Comparative investigation on installation space requirements for input filters of DC-link- and matrix converters based on amplitude pseudo-spectra

2012 ◽  
Author(s):  
A. Schramm ◽  
H. Lanfer ◽  
J. Petzoldt ◽  
U. Radel ◽  
H. Schwarzmann ◽  
...  
Keyword(s):  
Comparative Investigation ◽  
Installation Space ◽  
Matrix Converters ◽  
Space Requirements

scholarly journals Design and Implementation of Highly Integrated Electronic System for Small-Size Spacecraft

2021 ◽  
Author(s):  
Xinfeng Yan ◽  
Wei Liu ◽  
Gaosi Li ◽  
Jian Geng
Keyword(s):  
Power Distribution ◽  
Electromagnetic Compatibility ◽  
Lightweight Design ◽  
Electronic System ◽  
Installation Space ◽  
Good Effect ◽  
Design Technology ◽  
Orbit Control ◽  
Differential Positioning ◽  
Space Requirements

Due to the tight installation space, strict weight requirements, numerous functional units and dense wireless equipments of small-size spacecraft, the traditional electronic system design of aircraft cannot meet the requirements of miniaturization and lightweight for small-size spacecraft. In this paper, a highly integrated electronic system suitable for small-size spacecraft is designed, in which many key technologies such as miniaturization and lightweight design technology, multi frequency wireless electromagnetic compatibility design technology, small aircraft low delay cooperative networking and high-precision differential positioning are adopted. The proposed highly integrated electronic system makes timing control, attitude and orbit control, wireless telemetry, networking communication, satellite navigation, power distribution and other functions integrated. The total weight of the system is about 7.62kg, which is much lighter than existing electronic system. The experiment results that the highly integrated electronic system achieves good effect. This technology has broad application prospects in small-size aircraft with strict weight and space requirements.

Transitioning Business for a Circular Economy

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Susan EVANS
Keyword(s):  
Professional Practice ◽  
Circular Economy ◽  
Radical Change ◽  
Virtual Space ◽  
Professional Experience ◽  
Operational Model ◽  
New Vision ◽  
To Come ◽  
Space Requirements

This case study explores the strategic business opportunities, for Lane Crawford, an iconic luxury department store, to transition in a circular economy towards sustainability. A new experimentation framework was developed and conducted among cross departmental employees, during a Design Lab, with intention to co-create novel Circular Economy business concepts towards a new vision: the later was a reframe of the old system based on the principles of sustainability; to move beyond a linear operational model towards a circular economy that can contribute to a regenerative society. This work draws on both academic and professional experience and was conducted through professional practice. It was found that innovative co-created concepts, output from the Design Lab, can create radical change in a circular economy that is holistically beneficial and financially viable; looking forward to extract greater value a)Internal organization requires remodeling to transform towards a circular economy; b)Requirement for more horizonal teams across departments vs solely vertical; c)New language and relationships are required to be able to transition towards a circular economy; d)Some form of physical and virtual space requirements, for cross-disciplinary teams to come together to co-create; e)Ability to iterate, learn and evolve requires agency across the business

Duty Cycles for Three-Phase of Three-Phase Matrix Converters

2011 ◽  
Vol 131 (9) ◽  
pp. 1173-1174 ◽  
Author(s):  
Inami Asai ◽  
Takaharu Takeshita
Keyword(s):  
Matrix Converters ◽  
Duty Cycles ◽  
Three Phase

Comparative Study of the Biologically Active Substances Composition and Content in Meadowsweet (Filipendula ulmaria (L.) Maxim) Crude Herbal Drugs (Herb, Leafs, Flowers) of Russian Origin

2018 ◽  
Vol 9 (3) ◽  
Author(s):  
Dmitry Olegovich Bokov ◽  
Tatyana Yuryevna Kovaleva ◽  
Valentina Alekseevna Ermakova ◽  
Daria Aleksandrovna Trashchenkova ◽  
Ekaterina Anatolievna Dorovskih ◽  
...  
Keyword(s):  
Traditional Medicine ◽  
Neurotropic Activity ◽  
Comparative Investigation ◽  
Biologically Active ◽  
Total Flavonoids ◽  
Herbal Drugs ◽  
Filipendula Ulmaria ◽  
Pharmacopoeial Monograph ◽  
Total Extractives ◽  
Layer Chromatography

Filipendula ulmaria (L.) Maxim. (Meadowsweet) is known in traditional medicine as anti-inflammatory, wound-healing,astringent and antibacterial remedy. However recent studies show that it also has neurotropic activity. In Russia meadowsweet flowers are used as crude herbal drugs (temporary pharmacopoeial monograph 42-1777-87), also leafs and herb are used in the traditional medicine. Objective of the study was to carry out comparative investigation of composition and content of major biologically active compounds (BAC) in Filipendula ulmaria herb, flowers and leafs by thin-layer chromatography, differential spectrophotometry with aluminum chloride reagent (total flavonoids in terms of rutoside), gravimetry (total extractives, extracted by water), permanganatometric titration (total tannins in terms of tannin). Rutoside, tannin, gallic acid and salicylic acid were identified in Filipendula ulmaria herb, flowers and leafs by TLC. Also we analyzed content of substances extracted by water, flavonoids and tannins. Total extractives, extracted by water in F. ulmaria herb is 13.12±0.10%, in leafs – 13.98±0.37%, in flowers – 18.09±0.17%. Total tannins in F. ulmaria herb is 11.87±0.47%, in leafs – 12.06±0.18%, in flowers – 12.26±0.29%. Total flavonoids in F. ulmaria herb 4.34±0.17%, in leafs – 6.98±0.23%, in flowers – 11.75±0.57%. The obtained data will be used for development of a pharmacopoeial monograph project "Filipendula ulmaria (L.) Maxim., herba" for inclusion in the State Pharmacopoeia of the Russian Federation.

Peculiarities of AD33 aluminum alloy hand laser welding

2020 ◽  
Vol 2020 (12) ◽  
pp. 13-17
Author(s):  
Nikolay Proskuryakov ◽  
Uliana Putilova ◽  
Rasul Mamadaliev ◽  
Oleg Teploukhov
Keyword(s):  
Aluminum Alloy ◽  
Laser Beam ◽  
Laser Welding ◽  
Welded Joint ◽  
Comparative Investigation ◽  
Micro Structure ◽  
Joint Quality ◽  
Beam Motion

The comparative investigation results of AD33 aluminum alloy welded joint quality dependence upon changes in a laser beam motion rate for conditions of hand and automatic laser welding are shown. A micro-structure of a welded joint at the hand and automatic laser welding of the AD33 alloy is investigated.

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