bluuebunny/crossref_metadata_2025 huggingface dataset:
Experiment Study of Dredger Fill Using Different Consolidation Methods
Authors: Yan Huan , Wang Qing , Sun Dong Yan
Published: June 2014

At present, there are many methods of the dredger fill foundation treatment, in which the most widely used application of vacuum preloading method. The dredger fill for test was taken from the Tianjin Binhai new area center fishing port area, separately carried on the self-weight consolidation and vacuum preloading consolidation. Through the indoor test of soil test physical and chemical parameters, comparing the moisture content, soluble salt amount and component, caption exchange capacity, PH value and physical and chemical index. The results show that: the clay content of soil sample in the central fishing port area is higher, degree of aggregation is high, liquid limit is less than 60%, Ip is more than 10, belongs to the low liquid limit clay. Relative self-weight consolidation, soluble salt content of soil samples after vacuum preloading drainage treatment are low, but the particle size composition change less. It is said that parts of salt in the soil samples discharge with water discharge in vacuum preloading process, vacuum preloading effect is better. Introduction All manuscripts must be in English, also the table and figure texts; otherwise we cannot publish your paper.
Air Pressure Reducer Modeling by CFD Methodology
Authors: Wu Ran Ran , Fan Ding
Published: June 2014

In this paper, the computational fluid dynamics (CFD) methodology as well as the shear-stress transport (SST) k-omega turbulence model was adopted to model the air pressure reducer (APR). Changing the gas needle’s displacement of APR continuously, the writer obtains the displacement-pressure characteristics of APR. In order to demonstrate the validity of these characteristics, a physical experiment was conducted, which generates another displacement-pressure characteristic. Comparing the two characteristics with a good agreement, it is indicated that the CFD methodology is suitable to study the displacement-pressure characteristics of APR.
Experiment and Simulation on Pressure Drop of Pleated Air Filters
Authors: Fu Hai Ming , Fu Yu , Xu Fang
Published: June 2014

In order to reduce pressure drop of filtration process and increase filtration area, filtration media would usually made into pleated shape. The designs of pleats numbers and pleats height in the unit length have greatly impacted on pressure drop of the filtration process. In this paper, filter pressure drop of pleated air filters were examined by theoretical, experimental and simulation studies. By solving pressure drop from the Navier-Stokes equation on basis of velocity function assumption, by using the concept of average pressure drop in wind gap width, pressure drop in pleated filters was calculated. The numerical simulation of pleated filtration media was developed via using FLUENT software package and flow field variation in gap of pleated media was simulated. The results of theoretical calculations were in agreement with experimental results. It was confirmed that reducing pleat spacing or increasing pleats height could increased the area of filtration media and reduce the overall pressure drop of filters, although structure pressure drop increased. There were best value between pressure drop of pleated air filters and pleat numbers in the unite length.
Key words: filtration medium; pressure drop; numerical simulation; air filter; pleated structure
Study of Multivariable PID Neural Network Control for the Compression Station of Large-Scale Helium Refrigerator
Authors: Peng Nan , Xiong Lian You , Lei Ling Long
Published: June 2014

With the fast development of superconducting, nuclear-energy and high-energy physics, further requirement of the system of large-scale helium refrigeration is brought forward by some associated subjects. The present controlling system of the system abovementioned is not well able to deal with the interruption such as the heat pulse impact. Thus, it leads to a new challenge that must be confronted with by the system of large-scale helium refrigeration.This paper aims at the control of gas management panel (GMP) in compression station of large-scale helium refrigerator. The neural network PID control of GMP in the system is introduced and simulated.
Development of SO2 Absorption Materials Having Low Temperature Activity by Base Adducted Complex Method
Authors: Osaka Yugo , Takahashi Fumiya , Tsujiguchi Takuya , Kodama Akio , Huang Hong Yu , He Zhao Hong , Taoli Hu He
Published: June 2014

Sulfur dioxide (SO2) including combustion exhaust gas is must be clarified because of its air pollutant in middle-scale facilities or marine ships. In this study, dry DeSOx filter is developed to capture SO2 within diesel exhaust. CaCO3 is focused on as SO2 absorption material. However, SO2 absorption materials has to be improved low temperature activity below 723 K. To improve the low-temperature desulfurization performance, physically and chemically modified CaCO3 was synthesized using the amorphous citric acid complex method and base adducted complex method. Development of CaCO3 having high specific surface area of 169 m2/g (HSSA CaCO3) by the amorphous citric acid complex method was succeeded. Then, Li or Na doped complex CaCO3 by HSSA CaCO3 was synthesized by base adducted complex method. It is found that these Li-doped complex CaCO3 have higher SO2 absorption performance than conventional CaCO3 and HSSA CaCO3. Its performance is reached 0.31 gSO2/gmaterial at reaction temperature of 723 K by TG experiment, as a comparison, that of conventional CaCO3 is 0.02 gSO2/gmaterial.
A Combined AC+DC Distribution Network Interconnected with Renewable Energy
Authors: Hao Dong Xin , Zhang Li , Liu Meng Qi , Dong Pan Ting , Wu Hao
Published: June 2014

