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GPS: graph contrastive learning via multi-scale augmented views from adversarial pooling

Science China(Information Sciences) 2025年第1期68卷 145-158页

作者： Wei JU Yiyang GU Zhengyang MAO Ziyue QIAO Yifang QIN Xiao LUO Hui xiong Ming ZHANG School of Computer Science National Key Laboratory for Multimedia Information ProcessingPeking University Artificial Intelligence Thrust The Hong Kong University of Science and Technology Department of Computer Science University of California

Self-supervised graph representation learning has recently shown considerable promise in a range of fields, including bioinformatics and social networks. A large number of graph contrastive learning approaches have shown promising performance for representation learning on graphs, which train models by maximizing agreement between original graphs and their augmented views(i.e., positive views). Unfortunately, these methods usually involve pre-defined augmentation strategies based on the knowledge of human experts. Moreover, these strategies may fail to generate challenging positive views to provide sufficient supervision signals. In this paper, we present a novel approach named graph pooling contrast(GPS) to address these *** by the fact that graph pooling can adaptively coarsen the graph with the removal of redundancy, we rethink graph pooling and leverage it to automatically generate multi-scale positive views with varying emphasis on providing challenging positives and preserving semantics, i.e., strongly-augmented view and weakly-augmented view. Then, we incorporate both views into a joint contrastive learning framework with similarity learning and consistency learning, where our pooling module is adversarially trained with respect to the encoder for adversarial robustness. Experiments on twelve datasets on both graph classification and transfer learning tasks verify the superiority of the proposed method over its counterparts.

关键词： graph representation learning graph neural networks graph contrastive learning graph augmentations graph pooling

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集装箱板钢薄板坯连铸用结晶器保护渣

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钢铁研究学报 2005年第2期17卷 16-18页

作者：唐萍文光华徐楚韶洪兵雄陈国江王进步李伟峰重庆大学材料科学与工程学院重庆400044 广州珠江钢铁集团公司技术部广东广州510730 河南西峡保护材料集团公司技术部河南西峡474500

针对集装箱板钢薄板坯连铸过程中拔热量偏低及不稳定问题,根据集装箱板钢种及相适应的结晶器保护渣特点,分析了结晶器拔热量与保护渣理化性能的关系,提出了相应的保护渣理化性能指标。实践表明:新开发的XCZ H保护渣的使用性能稳定,铸坯... 详细信息

针对集装箱板钢薄板坯连铸过程中拔热量偏低及不稳定问题,根据集装箱板钢种及相适应的结晶器保护渣特点,分析了结晶器拔热量与保护渣理化性能的关系,提出了相应的保护渣理化性能指标。实践表明:新开发的XCZ H保护渣的使用性能稳定,铸坯表面质量良好。

关键词：薄板坯连铸集装箱板钢结晶器保护渣

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Vertical gradients of neutral winds observed by ICON and estimated by the Horizontal Wind Model during the geomagnetic storm on August 26−28,2021

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Earth and Planetary Physics 2025年第1期9卷 69-80页

作者： JiaWei Wu Chao xiong YuYang Huang YunLiang Zhou Department of Space Physics School of Electronic InformationHubei Luojia LaboratoryWuhan UniversityWuhan 430072China

The Michelson Interferometer for Global High-resolution Thermospheric Imaging(MIGHTI)onboard the Ionospheric Connection Explorer(ICON)satellite offers the opportunity to investigate the altitude profile of thermospheric *** this study,we used the red-line measurements of MIGHTI to compare with the results estimated by Horizontal Wind Model 14(HWM14).The data selected included both the geomagnetic quiet period(December 2019 to August 2022)and the geomagnetic storm on August 26-28,*** the geomagnetic quiet period,the estimations of neutral winds from HWM14 showed relatively good agreement with the observations from *** to the ICON observations,near the equator,zonal winds reverse from westward to eastward at around 06:00 local time(LT)at higher altitudes,and the stronger westward winds appear at later LTs at lower *** around 16:00 LT,eastward winds at 300 km reverse to westward,and vertical gradients of zonal winds similar to those at sunrise hours can be *** the middle latitudes,zonal winds reverse about 2-4 h *** winds vary more significantly than zonal winds with seasonal and latitudinal *** to the ICON observations,in the northern low latitudes,vertical reversals of meridional winds are found at 08:00-13:00 LT from 300 to 160 km and at around 18:00 LT from 300 to 200 km during the June *** reversals of meridional winds are found at 04:00-07:00 LT from 300 to 160 km and at 22:00-02:00 LT from 270 to 200 km during the December *** the southern low latitudes,meridional wind reversals occur at 08:00-11:00 LT from 200 to 160 km and at 21:00-02:00 LT from 300 to 200 km during the June *** the December solstice,reversals of the meridional wind appear at 20:00-01:00 LT below 200 km and at 06:00-11:00 LT from 300 to 160 *** the northern middle latitudes,the northward winds are dominant at 08:00-14:00 LT at 230 km during the June *** winds persist until

