Extraction - Science topic

Call for papers for the Special Issue of the journal of "Minerals": Beneficiation and Extraction of Lithium, Tantalum and Niobium from Ores and Secondary Resources Researchers work related to battery minerals and/or critical minerals are mostly welcome to submit your manuscripts to this special issue.

This study aimed to optimize the ultrasound-assisted extraction (UAE) of total anthocyanins from two stages of ripening purple tomatoes (low and high) and to compare the optimized extraction with the conventional one. In the optimization of UAE, the studied variables were time (5 to 75 min), temperature (30 to 70 °C), and solid: liquid ratio (1:5 t...

As a traditional Chinese medicine, Angelica dahurica has significant medicinal and nutritional value. To optimize the extraction of flavonoids from Angelica dahurica and enhance its medicinal value, this study was conducted to optimize the process using response surface methodology and investigated the effects of ultrasonication time, ethanol conce...

AOX เป็นสารประกอบที่เกิดจากการทำปฏิกิริยาระหว่างลิกนินในเส้นใยธรรมชาติกับคลอรีนหรือสารประกอบคลอรีนในกระบวนการฟอก สารประกอบนี้มีความเสถียรสูง สลายตัวยาก มีความเป็นพิษ สามารถสะสมในสิ่งมีชีวิตได้ ทำให้เกิดความเสียหายในระดับพันธุกรรมทั้งในมนุษย์และสัตว์ ส่งผลเสียต่อการเจริญเติบโตของพืชและระบบต่อมไร้ท่อของสัตว์ การตรวจหาและลดปริมาณ AOX จึงเป็นประเด็นสำค...

Research on a combined method of chlorination roasting of a mechanically activated antimony sulfide concentrate from the Anzob Mining and Processing Plant in the Republic of Tajikistan with sodium chloride was carried out. The influence of the main factors-temperature, processing time, charge composition-has been determined which allowed an almost...

This article presents the mineralogical and chemical characteristics of zinc and lead smelting slags, with particular reference to the slags formed during the simultaneous production of Zn and Pb by the Imperial Smelting Process. These slags, because of the presence of many metals in their composition, mainly in the form of crystalline phases, are...

Aiming at the problems of low detection accuracy and the large size of the pedestrian detection algorithm, to improve the edge intelligent recognition capability of the terminal, this paper proposes a lightweight pedestrian detection scheme based on the improved YOLOv5. In this paper, the algorithm first takes the original YOLOv5 as the basic frame...

This review was sought to comparatively explore how irrigation technological interven-9 tions could help to overcome water security challenges in India and Africa. Retrieved literature in-10 dicated that as part of the global south, India and Africa have an untapped irrigation potential due 11 to adoption of individual-centric irrigation. Unlike in...

Identifying impacts of extraction and processing of energy sources on the environment.

p>This research introduces the Contextualized Pair-Relationship Guided Mixture-of-Experts (CPRG-MoE) model for Emotion–Cause Pair Extraction in Conversation (ECPEC), a task that identifies emotions and their causes in conversation. The model integrates conversational context and dialogue features, addressing previous studies' limitations in utilizi...

An improved method of extracting small-signal equivalent circuit model parameters for gallium nitride high electron mobility transistors (GaN HEMTs) is presented. This paper intends to present a method to extract the parasitic inductance and resistance of transistors based on the short-test structure without the open-circuit test structure. The par...

p>This research introduces the Contextualized Pair-Relationship Guided Mixture-of-Experts (CPRG-MoE) model for Emotion–Cause Pair Extraction in Conversation (ECPEC), a task that identifies emotions and their causes in conversation. The model integrates conversational context and dialogue features, addressing previous studies' limitations in utilizi...

Phase-shifting profilometry (PSP) is the most widely used wrapped phase extraction method due to the advantages of high accuracy and resolution, robust to noise. However, due to the local specular reflection of the measured surfaces and the limited camera dynamic range, some pixels of the captured fringes become intensity saturated, thus introducin...

This paper presents an overview of the uses of the combination of eye tracking and artificial intelligence. In the paper, several aspects of both eye tracking and applied AI methods have been analyzed. It analyzes the eye tracking hardware used along with the sampling frequency, the number of test participants, additional parameters, the extraction...

Aiming at challenges such as the high complexity of the network model, the large number of parameters, and the slow speed of training and testing in cross-view gait recognition, this paper proposes a solution: Multi-teacher Joint Knowledge Distillation (MJKD). The algorithm employs multiple complex teacher models to train gait images from a single...

