نتایج جستجو برای: cutter
تعداد نتایج: 2094 فیلتر نتایج به سال:
High speed milling (HSM) has great potential use in die/mold cutting, but traditional machining plans do exploit HSM capabilities effectively. An important consideration for in HSM is to limit cutting force variations, and one way to do so is to reduce Cutter-Workpiece engagement (CWE) variations. CWE is measured as the area of the tool instantaneously engaged with the part. Estimating CWE as a...
In this paper, to simulate mechanical stress on the cutter bar of the harvesting combine during cutting of wheat stems, first, shearing strength of the stems was measured for various moisture content levels and cutting heights. After that the cutter bar of combine was simulated by Abaqus with the specified conditions. The results of the simulation showed that with increase in moisture content o...
This paper describes how genetic programming can be applied to a simple problem. The problem is to discover program, which can control grass-cutter on a toroidal grid with randomly arranged obstacles, to cut largest area without redundant moves. This paper shows, how selection of suitable individuals for creation of next generation of individual solutions (=programs) affects results.
Herbivores can gain indirect access to recalcitrant carbon present in plant cell walls through symbiotic associations with lignocellulolytic microbes. A paradigmatic example is the leaf-cutter ant (Tribe: Attini), which uses fresh leaves to cultivate a fungus for food in specialized gardens. Using a combination of sugar composition analyses, metagenomics, and whole-genome sequencing, we reveal ...
Three cases of intermittent obstruction of the mitral prosthesis (Cutter-Smeloff) due to ball variance have been reported. The typical findings were marked variation in the arterial pulse and the intensity of the mitral closing sound and intermittent absence of the opening click. The phonocardiography revealed varying intervals from aortic closing sound to the opening click (A2 OC interval). He...
The manner in which terrestrial ecosystems are regulated is controversial. The "top-down" school holds that predators limit herbivores and thereby prevent them from overexploiting vegetation. "Bottom-up" proponents stress the role of plant chemical defenses in limiting plant depredation by herbivores. A set of predator-free islands created by a hydroelectric impoundment in Venezuela allows a te...
Now and then, we see discussions or debates about orchestration versus choreography. Often, it’s no more than the standard ‘my technique is better than your’s’, talking but not listening approach. Or, it’s focused on a simplified differentiation between BPEL and WS-CDL aimed at making sense of why we have so many different standards (good question). Here, the typical line is that BPEL is for or...
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