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The paper is concerned with changes of acidity and the amount of microorganism in China Northeast sauerkraut fermentationin.It studies the effect of lactic acid bacteria, culture temperature and the concentration of sodium chloride on sauerkraut acidity ,microbial number, vitamin C and nitrite content .Methods of natural traditional fermentation sauerkraut and artificial inoculating lactic acid bacteria fermentation sauerkraut are compared,the results show artificial inoculating fermentation sauerkraut can effectively prevent the growth of harmful bacteria and inhibit formation of carcinogens such as nitrite,avoid some shortcomings in Chinese cabbage natural fermentation process.

0.998[(0.95(K0.5Na0.5)NbO3-0.05LiSbO3]-0.002BiFe1-xCoxO3 (KNN-LS-BF1-xCx, x=0-0.8) piezoelectric ceramics were prepared by solid-state reaction method. The influences of Co content on piezoelectric and ferroelectric properties were investigated. The results reveal that the substitution of Co significantly affects the piezoelectric and ferroelectric properties of KNN-LS-BF1-xCx ceramics. All samples with various Co contents show a pure perovskite structure. With increasing x from 0 to 0.8, the depolarization temperature Td of KNN-LS-BF1-xCx ceramics increase with increasing x, and the piezoelectric constant d33of KNN-LS-BF1-xCx specimen with x=0.2 is larger than those of other KNN-LS-BF1-xCx specimens in the investigated range when the temperature is lower than Td. The remnant polarization Pr decrease with x in the investigated range, but the coercive field Ec increase to 1.78kV/mm with x up to 0.6, and then decrease with further increase of Co contents x.

This paper mainly describes the preparation of carbon nanotubes (CNTs) reinforced BMI/DBA composites, as well as the effects of CNTs contents on mechanical properties of BMI/DBA/CNTs nanocomposites. The results indicated that with the level of hydroxy-modified carbon nanotubes increased, the mechanical properties of the BMI/DBA/CNTs nanocomposites first increase then decrease. When the content of hydroxyl-modified carbon nanotubes was added to 0.75wt%, the mechanical properties of obtained nanocomposites reached the maximum. In addition, the hydroxyl-modified carbon nanotubes were found to be compatible with the polymer matrix effectively.

5-10nmPt-Ag nanoparticles were synthesized by Water thermal reduction, pluronic F127 and tetraethyl Orthosilicate (TEOS) have been used to synthesized mesoporous SiO2template. Pt-Ag nanoparticles have been absorbed onto the surface of mesoporous SiO2. Finally, PtAg/mesoporous SiO2nanocomposites have been modified on the surface of glass carbon electrode to prepared electrochemcial sensor which used to detect 2,4,6-dinitrophenol. In order to optimize experimental conditions, the synergistic reaction, buffer solution has been studied. The result show, when the potential at-0.404V, 2,4,6-dinitrophenol could be determined with a detection limit of 0.163μmol/L and linearity between 0.49-1667μmol/L . This sensor has high sensitivity, good reproducibility and stability.

The effect of the drying temperature on the secondary structure of the soybean protein-isolate/carboxymethyl cellulose/stearic acid composite films was evaluated. The Fourier transform-infrared spectra showed that the stearic acid lose some characteristic absorptions. Hence, the stearic acid was well integrated with the other ingredients. The absorption band (1600~1700 cm-1) of the composite film was deconvoluted into 9 peaks for the calculation of their secondary structure. The β-sheet content of the composite films dried at 90 oC was significant higher than that of the control. Hence, the composite films dried at 90 oC was more stable than the control.

Drying is important for the matrix formation of composite films. A low drying temperature guarantees the compact matrix, while a higher temperature strengthens the crosslinking of ingredients. A balance point of the compact matrix and higher crosslinking degree was the key to enhance the performance of a composite film. The temperature of 30, 60, 90, and 120 oC was used to dry the soybean protein-isolate/carboxymethyl cellulose/stearic acid composite films. When being dried at 90 oC, the tensile strength of the composite films was 2.63 times higher than that of the control, and the water vapor permeability of the composite films was 77.6 % of that of the control. Hence the temperature of 90 oC was the balance point of the composite films.

