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基于格子玻尔兹曼方法的井筒热流固耦合数值模拟

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计算物理 2024年第3期41卷 316-324页

作者：胡春余中石化新疆新春石油开发有限责任公司新疆乌苏833300

基于格子玻尔兹曼方法(LBM)建立一种求解井筒温度分布的模型。该模型可同时求解井筒内流体的温压耦合流动、流体流动中的强制热对流和井筒与地层的流固热交换三种效应的控制方程,实现井筒内流体域流动场-流体域温度场-固体域温度场三场... 详细信息

基于格子玻尔兹曼方法(LBM)建立一种求解井筒温度分布的模型。该模型可同时求解井筒内流体的温压耦合流动、流体流动中的强制热对流和井筒与地层的流固热交换三种效应的控制方程,实现井筒内流体域流动场-流体域温度场-固体域温度场三场的耦合求解,克服了传统模型井筒流速为定值的缺陷,并且具有更广的适用范围。通过理论分析和对比分析,验证模型的可靠性和精度。研究结果表明:井筒内流体流速变化影响流体在井筒中的温度分布,在产出条件下,在同一深度处会造成流体中心温度高、流体边界处温度低的分布情况。流体沿井筒轴向的温度的下降趋势会经历缓-稳-缓三个阶段,且此三个阶段受到流动雷诺数或者流体普朗特数的影响。

关键词：井筒温度井筒压力格子玻尔兹曼普朗特数耦合计算

Personalized surgical recommendations and quantitative therapeutic insights for patients with metastatic breast cancer: Insights from deep learning

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Cancer Innovation 2024年第3期3卷 65-80页

作者： Enzhao Zhu Linmei Zhang Jiayi Wang chunyu hu Qi Jing Weizhong Shi Ziqin Xu Pu Ai Zhihao Dai Dan Shan Zisheng Ai School of Medicine Tongji UniversityShanghaiChina Shanghai Engineering Research Center of Tooth Restoration and Regeneration Research Institute of StomatologyStomatological Hospital and Dental School of Tongji UniversityShanghaiChina Tenth People's Hospital of Tongji University School of MedicineTongji UniversityShanghaiChina Department of Anesthesiology and Perioperative Medicine Shanghai Fourth People's HospitalSchool of MedicineTongji UniversityShanghaiChina Shanghai Hospital Development Center ShanghaiChina Columbia University New YorkNYUSA School of Medicine Royal College of Surgeons in IrelandUniversity of Medicine and Health SciencesDublinIreland Department of Biobehavioral Sciences Columbia UniversityNew YorkNYUSA Department of Medical Statistics School of MedicineTongji UniversityShanghaiChina Clinical Research Center for Mental Disorders Chinese-German Institute of Mental HealthShanghai Pudong New Area Mental Health CenterSchool of MedicineTongji UniversityShanghaiChina

Background:The role of surgery in metastatic breast cancer(MBC)is currently controversial.Several novel statistical and deep learning(DL)methods promise to infer the suitability of surgery at the individual level.Objective:The objective of this study was to identify the most applicable DL model for determining patients with MBC who could benefit from surgery and the type of surgery required.Methods:We introduced the deep survival regression with mixture effects(DSME),a semi-parametric DL model integrating three causal inference methods.Six models were trained to make individualized treatment recommendations.Patients who received treatments in line with the DL models'recommendations were compared with those who underwent treatments divergent from the recommendations.Inverse probability weighting(IPW)was used to minimize bias.The effects of various features on surgery selection were visualized and quantified using multivariate linear regression and causal inference.Results:In total,5269 female patients with MBC were included.DSME was an independent protective factor,outperforming other models in recommending surgery(IPW-adjusted hazard ratio[HR]=0.39,95%confidence interval[CI]:0.19–0.78)and type of surgery(IPW-adjusted HR=0.66,95%CI:0.48–0.93).DSME was superior to other models and traditional guidelines,suggesting a higher proportion of patients benefiting from surgery,especially breast-conserving surgery.The debiased effect of patient characteristics,including age,tumor size,metastatic sites,lymph node status,and breast cancer subtypes,on surgery decision was also quantified.Conclusions:Our findings suggested that DSME could effectively identify patients with MBC likely to benefit from surgery and the specific type of surgery needed.This method can facilitate the development of efficient,reliable treatment recommendation systems and provide quantifiable evidence for decision-making.

