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The paper studied the effect of n-LaB4O7additives of different contents on tribological behaviors of the ion nitrocarburized layer at higher temperature. It is found that 7% n-LaB4O7additives can improve obviously the tribological performances of the ion nitrocarburized layer. This because that synergetic effect of friction reduction and wear resistance is produced between the n-LaB4O7additives and ion nitrocarburized layer under higher temperature, load and frequence, and the solid lubrication films including oxide, nitride and sulphate and so on are formed on the friction surface to separate the contact between the metal sufaces, and furthermore the n-LaB4O7particles on the friction surface play the "Micron nanobearing" function, which make the ion nitrocarburized layer have the more excellent tribological performances.

Catalyst precursor was prepared with the Fe-Al hydrotalcite as the support, Ce-doped TiO2 as the active component. Then SO42-/CeO2-TiO2/HTLC photocatalyst was obtained by SO42- -modification with soak method. Catalysts were characterized by means of XRD, SEM-EDS and UV-Vis DRS. With methyl orange as model pollutant, the photocatalytic performance of the catalysts was determined. Experimental results showed that the absorption intensity for visible light of the CeO2-TiO2 particle was stronger than that of TiO2 particle; moreover there was a synergistic effect between SO42- and CeO2-TiO2/HTLC, thus the absorption intensity for visible light of SO42-/CeO2-TiO2/HTLC photocatalyst was enhanced further. The decolorization rate for methyl orange of modified SO42-/15%(CeO2-TiO2)/HTLC photocatalyst reached 93% after irradiation under simulated sunlight for 2 hours.

Tensile test of low carbon steel was carried out on a universal electronic testing machine. Loading and strain test data of low carbon steel was acquired by means of the tensile test. Based on the measured tensile specimen data, elastic modulus of low carbon steel was calculated. It was found that elastic modulus of low carbon steel varied during tensile process. The damage of low carbon steel under tensile was identified by the calculation of elastic modulus.

Ni-ZrO2-CeO2 nanocomposite coating was prepared by pulse electrodeposition. The effect of addition of ZrO2 and CeO2 nanoparticles, average current density, duty cycle and pulse current on microhardness of Ni-ZrO2-CeO2 nanocomposites were studied. The results show that microhardness of nanocomposite is increased at first and then decreased with the increasing additive amounts of two kinds of nanoparticles. With increasing reverse the average current density, the microhardness of the composite coating increases. Also, the microhardness of nanocomposite fall with the increasing of pulse frequency. With the positive duty ratio increasing, the microhardness of the composite coating increase at first and then decreased, but with the increasing of the reverse duty ratio, the microhardness of nanocomposite coating is gradually decreased.

The paper studied the friction and wear performances of n-Na2B4O7/ion nitrocarburized duplex layer at different frequences. It is found that at frequence 10 Hz, 20 Hz, 30 Hz, respectively, the friction factor and volume loss of the duplex layer is 64%, 60%, 50% and 97%, 91%, 95% less than that of the intermediate frequency quenched surface, respectively, which indicates that the n-Na2B4O7/ion nitrocarburized duplex layer has more excellent friction reduction and wear resistance performances than the intermediate frequency quenched surface under CD15W-40 oil lubricating at different frequences. This because that the chemical reaction films including oxide, BN and so on formed on the friction surface play the solid lubrication function, and the n-Na2B4O7 particles on the friction surface play the "Micron nanobearing" function.

HACCP system is one of the world's most popular food safety quality control system. To avoid food poisoning and other food-borne diseases, we must analyse and judge factors causing foodcontamination in the food supply chain, determine the supply chain CCP (critical control points), thereby establish limits and monitoring system for each CCP, correct errors based on the monitoring results, finally, audit system and make operational records. According to China's actual situation and the domestic and international standards, take the production and processing of pork as an example, I analysed the processes and critical control points in the supply chain of pork breeding, slaughtering, transportation and sales.

