Earticle

The accumulator battery test requests its system converter to output excellent charging/discharging current. According to special request, PWM converter with current mode control is analyzed and designed in this paper. Morever, a loop-locked control strategy is put forward based on dq coordinate conversion to SVPWM converters in the power accumulator battery testing system. low ripple and fast response testing current in a wide adjustable range is achieved, and high power factor is obtained. Considering resonance of LC filter, the passive damping is designed, which is based on the series resistance of capacitor. Simulation results verify the feasibility and validity of this strategy.

Recently, mobile devices with multiple network interfaces are not only being used in the daily life but also across the entire industry in diverse ways and in many different sectors, including medical, health, education, business, and entertainment. Especially, analyzing the mobile usage patterns of users, there's been an increasing number of services that provide diverse types of content on an Internet-based environment, including video conferencing and VOD streaming services. For these kinds of services, due to the limitations imposed by the client/server architecture which involves going by a base station, the need for P2P is currently being emphasized, which allows direct communication between mobile devices. In order to improve the stability of mobile P2P services, however, there are challenges to overcome, including constraints of wireless communication (such as irregular bandwidth and frequent interrupts in the connection) as well as limitations of the mobile devices themselves (such as limited CPU and battery capabilities), which are classical mobile computing problems. Accordingly, this paper suggests a peer management policy for mobile P2P environments with high degrees of mobility which is designed to increase the efficiency of data transmission by taking sufficiently into account network characteristics and energy efficiency of mobile devices.

This research considers a low carbon scheduling problem in unrelated parallel machines. To solve this problem, we first establish a low carbon scheduling mathematical model. Then an iterative ant optimization algorithm is presented. Furthermore, parameters of proposed iterative ant optimization algorithm are selected by Taguchi methods on generating test dataset. Finally, comparative experiments indicate the proposed iterative ant optimization algorithm has better performance on minimizing energy consumption as well as total tardiness.

An inexact two-stage stochastic programing model was applied to sustainable utilization of water resource under uncertainty in Dalian city. The developed model, integrated the two-stage stochastic programing and inexact optimization, could deal with uncertain problems expressed as probability distributions and discrete intervals. After formulating the model, a hypothetical case based on the comprehensive planning of sustainable utilization of water resource in Dalian city was employed for demonstrating its application in the three different planning year, which was 2015, 2020, 2030. The optimal allocation of water resource with maximized system benefit among different users had been obtained. The result indicated that different water allocation schemes and water deficits with varying net system benefits would be hold in response to different streamflow levels. In a word, The ITSP model provided significant decision support that adjusted to the existing schemes of water allocation within a complex water resource system under uncertainty for water managers.

Technology is moving beyond the personal computer towards a trend of embedded microprocessors in everyday objects and home appliances. The recent advances in sensor networks and devices with computing ability have provided us the necessary technology to make smart spaces. In such spaces, user activity and behavior are taken into account in order to provide adequate and accurate adapted services to the current context. Services are provided proactively (without explicit user intervention) and in an unobtrusive manner. The main objective of smart spaces is to provide services to the user for improved comfort, energy savings, security, and tremendous benefits for elderly persons living alone or persons with disabilities. Despite the interesting number of proposed architecture for building smart spaces, there still exists a lack of a generic software architecture for the development of such spaces. The major weakness of proposed architecture is that they have not dealt in depth with context-awareness, which is a key feature especially in context-aware services adaptation in smart spaces. In this paper, we propose a multi-agent architecture for building a smart living room with a focus on context-awareness aspects. The proposed architecture is generic enough to be easily used in any smart space.

For nickel base superalloy GH4169 is investigated in the process of machining tool is easy to wear，cold-setting severe deformation, surface quality is difficult to guarantee and so on, using different carbide cutting tools and different tool geometry parameters, nickel-based superalloy GH4169 be turning experiments. The cutting tool material, cutting tool rake angle and corner radius of the influence law of super alloy surface roughness, different tool wear condition analysis. Results show that using K313, KC5510, SM1105 three kinds of cutting tool materials processing, the difference of obtained surface roughness is not big, but for the tool wear condition, the rake face and rear face wear of KC5510 is small. Integrated tool wear and workpiece machined surface quality, in the selection of the four tool materials, KC5510 is more suitable for processing GH4169; Single factor experiments found that with the gradual increase in rake angle and the corner radius, the surface roughness gradually decreases. Therefore, when GH4169 be turning, in order to reduce the surface roughness, grain refinement should be used, together with the PVD TiAlN coating carbide cutting tools, while a larger rake angle and corner radius are selected.

