scholarly journals Results of comparative studies of the quality indicators of the working bodies of the seed-onion planting machine

2021 ◽  
pp. 77-82
Author(s):  
Alexey Semenovich Dorokhov ◽  
Alexey Viktorovich Sibirev ◽  
Alexander Gennadievich Aksenov
Keyword(s):  
Quality Indicators ◽  
Performance Indicators ◽  
Comparative Studies ◽  
Laboratory Studies ◽  
Working Bodies ◽  
Translational Speed ◽  
Range Of Values ◽  
Center Distance ◽  
Made In

The article presents the design of the disc-seeding organ and the opener of the machine for planting onion sets. They are described the methodology and the results of comparative studies to determine the quality indicators of the work of the closing working bodies of the machine for planting onion sets. The results of the comparative laboratory studies of the embedding working bodies of the machine for planting onion sets showed that the disc embedding bodies provide higher performance indicators than the opener with installed embedding elements made in the form of a hiller in the investigated range of values of the translational speed of movement and the center distance between the embedding elements of sealing organs by 1,7% on average.

LABORATORY RESEARCH RESULTS OF ONION SEPARATION ON A BAR ELEVATOR WITH AN ADJUSTABLE TILT ANGLE

2020 ◽  
Keyword(s):  
Quality Indicators ◽  
Laboratory Tests ◽  
Separation Process ◽  
Laboratory Research ◽  
Laboratory Studies ◽  
Blade Angle ◽  
Quality Performance ◽  
Root Crops ◽  
Optimal Values ◽  
Translational Speed

Existing machines for harvesting root crops and onions do not provide qualitative indicators of root crops pile separation, which leads to a violation of agrotechnical requirements when harvesting them [1, 2]. It is necessary to search for new solutions to increase the quality indicators of root crop separation, namely to increase the completeness of separation and reduce damage. The article presents the design of the onion set harvesting machine, equipped with a bar elevator with an asymmetric arrangement of shakers. We described the methodology and results of laboratory studies to determine the quality indicators of heap onion sets separation on an experimental bar elevator. The results of laboratory tests of the onion set harvesting machine equipped with a bar elevator with an adjustable blade angle showed a high-quality performance of separation process at optimal values of parameters: translational speed of the bar elevator blade vEL = 1.55 ... 1.68 m s, the supply of onions heap Qb?- 19.7 ... 27.1 kg s and inclination angle of the blade bar elevator is in the range аг= 15.1... 21.9 degrees. The use of a bar elevator with an adjustable angle of inclination of the blade allows to increase the completeness of onion sets separation by 20%, and reduce damage to the bulbs by 11%.

scholarly journals INFLUENCE OF A NUMBER OF IMPACTS OF LOW-SPEED MIXER BLADES ON CONCRETE QUALITY BEING PREPARED

2019 ◽  
Vol 51 (3) ◽  
pp. 92-99
Author(s):  
M.V. Borisova ◽  
◽  
A.Yu. Titov ◽  
V.V. Novikov ◽  
V.V. Konovalov ◽  
...  
Keyword(s):  
Literature Review ◽  
Power Function ◽  
Mixing Process ◽  
Slow Speed ◽  
Horizontal Shaft ◽  
Concrete Quality ◽  
Blade Mixer ◽  
Working Bodies ◽  
Made In ◽  
State Agricultural Academy

The paper presents purpose equations describing the uneven mixing depending on the number of the mixer blade impacts per unit of concrete weight as well as the weight of the mixture that have an impact on blades of the slow-speed mixer. Based on the literature review and analysis of the mixing process conducted in the Samara State Agricultural Academy, the design of the blade mixer was developed. The mixer consists of a body where there is a horizontal shaft with working bodies, made in the form of radial blades of helical shape. There are received equations that allow determining the concrete uniformity depending on a number of the impacts of the mixer blades per unit of the concrete weight as well as on the concrete weight that act on the blades of the slow-speed mixer. The power function is adequately described by the experimental results of 98 % confidence probability. In the studied areas of changes in independent factors rational values of the number of impacts per unit of the concrete weight is not less than 800 PCs/kg, as well as the concrete weight having impact on the blade of the slow-speed mixer is not more than 0,001 kg/PC.

scholarly journals Automated section for milling soil in near-trunk zones of orchard

2020 ◽  
Vol 161 ◽  
pp. 01068
Author(s):  
Dmitriy Khort ◽  
Rostislav Filippov ◽  
Igor Smirnov ◽  
Alexey Kutyrev ◽  
Stepan Semichev
Keyword(s):  
Theoretical Analysis ◽  
Quality Indicators ◽  
Hydraulic System ◽  
Tracking System ◽  
Fruit Trees ◽  
Original Design ◽  
Milling Cutter ◽  
Working Bodies

