bluuebunny/crossref_metadata_2025 huggingface dataset:
The Design of Patrol System Based on Image Acquisition
Authors: Li Guo Xin , Lu Jian Wei
Published: December 2013

This article presents the design ideas of patrol system based on real-time image acquisition in patrol points. In this system, the image acquisition terminals are mounted on many patrol points, which are set in a predetermined patrol line. When patrol officers arrived at a patrol point, the image acquisition terminal mounted on the patrol point will capture a live image via a GPRS MMS module ,and then the image acquisition terminal sends this image to the central control unit in a form of MMS. The central control unit receives the sent MMS message, and separate out the image information from the received message, and then saves it to a database. According to the actual test results of this patrol system, it can not only meet the design requirements, but also the whole system has a high stability and reliability.
Technology of Image Compression Coding Based on Walsh Transform
Authors: Li Yu , He Lin
Published: December 2013

With the rapid development of the Internet era, in order to improve the speed of image transmission and storage, this paper presents a new method to use Walsh transform on data block which size is not 2n. And this paper focuses on the research of Walsh transform application in color image compression coding. The method is simple and can get good result through the experimental simulation.
Contact Stress Analysis of Packer Rubber Based on ANSYS Software
Authors: Li Teng , Mu Le , Wang Xian Da , Feng Bo , Jin Zi Yi
Published: December 2013

In this paper three-rubber compression packers are regard as study objects, hyper-elastic constitution equation Yeoh has been used, the ANSYS mechanical model of packer rubber has been established by ANSYS software, the influence of axial setting force and frictional coefficient on the contact stress of packer rubber has been analyzed. The research results indicate that with the increasing of setting force, the axial compression amount and Von Mises stress increase; with the increasing of frictional coefficient between rubber and casing, the Von Mises stress of the intermediate rubber decreases slowly.
The Developmental Research of HeBei Province High Level Innovative and Creative Talents on the Cooperative Development of Beijing, Tianjin and HeBei Province
Authors: Zou Na , Wu Bo
Published: December 2013

Analysis of the current situation of regional talent cooperation with the development of Beijing is carried out, with the development of Beijing-Tianjin-Hebei region integration as the background. It turns out that the Hebei province is obviously in inferior position in regional talents co-operation. Standing on the point of cooperative and regional development of Beijing, Tianjin and Hebei regional, the paper puts forward the strategies of talent development and counter measures, which stressed the core of Hebei province lies in the development of high-level innovative and creative talents.
The Niche Vision of the Development of Higher Education for the Deaf in China
Authors: Wang Yan , Han Mei , Zhang Xue Hui
Published: December 2013

The development of higher education for the deaf has always been concerned by countries , many scholars have carried out analysis and research from different aspects.The paper from a new Angle of view about the ecological niche theory, illustrate the relationship between ecological niche theory and the development of higher education for the deaf in China, and the ability to adapt to ,improve ability and possess ability as the three important ecological factors in the development of higher education of the deaf.
The Research on the Teaching Model of Operations Research
Authors: Wang Yu Mei , Li Qiang
Published: December 2013

Operations research courses teaching process often prone teaching purposes is not clear enough, is not quite appropriate choice of teaching content, teaching methods are not flexible enough, and less use of the computer and the network means, not suited with modern management. Departure from operations research teaching characteristics for students the logistics thinking skills, practical application ability and practical ability to cultivate and improve the use of Case Method, interesting teaching methods, computer "partner" pedagogy of these three kinds of teaching methods and classroom questions Lesson assignments, to adapt arrangements quiz three teaching control means. Will overcome the problems and shortcomings of operations research teaching process, for management class operations research teaching reform ideas..
Study on Optimum Installation Angle of Photovoltaic Module Considering Sunlight Reflection
Authors: Saito Kazuo , Abdullah Khir Muhammad Taufiq Bin , Son Tran Nam , Jiang Wei Hua
Published: December 2013

This paper shows photovoltaic (PV) power generation systems in Nagaoka University of Technology. On the basis of acquired data, installation angle of PV module and effect of sunlight reflection in winter are examined. Consequently, it is cleared that there is the optimum angle for each season, and the reflection against snow is very effective for the PV power generation. The angle usually depends on the latitude of location, but taking account of this effect, suitable installation angle changes. It implies that the optimum angle of all year round has flexibility. Actually, we can get about the same electric power when the angle is between 30 and 60 degrees.
Research of the Effect Factors of College Graduates' Employability Based on the Perspective of Education
Authors: Wang Shi Tong , Xie Ai Guo
Published: December 2013

Employability was the core of college graduates' successful employment influence factors. Based on the USEM model and selecting factors of college graduates' employability and adding latent variables of education resources, research established conceptual model of college graduates' employability. The results of 7 facts showed that the fit indicators of the model proposed by this research had high goodness-of-fit. Finally, the paper analyzed the practical significance of this model.
Research on the Contribution Degree of China’s Auto Industry
Authors: Wang Zai Tang , Wang Na
Published: December 2013

Automobile industry has the characteristics of the high concentration, strong relevance, value chain length, complexity of technology. Because of the high relevance and strong ripple effect, auto industry plays a huge role in the social and economic development. In this paper, through calculating the input for the auto industry's contribution rate, put forward to promote the auto industry development policy recommendations.
Effect of Wind Farm on Transient and Small-Signal Stability Based on BPA
Authors: Bian Xiao Yan , Yang Li Ning , Huang Xin Xin , Fu Yang
Published: December 2013

