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以水定城:侗族水文化与生态实践研究

青海民族研究 2024年第1期35卷 183-189页

作者：崔海洋王贺广王筑云贵州大学贵州贵阳550025

水作为侗族的生命依托和文化源流,孕育和成就了侗族水文化多层次的内涵。侗寨、风雨桥、稻鱼鸭共生模式、水笕、水车、水井等具有侗族水文化代表性的元素符号,在构建水文化生态共同体中发挥着重要作用。以侗族“城”与“水”的关系为切... 详细信息

水作为侗族的生命依托和文化源流,孕育和成就了侗族水文化多层次的内涵。侗寨、风雨桥、稻鱼鸭共生模式、水笕、水车、水井等具有侗族水文化代表性的元素符号,在构建水文化生态共同体中发挥着重要作用。以侗族“城”与“水”的关系为切入点,依托共生于侗族聚落中的水观念、水技术和水制度来探讨侗族水文化在生态文明视域下的生态实践价值,以期为生态文明视域下的生态建设提供民族地区的参考样板。

关键词：侗族聚落水文化生态

TG酶/k-卡拉胶协同改性明胶复合膜的工艺优化及表征

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中国调味品 2024年第2期49卷 10-18,27页

作者：应天昊朱芸杉胡杨华中农业大学食品科学与技术学院武汉430070

为了研制一种性能优良的天然保鲜膜,该研究以明胶为基质,通过k-卡拉胶与谷氨酰胺转氨酶(TG酶)对明胶进行协同改性,采用流延法制备一种新型明胶复合膜,通过单因素试验与正交试验研究k-卡拉胶添加量、TG酶添加量、TG酶反应时间和干燥温度... 详细信息

为了研制一种性能优良的天然保鲜膜,该研究以明胶为基质,通过k-卡拉胶与谷氨酰胺转氨酶(TG酶)对明胶进行协同改性,采用流延法制备一种新型明胶复合膜,通过单因素试验与正交试验研究k-卡拉胶添加量、TG酶添加量、TG酶反应时间和干燥温度对明胶复合膜物理性能的影响。得出最佳制备工艺为明胶添加量5%、k-卡拉胶添加量0.5%、TG酶添加量0.2%、反应时间60 min、干燥温度45℃。在最佳工艺条件下制备的明胶复合膜拉伸强度为14.33 MPa,断裂伸长率为44.24%,水溶性为26.72%,水蒸气透过系数为0.278 g·mm/(kPa·h·m^(2))。优化制备工艺后,利用X射线衍射、热重分析等手段对不同明胶复合膜的结构进行表征。表征结果表明,k-卡拉胶与TG酶分别通过静电相互作用与氨基酸异肽键对明胶进行协同改性。该研究为新型明胶复合膜的开发提供了理论依据。

关键词：明胶 k-卡拉胶 TG酶复合膜协同改性

Enhancement of the polynomial functions response surface model for real-time analyzing ozone sensitivity

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Frontiers of Environmental Science & Engineering 2021年第2期15卷 155-168页

作者： Jiangbo Jin yun zhu Jicheng Jang Shuxiao Wang Jia Xing Pen-Chi Chiang Shaojia Fan Shicheng Long Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China Southern Marine Science and Engineering Guangdong Laboratory Sun Yat-Sen UniversityZhuhai 519000China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Graduate Institute of Environmental Engineering Taiwan UniversityTaipei 10673China Carbon Cycle Research Center Taiwan UniversityTaipei 10672China

Quantification of the nonlinearities between ambient ozone(O3)and the emissions of nitrogen oxides(NOx)and volatile organic compound(VOC)is a prerequisite for an effective O3 control strategy.An Enhanced polynomial functions Response Surface Model(Epf-RSM)with the capability to analyze O3-NOx-VOC sensitivities in real time was developed by integrating the hill-climbing adaptive method into the optimized Extended Response Surface Model(ERSM)system.The Epf-RSM could single out the best suited polynomial function for each grid cell to quantify the responses of O3 concentrations to precursor emission changes.Several comparisons between Epf-RSM and pf-ERSM(polynomial functions based ERSM)were performed using out-of-sample validation,together with comparisons of the spatial distribution and the Empirical Kinetic Modeling Approach diagrams.The comparison results showed that Epf-RSM effectively addressed the drawbacks of pf-ERSM with respect to overfitting in the margin areas and high biases in the transition areas.The O3 concentrations predicted by Epf-RSM agreed well with Community Multi-scale Air Quality simulation results.The case study results in the Pearl River Delta and the north-western area of the Shandong province indicated that the O3 formations in the central areas of both the regions were more sensitive to anthropogenic VOC in January,April,and October,while more NOx-sensitive in July.

