bluuebunny/crossref_metadata_2025 huggingface dataset:
DC Protective Measurement and Control Device for Mass Transit Based on VxWorks
Authors: Zeng Qing Zhao , Song Jin Chuan , Wu Su Zhuo
Published: October 2014

VxWorks operating system provides the technical foundation for the products development of DC protective measurement and control device for mass transit. According to technical requirements of products of DC protective measurement and control device for mass transit, this paper set up software and hardware implementation scheme and deeply analyzed the key technology such as task function division, message management, interrupt management and protection task realization.The successful application experience of this technology scheme has the guide meaning for the development of the similar products.
The On-Line Monitoring of the Winding Deformation of Transformer Based on the Improved Ultrasonic Ranging Method
Authors: Liu Wei Jia , Wang Xin , Zheng Yi Hui , Li Li Xue , Lang Yong Bo , Shao Feng Peng
Published: October 2014

The assessment of the winding deformation of transformer has a certain practical significance. In this paper, an Improved Ultrasonic Ranging (IUR) method is proposed to assess the winding deformation of transformer. Firstly, the basic principle of winding deformation detection using ultrasonic and the working principle of detection device are discussed. Secondly, the impact of the factors such as transformer oil temperature and echo signal attenuation on the test results is analyzed. Then, a new IUR method is composed, which can realize the on-line monitoring of transformer winding deformation. Finally, an assessment equipment of transformer winding deformation based on the online monitoring is developed, and a prototype is used to test the transformer mode, proving that this method is feasible.
Micro-Grid Energy Optimization Base on Installing Heat Storage Tank to Decouple “Heat-Load-Based” Running Constraint of CHP
Authors: Shi Shan Shan , Liu Fang , Yang Xiu
Published: October 2014

Installing heat storage tank (HST) to decouple CHP “heat-load-based” running mode, which will improve operation efficiency of CHP and enhance the ability of peak-adjusting in micro-grid (MG) system, and also be benefit for MG to consume high penetration renewable energy. For the randomness of wind turbines and photovoltaics output and the volatility of loads, a comprehensive optimization method for MG heat and electric energy based on chance-constrained programming is proposed. This method has considered thermal balance constraints and HST operation constraints, which made MG minimum operating cost as optimization goal, and optimize the output of each micro-source by genetic algorithm to form the best operation mode.
Scenario-Based Stochastic Programming Strategy for Microgrid Energy Scheduling Considering Uncertainties
Authors: Li He Peng , Zang Chuan Zhi , Zeng Peng , Yu Hai Bin , Li Zhong Wen
Published: October 2014

The inherent random and intermittence of the renewable energy resources pose a huge challenge to the Microgrid (MG) energy management systems (EMS). In order to mitigate the effects of uncertainties, we propose a novel two-stage stochastic programming model for the energy scheduling optimization by considering the uncertainties in solar and wind generation, and the plug-in electric vehicles (EV). The random nature of uncertainty is characterized by a scenarios generation approach based on autoregressive moving average (ARMA) model according to probability density function of each random variable. By use of the strategy of scenarios simulation, the stochastic problem is decomposed into the deterministic equivalent problem. The firefly algorithm (FA) is used to solve the equivalent model. The effectiveness and robust of proposed stochastic energy scheduling optimization strategy for MG is valid by comparison with the simulation results of deterministic method.
Study of the Winding Temperature Distribution for Distribution Transformers
Authors: Quan Yu Sheng , Fang Lin Jie , Wang Zi Jian , Shi Pu Xin
Published: October 2014

In this article, in order to provide a reference for determining the location of fiber optic temperature probe in saving distribution transformers,we analyze the internal transformer by the basic heat transfer theory and simulate via ANSYS simulation software, determining the location of the highest temperature separately of the high and low voltage winding and iron core. The simulation results will be as a reference value for the experimental results. Therefore, it is very significant for analyzing the hottest point distribution of distribution transformers and improving thermal design of dry type transformers and temperature monitoring that the numerical simulation of dry-type distribution transformers of temperature field.
Hydraulic Steering Gear Failure Analysis and Troubleshooting for MV “TANSUO HAO”
Authors: Zhang Shou Jun , Li Bin
Published: October 2014

The rudder and steering gear is the most widely used ship maneuvering equipment. It consists of the maneuvering device, transmission mechanism, steering gear, steering mechanism and the rudder blade. MV "TANSUO HAO" is a scientific research ship of 30 years old. The scientific exploration missions require a very high accuracy of the ship’s course, so the ship has to constantly adjust her course and steer frequently. On that day, the duty officer found the steering gear failure to turn left in the rough sea condition. The engineering crew members had to make an emergency repair. It took plenty of time to locate the trouble of the steering gear in the repair process, because the valve plate deformation problem on the solenoid reversing valve was very hard to find out. By exploring the obscure steering gear failure reason and special troubleshooting process on MV "TANSUO HAO", this thesis provides some repair experience for the hydraulic system management and proposes flexible and patient failure analysis as well as some preventive maintenance measures against the problem.
The Mixed Modeling of the Steam Turbine Flow Characteristics Based on Improved Particle Swarm Optimization Level
Authors: Zhao Ning , Chen Ya Mi , Wangr Hui Jie
Published: October 2014

