Tectono-geochemical Characteristics at the level 1584m in Huize Zinc-Lead Deposit,Yunnan Province

1 Introduction The Huize Zn-Pb district is located in the tectonic composite position,became one of the important production areas of zinc,lead and germanium in China.In the Huize lead-zinc deposit,the interlayer faults are most

Predicting urbanization level by main element analysis and multiple linear regression---taking Xiantao district in Hubei Province as an example

In this paper we firstly select main factors relating to urbanization level of Xiantao District in Hubei Province by main element, then, make model of urbanization level by analysis of multiple liner regression, and lastly predict its urbanization level

Relation between Economic Development Level and Resource and Environment Carrying Capacity of Central Area of Yunnan Province Based on Decoupling Analysis

Based on the decoupiing theory and method, an indicator system was built for the relation between economic development level and resource and environment carrying capacity. And the study was carried out on decoupling degree and temporal changes of economic development level and resource and environment carrying ca- pacity in the central area of Yunnan Province. Results indicated that （i） the economic development level and resource and environment carrying capacity in the central area of Yunnan Province mainly experienced strong decoupling, weak decoupling, and ex- pansive negative coupling, and in general it was strong decoupling, and it took on re- verse ＂N＂ in temporal changes. （ii） Change rate of economic development level in the central area of Yunnan Province was greater than zero, but the amplitude of change was not large, while the change rate of resource and environment carrying capacity was negative in 2007-2008, and it was positive in the rest years; from 2007, it took on gradual expansion trend, and scissors difference gradually increased after experi- encing reverse ＂V＂ change. （iii） The strong decoupling was the main situation and it reached the peak value in T5 period and T6 pedod.

Variations of Frost-free Period and Its Impact on Grain Yields in Henan Province during 1961-2013

The aim of this study was to investigate the responses of frost dates to global warming and its influences on grain yields. In this study, based on the frost date series defined by daily minimum ground temperature, the spatial and temporal characteristics of first frost date （FFD）, last frost date （LFD） and frost-free period （FFP） were analyzed. The impact of extending FFP on major crop yields was also studied. The results were as follows： FFD showed a significantly delaying trend of 2.2 d/10 y, and LFD presented an advancing trend of 2.4 d/10 y. FFP extended at a rate of 4.5 d/10 y due to the later FFD and earlier LFD. The most obvious trend of FFD was in westem Henan, while the most significant trend of LFD and FFP oc- curred in south central parts of the study area. However, in eestem region, the trends of FFD, LFD and FFP were not so obvious. Major crop yield showed a sig- nificant correlation with frost-free period for Henan during 1961-2013. The yields of grain, rice, wheat, and maize increased by 79.5, 90.0, 79.5 and 70.5 kg/hm2 with FFP extending by one day.

基于AHP-TOPSIS方法的智慧旅游发展水平指标体系建构与实证研究

智慧旅游是旅游融入互联网时代的新业态,是旅游高质量发展、提高游客满意度的重要抓手。基于我国智慧旅游发展促进政策及现有文献,研究构建智慧旅游发展水平指标体系,采用层次分析法(AHP)与优劣解距离法(TOPSIS)对云南16个州市智慧旅游发展水平进行实证。研究发现:云南省智慧旅游发展水平区域差异明显,总体上可分为较高、中等和较低发展水平,呈现出以昆明为中心,向周边州市降低的阶梯分布格局。通过综合分析,提出促进智慧旅游发展的对策建议:(1)加大政策扶持力度,激发智慧旅游主体活力;(2)凝炼云南经验,共享旅游数字化转型升级成果;(3)统筹规划智慧旅游体系建设,提升旅游智慧化水平,以期为推进我国旅游数字化、智慧化建设提供借鉴。

Geography and Rural Household Income:A Village Level Study in Henan Province,China

This study uses the data from a sample survey conducted in April 2007 on 1 251 rural households in 11 villages of Henan Province, the largest less developed agricultural province in China, to examine how geography affects rural household income （RHI）. The quantitative analysis indicates following results. I） The significance of the traditional geographical factors reduces as RHI rank increases. 2） The landform does not affect the RHI significantly. The per capita income of rural household in a plain area is lower than that in a mountainous area. And 3） the capital endowment and status of non-farm economic activities contribute to the increase of RHI. But the probability and intensity of non-farm economic activities of rural households in urban outskirts villages are higher than that in non-urban outskirts villages. Based on the results, the paper further concludes that geography still plays a significant role in rural development, but it is changing over time. The agricultural resources （such as per capita arable land） significantly affect RHI with the relatively lower income level, while the geographical location shows a more significant impact on RHI with the relatively high income level. Along with economic development, the proximity replaces the traditional geographical factors such as landform and physical resources as the major determining factor in RHI.

