scholarly journals Оптимізація планів експериментів в умовах обмежених матеріальних та часових ресурсів

2015 ◽  
pp. 124-131
Author(s):  
О. М. Костенко
Keyword(s):  
Experimental Research ◽  
Construction Method ◽  
Optimization Techniques ◽  
Composite Construction ◽  
Technical Problems ◽  
Technological Processes ◽  
Time Costs ◽  
Serial Sequences ◽  
Dynamic Objects ◽  
Multifactorial Experiment

Стаття присвячена вирішенню науково-технічноїпроблеми зменшення матеріальних і часових витратпід час реалізації експериментальних досліджень зарахунок розробки та впровадження методів синтезуоптимальних планів експериментів в умовах обме-жених матеріальних і часових ресурсів. Розробленаметодологія включає в собі методи оптимізації завартісними і часовими витратами планів експеримен-ту: оснований на використанні типових серійних по-слідовностей планів багатофакторного експеримен-ту, композиційний метод побудови планів, близькихдо оптимальних, побудови каталогу типових планів,ітераційного планування експериментів, послідовногопланування експериментів, ідентифікації динамічнихоб’єктів на основі ітераційного планування. Методо-логія пройшла апробацію під час дослідження низкитехнологічних процесів, приладів і систем. The article is devoted of solving scientific and technical problems of reduce material and time costs in  implementing experimental research through the development and implementation of methods for the synthesis of optimal plans experiments in conditions of limited material and time resources. The developed methodology includes optimization techniques for cost and time-consuming experiment plans: based on the use of standard serial sequences of plans of multifactorial experiment, composite construction method of plans which are close to optimal, building a catalog of tipical plans, iterative experiments planning, serial planning experiments, identification of dynamic objects on the basis of iterative planning. The methodology has been tested in the study of some technological processes, devices and systems.

Improving Technological Processes for Borehole Drilling in Construction Using Vibration Impact

2015 ◽  
Vol 725-726 ◽  
pp. 220-225 ◽  
Author(s):  
Vladimir Verstov ◽  
Antonina Judina
Keyword(s):  
Experimental Research ◽  
High Power ◽  
Static Force ◽  
Technological Processes ◽  
Vibration Impact ◽  
Wide Scale ◽  
Vibration Technology ◽  
Borehole Drilling ◽  
Impact Vibration

In this article generalized results of the analysis theoretical and experimental research are presented, as well as the data on the wide-scale implementation of vibration technology for drilling boreholes for various construction purposes. Applying various types of vibration or impact vibration onto a pipe extracted from the ground allows significant decreasing of the static force, thus making it possible to avoid using high-power hoisting equipment (cranes or hydraulic hoisting jacks), avoid damaging the pipe in the process, as well as significantly decrease the costs and improve productivity. We present the data on construction processes whose efficiency can be significantly improved by using vibration on some working organs used during drilling boreholes for various construction purposes.

scholarly journals Swarm Intelligence-Based Smart Energy Allocation Strategy for Charging Stations of Plug-In Hybrid Electric Vehicles

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Imran Rahman ◽  
Pandian M. Vasant ◽  
Balbir Singh Mahinder Singh ◽  
M. Abdullah-Al-Wadud
Keyword(s):  
Electric Vehicles ◽  
Hybrid Electric Vehicles ◽  
Optimization Techniques ◽  
Allocation Strategy ◽  
Technical Problems ◽  
Highly Nonlinear ◽  
Battery Capacity ◽  
Smart Charging ◽  
Hybrid Electric ◽  
Charging Stations

Recent researches towards the use of green technologies to reduce pollution and higher penetration of renewable energy sources in the transportation sector have been gaining popularity. In this wake, extensive participation of plug-in hybrid electric vehicles (PHEVs) requires adequate charging allocation strategy using a combination of smart grid systems and smart charging infrastructures. Daytime charging stations will be needed for daily usage of PHEVs due to the limited all-electric range. Intelligent energy management is an important issue which has already drawn much attention of researchers. Most of these works require formulation of mathematical models with extensive use of computational intelligence-based optimization techniques to solve many technical problems. In this paper, gravitational search algorithm (GSA) has been applied and compared with another member of swarm family, particle swarm optimization (PSO), considering constraints such as energy price, remaining battery capacity, and remaining charging time. Simulation results obtained for maximizing the highly nonlinear objective function evaluate the performance of both techniques in terms of best fitness.

