bluuebunny/crossref_metadata_2025 huggingface dataset:
Preparation and Performances of Self-Compacting Concrete Used in the Joint Section between Steel and Concrete Box Girders of Edong Yangtze River Highway Bridge
Authors: Li Bei Xing , Guan Ai Jun , Zhou Ming Kai
Published: December 2010

The joint section between steel and concrete box girders is the key localization of the super-long span hybrid girder cable-stayed bridge in the Edong Yangtze River, a high strength self-compacting concrete (SCC) was required to use in the joint section. This paper systematically investigated the performances of three types of C55 grade self-compacting concretes (SCCs), such as plain SCC, micro-expansion and polypropylene fiber reinforced SCC and steel fiber reinforced SCC. The results indicated that the steel fiber reinforced SCC had the best workability and mechanical properties. The flexural toughness of the steel fiber reinforced SCC was much better than that of the other two types of concretes. The addition of steel fiber, or polypropylene fiber and expansive agent improved the crack resistance of SCC, and the micro-expansion and polypropylene fiber SCC reinforced had better crack resistance than steel fiber reinforced SCC. The three types of SCCs have very high chloride penetration resistance and advanced freezing and thawing resistance. Moreover, the test achievement of concrete casting technology for the full-scale model of steel girder chambers in the joint section is introduced. The steel fiber reinforced SCC was preferred to be used in the steel-concrete joint section.
Prediction of Shield Tunnelling-Induced Ground Settlement Considering Soil-Water Coupled and around Soil Disturbance Damage
Authors: Liu Ji Feng , Liu Bo , Zhang Hui Zhi
Published: December 2010

to evaluate the influence of soil-water coupled and shield tunnel construction induced around soil disturbance damage on ground surface settlement, the process of shield tunnel construction induced around soil disturbance is analyzed, the FLAC3D numerical simulation are carried out, and a newly-modified tunnelling-induced ground settlement calculation method based on disturbance degree of around soil and soil-water coupled is presented, and these methods are applied in case of Beijing Metro 10thLine. It is indicated that considering the influence of the shield tunnelling-induced around soil disturbance damage, and soil-water coupled induced soil properties weakening and the excess pore water pressure dissipating induced soil consolidation to the ground surface settlement are necessary, the calculating result of the newly-modified surface settlement prediction method, and the result FLAC3D numerical simulation all agree well with in-site observed data of Beijing Metro 10th Line.
Deterioration Evolutive Process of Cement-Based Materials under Sulphate Physical Crystallization Attack
Authors: Ma Kun Lin , Feng Xing , Long Guang Cheng , Xie You Jun
Published: December 2010

The influencing factors of sodium sulfate solution physical crystallization attack on cement mortars were investigated through analyzing the changes of macroscopical capability and microstructure of cement mortars in attack process. Results indicate that with partial soaking time increasing, more and more sulfate sodium crystals grow on cement mortars surface, and cement mortars surface is denuded gradually. Compressive and flexural strength increase first and then decrease in the deterioration process. In the attack process, porosity of cement mortars decreases first and then increases. Lots of sodium sulfate crystals accumulate in pores of cement mortars and crystallization pressure is on the rise, resulting in physical crystallization attack taking place.
Suppressing Expansion Due to Alkali-Aggregate Reaction by Using Limestone Powder
Authors: Wu Ding Yan , Fang Kun he , Liu Yong he
Published: December 2010

This paper is about the suppressing of the alkali-silica reactivity of limestone aggregate by using finely ground limestone aggregate. The accelerated mortar-bar expansion test (ASTM 1260) was used to evaluate the effectiveness of limestone powder in suppressing ASR expansion. Three mixes were used, respectively, 15%, 30% and 50% limestone power replacement of the cement. The results showed that deleterious expansions due to ASR could be suppressed by using reactive limestone powder. The effects depended on what the replacement amounts and the ages were. With appropriate replacement amounts, the deleterious expansions due to ASR could be reduced by using reactive limestone powder. Author believes that any type of mineral SiO2 with being grounded to certain fineness can suppress the ASR reactivity of aggregates, and the effectiveness of reactive aggregate powder is better than that of non-reactive aggregate powder. The replacement level that can control expansion varies with the type of mineral SiO2 and fineness of the aggregate powder.
The Impact of Corrosion on the Mechanical Behavior of Bolt
Authors: Li Xiao Yong
Published: December 2010

