64 research outputs found
Estimation and testing for semiparametric mixtures of partially linear models
<p>In this paper, we study the estimation and inference for a class of semiparametric mixtures of partially linear models. We prove that the proposed models are identifiable under mild conditions, and then give a PL–EM algorithm estimation procedure based on profile likelihood. The asymptotic properties for the resulting estimators and the ascent property of the PL–EM algorithm are investigated. Furthermore, we develop a test statistic for testing whether the non parametric component has a linear structure. Monte Carlo simulations and a real data application highlight the interest of the proposed procedures.</p
Through-Space Conjugated Molecule with Dual Delayed Fluorescence and Room-Temperature Phosphorescence for High-Performance OLEDs
Purely organic materials with room-temperature phosphorescence
usually have much longer triplet state lifetimes than noble-metal
containing phosphorescent materials, which lead to severe exciton
quenching and inferior electroluminescence (EL) performance when applied
in organic light-emitting diodes (OLEDs). Herein, a novel through-space
conjugated molecule (2,3-PICz-XT) with dual delayed fluorescence and
room-temperature phosphorescence is developed. Owing to suitable energy
levels and strong spin–orbit coupling among excited states,
2,3-PICz-XT has short phosphorescence lifetimes at microsecond scale
and high photoluminescence quantum yields in neat and doped films.
2,3-PICz-XT can function as efficient emitters in OLEDs, providing
high external quantum efficiencies (ηexts) of up
to 32.73% with small efficiency roll-offs. It can also efficiently
sensitize various phosphorescent and thermally activated delayed fluorescence
(TADF) materials to yield excellent EL performances. Impressively,
the hyperfluorescence OLEDs using 2,3-PICz-XT as sensitizer for multiple
resonance TADF materials attain narrow EL spectra and greatly improved
ηexts over 35%. To the best of our knowledge, 2,3-PICz-XT
is the most efficient emitter and sensitizer ever reported for dual
delayed fluorescence and phosphorescence materials
Through-Space Conjugated Molecule with Dual Delayed Fluorescence and Room-Temperature Phosphorescence for High-Performance OLEDs
Purely organic materials with room-temperature phosphorescence
usually have much longer triplet state lifetimes than noble-metal
containing phosphorescent materials, which lead to severe exciton
quenching and inferior electroluminescence (EL) performance when applied
in organic light-emitting diodes (OLEDs). Herein, a novel through-space
conjugated molecule (2,3-PICz-XT) with dual delayed fluorescence and
room-temperature phosphorescence is developed. Owing to suitable energy
levels and strong spin–orbit coupling among excited states,
2,3-PICz-XT has short phosphorescence lifetimes at microsecond scale
and high photoluminescence quantum yields in neat and doped films.
2,3-PICz-XT can function as efficient emitters in OLEDs, providing
high external quantum efficiencies (ηexts) of up
to 32.73% with small efficiency roll-offs. It can also efficiently
sensitize various phosphorescent and thermally activated delayed fluorescence
(TADF) materials to yield excellent EL performances. Impressively,
the hyperfluorescence OLEDs using 2,3-PICz-XT as sensitizer for multiple
resonance TADF materials attain narrow EL spectra and greatly improved
ηexts over 35%. To the best of our knowledge, 2,3-PICz-XT
is the most efficient emitter and sensitizer ever reported for dual
delayed fluorescence and phosphorescence materials
Additional file 1: Table S1. of Early post-traumatic seizures are associated with valproic acid plasma concentrations and UGT1A6/CYP2C9 genetic polymorphisms in patients with severe traumatic brain injury
Genetic polymorphism, gender, and sex in association with VPA concentrations, VPA dosages and early post-traumatic seizures. (DOCX 25 kb
Construction of Multifunctional Hydrogels via a Supramolecular Self-Assembled Strategy with Ultrahigh Sensitivity to Strain Responsiveness
Intelligent electronic devices have been diffusely used
in health
detection, energy storage, and biomedicine based on their autonomy,
flexibility, and adaptive improvement, but traditional materials have
the drawbacks of limited flexibility, instability, and inadequate
reusability. Herein, poly(acrylic acid)-based hydrogels with efficient
self-healing performance and high-precision sensing performance were
constructed by a supramolecular self-assembled strategy based on electrostatic
interactions, metal coordination, and hydrogen bonds. This hydrogel
exhibited a tensile strength of 102.9 kPa and an elongation at break
of 990% with good fatigue resistance and self-recovery ability. The
hydrogel also displayed good light transmission and UV-shielding effects,
as well as good adhesion ability on different materials. Besides,
the hydrogel had an electrical conductivity of 0.98 S/m, which could
light up a light-emitting diode (LED) bulb when connected in a circuit.
