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The blade is one of the key part of aero engine because its shape precision and surface quality significantly influence the performance, efficiency and reliability of the engine. The blade surface is generally obtained by precision finishing process, which is a repeated work of profile error measurement, profile error calculation and error correction manufacturing. For profile error calculation, the matching of measurement points and ideal blade surface must be firstly performed. However there is few detailed work reported on matching algorithm. In this paper, a new matching algorithm for profile error calculation was proposed. Firstly, the coarse matching method based on characteristics of blade section curves between measurement points and its corresponding ideal section curve was studied. Then the Sigular Value Decomposition (SVD)-Iterative Closest Point (ICP) precision matching method was adopted to improve the matching precision. After that, the weight calculation method was applied to balance the profile errors among different section curves. Simulation work was performed to validate the proposed matching algorithm. Results shows that micrometer-order matching accuracy of the blade section curves could be obtained through the above-mentioned three matching steps.

High-precision aspheric surfaces are generally measured using interferometer with a computer-generated holograms (CGH), which has a wavy line pattern fabricated onto a glass substrate. CGH patterns are generally made using lithographic techniques that was developed for semiconductor industry. Patterns can be subsequently etched into glass substrate using reactive ion or chemical etching. The accuracy of the drawn pattern on a CGH decides the accuracy of the measurement. Draw pattern error mainly includes the line-width deviation and its position error. In this paper, the influences of defocus of drawing laser and the wet-etching processes on the line-width were firstly investigated. On the other hand, the position error under different line-width was obtained by analyzing the relationship of line-width error and the position error. Based on the above-obtained results, a CGH having a diameter of 80 mm and the minimum line-width of 1.8 μm was successfully fabricated. Testing results showed that the wavefront error was only 3.79 nm, significantly higher than the commercial-available ones. The fabricated CGH is expected to use in the high-precision measurement of asphercal surfaces.

Single phase CuO films have been successfully synthesized by thermal oxidation of cupper foil in air with water vapor. The structural and optical properties of CuO films were investigated. It is observed that the grain size increases with increasing the oxidation temperature. The optical band gap of CuO film is determined by the transmittance and reflectance spectra.

In this study, we investigated the effect of biochar on NH3volatilization and N2O emission in brown soil by using enclosed acid absorbing method and static chamber-gas chromatograph method. The results showed that without fertilizing, there was no significant effect of biochar effect on NH3volatilization and N2O emissions but if biochar was combined with urea, a dramatic mitigation of which could be found. Biochar application was supposed to regulate urea-N transformation more easily than soil nitrogen. Under the conditions of this experiment, both NB20 (20 t·hm-2of biochar and conventional nitrogen fertilizer applied) and NB40 (40 t·hm-2of biochar and conventional nitrogen fertilizer applied) treatments reduced NH3volatilization and N2O emissions significantly. By contrast of NB0 (single urea), the accumulated NH3volatilization and N2O emissions of NB20 and NB40 decreased by 15.6% and 24.4% and by 21.76% and 19.56% respectively. Under conventional fertilization conditions (NB0), 10.35% of nitrogen in fertilizer was lost in the form of NH3and N2O, and compared with NB0, NB20 and NB40 reduced nitrogen gaseous loss from fertilizer by 2.76% and 4.12% respectively.

Nowadays hydrogen as an important source of energy is still produced from fossil fuel processing largely, hence the separation of hydrogen from the gas mixture with high recovery ratio and purity arises as an important issue. In this paper we proposed a hydrogen recovery/production process from half-coke oven gas, and the material LaNi4.3Al0.7 was considered for use due to its low plateau pressure and good resistance to impurities. We use a Sieverts type volumetric apparatus to investigate the material properties,including P-C-T properties and hydriding/ dehydriding kinetics under different conditions. Based on the results obtained, the feasibility of using the material for gas separation purpose was discussed.Keywords: Gas separation; metal hydride; reaction kinetics; P-C-T properties; Sieverts method

Papain, pancreatin, pepsin, rypsin, neutral protease were used for the enzymatic hydrolysis of silk fibroin solution. It was found that the silk fibroin peptides after hydrolysis by pancreatin exhibited the strongest antioxidant activity, in comparison of five hydrolysed solutions by the pyrogallol method. The pancreatin hydrolysis process was then optimised. The optimum conditions of pancreatin hydrolysis antioxidant activity silk fibroin peptide was determined by orthogonal experiment: reaction time 160min, enzyme concentration 4%,substrate concentration 20mg/ml, pH 8, temperature 38°C. The best hydrolysis under the hydrolyzate on superoxide radical scavenging rate of 72.73%.