关键词： Response surface model Hill-climbing algorithm Ozone pollution Precursor emissions Control strategy

基于MRI影像组学机器学习模型在脊髓型颈椎病危险度分级中的价值

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磁共振成像 2024年第4期15卷 50-55,77页

作者：徐刚陈鹏李宇龙朱芸谢宗玉安徽理工大学附属淮南新华医院医学影像科淮南232000 湖州市中心医院放射科湖州313000 安徽理工大学附属淮南新华医院脊柱骨科淮南232000 蚌埠医科大学第一附属医院放射科蚌埠233000

目的探讨基于MRI放射组学特征的机器学习(machine learning,ML)模型对脊髓型颈椎病(cervical spondylotic myelopathy,CSM)进行危险度分级的价值。材料与方法回顾性分析临床诊断为CSM的患者病例317例,并使用日本骨科协会(Japanese Ortho... 详细信息

目的探讨基于MRI放射组学特征的机器学习(machine learning,ML)模型对脊髓型颈椎病(cervical spondylotic myelopathy,CSM)进行危险度分级的价值。材料与方法回顾性分析临床诊断为CSM的患者病例317例,并使用日本骨科协会(Japanese Orthopaedic Association,JOA)评估治疗分数分为轻症组193例和中重度组124例。手动勾画脊髓轴位T2WI像生成感兴趣区(region of interest,ROI)并提取放射组学特征,使用Z-Score标准化进行统一量度,皮尔森相关系数(Pearson correlation coefficients,PCC)进行数据降维。使用递归特征消除(recursive feature elimination,RFE)进行特征筛选,并使用逻辑回归(logistic regression,LR)、自适应增强机(adaboost,AB)、贝叶斯算法(native Bayes,NB)及支持向量机(support vector machine,SVM)四种分类器模型来构建ML模型。通过受试者工作特征(receiver operating characteristic,ROC)曲线的曲线下面积(area under the curve,AUC)评价模型效能。结果共筛选出15个放射组学特征用于模型构建,四种分类器中,SVM(训练组和验证组AUC分别为0.833和0.813)和LR(训练组和验证组AUC分别为0.831和0.812)模型分级能力较好,且较稳定,模型之间差异无统计学意义,AB分类器在训练组中分级能力最佳(AUC=0.984),但在验证组中能力欠佳(AUC=0.725),模型稳定性低于SVM和LR模型。结论基于MRI影像组学的ML模型对CSM有良好危险度分级能力,能够为临床术前诊断提供一定参考价值。

关键词：脊髓型颈椎病放射组学机器学习危险度分级磁共振成像

Source attribution for mercury deposition with an updated atmospheric mercury emission inventory in the Pearl River Delta Region, China

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Frontiers of Environmental Science & Engineering 2019年第1期13卷 39-52页

作者： Jiajun Liu Long Wang yun zhu Che-Jen Lin Carey Jang Shuxiao Wang Jia Xing Bin Yu Hui Xu Yuzhou Pan Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environment and Energy South ChinaUniversity of Technology Guangzhou Higher Education Mega Center Guangzhou 510006 China Department of Civil and Environmental Engineering Lamar University Beaumont TX 77710 USA US EPA Office of Air Quality Planning & Standards Res Triangle Park NC 27711 USA State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment. Tsinghua University Beijing 100084 China Guangzhou Environmental Monitoring Centre Guangzhou 510030 China

