bluuebunny/crossref_metadata_2025 huggingface dataset:
Interaction between Upwelling and Internal Tide in the East Qiongzhou Strait Areas
Authors: Bai Peng , Li Pei Liang , Gu Yan Zhen , Wu Ke Jian
Published: March 2015

An upwelling event that occurred off the east Hainan Island coast in summer 2010 is captured by processing the Moderate Resolution Imaging Spectroradiometer (MODIS) sea surface temperature (SST) data. High resolution Regional Ocean Model System (ROMS) is employed to study this upwelling event, and is proved to provide good reproduction of this upwelling event by comparing ROMS SST with MODIS SST. It is detected that internal tide generated and interacted with the upwelling in the east Qiongzhou Strait areas. The upwelling and the internal tide modulated each other: the uplift of the isopycnal due to the fluctuation of the internal tide enhanced the upwelling; in another aspect, the upwelling changed the background stratification which is sufficient to control the amount of barotropic-to-baroclinic energy conversion and the preferred direction of baroclinic energy flux [21].
Study on the Effect of LID-Type Road Greenbelt to Mitigate Urban Water-Logging
Authors: Zhu Mu Lan , Chen Yi Bin , Liao Jie , Huang Xiao Ming
Published: March 2015

It is important to mitigate urban water-logging because it has become a kind of urban disease that often occurs in many cities in China. This paper proposes a new approach to control urban water-logging by building the LID-type road greenbelt, a sunken greenbelt along city roads. Three field grasslands were selected to test their infiltration capacities. The possible reduction in runoff volume was calculated for the scenario when the proposed LID-type road greenbelt is applied to all of roads in Xiamen island. The study results indicate that the mean value of steady infiltration capacity of these test grasslands is 2.61 mm/min. The calculated reduction in runoff volume is about 8.86 million m3 for the storm of 15th-16th May, 2013 that caused a serious water-logging problem in Xiamen island. The study result proves that the LID-type road greenbelt may have a great potential to mitigate urban water-logging.
Time and Space Evolution of Shallow Saline Groudwater Dynamic in Inland Area of Jiyang County，Shandong Province, China
Authors: Zhang Feng Juan , Xing Li Ting , Peng Tong Qiang , Zhou Juan , Yang Yi
Published: March 2015

Inland plain shallow saline water has great exploitation potentiality. Based on field water testing, water level monitoring, pumping test, as well as indoor leaching experiment, applying mathematical statistics, Pipers trilinear nomograph and PHREEQC chemistry simulation methods, saline water area of the town of Sungeng Jiyang was studied. The results showed as follows: (1) Inland shallow groundwater presents “weather-evaporative” dynamic type; (2)The shallow saline water and middle-deep groundwater belonging to different flow system; (3) Because of the creeping flow and aqueous medium riched in clay, inland shallow groundwater mineralized significantly. In saline water area inland plain, the unique features of groundwater circulation result in brackish water dynamic relative stability.
Water Resources Carrying Capacity Analysis of Huangshui River during the Period of the Twelfth Five-Year Plan
Authors: Jing Ming Xia
Published: March 2015

This paper predicted HuangShui River carrying capacity level of environmental resources at the end of the "twelfth five-year" period and even longer, based on the economic and social development in the base year 2011 data, to provide reference for the development of various government related department reference.
Hydrodynamic Sediment Environment and Port Development Research in the Sea Area for Matakong Island, Guinea
Authors: Zuo Shu Hua , Zhao Hong Bo , Cai Yin
Published: March 2015

Based on the observed data, hydrodynamic sediment environment and port development in the Matakong sea area are researched. The results show: (1) the local tide belongs to regular semi-diurnal tide. The mean tide range is 2.42m. The mean current velocity is from 0.11m/s to 0.39m/s, and the max vertical mean current speed is from 0.18m/s to 0.60m/s. The prevailing direction is mainly from W to SW, the mean wave height is less than 1.0m, the maximum wave height is 1.5m around, and the mean period is from 4.6s to 4.7s. (2) Medium grain sizes of seabed sediment samples are from 0.0038mm to 3.0597mm in the dry season and from 0.0075mm to 1.1044mm in the rainy season. (3) Average suspended sediment concentration is 0.02-0.09 kg/m3, and the max sediment concentration presents 0.3kg/m3 approximately. (4) Most parts of the sea area are equilibrium in sixty years, and the erosion and deposited ranges are 3.0cm/a about. (5) After the ore wharf development, deposited sediment is mainly mud. The annual mean deposited strength of the channel is from 0.14m/a to 0.84m/a, and the annual mean deposited strength in the harbor basin is 0.42m/a.
Effect of 3 Kinds of Organic Fertilizers on the Concentrations of Dissolved Organic Carbon in Clay Soil under Flooded Conditions
Authors: Deng Xiao , Wu Chun Yuan , Li Yi , Liu Jing Kun , Li Qin Fen
Published: March 2015

