bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Simulation on Blasting Fume Diffusion in Blind Roadway with FLUENT
Authors: Xie Zhen Hua , Yuan Zheng Lan , Zhang Yu
Published: March 2013

Aiming at the generation of blasting fume in underground blind roadway, numerical simulation method was taken to obtain the diffusion law of the blasting fume. In accordance with the actual situation in Shachang mining area of Shouyun iron mine, the physical model and mathematical model were set up, computational grids were divided, and the boundary condition was established. The diffusion law of blasting fume and the completion time under different explosives dosage were simulated by Fluent. The laws of blasting fume diffusion and diffusion time changing with the amount of explosive in local fan forced ventilation were obtained. The results can provide a theoretical basis for the research of a reasonable and effective ventilation manner of blind roadway.
Stochastic Finite Element Theory Based on Visco-Plasto Constitution
Authors: Wang Ya Jun , Hu Yu , Zuo Zheng , Gan Xiao Qing , Dong Zhi Hong
Published: March 2013

Most geo-engineering cases have non-linearity. Particularly, the material non-linearity is an important character of geo-engineering cases. Due to the randomness of materials’ spatial variation as well as boundary conditions’ fluctuation, these cases’ study incorporates stochastic theory. Stochastic finite element method is applicable for the randomness. The visco-plasto constitution is helpful for non-linear stochastic FEM application. The algorithm for non-linear stochastic FEM was established.
Stochastic Mechanical Characteristics of Zhoushan Marine Soil Based on GDS Test System
Authors: Wang Ya Jun , Hu Yu , Zuo Zheng , Gan Xiao Qing , Dong Zhi Hong
Published: March 2013

The mechanical characteristics of Zhoushan marine soil are of importance for proper design on local ocean environmental structures. The first-hand data got from GDS system test are helpful for quantification of these structures’ design and study. The stochastic dynamic strength spectrum of Zhoushan marine soil was established based on FFT and the stochastic spectral characteristics were offered. The analysis results show that Zhoushan marine soil is possessed of random mechanical nature.
Experimental Design about Degradation Mechanism of CAM and Preliminary Experiment Results
Authors: Li Jian Zeng , Wang Jin Feng , Lin Jian Ping
Published: March 2013

Cement Asphalt Mortar (CAM) layer is the key to the structure of slab track in the high-speed railways. In the running of high-speed railways, the CAM layer must bear the action of temperature change, initial defects and trains loading, it will lead to the degradation of CAM. This paper designed the experiments to study its mechanical property under confining pressure or water erosion, tensile property, fatigue property, interface stress of CAM and concrete roadbed; it will help us to establish the failure criterion and degradation model of CAM layer. Preliminary experiment chose three confining pressures to study the mechanical property of CAM; the results indicate that peak stress and ductility of CAM greatly increase with increase of confining pressure.
The Seismic Analysis of Frame-Supported Shear Wall Structures with High Transfer Floor
Authors: Chang Xin , Ma Fu
Published: March 2013

This thesis makes an analysis of seismic performance of the frame-supported shear wall structure with high transfer floor. It focuses on the structural effect from the changes in the location of the conversion layer. Besides, rational distribution of layer stiffness of the high conversion layer structure has been mainly discussed.
Leaf Nutrient Resorption of Seagrass Zostera japonica Aschers. et Graebn. in Beihai, Guangxi, China
Authors: Shi Ya Jun , Fan Hang Qing , Qiu Guang Long , Pan Liang Hao , Li Sen
Published: March 2013

Resorption of nutrients (C, N, P, Ca, Mg, Fe and Mn) from senescent leaves of Zostera japonica and the concentration of nutrients (C, N, P, Ca, Mg, Fe and Mn) in the sediment from three subtropical seagrass meadows (Guchenling, Zhulin and Ronggenshan) in Beihai, Guangxi, China were studied. Resorption efficiencies were quantitatively assessed by comparing nutrient content between the leaf with the highest content and the senescent leaves. In addition, the relationship between nutrient resorption efficiencies and nutrient sources (the sediment and the adult leaf) were evaluated. During the course of leaf development in Z. japonica (young leaf – adult leaf – senescent leaf), C content first rose and then declined; N and P contents gradually declined; but Ca, Mg, Fe and Mn gradually rose. During leaf senescence, resorption efficiencies of C, N, P, Ca, Mg, Fe and Mn were 2.1%, 19.5%, 45.1%, −61.1%, −12.0%, −27.1% and −72.3%, respectively. For Z. japonica, C, N and P contributed to new leaf growth, whereas Ca, Mg, Fe and Mn was not. The nutrient contents of the sediment and adult leaf were not significantly correlated to leaf nutrient resorption efficiencies. It was calculated that for Z. japonica approximately 13.8% of total N demand and 31% of total P demand could be met by internal resorption.
Exploring Uncertainties in Flood Frequency Analysis Using Bayesian MCMC Method
Authors: Zhang Li Jie
Published: March 2013

