bluuebunny/crossref_metadata_2025 huggingface dataset:
Cementing Leakproof Research and Application in JiLin HaiTuoZi Exploration Area
Authors: Liu Qing Wang , Wang Yong An , Fan Zhen Zhong , Wang Ji Gang , Zhan Ning Ning
Published: March 2013

A long period of development in Haituozi exploration area, downhole conditions are constantly changing, increasingly complex, and the original cementing technology is difficult to solve the region's low pressure leakage problems. For the special circumstances of the region, we set up a special research team, focus on starting from the the preferred cement slurry system, and improve stability, toughness, plugging, leak-proof ability of the slurry system performance; Another optimization cementing design and perfect cementing supporting measures effectively solve the region's dropout problem.
Expansion Slurry System Research
Authors: Fan Zhen Zhong , Zhang Li Feng , Liu Qing Wang , Wang Ji Gang , Zhan Ning Ning , Zhou Wen Bin
Published: March 2013

In-depth development of a block of Sudan, effectively develop the rich reserves of the major reservoirs, increase crude oil production, and reduce the cost of drilling.This horizon has a high penetration, high formation temperature, easy to collapse, gas channeling and complex problem, there is a great test of this case to horizontal wells cementing.Therefore, develop a new expansion slurry system,which has the feature of high-strength, low water loss, gas channeling effect, solves the region problems of cementing technical. A block of Sudan formation pressure coefficient is low, fracture pressure is small, strata is sulfur loose sandstone, and stratigraphic diagenetic is poor, easy to collapse and necking.With the deepening of the development ,these issues are more and more obvious.In order to achieve the best results in the horizontal well cementing operations, we research from geological data, well structure, cementing formulations and process in-depth and meticulous. Solve the high permeability formation temperature, easy to collapse, gas channeling technical problems, develope a new type of high-strength, low water loss, micro-expansion slurry system, and effectively solve the block problem of horizontal wells cementing .
Experimental Study on Reducing Water Phase Trapping in Tight Gas Reservoirs
Authors: Zhang Hao , Feng Xiao Ning , She Ji Ping , Huang Fu You , Li Guan Fang
Published: March 2013

This document explains and demonstrates how to reduce water phase trapping in tight gas reservoirs during drilling. The water phase trapping laboratory device and experiment method has been studied, through the experiments on reservoir water phase trapping of western Sichuan Basin in China, Knowing that the damage is very serious, water self absorption experiments with different periods show that porosity and permeability of cores are basically above 50%. for the reason, the high capillary pressure and low water saturation are the main factors. Water phase trapping damage prevention measures has been put forward, including avoiding using water-based operating fluid as much as possible, minimizing or even avoiding the invasion of water-based operating fluid, and reducing interfacial tension and promote smooth operating fluid flow back.
Study on Technical Limits of Single-Pipe Concatenation Gathering Process during High Water-Cut Stage
Authors: Wei Li Xin , Le Xin Peng , Fu Yun Xia , Wang Zhi Hua , Wang Yu
Published: March 2013

In order to optimize the gathering system and reduce the energy consumption in the production, single-pipe concatenation process has been widely used after the tertiary oil recovery technique is applied and development enters into high water cut stage in the oilfield. Aiming at condensate oil in gathering pipeline and obvious increase of the high circle pressure wells in the operation of the process, the adaption relationship between oil gathering pipeline size and flow, as well as the temperature limit of the gathering system start are studied, through the hydraulic and thermodynamic calculations of oil-gas-water multiphase flow. It has directive function for making effective schemes to solve the production problems caused by the high back pressure of wells.
Evaluation of Favorable Area in the Weibei Coalbed Methane Field: a Study by Using Grey Correlation Analysis
Authors: Li Ying , Liu Da Meng , Yao Yan Bin , Wang Xiao Hong , Yin Zhao Wei
Published: March 2013

Based on the gas analysis results of coalbed methane (CBM) wells in the Weibei CBM field, two main recoverable target seams (Nos. 5 and 11) were evaluated for the potential of exploration and exploitation by using the grey correlation analysis method. The main influnce factors on the CBM potential by increasing importance are gas content, gas saturation, buried depth, methane concentration, critical desorption pressure,reservoir pressure and coal thickness for the No.5 coal seam; while they are gas saturation, gas content, critical desorption pressure, methane concentration, buried depth, reservoir pressure and coal thickness for the No.11 coal seam. The exploration potential of No.5 coal seam is better than that of No.11. The favorable area for CBM exploration are the areas including Well block W2, W3, W4 and W8 in the middle of Weibei CBM field.
Improving Hydrogen Peroxide Bleaching of PRC-APMP by Using Urea
Authors: Li Zong Quan , Dou Hong Yan , Chen Xiao Qian , Wang Chao
Published: March 2013

Preconditioning Refiner Chemic Alkaline Peroxide Mechanical Pulp (PRC-APMP) is one of the most currently used high yield pulps in China. During the bleaching of PRC-APMP, hydrogen peroxide is a commonly used bleaching agent. In order to improve the bleaching efficiency of PRC-APMP, urea was used as an activator in peroxide bleaching of aspen PRC-APMP. The results showed that the brightness of the urea-based bleached pulp higher than that without urea addition at the same hydrogen peroxide dosage. The physical properties such as the breaking length, tear index and fiber length of the bleached pulp were comparable to those without urea addition in peroxide bleaching.
Study on the Reasons and Prevention Technology of Abnormal Methane Emission in Fracture Development Region in Limestone
Authors: Yuan Jun Wei , Wang Kai , Jiang Xiao Gai
Published: March 2013

