bluuebunny/crossref_metadata_2025 huggingface dataset:
Exergy Analysis of Concentrated Solar CHP System for Building Scale Utilization
Authors: Han Yan Min , Li Zheng Wei , Xu Peng
Published: August 2014

In this study, a kind of concentrated solar cooling, heating and power (CSCHP) system is analyzed by exergy method. When solar trough receiver obtains energy from sun and radiates heat energy to the external environment, the optimized operation temperature that balance the process is predicted based on exergy index and external environment temperature. For building scale utilization, A CSCHP system is further developed according to the thermodynamic cycle. It is found that the biggest exergy losses occurred in light-heat conversion, the best exergy efficiency is near 30% when the external environment is about 300K.
Power System Low Frequency Oscillation of Resonance Mechanism Induced by Disturbance of Turbine Governing System
Authors: Deng Xiao Wen , Cai Sun , Feng Yong Xin , Xu Yan Hui , Ma Cong
Published: August 2014

According to the resonance mechanism, power system forced low frequency oscillations can be aroused by power disturbance of prime mover. Therefore, the causes of turbine power disturbance were analyzed. The coupling model between turbine-governing system and power system was established in MATLAB. The possibility of governing system disturbance inducing the variation of control valve position and turbine power was researched in detail. The simulation results indicate that high level variation of control valve can be induced by the rotor speed deviation disturbance, if the speed-droop ratio of turbine-governing system is too small in local running position; power system low frequency oscillations of resonance mechanism might be caused by the disturbance of rotor speed deviation, when it’s frequency is close to power system natural oscillations frequency. Oil-pressure pulsation is easily happened in hydraulic governing system. If the frequency of oil-pressure pulsation is near to power system natural oscillations frequency, power system low frequency oscillations of resonance mechanism can be induced.
Simulation Study on Anomalous Commutation Failure in Multi-Infeed HVDC Systems
Authors: Li Hong Wei , Peng Gan Rong
Published: August 2014

Commutation failure theory in HVDC transmission system is proposed and its reason is analyzed. Anomalous commutation failure phenomenon related to concurrent CF or successive CF in multi-infeed HVDC transmission system is presented. Six kinds of ac system strength are used in simulating the anomalous commutation failure, and the results show that this phenomenon is more and more serious at first as the system strength increases, and then become less serious as the strength becomes stronger. The reason of anomalous CF is found when analyzing phase A voltage with Fourier analysis in one period after fault, that is because of the major dc components and the low-order harmonics existing in voltage waves.
Wireless Temperature Monitoring System Based on ZIGBEE
Authors: Chen En Xiu , Zhang Yong Jun
Published: August 2014

In order to solve the inconvenience of line arrangement under bad environment and the maintenance difficulty, a design method of a wireless temperature monitoring system based on ZIGBEE is given. The system uses RemoDAQ-8000 as temperature sensor and control platform, ZIGBEE wireless communication for wireless communication network. Through five groups based on ZIGBEE. The temperature control experiment, obtained the first-hand information, so as to realize the wireless monitoring; at the same time, the system can be in the local area network, using C/S and B/S two ways to control and query. Experiments show that using wire communication, ZIGBEE wireless communication instead of the traditional, can have an important effect in the field of process control
A Study on Porcelain Insulator Flashover Voltage Evaluation System on Atmospheric Pollution Condition
Authors: Gao Song , Tao Feng Bo , Liu Zhen Yao , Zhou Zhi Cheng , Wang Li Ming
Published: August 2014

The industrial development has been aggravating the atmospheric pollution increasingly. The pollution flashover has always been one of the most important problems that bother the development of electric power system in China. The key to prevent the happening of pollution flashover accident is that the electric power operation department can timely and correctly master the condition of external insulation of insulator string in operation to take measures before the happening of pollution flashover accident so as to prevent the happening of pollution flashover accident. The thesis introduces a set of pollution flashover voltage evaluation system for porcelain insulator which can anticipate the pollution flashover voltage of insulator and prevent the happening of the pollution flashover accident through monitoring the weather conditions such as the temperature and humidity, electric parameters such as the leakage current and circuit operating conditions such as the voltage class and type of insulator and considering their influences comprehensively. According to the set of pollution flashover evaluation system, we had a mass of tests in the thesis to fully verify the accuracy and reliability of this system that satisfy the requirement of electric power department.
Research on the Time and Space Characteristic of Argon Dielectric Barrier Discharge at Atmospheric Pressure
Authors: Liu Zhi Nan , Ge Hui Min
Published: August 2014

Numerical calculations with time dependant one-dimensional fluid model are performed at various conditions in argon atmospheric pressure to calculate electrical characteristics and plasma parameters including charged and metastable molecules densities. The simulation results show after steady discharge are formed, the voltage of discharge gap nearly remain constant and the phase is 0.36π advance of the applied voltage; The current density are in the same period as the applied voltage, the phase is 0.58π ahead of the applied voltage; The steady state Ar are in high number density in the whole discharge gap; The Ar* number density appear peak at the middle of the discharge gap; The Ar+number density appear peak in the negative bright area.
Research on Access Network Communication Technology for Condition Monitoring System of Power Transmission Line
Authors: Yang De Long , Tong Jie , Xu Gang , Liu Jin Long , Yang Lin
Published: August 2014