scholarly journals EXPERIMENTAL RESEARCH STANDS FOR TECHNOLOGICAL PROCESSES MECHANICAL TECHNICIPALES DETAIL ON A LATHE

2019 ◽  
pp. 594-598
Author(s):  
B.S. Turusbekov ◽  
Ih.Sh. Kadyrov
Keyword(s):  
Experimental Research ◽  
Experimental Work ◽  
Feed Rate ◽  
Cutting Forces ◽  
Cutting Speed ◽  
Electrical Signals ◽  
Technological Processes ◽  
Measuring Tool ◽  
Tool Cutting

The article presents circuit diagrams and photos of the stands for removing calibration characteristics of a symmetric sensor for measuring three co-referenced cutting forces Pz -tangential, Py - radial and P0 - axial cutting forces as well as induction ones for measuring tool feed rate with corresponding converters of these parameters into electrical signals [1, 2, 3]. Detailed descriptions of the stands, principles of their work, methods of conducting experiments are given. It should be noted that the presented stands can be used not only to remove the calibration characteristics of the above mentioned sensors, but also to carry out experimental work on the study of cutting forces depending on the feed of the tool, cutting speed on the first stand, and the second - all the necessary characteristics of the hydrosuperport: adjustment, static and dynamic.

Design for Experiment Device for Abrasive Flow Machining Based on Pro/E and ANSYA

2011 ◽  
Vol 197-198 ◽  
pp. 69-73 ◽  
Author(s):  
Wei Na Liu ◽  
Shi Min Xie ◽  
Li Feng Yang ◽  
Lei Zhao
Keyword(s):  
Mechanical Properties ◽  
Internal Structure ◽  
Experimental Research ◽  
Irregular Surface ◽  
Test Device ◽  
Cutting Mechanism ◽  
Technical Problems ◽  
Abrasive Flow Machining ◽  
Ansys Analysis ◽  
Test Requirements

Abrasive flow machining (AFM) is an effective way to the irregular surface and internal structure of parts polished, debarred, filleted finish machining and so on. Presently abrasive flow machining is primarily applied for aviation, aero-plane in China, but it hasn’t been used widely. Because there are still many technical problems to be solved, such as: the studies on AFM equipment, preparation of abrasive and cutting mechanism. In order to further improvement of AFM technology, a lot of experimental research should be done. In this paper, by Pro/E design for the experimental device, and by ANSYS analysis of mechanical properties, and finally the test device can be verified to meet the test requirements, and achieve the test successfully.

scholarly journals ENTERPRISE DIGITAL TWIN – INSTRUMENT OF DIGITALIZATION THE ACTIVITY OF THE ORGANIZATION

2019 ◽  
Vol 2019 (2) ◽  
pp. 11-17
Author(s):  
Кирилл Пономарев ◽  
Kirill Ponomarev ◽  
Александр Феофанов ◽  
Aleksandr Feofanov ◽  
Татьяна Грuшина ◽  
...  
Keyword(s):  
Technological Process ◽  
Industry 4.0 ◽  
Physical Object ◽  
Digital Form ◽  
Digital Twin ◽  
Technological Processes ◽  
Time Costs ◽  
Comprehensive Information ◽  
New Models ◽  
Geographically Distributed

Currently, the strategies of Industry 4.0 are increasingly used in all areas of industry and economy. One of the tools of Industry 4.0. is a digital twin of the enterprise. The digital twin is a virtual representation of a physical object that takes into account all changes that occur with this object, registers and displays in digital form the structure of the object in accordance with these changes. The digital twin increases the efficiency of interaction between geographically distributed workshops or enterprises, creates prerequisites for the introduction of technologies of unmanned production. With regard to the technological process, the digital twin, receiving information from sensors located on the technological lines of the enterprise, by processing and analyzing it, provides authorized employees comprehensive information about current enterprise situation. Introduction of the concept of a digital twin allows you to increase the safety of the entire organization, reduce the financial and time costs for developing new models of technological processes, to achieve the most rational decisions of multi-criteria tasks in production.In the conditions of widespread digitalization and automation, the introduction of digital twin technologies is an important step towards the development of the enterprise, preservation and increase of its influence in the market.

Improving RGB-D SLAM in dynamic environments using semantic aided segmentation

Robotica ◽  
2021 ◽  
pp. 1-26
Author(s):  
Lhilo Kenye ◽  
Rahul Kala
Keyword(s):  
Search Algorithm ◽  
Dynamic Environment ◽  
Optimization Techniques ◽  
Working Environment ◽  
Binary Mask ◽  
Localization And Mapping ◽  
Dynamic Objects ◽  
Slam Algorithm ◽  
Indoor And Outdoor Environments ◽  
Static Background