We used CMAQ-Hg to simulate mercury pollution and identify main sources in the Pearl River Delta (PR.D) with updated local emission inventory and latest regional and global emissions. The total anthropogenic mercury emissions in the PRD for 2014 were 11,939.6 kg. Power plants and industrial boilers were dominant sectors, responsible for 29.4 and 22.7%. We first compared model predictions and observations and the results showed a good performance. Then five scenarios with power plants (PP), municipal solid waste incineration (MSWI), industrial point sources (IP), natural sources (NAT), and boundary conditions (BCs) zeroed out separately were simulated and compared with the base case. BCs was responsible for over 30% of annual average mercury concentration and total deposition while NAT contributed around 15%. Among the anthropogenic sources, IP (22.9%) was dominant with a contribution over 20.0% and PP (18.9%) and MSWI (11.2%) ranked second and third. Results also showed that power plants were the most important emission sources in the central PRD, where the ultra-low emission for thermal power units need to be strengthened. In the northern and western PRD, cement and metal productions were priorities for mercury control. The fast growth of municipal solid waste incineration were also a key factor in the core areas. In addition, a coordinated regional mercury emission control was important for effectively controlling pollution. In the future, mercury emissions will decrease as control measures are strengthened, more attention should be paid to mercury deposition around the large point sources as high levels of pollution are observed.

关键词： Emission inventory Mercury deposition Pearl River Delta (PRD) Source attribution Control strategy

Evaluation of health benefit using Ben MAP-CE with an integrated scheme of model and monitor data during Guangzhou Asian Games

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Journal of Environmental Sciences 2016年第4期28卷 9-18页

作者： Dian Ding yun zhu Carey Jang Che-Jen Lin Shuxiao Wang Joshua Fu Jian Gao Shuang Deng Junping Xie Xuezhen Qiu Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environmental and Energy South China University of Technology Guangzhou Higher Education Mega Center Guangzhou 510006 China. State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 China USEPA/Office of Air Quality Planning & Standards RTP NC27711 USA Department of Civil Engineering Lamar University Beaumont TX 77710-0024 USA Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China Department of Civil & Environmental Engineering University of Tennessee Knoxville TN 37996-2010 USA Chinese Research Academy of Environmental Sciences Beijing 100012 China

Guangzhou is the capital and largest city（land area：7287 km2）of Guangdong province in South China.The air quality in Guangzhou typically worsens in November due to unfavorable meteorological conditions for pollutant dispersion.During the Guangzhou Asian Games in November 2010,the Guangzhou government carried out a number of emission control measures that significantly improved the air quality.In this paper,we estimated the acute health outcome changes related to the air quality improvement during the 2010 Guangzhou Asian Games using a next-generation,fully-integrated assessment system for air quality and health benefits.This advanced system generates air quality data by fusing model and monitoring data instead of using monitoring data alone,which provides more reliable results.The air quality estimates retain the spatial distribution of model results while calibrating the value with observations.The results show that the mean PM2.5concentration in November 2010 decreased by 3.5μg/m^3 compared to that in 2009 due to the emission control measures.From the analysis,we estimate that the air quality improvement avoided 106 premature deaths,1869 cases of hospital admission,and 20,026 cases of outpatient visits.The overall cost benefit of the improved air quality is estimated to be 165 million CNY,with the avoided premature death contributing 90%of this figure.The research demonstrates that Ben MAP-CE is capable of assessing the health and cost benefits of air pollution control for sound policy making.

关键词： Air quality Health benefit PM2.5 Ben MAP-CE Data fusion Model and monitor data

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7075铝合金多场耦合流变行为和软化机理

塑性工程学报 2024年第5期31卷 113-123页

作者：朱春雨夏建生窦沙沙刘镕滔钱海旭朱云飞盐城工学院机械工程学院江苏盐城224001 燕山大学机械工程学院河北秦皇岛066004

在应变速率为0.01~10 s^(-1),电流密度为18~27 A·mm^(-2),温度为150~330℃条件下,对7075铝合金进行了脉冲电流辅助拉伸实验。探讨了应变速率与电流密度对7075铝合金力学性能的影响,推导出耦合了电参数的修正Johnson-Cook本构模型,并进... 详细信息

在应变速率为0.01~10 s^(-1),电流密度为18~27 A·mm^(-2),温度为150~330℃条件下,对7075铝合金进行了脉冲电流辅助拉伸实验。探讨了应变速率与电流密度对7075铝合金力学性能的影响,推导出耦合了电参数的修正Johnson-Cook本构模型,并进行了验证。为解析热、电与力的耦合关系提供了新的研究思路。结果表明,与室温相比,通电试样的断面形貌中出现尺寸更大、分布更规整的韧窝。应变速率0.1~1 s^(-1)和电流密度21~24 A·mm^(-2)对降低7075铝合金的流动应力有着显著影响,说明电流密度的影响存在阈值。并且修正后的Johnson-Cook模型在预测上展现出了较高的可靠性,模型预测与试验数据高度吻合,相关性达到0.9961,平均绝对相对误差仅为3.35%。

