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The low voltage ride through capability is an important aspect of the operation safety of the wind farm. According to the situation of the lack of effective monitoring of wind turbine operation, a online tracking quantitative evaluation method of wind turbine low voltage ride through capability (LVRT) is brought forward. This method realizes the monitoring and analysis of the safety of the operation...
Aiming at the problems that the scale of distribution network investment is gradually increasing and the investment effectiveness still needs to be improved, the paper propose a comprehensive assessment system of input-output benefit for distribution network construction project. Firstly, select input-output benefit indexes basing on key factors. Secondly, propose index evaluation criterion determining...
The working status information of key equipments serving at operation and control system is of great value for safe and productive operation in urban rail transit. Properly utilizing and tracking the working status from operation record data, is for sure meaningful in evaluating the working status of those key equipments, and can thus acquire the stage status in their life cycles. In this paper, based...
This paper presents a composite element evaluation model of urban mountain road safety. First, create multi-level indicators of road safety, which are divided into the cost, benefit, fixed and interval. Second, build evaluation matrix of composite element for mountain city road traffic safety, use information entropy theory to describe uncertainty of portray Indices in order to calculate the composite...
With the rapid development of human-computer interaction technology, gesture recognition becomes one of the key technologies of human-computer interaction. In this paper, we propose a new method of dynamic hand gestures recognition. The method adopts the hierarchical identification model for dynamic hand gestures recognition. First, we combine frame fusion with density distribution features for rough...
In this paper, the concept of invisible conveyance ability for logistics enterprise is put forward. According to the characters of road conveyance for logistics enterprise, we establish the index system of road conveyance capacity. After delimiting and analyzing the related indexes, we build a model based on the BP neural network from three stages, and make an empirical analysis, finally discuss the...
As the most important equipment in compressor station, the performance of centrifugal compressor unit is highly concerned with safety production and economic benefits of gas-transmission enterprise. In order to ensure well operating condition of centrifugal compressor unit, we should firstly make clear the design principle of index system of risk assessment, and establish the reliability block diagram...
First-class function pointers are common in low-level assembly languages. Higher-level features such as closures, virtual functions, and call-backs are all compiled down to assembly code with function pointers. Function pointers are, however, hard to reason about. Previous program logics for certifying assembly programs either do not support first-class function pointers, or follow Continuation-Passing-Style...
Contractor safety is the key to success for construction projects, the contractor safety goals and performance evaluation system has become the important task of safety management of current building construction. This paper based on experts linguistic assessment and multi-granularity language fusion method of qualitative indexes to evaluate and rational quantification, through the C2R DEA model and...
Under the background of globalization, the basic function of resource supply and ecological environment is becoming more and more for the sustainable development of the industry itself, and its impact on the industry's own safety as much as other economic activities. In this paper, the influences of resource supply and ecological environment are discussed for industrial safety based on review of the...
Influenced by the period, cost, construction technique and quality, safety civilized construction, the reasonable selection of the construction scheme of large span steel truss is made with strong fuzziness and uncertainty. And at present there is no unified method of how to effectively evaluate the energy-saving residential design scheme. The evaluation of applying the fuzzy theory of Vague sets...
To make the crank slider protective devices to meet the requirements of regulation, optimization was carried out to the absorbing thread of the crank-slider-CST protective device. Based on the finite element model in VPG and simulation in LS-DYNA, with the orthogonal optimization design, obtained the parameters of the absorbing thread. The crash speed in these simulations is 50km/h, which is higher...
The influence factor index system of the popularization of green buildings is built. The inter-relations between each pair of indexes are decided by making inquires of the experts, and the effects of factors are analyzed using a fuzzy DEMATEL method. All factors are divided into cause factors and effect factors. The key facctors such as lack of prompting policy, poor energy conservation technology...
Due to the serious condition of safety production in hydropower construction project on the whole, it is an urgent need to evaluate hydropower engineering construction safety. But the problem of the mapping relationship between evaluation index and accidents, fixed and variable weight, randomness and fuzziness and so on, can't be solved through the traditional safety evaluation method for hydraulic...
Based on the main hazardous pollution factors remained in reclaimed water, i.e. chemicals and pathogens, and their potential hazards to human health and ecological safety were analyzed according to the different usages of reclaimed water, a new index system including hygienic, toxicological, nutrient, integrated indices was proposed to evaluate the water quality of reclaimed water. However, these...
This paper takes improving economic benefit after technical transformation on idle fixed assets of petroleum enterprises for purpose, takes use of a study method that technical management and investment management on fixed assets of petroleum enterprises are combined, draws lessons from retrofit investment evaluation index on idle fixed assets of foreign advanced petroleum enterprises, establishs...
Bridge safety evaluation is very important to ensure the safe work of bridge. In the study, RBF neural network with genetic algorithm is presented to evaluate bridge safety, genetic algorithm is adopted to select the parameters of RBF neural network to improve the performance of RBF neural network. The influencing factors and evaluation index of bridge safety evaluation are determined. Then, the experimental...
This The index system of environmental impact assessment of tailings pond is hierarchal structure. As there is inherent uncertainty in determining the evaluation grade of low-level indicators and the relationship between the up-level and low-level indicators is non-linear, therefore, the evaluation model should have to deal with the uncertainty of information and achieve the non-linear conversion...
A new approach of structural safety assessment for an existing rigid-frame arch bridge, constructed from multivariate and multi-layer analytic model. The assessment model of structural safety of existing rigid-frame arch bridges on the basis of technical condition, static loading test, dynamic loading test and load-carrying capacity, and the index system is proposed according to multivariate. In this...
According to the features of China's information security risk assessment, this paper presents a comprehensive risk assessment model based on the FSA and the AHP. This model calculated the value of information system security risks from a quantitative viewpoint. With this risk assessment method, China's enterprises could enhance their controls on the various information system security risks, thereby...
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