Norovirus Infection and Histo-blood Group Antigens in Children Hospitalized with Diarrhea in Lulong and Chenzhou in China

Norovirus （NOV） is a pathogen that commonly causes viral diarrhea in children. Studies indicate that NoV recognizes human histo-blood group antigens （HBGAs） as cell attachment factors. In order to explore the correlation between of NoV infection and HBGAs, a cross-sectional study was conducted in children less than five years old who were hospitalized with diarrhea in two areas of China between November 2014 and February 2015. Of the paired stool and saliva samples taken from 424 children,

Vulnerability Assessment of Snow Disaster Based on Traffic System:A Case Study of Chenzhou City in Hunan Province,China

The article establishes the patterns of urban snow disaster system and disaster chain based on the theory of regional disaster system. The patterns indicate that urban snow disaster is exacerbated mainly through the traffic system. In addition, the paper sets up the vulnerability assessment index system and synthetically vulnerability assessment model of urban snow disaster which are mainly based on traffic system, and applies them in Chenzhou City. The results of assessment indicate that obvious geographical differences exist in the vulnerability of snow disaster bearing bodies: vulnerability of Chenzhou section of the Beijing-Zhuhai expressway is the highest in Chenzhou City, and the southeastern counties are more vulnerable than the northwest region. Furthermore, according to the snow disaster vulnerability dynamic process analysis, the vulnerability of Chenzhou City obviously increased in 2008 winter compared with that in 2007. Finally, the paper presents some suggestions for the locations of the emergency commands and the reserves of relief materials based on the evaluation results, and points out that disaster monitoring and relevant technical level should be strengthened for the minimization of traffic system's vulnerability.

SWOT Analysis and Development Strategy of Tobacco Production in Chenzhou City

The research analyzed advantages, disadvantages, opportunities and threats of tobacco production in Chenzhou and proposed a middIe and Iong-term objective for tobacco production, as weI as protection measures, providing refer-ences for transformation, innovation and spanning deveIopment.

Study on Climate Changes for Flue-Cured Tobacco Growth in Chenzhou City of Hunan Province

Chenzhou city is the most typical region of Nanling Hill Ecological Zone of flue-cured tobacco with of aroma style of burnt sweet and pure sweet in China and is the largest planting region of flue-cured tobacco in Hunan province. It is of significance to study the changes of climatic parameters with time because climate is the most important factor in determining the growth, yield and quality of flue-cured tobacco. In this study, the data of climatic parameters including cumulative sunshine hours(S), mean temperature (T) and cumulative precipitation (P)from 1952 to 2018 in Chenzhou were used to analyze their changes at the scales of year, whole field period and growing period of flue-cured tobacco. The results showed that at the scale of year, the cumulative S, mean T and cumulative P were ranged from 1029.0 h to 2072.1 h, from 17.1°C to 19.5°Cand from 897.1 mm to 2244.6 mm, with the means of 1449.7 h, 18.1°C and 1482.5 mm, respectively. At the scale of whole field period of flue-cured tobacco, the cumulative S, mean T and cumulative P were ranged from 298.1 h to 807.2 h, from 21.2°C to 23.9°C and from 416.7 mm to 1102.7 mm, with the means of 514.8 h, 22.3°C and 719.0 mm, respectively. At the scale of growing period of flue-cured tobacco, the annual cumulative S were ranged from 70.0 h to 257.2 h, from 77.3 h to 322.5 h and from 131.2 h to 300.3 h in the periods of rooting, flourishing and maturing with the means of 127.8 h, 190.4 h and 197.2 h, respectively. The mean temperatures were ranged from 14.2°C to 18.9°C, from 22.2°C to 26.1°C, and from 25.8°C to 29.6°C with the means of 16.4°C, 24.1°C and 28.0°C, respectively. The annual cumulative P were ranged from 69.9 mm to 553.9 mm, from 133.1 mm to 485.6 mm and from 46.4 mm to 356.8 mm in the periods of rooting, flourishing and maturing with the means of 262.5 mm, 299.9 mm and 153.9 mm, respectively. At the year scale, cumulative S annually decreased by 7.587 h, mean T annually increased by 0.02°C, while cumulative P changed irregularly with insignificantly increasing about by 0.184 mm annually. At the scale of whole field period of flue-cured tobacco, mean T annually increased by 0.0195°C, while both cumulative S and P changed irregularly with insignificantly decreasing by 1.64 h and 1.62 mm annually, respectively. At the scale of growing period of flue-cured tobacco, all climatic parameters changed irregularly except cumulative S in significant positive compound function in the maturing period. Meanwhile, the slight decreasing tendency of cumulative sunshine hours and the slight increasing tendency of cumulative precipitation are disadvantageous while the slight increasing tendency of cumulative precipitation in the maturing period is positive for the growth and quality of flue-cured tobacco.

