bluuebunny/crossref_metadata_2025 huggingface dataset:
Multi-Frequency Heterodyne Phase Shift Technology in 3-D Measurement
Authors: Wang Le , Song Lei , Zhong Li Jun , Xin Peng , Li Shuai , Qi Huan
Published: September 2013

According to the characteristics of the fringe patterns noise, came up with a small area spin filtering noise cancellation algorithm based on parallel marker technology. It means that preprocess the fringe pattern before spin filtering, then did a median filter and calculated the stripe direction, finally used the extract the fringe direction to spin filtering of the original image. The algorithm can marked several targets in scanning process at the same time. So it has a high efficiency. The algorithm can be used in the multi-frequency heterodyne phase shift technology .And we can use the technology to complete the measurement of complex surfaces. Experimental results show that the method has a distinct advantage in measurement accuracy, measurement speed, and noise immunity.
Multiple Reflection Cancellation Using High Order Statistics Adaptive Filter for Scattered Triangulation Laser Displacement Sensor
Authors: Yang Guang Yong , Hu Guo Qing , Guo Bo
Published: September 2013

AS for the analog front-end (AFE) with charged-coupled devices for the scattered triangulation laser displacement measurement sensors (LDMS), surface roughness of objective and reflective optical routine have synergistic effects for AFEs precision and linear. The multiple reflection property resulted from different surface roughness characteristics and probability distribution of multiply scattered light in the optical images, were analyzed. To improve analog-front-ends signal-noise ratio and reduce the non-Gaussian noise, windowed cumulates projection of noise insensitive mean square error criteria, which is the strongly consistent identification algorithms with three order cumulants, is applied to high order statistics recursive least square adaptive filter. Simulation and the test results of experiment platform illustrate the performance of the proposed algorithm and accomplish the aim of multiple reflection cancellation.
Design of a Hand-Shape Image Acquisition System Based on DM642
Authors: Li Wen Wen , Liu Fu , Gao Lei
Published: September 2013

A hand-shape image acquisition system based on DSP was designed for solving the problem of hand-shape recognition. Acquisition configuration was designed, and the key parts (encoder, decoder, memory chip etc.) were selected. Finally, development of image capture driver was put forward. The imaging information were transferred into analog video signal by CCD camera, and analog video signal decoded was transferred to video port of DSP, after that one frame processed image was transferred to display after being encoded. Consequently, the final output image can be observed in displayer. System performance was evaluated by classification accuracy rate and real-time of recognition, and the results shows that the method proposed is reliable and effective.
Optimization Design of Planetary Gear Transmission Mechanism of Traction Unit
Authors: Li Li
Published: September 2013

In order to make the coal mining machine adapt the narrow work space underground, and the height of shearer is decided by the planetary gear transmission mechanism of traction unit. In this paper, the volume of planetary gear transmission mechanism is selected as objective function, and module of gear, teeth of sun gear, width of gear are considered as design variables based on mechanical transmission theory, and the optimized mathematical model of the planetary gear transmission mechanism of traction unit is established. The optimized mathematical model is solved by SQP(sequential quadratic programming) basd on Matlab program, the volume of planetary gear transmission mechanism reduces 20.22%, and the height of shearer decreases 11.3%.
Research on Situated Reconstitution of Non-Manifold Polyhedral from Function-to-Form Mapping
Authors: Xu Zhi Gang , Li Zi Xiang , Wang Jin , Liu Tao Tao , Sun Chun Po
Published: September 2013

Situated reconstitution is proposed in this paper to cope with un-manifold polyhedral from the function to form mapping processes. Specifically the situated reconstitution is not simply re-arrangement of geometric elements, mainly face entities in the un-manifold polyhedral, rather it needs a complex geometric/algebraic reasoning to reconstitute a manifold object, novel mathematical as well as AI techniques are introduced in this paper, several tools are developed to testify the proposed situated reconstitution in the “top-down” design automation systems.
The Processing and Analyzing of Non-Structured Data in Digital Investigation
Authors: Luo Wen Hua
Published: September 2013

The proportion of Non-structured data in total amount is much more than that of structured data. But the research on the method of processing and analyzing non-structured data is not as deep as that on structured data. This paper illustrates the importance of the research on non-structured data. Then from the angle of digital investigation, it illustrates the key techniques of its processing and analyzing ways. And it combines the self-developed Intelligent Analyzing System of Mass Case Information and the background of handling the online ball gambling in Chinese mainland, it illustrates in detail the specific application of non-structured data processing and analyzing in digital investigation.
A Briefest Feature Subset Selection Algorithm Based on Preference Attribute
Authors: Yang Kai , Jin Yong Long , He Zhi Jun
Published: September 2013

Concept lattice is the core data structure of formal concept analysis and represents the order relationship between the concepts iconically. Feature selection has been the focus of research in machine learning.And feature selection has been shown very effective in removing irrelevant and redundant features,also increasing efficiency in learning process and obtaining more intelligible learned results.This paper proposes a new briefest feature subset selection algorithm based on preference attribute on the basis of study of concept lattice theory. User can put forward a preference attribute according to their subjective experiences, all the briefest feature subsets containing the given attribute can be discovered by the algorithm. It firstly find some special concept pairs and calculate their waned-value hypergraph, then obtain the minimal transversal of the hypergraph as a result. A practical example proves the method is cogent and effective.
Query Expansion Based on Books Tags of User’s Social Relations in XML Book Search
Authors: Li Xin Ye , Huang Han Juan
Published: September 2013