Path of Rural Vitalization Based on Coupling Perspective of Township Construction and Resource Environment in Jiangsu Province,China

Recently,the field of rural vitalization has received extensive research attention.However,only few studies have proposed an approach to rural vitalization from the coupling perspective of township construction and the resource environment.Taking Jiangsu Province of China as the study area,we constructed index systems of township construction function types and resource environments.Based on 875 township study units in Jiangsu,we characterized the township construction function type and resource environment and analyzed the dynamic process of their coupling from 2005 to 2017.The results are as follows:1)the townships of planting and breeding types in Jiangsu were mainly distributed in northern and central Jiangsu;the townships of business travel,industry,and integrated types were mainly distributed in southern Jiangsu;and the townships of ecological type were irregularly distributed throughout Jiangsu.2)Resource environment factors and township construction function types in Jiangsu clustered based on their location with some overlap.3)Spatial variability in the degree of coupling level between township construction and the resource environment in Jiangsu was not apparent,and low coupling levels accounted for most of the study units.The sum of the number of medium and high coupling townships in southern,central,and northern Jiangsu was roughly equal,and the coupling level between township construction and the resource environment in southern Jiangsu evolved remained unchanged,whereas that in the central and northern Jiangsu became imbalanced.4)In Jiangsu,township construction was mainly constrained by water resources,and the constraint parameters gradually increase.Large variability in resource environment constraint was observed in northern,central,and southern Jiangsu for different township construction function types.Based on these findings,we proposed the implementation of targeted rural vitalization strategies.

Holocene sea level changes and coastline snitts in Zhejiang Province, China

In the present paper, the Holocene sea level changes and coastline shifts in Zhejiang, China are discussed, based on the ancient coastline evidence related with sea level changes and 21 14C dat-ings of shell, peat or mud and wood samples along the Zhejiang coast. The development of Zhejiang coastline during the Holocene period can be divided into four stages. A lot of data of historical period and modern times have shown that tracing coastline shifts back to its source, we have to consider tremendous effects of man's activities besides natural factors, such as elevation and subsidence of the earth crust, sea level changes, supply of sediment, and littoral hydrodynamics.

基于“等级-网络”双维度下的福建省县级单元对外服务能力空间格局演化

基于城市流强度模型和改进的引力模型,从“等级-网络”双维度下的对外服务能力空间关系,开展福建省县级单元对外服务能力格局演变的分析。结果表明:(1)第二、三产业对外服务能力均持续增强的同时,工业与商务商贸成为职能部门的“双子星”。(2)对外服务能力空间格局整体表现出沿海高于内陆的特征,各职能分工定位与发展态势逐步明晰。(3)对外服务能力网络格局中第二、三产业勾勒出以沿海高等级联系为主导并向内陆辐射延展的放射状网络;工业职能部门在内陆与沿海分别形成倒“T”型与“钻石型”主干网络。

Study on the background level of selenium in soils and its sources,Guizhou Province

The contents of selenium in soil samples from Guizhou Province, which cover an area of 17.6×104 km2, have been determined. The arithmetic mean value of 947 samples is 0.39 mg/kg, the medium value is 0.30 mg/kg and the contents of selenium vary from 0.06 to 1.29 mg/kg in soils developed on the basement rocks, which are controlled by the basement rocks themselves.

基于北斗/GNSS-R的厘米级水位测量

水位变化监测是防洪抗旱的重点工作之一,全球导航卫星系统反射测量(Global Navigation Satellite System-Reflectome‐try,GNSS-R)技术已被证明可进行高精度、全天候、全天时的水位变化监测。我国北斗卫星导航系统(Beidou Navigation Satellite System,BDS)拥有丰富的频段数据,在GNSS-R遥感应用领域中具有广阔的应用前景。基于湖南省浏阳河流域建设的GNSS-R实验观测站数据,进一步研究了BDS在水位反演中的性能,分别采用频谱分析法和非线性拟合法对站点水位变化进行测量,并将实验结果与附近水文站的实测数据进行对比分析。结果表明,非线性拟合法相较于频谱分析法,水位测量精度大幅提升,均方根误差(RMSE)平均降低了66%,且多频数据融合后RMSE达到了1.8 cm,整体上BDS的水位反演性能与GPS相当。