Large scale wind farm output variation always deteriorates the system stability. To study this problem, this paper builds the model of power system with the integration of large-scale wind farm based on BPA. The simulation results show that large oscillations of voltage and rotor angle of system will happen, when three-phase short circuit fault occurs on the main line for transmitting wind power. With wind farm output decreasing, the transient stability and small-signal stability of power system will be improved.
Sensorless Control of Doubly-Fed Induction Generator Based on Adaptive Sliding-Mode Observer
Authors: Wang Qing Long , Yang Shu Ying
Published: December 2013

In this paper, a rotor flux based variable-structure model reference adaptive system (MRAS) observers is proposed for speed observer in a sensorless controlled doubly fed induction generator (DFIG) aligned with the stator flux. In the strategy, two rotor flux models with different structure are used. The rotor flux voltage model without including rotor position item is used as reference model, and the rotor flux current model including rotor position item as adjustable model. A slide-mode surface is formulated from the errors between the two models, and the rotor speed estimation can be obtained by a sliding mode algorithm. Meanwhile the one order inertial link is used to avoid suffering from integrator drift effects in voltage model. Simulation results confirm the validity of the approach.
The Time Domain Analysis of the Flutter of Wind Turbine Blade Combined with Eigenvalue Approach
Authors: Wang Hao , Ding Jiao Jiao , Ma Bing , Li Shuai Bin
Published: December 2013

The aeroelasticity and the flutter of the wind turbine blade have been emphasized by related fields. The flutter of the wind turbine blade airfoil and its condition will be focused on. The eigenvalue method and the time domain analysis method will be used to solve the flutter of the wind turbine blade airfoil respectively. The flutter problem will be firstly solved using eigenvalue approach. The flutter region, where the flutter will occur and anti-flutter region, where the flutter will not occur, will be obtained directly by judging the sign of the real part of the characteristic roots of the blade system. Then the time domain analysis of flutter of wind turbine blade will be carried out through the use of the four-order Runge-Kutta numerical methods, the flutter region and the anti-flutter region will be gotten in another way. The time domain analysis can give the changing treads of the aeroelastic responses in great detail than those of the eigenvalue method. The flap displacement of wind turbine blade airfoil will change from convergence to divergence, and change from divergence to convergence extremely suddenly. During the flutter region, the flutter of wind turbine blade will occur extremely dramatically. The flutter region provided by the time domain analysis of the flutter of the blade airfoil accurately coincides with the results of eigenvalue approach, therefore the simulation results are reliable and credible.
Multi-Objective Optimal Dispatch of Power System with Wind Power Based on Improved Particle Swarm Algorithm
Authors: Zhang Yi Hui , Hu Zhi Jian , Gong Xiao Lu , Zhang Meng Lin , Wang He , Yan Li
Published: December 2013

With the increase of its proportion in power system, wind power not only brings economic and environmental benefits but also the potential security risks due to its fluctuation and uncertainty. In order to take the potential security risks into account, an environmental/economic/safe static dispatch (EESD) model of power system with wind power is built. A new multi-objective particle swarm optimization (MOPSO) algorithm with standby selection and micro variation is proposed to solve the model. Two cases with and without wind power are simulated with the standard IEEE-30 system. The simulation results validate the effectiveness of the proposed algorithm.
A Hybrid Short-Term Wind Speed Forecasting Model Based on Wavelet Decomposition and Extreme Learning Machine
Authors: Zhang Yi Hui , Wang He , Hu Zhi Jian , Wang Kai , Li Yan , Huang Dong Shan , Ning Wen Hui , Zhang Cheng Xue
Published: December 2013

This paper studied the short-term prediction of wind speed by means of wavelet decomposition and Extreme Learning Machine. Wind speed signal was decomposed into several sequences by wavelet decomposition to reduce the non-stationary. Secondly, the phase space reconstructed was used to mine sequences characteristics, and then an improved extreme learning machine model of each component was established. Finally, the results of each component forecast superimposed to get the final result. The simulation result verified that the hybrid model effectively improved the wind speed prediction accuracy.
Regional Wind Power Forecasting Based on Cloud Model and Wind Rate Vector
Authors: Liu Dun Nan , Hu Yu , Li Qun , Shao Guang Hui , Zhou Hai Ming , Li Dan
Published: December 2013

The accuracy of wind power forecast is important to the power system operation. A new prediction model is proposed based on cloud reasoning and wind rate vector , combining with the current and the historical change rule of wind speed, using the change rule of wind speed in a period of time to forecast the power gradient in a point-in-time, The wind turbine power prediction is discussed based on power gradient and power eigenvalue. Simulation results on the case study of historical wind speed and generated power data in some area in China demonstrate that the proposed methodology can improve the accuracy of wind speed forecast and has practical value, especially for the wind turning point.
The Calculation of Radiation and Optimum Tilt Angle on the Inclined Plane of South-Facing Collector in Winter Months
Authors: Huang Xiao Chun , Hu Ming Fu , Dong Fu Sheng
Published: December 2013

