scholarly journals The role and tasks of the support mats in construction of catalytic converters

2017 ◽  
Vol 170 (3) ◽  
pp. 96-99
Author(s):  
Magdalena KOZIOL-JAROSZ ◽  
Marek BRZEŻAŃSKI
Keyword(s):  
Operating Conditions ◽  
Basic Design ◽  
Catalytic Converters ◽  
Functional Requirements ◽  
Design Features ◽  
Ceramic Core ◽  
Manufacturing Methods

The purpose of support mats used in catalytic converters as connecting element between the ceramic core and the metallic converter housing has been presented in article. The functional requirements and operating conditions have been discussed as well as support mat types and manufacturing methods. The support mat choice and basic design features have been also presented.

Gear Materials, Properties, and Manufacture

2005 ◽  
Keyword(s):  
Friction And Wear ◽  
Operating Conditions ◽  
Basic Design ◽  
Lubricant Film Thickness ◽  
Materials Properties ◽  
Lubrication Regimes ◽  
Remaining Service Life ◽  
Manufacturing Methods ◽  
And Performance

Gear Materials, Properties, and Manufacture explains how material-related properties and operating conditions affect the lifetime and performance of gears and the ways in which they fail. It begins with a review of the basic design and configuration of gears and related engineering considerations. It then examines the effect of friction and wear and the role of lubrication in gear failures. It explains how to calculate lubricant film thickness, defines lubrication regimes, and presents guidelines for selecting and applying lubricants for specific applications. The chapters that follow cover gear materials and manufacturing methods, providing details on metals and plastics and processes such as casting and forging, powder metallurgy, injection molding, machining, grinding, finishing, and carburizing and nitriding treatments. The final chapters discuss the types and causes of gear failures and the steps involved in failure analysis. They also explain how to assess fatigue damage and estimate remaining service life and describe the tests that are used to evaluate the durability of gears under load. For information on the print version, ISBN 978-0-87170-815-1, follow this link.

CAD in the CIM Environment: Where Do We Go From Here?

1986 ◽  
Vol 39 (9) ◽  
pp. 1345-1349 ◽  
Author(s):  
Dell K. Allen ◽  
W. Van Twelves
Keyword(s):  
Computer Aided Design ◽  
Material Selection ◽  
Operating Conditions ◽  
Computer Integrated Manufacturing ◽  
Accurate Information ◽  
Functional Requirements ◽  
Essential Information ◽  
Design Systems ◽  
Aided Design ◽  
Product Definition

The importance of computer-aided design (CAD) has not been fully appreciated as it relates to computer integrated manufacturing (CIM). The CAD product definition model can provide essential information for many down-stream production, estimating, tooling, and quality assurance functions in the CIM environment. However, the product definition model may be inaccurate or incomplete, thus causing incomplete communication with possible scrap, re-work, and missed production deadlines. Other problems are related to the fact that many of our expert designers are retiring and taking their expertise with them. Merely being able to make 2D or 3D drawings on a CAD workstation does not make its operator a designer. A knowledge of production processes, tolerances, surface finish, and material selection is needed to supplement a designers knowledge of user needs, product functional requirements, operating conditions, cost, quality, and reliability targets. One of the most promising methods for providing timely and accurate information to the designer on an “as-needed” basis is through the use of expert design systems. Such systems promise to bridge the knowledge gap between CAD and CAM and help to incorporate these functions into the overall CIM environment.

British Rail Class 58 Diesel Electric Locomotive

1986 ◽  
Vol 200 (2) ◽  
pp. 135-147 ◽  
Author(s):  
M W J Etwell
Keyword(s):  
Type Structure ◽  
Electrical Engineer ◽  
Design Development ◽  
Electric Locomotive ◽  
Design Features ◽  
Main Design ◽  
Modern Manufacturing ◽  
Manufacturing Methods

This paper outlines the basic development background of the Class 58 locomotive and main design features, with areas of design development resulting from the introduction into service in 1983–85 of the first build of thirty-five locomotives and detail changes in design being applied to the second batch of fifteen locomotives authorized in 1984. This locomotive design developed from a joint exercise between British Rail Engineering Limited (BREL) and the then Chief Mechanical and Electrical Engineer (CM and EE), British Railways Board (BRB) in 1977 which resulted in BREL fully participating in the design development to utilize modern manufacturing methods. The Class 58 was designed by BR specifically for freight duties and is based on a strength underframe with bonnet-type structure and equipment in modular assemblies.

