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Currently, researchers have indicated that inorganic minerals in reservoirs, such as clay minerals, carbonates and quartz, can catalyze the evolution of organic matter into oil and gas. Therefore it is reasonable to believe that the minerals in reservoirs may act as a catalyst support with the metal-containing catalyst added from outside during the thermal recovery of heavy oil. This paper studied the aquathermolysis of heavy oil catalyzed by minerals and transition metal. The reaction conditions of two heavy oil samples were investigated. The results show that the optimal reaction conditions of heavy oil from Xinjiang Baikouquan Oilfield (XBO) are the reaction temperature of 250 °C and the reaction time of 6 h; for the crude oil from Xinjiang Tahe Oilfield (XTO), the optimal reaction conditions are determined to be the reaction temperature of 250 °C and the reaction time of 12 h, the water–oil ratio of the two oils is 0.3. Under optimal conditions, viscosity and pour point of heavy oil are significantly reduced. Differential scanning calorimetry (DSC), GC-MS analysis, thermogravimetric analysis (TGA), and elemental analysis were used to study the properties of the two heavy oil samples before and after reaction to explore the mechanism of the catalyzed aquathermolysis of heavy oil. This work will benefit the related heavy oil recovery work in this field.

Copyright of Synergies Chine is the property of GERFLINT (Groupe d'Etudes et de Recherches pour le Francais Langue Internationale) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Synergies Chine is the property of GERFLINT (Groupe d'Etudes et de Recherches pour le Francais Langue Internationale) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In speech recognition and natural language processing of doctor-patient voice communication, it is critical to distinguish what comes from the healthcare worker and what comes from the patient. In addition, speech contains acoustic and linguistic features that can be identified by machine learning models to measure the speaker's behavioral health. At the same time, it is relatively simple and attractive for patients to use voice data acquisition, as well as relatively cheap and convenient, requiring only a microphone, a quiet place and a device to collect audio samples. Thus, voice-based biomarkers can prescreen for disease, monitor disease progression and response to treatment, and be useful alternative markers for clinical studies with informed consent, but the premise of this process again requires us to distinguish between doctors and patients when taking audio samples. For audio samples of patient voices, in practice, most of the doctor's and patient's voices are not taken separately, but are mixed together. Several speaker recording methods have been used to isolate sound in the time domain; However, these studies do not address how to obtain timelabel-based speech samples, nor how to identify speakers. In this paper, a speech separation method is proposed for the audio separation situation between a doctor and several patients. The method mainly includes three parts: voiceprint segmentation clustering, cutting and splicing, speech identity determination. Doctor and patient audio can be separated while respecting the privacy of the conversation content, and can be stored separately based on the identity of the voice.

The large-scale promotion of electric vehicles is China’s strategic measure to alleviate the energy crisis, deal with climate change and promote green development. Taking 19 large and medium-sized cities in China as samples, this thesis constructs a quantitative model of policy subsidies and a gray correlation model to evaluate the subsidies of the main demand-side policies of electric vehicles and their impact on the demand for electric vehicles. The study found that the subsidy intensity (varies from 34,000 to 129,000 yuan per year) of the “direct” policy is stronger than that of the “indirect” policy (ranges from 5,000-104,000 yuan per year). The subsidy intensity of the “indirect” policy varies greatly among cities. Thanks to the convenience of the use link, the gray correlations between the intensity of the “direct” and “indirect” policies and the promotion of electric vehicles are 0.61 and 0.92, respectively, indicating that the influence of the “indirect” policy on consumer behaviour is greater than that of the “direct” policy significantly. Based on the research conclusions, in order to further expand the electric vehicle market, this thesis intends to put forward relevant policy suggestions.

This article is an introduction to the practices of sponge projects for airports in China. The objective of this paper is to point out the main problems existing in the construction of sponge airports and seek ways to improve the storage volume of airports. Data investigation, technical analysis, and engineering cases are used to conduct the research. The result shows that the main problem in the construction of sponge airport is the lack of effective sponge measures in the airfield area. Addressing the challenges and implementing effective sponge measures in airfield area is feasible and crucial for advancing sponge city concepts in airport construction. The elevation of pavement, particularly in creating sponge storage in unpaved areas, and using a drainage layer for the pavement and the shoulder stands out as a successful approach and should be considered in the design of airfield area projects.

