Column-integrated, vertical resolved and surface aerosol observations were performed continuously at the Burjassot station throughout the studied period. The aerosol optical depth at 500 nm shows values larger than 2 for the most intense part of the wildfire and an extremely high maximum of 8 was detected on 29 June. The simultaneous increase of the Ångström exponent was also observed, indicating the important contribution of small particles in the smoke plume. An extraordinary increase in the particle concentration near the ground was observed and hence the measured scattering coefficient was drastically enhanced. The scattering coefficient and the PM2.5 level maxima reached the unusually high values of 2100 Mm−1 and 160 μg m−3, respectively. These records represent an enhancement factor of 26 and 7 with respect to the climatological averages found in this station during June and July. The surface maxima were observed with 1-day lag from the maximum AOD, and this fact is linked with the mixing layer amplitude and the sedimentation of smoke particles. The aerosol microphysical parameters and optical properties were determined for the whole period by combination of an inversion procedure and the Mie Theory. The smoke particles enhanced drastically the volume concentration of the fine mode with a maximum of 0.4 μm3 μm−2, which is 10 times higher than the climatological summer background in this site. The simultaneous presence of dust and smoke particles at different altitudes was observed and hence the coarse mode was also significant during the most intense period of the wildfire episode. Therefore the aerosol single scattering albedo and the asymmetry parameter obtained during the smoke cases display high variability which is partially modulated by the volume of coarse particles. The smoke episode highly contributed to increase the load of particles remaining in the atmosphere after the event, especially in the fine mode, although similar aerosol microphysical and optical properties were observed before and after the event. In addition, the particle concentration observed at surface level due to the wildfire episode largely contributes to exceed the EU annual limits for the particulate matter in the studied region.
Two-Dimensional Modelling and Validation of the Mass Flow in a Mixing Stirred Reactor
Authors: Kladeková Daniela , Oriňáková Renáta , Wiemhöfer Hans-Dieter , Krajníková Annamária , Oriňák Andrej
Published: August 2013

The present work focuses on the computational modelling of fluid flow in a mixing stirred reactor to describe the flow pattern in two-dimensional (2D) detail, which can be useful for optimizing the parameters of electroplating for the production of a uniform film on metallic particles in a stirred electrolytic cell.

The results of modelling and simulation show that the electrolytic cell geometry and the presence of a solid electrode affect the streamline distribution. The most important parameter affecting the fluid flow is not just the position but also the size of the stirrer as well. It is concluded that the “high cell” with the “big stirrer” can be used for the electroplating of iron micro-and nanoparticles in the presence of the cylindrical electrode.
Estudo de falhas em rolamentos provenientes de tensões e correntes parasitas utilizando o sensor Shaft Probe
Authors: Brito Jorge Nei , Lamim Filho Paulo Cezar Monteiro , Christoforo André Luis
Published: August 2013

Neste trabalho é apresentado um estudo de falhas em rolamentos provenientes de tensões e correntes parasitas que circulam no eixo do motor utilizando o sensor shaft probe. A análise de tensão e corrente parasita é uma técnica preditiva, recentemente lançada no mercado. O sensor é apoiado no eixo do motor e os sinais são coletados através do coletor/analisador de dados UltraSpec 8000. Os testes foram realizados em uma bancada onde os diferentes níveis de tensões e correntes foram introduzidos no rolamento dianteiro de um motor elétrico. Um gerador de corrente contínua acoplado ao motor, através de um acoplamento flexível, foi usado como sistema de carga. O objetivo é conhecer os níveis das amplitudes de tensão e corrente nos rolamentos, permitindo uma vida útil maior. A análise de vibração, por ser uma técnica preditiva tradicional, também foi utilizada para validação dos testes experimentais.
Solar Flares
Authors: Butler Andrew M.
Published: August 2013

