Spatiotemporal Evolution and Influencing Factors of Urban-rural Construction Land in Rural Industrialized Areas in China:Case Studies in Changyuan City and Xinxiang County of Henan Province

Since China’s reform and opening up in 1978,the acceleration of industrialization and urbanization in China had led to dramatic changes in the pattern of urban-rural land use.In this paper,we focused on the rural industrialized areas in central China(Xinxiang County and Changyuan City of Henan Province).We used the average nearest neighbor index,spatial statistical analysis,and a structural equation model to analyze the spatiotemporal evolution and influencing factors of urban-rural construction land based on multisource spatial data and survey data.The results showed that:1)from 1975 to 2019,the spatial distribution of urban-rural construction land in rural industrialized areas had evolved from homogeneous distribution to local agglomeration.In terms of comparative analysis of cases,the spatial distribution of urban-rural construction land in Changyuan City had shown a trend from diffusion to agglomeration,and Xinxiang County had overall shown a spatial change from homogenization to agglomeration and then to regional integration development.2)The hot spots with increased urban-rural construction land significantly expanded,and they had a high degree of spatial overlap with industrial development.Among them,Xinxiang County was concentrated in central and marginal areas,and Changyuan was mainly concentrated in central urban areas.3)From the evolution of spatial proximity of urban-rural construction land,rural industrialized areas generally decline,showing the characteristics of internal differentiation in the rate of change.4)Industrial development,social economy,the policy environment,and urban development played a positive role in promoting the expansion of urban-rural construction land in rural industrialized areas.To promote the optimal use of regional land and the integrated development of urban-rural areas,we should combine the advantages of regional endowment,formulate development strategies according to local conditions,and adjust the way that land is used in a timely manner.

Soil quality and sustainable land use in urban-rural marginal area: a case study of Kaifeng

By using the basic theories of physical geography, land resources and ecology, this article analyzes the soil quality of the rural-urban marginal area in Kaifeng. Computer techniques, based on soil samples analysis, are used to study soil quality changes in the Kaifeng’s rural-urban marginal area. While focusing on nutrient circle key links of input and output in soil, relying on numerous practical survey data, this article reveals clearly the impact of land use change on soil quality.

SUSTAINABLE URBAN-RURAL RELATION IN RAPID URBANIZATION AREAS——Case of Transformation of "Urban Village" in Guangzhou

Many studies have been made concerning the problems, characteristics, formation, transformation measures, etc. of urban village from sociology, urban planning and geography, etc., which have made insightful analysis. However, most of these studies started mainly from the standpoint of the city govemment, drumming for the land- scape-oriented urbanization, namely pulling-down the urban village and constructing the splendid residence or business buildings. The article maintains that the most important thing the city government should do is to pay much attention to the sustainable living of urban villagers, who would lose their main income source, namely, the collective dividend and the family housing rent. The single method of compensation has been proved to be harmful to the villagers＇ community, in which some young villagers relying on rent were no longer to do anything but stay at home. On the other hand, considering the floating population has become the main stream of renters in urban villages, the emergence of urban villages was inevitable and would continue to exist in a long time under the socio-economic transition in urban China and globalization. Based on the analysis above, the transformation of urban village should take more concerns on the housing demands of floating population besides compensation for local villagers. Meanwhile, it is necessary to avoid the “landscape-oriented urbanization” without the “peasant-to-citizen” transformation.

An investigation of the health value and self-care capabilities of the elderly in urban-rural fringe area nursing homes and the related in？uencing factors

Objective：To investigate the health value and self-care capabilities of the elderly living in urban-rural fringe area nursing homes and the factors that influence these variables.Methods：A cluster sampling method was used to select 280 elderly individuals from seven urban-rural fringe communities in Xianning to complete a survey regarding their health value and self-care capabilities.Results：The total health value and self-care capability scores of the elderly were 7.45 ± 1.45 and100.25±22.56,respectively.Both of these scores significantly differed by age,education level,marital status,and income（P 〈 0.05,P 〈 0.01）.Self-care capability was correlated with health value（r=0.521）.A multivariate linear regression analysis showed that health value,marital status,and age predicted selfcare capability.Conclusions：Elderly people living in the urban-rural fringe area with higher health values also had higher self-care capabilities.The self-care capabilities of the elderly can be enhanced by improving their health value using the ＂knowing-trusting-acting＂ model.

Overall Planning of Development of Urban-Rural Areas:A Policy Mechanism for Urban-Rural Coordinated Growth

While analyzing overall planning and coordinated development of urban-rural areas, this paper shows that overall planning for the development of urban-rural areas is a requirement for the best use of productive forces. It means the setting up of a policy mechanism for coordinated growth. Recognizing this, the government should set up a way to lead and manage a unified program to increase service and decrease controlling administration power, while safeguarding and fulfilling the farmers' ownership to the means of production.

