bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulation of Mass Transfer in Anode Flow Field of a Passive Direct Methanol Fuel Cell
Authors: Shang Hui Hui , Ye Fang , Xue Yan Qing , Guo Hang , Ma Chong Fang
Published: March 2015

A three-dimensional model for anode side of a passive direct methanol fuel cell with perforated flow field was developed to investigate the mass transfer in anode flow channels. The model simulated the transient two-phase flow in channels. With this model, the distribution of methanol concentration and carbon dioxide volume fraction in channels was presented. The variation of species on the central surface of flow channels was also gained. Simulation results show that the mass transfer in anode flow field of passive direct methonal fuel cells is affected by comprehensive effects of diffusion and convection. The results also indicate that the methanol transfer in channels is influenced by the carbon dioxide.
The Study of Kalman Filtering Algorithm in the Initial Alignment of Strapdown Inertial Navigation System
Authors: An Shi Qi , Zhang Jun Kai
Published: March 2015

According to the principle and the method of initial alignment of strapdown inertial navigation system, proposed based on Sage-Husa adaptive kalman filter algorithm. The measured simulation data, compared with those of kalman filtering algorithm, show that the optimized algorithm can optimize the noise estimation, revise accumulated error of strapdown inertial navigation system, and greatly improve the navigation accuracy.
An Overview and Analysis of Electronic Stabilization for Cameras on Moving Vehicles
Authors: Zhu Juan Juan , Zheng Wen Ling , Guo Bao Long
Published: March 2015

Electronic image stabilization (EIS) is the technology which detects and removes camera jitter in image sequences by digital image processing methods. It has been widely used in moving vehicles such as airborne, shipboard and vehicle-mounted camera systems. This paper firstly introduces the basic principle and structure of EIS system. Then the key techniques for each module are introduced and compared in processing speed and application scenes. The motion estimation method based on feature points is emphatically analyzed. Some experimental simulations and further discussion are made on the existing motion filtering and compensation methods. We also summarize the evaluation criteria for EIS performance. Finally the future research trend of EIS system is presented.
Brief Survey of K-Means Clustering Algorithms
Authors: Liu Hui Ming , Lu Jin Grong
Published: March 2015

K-means is one of the most widely used algorithms for clustering. Ease of implementation, efficiency, simplicity, and empirical success are the main reasons for its popularity. In actual application, there are some defects in traditional k-means, for example, the value of K need to be specified ahead, initial clustering center is a random choice and so on; this influences the performance of the K-means. In order to overcome these obstacles, many variants of K-means algorithm have appeared. We provide a brief overview of k-means, point out existing problems; summarize major improvements in the determination of clusters number, the initialization of the cluster, the similarity measurement, the sensitivity of noise and outliers and so on. Further study directions of K-means are pointed at last.
Cataclysmic Variable Star Spectra Data Mining Engineering in SDSS Archive
Authors: Wang Wen Yu , Wang Xin Jun , Wang Wei , Pan Jing Chang
Published: March 2015

We present an automatic method to identify cataclysmic variable stars (CVs) in the ninth data release of the Sloan digital sky survey (SDSS). The data mining technique is employed and the massive spectra are identified quickly and efficiently. The high dimensional spectra are mapped to feature space constructed by the principal component analysis (PCA), and dimensionality reduction is carried out accordingly. Massive SDSS spectra are classified by the support vector machine (SVM) and most of the non-candidates are excluded. The final greatly reduced candidates can be identified manually and easily. Experiments show that this data mining method can find CVs from the SDSS database in an effective and efficient manner. In addition, this method is also applicable to mining other special celestial objects in sky survey telescope data. We report the identification of a new CV with spectra. The newly found CV enriches the CVs spectral library and will be useful to the research of binary evolution models.
Combination of SVD and Wavelet Transform for Oil Discrimination on 3-D Fluorescence Spectra
Authors: Tian Guang Jun , Yang Lu Lu , Yang Zi Chen
Published: March 2015

Singular Value Decomposition used in spectrum feature extraction, often discards small component that may be important for identifying mineral oil products. This work presents a new method using the Singular Value Division (SVD) on Wavelet Transform (WT) with three-dimensional fluorescence spectra as the source of oil features. WT-SVD feature based fuzzy classification (FCM) is implemented and comparable or better results are yielded in more accurate, and more robust than SVD performance under random noise conditions. The result means that WT-SVD method can strike a balance between data compression and preservation of small valid information in feature extraction of three-dimensional fluorescence spectra of mineral oils. This method is conducive to oil discrimination and pollution analysis in water environment monitoring.
Impact Localization System by Using FBG Sensors and Extreme Learning Machine Algorithm
Authors: Jiang Ming Shun , Li Xiang Yang , Wang Shi Cheng , Lu Shi Zeng , Qing Yin , Shu De Hua , Yuan Yuan Ming , Zhao Yu Lei , Sui Qing Mei
Published: March 2015