关键词： horizontal neutral winds vertical gradients Ionospheric Connection Explorer satellite Horizontal Wind Model 14 geomagnetic storm

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Multifunctional Nacre‑Like Nanocomposite Papers for Electromagnetic Interference Shielding via Heterocyclic Aramid/MXene Template‑Assisted In‑Situ Polypyrrole Assembly

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Nano-Micro Letters 2025年第3期17卷 37-54页

作者： Jinhua xiong Xu Zhao Zonglin Liu He Chen Qian Yan Huanxin Lian Yunxiang Chen Qingyu Peng Xiaodong He National Key Laboratory of Science and Technology On Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080People’s Republic of China

Robust, ultra-flexible, and multifunctional MXene-basedelectromagnetic interference (EMI) shielding nanocomposite filmsexhibit enormous potential for applications in artificial intelligence,wireless telecommunication, and portable/wearable electronic *** this work, a nacre-inspired multifunctional heterocyclic aramid(HA)/MXene@polypyrrole (PPy) (HMP) nanocomposite paper withlarge-scale, high strength, super toughness, and excellent tolerance tocomplex conditions is fabricated through the strategy of HA/MXenehydrogel template-assisted in-situ assembly of PPy. Benefiting from the"brick-and-mortar" layered structure and the strong hydrogen-bondinginteractions among MXene, HA, and PPy, the paper exhibits remarkable mechanical performances, including high tensile strength (309.7 MPa),outstanding toughness (57.6 MJ m−3), exceptional foldability, and structural stability against ultrasonication. By using the template effect ofHA/MXene to guide the assembly of conductive polymers, the synthesized paper obtains excellent electronic conductivity. More importantly,the highly continuous conductive path enables the nanocomposite paper to achieve a splendid EMI shielding effectiveness (EMI SE) of 54.1 dBat an ultra-thin thickness (25.4 μm) and a high specific EMI SE of 17,204.7 dB cm2g−1. In addition, the papers also have excellent applicationsin electromagnetic protection, electro-/photothermal de-icing, thermal therapy, and fire safety. These findings broaden the ideas for developinghigh-performance and multifunctional MXene-based films with enormous application potential in EMI shielding and thermal management.

关键词： MXene Remarkable mechanical properties Heterocyclic aramid Electromagnetic interference shielding Polypyrrole Multifunctionality

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Unraveling the mechanism of action of Shangxia Liangji formula for treating insomnia:a metabolomics and network pharmacology approach

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Traditional Medicine Research 2025年第2期10卷 16-29页

作者： Xia-Jie Quan Hao Liang Yong-hong Tang Li Jiang xiong-Ying Ji Feng-Ying Zhang Ping Zhang Bo Ouyang Department of Information The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyang 421002China Department of Neurology The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyang 421002China Department of Gastroscopy The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyang 421002China Department of Traditional Chinese Medicine The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyang 421002China