Corrosion is a negative contributor on the structural integrity of rock bolt and leads to degradation of the mechanical properties of steel rock bolt. Exposure to chloride, seawater, salt and saltwater and deicing chemical environments influences rock bolt and weakens it. In order to evaluate the influence of corrosion and the size of the steel on the mechanical properties of rock bolt, an experimental investigation was conducted on rock bolt whose rebar is 8, 12, 16, and 18 mm diameter, and which were artificially corroded for 10, 20, 30, 45, 60, 90, and 120 days. By the simulation corrosion test of loaded and unloaded bolts in Na2SO4 solution, the relation curves of the mechanical performance with the corrosive conditions and the corrosion time are given. The mechanical performance is compared between these two types of bolts. At the same time, the influential trend of the load on the mechanical performance of the corroded bolt is analyzed. The laboratory tests suggest that corrosion duration and rebar size had a significant impact on the strength and ductility degradation of the specimens. after being corroded in Na2SO4 solution, both the ultimate bearing capacity and the maximal tensility of loaded bolt decrease far more than those of unloaded bolt, and the endurance and service life of loaded bolt will also be shortened much more severely. The tensile mechanical properties before and after corrosion indicated progressive variation and drastic drop in their values.
A Simple Model of Predicting the Degree of Hydration of Concrete Using Artificial Neural Networks
Authors: Zhang Deng Xiang , Yang Wei Jun
Published: December 2010

Prediction of degree of hydration of concrete is very important on research of crack-resistance capability and durability of the structure. This article studied the relationship between degree of hydration and strength of concrete based on a large number of references, the results show that the compressive strength of concrete is closely related with the degree of hydration, and the correlation function is a function of water-cement ratio and has nothing to do with the temperature. The hydration degree and compressive strength of ordinary concrete is linear correlation, and the prediction model of degree of hydration of concrete was proposed based on BP Artificial Neural Networks.
Mechanical Characteristic of a Simple Supported Combined Parabolical Roof
Authors: Sun Ai Liang
Published: December 2010

In this paper, The cueved surface equation of the traditional combined parabolical is established by means of step function and the inclined coordinates. And then, the calculating formulas of the internal forces and deflection of the roof are derived from the throry of shallow shell and Navier method. Finally, a numerical example is given.
Constitutive Relation of Sulfate Attacked Concrete Based on Uniaxial Loading
Authors: Nie Yan Feng , Qian Chun Xiang
Published: December 2010

In this paper, the whole stress-strain curve of concrete attacked by sulfate and sulfate-chloride compound were investigated experimentally by an accelerated deterioration laboratory technique. For practical engineering applications, special attention of research was devoted to an ultrasonic nondestructive test (NDT) technique to estimate the damage extent. The curves were fitted very well with the same form of equations for the concrete suggested in the structure design code, but with different coefficients and value of feature points. Aanlytical expressions between the corrosion damage of concrete attacked by sulfate and the stress-strain relationship, constitutive parameters, value of character ponits,a series of mechanics parameters are achieved, which can be directly used in theoretical and numerical analysis as well as practical engineering detection and assessment of concrete structures attacked by sulfate.
Pozzolanic Reaction of Supplementary Cementitious Materials and Its Effects on the Strength of Mass Concrete
Authors: Yang Hua Shan , Fang Kun He , Tu Sheng Jin
Published: December 2010

The present study aims to investigate the opportunity to largely substitute low heat Portland cement of mass concrete with supplementary cementitious materials. The pozzolanic reaction of two types of supplementary cementitious materials, phosphorous slag powder and fly ash , were determined by X-ray diffraction, differential thermal analysis–thermogravimetry and scanning electron microscopy from 28 to 90 days. The properties of mortar and mass concrete containing 30% of supplementary cementitious materials were also investigated. Results showed that supplementary cementitious materials could decrease the amount of calcium hydroxide, fill the capillary pores, thus making the mortar and mass concrete more compact and durable. Long-term strength of mass concrete containing 30% of supplementary cementitious materials were comparable (or even better) than the control concrete (without supplementary cementitious materials) at constant workability, while the Young’s modulus was lower than the control concrete.
Optimum Study and Engineering Application of Mixing Ratio for C50 Concrete
Authors: Song Xiao Sheng , Xu Guo Qiang
Published: December 2010

The influence of fly ash content, water-cement ratio, sand ratio and polycarboxylic acid type water-reducer dosage on the early-strength and performance of C50 concrete is investigated combined with engineering application. The concrete mixture ratio is optimized by the orthogonal experimental design. Concrete strength, slump and slump loss are verified by experiments. Application results show the designed concrete mixture ratio reaches the expected requirements
Effect of Thermal Environment at Early Age on Hydration Phases Composition and Strength Development of Concrete Containing Fly Ash
Authors: Zhang Feng Chen , Shen De Jian , Zhou Ji Kai , Li Zhong Hua
Published: December 2010

Cement hydration at early age is sometimes in a certain thermal environment probably caused by hydration heat of mass concrete as well as cement productions curing at high temperature. And phases composition and strength development in thermal environment are commonly different from those in normal curing conditions. Phases composition and strength development of concrete containing different fly ash content curing in different thermal environment are studied in this paper. Experimental results show that compressive strengths of concrete with 0.3 water to binder ratio increase with the increase of curing temperature. Splitting tensile strength of concrete not containing any fly ash curing at about 50 is the highest among those curing at temperature between 40 and 80 . For concrete with different fly ash content, splitting tensile strengths increase approximately with the increse of curing temperature. Dehydration of ettringite and formation of monosulfate solid solution and AFm at higher temperature perhaps relate to the development of concrete splitting tensile strength along with different curing temperature. Adding fly ash to binder, curing temperature at which hydration phases change occurs is raised, which helps to explain that splitting tensile strengths of concrete with different fly ash content decrease little with the increase of curing temperature between 60 and 80 .
Study on the Electrical Model of Cemented Soil
Authors: Dong Xiao Qiang , Bai Xiao Hong
Published: December 2010

