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280 Results Found

  • Article
  • Open Access
3 Citations
4,805 Views
19 Pages

Metamorphic Testing of Relation Extraction Models

  • Yuhe Sun,
  • Zuohua Ding,
  • Hongyun Huang,
  • Senhao Zou and
  • Mingyue Jiang

10 February 2023

Relation extraction (RE) is a fundamental NLP task that aims to identify relations between some entities regarding a given text. RE forms the basis for many advanced NLP tasks, such as question answering and text summarization, and thus its quality i...

(This article belongs to the Section Analysis of Algorithms and Complexity Theory)
  • Article
  • Open Access
8 Citations
3,317 Views
36 Pages

26 August 2024

Metamorphic testing is a valuable approach to verifying machine learning programs where traditional oracles are unavailable or difficult to apply. This paper proposes a technique to prioritize metamorphic relations (MRs) in metamorphic testing for ma...

(This article belongs to the Section Artificial Intelligence)
  • Article
  • Open Access
12 Citations
5,046 Views
15 Pages

10 December 2019

The test oracle problem exists widely in modern complex software testing, and metamorphic testing (MT) has become a promising testing technique to alleviate this problem. The inference of efficient metamorphic relations (MRs) is the core problem of m...

  • Article
  • Open Access
1 Citations
3,005 Views
22 Pages

Testing an intricate plexus of advanced software system architecture is quite challenging due to the absence of test oracle. Metamorphic testing is a popular technique to alleviate the test oracle problem. The effectiveness of metamorphic testing is...

  • Article
  • Open Access
4 Citations
3,152 Views
24 Pages

30 August 2022

Magnetic resonance imaging (MRI) is an information-rich research tool used in diagnostics using image processing applications (IPAs), and the results are utilized in machine learning. Therefore, testing of IPAs for credible results is vital. A defici...

(This article belongs to the Section Computing and Artificial Intelligence)
  • Article
  • Open Access
15 Citations
4,486 Views
15 Pages

28 March 2021

Question Answering (QA) enables the machine to understand and answer questions posed in natural language, which has emerged as a powerful tool in various domains. However, QA is a challenging task and there is an increasing concern about its quality....

(This article belongs to the Special Issue Mathematics in Software Reliability and Quality Assurance)
  • Article
  • Open Access
5 Citations
5,777 Views
18 Pages

11 November 2018

Ultrahigh-pressure (UHP) chromitites containing UHP minerals such as coesite and diamond have been reported from some ophiolites in Tibet and the Polar Urals. Their nature, i.e., origin, P-T path and abundance, however, are still controversial and le...

(This article belongs to the Special Issue Petrology, Geochemistry and Mineralogy of the Mantle as Tools to Read Messages from the Earth’s Interior)
  • Article
  • Open Access
2 Citations
2,359 Views
25 Pages

CMBMeTest: Generation of Test Suites Using Model-Based Testing Plus Constraint Programming and Metamorphic Testing

  • M. Carmen de Castro-Cabrera,
  • Antonio García-Dominguez and
  • Inmaculada Medina-Bulo

Various software testing techniques have been shown to be successful in producing high-quality test suites for software where the code is not accessible (black-box approach). Nevertheless, no method has been found to guide combining some of these in...

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)
  • Article
  • Open Access
340 Views
20 Pages

20 August 2026

Entity alignment (EA) algorithms have been developed to identify and use links between entities in knowledge graphs (KGs), which are essential for data integration and information sharing. Given their significance, it is important to thoroughly evalu...

(This article belongs to the Collection Software Engineering: Computer Science and System)
  • Article
  • Open Access
1,063 Views
19 Pages

14 January 2026

The peculiar high-pressure mineral assemblage omphacite, epidote, quartz, calcite, titanite, and opaque minerals, ±phengite, has been observed in the Riffelberg–Garten Unit (RGU), a heterogeneous metasedimentary rock assemblage of the Ze...

(This article belongs to the Special Issue Petrological, Geochemical and Geodynamic Study of Ophiolites and Modern Oceanic Lithosphere)
  • Article
  • Open Access
6 Citations
3,117 Views
17 Pages

26 August 2022

(1) Background: Geological surveying is undergoing a digital transformation process towards the adoption of intelligent methods in China. Cognitive intelligence methods, such as those based on knowledge graphs and machine reading, have made progress...

