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The development of materials for core components which can serve in high temperature corrosive environments for a long service time is crucial to realize high efficiency and high-burnup operation of advanced nuclear reactors. Alumina forming austenitic (AFA) alloy is a kind of promising materials with improved corrosion resistance as well as strength at elevated temperature. The progress on the composition design and characterization of AFA alloys are reviewed in this work for evaluation their potential applications in advanced nuclear reactors. AFA alloys without the addition of carbon have been fabricated. Microstructures were observed by SEM and TEM. Mechanical properties were measured at room temperature and high temperature.

The fabrication of porous diamond preforms is a key step for obtain diamond/metal copposites with high proporties by liquid infiltration. In order to prepare porous diamond preforms with high strength and excellent compatibility with liquid metal. The diamond metallization should be treated first usually.In this paper, the microstructure, composition, phase structure and bond strength of tungsten coating on diamond surface by using salt-bath method were observed and analyzed experimentally including scanning electron microscope (SEM), energy spectrometer analysis (EDS), X-ray diffraction (XRD). The results show that tungsten start to react with carbon atoms on the surface of diamond at 1100°C while a dense and completely covered coating can be obtained at the temperature of 1150°C with 10-120 minutes dwell time. With this process, the layer on diamond surface can be regulated in the range of 1.18 to 3.24μm. The phase structure of coating from outside to inside is W, W2C and WC phase, respectively. Thermal shock experiments also show that the coatings on diamond surface have excellent bond strength as well as high temperature resistance.

The size and distribution of nanoscale precipitate particles in Ti-Mo ferrite matrix microalloyed steel under three different final rapid cooling temperatures were studied by scanning electron microscopy(SEM), transmission electron microscope(TEM) and microhardness test. The results show that the interphase precipitation could be weakened by the excessive final rapid cooling temperature. A higher supersaturated solid solubility and high-density dislocation in ferrite matrix can be obtained under a relatively lower final rapid cooling temperature, which makes it easier to precipitate in ferrite. The related thermodynamic analysis indicated that the precipitation behavior was influenced by the final rapid cooling temperature during austenite/ferrite region. It is not conducive to get a large amount of small size precipitates in Ti-Mo ferrite matrix microalloyed steel when the final rapid cooling temperature is too high or low.

Multilayer cutting is widely used in finish machining process of thin-walled parts to improve the machining precision. The paper presents a cutting allowance optimization method using genetic algorithm to improve the machining quality and efficiency of thin-walled parts in the field of aerospace. Considering the coupling relationship of the deformation between the layers in layered milling, the parameterized finite element model of thin-walled parts in side milling process is established. The best relationship between the workpiece stiffness and the cutting force is determined though iterative calculations, and the deformation caused by the cutting force can be minimized. The results show that the optimized distribution of the depth of finishing cutting was better than the experience. The method proposed in this paper can reduce the deformation of the workpiece during the machining process, and thus improve the machining accuracy.

In this study, a series of deep micro holes were machined on thick GH4169 super alloy by the trepan drilling, using a millisecond pulsed laser which equipped to the numerical control processing system. The microstructure of the holes including surface and longitudinal morphologies, diameter, taper, circularity, micro cracks and recast layer were systematically characterized. The surface morphology and the longitudinal section of the drilled holes were observed by Scanning Electron Microscope and 3D Laser Scanning Confocal Microscope. The method of Minimum circumcircle method was employed to evaluate the entrance and exit end circularity. The results showed that the melt and spattering accumulating around the holes decreased with the augment of laser power. The diameter of the entrance showed an increasing tendency with the growing of laser power, but the exit end was not seriously affected by the power. The micro cracks and recast layer could be found obviously, the micro cracks appeared in those zones which thermal stress concentrated, the thickness of recast layer is about 20μm and the taper and circularity were optimized at a laser power of 80-100W.