Queries provided by users are usually too fuzzy and simple, which cannot provide sufficient evidence for the book search system to find relevant books. Previous query expansion focused on expanding similar words for query, which may not represent different user real-time interested. Since the user friends and interesting libraries may represent the interesting book types for the user for a certain stage, this paper proposed a novel method by finding expanded words from the books tags marked by user social relations in their personal digital library. This paper presents two query expansion methods: Query expansion based on books tags of user friends; Query expansion based on books tags of user interesting libraries. Experiments on the actual book dataset show that the two methods greatly improve the nDCG@10 values of the search results and the user satisfaction.
Multitask Fuzzy Learning with Rule Weight
Authors: Li Zhen Xing , Li Wei Hua
Published: September 2013

In fuzzy learning system based on rule weight, certainty grade, denoted by membership function of fuzzy set, defines how close a rule to a classification. In this system, several rules can correspond to same classification. But it cannot reflect the changing while training several tasks simultaneously. In this paper, we propose multitask fuzzy learning based on error-correction, and define belonging grade to show how much a sample belongs to a rule. Experimental results demonstrate efficiency of multitask fuzzy learning, and multitask learning could help to improve learning machines prediction.
Building Information Architecture of the Internet of Things
Authors: Zhang Xiang
Published: September 2013

This paper discusses the origin and baseline of information architecture in the Internet of Things with its modeling and structures in system and customer views. It also explores the differences and highlights several ways to sort information into groups of extreme value, some value and useless. Finally, an architecting model and the method to process information are shown to depict the structure of the Internet of Things.
Study on the Development of Energy Management in Iron and Steel Enterprises Based on Circular Economy
Authors: Hao Ya Qi , Dai Shu Fen
Published: September 2013

Based on an analysis of the operational levels and characteristics of circular economy, the present thesis aims to explore the development of energy management in iron and steel enterprises on enterprise, regional and social levels. Under the guidance of circular economy, the energy management in iron and steel enterprises is in line with the environmental requirement and energy recycling, and is beneficial to improve energy efficiency, decrease cost and achieve sustainable development.
Design of Products and Processes: A Perspective from the Pyramid Model of Value System
Authors: Ma Qing Guo , Fu Hui Jian , Niu Dong Xiao , Zhu Ya Li , Zhao Da Chun
Published: September 2013

This paper started with the review of the evolvement of industrial engineering and illustrated the new problems encountered in modern industrial engineering. By using the Seven Elements Pyramid Model in the new generation of value engineering, researchers and practitioners are able to discover the sources and processes of value generation. Moreover, since human resource is an indispensible part of value engineering, we find it is in great need of new research methods to study workers’ physiological and psychological status in the course of work. Therefore, neuroscience methods are introduced into the modern industrial engineering, creating the new field of Neural Industrial Engineering (NeuroIE).
Mobile Adverting: The New Promising Marketing Channel
Authors: Xu Yan Yan , Zhao Yan Wu , Fang Zheng , Ren Yan Dong
Published: September 2013

As the repaid development mobile phone and mobile internet, the mobile phone is considered as the import interface between brands and consumers by managers. Mobile advertising, Mobile advertising, which is defined as any form of marketing, advertising or sales promotion activity aimed at consumers and conducted over a mobile channel, is becoming the new promising marketing channel. Mobile advertising is getting more and more sophisticated. Thus, how to apply mobile advertising to increase advertising effect is an important challenge for CMOs. To help the CMO to understand the mobile advertising, this paper reviewed recent advances in mobile advertising researches.
The Design of Hydraulic Vibratory Fruit-Vine Separation System for Processing Tomato
Authors: Li Cheng Song , Qu Jing Li , Wang Le , Liang Rong Qing , Kan Za
Published: September 2013

Fruit-vine separation devices of processing tomato are being used for self-propelled tomato harvesters, while the traditional eccentric block-type processing tomato fruit-vine separation devices are structurally complex and requiring the assembly of high precision. In order to improve the fruit-vine vibration separation system, the parameters of the operating conditions of 4FZ-30 self-propelled processing tomato harvest machine eccentric separation devices as well as other models with hydraulic system both at home and abroad have been analyzed, meanwhile the full hydraulic vibration system for the tomato processing separation of the fruit-vine have been studied and designed. The result show that this hydraulic system can match the control system and work normally and reliably, which has laid the theoretical foundation for the improvement of devices of the tomato processing fruit-vine separation.
Economic Benefit Analyses for Steam-Driven Induced Draft Fan on Basis of the Heat Balance Method
Authors: Xu Qi Sheng , Yin Shi , Wu Jie , Ma Xiao Qian , Yu Yue Xi , Tan Jian Kun
Published: September 2013

