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不同气体气调大豆毛油储藏期预测模型构建

中国粮油学报 2024年第4期39卷 17-24页

作者：王成龙邹真杨轶天庞林江管玉格路兴花金建德浙江农林大学食品与健康学院杭州311300 浙江省粮食局直属粮油储备库杭州311300

以大豆毛油为研究对象,研究其在不同气体(Ar、N_(2)、CO_(2))、不同体积分数(95%、98%)气调储藏过程中主要品质变化规律,构建预测模型并进行预测和验证,为毛油安全储藏及品质预测提供参考。结果表明,储藏期间N_(2)、Ar、CO_(2)气调油脂... 详细信息

以大豆毛油为研究对象,研究其在不同气体(Ar、N_(2)、CO_(2))、不同体积分数(95%、98%)气调储藏过程中主要品质变化规律,构建预测模型并进行预测和验证,为毛油安全储藏及品质预测提供参考。结果表明,储藏期间N_(2)、Ar、CO_(2)气调油脂POV分别比CK显著降低了72.7%~91.5%、74.2%~92.2%和75.7%~89.9%,气调处理抑制POV效果显著,且Ar效果最好,其次为N_(2)和CO_(2);Ar和N_(2)气调抑制AV效果显著,CO_(2)处理则具有显著促进作用。3种气体体积分数98%气调储藏大豆毛油POV和AV不同程度低于体积分数95%。基于POV,运用一级氧化动力学模型结合Arrhenius方程建立储藏期预测模型,拟合精度高(R^(2)>0.95),验证效果好,预测储藏期相对误差为8.3%。结合实测和预测模型预测结果得出,25、40、50、60℃情况下,CK组储藏期分别为69、38、26、19 d,Ar 98%和N_(2)98%组储藏期分别为155、104、83、66 d和129、92、76、63 d,Ar气调处理对维持大豆毛油储藏品质效果好于N_(2)气调,但差异不显著,且体积分数越高,效果越好。

关键词：大豆毛油气体气调储藏期预测模型

Comparative study on the inhibiting mechanism of inhibitor with primary amine groups and quaternary ammonium groups for sodium bentonite

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Petroleum 2023年第4期9卷 526-533页

作者： Gang Xie Yujing Luo chenglong wang Mingyi Deng Yang Bai State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China CNOOC Ltd. Zhanjiang524057China

Shale hydration and swelling is the main obstacle to the development of shale gas utilizing water-based drilling fluids(WBDFs).In this work,the inhibition mechanism of alkylammonium inhibitor and alkylamine inhibitor adsorbed on sodium bentonite(Na+Bent)are investigated using infrared spectroscopy(FT-IR),scanning electron microscopy(SEM),X-ray diffraction(XRD),zeta potential,particle size distribution tests,and thermogravimetry analysis(TGA).The results suggest that HTB and HMD can be inserted into the interlamination of Na+Bent and minimize the basal spacing compared to hydrated Na+*** and HMD are inserted between the Na+Bent layers in a single-layer tiled manner and replace the sodium ions that are firmly fixed between the ***,water molecules are removed from the interlayer Na+*** interaction between the quaternary ammonium group and Na+Bent is more significant than between the primary amine group and Na+*** inhibition performance suggests that HTB inhibits Na+Bent hydration and swelling more substantially than other inhibitors,indicating that the inhibition performance of the two quaternary ammonium groups is greater than that of the two primary amine ***,HTB can be used as intercalation inhibition in WBDFs and has tremendous application value.

关键词： Sodium bentonite Alkylammonium Alkylamine Inhibition performance

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小角中子散射谱仪放射性样品测量装置研制

核技术 2024年第6期47卷 19-25页

作者：胡文耀闫士博李天富王子军陈忠刘荣灯王成龙贺新福冉怀昌孙凯陈东风中国原子能科学研究院北京102413 生态环境部核与辐射安全中心北京100082

辐照试样研究对评估材料性能具有重要意义。因其带有放射性,常规表征手段受到一定限制,而小角中子散射(Small-Angle Neutron Scattering,SANS)技术几乎不受γ、β等射线的影响,且制样简单。依托中国先进研究堆小角中子散射谱仪,研发了... 详细信息