Pakistan is an energy deficient country and the current power crisis of Pakistan is hampering its economic development. Pakistan is naturally benefitted with different renewable energy resources; out of which solar and wind energy are the main highlights. This research work will provide an assessment of the renewable energy potential of the Baluchistan region. A comparison of the economic and financial analysis for a centralized hybrid renewable energy system has been simulated by using Homer software. Three cases have been proposed in which centralized standalone solar PV system, centralized standalone wind energy system and a hybrid combination of both centralized standalone solar and wind energy system have been studied. Homer software has been used to devise the most optimal solution. The simulations confirm that the best optimal solution is the hybrid renewable energy system for the rural electrification of the proposed region.

In order to monitor the six factors which is the most crucial influence on livestock production in livestock house, this paper designs a set of livestock house(LH) environmental perception system based on wireless sensor networks. This system is composed by a number of data acquisition nodes(DAN) connected by using Wireless Sensor Networks. Inside of DAN is equipped with six type of sensor which in charge of collecting Real-time environmental data in LH, including carbon dioxide sensor, ammonia gas sensor, illumination sensor, relative humidity sensor and so on. The communication mode between upper-computer and central node is GPRS, to research on remotely control environmental parameters in LH in the future. The upper-computer could treat data which is uploaded by several central nodes through some way, for example, data analysis based on established protocol, threshold judgment, etc. Then, the real-time data is stored by database. The stability and veracity of the system was verified by field tests which set technical grade monitors as control groups. Comparing with industrial-grade high precision monitoring instruments, the error of collecting data and wireless communication network is within normal error range, By SPSS, the result shows that there is no significant difference of P-Value(P>0.05) in different groups at same time.

In this paper, through the actual investigation of the production and operation in the main grain producing areas, the authors collected data from 89 farms in Northeast China. This paper first describes the individual characteristics of the family farm operators, the size of the land and the circulation of the farm, the situation of the farm to obtain funds and information services. Then we estimate the development efficiency based on the DEA model, by using the survey data. The results show that family farm business process is lack of new agricultural technologies; family farmers’ management ability is weak, the factors of production inputs such as unreasonable causes share of the family farm in Northeast DEA efficiency is low. In order to develop the efficiency of the family farm, government should put forward and optimize the land circulation system, pay attention to the quality of the family farmers, and improve the agricultural technology extension system, optimize the allocation of production factors.

The time dependent vehicle routing problem (TDVRP) is defined as a vehicle fleet of fixed capacities serves customers of fixed demands from a central depot with consideration of road networks conditions. The travel time between two customers or between customer and the depot depends on the distance of the two points and time of a day. A mathematical model is formulated for the TDVRP problem and a simulated annealing (SA) based improvement method is proposed for solving it. The main objective is to minimize the number of vehicles and the second objective is to minimize the total travel distance of the vehicles. The proposed approach was tested on the 56 test problems with 100 customers from Figliozzi’s benchmark, and results show that the improvement metaheuristic could get better solutions than Figliozzi’s algorithm in the different time dependent speeds function within an accepted computational time.

Support vector machine(SVM) can effectively solve the classification problem with small samples, nonlinear and high dimensions, but it exits the weak generalization ability and low classification accuracy. So an improved genetic algorithm(IGA) is introduced in order to propose a new classification(IGASVM) method based on combining improved GA and SVM model. In the proposed IGASVM method, the self-adaptive control parameter strategy and improving convergence speed strategy are introduced into the GA to keep the diversity of the population, promptly reflect the premature convergence of the individual and escape from the local optimal solution for improving the search performance. Then the improved GA is used to optimize and determine the parameters of the SVM model in order to improve the learning ability and generalization ability of the SVM model for obtaining new classification (IGASVM) method. Finally, the experiment data is selected to test the effectiveness of the proposed IGASVM method. The experiment results show that the improved GA can effectively optimize and determine the parameters of the SVM model, and the IGASVM method takes on the better learning ability, generalization ability and classification accuracy.

The enactment of the region of Mount Sewu as a Global Geopark Network (GNN) on 19 September 2015 has given a responsibility for governments and communities to develop this region with a proper concept. The karst of Mount Sewu surrounding the Gunungkidul Regency, Wonogiri Regency and Pacitan Regency is one of the most well-known karst regions in Java Island for its uniqueness. Geoheritage and social-cultural wealth in this region becomes the base of its enactment as GGN. This study presents geotourism as a strategy of geosite empowerment towards the tourism sustainability in Gunungkidul regency. It is found that the Geotourism development comes to be an appropriate strategy in developing 13 geosites in Gunungkidul for fulfilling the directive of the policy on the local and national tourism development, demands of the development trend towards the tourism interest among community and the directive of GGN in accordance with the concept as outlined in UNESCO. The directive of the development of this geotourism has been formulated through a synthesis of various analyses including the analysis of government, analysis of potential tourist attraction, and SWOT analysis. The dialogue from a variety of analyses required to produce the formula of geotourism development of various analyses is needed to guarantee the production of a formulation of the proper and synergic directive for the geotourism development analysis necessary to guarantee the formulation of appropriate and synergic Geotourism development with various existing development guidelines.

