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Graphene is a two-dimensional material consisting of single atomic layers of graphite. Its quality is markedly different from conventional graphite and semiconductor material. In this paper, electrical conductivity and Hall Effect of the graphene were measured at room temperature by Var der Pauw method. An ohmic contact of the sample and the electrodes was constructed and tested before the measurement of Hall Effect. With the help of the Var der Pauw method, the Hall voltages of the samples were measured under the static magnetic field and different input currents. Sequentially, a series of Hall parameters of graphene were obtained. The results shown that the Hall coefficient RH is 7.00*10-7 m3/C; the carrier concentration n is 10.52*1024 m-3 that is fifteen orders of magnitude bigger than silicon; the Hall element production sensitivity KH is 6.87*102 m2/C and the carrier mobility was 1,882.54 cm2·V-1·s-1 which is much bigger than silicon. The measurement results in this paper can provide some reference for graphene’s research and application in related areas.

Built-in VOF model and k-ε turbulence model in Fluent were used to simulate the evaporation and diffusion of the pool formed by leaked UDMH on a cliff. Different situations in three wind speeds were calculated, and the diffusion mode and concentration distribution law were analyzed. The results show that there is a large poisoned area formed on the cliff, and people under the cliff should escape to upwind immediately and the emergency personnel should access the accident spot along the back of the cliff.

Acoustic transform algorithm plays an important role in sound pressure reconstruction. According to a new sound pressure reconstruction of near-field acoustic holography based on Fourier transform-source simulation technique, this article through a simulation experiment with the models of Simply Supported Plate Sound Source, verify the feasibility of the method. Furthermore, in order to verify the effectiveness of this method, this paper analyzes the impact factors that affect the accuracy of the Reconstruction. And it does simulation analysis mainly from the parameters of the Virtual Source Plane, the Distance of the Holographic Measurement and the parameters of the Holographic plane. Therefore this study provided referencing basis for later study on complex field of sound pressure reconstruction based on this technology.

In order to analyze the influence of temperature on evaporation of liquid propellant leaking jet, and to find measures to decrease the evaporation quantity, the mathematical model of the jet evaporation was established, and an example calculation was carried out by use of Fluent. The result shows that the evaporation quantity of propellant jet reduces obviously when the environmental temperature drops down, and it can be also reduced by using propellant with high boiling point.

Exhaust of propellant vapor in a confined space in case of forced ventilation was simulated by use of software Fluent. Calculated several situations, such as different vent position, vent number, and ventilation speed. The result shows that the lower of vent position, the more obvious the exhaust effect, and the more the vent number, the better the exhaust effect, and the higher the ventilation speed, the rapider the decrease of concentration of propellant vapor.

A damage identification method is proposed to identify the damage style and the damage parameters. By driving a pair of PZT patches out phase and in phase, the electric admittance of the PZT is obtained. The damage parameters are then identified from the changes of the admittance spectra caused by the appearance of damage. By comparing the identification result, the damage style can be determined and the damage parameters can be obtained. The middle basic particle swarm optimization algorithm is employed as a global search technique to back-calculate the damage. Experiments are carried out on beams. The results demonstrate that the proposed method is able to identify the damage style, and can effectively and reliably locate and quantify the damage in the beam.

In this study, Ti-45Al-7Nb-4V alloy protective coating which base on γ-TiAl phase was deposited on the surface of 5803 aluminum alloy by supersonic particles deposition technology. Researchers observed the micro-structure of the TiAl alloy casting and coating by SEM, and researched the electrochemical characteristics and the galvanic corrosion between TA2 titanium alloy and 5083 aluminum alloy or TiAl alloy casting and coating by electrochemical work station. The results show that,the galvanic corrosion current between 5083 aluminium alloy and TA2 titanium alloy declines from 16.2μA to 0.27μA after TiAl protecting coatings are prepared on the substrates, besides, the corrosion susceptibility drops from E degree to A degree. It also manifests that the 5083 aluminium alloy with Ti-45Al-7Nb-4V coatings can be contacted and utilized with TA2 titanium alloy directly, which tackles the issues of gavanic corrosion prevention between aluminium alloys and titanium alloys.