The thermalgravimetric and differential scanning calorimetry analysis were used to evaluated the state of stearic acid in the soybean protein-isolate/carboxymethyl cellulose composite films. The stearic acid lose its weight rapidly in 210~280 oC, while no significant weight loss presented among 210~280 oC in the profiles of the control and the composite films dried at 90 oC. Hence, the stearic acid was well interacted with the other ingredients. Moreover, the stearic acid was distributed as the free state and bound state in the composite films. The free stearic acid ratio of the composite films dried at 90 oC was the lowest among the tested films. The temperature of 90 oC effectively enhanced the interaction of the SA with the other ingredients.

Using the series connected method, the space silicon solar cell are connected into the solar cell array. Based on the theoretical analysis, output characteristics and I-Vcurve of the solar cell array under condensing and no-condensing light intensity are tested by experimental methods. The results showed that the surface temperature of the solar cell under the essentially same conditions, the energy flux density of the solar cell surface is greater, the greater the maximum output power is. Under the condensing light intensity, the maximum output power is 21.50W.

By using hyper-spectral remote sensing data of desert vegetation, the original spectral data was simply pretreated firstly, then first order differential transform and smoothing was the hyper-spectral data. The spectral characteristics of different grassland types were extracted. The results showed that: desert vegetation has some unique spectral features of common green vegetation. However, affected by the underlying surface of spared leaves, low coverage, the spectrum of desert vegetation does not have obvious green peak, and the red edge characteristics decreased with the decline of vegetation coverage.

In this paper, the dynamic tension of bullet-proof steels processed by hot stamping are tested on MTS810 and Hopkinson bar, in which four types of steels (B1, B2, C1 and C2) are used. For each sample, the flow behavior is predicted via Johnson-Cook (JC), Modified Johnson-Cook (MJC) and Cowper-Symonds (CS) models on the basis of experimental data, respectively, and the calculation method is also introduced. After that, the errors between prediction of each model and experimental data are analyzed and discussed. As a result, the most appropriate constitutive model for dynamic flow behaviors of bullet-proof steel is proposed. Moreover, our in-house software has been developed for calculating, comparing and selecting typical constitutive models for dynamic flow behaviors of materials, which has the functions of parameters input and output, curve plotting and data storing. The work carried out in this paper will be beneficial for accurate simulation of materials deformation.

With the implementation of energy-conservation power generation dispatching, power grid will lose some peak regulation capacity, and changes of load demand characteristic will further increase the difference between peak and valley load of power grid, especially in the Shanghai grid, primarily thermal power units. Its peak regulation capacity will be obviously insufficient, and the problem will become increasingly prominent. This presents a new topic for Shanghai power grid in the power generation market: Under the premise of meeting the customers’ need, how to provide a fair competitive environment that encourage power plants to participate in power peak regulation actively, and then lead the grid to safe, high quality and fairly competitive virtuous cycle.

One-step hydrotreatment of three different vegetable oils have been carried out over Pd loading bi-functional catalyst in batch reactor. Rubber seed oil, Jatropha oil and castor oil have different acid value and constituents, which will influence the hydroprocessing and the quality of products. With temperature rising, several principles have been summarized, and an optimal temperature corresponding to three oils have been determined respectively. At the optimal temperature of Jatropha oil, 300°C, deoxygenation rate was up to 99.29%, C8-16hydrocarbons of products was up to 77.36%; 310°C and 320°C were respectively optimal temperature of rubber seed oil and castor oil, deoxygenation rate were 99.15% and 98.78%, C8-16hydrocarbons were 71.46% and 69.25%. The products quality of Jatropha oil was better than rubber seed oil and castor oil, and rubber seed oil and castor oil can cause the deactivation of catalyst.

The digital oscilloscope adopts STM32 MCU as the control core, uses the IDT7201 for memory, through the AD converter ADS830 real-time sampling achieve the extraction of the input signal and digital storage, display; Crossover functions are realized by CPLD to provide accurate clock for MCU, FIFO, ADS830, and communicate with MCU through SPI agreement. Software design to achieve control A/D converter start-up and storage of the sample data, calculate the frequency and amplitude, buttons and LCD screen.Using Altium Designer software to design and produce a digital oscilloscope printed circuit board PCB, and complete the whole production and commissioning. The digital oscilloscope can be real-time accurate sampling and show the general low frequency signal, can be used when using battery power, small volume, convenient to carry, it can be easily integrated into the experiment box, to become a part of it, and other function modules to form a whole.

