bluuebunny/crossref_metadata_2025 huggingface dataset:
The Comparison and Analysis of Fiber Grating Strain Sensor and Resistance Strain Slice for Transmission Tower Vibration Monitoring
Authors: Geng Jin Feng , Ma Dong Fang , Cai Hong Sheng , Wu Wen Tao , Dong Jun Wei , Shen Xiao Huan
Published: February 2014

Contrast advantages and existing problems of resistance strain slice and fiber grating strain sensor for tower vibration strain monitoring, compare the structure of the two, and do the on-site installation and experiments, analyze the monitoring data. It can make a conclusion that the properties of fiber bragg grating strain sensors are basic consistent with resistance strain slice. And fiber bragg grating strain sensors can be used for transmission tower vibration monitoring .
Fuzzy Attribute Reduction Based on Fuzzy Similarity
Authors: Liu Xiao Jing , Du Wei Feng , Min Xiao
Published: February 2014

The measure of the significance of the attribute and attribute reduction is one of the core content of rough set theory. The classical rough set model based on equivalence relation, suitable for dealing with discrete-valued attributes. Fuzzy-rough set theory, integrating fuzzy set and rough set theory together, extending equivalence relation to fuzzy relation, can deal with fuzzy-valued attributes. By analyzing three problems of FRAR which is a fuzzy decision table attribute reduction algorithm having extensive use, this paper proposes a new reduction algorithm which has better overcome the problem, can handle larger fuzzy decision table. Experimental results show that our reduction algorithm is much quicker than the FRAR algorithm.
Dynamic Construction of Voronoi Diagram for a Set of Points and Straight Line Segments
Authors: Liu Xin
Published: February 2014

Voronoi Diagram for a set of points and straight line segments is difficult to construct because general figures have uncertain shapes[. In traditional algorithm, when generator of general figure changes, production process will be extremely complex because of the change of regions neighboring with those generator changed. In this paper, we use dynamicconstruction of Voronoi diagrams. The algorithm can get over all kinds of shortcomings that we have just mentioned. So it is more useful and effective than the traditional algorithm[2]. The results show that the algorithm is both simple and useful, and it is of high potential value in practice.
Dynamics Analysis of Drag Rope Base on Lagrange Equation
Authors: Sheng Fu Shen , Hu Jie Hua
Published: February 2014

Drag rope is a kind of soft body. Now the analysis method of rigid-Body mechanics is not suitable for drag rope mechanics to analysis. This paper compares the two branches of the theoretical mechanic, who are the vector mechanics and the analysis mechanics, then put forward a kind of mechanical analysis method which uses the Lagrange-equation which belongs to the analysis mechanics, to analysis the movement and stress of drag rope.
Integrated Automation System Using Information Fusion Techniques
Authors: Quan Hong Wei , Li Wan Bing
Published: February 2014

More and more problems emerged in integrated automation system such as data processing, database information integration, and decision supporting and fault diagnosis. Information fusion technology is currently a front research topic in the field of information processing. The application of information fusion in above four aspects suggests its an effective method to solve the problems in integrated automation system. Information fusion technology will get more widely applications in integrated automation system.
Firefighting Tactics during a Fire Event at a Textile Factory
Authors: Lin Cherng Shing , Lai Chih Chung , Wu Ming En , Yu Chia Chun
Published: February 2014

Many factories contain chemical substances, raw materials, and finished and semi-finished products; thus, a factory fire can cause substantial property losses and endanger lives. The Fire Dynamics Simulator (FDS) developed by the National Institute of Standards and Technology was used in this study to simulate a fire event at a textile factory in Taiwan. The circumstances of a 2010 fire event in Zhubei City were recreated using data from the fire department and print media, exploring changes in temperature, smoke, and the concentrations of harmful gases (i.e., carbon monoxide; CO). Criteria were established for judging the firefighting techniques used during the fire event. In other words, simulated results of the FDS were used to analyze and assess the planning and use of firefighting tactics to enhance the efficiency of firefighting and rescue techniques, decrease casualties and property losses, and increase the reference value of this study in its application to fighting future factory fires.
The Comparison Mechanics Analysis of Two Simplified Models about Elevator Bearing Beam
Authors: Zhang Zhi Hong , Ni Xi Li , Zheng Yu Qing , Zhang Xu
Published: February 2014

It discusses two simplified elevator bearing beam models that describe the design installation way usually and the on-site installation way respectively for the elevator’s traction machine. Taking a real 12-ton traction elevator as an example, it analyzed the load force on the bearing beam, and also used finite element analysis software ANSYS12.0 to calculate their stress situation of two simplified models. Then it compares the bearing beam strength and stiffness influences based on two different fixed ways. Finally, it suggested a conductive advice to make more reasonable choice to install the bearing beam for elevator safety.
Risk Mutability Analysis and Pre-Control of Dynamical System
Authors: Qi Ji , Zheng Zhong Yi , Li Jian Min
Published: February 2014