Based on the implementation of the project of steam induced draft by one factory, heat balance calculation was employed to calculate the coal consumption rate between steam-driven and motor-driven induced draft fans. Besides, an all-purpose economic evaluation method was employed to analyze the investment recovery term and sensitivity of the two plans. The results show that it needs 2.8 years to recover the full cost based on the standard coal price for RMB 900 yuan/t, the electricity price for RMB 0.43 yuan/(kW.h). The evaluation also provided other recovery terms in different electricity price and coal price.
Numerical Calculation of Fluid Flow in a Continuous Casting Tundish
Authors: Li Yang , Jin Yan , Yu Hui , Yang Kang , Ai Fan , Wang Jun , Huang Hong Bin
Published: September 2013

Placement in the middle retaining wall package, aimed at controlling the flow of liquid steel forms, so that movement of a reasonable level remained stable, while reducing interference from turbulence and dead zones, molten steel in order to extend the average stay of removal in favor of inclusion to improve the cleanliness of molten steel. Keywords:Tundish; Retaining Wall; Flow field; Mathematical Modeling; Inclusion;Optimization setting
Two New Flow Control Technologies Based on Vibration
Authors: Li Da Wei , Qiu Jin Hao , Nie Rui , Ji Hong Li
Published: September 2013

This paper aims at study the technology of flow active control to increase the wing lift and weaken the wing drag by using the method of fluid mechanics. There are two new active control methods proposed in this paper. In this article, the computational method is expanded to a three-dimensional wing model to verify the validity of the new active control technology. Research shows that the partial active deformation can improve the aerodynamic characteristics of airfoil by appropriate parameters optimize, moreover the effect of rotation was better. In the condition of low Mach number and rotational control, the lift coefficient can be increased 11%, the drag coefficient can be decreased 40%. The shock wave will move backward by control in the condition of high Mach number. The control effect of 3D model is not as good as 2D model.
Numerical Simulation of Influence of Oil Tank with Different Throat Areas on Mirror-Plate-Pump Performance
Authors: Lu Zhen , Lai Xi De , Zhang Xiang , Chen Xiao Ming , Song Wei
Published: September 2013

In order to study the influence of oil tank with different throat areas on mirror-plate-pump performance, numerical simulation by applying ANSYS CFX software was conducted between four oil tanks with different throat areas, which combined with the same mirror plate respectively. Contrastive analysis of external characteristics of different runner-pumps and energy losses in different oil tanks show that the change of throat area has little effect on the brake horsepower curve, but it has great influence on head and efficiency curve, both of which first move up and then decline with the decrease of throat area in the whole calculation flow range, and at the same time the change of throat area causes great change of losses in oil tank. Achieving the best match relationship between oil tank and mirror plate in design process can make mirror-plate-pump display the best performance.
Synthetical Dynamic Balancing of Mechanism Based on Optimization Simulation
Authors: He Zhao Xia , Liu Qing Tao
Published: September 2013

The dynamic balancing of crank-slider mechanism was achieved with the guidance of the computer aided simulation-based optimization technique. Taking the reaction force of the rotary pair of connecting links and the input torque as optimization objective functions, the design optimization process was carried out with random-direction optimization method after determining the sensitive independent variables and their variation ranges based on the synthetical planning. The modal damping parameter of simulation model was optimized with the guidance of dynamic balancing experiment and the accuracy of simulation was also improved. Finally, by comparing the results from experiment and from optimization simulation, it is shown that optimization simulation could facilitate to instruct and implement the synthetical dynamic balancing for four-bar mechanism.
Study on Driving Safety of Refueling Truck
Authors: Zuo Yong Gang , Li Zhu Xin , Chen Jun , Yang Jing , Zhang Zhen
Published: September 2013

In this paper,lateral slip, longitudinal slip, lateral overturning and longitudinal overturning of refueling truck are studied according to petroleum sloshing of refueling truck tank driving on road,the rules that driving safety of refueling truck changes with related parameters variation when Refueling Truck is been driven on ramp is analyzed, the unsafe factors causing driving instability is found.
Pyrolysis Features of Larch Bark and Xylem
Authors: Du Hong Shuang , Li Xiang Yu , Ren Xue Yong , Han Yan Xue
Published: September 2013

In this paper, the ultimate, proximate and component analyses of the Daxinganling larch bark and xylem were performed and intercompared respectively. The pyrolysis features of the bark and xylem were analyzed by using the differential thermal thermo-gravimetric analyzer (TG). The influences of heating rate on pyrolysis features were discussed. The results show: (i) the content of H is a little more in the xylem than the bark and the content of ash in the bark is two times of the xylem and the content of fixed carbon in the xylem is two times of the bark. The content of alcohol-benzene extract is significantly more in the bark than the xylem and the glarson lignin in the bark is two times of the xylem but the hemicellulose in the xylem is three times of the bark; (ii) the process of the bark pyrolysis has two pyrolysis areas, but the xylem has a only pyrolysis area, however, the main pyrolysis interval of temperature of the bark and xylem are between 420K to 720K, in which the weight-loss of bark is 87-91% of the full weight-loss and the xylem weight-loss is 91-95% of the full weight-loss. (iii) the DTG peak of the xylem is behind 25 K of bark, and the DTG peak of the bark is-0.47 but the xylem-0.93. (iv) the curves of the TG and DTG move to the side of the higher temperature a bit following the heating rate increased, while the main pyrolysis areas are wider.
Research on Influences of Wind Screens on Wind-Resistant Capability for Long Span Suspension Bridges
Authors: Xie Jia Li , Ma Cun Ming
Published: September 2013

