scholarly journals Improving the efficiency of manipulator-type machines with an improved hydraulic drive

2021 ◽  
Vol 875 (1) ◽  
pp. 012055
Author(s):  
I Chetverikova ◽  
P Popikov ◽  
S Glushkov
Keyword(s):  
Hydraulic Drive ◽  
Federal District ◽  
Dynamic Loads ◽  
Capital Investments ◽  
Combined Method ◽  
Hydraulic Equipment ◽  
Loading And Unloading ◽  
The Cost ◽  
First Time ◽  
Efficiency And Reliability

Abstract The article considers the possibility of increasing the efficiency of manipulator-type machines when harvesting wood by increasing the productivity, energy efficiency and reliability of the hydraulic equipment used. A combined method of transporting timber from logging sites by road and water transport using equipment with an improved hydraulic drive of the manipulator is proposed. The issue has not been worked through before. Using the example of the Northwestern Federal District, the author considers the development of forest areas located in the upper reaches of small and medium rivers. For the first time, original hydromechanical dampers and energy-saving devices are used in hydraulic drives of manipulators of forest machines to reduce dynamic loads and energy consumption for loading and unloading timber. This increases the efficiency of the use of manipulator-type machines, creating mobility, reducing equipment costs, the time spent waiting for unloading on sites for further rafting or shipment. The development of forest areas in a combined way will reduce capital investments for the construction of transport routes at the border of waterways by at least 3 times. All this will reduce the cost of harvesting in general and eliminate the use of additional loaders.

scholarly journals Scientific and organizational support for implementation of the strategy of innovative development of production in road construction complex with application of automobraders with additional universal working equipment

2019 ◽  
Vol 6 (2) ◽  
Author(s):  
Nikolai Tokar ◽  
Zelgedin Mevlidinov ◽  
Tatiana Levkovich ◽  
Alexandr Foevtsov
Keyword(s):  
Organizational Support ◽  
Main Idea ◽  
Road Construction ◽  
Technical Condition ◽  
Third Party ◽  
Capital Investments ◽  
Hydraulic Motor ◽  
Road Building ◽  
Loading And Unloading ◽  
The Cost

The work outlines ways to intensify the production of planning and loading and unloading operations in a road-building complex using motor graders with controlled excavator equipment using comparative, logical analysis and synthesis. The study of the representativeness and technical condition of car parks, as well as indicators of their application revealed the following: the structure of machine parks contains a narrow range of nomenclature and the machines of small and medium sizes prevail; in the structure of the machine parks, the outdated planning and earthmoving machinery are represented – 52,7 %; loaders from 5,1 % to 10,5 %; hand mechanized tools – 17 %; equipment with high physical deterioration is more than 60 %; equipment leased from third-party organizations on a permanent basis is 17 %, and the total amount leased is 1,5 %. The main idea of the new approach is the idea of forming a compact fleet of vehicles in order to reduce the cost of maintaining it by incorporating universal equipment into the composition, each unit of which can perform the functions of 2–4 machines with the complete elimination of works on re-equipment of replaceable working bodies. In the course of research, additional working equipment of a motor grader was proposed, located in front of the machine, is a loader’s working equipment consisting of a bucket, boom, thrust, hydraulic bucket and boom control cylinder, in the upper part of the rear wall of the bucket, rigidly mounted excavator equipment, represented by two brackets driven by a hydraulic motor. Inside the brackets by means of a swivel is fixed an arrow with a handle, in the coupling of which there is a hydraulic motor, which is connected to the bucket. Lifting and lowering excavator equipment is performed by two hydraulic cylinders, hinged to the brackets and the boom. Forecast calculations showed that the cost of a modular multifunctional motor grader will on average be about 4 million rubles. The volume of capital investments for the purchase of a compact fleet of vehicles for an average enterprise of a road-building complex in the urban economy based on the use of multi-functional modular equipment will amount to approximately 24 million rubles. The payback period is 2–2,5 years. As a result of the research, the composition and structure were determined, the main ways of intensifying the planning and loading and unloading operations in the road-building complex with the use of motor graders with controlled excavator equipment were proposed.

