Determination of the minimum number of technological bases of a part

2020 ◽  
pp. 73-75
Author(s):  
B.M. Bazrov ◽  
T.M. Gaynutdinov
Keyword(s):  
Cost Price ◽  
Labor Input ◽  
Part Surface ◽  
Technological Base ◽  
Size Accuracy ◽  
Minimum Number ◽  
The Cost ◽  
Input Cost ◽  
Selection Of

The selection of technological bases is considered before the choice of the type of billet and the development of the route of the technological process. A technique is proposed for selecting the minimum number of sets of technological bases according to the criterion of equality in the cost price of manufacturing the part according to the principle of unity and combination of bases at this stage. Keywords: part, surface, coordinating size, accuracy, design and technological base, labor input, cost price. [email protected]

Parametric Optimization of Structures Under Combined Base Motion Direct Forces and Static Loading

1998 ◽  
Vol 124 (1) ◽  
pp. 132-140 ◽  
Author(s):  
Izhak Bucher
Keyword(s):  
Degrees Of Freedom ◽  
Structural Parameters ◽  
Operating Conditions ◽  
Design Parameters ◽  
Power Spectral ◽  
Loading Patterns ◽  
The Cost ◽  
Selection Of ◽  
Eigenvectors And Eigenvalues

This paper deals with the optimization of vibrating structures as a mean for minimizing unwanted vibration. Presented in this work is a method for automatic determination of a set of preselected design parameters affecting the geometrical layout or shape of the structure. The parameters are selected to minimize the dynamic response to external forcing or base motion. The presented method adjusts the structural parameters by solving an optimization problem in which the constraints are dictated by engineering considerations. Several constraints are defined so that the static deflection, the stress levels and the total weight of the structure are kept within bounds. The dynamic loading acting upon the structure is described in this work by its power spectral density, with this representation the structure can be tailored to specific operating conditions. The uncertain nature of the excitation is overcome by combining all possible spectra into one PSD encompassing all possible loading patterns. An important feature of the presented method is its numerical efficiency. This feature is essential for any reasonably sized problem as such problems are usually described by thousands of degrees of freedom arising from a finite-element idealization of the structure. In this paper, efficient, closed form expressions, for the cost function and its gradients are derived. Those are computed with a partial set of eigenvectors and eigenvalues thus increasing the efficiency further. Several numerical examples are presented where both shape optimization and the selection of discrete components are illustrated.

scholarly journals The Method of Prime Costs Determination of the Model Row Goods

2008 ◽  
Vol 13 (3) ◽  
pp. 325-330
Author(s):  
A. S. Barashkov ◽  
D. S. Petrosian
Keyword(s):  
Cost Price ◽  
Price Determination ◽  
Initial Information ◽  
The Cost

The concept of the model row goods is introduced. These are the interchangeable goods differing by quality and price. Cognacs of various vintage years produced on one cognac factory are a typical example of such goods. For the indicated kind of the goods the method of the cost price determination of the goods of competitors is worked out and realized. The initial information for determination is the data on the prices of the goods and sales volumes.

scholarly journals AJUSTE DA EQUAÇÃO DE HAZEN-WILLIANS PARA DETERMINAÇÃO DA PERDA DE CARGA CONTÍNUA EM TUBULAÇÕES DE PVC

Irriga ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 94-100
Author(s):  
EUGENIO PACELI MIRANDA ◽  
TATIANA BELO DE SOUSA CUSTODIO ◽  
FRANCISCO UCHOA de LIMA ◽  
TAIANE ALMEIDA Pereira ◽  
ANDRE LUIZ RIBEIRO BICUDO
Keyword(s):  
Mean Absolute Error ◽  
Absolute Error ◽  
Head Loss ◽  
Fundamental Parameter ◽  
Pumping System ◽  
Pvc Pipe ◽  
The Cost ◽  
E Mail ◽  
Selection Of