Using pot experiment to study the effect of three organic fertilizers of chicken manure compost (CM), activated sludge (AS) and cassava residue compost (CR) on the concentrations of dissolved organic carbon (DOC) in clay soil under flooded conditions. The results showed that the regular patterns of the concentrations of DOC are basically the same in clay soils on applying three kinds of organic fertilizers and no applying fertilizers under flooded conditions. They were all showed as a “down-up-down” trend. The three kinds of organic fertilizers could effectively increase the concentrations of DOC in clay soils. And the concentrations of DOC gradually increased with increasing of the added proportion of organic fertilizers in clay soils, which respectively increased 1.34% ~ 52.64%, 4.58% ~ 149.98% and 2.64% ~ 72.45% in the treatments on 1%~3% addition amount of CM, AS and CR. It indicated that the improving effect of three kinds of organic fertilizers on the concentrations of DOC showed as AS>CR>CM in clay soils under flooded conditions.
Effect of Biochar on NH3 Volatilization and N2O Emission in Brown Soil
Authors: Cheng Xiao Yi , Lan Yu , Liu Zun Qi , Liu Xiao Lin , Yang Xu , Meng Jun , Chen Wen Fu
Published: March 2015

In this study, we investigated the effect of biochar on NH3volatilization and N2O emission in brown soil by using enclosed acid absorbing method and static chamber-gas chromatograph method. The results showed that without fertilizing, there was no significant effect of biochar effect on NH3volatilization and N2O emissions but if biochar was combined with urea, a dramatic mitigation of which could be found. Biochar application was supposed to regulate urea-N transformation more easily than soil nitrogen. Under the conditions of this experiment, both NB20 (20 t·hm-2of biochar and conventional nitrogen fertilizer applied) and NB40 (40 t·hm-2of biochar and conventional nitrogen fertilizer applied) treatments reduced NH3volatilization and N2O emissions significantly. By contrast of NB0 (single urea), the accumulated NH3volatilization and N2O emissions of NB20 and NB40 decreased by 15.6% and 24.4% and by 21.76% and 19.56% respectively. Under conventional fertilization conditions (NB0), 10.35% of nitrogen in fertilizer was lost in the form of NH3and N2O, and compared with NB0, NB20 and NB40 reduced nitrogen gaseous loss from fertilizer by 2.76% and 4.12% respectively.
Experimental Study of the Application of Sodium Silicate in the Windbreak and Sand Fixation Engineering
Authors: Sun Jing , Liu Hong Bo , Zhang Li Qun , Xu Yong Feng
Published: March 2015

With the accelerated development of land desertification, sudden wind sand disaster, strong dust storm occurrence frequency more and more high.In the desert area where the alkali content in soil is low and there is existence of quicksand, the sand brick was prepared by using sodium silicate as chemical sand fixation adhesive materials and sodium fluosilicate as hardening agent, in order to improve the surface properties of desert land, control the spread of deserts and improve the environment of desert. In this paper, the suitable dosage of sodium fluosilicate and sodium silicate were studied,which have an important effect on compressive strength, flexural strength, block antifreeze and water absorption properties of the mortar test block.
Law of the Surface Sediment Transport and Maintenance Methods of Beihai Silver Beach
Authors: Liu Xin , Huang Yong Jun , Gan Fu Wan
Published: March 2015

Due to the disorder development of Beihai Silver Beach and the effects of the climate,there has been a serious phenomenon of beach erosion at Beihai Silver Beach,so to put forward effective and feasible maintenance methods of Silver Beach has the great significance.Through the sediment numerical simulation of the waters near the Silver Beach and analysis of the results and to conclude the law of sediment transport both in typhoon and normal wind and the sediment recovery mechanism of the Silver Beach.After a typhoon,the nearshore is scoured and the far offshore is deposited.The average scour depth is around 4cm and the average deposited height is around 2cm.The normal wind period is the sediment recovery period.After a year of normal wind,the nearshore and the far offshore is deposited,between them is a scouring area.The average scour depth is around 3cm and the average deposited height at the nearshore is around 4cm.The sediment recovery mechanism is that ,due to the dynamic action of the water in the normal wind period,it transports the deposition of sediment at the far offshore to the nearshore so as to make it recovered and gradually deposited.Based on the above regularity and mechanism,measures can be taken like that,to fill a sediment barrier parallel to the shoreline,which can make the water carry more sediment to the nearshore so as to speed up the recovery at Silver Beach.The sediment can be got from Baihutou and Yingpan Town.
Water Mass Flow and Air Relative Humidity on Performance of Air - Source Heat Pump Water Heater
Authors: Wu Zhi Jiang , Xu Yan Sheng
Published: March 2015

The water mass flow and air relative humidity on the performance of air-source heat pump water heater was discussed in this paper. The results show that the energy efficiency of heat pump water heater is improved by correct the water mass flow and discharge pressure can be reduced, the value of the condenser temperature difference between the import and export of water also can be reduced. Increasing the air relative humidity, the more condensated water on evaporator surface effective, the greater the wetting area. In addition, the heat transfer of latent heat can be increased by the growth of air side and refrigerant side heat transfer coefficient.
Variability of Grain Size of Surface Sand on Nebkhas at the Southern Fringe of the Taklimakan Desert, China
Authors: Xue Jie , Lei Jia Qiang , Li Sheng Yu , Wang Cui , Zhou Jie , Mao Dong Lei
Published: March 2015