Carrying out the generation right trade is an important mean to achieve an orderly resource allocation and improve the power generation compensation benefits between generators. Carbon emissions trade will certainly have an influence on the desire of the generation right trade. Based on the compare of trade price change with and without carbon trade, this paper focuses on the influence of carbon emission trade on the price of generation right trade, providing the basis for establishing the appropriate trade price to achieve coordinating transaction of electric and carbon.

With 3S comprehensive analysis on vegetation and the further development of hyper-spectral technology, the dynamic monitor of large area vegetation in long-term has become the trend. Intelligent process, combined the remote sensing data and field data, constructing dynamic monitoring model, plays an important guilding role in ecological security and balance. By using hyper-spectral remote sensing data of desert vegetation, three groups of spectral characteristic parameters were selected as input data of typical desert vegetation in the research, and vegetation types were selected as output data. Typical vegetation classifier was constructed based on the BP neural network model to study the vegetation classification.

The effects of beeswax, palmitic acid and stearic acid on properties of soybean protein-isolate/carboxymethyl cellulose composite films were compared. The palmitic acid leaded to a higher tensile strength, water vapor barrier and oxygen barrier of composite films than the beeswax and stearic acid. However, the palmitic acid lowered the elongation at break and leaded to a slight yellow. Hence, the palmitic acid was a better option to improve the tensile strength and water vapor barrier of soybean protein-isolate/carboxymethyl cellulose composite films.

In this paper, the high speed tension experiments have been performed on ultra high strength bullet proof steel. The samples were cut from the bullet proof steel plate after hard-module quenching with thickness of 3.7 mm. The mechanical properties at strain rates of 0.001 s-1, 0.01 s-1, 0.1 s-1 and 1 s-1 were carried out on MTS810, while those at higher strain rates of 200 s-1, 500s-1 and 1000s-1 were tested on HTM5020 high speed tension tester and Hopkinson bar. The data from the high-speed tension experiments were fitted via Johnson-Cook constitutive equation, and the fracture surface of each sample was analyzed by SEM. The results indicate that, the shoot-resistance capability of bullet proof steel is closely related to its strength, thickness and flow behaviors under high strain rate. The shoot-resistance will be improved in the case of higher strength and better matching between strength and elongation. The Johnson-Cook equation fitted via experimental data provides fundament to numerical simulation. With the increase of strain rate, the size and depth of dimple trend to decrease and the depth of dimple changes less in steel with lower strength and higher elongation. The SEM analysis of fracture is benefit for further understanding of deformation and fracture mode under high strain rate.

Three lipids (beeswax, palmitic acid and stearic acid) and a hydrophilic film (soybean protein-isolate/carboxymethyl cellulose film) were selected as a model to inspect the relation between the lipid state and barrier properties. The free-lipid ratio of composite films was the best indicator for the transparency rather than the moisture barrier. The free-lipid content/total-lipid content had the highest negative correlation factor with the moisture barrier. Hence, raising free-lipid ratio was effective to improve the moisture barrier of hydrophilic films.

Rice root proteomics research identified to a new remorin1 protein,named OsREM1,which significantly increased (approximately 1.7-fold) compared with control under salt stress by Two-dimensional electrophoresis. It is found that the protein molecular weight is 29 kD, isoelectric point is 4.54. The bioinformatics analysis showed that: (1) The protein contains 195 amino acids, whose theoretical molecular weight is 21.3 kD, whose theoretical isoelectric point is 5.06. There are some differences with the experimental results, which may be the result of post-translational modification, such as glycosylation, phosphorylation; (2) The different crop remorin protein sequence alignment analysis found that the same rate of the amino acids is more than 50%, indicated that remorins are highly conserved protein; (3) Phylogenetic analysis showed OsREM1 had a low sequence identity with potao and tomato REM1, which is the agreement with traditional classification.