Background:Insomnia is a prevalent clinical condition and Shangxia Liangji formula(SXLJF)is a well-established method of ***,the specific mechanism of action of SXLJF remains ***:The mouse model of insomnia was established by intraperitoneal injection of ***-two mice were randomly divided into a negative control group,model group,SXLJF group(18.72 g/kg/day),and positive control group(diazepam,2 mg/kg)and treated with the corresponding drugs for 7 consecutive *** open field test and pentobarbital-induced sleeping test were ***-MS-based untargeted metabolomics and network pharmacology were applied to explore the potential targets of SXLJF for treating ***,key targets were validated using ***:Behavioral tests demonstrated that SXLJF reduced the total distance,average velocity,central distance,and sleep latency,and prolonged sleep *** and network pharmacology revealed potential targets,signaling pathways,metabolic pathways,and metabolites associated with the anti-insomnia effects of ***,tyrosine hydroxylase(TH)and tyrosine metabolism emerged as crucial metabolic pathways and targets,***-qPCR results supported the role of TH in the mechanism of SXLJF in treating ***:In conclusion,TH and tyrosine metabolism may represent significant targets and pathways for SXLJF in treating insomnia.

关键词： Shangxia Liangji formula insomnia metabolomics network pharmacology tyrosine hydroxylase tyrosine metabolism

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CSP结晶器内卷渣的瞬态特征

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北京科技大学学报 2009年第6期31卷 764-769页

作者：王现辉王新华张炯明王万军柴毅忠洪兵雄北京科技大学冶金与生态工程学院北京100083 广州珠江钢铁有限公司广州510730

利用1∶1的水力学模型对双侧孔水口结构下的CSP结晶器内卷渣现象进行了模拟.结果表明:由于双侧孔水口下结晶器内液面的动态失稳现象,导致其液面卷渣呈周期性;液面失稳态时会发生连续剪切卷渣,液面卷渣有效涡主要出现在液面失稳态,拉速... 详细信息

利用1∶1的水力学模型对双侧孔水口结构下的CSP结晶器内卷渣现象进行了模拟.结果表明:由于双侧孔水口下结晶器内液面的动态失稳现象,导致其液面卷渣呈周期性;液面失稳态时会发生连续剪切卷渣,液面卷渣有效涡主要出现在液面失稳态,拉速对液面卷渣影响较大.分析了液渣滴在结晶器内运动的瞬态特征.CSP结晶器内液面卷渣的周期性导致铸坯内大型夹杂物纵向分布差异较大.

关键词：结晶器卷渣水模型流场液面波动

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新质生产力、数字技术创新与产品质量升级

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广西师范大学学报（哲学社会科学版） 2025年第1期61卷 95-114页

作者：施炳展熊治南开大学经济学院天津300071 南开大学经济与社会发展研究院天津300071

数字技术创新是新质生产力的组成部分,出口产品质量升级是高质量开放发展的基本要求。聚焦数字技术创新对出口产品质量的影响,从而探讨新质生产力促进高质量发展的渠道、机制和障碍,理论分析表明:数字技术创新降低资源投入、提升资源效... 详细信息

数字技术创新是新质生产力的组成部分,出口产品质量升级是高质量开放发展的基本要求。聚焦数字技术创新对出口产品质量的影响,从而探讨新质生产力促进高质量发展的渠道、机制和障碍,理论分析表明:数字技术创新降低资源投入、提升资源效率影响在位企业产品质量、临界企业产品质量和整体平均产品质量,对平均产品质量的影响具有不确定性。实证分析发现,数字技术创新自身难以提升平均产品质量,但与传统技术创新交叉项却显著稳健为正,这体现了数实融合、新旧融合的必要性;这一作用对中高技术产品并不显著,意味着中高技术产品质量升级可能更依靠技术创新质量;上述结论在考虑测量误差、样本选择、内生性等因素后依然显著。促进数字技术创新与传统技术创新融合是提升产品质量、促进高质量发展的关键,新质生产力无法孤立于旧生产力而发挥作用。

关键词：新质生产力数字技术创新新旧融合产品质量高质量发展

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Differential distribution of PINK1 and Parkin in the primate brain implies distinct roles

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Neural Regeneration Research 2025年第4期20卷 1124-1134页

作者： Yanting Liu Wei Huang Jiayi Wen Xin xiong Ting Xu Qi Wang Xiusheng Chen Xianxian Zhao Shihua Li Xiaojiang Li Weili Yang Guangdong Key Laboratory of Non-human Primate Research Key Laboratory of CNS Regeneration(Ministry of Education)Guangdong-Hongkong-Macao CNS Regeneration Institute of Jinan UniversityJinan UniversityGuangzhouGuangdong ProvinceChina

