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The finite element method model of a 670.56m span cable-stayed bridge was established and the dynamic characteristic and nonlinear earthquake-responses of it under uniform and traveling-wave excitations were systematic studied. Results show that: 1) its former 10 rank frequency are located very dense which shows that more modes shape should be considered when dealing with the dynamic analysis. 2) The traveling-wave excitation has greater effect on long-span cable-stayed bridge, especially on the more flexible component and great attention should be paid to the design of such kind of bridge.

In order to avoid the cascading tripping caused by power flow transferring, a fast identification method of two branches simultaneous removal under multiple voltage levels was proposed. Calculate the per-unit value of element parameters under different voltage levels. Search the K shortest paths between the two nodes of broken line with the network topology considering the two branches removal and the value of K was optimized. Use the power flow transfer factor to estimate the power flow increment of lines on the path and the key lines in power flow transferring were obtained. The method is accurate and it is verified in the IEEE39 node system.

Digital copyright protection is a bottleneck in the cross-media industry currently. In this paper, image normalization technique is used to map image into a geometric invariant space. Then, important area is extracted from the normalized image. At last, important area’s low-frequency DCT coefficients and watermark image are used to construct copyright information. Simulation results show that, without changing original image data, the proposed scheme is robust to geometric attacks and some conventional signal processing attacks. Hence it provides an effective solution for high reliability copyright protection.

An active dye, Methyl Orange (MO) was employed as the target pollutant to evaluate the photocatalytic activity of TiO2/schorl composite and the kinetics and thermodynamics of this process was emphasized in this work. Langmuir–Hinshelwood kinetic model was employed for the kinetic studies and the results revealed that the process of MO photocatalytic discoloration by TiO2/schorl composite followed one order reaction kinetic equation under different conditions. The reaction rate constant (k) increased with initial MO concentration decreasing. When the catalyst dosage or solution pH increased,kvalues increased and then decreased. The possible reasons for these phenomena were discussed. Finally, the thermodynamic parameters ΔG, ΔH, ΔSwere obtained by the classical Van't Hoff equation.

In situ growth of TiO2 nanocrystals on the surface of schorl was realized via Sol-Gel method in this work. The obtained TiO2/schorl composite photocatalysts were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). An active dye, Methyl Orange (MO), was used to evaluate the photocatalytic activity of TiO2/schorl composite photocatalyst. The effect of sintering temperature and time on the photocatalytic activity of TiO2/schorl was emphasized in this work. XRD results indicated that TiO2 existed in the form of anatase only when the temperature was less than 550°C, and the sintering time was less than 2.5h. Higher sintering temperature and longer sintering time could impel the appearance of rutile phase. SEM observations revealed that the nanosized particles of TiO2 were well dispersed and immobilized on the surface of schorl. The optimum preparation conditions of TiO2/schorl composite with best photocatalytic activity were that sintering temperature was 550°C and sintering time was 2.5h.

A novel O-P-O bridged [Mn (3-MeOsalen)·H2O] (3-MeOsalen = N,N'-ethylenebis (3-methoxysalicylideneiminato) dianion) chain compound, namely [Mn2(3-MeOsalen)2(O2PPh2)(H2O)2] [Mn (3-MeOsalen)(H2O)2]·(ClO4)2·(H2O)4 (1) is successfully synthesized and structurally characterized. Compound 1 crystallized in monoclinic, space group P21/c. This compound consists of two fragments, the dinuclear cationic unit [Mn2(3-MeOsalen)2(O2PPh2)(H2O)2]+, which is resulted from O-P-O bridged cationic unit [Mn (3-MeOsalen)·H2O]+, and mononuclear unit [Mn (3-MeOsalen)(H2O)2]+, forming an one-dimensional chain by intermolecular hydrogen bonding and strong π-π stacking.

The manufacture of fire robot has characteristics such as different types and piece production, and flexible manufacture and cost control of the fire robot must be considered due to these characteristics. In this paper, the similarity of fire robot’s working environment was analyzed, The demand of chassis’s adaptability and the method using general technical platform were discussed with the thinking of modular design, and new series fire robots which composed of the general platform and different function modules were proposed, and the manufacture cost of traditional design method and modular design method were compared in using the activity-based costing method, and under the new design method the manufacture cost were decreased extremely.

