bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on HPAM Biodegradation in the Wastewater of an Oilfield
Authors: Chen Qing Guo , Bao Mu Tai , Liu Mei
Published: August 2013

The present paper studies the biodegradability of partially hydrolyzed polyacrylamide (HPAM) resulting from the waste water of an oil field after carrying out chemically based oil recovery methods. Three aerobic bacteria strains, PM-1, PM-2, PM-3 and PM-4 were isolated from the wastewater. The results indicated that PM-2, PM-3 and PM-4 had better degradability on HPAM. PM-4 showed antagonism to two other strains, whereas PM-2 and PM-3 showed synergetic effects. Primary optimized HPAM degradation conditions of mixed PM-2 and PM-3 were 35 °C ~ 45 °C of degradation temperature and 5.5~7.5 of pH. The mixed PM-2 and PM-3 showed alternative in different media and their different growth stage.
Two-Step Fabrication of Nano-PbS on Peacock Feathers Inspired by a Hair-Dyeing Method Used in Ancient Egypt
Authors: Liu Xiao Wei , Gu Jia Jun , Zhang Fang Yu
Published: August 2013

A rapid method towards nanoPbS on peacock feathers was reported and this is inspired by a hair-dyeing technology used in Ancient Egypt thousands of years ago. Original peacock feather was sulfhydrylated by 2, 3-dimercaptosuccinic acid (DMSA) dissolved in alcohol to enhance reaction sites, and then was immersed in the saturated PbO solution in calcium hydroxide and got the PbS peacock feather. The whole process is only two steps and could be completed within two hours. The morphology and structures of the sample were measured by the X-ray diffraction (XRD), Scanning electron microscopy (SEM), and transmission electron microscope (TEM) and results showed that the structure of original peacock feather was well duplicated. Compared with previous works, this method is faster and more efficient and thus has potentials to fabricate other functional sulfides.
Analysis of Influence Factors on Springback for Blade of Stamping Welded Hydrodynamic Torque Converter
Authors: Tan Yue , Ma Wen Xing , Yu Tian Ming
Published: August 2013

In order to reduce the effect of springback on the performance of stamping welded hydrodynamic torque converter in the blade manufacturing process, we carried on the numerical computation of stamping forming and springback on the pump blade of torque converter , which is based on the sheet metal forming finite element theory. Analysis of the influence factors on springback for the pump blade of torque converter includes the different die speed, die clearance, friction coefficient and sheet thickness, by which we obtained main rule effect springback of torque converter blades. This work provides an reliable basis for blades springback compensation design which can improve the forming accuracy of torque converter blades.
Evaluation of Spherical Parameterization Methods for Three-Dimensional Reconstruction of Medical Images
Authors: Wu Xing Hui , Hao Zhi Xiu
Published: August 2013

The spherical parameterization is important for the correspondence problem that is a major part of statistical shape modelling for the reconstruction of patient-specific 3D models from medical images. In this paper, we present comparative studies of five common spherical mapping methods applied to the femur and tibia models: the Issenburg et al. method, the Alexa method, the Saba et al. method, the Praun et al. method and the Shen et al. method. These methods are evaluated using three sets of measures: distortion property, geometric error and distance to standard landmarks. Results show that the Praun et al. method performs better than other methods while the Shen et al. method can be regarded as the most reliable one for providing an acceptable correspondence result. We suggest that the area preserving property can be used as a sufficient condition while the angle preserving property is not important when choosing a spherical mapping method for correspondence application.
CFD Optimization Analysis of a Cooling Fan for Mining Dump Truck
Authors: Yang Jue , Xing Wei , Fan Hui Fang
Published: August 2013

Axial flow fans are widely used in our daily lives such as automotive cooling systems, electronic appliances and air conditioning. The factors that affect the aerodynamic performance of axial flow fans include blade number, fan diameter, hub ratio, blade angle, rotating speed, etc. This paper investigates effects of hub ratio and bladenumber on the aerodynamic performance of the axial flow fan of the radiator of a dump truck we previously designed for mining. With the computational fluid dynamics (CFD) method, the fans operation condition, such as entry static pressure, effective power and flow rate, are numerically simulated with various hub ratios and blade numbers. The results of the numerical simulations are quantitatively analyzed and curves of fans performance changing with hub ratio and blade number are given. An optimization design for the cooling fan is conducted. The results of numerical simulation give conclusion that an increase of 5.6% of the vacuum static pressure and an increase of 3% of flow rate can be obtained when the hub ratio is between 500-600mm, with the same or even less power consumption. The flow rate increment reaches its peak at 8%, while power consumption efficiency is almost linearly increased, when the blade number increases to be in the range of 8 to 10. That is to say when the blade number is between 8 to 10, the fan is apparently making better use of energy. Compared with experimental method, computational fluid dynamics (CFD) method can reduce design circle and lower cost. The CFD results provide guidance to improvement of design efficiency and energy utilization.
Simulation on Vibration Friction Mechanism of Vibration Pile System
Authors: Teng Yun Nan , Li Jia , Xie Li Yang , Wen Bang Chun
Published: August 2013

