Functional Characteristics of Beijing Subway Stations Based on POI Data:Taking Beijing Metro Line 6 as An Example

Urban subway station is a key node related to urban social,political,economic and cultural activities.There are some differences in the location,function orientation,land use and flow characteristics of different types of stations in the city.This paper mainly used Tyson’s edge,kernel density analysis,chart analysis and other methods to classify the functional types of 412,393 POI data of 26 stations along Metro he results showed that the spatial distribution of Beijing Metro Line 6 was mainly divided into 3 categories,subway stations were divided into 4 categories.Among them,type A sites were divided into composite and single types,and the distribution characteristics of the 6 types of sites were quite different.Based on the qualitative and quantitative analysis of POI point data,this method can quickly classify and analyze the characteristics of stations along Line 6 in Beijing,which also has theoretical and practical value for the planning of urban subway lines.

Function Analysis of Urban Rail Transit Smart Station

In order to make rail transit smart stations serve passengers better,the potential of smart stations should be optimized to reduce time cost,and relieve traffic congestion.In this paper,the construction of smart stations based on the management experience of a subway station and the benefits of smart stations were analyzed and discussed.The construction of smart stations,as well as the key technologies for the construction of smart stations,will aid in the automation and intelligent management of subway stations.

Classification of Service Functions in the Life Circle of Beijing Subway Line 7

As a key node for the surrounding area,metro stations are closely connected with the surrounding urban space and develop cooperatively.Different types of metro stations have differences in land use and functional positioning.This paper mainly used the methods of Tyson polygon,kernel density analysis and correlation analysis,based on POI data,to classify the stations of Beijing Metro Line 7.This paper made a detailed analysis of commercial subway stations,and analyzed the distribution characteristics of commercial metro stations on Line 7.

基于区间推理和AFS结构的模糊分类器

在分析区间值模糊集理论和现有模糊分类器的基础上,提出两种分类器的算法,它们分别是建立在区间值推理和AFS结构上的.经Iris数据实验,证明第一种算法分类结果很好,后一算法不仅结果与前面的一样好,而且它还能处理一些描述模糊概念的数据库.这两种算法在分类实践中具有良好的应用前景.*

基于小目标类别注意力机制与特征融合的AF-ICNet非结构化场景语义分割方法

针对非结构化道路分割难度大、小目标检测精度较低等问题,构建基于小目标类别注意力机制与特征融合的AF-ICNet轻量级实时语义分割网络。采用空洞空间卷积池化金字塔融合不同尺度特征感受野以增强网络的全局感知能力。嵌入CA注意力机制,建立通道信息和空间位置信息以增强网络对非结构化道路小目标类别语义特征的提取能力。针对类别分布不均衡问题,改进权重交叉熵损失函数。利用AF-ICNet模型对Cityscapes与IDD数据集进行训练,在Cityscapes测试图像中分割的MIoU达到了71.5%,在IDD测试图像中分割的MIoU达到了62.5%。搭建实验测试系统进行实景测试,测试结果表明,AF-ICNet有效提升了非结构化道路及小目标类别的分割精度,并满足测试的实时性要求。

基于相平面的车辆AFS与DYC可拓协调控制

为了提高汽车的操纵稳定性,弥补主动前轮转向(AFS)在轮胎侧向力饱和的情况下对车辆稳定性控制的不足,引入直接横摆力矩控制(DYC),设计了基于相平面的可拓协调控制系统,分为上、下两层。上层为AFS和DYC的功能协调层,以轮胎侧偏特性线性极限和β相图稳定域边界作为依据来划分汽车行驶状态,对应于可拓集合中的经典域、可拓域和非域,运用可拓学理论求解关联度函数,并确定控制器间的协调权重;下层为主动前轮转向控制器和直接横摆力矩控制器,均采用粒子群算法优化PID控制参数。利用Simulink与CarSim软件搭建联合仿真试验平台,选用低附单移线工况和低附阶跃转向工况进行仿真验证。结果表明,本文所设计的可拓协调控制策略能有效弥补单一主动前轮转向控制的不足,改善车辆对参考轨迹的跟踪效果,并能降低质心侧偏角,保证了车辆的行驶稳定性。

AFS自动陀螺定位定向系统在地铁中的应用

根据笔者的实践经验,本文介绍了AFS自动陀螺系统的组成、功能和作业步骤。实践证明,将其应用在地铁工程测量中,能够达到提高隧道贯通精度、大大提高作业效率及降低劳动强度等目的。

Service Functions of Private Community Health Stations in China: A Comparison Analysis with Government-sponsored Community Health Stations