scholarly journals PROMISING DESIGN OF A RECUPERATIVE SPRING-HYDRAULIC FIFTH WHEEL TRAILER TRUCK WITH A SEMITRAILER

2020 ◽  
Vol 8 (1) ◽  
pp. 299-305
Author(s):  
Valeriy Posmetev ◽  
Vadim Nikonov ◽  
Aleksandr Avdyuhin
Keyword(s):  
Fuel Consumption ◽  
High Reliability ◽  
Hydraulic Drive ◽  
Operating Conditions ◽  
Dynamic Loads ◽  
Energy Losses ◽  
Reduce Fuel Consumption ◽  
Metal Consumption ◽  
Loading And Unloading ◽  
Favorable Conditions

The relevance of the development and use of new promising designs of fifth wheel coupling devices for forestry tractors with semitrailers, aimed at ensuring the simplicity of the design of fifth wheel coupling devices, their high reliability, safety in work, reducing metal consumption and the possibility of accumulating and using energy that is not efficiently dissipated into the environment, is substantiated. The operating conditions of timber tractors with semitrailers for timber removal are described. The main transients occurring in the fifth wheel coupling and contributing to the emergence in it of large dynamic loads from the inertia of the mass of the semitrailer are given. A promising design of a recuperative spring-hydraulic fifth wheel trailer truck with a semitrailer is proposed, which allows to reduce the energy losses that occur in the fifth wheel trailer, to accumulate and is useful to use in the hydraulic drive of the manipulator during the loading and unloading of timber. The device and operation of the regenerative spring-hydraulic fifth wheel coupling are described. It was revealed that the use of the proposed device will improve ride smoothness and reduce fuel consumption of the forest tractor with a semitrailer, as well as provide more favorable conditions for the driver to work.

An Evaluation of Provincial Macroeconomic Performance in Vietnam

2017 ◽  
pp. 34-47
Author(s):  
Hoi Le Quoc ◽  
Nam Pham Xuan ◽  
Tuan Nguyen Anh
Keyword(s):  
Development Strategy ◽  
Institutional Transformation ◽  
Economic Indicators ◽  
Macroeconomic Performance ◽  
Economic Development Strategy ◽  
Socio Economic Development ◽  
The Cost ◽  
Development Objectives ◽  
First Time

The study was targeted at developing a methodology for constructing a macroeconomic performance index at a provincial level for the first time in Vietnam based on 4 groups of measurements: (i) Economic indicators; (ii) oriented economic indicators; (iii) socio-economic indicators; and (iv) economic - social – institutional indicators. Applying the methodology to the 2011 - 2015 empirical data of all provinces in Vietnam, the research shows that the socio-economic development strategy implemented by those provinces did not provide balanced outcomes between growth and social objectives, sustainability and inclusiveness. Many provinces focused on economic growth at the cost of structural change, equality and institutional transformation. In contrast, many provinces were successful in improving equality but not growth. Those facts threaten the long-term development objectives of the provinces.

Assessment of sensitivity of the efficiency of regional tax spending towards investment attractiveness of the types of economic activity carried out by the residents of advanced development territory

2020 ◽  
pp. 98-110
Author(s):  
Evgeniya Mikhailovna Popova ◽  
Guzel Mukhtarovna Guseinova ◽  
Sergei Borisovich Milov
Keyword(s):  
Economic Activity ◽  
Socioeconomic Development ◽  
Federal District ◽  
Tax Incentives ◽  
Capital Investments ◽  
The Subject ◽  
Investment Process ◽  
The Impact ◽  
Advanced Development

The deficit of subnational budgets and deceleration capital investments in multiple Russian regions increase the relevance of research aimed at improvement of tax incentivizing practice of the regional investment process. The studies focused on determination of the impact of socioeconomic and institutional factors upon the efficiency of investment tax expenses obtained wide circulation within the foreign scientific literature. The subject of this article is the assessment of sensitivity of the efficiency of regional tax expanses towards investment attractiveness of the types of economic activity carried out by the residents of territories of advanced socioeconomic development, created in the subjects of Far Easter Federal District. The scientific novelty and practical values of this research consists in substantiation of the reasonableness of assessment of investment attractiveness of the types of economic activity that are stimulated by tax incentives. Methodology for assessing investment attractiveness is proposed and tested. The conclusion is made that in case of low investment attractiveness of the type of economic activity, which was planned to support by tax incentives, it is required to conduct and additional analysis to avoid unjustified tax expanses.