The vast majority of in vitro studies have demonstrated that PINK1 phosphorylates Parkin to work together in mitophagy to protect against neuronal ***,it remains largely unclear how PINK1 and Parkin are expressed in mammalian *** has been difficult to address because of the intrinsically low levels of PINK1 and undetectable levels of phosphorylated Parkin in small *** this issue is critical for elucidating the in vivo roles of PINK1 and ***,we showed that the PINK1 kinase is selectively expressed as a truncated form(PINK1–55)in the primate *** the present study,we used multiple antibodies,including our recently developed monoclonal anti-PINK1,to validate the selective expression of PINK1 in the primate *** found that PINK1 was stably expressed in the monkey brain at postnatal and adulthood stages,which is consistent with the findings that depleting PINK1 can cause neuronal loss in developing and adult monkey ***1 was enriched in the membrane-bound fractionations,whereas Parkin was soluble with a distinguishable *** double staining experiments showed that PINK1 and Parkin did not colocalize under physiological conditions in cultured monkey astrocytes,though they did colocalize on mitochondria when the cells were exposed to mitochondrial *** findings suggest that PINK1 and Parkin may have distinct roles beyond their well-known function in mitophagy during mitochondrial damage.

关键词： neurodegeneration Parkin Parkinson’s disease PINK1 subcellular distribution

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Deficiencies of streamline tracing techniques for designing hypersonic inlets and potential solutions

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Science China(Technological Sciences) 2020年第3期63卷 488-495页

作者： xiong bing FAN XiaoQiang WANG Yi College of Aerospace Science Engineering National University of Defense Technology

This work focuses on streamline tracing techniques for designing hypersonic inlets, and two deficiencies were ***, constriction ratios of stream-traced inlets are unpredictable and uncontrollable, which may affect the integration with airframes and combustors. Secondly, stream-traced inlets cannot exactly inherit properties from a basic flowfield through which they are traced. Then flow mechanisms underneath these phenomena were clarified. It was made clearly that properties of flow tubes captured by an inlet are what essentially determines constriction ratios as well as performances of inlets. Based on flow mechanisms, the method of calculating along streamlines(MCS) was proposed, which makes it possible to evaluate inlet performances directly. At last, optimization design methodologies were introduced to make inlet constriction ratios controllable,and simultaneously improve inlet performances as much as possible.

关键词： hypersonic inlet streamline tracing optimization methodology

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Solar flare forecasting based on a Fusion Model

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Earth and Planetary Physics 2025年第1期9卷 171-181页

作者： YiYang Li ShiYong Huang SiBo Xu ZhiGang Yuan Kui Jiang QiYang xiong RenTong Lin School of Earth and Space Science Technology Hubei Luojia LaboratoryWuhan UniversityWuhan 430072China

Solar flare prediction is an important subject in the field of space *** learning technology has greatly promoted the development of this *** this study,we propose a novel solar flare forecasting model integrating Deep Residual Network(ResNet)and Support Vector Machine(SVM)for both≥C-class(C,M,and X classes)and≥M-class(M and X classes)*** collected samples of magnetograms from May 1,2010 to September 13,2018 from Space-weather Helioseismic and Magnetic Imager(HMI)Active Region Patches and then used a cross-validation method to obtain seven independent data *** then utilized five metrics to evaluate our fusion model,based on intermediate-output extracted by ResNet and SVM using the Gaussian kernel *** results show that the primary metric true skill statistics(TSS)achieves a value of 0.708±0.027 for≥C-class prediction,and of 0.758±0.042 for≥M-class prediction;these values indicate that our approach performs significantly better than those of previous *** metrics of our fusion model’s performance on the seven datasets indicate that the model is quite stable and robust,suggesting that fusion models that integrate an excellent baseline network with SVM can achieve improved performance in solar flare ***,we also discuss the performance impact of architectural innovation in our fusion model.

关键词： solar flare pace weather deep learning Fusion Model

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