Facing climate change, developing low carbon economy has become an inevitable solution for China. This essay tries to establish the evaluation index system in five aspects, namely low carbon energy consuming level; low carbon technological level; economical developing level; social support level and natural environmental level. Meanwhile, by using factor analysis method and analytic hierarchy process, it comes to the conclusion that the low carbon development level of Hunan province is on a trend of increasing improvement, nonetheless there remains room for amelioration to reach the low carbon economy standard，and Finally, it propose the measures for energy saving.

This paper is about how to design an improved anti-ribboning method for the winder system. The system is based on the principle of a brushless DC motor control, which constantly changes relative velocity between the grooved drum and the yarn bobbin. This in turn, causes the changing of the winding ratio value. Therefore, it will accomplish the anti-ribboning control. Compared with the traditional anti-ribboning methods, the improved method can save more mechanical components and maintenance costs. Also, this method can develop different programs for different yarns. Therefore, this method is more efficient and versatile.

Previous studies demonstrated that 20(S)-ginsenoside Rg3 (20S-Rg3) could effectively inhibit tumor cell proliferation as well as K+ channel currents expressed in xenopus oocytes. However, the effect of 20S-Rg3 on the growth of human glioma cells and the ion channels expressed in tumor cells was rarely reported in the literature. In the present study, we investigated the effect and the underlying mechanism of 20S-Rg3 on cell proliferation and apoptosis of human glioma U87-MG cells. In vitro results exhibited that 20S-Rg3 had potent cytotoxic effect and significantly inhibited the proliferation of U87-MG cells in a dose-and time-dependent manner. Typical arrest at G2/M phase was induced, and the apoptosis rate of U87-MG cells was significantly higher in the 20S-Rg3 treatment group than in the control group. Electrophysiological results showed that 80 μmol/L 20S-Rg3 substantially inhibited voltage-gated K+ currents of U87-MG cells. Together, these results suggest that the suppression of voltage-gated K+ currents might play an important role in the 20S-Rg3-induced cell death, and these new findings provide useful data for further study of the antitumor effect of 20S-Rg3.

The virtual reality technology is used in the mine training simulation areas, which can overcome the limitations of traditional training methods effectively. It can also improve the quality of mine training simulation greatly, reduce training costs, and the users can achieve safe and convenient training. In this paper, a dynamic collision detection algorithm is proposed based on the prediction of the movement direction of a virtual hand, and it is the effective collision detection algorithm using data glove in the mine training simulation system. Compared with the traditional static collision detection algorithm in the performance, the dynamic algorithm is proposed to solve the collision detection between one simulation solid model and another one, and to achieve the function that a virtual hand grip and rotate virtual objects in the virtual environment. The dynamic collision detection algorithm can be extended to other simulation systems.

The main purpose of designing an evaluation method for routing strategy is to accurately evaluate the performance of a series of routing strategies at various network loads, including under-load, full- load and even overload. Most researchers evaluate the effectiveness of a new routing strategy with the method of OrderParameter. However in this evaluating process, we find that its result distributes in a certain range of values instead of a single value, soOrderParameterintroduces a considerable error, it is difficult to evaluate the performance of a routing strategy accurately in different network load with it. To solve this problem, a method--ImprovedOrderParameter (OOP)is proposed. This method can not only get a fixed critical value for a special network load, but also depict the transition of network load over time. According to simulation experiment, theOOPcan be more objective to evaluate the performance of a routing strategy at various network load.

Polypropylene (PP) and ethylene vinyl acetate copolymer (EVA) were treated with intumescent flame retardants containing caged bicyclic phosphates. The behavior of thermal degradation of the flame-retarded PP and EVA were studied by TG, DSC, and the FTIR spectra of PP’s residues at different temperature were recorded. In addition, the possible thermal degradation and char formation mechanisms were analyzed and discussed.

The main objective of this paper is to design and implement an accord localized, low price, fully functional, human resource management information system for people to use the habits and characteristics of the situation. Human resources management information system has become service providers, employee care and human resources consultant. Help enterprises to complete the functions of strategic human resource management.

This paper argues that MOOC is really a great opportunity to higher education in the west, but MOOC is not panacea, has its own limitations. Perhaps MOOC can help the Faculty to promote their theory and technology, change the students’ learning methods, and optimize the management processes. But not all learners entered MOOC will become active learners. Compared with the traditional network courses, MOOC has a free open mode, large-scale, community, self-organization and other characteristics, which will bring the huge innovations to universities in the western regions. With the development of western area, people eager for new knowledge, MOOC will have a huge impact on higher education in the west.

