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As a new type of micro device, the reliability of thin film thermocouple sensor is very important in actual work. Aiming at a thin-film thermocouple sensor with NiCr as the functional layer, three main stresses of the thin-film sensor in actual work are analyzed: thermal stress, vibration stress and centrifugal stress. Various stress analyses have been verified through theoretical calculations or finite element simulations. The results show that thermal stress is the main influence stress, and the critical areas of reliability have been obtained. The prepared thin film sensor samples were tested through high temperature experiments, and the analysis results were verified. When a thermal load of 700 degrees Celsius is applied, the stress environment of the protective layer, the functional layer and the insulating layer of the structure is severe, and it is vulnerable to severe damage, and cracks are found in the insulating layer, which becomes a weak area of reliability.

Aiming at the reliability of thin-film thermocouples applied to turbine blades at high temperatures, combined with high-temperature tests and finite element analysis, this paper studies its failure mechanism and thermal stress under thermal load. Multi-layer thin-film thermocouple samples were prepared on ceramic substrate, and high-temperature tests were carried out under different temperature loads, and the phenomenon of film shedding and cracking was observed using electron microscope. This paper analyzes the failure mechanism of the film sensor based on the function and structure, and uses ANSYS to analyze the thermal stress distribution of the film under high temperature load. Combining several existing theoretical models, this paper analyzes the factors affecting the thermal stress of the film and conducts simulation verification.

For the thin-film thermocouple with ITO/In2O3 as the functional layer, the mechanical reliability of their composite multilayer membrane structures under high temperature and random vibration conditions are discussed. Using the elastic plasticity model based on the finite element simulation method, the stress and strain distribution patterns caused by the thermal mismatch and vibration of multilayer film materials are systematically analyzed, and the distribution of the stress concentration and strain accumulation regions that may lead to fatal reliability problems are characterized. When a thermal load of 1000 °C is applied, the protective layer of the structure is vulnerable to severe stress environment. In addition, plastic deformation occurs in the adjacent layers of the functional layer, making it a weak reliability area. The stress generated by the vibration load is much smaller than the thermal stress, which mainly occurs at the roots of the structure, where prolonged loading may lead to fatigue failure.

With the development of aero-engine with high specific flux, high thrus-weight ratio, and high turbine inlet temperature, it is an effective way to improve the cooling efficiency by designing dense gas film holes on the blade surface of the turbine blades, especially at the intake side. However, the introduction of gas film holes destroys the geometrical integrity of the blade structure, resulting in a multiaxial high stress state of the blade material around the small holes, which seriously affects the strength and life of the cooling blades. In addition, the geometry design of the gas film holes also directly affects the temperature and the oxidation rate of the turbine rotor blades. In this paper, the researches on the mechanical properties and oxidative damage of the gas film holes at home and abroad in recent years have been systematically introduced. The effects of gas film holes on the durability and fatigue properties, the high temperature oxidation behavior of single crystal superalloys, and the thin-walled effect of oxidative damage of gas film holes have been systematically described.

In order to improve the efficiency of solid-liquid separation, dewatering and filtration, as well as to reduce the loss of concentrate and production costs, silicon carbide porous ceramic filter plate with high porosity and high bending strength was prepared by using the particles close packing method adding proper amount of adhesives and sintering additives at 1450 oC. The porosity of the fired samples was evaluated by Archimedes law. The morphology and properties of the samples were characterized. Effects of SiC grains gradation, pore formers content, molding pressure and soaking time on the bending strength and porosity of ceramic filter plate was studied. SiC porous ceramic composition was prepared by mixing 90wt% and 10wt% SiC powders with D50 of 200.7 μm and 312.6 μm, respectively, 4% walnut powder as pore former and 5% Kaolin clay as binder. The sample was pressured at 8 MPa and fired at 1450 oC for 30 min, and endowed with 6-8 μm of the average pore diameter, 41% of the porosity and 11 MPa of the bending strength, respectively, which is especially not easy to plug hole. The obtained results can be applied in ceramic filter core parts for heavy metal concentration.