Vibratory pile drivers are widely used in mechanical industry field. In this paper, the nonlinear dynamic model of vibration friction pile-soil system considering the soil friction force is proposed. By numerical simulation, the dynamics characteristics of vibration friction for pile-soil system were obtained. The results showed that with the increasing of excitation amplitude and frequency, the displacement of the pile and frame are both increased.
The Application of Three-Dimensional Digital Technology in Aircraft Assembly Process Design System
Authors: Liu Hong Jun , Ding You , Fan Qing Ming
Published: August 2013

3D digital assembly process design technology is the combination of the three dimensions and information with the new software technology in traditional process design. This article is based on an aviation manufacturing enterprises priority to the realization of the whole assembly process design, simulation and verification business process, which mainly with Dassault Companys DELMIA and 3DVIA Composer platform. In this paper, some process design thinking and methods are introduced to the aircraft product process about the separation technology division, BOM reconstruction, process simulation, 3d assembly instruction compiling, and the like. It also introduces some application methods of system integration.
Design of Multi-Mode Microwave Control Combination for InSAR System
Authors: Yuan Yuan , Yan Xue Quan , Cao Zheng Lin
Published: August 2013

This paper provides a multi-mode Microwave Control Combination (MCC) for InSAR system, where the center frequency is F0 with 800 MHz bandwidth, and the size is smaller than 355mm×480mm×155mm. A special InSAR system is introduced with finite baseline between antennas, gets the equal baseline longer by the way of MCC fast switch and makes the channel phrase satisfy the special InSAR system demand. In the MCC design, isolation between antenna channels, high-power and fast channel switch of the system are considered firstly, which are very important in finite airborne space for this InSAR system. The combination system can be changed to three working modes with different configuration but same external interface. This MCC can support average power 400w and peak power 4000w, achieve isolation between radiation channels more than 48dB and channel switch time less than 10μs.
Evaluation the Use of Tailings as a Filler in Asphalt Concrete - Wearing Course Based on Results of Laboratory Tests to the Indonesian Specification for Hot-Mix Asphalt Year 2010
Authors: Widojoko Lilies
Published: August 2013

This paper discusses the use of tailings for road pavement, especially for Asphalt Concrete Wearing Course (AC-WC) based on laboratory test results. The benefits of this study are: (1) diversification of road pavement materials, (2) the use of tailings optimally as road pavement material, (3) reduce the potential for environmental contamination. Tests on the characteristics of the tailings conducted to evaluate the properties related to its performance as a blending component. In this study, the percentage of tailings by 15%, 20% and 25% is added to the AC-WC mixture. Mix design performed by the method of Marshall. In the optimum asphalt content (OAC) the influence of water resistance and resistance to permanent deformation of sample are evaluated. The best performance is use of tailings by 20%. This mixture is not a mixture of the sensitive to inaccuracies in the asphalt mixture compared with the mixture using tailing by 15% and 25%. Wheel tracking test showed that the mixture has the smallest permanent deformation that is 2 mm.While resistance to water and temperature same for all all mixtures. This study shows that the tailings could be used as a road pavement material, which replaces the sand-sized aggregates.
Experimental Investigation on Road Marking Distress Evolution: Beyond Testing, Quality Assurance and Maintenance Improvement
Authors: Pasetto Marco , Barbati Stefano Damiano
Published: August 2013

Road markings should always be visible, readable and effective. Their performance is related to the quality of materials, their application and textural characteristics of the road pavement. The evolution of properties (visibility, skid resistance, color and durability) also depends on the product, its resistance to traffic abrasion, the application technique and adhesion between coating and substrate. This paper analyzes the results of a wide campaign of tests (over more than 4,000 km of lines) on road marking performances, with the purpose of evaluating a model for design and maintenance management. Mainly post-sprayed coatings are investigated with regard to quality controls, their frequency and protocols, according to the standards in force.
Study of Utilizing the Asset Management System into Asphalt Pavement Maintenance of Freeway
Authors: Sung Po Hsun , Lin Jyh Dong , Chen Shun Hsing , Chen Yung Lin , Yang Andrew
Published: August 2013

Asset management is a method that transferred the assets into cost to management. The main object is that to calculate the value of assets and assess the benefit of investment. When utilized the asset management method on freeway pavement management, it must been founded on assets inventory and historic maintenance. To calculate all the cost of assets could list the value of all the assets. The most important work of asset management was assessing the assets. All the assets were analyzed the survival life of all the assets and find out period of the depreciation in the study. It is 8.9 years that the period between newly construction and first maintenance. It is 4.5 years that the period between maintenances. The assess model was set by the two periods. The results cross by the assess model was that the assets service level was great.
Indoor Air Quality Assessment Based on Genetic Artificial Neural Network
Authors: Du Zhe Hua
Published: August 2013

A new method for indoor air quality assessment with training artificial neural network prediction model was presented. Genetic algorithm was used to train artificial neural network prediction model in this method. The train sample for artificial neural network learning model was grading standard. According to the weight and threshold after network study, this method could be used to make assessment on indoor air quality. The example of indoor air quality assessment demonstrated that this method improved prediction precision. This assessment method is more accurate than the traditional assessment methods. Moreover, it has the ability of global optimization, self-learning, self-adaption. This algorithm overcomes the shortcomings of traditional BP artificial neural network algorithm.
Integrating Climate Change into Strategic Environmental Assessment within the Context of China
Authors: Li Wen Chao , Ding Jie , Xu He
Published: August 2013