The suspension of fire robot, one of necessary components, directly impacts the environmental adaptability, and the strength of suspension has great importance to the life of robot. In the paper, the structure and the stress condition of the suspension was analyzed. The force condition of suspension is simplified as a 2-D diagram, the load acting on the elbow were simplified in two direction, A finite element model, which simulated the impact load and optimized the design of suspension, was established, and the result of the simulation shows the suspension structure is reasonable and the strength of the component is enough.

With the global climate change and air quality gradually become today's serious problems that affecting the quality of human survival and people's life, aerosol satellite remote sensing quantitative measure gradually become a trend. Taking Tianjin city as example, This article based on HJ moonlet using dark pixels and combined with 6s radiative transfer model, calculated the aerosol optical thickness on the day of December 26, 2013 of Tianjin. And use the CE-318 sun photometer observations on the inversion results of the verification, found that the inversion method was effective, its error is within 20% on the day.

This paper introduces in detail the characteristics and applications of composite beams of steel and concrete, and discusses the current research situation of steel and concrete composite beams and put forward to solve the problem. Through the paper systematically analyze and compute the stress structure of composite beams to determine the technical indexes in detail. The results show that, the structure of composite beams of steel and concrete stress is reasonable; the economy is good, need to vigorously promote.

This paper introduces a design of different-frequency grounding resistance meter using MCU 80C196KB as the core. This instrument generates a current with a different frequency at about 120Hz to be injected into the ground grid. By adopting current-voltage method, the design enables an accurate measurement of the grounding resistance of large-scale ground grid, such as, power systems, architectural buildings, military facilities, and airports. The instrument controls the output of different-frequency electrical source by using MCU and DDS techniques. Moreover, the utilization of RMS-DC devices simplifies its data acquisition and data processing. In addition, the application of hardware and software filtering technology reduces the measurement error which may be caused by frequency interference, measuring disturbing between lead wires.

The success rate of domain name resolution has a direct influence on the service of DNS. Analytical performance of DNS server is the key to measure the satisfaction degree of users when they access to the network. This article establishes the dependence model for the domain name server. In order to get DNS fault model and analytical model, this article uses Fault Tree Analysis theory to describe the relationship of tree basic events and target events of fault tree of dependency. On the basis of fault tree model, dependencies of domain names are qualitative analyzed, including number of sets and element composition of fault model and analytical model. This study provided a theoretical basis for DNS dependencies and technical support for the DNS vulnerability analysis. It has a great importance for domain name system security.

The determination of the rational layered water injection intensity is the basis to stable oil production and high-yield in oil field. This article analyzes the various influential factors of the separated layer water injection intensity, using grey synthetic degree to determine the dominant influential factors. The weight value is obtained by normalization, each influence factor is quantization. Using grey correlation analysis method to determine the plane dividing coefficient and the vertical dividing coefficient, a reasonable stratified water injection intensity formula is got. This method considers the impact of these factors which consist of permeability, the measure transformation coefficient, perforation thickness, injector producer distance, location coefficient and the number of injector and producer. The problem which the contradiction exists in the same layer or between the layer and layer is obvious in the D block through combining with the current water injection development, reasonable dividing coefficient of block is established, a reasonable stratified water injection intensity formula is got, making well block reasonable injection and increasing adjustment effect of water flooding.

The marine medaka Oryziasmelastigma was used as model organism to detect and evaluate the cardiac function alterations of medaka embryos due to oil exposure induced ecotoxicological effect in the present study. Results showed that the developing medaka heart was a sensitive target organ for the toxic effects of crude oil. Cardiac function of medaka embryos was clearly affected by exposure to WAF of crude oil after 24 hours exposure. Significant differences in cardiac structure and function of medaka embryo were found between exposed and control groups. The chemicals in crude oil slowed down the embryos heart rates, reduced cardiac contractility capability and causes irregular heartbeats. At higher exposure concentrations (7.2 mg/L), swelled and enlarged heart morphology, lower blood circulation and accumulation of blood around the heart area was found. These findings indicate that cardiac function of marine medaka embryo may be used as a toxicity model and biomarker for oil pollution.