A Case Study of an airport terminal in a large steel works discussed how to install components in precise positioning to ensure the accuracy of the installation, the arc-shaped building also studied the design and measurement methods of measurement and provide for other similar projects a reference basis.

Semiconductors showing high efficient photocatalytic activity have attracted great interest, because they provide a potential solution to many environmental pollution problems that humankind is currently facing. This work reports on the sol-gel synthesis of Na2Ta4O11 nanocrystals and its photocatalytic performance toward Red G. The samples were carefully characterized by X-ray diffraction, transmission electron microscopy, UV-vis diffuse reflectance spectroscopy, and the Barrett–Emmett–Teller technique. By modulating the synthetic condition, the sol-gel reaction yielded pure Na2Ta4O11 nanocrystals with diameter of ~32 nm from the peak broadening of (006) plane using Scherrer formula. It is found that the as-prepared Na2Ta4O11 nanocrystals showed a band gap energy of 3.63 eV, which is much smaller than that of Na2Ta4O11 prepared by flux approach. The relative narrowed band gap energy of Na2Ta4O11 nanocrystals may predict superior photocatalytic activity. By careful photocatalytic test, it is found that Na2Ta4O11 nanocrystals showed excellent photocatalytic activity toward Red G. The photocatalytic degradation efficiency was estimated to be 94.0% within a time intervals of 40 minutes. Controlled experiment by adding active species scavengers gave evidence that the degradation of Red G is dominated by the oxidation reaction of the generated O2-∙ active species taking place on the surface of the photocatalyst.

Bagasse xylan chlorosulfonate was synthesized by the esterification between bagasse xylan and esterification agent which was prepared by the chlorosulfonation from chlorosulfonic acid and pyridine. The effect of reaction parameters such as reaction temperature and reaction time was investigated for esterification of bagasse xylan with chlorosulfonic acid by single factor experiment. The degree of substitution (DS) of Bagasse xylan chlorosulfonate was up to 1.41 when the reaction was performed at temperature 45°C for 4.0h. The IR spectrometry revealed characteristic absorption peaks of the S=O and S―O at 1121.78cm-1 and 803.20cm-1, and this explained that bagasse xylan backbone has been joined the sulfate radical groups and bases successfully. The microstructure of bagasse xylan chlorosulfonate was also investigated by SEM.

Aimed at achieving a high speed and precision circumferential positioning of pipe under low energy consumption, a paralleling hydraulic control of variable frequency motor and valve (PHC-VFMV) system is designed for the swing mechanism of segment erector. Firstly, with a view to the working principle of the swing mechanism, a hydraulic circuit of the PHC-VFMV is designed. Then, two sub-circuits of the hydraulic circuit are separately modeled and equipped with suitable controllers. Finally, one valve control (VC) system and the designed PHC-VFMV system are tested in AMEsim platform. Results show that, while guaranteeing a good performance of speed and accuracy, the PHC-VFMV could achieve a better performance in energy saving than VC.

Li2O-Al2O3-SiO2 glass-ceramics doped with Nd2O3 were prepared by the melting method. The effects of Nd2O3 on the crystallization behavior of Li2O-Al2O3-SiO2 glass-ceramics were studied by DTA, XRD and SEM. With the increase of Nd2O3 content, the glass crystallization temperature arised. The SEM result indicates that the main crystal phase of Li2O-Al2O3-SiO2 glass-ceramics doped with Nd2O3 is β-quartz solid solution, for without doping Nd2O3 it is β-spodumene solid solution. These results shows that the crystallization temperature increases significantly by doping Nd2O3, and phase transition from β-quartz to β-spodumene is suppressed. The grain size increases with the increase of Nd2O3 content.