As long span suspension bridges have high towers, large flexibility and low damping, it is a must to consider the wind-resistant stability in bridge designs, especially for sea-crossing bridges where there are always strong winds. To ensure the traffic safety under strong winds, wind screens are often installed on the bridge deck to reduce the wind speed over the roadway. In order to analyze the influence of wind screens on wind-resistant capability and driving security for long span suspension bridges, CFD wind tunnel technique is adopted to analyze the flutter stability, the buffeting displacement and the wind environment of the bridge deck with and without wind screens. According to the analysis, the installation of wind screens could effectively reduce the wind speed over the roadway, but it would also weaken the wind-resistant capability of the bridge. The analysis results could be used as reference for the wind-resistant capability optimization and the wind screen design for long span suspension bridges.
Adsorption to Cu2+ in Waste Water with Chitosan Intercalation Bentonite
Authors: Li Zeng Xin , Wang Guo Ming , Liang Qiang , Wang Xiao Feng
Published: September 2013

The development of new water pollution control technology, particularly the development of high efficiency and low cost adsorbents is imperative. A compound adsorbent was prepared with the combination of chitosan and bentonite. Bentonite was added in chitosan slurry of 95% the degree of deacetylation to prepare adsorbent which mass ratio is 1:5. Its absorptivity toward Cu2+was studied. The results show: the dosage of the adsorbent is 14 g/L,the mass concentration of Cu2+in wastewater does not exceed 180 mg/L,the pH value range from 6 to7,the adsorption equilibrium time is about 9 h and Cu2+removal efficiency is over 97%.The low cost of adsorbents can be used to control industrial waste water containing copper.
Effect of Specimen Preparation Method on Transmission Electron Microscope Investigation in a Bulk Metallic Glass
Authors: Liu Zhong Yuan , Tan J. , Wang G.
Published: September 2013

In this paper, high resolution transmission electron microscopy (HRTEM) has been used to observe a Zr41.25Ti13.75Ni10Cu12.5Be22.5 (at. %) bulk metallic glass (BMG) prepared from different methods, i.e. ion milling and electropolishing. The ion thinning brings out the white bulb pattern on the specimen surface and induces localized temperature increasing. The electropolishing does not influence microstructure of the amorphous phase. A new preparation technique of grinding method is introduced. For BMG, the electropolishing and grinding are the better method for TEM specimen preparation as compared with the ion thinning.
Growth and Characterization of Vapor Deposited Polyimide Thin Films
Authors: Chu Fu Tong , Li, Chuan , He Li Jun , Liu Xing Zhao
Published: September 2013

In this paper, we report on the preparation and characterization of polyimide (PI) thin films through vapor deposition polymerization (VDP). PI thin films were formed by vapour co-deposition of the precursor monomers pyromellitic dianhydride (PMDA) and 4,4-oxydianiline (ODA) following a thermal treatment at a temperature of over 300°C. The effects of the polymerization temperature on the characterization of PI films were investigated using scanning electron microscopy and Fourier transform infrared spectroscopy. The results showed that the deposited polyamic acid (PAA, a precursor of polyimide) with imidization in the temperature interval of 300-400°C are smooth, uniformly thick and form without shrinkage.
Experimental Study of Short-Term Creep Characteristics Base on Step Loading-Unloading Method for Hard Rock
Authors: Zhang Fu Jun , Liu Chuan Xiao
Published: September 2013

Based on experimental results of uniaxial compression and short-term creep using 8-step loading-unloading method, fine sandstone specimen, which lower creep limit is 27MPa, present typical brittle breakage properties of hard rock. The correlative coefficients of linear regression function for isochronous stress-strain curve are all higher than 0. 92, and the ratio of long-term strength to instantaneous strength reaches 94. 39%，which indicate that the whole creep of fine sandstone specimen is weak. The average correlative coefficients of linear regression function for isochronous stress- axial strain curve are 3. 92% higher than that of average correlative coefficients of linear regression function for isochronous stress- radial strain curve, so nonlinear creep property of the fine sandstone specimen in axial direction is correspondingly weaker than that in radial direction. Negative Gauss distribution can be applied collectively to nonlinear creep of fine sandstone specimen, which has obvious time effect.With increasing loading, the reduction degrees of average correlative coefficients of linear fitting functions of isochronous stress-axial strain curve and isochronous stress-radial strain curve are 0. 97% and 0. 67% respectively, which indicates the linear correlation decreases commonly. Thus, the degree of nonlinear creep for fine sandstone specimen increases along with loading stress with obvious stress effect.
Effects of pH Value and Water Content of Sol on TiO2 Photocatalytic Activity Prepared by SAS
Authors: Shi Zai Feng , Zhang Su Min , Guo Su
Published: September 2013

