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国内VOCs来源、排放标准及脱除技术分析

工程热物理学报 2024年第6期45卷 1825-1837页

作者：于丹田振玉杜利军邝九杰陈劲涛苏冠宇中国科学院工程热物理研究所北京100190 中国科学院大学北京100049 华北电力大学能源动力与机械工程学院北京102206 中国科学院工程热物理研究所煤转化国家重点实验室北京100190

作为一种典型的大气污染物,VOCs对大气环境及人体健康危害极大。VOCs的高效清洁脱除是我国生态环境保护的重大需求,也是国家十四五规划的重要内容。本文基于我国经济发展的现状,总结了国内VOCs的来源特征,国家、地方及行业的排放标准,... 详细信息

作为一种典型的大气污染物,VOCs对大气环境及人体健康危害极大。VOCs的高效清洁脱除是我国生态环境保护的重大需求,也是国家十四五规划的重要内容。本文基于我国经济发展的现状,总结了国内VOCs的来源特征,国家、地方及行业的排放标准,分析了回收法和销毁法两大类VOCs脱除技术的发展现状,提出了多方法结合的技术特征,并预测了未来VOCs脱除技术的优势发展方向。

关键词： VOCs 来源排放标准脱除技术催化氧化

一种改进的GM-C-CPHD空间多目标跟踪算法

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上海航天（中英文） 2024年第1期41卷 89-96页

作者：谢贝旭张艳陈金涛张任莉中山大学航空航天学院广东深圳518060

随着空间目标的数目急剧上升,提高空间多目标跟踪精度成为必然要求,但空间多目标跟踪存在轨道动力学模型不完善的问题。针对该问题,提出一种改进的高斯混合势概率假设密度滤波(GM-C-CPHD)算法。通过在轨道动力学模型中考虑一个不确定性... 详细信息

随着空间目标的数目急剧上升,提高空间多目标跟踪精度成为必然要求,但空间多目标跟踪存在轨道动力学模型不完善的问题。针对该问题,提出一种改进的高斯混合势概率假设密度滤波(GM-C-CPHD)算法。通过在轨道动力学模型中考虑一个不确定性模型参数,即面质比参数(AMR),基于协方差传递面质比参数对位置、速度状态估计的影响,提高空间目标跟踪精度。仿真分析表明:相对于GM-CPHD滤波器,目标数量的跟踪和状态估计性能均有所提高,具有良好的应用前景。

关键词：空间多目标跟踪高斯混合势概率假设密度滤波不确定性参数面质比(AMR)

Investigation of the Laminar Premixed n-Propylamine Flame

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Journal of Thermal Science 2022年第3期31卷 854-866页

作者： LI Wang chen jintao YANG Jiuzhong TIAN Zhenyu Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China National Synchrotron Radiation Laboratory University of Science and TechnologyHefei230029China

The laminar premixed n-propylamine(NPA)flame with equivalence ratio of 1.70 has been investigated at 4666.28 Pa using tunable synchrotron photoionization and molecular-beam mass spectrometry *** structures and mole fractions of 40 species were ***,allylamine,butadiyne,vinylacetylene,1,3-butadiene,1-butene,2-butene,n-butyl radical,1,3-cyclopentadiene,cyclopentene,2-pentene,benzene,toluene,ethylbenzene,2-propen-1-imine,cyclopropanimine,pyrrole,2-butenenitrile and n-butylamine were newly identified in the amine *** fraction profiles of some species including reactants,intermediates and products in the NPA flame were *** and N_(2)were observed as the primary N-containing products in the NPA flame,which was different from the result that NO was the major N-containing products in previous studies of nitrogen *** bond energies of NPA were calculated through quantum chemistry calculations on the basis of density functional theory at the CBS-QB3 *** showed that the CH_(3)CH_(2)-CH_(2)NH_(2)bond was the weakest and NPA mainly decomposed to CH_(2)NH_(2)and C_(2)H_(5)*** H-abstractions at C_(α)by OH/O(NPA+OH=CH_(3)CH_(2)CHNH_(2)+H_(2)O and NPA+O=CH_(3)CH_(2)CHNH_(2)+OH)had significant promoting effects on NPA *** N conversion chain of NPA under flame conditions was proposed and detailed analysis with respect to intermediates especially the nitrogen-containing species were *** results will enrich the understanding of NPA flame and are essential to further establish the kinetic mechanism.

