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Journal of Environmental Sciences 2022年第11期34卷 25-37页

作者： Deji Jing nana cheng cheng Zhang Ziwei Chen Xingnong Cai Sujing Li Jingkai Zhao Qiaoli Wang Wei Li Key Laboratory of Biomass Chemical Engineering of the Ministry of Education Institute of Industrial Ecology and EnvironmentCollege of Chemical and Biological EngineeringZhejiang University(Yuquan Campus)Hangzhou 310027China College of Environment Zhejiang University of TechnologyHangzhou 310032China

Volatile organic compound(VOC) emission control and source apportionment in small-scale industrial areas have become key topics of air pollution control in China. This study proposed a novel characteristic factor and pattern recognition(CF-PR) model for VOC source apportionment based on the similarity of characteristic factors between sources and receptors.A simulation was carried out in a typical industrial area with the CF-PR model involving simulated receptor samples. Refined and accurate source profiles were constructed through in situ sampling and analysis, covering rubber, chemicals, coating, electronics, plastics, printing, incubation and medical treatment industries. Characteristic factors of n-undecane,styrene, o-xylene and propane were identified. The source apportionment simulation results indicated that the predicted contribution rate was basically consistent with the real contribution rate. Compared to traditional receptor models, this method achieves notable advantages in terms of refinement and timeliness at similar accuracy, which is more suitable for VOC source identification and apportionment in small-scale industrial areas.

关键词： VOC Source apportionment Characteristic factors Pattern recognition Industrial areas

IRE1α regulates the PTHrP-IHH feedback loop to orchestrate chondrocyte hypertrophy and cartilage mineralization

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Genes & Diseases 2024年第1期11卷 464-478页

作者： Mengtian Fan nana Geng Xingyue Li Danyang Yin Yuyou Yang Rong Jiang cheng Chen Naibo Feng Li Liang Xiaoli Li Fengtao Luo Huabing Qi Qiaoyan Tan Yangli Xie Fengjin Guo Laboratory of Developmental Biology Department of Cell Biology and GeneticsSchool of Basic Medical ScienceChongqing Medical UniversityChongqing 400016China Laboratory of Stem Cells and Tissue Engineering School of Basic Medical ScienceChongqing Medical UniversityChongqing 400016China Department of Orthopedics The 1st Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Wound Repair and Rehabilitation Medicine State Key Laboratory of TraumaBurns and Combined InjuryTrauma CenterResearch Institute of SurgeryDaping HospitalArmy Medical UniversityChongqing 400042China

Cartilage development is controlled by the highly synergistic proliferation and differentiation of growth plate chondrocytes,in which the Indian hedgehog(IHH)and parathyroid hormone-related protein-parathyroid hormone-1 receptor(PTHrP-PTH1R)feedback loop is crucial.The inositol-requiring enzyme 1a/X-box-binding protein-1 spliced(IRE1α/XBP1s)branch of the unfolded protein response(UPR)is essential for normal cartilage development.However,the precise role of ER stress effector IRE1α,encoded by endoplasmic reticulum to nucleus signaling 1(ERN1),in skeletal development remains unknown.Herein,we reported that loss of IRE1α accelerates chondrocyte hypertrophy and promotes endochondral bone growth.ERN1 acts as a negative regulator of chondrocyte proliferation and differentiation in postnatal growth plates.Its deficiency interrupted PTHrP/PTH1R and IHH homeostasis leading to impaired chondrocyte hypertrophy and differentiation.XBP1s,produced by p-IRE1α-mediated splicing,binds and up-regulates PTH1R and IHH,which coordinate cartilage development.Meanwhile,ER stress cannot be activated normally in ERN1-deficient chondrocytes.In conclusion,ERN1 deficiency accelerates chondrocyte hypertrophy and cartilage mineralization by impairing the homeostasis of the IHH and PTHrP/PTH1R feedback loop and ER stress.ERN1 may have a potential role as a new target for cartilage growth and maturation.

关键词： Cartilage development ER stress ERN1 IHH PTHrP/PTH1R

Research on the Application of Virtual Simulation Technology in the Safety Management of Coal Mining

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Journal of Electronic Research and Application 2024年第3期8卷 249-254页

作者： Siqi cheng Tianyi Jia nana Deng Xiaowen Ma Xinjiang Institute of Engineering Urumqi 830023China

Safety is paramount in coal mining as it affects efficiency.Thus,it is essential to enhance the management of coal mine safety.With the ongoing advancement of modern technologies,more innovative solutions are being integrated into the safety management of coal mining,including virtual simulation technology.This paper focuses on analyzing and researching the application of virtual simulation technology in the safety management of coal mining,providing insights for reference.

