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In this paper, we study a kind of method which using DSP processor to control the reactive power compensation of generator. In the main circuit, power electronic switching devices on all control type (IGBT) is used as the main device of inverter, and controlled by SVPWM technology on and off to produce pulse. The generator to a digital signal processor as the core processor, the processor can quickly complete the data processing and real-time data sampled signal calculation tasks, the power system to achieve a fast response of the dynamic compensation, given the various modules of the system program flowchart.

According to the requirements of the high temperature flameless catalytic combustion burner ignition and intelligent control, the author designed intelligent electronic igniter with microprocessor controlled. Intelligent electronic igniter is controlled by Freescale MC9S08GB60A microcontroller chip and the thermocouple is used as a temperature sensor. It also combined with high-voltage ignition circuit and the solenoid valve control circuit to achieve real-time temperature monitoring of high temperature flameless catalytic burner control ignition, flame cut off valve and other intelligent control.

Current OTS (Online Test System, OTS) of airborne electrical equipments in the environments of mechanics is only able to test statically but dynamically. To solve the problem, a new kind of dynamic test system based on PXI bus is designed. In the design, modular instrument resources that used in the third generation of ATE (Auto Test System, ATE) commonly is adopted to prove the system’s reusability, extensibility and standard ability, digital signal acquisition is replaced with analog signal acquisition to realize dynamic test, support from the method of process monitoring is drew to get the capability to detect the reversible failure in UUT (Unit Under Test, UTT), VC++ language is used as the software development tool to control the system and record test data. In the special mechanics environment such as centrifuge, drawing lessons from the experience of the new concept dynamic test, the system architecture of remote control acquisition is used to prove the stability and efficiency of the test system greatly. The experimental result shows that the system runs well and has more advantages such as high efficiency of auto-test and reliability of failure diagnosis results, meeting new demand of the airborne electrical equipments’ online test in the environments of mechanics.

As the excavation of tunnels, there are new channels of the groundwater drainage. The original supply of the circulatory system has been destroyed. The effects of groundwater to rock mass of surrounding rock are aggravated. In this paper, combined with a new highway tunnel project, the model is built according to the design parameters and the site engineering geological conditions of the tunnel. The fluid-structure interaction module of the finite difference software FLAC3D is used for the research on tunnel excavation. The distribution of seepage field, the stability of surrounding rock and rock deformation under saturated conditions during the tunnel excavation have been analyzed. The simulation results have certain guiding meaning on fracture development, the stability design of tunnels in water-rich stratum and the design and construction of anti-drainage.

How to efficiently evaluate the dynamic changing sea-battlefield is the key of command decision. According to research sea-battlefield situation assessment based on improved decision tree algorithm based on derived attributes. First is based on the decision tree algorithm to establish the sea-battlefield situation assessment initial decision tree. Second are dynamically generated derivative branches set based on derived attributes. Once again, it can be grafting and pruning derivative branches to form the sea-battlefield situation assessment derived decision tree model. Finally, it may use a derived dynamically decision tree model assess sea-battlefield in different time slices.

System sensitivity is an important basis for carrier aviation support system design and improvement. According to research presented fuzzy network analysis (Fuzzy-ANP) to achieve sensitivity analysis of carrier aviation support system. The first is based on ANP method to establish sensitivity analysis network model of carrier aviation support system, followed by the application of fuzzy theory to determine the weight of sensitivity analysis index, and finally enter specific technical parameters based on secondary subsystem or device of carrier aviation support system, sensitivity analysis, corrected analytical model, proposed carrier aviation support system design suggestions.

In this paper, a single-phase grid-connected photovoltaic (PV) inverter topology consisting of an H-bridge circuit, an inductive filter and a transformer interfacing the grid is considered. To improve the quality of the grid current and eliminate low order harmonics caused by the inverter’s dead time, a strategy of adaptive harmonic compensation method is proposed, and the parameters related are designed. The experiment results show that the proposed method has a good effect to mitigate low order harmonics and can improve the quality of current injected to the grid.