In this paper, we investigate the boundary value problem of the nonlinear fractional differential equationwhere is a real number, is the Riemann-Liouville's fractional derivative, and is continuous. we obtain that the unique positive solution can be uniformly approximated by any iterative sequence, initiated by an arbitrary function that is nonnegative and continuous, and does not identically vanish on [0,1].

This paper presents the backtracking search optimization algorithm with low-discrepancy sequences to solve mechanical design optimization problems involving problem-specific constraints and many different variables. Similar to other evolutionary algorithms, backtracking search optimization algorithm is sensitive to the initial population. Generally speaking, since there is no information about the optimization problem, the initial population should be created uniformly. The low-discrepancy sequences are employed to increase the uniformity of the initial population. The benchmark problems widely used in the literature of mechanical design optimization are used to evaluate the performance of the presented algorithm. Results show that the proposed algorithm is effective and efficient for solving the mechanical design optimization problems considered.

With the aim to improve the controlling efficiency of engineering project, this essay probes into the comprehensive evaluation of controlling efficiency of engineering project and put forward scientific comprehensive evaluation method to provide support to reasonable comprehensive evaluation of controlling efficiency of engineering project. Complete comprehensive evaluation index system of controlling efficiency of engineering project is constructed from three aspects, i.e. implementation efficiency of construction objective, external coordination efficiency and professional qualification enhancement efficiency; based on matter-element analytical method, mathematic model that could evaluate controlling efficiency of engineering project comprehensively is constructed.

The dew point detection often occur in the industrial field, and control schemes of intelligent dew point measurer directly influence its detecting precision and response time. The sensing signal of dew layer thickness is used as the control object directly in previous control schemes. When the control object is stable and reach the set value, the temperature signal is detected and be used as the dew point temperature. Control effects of above schemes are not ideal because they ignore the radioactive statistical fluctuation. The more effective control law of intelligent dew point measurer is presented by introducing the real signal of dew layer thickness and using Gevers-Wouters algorithm to estimate it. It can make the control process more accurate and improve the detecting precision and response speed of intelligent dew point measurer. It is suitable for real time applications.

Graphitic carbon nitride (g-C3N4) polymer material was synthesized via a simple approach by directly heating melamine as the precursor at 500°C. The phase composition, chemical functional groups, and surface morphology of the obtained product were studied by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM), respectively. All the characterization results identified the formation of g-C3N4 with stack-layered structure. The absorption and photocatalytic performance of as-synthesized g-C3N4 for the discoloration of an active dye, Methylene Blue (MB), were proved to be excellent and control experiments inferred that adsorption and photocatalysis governed the MB discoloration under UV irradiation. The repeated experiments indicated that the obtained sample could be reused more than five times without loss of its absorption capacity and photocatalytic activity.

Considering the problem that the traditional fuzzy c-means (FCM) image segmentation algorithm is often caught in a specific range in local search and fails to get the globally optimal solution, this paper proposed a modified FCM algorithm based on chaotic simulated annealing (CSA). It traverse all the states without repetition within a certain range to calculate the optimal solution. Experimental results show that our method converges more quickly and accurately to the global optimal and proves a promise global optimization method of high adaptability and feasibility.

Gold nanoparticles (AuNPs)/ZnFe2O4 nanocomposites were prepared by a colloidal deposition (CD) method. The as-prepared AuNPs/ZnFe2O4 nanocomposites were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive spectrum (EDS). XRD results showed that the diffraction peaks of AuNPs gradually increased with the increase of AuNPs content. SEM observations revealed that the AuNPs were presented as regular nanoparticles on the ZnFe2O4 in all the composites. With the increase in Au content, the amount of AuNPs deposited on ZnFe2O4 surface increased. EDS element analysis indicated that the actual content of AuNPs in nanocomposites was consistent with its preset value before preparation by CD method. An active dye, Methyl Orange (MO), was employed as the target pollutant to evaluate the photocatalytic activity of AuNPs/ZnFe2O4 under UV irradiation. The photocatalytic evaluation showed that MO discoloration ratio could reach 72.17% when the nanocomposite with AuNPs content of 5 wt.% was used as the photocatalyst. Finally, the possible mechanism for the enhanced photocatalytic activity of ZnFe2O4 by AuNPs was proposed.

