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铁路罐车清洗设施设计及污染治理研究

铁道建筑技术 2024年第8期 63-65,114页

作者：李哲豪中铁第一勘察设计院集团有限公司陕西西安710043

随着我国经济社会发展全面绿色转型,铁路罐车清洗作业也逐渐向自动化、环保化方向发展。在某洗罐所设计过程中,结合洗罐作业污染物产生情况,对废水处理回用、废气吸附排放、固废收集处理等设施进行针对性设计,使处理后的废水水质满足洗... 详细信息

随着我国经济社会发展全面绿色转型,铁路罐车清洗作业也逐渐向自动化、环保化方向发展。在某洗罐所设计过程中,结合洗罐作业污染物产生情况,对废水处理回用、废气吸附排放、固废收集处理等设施进行针对性设计,使处理后的废水水质满足洗罐工艺二次回用和直排市政管网要求,处理后的废气排放浓度及排放速率满足大气污染物有组织排放要求,固体废物收集处理设施满足相关规定要求。设计在提升生产作业效率的同时,系统解决了洗罐作业污染物不达标排放问题。

关键词：洗罐所罐车清洗设施污染治理三废排放

Ni/MgO catalyst prepared via dielectric-barrier discharge plasma with improved catalytic performance for carbon dioxide reforming of methane

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Frontiers of Chemical Science and Engineering 2014年第2期8卷 133-140页

作者： Yan li zhehao WEI Yong WANG Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman WA 99164 USA

A Ni/MgO catalyst was prepared via novel dielectric-barrier discharge （DBD） plasma decomposition method. The combined characterization of Bmnauer- Emmett-Teller measurement, X-ray diffraction, hydrogen temperature-programmed reduction and transmission electron microscopy shows that DBD plasma treatment enhances the support-metal interaction of Ni/MgO catalyst and facilitates the formation of smaller Ni particles. Sphere-like Ni particles form on plasma treated Ni/MgO catalysts. The plasma treated Ni/MgO catalyst shows a significantly improved low temperature activity and good stability for CO2 reforming of methane to syngas.

关键词： CO2 reforming methane dielectric-barrierdischarge (DBD) plasma Ni/MgO

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微波合成纳米氧化镁实验教学的条件探究

实验科学与技术 2024年第2期22卷 81-86,107页

作者：房川琳李哲皓李静刘艳红四川大学化学学院成都610064 四川大学匹兹堡学院成都610064

将学科前沿、科研成果融入实验教学,充实更新现有的教学内容,对缩小教学与科研距离,提高学生创新能力和培养学生综合素质起着非常重要的作用。项目通过科教融合,设计了一个研究型综合化学实验项目——纳米氧化镁的合成及表征。项目设计... 详细信息

将学科前沿、科研成果融入实验教学,充实更新现有的教学内容,对缩小教学与科研距离,提高学生创新能力和培养学生综合素质起着非常重要的作用。项目通过科教融合,设计了一个研究型综合化学实验项目——纳米氧化镁的合成及表征。项目设计过程中引入多功能微波合成仪,通过用X射线衍射、透射电子显微镜等表征技术从反应时长、反应物比例等多方面对反应条件进行探究,优化出了适合于本科实验课堂教学的反应方案。项目涉及多学科相关知识点,训练了学生综合运用多学科知识分析和解决问题的能力,并使他们的创新思维能力和综合素质得以提升。

关键词：科教融合微波合成纳米氧化镁粒径表径

A biological fluid fiber Sagnac sensor based on SPF-PCF-SPF structure

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Optoelectronics Letters 2023年第4期19卷 210-214页

作者： GUO Junqi WANG Changle DI Ke li zhehao li Renpu liU Yu Chongqing Key Laboratory of Autonomous Navigation and Microsystem Chongqing University of Post and TelecommunicationsChongqing 400065China Chongqing Engineering Research Center of Intelligent Sensing Technology and Microsystem Chongqing University of Posts and TelecommunicationsChongqing 400065China

A biological solution concentration sensor based on a side-polished fiber(SPF)assisted fluid system is *** birefringence properties of the asymmetrically filled fluid in this structure and the relationship between the concentration of the biological solution and the refractive index are theoretically *** was found that the interference peaks had red-shifted with increasing concentration.A sensing sensitivity of 1.3871×10^(4)nm·mL/mol at 14.68×10^(-4)mol/mL was achieved within the experimental range after different concentrations of arginine solutions were injected into the sensing *** sensing system can also be applied to measure the concentration of other biological solutions,providing the feasibility of real-time detection of biological solutions.