The multipath in the inter-spacecraft microwave ranging system is the short-delay multipath generally. The performance of existing multipath mitigation algorithms degrade in the short-delay scenario, and therefore an adaptive filtering algorithm based on variable step-size LMS is exploited for estimating the parameters of multipath signals. Firstly, the equation of variable step-size LMS is deduced. Then, the signals parameters are estimated recursively though the adaptive filtering algorithm. Multipath elimination is performed by substracting the estimated multipath effects from the measured correlation function. Simulation results validate that the proposed method is superior to the existing algorithms in the aspect of convergence rate and ranging accuracy for the short delay multipath. Therefore, it is a viable solution for achieving high accuracies measurements in microwave ranging system with short-delay multipath.

The autocorrelation function of Composite BOC(CBOC) signals has many side-peaks, which leads to the ambiguous problem. To solve this problem, an improved two-stage unambiguous tracking scheme is proposed in this paper. In the first stage, an unambiguous correlation function with narrow main peak is constructed by combining four out of twelve sub-correlation functions. In the second stage, by adding the rest of sub-correlation functions, the final correlation function with sharper and higher main-peak is developed based on the preparatory function from the first step. Numerical results demonstrate that compared to the original methods, the proposed scheme has a better tracking performance and can effectively suppress the short delay multipath.

The parametric model of product is the foundation of implementation product series design. In order to solve the data conflict problem of product series design in the process of parametric modeling, a parametric modeling method of product was proposed based on the directed graph. Product, components and parts was expressed by vertex, and the driven relationship of parameter for model was expressed by directed edge. The process of product parametric design was analyzed and reconfigured by the structure directed graph of product parametric model. The structure directed graph of product parametric model was divided into a number of sub-graphs, and those sub-graphs were combined to directed trees of the parametric model of product. The parametric model of product was achieved to support product series design. So product parameters was droved from top-down so as to improve the efficiency of modified and reuse of parametric model of product and convenient to operate within the model. As an example, the series design of the Gatling gun proved the applicability and effectiveness of the method, and the method can meet with product series rapid design

For the problem of poor transmission stability in HF channel, we builted a frequency optimization model based on the HF dynamic frequency optimization technology with working frequency, communication distance and time as dynamic elements ,with the type of antenna, the sunspots as static elements, choose the best working frequency set for communication according to the geographical location information, avoid interference channel effectively by real-time monitoring, and make sure communication service has always been on the best working frequency. Further enhancing the the validity and reliability of HF channel transmission.

In order to get a quantitative and simple supporting scheme of deep foundation pit, this paper creatively develop a simplified method of supporting system selection based on the fuzzy optimization theory. The simplified method determines a preferred equation of the supporting system at first. Then the best solution is selected based on the preferred equation. Based on the simplified method, the analysis of the foundation excavation for Chuangye Dasha in Taiyuan has been performed. The result of the analysis shows that the method is reasonable and scientific.

In order to study the influence on the different parts of the cavern by joints, the three-dimensional model is built by Patran and then calculated with FLAC3D after meshing. Seven working conditions about different inclination of joints (0°15°30°45°60°75°90°) are considered in the calculation. The results show that low dip joints in vault and steep joints in the sidewall are more dangerous. Therefore, some measures should be used when encountered this situation in this project.

Jiu-Jiang Yangtze River Highway Bridge, with a main span of 818m, is another long span hybrid girder cable-stayed bridge which connects Jiang Xi province and Hu Bei province in China. Steel box girder is adopted in main span and north side span, and main girder of south side span and south tower nearby is designed of concrete box girder. The pylon is concrete structure, with the height of 242.3m and H-shape. There are 216 cables used in this bridge, of which are assembled by parallel strands. Jiu-Jiang Yangtze River Highway Bridge began to construct in 2009, and was closed in December, 2012. The bridge opened to traffic officially in the next year. Design concept, construction method and vibration control measures about Jiu-Jiang Yangtze River Highway Bridge are introduced in this article.