Hydrocarbon migration and accumulation along the fault intersection zone-a case study on the reef-flat systems of the No.1 slope break zone in the Tazhong area, Tarim Basin

Understanding hydrocarbon migration and accumulation mechanisms is one of the key scientif ic problems that should be solved for effective hydrocarbon exploration in the superimposed basins developed in northwest China. The northwest striking No.1 slope break zone, which is a representative of superimposed basins in the Tarim Basin, can be divided into five parts due to the intersection of the northeast strike-slip faults. Controlled by the tectonic framework, the types and properties of reservoirs and the hydrocarbon compositions can also be divided into five parts from east to west. Anomalies of all the parameters were found on the fault intersection zone and weakened up-dip along the structural ridge away from it. Thus, it can be inferred that the intersection zone is the hydrocarbon charging position. This new conclusion differs greatly from the traditional viewpoint, which believes that the hydrocarbon migrates and accumulates along the whole plane of the No.1 slope break zone. The viewpoint is further supported by the evidence from the theory of main pathway systems, obvious improvement of the reservoir quality （2-3 orders of magnitude at the intersection zone） and the formation mechanisms of the fault intersection zone. Differential hydrocarbon migration and entrapment exists in and around the strike- slip faults. This is controlled by the internal structure of faults. It is concluded that the more complicated the fault structure is, the more significant the effects will be. If there is a deformation band, it will hinder the cross fault migration due to the common feature of two to four orders of magnitude reduction in permeability. Otherwise, hydrocarbons tend to accumulate in the up-dip structure under the control of buoyancy. Further research on the internal fault structure should be emphasized.

On the modes of urban-rural networking development in China

This essay tries to reveal the developmental regularity of urban-rural networking manifested by urbanization. The urban-rural networking is a reality and an inexorable trend of development. As a physical existence, the urban-rural networking reflects a result of the interaction between cities and rural areas; it is a necessary and sufficient condition for sustaining progress of cities and rural areas. As an objective developmental tendency, it reflects an urban-rural regional economic process. The author briefly analyzes two contradictory urban-rural developmental views, and puts forward a concept of the mode of urban-rural networking development. The author also analyzes the mode from the perspectives of economics and philosophy.

How to Draw on the Urban-rural Space Evolution Experience of Foreign Metropolis for Xi'an?

"Space" is the place where people take social and economic activities,as well as the carrier supporting any public life style and rights and acts.Urban and rural places are the two main parts that comprise the regional economic system,and only when they are developed harmoniously can the overall economic optimization and social welfare maximization come true.On basis of analyzing the experience and mechanism of urban and rural spaces of London,New York and Tokyo 3 typical international metropolitan area and learning from their development experience,the study has proposed development strategies for the integration of urban-rural space of Xi'an City according to its current development situation.

A Statistical Analysis on Tidal Triggering of Earthquakes in the Kashi-Wuqia Intersection Area in Xinjiang

A statistical analysis on earthquake activity in the Kashi-Wuqia intersection area triggered by earth tide is done by Schusters test and the Permutation test on daily and monthly scales. The north-south,east-west component of the tidal force and tidal body stress are chosen as the tidal curve in the daily scale. The results show that most of the earthquakes occurred near the maximum 0° of the three kinds of tidal curves,the predominant tidal phases of the earthquake are- 5. 86°,6. 60° and- 15. 52°,and the frequency of the earthquakes increases with the increase of the tide; with three kinds of tidal curves( the north-south,east-west component of the tidal force and tidal body stress),the p S of Schusters test for all the earthquakes is 10. 52%,2. 40% and 2. 06%,and the p P of the Permutation test is 10. 90%,2. 40% and 2. 06%,and the results of p S and p P based on the east-west component of the tidal force and tidal body stress are below the threshold of 0. 05 that tidal triggering of earthquakes. In the monthly scale,both the p S and p P are very low( close to 0),far below the threshold of 0. 05 of tidal triggering of earthquakes,and the predominant tidal phase for earthquake triggering is- 18. 95°,close to the maximum 0°( new moon and full moon) of the earth tide in monthly scale. Regarding the statistical test result of tidal triggering of earthquakes,a preliminary explanation is given as to why the trigger effect in the east-west direction is greater than that in north-south direction.