Analysis and research on the reasons for abnormal methane emission in local coal seams were given through Gas-geology Theories in this article, considering the practical conditions in Yitang Mine and the current situation that low gas emission while frequent occurrence of disastrous gas accidents in some mines. Geological tectonism was mainly responsible for the mass storage of free form gas in fracture, for it crushed and broke the original reservoir and contributed to fracture development in roof limestone. The centralized release of free form gas caused abnormal methane emission in local when these fractures were disturbed by mining activities. Hereby, feasible measures for gas prevention were taken to ensure safety production. The results had provided constructive guidance for gas prevention and control in similar coal seams or mines.
Research and Evaluation of Water-Based Pipe Freeing Agent SJK-1
Authors: Chen Yong Sheng , Li Yong Jiang , Li Ling , Qiao Meng Zhan , He Shui Liang , Ji Na
Published: March 2013

Sticking pipe has been being a common problem in drilling process. There are several techniques to solve sticking pipe which caused by differential pressure. But all of the techniques are inefficiency and the common oil-based pipe freeing agent is unsafe and pollution. So the water-based pipe freeing agent, SJK-1, has been developed. This kind of pipe freeing agent is cheaper, safer and more effective.
Low Temperature Selective Catalytic Reduction of NOx with NH3 over MnOx /TiO2 Catalyst
Authors: Xie Jun Lin , Fu Zheng Bing , He Feng , Fang De
Published: March 2013

Amorphous phase MnOx/TiO2 catalysts were prepared by two different methods, their catalytic activities for low temperature selective catalytic reduction (SCR) of NOx with NH3 in the presence of excess oxygen were investigated. The catalysts were characterized by XRD, XPS and HRTEM. The results showed that the catalyst prepared by soft template method had better catalytic active than those prepared by sol-gel method, its catalytic property could reach 98.2% at 200°C. From the microstructure characterization, it could be known that the catalyst prepared by soft template had the shape of nanorod, this shape was contributed to the dispersion of the manganese oxides and possessed higher surface lattice oxygen concentration. Furthermore, narrow slit-shaped pores associated with rod-like particles could provide efficient transport pathways to reactant molecules and products. Due to these, the catalyst performed catalytic active very well.
A Study of Engineering Properties of Concrete Containing Recycled Materials in Hot Spring Environment
Authors: Chang Jung Nan , Chen Bo Tsun , Wang Her Yung , Chen Jung Wei
Published: March 2013

Taiwan is gifted with special geothermal resources, such as hot springs. In recent years, due to rapid development of the hot spring tourism and medical industry, massive constructions at the side slopes in hot spring areas are requiring the large amount of concrete material. Thus, the engineering properties of concrete material in the hot spring environment are an important research subject. Taiwan yields a large output of fly ash, slag and waste LCD glass annually. If these recycled materials can be added into concrete materials as mineral admixture, the construction quality will be improved, while contributing to waste reduction. Therefore, this study used the concrete without and with different recycled materials (e.g., slag, fly ash and glass waste powder) respectively to make specimens in fixed water-binder ratio W/B=0.44, and tested the compressive strength, splitting strength, ultrasonic pulse velocity and rate of volume change in general water curing and hot spring water curing conditions. The results showed that the strength deterioration and volume expansion of the concrete with recycled materials could be postponed in the hot spring water environment, and the glass waste powder had the best effect.
Application of New Environmentally Friendly Materials in Clothing
Authors: Yang Yong , Ma Da Li
Published: March 2013

With the development of society, the clothing industry has entered the period of material priority. With the increasingly view on health, "Green"and environmentally friendly clothing is about to apply and popularize. Hereby the article focuses on some new environmentally friendly materials, such as Bamboo fiber, Tencel fiber etc. Explanation of the function and specialty has been given separately. It is not only meet the consumers`need of fashion and health, but also very important in environment protection in current greenism.
Elaboration and Pore Size Control of Macro Porous Carbonized Material by Pyrolysis of Resin/Carbon Composite
Authors: Aroua Sadjia , Lounis Azeddine , Condom Sylvie
Published: March 2013

Our purpose aims to introduce a contribution to the water filtration field with a potentially low cost carbon membrane. Porous carbonized material were prepared with predefined porosity of 0.1µm to be used as a support for nanofiltration and microfiltration membranes A composite material has been prepared by incorporation of activated carbon powder in a thermosetting resin, which underwent later a heat treatment under nitrogen atmosphere. The size of pores forming in the solids were controlled by varying different parameters such as pyrolysis temperature , pore forming agent added, carbon particle size and the resin matrix type. The results showed, that the homogenization of the resin/carbon composite pore size after pyrolysis was significantly related to activated carbon grain size. However, Pyrolysis temperature, pore forming agent content , thermosetting resin type were shown also to influence pore size of pyrolyzed material but play no role in pore size homogenization. It is important to mention here that pores size of carbonaceous material synthesized from epoxy resin is smaller than that synthesized from phenolic resin for the same particle size of activated carbon powder. Mechanical tests (3 point bending) and pore size measurements of 0.1 µm support have revealed that the flexural strength and porosity levels of 0.1 um supports based on epoxy resins are higher than their counterparts based on phenolic ones ( flexural strength of 71.62 MPa against 59.12MPa and porosity level of 29% against 21%).
Research into the Preparation and Performance of Hydrotalcite/ MC Nylon 6 by In Situ Intercalation Polymerization
Authors: Huang Bo Fen , Liang Han Xuan , Bai Yan Chao , Wang Jun Jie
Published: March 2013