Taking BaiYu county Ouqu river basin landslide control in Ganzi state of Sichuan province as an example, study the whole design process of lattice frame anchor structure. Firstly, according to the geological conditions and technical code for design, safety criterion for landslide control is confirmed. Secondly, by making use of the features of lattice frame anchor structure this can protect slope and retain stability of landslide together with its small space between beams and light anchor. Finally, the advice and request for construction is specific ally put forward.

This paper developed a intelligent control system that can fertigate according to crops’ requirements. At first, the overall composition of this system was expounded. It used kingview 6.55 and measurement and control center software as the development platform, and HORNER OCS as the core controller, and it constructed agricultural fertigation control system. The communication module is GPRS DTU, and the system pressure adjustment was achieved by frequency converter. Secondly, related technology such as communication protocol, port mapping, dynamic DNS and peanut shells software was introduced. The system software development, database design and public based on the Internet was completed. The system test results show that the system was fully function, stable running, and met actual demand of water and fertilizer management in agriculture.

In the present work, a new composite gold-supported chitosan-silica (Au/CS-SiO2) nanomaterial has been synthesized via organic modification and chemical reduction method. Firstly, the hybrid chitosan-silica (CS-SiO2) material was synthesized by modification of silica with chitosan under suitable reaction conditions. Furthermore, based on the ligand effect of chitosan molecule and the reduction ability of organic alcohols and ascorbic acid, gold nanoparticles were generated and fixed on the surface of hybrid CS-SiO2 material, which successfully leading to production of the composite Au/CS-SiO2 nanomaterial. The obtained samples were characterized by the infrared spectroscopy, X-ray diffraction and transmission electron microscopy. Moreover, thermogravimetric analysis was also used to examine their thermal stabilities. It was found that the reducing agent is closely related to the size, shape and amount of gold nanoparticles, and the modification of chitosan decides the stability of the material. These materials can exhibit promising application as the catalyst in chemical field.

Shape memory materials are materials with special functions set of sensing and actuation in one. The shape memory alloy is one of the most important materials in shape memory materials. Shape memory alloy is a kind of alloy that alloy with initial shape in low temperature by the plastic deformation and fixed into another shape, by heating to a temperature above the critical, can be restored into the initial shape. The characteristic of shape memory alloy mainly has the shape memory effect and super elastic effect. Nickel titanium memory alloy is not used in the fracture of limbs, in recent years are also used in the spine and femoral head fracture. Nickel titanium memory alloy has good biocompatibility, and has the characteristics of super elasticity, low magnetic, wear resistance, fatigue resistance, corrosion resistance, as a novel material for internal fixation in the treatment of sports injuries are widely used.

s: It is a catastrophe for the whole nation to the Lushan earthquake. This earthquake not only had caused the devastating destruction to the social economy, peoples lives and property, but also destroyed the national eco-system, changed the preliminary geomorphic, led to the casualties of the wild animals and plants. Simultaneously, the giant panda which is viewed as the peoples friend and the national treasure cant escape the catastrophe in the earthquake. The Sichuan Giant Panda Sanctuary lies in the earthquake-stricken area. The giant panda were viewed as the endangered species by the International Union for the Conversation of Nature and Natural Resources (IUCN) and were chosen as the emblem of the World Wide Fund for Nature (WWF), symbolizing natural conservation and world wildlife protection. After the Lushan earthquake, the giant pandas were given enormous concern by the UNESCO world heritage center. Therefore, it is very important to investigate to destroy the Sichuan Giant Panda Sanctuary by the earthquake. This work could benefit us to know about the damaged natural ecosystem, the extent of damaged Sichuan Giant Panda Sanctuaries. It had the great significance to protect the giant panda and to put forward the strategies for the restoration and reconstruction of Sichuan Giant Panda Sanctuaries.