Cemented soil resistivity is one of its inherent properties which can be used to detect its unconfined compressive strength and polluted state. But the cemented soil resistivity is macroscopic showing of its microstructure conductivity. Its resistivity closely relates with resistivity of various material components, such as soil porosity, cement mixing ratio,etc. So further researching the electrical model of cemented soil is great significance. This paper introduces the existing cemented soil electrical model(Komine model). Then based on the microstructural observation of the SEM images of cemented soil, the problems of Komine model are pointed out. Furthermore a more reasonable microstructure is proposed. The new electrical model of cemented soil is set up on three hypotheses. This new model is composed of parallel structure and series structure. Some soil particles surrounded by the hydration products such as CSH or CASH connect with pore water parallel to form the series structure. The hydration products that continue to harden to form the cemented soil skeleton connect with soil particles and pore water to form the parallel structure. The new electrical model of cemented soil can explain better electrical conductive mechanism of cemented soil materials.
Experimental Study of Mechanical Behavior of Concrete Filled Steel Tubular Short Columns after Fire
Authors: Zhou Ming , Wang Xin Tang , Wang Wan Zhen
Published: December 2010

Mechanical behavior and bearing capacity of ordinary concrete filled steel tubular short column (NCSSC) and ceramsite concrete filled steel tubular short column (CCSSC) subjected to fire load are experimentally investigated. Effect of the parameters, such as the maximum value of fire temperatures, fire duration on the strength and ductility of the two types of specimens were especially discussed. The test results show that both of the specimens of NCSSC and CCSSC after fire have higher bearing capacity and better ductility, there was no descent segment in load-displacement curves of the most specimens after the fire load was subjected, and even the case that bearing load increased again after descent segment arose. It was concluded that the maximum response temperature of specimens and fire duration time has great effect on the axial bearing capacity of concrete-filled steel tubular short columns subjected to fire, and there is a turning point of temperature for the influence.
Application of Traditional Local Materials and Suitable Technology in the Modern Low-Carbon Buildings: A Case Study of Rammed Earth Building
Authors: Zhang Dong Xu , Liu Da Ping , Xiao Meng , Li He
Published: December 2010

It has been the consensus shared by every member of the society that we should protect the earth, benefit the future generations and take the road of sustainable development which is natural-based and coordinated with environment carrying capacity. Currently, no one can doubt the importance of low carbon living and low carbon architecture. Numerous new materials and high technologies have been used in the country all over the world in the course of low carbon architecture’s development, some of which has had a favorable result, such as London zero carbon emissions pavilion at the 2010 Shanghai World Expo. But China still is a developing country, for various reasons, it is premature to widely promote the expensive high-tech low-carbon buildings, and especially in the vast rural areas, the traditional local materials and suitable technology still could have general applicability. This paper takes the rammed earth building as example, by introducing the history of rammed earth building, the application status and some of the latest instances, and summarizes several advantages of rammed earth building: the first is that easy manufacturing processing could reduce the energy consumption; the second is that local materials could lower transportation costs; the third is that the clay materials with good thermal performance such as heat insulation and moisture property could ensure comfortable indoor environment, the last is that long service life and easy reclamation could recycle building materials. Then the author looks forward to the future development trends of rammed earth buildings, explores the new construction practices of rammed earth buildings. Finally this paper concludes that traditional local materials and suitable technology would play an important role in the modern low-carbon architecture.
Ellipse Particle Modeling for Fresh Concrete and Dynamic Simulation of Slump Test
Authors: Yuan Quan , Guo Zhan Qi
Published: December 2010

The Discrete Element Method(DEM) has become a powerful numerical method for analysing discontinuous media. This paper provides a new ellipse particle modeling of fresh concrete by DEM. So far, research has been limited to experimental research and qualitative simulation. In this research, the parameters are defined from rheology. Then, a quantitative simulation is proposed. Slumping behaviors of fresh concrete are simulated.
Experimental Research on Environmental Friendly Ash Aerated Concrete
Authors: Li Qiu Yi , Yang Xiang Ning , Gao Song , Zhang Lei
Published: December 2010