The combined AC+DC distribution network in this study provides a coupling and decoupling strategy of renewable energy in DC mode by using zig-zag transformer, which makes each line transmit AC electrical power and DC power simultaneously. The proposed scheme is digitally simulated with the help of Simulink software package. Simulation results indicate lower line voltage drop and less active and reactive power loss in steady state; almost similar or even better transient effects in transient state, which demonstrates the feasibility of combined AC+DC distribution network of single line interconnected with renewable energy.
A Novel Method of Core Saturation Suppression for the AC+DC Distribution Network Transformer
Authors: Liu Meng Qi , Zhang Li , Lou Jie , Zou Liang , Zhao Tong
Published: June 2014

With the rapid development of smart grids, the interconnection between the grid and distributed renewable energy is the inevitable trend of future study. Because of the existence of the DC source in the combined AC-DC distribution network, the transformer iron core is easily saturated generating lots of harmonics and increasing the loss of the transformer. This paper presents a novel method based on inductive filtering technology of core saturation suppression of the transformer in the combined AC-DC distribution network, this novel method can suppress the harmonics caused by the flux saturation and forbid the harmonics intruding into the ac grid. In the end we build the simulation model to prove the correctness and practicability of this novel method.
Design and Prototype Test of a High Leakage Reactance Transformer-Based HTS Controllable Reactor
Authors: Huang Wen Tao , Song Meng , Hu Nan Nan , Cao Kun Nan , Lu Dong Dong , Du Jiao , Liu Chao , Niu Ren Kai
Published: June 2014

With the development of high voltage long distance transmission and expansion of the grid, continuous reactive power compensation devices, such as controllable reactor, become more and more important. This paper describes the design and prototype test of a high leakage reactance transformer-based high temperature superconducting controllable reactor (HLRT-HTSCR). Characteristics test results show the excellent impedance regulation characteristic of the prototype. DC critical current test of the superconducting winding shows that attention should be paid to the critical current of superconducting coil, avoiding over-current condition. This paper reveals the characteristics of HLRT-HTSCR by experiment, and will be of important practical significance to promote its development.
Diagnosis of Commutation Failures in HVDC System Based on Voltage or Current of the Converter Valve
Authors: Liu Tao , Zhao Tong , Zou Liang , Zhang Li , Liu Meng Qi
Published: June 2014

Commutation failure is one of the most common typical faults of HVDC, and it may result in subsequent commutation failures, even the outage of the HVDC system if without timely and effective regulatory measures. Trigger of the control measures depends on the rapid and accurate diagnosis of commutation failure. In-depth analysis of the commutation failure mechanism indicates its new substantive characteristics: valve voltage being continuously zero and valve current being continuous with high amplitudes, according to which a novel method for fault diagnosis of commutation failure based on voltage or current of the converter valve is proposed in this paper. Simulation results prove the accuracy and effectiveness of this method.
The Models of Superconducting Power Facilities: The Effect of Different Tape
Authors: Song Meng , Su Lu Shun , Deng Xu Zhi , Ren Li , Shen Shi Feng , Zhang Yi , Hu Nan Nan
Published: June 2014

Due to the high current density in 77K, the high temperature superconducting facilities are expected to improve the efficient in power transmission. Superconducting facilities electromagnetic design is highly dependent on the characteristic of the superconducting tape. As a result, the comparison of the effect of different tape in electromagnetic design should be studied. In this paper, several facilities model are used as example to analyze the effect of different tape utilization. The result shows in different application conditions, or, specific benefits are considered, there is a specific tape will be the best choice.
Step Response Measurement System for Impulse Voltage Dividers Based on Labview
Authors: Li Wen Ting , Zheng Yan , Liu Shao Bo , Long Zhao Zhi , Xiao Kai
Published: June 2014

A measurement system used for step response of impulse voltage dividers has been designed. This software can be used for various kinds of step response waveforms and can calculate them accurately. The calculation methods used in this system are in full compliance with the requirements in DL/T992-2006 and IEC60060-2. When the software used for the step response of impulse divider,the calculation results meet the requirements of stepwave response parameters with good accuracy. This software is simple to calculate and it can greatly enhance the efficiency of the step response parameter extraction calculations.
The Fault Diagnosis of a Class of Time-Delay Switched Systems
Authors: Wang Na , Lu Lai Jun
Published: June 2014

The actual engineering control systems are nonlinear [1-2] and uncertainty [3-4] at the same time, so the robustness and fault diagnosis of systems are more meaningful [5-6]. Sometimes the system is with switching characteristics, which makes the study of switched systems more meaningful. As one of the nonlinear systems, switched systems exist in the practical systems widely, and the phenomenon of delay exists in industrial control nature, or in the life of people widely [7-8]. So the fault diagnosis research [11-12] of nonlinear switched systems with time-delay [9-10] has attracted the attention of many scholars. Motivated with the above issues, the general form of a class of switched systems with time-delay is described in detail, which also mentioned lemma 1 (Schur complement lemma) and lemma 2, the two lemmas will be applied to the proof process of the conclusion. The core part is observer design for time-delay systems fault, which puts forward the uniformly bounded stable condition of fault estimation error system expressed as the linear matrix inequality, and Lyapunov stability is applied to the strict proof. At last, the simulation of MATLAB in a numerical example proved the validity of the conclusion.
A Fast Search Algorithm for Transmission Section Based on K Shortest Paths
Authors: Liu Xian Chao , Ren Jian Wen , Qu Wei Dong
Published: June 2014

