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Mechanism of Brittle Cracking for High-Purity Cr18Mo2 Ferritic Stainless Steel

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Journal of Iron and Steel Research International 1997年第2期4卷 35-39页

作者： Liu Bin lu shiying Wang Xinzeng Central Iron and Steel Research Institute MMI

A study has been carried out on the effect of continuous cooling with different rate from 1 200 ℃ on the brittleness of vacuum melted,extra-low interstitial Cr18Mo2 ferritic stainless *** ductile-brittle transition temperature was found to be the lowest after water cooling and the highest after furnace *** increase of brittleness with cooling rate decrease is attributed to the formation of more *** the increase of titanium content the ductile- brittle transition temperature increases significantly.A low transition temperature occurred in steel containing0.18%Nb,and further increase of niobium brought about an increase of transition *** transition temperature of ferritic stainless steel was raised severely by the precipitation of nitrides(Cr2N,Cr2Nb2N2and TiN)and oxides(Al2O3)promoting brittle crack initiation.

关键词： ferritic stainless steel embrittlement cleavage

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问题解决模式下护理对糖尿病足感染患者心理韧性和创面愈合的影响

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糖尿病新世界 2024年第10期27卷 113-116,124页

作者：尹慧敏于衍妮卢世英日照市中心医院山东日照276800

目的分析问题解决模式下护理对糖尿病足感染患者心理韧性和创面愈合的影响。方法选取2021年1月—2023年8月山东省日照市中心医院疝血管创面外科收治的108例糖尿病足感染患者为研究对象。以不同护理方法分为对照组与观察组,各54例。对照... 详细信息

目的分析问题解决模式下护理对糖尿病足感染患者心理韧性和创面愈合的影响。方法选取2021年1月—2023年8月山东省日照市中心医院疝血管创面外科收治的108例糖尿病足感染患者为研究对象。以不同护理方法分为对照组与观察组,各54例。对照组采用常规护理,观察组采用问题解决模式。比较两组心理韧性(内控性、有势力的他人控制、机遇)、血糖指标(空腹血糖、餐后2 h血糖)、创面愈合时间、生活质量(生理功能、心理/精神、社会关系、治疗难度)。结果干预后,观察组心理韧性评分高于对照组,差异有统计学意义(P<0.05);观察组血糖指标、创面愈合时间均低于对照组,差异有统计学意义(P均<0.05);观察组生活质量评分均低于对照组,差异有统计学意义(P均<0.05)。结论问题解决模式应用于糖尿病足感染患者,可改善患者心理韧性程度,提高生活质量。

关键词：问题解决模式糖尿病足感染心理韧性生活质量

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Pandemic Bonds Issued by the Chinese Government Supported Post-Disaster Recovery from COVID-19 Pandemic

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Journal of Social Computing 2022年第2期3卷 158-170页

作者： Feng Liu Deli Kong Jinhua Kong shiying lu Zilong Xiao Qing Xu Aimin Zhou Jiayin Qi the Institute of AI for Education and also with the School of Computer Science and TechnologyEast China Normal UniversityShanghai 200062China the School of Business and Management Shanghai International Studies UniversityShanghai 201620China the Institute of Artificial Intelligence and Change Management Shanghai University of International Business and EconomicsShanghai 200336China the School of Statistics and Information Shanghai University of International Business and EconomicsShanghai 201620China the Department of Economics and Management Changsha University of Science and Technology410000 ChangshaChina the Department of Data Science and Computer Science Sun Yat-sen UniversityGuangzhou 510080China the Department of Software Beijing University of Posts and TelecommunicationsBeijing 100876China

During the SARS-CoV-2(COIVD-19)outbreak,China repeatedly stressed that the response to the pandemic required action at all levels of government,including the issuance of Pandemic Bonds to help the country return to work and ***,studies on the effectiveness of Pandemic Bonds during that period are *** with China’s national financial bond market data after COVID-19 in 2020,this paper focuses on the correlation between the Credit Spreads of the relevant bonds and the corresponding bond market rate of return,based on the Copula *** empirical analysis is also carried out for multiple dimensional groupings such as enterprises,industries,provinces,and bond *** results show that there is a significant positive correlation between the Credit Spreads of Pandemic Bonds and market *** addition,the market correlation is higher for Pandemic Bonds issued in Hubei Province,which is at the center of the 2020 pandemic,and the shorter the maturity of the Pandemic Bond issued,the stronger the relationship with market ***,this paper provides recommendations for financial regulators and policy makers to consider in their decisions on how to build a more resilient financial system under heavy economic,fiscal,and social pressures.

