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Crustal magma oxidation state and endowments in porphyry copper deposits

Science China Earth Sciences 2025年第1期68卷 226-236页

作者： Yumin AI Massimo CHIARADIA Chao wu Huayong CHEN Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Earth Sciences University of Geneva Guangdong Provincial Key Laboratory of Mineral Physics and Materials

Porphyry copper deposits（PCDs） supply the majority of the world's copper（Cu） as well as significant amounts of molybdenum（Mo） and gold（Au）. The formation of these deposits is controlled by a variety of geological factors, among which the magmatic oxidation is one of the focuses of current research. This study investigates the redox characteristics of arc magmas by analyzing the ratio of vanadium（V） to scandium（Sc） and its correlation with the oxygen fugacity （fO2） of magmas from arcs of various crustal thicknesses globally. We compiled an extensive dataset of published V/Sc values and studied the partition coefficients of Vand Sc between minerals and silicate melts across various magmatic environments. The results demonstrate that fractional crystallization of magnetite markedly reduces V/Sc values of the residual melt. Furthermore, magnesium number（Mg#） at the onset of magnetite fractionation is strongly positively correlated with fO2of the equilibrium magma. Based on this,the oxidation of arc magmas from different crustal thicknesses can be evaluated. The result suggests that magmas generated in crusts thicker than 20 km tend to be more oxidized with increasing crust thickness. This trend is attributed to enhanced intracrustal differentiation processes involving garnet and amphibole, particularly in mature island and continental arcs. In contrast,magmas in thinner arc crusts（<20 km）, which are significantly influenced by subducted slab materials, display higher oxidation states than most of their thicker crust counterparts. These findings suggest that both subduction dynamics and crustal thickness play a vital role in determining the oxidation state of arc magmas and, consequently, their capacity to generate PCDs. Highly oxidized, primitive arc magmas are less favorable for PCD formation due to that they tend to experience magnetite fractionation and thus sulfide saturation in the early stage of magma evolution, a process leading to copper depletion. On the contra

关键词： Magma evolution V/Sc systematics Magnetite Oxygen fugacity Porphyry copper deposits

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相位恢复波前重构技术的发展与应用(特邀)

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激光与光电子学进展 2024年第2期61卷 1-17页

作者：魏金文李儒佳吴佳琛张启航高云晖曹良才清华大学精密仪器系北京100084

光波复振幅中相位信息的恢复是科学与工程领域的重要研究热点之一。相位携带了光传播中的重要信息,对成像与智能感知技术的发展有着重要的意义。相位恢复波前重构技术通过优化算法和设计特定成像装置,从光电探测器采集的强度信息中恢复... 详细信息

光波复振幅中相位信息的恢复是科学与工程领域的重要研究热点之一。相位携带了光传播中的重要信息,对成像与智能感知技术的发展有着重要的意义。相位恢复波前重构技术通过优化算法和设计特定成像装置,从光电探测器采集的强度信息中恢复出难以被直接感知的相位信息,是探测微观和宏观世界的重要技术手段之一,已广泛应用于生物显微、工业检测和天文观测等领域。概述基于干涉和非干涉的波前重构技术及其应用,梳理相位恢复波前重构算法的基本原理和发展历程,对常见相位恢复技术手段如交替投影相位恢复算法、基于调制约束和基于深度学习的相位恢复波前重构技术等进行初步的探讨。针对相位恢复波前重构技术的未来发展提出若干可能的研究方向,包括相位恢复算法的进一步优化、新型系统和器件的开发等。

关键词：相位恢复波前重构计算成像深度学习

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新时代大学生宣讲团宣讲方法的实践探索——基于“苏师宣讲团”案例调查与分析

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科教文汇 2019年第30期 9-10,13页

作者：吴家臣王淇韩洪政江苏师范大学马克思主义学院

党的十九大以来,习近平新时代中国特色社会主义思想的党的指导思想地位得到确立,学习贯彻习近平新时代中国特色社会主义思想已经成为一项极为重要而紧迫的政治任务。大学生宣讲团作为宣传和普及党和国家重大方针政策的重要途径,切实担... 详细信息

党的十九大以来,习近平新时代中国特色社会主义思想的党的指导思想地位得到确立,学习贯彻习近平新时代中国特色社会主义思想已经成为一项极为重要而紧迫的政治任务。大学生宣讲团作为宣传和普及党和国家重大方针政策的重要途径,切实担负起了学习、研究和宣传的重要任务。在实际的宣讲过程中,面对宣讲对象的多层次化以及宣传媒介的多样化、信息化,往常单一、片面的宣讲方法已不能满足新时代理论宣讲的需要,宣讲团亟须探索出一种综合程度高、实践效果好的宣讲方法。本文通过对"江苏师范大学习近平新时代中国特色社会主义思想大学生志愿者宣讲团"(简称"苏师宣讲团")的宣讲实践进行调查分析,对新时代背景下大学生宣讲团宣讲方法的创新提出了有关建议。