Nebkha plays a major role in the ecological and environmental stabilization by accumulating wind-blown sediments around shrubs. Grain-size characteristics of different positions on nebkha reflect the sorting effect of aeolian dynamics. Based on the collected sand grains of different positions on four types of nebkhas at the southern fringe of Taklimakan Desert, China, this paper provided detailed insight into variability of the grain size of surface sand on nebkhas. The results showed that: a) Grain-size distributions on shield-shapedKarelinia caspica Nebkhasunder natural condition had the larger spatial variability in comparison with the others. b) Grain size on nebkhas regularly showed the spatial variation. Grain size was increasingly larger along the windward slope upward, and then became finer along the leeward slope downward. c) The grain-size sortings of different positions on shield-shapedAlhagi sparsifolia Nebkhasunder new reclaimed land were the best.
Design and Implementation of Hazard Waste Supervision System Based on Open Source WebGIS
Authors: Zhang Yuan , Liang Hong , Qian Ying , Wu Cheng Lian
Published: March 2015

Hazard waste has become a big problem to environment and human society. So its supervision and management is becoming a research hotspot in environmental science. This paper adopts open source software PostGIS, GeoServer and OpenLayers to build a hazard waste supervision WebGIS, which has realized online display of hazard waste sources, visualized analysis of hazard waste sources and hazard waste transportation route tracking based on GPS data.
The Network Analysis in Rural Tourism Land Use Based on GIS
Authors: Tang Shu , Tang Hao
Published: March 2015

Along with the development of tourism, regional choice of traveling activities turns out to be diversified. Rural tourism has become more and more popular among the tourist mainly from urban area and affect the land use in rural area obviously. Due to the coarse and incomplete data limitations, traditional GIS technique such as RS analysis cannot play a very good role in rural land use research. Based on the explanation as series of interrelationships between spatial entities with the characteristics of social relations, network analysis is considered as a useful method to describe the change and structure of land use affected by tourism in rural area.
Analysis of Close Distance Coal Seam’s Mining Rational Staggered Distance
Authors: Song Bao Sheng , Jing Dan Yang , Zhou Yu , Zhou Dian Qi
Published: March 2015

As 2# and 3# coal in Baoxin coal mine are close distance coal seams, combined mining is adopted to ensure the production, and reasonable staggered distance needs to be determined between the upper and lower adjacent workfaces. Calculated on the influence of strata movement, there is a empirical formula for the coal’s alternate distance.It is necessary to analyze the factors in the formula
Application of Mean Square Deviation Method to the Target Selection of Acid Fracturing for Fissure-Cavern Carbonate Reservoirs
Authors: Wu Ya Hong , Wang Li , Fang Hao Qing , Tian Xi Shan , Mi Qiang Bo , Li Chun Yue , Li Bo Yuan
Published: March 2015

The Ordovician fissure-cavern carbonate reservoirs of Tarim Basin have relatively large production thickness, long completion intervals and serious heterogeneity problems, former studies about physical parameters for fractured intervals of acid fracturing cannot be well presented through mean algorithm method. This paper uses mean square deviation method to acquire the values of the main influencing factors of acid fracturing, then optimizes the physical characteristics of the fractured intervals. The BP neural network simulation has been adopted to get the optimal BP neural network structure model. In Tarim, this study has simulated 20 wells before acid fracturing using the decision software which compiled by the optimum neural network construction. Comparative analysis has been made through application examples, the coincident rate of mean algorithm is 75%, compared with the 90% of mean square deviation method. Therefore, during the target selection for acid fracturing of heterogeneous carbonate reservoirs with long open hole intervals, it’s significant to use mean square deviation method to optimize physical parameters of reservoirs.
An Improved Tunable Piezoelectric Energy Harvesting Structure Based on d33 Mode Coupling
Authors: Zhao Yang , Wang Kun Peng , Li Ying Tai , Guan Ming Jie
Published: March 2015

This research proposes an improved tunable piezoelectric harvester structure which is constructed by a cantilever base beam and piezoelectric elements working in d33 mode. Our previous work on tunable piezoelectric harvester structure showed a frequency variation ratio of 3.17% with piezoelectric elements working in d31mode coupling. In this work, by changing the working mode of the piezoelectric elements from d31 to d33 mode, the frequency variation ratio was shown to be much higher. Theoretical analysis of the improved structure was investigated and verified with simulations. The results showed that the d33 mode coupling surpasses the d31 mode coupling with a frequency variation ratio of 29.74%.
Characteristics and its Environment Implications of Carbon and Oxygen Isotopic of Ordovician Carbonate Rock in Yubei Area
Authors: Zhang Qian , Huang Wen Hui , Zhang Ya Mei
Published: March 2015

Based on a large number of carbon and oxygen stable isotope data, researched environment characteristics of Ordovician carbonate rocks in Yubei area, Tarim Basin. According to carbon, oxygen stable isotopes (&13C, &18O) data, combining the diagenetic environment characteristics studied all kinds of geochemical characteristics of rocks in Yubei area. The research results show that: Paleosalinity feature of Ordovician carbonate rocks in this area reflected the carbonate rocks is formed in the stability of the marine environment and basically kept the composition of carbon and oxygen isotopic of the original environment. the paleo temperature characteristics indicate that the diagenetic burial depth was increased first and then decreased, the sea level characteristics indicate that the sedimentary strata by Yingshan period to Lianglitage period corresponds with a rise in sea level.
Comparsion Study on Two Methods of Water Inflow Prediction of Coal Mining
Authors: Chen Shi Lei , Xu Ke , Yu Shu Bin , Li Bo , Cao Bin , Shen Jian Jun
Published: March 2015