Climate change has been highlighted as an apparent and urgent challenge in environmental research fields, with increasing recognition that it has caused various issues such as temperature and sea level rising, season alternation changing, more frequent flood and storm and extreme events. Thus, it is deemed necessary to modify the existing environmental management system so as to cope with the challenges China is being confronted with. Actually, adverse impact is one of the key drives for incorporating climate change into Chinas strategic environmental assessment, while another is improving Chinas SEA system. This paper contributed to proposing a mechanism which helps to make Chinas SEA put full consideration on issues related to climate change. Finally, a framework where climate change is systematically integrated into SEA was demonstrated.
Discussion of Dynamic Environmental Monitoring Program in Freeway Construction Stage
Authors: Cao Li Na , Guan Wei Sheng , Lu Lin Guo
Published: August 2013

Focused on heavy pollution monitoring while ignoring ecological environmental destruction, existing environmental monitoring program also had disadvantages of unreasonable monitoring frequency setting. In order to be more scientific and reasonable, optimization design of environmental monitoring program was carried out in this paper under the principles of key monitoring by stages and modification of monitoring frequency according to the characteristics of construction process.
Distribution Characters of Fog in Chongqing and Causes of Fog in November 7, 2006
Authors: Liu Ting Ting , Han Yu , Jiang Wen Hua
Published: August 2013

The paper use the observational data of Chongqing from 1981to 2010, to analyze the spatial and the temporal distribution characters. The results are the follows: (1) Chongqing has two Foggy areas, one is the north by central region with Changshou, Fuling as the center, the other is the northwest region with Hechuan, Beibei as the center. (2) The fog mainly occurs in winter, and especially often occurs in December. (3)The number of the fog days are reduces in most Chongqing areas from 1990s to 2000s. Based on the NCEP reanalysis data, the paper analyze a fog weather, the results indicate that the wind by north at 500 hpa, the anticyclonic circulation at 700 hpa, the precipitation a few days ago, the high humidity at the lower layers and low humidity at higher layers cause the fog in November 7, 2006.
Influence of Salinity on Distribution of Ammonia-Oxidizing Bacteria in Laohe Estuarine Wetland, China
Authors: Wang Yan , Bai Jie , Zhao Yang Guo
Published: August 2013

Soil salinization in Laohe estuarine wetland is becoming more serious, thus the characteristics of AOB in different salt salinity have drawn more attention. Our study investigated the spatial and temporal distribution of ammonia-oxidizing bacteria (AOB) in different salinity soils in Laohe estuarine wetland. Results show that the largest amount of AOB appeared when salinity was 10g/kg, and decrease when salinity was higher (15g/kg, 20g/kg) or lower (2g/kg, 5g/kg). The distribution of AOB shows that the AOB amount is larger in surface layer (0-20cm) than middle layer (20-40cm) or the bottom layer (40-60cm); the AOB is more abundant in summer than autumn. Results indicate that salinity is a key factor on the AOB abundance, but not an influencer on the vertical and temporal distribution of AOB in estuarine wetland. Temperature and organic content are the related factors of the vertical distribution of AOB abundance, and the growth of reed is also an important influence factor on the variation of AOB during different seasons.
Isolation and Identification of Lactobacillus from Naturally Fermented Sauerkraut Juices in Xifeng
Authors: Yue Xi Qing , Li Xin , Wu Jun Rui , Zhang Miao
Published: August 2013

Four suspected Lactobacillus strains (XF1,XF2.XF3 and XF4) were isolated from one naturally fermented sauerkraut juice collected from Xifeng,Liaoning Province. By gram staining and catalase activity experiments,Two strains (XF1 and XF4) were retained.The strains were identified by 16S rDNA sequence analysis.The results showed that XF1 and XF4 were both identified as Lactobacillus curvatus.
Effects of the Residues of Environmental Degradable Polyethylene Film on Soil Phosphatase Activities
Authors: Fan You Guo , Luo Xue Gang , Zhang Hong Ping , Wu Ji Liang
Published: August 2013

Although environmental degradable film has been degraded from block disintegration to “rice water” appearance “dissolved” into soil environment under the natural environmental conditions effects of light, temperature, water, atmosphere and microorganisms, the "dissolved" plastic film still have serious pollution to environment which has become new hotspot of discussion. In this study, the orthogonal test L9(34) methods was applied to investigate the effects of four factors (the molecular weight of polyethylene, the amount of polyethylene residue, soil type and depth) on the soil phosphatase activities. The results indicate that the mean activity of phosphatase is 2135.7 μg /(h＊g),1472.97μg/(h＊g) and 1687.23μg/(h＊g) in the seeding, flowering and mature stage of brasscia juncea in clay soil, respectively, and 2.54, 1.56, 1.22 fold in that of sandy soil and 1.32, 0.87, 0.79 in that of loam, respectively.
QSAR Study on Toxic Effects of Polar Narcotic Organic
Authors: Cao Zhi Min , Wu Zhen Zhen , Lin Zhi Fen
Published: August 2013