Developing bilateral power trade with surrounding regions is not only in favor of improving economic benefit of units in Shanghai grid, but also contributing to the economic development and power distribution safety of Shanghai and surrounding regions. In this paper, considering the situation of indicator control of environmental capacity in key area on power generation enterprises, completion situation of pollution control in generation enterprises, bilateral trade model and evaluation method under the constraints of mandatory environmental indicators are analyzed. Furthermore, solution on achieving clean electricity generation of bilateral trade power in the city of Shanghai is proposed.

Largely used in industry field, bearing is one of the most vulnerable components in an equipment. Owing to the complicated and nonlinear relationship between features and corresponding specific fault, it is less efficient to diagnosis the faults in tradition ways ,especially to deal with the fault of a mega machine. BP neural network whose strength is to solve the nonlinear problems makes it more precise and efficient to determine the fault of bearing. Conjugate gradient algorithm is proposed as the training method of the BP neural network. Compared with standard training method, conjugate gradient has the advantage of training speed and generalization ability, which is confirmed by the results of neural network model whose inputs are common bearing fault samples.

To solve the problem of a type of electronic equipment maintenance, a kind of portable testing instrument is developed. The instrument adopts embedded development, PC104 bus and fault reasoning technology to realize the functions of signal test, fault diagnosis, repair instructions and data query. The instrument is mainly composed of a hand-held chassis, LCD screen, touch screen, Intel main control board, oscilloscope card, multimeter card and power supply module, on the basis of PC104 bus structure. The A/D conversion circuit uses multiple cross parallel high-speed data acquisition architecture to achieve sampling data of higher accuracy and higher speed. The main control board and test function card is designed and the principle of circuit module is described. The signal testing and fault diagnosis software is developed. The instrument has good application effect, with the advantage of practical and portable.

Welding nuts are being used widely in automotive industry as threaded fasteners, its security and reliability requests are increasingly high. Accurate and quick detection results for surface quality can be obtained by using machine vision. Image edge detection by Canny operator has stronger acclimatization in anti-jamming and accurate edge localization. In order to suppress noise in maximum, an improved method is put forward to calculate the gradient of Canny operator, introducing Robert cross gradient in 3×3 neighborhood when calculating the gradient magnitude in finite difference method. The experimental results show that the improved Canny operator makes more effectively on the surface detection of welding nuts.

A three layer BP NN is created to design the cam. The data of cam contour ,which can be measured by CMM, has been used for the training where back propagation method is used.Advantage of solving nonliner problems gives BP netwok the ability to make out a more demand curve of cam. Taking advantage of its learning ability,NN model fits the actual cam contour gradually until the error fulfil the demand.Cam contour is ploted by Matlab,the result of which is better than cubic curve fitting,especially in the aspects of precise and velocity.

Streptomycin (STR) was the bactericidal antibiotic used extensively in human and veterinary medicine with a high aqueous solubility. In this study, the adsorption of STR on soil was studied as a function of pH, cationic types and ionic strength by using adsorption modeling and bath experiments. Adsorption modeling of the adsorption of STR was better fitted with the Freundlich as compared to the Langmuir. The absorbed STR on soil kept relatively constant at pH 3.5-8 and decreased at pH>8. And the order of cationic influence was CaCl2> NaCl≈KCl> the blank sample for STR sorption capacity, suggesting that the sorption of STR increased as the presence of low concentrations of the cationic. The amount of STR adsorbed was inversely proportional to the logarithmic concentration of the background cations.

Anthocyanin mainly responsible for flowers color in many plant species, it also accumulated in response to lots of environmental stress to reduce the damage to plant cell. Anthocyanin synthesis (ANS) protein is an important synthetase participated in anthocyanin biosynthetic pathway. In this study, we isolated the PsANS gene from transcriptome database built by our previous study. The PsANS gene contain an 1050bp open reading frame encoding 349 amino acid, phylogenetic analysis revealed that PsANS was segrated into a group with ANS from others plant species. Secondary and thri-dimension structure prediction also revealed that it may have similar function with ANS in others plant species. The identified PsANS gene would be helpful for further research in flower color modification and resistance breeding.