辐照试样研究对评估材料性能具有重要意义。因其带有放射性,常规表征手段受到一定限制,而小角中子散射(Small-Angle Neutron Scattering,SANS)技术几乎不受γ、β等射线的影响,且制样简单。依托中国先进研究堆小角中子散射谱仪,研发了一台放射性样品测量装置,用于放射性试样内部纳米结构的测量分析。装置的屏蔽厚度利用蒙特卡罗模拟进行优化,结合自动换样和远程控制功能,提高了实验效率和安全性。利用该装置成功开展了A508-Ⅲ钢辐照监督试样的小角中子散射实验,结果表明低剂量长周期辐照对压力容器钢纳米结构影响较小。该装置和相关技术方法可用于放射性试样的纳米结构表征。

关键词：小角中子散射放射性试样纳米结构 A508-Ⅲ钢

Recent changing patterns of the Changjiang(Yangtze River) Estuary caused by human activities

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Acta Oceanologica Sinica 2017年第4期36卷 87-96页

作者： wang chenglong ZHAO Yifei ZOU Xinqing XU Xinwanghao GE Chendong School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210023 China Ministry of Education Key Laboratory for Coast and Island Development Nanjing University Nanjing 210023 China Collaborative Innovation Center of South China Sea Studies Nanjing 210023 China

To evaluate the controlling factors for coastline change of the Changjiang（Yangtze River） Estuary since 1974,we extracted the mean high tide line from multi-temporal remote sensing images that span from 1974 to 2014 at 2-year *** chose 42 scenes to constrain the changing pattern of the Changjiang Estuary coastline,and implemented GIS technology to analyze the area change of the Changjiang（Yangtze） Subaerial ***,sediment discharge and coastal engineering were withal considered in the analysis of the coastline *** coastline has transgressed seaward since 1974,and a part of it presents inter-annual *** area of the Changjiang Subaerial Delta increased by 871 km2,with a net accretion rate of 21.8 km2/*** on the change of sediment discharge due to the major projects in the Changjiang River Basin,we divided the changing pattern of the coastline into three stages：the slow accretion stage（1974–1986）,the moderate accretion stage（1987–2002）,and the rapid accretion stage（2003–2014）.Liner regression analysis illustrated that there is a significantly positive correlation between the area changes and sediment discharge in the Chongming Eastern Shoal and *** suggested that sediment load has a fundamental effect on the evolution of the Changjiang *** of Deep Waterway in the North Passage of the Changjiang River（1998–2010） led to a rapid accretion in the Hengsha Eastern Shoal and Jiuduansha by influencing the hydrodynamics in North *** engineering such as reclamation and harbor construction can also change the morphology of the Changjiang *** defined a contribution rate of area change to assess the impact of reclamation on the evolution of Changjiang *** turned out that more than 45.3% of area increment of the Changjiang Estuary was attributed to reclamation.

关键词： remote sensing coastline change sediment load coastal engineering Changjiang(Yangtze River) Estuary

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三偏心蝶阀硬密封结构的响应面优化

液压与气动 2024年第7期48卷 120-128页

作者：王成龙徐东涛刘亚男黄凯先孟祥瑞辽宁科技大学机械工程与自动化学院辽宁鞍山114051 鞍钢集团矿业有限公司东鞍山烧结厂辽宁鞍山114041

金属硬密封三偏心蝶阀在关闭状态下的密封比压决定着该阀的密封性能和工作寿命,优化金属硬密封部件的结构参数十分重要。以DN600三偏心蝶阀为研究对象,利用有限元分析法,分析密封面上密封比压分布规律。提出利用密封配合面周向间隙指标... 详细信息

金属硬密封三偏心蝶阀在关闭状态下的密封比压决定着该阀的密封性能和工作寿命,优化金属硬密封部件的结构参数十分重要。以DN600三偏心蝶阀为研究对象,利用有限元分析法,分析密封面上密封比压分布规律。提出利用密封配合面周向间隙指标判断蝶阀的密封性能,利用Box-Behnken响应面优化方法对密封构件的结构进行优化,分析复合阀板座大、小径端切割厚度、复合阀板座直径及其交互作用对密封面最大密封比压的影响,得出最优设计方案。结果表明,在不影响蝶阀密封的前提下,优化复合阀板座参数后,密封面最大密封比压从202.96 MPa下降到128.44 MPa。对优化后蝶阀进行封闭打压密封实验,验证了其密封性能的可靠性。

关键词：三偏心蝶阀金属硬密封密封比压响应面优化密封试验

Latest Zircon U-Pb Geochronology of the Huoshiling Formation Volcanic Rocks in the Southeastern Margin of the Songliao Basin

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Acta Geologica Sinica(English Edition) 2017年第5期91卷 1924-1925页