Power transmission line monitoring is a general appellation of automated monitoring and scientific management for power transmission line by advanced techniques, and it’s an important basis for achieving smart grid. Its data transmission system is divided into access network and data network, the access network consists of a variety of terminals, tower nodes and aggregation nodes, which includes on-site and remote networks. The application of flexible and reliable network would guarantee to achieve a high-speed, reliable and transparent data transfer between master station and terminals in the system. According to the data transmission requirements of transmission line condition monitoring system, this paper studies the communication network technologies for access network in the perspective of private and public networks, and after a comparative analysis of these technologies, it proposes a principle of how to select reasonable communication network technologies for different application scenarios.
Measuring and Evaluating Solar Radiative Properties of a Shading Plant
Authors: Wang Fang , Hou Fang Dong , Liu Xiao Qin
Published: August 2014

Tillandsia Usneoides (TU) is a kind of plant without root and can live without soil. It balances the conflict between urban greening and vertical development of urbanization compared to traditional shading plants. TU can be formed as plant curtain of any density, size and shape for vertical shading especially in high-rise buildings. This paper observes solar radiative properties of TU with experiments. The results show that the absorptivity, reflectivity and transmissivity of TU leaf are recommended as 0.64, 0.36 and 0.
A New Kind of Smart Dual DSP2812 Power Quality Monitor Based on Dedicated Users
Authors: Cheng Le Feng , Yu Tao
Published: August 2014

Focus on the increasingly prominent problems of power quality of dedicated users, study on solving electric energy problems, especially for harmonic pollution, was essential. This paper to study the method of testing and calculating electric energy index, then designed hardware to monitor and analyze power quality measurement data. The hardware was developed base on dual DSP2812, which was very advanced digital signal processing chip, and the hardware utilized high precision instantaneous synchronous sampling chip MAX1324, extended RAM and FLASH, RS232 communication circuit, high capacity SD card storage circuit, etc. The dual DSP power quality smart meter was tested and applied in dedicated users and its reliability, practicability, availability and accuracy was authenticated. This smart meter also has advantages of easy to carry, low cost, high precision, easy to promote, etc. can effectively meet power quality management of dedicated users.
Analysis on Capacity Evaluation Model and Optimization Algorithm for Meshed Power Collection Grid
Authors: Han Long Yan , Liu Lian Guang
Published: August 2014

To safeguard distributed power smoothly being sent out, the meshed power collection grids were proposed. By comparing reliability of radial and meshed grids, the capacity evaluation model for meshed power collection grids was established in terms of electricity revenue and cable costs, and the 2.5MW double-fed wind turbine’s evaluation data was divided into six levels according to 0-700 million income, and the capacity optimization algorithm was provided based on genetic algorithm, and optimal routing solutions and capacities under different income levels were proposed. The results show that 7 * 7 and 5 * 15 schemes have best income and capacity, and the effectiveness of evaluation model and optimization algorithm is proved.
Study on the Operation Electricity Price of Active Distribution Network
Authors: Song Xu Dong , Yu Nan Hua , Zhang Xiao Ping , Zhang Bin , Peng Xiao Tao
Published: August 2014

The active distribution networks (ADN) which based on the information communication technology and the advanced measuring instruments, provides a solution for the access of the high permeability DER. Electricity price, as an important means of operation for the distribution networks, has its significance to be analyzed. The paper makes a brief discussion about the operation mode of ADN, demonstrates the rationality to select electricity value equivalent price and real-time price as the feed-in tariff and operation electricity price, and validated by simulation.
The Comparative Analysis of the Stratospheric Airship Power Supply System
Authors: Zhang Cui , Qiao Kai , Wu Lei
Published: August 2014

The recycling energy problem is one of the key problems of the Stratospheric Airship. This paper analyzes the “night power supply system” of the Stratospheric Airship combining the energy storage device and its corresponding solar batteries. Compared with the Li-ion battery, Regenerative Fuel Cells have low energy conversion efficiency, resulting that the solar batteries combined with them for “night power supply system” have to be much heavier. Unless the specific energy and energy conversion efficiency of the Regenerative Fuel Cells improve obviously, it will not show much progress compared to Li-ion battery.
Determination of the Minimal Error of Power Consumption Forecast by Regression Analysis
Authors: Tavlintsev Alexander , Shorikova Maria
Published: August 2014

A procedure of estimation of the non-regular component of a power consumption schedule is described in this paper. A value of the non-regular component enables to evaluate the minimal error of daily-ahead power consumption forecast based on regression mathematical models. Evaluating calculations are given by the example of 10 regional power systems of Russia.
Molecular Dynamics Study of Thermal Conduction in Carbon Dioxide Hydrates
Authors: Wan Li Hua , Liang De Qing , Guan Jin An
Published: August 2014