Science fiction produced in the 1970s has long been undervalued, dismissed by Bruce Sterling as “confused, self-involved, and stale.” The New Wave was all but over and Cyberpunk had yet to arrive. The decade polarised sf – on the one hand it aspired to be a serious form, addressing issues such as race, Vietnam, feminism, ecology and sexuality, on the other hand it broke box office records with Star Wars, Close Encounters of the Third Kind, Alien and Superman: The Movie. Across the political spectrum, writers perceived a series of invisible enemies: radicals addressed the ideological structures of racism, sexism, homophobia, colonialism, pollution and capitalism and the possibility of new social structures, whereas conservatives feared the gains made by the civil rights movement, feminism, gay liberation, independence movements, ecology and Marxism and the perceived threats to the nuclear family. Sf would never be the same again. Beginning with chapters on the First sf and New Wave authors who published during the 1970s, Solar Flares examines the ways in which the genre confronted a new epoch and its own history, including the rise of fantasy, the sf blockbuster, children’s sf, pseudoscience and postmodernism. It explores significant figures such as Joanna Russ, Samuel R. Delany and Octavia Butler. From Larry Niven’s Ringworld to Thomas M. Disch’s On Wings of Song, from The Andromeda Strain to Flash Gordon and from Doctor Who to Buck Rogers, this book reclaims seventies sf writing, film and television – alongside music and architecture – as a crucial period in the history of science fiction.
Estrutura e posicionamento estratégico da indústria de vinhos de mesa do Rio Grande do Sul
Authors: Moreira Thomé Rosana Beatriz , Hexsel Astor Eugênio , De Toni Deonir , Sperandio Milan Gabriel
Published: August 2013

Este estudo tem o objetivo de descrever e analisar a estrutura e os posicionamentos estratégicos no segmento de vinhos de mesa da indústria vinícola do estado do Rio Grande do Sul {RS). Por meio da análise de dados secundários e do método de estudo de casos múltiplos, foram conduzidas entrevistas semiestruturadas em oito vinícolas. Os resultados mostram que o segmento de vinhos de mesa no Brasil representa cerca de 70% do total de vinhos comercializados em 2007. O Rio Grande do Sul se destaca como o principal estado vitivinicultor, e o setor constitui um importante polo de desenvolvimento econômico, sendo responsável por cerca de 60% da área plantada com videiras, 50% da produção de uvas e mais de 90% da produção vinícola nacional. Identificou-se, nesse segmento, forte concorrência, decorrente da baixa diferenciação dos produtos, baixas barreiras à entrada, forte poder de negociação dos clientes, especialmente dos supermercados, e a significativa ameaça dos importados. Optou-se por analisar o processo competitivo com base em grupos estratégicos: o Grupo 1, com vendas predominantemente a granel; o Grupo 2, com vendas predominantemente do produto engarrafado; e o Grupo 3, com vendas do vinho tanto a granel quanto engarrafado. A compreensão desse segmento da indústria vinícola possibilitou descrever as suas principais características e o posicionamento estratégico das empresas presentes nesse mercado.
The role of remote ischemic preconditioning in the treatment of atherosclerotic diseases
Authors: Vasdekis Spyros N. , Athanasiadis Dimitrios , Lazaris Andreas , Martikos Georgios , Katsanos Aristeidis H. , Tsivgoulis Georgios , Machairas Anastasios , Liakakos Theodoros
Published: August 2013

Background

Remote ischemic preconditioning (RIPC) is the application of a transient and brief ischemic stimulus to a distant site from the organ or tissue that is afterward exposed to injury ischemia, and has been found to reduce ischemia–reperfusion injury (IRI) in various animal models. RIPC appears to offer two distinct phases of endothelial IRI protection, which are presumably mediated through neuronal and humoral pathways.

Methods

We conducted a comprehensive literature review on the available published data about the potential effect of RIPC in patients undergoing IRI in one or more vital organs.

Results

Our search highlighted 24 randomized clinical trials about the effect of RIPC on variable clinical settings (abdominal aortic aneurysm repair, open heart surgery, percutaneous coronary intervention, living donor renal transplantation, coronary angiography, elective decompression surgery, carotid endarterectomy, recent stroke, or transient ischemic attack combined with intracranial carotid artery stenosis). Most of the trials focused on postoperative cardiac or renal function after RIPC with conflicting results. Preconditioning protocols, age limits, comorbidities, and concomitant drug use varied significantly across trials, and therefore no firm conclusions can be drawn using the available data. However, no severe local adverse events were observed in any patient undergoing limb or arm preconditioning.