Quantitative Structure Activity Relationship (QSAR) can provide greater benefits by its application on a larger scale by collecting diverse measurements of biological activity data. It can help in designing effective inhibitors by considering specific effects of various types of substituents, thus reducing trial experiments. This quantitative technology can be utilized to improve the structure of the inhibitor molecule and to interpret the improved structure in terms of favorable biological interactions. In this paper, toxic effect of polar narcotic organic is analyzed by QSAR study method.
Effect on Treating Urban Wastewater Process by Constructed Wetland Method
Authors: Yang Jian She , Ke Xiao Dan
Published: August 2013

Constructed wetland conduct technology is a kind of artificialgovernable and engineered wetland system. A multiplied technology combination of "Hydrolysis precipitation, Contact oxidation and Constructed wetland" has been applied to conduct the domestic sewage of the towns, and the combination of that, the treatment effect and the working cost have been discussed here. The testing results of outlet water quality indexes showed as following, the removal rate of the CODCr was reach to 77.8%, the removal rate of the BOD5 was reach to 83.3%, the removal rate of the T-P was reach to 87%, the removal rate of the SS was reach 80% and the removal rate of the NH3-N was reach 67%.
Spatial and Temporal Distribution of Heavy Metals Concentration in Urban Stormwater Runoff
Authors: Wang Shu Min , Yu Hui
Published: August 2013

In order to know the characteristic of spatial and temporal distribution of heavy metal concentrations in urban stormwater runoff, rainfall runoff from impervious underlying surfaces in urban region was observed during rain events. Results showed that during the precipitation process, heavy metal concentrations decreased gradually temporally (except Cd); concentrations of Fe, Cu and Zn meet Class III standard of Environmental Quality Standards for Surface Water in terminal runoff, but concentrations of Cd and Pb go beyond this standard far. Heavy metal concentrations in runoff from different types of landuses were significantly different. The arithmetic average concentrations of Fe, Cd, Cu and Zn in stormwater runoff from roof (e.g.,34.4mg/L, 0.15mg/L, 1.25mg/L and 1.23mg/L, respectively) were obviously higher than that in stormwater runoff from road (e.g., 11.8mg/L, 0.05mg/L, 0.13mg/L and 0.69mg/L, respectively).
Response of Photosynthetic Characteristics of Caragana microphylla in Different Soil Phosphorus Supplies
Authors: Gao Hui , Zhao Ting Ting , Zhao Nian Xi , Gao Yu Bao
Published: August 2013

Over the past several decades, grassland degradation has become severe in Inner Mongolia, leading to decreased grass coverage and increased distribution of Caragana microphylla. In order to find out new explanation for the expansion of C. microphylla in degraded grassland, we grew two-year seedlings in phosphorus (P) deficient soil supplemented with P supply ranging from 0 to 60 mg kg-1. The simulation parameters of light response curves and chlorophyll fluorescence parameters were all generally similar among different soil P supplies. Only maximum total photosynthetic rate (Pmax) and PSII potential activity (Fv/Fo) were reduced at 0 mg kg-1 soil supply, and high P supply caused P toxicity. C. microphylla was non-limited by P-deficiency and adapted well to the low-P Inner Mongolia steppe. The advantage of C. microphylla in P-limited natural grassland provided new explanation for the expanding of C. microphylla in degraded Inner Mongolia steppe.
Typical Pharmaceutical Process VOCs and Stench Pollution Characteristics and Control Techniques
Authors: Du Zhao , Yuan Xiang Ling , Ren Ai Ling , Fu Feng Ying
Published: August 2013

According to the pharmaceutical industry produce VOCs and stench of atmospheric environment pollution, combined with typical pharmaceutical biological fermentation and chemical synthesis process of VOCs and odour pollution are classified 4 types:fermentation tail gas, recycling of exhaust gas, exhaust gas and wastewater workshop stench. The control technology should be selected according to the four types of waste characteristics.
On the Accumulating Characteristics of Nuclide Cs in Chenopodium Album Linn, the Hyper-Accumulator Plant
Authors: Zhang Yu , Tao Zong Ya
Published: August 2013

Studying and screening nuclide hyper-accumulator plants and their planting methods for rapid and effective radioactive decontamination in the environment is the vital study content of the environmental radioactive contamination rehabilitation and control. This study measures and analyzes the accumulating amount and characteristics of Cs in Chenopodium album Linn by taking Chenopodium album Linn as the experimental material and CsCl solutions at different concentrations as the treatment factors, and applying the technology of pot culture to simulate the natural contaminate environment with radioactive nuclide Cs. The results indicate that the accumulating amount of Cs in Chenopodium album Linn increases as the CsCl concentration rises. The accumulating amount in the above-ground plant parts reaches the highest level of 0.964mg/g DW as the CsCl concentration reaches its highest one of 100mg/Kg; and that in the underground counterparts is 0.306mg/g DW. The accumulating amount of S (of the above-ground plant parts) /R (of the underground counterparts) > 1, having the basic characteristics of Cs hyper-accumulator plants.
The Analysis and Operation Control for the Gypsum’s Low Purity of Wet FGD
Authors: Zhou Xiao Xiang , Zhang Xue Ying , Dong Xue Feng
Published: August 2013

