Significance Analysis on the Affecting Factors of Basic Reserve Fund in Power Engineering Based on FAT

Basic reserve fund is a part of the power engineering total cost. Reducing its quantity can obviously increase the utilization efficiency of engineering cost. But how can reduce the quantity of basic reserve fund, we can start from its affecting factors. To this, for the affecting factors of basic reserve fund, this paper constructed the significance analysis model about affecting factors based on its actual application situation and Fault Tree Analysis (FAT). Finally, we got the degree and prior about affecting factors of basic reserve fund. Thereby the empirical research result provided a theory reference value which can control the quantity of basic reserve fund in the engineering practice.

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Subway Gearbox Fault Diagnosis Algorithm Based on Adaptive Spline Impact Suppression

Entropy ◽

10.3390/e23060660 ◽

2021 ◽

Vol 23 (6) ◽

pp. 660

Author(s):

Zhongshuo Hu ◽

Jianwei Yang ◽

Dechen Yao ◽

Jinhai Wang ◽

Yongliang Bai

Keyword(s):

Fault Diagnosis ◽

Spline Interpolation ◽

Reference Value ◽

High Amplitude ◽

Engineering Practice ◽

Negative Effects ◽

Short Term ◽

Time Domain Signal ◽

Gearbox Vibration ◽

Long Time

In the signal processing of real subway vehicles, impacts between wheelsets and rail joint gaps have significant negative effects on the spectrum. This introduces great difficulties for the fault diagnosis of gearboxes. To solve this problem, this paper proposes an adaptive time-domain signal segmentation method that envelopes the original signal using a cubic spline interpolation. The peak values of the rail joint gap impacts are extracted to realize the adaptive segmentation of gearbox fault signals when the vehicle was moving at a uniform speed. A long-time and unsteady signal affected by wheel–rail impacts is segmented into multiple short-term, steady-state signals, which can suppress the high amplitude of the shock response signal. Finally, on this basis, multiple short-term sample signals are analyzed by time- and frequency-domain analyses and compared with the nonfaulty results. The results showed that the method can efficiently suppress the high-amplitude components of subway gearbox vibration signals and effectively extract the characteristics of weak faults due to uniform wear of the gearbox in the time and frequency domains. This provides reference value for the gearbox fault diagnosis in engineering practice.

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Study on Energy Consumption Analysis Method of Distributed Cryogenic Separation System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.732-733.52 ◽

2013 ◽

Vol 732-733 ◽

pp. 52-56

Author(s):

Zhi Guo Wang ◽

Lei Zhang ◽

Chai Ling Yin

Keyword(s):

Energy Use ◽

Exergy Analysis ◽

Waste Heat ◽

Engineering Practice ◽

Analysis Method ◽

Analysis Model ◽

Two Stage ◽

Separation Plant ◽

Flow Energy ◽

Saving Effect

Cryogenic separation method is the main method to recycle NGL (Natural Gas Liquid). Oilfield two-stage expansion NGL cryogenic separation plant is a complex system composed of varieties of material flow, energy flow and equipments, is a typical distributed energy use system composed of three parts, energy supply, energy use and waste heat recovery. In this paper, according to the process characteristics of two-stage expansion cryogenic separation plant, three-box analysis method was used, the system was compartmentalized into six subsystems, represented the exergy analysis model of system—unit—equipment, given the specific analysis process and the assessment rules for the NGL system. Using the practical operational data, the writers conduct the exergy analysis on the operational working condition of Daqing oilfield NGL system. Based on the calculation results, this paper raises some proposals to improve the operational efficiency, and achieved a good energy saving effect in engineering practice.

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Mechanical Model of Pelletization in the Impressing Roller System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.732-733.348 ◽

2013 ◽

Vol 732-733 ◽

pp. 348-351

Author(s):

Xiao Peng Huang ◽

Fang Xin Wan ◽

Jing Feng Wu

Keyword(s):

Research Result ◽

Reference Value ◽

Force Balance ◽

Total Force ◽

Force Analysis ◽

Forming Mechanism ◽

Material Layer ◽

Work Area ◽

Function Relationship ◽

Roller System

By the force analysis of alfalfa grass powder material layer in work area of circular mould pelletizing system, grass pellet briquetting mechanism when alfalfa grass powder pass work area was explained, function relationship between the thickness of material layer and the circular mould angle was established, force balance equation of material layer differentiation unit under the general conditions was deduced, and the total force of material layer applied by circular mould was obtained. Research result has practical meaning for guiding the process test of grass pellet product and optimizing product structure, and has a certain theoretical reference value for in-depth revealing granulating forming mechanism of hoop standard granulator.