The evaluation and reducing of uncertainty is central to the task of hydrological frequency analysis. In this paper a Bayesian Markov Chain Monte Carlo (MCMC) method is employed to infer the parameter values of the probabilistic distribution model and evalue the uncertainties of design flood. Comparison to the estimated results of three-parameter log-normal distribution (LN3) and the three-parameter generalized extreme value distribution (GEV), the Pearson Type 3 distribution (PIII) provides a good approximation to flood-flow data. The choice of the appropriate probabilistic model can reduce uncertainty of design flood estimation. Historical flood events might be greatly reduced uncertainty when incorporating past extreme historical data into the flood frequency analysis.
Cutoff Wall Construction Effect of Groundwater Dynamic in the Lower Area of Dagu River
Authors: Zhao Quan Sheng , Feng Juan , Guo Xin , Xu Ying , Zhang Jian Wei
Published: March 2013

In order to understand after construction cut-off wall of Dagu River downstream the influence of underground water level, and the water quality, on the basis of field investigation, observation and data collection, we use theory, mathematical statistics method, have a depth analysis on the shallow groundwater levels, water quality, temporal and spatial variation. The Dagu River downstream alluvial plain are water level low and buried shallow，present obvious seasonal rise or fall characteristics，2001 ~ 2011 years of research area of underground water level change relatively stable. It make the uplift in the upper reaches of the underground water level after Cut-off wall construction, make the change of groundwater natural runoff direction, remove the upper groundwater funnel. Until 2011, the Cl- content in groundwater of cutoff wall in the north side decreased significantly and the water quality became good, which explains that on the one hand the cutoff wall block the channel seawater intrusion, on the other hand the formed terrain conditions remains aquifers underground saltwater body washed cutoff wall in upstream.
Research on Education of Urban Planning Science Based on Constructing Scientific Issue
Authors: Huang Yong , Hu Yu
Published: March 2013

Currently urban planning teaching have some Phenomenon, including differentiation of knowledge structure system, closed of knowledge transfer process, institutional barriers of innovation evaluation, and so on. The principal contraction lies in defection of basic scientific question. According to basic facts of national urban and rural construction and human settlement theory, it is necessary for urban planning study to construct the scientific issue of the settlement process. Teaching reform will achieved from three aspects, including the curriculum module system extension, knowledge transfer process optimization and teaching evaluation system perfection.
Enhanced Adsorption for P-Chlorophenol by Ammonia Modified Activated Carbon
Authors: Yang Guo , Jie Yan , Yang Hu , Zhang Chen Hong
Published: March 2013

To investigate the influence of N-containing surface functional groups on adsorption capacity of AC, the activated carbon (AC) was modified with ammonia gas at 650 °C. Surface functional groups were quantitatively analyzing by Boehm titration. The effect of temperature on adsorption capacity suggested higher temperature is favourable. The influence of pH indicated the adsorption was favorable in acidic solution. The adsorption isotherms were fitted by Langmuir model and Freundlich model. Moreover, kinetic studies showed the adsorption of phenol onto adsorbents was followed by pseudo-second-order kinetic model. The adsorption capacity of ammoniated AC for p-chlorophenol was greatly improved.
An Ecological Suitability Assessment Method Based on Support Vector Machine
Authors: Su Jie Qiong , Wang Xuan
Published: March 2013

The ecological suitability refers to an appropriate degree of ecological conditions provided by an area for some certain use purposes. This paper developed an ecological suitability assessment method based on the principle of support vector machine which has advantages of dealing with small samples, nonlinear and high dimensional pattern recognition. The results showed that this ecological suitability assessment method reduced the uncertainty due to the mismatch between the inherent ambiguity of assessment object and the classification criteria of assessment indicators in determining the ecological suitability level, resulting in objective and reasonable assessment results. Moreover, compared with the assessment result from conventional ecological suitability assessment method, the result with this method was stricter, which was more conducive to the ecological environment protection. It provides a basis for making the ecological environment planning, and is beneficial to the coordinated development of resources use and regional ecological environment.
Construction of the Course of Environmental Economics and Management
Authors: Bi Dong Su , Hu Hong Tao , Liu Chao Nan
Published: March 2013

The world is witness pollution of environment and depletion of resources with fast development of economy and growth of population. Mankind are facing the problems that the earth is revenging mankind for destroying the nature balance, which requires proper environmental management to maintain balance between economic development and environment. To cultivate graduates with knowledge on maintenance of balance between economy and environment, Environmental Economics and Management is offered to undergraduates whose major is Environmental Engineering. Due to development of environmental management, this course requires construction to keep class teaching up-to-date with current environmental economics and management. This paper firstly analyzes conditions of this course prior to construction, and then provides a construction plan in terms of revision of teaching content, improvement of teaching methods and class modes, compiling of exercise database and test paper database.
Description of the Course Water Pollution Control
Authors: Hu Hong Tao , Cao Ping , Zheng Yi
Published: March 2013

Water Pollution control is offered to undergraduate students whose major is Environmental Engineering, to let students know basic knowledge and control technologies of water pollution, so that they can solve problems on water treatment. As one of the main special courses, it requires to be constructed to keep it up-to-date with currents wastewater treatment technologies. This paper analyzed the current conditions of this course. In addition, it described construction process and effects, including adjustment of the teaching content, improvement of teaching methods, revision of teaching mode, compiling of test database and exercise database and performance of experiments in water pollution control.
Construction of the Course of Industrial Wastewater Treatment
Authors: Bi Dong Su , Liu Chao Nan , Cao Ping
Published: March 2013