Flame atomic absorption spectrometry (FAAS) can determinate the contention of Zn2+ in water samples rapidly. Choosing 2 - (5 - bromo-2-pyridylazo) -5 - diethylaminophenol (5-Br-PADAP) as a precipitating agent, Mn2 + as the carrier ion to separate and enrich Zn2+ in water samples. And studies show that the selected system is affected by acidity, the amount of precipitant concentration, carrier usage and aging time factors. The detection limit is 0.117μg/L.Keywords 5-Br-PADAP、Mn2+、FAAS、Separation and enrichment、Zn2+

Microcrystalline Si films were deposited by electron cyclotron resonance plasma-enhanced chemical vapor deposition (ECR-PECVD) using Ar diluted SiH4gaseous mixture. The effects of the substrate on deposition rate, preferred orientation and roughness of the films were investigated. The results show that, the influence of the substrate surface chemical nature on the deposition rate is significant in the initial stage of the growth. And considering the crystallinity and roughness of the films, the substrate is favored in its preferred orientation with a rougher surface. Based on these results, it is confirmed that the combination of diffusion and etching is indispensable to describe the deposition of μc-Si with SiH4diluted by Ar, and the mechanism of μc-Si growth could be controlled by diffusion of Si and etching of the Ar+on the film surface.

[Objective]This paper aims to make a bioinformatics analysis on the subcellular localization and functional site of CagM protein in helicobacter pylori cag pathogenicity island and further explore the functions of CagM protein. [Methods]Apply SubLoc v1.0 program to make the subcellular localization of this protein, and use TargetP program and PSORTb version 2.0.4 to make the verification and analysis; use ANTHEPROT 5.0, Gene3D Scan Sequence software and InterPro Scan software to analyze the functional site of CagM protein, and use DOG1.0 software for the drawing. [Results]CagM is a kind of secretory protein located in the periplasmic space rather than a membrane protein; CagM has many functional sites such as N-glycosylation site, protein kinase C phosphorylation site, tyrosine kinase phosphorylation site, and myristoylation acting site as well as many PDZ III binding sites. [Conclusion]As a kind of secretory protein located in the periplasmic space, CagM protein will become the substrate of many kinds of kinases after the translation and a series of modification, and after it is activated, it will participate in the signal transmission function and the assembly of IV type secretion system, which may play a role in the collection and assembly process of other proteins.

Realistic prediction of concrete creep is of crucial importance for the safety, durability and long term serviceability of concrete structures. High performance concrete (HPC) contains combinations of various components, such as aggregate, cement, water-reducing agent and other ingredients which affect the properties of the HPC including creep. This paper reviews the accuracy of the conventional concrete (CC) creep prediction models, including B3,GL2000 and CEB-FIP(2010). Further, a new creep prediction model based on the comprehensive analysis is proposed. The improved model was calibrated through a joint optimization of laboratory creep tests. Comparisons of the results of the proposed methold with 76 data points of creep coefficient showes good agreement.

The masonry building takes a majority of town housings in these areas. Unlike the experimental study, the Finite Element Analysis is an important part for better comprehension of the finite element method and can reduce the investment and manpower. The aim of this paper is to simulate the structural response from the variety of masonry buildings under earthquake excitations by using finite element software called ABAQUS. There are four models of the masonry building with different storey, which include the one without constructional column and ring beam, with constructional column only, with ring beam only and with constructional column and ring beam simultaneously. In the process of modeling, we adopt the integrated model and regard walls, constructional columns, slabs and steels as homogenous continuums. Furthermore, we adopt concrete damaged plasticity material model to simulate the material of building and input El Centro earthquake wave N-S component. The result of analysis shows that setting ring beams or constructional columns can significantly improve the integrity of the building and reduce the mises stress on foundation. The result of analysis has a significant guidance on masonry building construction in seismic region.

An in depth state-of-art review is done on the topic,constitutive relations of masonry under compression. 12 constitutive models of masonry proposed by scholars from home and abroad are presented in the paper. These models can be classified into four types. Merits and drawbacks of each constitutive relation are discussed. Ten typical constitutive relations are selected to make comparisons. Results show that the ascending branch of curves has few differences, major differences occur in the descending branch of curves. Besides, two experimental data are used to analyze the models and results are discussed. Furthermore, some suggestions on this topic in future research are presented.