At present, with the continuous advancement of urban development, an increasing number of regional overall development projects utilize the planning implementation platform to carry out design control and construction throughout the full life cycle of the project. However, the lack of relevant standards and research leads to some problems in practical projects, such as the unchanged thinking mode of planning management and control, and the lack of unified standards for the preparation of technical documents like the regional master plan and management manual of the planning implementation platform. To this end, this paper will focus on the content and composition of the management manual, clarify its construction logic and content, construct a factor library for this manual, provide references for the application of related projects, and promote the orderly development of project construction and development.

This study investigates the integrated application of cloud computing and big data in the field of education and its impact on curriculum teaching. Through a comprehensive review of the fundamental principles, current applications, and relevant literature, the study reveals the advantages and challenges of cloud computing and big data in aspects such as curriculum design, learning analytic, and personalized teaching. It also explores their influence on aspects like the sharing of teaching resources, the construction of online learning environments, and the evaluation of student learning outcomes. Furthermore, through case analysis and empirical studies, this paper provides a more in-depth validation of the practical effects of cloud computing and big data in improving teaching effectiveness, promoting educational innovation, and cultivating students’ information literacy. In summary, the integration of cloud computing and big data provides new perspectives and solutions for building smart education, while also laying a solid foundation for nurturing talents capable of meeting the demands of future society.

Regarding the optimization and management of energy in photovoltaic charging stations, existing research mostly focuses on the power grid, with little consideration given to its characteristics as a producer and consumer. This paper proposes an optimized scheduling strategy for photovoltaic charging stations that considers transactive energy mechanisms. Firstly, under the premise of ensuring the safe operation constraints of the distribution network, a distributed transaction model for photovoltaic charging stations was established. Secondly, the optimization model is solved using the Lagrangian decomposition principle and Subgradient method to obtain the scheduling plan of the photovoltaic charging station. The simulation results indicate that the scheduling strategy proposed in this article can promote the on-site consumption of renewable energy and improve the economy of photovoltaic charging stations.

The industrial methane steam reforming reaction usually employs particulate catalyst that are easy to prepare and cost-effective, but suffer from problems such as high reactor pressure drop and low overall catalyst utilization. In this study, the Ni-Al2CaO4 powder prepared by the equal volume impregnation method was subjected to particle size control using a pressing method, and was made into catalyst particles of different sizes. Some of the catalysts were filled into honeycomb structures with cordierite and metal substrates, respectively, to prepare regular channel packing catalysts. The differences in methane steam reforming conversion rate, H2/CO selectivity, and overall pressure drop among the three catalysts were compared, and the influence of particle size and regular channel on reaction performance was systematically explored. The results showed that under the same conditions, as the catalyst particle size increased, the methane conversion rate and pressure drop increased. The regular channel packing catalysts with the two substrates showed similar pressure drop levels, but the metal substrate exhibited a higher methane conversion rate due to its excellent thermal conductivity. Compared with single-particle catalysts of the same size, the pressure drop of the metal substrate regular channel packing catalysts was reduced by more than 25%. Under the conditions of a gas hourly space velocity of 2000 h-1, a reaction temperature of 700 °C, and a water-to-carbon ratio of 3, the 40-60 mesh metal substrate regular packing catalysts showed a 7% increase in methane conversion rate, reaching 95.2%.

This paper studies the corresponding performance optimization of unit coordinated control system. Combined with the actual operation of the unit, targeted optimization strategies are formulated and implemented for the main parameters such as active power, main steam pressure, feed water flow, main steam temperature and furnace pressure. After long-term tracking of operation and repeated adjustment of relevant control parameters, a more reasonable optimization effect is finally obtained, and the regulation performance of the unit coordinated control system meets the AGC input conditions.