To meet the needs of future mobile communication, an essential approach is adopting new architectures of the mobile communication network and advanced technologies of wireless transmission. We choose GNU Radio and Universal Software Radio Peripheral (USRP) to construct a test platform for mobile communication technologies based on SDR. With the platform, a real communication conforming to LTE-Advanced physical layer specification is implemented by the PSS/SSS of LTE radio frame. The platform provides a tool to design, test and verify mobile communication technologies in real environment.

UAV remote sensing image has the characteristics of higher spatial resolution, fine timeliness and high flexibility. It is widely used in many fields such as agriculture, forestry, soil resources and so on. Especially in agriculture, it plays an important role in information acquisition of agricultural production and agricultural condition monitoring. In the experiment, high-definition digital camera and multi-spectral camera are used to capture the visible light and near-infrared remote sensing image. Two pieces of 3m*3m calibration cloth is used for radiometric calibration and SIFT algorithm was used for image mosaic. This paper discusses the application of remote sensing image in agriculture, including rice lodging monitoring, diseases and pests monitoring, crop growth monitoring and crop nutrient diagnosis. The results show that UAV remote sensing provides an effective means for agricultural condition information acquisition, and has wide application prospect.

In dangerous industry fields such as construction, shipbuilding, the mining industry, and other field, many employees have lost their life due to risky environment. As result, the costing of social and industry have been increased. To solve this problem, wireless body area network technology can implement by converging ubiquitous sensor network and wireless data communications. The wireless body area network technology has been issued recently and studied by standard institutes (e.g. IEEE TG 802.15.6), universities, and research labs. This paper studies management issues in wireless body area network for industry safety. We design human object as wireless body area network on the employee’s body and propose management method for industry safety.

The design of urban residential buildings in cold region is different from that in low latitude region, or the design of general public buildings. The precise grasp of dwelling unit type and appearance style, effective control of building heating and thermal insulation efficiency and the implementation of the sustainable concept of low cost construction and environmental protection are dependent on the early scientific and rational design. And the building information model technology just acts as a platform for the optimization of the design. The study is based on the engineering projects; the planning, the design of building facade, collision detection optimization and the full participation of construction cost control in building information model provide a new train of thoughts and research reference for the residential design in cold region, in the context of the digital age, and to a certain extent, the study looks forward to the future urban residential design and construction industrialization prospect in the cold region . Building information modeling technology improves the design efficiency and quality with its precise data processing and analysis, avoids the defects in design and the material waste of construction and environment pollution, significantly enhancing the pre-processing level of construction structure parts, which is in line with the energy-saving environmental protection and rural environmental construction phil

This paper presents an intelligent positioning algorithm for transmitting station. By using GPS and RSSI, the influence of RSSI value can be reduced. The advantages of multi angle positioning method and centroid localization method are combined. The algorithm required less precision positioning device, also the least square method is used to reduce the error of location in urban areas. The method is simple and convenient, and the simulation results show the practicability of the algorithm.

Philippines archipelago experience scattered rain showers and most people are caught unprepared. Despite these changes in patterns especially in low elevated areas, road is totally impassable to the most type of vehicles due to flood. There were flood control programs implemented by the government and new flood equipment was used but seems not effective enough to solve the problems. This paper presents an analysis in the design of gravitational sub-pumping station in riverside road to assist the existing pumping station in that locality. Such a design can serve as a model that can be implemented to the other sections of the city. The design of this pumping station involved investigating the existing sub-pumping station in terms of its structure, financial resources, and the effect in the health of end-users, its maintenance including the traffic, operations and reduction of flood water. A conventional gravitational sub-pumping station was designed based on the conclusion that for the city of Taguig, a uniform, consistent, simple pumping station would be the most

With the rapid economic development and constant social advancement in our country, people's production and lifestyle are undergoing profound changes, consequently resulting in traffic jams and increasingly severe challenges on the limited parking resources. How to enhance the utilization of parking places has been an important problem influencing city image and the harmonious economic and social development. This paper introduces a Internet of Things (IoT)-based intelligent parking management system, innovatively proposes a non-source RFID card that utilizes label and sensor binding to actualize vehicle identification and to accomplish functions of vehicle entrance & exit authentication, automatic charging, and parking lot certification, eventually further enhancing the utilization, traffic efficiency and service level of parking places.