High penetration of electric vehicles has brought huge impact on the safe and stable operation of power grid. How to effectively improve the comprehensive utilization rate of electric vehicle charging and discharging has become the most important problem for the grid operation. In this paper, we establish the centralized station model which takes the minimal real power loss as its objective and bring variance optimization function. Using IEEE 30-bus system as simulation system, this paper uses genetic algorithm to find the best solution of the above model. The result shows that reasonable arrangement of charge and discharge plans not only smoothes the load curve, but reduces real power loss.

With the rise of micro-grid, renewable energy such as wind and solar power is introduced to the electric power grid, which has the random and intermittent characteristics, thus having great impact on the safety and stability for the electric power grid. This paper deeply analyzes the situation where multiple micro-grids are connected to power grid and establishes a scheme of joint scheduling model for micro-grids and distribution network, which considers network loss, load fluctuation and operation economy. Then a combined bi-level optimization algorithm is introduced to solve this model. The simulation result shows that reasonable scheduling of micro-grid and distribution network not only can smooth the load curve but also reduce network loss and achieve load shifting result.

The properties analyzing of flotation feed sample told that this fine coal sample is high-ash and hard-to-float coal slime. The ash reduction comparison of the step-by-step release flotation test with high intensity conditioning (HIC) or not, and the comparison of flotation test with HIC and adding depressant were made. The results showed that HIC can significantly improve the flotation effect for high-ash and hard-to-float coal slime. Comparing with the traditional step-by-step flotation process, if it meets the demand of ash content is 10.00% and 8.00%, the clean coal yield with HIC will increase 18 and 29 percentage points respectively; comparing with the effect of floatation adding depressant, HIC has more help to reduce the ash content and increase the yield of clean coal. In addition, HIC will save a lot of flotation reagents.

Heat shock proteins (Hsp) were usually regarded as chaperones and play important role in plant stress tolerance. The expression of Hsps would be inducted when plant encounter lots of environmental stressors. Lactuca sativa was an important leaf vegetable in the world, but thermol stress seriously restricted its production. In this study, we isolated the Hsp70 members from Lactuca sativa database, a total of 5 Hsp70 members with completed open reading frame (ORF) were selected and further analysized. Results showed that the 5 LsHsp70 members were closely to Hsp70s in Arabidopsis, which indicated that the identified Hsp70 may responsible for thermotolerance in Lactuca sativa. The 5 new Hsp70s would be used as candidated genes for improving the tolerance trait of Lactuca sativa and others plants.

A novel β-diketone 4-[4-(Dibenzylamino) phenyl]-2,4-dioxobutanoic (DPD) and its corresponding Eu3+ complex with 1,10-phenanthroline were synthesized. The structure, thermal behaviour and fluorescence property of the complex was characterized by Fourier Transform Infrared (FT-IR), thermal gravimetric analysis (TGA) and fluorescence spectrophotometer. The fluorescence characterization shown that the addition of β-diketone and 1,10-phenanthroline enhance the fluorescence intensity of the complex. Eu3+ complex was considered to be a valuable organic light-emitting material with bright red fluorescence because of its strong emission band. Furthermore, the thermal stability characterizarion shows that the obtained rare earth β-diketone complexes have good thermostability.

Effect of grinding fineness and inhibitors on mixed flotation of low copper and nickel were studied and a new nickel inhibitor YS was used in the process of separation of copper and nickel. The results indicated that the high-quality mixed concentrate with the recoveries of Cu and Ni 76% and 65.6% and the grade of Cu and Ni were 4.66% and 4.3%, respectively, was got under the condition of sodium silicate (200 g/t), CMC (200 g/t), copper sulphate200 g/t, amyl xanthate 100 g/t and pine oil 30 g/t with the grinding fineness of-0.074mm80%. Then, Qualified Cu concentrate with the grade26.65% and recovery 55.62%, Qualified Ni concentrate with the grade26.65% and recovery 55.62%, respectively, were got by using the new nickel inhibitor YS in the separation flotation of copper and nickel.

Quantum mechanical calculations have been performed to study the equilibrium among the key intermediates (iminium ion, oxazolidione, and enamine) in the proline-catalyzed reactions under base-free and base-present conditions. The results confirmed that the tautomeric equilibrium among these species can be tuned by the basic additives. The computations satisfactorily rationalized the experimental observations and provide a clue on how to stabilize the enamine intermediates.