Aluminum alloy structure impact localization system by using fiber Bragg grating (FBG) sensors and impact localization algorithm were investigated. The impact localization method was proposed based on Extreme Learning Machine (ELM). Cross-correlation analysis method was used to extract the impact signal time difference. And ELM was used to realize impact localization. ELM model’s input was signal time difference and the output was the impact location. At last, FBG impact localization system was established. In aluminum alloy plate’s 500mm*500mm*2mm experiment area, the FBG impact localization system was used to identify the impact location. The experimental results showed that the impact location abscissa and ordinate localization errors were both less than 10mm. The research results provided an alternative method for the aluminum alloy material structure impact localization.
Recognition of Working Condition in Cement Rotary Kiln Based on Generalized Dimensions
Authors: Zhao Hui , Liu Jian , Wang Hong Jun
Published: March 2015

There has been a tight correlation between the change of the cement rotary kiln carrent and operation conditions, such as the kiln thermal condition, the thickness of the crust, the kiln tyre collapse and so on. Considering the different fractal characteristics that cement rotary kiln current signal exhibit in different conditions, this paper has study on the generalized fractal dimension of kiln current signal under different working conditions as the characteristic parameter. The levels and trends of rotary kiln current and working condition will be identified by computing the maximum correlation coefficient according to the generalized fractal dimension of detected signal and of cement rotary kiln current under different working condition.
Research of the PCB Quality Detection for IC Mount Base on the Digital Image Recognition
Authors: Ren Hao , Sun Jie , Li Yue Feng
Published: March 2015

A detection method is given in this paper for the automatic surface solder printing quality detection during the automatic welding on PCB. The method of variable metric is used in the processing of the target positioning and the target recognition is used based on the machine vision. The method given here can greatly improve the processing speed in real. The processing of the rotating angle axis positioning theory is mentioned and the verification is done by experiment. This method has the advantage of high accuracy, small detection error and easy to operate.
Contact between Logarithmic Crowned Teeth of Spur Gear Transmission
Authors: Jin Ting Ting , Wang Jiu Gen , Jin Shou Song , Wang Zhen Rong
Published: March 2015

Gear tooth modification such as lead crowning can reduce stress concentration at the edges of the gear teeth; therefore prolong the fatigue life of gears. A logarithmical lead profile was applied on spur gears and the surface coordinate equation of logarithmic crowned tooth for manufacturing was established. On the basis of the contact mechanics model, the deformation equation of compatibility and load equilibrium equation were solved with an iterative numerical algorithm, and the corresponding programs were developed in Matlab to calculate the distributions of contact stress and von Mises stress field inside the subsurface layer at any meshing position. The numerical results of some typical examples show that the level of stress concentration before modification changes with the engaging locations of the gear teeth, and so does the amount of logarithmic modification along the line of contact, which can completely eliminate the edge effects of tooth surface at every meshing position during the spur gear transmission process, and thus improves the fatigue resistance of gear teeth surfaces.
Research on the Technique of Blind Recognition for Convolutional Code
Authors: Sun Yong Wei , Zhang Li Min , Fan Xiao Lei
Published: March 2015

As to the problem of blind recognition for convolutional code, the existing recognitory methods’ principle and process are summarized, and they are simulated and analyzed with Matlab. Four methods are introduced for the recognition of generation polynomials, and the comparison of these methods shows that the Euclidean algorithm works better at low BER, while the method based Walsh-Hadamard transform has a better accuracy when BER is as high as 10-2.
Study of Particle Swarm Inertia Weight Adjustment Method Based on Fitness Changes after Multi-Step Iteration
Authors: Zheng Shu Hui , Zhang Ling Yu
Published: March 2015

Considering the inertia weight adjustment problems in the standard particle swarm optimization algorithm, a kind of particle swarm inertia weight adjustment method based on multi-step iteration fitness changes was put forward, and by analyzing if particle optimal fitness values was further optimized after a certain number of iterations, then how to set the inertia weight was determined, which can balance the particle swarm global optimization and local optimization. Simulation results show that the improved algorithm was better than the standard particle swarm optimization algorithm in convergence speed and accuracy of solution.
Study on Matching of Image Topology Structure and Application
Authors: Zhao Wen Cang , Wang Xiao Xiao , Qi Dan
Published: March 2015

Image matching is a very important field of computer vision and image processing. In this paper we proposed a topology model and algorithm based on characteristic points. Firstly, detecting edge and points feature, then making topology model and proving the excellent properties of the model. Finally, using the proposed model in image mosaicking, at last the feasibility of the model and algorithm are confirmed.
The Dynamic Multi-Angle Video Capture System Study Based on Glass-Free 3D
Authors: Fu Yong Hua
Published: March 2015

The paper implements a dynamic system for multi-angle glass-free 3D video, the technology for playing content acquisition have higher requirements. The system using the camera matrix, gathering content for multi-angle shooting, and then after decoding, correction, synthesis, processing changes have sustained multiple angles of video images, in order to achieve the Glass-Free 3D viewing . System uses Java to achieve the driver. As the experimental results shows that the camera capturing problems like distortion and image alignment are solved and the dynamic full HD video with four view angles realized.
Testing System Reliability with Exponential Distribution Testing System Reliability
Authors: Mu Wei Yan , Chen Jian Jie , Zhang Li Ping
Published: March 2015