In today’s world, nothing seems to be impossible, due to the astonishing advancements in science and technology. Now days, many humans are dependent on internet for their daily chores. But, congestion is one of the major issues, which affects the performance of such data networks. Thus, in order to control congestion, various schemes have been developed. In this research paper, the active queue management (AQM) scheme i.e. random early detection (RED) AQM algorithm is modified using fuzzy logic MATLAB tool, in such a manner that the efficient and reliable performance of the network can be maintained and improved as well. The results are verified with the help of QualNet 6.1 network simulator.

With the rapid development of online travel industry in our country, more and more tourists begin to get travel information, booking travel products through the network. The author first analyzes the characteristics of tourism consumption demand, and finds out the key factors affecting tourism consumption based on urban and rural areas. The result shows that the income level of consumers, the price of tourism products, the quality of tourism products are the key factors affecting the urban residents, while rural residents pay more attention to the tourist will and the price of tourism products. Consumption awareness is the most important factor that will affect tourism consumption of rural residents, the higher education rate among rural residents increase 1% will lead rural residents per capita tourism consumption increase 32.16 RMB. On this basis, we put forward relevant policy suggestions.

In recent years, with the continuous development of the construction industry, the development of high-rise steel structure growth fast in China. At the same time, it is very important to analyze the structure of these high-rise steel Building, especially the seismic performance analysis. In this paper, the authors analyze the seismic performance of high rise buildings by using finite element modeling, dynamic and static analysis. Through the static analysis of steel structure that combined with dead load, live load and wind load, the result shows that when steel support under the force, the maximum node stress mainly appears in the low-end and the ninth layer, which is located in 19, 22 axis node stress is the largest, respectively as 65.9Mpa, 62.6Mpa, it is safety and within the strength limit. The results can provide a theoretical basis for the seismic design of steel structure buildings

With the rapid progress of technology, the society puts forward higher requirements for talent cultivation. The sport teaching emphasizes student’s sports experience and participation, the course content is wider, including physical, psychological and emotional health. In previous studies, people don't pay much attention to the sports teaching environment, lack of evaluation of sports teaching environment. In this paper, we first analyze the evaluation standard of classroom teaching quality, and then we analyze the factors that will influence physical education. The result shows that more than 32.9% teacher satisfied with sports venues equipment, more than 72.1% students think the environment will have a great impact on their learning. In addition, the size of a class will also affect the teaching effect. On this basis, we put forward relevant proposals.

Microgrids can operate both in grid-connected and islanded modes. It is essential to protect microgrids against all types of faults in both of the operation modes. Conventional overcurrent protection schemes are not adequate for microgrids due to bidirectional flow of fault current and limited flow of fault current through semiconductor devices. In addition, the setting values of all the concerned relays need to be updated after any change in system operating conditions. Centralized and decentralized adaptive protection schemes are generally used for protection of microgrids. In this paper, a hybrid adaptive protection scheme has been proposed for protection of microgrids. Computational burden and data storage is distributed among the local controllers and the central controller. A gateway is proposed for communicating between the serial interfaced devices and the IEC 61850 process bus. Finally, a framework has been introduced for implementing the proposed hybrid protection scheme for adaptive protection of microgrids by using IEC 61850-based intelligent electronic devices (IEDs).

In embedded system, man-machine command system is the main way for people to use the system. The command in man-machine system often needs upgrade. It is a hard work to upgrade the old command with the new version of the command. A novel man-machine command system proposed in this paper can be used to upgrade the command system in a smooth way. The method comprises: split the embedded system into different operating states, provide two command versions (old version and new version), and attach different privileges according to system operating states and command version. According to the current operating status of the system and the privilege of the command, it is determined whether or not to execute the command and whether or not prompt information about the command to be upgraded should be shown to the user. By using the method proposed in this paper embedded software can be a smooth upgrade. The old version command can continue to use, and the progress of the new version command replacing old version command will be a smooth progress.

With the gradual popularization of the network, the national fitness campaign should apply the developed network system, and provide the scientific method of fitness. In recent years, home fitness and community sports promotes the popularization of the national fitness program, and become the mainstream way of fitness. In this paper, the authors construct the evaluation system of community sports activities by using network survey. The result shows that “community sports service system” is the most important factor in primary indicators; the weight is 0.2906; while “socialization degree of community sports”, “residents’ sports science literacy” and “sports family” are also the important indicators. At the same time, sports features and consumption are the key factors of home fitness. On this basis, the author puts forward

Urban construction is the important infrastructure of the city, and it is the material basis for the urban survival and development. In this paper, a NASUCI (Novel Analysis System for Urban Construction Information) is proposed. Using data mining technology, case-based reasoning technology, the system focused on providing better decision support for urban construction. The system is composed of user management, enterprise information management, geographical information management, construction information display, construction information management, urban construction information analysis, and comprehensive statistics. NASUCI can help urban planners from a large number of original data mining more effective information, and to provide the chart display, make the analysis of urban construction become more scientific and efficient.