To realize starting operation and reduce position estimation error of switched reluctance motor (SRM) without position sensor, a novel control method based on pulse injection, divided angle section and variable threshold is presented. The starting operation of SRM can be accomplished by injecting high frequency pulse and judging position sectors. Variable threshold is used to reduce position estimation error. The value of threshold is obtained by looking up table prestored in controller. The method avoids complicated mathematical model and is suitable for starting operation with two phases. Besides, rotor position estimation error of this method is analyzed and the method which can decreased the error is proposed. At last, the experiment has been done to verify the performance of the control method.

In this paper, we first describe the characteristics of cloud computing technical, then analysis the difficulties and challenges of digital archives in cloud computing era.And on this basis we constructe archives personalized information service system model based on cloud computing, and at last we described cloud platforms personalized services mode workflow.

The development of network technology to integrate network health information resources, regulate commerce, associations and other web services and form a diversified public health network information services has a significant meaning for public health network information guidance. This paper proposed the concept of public health information resources service system based on the cloud computing technology and described the location of public health information resources cloud services and cloud deployment model. And we also build an overall framework of information resource cloud service system in which the characteristics and processes of information resource layer, service layer, user layer and evaluation layer were designed.

The traditional hydraulic shock absorber suspension converts the vibration energy between the sprung mass and unsprung mass into heat energy. The realization of vibration energy recycling can reduce vehicle's energy consumption, developing ideals for the research of the active suspension/ semi-active suspension. Four kinds of energy reclaiming suspension's structure principle is introduced in detail and the development restricting factors of the suspension at present are worked out through the unified measure, indicating the technology breakthrough points.

Bell-LaPadula model (BLP) model is the most classical multilevel computer security model. Based on the research of BLP model, this paper analyzes the main defects in BLP model and different improving methods, puts forward a principle or “read the nearest and write the nearest”, improves the BLP model more effective security and integrity.

This paper mainly describes the changes of properties of low density polyethylene and polypropylene after multiple processing. Melt flow index (MFI) analysis, thermal gravimetric analysis (TGA) ,differential scanning calorimeter (DSC) and mechanical properties measurements were used to characterize the thermal stabilities, processability, mechanical properties of virgin and recycled PE and PP. The results indicated that MFI of PE decreased with increasing the number of processing cycles whereas the opposite trend applies to PP. The thermal degradation temperature of the 6th extrudates decreased slightly in comparison with virgin ones. An amorphous region of recycled PE was observed by DSC. The mechanical properties of extruded materials were also affected due to the thermal mechanical degradation.

According to the communication equipment fault characteristics of complexity, hierarchy, relevance, delay and uncertainty, the method of extracting diagnosis rules based on rough set is presented in order to obtain diagnostic decision rules with good adaptability and maximum matching capabilities. This method can process a large amount of fault data and it can reduce both attribute and attribute value.4 evaluations are selected to evaluate the effectiveness and reasonableness of decision rules, and finally core value table of decision rules which has a certain ability to adapt. Example shows that this method can remove noise in fault diagnosis sample, reduce the computation and improve the efficiency of diagnosis effectively.

Using Visual Basic as the development platform, the agricultural products traceability code system was constructed based on the PDF417 two-dimensional bar code technology through the embedded c++ dynamic link library (DLL) in the paper. The system implemented the expression of the related information for agricultural products origin, agricultural products, certification types, agricultural products processing enterprises, production date, shelf life of agricultural products and so on. Through the effective traceability of agricultural products, the requirements of the consumers to agricultural product quality were satisfied by the system.

This paper has analyzed safety problem and vulnerability of wireless network. And it has made deeply research about variety and drawback of wireless network security model. It has put forward a novel general security model.

This paper is aiming at establishing a commonality fitness service system, which can support national fitness service, rapidly make reflection and satisfy mass information storage and treatment. It can offer common service platform combined resource with space for the public.