In solar applications, collectors are usually installed with a tilt angel to obtain the maximum amount of radiation. In this paper, the anisotropic model -Hay model was used to calculate the daily total radiation on the tilt face and theoretical analysis was used to get the optimum tilt angel of southern collector face in winter months. Then the diffused radiation on horizontal face was obtained by using the isolation between daily total radiation and daily diffused radiation. Computer program was written to calculate the month radiation under different tilt angel and the maximum angel corresponding to the maximum month radiation was found. At last, the two results were compared and analyzed.
Marginal Land-Based Biomass Energy Production in Yellow River Delta
Authors: Wu Cong Wen , Chen Xiao Bing , Sun Yun Peng , Jiang Ming Liang , Yan Kun , Zhang Li Hua
Published: December 2013

Energy crops are not only the key to the development of biomass energy, but also canpromote the improvement of saline and other marginal land and mprove the utilization efficiency.The rural biomass energy utilization status and characteristics of different energy crops and researchstatus in Yellow River Delta was introduced; Castor, switchgrass and sweet sorghum grown inmarginal land feasibility are discussed; Finally, the several suggestions of to promote biomassenergy and local marginal land development have been proposed.
Optimal Sizing of Battery Energy Storage System in Distribution Network
Authors: Ren Rui Huan , Hu Rong , Bin Liu
Published: December 2013

Economical value including reducing investment in generation side as well as transmission and distribution (T&D) side of the building capacity and decreasing the power expenses for important users brought by BESS are studied.Economic benefits obtained by BESS through decreasing loss of power grid and making use of time of use (TOU) price to reduce electricity tariff are analysed.Considering the primarily capital cost and operation and maintenance (O&M) cost,the capacity optimal allocation model for different types of BESS is developed under optimal conomy condition and genetic algorithm is used to solve it.
Simulation on Control Strategies of Hybrid Energy Storage
Authors: Cheng Hui Min , Wu Hong Bin
Published: December 2013

Hybrid energy storage system, applied in micro-grid, can bring a higher technical performance. A hybrid energy storage system, including batteries and super-capacitors, is presented in this paper. For maintaining the micro-grid stability, the control strategy of the hybrid energy storage system is divided into two layers: central control system and local control system. The central control system is used to calculate the total output power which the micro-grid wants, and the local control system is used to divide the total output power signal into a frequent fluctuant part and a smooth part, and control the super-capacitors inverters and the batteries inverters to output with these two power signals respectively. With the example system in PSCAD/EMTDC, it proves the effectiveness and feasibility of the control strategy.
Study of the Energy Consumption Characteristic of a 1000MW Ultra-Supercritical Unit
Authors: Pan Feng Ping , Chen Shi He , Zhu Ya Qing , Pang Zhi Qiang , Wu Shu Mei , Cao Ya Wen , Liao Yan Fen , Ma Xiao Qian
Published: December 2013

A 1000MW ultra-supercritical unit was studied to gain the energy consumption characteristics by means of thermodynamic analysis. Comparing with the designed conditions, the power generation efficiency under real operation is much less; especially under 50% and 100% rated loads. The higher superheated steam temperature and lower reheat temperature were found to explain that. At the real running, the higher superheated steam temperature induced more attemperation water, while reheat temperature lower than the designed point would decrease the power output. Aiming at solving issues about temperature control in unit operation, several details could be paid extra attention to. For instance, attemperating water comes from outlet of the high-pressure heaters would have a much slighter influence on generating efficiency.
Analysis of Cement Kiln Waste Heat Power Generation System Using the Exergy Analysis Method
Authors: Wang Jian Gang , Zheng Pu Yan , Zhou Zhi Yun , Yuan Yan Zhou
Published: December 2013

Power generation using waste heat from cement kiln can not only bring economic benefits to the enterprise, but also play an important role in environment protection. Constantly researches have proved that there is still large energy saving potential in its operation. In this paper, the waste heat power generation system was divided into several subsystems, and the exergy calculation model of each subsystem unit was established. Finally, the weakest part in energy use was found according to the results. It provides a scientific basis for performance improvement and energy saving transformation of waste heat power generation.
Review on the Heat Transfer Enhancement by Inserting Circular Cylinders
Authors: Bao Ya Yuan , Yuan Yin Nan , Xi Guan Nan
Published: December 2013

The paper presents heat transfer enhancement by inserting a cylinder as spoiler element. It has a great significance for engineering. But its mechanism is still not very clear. Aiming at this problem, numerical simulation and experimental study on heat transfer enhancement by single cylinder or multi-row cylinders are summarized in this research. And they are also compared with other shape components. According to the results, the developing trend of heat transfer enhancement by cylinders is pointed out.
A Numerical Study on Heat Transfer Enhancement of Automobile Thermoelectric Generator
Authors: Hu Wei Ping , Liu Wei Jun , Xu Cheng Long
Published: December 2013

