scholarly journals A new generation of dual-mode optical thermometry based on ZrO2:Eu3+ nanocrystals

Nanophotonics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 2347-2358 ◽  
Author(s):  
Jun Zhou ◽  
Ruoshan Lei ◽  
Huanping Wang ◽  
Youjie Hua ◽  
Denghao Li ◽  
...  
Keyword(s):  
High Performance ◽  
Temperature Sensitive ◽  
Nonradiative Relaxation ◽  
Temperature Dependent ◽  
Dual Mode ◽  
Optical Thermometry ◽  
New Type ◽  
Optical Thermometer ◽  
New Generation ◽  
Sensing Sensitivity

AbstractFor achieving well-performing optical thermometry, a new type of dual-mode optical thermometer is explored based on the valley-to-peak ratio (VPR) and fluorescence lifetime of Eu3+ emissions in the ZrO2:Eu3+ nanocrystals with sizes down to 10 nm. In the VPR strategy, the intensity ratio between the valley (600 nm) generated by the emission band overlap and the 606 nm peak (5D0→7F2), which is highly temperature sensitive, is employed, giving the maximum relative sensing sensitivity (Sr) of 1.8% K−1 at 293 K and good anti-interference performance. Meanwhile, the 606 nm emission exhibits a temperature-dependent decay lifetime with the highest Sr of 0.33% K−1 at 573 K, which is due to the promoted nonradiative relaxation with temperature. These results provide useful information for constructing high-performance dual-mode optical thermometers, which may further stimulate the development of photosensitive nanomaterials for frontier applications.

Broadening the valid temperature range of optical thermometry through dual-mode design

2018 ◽  
Vol 6 (41) ◽  
pp. 11178-11183 ◽  
Author(s):  
Yan Gao ◽  
Yao Cheng ◽  
Tao Hu ◽  
Zeliang Ji ◽  
Hang Lin ◽  
...  
Keyword(s):  
Dual Mode ◽  
Temperature Range ◽  
Mode Design ◽  
Optical Thermometry ◽  
Highly Sensitive ◽  
Wide Range ◽  
Optical Thermometer

This study highlights a highly sensitive dual-mode optical thermometer Pr3+:Gd2ZnTiO6 for thermal readings over a wide range of temperature.

A Study on Precipitation in Clean Micro Alloyed Steels

2001 ◽  
Vol 7 (S2) ◽  
pp. 1264-1265
Author(s):  
Yuanli Wang ◽  
Delu Liu ◽  
Jie Fu ◽  
Jian Zhu
Keyword(s):  
High Performance ◽  
Induction Furnace ◽  
Low Cost ◽  
Microalloyed Steels ◽  
Vacuum Induction Furnace ◽  
Low Carbon ◽  
Dominant Component ◽  
New Type ◽  
New Generation ◽  
Impurity Elements

Much attention has been devoted to develop the new generation of microalloyed steels in recent years to meet the needs of high performance and low cost for the 21st century. The new type of steels is characterized by reduced carbon content, improved cleanness and refined grain size through the phase transformations.11'21 Precipitation of the carbonitrides in the steels is also one of the keypoints for controlling mechanical properties of the steels.In the present work ultra-low carbon clean microalloyed steels, which contain 0.029∽0.047(wt)%C, 1.48∽1.54(wt)% Mn, 0.044∽0.052(wt)%Nb, 0.025∽0.044Ti(wt)%, 0.0015∽0.0020(wt)%B and 0.0045∽0.0070(wt)%N, were prepared in a vacuum induction furnace in laboratory. The contents of S and P of the steels are 0.0005(wt)% and 0.0010∽0.0024(wt)% respectively. Total amount of the impurity elements O, S, P and H in the steels is 0.0061∽0.0077%. Dominant component of the structure in both casting and as-forged samples is acicular ferrite or bainite.