A new algorithm based on K shortest paths is presented for quick search of the transmission section, and then the timely electricity network topology is transferred into a directed graph. Using this new algorithm, k shortest paths would be directly searched for; the transmission section influenced greatly by the power flow shift is then obtained quickly. To avoid leaving part of the search because criteria are too small tributary drain election when using a single path to ensure the integrity of the transmission section. Finally CEPRI36 nodes system simulation is analyzed, and the effectiveness of the algorithm is demonstrated.
The Design of Electronic Weighing Control System Based on Proteus
Authors: Sun Rong Xia , Feng Xing Wang , Hao Xing , Zhou Ying Chang , Wang Shuo Nan
Published: June 2014

The control core of this design is MCU AT89C51,with the sensor MPX4115,it can complete the detection of weighting signal.Use the ADC0832 chip to achieve signal conversion, the input use a square 4*4 keyboard,the output display use the LCD LM4229.Use C Language Programing to achieve the modular design of software,use proteus simulation system to achieve the measure of weight of nine kinds of goods,The weighing range from 0.546Kg to 4.980Kg;Its resolution is 0.001Kg;This system has the function of calculating total price,storing single price,alarming when the goods overweights.
Key words: AT89C51MCU;A/D exchange;Sensor
Study on Improving Microgrid Transient Power Quality by Super-Capacitor
Authors: Wei Dan , Zhang Wei , Wang Zhi Jie , Zheng David
Published: June 2014

Massive applications of the power electronic devices and non-linear loads lead to various power quality problems during the microgrids grid-connecting. Aiming at improving power quality of micro-grid, the structure of SCs’ main circuit and control circuit are designed. The model of super-capacitor energy storage system (SCESS) is established. A simulation model of micro-grid is also built up by using MATLAB and the simulation is conducted for different situations. Moreover, under Goldwind micro-grid platform, according to the result of MATLAB modeling and simulation, the SCESS effectively improves the transient power quality of the system.
Extreme Learning Machine in the Breaker Fault Diagnosis
Authors: Jiang Dan , Zhao Shu Tao , Ren Jian Feng , Xu Yu Tao
Published: June 2014

In order to improve the diagnosis method of the existing high-voltage circuit breaker fault, demonstrated a new diagnosis methord of mechanical failure of high voltage circuit breaker based on vibration signal. According to the factors of high voltage circuit breaker failure and the features of Single-hidden Layer Feedforward Neural Network, SLFN, a method of high voltage circuit breaker fault diagnosis proposed based on Extreme Learning Machine (ELM). Finally, the experiment proves the effectiveness of this method for breaker fault diagnosis based on vibration signal analysis and ELM.
A Novel PWM Technology Based on High-Power Current Source Inverter
Authors: Bai Jing , Lu Shi Qi , Liu Jian
Published: June 2014

This paper presents a new csi-hvusspwm technology with many advantages such as the better output waveforms and the high utilization ratio of dc voltage based on the study of the csi-spwm technology and csi-tpwm technology. Theoretical derivation and modulation principle of csi-hvusspwm technology are described in detail. Finally, the simulation results validate the feasibility and effectiveness of this novel technology.
Study on High-Voltage DC Power Supply for Electron Beam Furnace Based on Series Resonance
Authors: Fan Sheng Wen , Du Jun , Wang Ze Ting , Wang Peng
Published: June 2014

The high-voltage DC power supply for electron beam furnace belongs to Special Power Supplies. It has the characteristics of high voltage and high power. At present, the high voltage DC power supplies for electron beam furnace are mostly controlled by the silicon controlled rectifier operated by power frequency, which not only has the disadvantages of large volume but also doesn't has the characteristics of anti-short circuit capacity、 rapid protection and restart. This characteristic affects the service life of the electron gun and the quality of the smelting. To solve the above problems, a high frequency resonant converter has been used in high voltage power supply, reduced the volume of power supply and the switching loss, and achieved rapid protection and restart. Simulation and experimental research show that the power supply can meet the requirement of smelting.
Study on Preparation and Properties of In Situ Composite of Nano-SiO2 and Vinyl Acetate-Acrylate Emulsion
Authors: Wang Xiao Hui , Wang Ren Li , Dong Li Min , Lu Han Fei
Published: June 2014

Available nanosilica commercially was modified with silane coupling agent A-151, and then emulsion was synthesized with modified SiO2, vinyl acetate, methyl methacrylate and butyl acrylate by polymerization reaction. Effects the amount of emulsifier, initiator and organic nanoSiO2, etc factors on the performance of emulsion polymerization and latex film were investigated. The best test results of composite emulsion of SiO2 and vinyl acetate-acrylate were obtained by theoretical research and experimental operation: modified nanoSiO2 content of 3%, the content of 3% emulsifier OP, content of 0.5% potassium persulfate initiator.
Effect of Phase Sequence Layout on Electric Field under Overhead Lines
Authors: Jiang Yu Ze , Liang Zhen Guang , Li Can , Du Bin Xiang
Published: June 2014