Equilibrium molecular dynamics simulations that use the Green–Kubo method for sI CO2-hydrate systems from medium to full occupancy were performed to estimate the corresponding thermal conductivities at temperatures that range from 233.15K to 278.15K and pressures that range from 3MPa to 100MPa. Specific potential models for water and CO2were adopted. The effects of guest occupancy ratios and outside thermobaric conditions on CO2hydrate thermal conductivity were studied. The thermal mechanism was also analyzed. The thermal conductivities of hydrates of CH4, C2H6, N2, and O2were estimated. The size ratio of guest diameter to cavity diameter provided an adequate basis for understanding the thermal conductivities of gas hydrates.
Analyses on Effect of Helix Angle on the Continuous Helical Baffles Heat Exchanger
Authors: Zou Jia Zhu , Yuan Feng Wei , Hu Liang Bin
Published: August 2014

A numerical simulation for heat exchanger with continuous helical baffles was carried out. The study focuses on the effects of helix angle on heat transfer characteristics. The results show that both the shell-side heat transfer coefficient and pressure drop decrease with the increase of the helix angle at certain mass flow rate. The latter decreases more quickly than the former. The tangential velocity distribution on shell-side cross section is more uniform with continuous helical baffles than with segmental baffles. The axial velocity at certain radial position decreases as the helix angle increases in the inner region near the central dummy tube, whereas it increases as the helix angle increases in the outer region near the shell. The heat exchange quantity distribution in tubes at different radial positions is more uniform at larger helix angel.
Characteristic Analysis of the Influence of Flow Rate Distribution in Each Flat Tube of Parallel Flow Heat Exchanger to Heat Transfer
Authors: Yang Hai Jiang , Li Ming , Xue Xiao Ye , Liu Yan , Huang Kui
Published: August 2014

In this paper, the heat transfer rate of parallel flow heat exchanger was obtained in the condition of non-uniform flow distribution by 3D numerical simulation. The maximum theoretical heat transfer rate of parallel flow heat exchanger was obtained through 1D calculation. Ultimately, the correlation of the influence of non-uniform flow distribution on heat transfer efficiency was obtained by the comparative analysis of non-uniform flow distribution and heat transfer efficiency and regression calculation. It was found that the forecasted heat transfer efficiency error of correlation was within 2%.
Design of Water Resources Optimal Allocation Model of Sustainable Development
Authors: Hu Chang , Li Dang Sheng
Published: August 2014

According to the relationship between the sustainable development and the optimal allocation of water resources, the evaluation system based on the sustainable development of optimal allocation of water resources is established in respect of the index system water resources carrying capacity, the social economic and ecological environment. Henan is taken as an example to evaluate the sustainable degree with actual index value from the regional water resources supply and demand balance of simulation results. Its results have a guiding significance for the water resources planning, management and sustainable utilization.
Study on Soil and Water Loss of Black Soils in Northeast China
Authors: Hao Cai Lian , Xiao Wei Hua , Dang Xiao Fei , Shi Min , He Da Wei
Published: August 2014

The blacklands in northeast China is an important food producing area and marketable grain base, it plays an important part in the development of national food security. Serious losing of soil and water has become a bottle neck in the development of national economy for recent years. In order to understand the research trend on soil and water loss of Black Soils in Northeast China and to find its problems and shortcomings, the authors mainly analyzed the Present Situation and characteristics, the hazards, the causes, research methods and control measures of soil and water loss in blackland.
Variations in Proline Content of Salt Cedar (Tamarix chinensis) in Different Habitats of the Yellow River Delta, China
Authors: Yan Yan , Zhao Wei Na , Liu Hao , Zhao Lei
Published: August 2014

Understanding relationships between vegetation and its substrate environment is helpful for protection of ecosystem integrity. Substrate has been proved as one of good indicators to reveal the inherent interactions between wetland vegetation and its environment. A study was thus conducted to investigate the suitable soil environment for salt cedar (Tamarix chinensis) in order to predict its distribution in the Yellow River Delta in whichTamarix chinensishas been spreading in recent years. This study analyzed the soil parameters as environmental variations, and at the same time used proline content as a physiological indicator to illuminate the condition of theTamarix chinensis. The habitats were classified into 3 clusters at 95% confident level with K-mean clustering algorithm. The differences in soil conductivity, Cl-, NO3-, Na+and Mg2+among the three clusters were significant as revealed by ANOVA results. The distribution of these clusters and their soil variations were consistent, implying that the clustering illuminates the differences physically. Finally, a range ofTamarix chinensisleaf proline was settled and compared with the clustering results, and it was found thatTamarix chinensiscould have positive growth dynamic under moderate soil water and salinity conditions.
Study on Ground Penetrating Radar Signal Denoising Method Based on Surfacelet Transform and 3D Context Model
Authors: Liu Dan Dan , Yang Zhi Qiu , Tang Chun Rui
Published: August 2014

