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In order to improve the accuracy and reliability of the defect recognition in rails, the new principle and methods of NDT should be explored, and the safety of railway operation and guiding the repair can be guaranteed. The study is aiming at comparing and analyzing the characteristics of destructive data signals with non-destructive ones. The damage and defect can be judged by the differences of the processed data in the frequency domain and energy spectrum. The location of the defect and damage can be obtained by the singularities of destructive signals using wavelet data processing method: continuous wavelet transform, Mallat algorithm and à Trous algorithm. Based on the above consequence, à Trous algorithm is found that its result is more similar to the real damage location, which proves that the method can be used in the real damage detection and provide us more precise defect location information for early warning.

The basic study on heat stability of polyphenol oxidase (PPO) from purple sweet potato (PSP) was mainly carried out here. Research on thermal stability showed that PPO from PSP was very sensitive to the changes of temperatures. The optimum temperature of PPO was 16°C with the second optimum temperature of 30°C and PPO activity dropped rapidly when temperature was below 5°C or above 45°C. Half-lives of PPO were 450, 240, 66, 50, 21 and 13s respectively at tested temperatures from 65 to 90 °C at 5°C intervals.

In order to alleviate the energy constraint in smartphones, computation offloading is regarded as an effective solution. In computation offloading, how to partition a given application is one of the key issues. On obtaining the best partition, due to the time complexity of partition algorithm, most researchers give up looking for a global optimal solution but to find local optimal. In this paper, a global optimal application partition algorithm is presented, the main strategy is scaling down the problem through merging the correlated nodes firstly, then using 0-1ILP to obtain the partition in order to make the mobile energy consumption achieve global optimal minimum, thus it has less time complexity than 0-1 ILP. Experimental results show that the proposed algorithm made the same global optimal partition results as 0-1 ILP, while it consumed less time and energy than 0-1 ILP.

Event matching plays a critical role in content-based publish/subscribe system. Most traditional methods focus on existing subscriptions separation and combination. However, an event usually comes with certain probability distribution in each dimension. Thus taking both existing subscriptions and probable coming event into consideration can improve event matching time efficiency. Based on that, we put forward PF (Priority Filter), a highly efficient event matching algorithm. By building up a unified model with historical subscriptions for continuous and discrete attributes, we derive formulas to calculate each attribute’s filtering rate. Besides, in order to guarantee time efficiency both in matching, inserting, and deleting, a red-black tree regarded as a priority filter is built up on all attributes according to filtering rate. Experiments demonstrate that PF has a 30% faster speed compared to existing methods with acceptable insertion and deletion time and memory consumption.

The retraction algorithm could make the whole path lie on the medial axis in 2D environment. However, it limits the initial and goal configuration lie on the medial axis. Therefore the paper proposed a path clearance optimization method to deal with the problem. The method retracted configurations of the original path to the medial axis. Then it added the retracted configurations, the initial and goal configuration to the retracted path. We apply R-retraction algorithm to the local paths, but not to the local paths between the initial, goal configuration and their retracted configurations. Finally, we proposed a method to remove the branches. We validated the algorithm in virtual environment. The experiments showed that the optimization method could make the whole retracted path lie on the medial axis and the start and goal configuration lie on any free space. Also the proposed method can get paths with maximum clearance in 2D environment in real-time.

In the background of climate issues of much worldwide attention, developing low carbon economy has become the mutual choice of all countries in the world. China is now currently facing serious international emission reduction pressure and economy development energy environment restriction. Japan, as an island country with extremely poor energy, is the most active advocator and promoter of low carbon economy, and through many years of low carbon development, it has accumulated rich experience. This paper discusses Japanese environment protection and low carbon path from the mutual interaction role of Japanese garbage classification recycling and low carbon economy, so as to combine Jilin Province garbage disposal feature to analyze our province to refer to the garbage processing mode.

The complex geographical environment put forward grand challenge to most current detecting robot on the problem of communication control and moving obstacle avoidance.This paper proposed a crawler robot for complex environment detecting.Information acquisition was achieved by Labview programming,the collected sensor information was debugged by fusing and displaying in the Labview interface , in order to realize the stability of the system.The positioning part adopted wireless location technology of ZigBee networks,which can support a large number of network nodes, fast, and reliable security etc.In addition, the upper part of the robot body was equipped with camera and mechanical arm to achieve target capture, carrying something and other tasks. According to the situation of accident, remote control terminal through wireless control function can control the further action of the robot. Through experimental tests, this paper proposes this kind of detection robot had great advantages in detection, search and rescue, it can complete the search under complex and dangerous environment.