Gypsum is the main product of wet desulfurization, combined with the actual operating conditions of desulfurization unit, the factors affecting the purity of gypsum is analyzed. Combining with the comprehensive utilization of gypsum requirements, from every aspect of characteristics of coal, limestone’s quality and operation control, improve the gypsum’s quality of wet desulfurization in coal-fired plant.
Progress of Removing Heavy Metals by Zero Valent Iron Nanoparticles from Wastewater
Authors: Guo Jing Jing , Fan Ming De
Published: August 2013

Heavy metal pollution is a serious threat to human health. Because of the development of nanotechnology, removal of heavy metal is more convenient and effective. nanozero valent iron (Fe0) particles have high activity and specific surface area. At present, Fe0 nanoparticles have been used in the processing of refractory organics, heavy metals, inorganic salts, soil restoration, and other areas of the environment. But the dispersion and stability of the Fe0 nanoparticles are poor. We can improve physical and chemical properties of Fe0 by adding carrier materials to make iron nanoparticles have better stability, dispersion and the treatment effect. This paper mainly introduced the situation of removing heavy metals by the Fe0 nanoparticles and hybridized Fe0 particles. Hybridized Fe0 has good performance and high removal efficiency to heavy metals. We also discussed what are inadequate and need to be further researched.
Effect of Dissolved Ca2+ and Mg2+ in Excess Sludge on Phosphorus and Nitrogen Recovery under Acidic-Base Condition
Authors: Yuan Hong Ying , Wang Ting , Chen Yi , Qi Li , Niu Si Fang
Published: August 2013

Calcium(Ca2+) and magnesium(Mg2+) ions dissolve out in the process of getting phosphorus-rich solution by hydrolysis and acidification of sludge. To study the effect of dissolved Ca2+ and Mg2+ on nitrogen and phosphorus recovery, this paper investigated the dissolution of NH4+, PO43-, Ca2+ and Mg2+ in the process of hydrolysis and acidification of excess sludge under the condition of different pH and discussed the impact of Ca2+ and Mg2+ ions on the recovery of nitrogen and phosphorus by struvite precipitation method. The result indicates that the adjusting of acid-base environment can contribute to the release of NH4+-N and PO43--P in the process of hydrolysis and acidification and pH=3 is the best and the best reaction time is 5 days. The fact that the molar ratio Ca2+: Mg2+ is greater than 1 has influence on nitrogen and phosphorus recovery but whether additional magnesium existed or not has little effect on the percent recovery of nitrogen and phosphorus when pH=3.
Comparison of One-Phase and Two-Phase Anaerobic Digestion of Swine Manure
Authors: Liu Wen Hao , Tian Shi Jie , Wu Shu Biao , Zhang Xiao Qian , Pang Chang Le , Dong Ren Jie
Published: August 2013

The possible exploitation of two-phase anaerobic digestion for swine manure was investigated in this study. One-phase and two-phase anaerobic digestion process were investigated in continuous stirred-tank reactor with hydraulic retention times 15 days (hydrolysis and acidification for 3 days and methanogenic12 days in two-phase). When the organic loading rates were equal to or less than 4 g VS/L day, the biogas yield and volumetric production of two processes were no significant difference. However, in the case of organic loading rates being equal to or higher than 5.0 g VS/L day, two-phase biogas yield and volumetric biogas production averaged 0.294 L CH4/g VS added and 2.218 L/L day, compared with one-phase averaged 0.255L CH4/g VS added and 2.168 L/L day, respectively. Significant advantages in saving cost of biogas project were indicated by the comparison of biogas production and COD degradation in the one-phase and two-phase processes.
Laboratory Treatments of EAF Slag for its Use in Construction
Authors: Yang Qi Xing , Haase Björn , Han Feng Lan , Engström Fredrik , Li Jian Li , Xu An Jun , Björkman Bo
Published: August 2013

Laboratory treatments of a plant EAF slag sample 71686 were conducted using stabilizers containing P2O5and air granulation. The results show that it is necessary to add the stabilizers to increase contents of P2O5from 0.39% to 0.7% for the slag stabilization. By a fast air cooling, most of the granules from the granulation are spherical, with a low internal porosity and dense structure. Content of Fe2O3in the granules increased from 7.92% to 18.4% and FeO decreased from 14.3% to 7.8%, due to an oxidation during the slag granulation. Contents of metal elements, As, Cd, Cr, Mo, Pb, Ni and Zn, in the leachates from the treated slag samples were lower than the limit values for leaching from inert wastes pursuant to Directive 1999/31/EC. The slag samples after the treatments may then be regarded as environmentally friendly to use in construction.
A Study on the Preparation and Flocculation Properties of Boracic Poly-Aluminum-Ferric-Silicate
Authors: Tian Xiao Wei , Han Chun Ying , Zhang Li Dan , Du Wei Zhao , Li Zeng He
Published: August 2013

The boracic poly-aluminum-ferric-silicate (B-PSAF) coagulant was prepared by water solution co-polymerization method, which was synthesized from sodium silicate, aluminum sulfate, ferric chloride and sodium borate. In addition, the best molar ratio of boron and silicon was determined by single factor process. The micro-morphology and structure of B-PSAF were studied by scanning electronic microscope (SEM) and Fourier transform infrared spectrum (FT-IR). It has been studied the operation of B-PSAF as the flocculating agent, the dosage and its effects on the flocculability. Experiments show that B-PSAF is a good effective flocculant, which can be used to treat alkaline dyeing wastewater and it has the features of less consumption, rapid coagulation and high removal rate of CODCr.
Environmental Effects and Efficient Utilization Research Mode of Yantai Dagujia River Resources Development
Authors: Li Xiang Ran , Qiao You Qian , Fu Chang Lu
Published: August 2013

