Abstract:Based on the analysis of existing anti-sliding structure and the research status at home and abroad, according to the current main landslide anti-slide piles and prestressed anchor cable anti-slide pile structure of ordinary structure, this paper analyzes the anti -slide pile indoor and outdoor test, internal force calculation method, calculation method of pile spacing, pile method for determining the position and the anchoring depth re- search present situation. It discusses the circumference coupling anti-slide pile-soil and the structure of the new type arch string coupling anti-sliding research present situation and development trend in the future. Fur- thermore, the idea and method of post-evaluation of landslide prevention and control effect are put forward, and the popularization and application of new theory and technology of landslide prevention and control are empha- sized on the premise that the pile-soil coupling gives full play to the soil's own strength. A new type of anti- sliding structure with "zero displacement" control is put forward according to the requirements of controlling creep slip of high-speed railway roadbed.

Abstract:The Nanchang Metro Line 2 has an ultra-small distance segment on the east bank of the Ganjiang River. The impact of ultra-small clearance on the two-line construction is still unclear. In this paper, the nu- merical simulation analysis of the ultra-small distance segments of two tunnels is carried out by the 3D solid e- lastoplastic model. The results show that the total stress on the central axis of the tunnel lining is the largest; the new tunnel excavation has a hysteresis for the deformation disturbance of the pre-built tunnel; the maximum dis- placement occurs behind the excavation section, and the maximum limit of excavation disturbance exists; The tunneling makes the deformation of the pre-built tunnel lining up to the horizontal axis above the excavation side and the maximum stress increment, showing the phenomenon of bending to the excavation side. If it is necessary to strengthen the stratum, the area can be considered. The internal force disturbance of the tunnel is advanced, that is, the internal force increment of the tunnel within a certain distance in front of the excavation face is the largest.

Abstract:The plane coupling dynamic model of pantograph and catenary was established by using pantograph's ternary concentrated mass element and elastic catenary's contact element. The actual line of Beijing-Shanghai high-speed railway is taken as the simulation object.When the train running speed reaches more than 350 kilo- meters per hour, dynamic performance parameters of catenary in different contact line tension systems are ana- lyzed with the constant tension of elastic sling and messenger wire. According to the design specification of high-speed railway, dynamic performance parameters of pantograph system at four kinds of operating speeds are compared, and pantograph dynamic simulation software is used to realize the dynamic response of pantograph system over 350 kilometers per hour. Research shows that: when the running speed reaches more than 350 kilo- meters per hour, the dynamic parameters of the catenary meet pantograph single bow running speed; as the ten- sion of elastic sling and messenger wire remains unchanged, contact wire level and tension uplifting of panto- graph on the anchor point will increase with increase of speed, thus affecting the flow quality and reliability of pantograph-catenary.

Abstract:The improved Rayleigh-Ritz method was extended to the analysis of bending vibration characteristics of Mindlin plates in arbitrary shapes. The domain of displacement test function was extended to the rectangular region outside the curve region, and the improved Fourier series was selected as the test function. The complex boundary conditions were simulated by adopting the linear springs whose stiffness is adjustable. The numerical method was introduced to disperse the boundary edges and by summing up the elastic potential energy of each micro section the elastic potential energy of the whole boundary was obtained. Then, the problems of complex boundary conditions of curved edges brought by arbitrary shape problems can be solved. The equation was es- tablished based on the energy variation principle and Mindlin theory. By comparing the results of present method of the straight edge and curved edge plates with the results of the reference and the finite element results, the accuracy of this method is proved, which provides reference for the practical engineering problems.

Abstract:Thanks to the advantages of convenient construction, reliable reinforcement effect and obvious eco- nomic benefits, the method of pasting steel plate reinforced concrete beams has been widely used in the field of structural reinforcement and engineering transformation. A new construction process was adopted in the experi- ment: by adding quartz sand to the glue layer, the three factors of steel plate thickness, rubber layer thickness and quartz sand thickness were combined. The representative experiment beams which were loaded were deter- mined by orthogonal test method, and then the interface stress of the steel plate on the bottom of the concrete beams was analyzed. The results show that the addition of quartz sand in the glue layer contributes to the effec- tive transmission of interfacial stress, so that the steel plate can fully exert its effect. Finally, suggestions are proposed for the dosage of quartz sand in practical engineering application.

Abstract:In the context of the heterogeneous characteristics of consumers' demand and the government fixed subsidies, a two-stage car supply chain consisting of a single automobile manufacturer and a single retailer as the research object was discussed. A multi-party game competition model based on the non-cooperative game theory was established and solved by the backward induction. In the sensitivity analysis and comparative analy- sis, the changing rules of equilibrium solutions of production decision, economic benefits, environmental impacts and consumer surplus under the subsidy policy were explored. Then, the environmental impacts driving factors were captured by the simulation experiments. The results show that it is feasible for manufacturers to adopt elec- tric vehicles production under subsidies and achieve a win-win situation, where both economic benefits and con- sumer surplus improve. In addition, consumers' acceptance of electric vehicles plays a decisive role in improving social welfare and reducing environmental impact.