scholarly journals Autism Tsunami: the Impact of Rising Prevalence on the Societal Cost of Autism in the United States

2021 ◽  
Author(s):  
Mark Blaxill ◽  
Toby Rogers ◽  
Cynthia Nevison
Keyword(s):  
Forecast Model ◽  
The United States ◽  
Population Projections ◽  
Base Case ◽  
Prevention Strategies ◽  
Total Base ◽  
Cost Categories ◽  
The Cost ◽  
The Impact ◽  
First Time

AbstractThe cost of ASD in the U.S. is estimated using a forecast model that for the first time accounts for the true historical increase in ASD. Model inputs include ASD prevalence, census population projections, six cost categories, ten age brackets, inflation projections, and three future prevalence scenarios. Future ASD costs increase dramatically: total base-case costs of $223 (175–271) billion/year are estimated in 2020; $589 billion/year in 2030, $1.36 trillion/year in 2040, and $5.54 (4.29–6.78) trillion/year by 2060, with substantial potential savings through ASD prevention. Rising prevalence, the shift from child to adult-dominated costs, the transfer of costs from parents onto government, and the soaring total costs raise pressing policy questions and demand an urgent focus on prevention strategies.

scholarly journals A METHODOLOGY TO SUPPORT COMPANIES IN THE FIRST STEPS TOWARDS DE-MANUFACTURING

2021 ◽  
Vol 1 ◽  
pp. 131-140
Author(s):  
Federica Cappelletti ◽  
Marta Rossi ◽  
Michele Germani ◽  
Mohammad Shadman Hanif
Keyword(s):  
Environmental Impact ◽  
End Of Life ◽  
Design Stage ◽  
Life Strategies ◽  
Disassembly Sequence ◽  
The Status ◽  
The Cost ◽  
Technical Solutions ◽  
First Time ◽  
Complex Activities

AbstractDe-manufacturing and re-manufacturing are fundamental technical solutions to efficiently recover value from post-use products. Disassembly in one of the most complex activities in de-manufacturing because i) the more manual it is the higher is its cost, ii) disassembly times are variable due to uncertainty of conditions of products reaching their EoL, and iii) because it is necessary to know which components to disassemble to balance the cost of disassembly. The paper proposes a methodology that finds ways of applications: it can be applied at the design stage to detect space for product design improvements, and it also represents a baseline from organizations approaching de-manufacturing for the first time. The methodology consists of four main steps, in which firstly targets components are identified, according to their environmental impact; secondly their disassembly sequence is qualitatively evaluated, and successively it is quantitatively determined via disassembly times, predicting also the status of the component at their End of Life. The aim of the methodology is reached at the fourth phase when alternative, eco-friendlier End of Life strategies are proposed, verified, and chosen.

A standardized terminology of spines in the order Siluriformes (Actinopterygii: Ostariophysi)

2021 ◽  
Author(s):  
Gustavo A Ballen ◽  
Mario C C De Pinna
Keyword(s):  
Comparative Anatomy ◽  
Appendicular Skeleton ◽  
Extensive Literature ◽  
Direct Examination ◽  
Dorsal Fin ◽  
Anatomical Nomenclature ◽  
Standardized Terminology ◽  
The Cost ◽  
First Time ◽  
Terminology System

Abstract A standardized terminology for the anatomy of pectoral- and dorsal-fin spines in the order Siluriformes is proposed based on an extensive literature review and direct examination of representatives of the order. The adult anatomy of the spines is described in detail. Terminology of various spine parts are reviewed and standardized, each term provided with a synonymic list organizing previous usage. Most of the structures treated have been recorded and named in the literature, but some are herein named for the first time. A quantitative approach is proposed for orienting decisions on name usage, aiming at minimizing differences between the terminology proposed and the vast amount of pre-existing literature, herein called the cost function. It is expected that this system will aid efforts in organizing the chaotic anatomical nomenclature of the appendicular skeleton in Siluriformes, and provide a solid basis for advances in comparative anatomy and nomenclature. The proposed terminology system has potential application on a number of fields that utilize information from catfish spines, ranging from taxonomy to phylogenetic systematics to paleontology and archaeology.