To investigate the effects of sol pH value and water content on photocatalytic activity of TiO2 prepared with sol-gel auto-igniting synthesis (SAS) method, TiO(NO3)2 was prepared with TiCl4 as raw material and used as precursor of TiO2. By changing sol pH value and water content, different TiO2 powders were prepared and characterized with XRD, SEM and photodegradation of methylene blue (MB). Results indicated that TiO2 presented the highest photocatalytic activity while sol pH value and mass fraction of water were adjusted to 7 and 50% respectively while the mole ratio of n (TiCl4): n (citric acid): n (ammonium nitrate) was fixed as 1: 1: 3. The TiO2 powders were confirmed as loose and porous anatase type with particle size of 15 nm by SEM and XRD.
The Cascaded Effects in the Frequency Selective Surfaces Sculpted from Carbon Fabric Reinforced Epoxy Composite Panels Coated with Conductive Silver Paste
Authors: Li Chang Liang , Jiang Da Zhi , Zeng Jing Cheng , Xing Su Li , Ju Su
Published: September 2013

In this work, a kind of conductive polymer-silver paste was used to fabricate carbon fabric composite frequency selective surfaces (FSS) with four-legged slot elements. Screen printing and 3D engraving process were carried out to coat the conductive polymer-silver paste onto the carbon fabric preform and sculpt composite panels into composite FSSs, respectively. Free space and finite element methods were carried out to measure and calculate the electromagnetic transmission characteristics of the composite FSS, respectively. The calculated results are in good agreement with the experimental data. The cascaded effect in double-layered FSS were investigated by finite element method and design of experiment technique (DOE).
The Analysis on the Tribological Properties of TPU/PVC Blends under Oil Lubrication
Authors: Pan Dao Yuan , Wu Peng Peng , Gao Zhong Xue , Zhang Yu Zeng
Published: September 2013

Based on actual working conditions and parameters of the hydraulic steering gear, the purpose is optimizing the rubber seal of steering gear by different rubbers mixing technology. Compare the five kinds of rubber with metal of the friction characteristics in dynamic fit, it can obtain a performance excellent rubber real in the specific operation conditions. And then improve the overall service life of the steering gear. It is first prepared the same hardness TPU and PVC and blends that the ratio is 3:7, 5:5and7:3 in this article. The pros and cons of the five rubbers are analyzed in friction and wear properties of the above experimental. The test curve of coefficient friction and wear with time has been done under different load at constant low speed. It determines TPU/PVC = 3:7 blends through friction and wear and wear mechanism of five rubbers with steel comparatively analyses, and the heat resistance and wear resistance of them are better than the other TPU/PVC blends and PVC under oil lubrication conditions.
Study on Properties of Lightweight Aggregate Concrete Characterized by Environment Protection
Authors: Ma Jian Suo , Cai Huan Qin , Sun Jing , Bai Run Shan
Published: September 2013

To prepare concrete by applying industrial or agricultural wastes (energy saving materials) and natural lightweight aggregates, is a new pathway to develop lightweight aggregate concrete. The waste cornstalk, rubber particles made with industrial wastes, polyphenyl granules and natural pumice, as lightweight aggregates, are organically mixed with cement according to certain of proportion, so a kind of new multiphase composite lightweight aggregate concrete was prepared. The research results indicate that the raw materials after pretreatment can form good interfacial bonding with cements, improve further the performances of hardened concrete. The good workability, certain strength and low apparent density of concrete could be guaranteed.
Enhancement of Electrical Properties of ZnO: Al Thin Films on Transparent TPT Substrates by SiO2 Buffer Layers
Authors: Wang Xiao Jing
Published: September 2013

The electrical properties need to be improved, although Aluminum doped ZnO thin films (ZnO: Al) have been successfully deposited on transparent TPT substrates by our group. In this paper, ZnO: Al film was deposited on TPT substrate with SiO2 buffer layer by RF magnetron sputtering. The obtained film had a hexagonal structure and highly (002) preferred orientation. Compared with ZAO film without buffer layer, the lattice constant distortion of the film with buffer layer was decreased and the compressive stress was decreased by 9.2%, reaching to 0.779GPa. The carrier concentration and hall mobility of the film with buffer layer were both increased; especially the carrier concentration was enhanced by two orders of magnitude, reaching to 2.65×10+20/cm3. The resistivity of ZAO film with SiO2 buffer layer was about 7.6×10-3 Ω·cm and the average transmittance was over 70% in the range of 450~900nm.
Suspended Carrier Used in Municipal Wastewater Treatment
Authors: Huang Tian Yin , Wang Rong , Wu Wei , Liu Feng
Published: September 2013

In this study, suspended carrier bed process was applied to treat the effluent from the chemical-biological flocculation plant. The bio-startup characteristics and the mechanisms of biofilm maturation were investigated. Results showed that the NH3-N removal efficiency was higher than 80% after a 10d run, and the NH3-N concentration of effluent was lower than 5.0mg/L, which satisfies the needs of The Pollutants Discharge Standard for Municipal Wastewater Treatment Plants (Class I-A). In other words, the suspended carrier used here did a good job. The bed finished its bio-startup process with stable nitrification efficiency. The biofilm formed on the carriers wing plates, which was helpful for its adhesion and ageing biofilm to fall off. It was found through electron microscope observation and PCR-DGGE (Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis) that the biofilm which formed on the surface of the carrier contained plenty of microbes. The stability of the microbial system was efficient in stabilizing nitrification.
Start-Up of ANAMMOX Bio-Filter for Domestic Secondary Effluent in Ambient Temperature
Authors: Wu Di , Li Dong , Gao Wei Nan , Zeng Hui Ping , Zhang Jie
Published: September 2013

