bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluation of ESD/LU Reliabilities by Different SCR Layout Types in a 0.35μm 3.3V CMOS Process
Authors: Chen Shen Li , Lin Chun Ju
Published: September 2013

This paper aimed at the evaluation of layout dependence on ESD/LU reliabilities in the 0.35μm 3.3V low-voltage triggered silicon-controlled-rectifier (LVTSCR) DUTs. In this work, the parameter of channel L in a pMOS and the parameter S of an SCR are varied to study the influence on trigger voltage (Vt1), holding voltage (Vh) and secondary breakdown current (It2), respectively. Eventually, it can be found that the layout illustration of type-2 has a higher It2than that of type-1, i.e., the ratio of (It2)type-2/(It2)type-1> 3 among all the LVTpSCRs. Meanwhile, the holding voltage of all SCR devices are latch-up free while operated at 3.3V. Therefore, the type-2 layouts of SCR devices are so excellent structure in the ESD/LU reliability considerations for this 0.35μm 3.3V CMOS process.
Structure Characteristics and Improvement of Oil Seal of Turbo-Supercharger
Authors: Gan Hui , Yang Kun Yu
Published: September 2013

Through the analysis of the sealing mechanism of the oil seals in exhaust gas turbo supercharger and the comparative test of different oil seals with the pressure change in the oil-return chamber, a seal that uses a caulking ring with reverse threads is designed, and an optimum combination of oil seal is selected. The combination of caulking ring and the oil-return thread structure has better complementary action on oil sealing, because for the seal with oil-return reverse thread there is better dynamic and static seal effect on ring seal and has good sealing performance and high reliability at high speed. The test results of screening selection of combination seals show that different combinations of caulking ring and the oil-return threads have great influence on the pressure of the oil-return chamber. The combination of caulking ring outside and oil-return threads inside is recommended to be used. In addition, the smooth return of the oil can be ensured as far as possible by increasing the supercharger oil-return chamber volume. The improved structure of the oil seal has effectively enhanced the reliability of the whole unit of the exhaust gas turbo supercharger.
Waterway Regulation Effect of the Letianxi Reach between the Three Gorges Project and Gezhouba Project
Authors: Pi Li , Feng Xiao Xiang , Zhang Ri Hong
Published: September 2013

t is the first implementing waterway navigation project between the Three Gorges Project (TGP) and The Gezhouba Project. Based on analyzing of the navigation-obstructing characteristics, waterway regulation ideas and schemes are put forward. A three-dimensional flow mathematical model is used to simulate the change of water level, flow velocity, flow pattern. And the effect of the regulation project is analyzed and contrasted with and without it. At last, the reasonable regulation scheme is proposed.
Shrinkage Performance of Lime-Fly Ash Stabilized Crushed Stone
Authors: Ma Xiao Qian , Xue Xue , Cheng Xian Peng
Published: September 2013

In order to study the effect of several factors on the shrinkage performance of lime-fly ash stabilized crushed stone, temperature shrinkage coefficients and dry shrinkage coefficients of mixtures with different gradations, lime and fly content and age were measured. Results indicate that mixture with a stone-on-stone contact has better shrinkage-resistance performance; For the same gradation, both dry shrinkage coefficient and temperature coefficient become improved with lime-fly content increasing; when the lime-fly content is the same, temperature shrinkage coefficient increases with longer age; Results of analysis of variance show that to the temperature shrinkage coefficient, the effect of age and lime and fly content are important, and the latter is greater. To the dry shrinkage coefficient, gradation and lime and fly content are important factors, and the former is greater.
Research on the Characteristics of Steel Frame Node under Explosive and Impact Load
Authors: Xie Zhi Ying , Tan Ji Ke , Yang Hui , Pan Jin Yu
Published: September 2013

With the characteristics of huge energy,short acting time and large destructiveness, Explosive and Impact Load leads a large punching force towards construction units. Once happened, it can cause serious of damaging effects. Therefore,the explosion protection performance of construction is being more and more concerned[1].The large finite element analysis software ABAQUS is being used to deal with numerical simulation of cross steel frame node, to analyses the response of the steel frame node and to discusses different steel material parameters on the influence of the nodes dynamic response under the effect of Explosive and Impact Load in this paper. According to conclusions, increase strength and modulus of elasticity of steel can reduce the damage of Explosive and Impact Load to construction. Meanwhile taking advantage of the function of transferring information between explicit processor and standard processor in ABAQUS, this paper analyses the effect of Explosive and Impact Load on steel frame node under low cyclic loading and concludes that it is harmful to the structural performance that the effect of Explosive and Impact Load can lower the ductility of the structure. According to the conclusion from the research on steel frame nodes characteristics under the effect of Explosive and Impact Load, this paper present that negative influence of Explosive and Impact Load should be taken fully into account, beneficial materials to explosion protection performance should be choosen and the corresponding measures to improve the ductility of structure should be taken to reduce structures degree of damage under Explosive and Impact Load in future structural design. All the research have a certain significance to the future structural design of explosion protection.
Time-Space Diagram Analysis of Urged Acceleration CA Model
Authors: Kang Rui , Huang Chen Yu , Yang Kai
Published: September 2013