Based on systematical research on catastrophe theory, system dynamics is a general theory to describe dynamical systems with the goal of achieving structural stability and dynamic stability. In this paper, catastrophe model of dynamic system is established and elements of the system are defined as well. Conditions for system structure mutating are also defined via analysis on dynamism, fuzziness and mutability of system structure. In view of the fact that modes and strength of disturbance or damage to system structural stability are two decisive factors for major accident occurrence and consequences, the course of disturbance or damage can be deemed as the process of quantitative evaluation of major accident risks. Hence, by adopting combination of qualitative and quantitative methods and with the help of simulation technology, decision-makers can do researches on engineering, social and economic systems to make scientific and effective pre-control.
3D Texture Analysis of Corpus Caliosum Based on MR Images Inpatients with Alzheimer’s Disease and Mild Cognitive Impairment
Authors: Liu Wei Fang , Wang Xu , Xia Hong
Published: February 2014

This study investigated three-dimensional (3D) texture as a possible diagnostic marker of Alzheimers disease (AD). Methods: T1-weighted MRI of 18 AD patients, 18 Mild Cognitive Impairment (MCI) patients and 18 normal controls (NC) were selected.3D Texture parameters of the corpus callosum,including contrast, inverse difference moment , entropy, short run emphasis, long run emphasis, grey level nonuniformity, run length nonuniformity and fraction were extracted from the gray level co-occurrence matrix and run length matrix. Finally statistic significance was tested among three groups, and the correlations between parameters and Mini-Mental State Examination (MMSE) scores were calculated. Results: The results showed that the 3D texture features had significant differences (p<0.05) among three groups except grey level nonuniformity and run length nonuniformity that the difference was not significant (p>0.05) between MCI and NC or AD and MCI , and they were correlated with MMSE scores.Conclusions: 3D texture analysis can reflect the pathological changes of corpus callosum in patients with AD and MCI, and it may be helpful to AD early diagnosis.
Application of the Projection Pursuit Regression in Forecasting the Pressure of the Torpedo Launch Tube
Authors: Zhang Ling , Dong Yu Cai , Lu Bao Hong , Fan Ge Hua
Published: February 2014

Through the relation among the pressure of the torpedo launch tube, cylinder volume, cylinder pressure and emission valve size, we adopt the projection pursuit regression method and establish the model to predict the pressure of the torpedo launch tube. Through the comparison of experiment data and model prediction, fitting accuracy of this relation model is higher than that of the partial least-squares regression method and linear regression model and the projection pursuit regression is an efficient method which can research the initial ballistic trajectory of ship launched torpedoes.
Information Integration System and its Implementation Based on Semantic
Authors: Huang Gang , Wu Xiu Ying , Yuan Man
Published: February 2014

Due to information integration system is a need to focus on different periods independently designed data sources and a unified information system to provide their data to the end user, so it will inevitably encounter data changes over time to bring the knowledge of information contained, the concept will be certain changes in circumstances occur. This paper analyzes the semantic-oriented information integration systems and solutions proposed to consider the full range of semantic information integration problems at different stages of the primary purposes of information integration systems.
Cloud Storage and Security Technology in the Application of the Internet Things
Authors: Liang Xiao Yang , Zhang Lin
Published: February 2014

This paper proceeds as follow, the architecture model based on cloud storage and cloud storage of key technologies, from the availability, reliability and data sharing three aspects analysis the feasibility of the combination of cloud storage and Internet of things, cloud storage are discussed under the Internet environment facing security problems and the corresponding solutions and Internet of things under the environment of cloud storage platform structure model, and the cloud storage in the Internet of the future development trend is prospected.
Green Textiles of Traditional Banana Leaft Folding Techniques
Authors: Khumsingha Uraiwan
Published: February 2014

Cotton (Gossypium spp.) is an important cash fiber crop belonging to the family malvaceae. The objective of this research is to develop women wears from hand-woven cotton with banana leaf folding techniques, which is a Thai Art and Craft tradition. The most of the Thai used banana leaf for everyday life such as a food packaging or worshiping Buddha. From this reason, the research is to create a special collection of 5 dresses with the banana leaf folding. The research is conducted by measuring a percentage and using questionnaires to a target group of 100 samples. The result has shown that the first designHua nok kor yak is of the highest satisfactory which is about 88.4%. The collection of hand-woven cotton combined with elaborate parts is added-value to Thai clothing and promotes Arts and Craft of Thai tradition to international markets.
Pinning Control of Enterprise Marketing Network Based on Complex Network Theory
Authors: Qin Xiao Hong , Ge Wei
Published: February 2014

Complex enterprise marketing network is typical scale-free network. Based on the non-uniformity of enterprise marketing network topology, we select pinning control strategy. There are network members for selection a certain percentage to exercise control, to use of virtual control action associated with the coupling between network members, making large-scale enterprise marketing network reaches a steady state. Paper showed that pinning control is effectiveness to control of enterprise marketing for network.
Simulation on Development of Manufacturing Industry
Authors: Liu Bo Nan , Yuan Jing Han
Published: February 2014

This paper simulates the impact of industrial development on the manufacturing from the perspective of sustainable development. We discussed the industrial development and environmental changes and the results show that industrial waste and pollution levels are gradually slowing down towards improvement, the results show that the reducing the amount of industrial wastewater discharge may strengthen the implementation of environmental policy and industrial wastewater treatment investments related, and there are signs of a rebound and volatility.
Evaluation of Professional Internships of Road and Bridge Specialty
Authors: Xia Xiao Hui
Published: February 2014

