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According to rotary vibration at the end of the concrete pump truck boom, analysis of the boom rotary vibration mechanism is carried out. Rigid-flexible coupling dynamics model and vibration control co-simulation model of the boom system are established. The analysis of the dynamic model solution shows that the simulation rotation vibration displacement curves at the end of the boom are coincided...
Radio Frequency Identification (RFID) technology is a contactless automatic identification technology. With the wide application of this technology in many fields, anti-collision algorithm to solve the problem of multi-tag identification becomes more and more important. The current RFID anti-collision algorithm is mainly divided into two categories: ALOHA based algorithm and tree based algorithm....
The purpose of this work is to explore the possibility of using (Multi-disciplinary Design and Optimization) MDO frameworks for complex system design of space experiment. Considering both launch and space environmental requirements, the multi-objective optimization of a novel nested flying vehicle for space science experiments is carried out by decreasing launch weight, frequency response, vacuum...
In this paper, we will expand the industrial ecosystem to three subsystems: the economy subsystem, the environment subsystem, and the innovation subsystem. Based on principal component analysis and grey correlation analysis, a model of the optimizing degree of Chinese economic industrial ecosystem is developed at the provincial level, and a mathematical definition of the optimization degree is provided...
Due to the advantages of high efficiency and low cost, grid connected inverter based transformerless PV systems have been widespread during the last two decades. The key problem, which arises in absence of galvanic isolation, is the presence of a common mode (CM) leakage current on both AC and DC side of the inverter. In this paper, the influence of long DC side cable to the CM leakage current is...
A finite element analysis model for the large diameter and thin-type KDP plate has been built up based on the experimental measurement data of surface profile and its mounting system with different types and sizes fabrication error. The impact of the fabrication error of KDP plate and its mounting system on the additional surface variation of KDP plate has been studied and simulated. It's shown that...
Warehouse Logistics Management is an important link in the business operation. Due to the lack of the systematic planning and scientific management, problems of incomplete marks, unfixed places for storage and the overlapping in the picking routes, etc. always exist. On top of analyzing the problems existing in the warehousing, the paper will further discuss about replanning or reorganizing of the...
With the unceasing changing of the domestic foundational software's operational environment, its flexibility is a kind of exceedingly important and considering factor. In order to evaluate the flexibility of domestic foundational software, to decrease the loss caused by poor flexibility of software, this paper puts forward a user-oriented flexibility evaluation model. Based on the past research, this...
Calculating additional losses of the transformer driven by load harmonics is very significant to economic, safe and efficient operation of transformer. Based on the transditional model of additional losses driven by load harmonics, the simplified model is put forward, as well as the calculation equation. According to the simplified model, a method to monitor the transformer harmonic losses online...
In this paper, the author proposed the concept of incomplete and fuzzy information systems based on incomplete approximation spaces and fuzzy sets, and analyzed the approximate class-precision and boundary in rough set systemically, via introducing the thought of inner & outer boundaries and inner & outer approximate definable sets combining rough set with fuzzy set, variable precision theory,...
One of the advantages of Web service technology is it can create added-value services and complete the complex transactions or workflows by combining existing ones. However, they always run in a highly dynamic and change environment, during the execution process, if one component service fails or becomes overloaded, the failed services replacing mechanism is needed to ensure that the running process...
Soft starters have been widely used in fans and pumps drives. It is difficult to start high-power heavy-duty induction motor for traditional soft starter. To solve the problem of soft starter for large power and heavy load in conventional soft starters, the soft starter based the theory of discrete frequency is studied in this paper, which can make motor start with high torque and little current....
In Web Services composition, effectively appraising of QoS of Web Services is a main method of service selecting. Most of current QoS models do not consider the uncertainty, subjectivity, interacting and business relativity of the non-functional attributes of services. And they lack of the deep and thorough analysis of user requirements. Thus they are not able to provide sufficient support to service...
This paper presents the design and analysis of an autotransformer based 24-pulse rectifier. The proposed ac-dc converter is based on a star connected autotransformer, designed for producing 15-phase shifted ac voltages for 24-pulse rectifier for effective harmonic reduction. Compared with 3-phase rectifier, the proposed 24-pulse rectifier can reduce the equivalent capacity of transformers and realize...
Self-Adaptation has gained wide attention in SOA (Service Oriented Architecture). Composite services adjust dynamically to the change of environment during execution through adaptation. Most existing performance analyzing methods on composite service neglect the distinguished feature of environment, which impedes their application in self-adaptive composite services. This paper proposes a stochastic...
SaaS and multi-tenancy has become a trend which gets more and more popularity. On this basis, how to monitor the information of SaaS service process and the instance information of every service of the interaction is an important problem. Based on the model of interaction-oriented SaaS application support for multi-tenancy, this paper proposes a mechanism for tracking the business instance of SaaS...
This drought, especially for city seriously affects the social and economic development of city. Drought is characterized by their high frequency, broad range and great loss. Nanchong city is one of the major cities with drought in Hilly Area of Central Sichuan Basin. This study presents a model of risk assessment of urban drought which integrates hazard, exposure, vulnerability and emergency response...
After the improvement of the actual theory of cold roll forming and the practical rolling process, author present the concept of dynamic chain model and node model, research steel strip forming mechanism based on information system. The problems such as the forming process research, the effects of friction on the forming, analysis of stress and strain were studied in the new model. What is more important...
The verification of service replaceability is an important issue for service composition in a seamless way. In this paper, it proposes the definition of service behavior impaction to judge the service replaceability. It defines the service behavior model based on the colored Petri Net, put forward service behavior impaction and service replaceability. The application of the method in the scenarios...
As SNMP management system has some weaknesses due to its built-in functional limitation, NETCONF, with XML as its data encoding scheme, is viewed as a promising solution for future network configuration management. To make NETCONF interoperable and capable of manipulating data in a standardized fashion, an extensible data modeling language, YANG, was proposed to model data including configuration...
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