关键词： 7075铝合金电塑性效应多场耦合 Johnson-Cook本构模型

A case study of development and application of a streamlined control and response modeling system for PM_(2.5)attainment assessment in China

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Journal of Environmental Sciences 2016年第3期28卷 69-80页

作者： Shicheng Long yun zhu Carey Jang Che-Jen Lin Shuxiao Wang Bin Zhao Jian Gao Shuang Deng Junping Xie Xuezhen Qiu School of Environment and Energy South China University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China USEPA/Office of Air Quality Planning&Standards RTPNC 27711USA Department of Civil Engineering Lamar UniversityBeaumontTX 77710-0024USA State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Chinese Research Academy of Environmental Sciences Beijing 100012China

This article describes the development and application of a streamlined air control and response modeling system with a novel response surface modeling-linear coupled fitting method and a new module to provide streamlined model data for PM_（2.5） attainment assessment in China.This method is capable of significantly reducing the dimensions required to establish a response surface model,as well as capturing more realistic response of PM_（2.5） to emission changes with a limited number of model simulations.The newly developed module establishes a data link between the system and the Software for Model Attainment Test—Community Edition（SMAT-CE）,and has the ability to rapidly provide model responses to emission control scenarios for SMAT-CE using a simple interface.The performance of this streamlined system is demonstrated through a case study of the Yangtze River Delta（YRD） in China.Our results show that this system is capable of reproducing the Community Multi-Scale Air Quality（CMAQ） model simulation results with maximum mean normalized error 〈 3.5%.It is also demonstrated that primary emissions make a major contribution to ambient levels of PM_（2.5） in January and August（e.g.,more than50%contributed by primary emissions in Shanghai）,and Shanghai needs to have regional emission control both locally and in its neighboring provinces to meet China＇s annual PM_（2.5）National Ambient Air Quality Standard.The streamlined system provides a real-time control/response assessment to identify the contributions of major emission sources to ambient PM_（2.5）（and potentially O_3 as well） and streamline air quality data for SMAT-CE to perform attainment assessments.

关键词： Response surface model RSM-Linear coupled fitting Air quality modeling Attainment assessment PM_（2.5）

Proteoglycans and their functions in esophageal squamous cell carcinoma

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World Journal of Clinical Oncology 2021年第7期12卷 507-521页

作者： yun zhu Annie Lai Man Cheung School of Biomedical Sciences The University of Hong KongHong KongChina

Esophageal squamous cell carcinoma(ESCC)is a highly malignant disease that has a poor prognosis.Its high lethality is mainly due to the lack of symptoms at early stages,which culminates in diagnosis at a late stage when the tumor has already metastasized.Unfortunately,the common cancer biomarkers have low sensitivity and specificity in esophageal cancer.Therefore,a better understanding of the molecular mechanisms underlying ESCC progression is needed to identify novel diagnostic markers and therapeutic targets for intervention.The invasion of cancer cells into the surrounding tissue is a crucial step for metastasis.During metastasis,tumor cells can interact with extracellular components and secrete proteolytic enzymes to remodel the surrounding tumor microenvironment.Proteoglycans are one of the major components of extracellular matrix.They are involved in multiple processes of cancer cell invasion and metastasis by interacting with soluble bioactive molecules,surrounding matrix,cell surface receptors,and enzymes.Apart from having diverse functions in tumor cells and their surrounding microenvironment,proteoglycans also have diagnostic and prognostic significance in cancer patients.However,the functional significance and underlying mechanisms of proteoglycans in ESCC are not well understood.This review summarizes the proteoglycans that have been studied in ESCC in order to provide a comprehensive view of the role of proteoglycans in the progression of this cancer type.A long term goal would be to exploit these molecules to provide new strategies for therapeutic intervention.

关键词： Esophageal squamous cell carcinoma Proteoglycan Glycosaminoglycan Serglycin Extracellular matrix Biomarker