The paper presents a numerical simulation to investigate the heat transfer enhancement of a rectangular pipe with longitudinal fins for the automobile thermoelectric generator. The fins were inserted near the pipe wall. The effects of flow rate (wi=10m/s-50m/s), fin length ( l=100, 133, 200, 400), fin spacing (d=20, 30, 40, 50), fin height (h=20, 30, 40, 50) on Nusselt number (Nu), friction factor (f) and overall enhancement ratios (ƞ) are investigated under constant wall temperature , using air as woking fluid. Number calculations were performed with FLUENT code. The obtained results reveal that all geometric parameters have important effect on the thermal performance of pipe, and the finned pipe show better thermal performance than smooth pipe. It is also found that the overall enhancement ratios increase with increasing fin length and fin height, also the overall enhancement ratios decrease with increasing fin spacing. All finned pipes have good heat performance with ƞ greater than 1. The best overall enhancement of 1.25 was achieved for wi=10m/s for which the fin dimensions is l = 400mm, d = 20mm, h = 50mm.
Development of Special Users' Energy Saving Potential New Intelligent Diagnosis Detector Based on DSP2812 Technology
Authors: Cheng Le Feng , Peng Jian Fu , Yu Tao
Published: December 2013

In order to solve the problem that special users energy saving potential is unable to diagnose automotive online, a new automatic diagnosis of energy saving potential method based on online DSP was proposed. This proposed method, together with a variety of techniques like modern power electronics, digital signal processing, high precision and fast sampling, high capacity storage, human-machine interaction technologies and so on, was applied to develop a corresponding special users energy saving potential diagnosis detector. The hardware design and DSP energy saving analysis software design of the detector were described firstly, and the results of field test were presented to demonstrate its feasibility. It is shown that, its advantages include easy-to-use, low cost, highly reliable, strong intelligence and easy to promote, thus can effectively improve the efficiency of electrical energy audit and the degree of information and automation.
Mechanism of Energy-Consumption Benchmark State for Coal-Fired Power Units with Varying Boundary
Authors: Zhang Yong , Fu Peng , Wang Ning Ling
Published: December 2013

The in-depth energy conservation of thermal power units is confronting new challenges under the varying operation conditions and ambient constraints. Compared with traditional optimal values, the description of energy-consumption benchmark state was proposed to describe the economic performance of thermal power units with the varying operation boundary, operation conditions and equipment performance. The energy consumption interactions of units were divided into 4 parts: parameters, equipment, subsystems and units. The models for energy-consumption benchmark states were established with the fuel specific consumption (FSC) setting as the optimization objective. Such a method was performed on a 600MW supercritical power unit and the results show that the energy-consumption benchmark state, which is related with the varying boundary, can reflect the boundary condition, operation lever and equipment performance. It makes significant reference for the energy-saving diagnosis and operation optimization of thermal power units under overall working conditions.
Analysis on Chilled Water Spraying through Extraction Opening in Condenser to Enhance Extraction Effect of Vacuum Pump
Authors: Fan Jun , Sun Feng Zhong
Published: December 2013

Non condensable gas (air) accumulating in the condenser will reduce heat transfer coefficient of condense and vacuum value, Reducing of condenser vacuum value will lower turbine efficiency. Chilled water spraying is adopted to cool down the steam before it is extracted through extraction opening in condenser so as to enhance extraction effect of vacuum pump. This paper gives analysis on chilled water spraying through extraction opening. Mathematic model of selected controlling volume near extraction opening is given. Maximum amount of spraying and its relationship with vacuum value and increment of extraction rate are also proposed.
Numerical Simulation of a Shell-and-Tube Heat Exchanger with Special Form Helical Baffles
Authors: Zheng Can , Wang Fei , Lei Yong Gang
Published: December 2013

A new type of helical baffles heat exchanger is presented in this paper. Comparative study, through numerical simulation, was undertook between the new helical baffles heat exchanger and segmental baffle board heat exchanger in shell side flow and heat exchange characteristics. Fluid medium in the shell side is air. At the same velocity in the same flow conditions, pressure drop of helical baffles heat exchangers fell by an average of 26.8% compared with segmental baffle board heat exchangers, and the unit pressure drop of the heat transfer ratio of helical baffles heat exchanger increased by an average of 40.6%.
Multi-Walled Carbon Nanotubes as Electrocatalyst Supports for H2O2 Reduction Reaction
Authors: Zheng Dan , Yang Ting Fang , Guo Zhang Fei
Published: December 2013

This work studies the use of Multi-walled carbon nanotube (MWCNT) as catalyst supports for H2O2 electro-reduction in acid media. Using impregnation-chemical reduction method, we prepared Pt-Ag/CNTs, Pt-Co/CNTs, Pt-Ag/C and Pt-Co/C nanocatalysts. Four catalysts were analyzed by XRD and TEM. Their electrochemical performance was studied via cyclic voltammetry curve. The results show that: the nanoparticles have a better dispersion on CNTs substrate than on XC-72 carbon substrate. Comparing with Pt-Ag and Pt-Co on XC-72 carbon substrate, the H2O2 reduction reaction activation energy of catalysts on CNTs substrate is bigger, and the peak current densities of catalysts on CNTs substrate are larger than that on XC-72 carbon.
Influence of Ethanol Catalyzed Oxidation on the Activity of Pd/C with Different Ratio of Pd and Carbon
Authors: Dai Zhong Xu , Tian Dan Ni , Zhang Xin , Gong Si Lin , Yang Chang Ying
Published: December 2013