Today, high-speed development of hardware, software technology and project construction for the system will provide the technical conditions. This paper uses the Analytic Hierarchy Process (AHP) method designed scientific internships student achievement and the quality of road and bridge specialty internships and mentoring quality evaluation system.
An Approach for Sugar Equipment Optimal Model Based on Multiple Fields Synergy
Authors: Lu Fu Ning , Yu Xian , Meng Yan Mei , Wang Xiao Chun , Tang Zhi Hong , Chen Jian
Published: February 2014

In cane sugar production field, there are a few indexes should be highlighted, which are the product quality, refining efficiency, sugar boiling time and heat transfer performance. And those indexes are all related to the massecuite circulation flow. With the goal of better sugar production, this paper developed a model for optimal global coordination of all the sugar boiling facilities based on the multiple coupling synergies of the sugar boiling system. With a synergy solver developed by knowledge base and data base, the model solution was yielded. Emulation and experimental results showed that the higher synergy of all multiple fields, the better was the massecuite circulation flow. In other words, the optimal solution this paper yielded could result the higher production of sugar and more identical size of the sugar crystals.
The Establishment and Analysis of the Radiation Noise Model of the Ventilator Enclosure
Authors: Xie Hang Sheng
Published: February 2014

The radiation noise of the ventilator enclosure is mainly caused by the vibration of the enclosure. It is not easy to calculate and measure. By analyzing the reasons for the radiation noise of the ventilator enclosure, this paper establishes the noise model, uses a series of numerical processing techniques, and overcomes the past complexity and diversity of the numerical solution. By means of the model verification, the comparison between the numerical solution and the measured value shows that this method can be used to calculate some complex noise power.
Optimization Design of 'Carbon Steel Heat-Treatment' Experimental Education
Authors: Wang Zhi Gang , Shi Lei , Wang Xian Zhong , Xu Yong , Sun Qi Lei
Published: February 2014

In this work, the educational mode and methods are systematically considered and optimized from the aspects of experimental contents, experiments process and evaluation forms. The experimental teaching procedures are extremely enriched. Furthermore, the interest and enthusiasm of students are greatly improved, as well as the cognitive competence, innovativeness and team spirit. As a result, the teaching effects are dramatically improved.
Research and Exploration of Cultivating College Students' Innovative and Practice Ability
Authors: Li Bing , Liu Xiao Ming
Published: February 2014

Traditional practice teaching has many disadvantages, especially the lack of the cultivation of the college students innovative ability. Under the drive of the new situation, to study and exploring practical teaching, through the practice of the new teaching and stimulate students interest in learning,cultivate students' project ability to demand analysis, general design and detailed design, at the same time, it can improve the students' team spirit and innovation ability.
Multi-Objective Fuzzy Optimization Design of Gear Drive
Authors: Liu Xiao Xing , Pan Qi Ying
Published: February 2014

fuzzy factors in the gear reducer design are analyzed, and a multi-objective optimization model with minimum volume and maximum bearing capacity is established in this paper. Optimal level cut-set method is introduced to conduct comprehensive evaluation on constraining fuzziness and convert the fuzzy constraint into general constraint according to the actual conditions and requirements; for multi-objectives, single-objective optimal solutions are fuzzified to form fuzzy sets to establish the membership functions of the fuzzy sets by taking the fuzziness between the single objectives and between the single objectives and multiple objectives into consideration, and multi-objective optimal solutions are obtained by maximizing the membership functions of the fuzzy set intersection. For an actual gear reducer, the fuzzy theory and method are applied to obtain results, and the validness of the method is demonstrated by comparing such results with the conventional design data.
Study on the Structure Design and Material Evaluation of Rural Residential Roof in Northeast China
Authors: Liu Jun , Lin Fang Zhi , Huang Zi Yan , He Bin
Published: February 2014

Base on current status of rural residential roofs in northeast China, in order to improve and ensure the qualities, safety and functions of flat roofs in this region, this paper first put forward the “rural secure flat roof”, then according to the weather characteristic and the needs of residents, proceeded the construction design of rural secure flat roof. Finally established the comprehensive evaluation system and used VRS model to evaluate several common roofing insulation materials. Results show that hydrophobic expanded perlite, rock wool and glass wool can be the ideal roofing insulation materials. The research on construction design and material evaluation is significant on promoting the functions and safety of rural residence.
Quantification and Evaluation of System Grounding and Electric Bonding Performance
Authors: Hu Xiao Dong , Li Li , Tian Jin
Published: February 2014

The grounding performance plays a very important role on system level EMC. This paper puts forward several key indicators that can greatly affect grounding performance. According to the characteristics of each kind of original data, fuzzy clustering method is adopted to quantify it. Then, based on the method of TOPSIS (Technique for Order Preference by Similarity to Ideal Solution), closeness degree model is established to achieve the comprehensive evaluation of the system grounding performance.
Passive Damage Detection of Natural Fibre Reinforced Composites Using Sensor Response Data
Authors: Zaleha M. , Mahzan Shahruddin , Idris Maizlinda Izwana
Published: February 2014