Material properties in the process of tribo-emission decides the characteristics of both spectra and intensity of triboluminescence. ZnS:Mn semiconductor material was proved to be a high emission triboluminescent material in many investigations; Ce- and Yb-doped hexacelsian possess the excellent shortwave triboluminescence character due to f-d electronic transition of doping element with position valances ions; the fracto-mecha-luminescence and photoluminescence spectra of phthalic acid, 4-hydroxy coumarin monohydrate, etc. present obviously a broad ultraviolet and violet waveband emissions, showing the disadvantage of these organic crystals as shortwave triboluminescence materials. Triboluminescence test apparatus of drop tower type have the tribo-emission of impact friction effect; the pin-on-disk type apparatus can perform the triboluminescent experiments with sliding friction mechanism; the twin ring tribometer is used to measure the triboluminescence of polymer material friction rings. These units supply a suitable conditions for obtaining triboluminescence with shortwave emission and persistent high intensity.

As an innovative heterogeneous UV-Fenton catalyst nanocomposite, ferroferric oxide (Fe3O4) with inverse-spinel structure trapped by Multi-walled carbon nanotubes (MWCNTs) was successfully prepared by a facile and in-suit strategy in this study. The as-prepared products were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). An active dye, Methyl Orange (MO) was employed as the target pollutant to evaluate the UV-Fenton efficiency of Fe3O4/MWCNTs nanocomposite. The effects of operating parameters, including solution pH, initial MO concentration, reaction temperature, initial H2O2concentration and catalyst dosage on MO discoloration were detailedly investigated. Control experiments indicated Fe3O4/MWCNTs exhibited higher ability for MO discoloration than bare Fe3O4under the same experimental conditions, which might be attributed to the synergetic effect between Fe3O4and MWCNTs.

The seismic response of the Wusong bridge was analyzed though the response spectrum method and the time-history method by adopting the MIDAS/CIVIL. The analysis results show that the longitudinal displacement of the main girder is much larger under longitudinal seismic input, so some inhibiting device or dampers should be used to avoid impacting. There is not coupling between longitudinal and lateral seismic excitations, while the seismic response of moment and shear force at the bottom of the main tower is much larger. On the contrary the seismic response of main beam and the main cable should be calculated under the longitudinal and vertical seismic excitations because of the coupling between the both of them. Furthermore, the artificial seismic wave fitting standard response spectrum was generated to conduct the time-history analysis and the results are much larger than the results from the response spectrum method.

Earthquake is a kind of natural disaster which is difficult to predict and the damage degree is very great, occurrence of the strong motion often leads to the tremendous life and property loss. Bridge is very important lifeline engineering and it is very necessary to conduct the comprehensive and systemic investigation on the bridge aseismic. In this paper, the FEM model of a long-span cable-bridge was established; the dynamic characteristic and nonlinear seismic responses under uniform and non-uniform excitations of it were systematic studied. The results show that: 1) the basic cycle of it is about 8.881s. Its first mode of vibration is longitudinal floating mode, which is favorable to the earthquake-response of structures. 2) Its former 40 rank frequency are located between 0.1~2Hz which is avail to the condition of traffic condition.3) the geometric nonlinearity has much influence on the response of this kind of bridge.4) the seismic responses are sensitive to the frequency spectra of the input earthquake wave. 5) The traveling wave excitations are unfavorable to the design of tower and the main girder when considering the three orthogonal seismic wave input. In order to get correct results, artificial seismic wave of the bridge address is necessary to the time-history analysis.

The method of structural vulnerability assessment presented in this paper is closely in accordance with the definition based on two aspects, strain energy of structure and damage demand of members. The search process of damage scenarios was carried out by an example of truss structure, and the results of analyses included importance factor of members, damage scenarios with the minimum number of killed members, and local damage occurred in advance. The influence of loading on member importance factor and vulnerability index was discussed and it showed that though with the agreement of general trend, the rank of importance factor or VI index under a specified scenario varied greatly. The analysis could be utilized as the proof of measures to enhance structural capacity to meet the extreme event.