Power station steam turbine stage flow characteristics show that the relationship between pressure and flow, which was the important research foundation for analysis of steam turbine performance and the further optimization analysis of unit. Based on strict theory analysis, this article obtained two important key characteristic coefficients such as the capacity of flow coefficient and the level of group critical pressure ratio which mainly influenced the turbine characteristics. And then the secondary flow calculation model was imposed combining with the massive actual data, adapting the method of improved PSO algorithm. The practical results show that, the obtained model not only ensured good regularity and ductility, but also has higher calculation precision.
Numerical Optimization for Bottom Structure of ZGM Medium Speed Mill
Authors: Zhu Xian Ran , Liu Cheng Yong , Cheng Liang
Published: October 2014

The inner flow fields in the ZGM95 medium speed mill are numerically simulated by employing the commercial code of FLUENT. The results show that the static pressure and the flow rate at each nozzle ring is different from those of others due to the primary air entering the mill only from one side. Some baffles are proposed to be added in the bottom chamber of the mill to optimize the performance of medium speed mill, and the modified models are also simulated. A couple of fan-shaped baffles, which are arranged symmetrically in the bottom chamber, can improve the distribution of the flow fields efficiently in the mill while few pressure drop of the mill will increase. The structure with fan-shaped baffles is recommended to be an important choice of the structural optimization of the medium speed mill. The numerical investigations also indicate that the structural modification of mill should be as simple as possible.
Experimental Study on a New Type of Shipping Container Refrigeration Unit
Authors: Hua Kai Tai , Yu Wen Sheng , Chen Wu
Published: October 2014

In this paper the technical features of various representative shipping container refrigeration units were reviewed firstly. A new type of shipping container refrigeration unit was developed. The pull-down experiment was carried out in cool mode (setpoint 0°C) and frozen mode (setpoint-18°C) using the test rig for the refrigeration unit. The experiment results shown that the new type of shipping container refrigeration unit had good pull-down performance respectively in cool mode and in frozen mode. Meanwhile, the control accuracy of the temperature of air inside container can reach ±0.3°C successfully.
Experimental Investigations on Alkali-Activated Slag Cementitious Material
Authors: Sun Xiao Wei , Niu Wan Yang , Wang Ling Ling
Published: October 2014

These are many factors that can influence the properties of alkali-activated slag cementitious material, such as the modulus and content of water glass, water-cement ratio, curing conditions, and so forth. The rules that how these factors affect setting time and strength of the material are systematically discussed in the paper. It is found that the setting time of the material depends on the concentration of alkaline ions in solution; The material will have the best strength when the modulus and content of water glass are 1.4 and 8%, respectively. The curing temperature increase will be helpful to compressive strength increase.
Key Technologies and Trends of Passive Buildings
Authors: Shi Li Zhong , Zhang Ye Min
Published: October 2014

In recent years, ‘passive house’ is an increasingly well-known word, and has gained rapid popularity and application in Europe and other developed countries. Currently, residential passive house is growing at 8% annually in Europe. With its low energy consumption and ultra-high comfort, it is acclaimed as the most promising energy-saving substitute of conventional residences of this century. The passive houses in Hamburg Germany use 75% less energy than the normal low-energy buildings, more than 90% less than conventional German buildings [1]. As reported by the National Conference of Green Building Materials and German Passive House Technology held from 22nd to 25th April 2014, passive house will certainly become the mainstream building in the country in the next three to five years.
The Interference Impact of UWB Sensor on Mobile Station of 3G Mobile System
Authors: Sun Tie Jun , Yang Wei Dong , Cheng Yan Ming , Duan Feng Yun , Mi Hong Tao
Published: October 2014

This paper presents the interference impact of Ultra Wide-Band (UWB) sensor using frequency of 3.5 GHz on 3G mobile system in Korea. The Minimum Coupling Loss (MCL) method and Spectrum Engineering Advanced Monte Carlo Analysis Tool (SEAMCAT) were used to evaluate the interference impacts of UWB sensor on 3G mobile system. The minimum allowable distance between UWB interferer and the victim receiver is required 0.09 m in indoor environment; in the case of multiple UWB interferers in outdoor environment, the maximum allowable UWB transmitting Power Spectral Density (PSD) should be-93.1 dBm/MHz below to guarantee co-existence with 3G mobile system.
Impacts of Electricity Price Reform on Energy and Residents’ Life in China
Authors: Wang Yan , Jiang Xi , Xu Ya Lin , Liu Yue Tong , Huang Ao
Published: October 2014

Electricity price reform aims at improving resource allocation and energy saving. In this paper, The latest input-output data and price affect partial-closed model are used to measure the impacts of electricity price reform for the whole society, energy industry and the residents con- sumptions. The results indicate that electricity price reform had limited impacts on GDP and resi- dents’ consumption, and the impacts on mining industryand energy industry are more significant than others. The policy certainly achieved the aim to adjust energy structure and promoted the co -ordinated development of urban and rural economy.
Introduction of Complex Automation of Engineering Infrastructure for the Solution of Operational Problems in Public Sports Pools
Authors: Volkov Andrey , Romanenko Evgeny
Published: October 2014