This paper discusses effect of phase sequence layout on electric field under overhead lines. Charge simulation method is used. Examples of two circuit overhead lines and four circuit overhead lines show that phase arrangment of lowest height conductors has major influence and phase arrangment of middle height conductors has lesser influence on electric field under overhead lines. Interlacing placed lowest height conductors with different phase and phase arrangement of middle height conductors different from that of lowest height conductors help to reduce electric field.
Distribution Network Planning Based on Multi-Island Group Strategy Genetic Algorithm
Authors: Sheng Si Qing , Yang Shao Bo
Published: June 2014

In view of faults which the traditional genetic algorithm (GA) have such as slow convergence speed and easy to fall into the local optimum. This paper put forward a genetic algorithm which is based on the multi-island group strategy, and applied it to the distribution network planning. The paper has established a planning model which takes the yearly comprehensive cost as objective function and discusses the repair methods of islands, solitary chain and closed-loop to meet with the requirements of grid radial. Finally, the proposed method is planning on a 54-node grid to prove the effectiveness of the algorithm and model.
Research and Application of Medium-Speed Pulverizer Control Based on AGC Mode
Authors: Li Jun , Li Wei Wei , Li Hui Cong
Published: June 2014

Large delay is the main characteristics of medium-speed pulverizer system which used in subcritical and supercritical unit. By introducing and analyzing the operating principle and working process, considering energy saving and consumption reducing, and combined with the performance requirement of AGC (Automatic Generation control), recommend solutions were put forward. It can effectively solve AGC control problems of load and pressure control accuracy and ensure frequency stability of the grid, provide a reference for similar units.
Research on Flow Transferring Identification Method Based on WAMS
Authors: Xu Yan , Ping Han
Published: June 2014

In power system, flow transferring can cause non-fault overload. Traditional zone 3 distance relays cannot distinguish overload caused by faults or by transferred power flow and may operate incorrectly, thus cause cascading trips, even blackout. Based on wide area measurement system (WAMS), this paper proposes two criteria to realize flow transferring identification function. First, three-phase voltages and currents are measured and compared with those calculated before fault, which should be applied to the given identification criteria. Then, the logical relationship for flow transferring identification are put forward to prevent distance relays from incorrect behavior caused by non-fault overload and unblock zone 3 distance relays when fault occurs. Through the simulation results, the effectiveness of the proposed method is verified.
Correlation of Safety Climate and Near Miss of Coal Mine
Authors: Tian Shui Cheng , Gao Rui Xia , Zhao Zhi Qiang , Zhang Heng
Published: June 2014

The accidents of coal mine can be prevented by managing the coal mine near miss efficiently. In this paper, the cause of near miss of coal mine is investigated based on literature review and field survey. The relationship between safety climate and near miss of coal mine is analyzed. The statistical analysis of survey data is done by using the software SPSS16.0 and AMOS7.0. The results indicate that the coal mine safety climate affects employee’s safety behavior and employee’s safety behavior directly affect coal mine near miss. Among them, the influences of the safety communication and safety consciousness of employee on safety behavior are most significant. Coal mining enterprises should improve safety communication skills and safety consciousness of staff by the various means and methods to reduce the occurrence of unsafe behavior, so as to prevent the near miss of coal mine.
Establishment and Research on Mine 3D Visualization of Digital Geological Platform
Authors: Yang Fan , Zhang Zi Wen , Guo Zheng Yi , Shao Yang
Published: June 2014

In view of visualization about coalmine safety production,this thesis gives a detailed of the establishment process about mine 3D geological platform and researches secondary development of CAD technology,ADO technology,ActiveX technology,VC technology, SQL \ ACCESS database technology,technology of ACIS geometric modeling and inverse distance weighted method improved, and uses theory and technology above to establishes a set of complete and geological generalization which has early warning function of 3D visualization transparent platform.
Experimental Study on the Characteristics of Aeolian Sand Paste-Like Stowing Material in Coal Mine
Authors: Sun Kai Hua , Zhang Rui
Published: June 2014

In order to reduce the cost of stowing materials in Yuyang coal mine, and localize the stowing material, a series of experiments were conducted, which were based on the sampling and testing of aeolian sand to analyze the reaction mechanism of paste-like stowing slurry. The influence of different aeolian sand and auxiliary material content on stowing material was also studied in the experiment. Experimental results indicate that the main components of aeolian sand are SiO2 and Al2O3. The stowing material density increases by 23.4% with more aeolian sand additive amount, and the material cost falls to 93 yuan/m3, reduced by 25.6%. With the increase of auxiliary gelatinization material dosage, the 28-day strength of material increases by 59.4%, the hardening rate of stowing material reaches up to 109.5%, increased by 23%, and the stowing material shows micro expansion.
Fuzzy Comprehensive Evaluation of Open-Pit Slope Stability
Authors: Feng Shao Jie , Yao Ai Min , Dong Yan Fei
Published: June 2014