This paper presents the detection of impact damage in a natural fibre reinforced composite plate under low velocity impact damage. Lead Zirconate Titanate (PZT) sensors were placed at ten different positions on each plate in order to record the response signals. The response signals captured from each sensor were collected for impacts performed by a data acquisition system. The impacted plates were examined with optical microscope to examine the damaged areas. It was found that the damaged size grew proportionally with impact force. The results also revealed that PZT sensors can be used to detect the damage extent with the waveform of sensor signals implying the damage initiation and propagation which detected above the damage force of 150N.
Properties of Alpinia galanga Agro-Waste-HDPE Composites with Addition of MA-g-PE and Eco Degradant
Authors: Binti Mustapha Rohani , Awang Mohamad , Ali Asmadi , Noraaini Ali , Mohd Aidil Adhha Abdullah
Published: February 2014

Preparation of Alpinia galanga agro waste-high density polyethylene (HDPE) composites involved the addition of eco degradant and polyethylene-g-maleic anhydride (PE-g-MA). The Alpinia galanga agro waste fibers at 3, 6, 10 and 15 wt% were compounded in an internal mixer with the addition of 5 wt% MA-g-PE and eco degradant. The composite specimens were prepared using an injection molding machine. The results show that the maximum tensile strength of 33 MPa was obtained for sodium hydroxide (NaOH) & 3-aminopropyltriethoxysilane (3-APE) treated fiber composites with eco degradant and MA-g-PE at 15 wt% fiber loading compared to that of pristine HDPE (28 MPa). All the treated composites show an improvement in tensile strength. This indicates that the treatments using NaOH&3-APE and p-toluenesulfonic acid (PTSA) with addition of eco degradant and PE-g-MA improved adhesion between Alpinia galanga fiber and HDPE matrix. The Scanning Electron Microscopy (SEM) micrographs show the presence of a improved interaction between treated Alpinia galanga fibers and HDPE matrix with the addition of eco degradant and MA-g-PE. Thermal stability of composites was also improved for composites with treated fibers.
Study of Influence Effect on Heat Transfer Performance of Single-Loop Oscillating Heat Pipe
Authors: Lei Su
Published: February 2014

s. The experiment studied the effect of heat source temperature, heating section length ratio, cooling air flow rate, liquid filling rate and pipe diameter on the heat transfer performance of the single-loop red copper-water oscillating heat pipe. The results show that increasing heat source temperature or pipe diameter and reducing filling rate can obviously reduce the thermal resistance of the heat pipe; in the air cooling mode, the cooling thermal resistance outside the pipe is affected by both cooling conditions and heat pipe cooling section average temperature; when the heating section is shorter than the cooling section, the heat pipe thermal resistance shows an apparent trend of increasing with the increase of heating section length ratio, when the heating section is longer than the cooling section, the cooling thermal resistance increases with it apparently; the heat transfer power is the highest when the filling rate is 50%.
Study on Flow Measurement Model of Gas-Liquid Two-Phase at Inlet of Wellhead for the Exploitation of Natural Gas Hydrate
Authors: Chen Shu Jun , Fu Yue , Pan Zhen , Liu Hong Bo
Published: February 2014

CO2 injection is an effective method for exploitation of natural gas hydrate. The injected CO2 flow measurement at inlet of wellhead is a gas-liquid two-phase flow for the exploitation of natural gas hydrate. The numerical simulation of gas-liquid two-phase flow is carried by FLUENT software in combination with a V-cone flowmeter. The rate of flow of fluid and the turbulent kinetic energy were analyzed for V-cone flowmeter. The efflux coefficients of V-cone flowmeter are calculated for the different equivalent diameter ratio. Based on homogeneous flow model, thoughts of James and the curves of volume flow, the lasted modified model of gas-liquid two-phase flow is obtained. The relative error is only 0.35%. It is feasible to measure the flow of gas-liquid two-phase flow by the lasted modified model, which will improve the exploitation of natural gas hydrate.
The Effects of Vertical Stratification and Land Use Data on Numerical Simulation of Wind Energy Resources
Authors: Deng Yuan Chang , Zou Zhen Cao
Published: February 2014

By adjusting the distribution of vertical layers and increasing its number in WRF model, this paper mainly studies the effects of vertical stratification on the near surface wind field and vertical profile simulation. The test outcomes show that moderately increasing vertical layers can effectively improve the near surface wind field simulation results, while it has little influence on the numeral and changing trend of high vertical wind profile. Considering both accuracy and efficiency, it is recommended to set 10~15 layers below 300m. On the basis of this research, instead of USGS data by using the MODIS_30S data, the data underlying surface land in Shenzhen and HK area are updated. Comparative results between the two schemes, due to the roughness and drag coefficient of difference types of surface are not identical; the surface data has a significant impact on wind field and wind profile simulation. Using the MODIS land use data which is more consistent with the actual situation can improve the accuracy of numerical simulation.
The Estimation of Wind Speed and Wind Power Characteristics in Taiwan
Authors: Ling Jeeng Min , Lublertlop Kunkerati
Published: February 2014