The high temperature ultra-high cycle fatigue (UHCF) behaviors of DZ125 superalloy used in aero-engine turbine blades were systematically studied. The results show that the fatigue fracture still occurs above 108 at the frequency of 20kHz, R=-1 and 700°C. There is a negligible frequency effect for the DZ125 superalloy, therefore, it is proposed that the ultrasonic fatigue testing could be expected as an accelerated fatigue testing method. Fatigue cracks originate from the subsurface of the specimens, where have no metallurgy defects or “fish eye” character. The crystal orientation change of the alloy is very little after fatigue.The maximum value changed for the elastic modulus of the alloy is about 30GPa after fatigue compared with that before fatigue.

As a lightweight, fast, airtight, flexible foundation pit supporting structure, lasson steel sheet pile has obvious advantages of short-cycle and low-cost during the construction of double track railway abutment. However, the influence of insertion and extraction of steel sheet pile to original lines is also very big. Therefore, timely backfill grouting, settlement displacement observation and propermaintenance are needed.

A torsional dynamic model and testing model for planetary geared systems are established to study the effects on its vibration characteristics as substituting plastic gears for steel ones successively. The dynamic model is solved by using variable step Runge-Kutta method and the vibration testing experiments for four kinds of combined planetary geared systems are carried out under different rotation speed and load torque. The numerical and experimental results show that the high frequency spectra are suppressed effectively as substituting plastic gears for steel ones. The gear mesh dynamic load and vibration intensity caused by the meshing fundamental frequency and side-frequency reduce markedly when the plastic ring and planet gear substitute for steel ones together. The numerical simulations have a better consistency with the experimental results, which verifies the correctness of the conclusions.

High loess slopes are easily unstable because of the water sensitivity of loess, therefore, the study on stability of high loess slopes is a very important task for water and soil conservation on loess plateau. Forcus on the inefficiency of current graphic method, after considering main influencing factors of stability of high loess slopes, such as lithology, topography, groundwater conditions, slope water content and seismic intensity, etc., on the basis of graphic method, an automatic table lookup program was developed, moreover, the interfaces of graphic method were compiled based on MATLAB platform, which could automatically generate plenty of obvious characteristics of slope data for further modeling.

An advanced LED multi-die-bonding integration using a fluidic self-assembly technique is proposed in the field of flip chip packages. Different form the conventional pick-and-place methods for a single LED die bonding, the fluidic approach is a relatively new design and a batch process, which can achieve not only die self-alignment but die self-assembly. Here, the size of LED die is 1-mm-square chip with the thickness of 0.3 mm. Due to the smaller size of LED die, the die-bonding process is still in need of finding a suitable approach and breakthrough. In this study, our design of fluidic self-assembly device is based on the experimental test and simulation results. The device design is the gas-flow channels with the magnetism. The width, height and length of each gas-flow channel are 1.1 mm, 0.5 mm, and 1 cm, respectively. With the restriction of the channel width, this structure design can control well to die self-alignment. In addition, the design of two circular structures in the channel can form a flat rim to achieve the die self-assemble. This mechanism of fluidic approach can be useful to the LED die self-alignment and self-assembly in the future batch processing.

In the present research, the influence of the adhesive thickness on the cohesive properties and the overall strength of metallic adhesive bonding structures were investigated with the cohesive zone model to equivalently simulate the adhesive layers with various thicknesses. A theoretical approach was developed to determine the cohesive parameters for the present model when the adhesive thickness varied. And then some numerical examples were given to explore the adhesive thickness-dependence overall strength of the adhesive joints, followed by the comparison with the existing experimental results. Furthermore, the variations of both the cohesive parameters and the overall strength with the various thicknesses were influenced by the ductility of adhesives, which were investigated finally. The results showed that both the cohesive parameters and overall strength of metallic adhesive bonding structures were dependent on the adhesive thickness. Moreover, the variation of overall strength corresponding to brittle adhesive was more remarkable compared to that of ductile adhesive, especially in the comparatively small thickness range.

