Research on the Index System of Old Neighborhood Renovation Based on Green Building Evaluation Standard

With the advancement of the transformation,the contradiction between the residents’demand for a better living environment and the convenience of living in the settlements comes to the fore.Effective identification,organic integration,timely adoption,and correct decision-making for the transformation of old neighborhoods are pressing issues in the transformation of old neighborhoods.Therefore,this paper takes the green building evaluation standards of various countries as the research basis and support for the construction of the transformation strategy of old neighborhoods.Through the collection and comparative analysis of the indicators of green building evaluation standards,the index system of transformation is formed,and it also provides a certain foundation for the subsequent related research.

Analysis of Safety Assessment and Testing of Heavy Traffic Vehicles on Old Bridges Without Data

This article presents a real-life project that aimed to evaluate the safety of traffic vehicles on old bridges without any prior data.The project involved various safety inspections,including conventional,static,and dynamic load inspections and safety assessments.After conducting these tests,it was concluded that the structure of the old bridge is relatively safe,with only a few bumps.The bridge could function normally following appropriate treatment.The analysis provides valuable insights into the assessment of the quality and safety of such bridges to ensure the safe driving of heavy vehicles.

Structural Damage Identification System Suitable for Old Arch Bridge in Rural Regions: Random Forest Approach

A huge number of old arch bridges located in rural regions are at the peak of maintenance.The health monitoring technology of the long-span bridge is hardly applicable to the small-span bridge,owing to the absence of technical resources and sufficient funds in rural regions.There is an urgent need for an economical,fast,and accurate damage identification solution.The authors proposed a damage identification system of an old arch bridge implemented with amachine learning algorithm,which took the vehicle-induced response as the excitation.A damage index was defined based on wavelet packet theory,and a machine learning sample database collecting the denoised response was constructed.Through comparing three machine learning algorithms:Back-Propagation Neural Network(BPNN),Support Vector Machine(SVM),and Random Forest(R.F.),the R.F.damage identification model were found to have a better recognition ability.Finally,the Particle Swarm Optimization(PSO)algorithm was used to optimize the number of subtrees and split features of the R.F.model.The PSO optimized R.F.model was capable of the identification of different damage levels of old arch bridges with sensitive damage index.The proposed framework is practical and promising for the old bridge’s structural damage identification in rural regions.

Research on the feasibility of storage and estimation model of storage capacity of CO_(2)in fissures of coal mine old goaf

The concept of the carbon cycle in the old goaf of a coal mine based on CO_(2)utilization and storage was put forward adhering to the principle of low-carbon development,utilization of space resources in old goafs,and associated gas resources development.Firstly,the evolution characteristics of overburden fissures in the goaf of the case was studied using a two-dimensional physical similarity simulation test,the sealing performance of the caprocks after stabilization was analyzed,and the fissures were counted and classi-fied.Then,the process of gaseous CO_(2)injection in the connected fissure was simulated by Ansys Fluent software,and the migration law and distribution characteristics of CO_(2)under the condition of gaseous CO_(2)injection were analyzed.Finally,the estimation models of free CO_(2)storage capacity in the old goaf were constructed considering the proportion of connected fissure and the effectiveness of CO_(2)injection.The CO_(2)storage capacity in the old goaf of the case coal mine was estimated.The results showed that a caprock group of“hard-thickness low-permeability hard-thickness”was formed after the caprock-fissures system in the goaf of the case tended to be stable vertically.The connected fissure,occlude cracks,and micro-fractures in the goaf accounted for 85.5%,8.5%,and 6%of the total fissures,respectively.Gaseous CO_(2)first migrated to the bottom of the connected fissure after CO_(2)was injected into the goaf,then spread horizontally along the bottom of the connected fissure after reaching the bottom,and finally spread longitudinally after filling the bottom of the entire connected fissure.The theoretical and effective storage capacities of free CO_(2)at normal temperature and pressure in the old goaf of the case were 9757 and 7477 t,respectively.The effective storage capacity of free CO_(2)at normal temperature and pressure in the old goaf after all minefield mined was 193404 t.The research can provide some reference for the coal mining industry to help the goal of“carbon peaking and carbon neutrality”.