The mechanism of the increased crystallization stability (the difference between glass incipient crystallization temperature and transition temperature) of Sb2O3 —doped vanadium phosphate sealing glass investigated by X-ray photoelectron spectroscopy (XPS) is reported in the present study. Experimental results showed that after doping with Sb2O3, the rate of bridging oxygen increased while the rate of no-bridging oxygen decreased, and the ratio of V4+/Vtotal also increased, too. This two changes led to the break of V=0 bond which is essential for the formation of V2O5 crystalline phase, thus inhibited the formation of that crystalline phase and improved glass crystallization stability.

With the demand of acquiring the high-accuracy blade surface by repeated grinding, a theoretical investigation is presented on the rapid measurement for the grinding process. The polygon approximation method is used in this paper which uses the corner points as the starting points compared with the traditional polygon approximation. The feature points are obtained iteratively from the starting points, which have the maximum curvatures in the corresponding region. In order to obtain the blade surface, this paper uses the chosen feature points as control points to construct the initial fitting B-spline surface and then modifies them to meet the the convergence conditions. According to the experimental results, the B-spline fitting surface errors have little difference from the errors obtained by the feature points. The fitting results are potentially useful for the calculating of machining allowance and decreasing the measurement time in the machining process.

In bimetallic clusters, the component and position of doping atoms can influence on structures and properties. It may induce irregular physical and chemical properties by tuning the doping atoms. In this study, (PdAg)309clusters with different contents and positions of doping Ag atoms have been investigated by molecular dynamics simulation based on the embedded atom method. It is found that the structure of (PdAg)309clusters transformed from truncated octahedron to icosahedron, and melting in heating processes from 200 K to 1500 K. Results indicated that the temperature of structural transformation and melting are strongly related to the number and position of doping Ag atoms. The melting point decreased with the increased Ag atoms, but there is irregular by doping Ag atoms at different position. The structural transformed temperature from truncated octahedron to icosahedron decreased with the increasing Ag atoms and the outer doping position. This means that the effect of doping Ag atoms can be used to tune the special structures of bimetallic clusters.

The sparsity rating data is one of the main challenges of recommendation system. For this problem, we presented a collaborative filtering recommendation algorithm integrated into co-ratings impact factor. The method reduced the sparsity of rating matrix by filling the original rating matrix. It made the full use of rating information and took the impact on similarity of co-ratings between users into consideration when looking for the nearest neighbor so that the similarities were accurately computed. Experimental results showed that the proposed algorithm, to some extent, improved the recommendation accuracy.

CS used in MRI image reconstruction is a research hotspot recent year. For the problem that reconstruction rate slow in MRI image reconstruction based on CS .Type acceleration Bregman iterative regularization algorithm to solve the MRI imaging sparse model ,and use the accelerate gradient method and the Restring in processing . The simulation data express this algorithm effective enhance the reconstruction rate, It’s have positive meaning in MRI image reconstruction that have strict in time requirement.

The sptitching measuring method applied in large-aperture aspheric surface optical elements can expand the range of precision measuring instrument. And the key point is developing the technique for high precision measuring data processing. To deal with the problem of cumulative errors which existed in the process of multi-section stitching, datum-transformation method was proposed, according to the characteristic of stitching measurement. The stitching measuring experiments were carried out based on Talysurf PGI 1240 profilometer of Taylor Hobson Company to verify the purpose for eliminating cumulative errors. The results show that datum-transformation method is feasible with the characteristic such as fast speed, high precision, and good operability.

This paper mainly discusses laser receiver technology at atmospheric channel high-rate environmentThesis analyzes the influencing factors of atmospheric laser transmission channel, Discussed the composition of the laser receiving system to study the floating threshold signal detection method of the laser, Study interleaved RS code + code to achieve channel coding scheme, the final results of the tests are given under the channel environment is a high rate of atmospheric laser receiving system.

The wireless sensor network is widely used in the largely data measure. The research on the energy consumption is the key point in its practical application recently for the wireless sensor network has the problem of energy restrain. Considering the wireless sensor network applies in the information monitoring system on environmental has the inadequate of the limited energy of nodes and the irregular network energy consumption, this paper analyses the basic structure of the environmental sensor network, and proposes the service discovery mechanism based on the catalogue model. This system can reduces the systems energy consumption, and is able to achieve the purpose of increasing the reliability and security of the sensor network, reducing the data redundancy degree and extending the lifetime of the network according to the experimental simulation.