To investigate the influence of ethanol catalyzed oxidation on activity of Pd/C with different ratio of Pd and C. Pd/C catalyst samples with Pd loads of 20, 30, 40 and 50 wt% were obtained by chemical reduction reaction of PdCl2 and NaBH4. The samples morphology and structure were characterized by XRD and SEM. The electrocatalytic oxidation activities of ethanol were examined by cyclic voltammetry in alkaline media. The results show that a face centered cubic (FCC) Pd phase can be identified in the sample powders. The average particle size of the Pd/C powder is about 10 nm. The performance of ethanol oxidation on 40 % Pd/C electro-catalyst is better than that of the other Pd/C samples.
Finite Element Analysis of Piezoelectric Materials
Authors: Zhang Ai Guo , Yang Tie Jun , Du Jing Tao , Lv Peng , Li Xin Guang
Published: December 2013

The ANSYS finite element techniques were used for modeling and analysis of piezoelectric materials. The single piezoelectric sheet model was presented. The basic characteristic of the piezoelectric materials were analyzed and the affecting factors of characteristics were derived. The high frequency simulation results showed that the displacement responses of piezoelectric materials were very large delay in boost and buck under the high frequency voltage signal, and that was adverse to the vibration control. The low frequency voltage simulation results showed that the displacement response frequency and voltage signal frequency were exactly the same. The model thickness greatly affected its stiffness and indirectly affected its output characteristics.
Crystallization Behavior and Infrared Radiation Properties of Copper Ferrite-Doped MgO-Al2O3-SiO2 Ceramics
Authors: Wu Xiao Yan , Yu Hong Bing , Dong Heng
Published: December 2013

MgO-Al2O3-SiO2 ceramics were recently explored as infrared radiance materials to provide an environmental friendly energy candidate for industrial heating and drying. Cu ferrite was selected to dope MgO-Al2O3-SiO2 ceramics, forming a series of composite ceramics via solid-state reaction method to enhance the infrared radiation properties. The phase identification and morphologies of the samples were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. The infrared emissivity was examined by Fourier transform infrared (FTIR) spectrometer. The results showed that an improvement of infrared radiation properties can be achieved by doping Cu ferrite in MgO-Al2O3-SiO2 ceramics. With increasing the dopant content from 0 wt % to 10.0 wt %, the crystallization behavior changed accordingly. A positive correlation was found between the infrared emissivity and the lattice strain. The highest infrared emissivity (0.91±0.01) was obtained after sintering at 1150 °C for 2 h with Cu ferrite content was 7.5 wt %, in which the maximum lattice strain (0.282 %) occurred. MgO-Al2O3-SiO2 ceramics doped with Cu ferrite have potential for the application of infrared heating and drying fields.
Growth of Thick Ge Epilayers on Si(100) Substrates Utilizing Two-Step Approach by Ultrahigh Vacuum Chemical Vapor Deposition
Authors: Zhou Zhi Wen , Zhang Yue Zhong , Shen Xiao Xia
Published: December 2013

Ge epilayers on low temperature (LT) Ge buffer layers were grown by ultrahigh vacuum chemical vapor deposition using the two-step approach. Effects of the growth temperature and the thickness of the low temperature Ge buffers were studied. It was demonstrated that it was unable to obtain flat LT Ge buffers just through lowering the growth temperature due to the ultraslow grow rate that 3D islands formation couldnt be prohibited. However, the rough LT Ge surface was smoothed by subsequent growth at elevated temperature if the LT Ge layer was thick enough and the compressive strain was relaxed largely, and the detrimental Si-Ge intermixing was effectively prohibited as well. When using proper growth conditions for the low temperature Ge buffer, thick Ge epilayer with a low threading dislocation density and a smooth surface was obtained.
Analysis on the Micro Surface Morphology of Aged Oil-Paper Used in Power Transformer
Authors: Tang Chao , Dai Sheng Li , Li Jiao
Published: December 2013

In order to analyze the ageing mechanism of oil-paper, the Atomic Force Microscope (AFM), which is one of the important instruments in nanometer area, was used in this paper for the analysis of the micro surface morphology, and a 3-D surface roughness analysis on the AFM image was presented. The AFM figures indicates that the molecular arrangement of the initial cellulose paper is close and ordered, some of the hexagonal mesh structures of the D-glucopyranose units were broken down after 100 days accelerated thermal ageing. The roughness analysis indicates that he fiber surface roughness parameter Sa increases with the deepening of ageing degree. Special attention should be paid on the increase in the surface roughness of insulation paper, as it will aggravate the oil streaming electrification when the paper is applied to the power transformers.
Optimization of Zinc-Cadmium Reduction Method for Determination of Nitrate in Seawater
Authors: Sun Hui Fang , Wang Hai Wen , Yuan Chun Ying
Published: December 2013

The linear of nitrate standard curve and blank values were ​​affected by many factors such as blank water quality, temperature, etc. The seawater determination of nitrate optimization methods in this paper based on the GB "marine monitoring specification (seawater analysis)"GB12763.4-2007. It indicated that doubly distilled water with excellent pure sodium chloride for preparation of artificial seawater produce a good linear of standard curve and lowest blank value at 20 °C -25 °C.
Trace Element Variations in the Jianghan Basin: Response to the Water System Evolution of the Upper Yangtze River during the Early Pleistocene
Authors: Yuan Sheng Yuan , Wu Guo Xi
Published: December 2013