Computer software is an information product [2]. Since the rising of the computer software industry during the 1960’s, the dispute into the best way to protect computer software has never stopped. Human society has already entered the information age, the development of the computer software industry is happening more rapidly than ever before. The application of using legal means to effectively protect computer software, is not only crucial to the development of the computer software industry, but also for national science and technology, the development of the economy is of great significance. This paper summarizes the present situation of international protection of computer software, based on the analysis of the quality of copyright law, patent law, and trade secret law to protect computer software and the analysis of the protected mode all over the world, put forward the author’s suggestions for the legal protection model.

In order to improve the intelligibility of the noisy speech, a novel speech enhancement algorithm using distortion control is proposed. The reason why current speech enhancement algorithm cannot improve speech intelligibility is that these algorithms aim to minimize the overall distortion of the enhanced speech. However, different speech distortions make different contributions to the speech intelligibility. The distortion in excess of 6.02dB has the most detrimental effects on speech intelligibility. In the process of noise reduction, the type of speech distortion can be determined by signal distortion ratio. The distortion in excess of 6.02dB can be properly controlled via tuning the gain function of the speech enhancement algorithm. The experiment results show that the proposed algorithm can improve the intelligibility of the noisy speech considerably.

Steel and concrete composite slab is a new type of bridge deck, which is consist of steel plate and concrete slab connected by shear connectors such as perfobond ribs ( usually abbreviated as PBL), studs and so on. Static experiment about four pieces of one-way steel and concrete composite slab using PBL was carried, and the whole-process structural behaviors and failure mode were investigated. Based on the spatial beam element model with the degenerated theory, the nonlinear finite element analysis on experimental specimens was executed. Such structural behaviors as concrete cracking, yield of steel plate, crushing of concrete, and so on are simulated, and are compared with the experimental results. It can be observed that excellent agreements are achieved between experimental results and numerical simulation.

In order to solve the problems of seam tracking for automation welding of large welding structure, this paper has respectively built mathematic model for length of magnetic-control arc according to two typical forms of weld pass in multi-pass welding for V-groove seam. By using Matlab/Simulink to analyze the transformation discipline of welding currents, a method for deviation acquisition based on magnetic-control arc sensing for multi-pass welding is proposed. Welding experiments demonstrates that the method proposed can effectively resolve the dilemma of deviation acquisition during multi-pass welding for thick plates with V-groove seam.

Exfoliated graphite with large expanding volume (EV) was prepared by two-step intercalation, in which the mixture of nitric acid and phosphoric acid, and that of nitric acid and acetic acid were employed as intercalating agent step by step, and potassium permanganate was used as oxidant. Its preparation conditions were optimized by orthogonal experiment and parallel experiment, and its microstructure was analyzed by scanning electron microscope. The results show that the optimal preparation conditions for the first step intercalation are as follows: the mass-volume ratio of natural graphite (NG) to mixed acid is 1: 4, the volume ratio of nitric acid to phosphoric acid is 1: 2, the mass ratio of NG to potassium permanganate is 1: 0.2, and the reaction temperature is 20~30°C for 40~60 minutes. Those for the second step intercalation are as follows: the mass-volume ratio of acidized graphite (AG) to acetic acid is 1: 5, the mass-volume ratio of AG to nitric acid is 1: 1.5, the mass ratio of AG to potassium permanganate is 1: 0.15, and the reaction temperature is 20~30°C for 40~60 minutes, the EV is 450ml/g under the conditions listed above. The interlayers of graphite are fully opened and become a worm-like fluffy rope.

800MPa grade Advanced High Strength Steels (AHSS), Complex Phase steel CP800, containing microalloying elements, are chosen to test the stamping properties in different test conditions and compared with traditional high strength low alloy (HSLA) steels HSLA S700MC. Tensile test, and HAT shape stamping test are taken to investigate the properties of the materials. Test results indicate that the studied 800MPa grade AHSS shows a better strength ductility balance compared with the reference HSLA steels. Under the same HAT shape springback stamping condition, HSLA steels S700MC always show the largest springback deformation among the investigated steels. While springback angles of all the AHSS studied are markedly smaller than that of steel S700MC. Among the 3 kinds of AHSS researched, CP800T always show the largest springback deformation. Domestic steel CP800 and imported CP800S show much smaller springback deformation respectively. In BHF of 100KN condition, springback deformation of 3 kinds of AHSS reaches the top value among all the BHF conditions. However, steel CP800 indicates an outstanding springback restrain trend in blank holding force (BHF) further increasing attempt. Thus, springback behavior can be restricted obviously by using a larger blank holding force (BHF) in steel CP800 stamping cases.