In this article, we study inferences for reliability functions of the system having two components connected parallel. Suppose that the lifetime of two components have exponential distribution. Using the generalized inference approach, we obtain confidence intervals of our interested parameters with good coverage.
4D Approaching Trajectory Design in Terminal Area Based on Radar Data
Authors: Xie An Min , Cheng Peng
Published: March 2015

The terminal area is always a hot research topic by aviation experts all over the world. As the rapid growth of the demand of air transportation, the terminal area becomes busier than ever. The results are flight delays and cancellations. One of the solutions is to design a 4D trajectory for each flight. Under the four dimensional operation, the flights can fly more precisely and be arranged more closely so that the terminal area can hold more aircrafts. With the development of the technology of communication, navigation and surveillance, the flight of four-dimensional operation is possible. This paper presents a data-based method of 4D approach trajectory design in terminal area.
Method of Suppressing Noise AM Jamming with EMD for Combined Modulation Radio Ranging System
Authors: Hao Xin Hong , Chen Hui Ling , Yue Kai , Xun Yang
Published: March 2015

In this paper, aimed at suppressing the noise amplitude modulation jamming for a novel combined modulation radio ranging system, which transmits the waves combining pseudo random binary phase code (PRBPC) with linear frequency modulation (LFM), a signal processing method based on the empirical mode decomposition (EMD) and reconstruction of the target correlation peak signal is presented. Firstly, the correlation detection output signal of the ranging system is theoretically derived and proved to meet the condition of the Intrinsic Mode Function (IMF). Then the EMD processing for the target correlation peak signal, completely covered by the noise amplitude modulation (AM) jamming, is done and decomposes the signal into several IMFs. The difference of certain main IMF between the target signal and the strong jamming is utilized to reconstruct the target correlation function as the input signal of the detecting part. It is proved by simulation that the processing gain to the noise AM jamming can be significantly improved and the main lobe of the reconstructed correlation peak signal is more obvious, therefore it can be more easily identified.
The Solutions for a Kind of Engineering Equation
Authors: Fu You Liang , Zhang Da Hang
Published: March 2015

A class of shallow water waves equations are studied in this paper. Using Kato's existence theorem, we mainly study the initial and bounded value problem for the quasi-linear evolution equations. Meanwhile, we prove the existence of local and global existence of solutions to the equations.
An Inclusion Measure between Fuzzy Sets
Authors: Wang Jing , Zheng Gao
Published: March 2015

The inclusion measure is an important index of fuzzy logic because of its wide application. This paper aims to put forward a new fuzzy inclusion measure. Based on the previous related research results, an axiomatic definition with three axioms is first chosen for the purpose of making the fuzzy inclusion measure in the true spirit of fuzzy logic. A calculation formula is built under the constraints of the chosen definition, that is to say that the calculation formula is consistent with the three axioms. Two properties are discussed. Finally, two examples are used to verify the rationality of the new inclusion measure between fuzzy sets.
Application Study of Efficient Modulation Technique to DVB-RCS Based Aeronautical Satellite High Data Rates Transmission System
Authors: Li Zuo Kun , Pan Ya Han , Shang Bin
Published: March 2015

This paper mainly studies the application of the efficient modulation technique to DVB-RCS based aeronautical satellite high data rates transmission system, and also presents the key issues of this new modulation technique used in aeronautical satellite environment. Study shows that the new efficient satellite modulation technology can meet the changing needs of today's aeronautical satellite high data rates transmission providers and achieve the targets of providing higher data rates for usage at existing same bandwidth.
Design of Task Workflow Based on Activiti Technology
Authors: Yang Shu Lin , Hu Jie Ping
Published: March 2015

This paper introduced the workflow concept, analysis of the Activiti5 open source workflow management system architecture. And from a practical point of view, to training system task workflow as an example, a detailed analysis of the design scheme of task workflow. The scheme in the practice application received good results in the training system.
Reconfigurable Antenna Beamforming in Device to Device Communication
Authors: Shen Qing , Guo Tian Tian , Du Yao Zhi
Published: March 2015

Device-to-Device (D2D) communication allows user devices in proximity to directly communicate with each other through reusing resources in cellular communication system. D2D improves the system capacity while it also raises some challenges on interference. This paper adopts reconfigurable antenna in D2D communication generating directional signal transmission between D2D pairs which mitigates the interference to other users. The simulations show that such scheme improve the system capacity compared to the traditional one.
An Adapted Intra and Inter Prediction Algorithm for H.264
Authors: Wang Yue Yue , Cui Yu Bin
Published: March 2015

An adapted prediction algorithm for H.264 is proposed in this paper. For I frames, a new intra algorithm is proposed in which a novel Intra_4×4 mode selection method is designed. Nine Intra_4×4 modes are divided into three classes, the suitable mode class for current 4×4-block is predicted using the mode classes of neighboring left and up blocks. For inter frames, a new inter prediction algorithm is proposed, and two matrixes which are composed of sum of absolute values of the integer transform coefficients in 4×4-residual-block contained in luminance 16×16-block and 8×8-block are defined respectively, the novel MB and sub-MB mode selection criteria which use the derived gradients of the two matrixes are then proposed.
Research of Energy Optimization Strategy for WSN
Authors: Gao Zhan , Huang Lin Mao
Published: March 2015