关键词： breast surgery causal inference deep learning metastatic breast cancer

Give Full Play to Foreign Exchange Inspection and Guard Against the Risks of Cross-Border Capital Flows

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China Forex 2022年第1期 37-39页

作者： hu chunyu SAFE'S Supenision and Inspection Department

China Forex:In 2021,what measures did the Supervision and Inspection Department carry out?What are the outstanding features?hu chunyu:In 2021,guided by Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era,the foreign exchange inspection department under the strong leadership of the Party Central Committee,the State Council and the Party Group of the State Administration of Foreign Exchange(SAFE),closely followed the work requirements of"based on the new development stage,implementing new development concepts,building a new development pattern,and achieving high-quality development",and adhered to the bottom line thinking and the systematic concept.

关键词： Guard Exchange carry

Cooperative Co-evolutionary Artificial Bee Colony Algorithm Based on Hierarchical Communication Model

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Chinese Journal of Electronics 2016年第3期25卷 570-576页

作者： hu chunyu LIU Hong ZHANG Peng School of Information Science and Engineering Shandong Normal University Shandong Provincial Key Laboratory for Novel Distributed Computer Software Technology

Canonical Artificial bee colony(ABC) algorithm with a single species is insufficient to extend the diversity of solutions and may be trapped into the local optimal solution. This paper proposes a new co-evolutionary ABC algorithm(HABC) based on Hierarchical communication model(HCM). HCM combines advantages of global and local communication pattern. With adjustment strategies on species and groups, HCM can reduce the computational complexity dynamically. Performance tests show that the HABC algorithm exhibit good performance on accuracy, robustness and convergence speed. Compared with ABC and Integrated co-evolution algorithm(IABC),HABC performs better in solving complex multimodal functions.

关键词： Artificial bee colony(ABC) algorithm Multi-species co-evolution Hierarchical communication model(HCM) Dynamical adjustment

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计划火烧对红松人工林细根生物量的影响

生态学杂志 2024年第2期43卷 362-371页

作者：孙龙胡春雨胡同欣东北林业大学林学院森林生态系统可持续经营教育部重点实验室哈尔滨150040

细根作为植物重要的功能器官,是植物和土壤养分传输的重要通道。计划火烧是重要的营林方式。研究计划火烧对细根生物量的影响,将有助于深入了解植物群落组成和生态系统的地下竞争作用。本研究以鹤岗红松人工林为对象,设置对照和火烧两... 详细信息

细根作为植物重要的功能器官,是植物和土壤养分传输的重要通道。计划火烧是重要的营林方式。研究计划火烧对细根生物量的影响,将有助于深入了解植物群落组成和生态系统的地下竞争作用。本研究以鹤岗红松人工林为对象,设置对照和火烧两种样地,于2018年11月初开展计划火烧,利用内径7 cm的土壤钻进行细根和土壤的采集,样品分为0~10和10~20 cm上、下两层,测得细根生物量组成变化,分析计划火烧后土壤性质变化以及细根生物量的主要影响因子。结果表明:计划火烧后上、下层活细根生物量分别显著减少5.7%~16.3%和6.1%~12.4%,上、下层死细根生物量分别显著增加8.5%~17.4%和5.1%~14.1%。计划火烧后乔木上、下层细根生物量分别显著减少17%和10%,草本上、下层细根生物量分别显著增加14%和9%。此外,计划火烧显著增加上、下层吸收根生物量与运输根生物量的比例5.7%~12.9%和4.2%,提高吸收根在细根中所占的比例。计划火烧前后细根生物量对土壤因子做出不同的响应。根据RDA分析可知,计划火烧后的细根生物量主要受土壤温度、含水率和铵态氮含量影响。温度升高促进细根生物量的增加,乔木和草本吸收根生物量与土壤含水率呈显著正相关。乔木吸收根生物量与铵态氮含量呈显著正相关。综上所述,红松人工林细根生物量在植物生活型、细根功能类型组成和土壤影响因子上对计划火烧做出响应。本研究揭示了计划火烧对红松人工林细根生物量的影响,为合理开展计划火烧提供理论支持。

关键词：计划火烧细根生物量土壤理化性质功能类型影响因子

Improve Micro-Regulation of Foreign Exchange Market and Strengthen the Barrier to Cross-Border Financial Security

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China Forex 2023年第1期 46-47页

作者： hu chunyu SAFE's Supervision and Inspection Department

China Forex:Compared to 2022,what will the situation be like with regard to foreign exchange inspection work in 2023?What are the direction and key points of the corresponding work?hu chunyu:The Central Economic Work Conference pointed out that the current foundation for China's economic recovery is not solid,and now China's economy is still facing great pressure in terms of demand contraction,supply shock,and weakening expectations.