scholarly journals Evaluation of Power Indicators of the Automobile Engine

2018 ◽  
Vol 7 (4.3) ◽  
pp. 130 ◽  
Author(s):  
Hayder Abed Dhahad ◽  
Wissam Hameed Alawee ◽  
Andrii Marchenko ◽  
Dmytro Klets ◽  
Oleg Akimov
Keyword(s):  
Rational Choice ◽  
Dynamic Capabilities ◽  
Operating Conditions ◽  
Design Stage ◽  
Design Features ◽  
Automobile Engine ◽  
Power Characteristics ◽  
The Impact ◽  
Analytical Expressions ◽  
Engine Power

A method for estimating the power characteristics of the car engine in various driving regimes is proposed. It is determined that the volume of the free power (engine power reserve) allows the driver to implement the turning parameters and the time of its completion, which are set by the steering parameters, position and the speed of the steering wheels rotation. The engine power reserve is necessary to provide the required maneuverability indicators. The engine power during maneuvering is spent on overcoming the resistance to movement and on providing the impact controlled by the maneuver. The first component of the engine power can be called connected, and the second one can be called the free one or a controlled component. The received analytical expressions allow carrying out at the design stage a rational choice of capacity of the engine by the condition of maintenance of demanded properties of maneuverability. The developed method for constructing the refined acceleration characteristics of the engine makes it possible to determine the dynamic capabilities of the car, taking into account its design features and operating conditions. 

scholarly journals Interface, information, interaction: a narrative review of design and functional requirements for clinical decision support

2017 ◽  
Vol 25 (5) ◽  
pp. 585-592 ◽  
Author(s):  
Kristen Miller ◽  
Danielle Mosby ◽  
Muge Capan ◽  
Rebecca Kowalski ◽  
Raj Ratwani ◽  
...  
Keyword(s):  
Decision Support ◽  
Clinical Decision Support ◽  
Quality Care ◽  
Clinical Decision Support Systems ◽  
Clinical Decision ◽  
The Body ◽  
Narrative Review ◽  
Functional Requirements ◽  
Design Features ◽  
And Function

Abstract Objective Provider acceptance and associated patient outcomes are widely discussed in the evaluation of clinical decision support systems (CDSSs), but critical design criteria for tools have generally been overlooked. The objective of this work is to inform electronic health record alert optimization and clinical practice workflow by identifying, compiling, and reporting design recommendations for CDSS to support the efficient, effective, and timely delivery of high-quality care. Material and Methods A narrative review was conducted from 2000 to 2016 in PubMed and The Journal of Human Factors and Ergonomics Society to identify papers that discussed/recommended design features of CDSSs that are associated with the success of these systems. Results Fourteen papers were included as meeting the criteria and were found to have a total of 42 unique recommendations; 11 were classified as interface features, 10 as information features, and 21 as interaction features. Discussion Features are defined and described, providing actionable guidance that can be applied to CDSS development and policy. To our knowledge, no reviews have been completed that discuss/recommend design features of CDSS at this scale, and thus we found that this was important for the body of literature. The recommendations identified in this narrative review will help to optimize design, organization, management, presentation, and utilization of information through presentation, content, and function. The designation of 3 categories (interface, information, and interaction) should be further evaluated to determine the critical importance of the categories. Future work will determine how to prioritize them with limited resources for designers and developers in order to maximize the clinical utility of CDSS. Conclusion This review will expand the field of knowledge and provide a novel organization structure to identify key recommendations for CDSS.

Paper 11: Feed Pumps for Modern Steam Boiler Applications, Design, Development, and Operation

1969 ◽  
Vol 184 (14) ◽  
pp. 108-148
Author(s):  
P. S. Neporozhnii ◽  
A. K. Kirsh
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Operating Conditions ◽  
Steam Boiler ◽  
Design Development ◽  
Feed Pump ◽  
Design Features ◽  
Power Plant Equipment ◽  
Plant Equipment

This paper describes the operating conditions which form the basis for determining the various types of feed pump units needed to equip the main power plant equipment in the U.S.S.R. The principles upon which the feed pump groups are selected, according to the type of equipment installed in different power plants, are considered. The system diagrams and design features of the feed pumps are presented, together with descriptions of how they are driven.