AJUSTE DA EQUAÇÃO DE HAZEN-WILLIANS PARA DETERMINAÇÃO DA PERDA DE CARGA CONTÍNUA EM TUBULAÇÕES DE PVC     EUGENIO PACELI MIRANDA1; TATIANA BELO DE SOUSA CUSTODIO2; FRANCISCO UCHOA DE LIMA3; TAIANE ALMENDA PEREIRA4 E ANDRE LUIZ RIBEIRO BICUDO5   1Professor, Doutor IFCE, Campus Iguatu/CE, Rua Plácido Almino Uchoa, 60, Iguatu/Ceará. CEP: 63.500-000, Brasil, email:[email protected]; 2 Tecnólogo em Irrigação e Drenagem, IFCE, Campus Iguatu, Rodovia Iguatu-Várzea Alegre km 05, CEP: 63.500-000, Brasil, email: [email protected]; 3Graduando em Tecnologia em Irrigação e Drenagem, IFCE, Campus Iguatu, Rodovia Iguatu-Várzea Alegre km 05, CEP: 63.500-000, Brasil, e-mail: [email protected]; 4Graduandos em Tecnologia em Irrigação e Drenagem, IFCE, Campus Iguatu, Rodovia Iguatu-Várzea Alegre km 05, CEP: 63.500-000, Brasil, e-mail: [email protected]; 5 Prof. do Colégio Técnico Industrial "Prof. Isaac Portal Roldan", Unesp, Campus Bauru. Av. Eng. Luis Edmundo Carrijo Coube, 14-01, CEP: 17.033-360, Brasil, e-mail: [email protected]     1 RESUMO   A perda de carga é um parâmetro fundamental para o dimensionamento das tubulações, estando diretamente relacionada ao custo dessas tubulações, a seleção do sistema de bombeamento e o custo com o consumo de energia elétrica. Nesse estudo ajustou-se a equação de Hazen-Willians e comparou com a equação de Darcy-Weisbach. O desempenho da equação ajustada foi determinada pelo índice de concordância (c), Erro Padrão Estatístico (EPE) e o Erro Absoluto Médio (EAM). Os resultados mostram que todos os índices usados para verificar o desempenho da equação de Hazen-Willians ajustada melhoraram. A maior diferença entre os valores da perda de carga contínua entre o método de Darcy-Weisbach e a equação de Hazen-Willians ajustada ficou em torno de 0,08%, valor que pode ser considerado extremamente baixo.   Palavras-chave: Perda de carga, Darcy- Weisbach, diâmetro.     MIRANDA, E. P; CUSTODIO, T. B. S; LIMA, F. U; PEREIRA, T. A.; BICUDO, A. L. R. ADJUSTMENT OF THE HAZEN-WILLIANS EQUATION FOR DETERMINATION OF CONTINUOUS PRESSURE DROP IN PVC PIPE     2 ABSTRACT   The head loss is a fundamental parameter for the dimensioning of the pipes, being directly related to the cost of these pipes, the selection of the pumping system and the energy cost of electricity. That study fitted the Hazen-Williams equation and compared it with the Darcy-Weisbach equation. The performance of the adjusted equation was determined by the concordance index (c), Statistical Standard Error (EPE) and Mean Absolute Error (EAM). The results show that all gridded indices to verify the performance of the adjusted Hazen-Willians equation have improved. The largest difference between the values of continuous load loss between the Darcy-Weisbach method and the adjusted Hazen-Williams equation was about 0.08%, which can be considered extremely low   Keywords: Head loss, Darcy-Weisbach, diameter.

scholarly journals Error Propagation as a Factor in Selection of Measurement Intervals for the Determination of Polycyclic Aromatic Hydrocarbons by Second-Derivative Spectrofluorimetry

2000 ◽  
Vol 83 (4) ◽  
pp. 977-984 ◽  
Author(s):  
Áurea Andrade Eiroa ◽  
Esther Vázquez Blanco ◽  
Purificación López Mahía ◽  
Soledad Muniategui Lorenzo ◽  
Darío Prada Rodríguez ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Error Propagation ◽  
Complex Mixtures ◽  
Second Derivative ◽  
Polycyclic Aromatic ◽  
Minimum Number ◽  
Analytical Result ◽  
Selection Of

Abstract The most suitable wavelength intervals were selected for the determination of 4 polycyclic aromatic hydrocarbons (PAHs; benzo[g,h,i]perylene, dibenzo[a,h]anthracene, pyrene, and triphenylene) in very complex mixtures of 11 PAHs: anthracene, benz[a]anthracene, benzo[a]pyrene, benzo[b]fluoranthene, benzo[g,h,i]perylene, benzo[k]fluoranthene, chrysene, dibenz[a,h]anthracene, phenanthrene, pyrene, and triphenylene. The multiple linear regression algorithm was applied to measurements made in several wavelength intervals previously selected on the basis of sensitivity and minimum number of interfering compounds. Of the different models obtained, those displaying minimum error propagation in the analytical result were selected. By applying the models proposed in this study, we precisely and accurately determined benzo[g,h,i]perylene, dibenz[a,h]anthracene, pyrene, and triphenylene in complex mixtures—a feat that could not be achieved by the use of constant-wavelength spectrofluorimetry in combination with second-derivative techniques.