According to the stability of open-pit slope, the main influence factors of the slope stability is analyzed firstly. Then, based on the basic principle and method of fuzzy mathematics, the slope stability analysis of fuzzy and comprehensive evaluation further more model is established and the grading index of the slope stability is determined. Finally, by analyzing an example of large open-pit mine slope engineering, the stability of the slope is evaluated. The results show that the evaluation model could consider the uncertain properties in actual slope problems,and the evaluation result is reasonable.
Grout and Anchor Coupling Support in Dynamic Pressure Impact Roadway with Large Deformation in Deep
Authors: Li Wen Zhou
Published: June 2014

The broken characters of roadway in deep in China were statistical analyzed. Taking unit length anchor body as studying element, interrelations of the maximum shear force max、cementation strength and confining pressures were analyzed, researched and development grouting cable, put forward grouting-anchor coupling support for surrounding rock control in deep. The relation between different water cement ratios (0.5:1-1:1), different grout pressures (0.5:1-1:1) and diffusion radius were analyzed by means of numerical software UDEC. The surrounding rock controlling problems of dynamic pressure impact and large deformation roadway in deep was solved in CHANGCUN mine of Lu’an coal mining area in China.
Dynamic Prediction Model of Mining Subsidence Based on Cellular Automata
Authors: Sun Xue Yang , Xia Yu Cheng
Published: June 2014

Cellular Automata is a discrete dynamic model based on space-time, and is one of the effective methods to study complex systems. The CA, a new method applied to coal mining subsidence dynamic evolution model, provide a new idea for the prediction research of mining subsidence. Definition and basic theory of CA were introduced briefly. According to the particularity of the research in the field of mining subsidence, the definition of CA is extended. The model of dynamic evolution of mining subsidence is built on the CA. Then modeling method and the structure of model are elaborated, and the advantages of the CA are applied to coal mining subsidence prediction model is analyzed.
Research on the Slope Sliding Mechanism of Excavation of Steeply Inclined Mine from Open-Pit to Underground
Authors: Feng Shao Jie , Zhao Xue Fang , Sun Shi Guo
Published: June 2014

The stress of slope is in dynamic changes from open-pit to underground of the mining excavation . In this article, based on the relationship of space corresponding through the two mining methods, and two types of mining influence dominated overprint and containing characteristics, it can find out its regularity according to the numerical simulation, and also can reveal the induced with mutual interference between two excavation system mechanism, deformation of foundation and its numerical size out of dangerous area from the mining effect of interaction and mutual superposition characteristics; On this basis, it also analyzes its influence on the stability of the slope characteristics and deformation law, and puts forward to the control methods which provide the decisions basis for the mining safety production.
Application of Multiple-Point Geostatistics in Sedimentary Facies Modeling
Authors: Li Hong Dong , Hu Xiao Ling , Li Shao Hua
Published: June 2014

Compared with 2-point variogram-based geostatistics, multiple-points geostatistics is able to delineate reservoirs of complex spatial architecture or geometries more accurately. Multiple-point geostatistics stochastic simulation is introduced to apply on delta reservoir modeling by taking 2Sa block in a certain oil field at BeiBuWan basin for example. At first, the training image of 2Sa block deposited in delta frontier of study area is established by digitizing sedimentary facies and then facies model of 2Sa block is created with the method of multiple-point geostatistics. The result indicates that facies model simulate the sedimentary microfacies space distribution as well as distribution law of sandbodies, which provides a guiding significance for predicting the distribution of effective sand-body in the study area.
Testing Research on the Shape of the Bearing Push-Extend Reamed Affecting the Bearing Capability of the Pile of Push-Extend Multi-Under-Reamed Pile
Authors: Qian Yong Mei , Shan Long Jie , Xu Guang Han
Published: June 2014

As the shape of the bearing push-extend reamed can influence failure modes of the soil around the pile and below the disk, this paper, through experimental research that different shapes of the bearing push-extend reamed have influence on the capacity of the single push-extend Multi-under-reamed pile under the same loads, provides a reliable basis for further ascertaining the capacity of the push-extend Multi-under-reamed pile with the theory of sliding line.
The Airflow Abnormal Value Analysis of Mine Ventilation Network Based on the Sensitivity
Authors: Wang Yu
Published: June 2014

Based on the analysis of network theory and the airflow abnormal value of mine ventilation, the concept of sensitivity was introduced and a mathematical model to analyze the reason for the airflow abnormal values so as to realize the analysis for the airflow in all kinds of tunnels of ventilation system was put forward. By doing that, various reasons for the airflow abnormal value could be found so that possible predictions for the safety consequences could be made accordingly.
Analysis of Adsorbed Methane Gas Structure and Mullikan Charges
Authors: Yang Hua Ping , Li Ming
Published: June 2014

The methane molecule model, the coal molecule model and the absorption model of coal and methane have been thoroughly investigated using the DFT method,Van der Walls force radius as boundary conditions as well. The investigations focuses on optimizing the three types of model structure. Meanwhile, adsorption equilibrium geometries with 6-311G++ basic sets have been established. Through the model analysis of the changes in the structure and Millikan charge from free state to the adsorption states, the results indicate that the adsorption process of methane gas on the coal in the Van der Walls force mainly dispersion forces and induction force, methane molecules are polarized in the adsorption process, the electric dipole moment.
Analysis of near Miss Reporting will in China Coal Mines: An Empirical Study
Authors: Tian Shui Cheng , Kou Meng , Sun Qing Lan , Li Lei
Published: June 2014

