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Petroleum 2022年第3期8卷 352-362页

作者： Chengyuan Xu honglin zhang Mingming Zhu Yili Kang Xiaopeng Yan Jingyi zhang Yingrui Bai State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduChina School of Petroleum Engineering China University of Petroleum(East China)QingdaoChina Changqing Drilling Branch CNPC Chuanqing Drilling Engineering Co.Ltd.Xi'an 710000China

Working fluids loss is a major contributor to low productivity during production process of fractured tight reservoirs.Lost circulation control effect directly related to the tribological behavior between fracture surface and lost circulation materials(LCMs).In this study,the friction coefficient(FC)was investigated using typical clastic rocks and LCMs by considering multiple effect factors divided into external condition and internal condition.The results show that normal load had a relatively high effect on sliding model.A positive correlation was observed between FC and asperities heights.FC decreased induced by particle size degradation of rigid LCMs.Elastic LCMs manifested higher FC compared with rigid LCMs.Under the lubrication condition by working fluid,FC of rigid LCMs was mainly controlled by their surface wettability.FC of organic LCMs is more sensitive to high temperature aging than inorganic LCMs.Fracture plugging experiments show that LCMs optimized based on the research results can effectively improve the efficiency and strength of fracture plugging.

关键词： Fractured tight reservoirs Lost circulation control Friction coefficient Lost circulation materials

Optimization of Callus Induction Conditions from Immature Embryos of Maize under Stress

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Phyton-International Journal of Experimental Botany 2022年第9期91卷 1945-1957页

作者： Xiaotong Wei Xuhong Fan Xuan Lu Liyuan Han honglin zhang Siyan Liu Jing Qu Shuyan Guan Yiyong Ma College of Life Sciences Jilin Agricultural UniversityChangchun130118China Jilin Academy of Agricultural Sciences Changchun130118China Joint Laboratory of International Cooperation in Modem Agricultural Technology of Ministry of Education Jilin Agricultural UniversityChangchun130118China

The embryos of maize(Zea mays L.)inbred lines GS02,GS07,GS08,GS11 and GS15 were used as receptor materials to optimize the receptor system from the aspects of genotype,medium components and stress(PEG6000,mannitol,salt and low phosphorus).The results showed that GS07 had the highest induction rate(95.2%).Orthogonal test analysis showed that the best combination of medium components in induction was A2B3C1D3(2),namely,the concentration of 2,4-dichlorophenoxy acetic acid(2,4-D)was 4 mg·mL^(-1),the concentration of L-Proline(L-Pro)was 0.8 mg·mL^(-1),and the concentration of silver nitrate(AgNO3)was 10 mg·mL^(-1)(or 5 mg·mL).Interestingly,we found that the optimal medium supplemented with 30 g·L^(-1)PEG6000 or 80 g·L^(-1)mannitol was suitable for antioxidant enzyme activity and malondialdehyde(MDA)content in GS07 callus.Exogenous 10 mmol·L^(-1)Ca^(2+)in the medium components with 100 mmol·L^(-1)sodium chloride(NaCl)could improve the activity of antioxidant enzymes in GS07 callus.Callus of GS07 could divide normally and grow well in medium components with 27 mg·L^(-1)KH_(2)PO_(4).This study enhanced the adaptability of maize callus to stress and optimized the culture conditions.

关键词： Maize immature embryo adversity stress medium optimization

Kinetics process of room temperature phosphorescence and fluorescence of gadolinium porphyrin in aqueous solution

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Journal of Rare Earths 2021年第10期39卷 1187-1193,I0001页

作者： Ting Liu Xiyu zhang honglin zhang Hua Zhao Zhiguo zhang Ye Tian Condensed Matter Science and Technology Institute Harbin Institute of TechnologyHarbin 150001 China School of Materials and Engineering Harbin Institute of TechnologyHarbin 150001China Division of Cardiology The First Affiliated HospitalHarbin Medical UniversityHarbin 150001China