关键词： Market Financial inspection

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生物法抑硫提高污水配聚黏度

山东石油化工学院学报 2024年第1期38卷 73-76页

作者：胡春余中石化新疆新春石油开发有限责任公司勘探开发技术研究中心山东东营257099

油田污水系统普遍存在硫酸盐还原菌(SRB),其代谢产生的硫离子导致污水稀释配聚过程中聚合物溶液黏度损失。采用生物竞争方法,通过投加反硝化抑制剂和功能细菌,对生物法抑硫处理后污水稀释配聚黏度稳定性进行评价,对稳黏机理进行分析。... 详细信息

油田污水系统普遍存在硫酸盐还原菌(SRB),其代谢产生的硫离子导致污水稀释配聚过程中聚合物溶液黏度损失。采用生物竞争方法,通过投加反硝化抑制剂和功能细菌,对生物法抑硫处理后污水稀释配聚黏度稳定性进行评价,对稳黏机理进行分析。实验结果表明:生物法抑硫处理后污水稀释配聚30 d后黏度仍达34 mPa·s以上,黏度保留率大于80%。微生物群落结构分析显示生物法抑硫处理通过激活污水中的反硝化细菌与SRB竞争营养底物,从而限制SRB活性,防止SRB代谢产生的硫离子对聚合物的降解。

关键词：硫酸盐还原菌硫化氢生物竞争聚丙烯酰胺稳黏

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基于模糊逻辑的人为差错概率量化方法

兵工自动化 2024年第3期43卷 82-86,91页

作者：蒋英杰胡春宇梁永治中国人民解放军96753部队济南271100

为满足人机系统概率风险评估的需要,提出一种人为差错概率量化方法。分析技能、规则和知识为基础(skill,rule and knowledge-based,SRK)框架和行为模式的确定方法Hanaman决策树法,指出在确定行为模式的过程中考虑行为模式影响因素的不... 详细信息

为满足人机系统概率风险评估的需要,提出一种人为差错概率量化方法。分析技能、规则和知识为基础(skill,rule and knowledge-based,SRK)框架和行为模式的确定方法Hanaman决策树法,指出在确定行为模式的过程中考虑行为模式影响因素的不确定性是必要的;使用模糊逻辑方法处理行为模式各个影响因素的不确定性,根据Hanaman决策树构建模糊推理规则,利用系统人为行为可靠性程序(systematic human action reliability procedure,SHARP)方法所提供的人为差错概率区间确定人为差错概率的隶属度函数。结果表明:该方法考虑了任务场景的不确定性,可以得到人为差错概率的精确值,满足人机系统概率风险评估的需要。

关键词：人为差错概率模糊逻辑方法行为模式人因可靠性分析

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基于工程数据的行为形成因子权重确定方法

兵工自动化 2024年第4期43卷 87-90页

作者：蒋英杰胡春宇梁永治中国人民解放军96753部队济南271100

针对行为形成因子影响人员行为的问题,提出一种行为形成因子权重的确定方法。评述现有的行为形成因子权重确定方法,指出存在的缺陷和不足,构建一种基于工程数据的行为形成因子权重确定方法。结果表明:该方法能得到不同人为差错类型所对... 详细信息

针对行为形成因子影响人员行为的问题,提出一种行为形成因子权重的确定方法。评述现有的行为形成因子权重确定方法,指出存在的缺陷和不足,构建一种基于工程数据的行为形成因子权重确定方法。结果表明:该方法能得到不同人为差错类型所对应行为形成因子的权重,更具客观性,可为人为差错的管理提供有效指导,为人为差错概率量化提供支持。

关键词：行为形成因子人为差错人因可靠性分析人为差错管理