Natural water cycle is of river-basin characteristic, with obvious river-basin regularity in formation, movement and change. The development and utilization of river-basin water resources are of important significance to solve the shortage of water resources. Dagujia river is the second largest river in Yantai. But with fast development of social economy and population growth of Yantai city, Dagujia river resources have been overexploited, resulting in corresponding environmental effects. Based on the thorough investigation of the current water resources utilization, the paper analyses the production and the change trend of environmental effects and discusses projects and management mode in order to achieve efficient utilization of water resources.
Influence of Tidal Gate on Hydrodynamic and Sedimentary Environment
Authors: Mu Jin Bin , Huang Shi Chang
Published: August 2013

Effect on hydrodynamic and sedimentary environment is the key problem of gate construction at tidal estuaries. It cites an instance with the gate of HY River in Sanmen Bay. Based on analyzing the character of the water and sediment, the 2D mathematical model was established. Based on triangle grid and finite volume method, the shallow flow model is examined by 10 tidal level stations and 11 observed synchronous vertical lines. And the comparison between computed result and measured solution demonstrates very good agreement. Though this model, the variation of hydrodynamic law has been studied for the HY gate building. Combining the empirical formulas and fluvial processes analyses, it predicted the sediment siltation law and features of gate construction. And the effect of the key sensitive point has been discussed mainly. The result shows that the tidal flow capacity of downstream area is reduction, and siltation at downstream area of tidal gate. It provides the scientific foundation for the construction of the gates.
Effects of Temperature on the Adsorption and Desorption of Tetracycline in Soils
Authors: Bao Yan Jiao , Ding Hong Sheng , Bao Yan Yu
Published: August 2013

Batch experiments of OECD Guide were conducted to the adsorption and desorption of tetracycline in soils. The adsorption and desorption isotherms of tetracycline in cinnamon soil and red soil were expressed well by the Freundlich equation at 20, 25 and 35°C. According to lg Kf and 1/n values of fitting parameters, tetracycline was strongly adsorbed by two soils with adsorption capacity (lg Kf) values from 3.06 to 3.59. Temperature from 20 to 30°C had little effects on the tetracycline adsorption in two soils. Thermodynamic parameters depict the exothermic nature of adsorption, and the process was favorable and spontaneous. Hysteresis effect was observed. The maximum adsorption capacity and hysteresis index of tetracycline were found at 20°C for cinnamon soil and 30°C for red soil, so there was little risk of tetracycline remobilization with temperature lower than 25°C in cinnamon soil or higher than 25°C in red soil.
Numerical Investigation of the Upper Ocean Response to the Typhoon Winnie (1997) Using an Air-Sea Coupled Model
Authors: Huang Li Wen , Ge Yi Jun
Published: August 2013

In order to investigate the impact of air-sea interaction on the ocean surface mixed layer, Typhoon Winnie (1997) was numerical simulated with a two-way air-sea coupled model MCM (Mesoscale Coupled Model). It shows that the Sea Surface Temperature (SST) decreases over a large area with a magnitude up to 4°C. The sea temperature at 30-50 m depth increases about 1°C corresponding to the surface cooling. Moreover, the oceanic mixed layer depth deepens by 20-30 m. It can be included that these variations in the upper ocean are mainly due to vertical mixing induced by the wind stress of the typhoon.
The Grey Relational Analysis between Industrial Structure and Water Resource Consumption in Jing-Jin-Ji Region of China
Authors: Xu Zhi Wei
Published: August 2013

Jing-Jin-Ji region of China is facing a contradiction between economic development and water resource shortage. The basic work to strengthen water resource management is finding out what the relation between industrial structure and water resource consumption is. The article measures the correlation by the grey relational analysis. The result is that Hebei province has a lowest grey relational grade in primary industry. Tianjin and Beijing has a relatively weak correlation in secondary industry and tertiary industry separately. The conclusion provides a direction for water resource optimization and cooperation within the region.
The Hydrogen and Oxygen Isotopic Analysis of Geothermal Water in Guihu
Authors: Zhang Mu Yuan , Chen Qiu Yang , Wang Yan Ran , Feng Kai
Published: August 2013

Geothermal resources are abundantly available, low-cost, renewable, and clean. Therefore, the exploitation and utilization of geothermal resources would exert a great influence on society and economy. Fuzhou geothermal, which is on behalf of the medium and low temperature magmatite rock fissure type geothermal, is often with surface thermal manifestations and distributes zonally along the tectonic fissures. Aiming to investigate the origin of the Fuzhou geothermal field, this paper takes Fuzhou Guihu geothermal field as the research object, analyzing its geothermal background of regional tectonic characteristics. Special analyses of the geothermal water chemical and isotopic characteristics (including the formation and origin mode of ground water constants and trace elements, D/18O isotopes) revealed that the underground hot water of Guihu was originated from precipitation and formed by the heating effect of the deep geothermal circulation. Based on isotopic fractionation, the calculated precipitation infiltration recharge elevation for the Guihu geothermal water is 536.3m. In the light of the surrounding topography, it is reasonably inferred that the Jialiang Mountain is the recharge source of the Guihu geothermal water.
Indicator System Construction for Recycling Society
Authors: Ning Shu Kuang , Wang Shih Hung
Published: August 2013