Exoatmospheric IR detector is an effective means of space debris detection. In order to achieve the goal of an effective detection for low-orbit space debris, study the detection range for exoatmospheric IR detector. Studied the infrared detection technology, as well as the specific characteristics of the low-orbit space debris and other related aspects. First of all, introduce the method of detection process and determine the characteristic parameters of the space debris and infrared detectors. Then, calculate the space debris’ own infrared radiation energy and the background radiation energy. Then, by the infrared detector receives the photon number, refer to the engineering practice, the detecting range for exoatmospheric IR detector enhanced in evidence. The ground-based experiment demonstrates the calculation is preciseness and credibility. The space debris’ orbital height is 550KM and its size is 8m × 1.2m × 0.025m. Under such conditions, the detecting range for exoatmospheric IR detector is 48KM .This method can provide a certain referential significance for pace debris detection, imaging, and attacks.

Because reinforced-fiber has characteristic of single step forming in three-dimensional braided composites, analysis of mechanical performance is very different from laminates. This paper proceeds from the micro-structure of 3-D braided composites, some review and research are presented detailedly, and the several model’s merit and demerit are analyzed, which can conduct dynamicists to choose reasonable numerical model. The mechanical performance can be predicted accurately, and the next research can be guided using above analysis.

The construction of ultra-high voltage grid and the input of large generating units make the out-of-step protection become increasingly important. Traditional out-of-step protection device can only judge from local perspective, no consideration to the global situation. In order to solve this problem, a coordination control method of generator out-of-step protection based on WAMS transient stability prediction is proposed, the coordination between grid side out-of-step protection and the generator out-of-step protection is achieved. Using the self-memory trajectory to predict the stability of grid, calculate excess energy of system based on EEAC theory, and utilize convexity-concavity of phase diagram method which is not affected by the change of network structure to judge the stability of system. Utilize double forecast strategy to improve the stability of the system further.

People’s attention of transformer condition assessment is increasing in recent year and data mining is applied in transformer condition assessment with its obvious superiority in dealing with complex data and finding potential problems. In this paper, the process of the research on applying data mining to transformer condition assessment is summarized. The research results of data processing methods such as rough set theory, principal component analysis and colony algorithm as well as the research result of transformer condition assessment such as vector machine, neural network, Bayes network, association rules and fuzzy theory are introduced, analyzed and compared in detail. The advise on the choice and quantification of figure, the employ of the pattern recognition method, the blend of multi-information and visualization display are given.

Taking use of industry configuration technology in intelligent transportation system (ITS) can solve the problem of close attention to various components and high requirements on technical ability. In this paper, a configuration control is applied to establish remote monitoring on intersection traffic lights. This application can remedy the limitation in graphics when programming in software development. Practice shows that this method has the characteristics, simple to use, visual in effect and has considerable practical value.

The author proposes a novel DCT domain image encryption algorithm based on Lorenz chaotic system. The paper firstly subdivides digital image into sub-images, each of which is transformed with DCT transform. Then some DCT transform coefficients are selected with filtering. Finally the retained DCT transform coefficients are cross encrypted with three chaotic sequences which Lorenz chaotic system generates. Simulation experiments and secure performance analysis show that the algorithm has a good encryption effect and anti-attack abilities.

Image interpolation is one of the key technologies in image processing. A special distance correction algorithm based on membership function is proposed in this paper to complete image interpolation. Fuzzy logic is used to get the membership function with the local characteristics of the gradient and phase angle. The first step is to correct the special distance of interpolated pixels along one dimension in the basis of local asymmetry features and the membership function, then convert the corrected distance of one dimension into two dimension, applying the corrected distance to conventional image interpolation algorithms. Experimental results demonstrate that this algorithm can produce better results in regard to the signal-to-nosie ratio and succeeds in preserving interpolation image edges of various directions.