Aerated concrete is kind of normal silicate products, which is made by hydration of lime, cement, gypsum fly ash/sand, forming agent. And it has become the major wall material of frame structure caused by its characteristics of light weigh, high strength, and heat insulation. Petroleum coke is the by-product of delayed coking system in oil refinery. Oil refinery in coast area of east China mainly exploits high-sulfur crude oil from Middle East. The petroleum coke contains even 5-8% sulphur, and calcium injection desulphurization is usually employed to reduce the SO2 emission, and leads to that Ca/S of reaction is up to 2.0-2.5. Therefore, there remain many unhydrated Lime and desulfurized gypsum in petroleum coke. It presents drying powdery and a favorable cementing performance. In this paper, chemical and mineral compositions of petroleum coke desulfuration residue are analyzed by means of X-ray fluorescence spectrometer and X-ray diffracto-meter. And lime and gypsum are replaced by petroleum coke desulfuration residue to produce aerated concrete. The experimental results indicate that products made of high-sulfur petroleum coke desulfuration residue and fly ash has better performance than traditional lime aerated concrete products. The fly ash-desulfuration residue aerated concrete products possesses the dry density level of B06 [1] and strength of 4.5MPa. Consequently, it should have expansive application potential because of their prominent economic, social, and environmental benefits.
Influence of Mineral Admixture on Concrete Abrasion Resistance
Authors: Xie Yan , Yu Bin , Wu Xiao Mei , Fan Yue Ming
Published: December 2010

The abrasion resistance of concrete has been becoming more and more attention, this paper used ball bearing abrasion resistance test (GB/T16925-1997) to investigate the influence of mineral admixture on concrete abrasion resistance. Results indicates that concrete which is higher w/b (w/b = 0.5) can improve its abrasion resistance at 90d age when mixed with fly-ash, while mixed with both fly-ash and slag can improve its 28d and 90d abrasion resistance. Concrete which is lower w/b (w/b = 0.31), either mixed with fly-ash or with both fly-ash and slag, its abrasion resistance at 28d and 90d descends as well as the mixture content increased.
Analysis of High-Permeable Concrete Pavement Heat Transfer Mechanism
Authors: Wang Cong Feng , Ji Dao Bin , Yi Zhong Qiang , Liu Liu
Published: December 2010

Permeable concrete pavement is experiencing high solar radiation, air temperature, wind speed, rainfall and other natural factors cyclical influences. These factors and the high permeable concrete pavement surface heat exchange, making permeable pavement temperature inside the high instability of the heat generated. In this paper, convection, radiation, heat conduction transfer of three basic ways to analyze the high-permeable concrete pavement of the heat transfer mechanism in order to determine the boundary conditions and numerical simulation of temperature field basis.
Research of Particle Contact Mechanics Behaviors and Applicative Evaluation for Asphalt Mixture
Authors: Wang She Liang , Zhu Xi Yu , Tang Xian
Published: December 2010

Different gradation types may have different particle contact behaviors for asphalt mixture, so that it holds diverse pavement performances. The particle contact theory explains the particle contact behaviors law during movement. A particle contact behaviors model was established, which is easy to describe and apply on the spot. A line contact stiffness model was used to simulate particle contact behaviors for gradation types of CA0.2, CA0.4, CA0.6 and CA0.8 when particle of asphalt mixture is moving with dead weight. Their pavement performances were verified with Marshall test, wheel tracking test, gyratory compacting test and the index of potential energy test under optimum asphalt content. Test results show that their service performance is identical to simulation result of particle contact during movement with dead weight. With the help of the research, it can supply some theoretical and applicative bases for an optimum mixture gradation design and indoor gradation simulating design for asphalt mixture.
Application of Inorganic Cohesive Glue in Concrete Repair
Authors: Liu Shu Hua
Published: December 2010

The properties of inorganic cohesive glue and its appliance to repairing ordinary and high strength concrete were studied in this paper. Inorganic cohesive glue not only has high strength, but also has equivalent coefficient of expansion with that of concrete and steel. The mechanical performance of inorganic cohesive glue is better than that of concrete, and other performances are similar to those of concrete. In the concrete repair work, it can mend the ruinate concrete well, and the strength of the repaired concrete is as high as or higher than that of original specimen.
Study on the Preparation and the Construction Technology of Anti-Static and Anti-Corrosion Self-Leveling Floor Coating
Authors: Chang Yu , Liang Jian Feng
Published: December 2010

Multifunctional epoxy self-leveling floor coating with excellent anti-static and anti-corrosion characteristics is prepared by modified epoxy resin and curing agent which have excellent chemical resistance characteristics. Conductive materials are adding into the formula. The coating structure and the matching construction technology are designed for the anti-static and anti-corrosion self-leveling floor coating application.
The Design of Isolated Word Recognition Based on ARM9
Authors: Pan Hui , Xu Wen Shang , Wang Xiu Jing
Published: December 2010

Nowadays,the theory and technology of speech recognition have made great progress,but in actual usage,they worked not very well.For some usage on some certain conditions ,we designed a small list, isolated word recognizer. With this system, we chosed ARM9 as the processor,MFCC as the characteristic parameters of speech sequences and adopted DTW to do pattern matching, As a result,it achieved hign rate of recognition and performed perfectly.
Specific Intelligent Traits of a Kind of Quarternary Wavelet Packs with an Integer-Valued Expansive Dilation Matrix
Authors: Guo Hong Lin
Published: December 2010

In this work, the notion of orthogonal nonseparable quarternary wavelet packs, which is the generalization of orthogonal univariate wavelet packs, is introduced. The definition for orthogonal nonseparable quarternary wavelet packs is presented by iteration method. The orthogonality characters of quarternary wavelet packs are discussed. Three orthogonality formulas concerning these wavelet packets are estabished. Moreover, it is shown how to obtain new orthogonal bases of space from these wavelet packets.
A Revised Fuzzy Time Series Method
Authors: Yu Yan Hua , Song Li Xia
Published: December 2010