(This article belongs to the Special Issue Tectonic Evolution of Orogens: Metamorphic Petrology, Structural Geology, Geochronology and Geochemistry)
  • Article
  • Open Access
10 Citations
5,703 Views
27 Pages

12 April 2022

A natural language processing system can realize effective communication between human and computer with natural language. Because its evaluation method relies on a large amount of labeled data and human judgment, the question of how to systematicall...

(This article belongs to the Section E1: Mathematics and Computer Science)
  • Article
  • Open Access
75 Citations
7,341 Views
13 Pages

Research on the Composition and Distribution of Organic Sulfur in Coal

  • Lanjun Zhang,
  • Zenghua Li,
  • Yongliang Yang,
  • Yinbo Zhou and ,
  • Jinhu Li,
  • Leilei Si and
  • Biao Kong
  • + 2 authors+ 0 author

The structure and distribution of organic sulfur in coals of different rank and different sulfur content were studied by combining mild organic solvent extraction with XPS technology. The XPS results have shown that the distribution of organic sulfur...

(This article belongs to the Section Molecular Diversity)
  • Article
  • Open Access
18 Citations
4,817 Views
20 Pages

13 December 2019

The Trans-North China Orogen (TNCO) is well-known as an early Precambrian orogenic belt in the North China Craton (NCC). Three meaningful groups of metamorphic ages have been reported in the metamorphic complexes throughout the TNCO, including c. 1.8...

(This article belongs to the Section Mineral Geochemistry and Geochronology)
  • Article
  • Open Access
4 Citations
4,400 Views
16 Pages

Brains in Metamorphosis: Temporal Transcriptome Dynamics in Hatchery-Reared Flatfishes

  • Laura Guerrero-Peña,
  • Paula Suarez-Bregua,
  • Luis Méndez-Martínez,
  • Pablo García-Fernández and ,
  • Ricardo Tur,
  • Juan A. Rubiolo,
  • Juan J. Tena and
  • Josep Rotllant
  • + 3 authors+ 0 author

2 December 2021

Metamorphosis is a captivating process of change during which the morphology of the larva is completely reshaped to face the new challenges of adult life. In the case of fish, this process initiated in the brain has traditionally been considered to b...

(This article belongs to the Special Issue Transcriptome and Genome Analyses Applied to Aquaculture Research)
  • Comment
  • Open Access
2,374 Views
5 Pages

25 January 2022

Volodichev et al. (Volodichev et al., 2021) reported on the first finding of omphacite (23%–25% Jd) inclusions in 2.68 Ga metamorphic zircons from Gridino eclogites and presented it as evidence for Archean eclogite-facies metamorphism in the Be...

  • Article
  • Open Access
1 Citations
2,500 Views
20 Pages

6 December 2022

Metamorphic core complexes are developed in crustal activity belts at the continental margins or within continents, and their main tectonic feature is that the ductile middle crust is exhumed at the surface. The deformation properties are closely rel...

(This article belongs to the Special Issue Mineral Resources in North China Craton)
  • Feature Paper
  • Review
  • Open Access
49 Citations
67,821 Views
83 Pages

Ruby Deposits: A Review and Geological Classification

  • Gaston Giuliani,
  • Lee A. Groat,
  • Anthony E. Fallick,
  • Isabella Pignatelli and
  • Vincent Pardieu

30 June 2020

Corundum is not uncommon on Earth but the gem varieties of ruby and sapphire are relatively rare. Gem corundum deposits are classified as primary and secondary deposits. Primary deposits contain corundum either in the rocks where it crystallized or a...

(This article belongs to the Special Issue Mineralogy and Geochemistry of Ruby)
  • Feature Paper
  • Review
  • Open Access
  • Best Paper Award
115 Citations
58,039 Views
63 Pages

Emerald Deposits: A Review and Enhanced Classification

  • Gaston Giuliani,
  • Lee A. Groat,
  • Dan Marshall,
  • Anthony E. Fallick and
  • Yannick Branquet

13 February 2019

Although emerald deposits are relatively rare, they can be formed in several different, but specific geologic settings and the classification systems and models currently used to describe emerald precipitation and predict its occurrence are too restr...