The finite element analysis model was built as the real scale for mortar arch framework slope protection, and the displacement and strain at different points were collected by vertical loading pressure. So the mechanical mechanism can be studied, and the analysis was done between calculation results and testing results of solid miniature model. The studying results show that the point on the arch foot is the worst stress place for each arch, and the total displacement increase nonlinear as the distance from the slope top increases, and the bump phenomenon exists in the bottom of slope, the points are likely to be broken.

The creep properties and creep life estimation experiment was carried out on the P91 steel with low hardness (About 135HBHLD),and the creep life of P91 pipe was estimated.The result was that the ability for anti-plastic fracture, cracking and crack propagation of resistance to damage of high pressure steam conduit pipe with low hardness (About 135HBHLD) is very poor at 566°C and that the working life of low hardness zones (About 135HBHLD) from the creep crack propagation tests is about 5914 hours at 540°C.

High quality cuprous oxide thin films with large grain size were grown by thermal oxidation of copper foil in water vapor with N2 gas. It was found that in water vapor (111) oriented Cu2O is preferentially formed, whereas mixtures of random oriented CuO and Cu2O are formed when oxidized in air. The effects of the film oxidation method and heating temperature are investigated. In addition, the optical band gaps of cuprous oxide thin films have been determined by measuring the transmittance and reflectance spectra.

In order to study the structure and shape of the three different cross-sectional shapes of the mechanical properties of the teeth, for the cutter during cutting is immediately effective in the external load and characteristics, the use of LS-DYNA established three different shapes of the flexible structure of the cross-sectional tooth physical model, based on kinetic theory building displays constitutive model based IEF coal wall model. Through the next three shapes cutter cutting process simulation, the cut-off stress at the tooth tip curve and its statistical value, different coals under the stress of each cutting tooth size changes and trends; findings for the study of cross-sectional strength of the shape of its teeth, improving coal cut rate, and improve cutter life work provides an important basis. Auger shearer is the selection, design, personalization adapt and use to provide a new means and methods.

Video surveillance plays an important role in the industry. The emergence of mobile video surveillance further expands the scope of its application. However, video surveillance suffers many problems such as poor picture quality and long latency due to the network bandwidth and limited device processing capacity. So the application of video surveillance especially through wireless inernert and mobile networks transmission faces many challenges. Quality of Service (QOS) is ability of network supping different traffic with different level of service assurance, A kind of model of QOS -- differentiated service (diffserv) is proposed and applied in video surveillance system, and solves the problem above effectively.

To the problem of multiple dry-reed relays electromagnetic interference in application circuits, we present an effective method to reduce the electromagnetic interference in this paper. The method is alternating permutation matrix of dry-reed relays. The paper describes the cause of electromagnetic interference of dry-reed relays. Using the offset of electric polarity alternation principle, we put forward the method for reducing electromagnetic interference. The method is applied to a multi-functional physiotherapy instrument. By experiments, experimental result shows that the degree of electromagnetic interference is reduced along with the increase in the number of dry-reed relays.

The microscopic structure Cu46Zr46Al8 alloys were investigated by means of molecular dynamics simulations. This work gives the structure properties including partial pair-correlation function, pair analysis technique and Voronoi indices, and the temperature dependence. The simulated pair-correlation function is consistent well with the experimental one. We found that the the fractions of icosahedra and the distorted icosahedra increase with the decreasing temperature and become into the dominant clusters in the bulk metallic glass. At the meanwhile, we found that the icosahedra and the distorted icosahedra around Cu, Zr and Al are different. The Cu-center and Al-center icosahedra and the distorted icosahedra increase with the decreasing temperature, but The Zr-center icosahedra and the distorted icosahedra decrease with the decreasing temperature.

To the disadvantages, such as high energy consumption and the energy consumption imbalance, we proposed an energy-efficient routing protocol on mobile sink (MSEERP) in this paper. In the MSEERP, the network is divided into several square virtual grids based on GAF, each grid is called a cluster, and the cluster head election method of GAF is improved. In addition, the MSEERP introduces a mobile sink in the network, the sink radios in limited number of hops and uses control moving strategy, namely the sink does not collect the information until it moves to a cluster with highest residual energy. We applied NS2 to evaluate its performance and analyze the simulation results by the energy model. Simulation results show that the MSEERP balances the energy consumption of the network, saves nodes energy and extends the network lifetime.