The energy of the nodes in wireless sensor network is very limited. Power supply module power supply, not only need to give themselves also need to collect data of the sensor power supply, monitoring data sending and receiving, processing, also need to consume energy. If the node due to run out of battery and enter a state of "death", can cause the node collection data loss; If the node is terminal nodes, only this node data loss; But if the node is routing nodes, not only can cause data loss of this node, also can cause by all nodes of the node for data transmission loss of data. So, the question of energy consumption becomes a research focus in the field. Through the architecture of wireless sensor network and the analysis of the wireless sensor network protocol stack, according to the characteristics of the wireless sensor network (WSN) and energy optimization strategy of background points out the necessity of energy optimization. By analyzing the energy consumption of wireless sensor network, the wireless sensor network energy optimization strategy is given.
Research on Design and Implementation of Automotive ECUs Software Remote Update
Authors: Zhang Ji , Liao Zhi , Zhu Ling
Published: March 2015

The automotive ECU, as a core component of automotive electronics, needs constant update to meet the performance requirements of the vehicle. Traditional methods, which rely on the professionals’ operations to update, cannot meet the development of vehicle network. The authors propose an automotive ECU remote update scheme in this paper. A remote download system that implements convenient and real-time automotive ECU updates is built in this paper. The system takes the mobile phone as an intermediary to communicate between the remote server and the onboard platform. Finally, the feasibility of the scheme is verified via experiments.
The Design of High Speed LVDS Parallel Port Communication Protocol
Authors: Zheng Lei , Yang Chen Xi , Liu Jia Kang
Published: March 2015

In the image display and control system, a high speed dissymmetrical point to point communication port and protocol between GENIC(Gigabit Ethernet Network Interface Card) and SDRAM based on LVDS (Low Voltage Differential signaling) and STOP-WAIT ARQ protocol are designed, while the port’s speed should not below 1Gbps. Five lines LVDS signal pairs are used in one direction, including one clock and four data in the port’s electrical connections. Double-edge sampling and source synchronizing are also used. Mode 256 checkout is used to guarantee the reliable data transmission. Analysis shows that the port’s bandwidth is 1.2Gbps, the efficiency of protocol is above 99% and the protocol works steadily and reliably.
Topic Detection Research Based on Multi-Models
Authors: Zhang Su Xian , Zhang Dong , Zhang Su Xiang , Zhao Bing Zhen , Xie Lin Yan
Published: March 2015

In this paper, a novel approach was proposed for the topic detection which combined the multi-models. We paid attention to the content similarity, time similarity and location similarity respectively, at the same time, the Bayesian model also was researched and the atomic characteristics words were extracted. Combined the expert knowledge and multi-models, the experiment was completed and the experimental results show that the approach is effective.
Application on Programming and Simulation of the Fan Blade NC Machining Based on UG
Authors: Gao Zhi Xian
Published: March 2015

CAM model of the fan blade based on UG NX software is introduced. The application of UG NX software in NC machining is stated. The machining techniques, tool path design and the simulation of the manufacturing process are analyzed in detail. Special postprocessor is developed for different NC systems. NC programs are generated by post processing files to effectively improve the efficiency of programming and machining
Detecting and Normalizing Formulas in Electronic Literature Resources
Authors: Xu Wei Xin , Tian Xue Dong , Li Xin Fu
Published: March 2015

Formulas exist in various kinds of documents with different formats. Extracting and normalizing them into a unique form are the precondition of mathematical retrieval. In this paper, an extraction and conversion method of formulas in Word documents is built for mathematical expression retrieval. Firstly, the mathematical expressions in Word documents are detected through the processing of OLE objects. Then, the matching rules of formula format conversion are defined. Finally, the extracted mathematical expressions in OMML format are converted into LaTeX format follow the defined rules and stored in a txt file. Furthermore, the formulas exist in MathType format are stored in bitmap documents and converted into LaTeX documents through formula recognition and reconstruction module. Experiments show the effectiveness of the designed approach.
Detecting Multi-Scale Community Structure in Complex Networks
Authors: Guo Yu Quan , Li Xiong Fei
Published: March 2015

Multiple-scale community of complex networks has attracted much attention. For the problem, previous methods can not investigate multiple-scale property of community. To address this, we propose a novel algorithm (h_LPA) to detect multiple-scale structure of community. The algorithm is a heuristic label propagation algorithm associated with spectral analysis of complex networks. Label updating strategy of h_LPA is combined with heuristic function from the perspective of networks dynamics. The heuristic function further improves the dynamic efficiency of h_LPA. Extensive tests on artificial networks and real world networks give excellent results.
A Combined Method for Spatial Join Selectivity Estimation
Authors: Lan Gui Wen , Chen Qi , Wu Cong Cong
Published: March 2015