Hydrotalcite (LDHs) / MC nylon 6 composites were prepared by in- situ intercalation polymerization, followed by morphology and mechanical properties’ characterization of composites. FTIR shows that chemical structure of the molecular chain of the MC nylon 6 is not changed with adding hydrotalcite; SEM reveales that LDHs (2.5, wt-%) has good dispersion and compatibility in the MC nylon 6 matrixes; but when the amount of LDHs is excessive, the composites show obvious phase separation phenomenon. Hydrotalcite can significantly improve the mechanical properties of the composites. When the amount of hydrotalcite reaches 2.5% (wt-%), the composite has best comprehensive mechanical performance. Comparing with untreated MCPA6, the tensile strength and notched Izod impact strength are respectively increased by 68 % and 53 %.
Effect of Composite Pore-Forming Agent on Performance of Light-Weight Thermal Insulation Materials
Authors: Gao Wen Yuan , Qian Chao , Sui Xin Guo , Luo Chun Yuan , Hu Zhi Qiang , Jiang Yan Yan , Liu Jing Xiao , Liu Gui Shan , Hao Hong Shun
Published: March 2013

Production of porous and light-weight thermal insulation materials with reduced thermal conductivity and raised porosity were accomplished using sludge (SL) and sugar filter mud (SFM) as pore-forming agent respectively and composite pore-forming agent (CPFA) at different sintered temperature and holding time. The results of thermal insulation materials with flexural strength 7.65 MPa and thermal conductivity 0.056 W•m-1•K-1, obtained at 1000 °C for 0.5 h show that its the porosity factor raised to 40.60% and the bulk density of the materials decreased down to 1.265 g/cm3 using CPFA, closed porosity and dense structure in sample was observed by SEM
Determination of Formaldehyde Based on the Fading Reaction of Methyl Orange by Reversed Flow Injection Spectrophotometry
Authors: Su Ling , Guo Jia Liang , Liu Zhen , Liu Lu Sheng , Wei Wei
Published: March 2013

A rapid method for determination of formaldehyde in paint and indoor air by flow injection spectrophotometry based on the catalytic effects of formaldehyde on the oxidation reaction of methyl orange by potassium bromate in sulfuric acid medium was established. The relationship of the reduced absorbency to the concentration of formaldehyde was good linearity and the maximum absorption peak located at 508 nm. The affecting factors on the strength of absorption including temperature, acidity, dosage, coexisting ions and so on, and the optimal conditions of the reaction in the system were investigated. Calibration graphs were linear for ranges of 0 to 1.0 mg/L and a detection limit of 1.1×10-8 g/mL formaldehyde was achieved. The proposed method was successfully applied to the analyses of paint and indoor air samples, with relative standard deviation of less than 1.8% and the recoveries are 94.6％ to 106.2％for the determination of formaldehyde.
Effects of Aqueous Extract from Atractylodes macrocephala on the Physical Fatigue
Authors: Wei Ping
Published: March 2013

The purpose of this study was to evaluate the effects of aqueous extract from Atractylodes macrocephala (AME) on the physical fatigue. A total of 48 mice were randomly divided into four groups of 12 mice each: control (C), low-dose AME-treated (LAT), middle-dose AME-treated (MAT) and high-dose AME-treated (HAT) groups. The mice in the treated groups received AME (50, 100 and 200 mg/kg, respectively) intragastrically (ig) and the mice in the control group received distilled water ig. After 30 days, a forced swimming test was performed and the biochemical parameters related to fatigue were examined. The results suggested that AME could extend the swimming time to exhaustion of the mice, as well as increase the liver and muscle glycogen contents, and decrease the blood lactate and blood urea nitrogen levels. These finding indicates that AME had anti-fatigue effects.
Audit Methodology for Environmental Safety in Offshore Systems: An Integrated Approach of Brazilian Regulatory Systems
Authors: Cordeiro Tatiana Barboza Coelho , Morgado Claudia
Published: March 2013

This paper presents a methodology that will provide subsidies for offshore companies to perform an audit of their facilities optimized because it contemplates the current legislation requirements on environmental issues, risk management, quality, process safety, occupational safety and health worker. Along the auditing process, organizations are forced to deal with other concerns, such as man-hours used only for monitoring of audits, infrastructure for carrying out various audits, difficulty in developing, implementing and monitoring of action plans of nonconformities generated from several audits which are submitted throughout the year. A systematic audit optimized integrated will be a fundamental tool for internal management of companies in the offshore segment as to its legal and managerial aspects, which will greatly influence the foundation for decision making, as well as enable the identification of opportunities for improvement in the management of health, safety and environmental (HSE), development and implementation of processes and procedures, allowing a prior diagnosis of their facilities before the existing government audits which occur in facility life .
The Research Status on Environmental Hormone
Authors: Ji Yi Qun
Published: March 2013