关键词： Virtual simulation technology Coal mine safety management Application

A supplementary assessment system of AQI-V for comprehensive management and control of air quality in chemical industrial parks

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Journal of Environmental Sciences 2023年第8期130卷 114-125页

作者： Qiaoli Wang Dongping Sheng chengzhi Wu Deji Jing nana cheng Xingnong Cai Sujing Li Jingkai Zhao Wei Li Jianmeng Chen College of Environment Zhejiang University of TechnologyHangzhou 310032China Key Laboratory of Biomass Chemical Engineering of the Ministry of Education Institute of Industrial Ecology and EnvironmentCollege of Chemical and Biological EngineeringZhejiang University(Yuquan Campus)Hangzhou 310027China Trinity Consultants Inc.(China office)Hangzhou 310012China Zhejiang Ocean University ZhoushanZhejiang Province 316022China

Volatile organic compounds(VOCs)are the dominant pollutants in industrial parks.However,they are not generally considered as part of the air quality index(AQI)system,which leads to a biased assessment of pollution in industrial parks.In this study,a supplementary assessment system of AQI-V was established by analyzing VOCs characteristics with vehicle-mounted PTR-TOFMS instrument,correlation analysis and the standards analysis.Three hourly and daily scenarios were considered,and the hierarchical parameter setting was further optimized by field application.The hourly and daily assessments revealed the evaluation factors for the discriminability of different air quality levels,practiced value for regional air quality improvement,and the reservation of general dominant pollutants.Finally,the universality testing in ZPIP successfully recognized most of the peaks,with 54.76%,38.39%and 6.85%for O_(3),VOCs and NO_(2) as the dominant pollutant,and reflected the daily ambient air quality condition,togetherwith the dominant pollutant.The AQI-V systemwith VOCs sub-index is essential for air quality evaluation in industrial parks,which can further provide scientific support to control the pollution of VOCs and the secondary pollutant,therefore significantly improve the air quality in local industrial parks.

关键词： Air quality index Industrial parks,VOCs sub-index AQI-V system Scenario analysis

An integrated chemical mass balance and source emission inventory model for the source apportionment of PM2.5 in typical coastal areas

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Journal of Environmental Sciences 2020年第6期32卷 118-128页

作者： nana cheng cheng Zhang Deji Jing Wei Li Tianjiao Guo Qiaoli Wang Sujing Li Key Laboratory of Biomass Chemical Engineering of the Ministry of Education Institute of Industrial Ecology and EnvironmentCollege of Chemical and Biological EngineeringZhejiang University(Yuquan Campus)Hangzhou310027China

The source apportionment of PM2.5 is essential for pollution prevention.In view of the weaknesses of individual models,we proposed an integrated chemical mass balancesource emission inventory(CMB-SEI)model to acquire more accurate results.First,the SEI of secondary component precursors(SO2,NOx,NH3,and VOCs)was compiled to acquire the emission ratios of these sources for the precursors.Then,a regular CMB simulation was executed to obtain the contributions of primary particle sources and secondary components(SO4^2-,NO3^-3,NH4^+,and SOC).Afterwards,the contributions of secondary components were apportioned into primary sources according to the source emission ratios.The final source apportionment results combined the contributions of primary sources by CMB and SEI.This integrated approach was carried out via a case study of three coastal cities(Zhoushan,Taizhou,and Wenzhou;abbreviated WZ,TZ,and ZS)in Zhejiang Province,China.The regular CMB simulation results showed that PM2.5 pollution was mainly affected by secondary components and mobile sources.The SEI results indicated that electricity,industrial production and mobile sources were the largest contributors to the emission of PM2.5 gaseous precursors.The simulation results of the CMB-SEI model showed that PM2.5 pollution in the coastal areas of Zhejiang Province presented complex pollution characteristics dominated by mobile sources,electricity production sources and industrial production sources.Compared to the results of the CMB and SEI models alone,the CMB-SEI model completely apportioned PM2.5 to primary sources and simultaneously made the results more accurate and reliable in accordance with local industrial characteristics.