In this paper,we presents two methods to forecast secular trend and seasonal variation time series problems respectively. The revised fuzzy time series method uses Song and Chrisom’s first-order time-invariant model to predict such linguistic historical data problems. This method obtains a better average error than the error in Song and Chrisom’s method. The method using fuzzy regression theory solves the shortcoming that fuzzy time series method could not work in dealing with seasonal variation time series problems.
Based on Dynamic Grid and Color Indexed List Union Multi-Objective Reconnaissance Method
Authors: Liu Wan Ming , Wang Li Hua
Published: December 2010

The soccer robot assembly system belongs to the intelligence robot assembly system, this article take the YSU soccer robot assembly system as a platform, proposed based on the dynamic grid and the color indexed list union multi-objective reconnaissance method, improved in the original system in the multi-objective search process target acquisition slow and easy to lose the goal the situation.
Study on Hotspots Detection Based on CSSCI Academic Resource Ontology
Authors: Wang Hao , Su Xin Ning , Deng San Hong
Published: December 2010

Cross relation and its blending degree among academic resource would be revealed through association analysis of academic resource from CSSCI. So, this paper tries to change the traditional analysis mode that using association rule mining to gain the subject relationship based on single standard, and introduces the ontology mechanism with semantic description capabilities into the knowledge organization of CSSCI academic resource for organizing all kinds of academic concepts by object-oriented approach, so that to establishes CSSCI Academic Resource Networks Model based on Ontology. On this basis, knowledge mining technique will also be adopted to detect the research hotspots of disciplines from the perspectives of high-frequency themes and themes from influential entity in disciplines, to discover the interdisciplinary hotspots so as to promote the exchange of interdisciplinary and to clear the specific direction of interdisciplinary cooperation. Upon that, all kinds of analysis conclusions and scientific laws which have academic value and could generate academic influence would be obtained to support the decision for scientific evaluation.
Energy Saving Program that Replaces Water Chiller with Combined Air-Energy Saving System and Water-Energy Saving System
Authors: Wang Jin , Li Xin Lin , Li Shu Sheng
Published: December 2010

In spring, autumn and winter, centralized air conditioning system frequently produces excessive cooling, if we use both air-energy saving system and water-energy saving system for directly cooling, replacing the chiller cooling, we can achieve the objective of energy saving. This paper introduces the air and water-energy saving system operation strategies to determine the operation control methods of different seasons. Through case analysis, it shows that this design is feasible. The system is stable and easy to control and management. It has obvious effect of energy-saving. If the air-energy saving system and water-energy saving system mode is adopted, the add-on investment of equipment can be recovered within one year, with a better economic benefits.
Study on Operating Characteristics of Soil Source Heat Pump System of a Residential District in Summer
Authors: Li Xu Quan , Gu Min Jie , Niu Xi Liang , Hu Song Tao
Published: December 2010

Load characteristics of the residential district is different from public buildings, so residential district of soil source heat pump air conditioner system operating characteristics are different from public buildings. Studies have been made on operating characteristics of soil source heat pump air conditioner system in a residential district in Qingdao, analyzing energy consumption of soil source heat pump air conditioner system and exploring its operation laws. It provides the basis for design, operation and control strategies of soil source heat pump system.
Refrigeration Process and Optimization of BOG Recovery in LNG Filling Station
Authors: Du Hong Peng , Cui Jie Shi , Ji Zhong Min , Li Hong Yan , Jia Lin Xiang
Published: December 2010

Based on the recovery of vent gases for current popularity of small skid-mounted natural gas liquefaction process, in this paper, the nitrogen gas expansion refrigeration process and natural gas cooling self-expanding processes was simulated respectively. The main parameters of flow rate, power and temperature for the different refrigeration process are obtained also, and influence of different refrigeration process on performance and cost of recovery device. The simulation results show that the cycle of natural gas self-expansion with pre-cooling is used to recovery BOG gas with high efficiency, and simple operation. This cycle with pre-cooling will apply the cold energy of BOG efficiently.
Self-Adaptive Weighting Text Association Categorization Algorithm Research
Authors: Li Liang Jun , Zhang Bin , Che Yuan Yuan , Yang Ming , Li Tie Nan
Published: December 2010

In text association classification research, feature distribution of the training sample collection impacts greatly on the classification results, even with a same classification algorithm classification results will have obvious differences using different sample collections. In order to solve the problem, the stability of association classification is improved by the weighing method in the paper, the design realizes the association classification algorithms (WARC) based on rule weight. In the WARC algorithm, this paper proposes the concept of classification rule intensity and gives the concrete formula. Using rule intensity defines the rule adjustment factors that adjust uneven classification rules. Experimental results show the accuracy of text classification can be improved obviously by self-adaptive weighting.
Power System’s Reserve Margin of Coal Indicator
Authors: Huang Xun Cheng , Huang Nai Chun
Published: December 2010