Environmental hormone (EH) is a kind of exogenous compound, which has many sorts, sources, approaches, and characters with high stability and difficulty biodegradation. EH exerts its effects on reproductive, nervous, immune, endocrine system, liver, and kidney, it is very harmful to human being’s health, growth and reproduction, which has caused widely attention. The studies of EH are imperative due to a major threat of survival to the animal and human. In this paper, the types of EH disrupters, detriment on animal and human were analyzed systematically, which shown the widely existed EH pollution. The state government departments should pay attention to EH and make further efforts to strengthen the work of the EH pollution prevention and control.
The Seasonal Pollution Characteristics and Potential Ecological Risk Assessment of Heavy Metal in Soil of Northern Suburb Parks in Xi’an
Authors: Wen Li , Liu Li Zhong , Ma Cheng Cheng , Guo Na
Published: March 2013

The seasonal correlation of the same kind of heavy metal and the relationship between different heavy metals’ content were discussed, and the pollution characteristics of heavy metal were assessed by using the potential ecological risk index method. The results show that the content of heavy metals are higher in autumn and winter and lower in spring and summer. The content of Pb only has the significant correlation between autumn and winter at the 0.01 level. It has no significant correlation between the content of Cd, As, Pb and Cr in four seasons. The content of Cr and Pb is significantly correlated in winter at 0.05 level. The potential ecological risk level of Cd belongs to the slight ecological risk in spring and the medium ecological risk in the other seasons. The potential ecological risk level of As, Pb and Cr belong to the slight ecological risk in four seasons.
Antibacterial Susceptibility Patterns and Characterization of Clinical Isolates of Elizabethkingia meningoseptica in Henan Province, China
Authors: Yu Tao , Ying Hao , Wu Zhen Bin
Published: March 2013

This study aimed to provide insight into antimicrobial susceptibility and homology of Elizabethkingia meningoseptica in a hospital environment. Samples from environmental surfaces and the hands of medical staff were screened for E. meningoseptica and antimicrobial susceptibility testing was performed; Pulsed-Field Gel Electrophoresis (PFGE) was employed to subtype E. meningoseptica strains; The resistant genes were detected by PCR. In total, six isolates of E. meningoseptica were collected from 280 samples. Antimicrobial susceptibility testing revealed that all of the six strains displayed multiresistance, showing resistance to more than three different classes of antibiotics. The strains were separated into five different PFGE patterns. The sulII gene was detected in four of the strains. Our data show that multiresistant E. meningoseptica strains exist in the hospital environment and susceptibility testing revealed that vancomycin was the most effective antibiotic. These results have practical significance for treatment of E. meningoseptica infection.
Boilover Starting Time of Small-Scale Crude Oil Tank
Authors: Yang Da Wei , Zhang Pei Hong , Chen Bao Zhi
Published: March 2013

A small-scale crude oil tank boilover experimental device was established to study the basic characteristics of boilover phenomenon. The boilover starting time was mainly focused in order to make the proper fire rescue strategy. The results indicate that, the commonly used methods of predicting the boilover starting time show a relatively great deviation with the results obtained in experiments. The boilover starting time is linearly proportional to the parameter Ho/D0.5, which agrees Tan’s equation. However, Tan’s equation underestimates the boilover starting time when Ho/D0.5≤0.09 and overestimates the boilover starting time when Ho/D0.5>0.09.
A Highly Sensitive Fluorescence Immunoassay for the Determination of Diethylstilbestrol
Authors: Wang Xin Yi , Dong Wen , Xue Wei Li , Wang Shu Hao
Published: March 2013

A highly sensitive direct competitive fluorescence immunoassay (FIA) was developed for the determination of diethylstilbestrol (DES), based on the antibody coating format using biotin-streptavidin amplification system. In the assay, DES competed with biotinylated goat anti-rabbit IgG for the immobilized antibody, then the streptavidin-FITC was added to link to the biotinylated goat anti-rabbit IgG as a tracer. Under optimal conditions, the assay provided a wide analytical range of 0.001-10000 ng/mL with a detection limit of 2.91×10-4ng/mL (R2=0.9943). This method was then applied to the determination of DES in chicken with satisfactory results
Using Stratified Sample and Grid Search to Improve Disease Prediction Accuracy of SVM
Authors: Yao Yu Kai , Cui Hong Mei , Len Ming Wei , Chen Xiao Yun
Published: March 2013

SVM (Support Vector Machine) is a powerful data mining algorithm, and is mainly used to finish classification or regression tasks. In this literature, SVM is used to conduct disease prediction. We focus on integrating with stratified sample and grid search technology to improve the classification accuracy of SVM, thus, we propose an improved algorithm named SGSVM: Stratified sample and Grid search based SVM. To testify the performance of SGSVM, heart-disease data from UCI are used in our experiment, and the results show SGSVM has obvious improvement in classification accuracy, and this is very valuable especially in disease prediction.
Case Study of Investigation and Evaluation on the Urban Light Pollution in Macau
Authors: Liu Jie , Peng Xiao Chun , Zhong Qi Jia , Lin Kui , Feng Hao Lin , Hong Hong Jia , Dong Jia Hua , Fang Qiao Li , Wu Yan Yu
Published: March 2013