Based on the SDNS cellular automaton (CA) traffic model, an improved single lane traffic CA model with considering the urged acceleration and safe deceleration was proposed. The model not only simulated the interaction between vehicles, but also reproduced nonlinear phenomena which tallies with real traffic such as the synchronism flow and the metastable state. The time-space diagram of new model shows a gray synchronous band zone rather than that black blocking band zone. The range of synchronization is smaller when ps is bigger, urging has less function, congestion area is wider. Comparing with SDNS model, with the proposed model in this paper, when emerging congestion, the combined action of urging and safe deceleration enabled system self-adjustment so that efficiently mitigated congestion.
Fault Analysis of Switching Regulator Induced by the Diode Turn-On Time
Authors: Wang Zheng De
Published: September 2013

Recently, switching regulator clock rate and transition time have become faster, making diode turn-on time a critical issue. A potential difficulty due to diode turn-on time is that the resultant transitory overshoot voltage across the diode, even when restricted to nanoseconds, can induce overvoltage stress, causing switching regulator IC failure. This paper provides a testing methology enabling proper diode selection for switching regulators.
Acid Volatile Sulfide (AVS) and Simultaneously Extracted Metals (SEM) in Surface Sediments of Chaohu Lake, Anhui Province, China
Authors: Chen Shu Qin , Zhang Lei , Chu Zhao Sheng , Hu She Rong
Published: September 2013

At present there are few studies on the AVS and SEM in sediments of Chaohu Lake. Most of the previous studies on heavy metals based on the one time, the short-time or a local-scale survey. In this paper, [AVS] and [SEM] in Chaohu Lake surface sediments were studied for different seasons in 2007, 2008 and 2009. The results showed that: (a) The three-year average of [AV and [ΣSE in surface sediments of Chaohu Lake is 4.2μmolg-1and 2.31μmolg-1, respectively. The maximum of [AV appears on spot 5 (14.845μmolg-1) in summer while the minimum appears on spot 9 (0.13μmolg-1) in winter. (b) In spot 5 which near the estuary of Yuxi River, three-year average of [SE was the maximum (5.81μmolg-1), and the minimum of [ΣSE (0.07μmolg-1) appears on spot 8 which locates in the middle of Chaohu Lake. In spot 13 the [ΣSEM]-[AVS]=3.2>2 and [ΣSEM]/[AVS]=4.45>2.34 indicate that heavy metal contaminants from Hefei city have threatened the biosafety of Chaohu Lake. (c) The spatial autocorrelation of SEMCdis weak, which indicates that spatial distribution of SEMCdis determined by anthropogenic factors rather than sediments' own attribute. Chaohu Lake has been heavily polluted by Cd from no-point source and electronic electroplating industry.
Analysis of Phytoplankton and Eutrophication in Xinlicheng Reservoir
Authors: Xiao Chang Lai , Li Yong Qing , Zhao Lin Lin , Liang Xiu Juan , Shang Dian Jun
Published: September 2013

According to the analysis results of phytoplankton collected after July 2007, the dominant population is chlorella or cyclotella, and cell density of phytoplankton and content of chlorophyll-a are different as seasonal change. In 2007, reservoir water is classified as light eutrophic. Later degree of eutrophication declines and water quality become better. The occurence of eutrophication is promoted by something including much of nitrogen and phosphorus from upstream water, suitable temperature and illumination. Controlling nitrogen and phosphorus sources and strengthening artificially biologic chain are adopted to prevent eutrophication. Obvious effect has being achieved in recent years.
Molecular Weight Distribution of DOC in Effluent of Petrochemical Wastewater Treatment Units
Authors: Liu Miao Ru , Xi Hong Bo , Zhou Yue Xi , Chen Xue Min , Song Guang Qing , Yue Yan , Zhou Jing Ling
Published: September 2013

The results showed that DOC, UV254 and SUVA all presented a characteristic that organics was mainly concentrated on molecular weight <1kDa.Except organics with molecular weight <1kDa, the molecular weight of organics in Influent and effluent of Hydrolytic Acidification respectively distributed in the range of <1kDa, 30~100kDa and 1~3kDa, 10~30kDa. Organics in effluent of Anaerobic, Aerobic, Secondary sedimentation tank and Contact oxidation occupied proportions in all ranges of molecular weight distribution but relatively lower.
The Influence of Organic Loading Rates on Hydrolysis and Acidification Rates of Fruit and Vegetable Waste Anaerobic Fermentation
Authors: Han Dan , Zheng Ming Yue , Zheng Ming Xia , Wang Qun Hui , Wang Kai Jun
Published: September 2013