Spatial join selectivity is one of most important and time-consuming operations in spatial databases. The method of Power Laws is one of proposed methods that can be applied to point datasets perfectly. This paper presents a method that combines the Power Laws with MP Histogram Statistic, to calculate spatial join selectivity of polyline feature data-sets, or polygon feature data-sets or more complex feature data-sets. The spatial join selectivity is calculated with the proposed method and compared with that of the MP Histogram Statistic, and the experimental results show that the proposed method is feasible.
Research on Analysis and Algorithm of Freeway Network
Authors: Gao Yi Dan
Published: March 2015

This dissertation studies the comprehensive evaluation system of freeway and the system includes the evaluation indexes of freeway network and economy. At the same time, on the base of introducing the development of freeway, this dissertation conducts a case study of the freeway to make a preliminary evaluation of development speed, scale and layout of the freeway, and also analyzes the space layout, efficiency of time and space of the traffic flow and saturation degree of sections of freeway. Given that above, this dissertation puts forward initiative measures.
Design and Implementation of Measurement Instrument for Non-Cylinder Pinhole of Piston
Authors: Zhang Kun , Zhang Hong Yang , Xiao Bo Han , Zhai Peng
Published: March 2015

For simplifying the cockamamie measurement process, in this paper, special equipment for measuring non-cylinder pinhole of piston is designed and implemented. First of all, the measuring principle, the hardware structure and the software system are illustrated. In addition, the measurement error is analyzed in detail. Finally, it is proved that the precision of the instrument is as high as that of the foreign advanced instrument.
A Conflict Detection Method for Runway Incursion
Authors: Wang Guo Qiang , Li Jing
Published: March 2015

The runway incursion detection algorithm (RIDA) was developed by CASRI in support of the National Science and Technology Pillar Program of China. Detection algorithm was developed as a component of the A-SMGCS, an experimental software system for terminal area and surface operations. The detection algorithm is the primary function for implementing A-SMGCS level II. The RIDA makes use of ADS-B surveillance technology, Global Positioning System (GPS), ground surveillance systems, and data links. The RIDA was tested and demonstrated at the Shuangliu International Airport (CTU) since 2012 with highly successful results. The advanced capabilities of RIDA provide ATC controllers with enhanced situational awareness, supplemental guidance cues, a real-time display of traffic information, and warnings of runway incursions in order to reduce the possibility of runway incursions while also improving operational capability.
Coal Transportation Network Optimization Model Based on Power Source Distribution
Authors: Wang Guan , Qin Chao , Huang Yan Li , Tan Zhong Fu
Published: March 2015

Coal is the important fuel and industrial raw materials in my country, and it accounts for 70% of total energy production and consumption in our country, and power plants’ coal consumption accounts for more than half of national total coal consumption. The research of electric-coal supply chain related to coal production place, coal transit place and consumption place (power plant). Due to there are many nodes like these three kinds coal transportation in the market, so the project that integrates every nodes into unified transportation optimization network has the function of reducing coal consumption and saving transportation costs. The paper constructs coal transportation analysis model, electric-coal supply and transportation path dynamic optimization model based on electric-coal transportation network analysis, and make effective analysis for choosing electric-coal transportation path. The paper also puts forward electric-coal supply chain optimization measures from electric-coal supply chain integration and ports building.
Analysis on the Development of China’s Environmental Logistics
Authors: Wu Chun You , Lan Lan , Ding Feng , Zhao Xu
Published: March 2015

Traditional logistics brings damages to the environment, such as climate change, air pollution, water pollution, etc. Environmental logistics concerned more about improving the environmental sustainability compared to the traditional one. We find that it will help China to optimize the whole logistics system and minimize the damages caused by transportation, storage. And thus China will make new progress in logistics management, environmental protection and sustainable development.
The Engineering Application of Improved Alternating Direction Method for Solving Power Systems Multi-Area Dispatch Problem
Authors: Ren Ya Ming , Fei Shu Min , Wei Hai Kun
Published: March 2015

The alternating direction method has been widespread used to solve multi-area economic dispatch problem. Compared with traditional centered economic dispatch, alternating direction method divides centered optimal problem into completely independent sub-problems while the corresponding equality and inequality constraints are satisfied. However, plenty of applications show that the choice of penalty parameter for the consistency constraint has an important influence on the convergence performance of alternating direction method. In this paper, we proposed a novel improved alternating direction method. To be more exact, the key is to adjust penalty parameter based on iterative information of alternating direction method. Numerical results illustrate the proposed method has better stability in convergence.
Resource Selection Method Process Based on Mechanisms of Tax in Grid Dependent Tasks Rescheduling
Authors: Meng Xiang Lai
Published: March 2015

Grid dependent tasks rescheduling problem currently are facing triggering frequent. Aiming at this problem, this paper introduces a simple based on Fault Index Based Rescheduling (FIBR). Then it put forward the improved method based on the tax mechanism successful index rescheduling method. Through the method, the grid system can accord the successful index value for task allocation relatively stable resources. At the same time, the method can make the most of the available resources are fully utilized, greatly reducing resource load imbalance situation, effectively improves the utilization of resources in history current stability judgment accuracy. The possibility of rescheduling trigger is reduced.
The Application of Random Forest in Finance
Authors: Zou Zhi Bin , Peng Hong , Luo Lin Kai
Published: March 2015