This paper conducted investigation and evaluation of light pollution status quo in Macau applying a research method combining qualitative and quantitative analysis. Obtaining general information of city light environment and ensuring main source of light pollution via questionnaire, the research selected different types of city areas and nightscape light source, measured and assessed ambient light and nightscape illuminating brightness degree respectively, referring to relevant domestic and overseas specification and guidelines. The research aims to explore a investigation and evaluation method of city light pollution at night. Its results can provide reference to city light pollution assessment and management.
Recommendations on Promoting the Landscape Architecture Esthetics Research in China
Authors: Long Yan , Jin Rong Ke
Published: March 2013

This article reviews the landscape esthetics research in China in the last thirty years by collecting and listing the domestic journals concerning landscape esthetics and related literature since 1980. It analyzes and surmises the disadvantages and characteristics in the current situation of research on landscape esthetics in China. In order to solve the problems of vague subject in the research of landscape esthetics in China, as well as the complexity and variation in the scale of research objects, the authors propose that the concept of “landscape esthetics” should be renamed to “landscape architecture esthetics” in domestic academic research, recommending the improvement of theoretical research framework on landscape esthetics. Finally, it ends with an attempt to prospect the research on landscape esthetics in China.
Phytoplankton Investigation and Environmental Assessment for Dredged Area in Daqing Estuary Section of Dianchi Lake, China
Authors: Xu Tao , Pan Xue Jun
Published: March 2013

Daqing River is one of the major rivers flowing into the Dianchi Lake. In this paper, phytoplankton investigation and environmental assessment for the dredged area in Daqing Estuary Section of Dianchi lake in Kunming city was reported. After microscopic identification and counting of 6 water samples(two of them is control plot), the water environment were evaluated by the phytoplankton species and quantity which were assessed by the biological diversity index, including Maglarf, Shanon-Wiener, Simpson diversity index, Pielou index and Berger-Parker dominance index. It’s found that there are mainly 5 species of algae, and among them, Microcystis spp. et al., are the dominant species. So the water is assessed as eutrophication, Heavy sewage. Based on the diversity index analysis, the dredged area sampling sites were relatively higher than the non-dredged areas in biodiversity of phytoplankton. Summarily, the water quality after dredging has been improved to some extent. Phytoplankton biodiversity indicators should be the important water environmental assessment method.
Urban Eco-Security Evaluation Method and Model Research on Sichuan Province
Authors: Ding Heng Kang , Wang Jia Yang , Zou Chang Wu , Hu Lei
Published: March 2013

An urban eco-security evaluation system of 18 cities in Sichuan province was established by using PSR (Pressure-Status-Response) method. In this research the parameterized combination operator model which is propitious to fuzzy inversion problem was selected to evaluate over the situation from 2005-2007, using the particle swarm optimization (PSO) to optimize the parameter of parameterized combination operator. The results show that Chengdu was in a relative safe state and the other 17 cities are in critical safe; total situation of eco-security in Sichuan during 2005-2007 keeps on improving. The results gain with our method is basically consistent with the actual situation. It is seen that the urban eco-security indexes and evaluation model in our research are both feasible and efficient to solve the eco-security evaluation.
Water-Quality Assessment of Lv-Tang River in Zhanjiang, China
Authors: Liu Ya Yun , Li Zhi Hong , Liang Xiao Jian , Lin Yan Peng , Wu Rong Hao , Ye Guang Ping
Published: March 2013

Based on the water quality investigation data of December in 2010, the water environment quality of Lv-tang River in Zhanjiang national urban wetland park was assessed using single water quality parameter model and integrated water quality index model. The results show that the water quality of Lv-tang River is worse than the national quality standards for Grade V. The water is polluted seriously. The main pollutants are total nitrogen (TN), ammonia nitrogen (NH3-N) and chemical oxygen demand CODCr with their average concentrations of 60.49 mg/L, 30.57 mg/L and 227.38mg/L, respectively. The averages of their single parameter pollution index are 30.25 , 19.79 and 8.74. The average of single parameter pollution index of the river is 8.23 which indicated that the river belongs to heavy pollution zone. The integrated water quality index was 22.5 showing that the river belongs to serious pollution zone.
Conceptual Ecological Landscape Development Planning of Changchun Automobile Industry Development Zone
Authors: Wu Qiong , Li Hong Qing , Liu Jing Ru , Wu Yu Hong
Published: March 2013

This article studied the ecological landscape development planning in Changchun automobile development zone. The ecological principles of the conceptual planning of the zone was discussed, and conceptual spatial configuration of residence, industries, green spaces and waters was introduced.
Water Quality Assessment and Source Apportionment of Pollution in Shallow Groundwater System of Jiaozuo
Authors: Luo Yun Yun , Ma Zhen Min , Fang Yun Zhi , Hou Yu Song , Li Ling Ling
Published: March 2013

Eight major pollution indicators are selected，which are nitrate, chloride, sulfate, hardness and other indicators through comprehensive monitoring and analysis of shallow groundwater in Jiaozuo area. Fuzzy comprehensive evaluation method is used to determine the water quality level of shallow groundwater. Multiple statistical analysis method is used to take advantage of qualitative and quantitative analysis of pollution sources to identify the main sources of pollution. The results indicate that the shallow groundwater quality is poor and the contaminated area is up to 81.82% in research area. There are three kinds of pollution characteristics of the sources which are the chemical industrial source, mechanical processing source and agricultural source. Their contribution rates to the shallow groundwater pollution of the whole area are 53.81%, 30.34% and 15.85% respectively.
The Application of AAQ171 Water Quality Sensor in Red Tide Buoy
Authors: Zhang Guo Hua , Liu Shi Xuan
Published: March 2013