With the HVDC transmission projects developing rapidly, the relevent electromagnetic environment problems are widely concerned, of which the transient electric caused by the conductor electrification in ionized field may seriously influences the feelings of people. To invesigate the tansient electric shock procedure, the transient current is measured in the experiment. The simulation results agrees well with the measured values and the validity of the simulation model is verified. The simulation results show that the resistance in the discharging circuit can reduce the current evidently. It is also found that the metal objects under the HVDC lines should be grouded to avoid discharging when touched by the people.

In this paper, a formula for the calculation of carbon content during austenitizing of cast iron was deduced, considering the effect of silicon content on the heat treatment parameter. According to this formula, the carbon content of the austenite in a certain austenization temperature for a cast iron with given components can be easily calculated, and the austenization temperature for getting the expected carbon content in the austenite can also be determined. Besides, according to the relationship between austenization temperature Tx and the according carbon content Cax, and considering the effect of silicon content, the diagram of Cax, Tx and silicon content during the austenitizing process of cast iron was made.

nformation integration refers to the problem of merging, coalescing and transforming autonomous heterogeneous data sources into a single global homogeneous database and providing a unified view of these data for future query processing purposes. One of the fundamental operations in the integration process is schema matching, which takes two schemas as input and produces a mapping between the attributes of the two schemas that correspond semantically to each other. Matching techniques can be grouped into two broad categories: schema-level matching and instance-level matching. In schema-level matching, we consider only the properties of schema elements, such as names, descriptions, data types, constraints and structures. For each match candidate pair of attributes, the degree of similarity is estimated by a normalized numeric value between 0 and 1. On the other hand, instance-level matching employs information available in the data contents of each table to determine the relationship between any two attributes. In this paper, we propose a statistical model to compare the likeliness of two lists of values under two attributes from separate databases, in order to derive the similarity ratio of the two attributes. Our framework provides efficient procedures to compute the degree ratio using statistical coefficients for both categorical and numeric attributes.

Radio interference is an important issue that must be considered in designing HV transmission lines. It is caused by corona current which is due to the complex movement of charged particles around the conductors. Corona current has the characteristics of wide spectrum and strenuous diversification, so it is difficult to measure. In this paper, a corona current measurement system is developed for the investigation of HV test line. The measurement principle and system configuration is described. Problems such as high-voltage insulation, high-frequency signal sampling, interference suppression, signal record and transmission etc. are considered. The system has high measuring accuracy and the characteristic of small size, light weight and easy operating. The signal would not be interrupted and transferring data and the safety of person is ensured. The feasibility of the developed measurement system is validated by the experiments carried out in laboratory.

Chinese gum rosin were digested by microwave-assisted sample digestion, and then the metal and semimetal elements in it were detected by inductive coupled plasma optical emission spectrometer (ICP-OES). Most metal and semimetal elements mass fractions in gum rosin are less than 5.0mg/kg, among which mass fractions of Al, Ca, Fe, Mg, Na are relatively higher. Some metal and semimetal elements in gum rosin may influence auto-oxidative rate to bring about color changing.

In order to observe the attraction effects of the artificial reef models onAlepocephalus, the behavior and distribution ofAlepocephalusin the experimental flume under the presence of five reef models with different shapes and structures were studied using experimental ethology method, and the attraction effects of different reef models were compared. The results indicate that the distribution ofAlepocephalusis rather dispersed when no reef model is put into the marked area of the flume, and they prefer to stay in relatively dark area. In this case, theAlepocephalusdistribution ratio of the reef marked area is 7%. When reef models are put into the marked area,Alepocephalusshows obvious positive taxis to them. And theAlepocephalusdistribution ratio of the reef marked area increased to a level between 16 % and 29 %. In addition, the apertured cubical reef model shows the best attraction effect with a distribution ratio of 29 %.