This article studied the wire rope net bottom connection system by an experiment which was researching on four class and seven different kinds materials. Then we get the experiment results by using different anchoring materials as anchoring end and studying the wire rope bottom connection system of tensile bearing capacity. Through the experiment and data analysis, we can draw conclusions that: Application in general situations, we can use M8 stereotypes retractor, but need to expand the curvature of the top ring, while using smooth design scheme to reduce stress concentration. Used in critical situations, we had better use special M14 bolt anchor, which has a higher bearing capacity and security. The presented methods in this paper are feasible and practical.

This paper introduces a parametric modeling method of wave spring. The common wave spring parametric design programs are written with VBA in the SolidWorks platform by calling the relevant API (application program interface) functions according to the spring entity structure characteristics and service conditions, which obviously reduces the designers repetitive operations in the modeling process and shortens the spring design cycle.

At present, it is mostly the wheel or caterpillar of large mechanical equipment to finish the transportation operation in the mountainous area and forest complex environment. These large machines have some shortcomings, such as power consumption, poor mobility, low working efficiency and their own shortcoming of balance and the barrier and grade ability. In order to solve the above problems, this paper designed a new type of walking climbing robot and built virtual prototype of the robot by using PRO/E, did simulation of the robot motion process and the simulation results verified the feasibility of the design.

Study of LMS control method on active engine mount is carried out for ride quality improvement. Take an active engine mount which is based and developed from a hydraulic mount with decoupled disc-membrane as a module, the characteristic of vibration isolation of active engine mount is simulated and analyzed. The results indicated that active engine mount could reduce the vertical vibration effectively with LMS Control method.

Based on analyzing the vibration isolating characteristic and existence problems of the traditional ER-Fluid mount, this paper designed a new ER-Fluid mount with ring orifice and then built its mechanics and mathematical model. Carried on the simulation computation to it by Matlab/Simulink and studied the vibration isolating characteristic of ER-Fluid mount in changing design parameter of the ring orifice, finally provide a theory basis for optimizing structures of ER-Fluid mount in future.

The Split Hopkinson Pressure Bar (SHPB) is used to investigate the dynamic compressive mechanical behavior of a new foamed ceramic composite under impact loading. The stress versus strain curves are obtained under high strain rates. The test results are considered to be able to assure conformability of the tests, validate the stress equilibrium assumption, and show that the stress versus strain curves of foamed ceramic composite display strain hardening effect and damage softening effect as brittle materials. Meanwhile the curve includes short plateau region while no densification region.

Previous research on thick pastes such as coal slime was using two-cylinder piston pump as power equipment.Since the pressure fluctuation was big,flow measurement was not that accurate. In order to solve the problem, this paper will presents a feasibility study on conveying coal slime by single-screw pump. We used a single-screw pump as power equipment which conveying the coal slime with mass concentration of 64.5%-67.5% . Furthermore, we measured flow rate by self-developed flow meter and completed four groups of test. Through the data such as pressure, flow characteristic obtained from the tests, we have summed up the maximum mass concentration,pressure and flow rate.The results demonstrate the feasibility of conveying coal slime by single-screw pump.The original experimental data and the processing results conform to the theory of law.This paper provides the useful reference for the application of single-screw pump in the field of coal slime pumping.

In recent years, under the background of global energy crisis and the deterioration of the ecological environment, more and more attention has been paid to the earthen buildings for its outstanding ecological and regional performance. Through three cases, this paper discusses the application status of earthen materials in Chinese contemporary architecture. With the accumulation on the experience of technology and construction of the earthen materials, it will surely have a more diverse performance in the future.

The structural transitions of Ag965clusters during two different quenching processes (Q1:1.0×1014K/s, Q2: 1.0×1012K/s) were studied using molecular dynamics simulations. This work gives the structure properties including the variations with temperature of pair-correlation function, bond-angle distribution function, bond pairs and bond orientational order parameters in both rapid quenching processes. Our results indicated that the liquid Ag965 was frozen into amorphous structure at 100 K under the quenching condition Q1. While the liquid Ag965transformed to hexagonal close-packed (hcp) phase at the temperature 100 K under the quenching condition Q2.These instructions give you basic guidelines for preparing papers for conference proceedings.