In this paper, the Weibull, Gamma, Lognormal, Rayleigh probability density functions (PDF) were used to statistically analyze the characteristics of wind speed and evaluate the energy based on hourly records from years of 2004 to 2009 at 24 locations in Taiwan. Weibull model shows the best goodness probability density function for estimating behavior of wind characteristic within six years at 7 sites of weather station better than using the Gamma and Rayleigh model. The annual mean wind power density is estimated and compared by different index. The feasibility of probability distributions at different locations were investigated.
The Research on Emission Performance of Large Marine Diesel Engine Based on Performance Parameters Analysis
Authors: Liu Hai Qiang , Lu Lin , Wang Zhong Jun
Published: February 2014

For the large marine main propulsion diesel engine, before delivered to shipyards should be evaluated NOx emission. This paper proposed a method just by analyzing the related parameters to evaluate the emission of marine diesel engine. Based on the small bore marine main propulsion diesel engine, analyzed the variation of performance parameters, to evaluate the emission performance at the condition of different power/speed at CMCR point and electric control mode. And the analysis results show that, for the same main propulsion diesel engine, the power of CMCR point has no obvious effect on the NOx emission performance, while the electric mode has a certain effect on the NOx emission performance. Finally, shop testing ware carried out to measure the NOx emission at the above condition, and the testing results approved the analysis results, and the parameter analysis method can be used in the practice.
The Research Status of Modular Multilevel Converter and its Capacitor Voltage Balancing Control
Authors: Chen Ya Ai , Chen Peng , Zhou Jing Hua
Published: February 2014

The thesis mainly analyzes the topology structure and the working principle of MMC based VSC-HVDC system; introduces the characteristics and research status of its capacitor voltage balancing control. All of this will lay a foundation for the further research.
Simulate Design of Direct Air Cooling Exhausted Duct System for 1000MW Super-Critical Thermal Power Unit
Authors: Wang Chun Qing , Bian Cai Xia , Wang Di
Published: February 2014

Balancing flow distribution and decreasing the pressure drop in each vapor distributing pipe are the importance of the study of exhaust pipe of direct air cooling power unit.In order to balance flow distribution and decreasing the pressure drop in each vapor distributing pipe,and simulate the flow field when add different chamfer on the back of exhausted pipe or not ,then using the CFD software called FLUENT,the steam flow field of exhausted pipe for a 1000 MW power unit with direct air cooling is stimulated under typical steam turbine conditions.The result shows that the steam flows through each distribution pipe with balanced flow under the condition of chamfer angle of 30 °and the flow resistance is much lower than before．
Study on Regulating Valve Settings for Small and Medium Cascade Hydropower Stations
Authors: Zhao Xiu Long , Zhang Jian , Liu Wei
Published: February 2014

For some small and medium cascade hydropower stations, they need to set regulating valves to regulate the discharged flow and ensure downstream water. this paper use an example of a cascade hydropower station to explore some issues related to regulating valve settings through some aspects like selecting the diameter of regulating valve, the impact on the regulation and assurance measures of hydropower stations with regulating valves and so on.Conclusions show that the water hammer pressure is the smallest when the diameter of the regulating valve is 0.7m,and the use of regulating valves can relieve the rise of water hammer pressure.These conclusions have referential significance on small and medium cascade hydropower stations.
A Review on Aerobic Granular Sludge for Heavy Mental Wastewater Treatment
Authors: Xie Yi Rui Wen , Zhang Xue Hong , Xie Qing Lin , Bai Shao Yuan
Published: February 2014

With the excellent settle ability and high-porosity structure, aerobic granular sludge was regarded as one of the promising biotechnologies in wastewater treatment. Developed about one decade ago, it was exciting research work that explored beyond the limits of aerobic wastewater treatment in eliminating a wide range of pollutants from the aquatic environment. On account of recent researches for removing heavy metals such as Cu (II), Pb (II), Cd (II) and cadmium (VI), a supposition that using aerobic granular sludge as a biosorbent for heavy metals removal from wastewater is put forward. This paper sketches certain correlative characteristics of aerobic granules, including settle ability, extracellular polymeric substance and biological parameters, discussed its feasibility for heavy mental removal, and finally lists a series of preceding studies on treatment of heavy metals by aerobic granular sludge.
Application Research on the Coupled Human-Environment Ecosystem Vulnerability Assessment in Different Spatial and Temporal Scales
Authors: Ni Jia Lin , Cai Ling , Wang Jing Keng
Published: February 2014

Researches and application of ecosystem vulnerability are effective ways to guide and solve the problems of global climate change and environment sustainable development. Studies on the vulnerability assessment of coupled human-environment ecosystem under multi-scale cross become a new hot issue of vulnerability research. In this paper, different ecosystem vulnerability assessments methods of natural ecosystem, social-economic system and coupled human-environment ecosystem were systemized, the advantages of the vulnerability of the coupled human-environment ecosystem assessment were analyzed. Respectively, the types according to different interferences and scales of the coupled human-environment ecosystem were classified: on time scale, the interferences was divided into sudden and cumulative two types, and in spatial scale, the ecosystem was divided into three types: macro, meso and micro. The assessment and application of different types of interferences correspond with ecological fragility in different spatial scale were also illustrated. Finally, the insufficient of coupled ecosystem vulnerability assessment in present researches was summarized.
Calculation of Eco-Environmental Water Demand for River Dalinghe
Authors: Zhou Lin Fei , Zhong Qian , Xi Zhi Cheng , Cheng Qian
Published: February 2014