Chemical and physical studies of metallic alloy-based old Indian coins with LIBS coupled with multivariate analysis

The present work aims to demonstrate the capabilities of Laser-induced Breakdown Spectroscopy(LIBS)coupled with a multivariate technique for rapid quantification and classification of old Indian coins made of various alloys.Thirteen old Indian coins in different years of circulation,(1922–1986)were selected for the study.The concentrations were determined by Calibration free LIBS(CF-LIBS)method.The concentration of cuprum(Cu)is negligible,and aluminum(Al)is maximum in the first five coins,and vice-versa in the remaining eight coins.Two different multivariate methods,Principal Component Analysis(PCA)and Soft Independent Modelling of Class Analogy(SIMCA)have been used to classify and identify the coins.PCA classified all thirteen samples into four main alloy categories.The discernment of unknown samples to their probable class membership of alloy was performed using SIMCA.The surface hardness(Brinell hardness number)is linearly correlated with the plasma temperature and LIBS intensity ratios.The sample surface of the first and fifth coin belongs to Al-alloy,having the least surface hardness,and it became harder for Cu–Ni alloy,Ni-brass alloy,and bronze alloy.The hardness of the surface is more for bronze sample twelve.It is also observed that the plasma temperature increases monotonically with the Brinell hardness number.This analysis provides valuable information on fabrication methodology and explains large diversification in the elementary composition of old coins.

An Extended Fuzzy-DEMATEL System for Factor Analyses on Social Capital Selection in the Renovation of Old Residential Communities

China has been promoting the renovation of old residential communities vigorously.Due to the financial pressure of the government and the sustainability of the renovation of old residential communities,public-private partnerships(PPP)have already gained attention.The selection of social capital is key to improving the efficiency of the PPP model in renovating old residential communities.In order to determine the influencing factors of social capital selection in the renovation of old residential communities,this paper aims to find an effective approach and analyze these factors.In this paper,a fuzzy decision-making and trial evaluation laboratory(fuzzy-DEMATEL)technique is extended and amore suitable systemis developed for the selection of social capital using the existing group decisionmaking theory.In the first stage,grounded theory is used to extract the unabridged key influencing factors for social capital selection in the renovation of old residential communities.Secondly,by considering the impact of expert weights,the key influencing factors are identified.The interactions within these influencing factors are discussed and the credibility of the results is verified by sensitivity analysis.Finally,these key influencing factors are sorted by importance.Based on the results,the government should focus on a technical level,organizationalmanagement abilities,corporate reputation,credit status,etc.This study provides the government with a theoretical basis and a methodology for evaluating social capital selection.

Improving the Use of Insecticide-Treated Nets among Children under Five Years Old in Benin, West Africa

Background: In Benin, malaria represents the first cause of consultation and hospitalization (48% for children under 5 years old) in health units. It also accounts for 23.1% of deaths recorded in health facilities (MoH, 2019). Between the two main components of vector control adopted by Benin government, the mass distribution campaigns of Insecticide-Treated Nets (ITNs) remained the only proven cost-effective way to rapidly achieve high and equitable coverage (WHO, 2017). After the fourth mass distribution campaign conducted in 2017, the Demographic and Health Survey (DHS) data indicated that the percentage of children who slept under an ITN has increased from 20% in 2006 to 70% in 2011-2012 and to 76% in 2017-2018 while the incidence of malaria (tested positive) is increasing rapidly among children under 5 years old, growing from 36.5% in 2009 to 28.8% in 2012 and then to 51.4% in 2019. This study aims to understand this contrast by identifying the origin of the increase in ITN use over time among children under five years old and the factors which determine this use. Methods: Data from the Demographic and Health Survey (DHS) conducted in Benin respectively in 2006 and in 20018 were used during the analysis, which covered 13,445 children under five years old from 2006 DHS and 12,255 children from 2017-2018 DHS. Firstly, the data were analyzed using decomposition method to highlight the origin of the increase of ITN use over time among children under five years old. Secondly, the chi-square test analysis estimated the association between ITN use and some characteristics (wealth index, maternal or caregiver education level and child age). Finally, the logistic regression model was used to identify the main factors, which influence the net use over the study period. Results: This study shows that the improvement of basic conditions is the main origin of behavior change in the use of ITNs among children under five years old. This improvement of the basic conditions consists of making ITNs available in households and informing household members about the benefits of ITN use. So, the free ITN distribution campaigns, routine distribution, awareness campaigns about the benefits of ITN use are the strategies, which increase the household capacities and knowledge, allowing household members to make their children sleep under net. The analysis also shows that region of residence, wealth index of household, household size, religion, and child age continue to determine the ITN use among children under age 5 years old and MNCP will integrate the factors in malaria prevention strategies in order to achieve universal use of ITNs. Conclusions: Although, sleeping under ITN behavior has indeed spread among children under 5 years old, policymakers and other stakeholders should design strategies to maintain and improve the current level of ITN use to reach the collective protection threshold (80% according to WHO). Therefore, to address the challenges of universal use of ITN, the study recommends expanding the routine distribution system to private sector health centers;discussing issues related to health service utilization (particularly ITN use) within a consultation framework at the communal level. In addition, collecting qualitative and quantitative data in the Oueme region will allow better understanding of all aspects of the ITN use gap among children under 5 years.