A simple explanation of electronic extraction using the turnitin program

Predicting energy consumption in large exposition centers presents a significant challenge, primarily due to the limited datasets and fluctuating electricity usage patterns. This study introduces a cutting-edge algorithm, the contrastive transformer network (CTN), to address these issues. By leveraging self-supervised learning, the CTN employs cont...

Coal and gas outburst is a complex dynamic disaster during coal underground mining. Revealing the disaster mechanism is of great significance for accurate prediction and prevention of coal and gas outburst. The geo-dynamic system of coal and gas outburst is proposed. The framework of geo-dynamic system is composed of gassy coal mass, geological dyn...

We investigated DNA extraction methods with regard to cryopreserved tissue samples for personalized molecular testing

In recent years, artificial neural networks (ANNs) have been successfully and widely used in multivariate time series prediction, but the accuracy of the prediction is significantly affected by the ANNs’ input. In order to determine the appropriate input for more accurate prediction, a weighted slow feature analysis-based adaptive feature extractio...

Marine environmental DNA (eDNA) collection, filtration, preservation, and extraction protocol used in Galápagos fieldwork 2021-2023, and Gulf of California fieldwork in 2023 by Eldridge Wisely.

The objective of event extraction is to recognize event triggers and event categories within unstructured text and produce structured event arguments. However, there is a common phenomenon of triggers and arguments of different event types in a sentence that may be the same word elements, which poses new challenges to this task. In this article, a...

Although the Mask region-based convolutional neural network (R-CNN) model possessed a dominant position for complex and variable road scene segmentation, some problems still existed, including insufficient feature expressive ability and low segmentation accuracy. To address these problems, a novel road scene segmentation algorithm based on the modi...

Knowledge graphs facilitate the extraction of knowledge from data and provide a comprehensive overview of all knowledge within departments, across departments, and global organizations. To enrich the extracted knowledge, several solutions have been proposed to complete the knowledge graph. This study investigates the effectiveness of using the sele...

Extraction mining face in a epidot ampglhibolite decorative mine in ophilite melange of South of Birjand, East of Iran

Extraction mining face in a splilitic decorative mine in ophilite melange of South of Birjand, East of Iran

Due to the recent trend of unmanned economy, retail stores have gradually reduced their service and cashier manpower. The retail product recognition becomes one of key issues for unmanned shopping. Although the success of deep neural networks has made object recognition feasible in a variety of applications, it still struggles to perform well on a...

Extraction mining face in a metasplilitic decorative mine in ophilite melange of South of Birjand, East of Iran

This study explored human ability to extract closed boundary of a target shape in the presence of noise using spatially global operations. Specifically, we investigated the contributions of contour-based processing using line edges and region-based processing using color, as well as their interaction. Performance of the subjects was reliable when t...

Attention mechanism takes a crucial role among the key technologies in transformer-based visual tracking. However, the current methods for attention computing neglect the correlation between the query and the key, which results in erroneous correlations. To address this issue, a CWCTrack framework is proposed in this study for transformer visual tr...

INTRODUCTION L’objectif général de ce travail a été de mettre au point des suppositoires contenant des microparticules à base de poudre d’écorces de Landolphia owariensis qui présentera une absorption rectale contrôlée et prolongée en vue d’améliorer l’observance thérapeutique des crises hémorroïdaires. MATERIEL ET METHODES Après extraction le déco...

Direct studies of the adiabatic temperature change (ΔTad) in the Ni47Mn40Sn12.5Cu0.5 Heusler alloy in steady magnetic fields up to 8 T by the extraction method and in pulsed magnetic fields up to 50 T were carried out in this paper. The alloy Ni47Mn40Sn12.5Cu0.5 demonstrates a magnetostructural phase transition (MSPT) of the first order in the 254–...

The goal of the research is to look into the transformational potential of food biopolymers in the production of high-quality plant-based meals. The project aims to optimize formulations, improve techno-functionalities, and perform comparative comparisons with meat-based products by focusing on proteins, starches, and fibers obtained from plants. T...

In order to overcome the low-efficiency and low-accuracy of present manual demarcation method for the sub-bottom layers, an automatic demarcation and extraction method based on sediment quality factor and peak-trough on the echo energy loss level curve was proposed. Firstly, the original SEGY file from sub-bottom profile (SBP) was decoded and the a...