Continuous flow anaerobic fermentation experiments of fruit and vegetable waste were carried out in four laboratory-scale anaerobic acidification reactors with pH controlling system. The organic loading rate (OLR) were 13, 20, 30 kg COD/m3 d gradually and a hydraulic retention time (HRT) of 3 days were constantly. The results, obtained from the three stages operation, showed that hydrolysis rate increased along with the rising of OLR, to the highest of 79.3%, and acidification rate decreased on the contrary, showing that the activity of acidification bacteria was inhibited by high OLR. High pH value contributed to the process of hydrolysis and acidification especially under high OLR in the acidogenic phase of the fruit and vegetable waste.
Temporal Variation and Meteorological Dependence of Polychlorinated Biphenyls in Atmospheric PM10 of Jinan, China
Authors: Luo Jie , Cui Zhao Jie , Du Shi Yong , Fan Guo Lan
Published: September 2013

s. To explore the PCB pollution characteristics in the airborne particulate matter, seven indicative polychlorinated biphenyls (PCBs) in atmospheric PM10 were determined weekly in Jinan, China. PCB concentrations, profiles, temporal distribution pattern and the correlations between Σ7PCBs and the meteorological conditions were analyzed, aiming to quantify the pollution level of PCBs in urban air. All the samplers were extracted by accelerated solvent extraction (ASE) and analyzed by gas chromatography (GC). The monthly concentrations of Σ7PCBs were 81.4-2335.2 fg/m3. A distinct seasonal variation of PM10-associated PCBs exhibited. Higher concentrations of PCBs in cold weather than warm weather was found. PCB28 and PCB52 were the major components of PM10-associated PCBs in cold weather, while PCB 118 and PCB 180 dominated in warm weather. The fresh emission sources in cold weather, such as the burning of coal for domestic heating, were suggested to be a major influence factor. A significant correlation (p<0.05) was found between the total PCB congeners and atmospheric pressure. Heavy rainfall can also impact PM10-PCBs significantly. The weak correlation coefficient between atmospheric PCBs and wind speed suggested that the inefficient dispersion and no significant pollution sources around.
Study on Fracture Behavior of Steel Strip under Cold Rolling Forming Process Based on GTN Damage Model
Authors: Chen Jian Jun , Yan Yu Xi , Sun Quan , Pan Hong Liang
Published: September 2013

In this paper the behavior of crack propagation of the strip steel is investigated by using the Gurson-Tvergaard-Needleman (GTN) damage model. The damage parameters used in the damage model are determined by tension experiments and SEM observation. With the aid of finite element method the influences of rolling ruduction and tension on crack propagation are systematically analyzed. The numerical results show that the GTN damage model is available to prediction the initiation and propagation of edge cracks during rolling forming process and the simulation results agrees well with the experimental results.
Research and Application of Similarity Criterion in Advance Water Flooding in Low Permeability Reservoir
Authors: He Jin Gang
Published: September 2013

This paper study on the oil/water phase porous flow process of advance water injection in low permeability reservoirs through the similarity theory. Get oil/water phase porous flow control equation of dimensionless equation through equation analysis method. Solve the dimensionless governing equations with the method of implicit and explicit solution of saturation method (IMPES). Results show that the bigger similarity criterion of sensitive factors, the bigger influence on test results; In the sensitive factors, which π10, π3, π8, π5 as the main similarity criterion. Considering above similar criterion to determine the reasonable indoor experiment of model parameters, which can mobile oil saturation, irreducible water saturation, water phase permeability, relative position well, hole diameter and reservoir thickness affect indoor advanced water flooding experiment of low permeability oil reservoirs recovery degree of the key technical parameters. Key word: Similarity criterion; Low permeability; Physical simulation; Tablet models
The Application of BIM in Updating the Thermal Environment Design of Traditional Residences in Mountain Region - A Case of Chongqing
Authors: Wang Jing Yang , Sun Xin , Zeng Xu Dong
Published: September 2013

As an important type of folk houses with the historical and cultural value in China, the mountainous residence is occupying an important historical position in the rapid urbanization. Whereas, traditional dwellings in Chongqing are in an "overload" condition and poorly indoor comfort. With the help of BIM technology, we can simulation analysis of the ambient temperature, the age of air, wind speed and wind pressure, soughting to a method of quantitative analysis of mountain traditional houses, and the design of ecological energy-saving.
Hydraulic Loading on Test of Nitrogen and Phosphorus Removal from Rural Sewage by Subsurface Constructed Wetlands-Ponds Composite System
Authors: Li Li , Wang Quan Jin
Published: September 2013

Based on the main factor of hydraulic loading, removal of nitrogen and phosphorus and effluent quality of rural domestic wastewater were studied in subsurface constructed wetlands-ponds system in Jiangxi Province. The results showed that there had good processing results on nitrogen and phosphorusremoval by subsurface constructed wetlands-ponds system,especially on removal of phosphorus.In the combined system removal influence of nitrogen and phosphorus were affected by hydraulic loading,it was influenced more significantly for nitrogen removal and had less influence on removal effect of phosphorus relatively.When the hydraulic loading was 72 m3·m-2·d-1, removal rate of TNNH3-NTP were 75.3%76.08%86.77% respectively,which was very good for the combined system;removal rate of TNNH3-NTP were 42.67%33.62%61.72% in the subsurface constructed wetlands; removal rate of TNNH3-NTP were 32.63%42.46%25.05% in the ponds.While hydraulic loading was lower,the subsurface constructed wetlands was the control factor for the combined system.With the increasing of hydraulic loading,the ponds was the control factor gradually. In the combined system, effluent quality of TN was superior to the first class B criteria specified in GB 18918-2002(15mg·L-1),effluent quality of NH3-N was superior to the first class B criteria (8mg·L-1), effluent quality of TP was superior to the case-Vwaters of surface water quality (GB3838-2002) standard (0.4 mg·L-1) .Research results could be the basis of combined system in Jiangxi Province.
Potassium Permanganate and Chlorine Reactions with Natural Organic Compounds in Algerian Surface Water
Authors: Achour Samia , Guergazi Saadia
Published: September 2013