According to the characteristics of north river, this paper used the minimum monthly average runoff method, the environmental function setter method and the annual average sediment concentration method to calculate the eco-environmental water requirement of mainstream of River Dalinghe. The results showed that: the non-consumptive water requirement was 4.46×108m3 for Shangwobao Station, 8.87×108m3 for Chaoyang Station, 13.96×108m3 for Yixian Station and 7.26×108m3 for Linghai Station per year; the evaporative water requirement was 0.019×108m3, and the leakage water requirement was not taken into account in the consumptive water requirement. The eco-environmental water requirement of mainstream of River Dalinghe can not be satisfied basically, the management department should control the disposal of sewage strictly for it.
A Comprehensive Model of a 6/10 Switched Reluctance Motor Based on Matlab Environment
Authors: Munyuen Chaowish , Buasri Panhathai
Published: February 2014

Switched reluctance motor (SRM) has a simple, inexpensive and reliable construction due to the concentrated coils on stator pole and no conductors or magnets on the rotor pole. The advantages on the SRM operation such as high speed, high torque to inertia ratio, fault tolerant, low inertia and low inrush currents, make it a better choice for use in different applications. The dynamic behavior of the SRM on various conditions should be studied. This paper aim is to develop a Matlab model of a 6/10 SRM using the mathematic equations. As the results, the simulation shows the impact of load torque on the phase current profile, speed profile, and inductance profile. The simulation is performed the characteristics of the switched reluctance motor in Matlab environment to show the efficiency of the proposed model.
Effects of Intake Port Optimization on Soot Emission from Diesel Engine
Authors: Chen Yue , Lv Lin , Shen Jie
Published: February 2014

All future engine developments must consider the primary task of achieving the required emission levels. An important step towards the development of combustion engines is the optimization of the flow in the intake ports. The charging movement in the combustion chamber, which is generated by the intake flow, considerably influences the quality of the combustion engine. In this paper, steady CFD analysis were applied to different structures of double-tangent-port. The swirl ratio can be improved while flow coefficient remains unchanged if port eccentricity is 34.4 mm. By defining three characteristic parameters, the speed non-uniformity index, standard deviation and mixture concentration standard deviation and equivalent ratio range, quantitatively describing the combustion process in cylinder, and then compared with transient CFD three-dimensional contours, we can see that characteristic parameters can be more accurate and comprehensive in analyzing the influence of inlet structure of soot formation. Effects of different intake ports on fuel-air mixing in a turbocharged diesel direct injection engine during intake and compression strokes are analyzed. It turns out that the optimized double-tangent-port has the highest uniformity of velocity, in the meanwhile, air/fuel mixing is relatively uniform. On the other hand, mixed-port and double-helix-port can cause uneven flow field which is bad for combustion, even though the swirl ratio can increase largely. Finally, the simulation results show that soot emissions of the optimized double-tangent-port have significantly lower levels, at 2200 r/min under full load.
Experimental Study on Energy Saving between Heat Pump Unit of Heat Recovery Fresh Air and Heat Pipe Heat Pump Low Temperature Heat Recovery Unit in the Cold and Severe Cold Regions
Authors: Li Yang , Liang Xiu Juan
Published: February 2014

In the cold and severe cold regions of our country, the average temperature in winter outdoor usually below -20°C. Air conditioning units was limited and damaged when it running under such conditions. In order to solve the the problems pointed out previously, the paper put forward solutions of the fresh air handling units in combination with heat pump unit of heat recovery fresh air and heat pipe heat pump low temperature heat recovery unit. Comparison energy-saving and recovery period of the two method through experimental research.
Research for Water Quality Problems of Power Plant Circulating Cooling Water Source Heat Pump System in the Cold and Severe Cold Regions
Authors: Li Yang , Liang Xiu Juan
Published: February 2014

In the northern cold areas, the circulating cooling water contains a large number of low temperature waste heat.Cold and heat sources can be used as a heat pump heating to the building. The experiment shows that the system has significant economic, energy conservation and environmental value. This article describes the plant circulating cooling water source heat pump system, water quality, corrosion and fouling problems, and solve these problems need to pay attention.
Risk Assessment of Heavy Metal Pollution by Three Plants at Zihu River in Nanjing, China
Authors: Shen Yu , Chen Qin , Zhang Kai Mei , Fang Yan Ming
Published: February 2014