Equipped with type AAQ171 multi parameter water quality sensor, red tide buoy for on-site rapid monitoring of red tide provide effective technical platform. Seven items such as depth, temperature, conductivity, turbidity, chlorophyll, DO and pH are mounted in AAQ171. Performance index and usage in the red tide buoy of each item were introduced. Water quality data can serve for the marine environmental protection and marine resource exploitation.
Electrochemical Evaluation Method for Soil Corrosion Properties in Grid Substation
Authors: Pei Feng , Fu Jing , Wu Fa Yuan , Wang Lei Jing , Liu Xiao Lei , Yin Zhao Hui , Zhu Zhi Ping
Published: March 2013

Soil corrosion is the main reason of corrosion failure for substation grounding grids. To explore electrochemical evaluation method for soil corrosion of substation grounding grids would effectively ensure the safe operation of power grids. This paper discussed the main several kinds of soil corrosive electrochemical research methods and application. These methods played an important role on researching soil corrosion mechanism, soil corrosivity and corrosion behavior.
Nitrite Stress on Density of Hemocyte and Phenoloxidase Activity in Hemolymph of Charybdis japonica
Authors: Xu Xing Hong , Zhou Li , Liu Yan Qing , Yan Bin Lun
Published: March 2013

In order to discuss the effects of nitrite on the density of hemocyte (DHC) and phenoloxidase (PO) activity in hemolymph of Charybdis japonica, the crabs were exposed to six nitrite-N groups (0, 2.0, 4.0, 6.0, 8.0 and 10.0 mg L-1 ambient nitrite-N concentrations). The DHC and PO activity was examined on days 1, 3, 5, 10 and 15 following the stress. Results showed that the two indexes appeared to have a decline trend after an initial ascent. After 1 day treatment, the DHC of five treatments were higher than that of the control group respectively, while the PO activity of 8.0 and 10.0 mg L-1 nitrite-N exposed group decreased compared with control. With time elapsed, the DHC of lower concentration nitrite-N exposed group increased faster, while the PO activity of higher concentration nitrite-N exposed group rised faster than other treatments. After 15-day stress, all parameters tested were lower than those of control group barring the DHC of 2.0 and 4.0 mg L-1 nitrite-N exposed group and the PO activity of 2.0, 4.0, and 6.0 mg L-1 nitrite-N exposed group.
Research on Ecological Compensation of Urban Green Space：A Case Study on Jinan City
Authors: Lu Min , Wang Fei , Li Dong He , Yang Pan Pan , Li Ke Ke , Qin Bi Lian , Kong Ya Fei
Published: March 2013

Study on ecological compensation ability of urban green space is the premise and foundation of scientific and reasonable urban ecological green space system planning. Taking Jinan as an example, the paper studies the ecological compensation ability of ecological green space system by applying RS and GIS technology, based on the principle of balance of carbon and oxygen and by using the green equivalent method. The results show: except Lixia District’s per-capita two-dimensional green biomass does not reach minimal standard(25m2 per person), the other four districts (Licheng, Tianqiao, Huaiyin and Shizhong) reach the underline of green equivalent which meets the needs of the normal life of residents. However, there exist some problems, such as scarcity of green space types and disproportion of ratio between trees and shrubs.
Analysis on Mercury Emission and Control Technology of Typical Industries in China
Authors: Yue Tao , Wang Fan , Han Bin Jie , Zuo Peng Lai , Zhang Fan
Published: March 2013

The mercury emission characteristics of coal-fired power plant boilers, industrial boilers, cement kilns, and sintering of iron and steel industry were studied in this paper. The reducing effect of mercury emissions by pollution control technology was analyzed. The EPA standard method was used to measure the mercury concentration of the pollution sources. For coal-fired boilers, the mercury removal efficiency of the existing electrostatic precipitator and wet FGD is up to 60%-70%, and the mercury concentration in the flue gas is below the standard 30μg/Nm3. The main mercury emissions of cement industries are at the kiln outlet, the mercury concentration of which is 2.5 to 5.4 times that of the kiln inlet. For the iron and steel industry, the mercury concentration of the exhausting gas after dust removal and desulfurization can not meet the emission limits and need to be further controlled. The research did in the paper made a scientific basis for the improvement of atmospheric mercury emission inventory and the mercury control.
Numerical Simulation Study on Nitrogen Oxides Emissions of Power Plant
Authors: Guo Yue Feng , Bu Yong Dong , He Fu Long , Qi Wei , Jin Yi
Published: March 2013

Modeling and optimization of NOx emissions is an important task of boiler combustion optimization. Nonlinear modeling techniques with adaptive mechanisms and the genetic algorithm for optimization are all used widely. The purpose of this study is to achieve successful application of modeling and optimization for NOx emissions of fossil-fired boilers. In this paper the adaptive modeling techniques and genetic algorithm will be integrated and applied on the NOx emission data of two different utility boiler units.
Analysis of Nutrient Pollution in the Tuo River of Suzhou
Authors: Fu Jin Mu , Tao Ye Qing , Li Qi , Chen Xiao Yin , Fang Gang
Published: March 2013