关键词： COVID-19 Pandemic Bond Credit Spread Copula model

Damping Characteristic Analysis and Optimization of Wind-thermal-bundled Power Transmission by LCC-HVDC Systems

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 299-312页

作者： Liwen Zheng shiying Ma the Power System Department China Electric Power Research InstituteBeijing 100192China

With the rapid development of renewable energy,wind-thermal-bundled power transmission by line-commutated converter based high-voltage direct current(LCC-HVDC)systems has been widely *** dynamic interaction mechanisms among permanent magnet synchronous generators(PMSGs),synchronous generators(SGs),and LCC-HVDC system become *** deal with this issue,a path analysis method(PAM)is proposed to study the dynamic interaction mechanism,and the damping reconstruction is used to analyze the damping characteristic of the ***,based on the modular modeling,linearized models for the PMSG subsystem,the LCC-HVDC subsystem,and the SG subsystem are ***,based on the closed-loop transfer function diagram of the system,the disturbance transfer path and coupling relationship among subsystems are analyzed by the PAM,and the damping characteristic analysis of the SG-dominated oscillation mode is studied based on the damping *** with the PAM,the small-signal model of the system is obtained and eigenvalue analysis results are ***,the effect of the control parameters on the damping characteristic is analyzed and the conclusions are verified by time-domain ***,the penalty functions of the oscillation modes and decay modes are taken as the objective function,and an optimization strategy based on the Monte Carlo method is proposed to solve the parameter optimization *** simulation results are presented to validate the effectiveness of the proposed strategy.

关键词： Wind-thermal-bundled power transmission line-commutated converter based high-voltage direct current(LCC-HVDC) path analysis method(PAM) damping characteristic analysis Monte Carlo method

Astrocyte syncytium:from neonatal genesis to aging degeneration

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Neural Regeneration Research 2024年第2期19卷 395-396页

作者： Min Zhou shiying Zhong Alexei Verkhratsky Department of Neuroscience Ohio State University Wexner Medical CenterColumbusOHUSA Faculty of Biology Medicine and HealthThe University of ManchesterManchesterUK Achücarro Basque Center for Neuroscience IKERBASQUEBasque Foundation for ScienceBilbaoSpain Department of Neurosciences University of the Basque Country UPV/EHU and CIBERNEDLeioaSpain

Modern neuroscience began from all reaching and fierce conflict between“neuronismo and reticulismo”——between neuronal and reticular theories of the organization of the nervous system;the conflict culminated in December of 1906 in Stockholm where Santiago Ramon y Cajal(the proponent of the neuronal doctrine)and Camillo Golgi(who advocated the syncytial reticular organization of neural networks)delivered their Noble prize lectures(Verkhratsky,2009).

关键词： degeneration neonatal aging

U-Pb zircon geochronology of basaltic pyroclastic rocks from the basement beneath the Xisha Islands in the northwestern South China Sea and its geological significance

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Acta Oceanologica Sinica 2024年第2期43卷 83-93页

作者： Yu Zhang Kefu Yu shiying Li Guangxi Laboratory on the Study of Coral Reefs in the South China Sea Guangxi UniversityNanning 530004China Coral Reef Research Center of China Guangxi UniversityNanning 530004China School of Marine Sciences Guangxi UniversityNanning 530004China Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of ScienceGuangzhou 510301China

As one of the micro-blocks dispersed in the South China Sea(SCS), the basement of the Xisha Islands has rarely been drilled because of the thick overlying Cenozoic sediments, which has led to a confused understanding of the pre-Cenozoic basement of the Xisha Islands. Well CK-1, a kilometer-scale major scientific drill in the Xisha Islands in the northwestern SCS, penetrated thick reefal limestone(0–888.4 m) and the underlying basement rocks(888.4–901.4 m). In this study, we present the zircon U-Pb ages of basement basaltic pyroclastic rocks from Well CK-1 in the Xisha Islands of the northwestern SCS to investigate the basement nature of the Xisha microblock. The basement of Well CK-1 consists of basaltic pyroclastic rocks on the seamount. The zircon grains yielded apparent ages ranging from ca. 2 138.9 Ma to ca. 36 Ma. The old group of zircon grains from Well CK-1 was considered to be inherited zircons. Two Cenozoic zircons gave a weighted mean 206Pb/238U age of(36.3 ± 1.1) Ma,Mean Squared Weighted Deviations(MSWD) = 1.2, which may represent the maximum age of the volcano eruption. The Yanshanian inherited zircons(116.9–105.7 Ma and 146.1–130.2 Ma) from Well CK-1 are consistent with the zircons from Well XK-1, indicating that the basement of Chenhang Island may be similar to that of Well XK-1. We propose that the Xisha micro-block may have developed on a uniform Late Jurassic metamorphic crystalline basement, intruded by Cretaceous granitic magma.