Coal storage is adequate in China, building up thermal generator set exerts short construction period and low cost, 73% of thermal power generating units used out of 800 million units in China. The coal storage is to guarantee the normal operation of generating units, in order to ensure the stable operation of socio-economic importance. Some of the previous papers are also involved in the past to the genet coal storage issues, but most of them are in power enterprise perspective, with method of using the stored power enterprises maximize the benefits of the problem, this is the stand point of power grid enterprises to study the coal storage reserve margin for the economic stability of the whole society to run normally. This paper uses optimal control of differential equations for this problem and study carefully the mathematical derivation and calculation, finally prove that the economic performance needs proper functioning of the coal reserve margin indicators, and would be helpful for power system and the administrative department of government related management system, would also help power companies avoid coal supply risk in advance to some extents.ximately 20% by the publisher. Please keep this in mind when designing your figures and tables etc.
A Survey on the Architecture and Character of System Informatization
Authors: Guo Le Jiang , Zheng Feng , Hu Ya Hui , Liu Liang
Published: December 2010

System informatization is a synthetic application which combines control science, computer science and network technology. Informatization technology is more and more applied in industry control system because of its simple structure, easy maintenance and high reliability. This article reviews the development history of informatization, and introduces its current research statuses. Based on the basic theories and composition of informatization systems, this paper deals with the problem of observer and controller design for a class of informatization systems where the network connection only exists between the sensor and controller. Finally, the future developments of informatization system are outlined.
Research on Underground Coal Mine Production Process Analysis and Informatization
Authors: Wang Jin Feng , Feng Li Jie , Zhao Zhen , Yu Hua Jie
Published: December 2010

This article analyzes the characteristics of underground coal mine production process, and compares underground coal mine production process with discrete type and continuous type production processes. On this basis, it investigates the construction and implementation countermeasures on underground coal mine information system.
Image Encryption Algorithm Based on Chaos and S-Boxes Scrambling
Authors: Xian Zhuo Hui , Sun Shi Liang
Published: December 2010

Due to some features of images, traditional encryption algorithms are not suitable for practical image encryption. Considering this problem, a novel feistel network image encryption algorithm is proposed in this paper. Taking advantage of the desirable properties of mixing and sensitivity to initial parameters of chaotic maps, a sub key generator with couple chaotic maps is presented in this scheme. Meanwhile, the encryption algorithm includes a new mixing algorithm which is designed with thirty s-boxes of AES. To enhance the security of the new scheme, the encryption processes were combined in feistel network. The results of analysis and simulation experiments indicate that the scheme is secure and performed well in preventing attacks, such as brute force attack, entropy attack and statistics attack.
A Novel Real-Time Interactive LBS System for Large-Scale Smart Parks
Authors: Liu Zhi Han , Zhu Hou Cong , Yang Fang Chun
Published: December 2010

The paper introduces a novel real-time interactive LBS system, which can be applied to large-scale smart parks such as tourist resorts, Expos and campuses. Compared with the existing systems, some new functions in the proposed system are introduced. The system is composed of Service Center and mobile client. The Service Center provides services such as routine planning, congestion avoiding, announcements publishing and so on. The mobile client is capable to send various kinds of pre-defined requests to the Service Center and concurrently process real-time responses. The prototype system is illustrated to prove the usability and practicability.
Equilibrium and Kinetic Studies for the Biosorption of Aqueous Nickel(II) Ions onto the Pseudomonas alcaligenes Biomass
Authors: Xiao Xiao Cun , Fang Gai Xia , Zhao Er Li , Zhai Lv Bin , Shi Jun Shuai
Published: December 2010

The objective of this study is to assess the environmentaly friendly Ni(II) adsorption from synthetic wastewater using Pseudomonas alcaligenes biomass (PA-2). The ability of PA-2 to remove the Ni(II) ions was investigated by using batch biosorption procedure. The effects such as pH, dosage of biosorbent, Ni(II) initial concentration and sorbate–sorbent contact time and agitating speed on the adsorption capacities of PA-2 were studied. Biosorption equilibriums were rapidly established in about 60 min and the adsorption kinetics followed the pseudo-second order kinetic model. The maximum Ni(II) adsorption capacity determined from Langmuir isotherm were 82.23 mg/g PA-2 at pH 5.0, at 25±2°C and shaker speed 150 rpm, respectively. The carboxyl , hydroxyl and amino groups of the PA-2 were involved in chemical interaction with the Ni(II) ions depicted by Fourier transform infrared spectroscopic (FTIR) results. The study points to the potential of new use of Pseudomonas alcaligenes biomass as an effective biosorbent for the removal of Ni(II) and from environmental and industrial wastewater.
Impact of Technological Progress on Energy Resources Intertemporal Extraction Sequence
Authors: Cao Ming , Wei Xiao Ping
Published: December 2010

