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In order to investigate the influence of coating layer characteristics on the dynamic permeability and printing of ink-jet paper, coating was prepared by the precipitated calcium carbonate (PCC) and white latex used as bottom coating (recipe label:A,B),and coating formula was made by silica (SiO2) and polyvinyl alcohol used as surface coating (recipe label:a,b,c).Then paper were coated respectively on single bottom, single surface and multilayer. Then the dynamic permeability and printing of ink-jet paper were analyzed systematically. The results showed that whether single layer or multilayer, the values of Ct, Ci were minimum when the ration of pigment and adhesive was 70:30, because the hole diameter of the coating layer was smallest, and the absorption was strongest, so the dynamic permeability was best, and the ability of ink absorption was best, color density and tone reproducibility were best. It concluded that when the proportion of SiO2 and PVA was 70:30, the dynamic permeability and printing ability of ink-jet paper were relative better.

The work investigates the different situations of navigation measurements coming from multiple heterogeneous sensors using nonlinear sequential filtering techniques to enable a small spacecraft formation to autonomously navigate in the proximity of small bodies. Non-collaborative, part-collaborative and collaborative cases are investigated to find a simple and robust method which can achieve the best navigation precision. The sensor failure is taken into consideration to assess the navigation performances. The results show that the inter-spacecraft measurements make great contribution to autonomous navigation performance and the part-collaborative navigation strategy achieves the best estimation.

This paper introduces the characteristics and distribution of sulfide ore cassiterite, an overview of the re-election of sulfide ore cassiterite flotation basic skills and status, and the use of tin resources and sorting technology development proposed sulfide ore cassiterite Prospect.

This paper introduces the research on the beneficiation of a low-grade barite ore taken from Myanmar.Through the analysis of the ore properties and research on the flotation experiment, the optimum flotation conditions are determinedwhile the ore sample assays 64.32% BaSO4.Under the flotation conditions of the grinding fineness-200 meshes 80%, sodium oleate 800g / t and sodium silicate 500 g / t, “two-time roughing,one closed cleaningand open in the second cleaning operations” is applied, and two marketable barite concentrates can be obtained. The concentrate 1 and 2 contain 96.32% and 91.26%BaSO4 at the recoveries of 91.94% and 5.25%, respectively.

This paper elaborates the beneficiation methods of barite, flotation reagents and different types of mineral processing of barite.

The tailing sample containing 17.11% Fe was subjected to this experimental and taken from Yunnan. After a series of beneficiation tests, the iron concentrate assaying 58.65% Fe at a yield of 11.48% was obtained by process flow – weak magnetic and strong magnetic discarding tailing in advance, rough concentrate regrinding and weak magnetic – table recleaning, and ultimately realized the effective recycling of iron.

The design optimization of tolerance is researched to improve the robustness of plane dimension chain. The nonlinear functional relationship between the closed loop and the component loops of a dimension chain is formulated. The tolerances of component loops are regarded as design variables. The total manufacturing costs of the component loops and the success rate of assembly of the closed loop are treated as constraint conditions. Then, a robust design optimization model is established to minimize the variance of the closed loop and to make the mean value of the closed loop approach to target value. The evidence theory is used to deal with the constraint condition on the success rate of assembly. The dimension chain of a gear box is taken as an example to illustrate the proposed method and the example shows that the proposed method is effective.

The electronic part of the metal tube rotameter which is based on the magnetic sensors and microcontroller C8051F005 is studied. The flow rate change causes the change of the floats position in the metal tube and leads to rotation of the coupling magnet. Then the change of magnetic angle is detected by the magnetoresistive sensors, and a signal is generated. The signal is processed by the electric circuit and made available for the microcontroller for sampling. Then it will has linearization fitting in the microcontroller and finally has a output. This system could automatically sample the flow signal, calculate the instantaneous flow rate, and display them on the LCD screen.

A new scheme that FSS applies in chipless RFID tag is proposed. The bandpass cross-slot FSS cell is used in the chipless RFID tag based on the spectrum signature as the resonator. The chipless RFID tag successfully performs 6 bit in 3-9GHz, the test result of S12 is-11.9~-14.3dB. The whole tag could be completely printed and the cost could be quite low. The size of the whole tag is 24.5*9cm2.

