With rapid economic development,the size of urban land in China is expanding dramatically.The Urban Growth Boundary(UGB)is an expandable spatial boundary for urban construction in a certain period in order to control ...With rapid economic development,the size of urban land in China is expanding dramatically.The Urban Growth Boundary(UGB)is an expandable spatial boundary for urban construction in a certain period in order to control the urban sprawl.Reasonable delineation of UGB can inhibit the disorderly spread of urban space and guide the normal development of the city.It is of practical significance for the construction of green urban space.The study utilizes GIS technology to establish a land construction suitability evaluation system for Nankang city,which is experiencing rapid urban expansion,and outlines the preliminary UGB under the future land use simulation(FLUS)model.At the same time,considering the coupled coordination of"Production-Living-Ecological Space",and based on the suitability evaluation,we revised the preliminary UGB by combining the advantages of the patch-generating land use simulation(PLUS)model and the convex hull model to delineate the final UGB.The results show that:1)the comprehensive score of the evaluation of the suitability of the construction of land from high to low shows the distribution of the center of the city to the surrounding circle type spread,the center of the city has the highest suitability score.The results of convex hull model show that the urban expansion type of Nankang is epitaxial.In the future,the urban expansion will mainly occur in the northern part of the city.The PLUS model predicts an increase of 3359.97 hm^(2)of construction land in Nankang by 2035,of which 2022.97 hm^(2)is urban construction land.2)The FLUS model has a prediction accuracy of 86.3%and delineates a preliminary UGB area of 9215.07 hm^(2).3)We used the results of the construction suitability evaluation,PLUS model simulation results,and convex hull model predictions to revise the originally delineated UGB.The final delineated UGB area is 8895.67 hm^(2)and it is capable of meeting the future development of the study area.The results of the delineation can promote sustainable urban development,and the delineation methodology can provide a reference basis for the preparation of territorial spatial planning.展开更多
保护集中连片的优质耕地对于保障国家粮食安全具有重要意义。本文以江西省兴国县为例,从耕地的自然质量、立地条件、生态条件3个层面系统构建耕地综合质量评价指标体系;基于TOPSIS(Technique for order preference by similarity to an ...保护集中连片的优质耕地对于保障国家粮食安全具有重要意义。本文以江西省兴国县为例,从耕地的自然质量、立地条件、生态条件3个层面系统构建耕地综合质量评价指标体系;基于TOPSIS(Technique for order preference by similarity to an ideal solution)综合评价法对耕地综合质量进行评价,引入耕地连片度、耕地空间连通格局分析了耕地空间集聚特征,综合耕地质量及其连通特征划定永久基本农田。结果表明:从耕地综合质量来看,兴国县耕地质量由高到低划分为4个质量等级,面积分别为6 204.95、16 031.72、19 321.79、3 573.76 hm^(2),占总耕地面积的13.75%、35.52%、42.81%、7.92%。总体来看,兴国县中等质量耕地居多,占比为78.33%。从耕地连通性来看,兴国县耕地连片程度由高到低划分为5个等级,其中一级~五级连片耕地面积分别为24 731.44、6 199.73、3 131.54、7 397.71、3 671.80 hm^(2),分别占耕地总面积的54.80%、13.73%、6.94%、16.39%、8.14%,耕地存在不同程度破碎化。将耕地质量三等以上、连片程度四级以上耕地划入基本农田,面积为37 029.62 hm^(2),占耕地总面积的82.05%,与原有划定基本农田相比,实现了划定后永久基本农田“总体稳定、布局优化、质量有提升”的目标。展开更多
目的探讨床旁超声联合肠内营养耐受性评分指导老年出血性脑卒中患者营养支持治疗的效果。方法采用随机数字表法将80例老年出血性脑卒中患者分为对照组(n=40)和研究组(n=40)。对照组根据肠内营养耐受评分指导肠内营养支持治疗。研究组根...目的探讨床旁超声联合肠内营养耐受性评分指导老年出血性脑卒中患者营养支持治疗的效果。方法采用随机数字表法将80例老年出血性脑卒中患者分为对照组(n=40)和研究组(n=40)。对照组根据肠内营养耐受评分指导肠内营养支持治疗。研究组根据床旁超声获取胃窦运动指数(motility index,MI)和胃残余量,根据MI和肠内营养耐受评分共同指导肠内营养支持治疗。比较两组患者7d肠内营养喂养热量、目标喂养达标率、肠内营养并发症情况以及入院时、住院第5天和第10天营养指标、美国国立卫生研究院卒中量表(national institute of health stroke scale,NIHSS)评分、格拉斯哥昏迷量表(Glasgow coma scale,GCS)评分。结果研究组患者7d肠内营养喂养平均热量和7d内目标喂养达标率分别为(72.05±12.18)kJ/(kg·d)和90.0%,对照组分别为(60.74±14.92)kJ/(kg·d)和70.0%,研究组显著高于对照组(P<0.05)。研究组患者达目标喂养时间、喂养不耐受中断次数分别为(72.43±16.58)h和(1.75±0.35)次,对照组分别为(92.18±24.84)h和(3.17±0.85)次,研究组显著少于对照组(P<0.05)。研究组住院第5天和第10天时血清总蛋白(total protein,TP)、白蛋白(albumin,Alb)和前白蛋白(prealbumin,PA)水平均显著高于对照组(均P<0.05)。研究组住院第5天和第10天时NIHSS评分显著低于对照组,GCS评分显著高于对照组(均P<0.05)。研究组胃肠道并发症总发生率显著低于对照组(P<0.05)。结论依据床旁超声联合肠内营养耐受性评分制定个体化肠内营养支持方案,能够显著缩短老年出血性脑卒中患者达目标喂养时间,减少肠内营养并发症,改善营养状态,减轻神经功能损伤,改善预后。展开更多
基金supported by the Humanities and Social Sciences Program of Jiangxi Universities(Grant No.GL21129)the Graduate Student Innovation Fund Program of Gannan Normal University(Grant No.YCX23A043)the Open Subject of Geography Discipline Construction of Gannan Normal University(Grant No.200084).