Temperature-dependent luminescence of BaLaMgNbO6:Mn4+, Dy3+ phosphor for dual-mode optical thermometry

2019 ◽  
Vol 95 ◽  
pp. 109199 ◽  
Author(s):  
Yan Lin ◽  
Lu Zhao ◽  
Bin Jiang ◽  
Jiashan Mao ◽  
Fengfeng Chi ◽  
...  
Keyword(s):  
Temperature Dependent ◽  
Dual Mode ◽  
Optical Thermometry

scholarly journals Growth Temperature Regulation of Host-Specific Modifications of Rhizobial Lipo-Chitin Oligosaccharides: The Function of nodX Is Temperature Regulated

2000 ◽  
Vol 13 (8) ◽  
pp. 808-820 ◽  
Author(s):  
Maurien M. A. Olsthoorn ◽  
Ellen Stokvis ◽  
Johan Haverkamp ◽  
Herman P. Spaink ◽  
Jane E. Thomas-Oates
Keyword(s):  
Growth Temperature ◽  
High Performance ◽  
Rhizobium Leguminosarum ◽  
High Performance Liquid Chromatographic ◽  
Temperature Sensitive ◽  
Wild Type ◽  
Temperature Dependent ◽  
Gene Encoding ◽  
Two Temperatures ◽  
Liquid Chromatographic

Lipo-chitin oligosaccharides (LCOs) are usually produced and isolated for structural analysis from bacteria cultured under laboratory rather than field conditions. We have studied the influence of bacterial growth temperature on the LCO structures produced by different Rhizobium leguminosarum strains, using thin-layer chromatographic, high-performance liquid chromatographic, and mass spectrometric analyses. Wild-type R. leguminosarum bv. viciae A1 was shown to produce larger relative amounts of nodX-mediated, acetylated LCOs at 12°C than at 28°C, indicating that the activity of nodX (a gene encoding an LCO O-acetyl transferase) is temperature dependent. Interestingly, symbiotic resistance genes sym1 and sym2 found in primitive pea cultivars are also temperature sensitive, only being active at low temperatures, at which they block nodulation by R. leguminosarum bv. viciae strains lacking nodX. We therefore propose that the gene-for-gene relationship between plant and bacterium has a temperature-sensitive mechanism as an adaptation to environmental conditions. An R. leguminosarum bv. trifolii strain was also shown to produce larger relative amounts of nodX-mediated, acetylated LCOs at 12°C than at 28°C. The major components synthesized by the two strains are produced at both temperatures but in different relative amounts, while some minor components are only produced at one of the two temperatures.

Coumarin 7 functionalized europium-based metal–organic-framework luminescent composites for dual-mode optical thermometry

2020 ◽  
Vol 8 (38) ◽  
pp. 13328-13335
Author(s):  
Jiaqiang Liu ◽  
Xizhuang Yue ◽  
Zhuopeng Wang ◽  
Xia Zhang ◽  
Yan Xu
Keyword(s):  
Metal Organic Framework ◽  
Temperature Sensing ◽  
Dual Mode ◽  
Sensing Applications ◽  
Optical Thermometry ◽  
Metal Organic ◽  
Coumarin 7 ◽  
Optical Thermometer ◽  
Organic Framework

A Coumarin 7 functionalized Eu-MOF composite was developed as a dual-mode optical thermometer for temperature sensing applications.

Temperature-dependent luminescence of a phosphor mixture of Li2TiO3: Mn4+ and Y2O3: Dy3+ for dual-mode optical thermometry

2020 ◽  
Vol 821 ◽  
pp. 153467 ◽  
Author(s):  
Chunyan Xie ◽  
Peng Wang ◽  
Yan Lin ◽  
Xiantao Wei ◽  
Min Yin ◽  
...  
Keyword(s):  
Temperature Dependent ◽  
Dual Mode ◽  
Optical Thermometry

A new generation of highly sensitive luminescent thermometers operating in the optical window of biological tissues

2016 ◽  
Vol 4 (24) ◽  
pp. 5559-5563 ◽  
Author(s):  
Lukasz Marciniak ◽  
Artur Bednarkiewicz ◽  
Diana Kowalska ◽  
Wieslaw Strek
Keyword(s):  
High Sensitivity ◽  
Biological Tissues ◽  
Temperature Dependent ◽  
Optical Window ◽  
Highly Sensitive ◽  
New Type ◽  
New Generation ◽  
First Time

A new type of luminescent thermometer based on highly temperature dependent d–d Cr3+ transitions related to barely temperature dependent f–f Nd3+ transitions for bio-application is reported for the first time, showing exceptionally high sensitivity.

scholarly journals Ship Handling in Unprotected Waters: A Review of New Technologies in Escort Tugs to Improve Safety

2021 ◽  
Vol 2 (1) ◽  
pp. 46-62
Author(s):  
Santiago Iglesias-Baniela ◽  
Juan Vinagre-Ríos ◽  
José M. Pérez-Canosa
Keyword(s):  
High Performance ◽  
New Technologies ◽  
Weather Conditions ◽  
Hull Form ◽  
Best Available Technologies ◽  
Adverse Weather Conditions ◽  
Adverse Weather ◽  
New Type ◽  
Technological Challenge ◽  
And Performance