Technological progress is an important and complex factor which affects extraction sequence of energy resources. Based on the resources intertemporal extraction model, by means of comparative static analysis methods, we analyze the impact of technological progress on extraction sequence of energy resources. The results show that technological advance influences extraction sequence of energy resources in multiple ways, such as the stock of energy resources, energy consumption pattern, and marginal cost of mining. Different technological advance has different influence of intensity and direction. Technological progress adverse to restrain consumption may accelerate the resources depletion, but energy substitution is the effective way to achieve the sustainable utilization of energy resources.
Annual Performance of a Commercial Building with Liquid Desiccant Based Independent Humidity Control HVAC System in Guangzhou
Authors: Hou Zhi Jian , Xin Jing
Published: December 2010

Based on a new type of sprayed liquid desiccant total heat recovery device, a liquid desiccant system combined refrigeration system with the independent humidity control (IHC) strategy is presented, in which the entire latent load and part of the sensible load are removed by liquid desiccant fresh unit combining heat pump (LFUH). The air-conditioning cooling load of a commercial building is simulated by DEST software. And the energy consumption is calculated respectively for conventional air conditioning system and IHC system. Compared with ordinary systems, IHC system can achieve savings of about 20% of the power consumption per annum. In addition, the average coefficient of chiller performance (COP) can increase about 13.5%. The result sows that IHC system has better application prospects.
Production of a Novel Biopolymer by Culture of Pseudomonas fluorescens Using Brewery Wastewater and its Use for Dye Removal
Authors: Mao Yan Li , Xiao Xiao Cun , Liu Yan Jing , Zhao Er Li , Zhai Lv Bin
Published: December 2010

The optimal conditions of production of biopolymer by the culture of Pseudomonas fluorescens were examined, using brewery wastewater to replace glucose as carbon source and energy source in the culture medium. Results showed that the COD concentration in brewery wastewater favorable for the production of the biopolymer was 6000 mg•L-1, and an optimal culture condition of inoculum size of 5%(v/v), 28°C, initial pH 7.0 and shaking speed of 150 r•min-1, under the optimal culture conditions, the highest flocculating activity achieved for Kaolin suspension was 97.5% and 3.67 g biopolymer /L broth was obtained. The biopolymer was effective in flocculating some soluble reactive dyes in aqueous solution, reactive Light-Yellow K-4G and reactive Turquoise Blue KN-G with a decolorization efficiency of 95.8 and 96.2%, respectively，using 25 mL of the flocculant in 500 mL of 100 mg•L-1 dye solution.The decolorization efficiency was dependent on the flocculant dosage and solution pH.
Biosorption of Cadmium onto Pseudomonas fluorescens: Application of Isotherm and Kinetic Models
Authors: Yu Chang Li , Lu Zhi Peng , Ge Fa Zhi , Zhao Er Li
Published: December 2010

The present study was undertaken to evaluate the feasibility of Pseudomonas fluorescens biomass for the removal of cadmium ions from aqueous solutions. Batch experiments were performed to study the adsorption of cadmium on pH, Pseudomonas fluorescens biomass adsorbent with respect to initial Cd(II) concentration, contact time and biomass dose. The experimental data were modeled by Langmuir and Freundlich isotherm models. Langmuir model resulted in the best fit of the adsorption data. The maximum adsorption capacity for Cd(II) was 66.25 mg/g (pH 5.0 and 5 g/L biomass dose). Kinetics of adsorption followed second-order rate equations. The FTIR results of Pseudomonas fluorescens biomass showed that biomass has different functional groups and these functional groups are able to react with metal ion in aqueous solution. The results of the present study suggest that Pseudomonas fluorescens biomass can be used beneficially in treating industrial effluents containing heavy metal ions.
Principle and Realization of Self-Trusted Access Control
Authors: Hou Fang Yong , He Hong Jun , Xiao Nong , Liu Fang
Published: December 2010

This paper proposes a security paradigm named self-trusted access control. The paradigm brought forward here is absolute different from others. It gives the computer user more power and more confidence with computing, which is specially called self-trusted access control. Its realization structure consists of hidden sensitivity label, mandatory access control and user setting. All of its components are mainly constructed on hardware level with no cooperation of OS, which makes it to be free of any kinds of software attacks. That is to say, it has a unique structure to assure that computing is trusted for the user, because user’s intentions are faithfully executed. This paper describes its principle and shows the accomplishment of such control on general computer architecture. As described, such security paradigm can make trusted computing indeed trustworthy to computer user.
Equilibrium and Kinetic Studies of Aqueous Cesium(I) Ions Biosorption by Pseudomonas alcaligenes Biomass as a Low-Cost Natural Biosorbent
Authors: Zhu Tao , Wang Lei , Ge Fa Zhi
Published: December 2010

The Cs(I) biosorption characteristics of Pseudomonas alcaligenes biomass was examined as a function of initial pH, contact time and initial metal ion concentration. FTIR spectra showed that the principal functional sites taking part in the sorption process included carboxyl, hydroxyl groups and -CH3 stretching groups. The pseudo-second-order kinetic model was found to be well suited for the entire adsorption process of Cs(I) on Pseudomonas alcaligenes, which indicated the biosorption process operated through chemisorption mechanism. Adsorption equilibrium studies showed that Cs(I) adsorption data followed the Langmuir model, the maximum binding capacity of Cs(I) according to Langmuir isotherm were 81.05mg/g at pH 7.0 , shaker speed 150 rpm, at 27°C and for 60 min. The present study indicated that Pseudomonas alcaligenes biomass may be used as an inexpensive, effective and easily cultivable biosorbent for the removal of Cs(I) ions from environmental and industrial wastewater.
An Improved Error Concealment Algorithm for Wireless Video Applications
Authors: Liu Ji Ping , Wang Bo
Published: December 2010

