scholarly journals Determination of parameters of mathematical model of quality assessment of surface waste treatment in urbanized territories

2019 ◽  
Vol 135 ◽  
pp. 01017
Author(s):  
Ekaterina Davydova ◽  
Arkadiy Kim ◽  
Alfiya Kapizova
Keyword(s):  
Mathematical Model ◽  
Wastewater Treatment ◽  
Waste Treatment ◽  
Surface Water Quality ◽  
Anthropogenic Pollutants ◽  
Wide Range ◽  
Optimal Technology ◽  
Determination Of Parameters ◽  
Selection Of

The publication presents the results of an analysis of the dynamics of changes in surface water quality in the Lower Volga basin based on the processing of statistical data on monitoring the degree of pollution over a long period. Significant all-season excesses of the maximum permissible norms for the concentration in water of a whole spectrum of background and anthropogenic pollutants were recorded. Deficiencies in the implementation of existing methods have been identified that make it possible to assess the dynamics of changes in the state of the ecosystem of the water basin and select the most significant parameters for constructing a mathematical model for choosing the most effective wastewater treatment technology.The aim of this work is to select and evaluate the input parameters of a mathematical model, the implementation of which will ensure the search for optimal technology and appropriate technical means of surface wastewater treatment. This research is based on a comprehensive assessment of a wide range of hydrochemical indicators of pollution of discharged wastewater in controlled sites using statistical methods for processing observational data. The most significant parameters have been identified that allow the formation of a conceptual model, and the degree of their influence on the selection of optimal means and methods of wastewater treatment has been determined.

Integration of Expert System Into a CAD System of Springs

1987 ◽  
Author(s):  
Yu Jin ◽  
Liu Shihua ◽  
Qin Jing ◽  
Zhou Ji
Keyword(s):  
Mathematical Model ◽  
Expert System ◽  
Optimal Design ◽  
Structure Characteristic ◽  
Cad System ◽  
System Technique ◽  
Characteristic Features ◽  
Determination Of Parameters ◽  
Selection Of

Abstract By combining the reasoning design of the expert system with the analysis and calculation of spring based on a mathematical model and its optimal design, an intelligent spring CAD system has been established. The expert system technique is adopted for such non-calculating designing steps as the selection of scheme, the determination of parameters as well as for the development of the technological process, thus greatly strengthening the original CAD system of springs. This paper provides a detailed description of the function, structure, characteristic features and significance of the said system.

scholarly journals Assessment of the competitiveness of catering companies

2020 ◽  
Vol 23 (9) ◽  
pp. 77-85
Author(s):  
Nataliia Kyrnis
Keyword(s):  
High Tech ◽  
Internal Factors ◽  
Approach Method ◽  
Methodological Approaches ◽  
Determination Of Parameters ◽  
Post Industrial ◽  
Optimal Evaluation ◽  
Selection Of

Modernization of the Ukrainian economy under the influence of global post-industrial trends mainstreams the priority of development of science-intensive, high-tech, innovative activities. Modernization creates the preconditions for strengthening competitive positions in the national and global markets. In modern conditions, the issue of assessing the competitiveness of catering companies is relevant. High competitiveness of the enterprise is the main condition of its activity and development. The purpose of the study is to assess the competitiveness of catering companies in the market of catering services in Ukraine. The study proposes methodological approaches to assessing the competitiveness of catering companies. Methodological approaches include continuity of monitoring, determination of parameters, indicators and criteria, selection of optimal evaluation methods. In the process of research the following methods were used: sociological survey, simple ranking, integrated assessment and factor method, system approach method. It was established that methodical approaches to assessing the competitiveness of catering companies include justification and development of a system of socio-economic indicators and criteria (product quality, quality of service, quality and organizational staff, efficiency, efficiency of personnel management, price). Methodological approaches include a set of indicators that form an integrated indicator of competitiveness. This indicator allows to consider objective differences in the dynamics of enterprises, the conditions of use of available resources in the process of forecasting and development of enterprises. A comprehensive diagnosis was carried out based on an integrated indicator of the competitiveness of restaurants on special orders (catering), during which it was determined that its level has a significant differentiation according to the indicators of the studied enterprises, which are due to both external and internal factors, which allows the development of strategic priorities and specific measures to develop the image of the enterprise and increase its competitiveness.