A continuous deformation measurement system of two dimensional granular materials displacement based on digital image correlation method (DIC) has been build up. Direct shear tests have been performed on standard sand in a special laboratory apparatus with different vertical pressure. Using DIC a pairs of consecutive photographs taken during the tests has enabled fields of displacement velocity and strain to be determined. Assumed the proportional of stress and strain, the direct observation of displacements and principle strains has been possible for a series of force of grains under shear at various stages in the direct shear test.

College students have become the mainstream of the user Android intelligent mobile phone market. However, there are only few platforms based on Android for college students to study and communicate. Through the analysis of the demand situation, this paper studies and develops the campus digital library reading communication platform based on Android. Using the Java Web technology, Android application development technology and WiFi network environment, the system meets the functional requirements of the students learning and communication.

In this paper, the rule of index weight is determined by analyzing the existing rules of life assessment for concrete. Based on fuzzy decision making of binary comparison, the weight of different factor taking effect in complicated environment can be analyzed. With known effects of each factor, the classification and score of concrete durability can be made. Thus the assessment of concrete durability in complicated environment can be modeled. The model is used to predict the service life of concrete and provide optimize mix proportion design.

As a burgeoning survey approach, 3D laser scanning is currently more and more applied in traditional architecture survey. In the surveying practice for Tianwang Hall of Hangzhou Haichao Temple, by skillfully setting the targets, we efficiently and accurately collected relevant surveying data with 3D laser scanner. On this basis, utilizing jointed point clouds on inner and outer surface, we successfully obtained wall thickness, roof depth, and other data that could not be precisely captured through traditional surveying measures. Moreover, the width, height and size of main beams were also easily and accurately acquired. So far, 3D laser scanning has become a very effective measure in traditional architecture surveying.

Based on the result of heat balance test,first law of thermodynamics and the second law of thermodynamics,the energy analysis and exergy analysis was made for the deoxidization-distillation process to study the energy efficiency of deoxidization-distillation process in titanium sponge combination production technology.The results of energy analysis show that high temperature physics heat of by-products MgCl2 to be used for better is the main direction of energy-saving.The results of exergy analysis show that reducing internal heat transfer and exergy loss of irreversible reaction is the key to save energy in deoxidization-distillation process.

With the Rapid Development of Mobile Internet Technology, People Hope Access to Internet to get Information and Service Anywhere and Anytime Urgently. Catering Industry also Hopes to Expand the Scope of Business to Network. in this Paper, through the Requirement Analysis, Using the Currently Popular Android System as the Platform, the Authors Study the Mobile Ordering System Based on Android with the Help of Mobile Internet Technology. the System was Considered the Relationship between the Customers and the Sellers, had Established a Perfect Management Mode and Comprehensive Ordering Function, and Realized the Characteristic Function Based on Google Service. the System is Low Cost, Simple Operation, and Mobility. it Solves the Catering Industry’s Problems of High Cost on Manpower and Inconvenient Online Ordering.

The run of mine ore grade of Burma is 47.83%. According to the nature of the ore for the corresponding process, and the conditions of the test to explore, abstain to use a combined flowsheet for low magnetic separation - spiral chute - high gradient magnetic. The ultimate index for comprehensive grade of iron concentrate is 57.26%, at a total recovery of 83.07%, and obtain good experiment index.

Talcum is a common gangue with which sulphide ores are associated, it has an adverse impact on sulphide ores flotation and product index due to its high natural floatability. In this paper it takes talcum-bearing copper sulphide ores from DongChuan in Yunnan province as experimental samples, and a series of tests on depressing talcum in the copper suphide ore flotation were carried out. Results show that when took the composed CMC and sodium hexametaphosphate as depressant with respective dosage 200g/t and 300g/t, it obtained a favourableeffect. In addition, depression effect can get improved with the dosage of collector increasing properly, it shows that when took the composed CMC and sodium hexametaphosphate as depressant, it can make the flotation process stable.It employed rougher-scavenger-three cleaners system as the closed-circuit flowsheet, and attained a Cu concentrate product of whom grade and recovery is 16.16%, 78.78% respectively.The results might contribute to dispose some similar talcum-bearing sulphide ores in the future.

The run of mine ore grade of Gan Shang Yan is 47.83%, iron ore grade is higher, but harmful element sulfur and impurity silica content is relatively high. This experiment using a simple process low intensity magnetic separation-high gradient magnetic separation, for the ultimate index for comprehensive grade of iron concentrate is 58.41%, at a total recovery of 80.85%, and obtain good experiment index, the harmful elements and impurity content can meet the standard.