The variation of futures price is affected by a lot of factors. It is a challenge to predict the price’s trend. In this paper, we apply random forest technique to predict the type of K-line in next day. First, we empirically select nine technical indexes as input variables or features. Then, these features and the associated class label, i.e. the type of K-line, are used to construct RF classifier. The experimental results demonstrate that RF is effective and can be used in the trend prediction of futures price.
Research on the Conceptual Modeling Frame of Mission Reliability of Materiel System Based on Agent Simulation
Authors: Shen Ying , Cao Jun Hai , He Cheng Ming , Liu Fu Sheng
Published: March 2015

There are two sides of system reliability parameters, such as basic reliability and mission reliability, for reliability requirement in the standard, with fine relevance and coordination. It reflects in the determination of the parameters and index and also in the prediction and allocation for basic reliability and mission reliability. It analyzes from mission profile, state transfer and data collection and process, defines the key elements for the analyses of mission reliability based on Agent simulation, and lays the good foundation for setting up a fine mission reliability simulation model of materiel system, analyzing dynamically mission reliability and making a perfect mission reliability simulation concept of materiel system.
Study on the Algorithm of Electricity Coal Inventory Based on the Balance of Power Supply and Demand
Authors: Yao Jing Ya , Zheng Le , Zhou Jia Chen , Wang Jing Zhong , Hu Wei Min , Yang Shi Yong
Published: March 2015

Since the trend of electricity power industry reformation is to separate power plants from grid, it’s difficult for power Grid Company to interference the operation of plants. But as a manager of grid, it’s necessary for Grid Company to build a calculation formula of monthly standard electricity coal inventory to estimate the security of thermal power plant operation. y analyzing the special features of coal inventory management of thermal power plants. Taking into consideration of the changing demand of electricity and the uncertain supply of coal during a month, a practical inventory model with the target of maximizing the safety of generating electricity was built based on the modified classic safety stock formula to determine the optimal standard safety stocks. It’s depends on history data. Finally, On the basis of the solving results of power plants in Hunan province, the optimal safety stock was found, and the quantity of coal to purchase during a month were also suggested. The results provide a good reference for guiding the purchase and storage strategy of thermal power plant.
Design and Realization of the Reconfigurable Functional Unit Adaptive to General Spacecraft
Authors: Xing Lei
Published: March 2015

The standardized design of space products has become significant since the fast development of pace technology. Currently, the space products are mostly designed separately which brings the fact that the interfaces of these products differ from each other, thus it obstructs the quick integration and test. In order to deal with this issue, this paper presents the reconfigurable unit to unify the diverse interfaces and the application of this method can satisfy the demand of different space missions, thus the research and development period and the cost can be reduced.
Research on the Source of Cu in Jiaozhou Bay
Authors: Yang Dong Fang , Miao Zhen Qing , Song Wen Peng , Xu Zi Jun , Geng Xiao
Published: March 2015

This paper analyzed the content, distribution and source of Cu in Jiaozhou Bay in 1982. Results showed that the Cu contents in surface waters were relatively low, and the pollution level of Cu in 1982 was very slight. The major Cu source in the southwest of the bay was overland runoff; while for the northeast ocean current was responsible. The input contents of overland runoff and ocean current ranged from 2.22-3.56 μg.L-1 and 0.15-5.31μg.L-1, respectively.
Research on the Relationship between Economic Growth and Heavy Metals Pollution of Lake Sediments in Nansi Lake Basin
Authors: Wang Jie Zhong , Yang Li Yuan , Wang Yun Qian , Wang Bing Hua
Published: March 2015

The Environment Kuznets Curve (EKC) hypothesis was applied to explore the relationship between economic growth and heavy metal pollution of lake sediments in Nansi Lake basin. The indicator of economic growth (IEG) was extracted from ten important economic indexes by the method of principal component analysis based on the data from 1978 to 2007. Some representative heavy metals including Hg, Cu, Br and Mn were chosen to analyze the level of heavy metals pollution in Nansi Lake basin. According to the previous research results that the deposition rate of Nansi Lake sediments was 3.5 mm/a, Kriging interpolation method was used to segment the 10.5cm core into 30 parts. The coupling results show that there is an inverted U-shaped curve between IEG and the element Br, half of an inverted U-shaped curve between IEG and Hg and Mn, and a N-shaped curve between IEG and Cu.
Amorphous Silica Produced from Pulping of Rice Husk
Authors: Arefieva Olga D. , Zemnukhova Ludmila A. , Kovshun Anastasia A.
Published: March 2015

This paper covers the results of the research devoted to characterize of silica dioxide samples obtained from alkaline hydrolysate or black liquor produced from pulping of rice husk. The paper discusses amorphous silica of various quality. Silica samples are characterized: crude (air-dried); burnt (no preliminary water treatment); washed in distilled water; washed in distilled water and burnt.
Pretreatment of Pharmaceutical Wastewater by Microelectrolysis of Iron and Fenton Reagent
Authors: Fang Jun Hua , Huang Min , Ren Li Qing
Published: March 2015