Study on Chemical Characteristics of Rainfall in Tobacco-Growing Regions of Chenzhou, Hunan Province

In order to clarify the chemical properties of rainfall in typical tobacco areas in Chenzhou City, Hunan Province, and analyze its potential for soil and flue-cured tobacco planting, rainfall samples in 2020 were collected by rainfall instruments in Fangyuan Town and Aoquan Town of Guiyang County, and the chemical properties that are closely related to the quality of flue-cured tobacco were determined, such as pH, EC, total nitrogen (TN), nitrate nitrogen (), ammonium nitrogen () and ion concentrations (K+, Na+, Ca2+, Mg2+, , Al3+, , Cl−,). The results show that the pH values of rainfall samples at Fangyuan and Aoquan monitoring sites are in the range of 4.92 - 6.17 and 4.93 - 5.69 respectively, with an average of 5.27 and 5.27 respectively. The acid rain characteristic is very obvious, which is mainly dominated by . The variation of rainfall EC has seasonal characteristics. EC is low from January to September, in the range of 6.09 - 56.72 and 11.83 - 30.93 μS/cm respectively, besides, it is high from October to December, in the range of 102.63 - 174.60 and 25.05 - 86.37 μS/cm respectively. The annual deposition of TN was 22.19 and 20.76 kg/hm2/yr respectively, which were higher than that in the western regions with less human disturbance, but lower than or equal to that in the developed agricultural regions in eastern China. The proportion of in the annual deposition of TN was higher than that of at two monitoring sites, with an average of 56.51% and 38.86% respectively. Ammonia volatilization from agricultural activities contributed more to rainfall nitrogen content. The ratios of ammonium nitrogen to nitrate nitrogen deposition at two monitoring points were 1.84, 1.81, 1.86 and 1.34, 1.46, and 1.29 during the whole year, summer and autumn, winter and spring respectively. The ratio is higher in summer and autumn than in winter and spring. The weighted average equivalent concentrations of the main ions at two monitoring sites were 238.88 μeq/L and 211.21 μeq/L respectively, and the orders of the ion concentrations were slightly different. Both the concentrations of and are higher, while Mg2+, and Al3+ are lower. , and are mainly from human activities with a contribution rate between 91.90% and 99.35%. Ca2+ mainly comes from soil and ground dust, besides, Cl− and Mg2+ mainly come from marine sources and K+ mainly comes from terrestrial sources. In general, the acidic rainfall and higher concentration are beneficial to reducing the high pH value of soil in Aoquan tobacco area and improving the quality of flue-cured tobacco. Higher concentrations of and in rainfall are not conducive to the improvement of flue-cured tobacco quality, because of the high content of soil available sulfur in Chenzhou tobacco area and the characteristics of flue-cured tobacco’s preference for ammonium.