Based on characteristics of data distribution in the low dimension nature, this paper studies the effect of manifold embedding technology used in typical industrial data set analysis, and manifold learning theory was introduced into the visualization data mining to help get quick effective information in a large number of data. Cognitive process with the help of that information reduces the difficulty of analysis and improves the data utilization efficiency, having a high value in engineering application.

Taking 1 year return period wave data statistics of Cheng Dao sea area as an example, the wave-current flow hydrodynamic load acting on submarine flexible pipe was analyzed. According to the actual structure of submarine flexible pipe, ANSYS numerical model was established. Under the combined effect of internal operating pressure and transverse wave-current flow hydrodynamic load, the results calculated by numerical model shows that with the increase of transverse load, the bending deformation of flexible pipe increases linearly, and the stress of flexible pipe is almost constant.

A new approach was proposed to estimate the reliability of a machine component when the probability density functions of stress and strength can not be exactly determined or only finite experiment data of stress and strength are available. The conventional universal generating function was introduced and then it was extended to represent the discrete interval-valued random variable. The experimental data of stress and strength were formulated as two discrete interval-valued random variables. Based on the extended universal generating function, a discrete interval-valued stress-strength interference model was proposed. An approach was proposed to solve the proposed stress-strength interference model and it can be used to calculate the upper and lower bounds of the component reliability. An example was given to demonstrate the proposed approach. It is showed that the proposed approach is suitable to the reliability estimation of a machine component when only finite experimental data of stress and strength can be obtained.

The rotational frequency of large scale wind turbine is very low, so low order modal of drive-train in a horizontal-axis Wind turbine generator system (WTGS) needs special attention to avoid structural resonance. In this paper, with Lagrange’s equation, a three-mass drive-train dynamics of WTGS is modeled and analyzed. After comparing with the results by GHbladed4.1 and SIMPACK, we found that those results show little differences clearly. So the drive-train dynamics above is rational and the accurate analyses are fit to identify the crucial low order torsional modal of drive-train rapidly in WTGS. In addition, the anti-resonance frequency of the gear-train found by frequency response method can be very significant for vibration isolation of drive train in the wind turbine system.

There is a common problem during kill a well, which is how to quickly and accurately control the surface casing pressure according to the requirements for killing a well. A step-by-step exploration process is employed on operation sites. Continuously adjusting throttle valve to acquire surface casing pressure may lead to failure of kill operation because of its long time and low control accuracy. Obviously, if the calculation problems of throttling drawdown can be resolved,the relationship between drawdown and throttle valve opening can be found and the course of explorating can be converted into a straight course.Then the success rate of killing well can be improved. More importantly, this can make automatic controll of surface casing pressure possible. The paper built the calculation method of throttling pressure drop by theoretical analysis and verified the calculation method by adopting it into field test. The result has showed that the calculation method of throttling pressure drop coincides with experimental results and it can be used in engineering practice.

Through the investigation on the traditional houses of ancient village existing in Yubei village, this paper analyzed and classified the characteristics of the shapes and the technologies of the walls of traditional house and has described the factors that have influenced their generation and development. Basing on the construction technologies, from four different material of the wall such as boulder wall，brick wall，wooden board wall and plaster on bamboo slat wall, it has studied corresponding properties of materials, basic processes, construction principles, art forms and so on and it has researched on some methods and rules of construction of wall of traditional folk house in Yubei village.

A study on the decolorization of azo dye wastewater by sponge iron was carried out in order to establish a model of decolorization kinetics, and to investigate the effects of particle size of sponge iron, the initial pH of azo dye wastewater and reaction temperature on the reaction rate constant. The results showed that the decolorization processes of azo dye wastewater by sponge iron was first order kinetic reaction, and reaction rate constant presented high value on the condition of small particle size of sponge iron, low initial pH of azo dye wastewater and high reaction temperature.

Distributed control based on the cyclic pursuit strategies has been of much interest recently. This paper presents distributed control policies based on the simple idea of cyclic pursuit which only require relative measurements of position and velocity of neighbors. First, we study the mathematical theory of cyclic pursuit algorithm. Second, we present Virtual Beacon Guidance is integrated to improve the existing cyclic pursuit strategies to deduce a method of Cyclic Pursuit & Beacon Guidance. Finally, we assume two space missions to prove that the control laws can meet with satellites formation autonomous reconfiguration in various patterns. To this end, the formation can get reconfiguration and reorientation simultaneously. In particular, the mission of convergence to cyclic trajectory with the radius extended is proven by analysis and simulation results.