The small hydropower stations have reached a new balance after years of operation. The ecological balance of the river would been broken by the dam removal and the reservoir area above the dam would disappear. Consequently, a series of changes occurred in water depth, velocity of flow, the concentration of organic and inorganic nutrients, distribution and form of organic matter, aquatic organism, etc. It is unclear what would happen for the hydrodynamic conditions, sediment characteristics and aquatic organism community structure of the reservoir area and the lower reaches after the dam removal. Therefore, it is urgent to study the impact of dam removal on the transportation and redistribution of organic debris and the potential ecological effects with benthos as indicators in the river where the small hydropower station is located.

The study on the problem of hydration and dispersion expansion of shale and the poor high temperature resistance and lubrication performance of mud with soil is carried out. The selection of viscosity enhancer, filter loss reducing agent, lubricant and inhibitor in solid-state drilling fluid was carried out through experiments. The formula of solid-free drilling fluid was 0.2% 1831+1% xanthan gum+1% phenolic resin and 1% sodium benzenesulfonate. The linear expansion rate of bentonite is less than 20%, which shows that the formulation has good inhibition performance. The mud ball in the drilling fluid after 48 h of storage did not undergo hydration expansion, which indicated that the formulation had strong inhibition on the hydration expansion of clay. Finally, after heating the formula in a roller heating furnace at 120 °C for 16 h, the plastic viscosity, dynamic shear force and apparent viscosity of the formula were determined as 14.00 mPa·s, 24.00 Pa and 39.50 mPa·s respectively, while FL (filtration loss) was 17 mL. In conclusion, the strong inhibition solid-phase drilling fluid formula is superior in both the inhibition of hydration expansion and the high temperature resistance of clay.

Total organic carbon (TOC) can reflect the total amount of organic matter in water. This paper introduces the common methods of measuring organic carbon, including high temperature combustion method, potassium persulfate oxidation method, spectrometry, ozone oxidation chemiluminescence method, supercritical water oxidation method and so on. At present, high temperature combustion method is the most widely used method for TOC measurement in seawater, because of its high oxidation efficiency. TOC sensor needs to be developed to realize in-situ and long-term monitoring.

With the application of hydrogen energy in the world, photovoltaic hydrogen producton industry has been ignited rapidly. Many Chinese governments and companies are producing hydrogen, often called "green hydrogen", from renewable sources. Japan, Germany. The Netherlands, Australia, Canada and other countries have carried out research or investment in large-scale photovoltaic hydrogen production projects. This article takes the hydrogen energy planning of Chengdu, Sichuan Province as the lead, and combines the actual conditions of the Ganzi region to discuss the feasibility of using photovoltaic power generation to produce hydrogen to support the development of the hydrogen energy industry in Chengdu under the conditions of abundant photovoltaic resources and no transmission.

Based on the control principle and flow distribution characteristics of the electro-hydraulic proportional load-sensitive multiway valve in an excavator, a system simulation model is established in AMEsim. After proving the accuracy of this model by comparing simulation results with theoretical results for various flow distribution characteristics under saturated and unsaturated conditions, this model is used to study the effect of three-way valve preload on the multiway valve system to prove that the simulation method can evaluate the influence of design parameters on the multiway valve system and then guide the design of multiway valves.

Overhead transmission lines are important carriers of electric energy transmission. Their icing, galloping and shedding in winter and spring seriously threatened the safe operation of Shanxi power grid. Especially in the recent years, compact lines and double circuit lines on the same tower, typical types of overhead transmission lines in Shanxi Power Grid, were affected by frequent trips induced by icing, galloping, and shedding appeared in their conductors repeatedly, which seriously reduced the capacity of power energy transmission in Shanxi and caused trillions of power load losses. Through detailed investigation and analysis of the characteristics and historical fault cases of compact lines and double circuit lines on the same tower in Shanxi Power Grid, the key causes and main laws of two types of lines in Shanxi Power Grid are clarified, which could provide support for the follow-up line anti-ice technical transformation and capacity improvement.