To simulate the impact response of the moving body in the permanent magnetic actuator, this paper takes the magnetic force of the moving body at different positions as one of the input loads for the impact simulation, which avoids the coupling calculation of the magnetic and impact problem. The static and transient analysis of the magnetic field in the permanent magnetic actuator are implemented respectively to compute the magnetic flux density and their relative errors, results show the moving body in this magnetic field exerts little influence on the magnetic intensity and the influence can be neglected. The force of the moving body with respect to its position can be calculated in the static analysis and then be imported into the impact calculation to obtain the velocity and displacement. By comparing these results with the ones from the magneto-mechanical coupling transient analysis, the difference is small which proves the feasibility and accuracy of the proposed method.

In this paper, the discrete memoryless multiple-access wiretap channel (MAC-WT) with non-cooperative encoders is studied, where two users (cooperation between the users is not allowed) transmit their corresponding confidential messages (no common message) to a legitimate receiver, while an additional wiretapper wishes to obtain the messages via a wiretap channel. The inner and outer bounds on the capacity-equivocation region are provided forthis new model, and the result is further explained via a binary example.

t is analyzed of the effect of the bed form change on the cross section flow measurement and calculation in the flume with the sand ripple bed or smooth bed. The reason is researched that the flow measurement error is caused by the river bed ripple. The Correction method is analyzed under the condition of different discharge and riverbed morphology. So the support is provided in order to improve the physical model discharge measurement accuracy.

The boot method of three wound-rotor asynchronous motors and three-phase squirrel-cage asynchronous motor are described; As to reduce the start current and to increase the starting torque, the principle of all kinds of startup methods are analyzed; the advantages and disadvantages of various starting methods are evaluated; Development directions of modern motor startup are pointed out.

The existing routing algorithm of Wireless Sensor Networks (WSNs) pays more attention to the energy efficient. However, Quality of Service (QoS) supported and the validity of packet transmission unveil additional challenges. Based on the Particle Swarm Optimization (PSO), this paper presents a trust QoS routing algorithm for WSNs. Hierarchical structure is adopted and the trust value of the node is constructed with the direct trust value and the indirect trust value. In addition, delivery delay and packet loss are considered as main QoS metrics. Finally, under the optimization ability of PSO, the proposed algorithm tries to find the route with maximum residual energy and reliability in order to maximize network utilization as well as meets QoS constraints. Compared to typical routing algorithms in sensor networks, this new algorithm has better performance.

Qiansimen Bridge is a partial cable-stayed bridge with steel truss girder under building in Chongqing city, China, which will carry 4 vehicle lanes and 2 urban rails. Several general erection schemes of the steel truss are proposed and compared. Based on this, the erection scheme of steel truss at the non-cable area near the tower, the side span area and of the standard segment are discussed, which could be referred by for similar engineering.

This paper illustrated the drought resistance strategy, analyzed the profile, characteristics, development tendency and the cause of the drought in Guizhou Province. And the paper analyzed the major measures and achievements of the drought resistance emphatically to provide a reference basis for Guizhou drought resistance.

Ship-based aircraft how to scientifically reasonable and efficient configuration involves many complex factors, according to the study based on ship-based aircraft configuration expanding backpack theoretical optimization program. First, based on the operational capability of the ship-based aircraft to achieve the concept of the basic unit, to determine the basic configuration of the ship-based aircraft program to achieve a balanced and comprehensive defense capability; followed by analysis and to quantify the typical tasks threats, fuzzy decision evaluation model based on AHP method to build the basic unit of the ship-based aircraft mission capability; finally, based on generated expand backpacks theory the ship-based aircraft configuration program, and the use of genetic algorithm for efficient optimization.

Permeable groyne is an innovative type of traditional groynes, Netherlands have accumulated some experiences on this field during the practice on the Rhine and Jamuna river (Bangladesh). This paper summarized the present study results of permeable groynes and inspired by it, proposed an supplementary alternative for the river training work in the Lower Yellow River.