This article covers main problems associated with the operation of public sports and fitness swimming pools and consequences, which may result from the improper operation of them. Issues of how to maintain indoor climate conditions in a swimming pool room are brought up. In addition, it describes the necessity of using an indoor climate control smart system, its efficiency and cost-effectiveness.
Research on the Application of IT in Electrical Automation Technology Major Course Teaching
Authors: Yang Shuo , Feng Dong Shi
Published: October 2014

The core of the modern vocational education lies in the way of talent cultivating. In the process of training the professional talents in the major of electrical automation technology, universities and colleges should make full use of information technology education resources to pass on the whole set of knowledge and skills to students, at the same time, give full play to the subjective initiative of students in order to cultivate innovative talents.
The Impact of Information Technology on the Performance Evaluation System of Scientific Research in Universities
Authors: Feng Dong Shi , Yang Shuo
Published: October 2014

This paper expounds the content of performance evaluation system of scientific research in colleges and universities and how the information technology impact on it. It emphatically discusses the scientificity of the evaluation method and sums up the characteristics of performance evaluation system of scientiflc research based on information technology.
Optimal Wind Power Planning Considering Power System Adaptability and Economy
Authors: Luo Kui , Shi Wen Hui , Zha Hao
Published: October 2014

Wind power planning towards large-scale accommodation of wind power while satisfying technical and economical constraints, it should consider power system adaptability and economy when giving full play to the wind benefits. This paper considers the relationship among wind power accommodation, construction of transmission lines and conventional unit operation costs and proposes an economic and reasonable wind power planning approach aiming at accommodating wind power efficiently and effectively. Combined the constrains of peak load regulation and network construction together, optimal wind power planning model is established, and based on the system operation simulation, a series of wind power planning evaluation index are obtained, which can estimate the wind power planning scheme from multiple angles. Finally, the feasibility and reasonability of the proposed planning approach has been verified by a numerical test system.
Planetary Gear Train Used in Wind Driver Generator Based on TCA
Authors: Xu Kai , Jia Ping , Qiu Ming , Yang Jian Jun
Published: October 2014

By the disadvantage of the speed fluctuations to the gear noise and vibration spectrum in time domain, a new method to measuring the periodic signal was put forward in pulse time domain. The multi-channel simultaneous measurement model were brought out, aimed at analyzing the gear meshing state and its frequency characteristics. Then, the 14 DOF nonlinear vibration equations was derived from kinetic analysis on the planetary gear pair meshing model, which was solved and simulated in Matlab software, containing with transmission error, time-varying mesh stiffness, clearance and other factors. Finally, an integrated platform was constructed for measuring gear noise, vibration and transmission error to verify the effectiveness and feasibility of the analytical.
Technical and Economic Analysis on Grid-Connected Wind Farm Based on Hybrid Energy Storage System for Active Distribution Network
Authors: Feng Yi , Shao Lei Jun , Zhang Bang Ling , Wu Meng Jie , Shao Yu Pei , Liao Qiang Qiang , Zhou Guo Ding , Sun Bo
Published: October 2014

Active distribution network with energy storage system is an important outlet for a mass of distributed renewable energy connected to the grid. In this context, a hybrid energy storage system is proposed based on NaS battery and lithium ion battery, that the former is the main large scale energy storage technology world-widely used and developed and the latter is a flexible way to have both power and energy capacities. The hybrid energy storage system, which takes advantage of the two complementary technologies to provide large power and energy capacities, is chosen to do an evaluation of economical-environmental based on critical excess electricity production (CEEP), CO2 emission, annual total costs calculated on the specific given condition using Energy PLAN software. The result shows that hybrid storage system has strengths in environmental benefits and also can absorb more discarded wind power than single storage system and is a potential way to push forward the application of wind power and even other types of renewable energy resources.
Wind Data Anomaly Detection and Interpolation of Missing Data
Authors: Yang Mao , Dong Jun Cheng
Published: October 2014

Data accuracy and completeness of the wind farm has great significance in wind power research. Because of the wind farm in the process of gathering data and transmission appears distorted and missing, and that leads the accuracy and integrity of data is greatly reduced, so the need for a wind farm data, outlier detection and missing data imputation. This paper outlier detection by statistical method based on 3σ criterion under the normal distribution, and use of the effectiveness of the recently distance interpolation and regression interpolation for missing data, outliers and replacement and interpolation, filled after data and accuracy are improved.
Efficiency and Performance Analysis of Tidal Current Energy Turbine Basing on the Unidirectional Fluid-Structure Interaction
Authors: Liu Xue Feng , Wang Jin Bao , Tian Mei Ling , Tang Zhi Bo
Published: October 2014