This paper studied the effect of the ratio between the axial tensile force and the transversal vibration loads on the fatigue behavior and failure mode of the near alpha titanium alloy TA11, to simulate the service stress state applied on the engine blades, where a large centrifugal force is superimposed with bending vibration loads. The plate-like specimens were used in the fatigue tests by a special testing device which was designed and fabricated in the present research,where the vibration loads were applied by the electro-magnetic exciters. By experiments under various multi-axial fatigue loading cases with different ratios between the axial tensile force and the transversal vibration loads, the fatigue behavior and failure modes were observed and compared. Then, the energy based fatigue criteria were applied for correlation of the test results. The fatigue properties of titanium alloy TA11 under the specialized loading conditions are characterized and discussed. In addition, the experimental observations on the vibration behavior superimposed with different magnitude of axial tensile force are also helpful for understanding the real working conditions of the engine blades.

Quantitative fractography is the important tool for evaluating the fatigue propagation life about material research and manufacturing process perfect, it is very useful in the circumstances that crack expands inside of the material or the crack cannot be observed because of the hidden part of the component. In-service components are usually suffered different load spectrums, and the fracture characteristics are combined created by random load spectrum and block spectrum, which are beach marks, small beach marks and fatigue striations. The most important thing for fractography quantitative analysis is to confirm the parameter used for evaluating the fatigue life and determine the relationship between the parameter and load spectrum. The relationships between different fracture characteristics and load spectrums are analyzed, and the selection means of characteristic parameter for different load spectrums are proposed. This paper also discussed a case of fatigue propagation life estimation of some aircraft lower wall panel suffered in-service aircraft flight load spectrum.

In traditional way, the segmentation of image is conducted by simple technology of image processing, which cannot be operated automatically. In this paper, we present a kind of classification method to find the boundary area to segment character image. Referring to sample points and sample areas, the essential segmentation information is extracted. By merging different formats of image transformation, including rotation, erosion and dilation, more features are used to train and test the segmentation model. Parameter tuning is also proposed to optimize the model for promotion. By the means of cross validation, the basic training model and parameter tuning are integrated in iteration way. The comparison results show that the best precision and recall can up to 97.84% in precision and 94.09% in recall.

Purpose：By investigating the variation of the human walking gait kinematics with respect to the foot deformation constraint, prove that bionic design of feet are the necessity for biped robots to imitate human walking better in terms of flexibility, stability and efficiency. The results will be significant for future research and development of biped robots. Methods: A human being was assumed as a perfect biped robot which had ideal motion drive and control. The walking gait parameters of two healthy men with foot deformation unconstrained and constrained were tested respectively by the inertia motion capture suit, and then they were processed by programming and analyzed by comparison. Results: The data analysis showed that when subjects walked with foot deformation constrained, their angular displacements of lower limb joints generally increased, the curves of angular velocity and accelerations fluctuated in certain walking phases, the walking pace and stride length decreased obviously, the single support phase shortened while the double support phase lengthened. At the same time, subjects felt subjectively that their body motion was less flexible, the walking posture was difficult to control, and the walking stability was more strenuous to keep. Conclusion: Combining the logical analogies with the detailed experimentation results, it is inferred that biped robots with rigid feet will have to suffer awkward and unstable walking gait, heavier and strenuous steps, and lower energy efficiency while walking. The paper concludes the necessity of bionic design of the robot feet for improving the walking quality of the biped robots. The conclusion and the experiment data will be of significant value for future work of robot design and evaluation.

This paper applied Contingent Valuation Method (CVM) to estimate the recreational value of Urban Park— “219 park”. The economic value analysis of recreational activities will technically enrich the connotation of part management, which can benefit the transition of recreational activities and resource management from extensive to intensive; by compared the two results, it will also provide a important references on rules and measures for government and relevant authorities.