Based on these great features, the hydrogel exhibited ultrahigh sensitivity
with gauge factor values of 4.00 and 17.00 within the strain ranges
of 0–200 and 600–800%, respectively. The hydrogel could
be applied not only for large human movements but also for detecting
subtle movements. Most importantly, the hydrogel exhibited a great
self-healing property, which could almost self-heal within 6 h with
a healing efficiency of 99%. Therefore, this work provides a multifunctional
hydrogel construction method, and the prepared hydrogels displayed
great potential application in the strain sensor field
Construction of Multifunctional Hydrogels via a Supramolecular Self-Assembled Strategy with Ultrahigh Sensitivity to Strain Responsiveness
Intelligent electronic devices have been diffusely used
in health
detection, energy storage, and biomedicine based on their autonomy,
flexibility, and adaptive improvement, but traditional materials have
the drawbacks of limited flexibility, instability, and inadequate
reusability. Herein, poly(acrylic acid)-based hydrogels with efficient
self-healing performance and high-precision sensing performance were
constructed by a supramolecular self-assembled strategy based on electrostatic
interactions, metal coordination, and hydrogen bonds. This hydrogel
exhibited a tensile strength of 102.9 kPa and an elongation at break
of 990% with good fatigue resistance and self-recovery ability. The
hydrogel also displayed good light transmission and UV-shielding effects,
as well as good adhesion ability on different materials. Besides,
the hydrogel had an electrical conductivity of 0.98 S/m, which could
light up a light-emitting diode (LED) bulb when connected in a circuit.
Based on these great features, the hydrogel exhibited ultrahigh sensitivity
with gauge factor values of 4.00 and 17.00 within the strain ranges
of 0–200 and 600–800%, respectively. The hydrogel could
be applied not only for large human movements but also for detecting
subtle movements. Most importantly, the hydrogel exhibited a great
self-healing property, which could almost self-heal within 6 h with
a healing efficiency of 99%. Therefore, this work provides a multifunctional
hydrogel construction method, and the prepared hydrogels displayed
great potential application in the strain sensor field
Construction of Multifunctional Hydrogels via a Supramolecular Self-Assembled Strategy with Ultrahigh Sensitivity to Strain Responsiveness
Intelligent electronic devices have been diffusely used
in health
detection, energy storage, and biomedicine based on their autonomy,
flexibility, and adaptive improvement, but traditional materials have
the drawbacks of limited flexibility, instability, and inadequate
reusability. Herein, poly(acrylic acid)-based hydrogels with efficient
self-healing performance and high-precision sensing performance were
constructed by a supramolecular self-assembled strategy based on electrostatic
interactions, metal coordination, and hydrogen bonds. This hydrogel
exhibited a tensile strength of 102.9 kPa and an elongation at break
of 990% with good fatigue resistance and self-recovery ability. The
hydrogel also displayed good light transmission and UV-shielding effects,
as well as good adhesion ability on different materials. Besides,
the hydrogel had an electrical conductivity of 0.98 S/m, which could
light up a light-emitting diode (LED) bulb when connected in a circuit.
Based on these great features, the hydrogel exhibited ultrahigh sensitivity
with gauge factor values of 4.00 and 17.00 within the strain ranges
of 0–200 and 600–800%, respectively. The hydrogel could
be applied not only for large human movements but also for detecting
subtle movements. Most importantly, the hydrogel exhibited a great
self-healing property, which could almost self-heal within 6 h with
a healing efficiency of 99%. Therefore, this work provides a multifunctional
hydrogel construction method, and the prepared hydrogels displayed
great potential application in the strain sensor field
Construction of Multifunctional Hydrogels via a Supramolecular Self-Assembled Strategy with Ultrahigh Sensitivity to Strain Responsiveness
Intelligent electronic devices have been diffusely used
in health
detection, energy storage, and biomedicine based on their autonomy,
flexibility, and adaptive improvement, but traditional materials have
the drawbacks of limited flexibility, instability, and inadequate
reusability. Herein, poly(acrylic acid)-based hydrogels with efficient
self-healing performance and high-precision sensing performance were
constructed by a supramolecular self-assembled strategy based on electrostatic
interactions, metal coordination, and hydrogen bonds. This hydrogel
exhibited a tensile strength of 102.9 kPa and an elongation at break
of 990% with good fatigue resistance and self-recovery ability. The
hydrogel also displayed good light transmission and UV-shielding effects,
as well as good adhesion ability on different materials. Besides,
the hydrogel had an electrical conductivity of 0.98 S/m, which could
light up a light-emitting diode (LED) bulb when connected in a circuit.