As the Key Components of a Horizontal Axis Tidal Current Energy(HATCE) Turbine, the Blades will be Affected by the Force of the Fluid when the Turbine is Working, which also Results in a Possible Effect on the Safety and Stability of the Tidal Current Energy Turbine. Thus, both the Structural Performance and Energy-Catching Efficiency of HATCE Turbine should be Paid Equal Attention. in this Study, Basing on the Workbench, the Energy-Catching Efficiency and Structure Performance of the Designed HATCE Turbine with Stainless Steel and Structural Steel at the Different Current Speeds are Comparatively Studied Using Unidirectional FSI Analysis Method. it can be Concluded that the Output Power of the Turbine is Lower at a Low Current Speed but its Energy-Catching Efficiency is Higher and Vise Versa. as a Result of Structure Performance Analysis, the Designed Turbine has Adequate Safetyunder all Loaded Conditions. Thus, the Designed Turbine Models are Available.
Wave Data Analysis for Wave Energy Power in Namae Coast
Authors: Kang Byung Ho , Kim Kyu Han
Published: October 2014

In order to install the wave power facilities in ocean and coastal area, it is very important to determine the properties of wave data. Discrete wavelet packet transform was applied in this study and was used as a tool to find out the basic properties of waves around Namae coast. Important features of hydrodynamic pressure such as frequency and magnitude were investigated in different observation time. Also the idea of measuring the noise rate was introduced and applied to both stationary and non-stationary time spans for the comparison. These methods would be useful to check the feasibility of wave energy extraction in various types of coasts.
Energy Saving Operation Strategy of an Existed Indoor Ice Rink
Authors: Sun Bin , Wang Hao , Wu Xian , Ma Ying Feng , Zhao Yuan , Jiang Yi Qiang
Published: October 2014

For the problems that operation energy consumption is large, lack of energy saving strategy existed in the speed skating ice rink in Harbin Ice Training Base, field investigation is conducted and the data measured schemes are put forward including the temperature distribution above ice surface in vertical direction, the indoor relative humidity, the refrigeration units power consumption, the inlet and outlet temperature of cooling water etc. Then select the data of general training days and typical match days for comparative analysis. The results show that the running cost of refrigeration units represents a significant proportion of the total running cost; lack of low energy consumption dehumidification method to solve the problem that fog above the ice surface; in winter, using the outdoor cold source can reduce energy consumption of the cooling tower. Based on them, energy saving operation strategy based on outdoor cold source and using the return secondary refrigerant from the ice rink for cooling dehumidification are put forward.
Optimal Method of Energy Storage Configuration Considering Operation and Penalty Cost
Authors: Li Jun Hui , Feng Xi Chao , Cui Xin Zhen , Mu Gang , Luo Wei Hua
Published: October 2014

An evaluating method for lifetime degradation degree of battery energy storage system (BESS) is proposed in this paper. Base on the method, relationships among capacity and degradation degree of lifetime of BESS, unmet reference power are analyzed. An evaluation index is then proposed considering operation cost of energy storage and penalty cost for failing to meet the reference power. Lastly, an optimal method for capacity configuration is developed and is verified in the study case.
Pumping Action of Heat Transfer for Free Convection Flow in a Ventilated Facades
Authors: Petrochenko M.V. , Strelets K.I. , Petrichenko M.R. , Yavtushenko E.B.
Published: October 2014

The flows generated by lifting force can be met as in environment as in a number of technical devices. These flows emerge due to volume force which depends on the difference in densities caused by transfer of thermal energy as a result of temperature non-uniformity. Convection flows, which cause heat transfer between surfaces and air, emerge near heated or cooled surfaces. The densities of both liquid and gas depend on temperature. Therefore with the temperature gradient in liquid or gas mass forces are different at different points. This causes motion of gas or liquid which can be defined by direction of the field of mass forces, distribution of temperature in liquid and geometric shape of volume.
Analysis of Temperature Field in an Oil-Shale Retorting Furnace with Gas Heat Carrier Based on CFD
Authors: Bai Jing Ru , Xin Si Yu , Wang Qing , Qin Hong
Published: October 2014

Taking the physical model of a small oil-shale retorting furnace with gas heat carrier as research object, a quasi homogeneous mathematical model was established to simulate the process of heating the pebbles in the porous zone and was solved by Fluent, a commercial CFD software. We compared the calculated results of temperature with the measured data, and analyzes the cause of the deviation between them.The result showed that the calculated value is relatively close to the measured data(the relative error is 6.85%) and the model can predict accurately the actual temperature field. The research results can provide support for the process of structural design of the large oil-shale retorting furnace with gas heat carrier.
Degradation and Performance of SOFC Cathode
Authors: Liu Run Ru , Wang De Jun , Jing Leng , Wang Li Li
Published: October 2014

The scope of this paper is focused on analyzing the chemical degradation of LSCF cathode induced from many sources by GCI technique both from theoretical and experimental sides. As you know, electrochemical reaction occurring in the SOFC cathode is the reduction of oxygen, therefore cathode materials for SOFC have to posses many properties. It is necessary to evaluate the performance and degradation of SOFC cathode since improvement of long-term stability is one of the major issues during SOFC commercialization process. This research is important toward the commercialization of SOFC because efforts are being made to clarify the mechanisms of cell performance degradation and to improve durability effectively.
Hydrated Proton Transfer in Nafion117 Membrane
Authors: Li Zhi Jie , Zhang Fang Hui , Sun Hong , Wan Ye
Published: October 2014