The use of data from near misses in safety management has been identified as an important practice in the prevention of accidents. In this paper, the factors of impacting near misses reporting in China coal mine are investigated based on literature review and questionnaire survey. The influence effect sequence is: no number requirement, manager’s attitude to reporting , lack of feedback and follow-up, fear of social sanction, fear of punished, difficult to identify near misses, complicated reporting procedures, psychological factors. Work (setting formal goal for number of report, motivate miners to report, give feedback on report, development a no blame culture, training miners, etc.) has to be done continuously in order to get benefits from the near miss reporting system in coal mine.
Application Research of Belt Conveyor Remote Maintenance Based on Cloud Computing
Authors: Zheng Mao Quan , Hou Yuan Bin
Published: June 2014

In the coal production, coal belt conveyor as an important device to play a very important role, once the belt is abnormal, it is bound to affect the entire coal mine production safety. Article summarized the application of daily maintenance of belt conveyor under cloud computing environment, and introduces several kinds of common problem solving methods, to optimize the coal mine enterprise safety and stability of the belt conveyor equipment.
Elements Spatial Distribution and Ore Prospecting of the No.II Porphyry Copper - Gold Deposit in the Xiongcun District, Tibet
Authors: Lang Xing Hai , Tang Ju Xing , Xie Fu Wei
Published: June 2014

Xiongcun district is located in the western segment of the Gangdese porphyry copper belt, Tibet. Exploration activities in the No.I, No.II and No.III deposits in the past decade suggest that it would be a large prospective for porphyry copper-gold resources. In this paper, we focus on the systematical research of the elements spatial distribution of the No.II porphyry copper-gold deposit in the Xiongcun district. The results show, from center to the outer parts of the orebody, the elements distribution can be divided into Cu, Au, Ag, K, Mo and Ba → Co, Ni and Mn → Na and Ca → Pb, Zn, Cd, Bi, Sb and As. The No.II deposit is still open down-dip to the north and along the NW-striking, it need to conduct additional exploration.
Engineering Application of the Slope Failure Criterion
Authors: Fei Wei Shui , Zhang Cong Ling , Shen Peng Xiang
Published: June 2014

Abstract: The nouniformity of rock and soil materials and differences of boundary conditions caused the differentiation of stress field, together with the elastic-plastic characteristics of sliding zone material control the progressive unstable failure process. In this paper, The analysis of engineering example shows that the mechanical criterion is reasonable to judge the state of progressive slope evolution.
Research on Allowable Deformation of Highway Influenced by Coal Mining Subsidence
Authors: Deng Wei Nan
Published: June 2014

The paper put forward allowable deformation of highway is the premise of the study on problems of highway influenced by coal mining subsidence. Base on the analysis of correlative regulations and highway characteristics, the research pointed out a certain deformation value is not suitable for judging the safety of highway influenced by coal mining subsidence and the criterion of allowable deformation with considering the structure and the material of highway must be established. Using curvature as the allowable deformation index, The paper derived the criterion formula of the allowable deformation of highway and calculated the allowable deformation interval of common highway in China. The achievement is useful for solving correlative problems in the future.
Determination of Chemical Composition, Nutritional Ingredients and Bioactive Compounds of Three Cultivars of Mango Seeds
Authors: Li Ji Hua , Huang Xiao Bing , Peng Shao Dan , Jing Wei , Lin Li Jing
Published: June 2014

Three principal mango cultivars (Yuexi No.1, Tainong No.1 and Guifei) grown in Guangdong province in China were selected, and their chemical composition, nutritional ingredients including fatty acid and amino acid, and bioactive compounds such as phenolics and flavonoids were characterized and compared. The results showed the mango seeds had high moisture content (64.74-71.84%) and crude fibre content (50.86-60.62%), and the seeds of Yuexi No.1 had the lowest content of protein (1.21%), total lipid (1.47%), total sugar (2.79%), and highest content of Ca (537.02 mg/100 g), Na (22.60 mg/100 g), Zn (6.13 mg/100 g), Fe (17.02 mg/100 g) compared with the other two cultivars. The total amino acid (AA) in Guifei seeds (4.33%) was the highest, but the proportion of essential AA was the lowest. Seven fatty acid compounds were found in the three varieties. Moreover, Tainong No.1 had highest content of total phenolics (10.82%) followed with Guifei (1.86%) and Yuexi No.1 (1.06%), while the flavonoid content of Tainong No.1 was 2.71%, higher than Yuexi No.1 (0.37%) and Guifei (0.70%).
Fatty Acid Analysis of Edible Oils
Authors: Yu Feng Xiang , Chen Xu , Chen Zu Wu , Wei Xiao Jun
Published: June 2014