(This article belongs to the Special Issue Mineralogy and Geochemistry of Gems)
  • Article
  • Open Access
10 Citations
9,545 Views
13 Pages

1 May 2018

Quartz of metamorphic rocks from the Kaoko belt (Namibia) representing metamorphic zones from greenshist to granulite facies were investigated by cathodoluminescence (CL) microscopy and spectroscopy to characterize their CL properties. The samples co...

(This article belongs to the Special Issue Mineralogy of Quartz and Silica Minerals)
  • Article
  • Open Access
677 Views
19 Pages

Sedimentary–Metamorphic Evolution of Mudstone-Derived Graphite-Bearing Gneiss in the Datong–Xinrong Graphite Belt, North China Craton

  • Yue Zhang,
  • Yuqi Liang,
  • Wei Han,
  • Zhiqiang Feng and ,
  • Chengcheng Meng,
  • Yang Bai and
  • Xuan Xiang
  • + 2 authors+ 0 author

25 August 2026

Regional metamorphic graphite deposits in the North China Craton (NCC) are important crystalline graphite resources, but the links among sedimentary protolith, metamorphic evolution, and graphite mineralization remain insufficiently constrained in ma...

(This article belongs to the Special Issue Selected Papers from the 7th National Youth Geological Congress)
  • Article
  • Open Access
4 Citations
2,463 Views
19 Pages

8 September 2023

The Qinling Complex is located in the core of the northern Qinling Orogen and plays a key role in understanding the tectonic evolution of the Qinling Orogen, but its metamorphic evolution remains controversial. The combined investigation of petrograp...

(This article belongs to the Special Issue Linking Metamorphism with Orogenesis)
  • Article
  • Open Access
9 Citations
3,918 Views
30 Pages

15 December 2021

Three samples of meta-acidic rocks with pre-Alpine metamorphic relicts from the Sesia-Lanzo Zone eclogitic continental crust were investigated using stepwise controlled elemental maps by means of the Quantitative X-ray Maps Analyzer (Q-XRMA). Samples...

(This article belongs to the Section Mineral Deposits)
  • Article
  • Open Access
8 Citations
6,510 Views
12 Pages

Near-Infrared Spectroscopy of Hydrothermal versus Low-Grade Metamorphic Chlorites

  • Oscar M. Kamps,
  • Frank J.A. Van Ruitenbeek,
  • Paul R.D. Mason and
  • Freek D. Van der Meer

19 June 2018

Although the composition of chlorite group minerals represents a known proxy for conditions in various geological environments, few comparative studies of chlorites from different geological environments have been carried out. In this study, we compa...

  • Article
  • Open Access
6 Citations
2,631 Views
20 Pages

Zircons from Eclogite-Associated Rocks of the Marun–Keu Complex, the Polar Urals: Trace Elements and U–Pb Dating

  • Laysan Salimgaraeva,
  • Aleksey Berezin,
  • Sergey Sergeev,
  • Nikolai Gubanov and ,
  • Ekaterina Stetskaya and
  • Sergey Skublov
  • + 1 author+ 0 author

The Marun–Keu complex plays a significant role in our understanding of the geological evolution of the Ural orogen; however, it remains poorly understood. This study aims to provide insights into the complex’s age, protolith composition,...

(This article belongs to the Section Geochemistry)
  • Article
  • Open Access
1,534 Views
22 Pages

14 May 2025

The Heilongjiang Complex provides a crucial geological record of the evolutionary history of the Mudanjiang Ocean, making it significant for understanding the accretion process between the Jiamusi Block and the Songliao Block. In this study, we analy...

(This article belongs to the Special Issue Geochronological Methods Applied to the Exploration of Tectonic and Geological Processes)
  • Article
  • Open Access
12 Citations
8,017 Views
22 Pages

The Cedrolina Chromitite, Goiás State, Brazil: A Metamorphic Puzzle

  • Yuri De Melo Portella,
  • Federica Zaccarini,
  • George L. Luvizotto,
  • Giorgio Garuti and ,
  • Ronald J. Bakker,
  • Nelson Angeli and
  • Oskar Thalhammer
  • + 2 authors+ 0 author

1 September 2016

The Cedrolina chromitite body (Goiás-Brazil) is concordantly emplaced within talc-chlorite schists that correspond to the poly-metamorphic product of ultramafic rocks inserted in the Pilar de Goiás Greenstone Belt (Central Brazil). The chromite ore d...