Based on continuous observation data of two cross-sections among 2007-2010 in Tuo River of Suzhou, investigated the distribution characteristics of TN、TP and NH4+-N pollution. The result shows that TN、TP and NH4+-N variation between 0.1-14.39 mg/L、0.029-0.89 mg / L and 0.011-5.72mg / L. Beside, the investigation appeared that annual average change is in the state of upward trend; seasonal changes is significant, but has no notable regularity. Related analysis shows that the water temperature correlated weakly with the water volume、TN、TP and NH4+-N. Conclusions indicate that human activities in the region of Tuo River influence TN、TP and NH4+-N pollution situation and point source pollution is a major influence factor.
Design and Implementation of Mobile Monitoring System for Environmental Monitoring
Authors: Shao Zhen Feng , Jing Cheng , Chen Jia , Ding Lin , Zhang Lei , Wu Can
Published: March 2013

Environmental monitoring is increasingly playing a significant role in such aspects as environment protection, emergency disaster response and rescue, and macro decision-making etc. However, the intrinsic characteristics of complexity and spatial-temporal diversity, multi-scale features and heterogeneity brought from various means of data acquisition make the integration of multi-source data with high-efficiency becomes an international challenge nowadays. In this paper, the design and implementation of a vehicle-borne platform based on Internet of Things for environmental monitoring has been achieved. And then, by merging and matching environmental data and spatial data, more intensive multi-source environmental parameters and information can be obtained to act as meaningful supplementation of fixed environment monitoring stations. The research of this paper is conductive to the transition of environment monitoring from static methods to dynamic methods and from data-based empirical model to sensor network-based quantitative model. As a result, current environment monitoring will become more timely, dynamic, integrated and intelligent.
3D-QSAR Study on Acute Toxicity of Halogenated Phenol to Green Fluorescent Protein Using CoMFA and CoMSIA
Authors: Liu Hong Xia , Zhao Guo Hua
Published: March 2013

3D-QSAR studies of halogenated phenols screening for acute toxicity were performed by comparative molecular ﬁeld analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) methods. Groups’ data has been modeled to obtain an average estimate and a predictive value for ranking and screening purposes. CoMFA and CoMSIA models have given cross-validation regression coefficient (q2) values of more than 0.80 and correlation coefficient (R2) value of more than 0. 96, which validated for their prediction, could be applied to predict unavailable data.
Status and Trend of Water Transfer Project Research in China Based on Factor Analysis and Social Network Analysis
Authors: Xie Yu Feng
Published: March 2013

This paper used China National Knowledge Infrastructure database (CNKI) to analyze the keywords of water transfer project related papers in core journals from 1992 to 2011. Using Ucinet and SPSS software to make factor analysis and social network analysis, the paper discussed the status and frontier of water transfer research. Results are found that the allocation of water resources, water environment impact are the core, and that the tendency of ecological and the institutionalization including the ecological water requirement, ecological compensation, carrying capacity, water safety, water rights , system and so on are much obvious.
Application of Modified Ecological Footprint Model: A Case Study of Tibet, China
Authors: Cui Guan Nan , Wang Xuan
Published: March 2013

To improve the ecological footprint model in aspect of reflecting sustainability of the economic, social and technological, the emergy analysis and socio-economic system development index were introduced into the model. The modified ecological footprint model was applied in the calculation of ecological carrying capacity and ecological footprint in Tibet, China. The ecological carrying capacity/cap is 19.13hm2, and the ecological footprint/cap is 8.96hm2. The result shows that the Tibet region is under the condition of ecological surplus and it is suitable for further programs development to some extent. But the high proportion of energy resources, cement and fertilizer utility should draw attention during the exploitation or construction progress.
Research on the Embedded Network Streaming Media Technology
Authors: Zhang Jin Hai
Published: March 2013

With the development of the information industry, awareness of information resources has gradually transition from text and images to audio and video, and an increased emphasis on getting real-time and interactive resources. Streaming media with start delay is small, does not take the client's local storage space advantages, gradually became the preferred. Streaming media applications based on IP networks continuous development on a global scale.
The Technology of Biological Nutrient Removal in SBR and the Modifications of the System
Authors: Mao Jia , Zhao Li Jia , Yu Hao , Lin Xiao Dong
Published: March 2013

Activated sludge, the most common process for treatment of wastewater, has been widely applied in the treatment of domestic sewage, municipal sewage and organic industrial wastewater. Currently, as a number of modifications and refinements have been utilized to improve conventional activated sludge treatment, the process now could be used as a tertiary treatment technique capable of removing both nitrogen- and phosphor-containing compounds in wastewater. Sequencing batch reactor (also known as SBR) method is a novel, revolutionary and promising technique in the field of activated sludge treatment. The automatic control system of SBR employs time as the critical controlling parameter, and thus ensuring a steady and consistent operation for the process. With the increasing applications of computer technology and the automatic (continuous) monitoring devices, the SBR-based process becomes the new spotlight in the industry, while the efforts put into the studies in this field have produced numerous fruitful outcomes.
Proton Transfer Reaction - Mass Spectrometry Determination of the Emission Rate of Flavor Ingredients in Toothpastes
Authors: Zhang Ge , Gao Sheng Nan , Wei Wen Ding , Xu Qiu Jian
Published: March 2013