郴州市秋冬季PM_(2.5)污染传输路径与潜在源贡献分析

通过应用HYSPLIT、MeteoInfo模型,计算2017—2021年秋冬季抵达郴州地区72 h的后向气流轨迹并进行轨迹聚类、潜在源贡献因子(PSCF)和浓度权重轨迹(CWT)分析,探讨郴州市PM_(2.5)传输特征及污染潜在源分布。结果表明,郴州市秋冬季PM_(2.5)潜在源区主要分布在北偏东方向,以近距离输送为主,频率最高的是从咸宁市通城县经岳阳市平江县、株洲地区的短距离轨迹,其频率为34.17%;WPSCF高值带起源于河南省,经湖北、平江、江西等地区,最终到达郴州。WCWT分析结果得出,PM_(2.5)污染趋势与上述一致,影响范围更宽,影响程度相对较轻。2017—2021年间,郴州地区污染传输通道影响逐年减小,PM_(2.5)浓度平均下降19.7%。

“双碳”目标下郴州市东江湖水资源-经济-社会-环境-科技耦合协调发展研究

构建郴州市东江湖水资源-经济-社会-环境-科技5个子系统、16个评价维度、78个评价指标的评价体系,运用熵值法和耦合协调度模型测算其耦合协调度,破解“水资源利用效率低、重金属污染等问题”。研究结果表明:郴州市东江湖水资源评价指数呈缓慢下降趋势、经济呈较快增加趋势,水资源与经济两个子系统处于较高水平发展;社会、环境、科技3个子系统同样呈现出较好发展趋势,但仍处于较低水平;5个子系统自2018年步入高水平耦合度发展阶段和中等耦合协调度发展阶段,其中2019—2021年为良好耦合协调类型。

农村电商发展对农户收入的影响研究

基于湖南省郴州市2969份农户的调研问卷,借助OLS模型和PSM模型实证分析农村电商发展对农户收入的影响。研究表明,农村电商发展显著提升农户的非农业经营性收入,经过转换模型后结论依旧成立。此外,研究还发现农村电商通过强化信息获取、降低交易成本以及增强金融支持能促进农户收入增长。因此,推动农村电商健康发展,对农户增收、实现共同富裕具有重要意义。

2021—2023年郴州市地表水水质状况分析

为了解郴州市地表水的水质状况,分析郴州市在2021—2023年的水质监测数据,全面评估郴州市的水质变化趋势、空间分布特征及潜在的环境健康风险。结果显示,2021—2023年,郴州市地表水质量显著改善,优良水质(Ⅰ~Ⅲ类)比例逐年上升至100%,且在2022年消除了Ⅳ类及以下水质断面,其中Ⅰ、Ⅱ类水质占比显著提升。通过对比分析各县(市、区)的水质指数,发现地表水水质整体向好,但局部区域,如临武县和北湖区,仍面临水质波动较大的问题。相关研究结论揭示了郴州市水质改善措施的有效性与地域差异性,为制定水资源保护策略提供了科学依据。

汕尾市晨洲生蚝品质分析与检测模型的建立与优化

晨洲生蚝是广东省汕尾市重要的水产品品牌,其品质直接关系到市场竞争力和消费者健康。建立科学、高效的品质检测模型对于提升生蚝养殖水平和保障食品安全具有重要意义。本研究通过整合多种检测技术,构建了一套综合评价体系,包括感官指标、理化指标和微生物指标,并利用机器学习算法(神经网络、支持向量机和随机森林)优化了检测模型。实验结果表明,优化后的模型在准确性、稳定性和效率方面均有显著提升,总体准确率达到94.2%,每样本推理时间为0.08 s;在实际样品检测中,模型准确率和分级效率均优于人工,为晨洲生蚝的品质管理提供了有力的技术支持。

土地储备全生命周期信息化管理系统设计与实践--以郴州市为例

土地储备作为城市发展的重要支撑,其管理效率和效果直接关系到城市发展的质量和可持续性。然而,当前土地储备管理中仍然存在运行机制执行不充分,管护和前期开发工作落实不到位,土地盘活利用不够,部分业务环节仍采取纸质流转、纸质台账式管理等问题,无法实现土地储备项目全生命周期管理。本文以郴州市为例,深入研究了利用数字化技术构建土地储备全生命周期信息化管理系统的设计与实践路径,通过综合运用地理信息系统(GIS)、大数据、物联网、智能监控、移动互联网等新一代信息技术,在土地储备信息的空间可视化、业务全流程管理、管护巡查和土地资产推介等方面进行创新运用,构建了集收储规划、土地收储、前期开发、管护与供应、成果归档等于一体的土地储备全生命周期信息化管理系统。郴州市实践表明,土地储备管理信息化取得了提高工作效率、增强决策科学性、促进政务公开透明等具体成效,为其他地区土地储备管理的信息化转型提供了可借鉴的经验和路径。