Because of the complex geologic space body and the underground seepage conditions, it is difficult to predict groundwater water inflow in prevention and treatment control work of coal mine. To predict the groundwater flow of the coal seam under the roof sandstone aquifer in Nanshan coal, the big water well method and three-dimensional numerical model were used at the same time. The quantity of predicted normal water inflow was 553.5 m3/h by using numerical model and the big-well method is about 591.6 m3/h. The result of big-well methods was relatively close to the result of numerical simulation method, which proved the rationality of the two methods in parameters selection and model building, and greatly improved the reliability and accuracy of prediction results. Compared with large-well method, by establishing the complex 3D geological structure of underground water and fitting the parameters based on the actual data of hydrology, numerical method could simulate the process of groundwater seepage and dewatering engineering, overcome the parameter uncertainty of large-well method, improve the predictive accuracy of the mine water inflow, and has important application value.
Discussion of Sandstone Outburst Mechanism by Rock Drivage in Deep Mine Coal-Bearing Strata
Authors: Cheng Guo Jian
Published: March 2015

When tunneling deep sandstone roadway of-350m level in Yongrong mining area, it appears frequent occurrence of rock burst and gas dynamic phenomenon. Through discussing tectonic stress field, tunneling stress field, self-weight stress field and physico-mechanical properties of middle-fine sandstone, this paper draws sandstone outburst mechanism with rock drivage in mine coal-bearing.
Equilibrium Temperature Calculation of the Sulfur Isotope in Dongzhongla Pb-Zn Deposit in Tibet
Authors: Fei Guang Chun , Yu Yi Fan , Hua Ke Qiang
Published: March 2015

The Dongzhongla Pb-Zn deposit, a newly-discovered medium-sized deposit, is located in the north margin of the eastern Gangdese, central Lhasa block. Based on the analysis of the ore-forming geological conditions in this deposit, sulfur isotope of this deposit were analyzed, and S isotopic equilibrium temperature of mineral pairs (sphalerite and galena) were calculated. This study has shown that the sulfur isotopic equilibrium temperature of sphalerite and galena in Dongzhongla Pb-Zn deposit ranged from 185℃ to 296℃. It indicated that the equilibrium temperature decreased gradually from the skarn stage to sulfide stage. The equilibrium temperature can be used as the reference of metallogenic temperature for Dongzhongla Pb-Zn deposit. DongzhongLa deposit is the typical type of skarn Lead-zinc deposit. East of the Dongzhongla mining area is the priority exploration area.
Research on the Height of Water-Flowing Fractured Zone under the Weak Roof Strata and Fully Mechanized Caving Condition
Authors: Zhang Yan
Published: March 2015

The first working face production has suspend because of the great roof water inrush in Mindongyi coal mine, which has weak roof strata and mining use the fully mechanized caving method. In order to detect the height of water-flowing fractured zone, loses of drilling fluid observation method has carried on the flied test, the results showed that while the full-mechanized caving mining thickness is 7.7 m, the height of water-flowing fractured zone is 79.78 m, and the ratio of height to thickness is 10.36, meanwhile, the numerical simulation and similar material simulation have proved the test results are correct. The study enriched the domestic research fruits of the height of water flowing fractured zone, and provided technical references for Mindongyi coal mine mining.
Feasibility Study of Isolated PV-Wind Hybrid System in Egypt
Authors: Dawoud Samir Mohammed , Lin Xiang Ning , Sun Jin Wen , Okba Merfat Ibrahim , Khalid Muhammad Shoaib , Waqar Asad
Published: March 2015

This paper proposes the possibility of using the diesel generator with renewable energy sources (RES) and compares the cost of energy of isolated pv-wind-diesel-battery-converter hybrid system with a stand-alone diesel generator for a rural region in Egypt. The isolated system is also evaluated to find out the quantity of air pollution. The system has to supply a load with an average value of 48 kW and a peak value of 71 kW. HOMER software is used to carry out the cost of energy (COE), net present cost (NPC) and environmental emissions (Kg/yr) calculations of optimization model. The simulation results show that the proposed hybrid system is very economical and environment friendly. The COE for the isolated hybrid power system is found to be 0.139 $/kWh which is more than half of the stand alone diesel generator system.
Study of Reasonable Width of Section Coal-Pillar in Contiguous Seams
Authors: Hou Yun Bing , Sun Jun Dong , Deng Peng Hai , Kang Yuan Yuan
Published: March 2015

Considering the serious destruction of S2 section tailgate of Liujia mine 6-7coal seam, the theoretical calculation, numerical simulation and other methods were comprehensively applied to the optimization study on the coal pillar width of very close distance coal seam. Study have shown that the lower roadway must be decorated out of the support pressure range of the upper left pillar. On basis of the theoretical calculation, the paper included the reasonable width of coal pillar is 7-9m.When the width of pillar is 8m, the stability of S2 section tailgate is good. Comprehensive consideration to determine the coal pillar width is 5 meters.
Study on Depositional Model of XinMiaoxi-Xinbei Region Fuyu Oil Layer in the Northern Fuxin Uplift of Songliao Basin
Authors: Li Yue , Ma Shi Zhong , Wang Qi
Published: March 2015