Discovery and features of vertical zonations of tidal salt-marsh foraminifera in Jianchuan, North Jiangsu Province, China

Through densified surface sampling of foraminifera and accurate elevation measurement a-long three transect lines in open-coast tidal salt-marsh of Jianchuan, particular salt-marsh foraminifera assemblages were found. The salt-marsh foraminifera assemblages are distributed in well-defined vertical zonations with respect to elevation and closely parallel marsh floral zonations. At the top of the vertical zonation all foraminifera disappear abruptly which are accurately located at the highest high water datum. This distribution pattern can be used to relocate former sea levels accurately (to an accuracy of within ±5 cm). A modern regional criterion of foraminifera for relocating the former sea levels in high resolution in our country is provided, and deficiencies of studying the vertical zonation only in sheltered coast salt-marsh abroad are filled up.

Vulnerability Assessment of Climate Change on Sea Level Rise Impacts on Some Economic Sectors in Binh Dinh Province, Vietnam

Assessing the vulnerability for some economic sectors of Binh Dinh province plays a very important role. The study has applied the vulnerability method according to Iyengar and Sudarshan to assess vulnerability for 03 different sectors: 1) Agriculture, forestry and fisheries;2) Industry and construction and 3) Service. Calculation results of vulnerability classification for different sector groups according to the E, S, AC, and Vi indicators are used to develop a hierarchy of vulnerability classification for different sector groups. The calculation results indicate that only Phu My district has a high vulnerability index for agriculture, forestry and fisheries with the value of Vi?= 0.6;For the service sector, only Quy Nhon City has a high vulnerability index with the value of Vi?= 0.63. The vulnerability index calculated for sector groups for the remaining regions is low to moderate. The result of the vulnerability classification maps due to sea level rise will help planners and managers make plans, plans and solutions to mitigate risks caused by natural disasters.

Evaluation of Farmer Training Satisfaction Level in Hubei Province

Based on fully understanding the significance of farmer training,this paper builds the evaluation index system for farmer training satisfaction level. Then this paper employs the field survey data about Yichang and Jingzhou in Hubei Province to evaluate the farmer training satisfaction level in Hubei Province. Results show that farmers have high level of satisfaction on agricultural training in Hubei Province,and the average satisfaction level reaches 0. 8556; there are regional differences in the farmer training satisfaction level in Hubei Province; the index weight is not entirely directly proportional to the training satisfaction level in the evaluation index system. Finally,from training courses,training teachers,training organization and follow-up services,this paper brings forward the recommendations for improving farmer training satisfaction level in Hubei Province,improve farmer training system,further improve the effectiveness of training and promote farmers' quality.

Economic and Financial Structural Adjustment at Village Level: A Case Study of Rural Areas in Guizhou Province

Village-level economy is not only the important foundation for promoting grass-roots agricultural and rural modernization, but also an essential guarantee for sustainable development of small scale economy of rural farmer households. Research on this field will play a significant role in rural economic development of Guizhou Province. Taking the observation data from 1999 to 2009 in 10 fixed observation villages in Guizhou Province, we carried out empirical survey and analysis on land scale and use structure, scale and composition of fixed assets for production, level and composition of operational income, and level and composition of financial revenue and expenditure at village level. Finally, we put forward conclusions and recommendations.

河南省沿黄地级市水-能源-粮食系统耦合协调发展研究

为探究河南省沿黄地级市水-能源-粮食(W-E-F)系统耦合协调发展状况,基于2007—2021年沿黄9个地级市面板数据,建立W-E-F系统综合评价指标体系,采用组合赋权法进行测度,并借助耦合协调度模型,从时空角度对河南省沿黄地级市W-E-F系统进行评价。结果表明:从时间上看,河南省沿黄地级市W-E-F系统综合评价指数稳定上升,水资源子系统评价指数波动最大;W-E-F系统耦合协调度2008年最低(0.536),2020年最高(0.850),研究期分勉强协调发展、初级协调发展、中级协调发展和良好协调发展4种类型;从空间上看,W-E-F耦合系统综合评价指数最高的是洛阳(0.567),最低的是焦作(0.394);河南省沿黄9个地级市W-E-F系统耦合协调度均值大多数为初级协调发展及中级协调发展类型,地区间差异性明显。

