Four-wheel, independently driven skid-steer mobile robots have been widely used in some fields, such as indoor product shipping and outdoor inspection exploration. Traditional robot controllers often use a kinematics controller to obtain the desired speed of each wheel, complete closed-loop control wheel achieve robot’s trajectory tracking control. However, based on may lead chattering spin fro...

However, many existing diagnostics for the tropical belt edge latitudes are subjective, with trends in the width of the tropical belt sensitive to the value of the parameters chosen. Further, it is unknown if widely-used reanalysis products reliably capture the seasonal cycle and interannual variability of the width of the tropical belt. Unfortunately, the dearth of wind observations in the tro...

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This article aims to design a kind of gripping-belt speed automatic tracking system of traditional Chinese herbal harvester by AT89C52 single-chip micro computer as a core combined with fuzzy PID control algorithm. The system can adjust the gripping-belt speed in accordance with the variation of the machine’s operation, so there is a perfect matching between the machine operation speed and the ...

We propose a system to measure the dimensions of carton boxes carried on a conveyer belt with an accuracy of 5mm, required in logistic applications. Our system estimates the dimensions through a series of depth images with relatively low resolution taken by unsynchronized multiple sensors. To achieve the accuracy, we first obtain the dimensions via the distance between parallel planes instead o...

Farmland values are often viewed as the bellwether for the U.S. farm sector. Historically, booming farm incomes have been quickly capitalized into farmland values. Over the past year, cropland values in the Corn Belt have jumped more than 25% above year ago levels according to various university and Federal Reserve surveys. Moreover, ranchland values are posting strong double-digit gains in som...

We present a new analysis of the currently available orbital elements for the known Kuiper belt objects. In the nonresonant, main Kuiper belt, we Ðnd a statistically signiÐcant relationship between an objectÏs absolute magnitude (H) and its inclination (i). Objects with H \ 6.5 (i.e., radii km for a Z170 4% albedo) have higher inclinations than those with H [ 6.5 (radii km). We have shown that ...

The Karasjok–Central Lapland Greenstone Belt is one of the largest Palaeoproterozoic greenstone belts in Fennoscandian Shield and includes multiple (ultra)mafic intrusions, some with notable ore reserves, formed during three episodes at 2.44, 2.22 2.05 Ga. This study presents new mineralogical, geochronological isotopic data for Gállojávri ultramafic intrusion, Karasjok Belt, northern Norway. P...

Data from lunar samples (Apollo, Luna, and lunar meteorites) indicate that the Moon was subjected to an intense period of bombardment around 3.85 billion year ago (Ga). Here a short review of this topic is given. Different interpretations exist, which either take this as the tail end of an intense but declining accretion period, or which consider a spike in the accretion rate at that time. The ...