XinMiaoxi-Xinbei region fuyu reservoir of lower cretaceous quantou forth group sedimentary period develop large shallow-water delta sedimentary, which based on core data and logging information of 44 wells through the analysis of single well facies and logging facies analysis and the research of sedimentary microfacies. This area incude two kinds of subfacies,delta distributary plain,delta front.15 kinds of microfacies such as distributary channel,underwater distributary channel natural levee. Put forward the "source of phase controlled sand", "channel control reservoir" thought, predicted the main development zone of Fuyu reservoir of XinMiaoxi-Xinbei.
Study on Flotation Separation of Muscovite and Kaolinite
Authors: Chen Chao , Song Yong Sheng , Li Wen Juan , Qu Wei , Cai Liu Lu , Chen Yong
Published: March 2015

The influence of dodecylamine acetate (DDA) and myristyl trimethyl ammonium chloride (1431) on the flotation behavior of muscovite and kaolinite were studied in this paper. The condition which can efficiently separate the muscovite and kaolinite was found out: 5×10-5mol·L-1~1×10-4mol·L-11431 as collector and pH=5.The feasibility of flotation separation in this condition was validated by artificial mixed minerals separation test. The results of zeta potential measurement, infrared spectrum analysis and adsorption quantity test show that 1431 was adsorbed on the surface on muscovite and kaolinite by static electricity adsorption. The difference of adsorption quantity was consistent with results of the single mineral flotation test.
The Experimental Study and Mechanism Analysis on Flotation Separation of Tetradymite and Pyrite
Authors: Feng Hai Liang , Che Xiao Kui , Zheng Qi , Ma Li Cheng
Published: March 2015

The experimental results of flotation of pure tetradymite and pyrite show that HL-1 is an efficient collector for tetradymite flotation. Comparing to the butyl xanthate, HL-1 has stronger collector ability and higher selectivity. It solves the common problem of the separation of tetradymite and pyrite. The difference of adsorption quantity is consistent with results of the single mineral flotation test. Through the measurements of adsorption, zeta-potential, and FTIR spectral analysis, the flotation mechanism of tetradymite with HL-1 has been discussed. It is concluded that the adsorption of HL-1 on tetradymite surface is chemical adsorption through the dithiocarbamate group of the collector chelating the Bi (III) of tetradymite to form metal complex.
Types of Coal-Bearing Basin and Tectonic Unit in the Northwest Coal Hosting Area
Authors: Chen Li Min , Xu Hao , Li You Fei
Published: March 2015

Coal is typical of sedimentary deposits, Occurrence in a coal basin. The original nearly horizontal continuous coal seam was divided into different size; different depth containing coal segment by late tectonic movement, but its scope is not affected by today's "basin" restrictions. With the concept of coal occurrence tectonic unit to reflect the current Coal Occurrence Characteristics and build a prototype coal basin types that prototype into a coal basin tectonic movement after the formation of today's coal occurrence tectonic unit. In Northwest coal hosting area, the main coal bearing strata include Carboniferous-Permian, Upper Triassic, Lower-Middle Jurassic and Lower Cretaceous, and its distribution is regular; the center and strength of coal accumulation were variation in different coal-forming period; the types of basin are multiple, including Passive Margins, Peripheral Foreland, Intracontinental Rift, Intermontane, Strike-slip pull-apart, Strike-slip pull-apart, Inter-montane; moreover, one belt and two rings constitute the tectonic framework of Northwest coal hosting area.
Design and Hydrodynamic Performance Testing of One-Base Multi-Buoy Floating Sharp Eagle Wave Energy Converter
Authors: Wang Zhen Peng , You Ya Ge , Zhang Ya Qun , Sheng Song Wei , Lin Hong Jun
Published: March 2015

Research on wave energy extraction has been conducted in many countries to meet the growing demand for clean energy. To find an efficient and economic way to convert wave energy, an one-base multi-buoy offshore floating Sharp Eagle wave energy converter is designed, consisting of four Eagle head absorbing buoys, one semi-submersible barge, one energy conversion system, buoyancy tanks, underwater appendages and other components. The working principle of the device is described in this paper. To test the hydrodynamic performance of device and make an initial evaluation for the design, a model experiment of 1/13.78th scale was carried out. The influence of wave period, wave height, pressure in hydrocylinders and wave direction is tested. All the efficiencies in different conditions are compared with each other, while the high efficiency and stability of device are verified.
Drying Temperature Affect Secondary Structure of Soybean Protein-Isolate/Carboxymethyl Cellulose/Stearic Acid Composite Films
Authors: Zhang Chao , Guo Xiao Fei , Ma Yue , Zhao Xiao Yan
Published: March 2015

The effect of the drying temperature on the secondary structure of the soybean protein-isolate/carboxymethyl cellulose/stearic acid composite films was evaluated. The Fourier transform-infrared spectra showed that the stearic acid lose some characteristic absorptions. Hence, the stearic acid was well integrated with the other ingredients. The absorption band (1600~1700 cm-1) of the composite film was deconvoluted into 9 peaks for the calculation of their secondary structure. The β-sheet content of the composite films dried at 90 oC was significant higher than that of the control. Hence, the composite films dried at 90 oC was more stable than the control.
Effect of Drying Temperature on Performance of Soybean Protein-Isolate/Carboxymethyl Cellulose/Stearic Acid Composite Films
Authors: Zhang Chao , Guo Xiao Fei , Ma Yue , Zhao Xiao Yan
Published: March 2015