The ground penetrating radar and radar wave propagation in the subsurface environment is very complex. All kinds of noise and clutter interference is very serious, and detection echo data is a variety of with clutter. Therefore, the key techniques of data processing is to suppress clutter processing of ground penetrating radar record data. Surfacelet transform can efficiently capture and represent local surface singularities with different sizes. In order to improve the reliability of 3D ground penetrating radar detection results and accuracy, this paper presents a three-dimensional ground penetrating radar signal denoising method based on Surfacelet transform. Using Surfacelet transform and 3D context model for ground penetrating radar (GPR) analog signal to denoising, the noise in the case of low signal noise ratio (SNR) still can obtain a better result, and the simulations prove the effectiveness of the method.
To Create a Space of Enjoyment for Children: Space Analysis on the Outdoor Environment of Dongfanghong Kindergarten
Authors: Hu Yi Ran , Zhang Kai Li , Zhou Xi
Published: August 2014

Wave of urban construction commencing on the end of the 1980s has created significant influence on the environment construction of kindergartens currently. In consideration of ever-dwindling teaching land, how to apply scientific technology methods and spatial processing method to create the most enjoyable activity space will be the concentrated problems to be discussed by us. In this paper, Guangzhou Dongfanghong kindergarten is used as an example to analyze the outdoor environment space in details. And technology method is evaluated to get some enlightenment finally.
Study on Status Analysis and Countermeasures of Anhui Urbanization
Authors: Zhu Li Juan , Chen Lu Yao , Fang Ping
Published: August 2014

Urbanization is an inevitable path of economic and social development.It refers to the process which includes population aggregation to the city, expansion of urban scale and a series of economic and social change resulted from above. According to the general law of urbanization development, Anhui has entered the acceleration stage of urbanization. This paper attempts to analysis the situation of Anhui province in a comprehensive and system perspective, put forward empirical analysis of the situation, problems and the main constraints of urbanization of Anhui province, and then proposes the ways to speed up urbanization of Anhui province: powerfully develop the economy, strengthen the power base of urbanization; deepen reform of the system and promote the system innovation; adjust the industrial structure, vigorously develop the tertiary sector.
Application of Grey Correlation Analysis in the Priority Sequence of Mineral Resources Development
Authors: Lv Bo , Wang Guang Qi
Published: August 2014

Firstly, the evaluation system of the priority sequence of mineral resources development was constructed from five aspects as mineral resources endowment, market conditions, technical conditions, social and economic conditions and environmental protection conditions. Then, the priority sequence model of mineral resources development based on grey correlation analysis was proposed. Further, taken the mineral resources in Hebei province as an example, the empirical analysis of the above model was made. Results show that the suitability of the province's mineral development from big to small is, in order, molybdenum ore, cement-used limestone, iron ore, gold ore, silver ore, coal, and etc. The algorithm is not only simple and intuitive, but also improves the efficiency and accuracy of the prioritize division of mineral resource development.
Cloning and Bioinformatic Analysis of Stearoyl-Acyl-Carrier Protein Desaturase Gene in Cassava (Manihot esculenta Crantz)
Authors: Fan Jie , Li Rui Mei , Geng Meng Ting , Yao Yuan , Yang Cheng Long , Wang Yu Qing , Duan Rui Jun , Fu Shao Ping , Liu Jiao , Hu Xin Wen , Guo Jian Chun
Published: August 2014

Stearoyl-acyl-carrier protein desaturase is one of the key enzymes that irreversibly catalyze the biosynthesis of fatty acids, and has an influence on the proportion of saturated and unsaturated fatty acids. In this research,MeSACPDhas been cloned from cassava, with 1197 nucleotides and 398 amino acids, respectively. It has high homologous with the stearoyl-acyl-carrier protein desaturase inRicinus communis. The 3D structure ofMeSACPDshow a conserve motif related to Fe ion binding. We suppose the motif may be the active center and the substrate binding site area of stearoyl-acyl-carrier protein desaturase.
Technology Research on Rapid Excavation of Large Section Super-Long Coal Roadway
Authors: Liang Sheng Kai
Published: August 2014

The design construction length of conveyance roadway of the mine working face is nearly 5000m and the section area of driving is 18m2, belongs to large section super-long coal roadway. Through advanced mechanized supporting facilities tunneling construction and using reasonable support pattern and labor organization, it ensured the safety of workers, reduced the labor intensity, and realized the safety and rapid excavation with 440m/month. The economic and social benefit is obviously. It could provide reference meaning for other large section coal roadway rapid excavation at home and abroad.
The Research and Application of FLAC3D in Optimization of Roadway Support
Authors: Du Hai Feng
Published: August 2014

This article describes the basic process of numerical simulation, and an example of Xinyu coal mine roadway numerical simulation research. And the support scheme is proposed by the numerical simulation result.
Iron Recovery from Hematite Tailings by a Novel HGMS-Centrifuge Process
Authors: Zhang Hui Fen , Chen Lu Zheng
Published: August 2014

During the processing of iron ores, a large quantity of low-grade tailings containing abundant iron values in fine particle size range is produced. A novel HGMS-Centrifuge process is proposed to recover iron values from a low-grade hematite tailings. In this process, the tailings is effectively roughed with pulsating high pulsating high gradient magnetic separator to produce a relatively high-grade iron concentrate, then this concentrate is cleaned with a continuous centrifugal concentrator to produce a high-grade iron concentrate. The results of investigation indicate that this novel process is capable of producing an iron concentrate assaying 58.48% Fe with 21.66% recovery from the tailings assaying 28.12 % Fe. It was concluded that this novel process may be effectively used to recover iron values from low-grade hematite tailings.
Comparison of Combination of Flotation-Magnetic-Gravity Separation Process with Bluk Flotation for Recovering Fine Tin Slime
Authors: Huang Run Zhi , Yang Lin Yuan , Tang Zhong Qin
Published: August 2014