The proton transfer impedance in the proton exchange membrane is the main impedance of PEM fuel cells. In this paper, the molecular model of the hydrated proton transfer in the Nafion117 membrane is established based on the basic principle of molecular dynamics; the effects of temperature and water content on the proton transfer are analyzed. The results reveal that the hydronium ion clusters H5O2+ is the main structure style of the hydrated proton transfer in the proton exchange membrane; with the increase of the temperature, the thermal motion of particles accelerates, which leads to the hydrated proton diffusion speed up; when the water content increases, the hydrated proton diffusion coefficient increases. The results are very helpful to understand the proton transfer in the membrane.
Research on the Microwave Pyrolysis of Coal under N2 Atmosphere
Authors: Zhou Jun , Yang Zhe , Shang Wen Zhi , Song Yong Hui , Lan Xin Zhe
Published: October 2014

Microwave pyrolysis of low rank coal is a new technology of cleaner production. The effect of microwave power and flow rate of N2 on the yield of pyrolysis products under N2 atmosphere was explored. The results showed that the higher microwave power was, the higher all the terminal temperature, the yield of liquid products and the weight loss rate were. The flow rate of N2 had little influence on the yield of pyrolysis solid products, while it exerted a greater influence on the yield of pyrolysis liquid products. When the low rank coal was pyrolysised under the conditions of microwave power of 800W and flow rate of N2 of 4.0×10-4 m3/min, the yield of Bluecoke and liquid products respectively reached 65.8% and 18%.
Study on Synthesis of Alkynoxymethyl Benzyl Quaternary Ammonium Salt and its Corrosion Inhibition for Blast Furnace Gas Pipeline
Authors: Zhang Hu , Zhou Fu Rong
Published: October 2014

Two kinds of alkynoxymethyl benzyl quaternary ammonium salt (ABQAS) were synthesized by raw materials of paraformaldehyde, propiolic alcohol, organic amine, benzyl chloride and ethanol under nitrogen protection, toluene as carrying agent. The products were characterized by FTIR. According to the characteristics of blast furnace gas pipeline, quaternary ammonium salt type compound corrosion inhibitor formulas were designed, and their corrosion inhibition performance were evaluated by weight-loss method and electrochemical method. The results showed that the products were synthesized as expected, the two kinds of products had excellent inhibition performance to the cathode electrochemical process of A3 carbon steel, and the corrosion inhibition efficiency in simulative blast furnace gas reached to 100%.
Synthesis of La1-xSrxGa1-yMgy-zMzO3−δ (M=Cr, Mn, Fe, Ni, Co) Electrolyte for IT-SOFCs by Laser Rapid Sintering
Authors: Zhang Jie , Pan Li Jun , Yuan Chao
Published: October 2014

A laser rapid sintering (LRS) method has been developed for the synthesis of La1-xSrxGa1-yMgy-zMzO3−δ(M=Cr, Mn, Fe, Ni, Co), an excellent electrolyte for solid oxide fuel cells. It is shown that pure perovskite La1-xSrxGa1-yMgy-zMzO3−δphase can be produced within a few seconds with this method under optimized synthetic conditions. The samples prepared by laser rapid sintering give rise to unique ridge-like or spear-like microstructures which are orderly arranged and densely packed. It is found that the La0.9Sr0.1Ga0.8Mg0.2O3−δand La0.8Sr0.2Ga0.83Mg0.085Co0.085O3−δsamples synthesized by LRS exhibit superior electrical properties to those samples for the same composition by solid state reaction (SSR) possibly due to their unique microstructure with relatively oriented and densely packed ridge-like or spear-like grains with large and regular sizes.
Case Analysis of the Solar Heating System Assisted by Condensing Wall-Mounted Gas Heater
Authors: Kou Guang Xiao , Cai Ling Ling , Ye Yong Jun , Lu Rong Rong , Shang Pei Na
Published: October 2014

Taking household heating for an example, this paper has introduced the composition and characteristics of combined heating system with condensing wall-mounted boiler and solar water heater; and through the simple contrastive analysis of the economy and environmental protection with the solar heating system assisted by electric heating and wall-mounted gas heater, it is believed that the heating system combined with condensing gas heater and solar heating is the better choice of household heating considering its energy saving, economy and environmental protection.
Simulation Study of Partial Discharge UHF Wave Transmission Characteristic in GIS Typical Structure
Authors: Yang Jing Gang , Jia Yong Yong , Zhao Ke , Gao Shan
Published: October 2014

Defects inside the gas-insulated switchgear (GIS) will produce ultra-high frequency (UHF) electromagnetic waves. The waves will be affected by the shell of GIS when propagating inside the GIS cavity. In the 0-3GHz frequency range, propagation characteristic of electromagnetic which is excited by partial discharge in GIS is simulated based on the method of finite difference time domain (FDTD). This paper designs the GIS simulation models with and without insulator according to the size of a 220kV single phase GIS bus and sets a metal protrusion defect on the bus as the PD source. The transmission characteristics of model waves inside typical GIS structures, and the influence of the insulator to the propagation of electromagnetic wave was studied via setting the different directions of electromagnetic, comparing the time and frequency domain results of electromagnetic wave in different structures and measurement angles.
Effect of Root Zone Aeration on the Growth of Film-Mulched Tomato in Greenhouse
Authors: He Hua , Yi Xiao Hua
Published: October 2014