Drying is important for the matrix formation of composite films. A low drying temperature guarantees the compact matrix, while a higher temperature strengthens the crosslinking of ingredients. A balance point of the compact matrix and higher crosslinking degree was the key to enhance the performance of a composite film. The temperature of 30, 60, 90, and 120 oC was used to dry the soybean protein-isolate/carboxymethyl cellulose/stearic acid composite films. When being dried at 90 oC, the tensile strength of the composite films was 2.63 times higher than that of the control, and the water vapor permeability of the composite films was 77.6 % of that of the control. Hence the temperature of 90 oC was the balance point of the composite films.
Free Radical Scavenging Properties and Anti-Fatigue Activities of Angelica sinensis Polysaccharides
Authors: Zhang Lan
Published: March 2015

In this study, radical scavenging properties and anti-fatigue activities ofAngelica sinensispolysaccharides (ASP) were evaluated in vitro and in vivo, respectively. Forced swimming test of mice were carried out after 30 days of ASP administration (60, 120, 240 mg/kg·d), and the blood glucose, blood lactate, hemoglobin, liver glycogen and muscle glycogen were determined. The in vitro study showed that ASP had antioxidant activities, which exhibited scavenging effects on 2,2-Diphenyl-1-picrylhydrazyl (DPPH), hydroxyl and superoxide anions radicals. The in vitro study showed that ASP had anti-fatigue activities, which could extend the exhaustive swimming time, increase levels of blood glucose, hemoglobin, liver glycogen and muscle glycogen activities, and decrease blood lactate levels of mice.
Stearic Acid State in Soybean Protein-Isolate/Carboxymethyl Cellulose Composite Films
Authors: Zhang Chao , Guo Xiao Fei , Ma Yue , Zhao Xiao Yan
Published: March 2015

The thermalgravimetric and differential scanning calorimetry analysis were used to evaluated the state of stearic acid in the soybean protein-isolate/carboxymethyl cellulose composite films. The stearic acid lose its weight rapidly in 210~280 oC, while no significant weight loss presented among 210~280 oC in the profiles of the control and the composite films dried at 90 oC. Hence, the stearic acid was well interacted with the other ingredients. Moreover, the stearic acid was distributed as the free state and bound state in the composite films. The free stearic acid ratio of the composite films dried at 90 oC was the lowest among the tested films. The temperature of 90 oC effectively enhanced the interaction of the SA with the other ingredients.
The Effect of Drying Temperatures on the Quality of Dried Mopan Persimmon
Authors: Yang Hui Yi , Gu Shu Qin , Lu Da Xin , Zhao Yu , Wu Cui Rong
Published: March 2015

The effect of drying temperatures on the quality of dried Mopan persimmon was studied in this paper. The drying temperatures were selected at 50℃, 55℃and 60℃ respectively. The moisture content, soluble tannin content, total sugar content and total acid content were determined for evaluating the quality of dried samples. The result showed that the drying temperature at 55℃ was the optimal temperature for drying Mopan persimmons. Under the condition, the drying process took for 92 hrs, the final moisture content was 33.71%, the soluble tannin content was 3.02%, the total sugar content and total acid content were 4.83% and 0.24% respectively.
The Simulation Study about the Impact of Groundwater Source Pump on Oil Station
Authors: Han Yan Cheng , Gu Hong Ying , Peng Tong Qiang
Published: March 2015

Groundwater source pumps are popular recently in worldwide. More and more pumps have been built in city. It is well known that the heat recharged to ground aquifer from refrigeration and air-conditioning in summer will migrate along with groundwater flow. So it is worthy to study the problem such as whether it impact on the safety of oil station. This paper presents a model which use simulation the heat of groundwater pump migrate process to study the impact on oil station downstream. Through simulation the heat field diffusion procedure and temperature change are obtained. Results show that the recharged heat issued from summer groundwater source pump will spread for a long distance to oil-station with downstream flow, the temperature around oil-station rise significant. The heat may influence the safety of storage tank and oil station.
Construction and Application of Energy Efficiency Index System in Cigarette Enterprises
Authors: Tian Zhen Wei , Wang Jian Jun , Qing Shan
Published: March 2015

In order to guide and standardize energy efficiency benchmarking in cigarette enterprises, promote energy-saving emission reduction work, this paper researches on how to structure the energy efficiency index system reasonably and scientifically. The index system is established from the enterprise, process, equipment aspect, which includes all links, such as conversion, purchase storage, delivery distribution, terminal energy consumption. The energy efficiency benchmarking can be implemented according to the energy efficiency index system, and the energy saving potential can be found out by discovering the problem of energy utilization in each link and each energy level. The application practice shows that the energy-saving rate can reach over 18%, and continue to promote energy-saving emission reduction of cigarette enterprises through carrying out the energy-saving reform on the basis of reasonable application of the energy efficiency index system.
The Effect and Strategy of Global Warming
Authors: Huang Le Hui , Li Miao Miao
Published: March 2015

Global warming is one of the biggest environment challenges in front of human today. The earth’s atmosphere and clouds have the function of insulation, making the earth maintain a certain temperature in the night. The earth is in a serious greenhouse effect due to increasing pollution. The paper explains how to deal with and curb global warming.
Electrochemical Performance of SiO/C Composites as Anode Material for Li-Ion Batteries
Authors: Wang Jing , Zhou Mei Juan , Wu Feng , Chen Shi
Published: March 2015