The aim of this work is to study effect of two powerful oxidants (potassium permanganate and chlorine) on natural organic matter in surface waters. Trials are conducted out with three Algerian surface waters under controlled experimental conditions (oxidant dose applied and contact time). Permanganate was used alone in the first step, while the combination permanganate-chlorine was used in the second step.As for chlorine demand, permanganate consumption seems correlated with physicochemical characteristics of waters and particularly the nature and content of organic matter. The effect of a coupling preoxidation by permanganate / post-chlorination resulted in a decrease of chlorine consumption and amounts of produced trihalomethanes.
Effects of Gangue on Pyrolysis of Municipal Solid Waste
Authors: Jia Jin Wei , Shu Xin Qian , Hui He Long , Fu Xing Min , Liu Shu Cheng , Gong Jian , Liu Lu , Li Shi Da
Published: September 2013

To investigate the effects of gangue on pyrolysis of municipal solid waste (MSW), pyrolysis of MSW with gangue has been conducted by TG and fixed-bed reactor, respectively. The effect of gangue on pyrolysis product yields and compositions of gaseous products was investigated and the obtained results were compared with similar experiments without gangue. It was shown that gangue can improve the pyrolytic reaction of MSW, reduce the char yield, increase the liquid yield. And influences of gangue on yields of H2, CO, CH4 and CO2 were more apparent, the yields of H2, CO and CO2 with gangue were improved 12.5%, 11.8% and 175%, respectively, conversely, the yield of CH4 was reduced 15.4% compared with no gangue.
Study on the Low Carbon City of Guangzhou by Energy Model
Authors: Wang Peng , Cheng Bei Bei , Zhao Dai Qing
Published: September 2013

As city accounts for more than half of the world population and consumed 75% of the energy, it emitted around 70% of the global GHGs. So it is essential to consider low carbon development at urban level from a long term perspective. This study aims to how to account the current carbon emission and predict future emission at city level by use of Energy model. The model projects consistent and quantitative socio-economic variables, energy demand, GHG emission and diffusion of mitigation options in order to achieve an emission target or assess the potential of emission reduction by various counter measures. The analysis results could be recommended to the policy makers.
Research and Application of Real-Time Remote Monitoring and Early Warning System of Source Water Quality
Authors: Li Shu Yuan , Tao Jian Hua , Yu Lei
Published: September 2013

Drinking water sources play an important role in assurance of life safety, normal production and social stability. In this paper, a real-time remote water quality monitoring and early warning system has been developed. The paper concentrates on the system architecture and key techniques of the real-time water quality monitoring and early warning. The implementation of the system by advanced water quality sensor techniques, wireless transmission, databases and water quality modeling is retraced in detail. It can be applied to the real-time remote monitoring of water quality and decision support for water pollution incidents.
Research of Compound Fuzzy Controller in Temperature of Air-Conditioning Room
Authors: Geng Shi Bin , Lin Yu
Published: September 2013

Combined with characteristics of large time delay, nonlinear, time-varying on air-conditioned room temperature control, designing a proportion-fuzzy PID controller, establishing air-conditioning temperature system model, introducing controller principle and structure, describing various parameters of the fuzzy control rules in detail. The system model was built and compared with the traditional PID in Simulink of MATLAB, and finally making simulation. Simulation results show that the proportion-fuzzy controller has better dynamic and steady performance than conventional PID controller.
The Individual WTA Changing Analysis for Eco-Compensation Construction in Water Source Conservation Area
Authors: Yu Bing , Xu Lin Yu
Published: September 2013

Ecological compensation uses economic incentive to address water conservation issues. Stakeholders preference should be considered seriously during the eco-compensation policy making. To that end, the contingent valuation method (CVM) has been widely preferred for its non-market valuation in the process of eco-compensation standard confirmation. In this paper, the research was focused on the changing of individual willingness to accept eco-compensation over years using CVM. With the case study of Miyun Reservoir, China, the changes of residents WTA and key socioeconomic variables were gauged respectively according to two-period investigation in 2008 and 2012. The results showed that the average value of Miyun Reservoir residents WTA was decreasing, and the job and attitude to environment of respondents became the significant predictors of WTA to water conservation during the past 5 years.
Sand Mining Monitoring andAnalysis of the Yangtze River Based on Multi-Beam Bathymetry
Authors: Han Xian Quan , Xing Cheng , Tan Yong
Published: September 2013

Multi-beam bathymetry is a modern underwater detection technology which has been widely used in the fields of underwater detection.We present the working principle and characteristics of this method and introduce its application to the monitoring of river sand and gravel resources.We also discuss its techniques and data processing process. Through case study in a sand mining segment in the Yangtze River basin,we demonstrate the effectiveness and reliability of applying this method to the quantitative.
Groundwater Vulnerability Fuzzy Evaluation in Qujing Basin
Authors: Zhang Xiao Ling , Li Feng , Liu Hong Zhan
Published: September 2013

