Study on type selection of shield equipment in different geological conditions

2014 ◽  
pp. 409-412
Keyword(s):  
Type Selection ◽  
Geological Conditions ◽  
Selection Of

Basking Site Selection and Usage Strategies of the European Pond Turtle, Emys orbicularis (Linnaeus, 1758) in Babat valley (Gödöllő, Hungary)

2021 ◽  
Vol 28 (4) ◽  
pp. 175-184
Author(s):  
Gergő Erdélyi ◽  
Borbála Szabó ◽  
István Kiss
Keyword(s):  
Site Selection ◽  
Habitat Characteristics ◽  
Freshwater Turtles ◽  
Emys Orbicularis ◽  
Pond Turtle ◽  
Site Type ◽  
Type Selection ◽  
Body Sizes ◽  
Negative Effect ◽  
Selection Of

Sun basking is the most common method for freshwater turtles, such as the European pond turtle, to maintain optimal body temperature. The attributes of the macro- and microhabitat features around the basking sites affect the basking site selection of the European pond turtle. To protect the European pond turtle, it is important to know the basking habits among the biological characteristics of the species, along with the effects of the habitat characteristics and the choice of the type of basking sites. The purpose of our research was to detect the effects of macro- and microhabitat features on the selection of basking sites. We wanted to determine basking site type selection according to the carapace length classes and if there is any difference in the choice of basking trunks and branches with different thicknesses. Turtles choose basking sites with less closed vegetation in their environment. We have detected seasonal differences in the microhabitat features. The closing reed and Typha sp. had a negative effect on the number of observed basking turtles. The most popular type of basking sites in the pond system was the commonly occurred fallen tree trunks and branches in the water, regardless of turtle body size. Most turtles used thinner tree trunks and branches for basking. In the meantime, we found differences in the choice of basking trunks between the turtles with different body sizes. Younger turtles with smaller bodies appeared in larger numbers on emergent branches with smaller diameters.

Comparative analysis of straight grate machines and combined facilities grate-tubetype kiln-cooler for selection technologies of pellets production

2021 ◽  
Vol 77 (8) ◽  
pp. 957-968
Author(s):  
A. A. Butkarev ◽  
E. A. Butkareva
Keyword(s):  
Comparative Analysis ◽  
Iron Ore ◽  
High Efficiency ◽  
Electric Energy ◽  
Iron Ore Pellets ◽  
Electric Energy Consumption ◽  
Ore Pellets ◽  
Type Selection ◽  
Cost Of Energy ◽  
Selection Of

At present, mainly straight grate machines (SGM) and combined facilities grate-tube-type kiln-cooler (GKC) are used for heat-strengthening induration of iron ore pellets. Their total share in the produced iron ore pellets in the world accounts for 93%, of which SGM takes 60% and GKC – 33%, which speaks about high efficiency of both methods of induration. At the same time, when making decision on construction a pelletizing plant, a question of selection of most effective technology of iron ore pellets production by SGM and GKC often arises. Results of comparative analysis of efficiency of technologies of iron ore pellets production by SGM and GKC presented. Features of various ore types pellets induration considered as well as possibilities of ensuring the required quality of finished pellets at application for induration SGM and GKC. Data on maximum productivity of the considered induration facilities, amount of dust, fines formation, emissions of harmful substances into environment and electric energy consumption presented. Importance of a possibility of accounting of fuel type selection, of heat expenses for heat treatment, of expenses for maintenance, capital and operation costs were noted. It was shown that choice of a particular variant of technology should be done at the stage of elaboration feasibility study accounting existing experience of facilities running, availability of fuel types, cost of energy resources, climate zone and assembling solutions.

scholarly journals Research and Application of Rubber Tree Quantitative Fertilization System Control Based on PLC

2018 ◽  
Vol 176 ◽  
pp. 01013
Author(s):  
Yeqin Wang ◽  
Yuan Zhang ◽  
Yiguo Deng ◽  
Lijiao Wei ◽  
Shengli Liu
Keyword(s):  
Natural Rubber ◽  
Control Method ◽  
Frequency Converter ◽  
Rubber Tree ◽  
Control Process ◽  
System Control ◽  
Application Process ◽  
Type Selection ◽  
Fertilization System ◽  
Selection Of

In this paper, the quantitative control method and system control process of the natural rubber forest quantitative fertilization system are introduced on the basis of the demand for the quantitative fertilization of natural rubber forest and the application process of the rubber forest fertilizing machine. The selection of PLC, frequency converter type selection and software design process are described in detail.

MATLAB-Based Kinematic Analysis on Mechanisms of Multifunctional Wheelchair

2010 ◽  
Vol 97-101 ◽  
pp. 2785-2791
Author(s):  
Ai Ping Li ◽  
Jun Hu ◽  
Jian Guo Zhang
Keyword(s):  
Simulation Model ◽  
Dynamic Simulation ◽  
Upper Limb ◽  
Kinematic Analysis ◽  
Working Condition ◽  
Simulation Tool ◽  
Type Selection ◽  
Motion Parameters ◽  
Selection Of

This paper simplifies the upper limb lifting mechanism of the multifunctional wheelchair, takes the dynamic simulation tool Simulink of MATLAB as a platform, establishes a simulation model for kinematic analysis on the upper limb lifting mechanism, and executes the simulation after all parameters are set. The result shows that such simulation can help to conveniently and accurately get the motion parameters of the mechanism and optimize the parameters immediately, so that reference can be provided for type selection of this mechanism, it can be better understand the working condition of the multifunctional wheelchair, and complete the structure of product prototypes.

Working Fluids Used for Drilling Deep Boreholes

2014 ◽  
Vol 508 ◽  
pp. 150-155 ◽  
Author(s):  
Marian Šofranko ◽  
Erika Škvareková ◽  
Gabriel Wittenberger
Keyword(s):  
Chemical Composition ◽  
Drilling Fluid ◽  
Chemical Properties ◽  
Proper Function ◽  
Working Fluids ◽  
Physico Chemical ◽  
Geological Conditions ◽  
Deep Boreholes ◽  
Selection Of

Particularly important is the use of drilling fluid in carrying out drilling works to great depths and especially in difficult geological conditions. Proper function of the drilling fluid is governed by the selection of their physico-chemical properties. Drilling works of hydrogeological survey require circulation of borehole with such rinses, which at a minimum pollute water-bearing horizons and their chemical composition meets hygiene requirements.

Risk assessment based selection of rock TBM for adverse geological conditions using Fuzzy-AHP

2010 ◽  
Vol 69 (4) ◽  
pp. 523-532 ◽  
Author(s):  
Jafar Khademi Hamidi ◽  
Kourosh Shahriar ◽  
Bahram Rezai ◽  
Jamal Rostami ◽  
Hadi Bejari
Keyword(s):  
Risk Assessment ◽  
Fuzzy Ahp ◽  
Geological Conditions ◽  
Selection Of
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