Dopamine was used as the carbon precursor to prepare SiO/C composite. Dopamine achieved self-polymerization and covered on the surface of the SiO particles in Tris-buffer, and the SiO/C composites were gained after heat-treating in the tube furnace under Argon. X-ray diffraction ( XRD ) , scanning electron microscope ( SEM ) were used to determine the phases obtained and to observe the morphologies of the composite. The galvanostatic discharge/charge test was carried out to characterize the electrochemical properties of the composite. When the sample of the mixed SiO and dopamine at a weight ratio of 1 : 3, the composite showed the best cycle ability with the discharge capacity of 1362 mAh g−1 in the first cycle, and the initial coulombic efficiency is 55.6%, after 50 cycles, the discharge capacity is 442 mAh g−1. The improved stability of the composite is attributed to carbon-coating forming during heat-treatment process.
Experimental Study on the Influence of Gasoline Additives on Emission and Deposits of Light-Duty Vehicle
Authors: Zhu Ren Cheng , Bao Xiao Feng , Yue Xin , Jia Ming
Published: March 2015

Qualified gasoline additive could improve the vehicle emission, fuel economy and deposits in engine. However, some people consider that additive plays a little role in the gasoline, for the quality of additives is still quite uneven on the market. This paper researched the influence of additives on complete-vehicle emission by adding 10 different market additives into gasoline, respectivly. Then one qualified additive was chosen and blended into base oil to do road running test with driving 1.2 × 104 km on a light-duty vehicle. The results show that vehicle emissions could decreased 15% averagely and deposits in engine can be cleaned obviously with qualified additive.
Numerical Simulation and Experimental Study on Tar Decomposition of Low-Pressure Ejection Type Burner
Authors: Qing De Fan , Zhu Mao Kui , Luo Yang Cheng , Zhang Ya Long , Chen Ai Rui , Yang Lin
Published: March 2015

The tar decomposition of low-pressure ejection type burner was researched. The burner used software to simulate and analyse impact of the nozzle diameter d, the gas flow rate V and the distance of the nozzle to the wall L on tar cracking. The orthogonal test were used for design parameters d, V and L, the optimization values of these three parameters were carried out, and experimental method was used for test the numerical simulation results. Numerical simulation and experimental results showed that the greatest impact on tar cracking is the nozzle diameter d, the minor effect is the distance of the nozzle to the wall L and the weakest effect is the gas flow rate V, and when the nozzle diameter d=4 mm, the distance L=18 mm and the gas flow rate V=0.10 m3/h, the tar cracking is the most efficiency.
Study on the Surface Fractures of Nanoparticle Silicon Anode for Lithium-Ion Batteries
Authors: Ren Pan Li , Ma Xu , Kong Ling Long
Published: March 2015

In this paper the fractures appeared in the surface of nanoparticle silicon anode for lithium-ion batteries was explored. The changes of nanoparticle silicon anode before and after cycling were charactered using SEM, XRD,Cyclic voltammograms (CV) and electrochemical impedance spectroscopy (EIS). The result indicates that the electrode cracking occured in the cycling process , the CV, EIS and discharge specific capacity curves proved the fractures could lead to the degradation of the electrochemical performance.
Surfactant Effect of Promoting Research on Hydrate Formation
Authors: Wang Lei , Wang Shu Li , Kang Tian Tian
Published: March 2015

Gas hydrates are a major concern in oil and gas industry, Gas hydrates form in small amounts of water, gas, and the appropriate pressure and temperature conditions. Gas hydrate storage and transportation technology starts a new way for energy storage and transportation industry. The most critically technical problem is how to improve the hydrate formation rate, storage capacity and form continuously. The influences of surfactants on induction time in three types of solution with equal concentration were studied by means of visual hydrate experimental equipment, and generalized induction time was measured by direct observation method. Specific effects of different surfactants on hydrate formation were summarized, as well as the hydrate formation mechanism of surfactants . The lack of research and the research direction of the future were concluded . The further study of surfactant mechanism and build kinetics model containing surfactant have important theoretical value . The result shows that the gas molecules saturated due to the solubilization of surfactant, which promotes the progress of mass transfer in the hydrates. And driving force is provided for the complexation of host molecules and guest molecules during the formation progress of gas hydrates.
Analysis on Corona Discharge Characteristics of the Overhead Conductor
Authors: Zhao Xin Ze , Yang Zhen Xing , Zhao Mei Yun , Wang Lei , Fu Zhi Cheng
Published: March 2015

LGJ150/25 steel core aluminum stranded wires were selected as the test wires, and the aeolian vibrations which work in different cycle times of wire that is under the conditions of dry and acidic corrosion were simulated by the self-made test bed. The electronic number of corona discharge of each pre-set conductor was measured, when applying AC high voltage on the wearing wires step by step,so that the corona inception voltages of the conductors could be confirmed. And the effect of the vibration cycle times and environmental conditions on the corona discharge was researched. Taking the sum of all aluminium stands wear area of a pre-set wire as the fretting wearing capacity, the relationship between the wire wearing capacity and the corona discharge was studied. The results indicate that the corona inception voltages of the conductors decrease with the increase of the cycle times and the wires wear capacity. In general, the wear capacity of the acidic corrosion conductors is larger, and its corona inception voltage is lower. Therefore the decrease of the conductor fretting wear can effectively reduce the corona loss of transmission lines and other hazards.
Asymmetric Fault Current Distribution on OPGW in Overhead Transmission System
Authors: Qi Zheng , Rao Zhi , Zhang Shou Kui , Li Zhi
Published: March 2015