In order to improve dynamic and static performance of the precision horizontal machining center, the method of multi-objective optimization based on the response surface model was applied for optimizing design of the bed structure. The design variables were the layout parameters of the rib plates. Sample points were obtained by the Box-Behnken design experiment, and responses of sample points were analyzed by SAMCEF. The maximum deformation of guide rails and the low-order natural frequency were extracted to fit the response surface model by least square method. The layout parameters of the rib plates were optimized through the application of multi-objective genetic algorithms. Then, relationship between the lightening holes and the performance were analyzed to determine the suitable diameter. The results verify the validity of the optimization method, and the paper provides methodological guidance for optimization of machine tool structural parts.

In this paper, a two-dimensional non-steady-state heat transfer model has been established for the working conditions of thick slab in a steel plant in China, a modification has been made on the basis of the nailing experimental results, the slab solidification difference of practice and prediction by field heat tracing model has been analyzed. The results show that the actual solidification end point of slab is more close to meniscus than prediction, the distance difference is 0.592m, the better soft reduction zone is from 0.2 to 0.9, which the level of central segregation can be reduced from the class B 1.0 to C 1.0.

when explosive blasts in the rock, the stress wave of impact produced appears all kinds of phenomena, such as reflection, refraction, and transmission in the process of transmission on the joint surface because of discontinuity, heterogeneity and anisotropy of rock mass of weak plane in physics, which lead to extremely complex on rock blasting process. Through conducting on high dynamic strain test of blasting process on joint rock mass model, it researches dynamic load characteristics of joint rock mass and joint-planes effect on extension of critical raw crack and attenuation law of stress wave, analyzes the strain waveform of strain gages which locate in the different direction between initial crack of blasting and joint, and figures out the impact of joint plane on the stress wave transmission, which provide an important theoretical basis on the relevant parameters design in the process of blasting engineering of joint mass existing in actual.

The east wing of the third new mine of Fengfeng Group co., LTD has been designed to construct about 2490m with a long service time, bad geological conditions and slowly driving speed. Through improving rock drivage construction techniques, the mine has taken measures of driving by three teams, a scientific construction organization of digging while spraying and a kind of advancing crossover operation method of after four in the first four. In addition, the mine also strengthens the management and takes scientific and reasonable scoring model and acceptance criteria. Through all these measures the mine has improved the driving speed effectively and make on the single lane rock drivage footage of more than 120 m good grades. The effect of roadway supporting and forming is of good quality and it has never had safety accidents. Whats more, the economic benefits and social benefits are obvious. It provides an important reference significance for similar quick rock drivage project.

An experimental study was conducted to determine cutting parameters of high-speed milling of Ti-17 according to their effects on residual stresses. First, three groups of single factor experiments were carried out to reveal the effects of cutting parameters on residual stresses. Then sensitivity models were established to evaluate the influence degrees of cutting parameters on residual stresses. After that, three criteria were proposed to determine cutting parameters from experimental parameter ranges. In the experiments, the cutting parameter ranges are recommended as [371.8, 406.8] m/min, [0.363, 0.412] mm and [0, 0.018] mm/z for cutting speed, cutting depth and feed per tooth, respectively.

The luminescence of rare earth composite micelles was measured in different polarity. The polarity of complexes was changed with the molar ratios of block copolymers, trivalent europium (Eu (III)) ions and 1,10-phenanthroline (Phen). When 4-vinyl pyridine (4VP) coordinated with central ions Eu (III), the improved asymmetry of composite micelles resulted in higher polarity. The higher polarity strengthened the ability of electron transition, which improved the luminescence of complexes. When Phen participated in coordination, the polarity was improved further. The strongest luminescence of complexes could be obtained by changing the molar ratios of block copolymers, Eu (III) ions and Phen.

Shipborne measurement and communication equipments are central parts of space measurement ship. Renewal of the equipments is very important for space measurement tasks. Also it is important to save cost for continual development. The paper proposes the problem of technical and economic analysis of the renewals. The maintenance and update with their analysis are introduced too. Finally schemes of the renewal and its decision-making method are presented. The renewals are motivated mostly by requirement of space missions at present. But for continual development the ratio of efficient and cost is important. The decision-maker may refer the paper and select scientific renewal scheme.