Transformation Design of Old Parks Based on Behavior Psychology: A Case Study of Hefei Xiaoyaojin Park

City park undertakes the function of urban core green island. Hefei Xiaoyaojin Park providesa leisure and entertainment place for Hefei citizens. Although it has been continuously transformed andupgraded, there are still many places to be improved. Through behavior observation and questionnaire,the usage and satisfaction evaluation of tourists in Xiaoyaojin Park were obtained, and the transformationdesign of Xiaoyaojin Park was analyzed from the perspective of behavior psychology by analyzing thebehavior of tourists in different zones of Xiaoyaojin. Based on the premise of exploring the behaviorof tourists in different spaces, a city park environment that meets the needs of tourists can be created bypromoting the cultural context of the Three Kingdoms, improving the plant landscape and infrastructureof the site, optimizing the spatial function, and exploring the park design and transformation strategy that ismore in line with the needs of people, in order to provide new ideas for the future landscape transformationof Xiaoyaojin park, and offer reference suggestions for the future transformation design of old city parks.

Landscape Upgrading and Transformation of Old Urban Parks from the Perspective of Place Attachment:A Case Study of Nanchang Bayi Park

On the basis of combing the relevant theories of place attachment, the planning framework of upgrading and reconstruction of old parks based on place attachment was put forward. Taking Nanchang Bayi Park as an example, the methods and key points of landscape improvement and transformation of old urban parks based on place attachment were explained to provide new ways and references for the renewal of old urban parks.

Application of the Concept of“Endowing the Old with the New”in Urban Renewal

The renewal of ancient cities is an important part of the urban renewal work in China.However,there are few studies on the general historical ancient cities at the county level in China,and there is no guidance on the renewal path.Through the practice of the renewal design project of Suining County,Xuzhou City,it makes an exploratory study on the renewal concept and mode.It first interprets the connotation and implementation path of the renewal concept of“endowing the old with the new”.Based on the texture analysis of the ancient city of Suining,it finally determines the design theme that tracing the historical context of the ancient city.Using the renewal techniques such as“extraction-transformationactivation”,through the renewal strategies such as“building new space,shaping new landscape,inheriting new culture and pregnant with new environment”,it realizes the regeneration of urban historical context and meets the needs of residents'modern life,so as to provide reference and guidance for the renovation of general historical ancient cities at the county level in China.

Construction of Industrialization Development Model for"1+4+X"Community-Based Elderly Care in Gannan Old Revolutionary Base Area in the Context of Population Aging

In the context of controlling population development in a planned way,China entered an aging society in the early 21 st century.In this context,how to meet the needs of the elderly care and form an effective elderly care model has become a key problem to be solved urgently by local government departments.With the continuous advancement of the elderly care policy,the community-based elderly care has gradually become the mainstream and is in the stage of vigorous promotion.Taking the Gannan old revolutionary base area in Jiangxi Province as an example,this study puts forward"1+4+X"community-based elderly care model based on the policy system of community-based elderly care,the physical and mental health of the elderly,the material space and the construction of evaluation system,and explores how to promote the application of this community model efficiently in the form of industrialization,so as to drive the economic growth of the Gannan old revolutionary base area,promote the employment development and improve the community-based elderly care service.