关键词： South China Sea Xisha Islands basaltic pyroclastic rocks zircon

Feedback enhanced tumor targeting delivery of albumin-based nanomedicine to amplify photodynamic therapy by regulating AMPK signaling and inhibiting GSTs

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Chinese Chemical Letters 2024年第8期35卷 481-485页

作者： Jiaqi Huang Renjiang Kong Yanmei Li Ni Yan Yeyang Wu Ziwen Qiu Zhenming lu Xiaona Rao shiying Li Hong Cheng School of Biomedical Engineering&Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering Southern Medical UniversityGuangzhou 510515China School of Pharmaceutical Sciences Guangzhou Medical UniversityGuangzhou 511436China

Oxidative therapies receive a limited antitumor efficiency due to the insufficient reactive oxygen species(ROS)levels at focal sites and the evolvement of antioxidant defense ***,we develop an albumin-based nanomedicine to co-deliver chlorin e6(Ce6)and COH-SR4(CS),which can simultaneously enhance the yield and lethality of intracellular ROS for amplified photodynamic therapy(PDT).In which,CS acts as both an activator of AMP-activated protein kinase(AMPK)and an inhibitor of glutathione S-transferases(GSTs).Benefiting from it,the prepared HSA-Ce6@COH-SR4(HCCS)enables positive feed-back uptake by promoting AMPK phosphorylation,leading to rapid and extensive tumor accumulation of *** a result,HCCS obviously increases the ROS production to elevate intracellular oxidative ***,HCCS can inhibit GSTs to disturb the antioxidant defense system of tumor cells,intensifying the oxidative damage of ***,the PDT of HCCS is significantly strengthened by improving the ROS yield and lethality,which greatly declines the proliferation of breast cancer in *** study may open a window in the development of drug co-delivery system for enhanced oxidative therapy of tumors.

关键词： Human serum albumin Drug delivery Reactive oxygen species Positive feedback uptake Oxidative damage

Regulating the crystal phase of bismuth-based semiconductors for promoted photocatalytic performance

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Science China Chemistry 2024年第6期67卷 1839-1864页

作者： Zhaohui Wu Mei-Chi Chong shiying Zhang Junshan Li Yongfa Zhu Hunan Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha410022China Department of Chemistry Tsinghua UniversityBeijing100084China Institute for Advanced Study Chengdu UniversityChengdu610106China

Numerous bismuth-based semiconductors(BBSs)with sophisticated and desirable structures used as photocatalysts for efficient photocatalytic degradation of water organic contaminants have attracted considerable ***,regulating the crystal phases and phase transition of BBSs for promoted photocatalytic performance is ***,the unique crystal structure and band structure features of each typical BBSs,and the vital roles on phase controlling of each phase were systematically presented based on the classification of ***,the critical factors for the phase transition of BBSs and intrinsic driving forces endowed by phases of BBSs for enhanced photocatalytic performance of organic contaminants removal were also *** review will provide systematical guidelines and horizons for regulating the crystal phase and phase transition of BBSs,promoting photocatalytic degradation and mineralization of organic contaminants.

关键词： bismuth-based semiconductors phase regulation photocatalytic performances organic contaminants

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在腐蚀环境中,不锈钢的合理选择

钢铁 1985年第12期20卷 3-16页

作者：陆世英钢铁研究总院

不锈钢的钢种很多,性能各异且用途相当广泛,它们在各种工业中,例如化工、石油、核工、轻纺、航空及航天等工业中均获得大量应用。它们的正确、合理选择不仅重要,而且具有相当的难度。既需要了解各种不锈钢的全面性能,又要有丰富的实践... 详细信息

不锈钢的钢种很多,性能各异且用途相当广泛,它们在各种工业中,例如化工、石油、核工、轻纺、航空及航天等工业中均获得大量应用。它们的正确、合理选择不仅重要,而且具有相当的难度。既需要了解各种不锈钢的全面性能,又要有丰富的实践经验。本文介绍了选择不锈钢时需考虑的因素;不锈钢的分类及性能特点;在各种腐蚀环境中,为解决一般腐蚀和局部腐蚀,不锈钢合理选择的方向。

关键词：不锈钢产量 Ni Cr 孔蚀缝隙腐蚀钢中局部腐蚀一般腐蚀点蚀间隙腐蚀马氏体钢马氏体不锈钢马丁体不锈钢腐蚀环境