In recent years, over 75% civil aviation accidents are caused by pilots manipulation mistake or cognitive error, but there is still no quantitative method to research pilots error. With the statistics and analysis of NTSB (National Transportation Safety Board) aviation database, the aviation case base ontology model has been established in the paper, which was the closest airworthiness directive to classify the aviation accidents according to the classification of aviation system. The pilots error in the aviation accident and the factors possibly causing the pilots error were analyzed based on Reason model to propose the inducing factors for pilots error. With the human factor analytical method, the behavior factors inducing the pilots error obtained from the pilot himself included excessive manipulation number, external environment interference, insufficient experience, physiological and psychological conditions, insufficient time margin. Pilots behavior shaping factors can guide the rational design of manipulation procedure and pilot training, thus enhancing the flight safety.

As a pre-treatment process for producing solar-grade silicon, hydrometallurgical method could remove the most of metallic impurities of metallurgical-grade silicon, which is a hopeful technology to provide solar energy material independence of the Siemens skill. Factors such as the hydrochloric mass fraction, temperature, reaction time, and particle size of silicon powders were investigated in the impurities removal experiments under the condition of mechanical stirring. The leached samples were analyzed by ICP and SEM. The optimum parameters, hydrochloric mass fraction 5%, temperature 80°C, reaction time 9h, particle size 75μm, were determined by single factor experiments and orthogonal experiments. The 86.1% of Fe, 68.1% of Al, 85.9% of Ca and 25.9% of B impurity was removed from metallurgical-grade silicon powder.

Artificial ground freezing is a time-varying dynamic and complex process. Traits of the frozen soil wall are influenced by the refrigeration system operating conditions, geological conditions, boundary cooling, construction conditions and many other factors. Nature of the frozen soil and the structural state of the frozen soil wall is a function of temperature, yet the temperature field of the frozen soil wall is changing with time. Further, it has a bad influence on the buildings nearby when Frost-heaving and Thawing-settlement happened during freezing process. it will be necessary to comprehend their real-time settlement and deformation as well as to keep sure the frozen soil wall and the buildings nearby are on regular service. The Lindong mine wellbore is located in the Cretaceous Stratum. A information technology of freezing construction method is used to ensure the safe and efficient construction of the wellbore. It made a great contribution to the lingdong mine yielding and other similar projects.

With the increase of outlet pressure to compressor, all cycle COP is a reducing trend except R744, in addition, R744 compression cycle has an optimum high pressure. When the inlet temperatures of compressor gradually increase, the performances of all cycles basically unchanged, but the R744 compression cycle has an increasing trend. With the increasing of outlet temperature to the condenser, the performances of all cycles are decreased; instead with increasing of the evaporating temperature, all cycle COP is an increasing trend.

In range of high pressure, the performance of single stage cycle with an expander (SCE) is better than the cycle with a throttling valve (SCV). With increasing of the evaporating temperature or decreasing outlet temperature of condenser, the performance of the two cycles is an increasing trend. With increasing of pressure ratio, the performances of all cycles are decreased. Under the same comparison conditions, expander cycle performance superior to the throttle valve performance.

With increasing of high pressure, the two stage compression cycle with two gas cooler has a downward trend. With increasing of the evaporating temperature, the two stage compression cycle with two gas cooler has an increasing trend. With increasing of outlet temperature of condenser; the two stage compression cycle with two gas cooler has a downward trend. With increasing of intermediate pressure, the performances of the two stage compression cycle with two gas cooler are decreased.

In range of high pressure, the performance of single stage cycle with an expander (SCE) is better than the cycle with a throttling valve (SCV). With increasing of the evaporating temperature or decreasing outlet temperature of condenser, the performance of the two cycles is an increasing trend. With increasing of pressure ratio, the performances of all cycles are decreased. Under the same comparison conditions, expander cycle performance superior to the throttle valve performance.

With increasing of high pressure, the performances of all kinds refrigerants except for R744 are all declined and transcritical R744 compression cycle has an optimum high pressure. With increasing of the evaporating temperature, all cycle COP is an increasing trend, with increasing of outlet temperature of condenser, the performances of all cycles are decreased. Under the same comparison conditions, the performance of R134a refrigerant cycle is superior to the cycles of other refrigerants, and the cycle of R11 refrigerant has the worst performance.