Due to film-mulched cultivation and poor irrigation practices, low oxygen stress could be often caused in root zone in greenhouse, and has negative effects on crops growth. In this study, a barrel experiment was conducted to probe the effects of root zone aeration on tomato (Lycopersicon esculentum Mill) leaves, root systems and biomass accumulation, using calcium peroxide (CaO2) as oxygen release agent. The results show that i) root zone aeration has little effect on the number of leaves and leave chlorophyll content, while reduces leaf areas of per leave and per plant, ii) root zone aeration could promote the growth and development of roots through increasing the volume, absorption area, specific surface area and total length of tomato roots and iii) root zone aeration raises the biomass of tomato plants, which mainly manifests in the increase of stems and leaves, especially in leaves.
Research on the Biological Properties of Scatella Tenuicosta Bennison in Seedling Production
Authors: Peng Jin Guang , Zhang Na , Li Qi You , Zhou Mo Bing , Shi Xian Feng , Tang Mi , Zhu Yong Sheng , Sun Yu Hong
Published: October 2014

This paper systematically described the biological properties of Scatella tenuicosta for the first time. The experiment result indicated that when temperature was set 20 °C from 7 am to 19 pm and 16 °C from 19 pm to 7 am, rhythmically across light day and dark night with 90% relative humidity, the development process of Scatella tenuicosta was as follows, egg period 2.8±0.7 d, larvae period 15.7±1.9 d, pupa period 4.5±1.5 d. The lifetime of adult male generally lasted 4 d or 5 d, the adult female 14-17 d, the longest even up to 22 days, including 14 day-long oviposition period. During the growth period of watermelon grafted seedlings (December to next March), 1 or 2 generations of Scatella tenuicosta would harm the seedlings, and 5 or 6 generations throughout the whole year. Besides, high temperature and drying environment would be conducive to the occurrence and threatening of the Scatella tenuicosta.
The Study on Key Factors of Soil Seed Bank in Vegetation Restoration
Authors: He Meng Xuan , Li Hong Yuan
Published: October 2014

The soil seed bank (SSB) is regarded as “potential genetic pool” of ground vegetation, which has functions of recalling vegetation history.In practical vegetation restoration engineering,the transplantation of alien species is the most popular method,which will influence the stability of ecological system.The soil seed bank has the advantage ofnatural regeneration,so it will become new afforestation materials.In order to enhance the feasibility of engineering application, orthogonal tests were set with three factors (the top soil thickness, the covering thickness and the number of adding seeds) and three levels.The results showed that:1) compared with blank tests,the orthogonal testshad improved species richness and density of soil seed bank significantly.2) the differences between nine plots in the number of germinated seedlings were very obvious,but in the number of arbor seedlings were not obvious.3)Overall,the Shannon-Wiener index, Simpson index and Pielou index were not high,the distribution of diversity indexes between nine plots was very even,the effect of three factors in the orthogonal testwas not obvious.4)The dominant factors of all the three factors was the topsoil thickness,for it determined the number of contained active seedsdirectly,but the specific influenceshould be determined by range analysis.
Landscape Spatial-Temporal Evolution and Ecological Effects in Kunming City over the Past Twenty Years
Authors: Yu Huan , Ma Jin , Ni Shi Jun , Li Ai Nong , Lei Guang Bin , Zhang Hai Dong
Published: October 2014

Landscape pattern change will cause flow and change of energy, material and nutrient between different units of land, and can cause regional ecological processes and systems functional changes. As the capital city of Yunnan Province and the southwest gateway to China, Kunming city landscape structure takes place significant changes under the high-intensity human disturbance, then the environmental effects are certainly very obvious. Based on the past two decades land cover changes of Kunming, study applies 10 types of landscape indices on class level and landscape level, analyzes the landscape changes of forest, grass land, water area, farm land, residential surface, industrial land and bare land from year 1990 to 2010, then explores the various types of spatial and temporal evolution of the landscape, the regional landscape effects on the ecosystem, and provides a scientific reference for understanding the trend of ecological environment and promoting the coordinated development of regional economy and environment.
Risk Assessment and Management of Geological Disaster Based on Risk Period Analysis and GIS in Loess Areas
Authors: Pan Wang Sheng , Lu Yu Dong , Guo Jin Yan
Published: October 2014