Deposition behavior of Al-Si particles coated on magnesium alloy by Supersonic Particles Deposition (SPD) was investigated by numerical stimulation. The results demonstrated that critical velocity for Al-Si particle to deposit successfully on ZM5 magnesium alloy was about 700m/s; At collision interface, the temperature gradient increased, effective plastic strain change suddenly and stress reduce rapidly to zero. The compression ratio of deposited particles increased. Contacting area at interface enlarged with particle initial velocity increasing. Meanwhile, experimental observation of surface and cross-section morphology of Al-Si coating on magnesium alloy exhibited that, intact particles, fragmented particles and fine particles co-existed in the coating. And the coating was formed by mechanical bonding and metallurgical bonding.

Effect of Supersonic Particles Deposition processing parameters on porosity and bonding strength of Al-Si coating on the surface of ZM5 Magnesium alloy was studied. The result shows that the porosity rates of Al-Si coating are all below 0.6% and the bonding strength is all above 35MPa. With air pressure increasing, the porosity of Al-Si coating reduces to below 0.3% and the bonding strength increases to above 40MPa. With spray distance increasing, the average percent voids of Al-Si coating tends to increase and the bonding strength is better between 160mm and 200mm. The minimum porosity and the maximal bonding strength of the coating can be reached when the speed of feeding powders is at 6r/s.

Two kinds of exfoliated graphite have been prepared from graphite flake and graphite powder, and their preparation conditions were respectively optimized by orthogonal experiments and parallel experiments. The effect of graphite size on the characteristics of exfoliated graphite was researched. The microstructure of two kinds of exfoliated graphite was measured by SEM. The results show that the optimal preparation conditions for exfoliated graphite flake are as following: the mass-volume ratio of graphite to mixed acid is 1: 4, the volume ratio of nitric acid to phosphoric acid is 1: 2, the mass ratio of graphite to potassium permanganate is 1: 0.1, and the reaction temperature is 25°C. For exfoliated graphite powder, the optimal mass ratio of graphite powder to potassium permanganate is 1: 0.22, and the consumption of oxidant for exfoliated graphite powder is more than that for exfoliated graphite flake. The longitudinal expansion of graphite flake is more apparent than that of graphite powder and leads to a worm-like fluffy rope.

tructural health monitoring based on piezoelectric technology has the features that are sensitive to early damage, insensitive to the environment, low cost and suitable for monitoring on-line. It has received more and more attention. In this thesis, the actualities of Impedance-based structural health monitoring are introduced for future reference.

Lamb Wave testing based on PZT has features that are sensitive to plate thickness direction, low cost and suitable for long distance. It has received more and more attention. In this thesis, the principle of Lamb Wave testing method is introduced, research status and image processing technology is summarized, and future work is outlook.

The thermal isomerization reaction of isopimaric acid was studied by a treatment at different temperature of 250 °C, 260 °C and 270 °C for 1-5 h under the protection of nitrogen. The isomerization mechanism of isopimaric acid was illuminated. Isopimaric acid was remarkably isomerized to 8, 15-isopimaric acid and sandaracopimaric acid, the higher thermal treatment temperature combined with longer thermal treatment time, the faster isomerization rate of isopimaric acid was observed. It was found that the isomerization rate of isopimaric acid towards 8, 15-isopimaric acid was faster than to sandaracopimaric acid. The decomposition reaction of pimaric-type acids occurred slightly in conditions of 250 ~ 270 °C.

By experimental and comparison method, printing characteristics of light paper were studied. A test form was designed for monitoring reproduction processes and evaluating reproduction characteristics. Then it was output on film, plates, and paper in turns. Results showed that performance of paper has a direct impact on reproduction quality; prints made by light paper have less color saturation, lower print contrast, much dot loss in light areas and less color gamut than those by offset paper. However, the difference between them was very small. Under good control this environmental friendly paper was absolutely able to the high quantitative offset paper in book printing. Effective measurements of improving printing quality on light paper printing were derived

The temperature stress calculation of multi-storey structure is very complicated. Many researches have been taken for the frame structures with rectangular plane, but very few references about annular plane. Based on the ANSYS program, the structure temperature effect of a multi-storey reinforced concrete frame which plane shaped like the elliptic is analyzed in this paper. The overall temperature load and concrete shrinkage equivalent temperature are considered in the analysis. The results reflect that curvature has an apparent influence on the temperature stress of annular super-long structure. Besides, the structure temperature effects are studied on both cases of the structure with expansion joint and without it, which shows that reasonable installation of expansion joint can decrease the temperature stress of annular structure. The influence of structure member rigidity on temperature effect is also discussed by changing the size of the section; all of these could offer reference for engineering design.

