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The characterization and analysis of rock types based on acoustic emission (AE) signals have long been focal points in earth science research. However, traditional analysis methods struggle to handle the influx of big data. While signal processing methods combined with deep learning have found widespread use in various process analyses and state identification, effective feature extraction using progressive fusion technology still faces challenges in the field of intelligent rock type identification. To address this issue, our study proposes a novel framework for rock type identification based on AE and introduces a new signal identification model called 3CTNet. This model integrates convolutional neural networks (CNNs) and Transformer encoder, intelligently identifying AE of different rock fractures by establishing dependencies between adjacent positions within the data and gradually extracting advanced features. Furthermore, we experimentally compare five oversampling methods, ultimately selecting the adaptive synthetic sampling method (ADASYN) to balance the dataset and enhance the model's robustness and generalization ability. Comparison of the internal structure of our model with a series of time series processing models demonstrates the effectiveness of the proposed model structure. Experimental results showcase the high identification accuracy of the intelligent rock type identification model based on 3CTNet, with an overall identification accuracy reaching 98.780%. Our proposed method lays a solid foundation for the efficient and accurate identification of formation rock types in geological exploration and oil and gas development endeavors. [ABSTRACT FROM AUTHOR]

After the sample of nickel-platinum alloy was digested in the mixture of hydrochloric acid and nitric acid, seventeen impurity elements were determined by inductively coupled plasma mass spectrometry (ICP-MS). The analysis of Mg, Al, Ti, Cr, Mn, Co, Zn, Cu, Zr, Pd, Ag, Sn, Sm and Pb was performed by using the normal mode whereas the measurement of Si and Fe were carried out by using NH3 as the reaction gas at a flow rate 0.2 and 25 mL/min, respectively. Finally, V content was analyzed by choosing He as the reaction gas at a flow rate of 5 mL/min. The effect of the matrix on the determination was investigated. Internal standard method was used to improve the accuracy. Sc was selected as an internal standard for correcting Mg, Al, Ti, Cr, V, Mn, Fe, Co, Zn, Si, and Y for Cu, Zr, Pd, Ag, Sn, and Re for Sm and Pb. The linear correlation coefficient (r) was larger than 0.9997. The detection limits were 0.0025 -0.78 ng/mL, and the recoveries of standard addition were 89.0%~116.5%. The relative standard deviation (RSD) was found to be 0.86%~13.07% for all 17 elements. The method developed in this work can be applied to the analysis of Ni-Pt alloy target materials. [ABSTRACT FROM AUTHOR]

Accurate determination of platinum content in nickel-platinum alloy. It is an important index in material balance inspection and trade. In the past, diluted Inductively coupled plasma atomic emission spectroscopy were used, but the dilution process of this method is easy to introduce error. Yttrium internal standard measurement control. The sample was dissolved by hydrochloric acid and nitric acid, in 15% hydrochloric acid medium. The method of Accurate determination of platinum content in Ni-Pt alloy target by ICP-AES is established. the influencing factors, including the line selection, effect of matrix nickel, instrument determination conditions, were been experimented. The detection limits (µg/mL) of the method were 0.029 for (Pt 204.937), 0.046 for (Pt 299.797), 0.035 for (Pt 265.945). The determination levels of the platinum in the range from 1.00% to 15.00%. The standard recoveries are from 99.1% to 101.6%, RSD<1%. The method is accurate, fast and simple. The results were in good agreement with those obtained by Titrimetric determination. [ABSTRACT FROM AUTHOR]