Empowering and Directive Leadership: The Cost of Changing Styles

2021 ◽  
pp. 227853372110083
Author(s):  
Smita Mukherjee ◽  
Zubin R. Mulla
Keyword(s):  
Laboratory Experiment ◽  
Leadership Styles ◽  
Leadership Style ◽  
Affective Commitment ◽  
Team Outcomes ◽  
History Of ◽  
Satisfaction With The Leader ◽  
The Cost ◽  
First Time

We examine the cost of leaders changing between empowering and directive leadership styles on team outcomes. In a laboratory experiment, we collected data from 240 participants in 80 teams. Confederates enacted different leadership styles and led teams of participants in performing a series of tasks. When leaders changed their style from directive to empowering, teams took time to respond in terms of higher satisfaction with leader and affective commitment. However, when leaders changed their style from empowering to directive, the deterioration of satisfaction with leader and reduction in affective commitment were immediate. Moreover, teams of leaders who had been consistently directive showed higher affective commitment as compared to teams of leaders who had a history of being empowering but later shifted to being directive. First time managers can get inputs on how they should enact their leadership style and be aware that switching between styles may impose long-term costs on the team’s affective commitment and satisfaction with the leader.

scholarly journals An Optimized Mathematical Model for Items Supplies Planning of a Logistic System

2016 ◽  
Vol 10 (10) ◽  
pp. 133
Author(s):  
Mohammad Ali Nasiri Khalili ◽  
Mostafa Kafaei Razavi ◽  
Morteza Kafaee Razavi
Keyword(s):  
Mathematical Model ◽  
Mixed Integer ◽  
Logistics System ◽  
Proposed Model ◽  
Multiple Objective Decision Making ◽  
System Requirements ◽  
Purchasing Logistics ◽  
The Cost ◽  
The Mathematical Model ◽  
First Time

Items supplies planning of a logistic system is one of the major issue in operations research. In this article the aim is to determine how much of each item per month from each supplier logistics system requirements must be provided. To do this, a novel multi objective mixed integer programming mathematical model is offered for the first time. Since in logistics system, delivery on time is very important, the first objective is minimization of time in delivery on time costs (including lack and maintenance costs) and the cost of purchasing logistics system. The second objective function is minimization of the transportation supplier costs. Solving the mathematical model shows how to use the Multiple Objective Decision Making (MODM) can provide the ensuring policy and transportation logistics needed items. This model is solved with CPLEX and computational results show the effectiveness of the proposed model.

scholarly journals A New Design of Sydney’s Frontport Check-in System

2021 ◽  
Vol 13 (7) ◽  
pp. 3850
Author(s):  
Ting Liu ◽  
Gabriel Lodewijks
Keyword(s):  
Swot Analysis ◽  
Control Measures ◽  
Key Factors ◽  
Scheme Design ◽  
Different Types ◽  
Baggage Handling ◽  
Loading And Unloading ◽  
The Cost ◽  
Main Engine ◽  
Process Method

This paper proposed a scheme design for Sydney’s frontport check-in system, which completes check-in and baggage drop-off at Sydney’s Circular Quay, and transports the baggage to Sydney Kingsford Smith Airport by waterway, and provided a strengths, weaknesses, opportunities and threats (SWOT) analysis of Sydney’s frontport check-in system. Using the process method of quality management, the frontport check-in process was divided into three sub-processes: baggage consignment, baggage packing and transportation, and airport baggage handling. The eight key elements of each sub-process such as input, output, resources, and methods, etc. were discussed, the key factors influencing the cost of baggage transportation were analyzed, and the cost control measures such as adopting economic speed, reducing fuel consumption of the main engine, improving the ship loading rate, and raising loading and unloading efficiency were proposed. At the same time, two different types of baggage transportation ships and other parameters that affect the cost such as the number of berths, ships, lifting machineries, and the yard area were analyzed and calculated through calculation cases. This scheme is a beneficial addition to the existing in-town check-in system.

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