This paper discusses a phase component calculation model of current distribution on OPGWs when asymmetric fault occurs. The calculation is based on analysis of electric and magnetic environment and experience of actual engineering projects. Influences of some factors such as the operation mode of OPGW and resistance of power tower are mentioned to find out their influence on fault current distribution. These are applied in an actual engineer project. The calculation method is benefit for the verifying and selecting of OPGW.
Detecting Method for Harmonic and Fundamental Negative Sequence and Zero Sequence Currents in Unbalanced Three-Phase Four-Wire Circuits
Authors: Zhou Xue Song , Liu Wei , Ma You Jie
Published: March 2015

Shunt Active Power Filter (SAPF) is a new device for compensating harmonic currents in power system [1]. For unbalanced three-phase four-wire circuits, it need detect the total of harmonic and fundamental negative sequence and zero sequence currents at the same time. Base on traditional method of ip-iq, a detecting method which is suitable for unbalanced three-phase four-wire is proposed and analyzed by mathematical reasoning. At last, correctness of the result is verified by simulation.
Framework of Comprehensive Risk Assessment for Electric Cyber-Physical System
Authors: Lu Dong Xu , Liu Yan Li , Hou Kai , Qin Chao , Zeng Yuan , Qiu Jian
Published: March 2015

A framework of comprehensive risk assessment for Electric Cyber-Physical System (ECPS) is proposed in this paper. Risk factors of information system and their impact on the gird are analyzed and the method of obtaining the fault probability considering risk factors from information system is discussed. A comprehensive risk assessment model is presented and related software is developed. Research work in this paper provides a theoretical basis and software framework support to the following system development.
Micro-Grid System Integrated with GSHP
Authors: Qiu Lu , Li Yan Song
Published: March 2015

In the past few decades, power system has developed into a large-scale network system of centralized electricity generation and long-distance transmission. But in recent years, electrical load has increasing, while the grid has not developed simultaneously, it makes transmission capacity of long-distance transmission lines increase, so as the decline of stability and security of power grid. In order to achieve the goal of not only increasing utilization of renewable energy, but also solving the drawbacks of large-scale power systems, implementing distributed power generation is an effective way. Despite the advantages of distributed generation, there are many problems in itself, for example, the high cost of distributed generation stand-alone access and control difficulties. In addition, distributed generation is a non-controllable source for large grid. Then in the beginning of this century, scholars have proposed the concept of micro-grid.
Multi-Physics Modeling and Simulation of Electro-Optical Sensing
Authors: Shi Yun Fei , Liu Jun
Published: March 2015

With the rapid development of UHV technology, Electric field measurement technique has attracted lots of people's attention.Electro-optical sensors for measuring the electric field to become the main method due to the crystal optical fiber preparation and mature technology. This article describes the basic principles that Mach - Zehnder of lithium niobate optical modulator for electric field measurements.Designing the Mach - Zehnder electro-optic sensors in the Comsol Multiphysics oftware, the calculation model for the simulation results of bending radius that the optical waveguide transmission power loss minimum, a 3dB directional coupler to determine the length of the arm and finally adding a signal voltage, the applied voltage is obtained a linear relationship between the output power.
Optimal Installation Scheme of Surge Arrester on Distribution Network
Authors: Li Ao An , Yue Feng , Xi Man Cheng , Jia Zhi Yi , Ni Jun Kang , Liu Chong Xin
Published: March 2015

Surge arrester is an effective measure to protect distribution lines from lightning strikes. But high costs will be spent on the maintenance of a great many surge arresters in 10kV distribution line. Taking the relationship between reliability and economical efficiency into consideration, aiming at installation density of surge arrester, this paper established the effective simulation models of direct lightning stroke overvoltage and induced overvoltage by ATP-EMTP. Finally, this paper presented the optimal installation scheme of surge arrester on the basis of the simulation and analysis of the lightning withstand level. The simulation results provide references for the optimal installation scheme of surge arrester on the distribution network.
Research on Active Disturbance Rejection Control Strategy of Static Reactive Power Generator
Authors: Bai Jing , Zhang Yu , Duan Hui Da , Lu Shi Qi , Li Chao Chao , Liu Jian
Published: March 2015

For the shortcomings of large overshoot and poor anti-disturbance ability when using the traditional PID control, ADRC control algorithm that is a nonlinear state error feedback control algorithm has been proposed in the sophisticated control system of static reactive power generator. The simulation results show that the algorithm can make the system reactive power compensation more quickly and more effectively, therefore the control strategy is feasible.
Research on Key Technology of Time Synchronization Network in Electric Power System
Authors: Xiong Hong Zhang , Chen Xi , Teng Ling , Gao Qiang , Wang Yang
Published: March 2015

Development of intelligent grid have increasing demands for time synchronization, high precision, large scale, high performance time synchronization system has become necessary guarantee for the normal operation of the power grid. This article introduced the composition of the time synchronization system, discusses the IEEE1588 implementation of high precision clock synchronization principle and SDH data transmission principle, analysis of the PTP protocol for transmission through the principle of the SDH E1 line, gives the networking scheme of PTP over the E1 way, which meet the precision requirement of 1 us.