关键词： Integrated model Chemical mass balance Source emission inventory Source apportionment PM2.5

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基于冠层高光谱的冬小麦植株含水率估算

麦类作物学报 2024年第7期44卷 926-935页

作者：赵成韩娜娜周青云李松敏天津农学院水利工程学院天津300380

为确定适用于冬小麦植株水分诊断的最佳高光谱指数及其在植株水分处于适宜状态时的阈值,设置4个水分处理(灌溉定额分别为0、60、120和180 mm),获取了小麦关键生育时期(返青期、拔节期和灌浆期)的冠层高光谱反射率、植株含水率、土壤含... 详细信息

为确定适用于冬小麦植株水分诊断的最佳高光谱指数及其在植株水分处于适宜状态时的阈值,设置4个水分处理(灌溉定额分别为0、60、120和180 mm),获取了小麦关键生育时期(返青期、拔节期和灌浆期)的冠层高光谱反射率、植株含水率、土壤含水率和产量等数据。依据高光谱指数与冬小麦植株含水率之间的相关性对高光谱指数进行筛选,以筛选的高光谱指数为输入变量,分别构建一元回归、偏最小二乘回归、随机森林回归和支持向量回归的冬小麦植株含水率估测模型。考虑到土壤含水率对冬小麦植株含水率的影响,进一步量化了当日植株含水率与不同时间土壤含水率的关系,通过产量比较法分别确定了冬小麦植株水分、土壤水分的阈值。结果表明:(1)在返青期、拔节期和灌浆期,一元回归模型的精度(r^(2)=0.673,RMSE=3.144%,RE=5.489%)较好,能确定高光谱指数阈值,可以较精准、快捷地实现冬小麦水分诊断。机器学习算法中随机森林回归的模型精度(r^(2)=0.904,RMSE=1.701%,RE=3.606%)最高,但模型参数较多,无法给出高光谱指数阈值。(2)当日植株含水率与其前一天0~50 cm土层的含水率之间具有较强的正相关关系(r^(2)为0.708,RMSE为2.436%,RE为7.755%)。(3)返青期、拔节期和灌浆期估测冬小麦植株水分最佳高光谱指数分别为MCARI/0SAVI、PRI3和VEG,其相应的阈值分别为0.765 1~1.130 1、0.155 2~0.225 7、1.633 9~1.668 5。因此,可根据植株含水率与土壤含水率之间的关系确定冬小麦在关键生育期内所处水分状态,从而采取相应对策。

关键词：冬小麦植株含水率土壤含水率高光谱估算模型

先驱体转化法制备含异质元素碳化硅纤维的研究进展

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材料工程 2024年第3期52卷 1-11页

作者：吴爽苟燕子王永寿宋曲之徐娜娜韩成王应德国防科技大学空天科学学院新型陶瓷纤维及其复合材料重点实验室长沙410073

连续SiC纤维及其复合材料以其优异的耐高温、抗氧化以及机械性能在航空航天以及核领域有着广泛的应用前景。先驱体转化法已成为制备连续SiC纤维最重要的方法。特定异质元素的引入可以有效改善SiC纤维的性能。本文结合我们团队近40年在... 详细信息

连续SiC纤维及其复合材料以其优异的耐高温、抗氧化以及机械性能在航空航天以及核领域有着广泛的应用前景。先驱体转化法已成为制备连续SiC纤维最重要的方法。特定异质元素的引入可以有效改善SiC纤维的性能。本文结合我们团队近40年在先驱体转化法制备高性能SiC纤维领域的相关工作,首先综述了异质元素的引入方式,主要包括物理共混和化学改性;从提高先驱体的陶瓷产率、促进纤维烧结致密化,提高SiC纤维的耐高温性能以及拓展SiC纤维的功能化应用等方面阐述了异质元素的作用和机理;然后分别介绍了国内外含Ti、Al、Zr、Fe、B以及难熔金属(Hf、Ta、Nb)等含异质元素SiC纤维的组成、结构与性能以及发展现状,最后对陶瓷先驱体体系构建、异质元素种类含量与纤维性能构效关系研究、以及纤维工程化应用等研究方向进行了展望。