作者： wang chenglong ZHANG Meisheng SUN Kai wang Yini LI Xiaobo LIU Xuesong College of Earth Sciences Jilin University Changchun 130061 Jilin China Exploration and Development Research Institute of Jilin Oilfield Company Songyuan 138000 Jilin China

Objective The Huoshiling Formation is the earliest volcanic stratum in the Songliao Basin,composed mainly of intermediate-basic volcanic rocks,with rare *** geological age of this formation has been controversial for ... 详细信息

关键词： Pb Latest Zircon U-Pb Geochronology of the Huoshiling Formation Volcanic Rocks in the Southeastern Margin of the Songliao Basin

Super-resolution imaging via sparsity constraint and sparse speckle illumination

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Chinese Physics B 2018年第7期27卷 325-330页

作者： Pengwei wang Wei Li chenglong wang Zunwang Bo Wenlin Gong Key Laboratory for Quantum Optics and Center for Cold Atom Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China University of Chinese Academy of Sciences Beijing 100049 China Academy of Opto-electronics Chinese Academy of Sciences Beijing 100094 China

We present an imaging approach via sparsity constraint and sparse speckle illumination which can dramatically en- hance the optical system＇s imaging resolution. When the object is illuminated by some sparse speckles and the sparse reconstruction algorithm is utilized to restore the blur image, numerical simulated results demonstrate that the image, whose resolution exceeds the Rayleigh limit, can be stably reconstructed even if the detection signal-to-noise ratio （SNR） is less than 10 dB. Factors affecting the quality of the reconstructed image, such as the coded pattern＇s sparsity and the detection SNR, are also studied,

关键词： imaging and optical processing

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儿童睡眠的调节机制研究进展

国际儿科学杂志 2024年第4期51卷 260-264页

作者：贾富华武书丽王成龙内蒙古自治区人民医院儿科呼和浩特010017

儿童睡眠健康贯穿儿童的生长发育全程,具有重要意义。睡眠障碍是影响儿童生长发育及成长健康的重要问题之一。存在睡眠障碍的儿童患病人数呈逐年上升趋势。目前研究表明儿童睡眠稳态受到干扰时通常伴随着神经内分泌系统活动的增加、免... 详细信息

儿童睡眠健康贯穿儿童的生长发育全程,具有重要意义。睡眠障碍是影响儿童生长发育及成长健康的重要问题之一。存在睡眠障碍的儿童患病人数呈逐年上升趋势。目前研究表明儿童睡眠稳态受到干扰时通常伴随着神经内分泌系统活动的增加、免疫系统的激活、代谢紊乱等,导致相应激素(如皮质醇)、炎症细胞因子、代谢物质等稳态发生变化,相互影响,形成恶性循环。此外,遗传因素与睡眠的关系也越来越受关注。该文综述儿童睡眠健康和睡眠障碍机制、影响因素及研究进展,为临床干预儿童睡眠问题提供参考依据。

关键词：儿童睡眠障碍危险因素机制

Dynamic simulation of a space gas-cooled reactor power system with a closed Brayton cycle

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Frontiers in Energy 2021年第4期15卷 916-929页

作者： chenglong wang Ran ZHANG Kailun GUO Dalin ZHANG Wenxi TIAN Suizheng QIU Guanghui SU Department of Nuclear Science and Technology State Key Laboratory of Multiphase Flow in Power EngineeringShaanxi Key Laboratory of Advanced Nuclear Energy and TechnologyXi’an Jiaotong UniversityXi’an 710049China

Space nuclear reactor power(SNRP)using a gas-cooled reactor(GCR)and a closed Brayton cycle(CBC)is the ideal choice for future high-power space *** investigate the safety characteristics and develop the control strategies for gas-cooled SNRP,transient models for GCR,energy conversion unit,pipes,heat exchangers,pump and heat pipe radiator are established and a system analysis code is developed in this ***,analyses of several operation conditions are performed using this *** full-power steady-state operation,the core hot spot of 1293 K occurs near the upper part of the *** 0.4$reactivity is introduced into the core,the maximum temperature that the fuel can reach is 2059 K,which is 914 K lower than the fuel melting *** system finally has the ability to achieve a new steady-state with a higher reactor *** the GCR is shut down in an emergency,the residual heat of the reactor can be removed through the conduction of the core and radiation heat *** results indicate that the designed GCR is inherently safe owing to its negative reactivity feedback and passive decay heat *** paper may provide valuable references for safety design and analysis of the gas-cooled SNRP coupled with CBC.

关键词： gas-cooled space nuclear reactor power closed Brayton cycle system startup and shutdown positive reactivity insertion accident