In this experiment, the oxidative damage of nano-CdSeS in mice brains was performed. 20 male Kunming mice were divided into 4 groups and 3 experimental groups were exposed to different doses of nano-CdSeS (0.1 mg/mL, 0.2 mg/mL and 0.4 mg/mL) by intravenous administration while the control used saline solution instead. Three days later, the enzymatic activity of superoxide dismutase (SOD), the content of malondialdehyde (MDA) and the damage degree of DNA were determined to assess the oxidative damage in brain tissues. Our results showed that in the experimental groups, SOD activity was inhibited and MDA content was increased as the doses rising, at the same time, tail moment and tail DNA% increased significantly when comparing with the control. And these results exhibited a certain doses-dependency relations. From results above, it demonstrated that oxidative damage of brain induced by nano-CdSeS which enter into blood–brain barrier in mice.

At present, Hei47 block has already entered high water cut period, and it exists many problems, such as imbalance producing reserves, serious water flooded in main small layer, imperfect injection-production well spacing and so on. Aiming at these problems, this paper analyzed from two aspects of the potential: the first is the potentiality of well pattern thickening which would analyze the reasons of the remaining oil enrichment through four different imperfect patterns, the paper proposes different schemes. For example, this study design new wells in the injection-production incongruous area; As for the area without the control of well net, for example, the study design a horizontal well near the fault where concentrated much remaining oil, and the production conditions are good; The second is making some modification measures in high water cut layer, and perforating other potential small layers, in the light of the wells in low location and is high water cut can be considered to transfer to injection wells. Structural reservoir high-yielding well mainly concentrated in the structural high place, flooded well in the low position, this area is suitable for edge water injection.

In order to study the toxicity mechanism of plant VOCs of four kinds of terpene monomers(α-terpineol,α-pinene,β-pinene,1,8-cineole), the activities of acetylcholinesterase in Zophobas morio larvae were treaded with spectrophotometer at different time (12h, 24h, 36h, 48h). The results showed that four kinds of terpene monomers (α-terpineol, β-pinene, α-pinene, 1,8-cineole) had high biological activity in Zophobas morio, which can inhibit the activity of acetylcholinesterase(AchE) effectively．

The current calibration methods of combat aircraft’s attarck angle sensors are too complex and have some insufficiencies. According to the detailed design requirements of flight control system，a method combined with linear fitting and neural network identification is proposed, which can calibrate the measure data of the attarck angle sensors qucikly and accurately. The method proposed avoids the disadvantages of traditional interplation method， improves the computating efficiency, and ensures the the flight control system’s fault-tolerant ability. A simulation on flight control system with this calibration method was carrid out, which validated the precision and dependability of the method. The method can also deal strong nonlinear data quickly.

Use electromagnetic simulation software PSCAD/EMTDC to 6 kV power distribution lines for lightning protection research. Resarch the influence of the different measures for the lightning protection level. Finally get a comprehensive lightning protection program.

Daqing city is a city which was constructed on wetlands, wetland water environment plays an important role in the ecological health and environmental safety of the whole Daqing city. Therefore, comprehensive pollution index and single factor pollution index were employed to investigate the spatial-temporal variation of the water quality in this paper. The order of the comprehensive pollution index in the year was as follows: summer (16.19)> autumn(14.19) > spring(13.11). The comprehensive pollution index of TN was the highest among the five parameters, reaching14.05, while the comprehensive pollution index of BOD5 was the lowest, with an average of 4.5. In spatial terms, the order of pollution was as follows: prime areas> middle areas>terminal areas. This showed wetland better purification of water quality.

Mesoporous silica aerogels with a high surface area and narrow pore size distribution were prepared from tetraethylorthosilicate (TEOS) precursor at ambient pressure by using a water miscible ionic liquid (IL) [Hmim]Br as a template. The aerogels were characterized by scanning electron microscopy (SEM) and N2 gas adsorption-desorption isotherms (BET and BJH analyses), and the effect of the IL on gel structure was also studied. The results showed that IL plays an important role in regulating the nanostructure of the aerogels, in particular, pore sizes and their distribution. By increasing the IL/Si molar ratio from 4 to 7, the specific surface area of the resultant aerogel increased from 822.38 to 992.43 m2/g, while the pore volume decreased from 1.568 to 1.031 cm3/g. More importantly, the pore size distribution became narrower with minimum average pore radius centralized at 20 nm as the IL/Si molar ratio of 7. Compared with other IL templating methods previously reported, notable attributes of this method include gelation at a much wider range of the IL/Si molar ratios (up to 7) and the formation of homogeneous porous structure whose size can be up to meso-scale (2 nm - 50 nm).