In China, with the restructuring of health care system moving forward, private community health facilities have been playing a complementary but increasingly important role in providing public health and basic medical care services in urban areas. However, only limited evidence is available con-cerning the service functions of private community health facilities in China. The aim of this study was to explore the functions of private community health stations (PCHSs) to provide evidence-based rec-ommendations for policy-making and practice in the development of urban community health services systems. A total of 818 PCHSs and 4320 government-sponsored community health stations (GCHSs) located in 28 cities of China were investigated in 2008. The percentages of stations that provided health services and the annual workload per community health worker (CHW) were compared between the two types of institutions. The results showed that the percentages of PCHSs providing public health services were significantly higher than those of GCHSs (P<0.05); but no significant differences were found in the percentages of basic medical services providing between PCHSs and GCHSs (P>0.05). The annual workloads of all the public health services and basic medical services per CHW in PCHSs were lighter than those in GCHSs (P<0.05), except for resident health records establishment and health education materials distribution (P>0.05). At present, the GCHSs are still the mainstream in urban China, which will last for a long period in future. However, our findings showed that the annual workloads of CHWs in PCHSs were no heavier than those in GCHSs, and the PCHSs were willing to provide public health services. In view of current inadequacy of health resources in China, it is feasible to further develop PCHSs under the guidance of the government, given that PCHSs can perform the basic functions of community health services, which is useful for the formation of public-private partnerships (PPP) and the improvement of community health services.

AFS-9X系列原子荧光仪软件操作功能的开发应用

介绍AFS-9X系列原子荧光仪工作系统应用管理样品校正测试样品检测结果的软件操作方法。仪器可自动显示更接近于真值的校正值及试验的回收率,加强和完善了仪器对检测结果质量控制的功能,说明了软件操作中影响检测数据准确度的注意事项。

Functional Characteristics of the Surrounding Area of Beijing Metro Line 5 Based on POI Data

As an important urban infrastructure,rail transit not only has transportation function,but also has a close connection and harmonious development with the surrounding urban space.Taking Beijing Metro Line 5 as an example,each station of Beijing Metro Line 5 was analyzed by GIS software and Echarts chart based on POI data.The functions of subway site type were divided into main function,secondary function and no significant function,and various types of sites within the main functional characteristics of urban functions were discussed in details.The paper presents a new method for identifying urban functional features,which can be applied to not only other metro stations in Beijing but also the same type of cities.Moreover,it lays a foundation for the research of rail transit subway stations and their related researches.

西安市城市轨道交通站点功能演变及影响因素

城市轨道交通站点功能是城市土地利用状况和空间活力的综合反映,轨道交通站点与城市用地的协调发展对于缓解交通拥堵压力、提高土地利用效率具有积极的作用。运用信息熵、优势度、均衡度和多元回归模型,分析2011—2020年西安市中心城区轨道交通站点功能演变及影响因素。结果表明:西安市城市轨道交通站点功能呈现波动上升、中稳外变和混合主导的演变特征,商服功能、到城市中心的距离是城市轨道交通站点功能演变的主要因素,其中,商服功能对城市轨道交通站点功能的混合度呈正向影响,到城市中心的距离对城市轨道交通站点功能的混合度呈负向影响。规划期城市空间格局对城市轨道交通站点功能具有重要影响,建设期地区经济水平成为关键因素,运营期商业服务业则成为推动城市轨道交通站点功能演变的主要力量。基于城市轨道交通站点功能演变的时空分异和影响因素探究,有助于优化城市轨道交通站点周边区域土地利用和提升城市轨道交通站点活力。

Electromagnetic response function for the semi-annual variations estimated by the single-station method using the night-time values of the geomagnetic fields

The geomagnetic night-time values were used to estimate the electromagnetic response function Q1 for half-year period. If the spatial structure of the source field can be described by the approximation, one can estimate the Q1 value using the single-station Z/H method. This technique enables us to carry out regional deep gcomagnetic sounding by the method. The data used for analyses are geomagnetic night-time values for about, typically, 26 years from 5 good-quality stations and for several years from 34 stations distributed over the globe. The results indicate that the night-time values yield more reliable response estimates for half-year period compared to the usual estimates obtained from daily means. It implies that the approximation for the night-time fields holds good for the half-year period, but the daily means are not suitable for estimating the response function of the semi-annual variations by using the single-station method. Source field analyses for daily means data and night-time means data have also been carried out in this paper.

全过程人民民主视域下人大代表联络站的功能定位与完善路径

人民代表大会制度是实现我国全过程人民民主的重要制度载体,而人大代表联络站则是我国人民代表大会制度和全过程人民民主在基层的生动实践平台。近年来,人大代表联络站得到快速发展,但也同样面临一系列困境与挑战。因此,进一步厘清人大代表联络站的功能定位、践行全过程民主模式、完善人大代表联络站制度具有重要的理论价值和现实意义。已有研究缺乏对人大代表联络站的实践发展进行全方位的理论探讨和系统总结。本文基于全过程人民民主视角,分别从法律定位、政治定位、角色定位和实践定位四个维度阐释人大代表联络站的具体功能定位,梳理浙江省人大代表联络站践行全过程人民民主的创新模式和做法,剖析人大代表联络站在身份认同、代表履职、实践功能、组织建设和协商议事等五个方面所面临的主要困境,最后提出完善人大代表联络站的对策路径。