关键词：大学生宣讲团宣讲方法创新

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A Verifiable Trust-Based CP-ABE Access Control Scheme for Cloud-Assisted Renewable Energy Systems

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Computers, Materials & Continua 2025年第1期82卷 1211-1232页

作者： Jiyu Zhang Kehe wu Ruomeng Yan Zheng Tian Yizhen Sun Yuxi wu Yaogong Guo Department of Control and Computer Engineering North China Electric Power UniversityBeijing102206China State Grid Information&Communication Company of Hunan Electric Power Corporation Changsha410118China State Grid Hunan Electric Power Corporation Chenzhou Power Supply Branch Chenzhou423000China

Renewable Energy Systems(RES)provide a sustainable solution to climate warming and environmental pollution by enhancing stability and reliability through status acquisition and analysis on cloud platforms and intelligent processing on edge servers(ES).However,securely distributing encrypted data stored in the cloud to terminals that meet decryption requirements has become a prominent research ***,managing attributes,including addition,deletion,and modification,is a crucial issue in the access control scheme for *** address these security concerns,a trust-based ciphertext-policy attribute-based encryption(CP-ABE)device access control scheme is proposed for RES(TB-CP-ABE).This scheme effectivelymanages the distribution and control of encrypted data on the cloud through robust attribute key *** introducing trust management mechanisms and outsourced decryption technology,the ES system can effectively assess and manage the trust worthiness of terminal devices,ensuring that only trusted devices can participate in data exchange and access sensitive ***,the ES system dynamically evaluates trust scores to set decryption trust thresholds,thereby regulating device data access permissions and enhancing the system’s *** validate the security of the proposed TB-CP-ABE against chosen plaintext attacks,a comprehensive formal security analysis is conducted using the widely accepted random oraclemodel under the decisional q-Bilinear Diffie-Hellman Exponent(q-BDHE)***,comparative analysis with other schemes demonstrates that the TB-CP-ABE scheme cuts energy/communication costs by 43%,and scaleswell with rising terminals,maintaining average latency below 50ms,ensuring real-time service *** proposed scheme not only provides newinsights for the secure management of RES but also lays a foundation for future secure energy solutions.

关键词： Access control renewable energy systems(RES) ciphertext-policy attribute-based encryption(CP-ABE) security

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炭黑氧化度对顺丁橡胶/天然橡胶并用胶性能的影响

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轮胎工业 2024年第7期44卷 418-421页

作者：王海燕吴佳辰王迅青岛黑猫炭黑科技有限责任公司山东青岛266042

研究炭黑氧化度对顺丁橡胶(BR)/天然橡胶(NR)并用胶性能的影响。经高温脱挥或氧化处理后炭黑填充的BR/NR并用胶的门尼粘度增大,加工性能变差;与未处理的炭黑填充BR/NR并用胶相比,高温脱挥处理炭黑填充BR/NR并用胶的300%定伸应力、拉伸... 详细信息

研究炭黑氧化度对顺丁橡胶(BR)/天然橡胶(NR)并用胶性能的影响。经高温脱挥或氧化处理后炭黑填充的BR/NR并用胶的门尼粘度增大,加工性能变差;与未处理的炭黑填充BR/NR并用胶相比,高温脱挥处理炭黑填充BR/NR并用胶的300%定伸应力、拉伸强度和压缩疲劳温升提高,耐老化性能降低;随着炭黑氧化度的增大,BR/NR并用胶的300%定伸应力、拉伸强度、撕裂强度和压缩疲劳温升降低;随着炭黑挥发分含量和氧化度的减小,0和60℃时BR/NR并用胶的损耗因子增大。

关键词：顺丁橡胶天然橡胶炭黑氧含量 Payne效应

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Hourglass-GCN for 3D Human Pose Estimation Using Skeleton Structure and View Correlation

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Computers, Materials & Continua 2025年第1期82卷 173-191页

作者： Ange Chen Chengdong wu Chuanjiang Leng Faculty of Robot Science and Engineering Northeastern UniversityShenyang110169China