To research the characteristics of rice bran oil ( RBO) and identify RBO from vegetable oils,33 kinds of rice were collected from China, the fatty acids of rice bran oil, palm oil, rapeseed oil, cottonseed oil, soybean oil, peanut oil, camellia oleosa seed oil were analyzed by Gas Chromatography, the contents were determinated by area normalization method. Fingerprint of RBO is bulid, the similarity of chromatographic fingerprint (SCF) is over 0.998, means that different RBO have the same fatty acid gas chromatographic fingerprint feature. The composition and content are different in the 7 vegetable oils ,that contribute to determinate the adulteration of inexpensive oils to RBO based on SCF. Main fatty acids in peanut oil are palmitic acid, oleic acid, linoleic acid. The characteristic fatty acid is behenic acid C22:0. Main fatty acids in soybean oil are palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid. Proportion of C18:3 is much higher than in RBO when C18:1 is lower obviously. Main fatty acids in cottonseed oil are palmitic acid, oleic acid, linoleic acid. Proportion of C16:0 is much higher than in RBO and C18:1 lower . Main fatty acids in palm oil are palmitic acid, stearic acid, oleic acid, linoleic acid. Decanoic acid C10:0 is one of the characteristic fatty acids ,and C16:0 is much higher than in RBO. Main fatty acids in rapeseed oil are palmitic acid, oleic acid, linoleic acid, linolenic acid, arachidonic acid, erucic acid.C22:1 is the characteristic fatty acid when little or zero in other oils. Main fatty acids in camellia oleosa seed oil are palmitic acid, oleic acid, linoleic acid.C18:1 is much higher than RBO.
Stability of Carotenoids in Russula alutacea Fr. Extraction
Authors: Zhao Yan , Yang Qing Song , Zhou Qiang , Lu Zhi Min , Fan Ru Yan
Published: June 2014

In order to survey the stability of carotenoids in Russula alutacea extraction. The survival rate of total carotenoid content in extract was determined under different conditions, including different light, temperature, metal ions, different pH solution, oxidizing and reducing agents. The results showed that all of these conditions could affect the stability of carotenoids in the extraction. The carotenoids were sensitive to sunlight and degraded rapidly in direct sunlight. The carotenoids had a greater loss with the increasing temperature. Acid environment may cause the carotenoids loss, but the carotenoids were relatively stable under alkaline environment. While zinc and ferric ions (Zn2+, Fe2+ and Fe3+), especially Fe3+, could obviously destroy carotenoids. In all, the reducing agent had certain protective effect on the stability of carotenoids. So when using or saving the carotenoids, it was necessary to be dark, low temperature and neutral condition, and avoided using copper and ferric ware. The results will provide a scientific basis for the development and utilization of carotenoids from R. alutacea in Yunnan.
The Effect of Mesona blumes Gum on the Quality and Staling of Wheat Bread
Authors: Liu Ming , Feng Tao
Published: June 2014

As a hydrophilic polysaccharide, MesonaBlumes gum (MBG) -enables to improve the quality and retard the staling of breads. The purpose of this work was to evaluate the effect of MBG on the enhancement of the quality and the staling of wheat breads. The bakery samples were stored in a polyethylene bag for 1, 2, 3, and 4 days at 25oC. Our findings indicated that MBG can improve the parameters such as width/height ratio, specific volume and moisture content of wheat breads. The texture profiles (hardness, cohesiveness, springing, chewiness) were measured through texture profile analysis (TPA). The results of differential scanning calorimetry (DSC) and TPA revealed that MBG can retard bread staling, further prolonging its shelf life. The microstructure of bread was analyzed by the scanning electron microscopy (SEM), illustrating that MBG have the ability to enhance the gelatinization of starch with a dense, uniform and small size pore texture.
Based on the Pore Network Model of CO2-Water-Quartz System Two-Phase Flow Characteristics Study
Authors: Chen Ling Yu , Liu Yu , Mutailipu Meiheriayi
Published: June 2014

Saline aquifer storage is considered to be one of the main ways to realize CO2 geological sequestration. The purpose of the paper is to research CO2 and water seepage characteristics under the condition of different pressure and diameter of glass sand. First, establish four kinds of sand packed beds pore network model. Secondly, measuring the gas-liquid interfacial tension, contact angle under the condition of 50°C and different pressure (5-20MPa). Finally, using the two-phase flow model, obtain the gas-liquid two-phase relative permeability curves under different conditions. The simulation results of this paper can help to predict the actual saline aquifer storage of CO2 sequestration.
Calculation and Evaluation Methodology of Transport Energy Consumption and Carbon Emissions: A Case Study of Jiangsu Province
Authors: Ouyang Bin , Feng Zhen Hua , Bi Qing Hua
Published: June 2014

The calculation methodology of transport carbon emissions, based on the methodology recommended by Intergovernmental Panel on Climate Change (IPCC) and the energy consumption statistics of provincial transport industry in China, is proposed. By using the methodology, the energy consumption and carbon emissions of highway, waterway and urban passenger transport from 2005 to 2012 of Jiangsu Province are calculated and evaluated. And the developing trends and main features from the perspectives of the total amount of transport energy consumption and carbon emissions, the proportional of both various energy types and various transport modes in the energy consumption, the energy intensity and carbon dioxide intensity, are systematically analyzed. Finally, some policy implications of low-carbon transport development were conclusively put forward, including reducing energy intensity and carbon intensity as the core focus, the highway transport as the breakthrough point, optimizing the integrated transport system structure and developing of public transport in priority as the strategic orientation, developing clean and low-carbon energy as an important way, etc. The research methodology and results can provide references for decision-making and management of the relevant provinces and cities on low-carbon transport development.
Drawing Experiences from California to Perfect Shenzhen GHG Emissions Trading System
Authors: Zhu Xiao Qin , Chen Zhen
Published: June 2014