According to the characteristics of constant order in sequential clustering method, it takes a layer division of vertical section of drilling sediment, by taking the 46 geochemical test sample in the Jianghan Plain Zhoulao drilling as the research objects and on the basis of mathematical theory of sequential clustering. Due to the implication function of the division results in sedimentation process and geomorphic evolution, it can be speculated that the sedimentation in the Jianghan Plain may reveal the four stages since 2.77~2.68 Ma B.P., 2.68~2.23 Ma B.P., 2.23~1.25Ma B.P. and 1.25 Ma B.P. to present which corresponds to the evolution process of the river system from unstable to mature. It suggests the drainage area becaming larger that the dispersion degree of the trace elements compositions of these samples became less, REE, Y, Th, U) and Th/Sc, Co/Th, La/Sc, Cr/Cu ratios become smaller in the Pleistocene.
Evaluation of the Ecological Security in Shiyang River Basin Based on Grid GIS and PSR Model
Authors: Wei Wei , Xie Bin Bin
Published: December 2013

With the support of GIS technology, in this paper, each index in the evaluation system was set to the spatial expression of 100m×100m grid scale. Subsequently, the spatial principal component analysis and hierarchy process-combination weighting method were used to express the spatial distribution of regional ecology security in study area. Some results show that:(1)The spatial distribution differences of regional ecology security are very obvious. (2)The maximum of SESI is 87.14 in Liangzhou District and its surroundings. Comparatively, the minimum value is 43.96 in north Minqin and edge of Tengery desert. This weakens interaction on ecological flowing in the basin as well as the capacity of ecological restoration between landscape patches. So the polarization of the watershed ecological security will become more seriously. (3)The ecological security and sustainable development of Shiyang River Basin are still in class of III(Threaten security) and class IV(insecurity).
An Analysis of Water Consumption and Pollution with the Input-Output Model in the Haihe River Basin, China
Authors: Qin Chang Bo , Jia Yang Wen , Su Z. , Bressers Hans T.A. , Wang Hao
Published: December 2013

It is widely believed that the economic success in China is achieved at the expense of natural resources and has resulted in severe pollution of the environment, especially water resources. This study applies a hybrid input-output (IO) model linking economic and ecological systems in order to analyze water consumption and wastewater discharge in the Haihe River Basin. Within the environmental IO framework, a series of assessment indicators is calculated to assist in tracking both direct and indirect effects of freshwater consumption and wastewater discharge in the economic sector, as well as to distinguish the economic sectors that have greatest influence on water demand and pollution. Assessment results indicate that water consumption and pollution can be reduced by readjusting the structure of production, consumption and trade in the Haihe River Basin. It is concluded that in order to achieve sustainable development in the Haihe River Basin with its very poor water endowment, not only the direct but also the indirect effects on water demand and pollution should be considered when production, consumption and trade policies are formulated.
Assessing the Impacts of Urbanization on the Ecosystem Services of City in Northwestern China: Case Study of Xi'an
Authors: Ding Xiao Hui , Zhao Wei , Zhong Wei Zhou , Xing Zhi Bin
Published: December 2013

Recently, the urbanization process in cities of developing countries has been at an unprecedented scale. However, this process is more under economic development-driven rather than a sustainable way, and has exerted huge pressures on nature ecosystem of cities. In this research, we try to assess the impacts of urbanization on the functionality of ecosystem in cities in northwestern China, through applying remote sensing technology and estimating changes of ecosystem services value (ESV) of a city during the urbanization process. A case study has been taken in Xian, a major city of northwestern China. Results revealed that the ESV of Xian has opposite trend of urbanization rate, and the urbanization process has significantly jeopardized the integrity and functionality of the ecosystem of Xian.
Research on Eco-Campus and its Evaluation Method
Authors: Yao Cai Yun , Jin La Hua
Published: December 2013

With expansion of enrollment scale, many universities make a large-scale expansion of their campus in recent years, which has caused a series of ecological problems, such as excessive occupation of land, destruction of local ecological environment. It is necessary to provide ecological level assessment and guidance for this eco-campus construction. Based upon the present related research at home and abroad and according to the basic principles of ecology, we have given a clear definition of ecological campus after considering the functional requirements for university campus at first, and then build an ecological campus evaluation index system in which the landscape ecology and the ecological footprint theory have been combined and clear the scoring method of each index. The index system includes five aspects: campus environmental quality, pollutant emissions, resource allocation and utilization, humanity landscape and greening, environmental awareness and environmental education. Furthermore, the analytic hierarchy process (AHP) is applied to this system to obtain the relative combined weights of every index which has passed the combined verify of coherence. Then the multi-factor comprehensive evaluation method was adopted to calculate ecological level index of eco-campus. At the end of this paper the main campus of Jinan University has been taken as an example application analysis of the index system.
Iron Filings as PRB Media Regression Analysis of Remediation of Chromium-Contaminated Groundwater
Authors: Han Zhi Yong , Wei Xiao Bin , Du Wang Bing
Published: December 2013