LEVEL SET输运方程的求解方法及其对气-液两相流运动界面数值模拟的影响

用数值模拟方法来研究气-液两相流动与传热现象是当今多相流领域的一个热门课题。由于两相流固有的复杂性,气-液两相流界面迁移现象的数值模拟一直是两相流研究中的一大难点。本文介绍了捕捉气-液两相流相界面运动的水平集方法(LevelSet)及其研究进展,介绍了求解LevelSet输运方程的3种方法,即一般差分格式、Superbee-TVD格式和Runge-Kutta法-5阶WENO组合格式。结合主流场的求解,分别用这3种方法对4种典型相界面在5种流场中的迁移特性进行了模拟计算,并对计算结果进行了比较和分析。结果表明,Runge-Kutta法-5阶WENO组合格式求解LevelSet输运方程的效果最好,在以后的计算中将主要采用这种组合格式来进行气-液相界面输运方程的求解。

基于DEA-Malmquist指数的江苏省三级甲等公立中医医院运行效率研究

目的:研究2018—2020年江苏省三级甲等公立中医医院(三甲公立中医院)运行效率状况,为改善中医院医疗服务效率提供参考。方法:基于2018—2020年江苏省卫生资源与医疗服务调查内部资料,运用DEA-Malmquist指数法分析2018—2020年江苏省三甲公立中医院全要素生产率。结果:2018—2020年,江苏省三甲公立中医院综合效率均值为0.965,纯技术效率均值为0.986,规模效率均值为0.977;2018—2020年江苏省三甲公立中医院全要素生产率变化指数上升27.80%,技术效率变化指数上升2.60%,技术变化指数上升23.80%,纯技术效率变化指数上升1.90%,规模效率变化指数上升0.60%。结论:样本期内江苏省三甲公立中医院运行效率呈下降趋势;区域间三甲公立中医院全要素生产效率存在差异,而技术进步是推动全要素生产率提高的关键因素。须激活三甲公立中医院发展新动力,推动全要素生产效率提升。

城市公共体育设施配置水平及与社会经济关系研究-以浙江省为例

在区域层面实现城市公共体育设施的均等化供给事关居民生活质量和社会公平。文章借助多指标综合评价法、空间分析法和耦合协调度模型,对浙江省89个区县的城市公共体育设施配置水平展开研究,得到以下结论:总体上浙江省城市公共体育设施配置为橄榄形状分布,呈现“市辖区县级市一般县”的特征;不同等级城市公共体育设施配置水平分布具有协同性,并呈现多中心极化的空间分布特征,而不同类型城市公共体育设施配置水平空间分布差异化显著;各区县城市公共体育设施配置水平在全局上具有显著的空间相关性,高水平扩散区域主要分布在环杭州湾地区,中西部地区多为发展起步区域。城市公共体育设施配置水平与人口空间分布具有较强的相关性,与经济发展水平间的耦合协调度呈现由东北向西南递减的空间特征。

A new feasible method for yield gap analysis in regions dominanted by smallholder farmers, with a case study of Jiangsu Province, China

In the regions where crops were mostly produced by smallholder farmers, the analysis of yield gap is difficult due to diverse cultivars, crop managements and yield levels. In order to find an effective method that can reasonably verify the yield gap and the limiting cultivation factors in narrowing yield gaps in areas that are dominanted by smallholder farmers, we worked out a method consisting five progressive procedures as follows: questionnaire investigation of farmer cultivation regime, identification of yield levels and yield gaps, generalization of key cultivation measurements, reconstruction of representative maize populations, and process-based analysis of yield gap. A case study was carried out in Jiangsu Province, China, in which maize is mostly produced by smallholder farmers. A questionnaire investigation of 1 023 smallholder farmers was carried out firstly, then the frequency distribution of maize yield was simulated by an normal distribution function, and then the covering range and average value of the basic yield, farmer yield and high-yield farmer yield levels were calculated out from the equation. Hereby, the yield gaps 1, 2 and 3 were calculated along with the record highest yield from literature and experts, which were 2 564, 2 346 and 2 073 kg ha^(–1), respectively. Moreover, with the covering range of each yield level, the suveyed farmers belonging to each yield level were grouped together and then their major cultivation measures were traced and generalized. With the generalized cultivation measures, representative maize populations of the four yield levels were reconstructed, and thereby clarifing lots of characters of the populations or single plant of each population with processbased analysis of the reconstructed populations. In this case, the main factors causing the yield gap were plant density, fertilizer application rate, logging caused by hurricane, and damages caused by pests. The case study primarily indicated that this five-step method is feasible and effective in yield gap study, especially in smallholder farmers dominant regions.