The start-up of ANAMMOX bio-filter for domestic secondary effluent was investigated in ambient temperature. The raw water for ANAMMOX bio-filter was the effluent from an anoxic-aerobic (A/O) phosphorous removal system. Nitrification biofilm was successfully transformed into ANAMMOX biofilm during 7 months, with the induction of added nitrite, hydrazine and oxyammonia. The highest TN removal rate reached 6.8 kg/m3/d during start-up, with observed growth rate of 0.0018 h-1 and doubling time of 16.45 d.
Performances of Dominant Thermophilic Cellulolytic Bacteria for the Bio-Drying
Authors: Tang Yu Lan , Zhang Jia Long , Wang Li Yan , Yu Jin , Liu Jun , Fu Jin Xiang
Published: September 2013

Six dominant thermophilic cellulolytic bacteria were separated from undigested dewatered sludge. By analysis of their water content, value of hydrolysis up, rate of weight loss of filter paper and CMC-enzyme activity, a dominant thermophilic cellulolytic bacterium named XW5was separated and inoculated in the dewatered sludge under simulating bio-drying conditions. The results showed that water content of the dewatered sludge which was inoculated dominant bacterium was decreased from an initial 70.05% to 62.49%.
Study on Valve-Closure Water Hammer in Gravity Pressured Water-Delivery System with Branch Line
Authors: Dong Ru
Published: September 2013

This paper analyzed the characteristics of valve-closure water hammer rising pressure, according to the basic theory of water hammer rising pressure in the gravity flow water-delivery system. It is indicated that the end valve-closure is the main cause of water hammer, and which is an important problem of influencing the safety and stable operation of the system. Combined With an engineering example that is a gravity pressurized water delivery system with the branch line, the paper studied water hammer rising pressure when the various combinations of valve-closure duration and angle . See that off valve water hammer boost of the branch line gravity flow system is more significant, more dangerous, so we recommend that reliable and effective security measures of practical engineering must be taken.
Influences of COD Model Components in ASM2D on Oxygen Mass Transfer Coefficient
Authors: Fu Xian Wei , Lin Chun Mian , Guo Ya Ping
Published: September 2013

Chemical Oxygen Demand was split into SA (volatile acid / fermentation products), SF (fermentable, readily bio-degradable organic substrates), XS (slowly biodegradable substrates), SI (Inert soluble organic material) and XI (Inert particulate organic material). Research of how these model components affect the oxygen transfer coefficient (KLa) was studied in this paper. The results showed that with the increase of SA, KLa decreased, KLa first decreased when SF was in 25-100 mgCOD/L, then it increased in 100-200 mg/L,then it decreased again. XS has a poor regularity and slight infect on oxygen mass transfer, XI, SI may inhibit the oxygen transfer.
Dual-Frequency Ultrasonic Desorption of Pb2+ from Coconut Shell Activated Carbon
Authors: Zhou Jian , Wang San Fan
Published: September 2013

Desorption experiments of coconut shell activated carbon (CSAC) saturated with Pb2+had been conducted in presence of dual-frequency and single-frequency (30 kHz,500 kHz,1200 kHz) ultrasound. The desorption efficiency was better at dual-frequency ultrasound than at single-frequency ultrasound. The best of desorption efficiency of Pb2+was 65.5% at 500×500 kHz. The desorption efficiency of Pb2+increased by increasing temperature, but when the temperature was more than 50°C, the desorption efficiency decreased initially. The stability of CSAC was not affected with cavitation effect produced by ultrasound of frequency of 500×500 kHz. The carbon loss was less. The rate of loss was only 0.6%. In conclusion, ultrasound was used as alternative method to regenerate activated carbon adsorbing with heavy metal ion.
Study on Removal of COD in Horizontal Subsurface Flow Constructed Wetlands by Regression Equation
Authors: Zheng Pu , Deng Zheng Dong , Ding Zhi Bin
Published: September 2013

At present the majority of studies on constructed wetlands reports are limited to a single wetland and hence the results lack broad representation. In order to study the general effect of treatment of sewage using a horizontal subsurface-flow constructed wetland, a more detailed wetland regression equation needs to be established to guide the design of constructed wetlands. In this study, we used the main pollutant index COD as the indicator and classified 1500 groups of collected data in accordance with the season, hydraulic loading, planting vegetation type and climate type classification in accordance with the "black box model". We analyses different factors affecting pollutant removal by constructed wetlands, using the impact of season and hydraulic loading as the main classification criteria. On this basis, in accordance with the linear regression method, 12 groups of regression equations for COD removal were established. The goodness of fit R2 values ranged from 0.65 to 0.95, showing the accuracy had been greatly improved. Using the regression equation in the design process can better estimate the removal effect.
Research on Nozzle Geometry Measurement with Synchrotron Radiation X-Ray Phase Contrast Imaging Technique
Authors: Xu Cang Su , Luo Qi Yuan , Ma Jian , Qi Fang , Xu Yi Fan
Published: September 2013