In this paper, an automatic tape vulcanizing tank hoisting manipulator is designed to improve the accuracy and the efficiency in tape vulcanization. The hoisting manipulators control system takes Siemens S7-200 PLC as the core. By controlling two frequency converters and a solenoid valve, the hoisting manipulator not only movs along the Y-axis and Z-axis also clamps the vulcanizing mold. In addition, the hoisting manipulator communicates with the vulcanizing tank through PC / PPI bus and the RS232/485 interface port on PLC, achieving linkage production.

In this paper, the gears fault signal in the engine was studied. Hilbert-Huang transform was applied for the gears fault signal analysis. From the experiment, the normal engine frequency of 240 Hz was got and the gears fault signal frequency concentrated in 2800 Hz. Through the study of intrinsic mode function and the Hilbert spectrum, improper meshing gears were the cause of this problem. The results showed that this method can effectively extract the fault feature and found out the cause of the problem. A new effective method is provided for the gears fault diagnosis.

The temperature prediction in blast furnace loses accuracy or Forecasts failure when the temperatures change is at normal levels and obvious. This paper introduces fuzzy membership of samples basing on support vector data description and the fuzzy least squares support vector machine to forecast the blast furnace temperature. Then the simulation was done by using the forecast samples and the model after training by MATLAB. Comparing the simulation results of LS-FSVM with LS-SVM, the model basing on LS-FSVM enhances anti-jamming ability. The accuracy of the temperature prediction in blast furnace promotes significantly when the temperature of blast furnace fluctuates.

The organization and performance of Cu-0.4Cr-0.2Zr-0.15Mg alloy after solution treatment at 960°C for 2h, and then cold-rolled to deformations of 80%, finally aging treatment from 400°C to 500°C in argon atmosphere for various periods from 4h to 16h prior to air cooling were analyzed. Eventually the optimum process was aging at 475°C for 16h. At this process condition, the alloy had an excellent comprehensive mechanical properties and conductivity property of the tensile strength, elongation, and electrical conductivity reaching 549MPa,15% ,and 82.34%IACS respectively. The microstructure of alloy with the best aging process was analyzed by SEM and EDS and TEM shows that the separation phase distributed diffusely on matrix. the main separation phase is Cr phase which mainly exists as simple substance form after age treatment ,the fraction Cr phase forms intermetallic compound with Cu,Zr,Mg. The other phase (as Zr,Mg) exists as intermetallic compound form. The Zr phase doesnt exist as simple substance form.

The application of soft-switching techniques is an important way to reduce switching losses of DC/DC converter. Aiming at the requirement of electric vehicles application, major soft-switching techniques for DC/DC converters are reviewed. Performance and design limitations are discussed. A comparison of soft-switching techniques used in high power converters of electric vehicles is presented. Through analyzing the state-of-art and existing deficiency of soft-switching techniques for DC/DC converters, it is concluded that power level upgrading, soft-switching range extending and auxiliary network simplification should be focused in the future.

Wind speed forecasting is of great significance to the improvement of grid stability and the reduction of operating cost. Because of the high volatility of wind speed, the accuracy of current forecasting methods have yet to be improved. This paper established a time series-state transition model to solve this problem, which uses state transition to revise the results of time series forecasting. The improvement in accuracy is proved by the analysis of a practical example.

A serial of numerical experiments were conducted with four representative sand and dust emission schemes using an integrated numerical simulation and forecast system of dust storms. The comparison between the simulation results and the observation data shows that the vertical dust flux and the dust concentration of the scheme developed by Marticorena and Bergametti is the biggest, while those of the scheme developed by Lu and Shao is the smallest. The simulation effect of the dust emission scheme developed by Shao is similar to the observation, so the dust model system of Shao is preferably used to predict the dust events in China.

The reliability of MEMS has been a key issue for its application. Micro-cantilever is a basic structure of MEMS, which has a notable influence on its reliability. Basing on quasi-static theory, the response characteristic of the slanted Micro-cantilever under shock load is studied. Assume that the slanted micro-cantilever is a cantilever-mass system, whose maximal displacement and stress has been analyzed. Furthermore, the correction of theoretical analysis is validated by ANSYS simulation. Finally, experiments are carried out to validate the cantilever’s characteristic of shock response. The results can be used to guide the failure modes analysis of MEMS, and provide rules for MEMS reliability design.