Jack-up platform jacking system which undertakes the weight of the platform and working load is very important during the lifting, and its performance exerts a direct influence on the safety and application effect of the whole platform. The super-modulus pinion and rack of jack-up platform jacking system are most likely to damage by fracture and fatigue pitting, which are due to the hostile environments. As a result of dynamic load, the analysis of dynamic contact has important engineering significance in an actual project. For strengthening the carrying capacity of pinion and shortening the design period, the research of carrying capacity factors is very meaningful. In this paper, the changing of stresses on the pinion and rack are gained by FEM, and main parameters that influence the carrying capacity of the pinion in a jacking system are analyzed according to the calculation method in GB standard. The study results shows the contact stresses and bending stress are higher throughout the meshing process, which implies the dangerous position of the pinion. In single meshing period, the trend of bending stress in the compression side of pinion and rack is opposite, while the bending stress in the tension side of both rack and pinion are minimum near the pitch circle. The carrying capacity of pinion can be strengthened by changing the main parameters, such as tooth width, normal modulus, pressure angle, modification coefficient, but the influence degree of each parameter is different.

The tensile failure of fiber reinforced composite is a progressive damage process. Combined with microscopic analysis measures to study matrix, fiber and interface, the failure mechanism of material would be further researched. Two different types of matrix of GFRP bars were selected in the tensile test. The results of tensile test and SEM observations revealed: the vinyl GFRP bar has better composite material structure and interface than unsaturated polyester, and the progressive damage level of unsaturated polyester bar is higher than vinyl in the same stress state; There are clear links between the tensile strength and meso-structure change with different uniaxial stress; When the load exceeds 80% of the failure load, the meso-structure exhibit obvious split between fiber and matrix, and body damage and stripping between fiber and matrix are correlative.

As a kind of environmentally friendly material, microfibrillated cellulose (MFC) has the following advantages: renewable raw materials, easy recycling, biodegradable, safety and so on. It can be combined with antibacterial agents to prepare the antibacterial packing materials for food. In this paper, the nano-ZnO was modified by titanate coupling agent TM-38s at first,determines the best dosage of TM-38 is 3% in the modification process,the dosage of the isopropyl alcohol for 40ml,improving its dispersibility. And then added in the MFC suspension to formulate the antibacterial coating for antibacterial coated paper preparation. The changes of antibacterial properties of the paper before and after coating were investigated in this study. The results showed that the paper had a significant antibacterial activity to e. coli and staphylococcus aureus (the antibacterial circle was bigger than 15 mm).When the nano-ZnO dosage was 2.5wt%, the antibacterial properties of the coated paper could reach the best situation. Application of the antibacterial caoated paper to the food packaging could restrain and kill the microorganisms on the food surface effectively, prolong the shelf life of food, and improve the food safety.

Recently, indoor localization is essential to enable location-based services for many mobile and social network applications. Due to fluctuation of the wireless signal, the accuracy of a simple WiFi fingerprint-based localization is not high. In this paper, we first exploit Pedestrian Dead Reckoning (PDR) technology to overcome the problem of the wireless signal fluctuation, then propose a PDR-aided algorithm with WiFi fingerprint matching for indoor localization, which using the PDR technology aided indoor localization. Experiments show that our algorithm has better accuracy than other indoor localization methods.

Establish the finite element calculation (solid-liquid coupling) model of uranium ion exchanging tower with ANSYS. Time-procedure analyze the pillar of uranium ion exchanging tower with seismic waves. The wave form is EI Centro seismic with M=8.0, and the time interval is 0.02 seconds, lasts 30s.It is suitable for Class 1 site soil. Simulate the stress of two important welding position of uranium ion exchanging tower under the effect of the seismic wave. Compare the simulating results with the calculating results of Anti-seismic for Petrochemical Equipment to show that model simulating is similar to that of manual. Simulating analysis has proved that the maximum stress of two welding positions of the uranium ion exchanging tower is under the ultimate strength of tower welding, so the application of uranium ion exchanging tower in seismic zone meets the requirement of anti-seismic property. And this research provides the information of main risk positions for future entity analysis.

Wind energy is clean and renewable energy with rich resources. As one of the most promising green energy, wind power has become an important part of the electricity supply. But there are still many technical problems to be solved related to wind power generation and integration, because it may have significant impact on safe and stable operation of the power grid. Therefore, the doubly-fed wind generator and direct-driven permanent-magnet wind power generator are studied. Their models are built in PSCAD/EMTDC for electromagnetic transient simulation, in order to study the characteristics of their short circuit fault current, as well as the impact on the relay protection of the wind power system. The research outcomes provide a reference and basis to wind power failure characteristics research.