For the problems of few current defogging effect evaluation methods and limited evaluation methods, it proposes an image clarity effect evaluation method: the method combined with relative contrast and edge similarity. This is because: the contrast degree of fog image and non-fog image is obviously different. While improving image contrast degree, it should also try to make the edge structure of recovery image and reduced image consistent to prevent the recovery image from distorting. The experiment proves that this method can effectively evaluate the clarity effect of each algorithm, and the evaluation result and the subjective feelings of the human eyes are consistent. Compared with the existing evaluation methods, it obtains overall evaluation conclusion and also has a good practicability and reliability.

A structure of fault manager is established. Under the premise of combining relevant standards, the five main modules of the fault manager effectively integrated and handled fault information. This fault manager is implemented in a home-ECU for its upcoming production.

As a promising technology for broadband communication, Passive Optical Network (PON) has been deployed to support the communication in smart grid system. This paper theoretically analyzes the influences on Directly Modulated Laser (DML)-based PON system performance including Bit Error Rate (BER) and power budget. First, we establish the DML-based PON system model, and then the system performances are simulated under different linewidth enhancement factor, received optical power and fiber length. Simulation results show the increase in received optical power to maintain a given BER due to fiber nonlinearities. This research provides a theoretical guidance on the PON system design.

A large cement factory as an example, according to the requirements of process and control parameters of production line of raw mill, this paper researches and designs the automatic control system of cement raw mill production line based on PCS7 and PROFIBUS. The design of the whole system consists of three levels: field layer, control layer and operation layer which are connected by Ethernet and PROFIBUS implementation, and focus on the design of the feed flow includeing feed composition, feed machine speed loop control etc. Through the on-site operation, the system is stable and reliable, and has good application and promotion effect.

This paper presents development length comparison between Chinese and Australian codes study on HRB500 steel bars in concrete. After introducing the existing code provisions about the anchorage length and experimental investigation of tensile HRB500 steel bars, the calculation approaches in different codes are compared with the test data. Additionally, the development length of tensile HRB500 reinforcement bars in AS3600-2001, Proposed Revision of AS3600, GB50010-2010 and the calculation equation proposed from test results are compared with each other in beams and slabs. It is proved that AS3600-2001 is inconsistent with other standards and the tests results and needs to be revised, while the Proposed Revision of AS3600 provided a good agreement with the test data and brings the code into line with other international codes, particularly Eurocode 2. Moreover, the Proposed Revision of AS3600 is a significant improvement on the method in AS3600-2001. The anchorage length formula in GB50010-2010 can still be used for designing HRB500 steel bar.

An accurate measurement of noise wave is the key to effective noise control in a tunnel. In this paper, an IP based audio test network is presented. This network includes 100 battery powered recorders and a WIFI network. Each recorder can acquire 2 channels of audio waves and be triggered by external signals of infrared or electrical synchronic pulse. A main control computer connects these recorders to setup parameters and collect data via the WIFI network. Sensors are reassembled to be compatible with the interface of standard sound source. Meanwhile each sensor is fixed in a sensor holder, which can be placed to any position on a plane and can be used to adjust its sensor to 0-180 degrees in both of X-Y direction. The sound source generates various signals, such as clicks, tones, and tone bursts, to help understand how the sound propagates in tunnels. This designed network is capable of acquiring multipoint sound waves synchronously.

A clock-inverter feed-forward toggle flip-flop (CIFF-TFF) based ultra-high-speed 2:1 dynamic frequency divider is designed in a GaAs heterojunction bipolar transistor (HBT) technology with fT of 60 GHz from Win Semiconductors corporation. The co-simulation methodology of electromagnetic field and schematic diagram is utilized in the design. Through tuning the currents in the core and the other parts of the divider separately, the dynamic frequency divider approaches an operating speed of 36 GHz with a power consumption of 162 mW in the core part from a single 6 V supply. The design is currently taped out.

The problem of WLAN anti -interference has become an important issue that affects the application. This paper explores the electromagnetic parameters' optimization of λ/ 4 type dielectric absorber in 2.4GHz and 3.6GHz .Studies show that: through the early design of the material's parameters, such as complex permittivity and thickness, the obtained ideal electromagnetic parameters' area can achieve a predetermined reflectivity at the desired frequency , then choose material to get high absorbing preparation , which can provide design basis for the preparation of different frequency band and high performance electromagnetic wave absorber.

This paper discusses the design of a fault-tolerant Permanent-Magnet Synchronous Machine (PMSM) for electric vehicles. The investigated machine is a five-phase in-wheel machine with 40 slots and 42 poles. The electromagnetic performance of double layer and single layer windings are compared based finite element analysis. The magnetic isolation abilities of the two winding types are also compared. Finally, a 12kW five-phase fault-tolerant machine which is able to meet the demand of electric drive system is designed and evaluated.