The processing of mangoes has been on the rise as represents an important step in the production of nutritious products. Furthermore, the strong demand for the fruit means that it can generate large revenue to small scale farmers. Due to its perishability, mango processing poses several obstacles in terms of industrialization as well as market expa...

Within Open Relation Extraction (ORE) tasks, the Zero-shot ORE method is to generalize undefined relations from predefined relations, while the Unsupervised ORE method is to extract undefined relations without the need for annotations. However, despite the possibility of overlap between predefined and undefined relations in the training data, a uni...

p>Uncorrelated Neighborhood Preserving Embedding (UNPE) </p

p>Uncorrelated Neighborhood Preserving Embedding (UNPE) </p

Objectives: When detecting changes in synthetic aperture radar (SAR) images, the quality of the difference map has an important impact on the detection results, and the speckle noise in the image interferes with the extraction of change information. In order to improve the detection accuracy of SAR image change detection and improve the quality of...

In this paper, a quadratic convolution neural network (QCNN) using both audio and vibration signals is utilized for bearing fault diagnosis. Specifically, to make use of multi-modal information for bearing fault diagnosis, the audio and vibration signals are first fused together using a 1 × 1 convolution. Then, a quadratic convolution neural networ...

Biomedical relation extraction is a crucial task for extracting valuable knowledge from unstructured scientific literature. This paper discusses our team's, lasigeBioTM, involvement in the BioCreative VIII Track 1: BioRED in both sub-tasks. Our primary focus was on the relation extraction (RE) task, taking advantage of the K-RET system in combinati...

Sequence determines the structure, and the structure in turn determines the function, are the fundamental principles of protein chemistry. In the genomics era, the paradigm of mining protein functionality and evolutionary insights through sequence analysis has led to remarkable achievements. However, protein sequences often mutate faster than their...

The separation procedure for Ra isotopes and ²¹⁰ Pb from water using the EMPORE™ radium RAD disks is very quick and convenient. However, higher levels of the chemically similar Ba in the water at least partly prohibit the uptake of Ra and ²¹⁰ Pb, hampering the correct determination of these radionuclides. This investigation shows that the decrease...

Efficiently extracting features from satellite images is crucial for classification and post-processing activities. Many feature representation models have been created for this purpose. However, most of them either increase computational complexity or decrease classification efficiency. The proposed model in this paper initially collects a set of...

The article shows all mechanical tecnologies used for the minerals extraction, in the mining sector

Strata control is one of the major challenges in underground coal min- ing and needs special attention during depillaring operations. Depillaring in under- ground mining is generally a complex operation, which became a major contributor to accidents as per past experiences. The study of strata behaviour during depillaring is very much important so...

We construct admissible polynomial meshes on piecewise polynomial or trigono-metric curves of the complex plane, by mapping univariate Chebyshev points. Such meshes can be used for polynomial least-squares, for the extraction of Fekete-like and Leja-like interpolation sets, and also for the evaluation of their Lebesgue constants.

Establishing a lightweight yet high-precision object detection algorithm is paramount for accurately assessing workers’ helmet-wearing status in intricate industrial settings. Helmet detection is inherently challenging due to factors like the diminutive target size, intricate backgrounds, and the need to strike a balance between model compactness a...

Conditions of pluviality and dryness are crucial to registers of extraction, abandonment, and care in J. M. Coetzee’s Life and Times of Michael K . The analysis reads for these conditions across the looped hinterlands from the port city of Cape Town into the uplands of the Karoo. Water, specifically rain or the lack of it, shapes K’s capacity to (e...

With the development of continuous speech recognition technology, users have put forward higher requirements in terms of speech recognition accuracy. Low-resource speech recognition, as a typical speech recognition technology under restricted conditions, has become a research hotspot nowadays because of its low recognition rate and great applicatio...

This chapter uses the concept of the hinterland to put scholarship on climate imperialism in conversation with contemporary climate change considerations, specifically focused on South African energy companies and their operations in Africa. Two areas are surveyed: first, the intertwined histories of climate and imperialism are discussed in relatio...

This procedure outlines the materials and processes for eluting nasal lining fluid collected using a Mucosal Diagnostics FX-i nasosorption device. This protocol has been successfully used to elute nasal lining fluid for both DNA extraction for 16s rRNA sequencing & metagenomics, and for proteomics using the SomaScan assay.