Abstract:Taking the design and management of the elevated passenger entrance passage of Nanchang West High-Speed Railway Station as an example, this paper compares and analyzes the traffic efficiency of three dif- ferent passageways of the present elevated passenger passage by collecting the data of the flow, arrival and pass- ing time of vehicles etc. Based on present problems analysis, the paper proposes the idea of improving the de- sign, and evaluates the effectiveness of the improved scheme using the queuing model. The paper puts forward that the improved scheme with the parking space set explicitly in the parking lanes, the driving lanes not affect- ed by parking，and the pedestrian safe passage considered, has better operating efficiency than the situation of simply dividing lanes on elevated entrance platform.

Abstract:The study of passenger spatial behavior patterns in the terminal building is essential for the terminal managers to meet the needs of passengers with different attributes and improve service levels. The research adopts the K-means clustering method to subdivide spatial selection behaviors of domestic departing passengers of Nanjing Lukou International Airport Terminal 2. In the process of segmenting passengers, it clusters behav- ioral paths of domestic departing passengers into five types of spatial behavior patterns and the different distribu- tions of the basic attributes such as gender, age and income of passengers in these five types are analyzed. The research also shows that commercial facilities in terminals are more attractive to female passengers; young and middle-aged passengers are prone to stay in non-functional areas and engage in consumption activities; passen- gers who have not taken flights before have strong interest in various commercial facilities in terminals; and there is a positive correlation between income levels and passengers' choice probabilities of non-functional areas of terminals. Therefore, study on the differences in air passenger spatial behavior patterns has a practical value to improve the management level of Nanjing Lukou International Airport and optimize spatial layout.

Abstract:With the rapid development of software and hardware construction of railway logistics, big data and internet of things have been widely applied in railway logistics. The research of intelligent railway logistics sys- tem based on cloud computing, artificial intelligence and real-time online monitoring technology has become a hot topic. With the shortcomings of some railway intelligent logistics systems and design schemes, which is in lack of security authentication and data integrity protection in the process of information exchange, this paper proposed an efficient short signature scheme. Then, it designed a real-time logistics tracking protocol for railway based on the signature scheme. Finally, the protocol interaction of the signature scheme was simulated. The re- sults show that the signature scheme has the advantages of less computation, higher efficiency and less protocol interaction, which can effectively solve the problems of data integrity protection and reliable authentication of re- al-time logistics information.

Abstract:Rolling bearing is the core component of large rotating machinery, and the fault diagnosis of rolling bearings is of great significance to guarantee the stability of rotating machinery. EMD is a very effective method for fault diagnosis because of its unique advantages in the analysis of nonlinear unstable signal. However, the in- trinsic endpoint effects of EMD cause non-negligible feature extraction errors, which will affect the accuracy of fault diagnosis. To solve the above problem, this paper proposed an EMD method based on undistorted source signal whose endpoints are extreme points(UEE-EMD). EMD restrained the emergence of endpoint effects from the source through overlapping sampling and extremal endpoints, obstructed the signal distortion by cutting the ends of IMFs, and guaranteed the accuracy of the feature extraction. The simulation experiment of fault diagnosis shows that the rolling bearing fault diagnosis based on UEE-EMD achieves better diagnosis results.

Abstract:China's architectural lighting design mainly adopts the method of utilization factor with relatively com- plicated calculation and it takes a lot of calculation time in the actual design. There may appear large errors when some domestic companies complete lighting design by getting room sizes non-automatically and checking the specification repeatedly. The electrical lighting design automation system uses the average integral projection function and morphological operation to extract the load-bearing walls and improve seed filling algorithm to i- dentify common walls, which can effectively extract all the walls in the building and extract the size of each room. By extracting the Gabor feature and using the Bayesian formula which integrates the classifier of Chinese character rude classification with the classifier of Chinese character particular classification, it can accurately obtain room parameters including the types of rooms. Then, it applies dialux to collect the lighting scheme in the rectangular room that meets the lighting design requirements as a training sample to train the generalized regres- sion neural network (GRNN). In order to improve the prediction accuracy, the 4-fold cross-validation method is used to optimize the smoothing factor and obtain the best input and output values. Experiments show that the op- timized GRNN network has faster convergence speed. The case simulation proves that the proposed electric lighting design automation system can quickly and automatically obtain the lighting layout plan that meets the specifications.

Abstract:Aiming at the problem that rolling bearings are prone to failure in large mechanical equipment, an e- valuation method for rolling bearings' performance degradation is proposed, which combines the complete empir- ical mode decomposition (CEEMDAN) of adaptive noise with the grey correlation analysis. Firstly, by using CEEMDAN to decompose the vibration signal of the whole life time of bearing, the energy entropy feature was obtained. Then, by taking the characteristic of the normal vector as reference variables of gray correlation analy- sis, the correlation degree was calculated between the feature vector and the normal vector of the bearing’s whole life time as a quantitative evaluation index in the process of performance degradation. The results show that the method can figure out early failure and describe the bearing degradation at each stage. Finally, CEEM- DAN and Hilbert envelope demodulation were used to verify the validity of the evaluation results.