This paper deals with a low-speed high-torque six-phase fault-tolerant permanent magnet synchronous machine (PMSM) for wheel-driving electric vehicle (EV) applications. In machine design, winding arrangements and feasible slot/pole combinations are discussed and compared; a 24-slot/22-pole alternate-teeth-wound scheme is analyzed and designed. With reinforced slot-leakage component, the inductance of the machine is increased to restrain the one-phase short-circuit current to nearly 1.0 per unit preventing the machine from deteriorations in condition of that fault. The 24-slot/22-pole alternate-teeth-wound prototype machine is manufactured and the experimental verification is provided.

With the increasing requirements for driving comfort and reliability of electric vehicles, the multi-phase fault-tolerant permanent-magnet synchronous machines (PMSMs) have drawn more and more attention. A 40-slot/42-pole five-phase outer-rotor PMSM is investigated. The electromagnetic structure is designed, and the winding configurations, pole-arc coefficient, magnetization direction, and the structure of slot notch are optimized to obtain better machine performance.

This paper reported a new type MDF absorber of high absorption and Broadband was successfully prepared, according to the Electromagnetic Wave Absorbing Theory, by means of the theoretical design and simulation analysis by using MDF as the dielectric material and And with the resistance film composite. Results shown that the resistance of resistive film was 195Ω/□, the monolayer combined sample with thickness as 1.4cm in 2~4 GHz frequency bands, the range of absorbing over -20dB could achieve 50%, and all absorption could exceed -15dB in the whole S-band, the maximum absorption peak was -25dB, moreover, the absorption bandwidth of MDF was more than λ/4 Type EWM-absorber. The new materials could be used to improve residential electromagnetic environment and control pollution.

Based on the principle of electromagnetic wave absorption, through the double-layer matching design and simulation analysis, taking foam cement panel as the dielectric material, combining with the resistive film, the paper has successfully prepared high-performance and broad-band foam cement absorbing panel for electromagnetic pollution control. The result shows, with the use of double-matching design that combines 140 Ω/□ resistive film with foam cement absorbing panel whose each layer thickness is 1.4 cm, in the S band , 100% of bandwidth below-10 dB and 95% of bandwidth below-14 dB can be reached, a maximum absorption of-19.6 dB at 2.45 GHz, the width of the absorption is far more than that of λ/4 type absorber. New materials can be used for the improvement of indoor electromagnetic environment and pollution control.

High-rise buildings, as a result of rapid urbanization in China, become one of popular structure kind. However, there have been few seismic vulnerability studies on high-rise buildings, and few fragility curves have been developed for the buildings. Based on the published data of more than 50 high rises and super high rises, the structural information such as building heights, mode periods, locations and sites, the maximum design story drift ratios, are collected and analyzed. The vulnerability analysis for high rises uses response spectrum displacement as seismic ground motion input, since the structures have comparatively long natural period. Using statistics and regression analysis, the relationship between the maximum story drift ratio and response spectrum displacement is established. Based on height groups and earthquake design codes, the fragility curves of different performance levels can be developed. These curves can provide good loss estimation of high rise structural damage under earthquake ground motion.

This paper analyzes the radar anti-jamming adaptive antenna beamforming algorithm, orthogonal subspace projection algorithm used in radar anti-jamming eigenvectors in the process can not be completely orthogonal subspace decomposition, constraints annihilatorspace decomposition algorithm to ensure orthogonal subspace eigenvectors. Finally, the simulation proved: subspace tracking algorithm has stronger anti-interference performance relative to the traditional adaptive algorithm.

In modern warfare, electronic jamming air defense missile weapon system is the greatest threat to the seeker for terminal guidance radar interference is an important aspect of electronic interference. Successful interference allows the weapon system hit rate to reduce or even out of control. Therefore, analysis of the impact of interference on radar seeker to intercept and track the performance of meaningful analysis and modeling, this paper mainly targeting blanket jamming interference and interference conditions of the monopulse system radar seeker performance were analyzed.

The performance of radar anti-jamming (ECCM) to become an important parameter in modern radar, how objective and comprehensive assessment of the performance of radar equipment development and use are of concern, this paper analyzes the radar-jamming environment, build a radar evaluation index systemestablished anti-interference assessment models, the results of the assessment, and finally a brief analysis of the results.

A rigorous mathematical analysis of cross-eye jamming in a radar system scenario and an expression for the induced angular error due to the cross-eye jammer are presented. The simulation results show that there is a Doppler difference between jamming and target return. The Doppler difference increases with the decrease of the distance between the monopulse radar and the platform protected by cross-eye jammer. When the power of target return is not small enough with respect to the power of jamming transmitted by one of the two sources, maybe the sign of the indicated angle is uncontrollable. The simulation results also show that although the cross-eye gain is maximized if two jamming signals are equal amplitude and antiphase, it is not a reasonable choice.