Aging characteristics and triggering mechanisms of geological disasters were analyzed to clarify the characteristics of geological disasters in loess areas, develop a geological disaster risk assessment system, and improve risk management of geological disaster. Risk periods of geological disaster were classified on the basis of disaster type, and a time-space coupling mechanism was applied to manage geological disasters dynamically. The risk period analysis was applied to risk assessment of geological disaster in Yaozhou District, Tongchuan City, Shaanxi Province. The risk period analysis may add a new element and promote improvements to practical applications of risk assessment system of geological disaster. According to this research results, new requirements for long-term supervision of farming activities and recommendations for an approval system for construction projects are suggested. In addition, geological disaster insurance product development is proposed.
Study on the Inversion of Atmospheric Aerosol Depth in Tianjin Based on the HJ_1_CCD Satellite Products
Authors: Xu Yan , Jiang Qi Gang
Published: October 2014

With the global climate change and air quality gradually become today's serious problems that affecting the quality of human survival and people's life, aerosol satellite remote sensing quantitative measure gradually become a trend. Taking Tianjin city as example, This article based on HJ moonlet using dark pixels and combined with 6s radiative transfer model, calculated the aerosol optical thickness on the day of December 26, 2013 of Tianjin. And use the CE-318 sun photometer observations on the inversion results of the verification, found that the inversion method was effective, its error is within 20% on the day.
Acute Toxicological Effects of Suspended Solids on the Nitzschia closterium
Authors: Yuan Yuan , Zheng Lin , Zhou Chun Ying
Published: October 2014

In this paper, the acute toxicity test were used to study the effects of different concentrations of suspended solids on the growth of Nitzschia closterium. The research result showed that the effects of different concentration of suspended solids on the growth of Nitzschiaclosterium were very significantly (P <0.01);The relationship between concentration of suspended solids and the inhibition rate of Nitzschia closterium growth were linear, the half inhibition concentration of Nitzschia closterium 48h-EC50 was 4.27g/L,r=0.9329, 96 h-EC50 was 4.47g/L,r = 0.9388.
Empirical Research of Demonstration Effect on Consolidation and Readjustment of Rural Land: A Case Study in Haiyan County
Authors: Xue Ji Bin , Jing Yu Jie , Jia Ke Jing
Published: October 2014

It is very helpful to carry out rural land consolidation and readjustment for the integration of urban and rural. The research purpose is to discuss about the influence factors of the motivation of rural residents who involved in rural land consolidation in Haiyan County of Zhejiang Province. The research methods include questionnaire survey, spatial analysis based on GIS and case analysis. The results show that if the two factors which represent the demonstration effect are considered, the Cox & Snell R2 raises from 0.36 to 0.46, and the Nagelkerke R2 raises from 0.51 to 0.65. The research conclusions show that the demonstration effect plays an important role in rural residents' decisions. And the conclusions will contribute to improve the efficiency of rural land consolidation and readjustment project.
Review on Promoting the Sustainable Development of Rural Tourism from the Angle of Community Participation
Authors: Han Bing , Sun Xiao Man
Published: October 2014

The related literatures in recent 20 years in China were reviewed. Research stage, content, area, and methods are analyzed. Research depth, range, method and case selection have been made progress, however, there still exist many problems. Research content is richer, but there are imitation and repeated researches. Some research contents are insufficient, such as resource combination and community participation integration, analysis of participation background, analysis of community environment, and the analysis of social culture influence. The countermeasures are not enough. The selected regions are widely but they are relatively concentrated, so the choice has certain limitations. The research method is mainly qualitative research, and less of quantitative research. It focused on description and theory analysis, so the method is single and the technical means is less.
Study on Urban Land Increment Mechanism: A Case of Hangzhou, China
Authors: Yuan Shao Feng , Wang Xue Chan , Li Fan
Published: October 2014

The land value increment is regarded as the reflection of social development and urban economy. With the speeding economic development, the urban land value soars rapidly. This paper, based on the land value increment situation of Hangzhou, summarizes the essence and characteristics of urban land value, analyzes the formation mechanism of land value increment, the interaction mechanism of the urban space and urban planning and real estate investment behavior.
Sustainable Development Strategy Research of Historical Village Environment - Take Huaiyin Village of Zhenjiang as Example
Authors: Huo Jun , Han Rong
Published: October 2014

The purpose of the study is to summarize environmental strategies and technologies for promoting better sustainable development of historical villages. The environmental investigation took Huaiyin village in china as a case, put forward tourism exploitation as the most suitable sustainable mode, and established an interactive circulating mechanism of protection, management and renovation. Based on the environmental elements framework, the specific development technologies can be divided into three areas: nonphysical environment, man-made environment and natural environment, including intangible cultural heritage protection, cultural value management, renovation of buildings, public space and traffic, the river system and greening improvement and environmental bearing capacity control. The results show that all these measures contribute to achieve the sustainable mode core – “symbiosis” of historical village’s spirit, morphology and ecology.
Research on Influencing Factors of Urban Color - Taking Changsha as an Example
Authors: Liu Sen , Zhu Song Ya
Published: October 2014

As an essential part in urban planning and design, urban color draws more and more attention in recent years. Urban color mainly includs natural environmental color and artificial color. Environmental color is mainly about the color of land and vegetation. While, artificial color means the color of buildings, advertisements, transportation and other artificial objects. This paper analyzes some influncing factors of urban color with Changsha taken as an example.
The Fractured Prediction for Narrow-Azimuth Seismic Data of Carbonate
Authors: Liu Zhong Liang , Zeng Yi , Liu Ju Jia
Published: October 2014