To deal with the power system static voltage security issues, this paper provides a power system low voltage risk assessment model. We constructed a low voltage consequence severity model by combining the utility function and node importance, and set up a low voltage evaluation index based on risk theory. The validity and reasonability of the model are proved by the IEEE14 bus system.

At present, cable transmission is used mostly in the coal mine safety production monitoring. Cable transmission mode has many shortcomings, for example: wiring complex, line dependence of strong, installation and maintenance cost more. Badly working conditions of coal mine underground increase the difficulty of the wiring. In order to solve the cable transmission mode existing problems and the insufficiency, this paper analysis wireless sensor node which use in the coal mine underground and the functions of its modules characteristics and performance requirements deeply .And design wireless sensor node of coal mine based on STM32W108 chip, research emphatically each function module of the working principle. It also presents the hardware platform of the overall design scheme and hardware circuit diagram and software flow chart.

It is the foundation for evaluating the reliability of transmission lines to obtain and analyze the original reliability parameters. However, these parameters depend on long- term statistic and calculation. In the case of lacking such parameters in a new project , this paper proposes a method of Principal Component Analysis to obtain the principal component of the impacting factors ,in which various factors affecting reliability parameters are taken into account. Through this method, we can use PCR to obtain the failure rate of the unknown transmission lines on the base of the known credible lines’ rates. The simulation results show that the proposed approach possesses higher forecasting accuracy and provides references for the power system dispatching departments and transmission lines maintenance departments.

In this paper, we studied voice signal with Gaussian noise reduction. Based on signal analysis and reconstruction principle. Application of Hilbert-Huang transform(HHT), analyzed voice signal with Gaussian noise. And comprised with wavelet transform(WT), obtained the correlation coefficient between HHT noise reduction signal and excluding the noise signal was 0.8986, WT was 0.7889. The results showed that in the voice signal with Gaussian noise, compared HHT and wavelet analysis correlation analysis values, HHT noise reduction ability was 10% higher than WT. This paper provided a new analytic method to the voice signal noise reduction and enhanced the accuracy of it.

In order to study the questions about the recognition of relative position for the operating object and calculation of the object volume in the loading robot binocular stereo vision system. Based on the characteristics of the operating object, proposed the method that use of its vertices only to match the corresponding point of the camera imaging for location identification, also raised the approximation algorithm that firstly, cut up the whole, followed by calculate the volume of the various parts, then carry out the sum of the each segmentation volume. Experiments and analysis showed that the distance of camera and the object greater affect the visual system, less impact on the intensity of light；In the target object segmentation， the number of partition k=11 is better. Both methods produced the small errors for the visual recognition of the system, it can meet actual needs.

Targeted at key technological difficulties of pre-stressed concrete bridge with precast segment assembling in short-line matching method, combined with the as-built projects and those under construction, this essay introduces systematic segmental precast assembly externally prestressed concrete construction technology in short-line matching method, and the developed serial complete equipments set, thus realizing development trend of factory-orientation, large-scale, mechanization, standardization of modern bridge construction.

As a new type of deep water offshore foundation, suction caisson is widely used to offshore structures. However, the current methods of evaluation and design cannot meet the increasing requirement of engineering practice. In this dissertation, the studies are emphasized on finite element method for analyzing the suction caisson bearing capacity behavior and the failure mechanism under the vertical load. Based on studying the vertical bearing behavior of caissons with different ratio of length to diameter L / D, it shown that as L / D increases, the vertical bearing capacity growth slowed.

Escherichia coli and Bacillus subtilis as objects of the study, ultrasonic fragmentation acted on the bacterial cells in different growth stages, results showed that, it’s similar to the crushing effect of ultrasound on E. coli and B. subtilis cells of different growth stages, the highest crushing rate in the logarithmic phase, reached to 95.8% and 94.3% respectively, the crushing rate of adjustment phase is lowest, maintained at around 60%, the crushing rate stability cell was centered, which can be achieved 90%. The structure of the bacterial cell wall didn’t the main factor to decide the ultrasonic fragmentation effect, but different growth periods of bacterial cells did the determinant.