This paper presents a robust state estimation and 3D environment modeling approach that enables Micro Aerial Vehicle (MAV) operating in challenging GPS-denied indoor environments. A fast, accurate and robust approach to visual odometry is developed based on Microsoft Kinect. Discriminative features are extracted from RGB images and matched across consecutive frames. A robust least-square estimator is applied to get relative motion estimation. All computation is performed in real-time, which provides high frequency of 6 degree-of-freedom state estimation. A detailed 3D map of an indoor environment is also constructed.

A method based on the combination of experts’ assessments and D-S evidence theory of weight is proposed for reliability about result of quality evaluation. This method recurs to the idea of meta-evaluation, and actualizes the reliability measurement, then provides technical support for robust evaluation. Finally, we validate the method by using weapon primary evaluation result. It indicated that the method can measure the validity and reliability for primary evaluation result, and then improved commendably decision-making capability of weapon quality evaluation.

A new type of inline coating system is designed and developed. The coating system can be mounted into printing press instead of blanket cleaner. An anilox roller and a sealed duct on the glazing oil transferring part for supplying and transferring the coating oil are introduced. A set of pressure adjusting mechanism is designed for changing the pressure between anilox roller and blanket cylinder, while a set of on-off impression mechanism is arranged to change the position of anilox roller and the on-off impression state. The press can print as normal when the coating system is dismounted. With this coating system, the press can coat prints with glazing oil. This system can be mounted in various type of printing machine. One new type of glazing technology named reverse coating can be achieved when it is mounted in multicolor press.

The paper has designed a two-position Press Machine based on linear motor and lever-double idler wheels force-amplifier and analyzed the system principle and mechanics. The press machine can amplify the force evidently and improve the function, using only a linear motor to drive two positions work with its simple and compact structure. This will improve the work efficiency and reduce the cost of the machine.

In this paper, based on the FPGA and with a PAL decoder chip, LVDS coding chip and large capacity SRAM, the design and implementation of a PAL system for analog signals to the LVDS conversion of the video signal interface board. First of all, convert the analog signal of PAL to RGB565 digital video signal, and transform the interlaced scan into progressive scan. Then, through the frame rate conversion, resolution expansion etc. algorithm method to handle. Finally, to achieve the interlaced scanning, a resolution of 720×576, 25Hz PAL analog video signal, is converted to a progressive scan, a resolution of 1024×768, 60Hz LVDS video signal transmission. After the measurement, the resolution and frame rate of the video signal conversion interface board are all meet the design requirements. It has been verified the effectiveness of scheme.

A two-dimensional image matching method based on the improved Hausdorff distance and global harmony search optimization is presented in this paper. First, edges are extracted form the original images by the Canny edge detector. Then, a fitness function based on the improved Hausdorff distance is constructed. Finally the global harmony search optimization is adopted to optimize the fitness function. Experiments show that the proposed method is able to locate the object of interest globally and efficiently.

An experiment for Marangoni condensation of ethanol-water mixtures was carried out and the departing radius and drop size distribution on vertical surface was presented. An amended formula was obtained after considering the effect of ethanol mass concentration, vapor velocity and condensing temperature difference based on Le Fevre’s formula concerning departing radius of pure water, The calculations were in good agreement with experimental result, had a maximum error less than 23%. Owing to the significant effect on drop size contribution, vapor velocity was introduced into Rose’s formula, and the correctional result compared well with the experimental data.

Fujian Province is one of Coal shortage for the southern provinces, under the premise to ensure safety of existing and the nowadays conditions of mining as much as possible recovery of coal resources under the old empty water. Uncle YongDing County, Fujian Province Coal mining under the old empty water, for example, to carry out joint working face with a high degree of water flowing fractured measured. Because the field complex geological conditions, the use of empirical formula and numerical simulation method to calculate the upper mining limit, and greater access to the actual situation. Only through in-situ measurement, to obtain specific geological mining conditions of the mine under the true information in order to obtain the actual situation of the mine found the correct data. To this end, this small coal mines in Fujian Province in the first the new technology that upward hole with a multi-stage water underground observation method was used to observe a high degree of fracture of Water, through in-situ construction and arrangement of holes and cracks under the conduction of water with a high degree of observational data analysis and results showed that after two coal face showed continuity with the overlying rock fracture characteristics, top boundary height 43.4m, 3.5m thickness calculated in accordance with mining, mining split ratio of 12.40.