This paper proposed a navigation algorithm based on indirect extended kalman filter. The algorithm adopted state error model based on sensor random walk and chose low frequency value of acceleration and angular velocity as observation. The extended kalman filter was used to calculate the optimal estimation of state error which can be used to correct the predicted value of state. IMU7200 and encoder provide acceleration, angular velocity and velocity for drill bit. Marine experiments in the East China Sea show that the proposed algorithm can successfully implement with an accurate and reliable performance.

To study the similarity scaling of structure for compressor disc, based on the basic rules of similarity scaling, physical speed of five linear scale factors (LSF) is determined, and the ratio of between centrifugal force and LSF is established, then the centrifugal force of single rotor blade and single rim flange with different LSF is obtained. Using the method of finite element numerical simulation, strength of four assessment projects including circumferential stress of disc heart, circumferential stress of cylindrical surface, radial stress of cylindrical surface and circumferential stress of meridian plane is analyzed. The results show that the maximum relative error among four assessment projects is only 2.60%, and stress level of disc corresponding to the different LSF is very close to each other. Then a conclusion can be got that the stress level of disc is little difference with itself geometry size, and the structure of disc can be designed pro rata scaling.

Density functional theory (DFT) calculations were performed to investigate the structures of bromo silsesquioxanes Si2nO3nBr2n (n=1-5). Our study focuses on the structures, stabilities, and electronic properties of the bromo silsesquioxanes. The large HOMO–LUMO gaps, which range from 4.43 to 6.62 eV, imply optimal electronic structures for these molecules.

A novel positive-displacement multiphase pump named synchronal rotary multiphase pump (SRMP) was introduced. The two-phase leakage flows through the various leakage clearances in the SRMP were theoretically analyzed and formulated. Calculations on the leakage loss of a SRMP prototype were performed. The results show that the leakage loss is mainly produced by the leakage through the radical clearance between the rotor and cylinder. The SRMP presents a lower volumetric efficiency at a higher pressure difference. The leakage loss increases rapidly with the increase of the gas volume fraction of the two-phase working fluids.

This paper addresses stability properties of linear switched positive systems composed of continuous-time subsystems and discrete-time subsystems. Based on the common linear copositive Lyapunov functions, stability of the positive systems is discussed under arbitrary switching. Moreover, a sufficient condition on the minimum dwell time that guarantees the stability of linear switched positive systems. The dwell time analysis interprets the stability of linear switched positive systems through the distance between the eigenvector sets. Thus, an explicit relation in view of stability is obtained between the family of the involved subsystems and the set of admissible switching signals.

Calcium carbide waste paste is highly concentrated and viscous, rich in calcium, and has a great comprehensive utilization potential. Comprehensive utilization process based on high-pressure pipeline transportation is the best choice for use of calcium carbide waste. But the theory of pipeline transportation of the paste has rarely been reported. Industrial-scale transportation experiments with diameter of 75mm, 100mm, and 125mm were conducted, respectively. The results show that the pipe pressure is linearly distributed along the pipeline, but it is piecewise linear. The pipe pressure in the front end drops faster than that in the back end of the pipeline. The pipe pressure is proportional to the flow rate of calcium carbide paste. The delivery resistance increases greatly as the pipe diameter decreases at the same flow rate.

The main objective of this study is to investigate the feasibility of treatment of livestock waste water with biogas slurry by the constructed wetland and provide the operation parameters for a full scale constructed wetland to improve the quality of waste water. The results showed that when the influent flux was 1.5m3/d, the average removal rates of Turbidity, COD, TN, NH4+-N and TP in the horizontal subsurface flow constructed wetland system were 89.57%, 59.21%, 55.09% 55.57% and 53.80% respectively. The wetland system has high treatment effect and run stably in the pretreatment process of livestock waste water with biogas slurry.