As the Qujing citys industrial development, how to use and protect groundwater is the primary problem of urban development because of the non-uniformity distribution of groundwater. This paper establishes a two-story DRASTIC fuzzy evaluation model using analytical hierarchy process, by Qujing basin groundwater survey and data analysis. The model was applied to evaluate the groundwater vulnerability of Qujing basin and the east and west sides of the mountain with the consideration of depth to the water table, net recharge, aquifer material, soil type, topography, impact of vadose zone and hydraulic conductivity of aquifer with the help of monitoring data. The research results show that the Qujing basin is of high vulnerability, we should pay attention to the protection of groundwater environment in the use of groundwater. At the same time show that the model is more sensitivity for evaluating and much simple for calculating. This method is better to reflect the groundwater vulnerability spatial continuity, and further enriched the groundwater vulnerability methods.
Geothermal Geology Characteristic and Origin Analysis of Shilin Basin in Yunnan Province
Authors: Zhang Xiao Ling , Liu Hong Zhan , Chen Kang
Published: September 2013

based on geothermal anomalies and geothermal wells of Shilin basin, the structure of geothermal reservoirs, geothermal geological characteristics and hydrochemistry of thermal groundwater are examined. Geothermal reservoir of the geothermal field is Proterozoic Sinian dolomite and dolomitic limestone. Characteristic of geothermal water runoff and geothermal field are controlled by Jiuxiang fracture and Niutoushan ancient mainland. The drillings data shows that the temperature gradient is 1.5-4.8°C/100m. Deep circulation is the main origin of geothermal water. The chemical type of geothermal water is HCO3-Ca, and high silicic acid content. The geothermal water supply is limited from the hydrogeological conditions; we should control the development and utilization.
Study on Sediment Reduction Effect by Soil Retaining Dam with Different Storage Capacity Allocation Proportion in Dali River Watershed
Authors: Ran Da Chuan , Yao Wen Yi , Li Zhan Bin , Luo Quan Hua
Published: September 2013

Analysis and study were carried out by means of mathematical statistics on sediment reduction effect by soil retaining dam with different storage capacity allocation proportion in Dali river watershed of the Yellow River. The results indicate that, sediment reduction by large, middle and small soil retaining dam account for 80.1%, 14.6%, 5.3% of the total reduction; the sediment reduction benefit has reached its maximum since 1990s, amounting to 30.2%, with corresponding storage allocation proportion of 1.84:2.37:5.79.Dam and reservoir have obvious influence on the correlation between rainfall and sediment in the river watershed, sediment transport is reduced by 10 million ton corresponding to annual average flood season rainfall of 350mm in the watershed. Within the sediment reduction capability of soil retaining dam, the sediment reduction volume increase with more rainfall in the flood season, having the feature of the more incoming sediment is, the more sediment reduction will be.
Derivation and Verification of the Breakage Rate Coefficient during Flocculation Process Based on Shear Strength
Authors: Liu Jian , Zhou Min , Zhou Jian Hao , Hu Qi Chao , He Jun Guo
Published: September 2013

The dynamics of flocculation is always one of the most interesting and difficult points for water treatment. The applicability of existing breakage rate coefficients was restricted due to the limitations of their theoretical derivation. In order to solve this problem, a breakage rate coefficient of flocculation process was derived based on shear strength. It could be described by the equation "s(m)=E0Fr1.2m1/D". Then it was applied to a flocculation model which described the change of particle size distribution during flocculation. Laboratory scale experiments were carried out to verify the feasibility of the new breakage rate coefficient with the typical surface water in northwest China characterized by low temperature and low turbidity. Results indicated that both the change of particle size distribution with time and the effects of operation variables on the stable particle size distribution could be excellently simulated, agreeing well with the experimental results with the relative error ranged from 3% ~ 17%. It was demonstrated that the breakage rate coefficient based on shear strength could be used to describe the breakage rate of flocs during flocculation.
Study on Sudden Cadmium Pollution Emergency Treatment Tests of Drinking Water Source of Cities
Authors: Dong Chuan Qiang , Chen Guan Wen , Wei Wen Yuan , Wu Qiong Fang
Published: September 2013

The experiment is based on cadmium pollution of Long River in Hechi Guangxi. The results shows that under existing process condition of water plants, dosing PAC separately can make removal rate of Cd2+ reach about 60%, only ensuring the inflow water containing maximum 0.01 mg/L Cd2+ reach the standard when outflowed. When the inflow water concentration of Cd2+ surpasses 0.01 mg/L, existing technology is needed to be improved. If using combined treatment with sodium carbonate and PAC, in condition the dosing quantity of sodium carbonate is 1.1 times than the theoretical molar ratio, and PAC is 15 mg/L, the removal rate of Cd2+ reach higher than 90%, making the effluent which Cd2+ exceeds the standard by 10 times reach the standard after treated, providing a new idea for emergency treatment on Cd2+ pollution of drinking water.
Investigation on Present Status of Environmental Quality of Mt. Longhushan Scenic Area and Analysis on Optimization Measures
Authors: Liu Fu Jun , Guo Fu Sheng , Zeng Hua
Published: September 2013

this article has analyzed the quality of water, air and soil in Mt. Longhushan Scenic Area in recent three years. It turns out that although the environmental quality is good and complies with the national standards, various indexes are increasing year by year. And meanwhile, the disordered development has affected the environment, hence, the cultural pollution cannot be neglected. According to the investigation results, the tourism development for scenic area has brought negative effect to the environment. Therefore, we must take the active actions, quicken the pace on completing the management system, make a reasonable plan so as to promote the sustainable development to the scenic area.
Optimized Design of Plant-Mixed Recycled Materials with High Blending Ratio of RAP
Authors: Bian Li , Zhu Bao Lin , Wang Tong , Wei Dao Xin
Published: September 2013