Silica sphere has wide applications not only in the field of physical chemistry dealing with dynamic behavior and stability of particulate systems, but also in industries including catalysts, ceramics, pigments, pharmacy, etc. However, the control on the particle size is a key factor in the preparation process of silica sphere. In this paper, silica sphere with uniform sphere morphology and amorphous structure was prepared by a sol-gel method, and the control of particle size was emphatically studied. The results showed that the particle size of the as-prepared silica sphere was obviously influenced by the raw materials concentration. The average size of the product increased from 0.66 μm to 0.90 μm when ethanol concentration increased from 7.14M to 9.55M, increased from 0.50 μm to 0.90 μm with the increase of ammonia concentration in the range of 1.88M to 2.36M, and increased from 0.47 to 0.90 μm while tetraethoxysilane concentration increased from 0.08M to 0.11M. Further study indicated that the silica particle size was also influenced by reaction temperature, it increased with the increase of temperature from 26°C to 28°C, and decreased with the further increase of temperature in the scope of 28°C to 32°C.

Acoustic principle of ultrasonic measurement for stress field was introduced briefly. Longitudinal critically refracted (Lcr) wave was applied to study a non-uniform stress field in high strength 7050-T7451 aluminum alloy. Error sources of testing were investigated as well. The results indicate that ultrasound can be conveniently used to characterize non-uniform stress field with sufficient accuracy but without destruction. The measuring results represent mean stress existing in propagation path of ultrasonic. Stress field mapped by ultrasound has good coincidence with actual stress field. Temperature and coupling are main error sources of testing. As long as temperature maintains invariable, it is easy to characterize stresses with error less than 40 MPa even in different coupling condition and with other artifical variable. The measurement error induced by coupling was tolerable and reduced with increasing stress. This technique will provide a non-destructive method to measure residual stress in structures.

The application of Bayesian estimation methods in the measurement of composite performance is studied in this paper. At first, the traditional measurement method of the composite performance and its disadvantages are described. In addition, the Bayesian method is reviewed and the Bayesian estimation theory is briefly introduced. Then the hardness of the compound interface of 42CrMo-ductile iron composite is obtained by applying the Bayesian estimation theory. In this way, the method has been extended.

A generator bearing temperature measuring system is designed, based on the LabVIEW8.6 and virtual instrument technology, in this paper. The hardware and software implementations of the system are introduced. The system is tested and analyzed both in algorithm of linearity and filtering effect. The experimental results show that the proposed system has good characters of good stability and high accuracy, which are valuable in engineering application.

Multilayer films containing carbon nanotubes and redox polymer were successfully fabricated on a screen-printed carbon electrode using layer-by-layer (LBL) assembled method. UV-vis spectroscopy and electrochemical method were used to characterize the assembled multilayer films.

Scheme for the implementation of wavelet filter using switched-current (SI) circuits is presented in this paper. The circuits are composed of analog filter bank whose impulse responses are the first derivative of Gaussian and its dilations. The transfer functions of the basic wavelet filter can be given by Pade approximation. Therefore wavelet filter can be conveniently implemented by SI circuits. Simulated results indicated a good performance of wavelet filter.

Eddy current stimulated thermography is one of the advanced nondestructive testing (NDT) methods, which integrates eddy current and thermography together to take advantages of two typical NDT techniques. The theoretical basis of eddy current stimulated thermography was discussed first. After that, the experiment system was introduced in detail, including the system structure, coil design and selection of test parameters. Experiment and simulation results were presented. The infra-red (IR) images obtained by experiment and the temperature distribution images captured with simulation study were analyzed using feature extraction. The features of the IR images and the simulation images show that eddy current stimulated thermography could be applied to identify and diagnose damage of metal component. The probability of application of eddy current stimulated thermography was discussed as well.

Seismic liquefaction is a major geological hazard of earthquakes. In the paper, the earthquake liquefaction of subway engineering in GUANGZHOU is calculated based on the standard penetration test method according to the rules of code for seismic design of buildings, specifications of earthquake resistant design for highway engineering, code for water resources and hydropower engineering geological investigation as well as the railway engineering anti-earthquake design specification. It is concluded that different code have very different result on sand liquefaction discrimination. And the data selection is a key factor when we discriminate sand liquefaction. The shortage of codes is evaluating the site liquefaction according to the data of points. The conclusions have positive role for engineering seismic liquefaction discrimination and the seismic liquefaction mechanism research.