罗斯曼指数对老年髋膝关节置换后非计划再入院和并发症的影响

背景:人工髋膝关节置换术在老年群体中有广泛应用,但临床中缺乏对患者非计划再次入院和术后并发症的准确预测方法。目的:探讨罗斯曼(Rothman)指数对老年髋膝关节置换患者术后非计划再入院和并发症的影响。方法:选择遵义市第一人民医院骨科一病区2020年12月至2022年12月接受择期髋、膝关节手术患者153例为研究对象,根据出院后90 d内是否非计划再次入院分为再入院组(n=21)和非再入院组(n=132)。通过电子病历系统统计所有患者一般性资料,包括性别、年龄、体质量指数、合并糖尿病、合并高血压、手术关节类型等,参照文献评估Rothman指数,统计患者术后并发症。结果与结论:①再入院组和非再入院组患者性别、体质量指数、手术关节类型、住院时长比较差异无显著性意义(P>0.05),两组共病数量、年龄、Rothman得分比较差异有显著性意义(P<0.05);②多因素Logistics回归分析结果显示,共病数量、年龄和Rothman得分均是老年髋、膝关节疾病患者术后90 d再入院的独立影响因素(P<0.05);③受试者工作特征曲线分析结果表明,Rothman指数预测人工髋膝关节置换术后90 d再入院曲线下面积为0.824,敏感度为80.85%,特异度为78.85%,最大youden指数为0.597,最佳截断值为46分;④Rothman<46分的老年患者总并发症发生率高于Rothman≥46分的老年患者(P<0.05);⑤提示Rothman指数可较为准确地预测老年髋、膝关节疾病患者术后非计划再入院,同时Rothman指数低于46分者发生并发症总体风险较高,关节恢复较差,可用于临床中改善患者术后管理。

设施蔬菜产业发展(五) 我国老旧蔬菜设施现状、问题及改造提升对策建议

目前我国正在加快建设现代设施农业,推进老旧蔬菜设施改造升级,促进设施蔬菜产业的高质量发展。但是对老旧设施的现状和存在问题缺乏系统梳理,对如何破解改造工作面临的困难和提升改造对策缺乏系统研究。通过调研我国主要设施蔬菜产区,总结老旧设施现状及存在的主要问题,分析推进改造提升的主要制约因素,并提出明确工作重点、优化设施结构、完善工作机制、增强条件保障等方面的对策建议。

中老年肠道炎性肌纤维母细胞瘤临床病理及预后特点

目的探讨中老年肠道炎性肌纤维母细胞瘤(inflammatory myofibroblastic tumours,IMT)的临床病理及预后特点。方法回顾性分析5例中老年肠道IMT的临床、病理形态、免疫表型及随访结果。结果4例IMT发生在右半结肠,1例在回肠。3/5患者有肠道损伤史,首发消化道症状且白细胞增高。瘤组织由梭形肌纤维母细胞和纤维母细胞构成,席纹状排列,浸润性生长,伴较多淋巴细胞、浆细胞浸润,可见胶原化及黏液水肿。其中一例异型性明显,核大且畸形。免疫表型:瘤细胞vimentin(5例)、SMA(5例)、desmin(3例)、ALK(3例)、CK(2例)阳性,Caldesmon、CD34、β-catenin、MC、CD117、DOG1、S-100、BCL-2、CD99、CD68均阴性,Ki-67增殖指数1.28%~10.01%。5例均完整切除肿瘤,随访53~137.5个月,其中1例83岁患者,于术后27个月影像学考虑肿瘤复发;另一例术后无瘤生存122个月,因其他原因去世;其余均无瘤生存,基本状况良好。结论(1)本组中老年肠道IMT多见于右半结肠,多有肠道损伤史,多首发消化道症状,白细胞多升高;(2)Vimentin和SMA同时阳性,多伴ALK阳性;(3)4/5的患者手术切除治疗效果好,1/5的患者术后2~3年可复发;高龄且ALK阳性、Ki67达10%、异型性明显很有可能是中老年肠道IMT复发的重要危险因素,其中ALK阳性者复发的风险或许为1/3。

基本养老服务制度的政策逻辑与内涵特征

现阶段建立基本养老服务制度是在新时期我国转变政府职能和提升政府民生治理能力的背景下,进一步划分政府、家庭、市场等养老主体在养老服务中的责任边界,强化政府“兜底线、保基本”的养老保障职责,增强老年人的普遍幸福感和获得感的制度探索。然而,当前基本养老服务政策内容较为薄弱,相关理论研究也较为匮乏,本文以系统梳理基本养老服务发展脉络为出发点,深入挖掘基本养老服务制度形成的政策逻辑,详细阐释基本养老服务制度的内涵与特征,为基本养老服务制度完善提供思路。