Urbanization and resources-environment are two subsystems in the socio-economic development system which interact and affect each other, so it has become an urgent need to coordinate them and identify the coupling laws between them. This paper took Hubei Province as an example, built comprehensive evaluation index systems for the urbanization and resource-environment. Then, utilized the AHP (analytic hierarchy process) to calculate the weights of indexes, and estimated the comprehensive index of urbanization and resources-environment of Hubei Province during 1996-2010. The coupling degree model and coupling coordination degree model were used to calculate the coupling degree and coupling coordination degree of the comprehensive index of urbanization, resources-environment of Hubei Province during 1996-2010. Further analyzed the coupling relationship and coordination extent of these two subsystems, analyzed the timing characteristics and reasons of its coupling coordination, discussed the regularity of the mutual influence and interactions between urbanization and resources-environment in Hubei province. This will provide a theoretical reference for the urban development and management, sustainable development of resources-environment, construction of “two-oriented” society in Hubei Province.

The problem about promoting the rapid economic growth while effectively reducing CO2 emission has aroused great attention of scholars both at home and abroad. Researches show that there are differences in the relationship between economic development and carbon emissions in the different historical stages of the different regions. This paper took Hubei Province as the survey region, by means of the decomposition model of CO2 emissions, accurately calculated CO2 emissions from 2001 to 2010 in Hubei Province, selected Hubei Province’s GDP and the three industries’ GDP as indicators of economic development, used the method of grey relational analysis to calculate grey correlation degree of Hubei Province’s GDP, three major industries’ GDP and CO2 emissions, carried on the comparative analysis of the relationship between economic development and CO2 emissions of Hubei Province in combination with China’s corresponding results, specifically put forward policy suggestions on energy conservation and emissions reduction in Hubei Province, so as to provide the theoretical reference for the development of low carbon economy in Hubei Province.

It’s difficult to describe the 3d geometry and to establish the 3d model of tower equipment in OpenGL. High-level command functions to define complex three-dimensional modeling is not provided in OpenGL. This paper introduces 3d model of the tower equipment how to display dynamically in OpenGL. Interface of OpenGL import 3d model is description in detailed. Storaging format and reading file of STL (Stereo Lithography) are elaborated. How to build the 3d model is descripted. When tower equipment displayed dynamically, what is the key step to establish the model of tower equipment. The dynamic model of the whole tower equipment is displayed, in order to see clearly the structure of tower equipment.

Elliptical head is an important standard part of the separation tower equipment. It can not be generated by tensile method, rotation method, because the rotation axis can not pass region. This paper introduces the ObjectARX programming environment. It describes how to build the menu and the dialog box. ObjectARX is a secondary development tool of AutoCAD. With its function and its mechanical drawing once learned, four arcs of ellipse can be used to build 3d modeling of head.of tower equipment. The ObjectARX programming technology is applied to develop AutoCAD, making it more convenient to darw the professional 3d graphics.

Mesoporous chitosan-silica composite sorbent has been successfully synthesized by a simple and facile template-free hydrolyzing route from single cheap silica precursor of sodium silicate. The overall decolorization efficiency and capacity for sugar juice between pure chitosan and composite sorbent are very close in field pilot-scale, while much lower quantity of chitosan (only 10 wt.%) is used to build the composite sorbent. The success of increased purification performance and sorption capacity of sugar juice is ascribed to the appropriate pore structure of the composite sorbent with high surface area (395 m2/g), large pore size (7.73×10-9 m) and high percentage of accessible free amine groups of chitosan (70 %).

Phosphors of SrAl2O4:Eu2+, Dy3+ were encapsulated with polyethylene plastic film by a physical technology. Water resistance measurements, Fourier transform infrared spectroscopy (FT-IR), thermogravimetric (TG) analysis, and photoluminescence (PL) spectrophotometry were used to characterize the phosphors Results showed that the encapsulated layer was a thin film with an encapsulation amount of 4.0 wt%, and encapsulation can effectively improve the water-resistance for the phosphor without any destroy of crystal structure of phosphors.