A comparative analysis of the combination of flotation-magnetic -gravity separation with bulk-floatation process for recovering fine tin slime was carried out in a mineral processing plant. Compared to the bulk floatation process, the flotation-magnetic-gravity separation process resulted in a higher recovery of tin and showed advantages of small consumption of reagents and electric power, stable production index and easy operation.
Review on the Mineral Processing-Metallurgy Combined Processes Researches on Copper Oxide Ore
Authors: Mao Ying Bo , Wen Shu Ming , Fang Jian Jun
Published: August 2014

Methods used for mineral processing-metallurgy combined processes of copper oxide ore were reviewed and the research directions of copper oxide ore were pointed out.
Quantitative Identification of Reservoir Fracture with the Variable Scale Fractal Technique in Su53 Gas Field, Ordos Basin
Authors: Wen Hua
Published: August 2014

Typical tight gas reservoirs in the Su53 Gas Field, Ordos Basin, are the demonstration region for deploying horizontal wells. In order to provide foundation for evaluating the volume fracturing adaptability of horizontal wells, through using the amplitude difference data between deep investigate double lateral resistivity (Rd) and shallow investigate double lateral resistivity (Rs), and other conventional logging data, in combination with the response characteristics of fracture in the logging curve, reservoir fracture was quantitatively identified with the variable scale fractal technique, the vertical heterogeneity of fracture distribution was analyzed, and the relationship between fractal dimension value of fracture and initial deliverability of gas well was researched. The results indicate that, this method is applied to quantitatively identify and evaluate the fracture development degree of single-well is feasible; the relationship between fractal dimension value and fracture development degree is positively relative, fractal dimension value is bigger, the fracture is more developed; there is a good corresponding relationship between fractal dimension value and deliverability of gas well, fractal dimension value decreases with a decrease of deliverability.
Residual Oil Distribution Law and Controlling Factors of Chang 6 Reservoir in Liutai Area
Authors: Zhang Feng Run , Guo Ai Hua , Cai Huai En
Published: August 2014

Because of the high heterogeneity, late water flooding and irregular well network, the distribution law of residual oil reserve in Chang 6 reservoir becomes much complicated. Combining the geology with dynamics of the reservoir, volumetric and formation coefficient methods are adapted to calculated the residual reserves, and then the distribution laws and controlling factors are analyzed. The results indicate that: there are still large amounts of residual reserve in main layer Chang 622; the residual reserve can be classified into three kinds, Class I and class II are distributed concentrative in main layer; the controlling factors include property, sedimentary facies, heterogeneity, well network controlling and geological structure and so on. Finally, according to the distribution laws and controlling factors, targeted measures are proposed. The studying results provide well foundations for improving recovery of residual oil reserves and the total recovery of the reservoir.
Water Testing Technology Research and Application in Horizontal Well
Authors: Li Hong Jun
Published: August 2014

Now, water testing in horizontal well is still a worldwide problem, has not yet been mature and reliable technology is widely used in oil fields. Liaohe oilfield test center after three years of scientific research, has made some progress, developed a set of suitable technology for water testing in Liaohe oilfield horizontal wells, and to apply this technology to the water testing in oil wells, a good test results have been achieved.
The Polymer Cement Fluid Loss Reducer in Haita Region
Authors: Zhang Xiao Hui , Ma De Cheng , Wang Ji Gang , Tong An Qi
Published: August 2014

The underground situation of Haita oil field is complicated, the chasm develop better, prone appear card and collapsed situation in drilling process. Formation dip larger and prone appear well deviation in drilling process, repeatedly corrected well deviation cause the quality of well bore worse, leading to a large segment of "pregnant", "the candied fruit" well hole. Well diameter irregular and well bore quality assurance is not easy, bring difficulty on ensure cementing project quality. Statistics substandard quality cementing wells during drilling, the average single well corrected well deviation up to 3 times. The oil well cement fluid loss reducer of our country experiencing imitation, self-study and self-improvement process. Especially since the 1990s, the research and application of domestic oil well cement fluid loss reducer rendered vitality, a series of fluid loss reducer products gradually replace foreign products.
Effects of Different Packaging Materials on Red Fragrant Pear during Postharvest Modified Atmosphere Storage
Authors: Zhu Dan Shi , Lv Jia Yu , Liang Jie Yu , Ge Yong Hong , Cao Xue Hui , Feng Xu Qiao , Li Jian Rong
Published: August 2014