关键词： n-propylamine low-pressure laminar premixed flame intermediates mole fraction quantum chemistry calculation molecular beam mass spectrometry

Collaborative slot secondary allocation based on flight wave operation

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International Journal of Intelligent Computing and Cybernetics 2023年第2期16卷 364-395页

作者： Kejia chen jintao chen Lixi Yang Xiaoqian Yang School of Economics and Management Fuzhou UniversityFuzhouChina

Purpose-Flights are often delayed owing to *** paper proposes a cooperative slot secondary assignment(CSSA)model based on a collaborative decision-making(CDM)mechanism,and the operation mode of flight waves designs an improved intelligent algorithm to solve the optimal flight plan and minimize the total delay of passenger ***/methodology/approach-Taking passenger delays,transfer delays and flight cancellation delays into account comprehensively,the total delay time is minimized as the objective *** model is verified by a linear solver and compared with the first come first service(FCFS)method to prove the effectiveness of the *** improved adaptive partheno-genetic algorithm(IAPGA)using hierarchical serial number coding was designed,combining elite and roulette strategies to find pareto ***-Comparing and analyzing the experimental results of various scale examples,the optimization model in this paper is greatly optimized compared to the FCFS method in terms of total delay time,and the IAPGA algorithm is better than the algorithm before in terms of solution performance and solution set ***/value-Based on the actual situation,this paper considers the operation mode of flight *** addition,the flight plan solved by the model can be guaranteed in terms of feasibility and effectiveness,which can provide airlines with reasonable decision-making opinions when reassigning slot resources.

关键词： Flight delay Collaborative decision-making Slot secondary assignment Flight wave Improved adaptive partheno-genetic algorithm

单耐利福平与耐多药结核病患者178例临床特征

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现代疾病预防控制 2024年第5期35卷 364-366,393页

作者：陈金涛庄严杨改平孟丹安阳市结核病防治所河南安阳455000 河南省疾病预防控制中心

目的分析单耐利福平肺结核患者与耐多药肺结核患者临床特征,为制定耐药结核病的防控措施及治疗方案提供依据。方法收集2018—2022年就诊于河南省安阳市结核病防治所病原学阳性的肺结核病患者,比较单耐利福平与耐多药肺结核患者基本信息... 详细信息

目的分析单耐利福平肺结核患者与耐多药肺结核患者临床特征,为制定耐药结核病的防控措施及治疗方案提供依据。方法收集2018—2022年就诊于河南省安阳市结核病防治所病原学阳性的肺结核病患者,比较单耐利福平与耐多药肺结核患者基本信息、实验室和影像学检查指标。结果单耐利福平与耐多药结核病患者178例,总耐药率10.21%,其中,单耐利福平64例,耐药率3.67%,耐多药114例,耐药率6.54%。2018—2022年单耐利福平和耐多药患者总耐药率呈下降趋势(χ^(2)_(趋势)=6.220,P<0.05)。既往是否中断治疗间比较,耐多药组治疗中断率65.79%高于单耐利福平组43.75%(χ^(2)=8.166,P<0.05);白细胞计数比较,耐多药组(9.39±2.88)×10^(9)/L高于单耐利福平组(8.03±2.62)×10^(9)/L(t=2.198,P<0.05);胸部CT评分比较,耐多药组(13.50±2.13)高于单耐利福平组(11.83±3.24)(t=0.560,P<0.05)。结论安阳市耐药肺结核总体呈现下降趋势,耐多药肺结核患者胸部影像学表现更严重,应加强耐药结核病患者的规范管理和治疗。

关键词：单耐利福平耐多药肺结核临床特征

非等温回归再时效工艺对7055铝合金组织与性能的影响

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有色金属加工 2024年第2期53卷 10-14页

作者：张缓陈忠家陈锦涛魏心航合肥工业大学材料科学与工程学院安徽合肥230009

文章以7055铝合金为研究对象,通过TEM、力学性能测试、耐腐蚀性能测试等实验手段,探究非等温回归过程中升温速率对合金组织与性能的影响规律,回归升温速率设为40℃/h、60℃/h、600℃/h,升温截止温度为180℃。结果表明,当非等温回归再时... 详细信息

文章以7055铝合金为研究对象,通过TEM、力学性能测试、耐腐蚀性能测试等实验手段,探究非等温回归过程中升温速率对合金组织与性能的影响规律,回归升温速率设为40℃/h、60℃/h、600℃/h,升温截止温度为180℃。结果表明,当非等温回归再时效工艺为(120℃×24 h)+(60℃/h→180℃)+(120℃×24 h)时,7055铝合金获得了高于T6态的强度,抗拉强度680 MPa,屈服强度641 MPa,延伸率14%。60℃/h升温速率下回归再时效后,晶内析出相细小弥散分布,晶界析出相断续排列,晶界无沉淀析出带(PFZ)明显,剥落腐蚀性能评级为EA,耐腐蚀性能优异。

关键词： 7055铝合金非等温回归再时效工艺升温速率力学性能耐腐蚀性能

点环激光超窄间隙焊与电弧焊高强钢厚板组织性能对比研究

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热加工工艺 2024年第5期53卷 39-47,54页

作者：陈锦涛胡祺兰玲徐沛至聂璞林李铸国孙军浩上海交通大学上海市激光制造与材料改性重点实验室上海200240 中国船舶集团有限公司第十一研究所上海200032

为消除激光超窄间隙焊易产生的侧壁熔合缺陷,开发了点环激光填丝焊工艺,利用中心点激光对焊丝加热,利用环激光对窄间隙坡口加热,完成30 mm厚10CrNi3MoV低合金高强钢的焊接,并与传统电弧焊接头开展组织和性能对比分析。结果表明,激光超... 详细信息