Analyze two problems why blending ratio of plant-mixed RAP generally cannot be more than 40% to 50%. Prove pre-heating and sieving of RAP is a key technology to solve the problems. The test of blending ratio and construction of testing road has proved that applied ratio of RAP in hot recycling plant can be increased to more than 70%.
Evaluation of Human Settlements Environment Suitable for the Nujiang Canyon Based on AHP and GIS
Authors: Li Lu , Xue Xian Gui
Published: September 2013

Establishing the system of evaluation of human settlements environment, and habitat environment evaluation is an important content of human settlements research. Determine the evaluation index of human settlements in Nujiang canyon through AHP. And then it determined the weight of each evaluation index value using Matlab software. The evaluation index obtained the corresponding spatial data of through the GIS spatial analysis technology. Selecting all the residents of Nujiang canyon area as the evaluation object, it established connection between the spatial database and the Excel score table for habitat suitability, obtaining suitable grade of each residential. The results show that, the residential habitat suitability evaluation results and the actual living conditions are broadly consistent with the resident. And the evaluation system is scientific. Research method is effective.
Environmental Problems and Protection Measures on Wastewater Treatment from Hardware Tool Plant in Danzao Town
Authors: Sha Chen Yuan , Chen Guo Xin , Ning Xun An
Published: September 2013

Hardware industry, as a traditional pillar industry in Danzao Town, has brought great economical benefit for local development. However, it brings huge economic increase as well as a series of environmental problems. The characteristics and featured pollutants of the wastewater from hardware tool plant in Danzao Town are summarized in this paper. The current situation and the environmental problems caused by hardware tool plant in Danzao Town are also elaborated. Eventually, some protective measures are given to handle the problems.
The Effect of Trade Liberalization on the Environment: An Empirical Analysis in Zhongshan City
Authors: Ma Li
Published: September 2013

A reduction in trade barriers generally will affect the environment by expanding the scale of economic activity, by altering the composition of economic activity, and by bringing about a change in the techniques of production. This article presents empirical evidence to assess the relative magnitudes of these three effects as they apply to further trade liberalization in Zhongshan city. The author also puts forward some proposals on how to achieve coordinated development of trade and the environment in Zhongshan city.
Analysis of Water Diversion Way and Suitable Discharge Based on Water Environment Improvement Goal in the River Network
Authors: He Wen Xue , Li Cha Qing , Chen Dong Yun
Published: September 2013

One of the direct and effective ways to improve water environment of the river network is water diversion, because of the complex and changing about the river network, the safety of water diversion and the effect to improve water environment have been become the focus of attention. Through the analysis of diversion way and suitable discharge based on water environment improvement goal in the river network, the reasonable interval of the suitable discharge has been defined in the intermittent water diversion and continuous water diversion, the effect to improve the water environment has been further clarified, it is closely related with the water diversion way and discharge, the hydraulic characteristics of river networks should been emphasized to maximum, the self-purification capacity of river networks should be improved, the effectiveness for water diversion to improve the water environment must be continually strengthened.
The Application of Principal Component Analysis in Comprehensive Evaluation of Liaohe River Water Quality
Authors: Zhu Lei , Li Ming
Published: September 2013

In order to explore the relationship between water quality indicators and the cross-section,this paper applied principal component analysis to evaluate comprehensively the water quality monitoring sections of the Liaohe River. The results showed that the water quality of the Liaohe River Tieling and Shenyang segments belonged to the inferior class V water. In this paper, water quality assessment and water environment quality grading used respectively two ways that were not and setting up a virtual cross-section to avoid the classification of water environment quality impacting on the relationship between water quality indicators and quality monitoring sections. Principal component score applied two and three-dimensional graphic display,made expression of the water pollution situation more intuitive.
Correlation between the Avian Community and Habitat Type during the Wintering Period in Zhalong National Nature Reserve, China
Authors: Wu Qing Ming , Ma Jian Zhang , Zou Hong Fei
Published: September 2013

Zhalong National Nature Reserve (Zhalong) is an important habitat of avian, especial for cranes and waterfowls. For grasping the relation between avian ecological group and habitat types and scientific management for resource, we used line transects to survey bird population and distribution during November-December from 2005-2009 at Zhalong, and used cluster analysis and Chi-Square tests to analyze data. We recorded 23 bird species of 15 families and 7 orders during the wintering period, including Anseriformes, Columbiformes, Falconiformes, Galliformes, Gruiformes, Passeriformes, Strigiformes. Geographic region and dominant vegetation were the main influence factors of wintering avian distribution at Zhalong. Different ecological groups preferred different habitat types (p<0.01). Reed marsh were strong preferred, next were farmland and open forest. Passeres preferred reed marsh, open forest and farmland; Raptatores preferred open forest and reed marsh; Terrestores and Grallatores all preferred reed marsh and farmland. Different avian ecological groups occupied specific habitats types and we recorded some overlaps in bird distribution.
Problems and Countermeasures on Urban Infrastructure Construction of Shenyang
Authors: Zhao Liang
Published: September 2013