基于生态资源与网络大数据叠加的郴州市森林康养资源评价研究

本文提出了一种基于生态资源数据与网络大数据叠加分析的森林康养资源评价方法,弥补目前国内外对森林康养资源评价方法尚无定式的现状,为定性与定量评价森林康养资源质量和潜力提供理论参考。以郴州市森林资源二调数据库、交通现状等生态资源数据、网络大数据和国家及湖南已颁发的技术标准与规范为依据,本文通过构建森林康养资源评价指标体系,采用德尔菲法确定各因子权重,进行因子叠加分析,得到郴州市森林康养资源评价图。结果表明:(1)郴州市森林康养资源普遍较好,从东部、中部至西部呈现由高至低分布特点;(2)东部地区的资兴市东江湖周边、桂东县、汝城县的森林康养资源最好,中部郴州市中心城区周边、郴州狮子口省级自然保护区及南部宜章莾山的森林康养资源优良,西部地区的嘉禾国家森林公园、临武东山林场、西瑶绿谷国家森林公园周边的森林康养资源良好;(3)全市最好的优质森林康养资源主要集中分布在东、中部的国家风景名胜区、国家自然保护区和国家森林公园等自然保护地及汝城益将、资兴滁口等国有林场。本文的研究结论在于,通过建立以森林生态资源、交通区位及网络大数据为依据的评价指标体系,对郴州市域森林康养资源进行叠加综合分析评价,研究方法实用、高效、可操作性强,结果科学、客观。研究结果可为制定郴州森林康养产业发展政策和编制发展规划提供技术支持,对优化康养资源配置和项目布局具有一定意义。

不同玉竹品种主要农艺性状及叶绿素含量比较

以郴州地区3个不同玉竹品种(高禾尾参、猪屎尾参1和猪屎尾参2)为研究对象,比较不同玉竹品种农艺性状(株高、地径、叶长和叶宽)和叶绿素含量(叶绿素a、叶绿素b和叶绿素总含量)的差异,评价不同品种玉竹的种苗质量。结果表明,高禾尾参、猪屎尾参1和猪屎尾参2各物候期农艺性状及叶绿素含量有一定差异,其中高禾尾参生长性状表现较好,其株高、地径、叶长等生长指标高于其他两个玉竹品种,叶绿素含量较高,种质优势明显;猪屎尾参2植株发育相对迟缓,株高、地径、叶长、叶绿素含量等均低于其他两个玉竹品种。

古代诗词地理意象的时空层积与规划设计应用——以郴州地区为例

随着学科交叉的不断深入,借助诗词这一文学媒介进行古代地域空间意象的研究日益增多。回顾城市意象与文学地理意象的相关研究,在诗词意象信息提炼和分类的基础上,建立诗词地理意象的时空特征分析框架。通过意象词频和历时性的计算,分析郴州地区诗词地理意象的时空层积度,进一步比较其时空特征差异和意象偏好。

郴州市“三生”空间适宜性评价及其特征分析

“生产—生活—生态”空间(“三生”空间)适宜性评价是国土空间规划和管理的基础,对于协调国土空间开发与保护、平衡区域发展具有重要意义。以湖南省郴州市为研究对象,首先基于空间适宜性构建评价指标体系,开展“三生”空间适宜性评价,定量划分“三生”空间;然后依据适宜性评价结果,对“三生”空间的空间分布特征、“三生”空间适宜性耦合协调特征及其空间自相关性进行分析。结果表明:(1)生产空间和生活空间适宜性具有相似的空间分布特征,生态空间适宜性分布格局则呈相反空间分布特征;(2)生产空间、生活空间和生态空间总体呈现显著的空间异质性分布格局,分别占国土面积的21.91%、5.97%和72.12%;(3)“三生”空间耦合协调度等级及其冷热点空间分布与“三生”空间分布格局具有较强的一致性,高、较高、中等、较低、低度协调区域面积分别占国土面积的10.33%、20.89%、23.73%、20.15%、24.90%。