The effects of different packaging materials (including CPP, LDPE, HDPE, PP6, PP12, OPP and PO) on the changing of O2 and CO2 content in Red Fragrant Pear MAP during storage at different initial air conditions were studied in this paper. Gas composition was affected by respiration rate of pear and the permeability of packaging material remarkably. The results showed that OPP, LDPE and CPP were better for maintaining the desired atmosphere composition of O2, CO2, N2 during preservation of red fragrant pear. In addition, 100% N2 as initial gas was more suitable to preserve red fragrant pear than that with air or vacuum significantly.
Study on Phase-Point Controlled Atmosphere Storage Technical Characteristics
Authors: Jia Xiao Yu , Li Xi Hong , Liu Hai Dong , Shao Chong Xiao , Li Li , Liu Xia
Published: August 2014

By measuring temperature, humidity, SO2concentration of phase point controlled atmosphere storage to study its technical characteristics. The results shows that the temperature change of phase point controlled atmosphere storage is less than cold storage, its temperature change range is ±0.1°C. Humidity remained at about 94%.The distribution of SO2concentration is uniform.
The Best Working Condition of the Food Refrigeration and Frost Time Determine
Authors: Wang Zhi Yuan , Wang Liu , Tong Zhi Wen , Wang Meng
Published: August 2014

The cold storage temperature in China is required at-18°C. At the temperature, microbial breeding is almost completely stopped, biochemical changes are greatly suppressed in the food. However, the evaporator surface will frost easily at the low temperature. Because of the high thermal resistance of frost layer, the heat transfer effect becomes worse. It also led to the decrease of the evaporation temperature, the power consumption of refrigeration unit increases and dry food consumption is huge. Therefore the experiment research of the heat exchanger in a certain air temperature, wind speed, relative humidity condition and the optimum working condition of the food refrigeration has a practical guiding significance to the food refrigeration. Experimental results show that the economic defrosting cycle is set to 2 ~ 3 hours, defrosting time is set to 25 min ~ 40 min.
Preliminary Study on Low-Carbon Urban Development and Low-Carbon Design
Authors: Li Xiao Na , Zhang Yuan
Published: August 2014

In advocating the principle of sustainable development, urban development calls for reducing the carbon dioxide emissions to promote low carbon economy. Low-carbon design is the foundation and effective method of low-carbon economy development. By analyzing the principles of low-carbon urban development, methods of low-carbon design were discussed so as to guide people's low carbon consumption and reduce carbon footprint. Low-carbon design process was proposed at last. In this way, the development of low-carbon urban could be carried out by starting from the source.
Carbon Emission and Urban Construction Land Expansion in China: Evidence from Co-Integration Tests and Impulse Response Model
Authors: Qiu Wen Wen
Published: August 2014

Using co-integration analysis, Granger causality test, and impulse response analysis in an integrated way, this paper makes empirical study of the impact on China’s carbon emission by its urban construction land expansion. The result shows that there is a long-run equilibrium relationship between carbon emission and urban construction land expansion in China, with the latter being the Granger cause of the increase in carbon emission. However, the impact process shows a lagging nature. The impact effect is not so evident in a short term, but is rather significant in a long term (five to ten years). To reduce its carbon emission, China should optimize its urban development mode and control the scale of urban development reasonably, especially focusing on the economical and intensive use of land and upgrading of industrial structure, so as to reduce energy consumption by its urban expansion, check excessive increase in carbon emission, and promote the sustainable urbanization.
On the Application and Research of Sustainability Thinking in Indoor Environment Design
Authors: Feng Xin Qun , Wang Xia
Published: August 2014

With the rapid economic development, long-term and sustainable growth of material life and indoor design, people’s non-material and spiritual need of indoor design cannot be satisfied simply from the perspective of physical function and visual or aesthetic standards. Based on the people-oriented concept as the core, this paper proposes a new sustainability thinking marked with the combination between" Human, Nature and Technology". By presenting the definition of sustainability thinking, analyzing and studying the functional design system and the natural environment design system which emphasize the integration between human and technology under the systematic thinking of indoor design, and combining with some cases, the author summarizes the application of energy-saving thinking, low-carbon thinking , and environmental protection thinking in the design of the indoor environment and in the high technology under the guidance of sustainability thinking, aiming at building a correct sustainability thinking of indoor environment design and exerting a strong, meaningful and practical influence on people to create an environmentally-friendly life
Carbon Emissions Measurement of Jiangsu Province Industrial Energy Consumption Based on LMDI Method
Authors: Xiao Sun Xi , Wu Lin
Published: August 2014

Energy consumption is the major source of industrial carbon emissions. Energy consumption carbon emission factor method and LMDI (Logarithmic Mean Divisia Index) method was used to analyze the carbon emission evolution of industrial economy energy consumption in Jiangsu Province with collected data on industrial energy consumption in 1995-2012. Results showed that Jiangsu province economic industrial carbon emissions keep increasing in 1995-2012 years. The results of carbon emission increase analysis of energy consumption structure effects, industrial energy consumption intensity effects and output scale effects in 1999-2012 showed that energy consumption intensity effect has the maximum contribution to carbon emissions in industrial carbon emissions Jiangsu Province. Therefore, the main way to control carbon emissions of industrial energy consumption in Jiangsu Province is reasonably control the growth of energy consumption.
Study on Fructan Metabolism and Enzyme Activity of Helianthus tuberosus L.
Authors: Sun Xue Mei , Wang Li Hui , Li Yi , Zhao Meng Liang , Zhong Qi Wen , Li Li
Published: August 2014