为消除激光超窄间隙焊易产生的侧壁熔合缺陷,开发了点环激光填丝焊工艺,利用中心点激光对焊丝加热,利用环激光对窄间隙坡口加热,完成30 mm厚10CrNi3MoV低合金高强钢的焊接,并与传统电弧焊接头开展组织和性能对比分析。结果表明,激光超窄间隙填丝焊接头焊缝区由针状铁素体、粒状贝氏体与少量的马氏体组成,电弧焊接头由针状铁素体和粒状贝氏体组成。激光焊的快速冷却特点使其焊缝组织较弧焊更加细小。激光焊接头热影响区由较多的铁素体和粒状贝氏体组织和较少的M-A组元组成,有利于接头性能的提高。激光超窄间隙填丝焊接头抗拉强度与电弧焊接头近似相当,但激光超窄间隙填丝焊接头具有更好的冲击韧性。

关键词：激光超窄间隙焊电弧焊低合金高强钢厚板

Low-temperature chemistry in plasma-driven ammonia oxidative pyrolysis

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Green Energy & Environment 2024年第9期9卷 1477-1488页

作者： Mingming Zhang Qi chen Guangzhao Zhou jintao Sun He Lin School of Mechanical Electronic and Control Engineering Beijing Jiaotong University School of Mechanical Engineering Shanghai Jiao Tong University

Ammonia is gaining increasing attention as a green alternative fuel for achieving large-scale carbon emission reduction. Despite its potential technical prospects, the harsh ignition conditions and slow flame propagation speed of ammonia pose significant challenges to its application in engines. Non-equilibrium plasma has been identified as a promising method, but current research on plasma-enhanced ammonia combustion is limited and primarily focuses on ignition characteristics revealed by kinetic models. In this study, low-temperature and low-pressure chemistry in plasma-assisted ammonia oxidative pyrolysis is investigated by integrated studies of steady-state GC measurements and mathematical simulation. The detailed kinetic mechanism of NH3decomposition in plasma-driven Ar/NH3and Ar/NH3/O2mixtures has been developed. The numerical model has good agreements with the experimental measurements in NH3/O2consumption and N2/H2generation, which demonstrates the rationality of modelling. Based on the modelling results, species density profiles, path flux and sensitivity analysis for the key plasmaproduced species such as NH2, NH, H2, OH, H, O, O（1D）, O2（a1△g）, O2（b1∑g+）, Ar*, H-, Ar+, NH3+, O2-in the discharge and afterglow are analyzed in detail to illustrate the effectiveness of the active species on NH3excitation and decomposition at low temperature and relatively higher E/N values. The results revealed that NH2, NH, H as well as H2are primarily generated through the electron collision reactions e + NH3→ e + NH2+ H, e + NH3→ e + NH + H2and the excited-argon collision reaction Ar*+ NH3+ H → Ar + NH2+ 2H, which will then react with highly reactive oxidative species such as O2*, O*, O, OH, and O2to produce stable products of NOx and H2O. NH3→ NH is found a specific pathway for NH3consumption with plasma assistance, which further highlights the enhanced kinetic effects.

关键词： Non-equilibrium plasma Ammonia fuel Oxidative pyrolysis Pathway flux analysis Sensitivity analysis

桑麻杏贝汤对慢性阻塞性肺疾病急性加重期痰热壅肺证患者气道炎症及重塑功能的影响

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中医药通报 2024年第3期23卷 41-44页

作者：陈金涛曹强杨玲许玲季思勤王振伟上海中医药大学附属岳阳中西医结合医院呼吸内科上海200080 同济大学附属第四人民医院老年科上海200080

目的:观察桑麻杏贝汤治疗慢性阻塞性肺疾病急性加重期痰热壅肺证患者的作用机制及其应用价值。方法:将慢性阻塞性肺疾病急性加重期痰热壅肺证患者随机分为桑麻组和对照组,两组均予常规西医治疗,桑麻组在此基础上加用桑麻杏汤治疗,共治疗... 详细信息

目的:观察桑麻杏贝汤治疗慢性阻塞性肺疾病急性加重期痰热壅肺证患者的作用机制及其应用价值。方法:将慢性阻塞性肺疾病急性加重期痰热壅肺证患者随机分为桑麻组和对照组,两组均予常规西医治疗,桑麻组在此基础上加用桑麻杏汤治疗,共治疗7d,并观察治疗前后患者血清TGF-β1、M2受体、FeNO水平及肺功能的变化情况。结果:(1)治疗后,两组患者血清TGF-β1、M2受体水平、FeNO水平均较治疗前明显降低(P<0.05),且桑麻组对血清TGF-β1、M2受体水平、FeNO水平的改善作用优于对照组(P<0.05)。(2)治疗后,两组患者的FEV1%、FEV1/FVC、FVC水平均较治疗前升高(P<0.05),且桑麻组对FEV1%的改善作用优于对照组(P<0.05)。结论:桑麻杏贝汤能够有效减轻慢性阻塞性肺疾病急性加重期患者的炎症反应,抑制成纤维化,缓解气道重塑,提高肺功能,控制病情,改善预后。

关键词：桑麻杏贝汤慢性阻塞性肺疾病急性加重期 TGF-β1 M2受体 FeNO 肺功能