For the justice between generations, the concept of sustainable development has become the tendency of national development in 21 century. The guideline and indicator system for sustainable development were established already in Taiwan. The issues of eco-city, health-city or sustainable city have discussed in several cities these years. However, the key point of sustainable development is to reduce consumption of resources. A recycling-based society is the ultimate aim. In this research, issue-based indicator framework was adopted to construct an indicator system focused on the assessment of recycling representation in a city. With the considerations of resource input and recycling, the performance of resources utilization can be realized. Top five cities in Taiwan were selected as the case study. Other assessment results from existed indicator systems were compared with the proposed indicator system for distinguished the difference between various systems.
Approach of Soil and Water Conservation on Desilting Highland in Typical Irrigation Area from the Lower Yellow River
Authors: Liu Rui Feng , Jiang Hai Bo , Liu Xin Bing , Ma Liang
Published: August 2013

Exampled by Weishan irrigated area, the largest irrigation area in the lower basin of Yellow River, this study summarizes the experience of erosion controlling on desilting highland for years and proposes comprehensive control modes including water diversion irrigation management. After taking the engineering measures such as land leveling, soil mulching and land planishing and the vegetation measures such as slope protection by highland vegetation and shelterbelt network, the desilting highland in Weishan irrigation area was overall controlled, soil erosion and ecological environment deterioration have been restrained effectively.
Respond of Plant Growth and Soil Water-Salt to Different Irrigation Amounts in Little Thickness Aeration Zone in the Hinterland of Taklimakan Desert
Authors: Jin Xiao Jun , Fan Jing Long , Xu Bo , Li Bing Wen , Xu Xin Wen
Published: August 2013

In order to clarify the influence of saline water irrigation to plant growth and distribution ofsoil water-salt, and providing theoretical basis for sustainable water supply of ecological constructionin desert area, the data of soil water-salt and plant growth was observed at Tarim Desert HighwayShelter-forest Ecological Project No. 17 well. The law of soil water and salt spatial distribution wasanalyzed, and the responses of plant growth to 4 different irrigation amounts were studied by singleelement variance analysis. The results were as follows: the soil water content reaches or is close tosaturation in layer of 100~120cm under the 420mm irrigation water condition; The soil water contentreaches or is close to saturation in layer of 160~180cm under the 233.1mm irrigation water condition;The soil water content reaches or is close to saturation in layer of 180~200cm under the 285.6mm irrigation water condition; The soil water content reaches or is close to saturation in layer of160~180cm under the 201.6mm irrigation water condition. The vertical distribution law of soilssalinity is that the soil salt can enter groundwater after 3 days of irrigation, and be gathered in 0~30cmsoil layer. There were no significant differences except the Tamarix plant height in plant growthindexes among 4 different irrigation quantities treatments.
Lanshan Port Environmental Protection Countermeasure Research - Based on the Sustainable Development
Authors: Shang Jin Rui
Published: August 2013

This essay established port environmental strategy evaluation system, and formulated an actual and practical environmental strategy implementation security system in the light of the present environmental protection situation: to implement green enterprise culture, to constantly improve green management system, and to establish environmental risk emergency and protection system and sustainable development of ecological supporting system.
Research on the Coordination of Economy and Environment for Poyang Lake Ecological Economic Zone
Authors: Liu Chuan Kui , Wang You Yuan
Published: August 2013

It is a very important problem that economic and environmental coordinated development in PLEEZ. This paper found economic and environmental systems, a quantitative method was proposed which systemic coordinated evaluation based on the principal component analysis and system index of sustainable development for PLEEZ, the conclusions provide a useful reference to economic development and environmental protection coordination of PLEEZ.
The Coupling Development between Tourism Economy and Ecological Environment in Harbin City
Authors: Xuan Fu Hua
Published: August 2013

The rapid development of tourism has brought us great economic benefits. However, more and more negative effect on ecology has begun to emerge with large resources and energy consumption. At present, how to improve harmonious development of tourism economy and ecological environment has been a study focus. The mathematic model of the relationship between tourism economy and ecological environment was constructed in this paper, in order to achieve an empirical analysis on the harmonious development of tourism economy and the ecological environment in Harbin City from 2000 and 2010. The results shows that the alternative augmentation of tourism economy and the ecological environment has improved from being slight disorder to being primary coordinated. The tourism economy and the ecological environment share a positive interaction and harmonious development with a coupling coordination. Nevertheless, the level of coupling degree and coordination is still too low. And some countermeasures should be taken to promote the sustainable development of tourism.
Fire Risk Forecast and Early Warning Technology for Large Oil and Gas Storage & Transport Tank Areas
Authors: Liu Xuan Ya , Wang Xiao Zhou
Published: August 2013