In order to improve safety, economy and reliability of NPP(nuclear power plant) and to make the best of human, material and information resources in the NPP, a specific function model developing method for integrated managing system based on CIMS and fractal conception is discussed in this paper. Under the guidance of general requirement, the developing process is deepened from integer to local, from macrocosm to microcosm. Furthermore, under the conditions of modularization, high inter-aggregation and low coupling, the developing process has the characteristics of layered detailing of the complexity degree.

Large-scale offshore wind power has been developed in recent years, and two possibilities are considered for the transmission system between the offshore wind farms and the onshore grid: VSC-HVDC and HVAC. The paper aims to compare both systems for 300MW offshore wind farms, 25 km, 50km and 75km from the Point of Common Coupling on an economic basis using a DCF(discounted cash flow) analysis. A linear fit to the net present values has been made, obtaining the break-even distance of 47km. When the transmission distance is shorter than 47km, the HVAC system is more economic, otherwise the VSC-HVDC system is a more cost-efficient option.

In order to study hematite of different crystallography form with hydrogen peroxide to form various kinds of Fenton-like reagent in the process of phenol removal, we discuss the effect of different shapes, particle sizes and some other factors on the degradation of phenol in the process of catalysis. This article studies the synthesis of Fenton-like reagent with hematite and its role in the process of catalysis of phenol to find the most suitable crystallography form.

Cementing anchor plays an important role in prestressed cementing technology of heavy oil thermal recovery. For there are many problems of other anchor: undrillable structure, not to be satisfied the requirements of continue drilling or deepening old well, the authors have designed a drillable anchor. By the way of using finite element analysis, them obtained that the initial angle 38-40° was the best angle for eating into the formation; verified the intensity of anchor-pin system. Through cycling test, them verified the reliability of the anchor; obtained the curves of flow coefficient and the press differential with different nozzle. The analysis and experimental results is very important in guiding significance to optimize the design of the anchor and prestressed cementing operation.

Base on the data that gained from pullout test of Polypropylene fiber, multi-factor regression analysis considering water cement ratio and age of cement matrix, length and angle of embedded fiber was carried out. Then, a practical function of pullout force-displacement was proposed, which is well agreed with the test results.

In this paper, the temperature stress of singer piece was calculated by FEM and the stress reaction of PP fiber and steel fiber was analyzed. It is knew that the fiber with lower elastic modulus and lagerer spacing can provide weaker constraints and the restriction stress of fiber concrete is smaller. The calculation result of fiber reason space between is consistent with the common value in engineering.

In this paper, the problem of maximizing the average throughput of a CRN through setting proper sensing sequences is investigated. In order to find the optimal sensing matrix, we obtain the spectrum sensing sequence. The structure of the proposed scheme is discussed in detail.

An aryl benzyl ester dendritic axially substituted silicon (IV) phthalocyanine, a di-{3,5-di-(4-methoxycarbonyl group benzyloxy) benzyloxy) benzyloxy} axially substituted silicon (IV) phthalocyanine (DSiPc) was synthesized. Its structure was characterized by elemental analysis, 1H NMR, IR and ESI-MS. The photophysical property of DSiPc was studied by steady and time-resolved spectroscopic methods. The steric hindrance of dendritic structure can reduced the aggregation efficiently. The photoinduced intermolecular electron transfer between this novel macromolecule and benzoquinone was studied. The results showed that the fluorescence emission of this dendritic phthalocyanine could be quenched by BQ. Therefore, this novel dendritic phthalocyanine was an effective new electron donor and transmission complex could be used as a potential artificial photosynthesis system.

Government departments of different areas are needed during the construction and operation process of intelligent transportation systems. So there is a contradiction that systems must be integrated but they need to be constructed and operated by different organizations. The division of the construction mission among different organization and the rules that all the joint members have to obey should be clear so that repetition and confliction in the whole system can be avoided. These modes of mission division are compared in this paper to provide a reference for our ITS construction and operation mode selection.

A long-span cable-stayed arch bridge is a new form of bridge structure that combines features of cable-stayed bridges with characteristics of arch bridges. In the present study, we derived a practical calculation method for the lateral destabilization critical loading of cable-stayed arch bridges during the construction process based the energy principle. The validity of the method was verified with an example. The calculation method provides a quick and efficient way to evaluate the lateral stability of a cable-stayed arch bridge and a concrete filled steel tubular arch bridge during the construction process.