(This article belongs to the Special Issue Advanced Research on Accessory Minerals)
  • Feature Paper
  • Article
  • Open Access
5 Citations
3,059 Views
18 Pages

24 July 2023

Paleoproterozoic banded iron formation (BIF) iron ore of the Zhengjiapo region of the Changyi metallogenic belt, Eastern Block of North China Craton contains abundant coexisting antiperthite and mesoperthite textures. The antiperthite and mesoperthit...

(This article belongs to the Section Mineral Geochemistry and Geochronology)
  • Article
  • Open Access
13 Citations
9,984 Views
26 Pages

16 April 2015

In this study, chlorite is used to investigate the diagenetic-metamorphic evolution and accurate geological history of the different units belonging to the Karakaya complex, Turkey. Primary and secondary chlorite minerals in the very low-grade metamo...

  • Article
  • Open Access
9 Citations
6,020 Views
27 Pages

Copper Sulfide Remobilization and Mineralization during Paleoproterozoic Retrograde Metamorphism in the Tongkuangyu Copper Deposit, North China Craton

  • Xuan Liu,
  • Kuifeng Yang,
  • Brian Rusk,
  • Zhengjie Qiu and ,
  • Fangfang Hu and
  • Jacques Pironon
  • + 1 author+ 0 author

18 July 2019

The Tongkuangyu copper deposit, North China Craton, is hosted in a volcano-sedimentary sequence (ca. 2.2 Ga) that metamorphosed to the lower amphibolite facies at ca. 1.9 Ga. Petrographic observations revealed various metamorphic fabrics (mineral ali...

(This article belongs to the Section Mineral Deposits)
  • Article
  • Open Access
14 Citations
3,156 Views
26 Pages

24 October 2022

Along the Western Alps, the oceanic units showing blueschists to eclogite facies metamorphic imprint are classically regarded as fragments of the Ligurian-Piedmont Ocean. These units recorded a strongly deformation related to their subduction, accret...

(This article belongs to the Section Mineral Geochemistry and Geochronology)
  • Article
  • Open Access
1,447 Views
19 Pages

29 May 2025

We report information on the protolith, the Triassic retrograde metamorphism, and anatexis recorded in zircons extracted from granitic gneiss and biotite schist in the Sulu orogenic zone, central China. The schist is enclosed within the granitic gnei...

  • Article
  • Open Access
807 Views
24 Pages

9 March 2026

In recent years, an ion-adsorption type REE deposit has been discovered for the first time in the weathering crust of epimetamorphic rocks in Ningdu County, Jiangxi Province, which provides a new idea for the exploration of ion-adsorption-type REE de...

(This article belongs to the Special Issue Advances in Granite Geochronology and Geochemistry)
  • Article
  • Open Access
9 Citations
4,851 Views
22 Pages

16 June 2021

Fluid inclusions (FIs) and associated solids in host minerals garnet, tourmaline, spodumene, and quartz from six pegmatite fields of Permian origin at Koralpe (Eastern Alps) have been investigated. Although pegmatites suffered intense Eoalpine high-p...

(This article belongs to the Special Issue Fluid, Melt and Solid Inclusions as a Petrogenetic Indicators)
  • Review
  • Open Access
36 Citations
4,178 Views
31 Pages

23 October 2020

The application of zircon dating to the reconstruction of orogenic systems is invaluable since time constraints of the geological evolution of orogens are crucial for the proposal of geodynamic and paleogeographic models. Zircon is one of the most pr...

(This article belongs to the Special Issue U-Pb Dating and Chemistry of Zircon in Metamorphic, Magmatic and Sedimentary Rocks)
  • Article
  • Open Access
1 Citations
1,852 Views
14 Pages

20 August 2025

The Nanwenhe tungsten deposit is located in the southeastern Yunnan Laojunshan mineral district and is hosted in the Paleoproterozoic Mengsong Group strata. It can be divided into two periods and four stages: skarn (early and late) and the vein type...