According to the characteristics of the storage and transportation working functions in large oil and gas storage tank areas, based on the analysis of equipments leakages, fires, explosion and other disaster scenes and accidents evolution model in the tank areas, the effect factors of the tanks area fire risk were studied. Combined with the analysis of key equipments and process fittings failure probabilities and tank fire-fighting equipments effectiveness, the fire and explosion accidents forecast analysis methods based on the dynamic monitoring technology were put forward. Through the analysis of the critical temperature, pressure, liquid level, gas concentration and other state parameters of the oil and gas storage tank equipments failure, using the advanced information technologies (GIS geographic information system, RS remote sensing and telemetry systems, etc.) and remote singles monitor technologies, the status parameters of dangerous materials and process equipments can be carried out with real time measurement and monitoring.
Study on the Coupled Coordination Degrees between Urban Land Intensive Use System and Social Economic Development - A Case of Shandong Province
Authors: Gong Shao Yan
Published: August 2013

On the basis of the construction of index system, by the factor analysis and the model of coupled coordination degree, the coupled coordination degrees in 2005 and 2010 between development of urban land intensive use system and social economic system are studied in 17 ground level cities of Shandong province. The first results showed that f (x) and f (y) in 2010 were higher than in 2005, which indicated that the degree of urban land intensive use and development level of the social economy were improved. The second results was that the coupled coordination degree of two systems was higher than in 2005, but if f (x) and f (y) were smaller, the gap in the capacity of comprehensive coordination was larger, the coupled coordination degrees were the smaller. So comprehensive development levels in single system were improved, which could not promote positive development between two systems.
Research on the Problems of Abandoned Farmlands in Hilly Areas of Sichuan - Based on the Field Research in Nanchong's Huofeng Village
Authors: Xu Deng Yao , Chen Yan Jia , Zhang Gao Hua
Published: August 2013

In recent years, the issue of migrant workers as well as the protection of farmland has been attracting wide attention from society. And it is related to another more serious problem——at least 30% of the arable land is abandoned prevalently in the Midwest and it is spreading, which has a direct impact on the food security of the country. Because it is too complicated to solve, and there is no way to overcome the phenomenon. The author takes abandoned farmlands in Huofeng village Gaoping district, Nanchong city, Sichuan Province for example, and makes generalization and summary to the farmlands abandoned phenomenon as well as its reason through the fieldwork investigation. And meanwhile, make some suggestions about solving the problem of rural areas’ abandoned farmlands in the hilly areas and hope to draw universal attention of the whole society on the phenomenon of abandoned farmlands in rural areas.
CrVI Adsorption Using Black Nickel Mud as Adsorbent
Authors: Soldán Maroš , Bartošová Alica , Ševčíková Janka
Published: August 2013

Rapid industrialization and usage of heavy metals in industrial processes have resulted in unprecedented increase in the heavy metal flux into groundwater. Hexavalent chromium is one of elements with high health risks such as mutagenicity and carcinogenicity. Adsorption is economically feasible alternative of chromium removal. We have used spectrophotometric method for monitoring of hexavalent chromium adsorption from aqueous solution with the use of black as adsorbent. We have monitored the influence of temperature and surface treatment on the adsorption process.
Snow Disaster Risk Assessment in China with the Multi-Layer Fuzzy Comprehensive Evaluation Method
Authors: Lv Chao , Gong Hui Li
Published: August 2013

The snow disaster is one of the main disasters in prairie pastoral areas of China. Once the snow disaster occurs, it will cause the death of a large amount of livestock due to the starvation and freezing weather. Therefore, it is especially important to forecast the risk of the snow disaster scientifically and reasonably. This paper established the snow disaster risk assessment index system firstly, and then established the snow disaster risk assessment model based on multi-layer fuzzy comprehensive evaluation. Finally, the massive experiment monitors and the contrast confirmation with the historical case data, showed that this model is practical and feasible, which conducted a useful attempt to further improve snow disaster risk assessment ability in pastoral areas.
Ecosystem Health Assessment of Guangzhou City
Authors: Liu Hui
Published: August 2013

Guangzhou urban ecosystem health evaluation index system was built by the connotation of urban ecosystem health and the actual situation in Guangzhou city. The system concluded five indexes such as vigor, organizational structure, resilience, ecosystem services and health status of populations. Each index weight was calculated with entropy-weight method,and comprehensive evaluation model was established to assess the urban ecosystem health level of Guangzhou city. The results showed that the health status of the ecosystem of Guangzhou city was good in 2010. High energy consumption, the R & D expenditure, environmental protection investment, urban public green space and Engel coefficient had exerted influence on the healthy development of Guangzhou city. Thereby, strategies and measures should be put forward in an attempt to provide some background information an d programming reference for the sustainable development of the city.
Design of Fuzzy Self-Tunning Controller for Permanent Magnet Synchronous Motor
Authors: Peng Xiao Feng , Xu Peng , Zhang Li , Wan Wen Lue
Published: August 2013

Permanent magnet synchronous motors(PMSM) as a representative of high efficiency motor was being used widely in the area of medium and small-sized power, high-accuracy,high reliability and wide-scope speed governing servo system.Otherwise,because traditional PI controller can not satisfy the high-performance of PMSM servo system,Fuzzy self-tuning PI(Fuzzy-PI) control method was used in this system, and proportion and integral parameter of PI controller is optimized by fuzzy logic.By simulation experiment, it was proved that Fuzzy-PI method had more steady and less q-axis current pulse to PI control in the transition procedure of PMSM governing.