Regarding the iron filing as PRB padding media, this experiment researched the repair effect of iron filing to the groundwater polluted by Cr on condition that different initial concentration of Cr6+ and different flow velocity, and then with the help of the data regression analysis software SPSS、1stOpt、Excel etc, it studied the regression analysis of Cr6+ removal rate with the change of initial concentration and the flow velocity. The results indicated that: under the certain flow velocity, cubic polynomial is the best regression model of Cr6+ removal rate with the change of initial concentration;under the certain initial Cr6+ concentration, the change of Cr6+ removal rate with flow velocity can be fitted in the regression model of unitary linear well, and the decision coefficient R2of it can be up to above 0.9.
Preparation of Modified Ti/SnO2 Electrode and its Application to Degradation of Simulated Pesticide Intermediate Wastewater
Authors: Wang Shuo , Li He Sheng , Wei Xin , Yan Jin Long , Ding Cheng , Chen Song
Published: December 2013

Three kinds of Ti/SnO2based electrodes were prepared by thermal decomposition method. The surface morphologies were characterized by SEM, the electrochemical properties were investigated by linear scan voltammetry, CV(cyclic voltammetry), constant current electrolysis. The results show that Ti/SnO2-Ru/SnO2-Ce electrode exhibits high oxygen evolution potential and excellent performance of hydroxide radical generation. The removal ratio of 5, 7-dimethyl-2-mercapto-1,2,4-triazole pyrimidine as pollutant in simulated wastewater is up to 89.7% and of COD is 40.4%.
An Investigation of the Efficiency of Fulvic Acid and Straw Water Amendments for Arsenic Uptake from Groundwater by Vetiveria zizanioides
Authors: Zhuang Zhao , Hazelton Pamela
Published: December 2013

The aim of the research was to investigate the efficiency of fulvic acid or straw water as an alternate amendment to chelating agents, to enhance the uptake of arsenic from groundwater by Vetiveria zizanioides. Fulvic acid and straw water were applied separately to arsenic-contaminated groundwater at different concentrations (0.1% and 0.01%). It was found that when the higher concentration (0.1%) of straw water was added to the groundwater solution, the efficiency of arsenic accumulation by roots was increased by 47.8%. Straw water not only enhanced the growth of Vetiveria zizanioides but also improved arsenic accumulation in both the shoots and roots. In contrast, the addition of fulvic acid (at high or low concentrations) resulted in the reduction of the growth Vetiveria zizanioides. Specifically, a high concentration (0.1%) of fulvic acid reduced arsenic accumulation in the roots whilst a low concentration (0.01%) of fulvic acid decreased arsenic accumulation in shoots.
Assessment of Eco-Environmental Quality of Shiyang River Basin Based on GIS and Combination Weighting Method
Authors: Wei Wei , Shi Pei Ji , Zhou Jun Ju , Xie Bin Bin
Published: December 2013

The study takes Shiyang River Basin as a study area, and bases on resource environment-population, social economy-ecological environmental stress and response, and combines the present situation of ecological environment in Shiyang river basin as well as its influencing factors to construct the comprehensive evaluation index.The results show that:(1)The quality of eco-environment in Shiyang River Basin is low, and it shows the descendent trend year by year. The comprehensive evaluation index of ecological environment decreased from 5.05 in 2000 to 3.70 in 2012.(2)Seen from spatial distribution, the order of the descending degrees of the comprehensive evaluation index of ecological environment in Shiyang river basin in recent year is Yongchang County, Su yugur autonomous county, Liangzhou district, Gulang county, Tianzhu Tibetan autonomous country, Minqin county and Jinchuan district.(3) Inside the Shiyang River Basin, because of the dual effects from natural conditions and human activities, the eco-environment in the main ecological barrier regions such as Minqin and Wuwei oasis have changed obviously, especially in MinQin oasis.
Preparation and Visible Light Photocatalytic Activity of Bi2WO6 Hollow Microspheres
Authors: Gui Ming Sheng , Wang Peng Fei , Yuan Ji Gang , Li Yan Qing , Zeng Wen Gang
Published: December 2013

Photocatalytic technology as a means of degradation of pollutants had been widespread concerned. In the past three decades, titanium dioxide (TiO2) has become one of the most extensively studied metal oxides because of its excellent photocatalytic activity and photoinduced hydrophilicity[1,. But TiO2only absorbs wavelengths in the near-UV region (λ<400nm), which is about 3% of the solar spectrum and 53% visible light was can not efficiently utilized for the degradation of organic pollutants. Therefore, it is crucial to explore visible-light-induced photocatalysts. In recent years, in addition to traditional oxides, some complex oxides have been found under visible light driven have a good photocatalytic activity, Such as, N-doped TiO2[, BiOX (X=Cl, Br, I)[, Bi2MoO6[and so on. Nevertheless, such efforts have not achieved satisfactory results aspects of making full use of the visible-light. Therefore, it is still a great challenge to design efficient visible-light driven photocatalysts.
Study on Corrosion Scale Inhibitor for Blast Furnace Gas TRT System
Authors: Zhou Fu Rong , Zhang Hu , Du Guang Wu , Wang Wen Hua
Published: December 2013