The characteristics of raw pharmaceutical wastewater was as follows: CODCr30000~32000 mg/L, BOD54050~4360 mg/L, B/C: 0.12~0.14, Fe-C micro-electrolysis with Fenton reagent was adopted to pretreat this wastewater. Through static experiments analysis, optimal parameters of iron-carbon microelectrolysis Fenton pretreatment process are listed as follows: raw water pH, iron-carbon mass ratio (i.e. 2:3), the mass of iron-carbon (i.e. 500 g/L) and reaction time (i.e. 2 h). The optimal operation conditions (i.e. H2O2dosage is12 mg/L, pH is 3.5, reaction time is 80 min) of Fenton reagent oxidation were confirmed.
Inactivation of Phytoplankton in Ship’s Ballast Water by Pulsed Electric Field and Thermal Treatment
Authors: Zhou Jun Feng , Xie Ting Fei , Xu Le Ping , Zhao Rui
Published: March 2015

Invasive aquatic species discharged through ship ballast water is one of the most serious problems posed nowadays in the marine environment. The effect of inactivation of phytoplankton by pulsed electric field and thermal treatment was studied. Effect factors such as pulsed voltage, electrode gap, pulse width and preheating temperature were explored, and its mechanism of inactivation was analyzed. The combined effect of mild thermal and PEF treatments was shown to give more effective damage of phytoplankton than application of PEF treatment alone. The untreated ballast water sample pretreated at moderate temperature (323 K) and moderate PEF (E ≈10kV/cm) showed a noticeable enhancing of inactivation.
Study on the Soil Enzyme Activities of High Phosphorus Region in Xiangxi River Watershed
Authors: Peng Gang Zhi , Xu Jian Xia , Wang Jian Zhu , Xie Heng , Li Lei
Published: March 2015

The rich phosphorus resources in Xiangxi river watershed had a serious impact on water quality of Xiangxi River. The phosphate ore region distributed in this area was selected as studying area, and the activities of different soil enzymes in 0-20cm and 20-40cm soil layers in mining zone (MZ), transportation zone (TZ) and hydro-fluctuation zone (HFZ) were respectively measured. Meanwhile, the differences of enzymes in the two soil layers between different regions were analyzed. The main results were as follows: The activity of soil polyphenol oxidase decreased in the order of MZ> TZ > HFZ, while the activities of soil catalase, sucrase, urease and alkaline phosphatase were higher in TZ and lower in MZ; Except the activity of soil invertase, the activities of other enzymes in 20-40 cm soil layer were mainly higher than those in 0-20 cm soil layer; The activities of soil enzymes in different regions of XXR watershed had significant differences with each other and were mainly correlated with soil pH, OM and TN; Soil enzymes such as catalase, polyphenol oxidase, invertase, urease and alkaline phosphatase are sensitive to the environmental conditions around the soil, and they could be used as effective indicators reflecting the soil quality in mineral regions.
A Study of Ecological Security Assessment for Natural Reserve
Authors: Diao Zhao Yan , Su De Rong , Lv Shi Hai , Zheng Zhi Rong , Ye Sheng Xing , Jia Yi Shan
Published: March 2015

Based on TM remote sensing image and topographic map, the spatial information of landscape pattern was extracted in study areas in 1990, 2000 and 2010. With the principles and methods of landscape ecology, land use/cover change, ecosystem service values were selected to construct the ecological safety index which was used to quantitatively analyze the dynamic changes of landscape pattern and elucidated ecological safety status in study area. Result showed that During the 20 years from 1990 to 2010, as human factors interference increase, the farmland and construction land increased by 21.11% and 15.38% respectively, the grassland area is reduced by 27.57%.Cropland had an increased trend during the period of 1990 to 2010 period, The wood land and swamp land had an increased trend during the period of 1990 to 2000 area also, but reduced during from 2000 to 2010.From 1990 to 2010, the whole study area lied in the level of relatively safer, but the safe area was reduced the amount of 4967 ha during 2000 to 2010. The relatively safer land areas was increased first then reduced during the whole study period, the relatively non-safer level land and relatively safer level land areas were accounting for 10.81% and 2.92% of the total area respectively.
Coal Mining Subsidence Impact on Soil Physical and Chemical Properties in Windy Desert Area
Authors: Wei Ting Ting , Chen Chao , Ye Shan Shan , Deng Xin Yu , Xie Yan Qing , Cao Yuan Bo
Published: March 2015

