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Cost-optimal Calculation for Ice-Storage Systems Using Neural Network

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Journal of Thermal Science 2002年第2期11卷 138-143页

作者： Zhihua Hu huanqun qian Haipeng Zhang Fangde Zhou Xi An Jiao Tong Univ State Key Lab Multiphase Flow Power Engn Xian 710049 Shaanxi Peoples R China

Based on the eminent characteristics of the ice-storage systems, which can shift cooling electrical demand from peak time to off peak time, this paper describes the ice storage air-conditioning system that is now used much frequently. The authors develop the operating cost model by simplification and introduce a neural network model and try to solve the optimal cost problem of operation by using this neural network model. In calculation, any trajectory of the neural network converges to its solution in finite time, which is consistent with result by simplex method. Comparing with different methods, the neural network is more effective, which can be alternative to simplex method in calculating the optimal cost model for ice storage air-conditioning systems.

关键词： ice-storage linear programming neural network.

Fractal Characteristics of Oil-Gas-Water Multiphase Flow

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Journal of Thermal Science 2002年第1期11卷 49-52页

作者： huanqun qian Zhihua Hu Hedong Sun Fangde Zhou Xi An Jiao Tong Univ State Key Lab Multiphase Flow Power Engn Xian 710049 Shaanxi Peoples R China

Experiments were conducted with oil-gas-water multiphase flow in a horizontal pipe under different flow patterns. The fractal method was applied to analyze the pressure drop signals measured in the experiments. The fractal dimensions of the signals were calculated. Preliminary results indicated that the fractal dimensions were small and different under different flow patterns. The fractal dimensions could be used to identify the flow patterns of the oil-gas-water multiphase flows.

关键词： oil-gas/air-water correlation dimension fractals flow regime.

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天然气吸附床内传热特性分析

油气储运 2007年第9期26卷 1-3页

作者：钱焕群张建山东建筑大学胜利油田设计院

分析了天然气吸附床的传热过程,建立了简化的吸附床内传热模型,讨论了传热模型的分析解。认为所开展的分析工作可为深入研究天然气吸附储存技术提供一种方法和思路。

关键词：天然气吸附热吸附热效应传热特性分析

CO2、CH4在全硅MFI和MFI(2Na+)沸石吸附的分子模拟

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离子交换与吸附 2011年第6期27卷 546-554页

作者：钱焕群李保瑞张林华可再生能源建筑利用技术省部共建教育部重点实验室山东省建筑节能技术重点实验室山东建筑大学热能工程学院

采用巨正则蒙特卡洛(GCMC)方法研究了CO2、CH4在全硅MFI沸石和MFI(2Na+)沸石中的吸附行为,计算获得了CO2、CH4在两种架构中的吸附等温线、吸附能量分布曲线和粒子云分布图,结果表明,CO2、CH4纯组分在较低压力下即有较高的吸附量,并且吸... 详细信息

采用巨正则蒙特卡洛(GCMC)方法研究了CO2、CH4在全硅MFI沸石和MFI(2Na+)沸石中的吸附行为,计算获得了CO2、CH4在两种架构中的吸附等温线、吸附能量分布曲线和粒子云分布图,结果表明,CO2、CH4纯组分在较低压力下即有较高的吸附量,并且吸附量随压力的升高而增加,随温度的升高而小幅减少,其混合组分在两架构中均发生明显的竞争吸附行为;Na+的存在可提高MFI型沸石对CO2的吸附能力并改善其选择性。

关键词： CO2 全硅MFI沸石 MFI(2Na+)沸石吸附蒙特卡洛

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冷却塔冷却过程模拟计算

暖通空调 1999年第1期29卷 59-61页

作者：钱焕群郭怀德金安淮阴工业专科学校淮阴工业贸易学校华北电力科学院

分析了冷却塔的传热传质过程，考虑了冷却塔蒸发水带走的热量，推导出该过程的数学模型。认为利用该模型计算简单、省时。计算结果与经典的Ｓｕｔｈｅｒｌａｎｄ数值比较，误差为５％。

关键词：冷却塔模型传热传质水损失

CO_2,CH_4在全硅MFI型沸石中吸附的分子模拟

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化学工业与工程技术 2011年第3期32卷 8-10页

作者：李保瑞钱焕群山东省建筑节能技术重点实验室山东济南250101

采用巨正则蒙特卡洛(GCMC)分子模拟方法研究了CO2,CH4分子在全硅MFI型沸石中的吸附行为,计算得到了纯组分和两组分的混合物在不同温度时的吸附等温线;分析了全硅MFI型沸石对混合组分的选择性吸附;模拟还得到了CO2,CH4分子在全硅MFI型沸... 详细信息