The behavior of room temperature phosphorescence quenching and fluorescence enhancing of gadolinium labeled sinoporphyrin sodium(Gd-DVDMS) in the aqueous solution were studied.Gd-DVDMS was characterized by various techniques including mass spectra,Fourier transform infrared spectra and transmission electron microscopy.The optical behavior was monitored through UV-vis absorption spectra and photoluminescence spectra.The result shows that the phosphorescence intensity gradually quenches,almost disappears after dissolved 120 min,meanwhile the fluorescence intensity enhances 5 times.The above behavior is attributed to the decreased population of Gd-DVDMS as first excited triplet state(T1),Based on the time-invariant of both absorption spectra and phosphorescence decay curves at710 nm of Gd-DVDMS in different dissolution time,the reason for the decreased population of GdDVDMS in T1 state is that the intersystem crossing from first excited state(S1) to T1 is prevented.In addition,the fluorescent decay curves of Gd-DVDMS initially dissolved in the aqueous solution and dissolved for 120 min were also measured for comparison.The big change in fluorescent lifetime further proves the conclusion that intersystem crossing is prevented,meanwhile,the increase in fluorescence intensity is demonstrated.In this work,the possibility of decomposition of Gd-DVDMS is excluded because the phosphorescence decay curve in Gd-DVDMS aqueous solution is sensible to DVDMS.

关键词： Gd-DVDMS Phosphorescence Fluorescence Aqueous solution Intersystem crossing Rare earths

基于结构方程模型研究环境因子对毛里塔尼亚双拖鲣CPUE的影响

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中国水产科学 2024年第4期31卷 465-475页

作者：张鸿霖马有成宋厚成张健曾志坚上海海洋大学海洋科学学院国家远洋渔业工程技术研究中心上海海洋大学大洋渔业资源可持续开发教育部重点实验室上海海洋大学农业农村部大洋渔业开发重点实验室上海海洋大学宏东渔业股份有限公司

探索渔业资源丰度与环境因子的关系,并掌握种群分布对环境变化的响应机制,是养护资源、实现渔业可持续发展的基础。然而,渔业资源的变化受多个环境因素的综合影响,这些因素之间存在复杂且相关的关系。目前的研究主要集中于环境因子对种... 详细信息

探索渔业资源丰度与环境因子的关系,并掌握种群分布对环境变化的响应机制,是养护资源、实现渔业可持续发展的基础。然而,渔业资源的变化受多个环境因素的综合影响,这些因素之间存在复杂且相关的关系。目前的研究主要集中于环境因子对种群分布和资源丰度等直接影响,而忽视了环境因素之间的相互作用。为了探索不同环境因子及其相互关系对毛里塔尼亚双拖鲣种群资源量的影响机制与路径,本研究基于2017—2019年毛里塔尼亚海域双拖渔业鲣(Katsuwonuspelamis)单位捕捞努力量渔获量(CPUE),采用结构方程模型(SEM)构建海表面温度(SST)、海表面盐度(SSS)、海面高度异常(SLA)、溶解氧(DO)和叶绿素a浓度(Chl-a) 5个环境因子对鲣CPUE直接和间接影响。结果表明:SEM模型具有良好的拟合效果; SST、SSS、SLA、DO和Chl-a对鲣CPUE均有直接影响,其中DO和SLA对CPUE有着显著正相关影响,而SST、SSS和Chl-a对CPUE有显著负相关影响; SST等环境因子还会通过多种路径对鲣CPUE产生间接影响。研究揭示了毛塔海域SST通过直接影响或通过影响其他环境因子而间接影响鲣种群资源变动的潜在机制。

关键词：鲣拖网 CPUE 结构方程模型环境因子影响路径

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基于机器学习的航天器规避目标威胁博弈决策

航空学报 2024年第8期45卷 244-259页

作者：张鸿林罗建军马卫华西北工业大学航天学院西安710072 航天飞行动力学技术重点实验室西安710072

针对航天器规避空间目标抵近威胁的决策问题,提出了一种智能决策框架和基于深度强化学习的自主决策方法。考虑到空间目标的机动特性和威胁规避的博弈性,基于感知-判断-决策-执行(OODA)环决策思想和机器学习方法,提出了一种航天器威胁规... 详细信息