关键词： fiber fluid structure

Causal temporal graph attention network for fault diagnosis of chemical processes

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Chinese Journal of Chemical Engineering 2024年第6期70卷 20-32页

作者： Jiaojiao Luo zhehao Jin Heping Jin Qian li Xu Ji Yiyang Dai School of Chemical Engineering Sichuan UniversityChengdu 610065China China Three Gorges Corporation Beijing 100038China

Fault detection and diagnosis(FDD)plays a significant role in ensuring the safety and stability of chemical *** the development of artificial intelligence(AI)and big data technologies,data-driven approaches with excellent performance are widely used for FDD in chemical ***,improved predictive accuracy has often been achieved through increased model complexity,which turns models into black-box methods and causes uncertainty regarding their *** this study,a causal temporal graph attention network(CTGAN)is proposed for fault diagnosis of chemical processes.A chemical causal graph is built by causal inference to represent the propagation path of *** attention mechanism and chemical causal graph were combined to help us notice the key variables relating to fault *** in the Tennessee Eastman(TE)process and the green ammonia(GA)process showed that CTGAN achieved high performance and good explainability.

关键词： Chemical processes Safety Fault diagnosis Causal discovery Attention mechanism Explainability

Assessment of river basin habitat quality and its relationship with disturbance factors: A case study of the Tarim River Basin in Northwest China

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Journal of Arid Land 2022年第2期14卷 167-185页

作者： HE Bing CHANG Jianxia GUO Aijun WANG Yimin WANG Yan li zhehao State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China Xi'an University of TechnologyXi'an 710048China

The status of regional biodiversity is determined by habitat *** effective assessment of habitat quality can help balance the relationship between economic development and biodiversity ***,this study used the InVEST model to conduct a dynamic evaluation of the spatial and temporal changes in habitat quality of the Tarim River Basin in southern Xinjiang Uygur Autonomous Region of China by calc ulating the degradation degree levels for habitat types that were caused by threat factors from 1990 to 2018(represented by four periods of 1990,2000,2010 and 2018).Specifically,we used spatial autocorrelation analysis and Getis-Ord Gi*analysis to divide the study area into three heterogeneous units in terms of habitat quality:cold spot areas,hot spot areas and random *** index,population density,gross domestic product(GDP),altitude and distance from water source(DWS)were then chosen as the main disturbance *** correlation and spatial regression models were subsequently used to analyze the influences of disturbance factors on habitat *** results demonstrated that the overall level of habitat quality in the TRB was poor,showing a continuous degradation *** intensity of the negative correlation between habitat quality and Hemeroby index was proven to be strongest in cold spot areas,hot spot areas and random *** spatial lag model(SLM)was better suited to spatial regression analysis due to the spatial dependence of habitat quality and disturbance factors in heterogeneous *** analyzing the model,Hemeroby index was found to have the greatest impact on habitat quality in the studied four periods(1990,2000,2010 and2018).The research results have potential guiding significance for the formulation of reasonable management policies in the TRB as well as other river basins in arid areas.

关键词： habitat quality biodiversity InVEST model spatial heterogeneity spatial lag model human activities Tarim River Basin

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用于平板结构的动力吸振器参数优化设计

噪声与振动控制 2023年第1期43卷 244-250页

作者：李哲豪郑辉中铁第一勘察设计院集团有限公司西安710043

多重动力吸振器用于连续体主振系统减振时,其参数需要经过优化设计才能获得最优的减振效果,目前,参数优化设计方法还有待完善。研究平板结构动力吸振器减振参数优化设计方法,将平板-多重动力吸振器系统运动方程化简,推导得到优化的目标... 详细信息

多重动力吸振器用于连续体主振系统减振时,其参数需要经过优化设计才能获得最优的减振效果,目前,参数优化设计方法还有待完善。研究平板结构动力吸振器减振参数优化设计方法,将平板-多重动力吸振器系统运动方程化简,推导得到优化的目标函数——动力放大系数函数,采用一种基于偏导数的优化方法得到多重动力吸振器的最优设计参数。通过数值计算和仿真分析验证所设计吸振器的有效性。结果表明,吸振器对平板振动有明显抑制效果,且在振子总质量比相等的条件下,振子数越多,吸振器的减振效果越好,减振频带越宽。