The induced voltage generated by AC submarine cables would effect the normal operation of communication cables nearby. The paper calculated the induced voltage generated by AC submarine cable according to formula and procedures related to magnetic induction. The maximum parallel length between submarine cable and communications table was calculated under horizontal arrangement, and shielding effect was taken into account to the impact of the results. The causes of various induced voltage on communication cable were analysed under normal operation and various fault conditions. The results show that the induced voltage on communication cable is proportional to the parallel length and inversely proportional to parallel spacing. When the parallel length does not exceed a certain value, the induced voltage is in the allowable range and will not affect the normal operation of the communication cable.

In order to find out the correspond relationship of the outlet velocity and rotor speed in dry powder inhaler, the intermediate parameter was inserted in Workbench response surface based on CFD. The simulation of the suction drive rotor rotation mechanism was based on MRF model in FLUENT. It can be easily obtained the rotor’s performance curve under different aerodynamic conditions and found out the optimized flow rate is 66.127L/min. This method verifies the clinical phenomena and could guide the clinical research and machinery optimization.

Foam aluminum is a novel porous functional material. There are many methods for preparation of foam aluminum, wherein an infiltration casting method in the liquid phase method can be selected for the preparation. In the forming of a pore structure of the foam aluminum, infiltration depth and pore uniformity are mainly influenced by technological parameters including particle size and preheating temperature of particles and a mold, molten aluminum casting temperature and vacuum degree.

The effect of slag treatment with Copper addition in silicon purification by metallurgical methods was examined in this paper. The microstructures and contents of Si-Cu alloy after slag refining were investigated by XRD and ICP, respectively. The majority phases in the Si-Cu alloy were Cu3Si and Si. The partition ratio of boron (LB) between slag and silicon was studied with and without Cu addition. Experimental results show that slag treatment with Cu addition can improve the LBin CaO-SiO2-CaF2slag system, where a maximum boron removal ratio of 85% could be achieved.

As wind power in China is developing more and more rapidly, the characteristics of wind power output such as randomness and volatility have brought great pressure to the system peak load regulation. On the basis of defining negative peak regulation ability, this paper gives out the calculation formula of negative peak regulation ability including wind power and the main factors of influencing the negative peak regulation ability are calculated. Aimed at the regional power grid in the target year 2014, this paper makes some analytical prediction on such main factors and calculates the negative peak regulation ability, and the amount of the acceptance of wind power bound by it, and makes some sensitivity analysis of the negative peak regulation ability and the amount of the acceptance of wind power.

"Excellence Engineer education program" is an important move to promote the engineering education power in China. In most colleges, the implementation of “excellence Engineer education program” relies mainly on industrial basic training course (also known as metalworking practice) to improve the engineering quality of students. Students learn basic knowledge, theory, and skill in classroom, and fundamental industrial training course further allows students to develop problem solving capability in real world by offering fundamental engineering training. Technology advancement drives deeper technology specialization, requiring college students to develop higher level of engineering competence, including fundamental technology capability, fundamental engineering capability, and creativity. This article draws from working experience, summarizes and analyzes three new measures of industry training, including (1) lab assistant, (2) creativity project, and (3) open lab guidance. The article also discusses the roles of these measures for improving student engineering competence in the implementation of “excellence Engineer education plan”.

The dry shrinkage deformation of polypropylene fiber mortar was analyzed by ANSYS software and compared with experiment value in this paper. The error of the calculated and experimental results in the 14 days and 28 days are 7.8% and 10.5%. It can be found that the calculated results are in good agreement with test results. The results indicate that the dry shrinkage value of polypropylene fiber mortar is lower than ordinary mortar. Adding polypropylene fibers can inhibit the process of cracking and improve the fracture toughness of cement-based materials.

Xianning is located in the fourth pole of economic growth core area of The Central Triangle, through the location entropy analysis method we can know that, tourism industry is an advantaged industry in Xianning and the adjacent region of The Central Triangle, and have their own advantages and characteristics of tourism resources. According to the space constraint issues on function realization of advantaged tourism resources in Xianning, space breakthrough strategy based on The Central Triangle pattern has been presented.