Previous multi-view 3D human pose estimation methods neither correlate different human joints in each view nor model learnable correlations between the same joints in different views explicitly,meaning that skeleton structure information is not utilized and multi-view pose information is not completely ***,existing graph convolutional operations do not consider the specificity of different joints and different views of pose information when processing skeleton graphs,making the correlation weights between nodes in the graph and their neighborhood nodes *** Graph Convolutional Networks(GCNs)cannot extract global and deeplevel skeleton structure information and view correlations *** solve these problems,pre-estimated multiview 2D poses are designed as a multi-view skeleton graph to fuse skeleton priors and view correlations explicitly to process occlusion problem,with the skeleton-edge and symmetry-edge representing the structure correlations between adjacent joints in each viewof skeleton graph and the view-edge representing the view correlations between the same joints in different *** make graph convolution operation mine elaborate and sufficient skeleton structure information and view correlations,different correlation weights are assigned to different categories of neighborhood nodes and further assigned to each node in the *** on the graph convolution operation proposed above,a Residual Graph Convolution(RGC)module is designed as the basic module to be combined with the simplified Hourglass architecture to construct the Hourglass-GCN as our 3D pose estimation ***-GCNwith a symmetrical and concise architecture processes three scales ofmulti-viewskeleton graphs to extract local-to-global scale and shallow-to-deep level skeleton features *** results on common large 3D pose dataset Human3.6M and MPI-INF-3DHP show that Hourglass-GCN outperforms some excellent methods in 3D pose estimati

关键词： 3D human pose estimation multi-view skeleton graph elaborate graph convolution operation Hourglass-GCN

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Brain-derived neurotrophic factor plays with TRiC:focus on synaptic dysfunction in Huntington’s disease

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Neural Regeneration Research 2025年第10期20卷 2919-2920页

作者： Yingli Gu Kijung Sung Chengbiao wu Department of Neurosciences University of California San DiegoLa JollaCAUSA

Brain-derived neurotrophic factor(BDNF)exerts pleiotropic effects on brain processes including psychiatric disorders,aging,neurodegeneration,and metabolic homeostasis.A simple PubMed search using the key word“BDNF,”to date,yields over 33,000 *** fundamental biology to potential therapeutic applications,BDNF has clearly garnered extensive and significant attention in the field of neurobiology research.

关键词： Huntington homeostasis therapeutic

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A quantum-search-based multi-classifier for image recognition

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 21-31页

作者： Lu Liu Xingyu wu Lufan Zhang Chuan Wang School of Artificial Intelligence Beijing Normal University Applied Optics Beijing Area Major Laboratory Beijing Normal University

The multi-class classification of images is a pivotal challenge within the realm of image processing. As the volume of visual data continues to expand, there is a burgeoning interest in harnessing the unique capabilities of quantum computation to augment the efficiency of classification tasks. However, many existing methods for training quantum image multi-classifiers parallel classical machine learning techniques, where the requisite circuit measurements increase linearly with the volume of training data. This work introduces a novel approach for training a quantum image multi-classifier based on the quantum search algorithm. We have meticulously conducted rigorous experiments on a handwritten digit dataset, a classic benchmark in the field. The results have been meticulously compared with previous works, and the comparative analysis not only validates the efficiency of our proposed approach, requiring only O(N/b) measurements during training, but also highlights a significant quadratic speedup of the algorithm.

关键词： quantum computation image recognition quantum search algorithm

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Emerging trends in the selective production of value-added aromatics

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Science China Chemistry 2025年第1期68卷 15-20页

作者： Yuchao wu Houliang Dai Weisheng Yang Yaxing Li Lichen Liu Petrochemical Research Institute Company Limited China National Petroleum Corporation Engineering Research Center of Advanced Rare Earth Materials Department of Chemistry Tsinghua University

1 Introduction Aromatics (mainly benzene, toluene, and xylenes, BTX) are essential intermediates in the chemical industry. They are employed in the synthesis of a broad spectrum of chemicals and materials, e.g., various polymers, plastics, resins, solvents, dyes, pharmaceuticals [1]. The manufacturing pathway of BTX mainly includes petroleum reforming of naphtha, coal-to-aromatics, methanol-to-aromatics [2].

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独生子女家庭养老方式选择的影响因素及对策——基于杭州市五大主城区的实证调研

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浙江树人大学学报 2022年第4期22卷 45-51页

作者：吴佳晨童素娟张嘉玉浙江科技学院经济与管理学院浙江杭州310023 浙江大学经济学院浙江杭州310058 浙江省人力资源和社会保障科学研究院浙江杭州310013

我国第一批独生子女父母已经步入养老阶段,需要在传统养老和新型养老方式之间进行选择。为了更好地实现日益增长的美好生活需要,独生子女家庭须重新调整养老观念,选择更合适的养老方式。文章结合马斯洛需求理论,从生理安全需求、情感需... 详细信息

我国第一批独生子女父母已经步入养老阶段,需要在传统养老和新型养老方式之间进行选择。为了更好地实现日益增长的美好生活需要,独生子女家庭须重新调整养老观念,选择更合适的养老方式。文章结合马斯洛需求理论,从生理安全需求、情感需求、尊重及自我实现需求三个角度出发,梳理个人物质条件、生理条件和心理需求等影响因素,并通过有序回归分析进行筛选。根据数据分析结果,文章提出若干对策建议,以供参考。

关键词：独生子女家庭养老方式人口老龄化

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