针对航天器规避空间目标抵近威胁的决策问题,提出了一种智能决策框架和基于深度强化学习的自主决策方法。考虑到空间目标的机动特性和威胁规避的博弈性,基于感知-判断-决策-执行(OODA)环决策思想和机器学习方法,提出了一种航天器威胁规避智能博弈决策框架。基于该框架和对空间目标运动意图的推理,为了使航天器决策控制具备博弈应对能力,设计了基于深度强化学习的航天器机动决策算法和训练环境,实现了对空间目标典型运动意图的规避应对;进一步地,采用自我博弈学习训练提升航天器自主机动决策算法的泛化性和应对目标不确定机动的适应能力。最后,通过算例仿真及分析,验证了所提方法的有效性。

关键词：航天器机动智能决策威胁规避 OODA环深度强化学习

Applications of a Streaming Video Server in a Mobile Phone Live Streaming System

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Journal of Software Engineering and Applications 2014年第12期7卷 975-982页

作者： Chongyu Wei honglin zhang Qingdao University of Science and Technology Qingdao China

This paper describes the entire process of completing a multicast streaming media server and applying it to a cellphone live streaming system. By using the RTSP protocol, the streaming media server controls the connection of video capture client, data stream reception and processing as well as playback interaction. The media server can publish real-time data from a data acquisition terminal or a historical data file in the server to the Web so that users on the network can view all the videos through a variety of terminals anytime and anywhere, without having to wait for all the data downloaded completely. The streaming media server of the system is developed based on an open-source streaming media library Live555. The developed server can run on a Windows or a Linux system. The standard RTSP/RTP protocol is used and the video media format is H264. The paper mainly introduces the design of a streaming media server, including data processing for real time, designing a data source, the implementation of multi-acquisition end and multi-player operation, RTSP interaction and RTP packaging, and the setting up of the data buffer in the server. Experiment results are given to show the effect of the system implementation.

关键词： Live Streaming Streaming Media Live555 RTSP RTP H264

基于肠-关节轴探讨中药治疗类风湿关节炎的研究进展

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中国实验方剂学杂志 2024年第6期30卷 262-268页

作者：张红林蒋海旭韦秋竹孙钰禾赵子涵陆清怡北京中医药大学生命科学学院北京100029 北京中医药大学中药学院北京100029

类风湿关节炎(RA)是以局部关节疼痛为主要临床表现的系统性自身免疫性疾病,是中医临床治疗的优势病种之一。RA的起病不仅与基因等先天因素相关,而且与饮食、微生物感染等环境因素相关。肠道是人体重要的消化器官和免疫器官,定植其中的... 详细信息

类风湿关节炎(RA)是以局部关节疼痛为主要临床表现的系统性自身免疫性疾病,是中医临床治疗的优势病种之一。RA的起病不仅与基因等先天因素相关,而且与饮食、微生物感染等环境因素相关。肠道是人体重要的消化器官和免疫器官,定植其中的微生物促进了肠道的物质代谢、屏障保护和免疫调节功能。随着对RA发病和治疗研究的深入,肠道的结构和功能异常与RA发病、进展具有的潜在联系不断被揭示。临床和实验研究表明,RA关节炎症与受损的肠道屏障功能、失调的免疫细胞及紊乱的肠道菌群几乎同时可见。“肠-关节轴”理论与中医的整体观念高度一致。在近期对中药治疗RA的药理研究中,人们发现治疗RA的有效中药复方及成分同时发挥了抑制炎症、保护关节和维持肠道功能的作用。因此,该文总结了“肠-关节轴”的基本内涵和中药通过调节肠道菌群结构、改善微生物代谢来发挥肠道的屏障保护和免疫调节作用,从而缓解RA的机制。该综述为RA中“肠-关节轴”的深入研究提供了借鉴。