缓释肥不同配比对郴州烤烟产量及品质的影响

为进一步探究缓释肥对烟叶产量及品质的影响,以云烟87为供试烤烟品种,在郴州烟区设置了施氮量不变的情况下分别配施0(CK)、50%、70%的缓释肥和在减氮12.5%的情况下配施50%、70%的缓释肥5种不同配比方案,对烟叶田间生长发育及烤后烟叶产值、品质进行采样分析。结果表明:施用不同比例的缓释肥对烤后烟叶外观质量整体影响不大;施氮量不变的情况下,50%底肥+50%缓释肥的配比方案烤烟农艺性状表现最佳,能够最大程度地增加烤后烟叶的产量、产值、单叶重及上等烟比例,改善烤后烟叶化学成分协调性,同时保证中性致香物质略有增加,有效减少后期施肥管理的人工成本,提高经济效益;施氮量减少12.5%的情况下,增施或减少缓释肥占比烤烟的农艺性状均表现欠佳,烤后烟叶的产量、产值及上等烟比例降低,化学成分协调性及中性香气物质的产生均有所欠缺。因此,在郴州植烟地区可以示范推广施氮量不变、50%底肥+50%缓释肥的施肥配比方案。

湖南邓阜仙矿田隐爆角砾岩与钨锡成矿关系

湖南邓阜仙矿田是我国华南著名的钨锡多金属矿产地,随着多年的矿山开采,资源已逐渐枯竭,亟需新的找矿突破。近期在矿田西侧发现多处隐爆角砾岩,为钨锡成矿作用和找矿勘查打开了新窗口。本文对该隐爆角砾岩开展了系统地质调查、岩相学、岩石地球化学、锆石年代学与Lu-Hf同位素分析,研究表明:1)隐爆角砾岩筒主要沿茶陵-郴州-临武断裂发育,具有显著分带性,从中心到外围依次为长英质岩脉、隐爆角砾岩带、裂隙带,且存在多期热液活动与矿化;2)长英质岩脉锆石U-Pb加权年龄为(151.9±1.2)Ma,形成时代与矿田成矿高峰期一致;3)岩脉富集Rb、Th和U,亏损Sr、Ba、K和P等元素,具有高的分异指数(DI为94.77~97.11),其锆石ε_(Hf)(t)为-6.8~-0.8(均值为-4.7),TDM2为1253~1638 Ma,与矿田成矿花岗岩具有相似的微量元素和Lu-Hf同位素组成,指示二者应为同一岩浆源区。综合分析认为,矿田隐爆角砾岩与钨锡多金属成矿关系密切,尽管目前已发现的钨锡矿床均集中在矿田东部,但是西部同样有较大的钨锡找矿潜力,尤其是茶陵-郴州-临武断裂附近。隐爆角砾岩是寻找钨锡多金属矿床的有利找矿标志,应给予高度重视。

郴州市郴江河流域水质与土地利用关联的空间异质性分析

为了研究郴州市郴江河流域水质与土地利用关联的空间异质性特征,采集了2021年9月流域水质与高分遥感数据;通过不同类型、不同尺度的流域缓冲区划分,计算土地利用组分及各地类斑块形状、尺寸及分布等景观配置;利用单因子、多因子相关性分析,进行区域土地利用对水质的空间异质性影响分析。结果表明:①在水质与土地利用单因子空间异质性关联分析中,圆形缓冲区的普适性优于河岸缓冲区,而河岸缓冲区在分析建筑用地占比对各水质参数的影响方面起补充作用。在多因子空间异质性关联分析中,河岸缓冲区土地利用对水质参数的解释率普遍高于圆形缓冲区,圆形缓冲区土地利用对水质参数的总解释率最大值出现在半径700 m尺度。②不同土地利用组分对水质的影响不同,耕草地、林地、水域面积占比与水质呈正相关关系,建筑物、裸地呈负相关关系,其中耕草地与建筑用地对水质影响最大;在进行土地利用规划时,要考虑到土地利用组分的影响,合理分配人工地物和自然地物面积占比。③不同土地利用景观配置对水质影响不同。其中反映斑块形状与尺寸的景观形状指数(landscape shape index,LSI)、最大斑块指数(largest patch index,LPI)对水质存在负面影响,反映斑块分布的散布与并列指数(interspersion and juxtaposition index,IJI)和水体氨氮(ammonia nitrogen,NH3-N)含量在小尺度内呈负相关。在进行土地利用规划时更要考虑到景观配置的合理性,例如要控制缓冲区内优势地类斑块大小。研究结论找出了最能影响水质的缓冲区大小,揭示了最能解释郴江河水质的土地利用组分及其景观配置,为郴江河水质恶化的科学治理措施提供选择依据,对水环境保护有一定意义。

