A5100742878- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Water Quality Monitoring Technologies
- Astrophysics and Star Formation Studies
- Advanced Neural Network Applications
- Membrane Separation Technologies
- Advanced oxidation water treatment
- Astrophysical Phenomena and Observations
- Aquaculture Nutrition and Growth
- Pulsars and Gravitational Waves Research
- Radio Wave Propagation Studies
- Domain Adaptation and Few-Shot Learning
- Face recognition and analysis
- Face and Expression Recognition
- Nanoparticles: synthesis and applications
- Advanced Nanomaterials in Catalysis
- Satellite Communication Systems
- Water Quality Monitoring and Analysis
- Marine Bivalve and Aquaculture Studies
- Microplastics and Plastic Pollution
- Solar-Powered Water Purification Methods
Chinese Academy of Sciences
2014-2025
National Astronomical Observatories
2014-2025
Institute of Oceanology
2021-2024
Guangzhou University
2024
National Space Science Center
2018-2024
Taizhou University
2024
Zhaotong University
2014-2023
Guangxi University
2020-2023
Institute of Microelectronics
2021-2023
Qingdao National Laboratory for Marine Science and Technology
2021-2022
Due to ionosphere absorption and the interference of natural artificial radio emissions, astronomical observation from ground becomes very difficult at wavelengths decametre or longer, which we shall refer as ultralong wavelengths. This unexplored part electromagnetic spectrum has potential for great discoveries, notably in study cosmic dark ages dawn, but also heliophysics space weather, planets exoplanets, ray neutrinos, pulsar interstellar medium (ISM), extragalactic sources, so on. The...
The effects of the photocatalytic toxicity titanium dioxide nanoparticle (nano-TiO2) on phytoplankton are well understood. However, as UV light intensity decreases sharply with depth water column, nano-TiO2 itself deeper phytoplankton, such green algae, need further research. In this research, we investigated three sizes TiO2 (10, 50 and 200 nm) photosynthetic antioxidative processes Scenedesmus obliquus in absence light. We found that nm 10 (10 mg/L) inhibited growth rates maximal...
Precise feeding in the recirculating aquaculture mode is a critical scientific problem that urgently needs solution. This study aimed to develop an intelligent technique system for rearing Litopenaeus vannamei. The core of shrimp biomass prediction model. Accurate could determine appropriate amount and ensure stable water quality. data-driven model was developed based on quality indicators management data collected during rearing. Multiple linear regression, artificial neural networks...
Water quality early warning is a key aspect in industrial recirculating aquaculture systems for high-density shrimp farming. The concentrations of ammonia nitrogen and nitrite the water significantly impact cultured animals are challenging to measure real-time, posing substantial challenge technology. This study aims collect data samples using low-cost sensors during process construct predictive values nitrite, which difficult obtain through environment, prediction techniques. employs...
Face recognition algorithms based on deep learning methods have become increasingly popular. Most of these are highly precise but complex convolutional neural networks (CNNs), which require significant computing resources and storage, difficult to deploy mobile devices or embedded terminals. In this paper, we propose several improve the for face a lightweight CNN, is further optimized in terms network architecture training pattern basis MobileFaceNet. Regarding architecture, introduce...
Abstract The aim of this study was to provide technical means and data support for enhancing the filtration pretreatment capacity a recirculating aquaculture system. A continuous flow electrocoagulation (EC)–filtration system designed its application in marine wastewater studied. influences anode combination modes, hydraulic retention times (HRTs) EC reactor filter pore sizes on water treatment were investigated. Results showed that could significantly enhance efficiency equipment used...
A moving bed biofilm reactor (MBBR) is an efficient water treatment process, widely used in recirculating aquaculture systems.
Abstract The ExoEcho project is designed to study the photodynamics of exoplanets by leveraging high-precision transit timing data from ground- and space-based telescopes. Some are experiencing orbital decay, variation (TTV) a useful technique their period variations. In this study, we have obtained middle-time Hubble Space Telescope observations for 37 short-period exoplanets, most which hot Jupiters. To search potential long- short-term variations within sample, conduct TTV model fitting...