Cyclohexylamine, morphine, ethanolamine, propiolic alcohol, seventeen alkenyl amide ethyl imidazoline, water depolymerization malaya acid anhydride, etc were chosen as the raw material of corrosion scale inhibitor in view of corrosion scaling reason and characteristic of blast furnace top gas pressure recovery turbine unit. The optimized formula of corrosion inhibitor have been obtained through orthogonal experiment. Corrosion and scale inhibitor performance were evaluated respectively by static weight-loss method, dynamic weight-loss method and calcium carbonate deposition. The results show that when these components are reasonable distributed, the corrosion effect is satisfied. When water depolymerization malaya acid anhydride is combined with the corrosion inhibitor, the corrosion and scale inhibition efficiency of composite inhibitor are more than 90%. Simulation blast furnace gas is adopted in dynamic simulation experiment, the corrosion inhibition efficiency is over 92%.
The Emission Control Technology of PM2.5 from Coal-Fired Plant
Authors: Pan Wei Guo , Shi Chao Lin , Li Fu Xiao , Luo Han Cheng , Guo Rui Tang , Ding Hong Lei , Hong Jie Nan
Published: December 2013

A major source of PM2.5is the combustion of coal-fired power plant, so its very necessary to monitor and control the emission of PM2.5form power plant. This paper summarizes the main emission control technologies of PM2.5for coal-fired plant. As the traditional electrostatic precipitators has low removal efficiency of submicron particles, so we improved the supply conditions of the precipitator, and pre-charged to improve the particle properties. Through this article, we know that using electric coagulation technology to control the particles form plant is practicable, and it has a good prospect for development.
Exploring of Desulphurization and Denitrification in Flue Gas Emission
Authors: Wang Li , Zhang Jie , Lin Qiao , Wang Jie , Zhou Yun , Hu Ning
Published: December 2013

The significance of desulphurization and denitrification is more obvious in removal SO2 and NOx from flue gas emission during coal combustion. This paper summarized the latest progress of desulphurization and denitrification on wet, semi-dry, dry and microbiological purification, simultaneously. It is pointed out that the development and application prospects of simultaneous desulphurization and denitrification treatment have favorable.
The Study of Degradation Characteristics of Isolated Pseudomonas Sp. LKY-5 on Dibenzothiophene
Authors: Li Lin , Zhao Chao Cheng , Liu Qi You , Zhang Yun Bo
Published: December 2013

Dibenzothiophene (DBT) may seriously pollute the environment with its mutagenicity, teratogenicity and carcinogenicity. And it is recalcitrant to be degraded by microorganisms due to its low bioavailability and high hydrophobicity. In this paper, the five parameters, namely, initial concentration, temperature, pH, agitation rate and inoculum size were experimented and studied by the isolated Pseudomonas sp. LKY-5 for degradation processes. The results shown that the initial concentration of 100 mg/L, temperature of 30°C, pH of 7.5, agitation rate of 160 rpm, inoculum size of 10 % were optimal for the biodegradation of dibenzothiophene.
Study on Photocatalytic Technology with Photovoltaic-Thermal Integration and its Applications in Indoor Air Purification
Authors: Hu Cheng Zhen , Cai Yan Nan , Wu Jiang , Yan Bi Chen , Qiu Xue Jun , He Hai Ting , Zhang Liu Liu , Yu Yue
Published: December 2013

In terms of energy and environmental purification, application of photocatalytic purification in energy and environment is getting increasingly widespread. In the present paper, it focused on the applications of photocatalytic technology in indoor air purification. Photocatalyst and photocatalytic reaction devices are the two issues in photocatalytic air purification. Fe-La co-doped TiO2 was prepared, and integration of photovoltaic-thermal circular photocatalytic air purification reactor was designed, which showed high air purification efficiency. The experimental data and theoretical analysis gave the support to exploit new indoor air purification technologies. Further, technical and economic analysis on photocatalysis technology with photovoltaic-thermal integration applying in indoor air purification was studied and helpful results were attained.
A Correlation Study between Polycyclic Aromatic Hydrocarbons in Urumqi Snow and the Surrounding Environment
Authors: Parida Yakup , Diwani Eslamjan
Published: December 2013

Based on the principle of solid phase extraction and the purification method using Florida silica, sixteen various kinds of polycyclic aromatic hydrocarbons such as naphthalene, acenaphthene and fluorene were measured in Urumqi snow by means of HPLC. The results showed that the concentration of PAHs was different in different sampling sites in Urumqi. The total concentration of PAHs was in the range of 0.2883 ~ 8.814 µg/mL and the content of PAHs snow was higher than that in water, which indicated that the snow was polluted by organic matters to a certain degree and the pollution was not so serious compared with the groundwater. So the snow has a certain application value for life.
The Effect of Iron Doping on the Performance of Mn/TiO2 Catalysts for NO Reduction with NH3 at Low Temperature
Authors: Hong Jie Nan , Pan Wei Guo , Guo Rui Tang , Zhen Wen Long , Yu Yue Liang , Pan Bing Chao , Wang Ai Chen
Published: December 2013

The catalysts of Mn/TiO2, Fe/TiO2and Mn-Fe/TiO2prepared by coprecipitation method were investigated for low temperature selective catalytic reduction of NO with NH3. The catalytic activity and SO2resistance of these three catalysts were tested and the properties of the catalysts were characterized by using N2-BET, XRD, H2-TPR, NH3-TPD methods. It was found that the doping of iron reduced the catalytic activity of Mn/TiO2catalyst at low temperature and also has an adverse effect for its SO2resistance at the same time. The decrease of surface area , redox ability and surface acid sites caused by doping of iron might be the main reasons for poor performance of this catalyst.