The temporal impact characteristics of soil physical and chemical properties and plants characteristic had been revealed by investigation and sampling of multi-phase soil and plants sample in subsidence area and control area. Through the research, it could study the effect of surface ecological environment caused by coal mining, and further propose the corresponding countermeasures of management and restoration. Evolution characteristic of soil physical properties is that soil water content, bulk density and porosity made a response to mining subsidence, and soil moisture content variation was much more obvious and affected by seasonal weather. Evolution characteristic of soil chemical properties is that soil nitrogen and available phosphorus had decreased due to coal mining subsidence, expect pH, organic matter and available potassium. However, the impact degree of subsidence was relative slight and had “partition” feature, showing a trend ofDSR>CUSR&RUSR. Moreover, the response time node of subsidence was different from physical properties with a certain lag, which usually occurred in alternating hot and humid periods. All the affected indexes of chemical properties did not recover to initial level before mining in one year. Based on above studies, a new “partition” differentiated ecological restoration model had been proposed for the first time. For theCUSRandRUSRshould followed “natural closure” model, conversely, theDSRshould selected “marginal fissures filling & vegetation optimization & rhizosphere environment improvement” of artificial induction model, which giving priority to ecological self-healing with supplementing appropriate human interventions.
The Delimited Method Research of Ecological Protection Red Line in Resources County
Authors: Su Xiang Qin , Yu Rong , He Ya Zi , He Chao Chao
Published: March 2015

This paper analysis ecological environment characteristic of Resources County base on the delimited target of ecological protection red line, build a indicator system of ecological protection red line from the forbidden development zones, key eco-function zones, important eco-function zones and priority biodiversity zones, and determine the delimited technology method of ecological protection red line. Such as, finish the delimited of type-I and type-II red line and definite the protection emphasis and direction of ecological protection in red line zones.
The Preliminary Suitability Evaluation of Red-Crowned Crane Habitat
Authors: Yu Miao , Feng Zhong Ke
Published: March 2015

In order to understand the situation of red-crowned Crane habitat, analysis eight main sectors which include vegetation type, vegetation coverage, altitude, slope, aspect, water, residential and road affecting Red-crowned inhabitation, through combining the Remote Sensing (RS) and Geographic Information System (GIS) technology with RS images and basic geographic information, without concerning the food factor. The research obtains the result that red-crowned Crane distributed point both in suitable area and sub suitable area can reach 92.07% consistent with the actual situation through fuzzy comprehensive evaluation and analytic hierarchy process (AHP) to acquire the weight and ranking to build evaluation model.
Constructing the Model of Water Value Balance and Simulation Platform of Urban Water System in Harbin, China
Authors: Liu Bao Ling , Li Gang , You Hong
Published: March 2015

This study proposed the theory of water value balance and built the dynamic model system, based on the water value balance index. To solve dynamic weight issues, the entropy weight model was used, while the gray forecasting model was used for supplement missing data. Simulation platform integrates mathematical module, simulation module, property database and spatial database of urban water system in Harbin, which based on Matlab, C#, CloudSim, Oracle, ArcGIS and its secondary development technology. The results showed that urban water systems had a strong capacity to utilize water to capture value between May and mid-September, the value obtained was not sufficient to compensate the loss caused in the periods from January to April and from late September to December. The loss of water due to unknown causes was close to 7%, while the cost of water quality restoration accounted for 0.89% of GDP.
Evaluation and Prediction of Karst Groundwater Quality in Taiyuan Lancun Spring Area
Authors: Li Yan , Zhang Yong Bo
Published: March 2015

In this paper, on the basis of the research on karst groundwater chemistry characteristics of Lancun spring area, fuzzy comprehensive evaluation method is applied to evaluate the groundwater quality of Lancun spring area, and correlation analysis to predict the trend of groundwater quality. The results show that karst water of Lancun spring area is clean in general, which reached grade I. But in some area where industrial enterprises and towns residents are concentrated, items such as nitrate nitrogen content are relatively high. By 2025, the total hardness and Cl- content of karst water in the majority area of the basin change little, but in several area the total hardness and Cl- content show an increasing trend, but not excessive. Other regions show an increasing trend, but not exceeding standards of drinking water.
Groundwater Pollution Investigation and Remediation
Authors: Qi Fu Li , Zhang Meng Cai , Jin Hui , Li Yong Li , Lu Shou Gang , Zhang Feng Long , Sun Yong Quan , Wang Yi Liang
Published: March 2015

Groundwater is an important part of the human living space and supplies us with high-quality freshwater resources. However, the intrusion of any foreign matter into groundwater may cause groundwater pollution. Once this happens, clearing, control and remediation can be very difficult: not only does it need a lot of money, it is also technically challenging and time consuming. In view of current research on groundwater remediation in and out of China, we propose a package of groundwater pollution investigation, groundwater pollution remediation technology and groundwater pollution control processes with a view to providing theoretical reference for future groundwater pollution remediation efforts.
Index System of Water Environment Capacity Promotion in Jilin Province in China through Ways of Structure, Engineering and Supervision
Authors: Li Yang , Zhao Li , Li Yu
Published: March 2015

In this paper, according to the principles of representative and pertinence, comparability and measurable, independence and so forth, the index system of water environment capacity promotion in Jilin Province is established based on ways of structure, engineering and supervision, which consist of 1 target layer, 3 primary criterion layers, 6 secondary criterion layers and 16 concrete index layers, taking into account need of water environmental pollution control management and concept of environmental pollutant reduction, in order to provide reference for local water administration.