文摘With rapid economic development,the size of urban land in China is expanding dramatically.The Urban Growth Boundary(UGB)is an expandable spatial boundary for urban construction in a certain period in order to control the urban sprawl.Reasonable delineation of UGB can inhibit the disorderly spread of urban space and guide the normal development of the city.It is of practical significance for the construction of green urban space.The study utilizes GIS technology to establish a land construction suitability evaluation system for Nankang city,which is experiencing rapid urban expansion,and outlines the preliminary UGB under the future land use simulation(FLUS)model.At the same time,considering the coupled coordination of"Production-Living-Ecological Space",and based on the suitability evaluation,we revised the preliminary UGB by combining the advantages of the patch-generating land use simulation(PLUS)model and the convex hull model to delineate the final UGB.The results show that:1)the comprehensive score of the evaluation of the suitability of the construction of land from high to low shows the distribution of the center of the city to the surrounding circle type spread,the center of the city has the highest suitability score.The results of convex hull model show that the urban expansion type of Nankang is epitaxial.In the future,the urban expansion will mainly occur in the northern part of the city.The PLUS model predicts an increase of 3359.97 hm^(2)of construction land in Nankang by 2035,of which 2022.97 hm^(2)is urban construction land.2)The FLUS model has a prediction accuracy of 86.3%and delineates a preliminary UGB area of 9215.07 hm^(2).3)We used the results of the construction suitability evaluation,PLUS model simulation results,and convex hull model predictions to revise the originally delineated UGB.The final delineated UGB area is 8895.67 hm^(2)and it is capable of meeting the future development of the study area.The results of the delineation can promote sustainable urban development,and the delineation methodology can provide a reference basis for the preparation of territorial spatial planning.
文摘保护集中连片的优质耕地对于保障国家粮食安全具有重要意义。本文以江西省兴国县为例,从耕地的自然质量、立地条件、生态条件3个层面系统构建耕地综合质量评价指标体系;基于TOPSIS(Technique for order preference by similarity to an ideal solution)综合评价法对耕地综合质量进行评价,引入耕地连片度、耕地空间连通格局分析了耕地空间集聚特征,综合耕地质量及其连通特征划定永久基本农田。结果表明:从耕地综合质量来看,兴国县耕地质量由高到低划分为4个质量等级,面积分别为6 204.95、16 031.72、19 321.79、3 573.76 hm^(2),占总耕地面积的13.75%、35.52%、42.81%、7.92%。总体来看,兴国县中等质量耕地居多,占比为78.33%。从耕地连通性来看,兴国县耕地连片程度由高到低划分为5个等级,其中一级~五级连片耕地面积分别为24 731.44、6 199.73、3 131.54、7 397.71、3 671.80 hm^(2),分别占耕地总面积的54.80%、13.73%、6.94%、16.39%、8.14%,耕地存在不同程度破碎化。将耕地质量三等以上、连片程度四级以上耕地划入基本农田,面积为37 029.62 hm^(2),占耕地总面积的82.05%,与原有划定基本农田相比,实现了划定后永久基本农田“总体稳定、布局优化、质量有提升”的目标。
文摘目的探讨床旁超声联合肠内营养耐受性评分指导老年出血性脑卒中患者营养支持治疗的效果。方法采用随机数字表法将80例老年出血性脑卒中患者分为对照组(n=40)和研究组(n=40)。对照组根据肠内营养耐受评分指导肠内营养支持治疗。研究组根据床旁超声获取胃窦运动指数(motility index,MI)和胃残余量,根据MI和肠内营养耐受评分共同指导肠内营养支持治疗。比较两组患者7d肠内营养喂养热量、目标喂养达标率、肠内营养并发症情况以及入院时、住院第5天和第10天营养指标、美国国立卫生研究院卒中量表(national institute of health stroke scale,NIHSS)评分、格拉斯哥昏迷量表(Glasgow coma scale,GCS)评分。结果研究组患者7d肠内营养喂养平均热量和7d内目标喂养达标率分别为(72.05±12.18)kJ/(kg·d)和90.0%,对照组分别为(60.74±14.92)kJ/(kg·d)和70.0%,研究组显著高于对照组(P<0.05)。研究组患者达目标喂养时间、喂养不耐受中断次数分别为(72.43±16.58)h和(1.75±0.35)次,对照组分别为(92.18±24.84)h和(3.17±0.85)次,研究组显著少于对照组(P<0.05)。研究组住院第5天和第10天时血清总蛋白(total protein,TP)、白蛋白(albumin,Alb)和前白蛋白(prealbumin,PA)水平均显著高于对照组(均P<0.05)。研究组住院第5天和第10天时NIHSS评分显著低于对照组,GCS评分显著高于对照组(均P<0.05)。研究组胃肠道并发症总发生率显著低于对照组(P<0.05)。结论依据床旁超声联合肠内营养耐受性评分制定个体化肠内营养支持方案,能够显著缩短老年出血性脑卒中患者达目标喂养时间,减少肠内营养并发症,改善营养状态,减轻神经功能损伤,改善预后。