基于多维效用函数的多基站运行成本优化方法

现有移动通信系统出现业务量迅猛增长现象,为缓解增长的基站负荷带来的基站功耗,移动通信系统中为基站配备了可再生能源产能设备。如何实现通信系统信息流与能量流匹配,完成通信业务与基站可再生能源储备的精确配对,更加充分的利用通信系统内可再生能源,是下一步优化通信系统网络性能并降低系统运行成本的关键。为此,本文构建了一个多维效用函数,该函数联合考虑了用户的接受信干噪比、可再生能源利用与基站负载3种因素。通过将求解多基站系统运行成本最小化问题转化为多维效用函数效用值最大化问题,对多基站系统进行优化,并实现系统运行成本最小化。问题转化后为一个混合整数非线性优化的非凸问题。为求解该问题本文提出了多维效用函数迭代优化算法,将该问题拆分为用户调度、功率分配与基站负载均衡3个子问题,通过采用交替优化和连续凸近似技术对问题进行迭代求解。仿真结果表明,相比于最大SINR关联优化算法与“最大SINR+可再生能源利用”优化算法,本文算法在可再生能源利用率方面分别提升了58.68%和29.74%,且系统总费用一直维持在较低水平,具备显著优势。

乡镇综合文化站服务效能评估指标体系构建探讨

构建一套科学实用的乡镇综合文化站服务效能评估指标体系,对于测评文化站建设现状、考核公共文化服务供给成效、引导公共文化服务高质量发展,具有十分重要的作用。文化站服务效能评估指标体系的设计应坚持善治的理念,并遵循目标性、客观性、可比性和可行性原则。该文从公共文化服务的投入、产出、效果以及群众满意度4个方面设计由3个层次、共35个指标组成的乡镇综合文化站服务效能评估指标体系。据此采集数据,然后运用赋权计算方法对数据进行处理和分析,即可综合评价一个文化站的服务供给能力和水平。

特高压换流站抗震韧性及震后修复策略快速评估方法

地震作用下特高压换流站中设备极易损坏,然而由于资源条件限制使得震后抢修效率较低,从而导致了大量经济损失。为寻求高效的震后修复策略,该文搭建一套基于功能状态模型的抗震韧性快速评估框架。从结构和电气两方面建立换流站系统的二维功能网络模型,并利用贝叶斯网络进行功能状态快速评估。为提高系统震后修复效率,提出一种生物启发式多目标优化算法,利用震后迭代模拟得到系统阶梯型功能时变函数。通过对一典型±800 kV特高压换流站进行抗震韧性分析,得到换流站系统的关键抢修设备及最优修复策略,证明了最优修复策略的有效性和必要性。该框架量化了特高压换流站的震后修复过程及抗震韧性水平,可为换流站系统的震后应急抢修提供参考。

水电站水库库容特性解析与建模研究

针对水库库容特性的函数化表征问题,通过对水库的形态特征进行抽象,构建了描述水库一般性形态特征的三棱锥模型和不规则锥体模型,在此基础上采用数学积分方法推导出表征水库库容特性的三参数幂函数模型,并根据水库库容特性的数学性质,给出了三参数幂函数的参数取值范围,最后以长江中上游流域37座水库为研究对象,通过合理性分析和拟合优度评价,证明了三参数幂函数是一种适用性广、可靠性高、物理意义明确的水库库容特性表征函数。研究成果可为水电站水库发电精细化调度提供基础函数曲线支撑。

实践驱动理论构建——站城融合X混合功能模块体系

随着经济社会发展,中国铁路客站功能日趋完善,站城连接愈发紧密。将客站及其周边5~10 min的步行范围定义为站城核心区并作为主要研究范围,对站城融合案例功能和空间类型进行系统性梳理,首次提出X混合功能模块,结合客站功能模块、城市配套功能模块、城市开发功能模块3大基础功能模块,构建站城融合X混合功能模块体系,分析国内外典型案例柏林中央车站、上海虹桥站和兰州中川站的功能模块构成。通过构建站城融合X混合功能模块体系,促进未来设计创新和机制突破,提升站城融合发展空间品质。

AF-8B对小鼠机体抗疲劳作用的研究

试验观察从天然植物中提取的黄酮醇苷类化合物AF-8B对小鼠机体是否有抗疲劳作用.方法通过小鼠负重游泳试验、肝糖原测定以及血乳酸测定对AF-8抗疲劳作用进行综合考察.结果AF-8B能显著延长小鼠负重游泳时间、增加小鼠肝糖原含量、减少小鼠血乳酸含量.结论AF-8B具有显著抗疲劳作用.

多站联合观测非合作目标的定位批号关联算法

在多站联合对非合作多目标进行定位场景中,提出了一种批号关联算法。该方法利用模糊数学理论描述已关联集和待关联量测中方位信息、连续谱特征信息和线谱特征信息之间的模糊隶属度,构建综合模糊关系矩阵进行二维关联,通过设置隶属度门限消除低隶属度关联的影响。仿真结果表明,所提算法克服了传统算法在目标增多关联成功率下降的问题,在一定的漏报虚警时关联结果召回率可达到0.8以上,关联结果精度也保持在较高水平。仿真结果及试验数据均验证了该方法在复杂水下环境中较好的目标关联定位性能。