In order to analyze the nonlinear dynamics of milling chatter, first we develop a cutting vibration signal acquisition and analysis system based on Labview platform; extract the phase and the maximum Lyapunov exponent of cutting vibration signal. We analyze characteristic value of vibration signals under different cutting conditions, and then online forecast milling chatter.

When automobile is braking in a turn, the left and right wheel load changes, often leads to excessive loss of vehicle steering stability. The process of steering is often accompanied with braking, we can improve the control strategy of anti-lock braking system which widely used in vehicles to maintain the steering-braking lateral stability.

This paper introduces the multi-echelon comparison hybrid particle swarm optimization (PSO) algorithm and its processes, and describes its application in the testing point optimization, and the simulation analysis and comparison show that the algorithm improves the convergence speed of global search, and overcomes the shortcoming that fundamental particle swarm optimization algorithm is easy to fall into "premature" convergence and other shortcomings.

With the continuous development of information technology, word segmentation technology becomes an important link in dealing with the increasing amount of information conveniently. Different from English word segmented by spaces, Chinese writing is continuous, and there is no space between words, this brings a lot of trouble to word segmentation. In this article, through the analysis of different property of words to get a code that can be used for training and combined it with the first kind of spline weight function neural network, then by training a large number of existing rules encoding to generate a study method that can divide the statement correctly.

An adaptive clock variance calculation algorithm is designed to improve the real-time characteristics and complexity of general method. This algorithm use the latency and smoothing characteristics of exponential smoothing to achieve real-time calculation online. Using this algorithm, synchronous system can response to environmental changes in a short time. The test result shows that the real-time characteristics and output robustness can be improved obviously.

Rapid and automatic extraction of pollutants is of great importance for mobile camera in real-world scenarios. In the moving process of robot, the camera is treated as dynamic background, and the pollutants on the camera are treated as static target. So as to realize the detection of static target in dynamic scene, this paper presents an automatic extraction algorithm for pollutants based on frame difference accumulation. Firstly, this algorithm can determine whether pollutants exist or not by the overall trend of gray histogram of the cumulative frame difference images. And then if existing pollutants, Otsu algorithm was adopted to adaptively calculate threshold to convert the gray image into binary image. In this paper, analysis of the important parameters of the algorithm - cumulative frame number and frame difference threshold was implemented. Moreover, feasibility of the algorithm was verified by experiments on the automatic extraction of pollutants for gun-type camera.

Electromagnetic interference easily appears in the propulsive wheel - a key component of the mobile robots, because internal space of propulsive wheel is very small, there are numerous electronic devices, and signal communication is complex. So electromagnetic shielding is very important for the propulsive wheel. In this paper, a wheel model and an equivalent source model of electromagnetic interference of the wheel were developed based on considerations of the internal electromagnetic properties. At the same time, a secondary source of electromagnetic interference is formed by heat sink. Hence, shielding effectiveness is taken as one of the evaluation criteria for the Electro-Magnetic Compatibility (EMC) problem, and the Genetic Algorithm (GA) in the software Ansoft HFSS platform was used to optimize the first resonance frequency of heat sink.

Research work on the thermosiphon layout design of transmission line pile foundation in Geermu permafrost region was performed by finite element method and the influence of thermosiphon layout design on the temperature of soil around pile foundation was calculated and analyzed. The numerical calculation results indicated that the cooling effect of thermosiphon was obvious, but the coolling effect varied with the difference of thermosiphon layout design. The more thermosiphon bars were laid out aound pile foundation, the lower the temperature of soil around pile foundation. The cooling effect of thermosiphon on pile foundation and soil became weaker and weaker with the increment of the horizontal distance between soil and thermosiphon-pile. The layout design of 12 thermosiphon bars was the best for the transmission line pile foundation in permafrost region.

With the development of power system, the main unit is gradually becoming larger and larger, thus length of time that large generators after experiencing disturbances in power grid needed to adjust and maintain the stability is more important than ever. Generator out-of-step prediction which is a part of security and automaticity equipment of power system, sends out the corresponding operation instructions in order to keep the whole system stay stability, according to the initial system state and fault severity. The paper analyzes and classifies several schemes and principles on generator out-of-step prediction. The actual advantages and disadvantages are pointed out. At last, the development of out-of-step prediction is also presented.