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Safety Analysis Model of DUCG Based on FMEA/FTA

Volume 4: Nuclear Safety, Security, and Cyber Security; Computer Code Verification and Validation ◽

10.1115/icone26-81484 ◽

2018 ◽

Author(s):

Zhenxu Zhou ◽

Hao Nie ◽

Chunling Dong ◽

Qin Zhang

Keyword(s):

Failure Modes ◽

Fault Tree Analysis ◽

Safety Analysis ◽

Nuclear Industry ◽

Analysis Model ◽

Industrial Systems ◽

The Past ◽

Research Cycle ◽

Dynamic Uncertain Causality Graph ◽

Analytical Power

Failure Modes and Effects Analysis (FMEA) is a useful tool to find possible flaws, to reduce cost and to shorten research cycle in complex industrial systems. Fault Tree Analysis (FTA) has gained credibility over the past years, not only in nuclear industry, but also in other industries like aerospace, petrochemical, and weapon. Both FMEA and FTA are effective techniques in safety analysis, but there are still many uncertain factors in them that are not well addressed until now. This paper combines FMEA and FTA based on Dynamic Uncertain Causality Graph (DUCG) to solve this issue. Firstly, the FMEA model is mapped into a corresponding DUCG graph. Secondly, FTA model is mapped into a corresponding DUCG graph. Thirdly, combine the above DUCG graphs. Finally, users can modify the combined DUCG graph and calculations are made. This paper bridges the gap between FMEA and FTA by combining the two methods using DUCG. And additional modeling power and analytical power can be achieved with the advantages of the combined DUCG safety analysis model and its inference algorithm. This method can also promote the application of DUCG in the system reliability and safety analysis. An example is used to illustrate this method.

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THE STUDY OF SME’S PROFITABILITY AND ITS RELATION TO THE AVAILABILITY OF ELECTRICAL ENERGY IN TELUK WONDAMA REGENCY

Hasanuddin Economics and Business Review ◽

10.26487/hebr.v2i3.1460 ◽

2019 ◽

Vol 2 (3) ◽

pp. 173

Author(s):

Irawantho Irawantho ◽

Alimuddin Alimuddin ◽

Nursini Nursini

Keyword(s):

Small And Medium Enterprises ◽

Research Result ◽

Electrical Energy ◽

Regression Equation ◽

Primary Data ◽

Energy Costs ◽

Analysis Model ◽

The Government ◽

Medium Enterprises

This research aimed to investigate the effect of electrical energy costs, the business capital, and the total of the laborers on the profits of the Micro Small and Medium Enterprises in Teluk Wondama Regency.This research used the regression equation. The Objects of the study were Micro Small and Medium Enterprises who were business actors who were impacted doe to the establishment of the cooperation between the Government of Teluk Wondama Regency and PT. PLN in term of supply of the electrical energy. The data were collected using the technique of questionnaires distributed to 90 micro small and medium enterprises. The types of data used were the primary data. The analysis model used in this research was the multiple linear regression.The research result indicated that (1) The electrical costs had a positive and significant effect on the profits of SME in Teluk Wondama Regency; (2) The business capital had a positive and significant effect on the profits of SME in Teluk Wondama Regency; (3) The number of laborers had a positive and significant effect on the profits of SME in Teluk Wondama Regency. The roles of the three factors together had the effect of 46.5%, while the rest of about 53.5% was determined by other factors.

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Data-Driven Evaluation and Optimization of Agricultural Sustainable Development Capability: A Case Study of Northern Anhui

Processes ◽

10.3390/pr9112036 ◽

2021 ◽

Vol 9 (11) ◽

pp. 2036

Author(s):

Muchen Luo ◽

Fan Liu ◽

Jianqing Chen

Keyword(s):

Sustainable Development ◽

Environmental Pollution ◽

Utilization Efficiency ◽

Data Driven ◽

Data Envelopment Analysis Model ◽

Analysis Model ◽

Production Scale ◽

The Sustainable Development ◽

Agricultural Sustainable Development ◽

Sustainable Development Ability

Human survival depends on the sustainable development of agriculture. This study constructs a data-driven evaluation and optimization method of agricultural sustainable development capacity, aiming to better cope with challenges such as environmental pollution and excessive consumption of resources and energy, as well as improve agricultural economic level. Further, an evaluation index system was constructed based on comprehensive consideration of energy and resources utilization, environmental pollution, and agricultural economy. After simplifying and integrating the data, a data envelopment analysis model was constructed to quantitatively evaluate the capability for agricultural sustainable development and its changing trend. Moreover, its influencing factors were analyzed from the perspective of input, which provides accurate countermeasures for improving agricultural sustainable development ability, resource utilization efficiency, and process optimization. This study shows the realization process of the aforementioned method for the agricultural development of six cities in northern Anhui from 2010 to 2019. Our results suggest that the sustainable development ability of northern Anhui is weak, but overall, has a good development trend. Based on our results, some countermeasures were proposed to control production scale reasonably, reduce environmental load, and improve resource efficiency, which provides a reference for policymakers to guide and standardize the development of regional agriculture.