(This article belongs to the Special Issue Recent Developments in Rare Metal Mineral Deposits)
  • Article
  • Open Access
12 Citations
4,429 Views
23 Pages

25 September 2021

The Sambagawa metamorphic rocks in central Shikoku, southwest Japan consist of an inverted metamorphic sequence from the upper chlorite to oligoclase-biotite zones at the lower structural level (LSL), which is overlain by a normal metamorphic sequenc...

(This article belongs to the Section Crystallography and Physical Chemistry of Minerals & Nanominerals)
  • Article
  • Open Access
13 Citations
6,007 Views
32 Pages

14 April 2021

Ophiolites of the Alpine belt derive from the closure of the Mesozoic Tethys Ocean that was interposed between the palaeo-Europe and palaeo-Adria continental plates. The Alpine orogeny has intensely reworked the oceanic rocks into metaophiolites with...

(This article belongs to the Section Mineral Deposits)
  • Article
  • Open Access
9 Citations
5,851 Views
28 Pages

Trace Element and U–Pb Core Age for Zircons from Western Meiganga Gold Placer, Cameroon: Their Genesis and Archean-Proterozoic Sources

  • Nguo Sylvestre Kanouo,
  • Gabriel Ngueutchoua,
  • Arnaud Patrice Kouske,
  • Rose Fouateu Yongue and
  • Akella Satya Venkatesh

4 May 2018

Trace element concentrations and U–Pb ages were obtained using Laser Ablation Split Stream Method from the core of 115 zircon grains from the western Meiganga gold placer deposit. The data was used to characterize zircon, to understand the hist...

  • Article
  • Open Access
16 Citations
4,668 Views
21 Pages

Zircons from a Pegmatite Cutting Eclogite (Gridino, Belomorian Mobile Belt): U-Pb-O and Trace Element Constraints on Eclogite Metamorphism and Fluid Activity

  • Sergey G. Skublov,
  • Aleksey V. Berezin,
  • Xian-Hua Li,
  • Qiu-Li Li and ,
  • Laysan I. Salimgaraeva,
  • Veniamin V. Travin and
  • Dmitriy I. Rezvukhin
  • + 2 authors+ 0 author

This report presents new data on U-Pb geochronology, oxygen isotopes, and trace element composition of zircon from a pegmatite vein crosscutting an eclogite boudin on Stolbikha Island, Gridino area, Belomorian mobile belt (BMB). The zircon grains occ...

(This article belongs to the Special Issue Distribution of REE and Trace Elements for Different Types of Zircons)
  • Editorial
  • Open Access
1,248 Views
4 Pages

17 January 2025

Low-temperature geochemical processes are ubiquitous in geological areas related to weathering, diagenesis, very low-grade metamorphism, and post-magmatic processes, and provide an explanation of the P–T–X history of the Earth’s cru...

(This article belongs to the Special Issue Advances in Low-Temperature Mineralogy and Geochemistry)
  • Article
  • Open Access
10 Citations
4,734 Views
24 Pages

31 May 2023

The Korean Peninsula mainly comprises the Paleoproterozoic Gwanmo, Nangnim, Gyeonggi, and Yeongnam massifs from north to south. The Paleoproterozoic basement is rarely exposed in the Paleozoic Taebaeksan basin, which is located in the northeastern pa...

(This article belongs to the Special Issue Petrogenesis, Geochronology, Mineralization and Geochemistry of Granite Rocks)
  • Article
  • Open Access
8 Citations
13,836 Views
16 Pages

From Water to Land: The Structural Construction and Molecular Switches in Lungs during Metamorphosis of Microhyla fissipes

  • Liming Chang,
  • Meihua Zhang,
  • Qiheng Chen,
  • Jiongyu Liu and ,
  • Wei Zhu and
  • Jianping Jiang
  • + 1 author+ 0 author

30 March 2022

Most anurans must undergo metamorphosis to adapt to terrestrial life. This process enhances the air-breathing ability of the lungs to cope with the change in oxygen medium from water to air. Revealing the structural construction and molecular switche...