According to the special working environment of TT&C ships, S/X/Ka frequency TT&C system needs to be developed by using beam waveguide antenna technology in order to ensure Goddess of the moon project. Antenna structure design is one of the key technologies in the TT&C system. This paper designs the antenna structure detailedly, in which features and design parameters of antenna reflector, antenna seat, shaft angle detection and safety protection devices are given. The load of antenna structure is simulated and calculated based on ANSYS and results show that the designed antenna structure is reasonable, antenna parameters and components configuration are correct, all that fully meets the requirement.

In order to realize the real-time environmental monitoring for shipboard TT&C antenna-centrosome, this paper designs a monitoring system based on Modbus by analyzing current conditions, which contains sensor data acquisition terminal and video switcher. The designed system has many advantages, such as less project-related work, higher cost performance, convenient installation, easy debugging and etc. Actual application shows that temperature & humidity data and video information gathered meet the requirement need completely. Techniques in this paper can be referenced in other related fields.

In this work, MoS2 microsphere was synthesized by hydrothermal reaction, in which thiourea (CS(NH2)2) was used as S-source and reducing agent, ammonium heptamolybdate ((NH4)6Mo7O24.4H2O) was used as Mo-source. The influence of temperature, as well as different dispersing agents, on the reaction product’s morphology, structure and phase composition was discussed. X-ray diffraction results show that all the as-synthesized products are the hexagonal 2H-MoS2 without impurity. SEM images of the as-prepared MoS2 samples without adding any dispersing agent present spherical morphology with sheet-like structures shaped on the surface. A possible formation mechanism of the MoS2 microsphere is that of self-assembly growth process; In addition, for the samples adding surfactant CTAB, SDBS or PVP in the reactants, the MoS2 is confined to layered structure. Compared with SDBS and PVP, CTAB has the best dispersion effect which ensure the as-synthesized microsphere with about 300nm average diameter, and the influence mechanism of which can be deduced as electrostatic interaction and stereo-hindrance effect.

Design and fabrication of a tactical motor nozzle flexible joint were accomplished in this paper. The miniature flexible joint configuration characteristics were analyzed. The silicone rubber was selected as the elastomer ring material based on the mechanical properties test. Individual reinforcement and elastomer rings were assembled to form the flexible joint by transfer molding. Test results indicate that the flexible joint meet the performance requirements.

Samples of Al2O3-C materials were prepared, based on the tabular corundum and recycled materials as raw materials, natural graphite as carbon source, Si as antioxidant and phenolic resin as binder. The physical properties were determined and the microstructure evolution in the samples were analyzed by scanning electron microscopy. The results shows that, Firstly the apparent porosity rate change little and the body density decreases much with the amount of recycled materials increasing. Secondly the room temperature strength and the high temperature strength decreases when the amount of recycled materials increases. Especially the strength of sample decreases rapidly when the amount of recycled materials is over 15(wt)%. In addition, the grain of recycled materials are wrapped up in the face by a powder layer. The body density and the strength of samples decrease because of the apparent porosity.

In the present study, pyrolysis characteristics of corn straw pellet were studied in biomass pyrolysis test bench. The influence of pellet diameter on pyrolysis products was investigated. The results showed that: with the increase of pellet diameter, the yield of tar decreased ,and the yield of char and gas increased, and char density increased too. The results has significant theoretical guidance on the biomass gasification and preparation of char using biomass pellets.

The wheel load transfer across a joints in concrete pavement is accomplished mainly by dowel bar system, dowels are installed in order to allow shear load transfer across slab joints. The dowel group action has been examined in this paper via from using of 3-D FE mode. Numerical model results are presented in four formats in this study, including shear force diagram, load transfer ratio by shear force, dowel shear force distribution and dowel shear ratio. The relationships between applied wheel load and dowel group action will be useful in the design and evaluation of dowel jointed concrete pavements.