关键词：先驱体转化法碳化硅纤维异质元素作用机理

慢性阻塞性肺疾病急性加重期患者肺康复分级方案的构建与应用

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中华护理杂志 2024年第7期59卷 773-781页

作者：杨娜娜曾慧符丹丹王燕程传丽刘容罗露文遵义医科大学护理学院遵义市563000 遵义医科大学第二附属医院护理部遵义医科大学第二附属医院呼吸科

目的构建COPD急性加重期患者肺康复分级方案并进行初步应用,为护理人员科学地实施肺康复提供参考。方法2023年3月—10月,基于Triangle模型和循证方法构建肺康复分级方案初稿,通过2轮专家函询对条目进行修订,将构建的肺康复分级方案在10... 详细信息

目的构建COPD急性加重期患者肺康复分级方案并进行初步应用,为护理人员科学地实施肺康复提供参考。方法2023年3月—10月,基于Triangle模型和循证方法构建肺康复分级方案初稿,通过2轮专家函询对条目进行修订,将构建的肺康复分级方案在10例COPD急性加重期患者中进行初步应用。结果2轮专家函询问卷有效回收率均为100%,专家权威系数分别为0.857、0.863,变异系数分别为0~0.285、0.052~0.244,肯德尔和谐系数分别为0.167、0.145(均P<0.001)。最终形成的方案包括4个一级指标,13个二级指标,25个三级指标。方案应用后患者6 min步行试验、改良版英国医学研究委员会呼吸困难问卷和COPD疾病评分较干预前均有所改善,差异具有统计学意义(均P<0.05)。结论该研究构建的COPD急性加重期患者肺康复分级方案具有较好的科学性和实用性,可为临床实施肺康复提供参考。

关键词：肺疾病慢性阻塞性急性加重期运动康复 Triangle模型德尔菲法护理

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全球地热发电现状与研究进展

热力发电 2024年第6期53卷 1-11页

作者：李娜娜陶诚孔彦龙白冰熊萍赵晏强中国科学院武汉文献情报中心科技大数据湖北省重点实验室湖北武汉430071 中国科学院地质与地球物理研究所中国科学院页岩气与地质工程重点实验室北京100029 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室湖北武汉430071 中国科学院大学信息资源管理系北京100049

地热发电作为地热资源开发利用的主要方式之一,其发展对于促进能源结构低碳清洁、推动“双碳”目标的实现意义重大。在明确世界及中国地热能发电发展历程,以及干蒸汽发电技术、闪蒸式发电技术、双循环(双工质)发电技术、全流发电技术等... 详细信息

地热发电作为地热资源开发利用的主要方式之一,其发展对于促进能源结构低碳清洁、推动“双碳”目标的实现意义重大。在明确世界及中国地热能发电发展历程,以及干蒸汽发电技术、闪蒸式发电技术、双循环(双工质)发电技术、全流发电技术等主要地热发电技术概况的基础上,详细阐述了干热岩发电技术、热伏发电技术、超临界CO_(2)循环发电技术、联合发电技术,以及地热-太阳能、地热-风能、地热-生物质能、地热-海洋能等多能互补发电技术等新兴地热发电技术及其研究进展,结合我国地热发电现状及存在问题,提出了我国地热发电发展的建议,以期对我国地热发电的未来发展提供参考借鉴。

关键词：地热资源地热发电发电技术现状与问题建议

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露天人饮供水管道冻结时间计算

水利技术监督 2024年第5期 218-223页

作者：陈娜娜程玉菲王军德甘肃省水利科学研究院甘肃兰州730000

农村人饮工程末梢管道冻胀问题是当前乃至今后面临的难题之一。考虑风速对管壁内外散热的影响,对热工原理公式加以改进。通过计算不同情景下管道自停水至断面结冰率为30%所需冻结时间,明晰管道冻结原理。结果表明:环境温度每降低1℃,DN2... 详细信息

农村人饮工程末梢管道冻胀问题是当前乃至今后面临的难题之一。考虑风速对管壁内外散热的影响,对热工原理公式加以改进。通过计算不同情景下管道自停水至断面结冰率为30%所需冻结时间,明晰管道冻结原理。结果表明:环境温度每降低1℃,DN20~50不保温管道冻结时间缩短5~12min。对保温管道而言,加厚保温层具有一定的保温效果,但是相较于温度降低的幅度,效果逐渐减小。温度每降低1℃,保温层厚度每减少1mm,DN20~50管道冻结时间相应减少6~17min。可根据本次计算结果对管道冻结时间作出初步估计,从而更好指导生活实际。

关键词：农村人饮工程供水管道冻结时间