Industrial Wastewater Treatment is one of the main special courses offered to undergraduate students whose major is Environmental Engineering. It aims to let students know basic knowledge and control technologies of industrial wastewater pollution, so that they can solve problems arising from industrial wastewater. With development of nowadays industrial wastewater treatment technology, it requires to be constructed to keep the teaching content up-to-date with current industrial wastewater treatment. Based on analysis of the current conditions of this course, it describes construction process, including revision of the teaching content, improvement of teaching methods and class mode, compiling of test database and exercise database.
Seismic Response Analysis of Soil-Structure Interaction on Base Isolation Structure
Authors: Pang Ying Bo
Published: March 2013

As an effective way of passive damping, isolation technology has been widely used in all types of building structures. Currently, for its theoretical analysis, it usually follows the rigid foundation assumption and ignores soil-structure interaction, which results in calculation results distortion in conducting seismic response analysis. In this paper, three-dimensional finite element method is used to establish finite element analysis model of large chassis single-tower base isolation structure which considers and do not consider soil-structure interaction. The calculation results show that: after considering soil-structure interaction, the dynamic characteristics of the isolation structure, and seismic response are subject to varying degrees of impact.
Sensitivity Analysis and Parameter Optimization of a Hydrodynamic Model for the Aeration Chamber in a Water-Lifting Aerator
Authors: Sun Xin , Duan Fei Fei , Huang Ting Lin
Published: March 2013

A one-dimensional hydrodynamic model for the aeration chamber in the water-lifting aerator was developed on the basis of the total force balance between the driving force and flow resistance acting on the gas-liquid two-phase flow. Water velocity in the aeration chamber was predicted under different combinations of flow resistance coefficients at the top (KT) and the entrance and exit (KE), the results of sensitivity analysis showed that both KT and KE have significant effect on the predicted water velocity and gas holdup in the riser of the aeration chamber. Taking the water velocity as the main objective, flow resistance coefficients of KT and KE were optimized as and , where Ulr is the superficial water velocity. Using optimized model parameters, the water velocities were well predicted within ±7% of the measured ones respectively.
Joint Toxicity of Multiple Heavy Metal Compounds to Photobacterium phosphoreum
Authors: Li Yu , Wang Lan , Li Xiao Li , Li Xiao Peng , Jiang Long
Published: March 2013

In this article, we take photobacterium phosphoreum (T3) as indication organism, test the joint toxicity of 8 heavy metal compounds (Cu(NO3)2•3H2O, Cd(NO3)2•4H2O, Zn(NO3)2•6H2O, Pb(NO3)2, Cr(NO3)3•9H2O, Ni(NO3)2•6H2O, Co(NO3)2•6H2O, and Sr(NO3)2) with fixed ratio design method (the first two mixed systems designed using equivalent-effect concentration ratio: EC30s and EC50s, and the third one using equivalent-molar concentration ratio which the highest concentration was 0.02mmol/L lower than EC99 of each single heavy metal toxicity). The joint toxicity of the three mixed systems was assessed by Additive Index (AI). The results showed the first two mixed systems were antagonistic action and the third one was synergistic action.
An IFP Model for Carbon Footprint in Low-Carbon Urban Agglomeration under Uncertainty
Authors: Zhao Wen Jin , Wang Lun , Sun Zhao , Li Zhuang , Li Yu
Published: March 2013

This paper corrected the existing optimization model of low-carbon urban agglomeration using interval fuzzy programming (IFP) method and several constraint conditions are revised according to the 12th Five Year Plan of the urban agglomeration. The case study shows that the carbon footprint of per unit GDP of urban agglomeration was decreased by [21.95, 57.32] (%) and energy intensity was reduced by [25.89, 50.81] (%) compared with those in 2010; meanwhile, the carbon footprint of per unit GDP and energy intensity in the core area was reduced by [18.90, 34.67] (%) and [22.36, 22.76] (%) respectively, compared with those in 2010. The optimized scheme complies with the requirements of the 12th Five-Year Planning Outline of Controlling Greenhouse Gas Emission and the regional planning targets. The corrected model also provided more decision-making space for the sustainable development of low-carbon urban agglomeration.
Allocation Model of Total Energy Consumption and Pollutant Emission Control Based on Low-Carbon Economy and its Significance
Authors: Wang Xian En , Li Du Feng , Zhao Wen Jin , Li Yu
Published: March 2013

As the rapid development of Chinese economy, the total energy consumption and pollutant emission increased increasingly, which lead to a terrible situation in energy safety and environmental pollution. In the meantime, the greenhouse gas (GHG) and pollutants (such as SO2, NOx and NH3-N) generated by energy consumption increased, and the above pollutions had brought a substantial negative impact on global climate change and low-carbon economy (LCE) development. This paper analyzed the situation of energy consumption in China, and revealed the significance of total energy consumption. Energy consumption control based on LCE theory was the effective protection measure of national resources and energy security, and could promote the economic development and adjustment of industrial structure, which was investigated from three aspects expressed as three allocation models in the article. The results indicated that, energy consumption control can promote development of LCE by protecting eco-environment and sustaining security of energy and resources, and supporting steady development of our society by minimizing the utilization of energy, and the above aspects would be the key points in control of total energy consumption and pollutant emission during the 12th Five-Year Planning in China.
Analysis of Design Strategy of Regional Green Architecture
Authors: Pan Ying , Zhao Xiao Feng , Yang Zhan Chang
Published: March 2013