Abstract:Three groups of self -tapping screw roof slabs were tested to investigate the influence of material strength and fixed position of roof slabs on the wind resistance of self-tapping screw roof slabs. The test results show that with the increase of the strength of the metal roof panel, the wind resistance of the self-tapping screw- type metal roof panel increases significantly, while the location of the self-tapping screw(at a quarter of the peak and trough) has little effect on the wind resistance of the roof panel system; when the self-tapping screw is at the peak, the wind resistance of the self-tapping screw is at a quarter of the trough according to the code and the formula calculation is safe.

Abstract:With the continuous development of the power industry, the prediction of power load on the power us- er side has played an important part in meeting the balance between power supply and demand of users and power grid planning. Under the background of big data, in order to improve the accuracy of power load forecast- ing results, and in view of the influence of the time for historical data, considering the limitations in historical data of the same period and recent historical data respectively, based on the principle of time-dominant, the ex- ponentially weighted moving-average was introduced to distribute the weight of data at different time, and an improved power load forecasting model was proposed. Taking the power load forecasting in a certain area as an example, the predicted result was improved by 29.5% in root mean squared error and the mean absolute percent error increased by 25.7%. The analysis results show that the proposed model is feasible and has high accuracy, providing a reliable reference for the power load forecasting.

Abstract:This paper explores the treatment of simulated wastewater from graphene-based composites. The treat- ment of acid fuchsin and methylene blue by TiO₂/RGO and Fe₃O₄/RGO is investigated and characterized. In TiO₂/RGO system, the removal effect of acid fuchsin can reach up to 74.01%; the removal effect of methylene blue can reach up to 94.79%. In Fe₃O₄ RGO system, the removal effect of acid fuchsin can reach 78.55%; the removal effect of methylene blue can reach 98.02%. The results show that the magnetic graphene Fe₃O₄/RGO treatment result is better than that of TiO₂/RGO.

Abstract:Smart manufacturing, smart products and smart operation have come into being in the merging process of traditional production and manufacturing with intelligence software. The new business can not only help the manufacturing enterprises realize the cost efficiency, but also give the enterprises a new value orientation. How- ever, at present, some new enterprises have not established a complete system for the project accounting and management. In view of the important role of cost accounting in business decision-making, this paper provides enterprises some reference from the aspects of establishment, accounting and evaluation of intelligent manufac- turing projects.

Abstract:Safe and efficient vehicle-ground identity authentication scheme is the basis for the safe railway oper- ation. Combined with the requirements of secure data transmission of train control system for mobile communica- tion system and the development direction of railway wireless communication network, a LTE-R vehicle-ground identity authentication protocol based on pseudo-random number and hash function is proposed. The IMSI trans- mission is replaced by the anonymous identity PID generated by IMSI and random number, which solves the se- curity problem caused by IMSI leakage. The authentication process is completed by using the temporarily gener- ated authentication key NK instead of the permanent root key K, and the security of root key K is improved. The correctness of the protocol is proved by the certification test method. The analysis confirms that the LTE-R iden- tity authentication scheme proposed in this paper has good security and anonymity, and the computational com- munication consumption meets the efficiency requirements.

Abstract:Under the background of the maturity of wind power generation technology and grid-integrated tech- nology as well as energy saving and emission reduction, a multi-objective dynamic environmental economic dis- patch model of power system with large-scale wind power integration is constructed. The model aims at the total fuel cost and pollution emission of thermal power units, and takes into account the power balance constraints, active power output constraints, climbing constraints and the positive and negative spinning reserve constraints of the system. The constructed model is solved by non-dominated sorting molecular differential evolution algorithm. Finally, the rationality and superiority of the proposed model and algorithm are verified by an example analysis.

Abstract:With the rapid development of railway lines, high voltage disconnectors have become the most fre- quently used high voltage equipment. The reliability of OCS isolating switch is of great significance for ensuring the stable operation of traction power supply. As a very effective tool for clustering analysis, the K-means algo- rithm processes the isolated current motor's current signals monitored by the motor current acquisition system, obtaining the cluster centers and the change of their positions, thus determining the fault isolation switch with mechanical fault classification for further processing. Because of the complexity of mechanical failure of high voltage isolation switch, and the limitations of the K-means algorithm itself, this paper proposed an improved K- means algorithm by combining the adaptive weights and GA algorithm (genetic algorithm). K-means algorithm avoided such defects as dependence on initial value and local convergence. The validity of the methods was ver- ified by simulating the actual data. It is found that the mechanical fault of the high-voltage isolating switch can be classified and used as the basis for fault classification and detection of OCS isolating switch.