For calibrating the X-band equipment in the TT&C ship based on wireless communication, we design a high gain rectangular horn antenna. Through analysing the theory of structure, the antenna’s preliminary size parameter is estimated and it is simulated based on HFSS. The antenna structure parameters are obtained after parameters optimization. The results of simulation indicate that the design of antenna indexes meet the needs completely. The structure of antenna is compact and it easy to process. The simulation method in the paper may also be referred to other related design.

Azimuth-sign is a benchmark facility for the TT&C ship’s equipment during the dock calibration. Because the current way of measuring is tedious, the azimuth-sign does not suit for the changing environment. To ensure the accuracy of the measurement, we must increase efficiency and improve automation calibration level. The paper introduces a system of wireless autonomous positioning system. Through analyzing the principle, we give the design scheme of the system. The paper introduces briefly the hardware and software of the system. The test of the system shows that the design is reasonable and the precision of positioning meets the requirement.

The Axial Magnetic Field (AMF) applied to the arc vacuum column in the vacuum tube can make the vacuum arc keeping in diffusion state, provided that the short circuit current to be interrupt is within a critical value. In the results, the breaking ability of Vacuum Interrupters can be highly improved with the help of the AMF. The experimental study has proved that the AMF should be sufficient strong and have optimum distribution, in order to improve the breaking capacity of vacuum circuit breaker. This paper presents a novel axial magnetic contact with the concave axial magnetic field distribution and its 3-d simulation.

Radio beacon is required for dynamic self-test of vessel carrier's radio measuring and controlling equipment. Also it is required to process angle-adjusting of the equipment. The paper proposes a kind of method to design beacon based on quadrature frequency-conversion technology. The parameters of the beacon can been set flexibly through MCU control. Sidebands and local oscillator’s leakage are suppressed in circuit implementation. The beacon works reliable and its performance meets requirements. Real application shows fair result. The beacon supports technically naval adjustment of vessel carrier's radio measuring and controlling equipments.

The Ni-Nd2O3 nanocomposite coatings were prepared by electrodeposition under dual-frequency ultrasound(DU). The Nd2O3 content and surface morphology of Ni-Nd2O3 nanocomposite coatings were analyzed by scanning electron microscopy (SEM). The results showed that the Nd2O3 content of the nanocomposite coating prepared by electrodeposition using DU was high at 3.48% and the surface morphologies of DU nanocomposite coating showed better smooth surface, finer grain and more compact microstructure. A kind of method to prepare high quality Ni-Nd2O3 nanocomposite coating was obtained, which was: 40 g/L Nd2O3 nanoparticles, 45°C the temperature of electrolyte, 4A/dm2 cathode current density, 240W the power of bath-type ultrasound(BU), 100kHz the frequency of BU, 30W the power of probe-type ultrasound(PU), 20kHz the frequency of PU, and 1000r/min the stirring speed.

Taking double-row tapered roller bearings of a rail passenger coach as research object, the analysis on convexity for tapered roller bearings has been carried out. The comparison of contact stresses at different convexity values with the ANSYS has been done, the optimal range of convexity value under a certain load has been obtained. The results show that the reasonably design of convexity can avoid or reduce the border contact stress concentration occurred between rollers and inner, outer ring raceways under certain condition. But the approximate theoretic convexity and the results obtained by Finite element analysis have a certain margin of error.

This paper presents an application platform for meteorology observing heterogeneous wireless sensor networks (WSNs) and a data fusion weather platform. We propose system architecture for wireless sensor networks and mesh networks for handling and storing sensor data streams in real-time. It collects data from WSN and continuously transmits physical or metrology conditions at different locations to a remote central data server. A web based platform designed to enable remote online access to WSN data with interactive data retrieval and visualization functionalities.

The static adsorption of stainless steel pickling wastewater by ion resin exchange and activated carbon adsorption was studied respectively. The results shown that, the static saturate adsorption capacity of 001×7 dry resin for Cr3+and Fe3+ in the wastewater was 60.34mg/g and 65.3mg/g respectively, and the elution rate of saturated resin by using Na2SO4 and H2SO4 can reach 99%. The saturate adsorption capacity of activated carbon for Cr3+and Fe3+ in the wastewater was 4.55 mg/g and 40.76 mg/g respectively, and NaOH as desorption reagent had a good desorption effect to activated carbon. The regeneration of activated carbon was also carried out.