“Qingyu 2”Helianthus tuberosusL. was used to study fructan metabolism and the synthesis and degradation enzyme activity in the whole growth period ofHelianthus tuberosus ondry land and irrigated land. The results show that, SST is mainly expressed in the leaves, the main site to synthesis kestose. FFT has high level expression mainly in the tuber expansion stage and then synthesis the DP ≥ 4 fructan. The stem with small fructan biosynthesis and degradation is a temporary fructan storage site. Before and after blossom, FEH activity reaches the peak in leaves and tubers. Fructan synthesizes and accumulates mainly in the rapid growth period and tuber formation stage, and remains stable in blossom stage before transfering rapidly to tubers from leaves and stems inexpansion period. Drought stress on dry land does not affect the fructan metabolism before blossom, but prevents the FEH expression in blossom, which delays fructan transfer to the tubers and FFT expression of tubers.
Study on Mutual Adaptability of Environmental Protection Project and Women
Authors: Xia Ming Yong , Chen Shao Jun , Cheng Jun
Published: August 2014

On the basis of the development of social assessment, the author proposes gender analysis logic, and then takes the Ningbo municipal solid waste minimization and recycling project as an example, studies on the mutual adaptability of environmental protection project and women, analyzes mutual effect and gender risk between environmental project and women. Discover that the influence of the project to women has both positive and negative effects. As subjective initiative individual affected by the project, women’s attitudes and behaviors to the project will affect implementation of the project effectively in a direct or indirect way.
The Influence Assessment of the Intensive Using the Sea on Marine Resources in Caofeidian
Authors: Cui Li Tuo , Li Zhi Wei
Published: August 2014

Based on the comprehensive evaluation method, the evaluation index system, composed of port resources, tourism resources, fishery resources, space and other resources,was established to evaluate the influence of the intensive using the sea in Caofeidian area on marine resources.The evaluation standard about the influence of the intensive using the sea on marine resources was founded.The comprehensive influence of theintensive using the sea in Caofeidian area on marine resources was evaluated.The results showed that the intensive using the sea in Caofeidian has an certain effect on marine resources and the influence degree is still in the acceptable range.The sea in Caofeidian can be appropriately used for the intensive using the sea. But in comparison,the influence of the intensive using the sea in implementing process is greater than that after the completion of the intensive using the sea. There is difference in the infulence of intensive using the sea on marine resources.The infulence degree on fishery reources is the greatest and reaches unacceptable leve,follwed by the spatial resources.The influence on the port and channel resources and the tourism resources is smaller.
Study on Assessment Method of Emergency Disposal Technology Based on Threat Evaluation
Authors: Meng Xian Lin , Zhu Hong , Qu Jian Hua
Published: August 2014

s:In order to predict the harm of sudden pollution to source water,screen out appropriate emergency disposal technologies,an evaluation index system of emergency treatment technology in urban drinking water source based on threat evaluation was established by analytic hierarchy process (AHP) from the points of pollution situation,pollution position,water source scale,emergency management and alternative water source.Threat was divided into four levels, and different threat-levels corresponded with different weight of the evaluation index system of emergency disposal technologies. When pollution event occurred, emergency experts graded every index, got the threat-level according to the linear weighted method and selected corresponding set of weights of the emergency disposal technologies The method proved to be an scientific and accurate.
Progress on Organochlorine Pesticides (OCPs) in China’s Lakes
Authors: Song Yan , Zeng Hong Hu , Liang Yan Peng
Published: August 2014

Organochlorine Pesticides (OCPs) is a kind of typical Persistent Organic Pollutants (POPs) with high toxicity, semi-volatility, environmental persistence and bio-magnification. Because of its large number of application in history, the residue level of OCPs in environmental media is rather high. This paper summarizes the existing status of the residue level and distribution of OCPs in China’s lakes in recent years, which is helpful to evaluate the pollution status of the OCPs in lake and provides a basis for effective governance.
The Kinetic Model of the Uptake and Release of Pollutants by Tubificidae in Sludge Reduction System
Authors: Lou Ju Qing , Yang Dong Ye , Zheng Ping , Guo Mao Xin , Sun Pei De
Published: August 2014

Tubificidae is often used in the wastewater treatment systems to minimize the sludge production. A two-compartment kinetic model was applied to simulate the uptake and release of C, N and P-bearing pollutants by Tubificidae in a sludge reduction system. The nonlinear fitting method was used to calculate the uptake rate constantK1and the release rate constantK2for TOC, TN and TP, which were 4.983, 25.764, 10.154 and 3.671, 23.683, 9.023, respectively. The model fitted quite well with the collected data, suggesting that the model was applicable. The results showed that Tubificidae activity would increase the C, N and P concentrations in the system, and the specific release rates of C, N and P-bearing pollutants were 4.31 mg COD/gL. hoffmeisteri· d, 0.722 mg TN/gL. hoffmeisteri· d, and 0.14 mg TP/gL. hoffmeisteri· d,respectively. Ammonia nitrogen contributed up to 70.42% of the released nitrogen.
Summary of the Desulfurization Solutions of Marine Exhaust Gas
Authors: Gao Jian , Liu Guang Zhou , Liu Xue Lei , Xu Shu , Liu Xin
Published: August 2014