It is vital importance to understand distribution and development of carbonate reservoir fractures for studying carbonate reservoir. Stimulate and acceptance conditions of study area in the desert are poor, and The seismic data is characterized by narrow azimuth. Limit of data has influence on fracture prediction of target layer. In this paper, the post-stack and pre-stack seismic data were used. At first , techniques of stress field numerical simulation was applied to predict the distribution of tectonic crack of the study area ; Secondly, because of the characteristics of narrow-azimuth seismic data, the paper applied technology of near and far offset attribute discrepancy of pre-stack data to predict the degree of development of cracks. Finally, effective fracture was predicted on the basis of development of the forecasted cracks.
Inactivation of Giardia intestinalis by H2O2/O3
Authors: Li Shao Feng , Ran Zhi Lin
Published: October 2014

The objective of this study was to investigate the effect of H2O2/O3 inactivating Giardia intestinali (G. intestinali) by the fluorescence staining method and vitro excystation. Results suggested that hydroxyl radicals (•OH) was the principal factor during the H2O2/O3 process by testing the effect of t-butyl alcohol (TBA) and concentration change of H2O2. The inactivation rate achieved 99.6% when independent addition of O3 under 1.5 mg·L-1 with contact time about 10.0 min. While to achieve the same inactivation effect by H2O2/O3, 1.0 mg·L-1 O3 ([H2O2]/[O3] molar ratio = 0.8) with 7.0 min was required. The inactivating capability was stronger under acidic condition than in alkaline environment. The effect of turbidity was also found to be significant in synthetic water, when turbidity increasing, the inactivating effect declined. Inactivation rate was improved with a temperature increase from 5 to 35 °C. When dissolved organic matter concentration in the reaction system increased, the competitive reaction between G. intestinal and organics with H2O2/O3 probably took place, thereby reducing the inactivation rate.
Ways and Countermeasures to the Ecological Development of Mineral Resources Industries in West China
Authors: Cai Shao Hong , Liu Wen Jiang , Xiang Qiu Lan , Lu Yang
Published: October 2014

Under the background of low-carbon economy, the researchers analyzed the situation of the development and utilization of mineral resources in West China, and the existing problems. By comparing industrial organization models and synthetically efficient analysis of different organization models of production for resources industries, ways and countermeasures to the ecological development for the mineral resources industries in West China were put forward, in terms of the transformation of organization models of industrial clusters, integration of industrial cycle organization models, reconstruction of industrial ecology organization models and so on.
Research of Application on Robot Vision with SQI Algorithms Based on Retinex
Authors: Yu Hui Jun , Chen Cai Biao , Wu Wan , Zhou Zhi Wei
Published: October 2014

Troubleshooting and safety monitoring in the underground mine by manual operation often have the existence of security risks, so the trend of replacing manual operation by robots increases. In robot vision navigation, image enhancement in the automatic target recognition is the most critical stage of the pretreatment when extracting the image feature and matching. As the contour enhancement effect of multiscale Retinex algorithm is very good, which plays a key role in the robot visual scene image. When underground mine mobile robot identify path in machine vision navigation, this paper proposes a application of robot vision with SQI algorithms based on Retinex, which aims at its poor real-time performance and serious affecting by light interference.
Reservoir Physical Property and Controlling Factors for the Lower Youshashan Formation in Youshashan-Dawusi Area, Southwestern Qaidam Basin
Authors: Chen Guo Min , Liu Quan Wen , Xia Min Quan , Bao Xiang Sheng
Published: October 2014

The core data, casting thin sections and scanning electron microscopy are used to study the clastic reservoir characteristics and controlling factors of reservoir growth. It indicated that the main reservoir rock types are lithic arkose, Feld spathic sandstone, and a small amount of feldspar lithic sandstone, and with compositional maturity and low to middle structural maturity. Moreover, the primary reservoir space types are mainly intergranular pores, secondary are secondary pores, and reservoir types belong to the medium-high porosity and permeability, and the average porosity and permeability of lower Youshashan formation are 17.70% and 112.5×10-3μm2 separately. Furthermore, the reservoir body is mainly sand body result from deposits of distributary channel and mouth bar of which belong to the braided delta front, and the planar physical property tends to be better reservoir to worse reservoir from northwest to southeast. Finally, mainly factors to control the distribution of reservoir physical property, are the sedimentary environment and lithology, were worked out.
Optimization Coal Pillar Size of Top Coal Caving Face with Dynamic Pressure Impact
Authors: Li Wen Zhou
Published: October 2014

AH Wilson coal pillar was used widely as it’s simply, but it’s appeared large error for field implementation as its difference assume conditions, mine depth H and mine thickness m. AH Wilson coal pillar formula was studied precisely by in-site stresses test and numerical simulation analysis for N3-5 top coal caving working face of CHANGCUN coal mine in Lu’an coal district of China, then modified AH Wilson formula was put forward as L = 0.008mH + 8.4,then the precise coal pillar size 18m was used in filed implementation, filed testing proved coal pillar size was reasonable.