This paper develops a new error concealment algorithm for the whole-frame losses in wireless video transmission based on H.264/AVC.At first,we propose a forward motion vector extrapolation algorithm based on variable-size block motion vector estimation to obtain the motion vector field of the loss frame without yielding the hole problems. Then, we partition the missing frame into several object regions by clustering the motion vectors, furthermore, we apply median filter to reconstruct the motion vectors for hole areas based on the reliabilities of neighboring motion vectors. Finally, all macroblocks in the lost frame are estimated by using the extrapolated motion vectors. Experimental results show that the proposed algorithm provides better image quality than conventional methods both objectively and subjectively.
Correlation Based Method to Detect and Remove Redundant Web Document
Authors: Poonkuzhali G. , Kumar R. Kishore , Keshav R. Kripa , Sudhakar P. , Sarukesi K.
Published: December 2010

The enrichment of internet has resulted in the flooding of abundant information on WWW with more replicas. As the duplicated web pages increase the indexing space and time complexity, finding and removing these pages becomes significant for search engines and other likely system which will improve on accuracy of search results as well as search speed. Web content mining plays a vital role in resolving these aspects. Existing algorithm for web content mining focus attention on applying weightage to structured documents whereas in this research work, a mathematical approach based on linear correlation is developed to detect and remove the duplicates present in both structured and unstructured web document. In the proposed work, linear correlation between two web documents is found out. If the correlated value is 1 then the documents are said to be exactly redundant and it should be eliminated otherwise not redundant.
Stability Analysis of a Class of Switched Lurie Systems
Authors: Mao Bei Xing , Wang Dong Xiao
Published: December 2010

Stability problem of a class of Lurie switched systems is investigated. All the subsystems of a class of switched systems are Lurie systems .The switching law is given using linear matrix inequality(LMI) and Lyapunov functions . The conclusion is given in LMI, so it is easy to realize.
Application of Computer-Aided Intelligent Training in Sports Control
Authors: Yu Yin , Gao Ping
Published: December 2010

based on the methods of literature, questionnaire, expert interviews, observation and so on, the article analyzes the concept, function, features and application area of Computer-Aided Intelligent Training , and gets the result of that the Computer-Aided Intelligent Training not only has the features of automatic, intelligent and controllable, and also has significant effects in practical application, such as electronics plan designing, information consulting from experts, sports skill simulating, training load monitoring, specialized technical analyzing and so on.
Analysis of Science and Technology Human Resource Information Management Application in China Enterprise
Authors: Shao Fang
Published: December 2010

According to science and technology human resources function inside enterprise is prominently important, various enterprises are more and more value science and technology human resources information management. The article described science and technology human resources present situation in China, introduced essential countermeasure to improve enterprise’s science and technology human resources information management, which help enterprises actualize science and technology human resources information management effectively.
Analysis of Port Authority to Improve Customer Satisfaction Based on DMAIC Mode of Six Sigma Management
Authors: Zhang Xiao Li , Zhang Ke Ying , Zhang Xiao Fei
Published: December 2010

The customer satisfaction is essential in the quality management of the port authority. To improve the customer satisfaction of the port authority in this paper the authors used the method of the DMAIC in the Six Sigma management. This article analyses the quality management of customer satisfaction in the port authority by using the SPSS software, fishbone diagram and other methods. There were presented that improved management could effectively enhance its service level and service quality that benefit increased by 20%. This point in this paper can improve the processes of key port business, their service management system, management capabilities and expand services.
E-Commerce Security Based on a Security Engineering Life Cycle
Authors: Wu Yan Yan
Published: December 2010

With the development of e-commerce, security has been the center of the transaction. This article analyses the technologies of e-commerce and then examines the issues related to the security of assets and transactions in the e-commerce components and activities. After examining the technologies used in e-commerce, the article goes on to identify the security requirement of ecommerce systems from perceived threats and vulnerabilities. Then e-commerce security is viewed as an engineering management problem. And a life cycle approach is put forward.
Modeling and Analyses of the N-Link Bent-Arm PenduBot
Authors: Yuan Shao Qiang , Li Xin Xin
Published: December 2010

Bent-arm PenduBot is more similar to human arm, which attaches more and more robot experts’ attention around the world. As the foundation of the multi-link PenduBot control, the mathematical model should be established first. Based on the method of kinematics and dynamics, the N-link bent-arm PenduBot mathematical models are established in this paper, including the nonlinear model and the linear model. The natural characteristics of different pendulum are analyzed. By using the condition number of the controllability matrix, the control difficulty for higher order systems is compared.