To ensure the secure buried depth of the subway tunnel which was routed underneath the Fenghuahe River, a two-dimensional tidal current and sediment transportation model was established to simulate the maximum scour depth of the riverbed. The conclusions were shown as follows: the most disadvantageous hydrologic condition was a combination of the 200-year return period flood in the Fenghuahe River and the 5-year highest tide in the Yonghe River. The maximum scour depth of the riverbed above the subway tunnel was 1.19 m and the lowest elevation of the riverbed cross-section was -8.56m. The results could provide technical support for the safety of subway design.

Based on mining area end slope stability evaluation engineer- ing of Pingshuo East open pit coal mine in Shanxi Province, ac- cording to the status quo of the North Slope of the first mining district of the East open pit coal mine as well as engineering g- eological investigation results, this article selected a represen- tative cross-section of the North Slope,adopted processing fu- nctions of finite element analysis software MIDAS/GTS, and re- spectively analyze slope stability under three conditions of the mining area of the initial excavation,backfilling and disposal,a- nd follow-up excavation.The paper concluded that Initial exca- vation caused slope instability; backfill slope is stable after di- sposal; follow-up excavation has essentially no effect on slope stability. The establishment and analysis are much closer to t- he real situation, objectively reflect the distribution of slope s- tability of the East open pit coal mine, and provide a design for open pit production safety.

By method of TIG, under certain welding craft conditions, two kinds of welding wire were added,1Cr18Ni9Ti and 2Cr13 steel were welded. By (ZEISS) OM, SEM, the microstructure of two kinds of 2Cr13 and 1Cr18Ni9Ti welding joints were observed and analyzed, by electronic universal tensile machine, mechanical properties of welding joints were measured. The results show that 2Cr13 and 1Cr18Ni9Ti welded joints is typical columnar crystal, the microstructure is lath martensite + residual austenite + carbide; the micro-hardness of two kinds of welding joint changes fluctuantly, it increases firstly and reduces secondly, the value is up to max in welded joint zone. The welding joints filled in two kinds of materials, tensile samples rupture forms are toughness rupture; plasticity and strength of welding joint filled in ER308 welding material is better than that of welding joint filled in H1Cr21Ni10Mn7Mo welding wire. On the contrary, its hardness is lower than that filled in H1Cr21Ni10Mn7Mo welding wire.

The improved MT-NT combination method has solved the issue of failure or interrupted of solving when it is used in the Petroleum chemical enterprise production process. In this paper the judgment of the variable coordination credibility was added, corresponding processing was made in the measurement, and a more cautious handling was taken on the measured variable that may cause significant error. The experimental results show that this method is more suitable for application and actual production process. The MT-NT combination method has a higher accuracy and integrity in the detection of significant errors, with the advantage of both eliminating the defect of missing appreciable error and improving the calibration results. As a result, the method is more suitable for application and actual production process.

Using penetration resistance methods detect the wall’s mortar strength to masonry structure where in ecological farm of Sichuan Emei, and then obtain the date of field trial. We have calculated the mortar actual strength according technical specification for testing compressive strength of masonry mortar by penetration resistance method, and compare the calculated results with compression tests result, testing specimen from the engineering project field. So we obtain true mortar strength of engineering and corresponding appraisal conclusion.

We designed a kind of irrigation control system based on PC and C8051F by ourselves, which was finished by implanting C8051F microcontroller in MATLAB fuzzy logic toolbox to design fuzzy control program and the fuzzy control results were simulated by SIMULINK，PC was planted in WINCE6.0 embedded operation platform, and used C# to develop software, it has the functions of observation and operating database, etc. The system achieved the purpose of fuzzy controlling by using microcontroller technology and embedded technology.