关键词：振动与波减振动力吸振器动力放大系数优化设计

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用于列车地板结构减振的动力吸振器设计

噪声与振动控制 2023年第2期43卷 265-271页

作者：李哲豪郑辉中铁第一勘察设计院集团有限公司西安710043

动力吸振器作为一种振动控制的主要手段,很少被用于铁道车辆车体结构的振动控制。通过仿真分析发现车辆在33.6 Hz处存在地板局部振动放大现象。为解决该问题,建立地板-多重动力吸振器系统运动方程,推导得到动力放大系数函数,并提出一种... 详细信息

动力吸振器作为一种振动控制的主要手段,很少被用于铁道车辆车体结构的振动控制。通过仿真分析发现车辆在33.6 Hz处存在地板局部振动放大现象。为解决该问题,建立地板-多重动力吸振器系统运动方程,推导得到动力放大系数函数,并提出一种基于偏导数的数值搜索方法,计算多重动力吸振器的最优参数。利用仿真方法提取地板目标模态的振型函数,并计算模态质量,最终得到地板最优多重动力吸振器参数。将动力吸振器建入车体仿真模型对其振动控制效果进行验证。结果表明,目标频率33.6 Hz处的地板振动加速度峰值下降23.98%,且33.6 Hz附近的振动传递率也有所下降,所设计的地板多重动力吸振器具有良好的减振效果。

关键词：振动与波地板振动控制多重动力吸振器动力放大系数

Intermittent fasting boosts antitumor immunity by restricting CD11b^(+)Ly6C^(low)Ly6G^(low) cell viability through glucose metabolism in murine breast tumor model

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Food Science and Human Wellness 2024年第4期13卷 2327-2345页

作者： Chenghao Fu zhehao liang Zemiao Niu Ning Chen Yuemin li Zhenhua liang Yanwei Huo Hao Xi Rong Wang Yonghuan Yan Xiaoruo Gan Mengtian Wang Yun Huang Yan Zhang Mingming Gao Pin Lü Postdoctoral Station for Basic Medicine Cardiovascular Medical Science CenterDepartment of Cell BiologyKey Laboratory of Neural and Vascular Biology of Ministry of EducationHebei Medical UniversityShijiazhuang 050017China Hebei Key Laboratory of Forensic Medicine College of Forensic MedicineHebei Medical UniversityShijiazhuang 050017China Hebei Food Safety Key Laboratory Hebei Food Inspection and Research InstituteShijiazhuang 050091China Laboratory of lipid Metabolism Department of Biochemistry and Molecular BiologyKey Laboratory of Medical Biotechnology of Hebei ProvinceShijiazhuang 050017China

Intermittent fasting can benefit breast cancer patients undergoing chemotherapy or ***,it is still uncertain how to select immunotherapy drugs to combine with intermittent *** we observed that two cycles of fasting treatment significantly inhibited breast tumor growth and lung tissue metastasis,as well as prolonged overall survival in mice bearing 4T1 and 4T07 breast *** this process,both the immunosuppressive monocytic-(M-)and granulocytic-(G-)myeloid-derived suppressor cell(MDSC)decreased,accompanied by an increase in interleukin(IL)7R^(+)and granzyme B^(+)T cells in the tumor ***,we observed that Ly6G^(low)G-MDSC sharply decreased after fasting treatment,and the cell surface markers and protein mass spectrometry data showed potential therapeutic *** investigation revealed that glucose metabolism restriction suppressed the splenic granulocytemonocyte progenitor and the generation of colony-stimulating factors and IL-6,which both contributed to the accumulation of *** the other hand,glucose metabolism restriction can directly induce the apoptosis of Ly6G^(low)G-MDSC,but not Ly6G^(high)*** summary,these results suggest that glucose metabolism restriction induced by fasting treatment attenuates the immune-suppressive milieu and enhances the activation of CD3^(+)T cells,providing potential solutions for enhancing immune-based cancer interventions.

关键词： Intermittent fasting Ly6G^(low)myeloid-derived suppressor cell apoptosis Extramedullary hematopoiesis Colony stimulating factor Glucose metabolism restriction