Summary Most conventional simultaneous localization and mapping (SLAM) approaches assume the working environment to be static. In a highly dynamic environment, this assumption divulges the impediments of a SLAM algorithm that lack modules that distinctively attend to dynamic objects despite the inclusion of optimization techniques. This work exploits such environments and reduces the effects of dynamic objects in a SLAM algorithm by separating features belonging to dynamic objects and static background using a generated binary mask image. While the features belonging to the static region are used for performing SLAM, the features belonging to non-static segments are reused instead of being eliminated. The approach employs deep neural network or DNN-based object detection module to obtain bounding boxes and then generates a lower resolution binary mask image using depth-first search algorithm over the detected semantics, characterizing the segmentation of the foreground from the static background. In addition, the features belonging to dynamic objects are tracked into consecutive frames to obtain better masking consistency. The proposed approach is tested on both publicly available dataset as well as self-collected dataset, which includes both indoor and outdoor environments. The experimental results show that the removal of features belonging to dynamic objects for a SLAM algorithm can significantly improve the overall output in a dynamic scene.

scholarly journals Перечисление типовых планов многофакторного эксперимента

2013 ◽  
pp. 146-150
Author(s):  
Е. М. Костенко
Keyword(s):  
Serial Sequences ◽  
Multifactorial Experiment

Запропоновано метод перерахування типових оптимальних планів БФЕ, заснований на поданні планів БФЕ у вигляді серійних послідовностей. Розглянуто рішення поетапних задач методу. Досліджено властивості серійних послідовностей планів БФЕ, отримані оцінки їхньої кількості, описана процедура формування множини базових серійних послідовностей і типових варіантів структур планів БФЕ. Наведено приклади каталогів оптимальних планів БФЕ. Застосування запропонованого методу дасть змогу спростити процес вибору мінімальних планів БФЕ для великої кількості факторів. The method of multifactorial experiment of typical plans enumeration, based on representation of MFE plans in the form of serial sequences is offered. The decision of stage-by-stage problems of the method is considered. Properties of plans of MFE serial sequences are investigated, estimations of their quantity are received, and procedure of base serial sequences set formation and typical variants of plans of MFE structures is described. Examples of optimum plans of MFE catalogues are resulted. Application of the offered method will allow to simplify the process of choice of minimal plans of MFE for a plenty of factors.

X-Ray Analysis of Frozen Hydrated Sections:The Unconventional Approach

1982 ◽  
Vol 40 ◽  
pp. 754-757
Author(s):  
R. Beeuwkes ◽  
A. Saubermann ◽  
P. Echlin ◽  
S. Churchill
Keyword(s):  
Ratio Method ◽  
Frozen Sections ◽  
Technical Problems ◽  
Sample Handling ◽  
X Ray ◽  
Common Group ◽  
Ideal Method ◽  
Classic Paper ◽  
Physical Principles ◽  
The Ideal

Fifteen years ago, Hall described clearly the advantages of the thin section approach to biological x-ray microanalysis, and described clearly the ratio method for quantitive analysis in such preparations. In this now classic paper, he also made it clear that the ideal method of sample preparation would involve only freezing and sectioning at low temperature. Subsequently, Hall and his coworkers, as well as others, have applied themselves to the task of direct x-ray microanalysis of frozen sections. To achieve this goal, different methodological approachs have been developed as different groups sought solutions to a common group of technical problems. This report describes some of these problems and indicates the specific approaches and procedures developed by our group in order to overcome them. We acknowledge that the techniques evolved by our group are quite different from earlier approaches to cryomicrotomy and sample handling, hence the title of our paper. However, such departures from tradition have been based upon our attempt to apply basic physical principles to the processes involved. We feel we have demonstrated that such a break with tradition has valuable consequences.

On the High Voltage Electron Microscopy (1 MeV) of Biological Thick Sections

1972 ◽  
Vol 30 ◽  
pp. 464-465
Author(s):  
William H. Massover
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Present Report ◽  
Biological Tissues ◽  
Specimen Preparation ◽  
Technical Problems ◽  
High Voltage Electron Microscopy ◽  
Thin Sections ◽  
Voltage Electron ◽  
High Voltage Electron

Stereoscopic examination of thick sections of fixed and embedded biological tissues by high voltage electron microscopy has been shown to allow direct visualization of three-dimensional fine structure. The present report will consider the occurrence of some new technical problems in specimen preparation and Image interpretation that are not common during lower voltage studies of thin sections.Thick Sectioning and Tissue Coloration - Epon sections of 0.5 μm or more that are cut with glass knives do not have a uniform thickness as Judged by their interference colors; these colors change with time during their flotation on the knife bath, and again when drying onto the specimen support. Quoted thicknesses thus must be considered only as rough estimates unless measured in specific regions by other methods. Chloroform vapors do not always result in good spreading of thick sections; however, they will spread spontaneously to large degrees after resting on the flotation bath for several minutes. Ribbons of thick sections have been almost impossible to obtain.

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