Abstract. The concentrations of heavy metals (As, Cr, Cd, Cu, Zn, Mn, Ni and Pb) were measured in the water, sediment, and three common plants (Rorippa indica,Rumex acetosaandOrychophragmus violaceus) from Nanjing Forestry University reach of Zihu River, China. Results showed that the toxic threshold values exceeded the upper limits for Cd and Mn in water. In the same way, toxic threshold values exceeded the limitation for As, Cd, Cu, Ni, Pb and Zn in sediment. Overproof Cd, Cu, Mn, Ni, Pb and Zn were also found in rhizosphere soil. Average concentration of Zn was higher in sediment, followed by Mn in both water and rhizosphere soil. It was found that heavy metals (Cd, Cu, Ni, Pb, As and Zn) in water may be mainly derived from metal processing, electroplating industries, industrial wastewater, and domestic sewage. Positive correlation was observed between As and Cu, As and Ni, Cr and Pb, Cu and Ni, Pb and Zn in water. Moreover, significant positive correlations between Ni and As were observed. Preliminary judgment showed that sediment has a depuration effect on As, Cu, Ni, Cr, Pb and Zn in water, according to correlation coefficients of water and sediment. Comparing the relations between sediment and rhizosphere soil, Cr, Cu, Ni, Pb and Zn in the rhizosphere soil were mainly from the sediment, and Mn was mainly from water. Three plants played active roles on enrichment of As, Cr, Cu, Mn, Ni, Pb and Zn, particularly, Zn and Mn can be accumulated to higher concentration in these three plants. As content in rhizosphere soil was found to be lower than sediment, indicating As was most absorbed by the plants. Thus, three plants were playing a potential role in environment inductors.
Study on Iron Release with Various Blending of Desalinated Water and Tap Water
Authors: Wang Lei , Yang Yu Long , Li Cong , Zhang Yi Ping , Zhang Ke Jia
Published: February 2014

This study examined effects of various blending ratio of desalinated water and tap water on iron release. Pipe rig tests were conducted to simulate and demonstrate iron release in response to water quality changes. Results show that compare to conventional treated water, desalinated water has a pronounced effect on the iron release in ductile iron pipe; increasing fractions of desalinated water in the blends result in higher total iron release. An increase in pH from 8.0 to 10.0 after 24 hours was found due to alkaline substances (like calcium oxide) releasing from the cement mortar lining and the poor buffering capacity of desalinated water.
Study on Thorny Bamboo Activated Carbon for Capturing Heavy Metals in Groundwater
Authors: Huang Pei Hsing , Wen Jin Ton
Published: February 2014

This study used 4~5-year-old thorny bamboo as the raw material to produce activated carbon. The effects of activation conditions on capturing the heavy metals in groundwater were discussed. In order to determine the absorption and capture properties of activated carbon, fundamental adsorption properties including charcoal yield, ash content, pH value, concentration of heavy metals, particle size, Brunauer-Emmett-Teller (BET) surface area, and Iodine number were analyzed. The experimental results showed that when the activation temperature increased, the charcoal yield of bamboo decreased and the pH value increased. The thorny bamboo activated carbon prepared at an activation temperature of 800 °C for 1 hr exhibited a maximum iodine sorption value and BET surface area value. The results suggested that the thorny bamboo activated carbon prepared under this process condition possesses a highly adsorptive capacity.
The Application of System Dynamics Model of City Water Demand Forecasting
Authors: Yang Sheng Na , Guo Hua , Li Yan , Liu Jun Liang
Published: February 2014

With the continuous development of city, urban water consumption is continuously increasing. But the earth's fresh water resources are limited. If you want to meet the urban development increases the amount of water, you must forecast for urban water demand in the future, water demand prediction is also should be formed. This research mainly adopts the method of system dynamics to predict the water demand of city over the next decade. Forecast of water demand to get accurate effective demand in the future by establishing a system dynamic model, which accuracy should tested and verified.
The Groundwater Seepage Numerical Simulation and Prediction for a Alluvial Fan Water Resources Site
Authors: Zhang Dang Li , Qi Shan Hong , Guo Wei Xin , Yang Feng Wei
Published: February 2014

Based on the analysis of geological conditions of water resources site, generalized hydrological model was built, which was divided into three layers with different parameters. By using Visual Modflow, the groundwater seepage field was simulated for different mining yields, which give suggestions for the reasonable mining schedule of water resources site.
Magnetic-Field Modulation Principle and Transmission Ratio Calculation of Field-Modulated Asynchronous Magnetic Coupling
Authors: Yang Chao Jun , Lu Dan , Hu You , Chen Xiao Ping , Ma Ru Yu , Kong Ling Ying
Published: February 2014

A field-modulated asynchronous magnetic coupling is a new type of composite magnetic transmission mechanism, which is based on the principles of magnetic field modulation and electromagnetic induction. The rotational velocity and direction of the inner conductor rotor could be changed, since the magnetic field generated by permanent magnet outer rotor is modulated by ferromagnetic pole-pieces. Therefore, the couplings can meet special conditions with special requirements for load and speed. The formula of the modulated magnetic flux density of inner air gap is analyzed through magnetic field analytic approaches, and then the formula of transmission ratio is also deduced by introducing slip ratio in the mean time. Finally, experimental research of the coupling is conducted. The results show that the transmission ratio of the coupling is not only related to the ratio of the number of pole pairs on outer permanent magnet rotor and the number of pole pairs of magnetic field flux density harmonic, but also related to the slip ratio. Besides, the transmission ratio of the coupling increases non-linearly with the slip ratio.
Particles Separation of Hydrocyclone Based on CFD Simulation
Authors: Song Jing , He Wei , Li Zhe Kun , Shi Wen Li
Published: February 2014