nfrastructure construction is crucial for urban development. Urban infrastructure construction varies with different development stages, city size, and city characteristics. This thesis first introduces three types of infrastructure construction, including their advantages and disadvantages. And then, four main problems are posed based on the current situation of infrastructure construction in Shenyang. After careful analysis and comparison and a reference to the advanced experience at home and abroad, countermeasures are worked out from both temporal and spatial perspectives, to provide a referential basis for the sustainable development of infrastructure construction in Shenyang.
Effect of Hydrogen Partial Pressure on Hydrocarbon Production from Deoxygenation of Stearic Acid
Authors: Zhang Cheng , Sun Pei Pei , Zhang Wu Di , Chen Yu Bao , Yin Fang , Xu Ling , Zhao Xing Ling , Liu Jing , Liu Shi Qing
Published: September 2013

The catalytic deoxygenation experiments of stearic acid and hydrogen were performed for 6 hours in the presence of a solvent, dodecane, in a temperature range of 295-305°C and the rotational speed of 100rpm, under a certain hydrogen partial pressure (in argon), using palladium supported on active and mesoporous carbon as a catalyst. The results showed, the main liquid-phase product was n-heptadecane, while the main gaseous products were CO2and CO. When the partial pressure of hydrogen is 3.0MPa, the acid value of primary product is the lowest and the reaction tends to be gentle, conversion rate of stearic acid and selectivity to n-heptadecane is the highest.
An Algorithm of the Rough-ISM Analysis Method
Authors: Sheu Tian Wei , Chen Tzu Liang , Tsai Ching Pin , Tzeng Jian Wei , Nagai Masatake
Published: September 2013

In this paper, an algorithm of the Rough-ISM analysis method is proposed. The Rough-ISM analysis method is the combination of the Rough set theory and Interpretive Structural Modeling (ISM). It is not only a simple research method, also a practical way to find the students misconceptions. In addition, the most important thing is that the analysis method can overcome fewer participates and problems through Rough set theory statistically. Through the analysis method, common misconceptions of whole class can be found and then and then supplying teaching path for teachers to conducting remedial teaching based on common misconceptions. Finally, a practical example is provided to make the calculate process more clearly.
Compaction Management: Results of a Demonstration Project
Authors: Parente Manuel , Correia António Gomes
Published: September 2013

Compaction management, also referred to as intelligent compaction (IC), is a real time automatic operation adjustment and continuous compaction control technology of soils or asphalt layers. It is essentially a technology for optimization and evaluation of the compaction process, being capable of adjusting the compaction energy applied to the material, increasing or decreasing compaction efficiency in the necessary areas according to an acceptance target value, thus attaining maximum stiffness, while preventing overcompaction and minimizing the total number of passes. This study seeks to assess in a case study the IC performance, in comparison with conventional compaction methods in terms of efficiency in compaction of a sandy soil. For this purpose, a specific experimental section was carried out in which the performance of an IC compactor was compared with a conventional heavier class compactor. Data was obtained and analysed by the IC continuous information, as well as by the application of several different conventional compaction control tests and methods. Results show that the IC technology presents a superior performance, as well as various advantages when compared to conventional compactors.
Compare of Impregnating Poplar with UF and PF Resin
Authors: Han Jian , Liu Kai Neng , Gao Xi Tao
Published: September 2013

Through impregnation with UF and PF resin, the modification technology of Poplar was experimented and studied. The study results showed that WPG(weight percent gain) of the test-pieces impregnated with UF and PF resin had less difference. The wood vessels were scarcely filled by resin especially UF resin. Regardless of impregnating with UF or PF resin, the cell lumens near the veneer junctions are basically filled by the resin. But the most of the cell lumens depart farther from the veneer junctions were only filled by PF resin instead of UF resin.
Forecast Method Study on Track Longitudinal Level Irregularity Based on Most Possible Similarity Model
Authors: Zhong Chun Yan , Xu Yu De
Published: September 2013

Track irregularity is objective existence, it cant be eliminated. But, we can formulate reasonable repair and maintenance plans to increase the efficiency of track maintenance and ensure safety, if the prediction of track irregularity is effective. In this paper, on the basis of analyzing on the irregularity forecast method and the "memory" of ballast track, a method based on most possible similarity model is introduced. This method is going to find irregularity in history most close to the current, and use its development to predict the current development. The longitudinal level irregularity of Hefei-Wuhan line was predicted, and results indicate that prediction graphics were consistent with the actual graphics in trend. So, using this model to predict development trend of track longitudinal irregularity is feasible.
RGB Primary Color LED Backlight System Based on MCU
Authors: Wang Chong
Published: September 2013