The large pendulum is a new kind of amusement devices. Virtual modeling and dynamic simulation based on virtual prototyping technology have been done for the structure analysis of the large pendulum. The speed, acceleration and load curves for each component on the large pendulum under different operation conditions have been acquired, which provides a reliable basis for further strength and security analysis. The result shows that the virtual prototype and dynamic simulation is an effective way to enhance the design reliability of the large pendulum.

With respect to the failure of drive shaft of a large pendulum, a finite element software is used to analyze its stress. The results indicate that the failure is caused by inadequate design of the fatigue strength of the output shaft. Chamfer is the main reason for changing the fatigue strength safety factor, in addition, the drive system may also cause the stress of output shaft too large. At last, specific equipment improvements and shaft failure countermeasures is put forward.

Geothermal energy is a renewable energy source most abundantly associated with volcanism. In this paper, we report the progress in the application of remote sensing technology for prospecting the geothermal energy potential in Xilingol, a Cenozoic volcanic area in the eastern Inner Mongolia, NE China. Landsat TM images are processed in combination of existing geological and geographical data in the interpretation of faults and volcanic craters. Land surface temperature (LST) has been retrieved with a single-channel algorithm. Through the analysis of geological data and the distribution of the LST, seven prospective geothermal areas have been identified for further study.

V2G technology achieves a two-way interaction of the grid and electric vehicles (EVs), it makes plug-in hybrid electric vehicle (PHEV) be able to access grid and participate in grid scheduling. By V2G technology, PHEVs can provide FM and spinning reserve ancillary services such as economic dispatch. With the extensive use of plug-in hybrid electric vehicles (PHEVs), its important impact on charge and discharge process will be the grid safe and economic operation. Firstly, the article proves the V2G discharge capacity of a normal distribution from the theory, and based on which to establish a stochastic economic dispatch model. The results which obtain by using the IEEE 14 node system simulation show that this conclusion of the constructed model is feasible and effective, and the conclusions that the V2G node optimal active output power and minimum scheduling cost expectations are proportional to the the V2G discharge capacity expectations are also obtained.

High renewable energy penetration in power systems may bring a series of problems such as frequency fluctuations. Plug-in electric vehicles (PEVs) and controllable loads have been shifting into focus for this. A dynamic vehicle-to-grid (V2G) model with feedback control is proposed by considering the battery charging/discharging characteristics and the dynamic model of frequency regulation with PEVs and controllable loads for a single area is established. Simulation results demonstrate that the application of PEVs and controllable loads can relief the frequency refutation due to the randomness of renewable energy sources.

Being one of the key parts in high-speed traction motor ,rotor shaft has a great influence on the dynamic characteristics of high-speed traction motor. This paper uses the UG to establish a simplified model of high-speed traction motor rotor shaft. The modal parameters were calculated and its inherent frequency characteristics were investigated with the analysis software MSC.Nastran. And we also analyze and calculate the foregoing five model shape of high-speed traction motor rotor shaft. These can provide a basis for the optimization design of high-speed traction motor rotor shaft and its dynamics analysis.

In recent years, with the research intensity of machine vision in universities are increased ceaselessly, the achievement in machine vision’ field is gradually applied to all walks of life. This paper mainly discusses how the theory of machine vision applied in the practical measurement, and develops the overall measurement platform. Through the program operating in the computer, finally realizes the control of platform operation. It can collect multiple images; what’s more realize image processing and world coordinate calculation, providing a platform for the future research and application.

Corn residue is used as raw material, and through the study of corn juice processing, we can optimize the machining process, reduce processing costs, increase economic efficiency. It is found through the test that the optimum corn processing time for the precooking is 1h, liquefaction enzyme dosage is 30 activity unit every gram, reaction time is 1.5h, glucoamylase ratio is 120 activity unit every gram, saccharification time is 1.5h, 40MPa homogeneous for two times, sterilization at 135 °C ultra high temperature for 10s. Under these conditions, the production of maize corn residue has high sugar content with a small amount of enzyme dosage, the production cost is reduced, the product stability is greatly enhanced, and the shelf life is effectively extended.