幼童脑干形态学与增龄发育的数字化特征

背景:既往对脑干研究多集中于成人和胎儿,而对国人幼童脑干的增龄发育特征研究甚少。目的:观测健康幼童脑干发育特征,探究其增龄差异及其与性别间的相关性。方法:2019年1月至2022年4月对内蒙古医科大学附属医院174例2-6岁幼童颅颈部3.0T MRI图像行回顾性研究,测量脑干(含中脑、脑桥、延髓)正中矢状面径线、面积和角度。结果与结论:中脑、脑桥、延髓前后径在2-5岁组,中脑、脑桥、延髓纵径和面积在2-6岁组总体随增龄呈递增趋势,除延髓纵径外均呈正相关(r>0,P<0.05),在2-3岁组、4-5岁组期间处于快速生长发育阶段,这2个年龄组可作为幼童发育重点观测指标;脑桥前后径、纵径、面积和脑干总面积与年龄相关性较强,可作为其脑干发育重点观测指标。

机场终端区晴好天气容量评估方法的初步研究

在我国航空运输需求迅速增长,运营压力激增的背景下,采用适当的容量评估模型对于繁忙机场的理论容量研究和机场运行规划具有重要意义。以最大流最小割定理为基础,建立了进离场航段容量模型和交叉点容量模型,并选择西安咸阳机场进行仿真验证。研究结果表明,该模型能够高度准确地预测机场容量,其预测结果接近实际运行最大小时流量的105%~110%。表明该模型在终端区容量评估方面具有出色的精确性,特别适用于晴朗天气条件下的情况。这一研究为机场管理者提供了强大的决策工具,有助于更有效地满足不断增长的航空交通需求,确保机场运行的高效性和安全性。

深孔钻导向条与孔壁挤压作用对钻孔偏斜的影响分析

深孔加工应用领域广泛,作为评定深孔加工的重要指标,钻孔偏斜量的优劣直接决定深孔件加工质量。为了研究深孔加工过程中深孔刀具系统对孔轴线偏斜量的影响,综合考虑中弱刚度钻杆弯曲效应和导向条对孔壁接触挤压作用,基于直梁弯曲位移理论和弹塑性力学的曲面赫兹接触理论,建立导向副接触模型。通过导向副接触模型分析钻削深度对导向副接触区域的影响,试验证明,建立的理论模型所得结果与钻削试验结果基本一致。

城市核心区道路交叉口交通组织优化与评估

城市核心区道路交叉口畅通是城市路网系统高效运营的关键。本文选取新一线城市佛山顺德区核心区域的兴顺路与京珠线交叉口为研究对象。在对区域交通现状实地调查调查的基础上,采用饱和度评价、平均延误评价、最佳信号周期评价等研究方法,对兴顺路与京珠线交叉口的交通组织进行优化设计,从交叉口的渠化、信号配时等方面,提出了交叉口北进口处设置待转区和交叉口北进口处设置借道左转的2种方案,通过对方案进行评估和比较,最终确定交叉口北进口处设置借道左转的方案更优,以此为佛山市核心道路交叉口的交通优化提供参考和借鉴。

西藏自治区自然保护地空间特征研究

以西藏自治区现有6种类型共102处自然保护地为研究对象,采用地理集中指数、不平衡指数、最邻近点指数和核密度估计的方法对自然保护地空间特征进行定性和定量分析研究。结果表明,西藏自治区自然保护地具有聚集分布的特点,交叉重叠区域呈藏西阿里高原山地区、藏东南高山深谷区交叉重叠面积大,藏中雅江流域交叉重叠数量多的特点,在重叠类型上,自然保护区与自然公园的重叠是最为普遍的重叠类型。对西藏自治区自然保护地空间分布格局评价结果,生态区位重要,保护价值高,总体布局基本合理,仍有优化空间,提出推进国家公园建设,完善保护体系,优化空间布局等建议。

基于车辆行驶特征的左弯待转区精细化研究

针对左弯待转区存在许多施划不合理的情况,为研究合理的施划方法,首先借助Tracker运动软件提取车辆轨迹坐标和车速,然后分析左转车辆的行驶特征,拟合出典型转弯半径和典型车速,经验证拟合结果处在规范合理区间。根据拟合结果对交叉口左弯待转区进行优化,根据优化前后对比证明优化后的轨迹更合理。

长江与嘉陵江交汇区特征汇流比水生指标分布

采用三维水流数学模型,分析长江与嘉陵江交汇区特征汇流比下的水力生境指标分布特性,结果表明:(1)鱼类生长期和繁殖期下的沿程水位变化特征相似,交汇口水体挤压产生壅水,交汇口下游河道形成回流区,流体脱离交汇区后受到左岸侧碍航外梁影响,流体被压缩至右岸形成高速主流区,研究区域整体流速呈现左低右高趋势。(2)交汇前鱼类适宜栖息地均匀分布于河道深槽中下层,分布面积随流量增大而增大;交汇后鱼类适宜栖息地主要分布于干流深槽水体中下层及右侧边滩,随着流量增大,适宜区域向河床及右侧边滩转移。