Low cycle fatigue failure tests of the powder metallurgical nickel based superalloy FGH96 at 550°C and 720°C were carried out under total strain-controlled mode (R=-1). The fatigue failure behaviors were investigated by analyzing cyclic stress response and observing microstructure after fatigue through scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). The results show that FGH96 superalloy exhibits cyclic stability at 550°C, and cyclic softening afterwards at 720°C with Δε/2=0.4% , and of cyclic softening at 720°C with Δε/2=0.7%. After high temperature low cycle fatigue, the γ′ precipitates are cuboidal for all samples. No coarsening of γ′ precipitates was detected at 550°C and at 720°C with Δε/2=0.4%, but small γ′ precipitates get together to be larger precipitates at 720°C with Δε/2=0.7%. EBSD shows that the continuous small angle grain boundaries are produced during the fatigue. The small angle grain boundaries have a significant increase at 720°C, especially that case at Δε/2=0.7%.

Four main phases in Ca-Bi-O systems, Ca6Bi6O15, Ca4Bi6O13, CaBi2O4 and Ca5Bi14O26 were prepared by solid-state reaction method. UV-visible absorption spectra show that the samples of CaBi2O4, Ca4Bi6O13 and Ca5Bi14O26 have visible-light reactivity with the band gap of 3.08 eV, 2.76 eV and 2.60eV, respectively. The results of SEM and BET measurements indicate that CaBi2O4 has the morphology of flower-like nanostructure and the high BET surface area, while Ca6Bi6O15, Ca4Bi6O13, and Ca5Bi14O26 have the morphology of particles of various shapes with a diameter from 200 nm to 2 μm and low BET surface area. CaBi2O4 was found to be a most efficient visible-light-driven photocatalyst in degradation MB. This work may deepen the understanding of the relationship between the photocatalytic properties and the crystal structures in Ca-Bi-O system.

A series of bulk polycrystalline samples of La0.6Sr0.15Na0.10.15MnO3( represents vacancy)with Ag addition were prepared by conventional Sol-gel reaction processing in air.The mol proportion between La0.6Sr0.15Na0.10.15MnO3 and Ag is 1:x (x=0.00,0.016,0.04,0.1). This article focuses on the impact of Ag doping on the parent structure, magnetic properties and magnetoresistance. We have gotten the following experimental results:X-ray diffraction patterns show that a weak Ag phase appears when ;The Curie temperature of the doped samples is higher than that of the matrix sample and it reduces as x increases. The resistivity of the doped samples is bigger than that of the parent sample in zero field and it increases as x increases.In a quite wide temperature range (207K-286K), MR maintains the value of 5.08% (0.20%) when x=0.04. So the CMR temperature stability has been improved.

Room-and-pillar mining method plays a dominant role in gypsum mines, which owns a low resource recovery ratio and has left many gobs leading a series of safety production problems to mining enterprises. To get an utmost resource recovery and avoid gob collapse, a secondary utilization scheme has been made by feasibility analysis and theoretical calculation. In this scheme, theoretical calculation about the occurrence conditions of mining damage has been done, and the deep research direction of the mining damage mechanism in gob-effect gypsum mines has been pointed out. This research and its train of thought could provide the gob-effect gypsum mines with reference that would increase ore recovery ratio and prevent mining damage.

In order to anlysis the rock deformation characteristics in influence of mining disturbances, water pressure and crustal stress, a multi-physics coupling model is created by Comsol4.2a in this paper. By debugging mining steps and water pressure, the model simulated rock stress and deformation characteristics.the results showed that: (1)the water pressure is fixed conditions, the plastic damage scope in stress concentration zone where was formed by mining disturbanceis were greater than the mining floor,and with an extension of the scope of mining, the scope of plastic failure zone in the rock surrounding which including the vertical and horizontal was increased; (2) Stope width is fixed conditions,with the water pressure increases, resulting in the surrounding rock mechanical strength decrease, and increase the scope of the plastic collapse and plastic damage within thefault zone intensified.