Transient Stability Assessment (TSA) aims at assessing stability of power system operation state quickly. This paper introduces rough set theory and clustering analysis to assess power system transient stability. At first, the stability operation parameters and fault places are taken as feature attributes based on the trait of power system transient ability. K-means algorithm is used to make continuous attributes among feature attributes discrete. Then feature attributes and stability types are taken as conditional attributes and decision attributes respectively. Initial decision table is established. Finally, rough set theory is used to form final decision table and rules of TSA are obtained. The IEEE 9-Bus system is employed to demonstrate the validity of the proposed approach.

With the development of ubiquitous computing, augmented reality (AR ) technology has become an important research direction. For its Unique properties, it can be used in many engineering areas, especially in biomedical engineering. In this article, we mainly summarized the technical feature and technological superiority of the AR technology, and gave some applications and effectiveness of AR-based biomedical Engineering. This will be helpful for those who are eager to use this brand new technology in medicine.

Project financing of ESCO is the key link to conduct EEEB. The more scientific project financing strategies are affected by some inner factors, such as financial situations in a corporation and corporate business objectives, and involved by some external factors, such as project status, marketing character of energy saving service market and constraints by policy and law. From the analysis on reciprocal action between inner and external factors, financing cost, financing risk and income from investment are the three main factors to choose an appropriate financing mode. ESCO can implement project financing by enhancing enterprise competitiveness, improving the market climate and fostering a normative policy and law environment.

According to the principle of the train longitudinal dynamics, the heavy haul longitudinal dynamics nonlinear model is established to analyze the influences of the load distribution pattern and the locomotive position on train longitudinal dynamics. The study of this paper is divided into two parts. The first, train model is composed by a locomotive and six trailers, researching the influences of the load distribution pattern on train longitudinal dynamics, the analysis results show that, the best load distribution pattern is the descending from head to tail of the train, in this case, the coupler force is minimum, and the train longitudinal dynamics is best; the second, train model is composed by two locomotives and five trailers, researching the influences of the position of the locomotive on train longitudinal dynamics. The analysis results show that, if the first locomotive is at the head of the train, then the second locomotives best position is at the end of the train, in this case, the coupler is minimum. But the train longitudinal dynamics performance is the worst with two locomotives are located in the head.

Through simulating the process of vehicle running over humps in CarSim, calculating and analyzing the body vertical acceleration, the wheel load and wheel ground adhesion index for the car with different speeds that runs over road humps having different height and width, so as to obtain the effect of height and width of the hump on the deceleration performance and driving safety. According to the comparative analysis of the body acceleration, wheel load, wheel ground adhesion index, so as to obtain the best speed limit range of the road hump.

The complex force of the auger stem in soft coal seam is taken as the research object. Then the three-dimensional model of spiral pipe is established in the SOLIDWORKS software, and introduced into the workbench simulation platform of ANSYS software to simulate the stress distribution of the screw drill pipe in actual working conditions. According to the results of the analysis, the conclusion is that the stress concentration is around the pin hole of the female joint and the fatigue life of spiral drill pipe is 280.72 x 10 3 cycles.

A model is established to research on the applicability of network protection in theory. In this model, distributed power generation with constant power (PQ) control mode which is equivalent to a voltage control current source is taken as the research object. Fault ride-through control theory is used to analyze the influence on the network protection exerted by three-phase short-circuit fault. In this paper, the equivalent model of the distributed generation is offered firstly. Then the three-phase short-circuit fault characteristics are illustrated based on the equations of the access points voltage and the distributed generations current. In the end, a simulation model is built to verify that the network protection can be applied to settle the three-phase short-circuit fault in the distributed network with distributed generation.

Take the rice and wheat combine harvester threshing device as an illustration, utilize the idea of modular design, adopt the method of functional analysis, the threshing device is divided into different modules. Combining the parametric modeling technology, and use Solidworks Software as Platform, the modularization design of the harvester is fulfilled by partitioning and combining the modules, which provides a solution to the fast allocation of different combine harvester.