Based on these great features, the hydrogel exhibited ultrahigh sensitivity
with gauge factor values of 4.00 and 17.00 within the strain ranges
of 0–200 and 600–800%, respectively. The hydrogel could
be applied not only for large human movements but also for detecting
subtle movements. Most importantly, the hydrogel exhibited a great
self-healing property, which could almost self-heal within 6 h with
a healing efficiency of 99%. Therefore, this work provides a multifunctional
hydrogel construction method, and the prepared hydrogels displayed
great potential application in the strain sensor field
Construction of Multifunctional Hydrogels via a Supramolecular Self-Assembled Strategy with Ultrahigh Sensitivity to Strain Responsiveness
Intelligent electronic devices have been diffusely used
in health
detection, energy storage, and biomedicine based on their autonomy,
flexibility, and adaptive improvement, but traditional materials have
the drawbacks of limited flexibility, instability, and inadequate
reusability. Herein, poly(acrylic acid)-based hydrogels with efficient
self-healing performance and high-precision sensing performance were
constructed by a supramolecular self-assembled strategy based on electrostatic
interactions, metal coordination, and hydrogen bonds. This hydrogel
exhibited a tensile strength of 102.9 kPa and an elongation at break
of 990% with good fatigue resistance and self-recovery ability. The
hydrogel also displayed good light transmission and UV-shielding effects,
as well as good adhesion ability on different materials. Besides,
the hydrogel had an electrical conductivity of 0.98 S/m, which could
light up a light-emitting diode (LED) bulb when connected in a circuit.
Based on these great features, the hydrogel exhibited ultrahigh sensitivity
with gauge factor values of 4.00 and 17.00 within the strain ranges
of 0–200 and 600–800%, respectively. The hydrogel could
be applied not only for large human movements but also for detecting
subtle movements. Most importantly, the hydrogel exhibited a great
self-healing property, which could almost self-heal within 6 h with
a healing efficiency of 99%. Therefore, this work provides a multifunctional
hydrogel construction method, and the prepared hydrogels displayed
great potential application in the strain sensor field
Enhancing the Hg(II) Removal Efficiency from Real Wastewater by Novel Thymine-Grafted Reduced Graphene Oxide Complexes
In
this study, the reduced graphene oxide was modified by grafting
thymine on its surface. The resultant reduced graphene oxide-thymine
composite (rGO-Thy) exhibits a higher HgÂ(II) adsorption capacity and
selectivity compared with rGO as the functional group of thymine shows
a strong affinity toward HgÂ(II) and forms the thymine-HgÂ(II)-thymine
complex. The relative selectivity coefficients of rGO-Thy for HgÂ(II)/PbÂ(II),
Hg (II)/NiÂ(II), Hg (II)/CoÂ(II), Hg (II)/CuÂ(II), and HgÂ(II)/CdÂ(II)
are 21.72, 7.08, 5.37, 4.37, and 10.51, respectively. This is mainly
attributed to the thymine-specific binding with HgÂ(II). In addition,
the adsorption capacity of rGO-Thy for HgÂ(II) is almost 2 times higher
than reduced graphene oxide (rGO). Kinetics studies indicate that
the adsorption process fits well with the pseudo-second-order model,
and the adsorption kinetic constant is 0.02 g·mg<sup>–1</sup>·min<sup>–1</sup>. Moreover, the practical application
of rGO-Thy achieves almost 100% removal efficiency, and the treatment
volumes of actual industrial wastewater using a fixed bed column are
as high as 390 BV for HgÂ(II), which indicates that rGO-Thy has great
potential in advanced wastewater treatment
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