The process of injection molding, packing and cooling for injection mold PET (Polyethylene terephthalate) cavity was analyzed and the cause of fatigue stress cracking was investigated. An analysis method of injection mold cavity fatigue based on Ansys Workbench(AWB)was put forward. A simulation of temperature field, displacement, thermal stress field and fatigue life for the cavity of a work cycle based on heat transfer theory was completed. Provide effective measures to avoid fatigue stress cracking and optimization design of the injection mold.

Magnetic suspension vibration isolators have attracted significant attention in the field of semiconductor industry and high precision equipments. However, it is impossible to levitate an object by only permanent magnet due to instability of permanent magnets. It needs a guide device or active control to hold the magnetic suspension passive vibration isolator (MSPVI) at equilibrium position. In order to overcome the instability of the permanent magnets, the linear bearing, rubber O-ring and rubber membrane are applied in the MSPVI. The transmissibility of the MSPVI was calculated and subsequently measured. The experimental results show that the MSPVI can achieve low natural frequency with the help of the rubber membrane which is superior to the linear bearing and o-ring. Beside, the vibration isolating performance of the MSPVI is measured. The experimental results reveal that the MSPVI achieves the lowest resonant frequency when the load capacity of the MSPVI reaches maximum value.

In order to anlysis the rock stress and deformation characteristics in influence of mining disturbances, water pressure and crustal stress, a multi-physics coupling model is created by Comsol4.2a in this paper.By debugging mining steps,the model simulated rock stress and deformation characteristics: under mining disturbance and water stress affect, the rock stress and displacement is basic to its original state when roadway away from the fault is greater than 205m, but the rock stress and deformation displacement increased significantly at the contact surface of fault and coal seam when coal lane away from the fault is less than 105m,and the stress gradient increased significantly between the fault and the mine roadway. the paper determine the 105m as the "critical distance".

According to the national standard on electric vehicle model, pulse input test and random input test were conducted. The results show that: at different speeds through the triangular bump, its maximum acceleration is far less than 31.44m2/s, there is no harm to the driver's health; random input road ride comfort simulation trials has similar results, with the improving speed, the acceleration rms value of the driver's seat increases, but the driver will not feel uncomfortable. In addition, it was analyzed the influence of front and rear suspension spring stiffness and vibration-damper damping on the vehicle ride comfort, and increasing or decreasing of each parameter affect the trend on the vehicle's ride comfort.

The rheological stress behavior and microstructure change of high silicon nickel-copper alloy NCu30-4-2-1 during high-temperature compression were studied with a Gleeble-1500 thermal simulation tester. Based on the results, extrusion tests were carried out and a suitable extrusion temperature and extrusion rate range were determined. At these extrusion parameters, the success rate can be significantly improved; in addition, the extrusion bars have superior properties, such as superior strength, hardness, wearing resistance, high-temperature resistance, corrosion resistance, bonding resistance, dimensional stability and machinability.

This paper designs a visible human-machine interface for field computer in an agriculture vehicle navigation control system. Field computer, with the function of system configuration, vehicle configuration, steering configuration, job management, path planning and map views, is the human-machine interface in agriculture vehicle navigation control system. This paper introduces the design of map views including field view and machine view for field computer system based on coordinate conversion. Field View gives a bird’s eye view of the map. The agriculture vehicle moves while the map keeps stationary. Machine view keeps agriculture vehicle in center of screen, while the map moves along the reverse direction of the agriculture vehicle.

Spinel Zn2SnO4 photocatalysts have been prepared by the solid state reaction. as-prepared samples were characterized by power X-ray diffraction, scanning electron microscope, UV-vis diffuse reflectance spectroscopy and photocatalytic activity measurement. The results show that the reaction temperature have significant effects on the Zn2SnO4 photocatalytic activity . It has also been found that the distribution of the cations in Zn2SnO4 crystal lattice changes with the increase of calcination temperature, causing the local structural fine adjustment that associated with the photocatalytic properties.