A solution was proposed for the purpose of backlight. According to the principle of three primary color£¬A kind of RGB led backlight was designed with ncp6223 chip dedicated to the RGB illumination or backlight LCD display when ncp5623 was controlled by MCU. The realization of I2C bus which was used to control ncp5623 was taken the measure of direct driving of ncp5623 Using two arbitrary general-purpose IO pin of MCU. In respect of communication protocol, the software simulation was taken. Moreover only minimum system was needed for MCU. This method mentioned above simplified design and cut the cost because of absence of master I2C controller. In respect of software design, every template which realized a function of ncp5623 in the manner of software simulation of I2c protocol was given. In another word, a general method was given. From these templates, a lot of design such as Gradual intensity Dimming, RGB function and so on can be realized. This has a great signification for teaching and practice.
Bloom Filter Routing Protocol for Wireless Sensor Networks
Authors: Zhou Jiang Wei
Published: September 2013

Although the geographic routing protocols have better hop stretch,control overhead, storage cost and scalability than other existing routingprotocols for wireless sensor networks, source nodes need to know thecoordinates of destinations before routing data packets. To deploy thegeographic routing protocols on the real networks, it should integrate theseprotocols with location service and even virtual coordinates assignmentalgorithms. However, so far, because of the limited executable memory of sensornode, there is not a geographic routing system presented, which integrates withgeographic routing protocols and location service. Based on the above reason, anew Bloom Filter routing protocol for wireless sensor networks (BFR) ispro-posed. Like VRR, BFR is based on the identifier of sensor node butEuclidean space, so when it routes, it does not depend on the geographicinformation of nodes. Experimental results show that, compared to VRR, BFR haslower hop stretch, the storage cost and control overhead are much lower. Theresults also show that BFR is more scalable than VRR. Same as VRR, BFR can bedirectly deployed on the real sensor networks.
3PL-HUB Supply Chain Logistics Cost Simulation Study Based on System Dynamics
Authors: Zou Jun , Shan Liang
Published: September 2013

System dynamics provides a more intuitive and effective tool for system analysis in area supply chain logistics. By using method of system dynamics, this paper builds up a 3PL-HUB three echelon supply chain system from the perspective of costs, compares supply chain logistics costs variation in two cases with and without 3PL-HUB involved in, simulates logistics costs of each node enterprise, and fully analyzes the influence of 3PL-HUB on bullwhip effect and fluctuation of inventory of supply chain members. It shows that 3PL-HUB can reduce costs and benefit all the enterprises of whole supply chain, which represents a method to enhance supply chain synergy.
Comprehensive Evaluation on the Development of Industry Cluster Circular Economy
Authors: Zhang Jian , Wang Nan , Hong Jie
Published: September 2013

In allusion to the issues for further evaluation research into the circular economy development on the industrial cluster level, the paper constructs a comprehensive evaluation index system for circular economy, combined with industrial cluster’s own characteristics. And this paper determines the index weight based on comprehensive weighted method that combines objective information entropy and subjective AHP method, and then builds a comprehensive evaluation model of circular economy industry cluster development.
GMSPPF for Magnetic Ellipsoid Tracking with a Magnetic Gradiometer Tensor
Authors: Wu Zhi Dong , Zhou Sui Hua , Zhang Hong Xing
Published: September 2013

Magnetic ellipsoid tracking problem is characterized by high nonlinearity. In this study, the determination of target position, magnetic moment, and velocity is formulated as a Bayesian estimation problem for dynamic systems, a recursive approach is proposed to estimate the trajectory and magnetic moment component of the target using data collected with a magnetic gradiometer tensor. Particle filter provides a solution to this problem. In addition to the conventional particle filter, the proposed tracking and classification algorithm uses Gaussian mixed mode to represent the posterior state density of the unknown parameters, which is named as Gaussian mixture sigma point particle filters(GMSPPF). The performance of the proposed method has been evaluated through simulation experiment. The results indicate that the method has achieved the magnetic ellipsoid tracking and GMSPPF has better estimation performance and less computational complexity than other related algorithms.
Molecular Cloning and Expression of β-1,4-endoxylanase Gene from Chaetomium cupreum in Yeast Saccharomyces cerevisiae
Authors: Zhang Hai Yan , Li Wen Rao , Li Min
Published: September 2013

The gene encoding an endo-β-1,4-xylanase (XynCC) fromchaetomium cupreumwas amplified using PCR. The nucleotide sequence of a 690 bp cDNA fragment was determined. Based on the nucleotide sequence, calculated molecular mass of the enzyme was 24.7 kDa. The XynCC gene was inserted into the pYES2 vector and transferred into the cells ofS. cerevisiaeH158 for heterologous expression.
Synthesis and Characterization of Mesoporous Molecular Sieve Al-MCM-41 Using Kaolin as Raw Material
Authors: Li Miao , Wang Hong , Li Xian Qing , Liu Jin Rong
Published: September 2013

Ordered hexagonally mesoporous molecular sieve Al-MCM-41 with Si/Al (atom) ratio=9 was prepared by hydrothermal synthesis using raw kaolin. X-ray diffraction (XRD), Nitrogen adsorption desorption, Transmission Electron Microscope (TEM) and Energy Dispersive X-ray Detector (EDX) were employed to characterise raw kaolin, calcined kaolin, as-synthesized and calcined Al-MCM-41. The results indicated that characteristic reflections of raw kaolin disappeared after calcination, both of as-synthesized and calcined Al-MCM-41 exhibited well ordered hexagonally mesoporous molecular sieve structure.