The main material is watkins jujube, and the best conditions of the extract of polysaccharide is considered. The polysaccharide can be obtained from jujube juice by decolourizating, concentrating，alcohol- precipitating and drying. The best conditions of decolourizating are as follows: activity carbon content is 1.0%, temperature is 90°C, the decoloration of two times is 1.5 hours. The best conditions of alcohol-precipitating are using 95% ethanol whose volume fraction is 60%, precipitating by 1 hour, and being dried by freeze drying. The extraction yielding of polysaccharide is 1.2%.

Properties of cured product which polymerizd by nopadiene and factors of curing reaction were researched. Conversion rate of the double bond was characterized and detected by FT-IR analysis, and mechanical properties of cured films were detected, too. Results showed that conversion of double bond increased firstly and then remained basically stable with the increasing of the dosage of initiators, and increased with the increase of irradiation time. Surface drying time become shorter, that is, relative curing speed become faster with the increasing of the dosage of photo-initiators and irradiation intensity, and the decreasing of the lamp distance, and conversion rates of the double bonds were 91.5 % , while illumination time 360 s in dosage of 8 % of Irgacure 6512 to the substrate were used at lamp distance 4.5 cm with 100 % irradiation intensity, respectively. The obtained UV cured coating exhibited some superior properties in flexibility, impact strength, adhesive power, hardness, acid resistance, alkali resistance, salt resistance, water resistance, and so on.

A non-turbocharged, direct-injection single-cylinder 1135 diesel engine was measured to investigate the engine fuel economy and emission characteristics with emulsified fuel that contains 18% water by volume. At the same time, the mechanism of reducing diesel engine NOX formation was discussed. The results showed that the diesel engine fueled with emulsified fuel leads to significant decrease in the emissions of soot and NOx and proper increase in fuel-efficiency without modifications in engine structures comparing with the diesel fuel. This paper analyzed that the water physical chemical role has an effect on reducing emulsified fuel thermal NO and prompt NO formation.

At present, there is no effective online debonding monitoring method for solid rocket motor. In order to solve the problem, the electro-mechanical impedance (EMI) method is introduced into online debonding monitoring for solid rocket motor (SRM). The EMI model of PZT and SRM is developed. The finite element method is employed to analyze the electro-mechanical impedance of the PZT, the conductance curves of PZT are obtained with different damaging phase of SRM, the root-mean-square deviation (RMSD) is used to assess the aging level. The result indicates that EMI as a new detection method is effective in identifying the existence and severity of cracks in SRM. As the debonding area increases, the difference of conductance curves becomes more obvious and the RMSD becomes larger.

The F2 chicken population from China Agricultural University was selected to explore the correlation between single nucleotide polymorphism of fatty acid synthase (FAS) and fatness traits. The primers of FAS gene were designed according to the sequence of chicken fatty acid synthase gene (accession number: J02839). The PCR-SSCP was used for genotype analysis. The results showed that the insertion or deletion of the 41st intron (1418-1424 bp) in chicken FAS gene could result in AA, AB and BB genotypes. In addition, least square analysis revealed that the deletion or mutation insertion of the 41st intron (1418-1424 bp) in FAS gene could affect body weights, abdominal fat weights and abdominal fat ratios of chickens. Therefore, polymorphic loci can be used for marker-assisted selection breeding of chickens.

The rate of gas drainage is lower in mining faces of low permeability of extra-thick seam, and with lots of gas emission, which brings greater security risks. Through the Pre-pumping experiment of deep hole pre-split blasting for 216 mechanized mining face in Xiashijie coal mine of TongChuan coal group, increased the rate of gas drainage over 17% in working surface, that reduced potential safety problems during production, and indicated the direction for later gas government.

To study practical methods about energy-saving and noise reduction of fan,by analysising energy consumption and noise formation mechanism of fan in evaporative condenser. on the basis of the fan structure optimization (large diameter fan equiped width blade, anteversion structure),adopting multi-blowers starting and stopping control independently and Variable frequency fan, Optimum solution of energy-saving and noise reduction of fan was obtained.