Under the experimental conditions, the headspace concentration of two flavor ingredients in toothpastes, limonene (C10H16) and menthone (C10H18O), was measured with proton transfer reaction - mass spectrometry (PTR-MS). Combined with the theoretical diffusion model and analytical solution, the partition coefficient and the emission rate of the two ingredients from toothpaste diluent to the circulated air were calculated. Theoretical Solutions of the distribution coefficients were obtained respectively as 0.00432 and 0.00418 for C10H16 and C10H18O. The corresponding simulated flavor concentration in headspace air Ca(t) had good agreement with the experimental values (R2 = 0.983 and 0.958 respectively). The exponential decay rate formulas for the two flavors were obtained from experimental data and the solution of the theoretical model.
The Research of Thermal Error Compensation Technology for Turning Center Based on Grey System theory
Authors: Sun Han Ying , Qiao Xiu Chun , Yang Jian Guo
Published: March 2013

Based on grey system theory correlation analysis methods, to turning center as an example, the study for the thermal error, the detection of the temperature field, thermal point of error detection and real-time compensation technology optimized, key points of temperature on the machine location was carried out. The most key points of temperature sensors are optimized. A thermal error compensation system was set up, and real-time compensation for the processing of authentication. At this stage the results show that the compensation results are obvious.
Research on Performance Simulation of Recoil Mechanism Based on Computational Fluid Dynamics
Authors: Sun Ye Zun , Qin Jun Qi , Di Chang Chun , Cui Kai Bo , Yang Yu Liang
Published: March 2013

It takes much less than the model test and can give a detailed description of the internal details of the internal flow field of recoil mechanism that use computational fluid dynamics theory and numerical simulation do research. It has the advantages of low cost, accurate calculation, high efficiency, easy to implement and so on. This article provides a brief introduction to the current situation and development outlook of the simulation study of the recoil mechanism using of computational fluid dynamics.
Research on Mathematical Modeling of Ship Simulation System
Authors: Li Yong Xiang , Zhang Jin Hai
Published: March 2013

With the rapid development of science and technology, mathematical models more and more present in modern production, work and social activities. Must be established to control the production process of mathematical models, use this model on design and calculation of control devices accordingly in order to achieve effective process control. Ship handling Simulator as an advanced teaching method applied in the teaching and training of crews sailing in China have a long history. By driving simulation of ship navigation, training students to train and ship very similar environment.
The Temperature Control System Research of PVC Latex Batching Based on PLC
Authors: Meng Hua , Li Ming Yu , Zhu Jie , Zhang Yan Ju
Published: March 2013

The PVC latex batching system has problem of the long time lag and nonlinearity and the precise mathematic mode that is hard to build. Advanced control strategies show strong advantages for resolving these problems, thus the combination of the advanced control strategies with the popular PLC has been the hot area in controlling-industry. In this paper, it proposed to apply the fuzzy control to the Batching system and has completed the design of the fuzzy controller. Based on the characteristics of the PLC, the realization of fuzzy control on PLC and the design method of the fuzzy controller in Siemens S7-300 PLC have been put forward.
Free Torsional Vibration Characteristics of a Closed-Form Planetary Gear Set
Authors: Huang Qi Lin , Wang Yong , Huo Zhi Pu , Wang Jun Gang , Sheng Ruo Yu
Published: March 2013

A purely torsional dynamic model of closed-form planetary gear set is developed to investigate its natural frequency and free vibration modes. The closed-form planetary gear set considered consists of two-stage planetary gear connected by high-speed carrier and ring gear. Three identical planet gears are equally spaced in each stage. Based on the precondition, the natural modes are classified into three types of vibration modes: overall modes，high-speed planet mode and low-speed planet mode
The Fatigue Simulation Analysis of Customized Implanted Titanium Plate for Human Mandible Bone Reconstruction
Authors: Wu Wen Zheng , Zhang Lei , Zhao Ji , Qu Xing Tian , Zhao Di , Zhang Yu , Wang Wan Shan
Published: March 2013

Aiming at the implanted mandible titanium plate in chewing movement under the action of repeated load is prone to fracture, leading to problems such as secondary surgery. This study makes fatigue simulation analysis for customized implanted titanium plate of fatigue damage. It also analyzes the minimum service life position and low service life area on different loading. Simulation analysis of deformation is done. The analysis contains the deformation area and the maximum deformation degree with a variety of bite condition. This study also analyzes and forecasts the fatigue failure area, which provides basis for preventing fatigue failure for implanted titanium plate. It has important significance to improve titanium plate service life and strength. It also could alleviate patients’ sufferings.
Research on Low Voltage Ride-Through Technique in DD-PMSG Wind Power Generator System
Authors: Li Yin Xing , Liu Peng Hui , Zhang Jun Li
Published: March 2013

In order to achieve the power grid voltage default ride-through, the permanent magnet direct-drive type wind power generator system is employed. The Crowbar resistance and the STATCOM operation mode are two effective methods to control the DC capacitor voltage not to rise and to help the power grid voltage restoration. The power grid voltage default is little and the STATCOM operation mode is applied. The Crowbar resistance is invested to the wind power generator system when the voltage default is large. The methods introduced in this paper are applied in other variable speed fixed frequency wind power generator system.