The electromagnetic characteristics of rock and ore play an important role in resources, engineering and environmental fields. The high frequency part of rock electrochemical impedance spectroscopy can reveal its crack characteristics according to the test results and rock physical model and equivalent circuit. The mathematical foundation of high frequency part of rock electrochemical impedance spectroscopy is studied, and the ideal Nyquist figure is obtained from that, and the response characteristics of rock electrochemical impedance spectroscopy volume arc are been proofed. It provides the theory basis for further study rock electrochemical detection technology.

The paper studied the effect of water flow pattern on the treatment of disorderly discharged sewage in tidal rivers by bio-film process. The results indicated that biomass was greater under the fluctuation turn flow than under the folding flow around. Under the fluctuation turn flow, the concentration of COD was 168mg/L and the removal rate of COD was 37.1%. Under the folding flow around, the concentration of COD was 187mg/L and the removal rate of COD was 29.4%. The results indicated that the removal rate of COD was higher 7.7% under the fluctuation turn flow than under the folding flow around. The reason was that under the fluctuation turn flow, soft packing fiber was derided by water, and the effective use of surface area was great and microbial growth space was large.

The author chose five kinds of commercial resins for blank experiment and then added oxidants.We studied that how removal rate changed under different temperature and picked the D001-cc as the best supporter in desulfurization procedure. And heteropolyacid was supported onto D001-cc with different loadings,the results showed 30% was the optimal condition.

Investigation of polymer resin as catalyst in the oxidative desulfurization (ODS) process has revealed that the method can be applied to make a relative high removal of sulfur compounds. The reaction conditions, including temperature, amount of oxidant and reaction time were studied. The best result occurs under mild conditions with respect to room temperature and atmospheric pressure, to remove 75.54% of the totle sulfur content in the presence of H2O2 with an O/S molar ratio of 17. Possible mechanism is also disscussed.

Oxidation of chemical warfare agents (CWAs) such as Sulfur Oxidation of chemical warfare agents (CWAs) such as Sulfur Mustard (HD) and Soman (GD) and their simulants 2-chloroethyl ethyl sulfide (2-CEES) and dimethyl methylphosphonate (DMMP) in supercritical water were studied by a batch reactor. Results showed that HD, GD and their simulants 2-CEES and DMMP could be effectively destroyed into their corresponding mineral compounds by supercritical water oxidation (SCWO). The mineral ratio was a function of reaction temperature, reaction time and oxidant concentration. But reaction temperature seemed to have more important effect on the mineral ratio than other two factors. Sulfur compounds 2-CEES and HD could easily be mineralized under 475°C and the inorganic products were mainly SO32- and SO42- , while complete oxidation of organic phosphorus reactants GD and DMMP needed a high temperature of >600°C. And under relatively low temperature, DMMP tended to form a white organic phosphorus polymer with P-C and P-O-P bonds. Results also indicated that P-F bond was more easily broken than P-C bond.

As an effective method of disposal for animal manure, Scientific and economical biogas engineering plays an important role in accelerating construction of eco-agriculture, and also protecting eco-agriculture environment. Meanwhile, there are some problems related to technic and policy with large-scale biogas engineering, which seriously influence its development. So, this paper took Qionglai city as an example, summed up the present status, existent problems of intensive culture and biogas engineering, which based on analyzing the inherent relations between the scale of pig farming and disposal capacity of biogas engineering. It also expected the developing potential of large-scale biogas engineering.

There will emerge cracks or damage due to the action of rock pressure or its own shortcomings and low strength for the lining structure in tunnel or underground engineering, especially at the places of excessive bending moment and tensile stress because of bias pressure where concrete will be pull apart for the deficiency of strength even to cause leakage and durability insufficient. Conventional maintenance and reinforce methods are time-consuming and laborious, and the effect is also not ideal. It is simple, timesaving and having a significant and lasting effect to use carbon fiber reinforcement method. This paper studied structure’s failure mechanism and on the basis of that the principle of fiber-plate reinforcement from the angle of structural plastic development, then studied the improvement of structure’s mechanical character and the change of design calculation method for single section of underground structure with carbon fiber plates by using the research method of plane-strain. At the same time, the typical model of integral failure for single section was analyzed and the calculation method and formulae of bearing capacity and reinforcing steel bars were deduced, which remedied the shortfall in the design specification for concrete structure. In the end, by comparing the calculation results of structure with fiber plates and that with not fiber plates based on engineering example, the conclusion that structure’s bearing capacity and capability of resistance to deformation had obvious improvement was obtained.