Based on the high-pile and high-pier bridge of Qianhuang Expressway, eigenvalue buckling analysis is carried out by establishing three-dimensional finite element models of three different bridge types and high-pier types, and the corresponding structural nonlinear buckling loads under different initial pier deviations are calculated. The calculation results show that the nonlinear buckling loads of three high-pier types are less than elastic buckling loads. The stability of column high-pile and high-pier of continuous bridge is better than that of simple supported bridge, and the stability of plate high-pier is better than that of other two high-piers. In addition, the corresponding buckling load decreases with the increase of the initial horizontal displacement, indicating that the pier top offset of the high-pile and high-pier bridge is not conducive to the stability of the structure.

The excessive longitudinal horizontal displacement of pier top has become one of the common defects of high-pier bridge, which seriously affects the safety of the bridge structure. In order to determine the influencing factors of the horizontal displacement of the pier top of high-pile and high-pier bridges, this paper establishes the finite element model of the whole bridge based on the high-pile and high-pier bridge of the Qianhuang Expressway, and considers the influence of dead load, vehicle load, vehicle braking force, temperature load, bearing friction coefficient, and bearing under eccentric compression on the horizontal displacement of the pier top. By comparing and analyzing the law of various factors influence on the horizontal displacement of the pier top, the main causes of the horizontal displacement of the pier top of high-pile and high-pier bridges are summarized, which can provide reference for the analysis of pier top deviation of similar high-pile and high-pier bridges.

In order to broaden the application range, PEEK has been modified by 1064nm-wavelength pulse laser, then deposited with Ni-P alloys by electroless plating. The properties of metal layers on PEEK were characterized by SEM, resistance tester and metallographic microscope, respectively. When the laser energy density is relatively low (Q10J·cm-2), of which the surface resistance of the coating is less than 20 mΩ. In this paper, the interaction mechanism of the pulse laser on PEEK has been studied and the metals on the PEEK have been prepared under the laser-induced effect, which provides technical support for the future application of PEEK in aviation with aerospace fields, such as, radar and antenna.

The underground pipeline of campus is an extremely complex and huge system, and the traditional pipeline management mode can no longer meet the requirements of campus development and planning. The 3D geographic information visualization method can accurately describe the location and distribution information of various pipelines and spatial features, which can better serve the management of underground pipelines on campus. This paper designed overall framework and technology framework of underground pipeline information system, the system is satisfied with the PC, Web, mobile terminal and other multi-client access. In this paper, the key technology points of underground pipeline system construction on campus are comprehensively analyzed, and the feasibility of the technology is verified by combining with the practical application of underground pipeline system in lanzhou university.

Acetic acid fermentation is an essential step in producing high-quality vinegar. In this study, the alcoholic medium was used as a seed broth for acetic fermentation using Acetobacter aceti as the inoculum for approximately 7 days at 32℃ to obtain 45.87g/L acetic acid. During the Acetic acid fermentation stage, the content of the total polyphenols decreased first and then increased. Based on amino acid analyzer analysis, pineapple vinegar contains 18 kinds of free amino acids. And the contents of sweet and umami free amino acids are the main free amino acids, followed by bitter amino acids.

An analytical program based on the headspace solid phase microextraction (HS-SPME) method combined with gas chromatography–mass spectrometry (GC-MS) was developed to extract and analysis profiling of volatiles from pineapple peel wine. In total, 57 volatile compounds were detected on the basis of the MS information and RI, including 25 esters, 9 alcohols, 8 acids, 7 phenolic compounds, 6 aldehydes and ketones,1 terpene and 1 lactone, respectively. The types of esters are the most in various aroma substances, and the content of alcohols is the largest. Phenethyl alcohol, 3-methyl-1-butano, 2-methyl-1- butano, 2,3-Butanediol and 2-Methoxy-4-vinylphenol were the major constituents.

Under the perspective of powerful industrial city strategy and based on the creative product design in Bengbu University, this paper constructs a service mode that is compatible with the creative product design in Bengbu University by combing the product design service theory according to Bengbu University’s positioning in application-oriented university.By strengthening the supply of design service and adopting the combination of multiple innovative measures of regional culture, university-enterprise cooperation, studio and craftsmanship spirit, etc., it strives to enhance student’s professional practice ability comprehensively, to promote enterprise’s research and innovation level. It is aimed to cultivate high-quality practical talents that are suitable for supporting the development of powerful industrial. It also provides referential theoretical basis and reference for the related researches on product design service.