The arc welding operation results in harmful fumes being emitted where welders are exposed to dangerous metallic gases and fumes for 6 to 8 hours daily at INFAB welding company in Guyana. This paper presents a design of a fume extraction system, the design incorporates workspace dimensions, volume calculations, duct materials required, framework ma...

The problems of collecting and sorting glass waste at the place of their formation, extraction of waste from dumps are considered. The sorting of glass waste according to the principle of the former purpose of the product made from it is proposed. It is proposed to divide all glass waste collected or extracted from dumps into ten groups for subsequ...

Strata control is one of the major challenges in underground coal mining and needs special attention during depillaring operations. Depillaring in under ground mining is generally a complex operation, which became a major contributor to accidents as per past experiences. The study of strata behaviour during depillaring is very much important so tha...

The article discusses the main factors in the process of extracting a substance based on water-soluble biologically active polysaccharides from the root of the Capparis spinosa plant-the degree of grinding of the raw material , the effect of the extractant, the influence of factors such as the influence of temperature and time on the extraction pro...

In order to optimize the enzymatic-assisted ultrasonic extraction method of total flavonoids from Sedum aizoon L., the effects of solid-liquid ratio, ethanol concentration, extraction temperature, extraction time, and ultrasound power on the extraction rate were investigated by single factor experiment. The optimum technological conditions for enzy...

Research into extraction kinetics is one of the crucial factors in a technological process. Extraction is used predominantly when working with organic feedstock. The study of the kinetics of extraction of a substance is a complex process, which is influenced by a large number of factors. This paper presents an analysis of one of these factors, name...

Automatic term extraction from a biomedical text is a well-known problem in the area of natural language processing. It is carried out by employing four kinds of measures: linguistic and rule-based, dictionary-based, statistical, and machine learning. Automatic term extraction indicates whether or not two or more words come together in the text mor...

Extraction face in a Cu mine in East of Qayen , East of Iran

Zusammenfassung In einem von der NFDI4Biodiversity geförderten Kooperationsprojekt der Generaldirektion der Staatlichen Archive Bayerns (GDA) und des Leibniz-Instituts für ökologische Raumentwicklung (IÖR) wurden Möglichkeiten der Verbesserung der Zugänglichkeit und Interoperabiltiät historischer Geoinformationen erprobt. Ziel des Projektes war die...

Sensitivity to the strong coupling $$\alpha _S(M^2_Z)$$ α S ( M Z 2 ) is investigated using existing Deep Inelastic Scattering data from HERA in combination with projected future measurements from the Electron Ion Collider (EIC) in a next-to-next-to-leading order QCD analysis. A potentially world-leading level of precision is achievable when combin...

Video anomaly detection is a very challenging task in the field of computer vision. In this paper, we propose a multidimensional two-stage memory-guided network based on future frame prediction. Firstly, based on the understanding of the temporal correlation information between continuous video frames, we use an implicit computational approach to e...

The presence of ChatGPT, which is based on Artificial Intelligence (AI), has attracted public attention and become a polemic. This application is very helpful for users in finding information, translating languages, and generating text similar to human speech. OpenAI's decision to launch the ChatGPT Plus service is related to its monetization strat...

The article presents research on demulsifiers for oil dehydration in order to increase the conservation of water resources by introducing an additional source. The laboratory experimental works on selection of highly effective demulsifier were carried out. The application of water-saving technology which provided the necessary technological and eco...

Open-set face recognition refers to a scenario in which biometric systems have incomplete knowledge of all existing subjects. Therefore, they are expected to prevent face samples of unregistered subjects from being identified as previously enrolled identities. This watchlist context adds an arduous requirement that calls for the dismissal of irrele...

We report, to the best of our knowledge, the first optical parametric oscillator (OPO) pumped by a visible AlGaInP-based vertical-external-cavity surface-emitting laser (VECSEL). Tunable emission over 1155–1300 nm in the signal and 1474–1718 nm in the idler are observed by temperature adjustment of a 40 mm-long 5%-MgO:PPLN crystal intracavity-pumpe...

Based on the interference spectrogram in the element–frequency domain using the data measured by the horizontal linear array, the source range can be estimated through the striation-based beamforming (SBF) method and its variants. Estimation of the striation slope is the basis for these ranging methods. But in practical scenarios, the tonal interfe...