Design of facultative ponds based on uncertainty analysis

1996 ◽  
Vol 33 (7) ◽  
pp. 41-47 ◽  
Author(s):  
Marcos von Sperling
Keyword(s):  
Sensitivity Analysis ◽  
Monte Carlo ◽  
Wastewater Treatment ◽  
Uncertainty Analysis ◽  
Accurate Determination ◽  
Effluent Quality ◽  
Uniform Distributions ◽  
Wastewater Treatment Systems ◽  
Selection Of

The paper presents a methodology for the utilisation of the Uncertainty analysis based on Monte Carlo simulations for the design of wastewater treatment systems. The special and important case of facultative-ponds design is exemplified. The design is carried out a large number of times, each run with different values of the inputs, randomly selected from uniform distributions within ranges which define the designer's uncertainty with the data. The results are interpreted statistically, giving elements for the selection of more or less conservative designs, according to the resulting effluent quality. The procedure for undertaking a Sensitivity Analysis is also described and exemplified, allowing the designer to concentrate more efforts on a more accurate determination of those inputs found to be significantly important.

The Application of Petroleum Geochemical Methods to Production Allocation of Commingled Fluids

2021 ◽  
Author(s):  
Richard Patience ◽  
Mark Bastow ◽  
Martin Fowler ◽  
Julian Moore ◽  
Craig Barrie
Keyword(s):  
Best Practice ◽  
Statistical Treatment ◽  
Laboratory Analysis ◽  
Chemical Compositions ◽  
Production Allocation ◽  
Wide Range ◽  
Operational Activity ◽  
End Members ◽  
Selection Of

Abstract Production allocation from petroleum geochemistry is defined here as the quantitative determination of the amount or portion of a commingled fluid to be assigned to two or more individual fluid sources (e.g., a pipeline, field, reservoir, well) at a particular moment in time, based on the fluid chemistry. It requires: i) knowledge of the original chemical compositions of each of the fluids prior to mixing (referred to here as the "end members"), and ii) that statistically valid differences in their chemistries can be identified. Petroleum geochemical-based methods for production monitoring and allocation are much lower cost than using production logging tools, as there is no additional rig time or extra personnel required at the well site. Additionally, no intervention to the production of hydrocarbons from a well is required and, hence, there is none of the risk entailed in additional operational activity. Geochemical methods are applicable to a wide range of fields, irrespective of pressure, temperature, reservoir quality and reservoir fluid type. The method has been in existence for over 30 years, during which time a number of different analytical methods, data pre-processing and treatment approaches have been applied. This paper summarises these approaches, and provides examples, but also describes a "best practice" which is not a "one size fits all" approach, as is sometimes seen in the literature. A successful production allocation study consists of the following steps: i) Selection of end member samples that contribute to the commingled production fluid; ii) Determination of the differences in chemical composition of the end members through laboratory analysis of the end members (e.g. by WO-GC), replicate analyses of samples and statistical treatment of the data (e.g. PCA); iii) If statistically significant differences exist, laboratory analysis of the end members and commingled fluids with appropriate replicate analyses of samples; iv) Data selection, pre-processing (e.g. selection of ratios or concentrations of components); v) Determination of end member contributions by solving equations (e.g. least squares best fit) and uncertainty estimation (e.g. Monte Carlo or Bootstrap methods). The differences in approach for conventional versus unconventional plays are also discussed.

Optimization Design of Single Steering Trapezoid Mechanism of Vehicle Based on MATLAB

2012 ◽  
Vol 490-495 ◽  
pp. 2499-2504
Author(s):  
Ai Hua Ren ◽  
Chuan Qiong Sun
Keyword(s):  
Mathematical Model ◽  
Sensitivity Analysis ◽  
Optimization Design ◽  
Research Direction ◽  
Selection Of Variables ◽  
Analysis Of Results ◽  
Actual Operation ◽  
Matlab Programming ◽  
Selection Of

Firstly the optimum mathematical model of single steering trapezoid mechanism of vehicle was established gradually through selection of variables, setting constraints, determination of objective function. And then the optimum calculation is carried out with MATLAB programming in the case of EQ1092, and the problem occurring in actual operation that the optimum results changed with initial points was solved. In the end the further optimum research direction of this mechanism was intuitively pointed out through visualization and sensitivity analysis of results.

DISTANCE MEASUREMENTS USING FREQUENCY STABILIZED Nd:YAG LASERS

1996 ◽  
Vol 05 (03) ◽  
pp. 543-550
Author(s):  
VERED MAHAL ◽  
ADY ARIE
Keyword(s):  
Frequency Stability ◽  
Precise Determination ◽  
Phase Shifting ◽  
Distance Measurements ◽  
Fringe Contrast ◽  
Nd:Yag Lasers ◽  
Wide Range ◽  
Diode Pumped ◽  
Selection Of

Two diode-pumped tunable Nd:YAG lasers locked to sub-Doppler transitions of 127I2 and 133 Cs 2 are used as a source for two-wavelength interferometry. The synthetic wavelength, Λ=c/∆ν, is highly stable and accurate, owing to the frequency stability of the locked lasers and the precise determination of the frequency difference Δν between Cs 2 and I 2 transitions. The dense spectra of these molecules allows selection of Λ over a wide range, between 8.5 mm and several meters, thus enabling distance measurements with a large non-ambiguity range. Fringe contrast and phase-shifting methods are used to measure the phase difference. An accuracy of 70 μm is achieved for Λ~19 mm, i.e. Λ/260.