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Study on the Fracture Law of Inclined Hard Roof and Surrounding Rock Control of Mining Roadway in Longwall Mining Face

Energies ◽

10.3390/en13205344 ◽

2020 ◽

Vol 13 (20) ◽

pp. 5344

Author(s):

Feng Cui ◽

Shuai Dong ◽

Xingping Lai ◽

Jianqiang Chen ◽

Chong Jia ◽

...

Keyword(s):

Energy Release ◽

Longwall Mining ◽

Coal Pillar ◽

High Energy ◽

Mechanical Analysis ◽

Engineering Practice ◽

Analysis Model ◽

Hard Roof ◽

Working Face ◽

The Stability

In the inclination direction, the fracture law of a longwall face roof is very important for roadway control. Based on the W1123 working face mining of Kuangou coal mine, the roof structure, stress and energy characteristics of W1123 were studied by using mechanical analysis, model testing and engineering practice. The results show that when the width of W1123 is less than 162 m, the roof forms a rock beam structure in the inclined direction, the floor pressure is lower, the energy and frequency of microseismic (MS) events are at a low level, and the stability of the section coal pillar is better. When the width of W1123 increases to 172 m, the roof breaks along the inclined direction, forming a double-hinged structure, the floor pressure is increased, and the frequency and energy of MS events also increases. The roof gathers elastic energy release, and combined with the MS energy release speed it can be considered that the stability of the section coal pillar is better. As the width of W1123 increases to 184 m, the roof in the inclined direction breaks again, forming a multi-hinged stress arch structure, and the floor pressure increases again. MS high-energy events occur frequently, and are not conducive to the stability of the section coal pillar. Finally, through engineering practice we verified the stability of the section coal pillar when the width of W1123 was 172 m, which provides a basis for determining the width of the working face and section coal pillar under similar conditions.

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Dynamic Outsourcing Development for Sustainable Competitive Advantage in a High-Tech Backend Semiconductor Equipment Firm

Sustainability ◽

10.3390/su12010155 ◽

2019 ◽

Vol 12 (1) ◽

pp. 155

Author(s):

Hyun-Joon Jo ◽

Timothy Connerton ◽

Hyun-Jung Kim

Keyword(s):

Competitive Advantage ◽

Service Providers ◽

Research Result ◽

High Tech ◽

Sustainable Competitive Advantage ◽

Affecting Factors ◽

Ahp Method ◽

Analytic Hierarchy ◽

Affecting Factor ◽

Hierarchy Process

In a high-tech backend semiconductor business where a market environment changes sharply and requires competitiveness of high technology, one of the most important criteria is to establish an optimal strategy for outsourcing development so a firm can achieve a sustainable competitive advantage. Many studies have investigated sustainable and successful strategies for the selection and management of outsourcing suppliers, whereas, this study focuses mainly on analyzing the most affecting factor for outsourcing development in the perspective of dynamic capability by using the Delphi Analytic Hierarchy Process (AHP) method. For the analysis of affecting factors, 4 dimensions are defined: technology, organization, environment, and process. The research result shows that the sustainability of the productive skill in the technology dimension is adopted as the most affecting factor for outsourcing development among the defined 4 dimensions of an outsourcing supplier’s capability. With this research, a high-tech firm can measure the level of each dimension and each factor in developing outsourcing service providers. Then the firm can develop an appropriate outsourcing provider who contributes to the firm’s sustainable competitive advantage. This study also provides a practical and strategic framework of a high-tech firm’s outsourcing development in variable market situations and changeable conditions of transaction.

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Finite Element Failure Analysis of GFRP Laminates in Plate-Cone Reticulated Shell

Advances in Polymer Technology ◽

10.1155/2020/2809302 ◽

2020 ◽

Vol 2020 ◽

pp. 1-12

Author(s):

Xing Wang ◽

Yu Jiang ◽

Yonghui Huang ◽

Yue Huang ◽

Fan Wang

Keyword(s):

Failure Analysis ◽

Composite Laminates ◽

Strength Criterion ◽

Laminated Plates ◽

Engineering Practice ◽

Analysis Model ◽

Ansys Software ◽

Strength Failure ◽

New Type ◽

Element Failure

Plate-cone reticulated shell is a new type of spatial structures with good mechanical behavior, technical economy, and architectural appearance. In this paper, using ANSYS software, the strength failure analysis model of composite laminates is established in cooperation with the Strength Criterion of Hoffman. The effects of layer number, laying direction, and thickness of laminates on the ultimate strength of laminates are studied by detailed parametric analysis, which provides a theoretical basis for the design of composite plate-cone reticulated shell and GFRP laminated plates. Some important conclusions are obtained and can be applied to engineering practice.

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