(This article belongs to the Section Zoology)
  • Article
  • Open Access
13 Citations
3,803 Views
13 Pages

Effects of Desiccation on Metamorphic Climax in Bombina variegata: Changes in Levels and Patterns of Oxidative Stress Parameters

  • Tamara G. Petrović,
  • Ana Kijanović,
  • Nataša Kolarov Tomašević,
  • Jelena P. Gavrić and ,
  • Svetlana G. Despotović,
  • Branka R. Gavrilović,
  • Tijana B. Radovanović,
  • Tanja Vukov,
  • Caterina Faggio and
  • Marko D. Prokić
  • + 5 authors+ 0 author

29 March 2021

In this paper, we examined how the oxidative status (antioxidant system and oxidative damage) of Bombina variegata larvae changed during the metamorphic climax (Gosner stages: 42—beginning, 44—middle and 46—end) and compared the patterns and levels o...

(This article belongs to the Section Animal Physiology)
  • Article
  • Open Access
1 Citations
2,050 Views
26 Pages

Genesis of the Bailugou Vein-Type Zinc-Lead-Silver Deposit, Eastern Qinling Orogen, China: Constraints from Ore Geology and Fluid Inclusions

  • Yan Yang,
  • Nana Guo,
  • Hui Chen,
  • Donghao Wu and ,
  • Zhenshan Pang and
  • Yanjing Chen
  • + 1 author+ 0 author

4 November 2024

The Bailugou vein-type zinc-lead-silver deposit is located in the Eastern Qinling Orogen, China. There has been a long-standing debate about whether its formation is related to magmatism or metamorphism. To determine the origin of ore-forming materia...

(This article belongs to the Special Issue Rare Metal and Related Deposits: Geology, Geochemistry and Mineralization)
  • Article
  • Open Access
7 Citations
9,374 Views
26 Pages

6 May 2019

In the Wadi Matulla area, central Sinai, Egypt, an asymmetric baked zone having an average width of 103 m was formed on both sides of a sub-aerial rift-related Oligocene basaltic dyke cross-cutting organic matter-bearing chalky limestone of the Upper...

  • Article
  • Open Access
1 Citations
3,614 Views
37 Pages

21 August 2024

The Perron deposit, located in the northern part of the Archean Abitibi belt, bears some of the highest gold-grade mineralization for orogenic-vein-type deposits worldwide (High-Grade Zone: HGZ). More than 13 gold-bearing zones with different sulfide...

(This article belongs to the Section Mineral Deposits)
  • Article
  • Open Access
3 Citations
5,289 Views
15 Pages

4 June 2018

We reported the petrography and mineral chemistry of 184 equilibrated ordinary chondrites collected from Grove Mountains, Antarctica. The chemical-petrographic types and shock metamorphism degrees of these chondrites were assigned. They were classifi...

  • Article
  • Open Access
1,180 Views
28 Pages

The Blue Coloration of Natural Sapphires After Heating in Oxidizing and Reducing Environments

  • Chunenapa Klomranok,
  • Somruedee Sakkaravej,
  • Wiwat Wongkokua,
  • Chatree Saiyasombat and
  • Natthapong Monarumit

22 July 2026

The blue color of sapphire is associated with Fe and Ti impurities that replace Al3+ in the corundum structure. Typically, sapphire color depends on its geological origin, such as basaltic or metamorphic localities, and the blue hue can change after...

(This article belongs to the Section Mineralogical Crystallography and Biomineralization)
  • Article
  • Open Access
19 Citations
5,533 Views
15 Pages

Source and Enrichment of Toxic Elements in Coal Seams around Mafic Intrusions: Constraints from Pyrites in the Yuandian Coal Mine in Anhui, Eastern China

  • Yanfei An,
  • Lingling Liu,
  • Mina Wang,
  • Shuo Zheng and ,
  • Yuanjie Guo,
  • Shuai Zhang and
  • Chunkit Lai
  • + 2 authors+ 0 author

17 April 2018

Pyrite, a mineral that can cause potential environmental issues in coal mining, is commonly found in coal seams around intrusions. In this paper, pyrites from the Yuandian Coal Mine (Huaibei Coalfield, Anhui, Eastern China) were studied using SEM, Ra...

(This article belongs to the Special Issue Toxic Mineral Matter in Coal and Coal Combustion Products)

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