The use of pultruded glass fibre reinforced polymer has gained wide acceptance in civil engineering due to their excellent physical and mechanical characteristics, like low weight, high strength and durability in harsh environment. However, duo to the pultrusion process, pultruded GFRP sections are orthotropic and face a critical issuse of web crippling. This paper presents an experimental study on the web crippling behavior of pultruded GFRP channel sections under transverse bearing load. A total of twenty specimens were tested under two loading conditions, namely end-two-flanges (ETF) and interior-two-flanges (ITF). Five different bearing plates with length ranging from 20 mm to 200 mm were chosen to apply the transverse concentrated loading. It is observed taht all specimens initially cracked at the web-falnge junction. The experimental result also confirmed that both the web crippling capacities and stiffness increased with the increase of the bearing length. And the web crippling capacities are improved when the bearing plates are moved from the end to the middle of the specimen. The strain distributions at the web-flange junction obtained by DIC indicated that both the materials underneath the bearing plates and that near the bearing plates engaged in carrying the transverse bearing load.

This paper studies the network structure of geographical indication agricultural products in the field of e-commerce in Sichuan Province, and discusses the joint mechanism of geographical indication brands based on network structure. Taking the geographical indication products as the node, the consumer’s purchase behavior is the connection relationship, and the network structure of the geographical indication products is analyzed from the perspective of consumer behavior, and then the regional brand creation is based on this.This paper constructed a product——product network——brand alliance——regional brand geographical indication agricultural product regional brand creation path. The paper focuses on the resource dependent brand joint behavior based on individual interests, and the joint behavior of geographically dependent brands based on the perspective of regional interests. When the brand joint starting point is based on individual interests, it will tend to choose resource-based agricultural product brands that have strong commodity-related strength and can bring the greatest consumer transformation to themselves; when the brand joint starting point is to promote the regional-based regional economy, it will tend to start from the cluster-based brand alliance, emphasizing the development of a good geographical indication agricultural product brand to promote the development of a geographically-improved GI brand.

The magnetic bearing-rotor system is subject to various external disturbances in practical application. Under certain control conditions, the random response characteristics of the magnetic bearing-rotor system are a particular concern. This paper analyzes the response characteristics of base of the magnetic bearing subjected to acceleration random excitation in the horizontal direction. First, the magnetic bearing-rotor system model is deduced. Then, the random response of the rotor under acceleration random excitation is derived. The probability of the collision of the rotor between the auxiliary bearing is calculated and the example is given. The paper conclusion provides a theoretical basis for the collision detection and prediction of the magnetic bearing-rotor system.

The treatment, disposal and management of municipal solid waste strongly depend on the composition and characteristics of municipal solid waste. The Physical composition of MSW and its influencing factors were investigated and analyzed in the residential of Beijing area. The result showed that the composition of MSW in four seasons was similar, and the kitchen was the main composition of MSW, accounting for 69-74% of the total amount of MSW. The average age of families, educational backgrounds, family income and building area have a great influence on the physical proportion of MSW. As the average age of the family increases, the proportion of other wastes was gradually reduced, the proportion of the harmful waste was increased. With the increase of educational backgrounds and family income, the content of kitchen waste decreased, while the content of recyclable waste increased obviously. The 50 square meters was used as a dividing point for the residential area of the family, the kitchen waste decreased at first and then increased, while the proportion of disposable packaging and other waste increases at first and then decreases with the increase of building area.

We reviewed the current key techniques of portable mass spectrometer and discussed its application in environmental monitoring. At present, mass spectrometer has two development directions. One direction is high-throughputs, high-sensitivity and high-resolution laboratory mass spectrometer. The other is small, in-situ monitoring portable mass spectrometer. With the rapid development of electronic technology and new materials, portable mass spectrometers are widely used in environmental pollution monitoring because they have the advantages of small size, light weight and low power consumption.