It is of great importance to innocuity, minimization and reutilization of manganese slag generated in manganese products by electric furnace process. In the paper, ordinary Portland cement is replaced by manganese slag part then to evaluate manganese slag's influence on the mechanical properties. The experimental results obtained show that ordinary Portland cement added less than 20% by manganese slag was improved in mechanical performances and the cement concrete added less than 20% by manganese slag was not changed significantly. To reduce the economic costs, enhance mechanical properties, manganese slag can replace part of cement concrete.

The optimal control of carbon content is one of the most important factors of excellent properties of tungsten steel material. The control of carbon content in tungsten steel materials could be started from several ways. This paper discusses the control of carbon content of tungsten steel material in sintering process. In this paper, that is the main measure to control the carbon content in the sintering process: The control of balance between hydrogen and carbon in pre sintering process; The control of balance between carbon and oxygen in vacuum sintering.

PWM rectification system with fixed parameter PI can not meet the situation of mutational load and changing from energy feedback status to controlled rectification status. In the PWM rectification system traditionally basing on voltage oriented vector control, traditional voltage loop PI controller was replaced by PI adaptive controller with combination of single neuron and expert system. It is a good solution to the problem. In this paper a simulation model of controlled rectification system in the platform of Matlab/Simulink was established. It appled the S function and get the PI regulation with combination of single neuron and expert system. At last, the paper get the comparison of the simulation results before and after the improvement when load changed and status transformed. The results showed that system of the PI adaptive controller has the faster reaction speed and better robustness. It verified the validity and feasibility of the method.

Doubly-fed induction generator has become one of most popular generators driven by wind due to its superior behavior in power system. Because of the different physical structures between doubly-fed induction generation units and normal synchronous units, they behave differently in the failure of power system. Based on the analysis of transient behavior of doubly-fed induction generator units, the transient stability of power system integrated with doubly fed induction generator considering different integrating points is discussed. The simulation results verify the validity of the conclusion at the last of this paper.

In the process of wire electrical discharge machining, the wire electrode inevitably suffers bending deformation due to wire tension, electrostatic force, electrodynamics force, etc., and the deflection would make an clearly negative impact upon the machining accuracy, productivity and stability. In this paper, first of all, a novel modeling and simulation method is proposed for quantitatively calculating the wire deflection. Secondly, the mainly impact factors and trend of wire deflection have been concluded. Moreover, the feasibility of the model is proved by comparing with other researchers models. Eventually, the practical approaches of reducing wire deflection and improving the machining accuracy have been proposed.

Wire electrical discharge machining (WEDM) is extensively used in the mold, instrument and manufacturing industries, and rough cutting operation in WEDM is treated as a challenging process because improvement of more than one machining performance measures viz. metal removal rate (MRR), roughness (Ra) are sought to obtain a precision work. In this paper, first of all, a set of Taguchi experiment (L18 21×34) is carried out based on the Taguchi method. Secondly, two groups of ANOM are completed to obtain the influence trends of each parameters on material removal rate (MRR) and roughness (Ra), respectively. Eventually, three groups of best process parameters combination are acquired to meet high material removal rate (MRR) and low roughness (Ra) simultaneously, it can provide guiding significance to actual machining process.

The Mg-12Gd-3Y-1Sm-0.5Zr (wt.%) alloy was prepared. After solution and aging treatment, the microstructure and mechanical properties of alloy was investigated. The results show that the experimental alloy is mainly composed by α-Mg matrix and Mg5Gd, Mg24Y5, Mg41Sm5 phase. The experimental alloy has excellent creep properties at 200-300°C/50-70MPa.

Large gantry machining centers are used for machining of products in almost all industry. To raise the design and production efficiency of machining centers, an integrated method of fast design and analysis is proposed in this paper. Firstly, large components unit structures are decomposed and extracted based on functions and structures. Then, after conducting fast analysis using APDL programming, a method of Comprehensive Evaluation is employed to optimal select the design schemes. Finally, the column of large gantry machining center QLMT6300 is taken as example to illustrate the validity of the method presented.

PVP/[Sr (NO3)2+Mg (NO3)2+TEOS+Eu (NO3)2+Dy (NO3)2] composite nanofibers were prepared via electrospinning, the effect of different electrospinning parameters on the composite nanofibers morphology were investigated. The results revealed that diameter of the composite nanofibers increased at first and then decreased with the increasing of voltage, and the properties of the spinning solution (viscosity and surface tension) increased gradually, but the conductivity decreased at first and then increased with the increasing of PVP content. SEM analysis indicated that its easy to get a good morphological and uniform composite nanofibers when the voltage was 13 ~ 15 kv, inorganic salt content was 5% ~ 6%, and concentration of PVP was 15%.