In this paper, Technology development of Semi-coke production with low metamorphic degree coal is introduced. The technology characters and the problems existed is analyzed and measures to these problems are suggested. Two pieces of techniques to the main problems, lower temperature distillition with oxygen as combustion agent (DWO2) and new semicoke dry quenching with cold distillation gas (NSQ) is introduced. They have been proven feasible by pilot test and can combine with the current process to form a new generation environment-friendly technology.

In this paper, nano-Fe3O4 as sorbent was used to remove Congo red dye from aqueous solution, in order to investigate its adsorption properties. Fe3O4 nano-particles were synthesized by hydrothermal method, and were characterized by Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy (FT-IR) and X-ray Powder Diffraction (XRD) to examine their size, morphology and property. The adsorption and removal of Congo red dye from aqueous solution on nano-Fe3O4 was studied in batch equilibrium experiments. These results showed an excellent adsorption capability for Congo red with a maximum adsorption capacity of 1395mg•g-1 at 20°C and pH2.0. It indicates that Fe3O4 nano-particles can be effectively used to remove color from wastewater containing dyes.

The proposal of ARM-based online detecting system of storage battery was suggested for the need of precise control of the working voltage and temperature of base stations of China Mobile. In terms of hardware, ARM7-LPC2368 of NXP Semiconductor was chosen as the processor chip, and the online detecting system was constructed using three modules: information acquisition, kernel control and battery. As for software, our proposal adopted the top-down design philosophy and modularized designing method and also embedded uC/OS-II which significantly improved the utilization rate of CPU. At last, the system precisely met the requirements of the proposal by field tests at base station of China Mobile, thus, verified the feasibility of the proposal.

As users of the increasing demand for multimedia services, 3GPP long term evolution system proposed the Long Term Evolution, LTE. LTE is the most important improvements with a new air interface technology to provide users with higher peak rates. Accurate channel estimation is to ensure the transmission quality of LTE system and the key to its advantages. In pursuit of lower bit error rate (BER), this paper based on pilot signals TDD LTE system on the uplink channel estimation algorithm. Use LS algorithm, MMSE algorithm and svd algorithm. Based on these three improved svd algorithm, it gave the simulation results.

The paper is concerned with the effect of cutting parameters on surface microstructure of titanium alloy TC17 in high speed milling with the carbide cutting tools by single factor experiment. It will be provided experimental evidence for optimization cutting parameters and surface quality control of titanium alloy parts in high-speed cutting process. It is observing microstructure with Germany's Leica DMI 5000M inverted metallurgical microscope. The results show that in the range of experimental parameters, the effect of milling speed, feed per tooth and milling depth on surface microstructure in high-speed milling of titanium alloy TC17 is little. There is no obvious phase change, as indicating that most of the heat generated by chip away, little heat incoming workpiece, under the conditions of high speed milling titanium alloy TC17.

In order to provide experimental evidence for optimizing high-speed milling parameters and controlling surface integrity, the effects of cooling conditions, tool rake angle and milling parameters on machined surface residual stresses were investigated in high-speed milling titanium alloy TC11. The residual stresses were measured by XStress3000 X-ray stress analyzer, and three points were tested on each workpiece surface, then take average. The milling parameters were optimized based on fatigue performance. The results show that the emulsion cooling get the highest surface residual compressive stress and the dry cutting get the lowest residual compressive stress. With the increasing of cutting tool rake angle, surface residual compressive stresses increase. The most effect on the residual stresses of surface is milling width, next are feed per tooth and milling depth, and the last is milling speed. In the experimental range, the optimized high-speed milling parameters are: vc=377m/min, fz=0.03mm/z, ap=0.2mm, ae=7.5mm.

With the coming rush of population aging and the termination of the demographic dividend, the question on the extension of the legal retirement age is becoming a hot topic in the community. This paper analyzes factors affecting retirement age，such as demographic dividend, life expectancy, years of education per capita, supply and demand situation in labor market. From these factors, reasonable quantitative reference standards can be introduced.

This paper will introduce a brand-new deodorization technology, which is whole-process deodorization technology, and its application in Tianjin Jizhuangzi wastewater treatment plant.