For developing regional green building, it is very important to absorb the traditional architectural conception of energy conservation. Based on this, this article discusses a series of regional green building design strategies focusing on four aspects. First is responding to regional material, includes making use of local materials, modern renewal of traditional material, reuse of waste materials. Second is responding to regional natural climate, includes “closed insulation + solar energy use”, "ventilation + sunshade", "active ventilation + shade + activities insulation" and active utilization strategy. Third is responding to terrain elements, includes minimum of terrain environment damage and reduction of earthwork volume. Last is responding to regional culture, including expression of traditional materials, restructuring of traditional construction, modern interpretation of traditional regional.
Constant Temperature Control of Solar Thermal Power Plant at Transient Variation of Sunlight
Authors: Liao Y.B. , Yang M. , Bi C. , Zhang K. , Song Y.Q. , Zhang B.
Published: March 2013

The constant temperature control is required for the steady output of photo thermal generator of a solar thermal power plant in the case of transient mutation of sun light . The potential risk incurred by the conventional photo thermal control system based on the temperature dependent flux control is thoroughly explored, with a proposition of a system control technique based on the law of energy conservation for the project. We present in the research that the critical factor for keeping constant temperature during photo thermal conversion is to ensure the equilibrium between input and output energy all the time between different parts of photo thermal conversion. The idea is implemented by the sun light dependent flux control. This research provides solution for overcoming the damage to susceptible system because of the transient mutation of sun light.
Analysis into Abnormal Factors Affecting the Ash Discharge Amount of Thermal Power Plant
Authors: Chen Gang , Su Wei , Chen Tian Shen
Published: March 2013

An ash yield experiment and a coal ash component analysis with the same coal sample at different temperatures showed that when a coal sample burned in a boiler furnace whose temperature was higher than 815 ° C, part of the salts (eg, sulfate) and oxides (eg, SO3) would continue to be decomposed, resulting in the actual ash yield of the coal sample decreasing compared with the theoretical ash discharge rate. At the same time, the analysts pointed out that the moisture loss and its representative defects of the as-fired coal sampling machine system, the dust removal efficiency fluctuation of the electrostatic precipitator, and the measurement deviation of the as-fired coal quantity also caused the actual ash discharge rate to be on is low side.
On the Research of Internet Equipment Naming Methods
Authors: Xiao Yu Zhi
Published: March 2013

This paper analyzes the content of Internet naming problems as well as the current exist problems .We discuss the namespace and the major technologies, and then elaborating the important thinking on research of naming problems detailed and propose development direction in the future. In the paper, we propose a new method for devices naming due to the issues that exist in the Internet naming. Using this technical, it can solve the problem of the extremely scarce IPv4 and the IP address changed frequently on Internet devices. Equipment naming scheme has five major components: equipment name registered server, equipment communication server and client domain name server and client communication agency, the client login and configuration. It is a pattern in which the mobile device uses configured client software to issue a request to NG-DNS (new generation domain system).we have analyze on the realization of the key technology on the windows system. It has realized communication among equipments which are mobile, wireless, dynamic IP address, and hidden NAT and firewall. The method can be extended entry of Android devices.
The Exploration of Data Mining in Face of Cloud Computing
Authors: Wang Chen , Li Shu Xiang
Published: March 2013

This paper first discusses the limitations and shortcomings of data mining under the conditions of massive data. Combined with the advantages of cloud computing, a data mining architecture for cloud computing is designed, and on this basis, the paper discusses the improvement of data mining algorithms for cloud computing. As a theoretical exploration, the paper proposed useful suggestions for the optimization of data mining in face of cloud computing.
A Novel Security Architecture for Peer-to-Peer IMS System
Authors: Chen Xin
Published: March 2013

Recently, some proposals suggest to use a peer-to-peer network instead of servers to facilitate SIP user registration and location in IMS communication systems. Due to the lack of central authority, security issue becomes one of the main problems in such P2P IMS systems. In this paper, we propose a novel security architecture for P2P IMS system. By using this architecture, our P2P IMS system becomes a fully distributed secure system in which there is not a central server indeed. Furthermore, our system is a scalable system which is capable of anonymous yet accountable real time communication based on SIP protocol which enables the system compatible with any existing IMS systems.
Study on Energy-Saving Technology of Fluorescent Lamp
Authors: Gao Qin Xiang
Published: March 2013

As the fluorescent lighting of colleges and universities is extensively used, the necessity of the energy-saving lighting is described and the working principle of fluorescent light is analyzed in this paper. Traditional magnetic ballasts are replaced with electronic ballasts, and radar detection module, light sensor and SCM are used to design intelligent lighting control system, fluorescent lights of different time and environments are precisely set and rationally managed, so as to achieve energy-saving purpose based on the guarantee of colleges and universities' lighting quality.
A Study on Three-Dimensional Modeling Method in Product Design Process Based on Pro/E
Authors: Zhang Jian Qi , Liu Zhi Gang , Cheng Fei Ming
Published: March 2013