Activated carbons (AC) were produced by chemical activation with potassium hydroxide (KOH) at 800°C from chars that were carbonized from reedy grass leaves at 450°C in N2atmosphere. The effects of the weight ratio of KOH/char ( impregnation ratio), activation temperature and duration time were examined. Adsorption capacity was demonstrated with iodine number. BET surface area, pore volume and pore size of activated carbons were characterized by N2adsorption isotherms. The maximum surface area and iodine number of the AC was 1100 m2/g and 1080 mg/g produced at 800°C for2h and impregnation ratio is 4:1.The characteristics of activated carbons were determined by Infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). Thermal gravimetry (TG/DTA) analysis of raw material was carried out.

The capacity credibility of a wind farm is the basic index to evaluate the value of its power generation capacity. As an important reference for the wind farm planning and site selection, calculation of wind farm capacity credibility is significant. Based on a sequential Monte Carlo simulation approach, this paper proposes a parabola calculation method for the wind farm capacity credibility. The method first uses an autoregressive moving average (ARMA) time series approach to simulate the hourly wind speeds, and then set up the reliability model of the wind energy conversion system (WECS). Finally, the parabolic method is used to calculate the effective load-carrying capacity (ELCC), which is the most important part of the capacity credibility of the wind farm. As a testing scenario, the IEEE-RTS79 test system is used to verify the method, and the difference of capacity credibility under different reliability indices is also analyzed.

The effect of complex adding Nd and Sm elements (0.8~4wt %) on the microstructures and properties of AZ81 magnesium alloy were studied. The results show that the microstructure of the alloy was refined obviously after complex adding Sm and Nd elements. The grain sizes were declined from 98μm to 77μm, and β(Mg17Al12) phases which had a broken network distribution in alloy were decreased. At room temperature, when the addition of Sm and Nd increased to 1.5%, 0.9% respectively, the alloy had a tensile strength of 283MPa which was 10.55% higher than the base alloy. At the temperature150°Cand175°C, the tensile strength of the AZ81 alloy with 1.0% Sm and 0.6% Nd reached 208.8MPa and 176.5Mpa respectively which was 10.01% and 8.37% higher than the base alloy respectively.

Satellite navigation system has been widely used in various fields, because of the signal which is received on the ground is weak and the low ratio of signal to interference, the signal is susceptible to be interfered. The adaptive antenna system using power inversion algorithm with information technology is very suitable for the weak signal and strong interference. The paper presents a detailed analysis on the principle with information technology. By building the hardware circuit in the QuartusII, the self-adapting anti-interference system of power inversion algorithm with information technology which based on Linearly Constraint Minimum Variance (LCMV) criterion can be achieved. The correctness of the theoretical analysis and correctness of the design are verified by experiment, the requirements of satellite navigation receiver on the side of anti-interference has been also proved.

The influence of the porosity of the structure on the shallow water wave-Induced seepage force on the bottom of porous vertical circular cylinder resting on porous elastic seabed has been investigated. Based on the shallow water diffracted wave theory and Biot consolidation theory on wave-induced seepage pressure, the analytical solutions to first order cnoidal wave diffraction by porous vertical circular cylinder and wave-induced seepage pressure are obtained by the eigenfunction expansion approach. Numerical results show that cnoidal wave-induced uplift and moment may have same order of magnitude as the horizontal cnoidal wave force and moment , and the body porosity of the structure may lead to a reduction both in direct cnoidal wave forces and in the cnoidal wave induced seepage moment. Compared with Airy wave theory, in certain shallow water conditions, the shallow water wave theory can more effectively reflect wave nonlinearity effect in wave load prediction.

The harm of bridge deformation is serious, real time monitoring of bridge deformation is important to ensure the safe use. Over the years, the routine measuring method is unable to complete the multiple, dynamic monitoring. This paper discusses the method of multi-points instantaneous monitoring by using GPS technology, makes a great contribution to improve the technology of bridge detection, and has achieved good results.