采用巨正则蒙特卡洛(GCMC)分子模拟方法研究了CO2,CH4分子在全硅MFI型沸石中的吸附行为,计算得到了纯组分和两组分的混合物在不同温度时的吸附等温线;分析了全硅MFI型沸石对混合组分的选择性吸附;模拟还得到了CO2,CH4分子在全硅MFI型沸石中的吸附位。

关键词： CO2 CH4全硅MFI沸石吸附分子模拟

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喷雾冷却液滴冲击壁面过程的数值模拟及分析

洁净与空调技术 2021年第1期 40-45页

作者：吕晨腾钱焕群王星陈山东建筑大学热能工程学院

以经典流体力学中的自由射流湍流理论和提出的描述喷雾流体的流动情况为基础,从理论分析和数值模拟两个方面,研究了喷雾冷却的过程,并分别进行了液滴冲击物理模型和喷嘴射流模型的模拟,对高温壁面以及空气的降温有着非常重要的意义,以... 详细信息

以经典流体力学中的自由射流湍流理论和提出的描述喷雾流体的流动情况为基础,从理论分析和数值模拟两个方面,研究了喷雾冷却的过程,并分别进行了液滴冲击物理模型和喷嘴射流模型的模拟,对高温壁面以及空气的降温有着非常重要的意义,以达到强化传热的目的。

关键词：自由射流喷雾冷却液滴冲击喷嘴射流

Interannual variability of boreal summer intraseasonal oscillation over the northwestern Pacific influenced by the Pacific Meridional Mode

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 6-11页

作者： Haoyu Zhou Pang-Chi Hsu Lin Chen Yitian qian Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environmental Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjingChina

During the boreal summer,intraseasonal oscillations exhibit significant interannual variations in intensity over two key regions:the central-western equatorial Pacific(5°S-5°N,150°E-150°W)and the subtropical Northwestern Pacific(10°-20°N,130°E-175°W).The former is well-documented and considered to be influenced by the ENSO,while the latter has received comparatively less attention and is likely influenced by the Pacific Meridional Mode(PMM),as suggested by partial correlation analysis *** elucidate the physical processes responsible for the enhanced(weakened)intraseasonal convection over the subtropical northwestern Pacific during warm(cold)PMM years,the authors employed a moisture budget *** findings reveal that during warm PMM years,there is an increase in summer-mean moisture over the subtropical northwestern *** increase interacts with intensified vertical motion perturbations in the region,leading to greater vertical moisture advection in the lower troposphere and consequently resulting in convective *** a process is pivotal in amplifying intraseasonal convection *** observational findings were further verified by model experiments forced by PMM-like sea surface temperature patterns.

关键词： Boreal summer intraseasonal oscillation Interannual variability Pacific Meridional Mode Moisture budget analysis

Recent advances in exploring new blood-based biomarkers for the early diagnosis of gastric cancer

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Science China Chemistry 2025年第1期 35-45页

作者： Xinyu Peng qian Ma Da Han School of Life Science Shanghai University Institute of Molecular Medicine Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine State Key Laboratory of Oncogenes and Related Genes Renji Hospital School of Medicine Shanghai Jiao Tong University Department of Research and Development Intellinosis Biotechnologies Co.Ltd.

Gastric cancer(GC) is a prevalent and lethal malignancy worldwide, and the 5-year survival rate is less than 30%. The absence of distinctive symptoms often leads to late-stage diagnosis, contributing to a grim prognosis. Early detection is pivotal for improving the survival rates and outcomes of GC patients. Traditional diagnostic methods, including gastroscopy and histopathological examination, are restricted in the early diagnosis of GC. Conventional protein biomarkers, such as carcinoembryonic antigen(CEA), carbohydrate antigen 19-9(CA19-9), and carbohydrate antigen 72-4(CA72-4), exhibit insufficient sensitivity and specificity for GC screening, which diminishes their clinical value. Recently, novel circulating biomarkers, such as circulating tumor cells(CTCs), circulating tumor cell DNA(ct DNA), and circulating free RNA(cf RNA), have emerged as promising candidates in the burgeoning field of liquid biopsy due to their superior sensitivity and specificity. This review focuses on the latest research on blood-based biomarkers for GC diagnosis and examines the clinical potentials and challenges associated with these emerging biomarkers.

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