An explicit nonlinear analysis was implemented to calculate buckling load and stress distribution, based on the Abaqus/Explicit computer program. According to the numerically obtained results, we can optimize the structure of the PET bottle in order to increase the buckling load. Moreover, according to the stress contour of PET bottle obtained by Abaqus, plastic distribution of PET bottle was optimized in order to improve the PET material efficiency and reduce the weight of PET bottle, and which provides a new design ideas for lightweight design of the PET bottle.

The influence of the heat loss of hot runner on the stability of mold injecting process was analyzed. Determine the lost power of heating elements by establishing of hot runner system. Using ANSYS codes to calculate the temperature control equations and get the temperature distribution of hot runner plate. Make the structural arrangement of heating pipes and thermocouples better and ensure thermal equilibrium of the hot runner system by analyzing the temperature field.

The regulation of stress concentration generated by the edge effect of shrink fit is studied in this paper. Firstly, experiment is designed with Latin hypercube (LH) method; then the maximum compound stress of the shrink fit is obtained by means of FEM; at last, the relationship among the maximum compound stress, shrink range, dimensional sizes of the shrink fit parts and material properties is fitted into a empirical formula via BP neural network. The formula is capable of offering good forecast to the maximum compound stress, and makes up the deficiencies of the design of shrink fit by using elastic mechanics (EM). At the end of this paper, the shrink fit of the drive axle housing is optimized with the empirical formula, and the maximum compound stress is abated greatly on the condition of ensuring the normal use of drive axle housing.

Display speed is one of the important factors in NC simulation system. It is very difficult to meet the requirement of the continuous animation by full-redraw mechanism. An algorithm for part-redraw mechanism, based on OpenGL stencil buffer and the display area defined twice, is delivered. When the algorithm is put into use in NC simulation system, the top surface of the workpiece can be represented as a set of triangle grids, especially, the number of the triangle grids exceeds millions of magnitude, the display speed is increased from (2.109±0.10)f/s to (57.826±1.00)f/s.

Ceramic-supported manganese dioxide catalyst, MnO2-ceramic, prepared by impregnation- precipitation method and calcined at 350 degree C, was exposed to flue gases to investigate the catalytic oxidation of sulphur dioxide in flue gas at seawater buffering system. The results showed that compared with acid treated ceramic, MnO2-ceramic gained 2%-46% higher Desulfurization efficiency in temperature range of 15-75 degree C. MnO2-ceramic exhibited 57% desulfurization efficiency at its favorable temperature (60 degree C) while ceramic showed 11% Desulfurization efficiency at 60 degree C. MnO2-ceramic was found to catalyze S(IV)oxidation even at low pH (pHx-ceramic. SEM-EDS and XRD indicated that the good catalytic activity of MnO2-ceramic at low temperature could be attributed to high dispersion of MnO2 on ceramic support. The high performance of MnO2-ceramic on the SO2 removal appeared to be promising in the seawater flue gas desulfurization industrial application when high sulfur coals were burned.

It is important of rock crack fine test for deep rock engineering. The high frequency part of Nyquist diagram of rock electrochemical impedance spectroscopy reflects the rock volume change characteristics, which can express the change information of rock internal cracks. With the topological theory, the topological characteristics of Nyquist diagram of sandstone, mudstone and granite are researched. The results show that the electrochemical impedance spectroscopy diagrams which come from the same size sample using the uniform test are isomorphism, and which can express using the same function. It shows the rock electrochemical process is regularity. At the same time, topological separation of rock electrochemical impedance spectroscopy diagram is researched. Fine change of rock crack can be detected with topological separation.