This paper firstly describes the preliminary achievements of Shenzhen GHG emissions trading system, analyzes some of the issues occurred during practice, and then draws from some experiences of the California model, forwards a number of recommendations to perfect the Shenzhen GHG trading system.
Estimating Carbon Emission of Tourism Transportation and Accommodation in China
Authors: Yang Zhong Hong , Yang Yang , Chen Xiao Hui
Published: June 2014

The tourism’s growing consumption of energy, especially in transportation and accommodation, and its great demand on fossil fuels has important implications for GHG emissions. From the perspective of low carbon and emission reduction, the paper discussed the carbon emission of China’s tourism. Based on the previous studies, the paper calculated carbon emission of 31 Chinese provinces from tourism transportation and accommodation. The results show that: 1) Tourism transportation contributes most to carbon emission, accounting for 89.4% of the total, while tourism accommodation accounts for 10.6%. 2) In terms of transportation, civil aviation contributes most, accounting for 44.71% of the carbon emission of tourism transportation. 3) In terms of accommodation, three-star hotels contribute most, accounting for 45.3% of the carbon emission of tourism accommodation. 4) Cities of Guangzhou, Beijing and Shanghai make the largest contribution to the carbon emission among 31 provinces. Based on the above, it is reasonable that Tourism Sectors should make targeted policies to promote the development of low-carbon tourism according to the structure of tourism transportation and accommodation.
Impact of Tropical Cyclones to Economic Development and Corresponding Measures for Disaster Reduction in China
Authors: Wang Hui Zhi , Xu He
Published: June 2014

China is one of the countries which suffer the damage from Tropical cyclones most severely. Tropical cyclones catastrophe causes tremendous loss of life and great majority of damage to China every year. Because of the economic influence of Tropical cyclones catastrophe, the defense of Tropical cyclones becomes an important issue. This paper first analyzed the Tropical cyclones characteristic in China, then we discussed relationship between economic losses and Tropical cyclones, and finally we tried to present some feasible suggestions for the construction of a recovery system for Tropical cyclones from the three phases, including disaster defense and reduction system, disaster crisis management, and disaster loss evaluation and compensation system.
Managing Clear-Cutting Forest for Carbon Sequestration in Living Biomass: A Case Study in Subtropical of China
Authors: Lin Kai Miao , Yang Zhi Jie , Yang Yu Sheng
Published: June 2014

Forest reconstruction was regarded as a measure of carbon sequestration and climate change mitigation. The carbon stocks in living biomass were compared between artificial measures promoting regeneration ofCastanopsis carlesii(ARC) and two adjacent plantations ofCunninghamia lanceolata(CFP) andPinus massoniana(PMP) and natural primary forest (NPF). The mean carbon stocks were about 150.1 Mg ha-1in ARC and 90.6 Mg ha-1in CFP and 83.9 Mg ha-1in PMP. The results primarily showed that the carbon stock in artificial measures promoting regeneration were higher than that two plantations. Carbon stocks in the all reconstruction of forests were all significantly lower than those of NPF (186.9 Mg ha-1), which also implies they still have a carbon sink increment potential.
Carbon Emission Calculation of Thermal Power Plant - An Overview
Authors: Liu Rui , Zhai Xiang Bin , Chua Veronica
Published: June 2014

Thermal power industry is one of the six biggest carbon emissions industries in China. Researchers did innumerable studies in reducing carbon emissions of thermal power plants (TPP). However, most studies are focused on the calculation and prediction of China's total carbon emissions, while few studies are focused on specific TPP carbon emissions. There are 3 parts in developing this paper; first, the main ideas of the project life cycle’s calculation methods, construction periods and operation periods are summarized. Secondly, Intergovernmental Panel on Climate Change (IPCC) carbon emission factor mode, practical measurement mode, mass conservation mode and quantifying mode are discussed in detail. This paper aims to determine the optimal development path for thermal plants through the detailed discussion of the existing research results of a specific TPP project’s carbon emissions issue.
The Potential Estimation for CO2 Saline Aquifer Storage in Chinese Main Basins
Authors: Li Duo , Song Yong Chen , Zhang Yi
Published: June 2014

CO2 saline aquifer storage has large potentials, which is one of the promising options for mitigating carbon dioxide emissions into the atmosphere. Chinese storage potential assessment is in its infancy. This paper reviews the research of the storage potential evaluation in China. Based on the two mechanisms of structure trapping and solubility trapping, the formula is analyzed and obtained to calculate the storage potential. We select 23 main continental basins and 9 main sea basins in China, then calculate that saline aquifer storage potential is 1914.79 Gt in Chinese main basins, among which the continental storage potential is 1341.07 Gt and the off-shore storage potential is 573.72 Gt. This research provides basic data for the implementation of the saline aquifer storage in China.