Dasypyrum villosum (L.) Candargy, a wild relative of bread wheat (Triticum aestivum L.), is the source of many agronomically important genes for wheat improvement. Production of compensating Robertsonian translocations (cRobTs), consisting of D. villosum chromosome arms translocated to homoeologous wheat chromosome arms, is one of the initial steps in exploiting this variation. The cRobTs for D. villosum chromosomes 1V, 4V, and 6V have been reported previously. Here we report attempted cRobTs for wheat - D. villosum chromosome combinations 2D/2V, 3D/3V, 5D/5V, and 7D/7V. The cRobTs for all D. villosum chromosomes were recovered except for the 2VS and 5VL arms. As was the case with the 6D/6V combination, no cRobTs involving 2D/2V chromosomes were recovered; instead, cRobT T2BS-2VL involving a non- targeted chromosome was recovered. All cRobTs are fertile, although the level of spike fertility and hundred kernel weight (HKW) varied among the lines. The set of cRobTs involving 12 of the 14 D. villosum chromosomes will be useful in wheat improvement programs. In fact, among the already reported cRobTs, T6AL-6VS carrying the Pm21 gene is deployed in agriculture and many useful genes have been reported on other cRobTs including resistance to stem rust race UG99 on T6AS-6VL. Key words: Triticum aestivum, Dasypyrum villosum, compensating Robertsonian translocation, EST-STS marker, GISH. Le Dasypyrum villosum (L.) Candargy, une espece sauvage apparentee au ble tendre (Triticum aestivum L.), est la source de nombreux genes d'interet agronomique en selection. La production de translocations robertsoniennes compensatoires (cRobT), comprenant des bras chromosomiques du D. villosum transloques sur les bras chromosomiques homeologues correspondants chez le ble, constitue une des etapes initiales en vue de l'exploitation de cette variation. Les translocations cRobT pour les chromosomes 1V, 4V et 6V du D. villosum ont ete rapportees precedemment. Dans ce travail, les auteurs ont tente d'obtenir des translocations cRobT pour les compositions chromosomiques ble - D. villosum suivantes : 2D/2V, 3D/3V, 5D/5V et 7D/7V. Les translocations cRobT pour tous les chromosomes du D. villosum ont ete obtenues a l'exception des bras 2VS et 5VL. Comme cela a ete le cas pour la combinaison 6D/6V, aucune translocation cRobT impliquant les chromosomes 2D/2V n'a ete obtenue ; au lieu, les auteurs ont obtenu une translocation cRobT T2BS-2VL impliquant un chromosome non-cible. Toutes les translocations cRobT etaient fertiles bien que le degre de fertilite et le poids de cent grains (HKW) ait ete variable entre les lignees. Ce jeu de translocations cRobT impliquant 12 des 14 chromosomes du D. villosum sera utile en vue de l'amelioration genetique du ble. En fait, parmi les translocation cRobT deja rapportees, la translocation T6AL-6VS portant le gene Pm21 est deja employee en agriculture et plusieurs genes utiles ont ete rapportees sur d'autres translocations cRobT dont la resistance a la race UG99 de la rouille du ble sur la translocation T6AS-6VL. Mots-cles : Triticum aestivum, Dasypyrum villosum, translocations robertsoniennes compensatoires, EST-SSR, GISH. [Traduit par la Redaction], Introduction Dasypyrum villosum (L.) Candargy (syn. Haynaldia villosa L. Schur.) is a diploid (2n = 2x = 14, VV) outcrossing annual species native to the Mediterranean region and has high [...]

Member 1 of the Cretaceous Qingshankou Formation (K2qn1 Member) in the Southern Songliao Basin, composed of mainly semi-deep and deep lacustrine shale layers, is rich in shale oil. Previous studies on shale reservoir characteristics mainly focused on marine shale strata, but few studies have considered lacustrine shale strata, so the pore-throat features and differences between the lacustrine shale reservoir and marine shale reservoir need to be studied. Taking the Class-I and II sweet spot sections and Class-III non-sweet spot section of Da'an shale oil demonstration area as examples, SEM (scanning electron microscopy) was used to qualitatively and semi-quantitatively describe the morphology and occurrence characteristics of the shale. Full-scale pore size distributions of lacustrine shale samples were quantitatively measured by N2GA (nitrogen absorption) combined with dominant pore size segments tested by experiments. Finally, the lacustrine shale reservoir was compared with classical marine shale reservoirs, and factors influencing semi-deep lacustrine and deep lacustrine shale oil in a large depression basin were analyzed by XRD (X-ray diffraction). The results show that Class-I and II sweet spots are rich in organic matter, quartz, and carbonate minerals, have mainly type H2 nitrogen adsorption hysteresis loops, and contain mainly inorganic pores, such as intergranular and intragranular pores in nano-scale, forming nano-scale reservoirs. Lacustrine shale is obviously different from marine shale in terms of pore structure, and the development characteristics of the lacustrine shale pore structure are more influenced by mineral components. Factors affecting the development of shale oil reservoirs in K2qn1 member include mineral components, TOC (total organic carbon), and diagenetic processes. Quartz and carbonate minerals are good for enhancing reservoir quality, while clay minerals are destructive to the development of reservoirs. TOC is the material foundation and main factor for forming organic pores, but the higher the TOC, the smaller the diameter of the organic pores will be. Compaction, cementation, and dissolution are the main diagenetic processes controlling the development of reservoir space. [ABSTRACT FROM AUTHOR]