Analysis of occupation time of vehicles at urban unsignalized intersections in non-lane-based mixed traffic conditions

In India, traffic flow on roads is highly mixed in nature with wide variations in the static and dynamic characteristics of vehicles. At unsignalized intersections, vehicles generally do not follow lane discipline and ignore the rules of priority. Drivers generally become more aggressive and tend to cross the uncontrolled intersections without considering the conflicting traffic. All these conditions cause a very complex traffic situation at unsignal- ized intersections which have a great impact on the capacity and performance of traffic intersections. A new method called additive conflict flow （ACF） method is suitable to determine the capacity of unsignalized inter- sections in non-lane-based mixed traffic conditions as prevailing in India. Occupation time is the key parameter for ACF method, which is defined as the time spent by a vehicle in the conflict area at the intersection. Data for this study were collected at two three-legged unsignalized intersections （one is uncontrolled and other one is semi- controlled） in Mangalore city, India using video-graphic technique during peak periods on three consecutive week days. The occupation time of vehicles at these intersections were studied and compared. The data on conflicting traffic volume and occupation time by each subject vehicle at the conflict area were extracted from the videos using image processing software. The subject vehicles were divided into three categories： two wheelers,cars, and auto-rickshaws. Mathematical relationships were developed to relate the occupation time of different cate- gories of vehicles with the conflicting flow of vehicles for various movements at both the intersections. It was found that occupation time increases with the increasing con- flicting traffic and observed to be higher at the uncontrolled intersection compared to the semicontrolled intersec- tion. The segregated turning movements and the presence of mini roundabout at the semicontrolled intersection reduces the conflicts of vehicular movements, which ulti- mately reduces the occupation time. The proposed methodology will be useful to determine the occupation time for various movements at unsignalized intersections. The models developed in the study can be used by practitioners and traffic engineers to estimate the capacity of unsignalized intersections in non-lane-based discipline and mixed traffic conditions.

Research on the Optimization Design of Intersections for Safe Operation of Large Trucks

When big trucks are running at urban road intersections,they are easy to interfere with other motor vehicles,and the turning big trucks are easy to have conflicts with non-motor vehicles and pedestrians,which will affect the safety of intersections.This paper first studied the intersection of trucks to the running trajectory,on this basis,through the establishment of mathematical model analysis of large truck steering conditions inside the wheel,and the influence of blind area to the driver.In the research of intersection safety design,the safety design is divided into three parts:Entrance road,internal operation and signal control.At the same time,the design method of the entrance road,the interior of the intersection and the signal control is given,which improves the safety of the truck driving at the intersection.Finally,the intersection of Jungong road and Zhoujiazui road in Yangpu district of Shanghai was selected as a case,and the optimal design of the intersection for large trucks was carried out through the investigation and analysis of actual data.The evaluation and analysis were carried out by using the multi-index matter-element model.The results show that the comprehensive safety correlation degree of the intersection is reduced to 0.42,and the safety level of is improved by one level.

信号控制交叉口直行待行区对通行能力的影响研究

有关道路交叉口直行待行区对通行能力影响的研究不够完善和全面,在实际应用中存在诸多问题。分析直行待行区设置的目的和条件,基于直行待行区停止线前移的特性,考虑启动波对启动损失时间的影响,完善了损失时间和清空时间的计算方式。在停车线法计算通行能力的基础上进行修正,构建了直行待行区交叉口进口道的通行能力模型,量化直行待行区对通行效率的影响。基于实例交叉口视频识别数据,通过轨迹平滑化和缺失轨迹补齐方法获得完整车辆轨迹,并获取交通参数的实际数值,保证了模型结果的实际意义。最后运用仿真软件对通行能力模型结果进行验证,与类似模型进行对比。结果表明:构建的通行能力模型模拟真实情况的准确性较高;由于直行待行区对通行过短对通行能力的优化效果较弱,建议在条件允许的情况下尽量将直行待行区设置到最大长度。

基于交比图像量测技术检测建筑物表面损伤面积的方法

文章提出了基于交比图像量测技术检测建筑物表面损伤面积的方法,针对建筑物外表面损伤部分检测困难,几何信息难以提取的问题,文章将基于交比的单幅图像量测技术应用至含有丰富三维空间平行线的建筑物图像量测中。首先,对图像进行畸变的矫正;再利用建筑物结构中的垂直水平等几何关系,找到消失点,结合已知长度的参考线段以及消失点、消失线构建交比,框选出待测区域,多次嵌套后实现对框选区域边长的量测;再通过数字图像处理技术,对目标区域进行透视变换还原成矩形,并实现二值化、形态学滤波等处理;最后在计算出框选区域实际面积后,统计出框选区域总像素点个数以及损伤区域像素点个数,找到比例关系,计算得到损伤区域面积。