How to select and combine many services with similar functions reasonably and efficiently to provide users with better service is the main challenge in the service composition problem. This is thorny when the number of the candidate Services is huge. Recently, researches transform the service compositions problem as a multi-objective optimizing task, and then the genetic algorithm is commonly used to tackle this issue. However, the fixed crossover probability and mutation probability settings in genetic algorithm usually result to it falls into a local optimal. To improve the performance of the genetic algorithm in the service composition task, this paper proposes an adaptive parameter adjust strategy, which can adjust the crossover probability and mutation probability automatically. The experiment result shows our method has greatly improved the maximum fitness of the final solutions of traditional genetic algorithm.

In this paper, the ultrasonic thickness gauge by the pulse-reflective principle of the steel pipe, the thickness of steel plate, glass and glass were measured and analyzed, and other factors in thickness measurement had certain influence on the thickness measured: coupling agent, surface condition, temperature and so on.

The method of repeated trial and proofreading is generally used to the convention reducer design, but these methods is low efficiency and the size of the reducer is often large. Aiming the problems, this paper presents an adaptive particle swarm optimization algorithm with foraging behavior, in this method, the bacterial foraging process is introduced into the adaptive particle swarm optimization algorithm, which can provide the function of particle chemotaxis, swarming, reproduction, elimination and dispersal, to improve the ability of local search and avoid premature behavior. By test verification through typical function and the application of the optimization design in the structure of the reducer with discrete and continuous variables, the results are shown that the new algorithm has the advantages of good reliability, strong searching ability and high accuracy. It can be used in engineering design, and has a strong applicability.

In a small stream line under the big trend, this paper gives a brief introduction to using software such as “kuaishou” to shooting a small video. This research concerns several parts: introduction, the writing of the script, the selection of actor, props, post-production and innovation. A small video is been made of five steps, based on this, it is been detailed on each piece of analysis to better complete the video. The purpose of this study is to show the methods mentioned above are promising. In this Internet age, this kind of video with one of the biggest bright spots, that is its powerful ability to turn into cash. The developed technique is applied to shooting videos for making money.

Taking the bridge widening project of Shanghai-Hangzhou-Ningbo expressway widening construction project (China) as the background in this paper, the variation law of the internal force of the old bridge in the widening hollow slab girder bridge under vehicle load is studied, which is under the condition of different span lengths and different widening widths. Three different span lengths of the pre-tensioned prestressed hollow slab girder bridges are selected, the spatial finite element models of both the old bridge and the whole structure of widening bridge are established and calculated respectively by Midas/Civil software. The influences of widening and load increasing on the old bridges under the vehicle load are compared and analyzed. In addition, the authors also analyze the influences of different widening widths on the force state of old bridges under the condition of widening the same number of lane. Moreover , the effects on the old bridges that are caused by the uneven foundation settlement of widening bridge structure are also studied in this paper. This paper can provide some references for widening design of hollow slab bridges.

Modern enterprise management strives to become effective and pragmatic, usually, KPI is the most essential key indicator for the enterprise examination department. However, because the supporting and bearing roles of KPI for different departments are different, no a rather scientific quantification for the weight between them is available, unbalanced examination weights between indicators and departments usually exists. Here, it is with balanced score card to breakdown enterprise’s key tasks, card the performance indicators supporting enterprise’s key tasks, and utilize AHP and QFD method to dynamically establish a standard for measuring each department’s indicators so as to provide a basis for enterprise’s scientific examination.

China free trade zone is an important carrier of the Belt and Road to achieve the internal and external linkage. There are four free trade zones in china. They are in Shanghai, Guangdong, Tianjin and Fujian. Fujian free trade zone supplies greater openness and favorable policies for Xiamen international shipping center, and dispenses with the formalities, reduces shipping costs, and realizes the territory of the commissioner of policies. So it will be in favor of FDI and benefited for employment-generating. It will boost the economy and increase international trade. Firstly this paper found out the influence factors of Fujian free trade zone to Xiamen international shipping center through the investigation. Then index system of these influencing factors was designed. And then the index system was designed into a questionnaire. Relevant experts filled the questionnaire. Then the main influence factors and secondary influence factors were been found. The weights of each index were got by using the method of analytic hierarchy. At last, development strategies of Xiamen international shipping center were been proposed.