Abstract Planets residing within the hot-Neptune Desert are rare, and studying their atmospheres can provide valuable insights into formation evolutionary processes. We present atmospheric characterization of first known ultra-hot Neptune, LTT-9779 b, using transmission spectroscopic observations obtained with HST/WFC3 G141 G102 grisms. Using Iraclis pipeline TauREx3 retrieval code, we find that b likely possesses a H/He-dominated primary atmosphere an opaque aerosol layer pure cloudy,...
Few-shot image classification (FSIC) is the task of generalizing a model to unknown categories by learning from small number labeled samples some given categories. Recently, metric-based approaches have received lots attention for their simplicity and effectiveness, but they often only use support set generate inaccurate prototypes matching query set, ignoring rich information contained in queries reversibility relationship between two. In this letter, we propose new simple effective method...
We are using archived data from HST of transiting exoplanet L~98-59~b to place constraints on its potentially hot atmosphere. analyze the five transit visits and extract final combined transmission spectrum Iraclis. Then we use inverse atmospheric retrieval code TauREx spectrum. There is a weak absorption feature near 1.40~$\mu m$ 1.55~$\mu in spectrum, which can be modeled by cloudy atmosphere with abundant HCN. However, unrealistically high abundance HCN derived cannot explained any...
The nearby bright M-dwarf star L~98-59 has three terrestrial-sized planets. One challenge remaining in characterizing atmospheres around such planets is that it not known a priori whether they possess any atmospheres. Here we report the study of L~98-59~c and L~98-59~d using near-infrared spectral data from G141 grism HST/WFC3. We can reject hypothesis clear atmosphere dominated by hydrogen helium at confidence level $\sim$ 3~sigma for both Thus may have primary hydrogen-dominated with an...
A recirculating aquaculture system (RAS) can reduce water and land requirements for intensive production. However, a traditional RAS uses fixed circulation flow rate treatment. In general, the in an is highly turbid only when animals are fed they excrete. Therefore, quality regulation technology based on process control proposed this paper. The intelligent variable-flow was designed circulating pump-drum filter linkage working model. Machine learning methods were introduced to develop model...
Electrocoagulation (EC) is an environmentally friendly and effective water treatment technique. It has been recently applied in combination with a filtration process. This study investigated the effects of alternating pulse current (APC) on electrodes, efficiency, energy consumption EC−filtration system during mariculture tailwaters, from aspects density conversion period (CCP), to generate ideas for improving performance system. Results showed that using direct (DC) would aggravate...
Abstract We report a very bright, long-duration gamma-ray burst (GRB), GRB 220426A, observed by the Fermi satellite. with total duration of T 90 = 6 s, is composed two main pulses and some subpeaks. The spectral analysis this Band function reveals that both time-integrated time-resolved spectra are narrow high α ≳ 0.2 low β ≲ −3.1. It highly reminiscent 090902B, special photospheric emission identification. Then, we perform based on nondissipated emission, which can be well modeled...
This study aimed to improve the performance of continuous flow electrocoagulation (EC)-microscreen drum filter (MDF) system in treating mariculture wastewater by investigating passivation behavior electrodes under different factors. Using response surface methodology, effects salinity (10–30‰), current density (15–75 A/m2), inlet (100–300 L/h), and electrode's working time (without polarity change) (8–40 min) on efficiency, total suspended solids (TSS) removal, cathode, energy consumption...
低频射电探测任务构想——鸿蒙计划旨在利用多颗卫星绕月编队形成超长波天文观测阵列,在月球背面开展空间低频射电天文探测。其科学目标是高精度测量全天射电频谱,揭示宇宙黑暗时代与黎明的演化历史;实现首次高分辨率超长波巡天,打开最后一个电磁窗口;观测太阳和行星超长波活动,揭示空间环境相互作用规律。该任务将获得超长波频段全天空图像,获取超长波波段天文射电源的强度、频谱、分布等信息。这些科学数据对于探索宇宙黑暗时代和黎明时代、研究银河系星际介质、宇宙线起源与传播、河外射电星系、类星体和星系团的演化、太阳活动与行星磁场等,具有重要的科学价值。
3D point cloud object detection is of great significance in autonomous driving, robotics, and related fields. However, the current algorithms fail to fully consider that positive sample points a exclusively reside on its surface, resulting decreased accuracy. High-quality classification are located centrally, while high-quality regression predominantly situated at boundary. We propose an anchor-free algorithm called Valuable Region Point (VRVP), aiming address inconsistency between tasks....