The performance and emission characteristics of diesel engines are largely governed by fuel atomization and spray processes which in turn are strongly influenced by the flow dynamics inside the injector nozzle. Accurate measurement of the nozzle geometry is important for the study of the flow dynamics. Using the third-generation synchrontron radiation light source of the ShangHai Light Source (SSRF), the research team successfully captured the internal structure images of the single hole nozzle and multi-hole nozzle. According to the captured images, the researchers clearly observed the internal structure of nozzle as well as the sac region. The diameter and length of the nozzles and orifice angle were also be accurately measured.
Hot Compression Deformation Behavior of AZ41M Magnesium Alloy
Authors: Wang Shou Ren , Wang Ying Zi , Sun Bin , Wang Yan Jun , Wang Min
Published: September 2013

The hot compression deformation behavior of Mg-4Al-1Zn-0.5Mn-0.5Ca (AZ41M) alloys during twin roll casting and hot compression (350-400 oC/0.1-1s-1) has been studied. Owing to adding Mn and Ca in AZ41 alloy, the deformation behavior and microstructure exhibit largely changes under different conditions. A bimodal structure consisting of a large fraction of deformed grains and a small fraction of newly formed grains are found in as-deformed alloys. Equiaxed and fine-grained microstructures occur in as-annealed samples. Al-Mn and Al-Ca compounds result in grain and Al-Mg intermetallic refinement.
Importance of Road Network Layout and Optimization Methods Based on the Reliability
Authors: Wang Xian Guang , Sun Xiao Nian , Wang Ming Wen
Published: September 2013

This paper conducts an in-depth research on applications reliability in highway network planning and optimization of construction sequence. It introduces the concept of reliability to the layout of the importance of the road network node and establishes a fairly comprehensive theoretical method of highway network planning based on the reliability from the aspects of the road network layout, evaluation, and construction sequence arrangements. Case study illustrates the proposed layout optimization method has achieved satisfactory results in the road network reliability analysis, displaying strong practical promotional value.
Park and Ride Facility Location Research of Rail Transit Based on Bi-Level Programming Model
Authors: Wang Xian Guang , Liu Zhen Guo , Mai Yuan Yuan , Sun Xiao Nian
Published: September 2013

This paper seeks to build new park and ride facilities (including the location and size) as well as expand the old ones based on the super road network composed of the road network and mass rapid transit (MRT) network. Park and ride facility location model of the outskirts of the city is established grounded infusing path-based user equilibrium assignment model and multi-assignment method, which is based on minimal investments. The calculation results of the model show that park and ride facilities on the outskirts of the city can greatly reduce the road traffic in central area.
Three-Dimensional Flow Numerical Simulation of Wuhan Yangluo Waterways
Authors: Liu Xiao Dong , Huang Li Wen , Sun Hai Lan , Fan Yao Tian
Published: September 2013

Using the orthogonal grid processing complex boundary problem, in environmental fluid dynamics model is established based on the Yangtze River Basin in Yangluo, Wuhan channel flow model. in the region to build the port of Yangluo in Wuhan before and after the construction of the water flow numerical simulation, and combining the simulation results puts forward the retionalization proposal.
Keywords: Yangluo Waterways,efdc,flow simulation
Research of Anaerobic Fermentation Hydrogen Production Process by Continuous Flow from Contained Sugar Wastewater
Authors: Li Yang , Huang Bing , Yin Yuan , Yan Ya Meng , Xu Ji Chao
Published: September 2013

The basal fermentation time and hydraulic retention time were systemically investigated about anaerobic fermentation production hydrogen process by continuous flow which is based on activated sludge for a basic strain and simulating sucrose wastewater for a substrate in a continuous stirred tank reactor. The highest hydrogen production rate was got at the fermentation time of 15h for and 6h for hydraulic retention time. The optimum run acidity (pH = 4.5 5.0) was kept through their own system circulation to hold the system state of high-speed and continuous hydrogen production. The results can really laid the groundwork for the anaerobic fermentation production hydrogen process by continuous flow from contained sugar wastewater from the laboratory research towards industrialization.
Experimental Study on Oil-Degradation Microbial Consortium from Oil-Contaminated Soil by Different Enrichment and Domestication
Authors: Wang Zhi Rong , Li Yan Ni , Zhu Xiao Yan , Wang Wei Li , Wang Jing Lan
Published: September 2013

In order to increase the effectiveness of remediation on oil-contaminated soil, culture techniques and molecular biological methods were adopted to analyze community structure enriched and domesticated by different ways. The results showed that the bacterial concentration cultured in a medium of inorganic salts and oil was 1.30×1012cfu/ml, while the bacterial concentration cultured in a medium of LB and oil was 3.05×108cfu/ml; Within the perspective of structure, the microbial community cultured in a medium of inorganic salts and oil contained 11 kinds of bacterial, Meanwhile, the microbial community cultured in a medium of LB and oil was composed of 4 kinds of bacteria. Based on the results of this study, it can be inferred that the cultured medium has a significant influence on the composition of microbial communities. When domesticated oil-contaminated soil was cultured in a medium of inorganic salts and oil, the microbial concentrations and diversities were relatively higher than those cultured in LB and oil.
Research on Influence of Flow Velocity Regime and Sediment Deposit before Underground Hydroelectric Station,Three Gorges Project
Authors: Huang Jian Cheng , Min Feng Yang
Published: September 2013