Aiming at the existing problems in the process of product modeling and structure design such as of no visualized appearance, low efficiency and the easy interference of parts, a Pro/E-based product design method is proposed which, in the component pattern, conducts three-dimensional design by considering core component as reference and creates the rest parts according to modeling surface. This method effectively prevents the easy interference of parts during the process of product design, ensures the precise alignment among parts and avoids design repetition, thus greatly improves the design efficiency. Its application in the process of intelligent data acquisition terminal product design has proved the high efficiency and practicality of this design method.
Heat Transfer Technology for Textile Workshop
Authors: Yang Rui Liang , Zhu Cai Xia , Xiong Ya Fei , Xu Zi Long
Published: March 2013

Because each workshop heat quantity is different and cannot be reasonable use, the textile enterprise wastes a great deal energy in winter. To solve this problem, this paper puts forward heat transfer technology for the textile workshop, that is, heat transfer between different workshops to reasonable use heat quantity. This technology can be very good effect in energy saving. This paper introduces the principle and method of the technology, and verifies the energy saving effect of this method with engineering project, which provides technical reference for the method of the large-scale application and popularization.
The Environmental Sanitation Issues and Management Strategies of Xi’an Urban Village
Authors: Chen Meng
Published: March 2013

Urban Village is a special geographical phenomenon in the process of urbanization in China,it is an interlaced product of the history and the development of reality.As a result of the faultiness of the infrastructure of environmental sanitation,the insufficient of the outlay input,the unclearness of the management functions,the weakness of the environmental sanitation consciousness of some villagers and migrant workers and other factors,the environmental sanitation problem in Urban Village becomes more serious every day,the deep-seated problems and contradictions are already got concerns by all quarters of the society.This paper analyzes the environmental sanitation problem which exists in Urban Village of Xi'an.On this basis,this paper gives some suggestion that provides the environmental sanitary administration for reference opinions,which is to improve the environmental sanitation of Urban Villages and promote the improvement and perfection of the overall urban environmental management system.
The Study of Influence of Different 7-ACA Concentration of Pharmaceutical Wastewater on Microbial Activity of Activated Sludge
Authors: Gu Fu Guang , Chen Zhao Bo , Wang Xiao Yu , Wang Hong Cheng
Published: March 2013

This study investigate the influence of different 7-ACA concentration of pharmaceutical wastewater on microbial activity of activated sludge, the studies show that under the different influent 7-ACA concentrations, the corresponding 7-ACA concentrations of the highest value of urease and SOD activities are 0 mg/L, DHO and nitrate reductase are 50 mg/L, inverting enzyme is 40mg/L, PPO is100 mg/L. the study also show that with the increase of intermediate concentration of pharmaceutical wastewater, microbes product β-lactamase enzyme under the stimulates of 7-ACA and the activity of β-lactamase enzyme increased and then decreased. The activity of β-lactamase enzyme observed of the highest 1212.9U and the best removal effect on 7-ACA when the concentration of 7-ACA is 30mg/L. The optimal pH, temperature and DO of the microorganism product the β-lactamase enzyme were 8, 35 ° C, and 2.5 to 3.5mg/ L.
The Basic Principles of the Rural Village Wetland Sewage Treatment System in Wuhan
Authors: Gong Luo Jun , Han Wei , Li Gui Ping , Wang Lei , Li Wen Chao , Yan Qian Qian
Published: March 2013

Through the interpretation of rural environment contiguous remediation documents and the improvement of rural environment contiguous remediation in 2010-2011, we summed up three basic principles of the rural village level wetland sewage treatment system in Wuhan: principle of reaching discharge standard, building education and promotion platform and construction of two-oriented society. It also described some of the cases, and proposed the further elaborated work.
Analysis of the Ash from One Shanghai Plant Using XRD (X-Ray Diffraction)
Authors: Ma Guo Xian , Zhang Hai Ying
Published: March 2013

This study aims to develop a methodology for thermal characterization of APC (air pollution control)fly ash using XRD (X-ray diffraction). It performed XRD analysis as a function of temperature between room temperature and 1200 °C. It is found that major mineralogical components of fly ash involve SiO2, CaCl2, Ca3Si2O7, Ca2SiO40.35H2O, Ca9Si6O21H2O, K2Al2Si2O83.8H2O and AlCl34Al(OH)34H2O. Glass phases account for around 57%, which is conducive to reduction of energy in recycling of the ash. Salts decompose firstly with increase of temperature and then oxides derived from the decomposition process react with SiO2, forming silicates, calcium-silicates and aluminosilicates.
Changes in the Electrochemical Behavior of a Redox Mediator in the Presence of Humic Fractions
Authors: Pidello Alejandro , Zerbatto María E. , Faienza Hugo
Published: March 2013