SOX emission control of the marine exhaust gas can be achieved by post-processing desulfurization and LNG’s usage. The two solutions are discussed by the technical and economic analysis. Four kinds of post-processing desulfurization have the differences on system composition, wastewater discharge, and applicable waters, absorbents and so on. The pay-off periods of post-processing desulfurization are ranged from 0.5 to 2.2 years, which depended on the ship type’s difference. LNG’s pay-off periods is about one year, but some hidden costs for LNG ship’s promotion are difficult to estimate.
Impact of Range Hood Exhaust Air Volume on PM2.5 Concentration in a Residential Kitchen
Authors: Cao Guo Qing , Xie Hui , Zhao Shen
Published: August 2014

According to PM2.5 pollution in the kitchen, a mathematical model is established about the effect of range hood exhaust air volume on PM2.5 pollution control based on calculus method. On the basis of some actual cooking cases, PM2.5 concentration in a kitchen is calculated for different exhaust air volume. Self-clean time is also given. The conclusion of the paper provides a theoretical basis for determining parameters of exhaust air volume of range hood.
The Impact of Oilfield Development on the Ecological Environment and its Protection Countermeasures
Authors: Yue Ting , Hu She Rong , Zhang Yu , Yu Ming Da , Zhang Xue Qing , Li Xiao Fei
Published: August 2014

Oilfield development has brought important energy to people. However, it inevitably produces a variety of pollutants at the same time, which have a great effect on the ecological environment. This article analyzed the pollution sources and the pollutant influence situation on ecological environment (atmospheric environment, water environment, soil environment, natural vegetation and animal, etc.) in every stage of oilfield development, and then put forward the environment prevention and control measures. The author thinks that we should establish comprehensive environmental protection monitoring mechanism, improve environment protection technology and effective protection measures such as environmental protection law and regulation system, and implement clearer production. Furthermore, we must advocate people to protect the ecological environment and reduce environmental pollution.
Solubilization of Radionuclide 238U and 137Cs in Contaminated Soil with Acidithiobacillus thiooxidans
Authors: He Zheng Tao , Ding Yi , Yuan Shi Bin
Published: August 2014

How to control and remediate the radionuclides-contaminated soil is attracting increasing attention. Researches on microbial solubilization of traces of238U or137Cs in contaminated soil withAcidithiobacillus thiooxidanswere conducted. The results show that238U or137Cscan be solubilized by the strain, which can produce sulfuric acid steadily in liquid medium. In the 5th and 7th day the removal rate of238U and137Cs were up to 78.71% and 81.48%, respectively. At the same time, the destroying of soil nutrients can be neglected
Flocculant Screening for the Pretreatment of Printing and Dyeing Wastewater
Authors: Lan Shan Hong , Ma Ping , Geng Shi Wen , Sun Jia Hao , Lan Hui Xia , Zhang Heng
Published: August 2014

Study on the pretreatment of printing and dyeing wastewater with PAC、Fe2(SO4)3and FeCl3was carried out. Effects of the flocculants dosage, pH on the treatment efficiency were studied. The results showed that with PAC, Fe2(SO4)3and the FeCl3dosage rising, the treatment effect first decreased and then increased and when the addition amount was 300 mg.L-1、300mg.L-1and 250 mg.L-1,the COD removal efficiency achieved 69%、78%、74% , respectively. With the rising of pH, the treatment effects of the three types of flocculants increased first and then decreased, the optimum pH of PAC and Fe2(SO4)3was 7and the best pH of FeCl3was 6. At last, the settle ability and the amount of the producing floc were studied, the results showed that the settle ability was the best and the least amount of sludge produced by FeCl3flocculation. Keywords: printing and dyeing wastewater, pretreatment, flocculants, screening.
Modeling the Influence of Wind Velocity and Water Content on Coal Dusts in Wind Tunnel
Authors: Cong Xiao Chun , Liu Qing Qing
Published: August 2014

Emission of coal dusts can cause serious air pollution in coal-pile storage yard, which poses a threat to human health. Therefore, the quantitative research on particulate emissions is the premise for dealing with atmospheric pollution. In this paper, a series of experiments are firstly carried out in wind tunnel to study the impact of the wind velocity and water content on coal dusts for the mixing pile. Moreover, particle entrainment is investigated by measuring the velocity required to pick up particles from rest, also known as threshold velocity. Then a number of experimental data are obtained and a fitting formula is derived with the aid of Matlab. Finally, the results are compared with those published previously, and explanations about the differences are given.
Discussion on Air Pollution and its Control Measures
Authors: Huang Le Hui , Gui Bin
Published: August 2014

In recent years, China's air pollution control achieved great results, but for various reasons,the situation faced by the atmospheric environment in China is still very grim. Total emissions of air pollutants are high. It can be said that air pollution is still serious, it is still the major environmental problems we solved.