Conclusions

RIPC is a safe and well‐tolerated procedure that may constitute a potentially promising innovative treatment in atherosclerotic diseases. Large, multicenter, randomized clinical trials are required to determine an optimal protocol for the RIPC procedure, and to evaluate further the potential benefits of RIPC in human ischemic injury.
ChemInform Abstract: An Efficient, Thermally Stable Cerium‐Based Silicate Phosphor for Solid State White Lighting.
Authors: Brgoch Jakoah , Borg Christopher K. H. , Denault Kristin A. , Mikhailovsky Alexander , DenBaars Steven P. , Seshadri Ram
Published: August 2013

Polycrystalline samples of Ba9 (Y1‐xCex)2Si6O24 (x = 0—0.12 in steps of 0.02) and Ba9 (Y1‐yScy) 1.94Ce0.06Si6O24 (y = 0.05—0.25 in steps of 0.05) are prepared by solid state reaction of stoichiometric mixtures of BaCO3, Y2O3, Sc2O3, SiO2, and CeO2 (5% H2/N2 atmosphere, 1350 °C, 4 h).
ChemInform Abstract: Visible‐Light‐Responsive β‐Rhombohedral Boron Photocatalysts.
Authors: Liu Gang , Yin Li‐Chang , Niu Ping , Jiao Wei , Cheng Hui‐Ming
Published: August 2013

Commercially available β‐rhombohedral boron crystals (sub‐micrometer‐ and micrometer‐sized) with and without an amorphous oxide layer on their surface are photocatalytically active under visible light irradiation as evidenced by their ability to generate OH radicals in terephthalic acid suspensions.
ChemInform Abstract: LiBSi2: A Tetrahedral Semiconductor Framework from Boron and Silicon Atoms Bearing Lithium Atoms in the Channels.
Authors: Zeilinger Michael , van Wuellen Leo , Benson Daryn , Kranak Verina F. , Konar Sumit , Faessler Thomas F. , Haeussermann Ulrich
Published: August 2013

The title compound is obtained from an equimolar mixture of LiB and Si under high pressure/high temperature conditions (10 GPa, 900 °C, 1 h, yield given in g).
ChemInform Abstract: Na11B21O36X2 (X: Cl, Br): Halogen Sodium Borates with a New Graphene‐Like Borate Double Layer.
Authors: Pan Shilie , et al. et al.
Published: August 2013

Single crystals of the title compounds are prepared by the spontaneous crystallization method from mixtures of NaOH, NaBr or NaCl, and H3BO3 in the molar ratio of 1:1:2 (Pt crucible, 300 °C for 12 h and 500 °C for 10 h).
ChemInform Abstract: Preparation of Diastereomerically Pure and Mixed (S)‐PhGly/BIPHEP/Ru(II) Complexes and Their Catalytic Behavior with Li2CO3 in Asymmetric Cyanosilylation of Benzaldehyde.
Authors: Kurono Nobuhito , Katayama Taiki , Ohkuma Takeshi
Published: August 2013

The title Ru(II)‐catalyst systems exhibit excellent reactivity and enantioselectivity for asymmetric cyanosilylation of benzaldehyde.
ChemInform Abstract: Direct Catalytic Asymmetric Mannich‐Type Reaction of α‐Sulfanyl Lactones.
Authors: Takechi Sho , Kumagai Naoya , Shibasaki Masakatsu
Published: August 2013

A catalytic asymmetric Mannich‐type reaction of α‐sulfanyl lactones and aldimines promoted by a soft Lewis acid / hard Broensted base cooperative catalyst is described.
ChemInform Abstract: Breaking the Ring Through a Room Temperature Catalytic Wittig Reaction.
Authors: O'Brien Christopher J. , Lavigne Florie , Coyle Emma E. , Holohan Andrew J. , Doonan Bryan J.
Published: August 2013

First time, acyclic phosphine oxides are used as catalysts for catalytic Wittig reactions under improved reaction conditions.
ChemInform Abstract: Palladium‐Catalyzed Synthesis of Substituted Nitroolefins.
Authors: Chang Meng‐Yang , Lin Chung‐Han , Tai Hang‐Yi
Published: August 2013

A one‐pot two‐step procedure is developed for the synthesis of a wide variety of nitroolefins via triflation of ketones and subsequent Pd‐catalyzed coupling of the enol triflates with NaNO2.
ChemInform Abstract: Highly Diastereo‐ and Enantioselective Allylboration of Aldehydes Using α‐Substituted Allyl/Crotyl Pinacol Boronic Esters via in situ Generated Borinic Esters.
Authors: Chen Jack L.‐Y. , Scott Helen K. , Hesse Matthew J. , Willis Christine L. , Aggarwal Varinder K.
Published: August 2013

The reaction conditions (three‐step vs.