Anthraquinone-2,6-disulfonate (AQDS) is a redox mediator that may modify the expression of different heterotrophic microbial functions. In this study, by means of cyclic voltammetry in an unbuffered, aprotic medium, the electroactive behavior of AQDS in the presence of natural redox effectors was assessed using an electroactive humic fraction model, named f50, isolated from virgin clay-limestone soil. When f50 was added to the AQDS solution, the electrochemical behavior was different, with a cathodic peak shift corresponding to AQDS.-  AQDS2- reaction towards the most negative potentials and a similar behavior in its anodic counterpart.
New Explanations to Law of Resource Utilization
Authors: Cai Yi Ming
Published: March 2013

The serious problems of resources and environment arising in development of human society have important ties with the scientific understanding of mankind toward the law of resource utilization. The author has demonstrated, based on the division of human resource utilization in depth and breadth spaces, the material form and nature of the depth and breadth space resources; and put forward the time model of the depth and breadth space resource utilization——a time demarcation and analysis of human resource utilization, with which we can see in the other sphere the various states of the influences of resource utilization by mankind to the environment. The continuous extension and utilization of depth space resource at one point is the core content of new explanation to resource utilization in phenomenon of “work”. The time model of the breadth space takes the carbon cycling as the example and divides the resource material cycling into three stages. The analysis by the author offers us an audio-visual and comparatively new “cross-section” in the research of depth and breadth space resource utilization, also a new and systematic explanation to the law of resource utilization.
Time Concept Definition of Depth Space Theory
Authors: Cai Yi Ming
Published: March 2013

In the material world we live in, all the substances are all in a status of motion and circulation. There is a temporal definition and analysis between the utilization of energy and other resources by human and its influence on motion, circulation of substances and the environment. Based on such definition and analysis, we can see a different state of human’s influence of resources utilization on environment at another level. The deep analysis and definition are made on depth space resources utilization at an angle of temporal dimension of energy and resources utilization.
Post-Traumatic Psychological Resilience in an Eco-Psychology Perspective
Authors: Luo Zeng Rang
Published: March 2013

The ecological psychology is interdisciplinary between ecology, psychology and ecological philosophy. Ecological psychology made trying to find the relationship of human minds crisis and the Earth's ecological crisis, and looking for the psychological roots of the ecological crisis. The ecological psychology has opened up a whole new perspective and research methods for post-traumatic psychological recovery and correctly handle the relationship between man and nature. Post-traumatic psychological resilience in an eco-psychology perspective should be as a guided by the theory of ecological psychology, starting from ecological psychology of post-traumatic resilience, to build eco-psycho- therapy system of green eco led, to achieve harmony between man and nature; reconstruction positive life philosophy, pay attention to trauma ,continue to growing. Ecological Psychology rise in the 1990s.Ecological psychology is within historical context of increasingly serious global environmental problems, influenced by trend of thought of post-modernism, guided by values of ecological philosophy, to explore the solution of the ecological crisis by the psychological and behavioral dimensions. Ecological psychology is an interdisciplinary between ecology, psychology and ecological philosophy. Ecological psychology made trying to find the relationship of human minds crisis and the Earth's ecological crisis, and looking for the psychological roots of the ecological crisis. Ecological psychology made positively efforts to explore the root causes of these crises encountered by the human society and human psychology.As a new crossed research areas, ecological psychology has opened up a new perspective and research methods for post-traumatic psychological recovery and correctly handle the relationship between man and nature, it has a significant value to deepen environmental awareness, strengthen environmental education and research and application of expand psychology.
A Survey on Abrupt Environmental Pollution Accidents in China from 2000 to 2010
Authors: Lin Nan , Feng Yu Jie , Wu Shun Ze
Published: March 2013

Based on environmental statistics data from 2000 to 2010, characteristics and spatial distribution of the abrupt environmental pollution accidents were analyzed by using descriptive statistics and GIS methods. The results showed a decline in the frequency of accidents from 2000 to 2010. Abrupt environmental pollution accidents occurrence frequency in 2010 is only equivalent to 17.42% in 2000. More than 80% of the accidents occurred in the water and air pollution. Environmental pollution and destruction accidents centralized in western and middle parts of China, mainly in Hunan, Sichuan, and Guangxi. The most frequent types of accident were safety misadventure (27), followed by illegal sewage (22), layout problem (11), traffic accident (10), natural disaster (7), long term accumulation (5), and mismanage (3).Finally, conclusions are drawn concerning the need to improve the level of environmental risk prevention and control in the environmental pollution in China.
Research on Metal Ion Removal of Ceramic Printing Wastewater
Authors: Shang Ling Ling , Shi Ce , Zhang Yong Li , Liu Yong Min
Published: March 2013

The removal of the metal ions in the ceramic printing wastewater was influenced by using, stirring and precipitating of the solution pH, coagulant PAC, coagulant aid PAM and heavy metal scavenger. This experiment investigated the removal effect of the metal ions in the wastewater under different conditions. Flame atomic absorption spectrometry was adopted for the determination of the concentration of metal ions in the wastewater. The studies have shown that alkalization, PAC coagulation treatment have a role in the removal of metal ions in the ceramic printing wastewater. And the chromium and iron removal rate can reached 74.0% and 61.6% respectively. Heavy metal scavenger also have a better role in the removal of metal ions. And the chromium and iron removal rates were 82.3% and 76.2% respectively without dosing PAC. The number of reaction cell has no significant effect on the removal of metal ions.
Optimization of Operating Conditions on Ceramic Printing Wastewater Treatment with Coagulation and Sedimentation Method
Authors: Zhang Yong Li , Yu Xu Biao , Wei Chao Hai , Shang Ling Ling , Shi Ce
Published: March 2013

