2,965 research outputs found
Investigation of a Side-polished Fiber MZI and Its Sensing Performance
A novel all-fiber Mach–Zehnder interferometer (MZI), which consists of lateral core fusion splicing of a short section of side-polished single mode fiber (SMF) between two SMFs was proposed and demonstrated. A simple fiber side-polished platform was built to control the side polished depth through a microscope. The sensitivity of the fiber MZI structure to the surrounding refractive index (RI) can be greatly improved with the increase of the side-polished depth, but has no effect on the temperature sensitivity. The sensor with a polished depth of 44.2 μm measured RI sensitivity up to -118.0 nm/RIU (RI unit) in the RI range from 1.333 to 1.387, which agrees well with simulation results by using the beam propagation method (BPM). In addition, the fiber MZI structure also can achieve simultaneous measurement of both RI and temperature. These results show its potential for use in-line fiber type sensing application
Abiotic Stresses: General Defenses of Land Plants and Chances for Engineering Multistress Tolerance
Abiotic stresses, such as low or high temperature, deficient or excessive water, high salinity, heavy metals, and ultraviolet radiation, are hostile to plant growth and development, leading to great crop yield penalty worldwide. It is getting imperative to equip crops with multistress tolerance to relieve the pressure of environmental changes and to meet the demand of population growth, as different abiotic stresses usually arise together in the field. The feasibility is raised as land plants actually have established more generalized defenses against abiotic stresses, including the cuticle outside plants, together with unsaturated fatty acids, reactive species scavengers, molecular chaperones, and compatible solutes inside cells. In stress response, they are orchestrated by a complex regulatory network involving upstream signaling molecules including stress hormones, reactive oxygen species, gasotransmitters, polyamines, phytochromes, and calcium, as well as downstream gene regulation factors, particularly transcription factors. In this review, we aimed at presenting an overview of these defensive systems and the regulatory network, with an eye to their practical potential via genetic engineering and/or exogenous application
5-Amino-1-(4-nitrophenyl)-1H-pyrazole-3-carbonitrile
The title compound, C10H7N5O2, was synthesized by the reaction of 4-nitroaniline and 2,3-dicyanopropionic acid ethyl ester. In the crystal, N—H⋯O and C—H⋯O hydrogen bonds link the molecules, forming a three-dimensional network
Friend Ranking in Online Games via Pre-training Edge Transformers
Friend recall is an important way to improve Daily Active Users (DAU) in
online games. The problem is to generate a proper lost friend ranking list
essentially. Traditional friend recall methods focus on rules like friend
intimacy or training a classifier for predicting lost players' return
probability, but ignore feature information of (active) players and historical
friend recall events. In this work, we treat friend recall as a link prediction
problem and explore several link prediction methods which can use features of
both active and lost players, as well as historical events. Furthermore, we
propose a novel Edge Transformer model and pre-train the model via masked
auto-encoders. Our method achieves state-of-the-art results in the offline
experiments and online A/B Tests of three Tencent games.Comment: Accepted by the 46th International ACM SIGIR Conference on Research
and Development in Information Retrieval (SIGIR 2023
Puzzles in charmonium decays
The open charm effects via intermediate hadron loop transitions seem to play
a crucial role in the understanding of several existing "puzzles" in charmonium
exclusive decays, such as the non- decays, and
" puzzle" etc. In the charmonium energy region, non-perturbative
mechanisms could be still sizeable, and as a consequence the intermediate
hadron loop transitions also provide a mechanism for the
helicity-selection-rule (HSR) violation. We report our recent progress on those
existing puzzles.Comment: Invited talk on the 15th International Conference in QCD, June 28-
July 3, 2010, Montpellier, Franc
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