Influence of SLS processing parameters according to the new mathematical model on flexural properties

2016 ◽  
Vol 22 (2) ◽  
pp. 258-268 ◽  
Author(s):  
Ana Pilipović ◽  
Bogdan Valentan ◽  
Mladen Šercer
Keyword(s):  
Mathematical Model ◽  
Selective Laser Sintering ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Flexural Properties ◽  
Content Type ◽  
Manufacturing Procedure ◽  
Fabrication Parameters ◽  
Selection Of

Purpose The purpose of this paper is the selection of production parameters in selective laser sintering – SLS for the production of quality products (e.g. good mechanical properties). The manufacturing procedure affects the properties, which is especially significant in additive procedures, as the products are not cheap and the procedure and material need to be optimally selected. Design/methodology/approach The paper presents an analysis of the fabrication parameters in selective laser sintering (SLS) that affect the flexural properties of the finished product. Findings The influence of a new parameter has been found, the overlay ratio, and using the mathematical and scheme method, the selection of parameters for obtaining the optimal flexural properties has been proposed. Originality/value The paper presents a new mathematical model for the calculation of the processing parameters in SLS of polymer products and gives a diagram for the determination of which parameters are the best to use for practical purposes.

scholarly journals Perancangan Aplikasi Tes IQ Siswa untuk Pertimbangan Pemilihan Jurusan dengan Metode Forward Chaining

2016 ◽  
Vol 3 (2) ◽  
pp. 102
Author(s):  
Ahyuna Ahyuna ◽  
Irmawati Irmawati
Keyword(s):  
Measuring Instruments ◽  
Measuring Devices ◽  
Iq Test ◽  
Wide Range ◽  
Computer Based ◽  
White Box Testing ◽  
Necessary Existence ◽  
Selection Of ◽  
Iq Tests

IQ merupakan pengelompokan kecerdasan manusia, untuk mengetahui kecerdasan seseorang berbagai macam alat ukur yang digunakan diantaranya adalah tes inteligensi, tes emosional, tes spiritual, psikotes dan alat ukur lainnya. Semakin tinggi semangat orang untuk meraih sukses, semakin tinggi pula kebutuhan akan modal intelektual, emosional, psikologis, minat dan bakat. Segala kemampuan tersebut bisa jadi merupakan bakat terpendam dalam diri yang belum tergali, ataupun bakat yang harus dimunculkan dengan berbagai latihan. Tes IQ dalam penentuan dan pertimbangan pemilihan jurusan pada sekolah biasanya dilakukan secara manual dan membutuhkan waktu yang cukup banyak untuk mengetahui hasil IQ dalam penentuan pemilihan jurusan, selain itu banyak peserta tes sulit memahami untuk menghitung hasil tes IQ karena cukup rumit sehingga untuk mempermudah pihak sekolah dalam melaksanakan tes IQ penentuan jurusan maka diperlukan adanya suatu aplikasi yang berbasis komputer dan untuk membangun aplikasi yang akan digunakan bahasa pemrograman serta metode pengujian white box. Hasil evaluasi terhadap aplikasi yang dibangun sangat membantu serta mempercepat pihak sekolah dalam penentuan jurusan dan tepat dalam penentuan jurusan siswa yang disesuaikan kemampuan mereka serta membudayakan pemakaian komputer di kalangan siswa.IQ is a grouping of human intelligence, to determine a person's intellect wide range of measuring instruments used include intelligence tests, tests of emotional, spiritual tests, psychological and other measuring devices. The higher the spirit of people to achieve success, the higher the need for intellectual capital, emotional, psychological, interests and talents. All these capabilities can be a hidden talent within untapped, or talent that should be raised with the various exercises. IQ tests in the determination and consideration of election department at school is usually done manually and requires considerable time to know the results of IQ in determining the selection of majors, besides many test-takers is difficult to understand to calculate the results of an IQ test because it is quite complicated so as to facilitate the school in IQ tests determining the department implement the necessary existence of a computer-based applications and to build applications that will use the programming language as well as white-box testing methods. Results of evaluation of the applications that are built very helpful as well as accelerate the schools in the determination of the exact majors and students majoring in determining adjusted their abilities and cultivate the use of computers among students.

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