It is a well-known fact that the 1989 Exxon Valdez disaster caused the escort towing of laden tankers in many coastal areas of the world to become compulsory. In order to implement a new type of escort towing, specially designed to be employed in very adverse weather conditions, considerable changes in the hull form of escort tugs had to be made to improve their stability and performance. Since traditional winch and ropes technologies were only effective in calm waters, tugs had to be fitted with new devices. These improvements allowed the remodeled tugs to counterbalance the strong forces generated by the maneuvers in open waters. The aim of this paper is to perform a comprehensive literature review of the new high-performance automatic dynamic winches. Furthermore, a thorough analysis of the best available technologies regarding towline, essential to properly exploit the new winches, will be carried out. Through this review, the way in which the escort towing industry has faced this technological challenge is shown.

scholarly journals Review of Functional Treatments for Modified Wood

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 327
Author(s):  
Morwenna J. Spear ◽  
Simon F. Curling ◽  
Athanasios Dimitriou ◽  
Graham A. Ormondroyd
Keyword(s):  
High Performance ◽  
Responsive Materials ◽  
Wood Modification ◽  
Wide Range ◽  
Natural Wood ◽  
Impregnation Modification ◽  
New Applications ◽  
New Generation ◽  
Dimensional Instability ◽  
Modified Wood

Wood modification is now widely recognized as offering enhanced properties of wood and overcoming issues such as dimensional instability and biodegradability which affect natural wood. Typical wood modification systems use chemical modification, impregnation modification or thermal modification, and these vary in the properties achieved. As control and understanding of the wood modification systems has progressed, further opportunities have arisen to add extra functionalities to the modified wood. These include UV stabilisation, fire retardancy, or enhanced suitability for paints and coatings. Thus, wood may become a multi-functional material through a series of modifications, treatments or reactions, to create a high-performance material with previously impossible properties. In this paper we review systems that combine the well-established wood modification procedures with secondary techniques or modifications to deliver emerging technologies with multi-functionality. The new applications targeted using this additional functionality are diverse and range from increased electrical conductivity, creation of sensors or responsive materials, improvement of wellbeing in the built environment, and enhanced fire and flame protection. We identified two parallel and connected themes: (1) the functionalisation of modified timber and (2) the modification of timber to provide (multi)-functionality. A wide range of nanotechnology concepts have been harnessed by this new generation of wood modifications and wood treatments. As this field is rapidly expanding, we also include within the review trends from current research in order to gauge the state of the art, and likely direction of travel of the industry.

scholarly journals A study on the numerical modelling of UHPFRC-strengthened members

2018 ◽  
Vol 199 ◽  
pp. 09001
Author(s):  
Renaud Franssen ◽  
Serhan Guner ◽  
Luc Courard ◽  
Boyan Mihaylov
Keyword(s):  
Numerical Modelling ◽  
High Performance ◽  
Concrete Structures ◽  
Concrete Members ◽  
High Durability ◽  
Tension Tests ◽  
The World ◽  
Aging Infrastructure ◽  
New Generation ◽  
Modelling Approach

The maintenance of large aging infrastructure across the world creates serious technical, environmental, and economic challenges. Ultra-high performance fibre-reinforced concretes (UHPFRC) are a new generation of materials with outstanding mechanical properties as well as very high durability due to their extremely low permeability. These properties open new horizons for the sustainable rehabilitation of aging concrete structures. Since UHPFRC is a young and evolving material, codes are still either lacking or incomplete, with recent design provisions proposed in France, Switzerland, Japan, and Australia. However, engineers and public agencies around the world need resources to study, model, and rehabilitate structures using UHPFRC. As an effort to contribute to the efficient use of this promising material, this paper presents a new numerical modelling approach for UHPFRC-strengthened concrete members. The approach is based on the Diverse Embedment Model within the global framework of the Disturbed Stress Field Model, a smeared rotating-crack formulation for 2D modelling of reinforced concrete structures. This study presents an adapted version of the DEM in order to capture the behaviour of UHPFRC by using a small number of input parameters. The model is validated with tension tests from the literature and is then used to model UHPFRC-strengthened elements. The paper will discuss the formulation of the model and will provide validation studies with various tests of beams, columns and walls from the literature. These studies will demonstrate the effectiveness of the proposed modelling approach.

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