A method combined curvature mode difference and wavelet transformation was used to determine the damage location of space gird structure. This method considered the curvature mode difference of pre and post damage as the wavelet transform analysis signal. Moreover, these signals were analyzed by wavelet transform using wavelet function db3. As the wavelet transform coefficient occur sudden change, the damage locations of links will be obtained. In this paper, square pyramid space grid structure, orthogonal space truss structure, three way latticed grid and honeycomb triangular pyramid grid structure will be analyzed using this method to identify single damage and multi-damage location. The solutions from numerical simulations show that this method can take effective identification of single damage location and multi-damage location of square pyramid space grid structure by the first mode condition. And this method has versatility to detect damages from different space grid structures.

This paper analysis the common fault types of primary Electrical Power Steering system, meanwhile classify every fault. It provides the basis for further troubleshooting and maintenance. At the same time this paper propose a practical working principle of fault-tolerant, in order to make the EPS system more security and durability.

Based on the perturbation formulae of the spin Hamiltonian parameters (SHPs), i,e,. g factors gx, gy, gz, and hyperfine structure constants Ax, Ay, Az, for a 3d7 ion in rhombically distorted octahedra, the defect structure and the experimental EPR spectra are theoretically investigated for the rhombic Co2+ centre in ZnWO4. Due to the Jahn-Teller effect, the impurity ion Co2+ on host Zn2+ site is found to undergo the local rhombic elongation distortion, characterized by the axial elongation ΔZ (≈ 0.157 Å) of the impurity-ligand bonds and the perpendicular distortion angle Δф (≈ 3.5°) related to an ideal octahedron. Compared with host Zn2+ site in ZnWO4, the Co2+ centre exhibits a more regular oxygen octahedron. All the calculated SHPs show good agreement with the observed values. The present work may be helpful to understand the local structures and properties of metal tungstate with transition-metal dopants.

Based on the properties of active magnetic bearing, the electromagnetic parameters and structure parameters are analyzed, parametric design method is introduced to study the structure of active magnetic bearing. Through a program personalization process that is in accordance with active magnetic bearing is established. Personalization process aims to build the parametric model of active magnetic bearings and component library by use of CATIA secondary development. Component library is to build assembly model for a multiple degree of freedom magnetic bearing system. Parametric design is a method that provides the direction for its structural design.

In order to study the development process of hydrogen combustion in a closed vessel, an on-line chemical equilibrium calculator and a numerical simulation method would be used to analysis the combustion pressure and flame front of mixed gas, which based on 20L H2/air explosion experiments in spherical vessel (Crowl and Jo,2009). The results showed that, the turbulent model could reflect the process of combustion, and the error of combustion pressure by simulation is smaller than the Chemical Equilibrium Calculation. The heat loss and incomplete combustion are the main reason to cause the error.

The g factors and superhyperfine parameters of the tetragonal [Fe(CN)4·(CN)Cl]5 group in NaCl are theoretically investigated from the perturbation formulas of these parameters for a tetragonally elongated octahedral low spin (S=1/2) 3d7 cluster. This center is ascribed to the substitutional Fe+ on host Na+ site associated with one of the axial ligands CN– replaced by Cl–. Since the crystal-fields arising from the axial Cl– and CN– ions are weaker than those of the four planar CN–, the impurity center is characterized as the tetragonally elongated octahedron. The calculated g factors and superhyperfine parameters show reasonable agreement with the measured values. The results are discussed.

Mechanical deformation of mechanical transmission part in hydraulic control system directly affects the loading accuracy of the system. For improving the mechanical properties of the system, The force analysis and motion analysis of mechanism are simulated based on the four-bar linkage structure (FLS), and kinematics simulation is designed by using Matlab program, then came to a system error bar graph. The system error was calculated accurately according to the results of the structural mechanics simulation made by Solidworks motion module. The structure of the system will be modified when systematic errors exceed the required limit values until it reach the required value.