Based on test results of physical model, flow rate and regime and sediment deposit of underground hydroelectric station and diversion canal within 70-year operation of Three Gorges Project (TGP) have been analyzed. The primary reason of complicated flow regime before underground station is the confluence and interaction of two spout of flow, one comes from the diversion channel of underground hydroelectric station, the other comes from the communicating canal between underground station and right bank station, caused by excavation of Pianyanzi-mountion adjacent to dam. The head lose of power generation was increased due to that the increasing of the projects operational time, amount of sediment deposit before dam and discharge through the communicating canal strengthened intensity of reflow and surface velocity of approach. In order to make the mixed flows become single and forward flows in flood season, as well as reduce head lose of the station and improve the unit power generation benefit, we suggest to build dividing dike of communicating canal during the projects early operation time.
Water Environmental Regulations Pertaining to Urban Moats: An Example from the Qinhuai River, Nanjing
Authors: Zheng Lu , Si Ying
Published: September 2013

Moats are an important element of the historical development and management of urban environments in China. As a result of the rapid development of cities and long-term over-exploitation and pollution, problems have arisen in relation to urban moats, particularly with regard to the blockage of river channels, the reduction of river areas, and the deterioration of water quality. Treatment and upgrading of urban moats, in relation to the surrounding city and its rivers, is thus important for the harmonious development of modern cities. This is an important aspect of current urban planning and water conservation that affects the quality of life in cities. In this article we have conducted a case study on the Qinhuai River in Nanjing. Specific measures and achievements in relation to water treatment of the Qinhuai River have been analyzed in the context of enhancing water conservation while taking economic factors into account. We have also undertaken an analysis of management deficiencies in terms of environmental degradation of the Qinhuai River and have made recommendations on future management so as to promote harmonious environment-friendly economic development and the coordination of urban development and public health. The Qinhuai River can be regarded as a case study in which the need to maintain historical Chinese moats must be part of the management of the aquatic environment in modern cities. The aim of this study is therefore to provide a reference for water management in other cities.
Method to Determine Asphalt Film Thickness Based on Actual Measurement
Authors: Lv De Bao , Huang Xiao Ming , Guan Chang Lu
Published: September 2013

Based on the data got from actual measurement of mineral filler and aggregate surface area, this paper is going to present a new method, which is different from conventional approaches, to help to determine aggregate surface area. A formula that can be used to calculate aggregate surface area will be obtained. Currently, many methods are available to calculate asphalt film thickness. These methods are not perfect and deserve a new survey. Therefore, by referring to and analyzing those existing methods, this paper will put forward a revised, updated and instructive calculating formula to guarantee the accuracy of calculation.
Pretreatment of Seawater by PAC/PAM Coagulation-Photocatalytic Oxidation Process
Authors: Quan Yu Lian , Shi Bi Qing , Yang Li Jing , Zhang Ren Zhi
Published: September 2013

Coagulation-photocatalytic oxidation process was used for pretreatment of simulated seawater, which had moderate turbidity and more organics. The optimal conditions of PAC/PAM coagulation and TiO2 photocatalytic oxidation were investigated by simple variable method, coagulation and photocatalytic oxidation were combinated under optimal conditions finally. Results showed that when the dosage of polyacrylamide (PAM) and polyaluminium chloride (PAC) was 20mg/L and 0.5 mg/L respectively, the pH of simulated seawater was 8.0, the amount of TiO2 photocatalyst was 1.8g/L and UV radiation time was 1h, the removal ratio of the turbidity and CODMn in simulated seawater was 97.5% and 72% respectively. Synergistic effect between coagulation and photocatalytic oxidation eventually made turbidity and organics in the effluent water meet the requirements of reverse osmosis system.
Research on Regulation Thoughts for Shoal at Confluence of Xinzhou Channel in the Middle Reach of the Yangtze River
Authors: Zhu Yu De , Liu Peng Fei
Published: September 2013

This paper conducts in-depth discussion to influence factor of shoals refloating change through analysis. According to analysis, run of upper trench in the Xinzhou south channel and change of north channels inflow is the major cause of confluence refloating; the article also discusses and illustrates relative thoughts issues in the process of regulating shoal at confluence.
A Rapid In Situ Monitoring System for the Determination of Total Phosphorus in Waters
Authors: Wei Kang Lin , Chen Ming , Wang Fei , Fang Qiong
Published: September 2013

Total phosphorus is an much important key water quality parameter . In view of the technical defects of existing detection methods and instruments for in situ monitoring total phosphorus, a new detection method based on ultrasonic assisted sample digestion and spectrum analysis was put forward in this paper, and the automatic monitoring system prototype based on such detection method had been developed. Aiming at wastewater treatment, the spot experiment had been carried out to contrast prototype with Chinas national standard analysis method for on line measuring total phosphorus in the water, and the results of the comparative experiment showed that the automatic monitoring instrument prototypes had good repeatability (10%) and high accuracy (±10%), which met the technical qualifications of Chinas environmental protection industry standards.
E-Book Reader Research Based on Kansei Engineering
Authors: Li Yan , Liu Xiao Fei , Qu Zhen Bo
Published: September 2013

E-book reader is analyzed based on Kansei Engineering this paper. Investigation about e-book reader has been made and the investigation results are analyzed to get intention diagram, using quantitative theory IV class to establish engineering model. Improvement trend of the e-book reader is put forward to provide theoretical support for e-book reader.