Analyzed the research status of hydrocyclone separation. By using CFD software, the important parameters of velocity and pressure in the hydrocyclone are analyzed and contrasted. Through simulation, it can accurately reflect the internal flow field, and can be used to predict the hydrocyclone separation performance. The results of flow field simulation will help to finish structure design of hydrocyclone and to provide the basis for the optimization design of hydrocyclone.
Availability Analysis of Mercator Projection in Nautical Charts' Compilation in Polar Regions
Authors: Wen Chao Jiang , Bian Hong Wei , Gao Xin , Wang Rong Ying
Published: February 2014

Availability of Mercator projection in polar regions mainly suffers from gross scale error and only can be improved by control of scale error; methods of scale error control such as properly adjusting of standard parallels, appropriately defining and relaxing acceptable scale error thresholds together with adopting appropriate chart scales and sheet specifications are presented; appropriate acceptable scale error thresholds are discussed by referring to domestic and abroad chart compilation specifications and existing Russian polar nautical charts; availability of Mercator projection in latitudes of 75°~85°is analyzed on charts with various standard parallels, scale error thresholds and latitude ranges, the result indicates that Mecator projection still satisfies compiling requirements of nautical charts with commonly used scales and sheet specifications in latitudes between 75°and 85°.
Effect of Application Uniconazole on the Growth and Physiological Activity of Wheat Seedling
Authors: Zhang Cheng Ming , Zhou Xin Bin , Ren Zi Xuan , Chang Hong
Published: February 2014

Effects of various azole olefinic on growth and development of wheat were studied under solution-culture conditions. The results showed that moderate azole olefinic can improve the wheat seedling chlorophyll content, and improve the growth of root, restrain the growth of stem. And azole olefinic can reduce the MDA content of the leaf and roots, which can increase the proline content and improve the wheat seedling resistance.
Simulation Analysis of an Ambulance Carriage Interior Noise
Authors: Hou Shi Ke , Bai Song , Fan Hao Jun , Ding Hui , Zhang Yong Zhong , Yu Bao Guo
Published: February 2014

Based on the theory of multi-body system dynamics, the analytical method of finite element and boundary element, the finite element model of vehicle body, the rigid-flexible coupled model of vehicle and the acoustic boundary element model of carriage were established by applying a variety of simulation software. Road roughness was simulated and the SPL of field point in carriage under the excitation was computed at the frequency range of 20-150Hz. Considering the size and the positive /negative nature of panels acoustic contribution at SPL peak of field point, damping treatments were taken on different combinations of panels to decrease multiple field points SPL peak and the optimal treatment was finally confirmed. The results showed that noise reduction measures can generally decrease the SPL peak around the crew.
Based on RBF Neural Network Modeling of Well Test System
Authors: Tian Jia
Published: February 2014

The Neural Network Toolbox in MATLAB is a powerful instrument of analyzing and designing a neural network system. RBF Neural Network has small computational burden and fast learning rate and is not liable to be trapped by local minimal points etc. So it is an effective means to identify and model a system. In this paper, the Neural Network Toolbox in MATLAB and RBF Neural Network are combined to solve the problem of modeling the pressure in oilfield test well systems and the result is excellent.
Study on Coalbed Methane well Type Optimization of Badaowan Formation in Junggar Basin
Authors: Liu Cheng Long , Guo Hui , Wang Xiang Hao , Wang Jin
Published: February 2014

This paper applies AHP method and fuzzy evaluation method to establish evaluation system of CBM well type in Junggar Basin. Conclusions are drawn as follows: weight of each factor which determines well type optimization is very different, coal seam depth is 0.402, coal seam thickness is 0.295, coal permeability is 0.163, coal seam dip is 0.14. Sikeshu area and center of the basin is not suitable for CBM ground drilling. Changji to Fukang area and Muleihasakexian to Wucaiwan area and East Wuerhe area are favorable for vertical well drilling. Jimusaer area is favorable for horizontal well drilling. Other areas in Junggar Basin need vertical and horizontal well joint drilling.
The Influence of Micro-Character on Macroscopic Properties in Low Permeability Reservoir
Authors: Zhang Yan , Lei Lin Fei
Published: February 2014

The relation of microscopic features and the macroscopic properties such as permeability, porous and oil displacement efficiency in low permeability reservoir is much more complex than in conventional reservoir. Understanding the microscopic features and its influence law to macroscopic properties in low permeability reservoir is key to tapping remain oil. In this paper, the microscopic and macroscopic features and their relationship is studied. Studies suggest that in low permeability reservoir the main reservoir spaces include micro cracks, intergranular pore, intragranular pore and intracrystalline pore. The contribution of micro-cracks to porosity is not big, but its influence to permeability cannot be ignored. Porosity mainly effect by the development degree of pore throat, the bigger radius of pore throats are, the porosity is higher. The permeability and mercury efficiency are affected by feature structure coefficient, which reflect the characteristics of connectivity, it showed a positive correlation between the Coefficient and permeability, but Mercury efficiency and the Coefficient have positive correlation in mesopore reservoir, they have Negative Correlation in low or super-low porosity.