Results 21 to 30 of about 5,286,668 (304)

How Wood Fuels\u2019 Quality Relates to the Standards: A Class-Modelling Approach [PDF]

open access: yes, 2017
The quality requirements of wood biofuels are regulated by a series of harmonized international standards. These standards define the technical parameter limits that influence the quality of solid biomass as a fuel.
Cavalli, Raffaele   +5 more
core   +3 more sources

Redefinition of the SI Base Units: Its Background and Principle [PDF]

open access: yes한국정밀공학회지, 2018
The International System of Units (acronym: SI) is founded on seven base units (meter, kilogram, second, ampere, kelvin, mole, and candela) corresponding to seven base quantities (length, mass, time, electric current, thermodynamic temperature, amount of
Ho Seong Lee
doaj   +1 more source

The weak frequency anomaly detection method of atomic clocks based on Kalman filter and extrapolation-accumulation

open access: yesMeasurement + Control, 2021
A new method based on the innovation of Kalman filter and extrapolation-accumulation is proposed to detect weak frequency anomalies in atomic clocks with short detection time and high detection probability. In this method, the detection statistics of the
Ran Yan   +4 more
doaj   +1 more source

A Real-Time GPP Software-Defined Radio Testbed for the Physical Layer of Wireless Standards [PDF]

open access: yes, 2005
We present our contribution to the general-purpose-processor-(GPP)-based radio. We describe a baseband software-defined radio testbed for the physical layer of wireless LAN standards.
Hoeksema, F.W.   +2 more
core   +5 more sources

Top-Down and Bottom-Up Urban and Regional Planning: Towards a Framework for The Use of Planning Standards [PDF]

open access: yes, 2014
The purpose of this paper is to discuss the ways that the top-down and the bottom-up approaches to planning can be combined in the practice of planning standards.
Pissourios, Ioannis A.
core   +1 more source

P-step Kalman-like unbiased FIR algorithm for detecting anomalies of atomic clocks

open access: yesMeasurement + Control, 2023
An extended measurement model anomaly detection algorithm for atomic clocks is proposed based on the p-step Kalman-like iterative Unbiased finite impulse response (UFIR) algorithm. The novel of the proposed algorithm is that it breaks the disadvantage of
Ran Yan   +3 more
doaj   +1 more source

Hybrid InP and SiN integration of an octave-spanning frequency comb

open access: yesAPL Photonics, 2021
Implementing optical-frequency combs with integrated photonics will enable wider use of precision timing signals. Here, we explore the generation of an octave-span, Kerr-microresonator frequency comb using hybrid integration of an InP distributed ...
Travis C. Briles   +9 more
doaj   +1 more source

Development of Analytical Methods for Calculating Time Standards for Shunting Operations

open access: yesNauka ta progres transportu, 2021
Purpose. The article is aimed to conduct a historical analysis of the development of analytical methods for standardizing the duration of shunting operations, as well as assessing their compliance with the existing operating conditions of railway ...
D. M Kozachenko   +2 more
doaj   +1 more source

Time to Standardize Taxonomies [PDF]

open access: yesSystematic Biology, 2007
Taxonomic assignments are grossly nonstandardized in current biological classifications. For example, some genera such as Drosophila are an order of magnitude older than others such as Pan or Gorilla; and, further more, because of an "apples-versus-oranges" problem, a genus-level (or any other) designation for particular assemblages of fruit flies and ...
Avise, John C, Mitchell, Dale
openaire   +4 more sources

Raising standards and tackling workload: a national agreement: time for standards [PDF]

open access: yes, 2003
"This document represents an historic national Agreement between Government, employers and school workforce unions to help schools, teachers and support staff meet the challenges that lie ahead.

core  

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