Machines used in gardens do not fully comply with the quality indicators of tillage, especially in the near-trunk zones of fruit trees. Theoretical analysis made it possible to establish that the preferred protective distance in the aisle of the garden should be at least 0.20 m in each direction, and in the inter-barrel space of the boles along a row of 0.38 m and to establish the optimal width of the extension section of 0.55 m. As a result of the research, an original design of the deflectable milling section of the garden milling cutter with an autonomous hydraulic system was proposed and developed, as working bodies knives with special sharpening are used. The tracking system of the remote section is equipped with a double remote probe, when exposed to which the section is retracted to the required distance to protect the trunk of a tree. The use of a deflectable milling section of a garden milling cutter allows to increase the accuracy and quality indicators of processing in the near-trunk zones of garden plantings, while the density of the soil decreases on average by 24%.

Smooth Bromegrass Response to Herbicides as Affected by Time of Application in Relation to Nitrogen Fertilization

Weed Science ◽  
1968 ◽  
Vol 16 (4) ◽  
pp. 443-446 ◽  
Author(s):  
M. K. McCarty ◽  
C. J. Scifres
Keyword(s):  
Nitrogen Fertilization ◽  
Primary Site ◽  
Bromus Inermis ◽  
Dichlorophenoxyacetic Acid ◽  
Laboratory Studies ◽  
Severe Damage ◽  
Smooth Bromegrass ◽  
Time Of Application ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
Made In

Smooth bromegrass (Bromus inermis Leyss.) treated in the fall tended to be more damaged than that treated in the spring, regardless of herbicide. Nitrogen fertilizer reduced the loss in yield resulting from herbicides but was least effective with 1 lb/A of 4-amino-3,4,6-trichloropicolinic acid (picloram). Laboratory studies showed that roots of smooth bromegrass were the primary site of picloram uptake. Root uptake explained the severe damage in curred from applications of picloram made in the fall. The order of increasing phytotoxicity of herbicides to smooth bromegrass studied in these experiments was 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) and 2,4-dichlorophenoxyacetic acid (2,4-D)<2-methoxy-3,6-dichlorobenzoic acid (dicamba) < picloram.

Quality Indicators for Life Cycle Inventory: Real Cases Exploratory Application

2013 ◽  
Vol 431 ◽  
pp. 350-355
Author(s):  
Assed Naked Haddad ◽  
Karina Condeixa ◽  
Michele Sedrez ◽  
Ana Catarina Jorge Evangelista ◽  
Dieter Thomas Boer
Keyword(s):  
Life Cycle ◽  
Quality Indicators ◽  
Life Cycle Inventory ◽  
Building Materials ◽  
High Level ◽  
Brazilian Studies ◽  
European Production ◽  
Made In

The life cycle inventory for the production of building materials made in Brazil do not follow standardizations regarding the choice and representation of data and are not eligible for other exchanges between Brazilian and European inventories. For this study inventories Brazilian and European production of ceramic bricks were analyzed on the basis of quality indicators recommended by ISO14040. The results confirmed that Brazilian studies show a high level of uncertainty and are incompatible with international inventories.

On the greenish-blue glazed pottery jug unearthed from the Eastern Han tombs at Liaowei in Hepu County, Guangxi

2014 ◽  
Vol 14 (1) ◽  
Author(s):  
Shan Huang ◽  
Zhaoming Xiong ◽  
Chunyan Zhao
Keyword(s):  
Comparative Studies ◽  
Han Dynasty ◽  
Chemical Compositions ◽  
Academic Values ◽  
Greenish Blue ◽  
Southwestern Iran ◽  
Maritime Communication ◽  
Eastern Han ◽  
Southern Iraq ◽  
Made In

AbstractThis paper made comparative studies on the greenish-blue glazed pottery jug unearthed from a tomb in the Liaowei Cemetery of the late Eastern Han Dynasty with the green-glazed potteries of the same time produced at home and abroad in the aspects of typological features, making techniques and chemical compositions, and drew the conclusion that this pottery jug was made in the present-day southern Iraq or southwestern Iran around 43-200 CE, which was at the time and territory of the Parthian Empire (247 BCE-226 CE), or the Anxi in the historic literature of the Han Dynasty. The studies further pointed out that this jug was transported into Hepu through the maritime route as a utensil for daily use. Because there have not been records about the maritime communication between China and Parthia, the discovery of this pottery jug in Hepu expanded our understanding to the maritime communication in the Han Dynasty, so it has important academic values.