Moisture severely affects aerospace structures and offshore platforms during their service life span. It deteriorates the mechanical performance of polymeric composites through long term and cyclic hygrothermal ageing. This reduction in mechanical performance must be considered during product design to ensure long-term structure endurance. In order to decide the long-term moisture effects on composite components, they are exposed to a rapid moisture conditioning. Presently the available qualified methodologies allowing only simple geometry and an assumption that diffusivity rates are independent of the flow path or direction. Therefore a more advanced finite element method is required. In this research work the finite-element analysis was performed to study the moisture diffusion in unidirectional composites. The final goal for this study was to determine the exposure time for rapid moisture conditioning that produces the most accurate moisture distribution in composite laminates.

Database is the foundation of making IETM, database structure has great influence to the TETM production method and use efficiency. Aiming at the defects when using relational database to process XML documents, According to the characteristics of IETM data module and information objects under S1000D standard, native XML database needed to meeting the conditions were analyzed, using a native XML database technology to structure IETM data Module and information set; and giving data module code, information objects, information control composition structure codes of the data module structure, gives the design method of IETM database storage and index model, which can effectively avoid the traditional the deficiency of IETM database support for XML technology.

Text clustering is a popular research topic in the field of text mining, and now there are a lot of text clustering methods catering to different application requirements. Currently, Weibo data acquisition is through the API provided by big microblogging platforms. In this essay, we will discuss the algorithm of extracting popular topics posted by Weibo users by text clustering after massive data collection. Due to the fact that traditional text analysis may not be applicable to short texts used in Weibo, text clustering shall be carried out through combining multiple posts into long texts, based on their features (forwards, comments and followers, etc.). Either frequency-based or density-based short text clustering can deliver in most cases. The former is applicable to find hot topics from large Weibo short texts, and the latter is applicable to find abnormal contents. Both the two methods use semantic information to improve the accuracy of clustering. Besides, they improve the performance of clustering through the parallelism.

According to the pharmacy filling technical requirements of controlled fire extinguishers of self-propelled artillery, a "time-controlled continuous filling" filling method was proposed, problem of the extinguishing agent mixed with the air filled with ice clogging pipes media is solved, and two extinguishing agent pressurized filling and optimal timing nitrided cast/cutting process control are implemented. After the trial, controllable fire extinguishers filled with equipment with comprehensive, secure, reliable, good stability, can greatly reduce the cost of equipment maintenance.

We conducted a numerical simulation of oxygen concentration in goaf using Comsol4.3b when the air volume in working face ranges from 500 m3/min to 900m3/min. The result show that with the air volume increasing the oxygen concentration boundary of 18% move to deep goaf in a small scale, while the boundary of 8% move to deep goaf in a large scale and show an exponential relationship, in other words air volume change greatly affect the 8% boundary. The boundary of maximum air leakage and air leakage 0.004% all display an exponential relationship with air volume. But the movement scale of air leakage boundary 0.004% is small. The width of oxidation zone increases obviously with air volume increasing and the relations formula is Lmax= 100.4ln (Q)-25.55ln (Q)-410.4. Draw a conclusion that in ventilation management air volume should be reduced appropriately in order to reduce the width of oxidation zone and slow the speed of moving to deep goaf, thus control spontaneous combustion in goaf.

In order to solve the problem of the routine signal measuring apparatus applied in a certain type of electronic equipment , a wireless signal testing system based on bluetooth technology and LabVIEW is proposed and designed. The hardware and software structure of the system is demonstrated. The key principle of data acquisition, wireless transmission, data processing and display are described. The wireless signal testing system is successfully applied with the advantage of high accuracy, real-time and portable.

Energy control of HEV plays a very important role in the process of HEV design, which is directly related to the safety and feasibility. Considering the drive system of HEV is nonlinear and complex, a fuzzy control strategy which is combined with particle swarm optimization algorithm is designed to realize the energy control of HEV. Fuzzy control strategy does not need to built accuracy mathematics model and has good robustness, but it mostly depends on engineering experience and has poor ability of self-learning. So particle swarm optimization algorithm has been added to solve these disadvantages of fuzzy control strategy. In conclusion, this method can not only keep the advantage of fuzzy control strategy, but also has ability of self-learning and self-adapt because of particle swarm optimization added. And the simulation proves that this method is feasible and effective.