The Al-Si eutectic alloy solidified under normal pressure was prepared by vacuum Ar-arc furnace. The alloy solidified under high pressure was prepared by hexahedral anvil equipment. The two heavily etched samples were observed by scanning electron microscope. The experiments show that the eutectic silicon phase solidified under high pressure presents curved and near parallel lamellar crystal, and there is definite spacing between the layers, which was very different from that of solidified under normal pressure. So the eutectic growth mode of Al-Si alloy solidified under high pressure was put forward, which indicate that the growth mode of Si have been changed gradually from facet to non-facet under high pressure.

A fluorescent optical fiber measuring system used to measure the concentration of the mineral oil in water is put forward in this paper according to the mechanism that the mineral oil in watercan emit fluorescence when excited by ultraviolet light. The pulse xenon lamp is used as excitation light source, while the linear CCD is adopted as the fluorescent signal of photoelectric detection components instead of the traditional photomultiplier tube in the system, combining with the optical fiber sensor technology and weak signal detection technology. It also equipped with the data acquisition card to realize data receiving and A/D conversion, using micro computer to store and display the data. This in turn realizes the accurate measurement of the concentration of mineral oil in water. The fluorescence optical fiber measuring system that used to measure the concentration of the mineral oil in water has the characteristics of simply structure, high sensitivity, wide linear range, probe passive and so on. The experimental result shows that this method is completely feasible.

Based on conventional drive train model of wind turbines, a planetary gearbox with flexible supporting between gearbox case and nacelle base is considered, and the coupled dynamic model of the drive train system is derived. The gearbox inner vibration performances are evaluated under different flexible parameters by means of dynamic simulation. It is shown that natural frequencies of each shaft are drifting while damping and elastic coefficients changing. Analysis also reveals that the flexible supporting mitigates torsion vibrations of each shaft. To minimizing torsion vibrations, a new searching approach is used to find out optimal parameters of the flexible supporting. Simulation results show that dynamic torque loads of the drive train are reduced, which is useful to wind turbine structure design.

As pointed out in this paper that, for a common building material, it is relatively difficult to judge its green degree in comparison with that for a special function material because the judgment factors are comprehensive. The relevant factors which affect the greenness index such as physic expenditure, pollution, economic are analyzed and all influential factors are discussed. For the common building materials, their different inter-restrain factors are divided in administrative level and the weight of factors is determined according to the AHP theory. Meanwhile, the assessment scale and criteria for the factors, and the grading standard for the material green degrees are given in the paper. Based on the fuzzy comprehensive evaluation theory, a green degree evaluation model is established. Finally, the reasonability of the model is testified with the instances introduced in the paper.

In order to overcome some technical problems in 3D modeling and model interaction operation, a new geological reserves calculation method is proposed based on 3D entity model. Firstly, this paper discusses how to infer and link mine rock boundary lines and generate geological profile map with it the 3D entity model of ore body can be constructed. Then, the principle of geological reserves calculation is discussed in detail. The calculation results show that this method is of characteristic of high precision and easy operation compared with the traditional empirical formula and provides a new operation and design platform for engineering designers.

The basic ant colony algorithm is improved by introducing chaos model of Logistic and discrete search in order to improve the global convergence. A program of improved ant colony algorithm has been designed by using Matlab. It can be used for solving optimal design problems with continuous variables, discrete variables or mixed-discrete variables. For an electric circuit, the design problem about the robustness of electric current is discussed and a model of robust optimal design is established. The solution of established model is achieved by using the proposed method and the robustness of the electric circuit has been improved. The example shows that the proposed method is effective in engineering design.

A method to handle hybrid uncertainties including aleatory and epistemic uncertainty is proposed for the computation of reliability. The aleatory uncertainty is modeled as random variable and the epistemic uncertainty is modeled with evidence theory. The two types of uncertainty are firstly transformed into random set, and the limit-state function of a product is mapped into a random set by using the extension principle of random set. Then, the belief function and the plausibility function of safety event are determined. The two functions are viewed as the lower and the upper cumulative distribution functions of reliability, respectively. The reliability of a product will be bounded by two cumulative distribution functions, and then an interval estimation of reliability can be obtained. The proposed method is demonstrated with an example.