湖南郴州丹霞地貌景观特征、成因及演化探讨

湖南郴州飞天山—高椅岭丹霞地貌是华南地区特色景点之一,以圆顶岩丘景观为特点,与目前常规丹霞地貌存在显著差异。然而,关于其地貌特色、成因机理及演变过程等依然缺乏详细的研究,这与其社会知名度及特殊地貌蕴涵的科学价值不相符。本研究通过野外实地调查,查明飞天山—高椅岭丹霞地貌由石寨、岩丘、赤壁、石柱、石墙和洞穴及线状沟槽等7种地貌亚类型组成。研究区东、西两侧丹霞景观差异大,在景区东侧,以圆顶岩丘、石寨等特色地貌占主导地位,发现其构景岩层为风成沙漠相砂岩,发育巨型交错层理、小尺度的粒流层和波纹层等典型风成沉积构造。而景区西侧则为“顶斜、陡坎和麓缓”峰林型丹霞地貌景观,岩石类型以冲积扇相块状砾岩为主。不同的岩相类型,是造成景区东、西两侧景观差异的主要因素,后来叠加喜马拉雅期多期次构造改造、水流侵蚀和风化崩塌等作用而最终形成多样化的地貌形态。面积高程积分模型(HI)分析结果表明景区丹霞地貌整体处于老年早期的残丘阶段。综合分析提出了“沉积作用孕景→构造抬升造景→地表营力雕景”的三阶段成景模式。本研究旨在解析丹霞地貌的成因,提升景区丹霞地貌品牌内涵;研究成果有助于深化对华南湿润气候区岩丘状丹霞特色景观的理解,为华南白垩纪丹霞地貌地质遗迹的开发利用提供科学指导与借鉴。

华南块体西南缘地壳结构特征及其地质意义

新元古代早期以来,扬子和华夏块体开始碰撞拼合并形成了华南块体,之后又经历了多期复杂的构造-岩浆活动。华南块体地壳厚度和分层结构的研究,有助于进一步认识华南块体碰撞活动历史,对与之相关的中生代大规模成岩成矿作用有启发意义。本文基于华南西南缘162个宽频带固定台站记录的16个月垂直分量连续波形数据,利用背景噪声互相关技术提取经验格林函数,并开展了面波层析成像研究,获得了3~45 s的Rayleigh波相速度分布图和50 km以浅的地壳和上地幔顶部S波速度结构。不同深度的S波速度切片显示,扬子块体的地壳厚度整体大于华夏块体的地壳厚度,两者在20 km以深的中下地壳和上地幔顶部存在明显的速度差异,高、低速异常的分界大致位于郴州-临武断裂以西。跨郴州-临武断裂的3条S波速度剖面则进一步显示,以郴州-临武断裂为代表的上地壳逆冲断层和中下地壳北西西倾向的断裂均汇聚于中地壳低速的脆韧性过渡带,推测这些构造可能是扬子和华夏块体碰撞后形成的逆冲推覆构造,并在燕山期伸展背景下进一步活化为地壳或超壳尺度的拆离断层。结合已有地质、地球物理资料,推测郴州-临武断裂为扬子和华夏块体在华南西南缘的构造边界,且扬子和华夏块体碰撞拼贴时,后者的上、下地壳可能发生了解耦。