CFD Simulations of Gases Flow in Calciners

2008 ◽  
Vol 59 (5) ◽  
Author(s):  
Zeno Ghizdavet ◽  
Adrian Volceanov ◽  
Augustin Semenescu
Keyword(s):  
Retention Time ◽  
Flow Patterns ◽  
Operating Conditions ◽  
Low Energy ◽  
Design Features ◽  
Cfd Simulations

As there is a broad range of constructive features and � more important � operating conditions regarding calciners that are used in clinkering plants, CFD simulations could be an effective tool in increasing their performance. A methodology that could be used to optimize their functioning is given here. In brief, CFD simulations are carried out both for computing the average gases velocity at their passage through the calciner and visualize exactly the flow patterns within the vessel. By properly adjusting dimensional and design features with the known outputs from the neighboring apparatus and with the required retention time of the particles in the calciner corresponding to a given decarbonation degree one could reach high running efficiency with low energy loses, without the need for demanding and expensive live trials.

Using Spreadsheets for Management Tasks

2014 ◽  
Author(s):  
Dr Cathy Burgess
Keyword(s):  
Decision Making ◽  
Basic Knowledge ◽  
Basic Design ◽  
Design Features ◽  
Basic Principles ◽  
Complex Information

In this chapter we will see how using spreadsheets can help you with many of the control tasks that we have discussed in the different chapters. We’ll also see how you can use graphs and charts (hand-drawn and by spreadsheet) to help in decision-making and presenting results. We will look at some of the simple techniques that can make spreadsheets easier to use on a frequent basis and at some of the shortcuts you can take. Incorporating some basic design features can help with ongoing usage, and with enabling others to use spreadsheets that you have designed. The use of charts and how they can help with presenting complex information in a simpler way will also be considered. It’s assumed that you have a basic knowledge of spreadsheets. If some of this is boring because you’re at a higher level of competence, then please move on. There’s a refresher exercise to revise skills and perhaps practise some new ones, and some suggestions about using spreadsheets for personal tasks. By the end of this chapter, therefore, you should be able to: - Comprehend the basic principles of spreadsheet design - Practise a range of techniques to improve speed and efficiency - Comprehend the variety of areas where spreadsheets can be used - Draw a chart to scale by hand - Create a chart using a spreadsheet.

CALCULATION OF THE EMISSION ON TRANSPORT

2015 ◽  
Vol 2 (1) ◽  
pp. 165-169 ◽  
Author(s):  
Кривошапов ◽  
S. Krivoshapov ◽  
Волков ◽  
V. Volkov
Keyword(s):  
Analytical Method ◽  
Operating Conditions ◽  
Design Features ◽  
Speed Mode

An analytical method of estimating emissions of transport vehicles in mass quantities. A feature of the method is that the parameters of toxicity are linked to the load and the speed mode of the machine, taking into account the design features and operating conditions

scholarly journals Effect of HPPMS Pulse-Frequency on Plasma Discharge and Deposited AlTiN Coating Properties

2017 ◽  
Vol 2017 ◽  
pp. 1-18 ◽  
Author(s):  
Stefanie Severin ◽  
Muhammad Naveed ◽  
Sabine Weiß
Keyword(s):  
Mechanical Properties ◽  
Magnetron Sputtering ◽  
Process Parameters ◽  
Metal Ion ◽  
Pulse Length ◽  
Film Deposition ◽  
Operating Conditions ◽  
Aluminium Content ◽  
Functional Requirements ◽  
Altin Coating

Coatings like TiAlN (titanium content more than 50%) or AlTiN (aluminium content more than 50%) are well established as hard and wear-resistant tool coatings, often prepared by physical vapour deposition (PVD) like arc evaporation or direct current magnetron sputtering (dcMS). With increasing challenges of operating conditions, there is a constant need for improvement of mechanical properties to withstand extreme loading conditions. This can be obtained by a higher amount of ionized sputtered metal atoms during the deposition process. To increase the metal ion flux a high-power pulse magnetron sputtering (HPPMS) was developed. In order to understand the relation between HPPMS process parameters and mechanical properties of the AlTiN coatings, the present study discusses how different pulse-frequencies (for a constant pulse length) influence AlTiN coating structure growth and their mechanical properties. In addition, film deposition rate and phase formation are influenced by altering process parameters like pulse length and frequency. Hence, different pulse-frequencies produce specific coatings with corresponding properties for functional requirements. Based on the established findings, answers to new scientific queries along with the demand to further optimize these coatings for tool applications are required.

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