The ceramic printing wastewater was treated with coagulation sedimentation method by adopted AlCl3 polymerization (PAC) as a coagulant. In order to optimize the wastewater treatment of operating conditions, with absorbance, turbidity and conductivity for testing index, the PAC dosing quantity, stirring time, stirring intensity and influx water pH value on the influence of the wastewater treatment. The results show that the wastewater absorbance and turbidity with PAC dosing quantity increase, mixing time extension and stirring intensity increase present reduced trend, with the water pH increases present first decreases trend of increase; Proper operating conditions of wastewater treatment: PAC dosing quantity 90 mg/L, mixing time 15 min, mixing strength medium speed and influx water pH value is about seven. On this condition, ceramic printing wastewater treatment of effluent decolorization rate reached 86.9%, turbidity removal rate reached 92.5%, conductivity is 2.05 x 103 s/cm.
ASTER Spectral Analysis and Lithologic Mapping in Bangong Suture, Tibet, China
Authors: Duan Yi Jun , Zhang Rui Si , Zeng Min , Chen Jian Ping
Published: March 2013

The study applies ASTER imagery for lithologic mapping in Nianqu, Gaize, Tibet, which is a part of the west segment of the Bang suture. According to the mineralogy and lithology of the study area, spectral characteristic of the rock-forming minerals and alteration minerals are analyzed. After resampling the characteristic spectra in to the ASTER spectral resolution, pertinent image processing methods are used to extract the diagnostic features of respective lithology. The results show that the methods and procedures described in this study is applicable to other relevant areas of the Bangong suture.
Research Progress in Sequences Comparison and Crystal Structure of Silk Fibroin
Authors: Yang Bao Shan , Li Jun , Wang Hui
Published: March 2013

Silk fibroin is native fibrous protein extracted from silk. It has good mechanical properties because of its unique amino acid composition, complex of sequence characterization and the transform of crystalline structure under different condition. The characteristics of silk fibroin makes it better biological biocompatibility and biodegradability and have been used widely as biomaterials in the field of tissue engineering. Based on the introduction of its properties, the researches on the amino acid composition, sequence characteristics, molecular conformation, and its performance were reviewed in this paper.
The Influence of Smelting Process on the Quality of XX Fe Based Alloy
Authors: Zhang Xiao Li , Lu Xue Cheng , Ma Chao , Yang Chun Yan , Li Ruo Lei
Published: March 2013

XX Fe based alloy was the raw material to make amorphous strip by means of vacuum induction melting (VIM) which cost too much. To reduce the cost, an air induction melting (AIM) method was studied in this paper. In smelting process of the experiments, two kinds of crucible and different slag were used to prepare different samples. The inclusions in the samples were studied by using optical microscope (OM), scanning electron microscope (SEM) and energy spectrum analysis (ESA).The results showed that, by using alkaline crucible and appropriate slag, inclusions in the XX Fe based alloy can be controlled in a relatively low range.
Impacts of Trace Elements Iron and Zinc on Phytoavailability of Heavy Metals Cadmium and Lead
Authors: Chen Su , Chao Lei , Sun Li Na , Sun Tie Heng
Published: March 2013

In this paper, the soil simulation pot experiment was carried out to study the impacts of trace elements iron (Fe) and zinc (Zn) on availability of cadmium (Cd) and lead (Pb). The self-made Cd and Pb compound contaminated soil was taken as the test soil, and wheat was taken as the test plant. The results show that with the increase in Fe dosage, overground dry weight, root dry weight, and total dry weight of wheat gradually increase; the application of Zn reduces overground dry weight, root dry weight, and total dry weight of wheat. Meanwhile, wheat biomass under Cd and Pb combined pollution is smaller than that under single Cd pollution or single Pb pollution. The application of Fe fertilizer increases Cd absorption of various parts of wheat. In the single Cd pollution treatment, with the increase in Fe dosage, Cd concentrations in roots, stems and leaves of wheat will first be increased, then decreased; in Cd and Pb combined pollution treatment, with the increase in Fe, Cd concentrations in roots, stems and leaves of wheat will also be increased. The application of Fe promotes the Pb absorption of wheat. With the increase in Fe dosage, Pb concentrations in roots, stems and leaves of wheat will first be increased, then decreased slightly. Compared with Zn0, Cd concentrations of different parts of wheat after Zn1 and Zn2 treatment increase significantly. In addition, with the increase in Zn dosage, Cd concentrations of different parts of wheat will first increase, then decrease. Regardless of single Pb pollution treatment or Cd and Pb combined pollution treatment, Pb concentrations of different parts of wheat decrease as Zn dosage increases. Under different Fe and Zn levels, and when Cd and Pb coexist, Pb can promote Cd absorption of plant, but Cd inhibits Pb absorption of plant.
Comparison of Hot Gas and Hot Plate Welding of Wood–Plastic Composites
Authors: Keskisaari Anna , Kärki Timo , Martikainen Jukka
Published: March 2013