scholarly journals Justification of optimal design and technological parameters of needle discs of the combined working body

2020 ◽  
Vol 17 ◽  
pp. 00016
Author(s):  
Alexander M. Petrov ◽  
Sergey A. Ivanayskiy ◽  
Mikhail A. Kanaev ◽  
Oleg M. Parfyonov ◽  
Maxim S. Ivanayskiy
Keyword(s):  
Optimal Design ◽  
Quality Indicators ◽  
Soil Tillage ◽  
Technological Parameters ◽  
Research Results ◽  
Soil Cultivation ◽  
Working Bodies ◽  
Rotor Tooth

The aim of the research is to improve soil tillage quality using combined working bodies in surface cultivation. There are various designs of combined tillage units including passive cultivators and active rotor-tooth working bodies cultivating land. However, an analysis of design and technological parameters of modern cultivators shows that they have a cumbersome design, required much metal and their quality indicators do not meet soil cultivation requirements. The article presents results of the studies on the influence of geometric and technological parameters of an additional battery of needle discs on land tillage quality. Using the research results, the land tillage has been improved and combined working bodies have been developed.

What does labor displacement mean for management consulting firms?

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Edouard Ribes
Keyword(s):  
Performance Indicators ◽  
Design Methodology ◽  
Production Costs ◽  
Management Consulting ◽  
Full Potential ◽  
Content Type ◽  
Consulting Firms ◽  
Standard Linear ◽  
Linear Regressions ◽  
Made In

Purpose This study aims to empirically investigate the effects of labor displacement on US management consulting (MC) firms. Design/methodology/approach This paper leverages standard linear regressions to identify and discuss correlations between progresses made in terms of labor displacement and the evolution of MC firms performance indicators. Findings In the context of US MC practices, the study shows that for every percent of work displaced, production costs are reduced by $3.7/h on average. It also highlights that as prices also go down by $3.3/h on average per percent of work displaced, off/near-shoring increases MC practices profitability. Displacing labor is yet a transformation that occurs mainly in very large firms (i.e. more than 1,000+ employees) and its full potential takes more than 4–5 years to realize. Originality/value This study provides new empirical benchmarks of the effect of labor displacement on MC firms. This study shows how long off/near-shoring takes to reach its full maturity.

PARASITES OF NYMPHAL AND ADULT GRASSHOPPERS (ORTHOPTERA: ACRIDIDAE) IN WESTERN CANADA

1958 ◽  
Vol 36 (2) ◽  
pp. 217-262 ◽  
Author(s):  
R. W. Smith
Keyword(s):  
Life Histories ◽  
Seasonal Occurrence ◽  
Western Canada ◽  
Laboratory Studies ◽  
Distinctive Features ◽  
Economic Significance ◽  
Made In

The taxonomy, distinctive features, life histories, seasonal occurrence, incidence of parasitism in different hosts and at different times, and the economic significance of 23 species of primary parasites of grasshoppers are described. Three species of hyperparasites are similarly discussed. The information is based on field collections made in Western Canada in 1938 to 1953 and on laboratory studies at Belleville in 1939 to 1955.

New Quality Assurance Tests for Building Quality Concrete Pavement

2017 ◽  
Vol 2630 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Jagan M. Gudimettla ◽  
Michael F. Praul ◽  
Jim Grove
Keyword(s):  
Real Time ◽  
Performance Indicators ◽  
Technology Implementation ◽  
New Technologies ◽  
Concrete Pavement ◽  
Design Stage ◽  
Past Century ◽  
The Past ◽  
Concrete Materials ◽  
Made In

Concrete materials and paving technologies have evolved considerably during the past century. However, testing technologies for concrete during construction have not kept pace. Some of the tests that are routinely used are not necessarily performance indicators and some are not made in real time. Seven new technologies are presented that are simple, real-time, field implementable, and economical and in many cases are performance indicators. Although some of these technologies could be used during the mixture design stage, others could be used during construction and some for both purposes. These technologies can be used to supplement or, in some cases, to replace the traditional tests for paving concrete. The discussion focuses on three items: ( a) traditional tests for paving concrete, ( b) new tests and technologies that could be used to supplement or replace the traditional tests, and ( c) suggested future specifications. Data collected by the FHWA Mobile Concrete Laboratory from its technology implementation efforts are presented to support the narrative on the benefits of these new technologies.

Sign in / Sign up

Export Citation Format

Share Document