关键词：类风湿关节炎中药肠-关节轴肠道菌群

Value of TCD foaming Test in Screening Patent Foramen Ovale in Migraine Patients and Efficacy of PFO Occlusion

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Proceedings of Anticancer Research 2021年第2期5卷 31-34页

作者： Lilan Du Xiaorong Guo honglin zhang Min zhang Guangli Zou Department of Neurology Chongqing General HospitalUniversity of Chinese Academy of SciencesChongqing 401147China

Objective:To explore the effect of TCD foaming test in screening patent foramen ovale in migraine patients,as well as in the treatment effect.Methods:From September 2019 to August 2020,236 patients with migraine and 362 patients with normal physical examination were treated in our hospital.According to the random number table method,60 patients with migraine were selected as the observation group,and 60 patients with normal physical examination were selected as the control group.48 cases of PFO were confirmed by TCD foaming test Among the patients with migraine,36 patients received interventional occlusion therapy.The therapeutic effect and VAS score of the two groups were analyzed.Results:Through TCD foaming test,the proportion of PFO in the observation group was 80%,and that in the control group was 13.33%.The proportion of PFO in the observation group was significantly higher than that in the control group,and the difference was statistically significant(χ^(2)=53.5714,P<0.01);The symptoms disappeared in 30 patients and improved in 4 patients;Among the 36 patients who received interventional occlusion therapy,the VAS score of patients before and after the operation was significantly changed,and the proportion of patients whose pain disappeared after the operation was 83.33%,which was significantly lower than that before the operation,and the difference was comparable(χ^(2)=51.4286,P<0.01).Conclusion:TCD foaming test for PFO screening has strong applicability,not only safe and convenient,will not cause trauma to patients,and through interventional occlusion treatment,can significantly improve the clinical symptoms of migraine patients and cure patients.

关键词： Migraine TCD foaming test Patent foramen ovale Curative effect

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稽核系统改造方案及其应用

移动信息 2024年第1期46卷 53-55页

作者：肖逸枫董晓勇张宗之曾祥洪张洪林中国移动通信集团四川有限公司成都610084

稽核系统在现代组织中扮演着关键的角色,它不仅能确保财务活动的合规性,还承担着风险管理的重要职责。然而,随着业务环境的变化,传统的稽核系统也面临一些局限性和挑战。为了保持其有效性和适应性,稽核系统需要不断进行改造和优化。文... 详细信息

稽核系统在现代组织中扮演着关键的角色,它不仅能确保财务活动的合规性,还承担着风险管理的重要职责。然而,随着业务环境的变化,传统的稽核系统也面临一些局限性和挑战。为了保持其有效性和适应性,稽核系统需要不断进行改造和优化。文中探讨了一种基于稽核系统改造方案的应用,以提高其效率和准确性,提供更有效的风险管理。

关键词：稽核系统数据整合审计功能

下刚果—刚果扇浊积水道沉积演化与成藏主控因素——以A油田下中新统X砂组为例

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地质论评 2024年第S1期70卷 287-288页

作者：刘丽军周瑞胡俊峰程学峰任朝波方建明张红霖中国石化集团国际石油勘探开发有限公司北京100029

下刚果—刚果扇盆地为深水浊积岩油气勘探成功的典型含油气盆地。盆内广泛发育的浊积水道为重要储层类型,蕴含丰富的油气资源。前人从构造和沉积等角度对深水水道沉积模式及控制因素进行了大量研究,取得了长足进展(Henry et al.,2019;... 详细信息

下刚果—刚果扇盆地为深水浊积岩油气勘探成功的典型含油气盆地。盆内广泛发育的浊积水道为重要储层类型,蕴含丰富的油气资源。前人从构造和沉积等角度对深水水道沉积模式及控制因素进行了大量研究,取得了长足进展(Henry et al.,2019;陈华等,2021)。然而也有大量实钻资料表明水道体系内部砂体期次的沉积发育和叠置关系非常复杂,储层非均质性很强(张文彪等,2017)。

关键词：浊积水道沉积演化油气成藏主控因素下中新统下刚果—刚果扇盆地