The study concerns the welding of wood-plastic composites and the impact of their properties on weldability. The welding has been performed with two different methods: hot gas and hot plate welding. The connectivity of wood-plastic composites using different materials and two different welding methods are examined. The welding has been tested with four materials that differ slightly from each other. The different composition of materials provides information about how different materials affect the joining in the composite. The materials were made with wood flour, polypropylene, wollastonite, maleated polypropylene and lubricants with different mixtures. The weld seams have been observed by three different methods: tensile test, Brinell hardness and scanning electron microscopy. The results indicate that both welding methods are workable, and with both methods the samples were joined. Hot plate welding gave more significant strength values than hot gas welding, however. Both methods are useful, but a more detailed study to optimize the connection methods should be done.
Research on Paste-Like Impregnation Coatings for Protecting Concrete
Authors: Gu Wen Juan , Cheng Zheng Yong , Li Ying , Liu Ji Ke
Published: March 2013

The protecting of concrete, which consists of coating a chemical substance onto concrete’s surface, has been applied to architectural conservation. There is increasing interest in studying materials for concrete which can reduce the infiltration of water and salt solutions and rehabilitate and extend its service life. Silicon compounds are frequently used as a base for commercial protecting paint due to their hydrophobicity and penetrability. In this study, concrete was coated with paste-like emulsion impregnant. The factors that impact the waterproofing performance of the impregnant were investigated including the emulsifier amount, the penetration depth and the contact time. The capability of the impregnant was shown by the contact angle and the weight percent gain. The waterproofing performance of the concrete was increased after the coated with the so prepared impregnant.
Pd/Fe Nanoparticles as Catalytic Reductant Immobilized in Hydrophilized PVDF Membrane to Dechlorinate Monochloroacetic Acid
Authors: Meng Zhao Hong , Liu Hui Ling
Published: March 2013

PVDF membrane was modified by hydrophilization method, Pd/Fe nanoparticles were successful immobilized in hydrophilized PVDF membrane as catalytic reduant to dechlorinate monochloroacetic acid, the Pd/Fe nanoparticles characterized by Scanning Electron Microscopy (SEM). The hydrophilized PVDF membrane was characterized by Fourier Transform Infrared Spectroscopy (FT-IR). The PVDF membrane immobilized Pd/Fe nanoparticles (NPs) as caralytic reducant was used to dechlorinate monochloroacetic acid (MCAA), the monochloracetic acid dechlorination efficiency was high.
Effects of Surface Treatment on Adhesion of Silver Film on Glass Substrate Fabricated by Electroless Plating
Authors: Chitvoranund Natechanok , Jiemsirilers Sirithan , Kashima Dujreutai Pongkao
Published: March 2013

Silver film was fabricated on a glass substrate by electroless plating technique. Plating solution, which also known as Tollen’s reagent, consisted of three main solutions: silver nitrate solution as a silver source, ammonia and sodium hydroxide as pH controllers and D-glucose as a reducing agent. Glass surface was treated by three different methods: HF etching, SnCl2activation and SiC paper grinding. After that, a glass slide was immersed in plating solution for 90 minutes at a room temperature. The purpose of this work was to study the effects of different surface treatments on adhesion between substrate and film. X-ray diffraction (XRD) pattern confirmed that the obtained film was a silver phase. Surface morphology of glass slides, before and after plating was investigated by scanning electron microscope (SEM). Moreover, the adhesion of silver film to glass substrate was performed by crosscut test and it was indicated that combined treatment by SiC paper grinding and HF etching was the best surface treatment which provided a good adhesion of film to substrate.
The Groups and Distribution Characteristics of Fine Organic Autotrophic Particles in a Subtropical Reservoir Using Flow Cytometry
Authors: Guo Pei Yong , Wang Jin Ming , Lu Ding , Hou Xiu Fu
Published: March 2013

Flow cytometry was applied in the study of the groups and spatial distribution characteristics of the fine particles in Bantou—Shidou Reservoir, a subtropical reservoir in Xiamen,China. The fine organic autotrophic particles in reservoir could be divided into four groups conspicuously: R2 group in the smallest size with much phycoerythrin but little chlorophyll; R1 and R4 groups in relatively large size: R1 group with certain phycoerythrin and chlorophyll, while R4 group with no phycoerythrin but much chlorophyll; R3 group in the largest size with certain phycoerythrin and a large amount of chlorophyll. All the sampling stations in Shidou ( upper reaches) and Bantou ( lower reaches) reservoirs contain maximum R1 group with quantity between 35.41-46.85×106 ind/L and 23.39-43.02×106 ind/L; and minimum R3 group with quantity between 0.20-0.58×106 ind/L and 0.22-0.78×106 ind/L. The quantity of fine organic autotrophic particles is larger than that of organic azoic particles and inorganic particles. In view of the spatial distribution, R1 and R3 groups distribute unevenly in Shidou reservoir, while R2 and R4 groups change a little in quantity in different sampling stations and distribute much evenly. Moreover, in Bantou reservoir, R1, R2 and R3 groups distribute unevenly in the sampling stations, while R4 group distributes relatively evenly. The fast and multi-parameter detection capacity of Flow cytometry provides a much effective mean for the research on water fine organic autotrophic particles.