The Application of Value Engineering in Budget Boftware Selection of Universities’ Cost Major in Western Areas of Chongqing

2014 ◽  
Vol 926-930 ◽  
pp. 3996-3999
Author(s):  
Xiao Feng Fu
Keyword(s):  
Cost Effective ◽  
Construction Cost ◽  
Value Engineering ◽  
Functional Evaluation ◽  
Project Cost ◽  
Cost Coefficient ◽  
Solid Foundation ◽  
The Cost ◽  
Selection Of

With the popularity of computerization in project cost industry, it has become one of the necessary professional skills for project cost personnel to be familiar with series of project cost software. To choose and buy targeted budget software in a college construction cost major can help lay a solid foundation for the students before work. Considering the current situation of budget software of the universities cost major in western areas of Chongqing, we can select the cost-effective budget software through the determination of functional evaluation coefficient, cost coefficient and value coefficient by introducing value engineering.

scholarly journals MARKETING PENDIDIKAN ISLAM DALAM KONTEKS INDUSTRIALISASI

2017 ◽  
Vol 4 (2) ◽  
pp. 278-289
Author(s):  
Syafrawi Syafrawi
Keyword(s):  
Economic Consideration ◽  
Economic Activities ◽  
Cost Of Transport ◽  
Skill Levels ◽  
Industrial Sites ◽  
The Earth ◽  
The Cost ◽  
Resource Factor ◽  
Selection Of

The determination of an industrial location is determined by three factors, namely; first, the cost of transport. Second, labor, and third, deglomeration. Variations of the motive, having the same estuary is the achievement of a profitable business destination for the producers. A more comprehensive understanding, that the selection of industrial sites is determined by several factors, among others: first, endowment factors or known as natural resources and energy contained on the surface of the earth and contained therein. Second, the human resource factor. This factor becomes an option for producers by measuring the level of availability of large manpower and skill levels. Third, the capital factor, both physical and non-physical. Fourth, market and price factors. Fifth, agglomeration factor. This factor indicates the situation of centralizing economic activities in certain locations, particularly the center of agglomeration placed at one of the points with the lowest transportation costs. Sixth, the factor of government policy. The choice of location because of this factor became an alternative for producers to maintain and develop their industry although initially it was not profitable, but because of the motive of existence and protection of its industry, the economic consideration was temporarily suspended.

Methods of Justification and Selection of Technologies for Remediation of Oil-contaminated Land

2021 ◽  
Vol 25 (6) ◽  
pp. 38-43
Author(s):  
O.G. Apulu ◽  
I.M. Potravny ◽  
I.V. Sukhorukova
Keyword(s):  
Petroleum Products ◽  
Economic Feasibility ◽  
Environmental Damage ◽  
Contaminated Land ◽  
Damage Compensation ◽  
Environmental Criteria ◽  
Technology And Assessment ◽  
The Cost ◽  
Selection Of

The results of research on the ecological and economic justification of the choice of technologies for the reclamation of oil-contaminated land are proposed. Economic and environmental criteria for the selection of technologies for the treatment of land contaminated with petroleum products are proposed. The algorithm of implementation of the project of recultivation of the lands polluted by oil is considered, which includes an assessment of environmental damage, compensation of losses to landowners, determination of the cost of work on recultivation of the polluted lands, justification of technology and assessment of efficiency of its application. Based on a comparative assessment of the use of various technologies for cleaning up oil-contaminated land according to the proposed criteria, the economic feasibility of using biotechnologies are shown on the example of the elimination of an emergency oil spill in the Niger Delta.

scholarly journals A Covering and protection Type Porthole Die For Semi-Hollow Al-Profiles

2021 ◽  
Vol 2076 (1) ◽  
pp. 012064
Author(s):  
Peng Yun ◽  
Haohua Fu ◽  
Chuhao Zhou ◽  
Rurong Deng
Keyword(s):  
Surface Brightness ◽  
Production Efficiency ◽  
Structure Design ◽  
Actual Case ◽  
Porthole Die ◽  
Die Life ◽  
Die Structure ◽  
The Cost ◽  
Selection Of

Abstract A new structure named covering type for the semi-hollow Al-profiles was present. through a common actual case, the determination of structure parameters was introduced in detail. Mainly including the arrangement of portholes, the structure design of chamber and the selection of bearing. The method of checking the die strength was introduced. According to the extrusion results, the structure of the traditional solid die and the covering type structure were compared. The characteristics of the latter structure were simple and easy to process. The practical application shows that the new die structure can enhance the die life, improve the production efficiency and reduce the cost. The high precision and the surface brightness of the profiles were obtained. The structure is worth promoting. The aim is to provide reliable data and reference for the further research and development on the structure for semi-hollow Al-profiles.

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