近10年国内老年血液透析研究热点的可视化分析

目的:分析我国老年血液透析患者的研究现状、热点及趋势。方法:检索中国知网(CNKI)、万方数据库、维普数据库、中国生物医学文献数据库近10年发表的老年血液透析相关文献,应用CiteSpace 6.2.R7对相关研究的作者、研究机构、关键词进行可视化分析。结果:检索出符合要求的文献1545篇,文献发文量保持平稳增长,2018年为发文高峰;发文期刊多为医疗类期刊,发文量最多的作者为罗洋、陈文和郭一丹,各6篇;发文量较多的地区集中在北京、上海、南京和四川。老年血液透析研究热点集中在治疗、用药、预后和并发症的管理。结论:老年血液透析研究内容较广泛、热点不突出;研究领域内作者及机构合作不紧密,未形成稳定的核心作者群;目前的研究水平发展较不均衡,护理研究内容和质量有待加强。

基于网格划分的老城区公园景观组合设计方法

为了提高景观配置效率,提出基于网格划分的老城区公园景观建设组合设计方法.数字影像内定向原始景观图像以生成正射影像模型,通过梯度分解提取边缘信息完成图像采样.结合空间区域特征匹配方程优化提取多维度景观数据,构建多维度景观图像的动态特征分布模型,在此基础上划分景观区域网格,并结合景观特征属性解析结果实现景观建设组合设计.通过城市公园的景观设计表明,所提方法能够有效提高景观配置效率,景观设计的规划效果较好.

从高钙富硼老卤中提硼研究

以青海某高钙富硼老卤为研究对象开展了提硼研究。结果表明,合适的萃取条件为:磺化煤油为稀释剂、异辛醇用量50%、萃取相比1.0、萃取混合时间15 min;合适的反萃条件为:反萃剂为pH=1的稀盐酸、反萃相比1.5、反萃混合时间15 min。以此条件在5级混合澄清槽中完成了连续逆流萃取—反萃运转试验,连续运转45 h,硼萃取率为95.49%,硼与钾、钠、钙、镁的分离效果较好;硼反萃率为99.59%,反萃液中硼含量达17.17 g/L。采用“溶剂萃取—反萃—高温蒸发—低温冷却结晶—重溶—冷却结晶—过滤洗涤—干燥”工艺高效分离提取硼,硼总回收率为92.33%,制备出的硼酸产品达国家标准(GB/T 538—2018)要求。

老油田SEC储量精细评估与油气资产精益管理研究

老油田经过多年开发剩余油潜力有限,为进一步挖掘上产潜力,通常会加大产能建设和增产措施等工作投资力度,而持续投资带来的新增资产会加重油气资产包袱,增加老油田乃至整个油区的完全成本,降低老油田抵御低油价风险能力。为了从根本上提升老油田的资产创效能力,文章以典型老油田A为例,深入剖析内部单元生产差异以及储量资产单元整合评估管理造成油气资产包袱重的问题,开展老油田SEC储量精细评估和油气资产精益管理研究。A油田根据内部开发区生产差异细分储量评估单元后,对新建产能井、老井措施及转变开发方式等工作的定量增储效果进行精细评估,实现效益增储最大化。同时优化匹配储量、资产单元关系,可加速资产的折耗和减值,精准解决A油田资产包袱重的问题,降低完全成本、增大盈利空间,有效增强了老油田抵御低油价风险的能力。

延迟退休对青年人就业的挤入效应研究

本文从理论上提出了延迟退休对青年人就业产生挤入效应的两条途径,并基于2005年1%人口抽样调查微观数据和2010年第六次全国人口普查微观数据,采用双向固定效应模型实证研究了延迟退休对青年人就业的影响及作用机制。研究结果显示:延迟退休不仅不会挤出青年人就业,反而会对其产生挤入效应。异质性分析结果表明,相较于男性青年人,延迟退休对女性青年人就业的促进作用偏弱;高学历老年人延迟退休能够促进高学历青年人就业,低学历老年人延迟退休能够促进低学历青年人就业。机制分析结果表明,延迟退休通过降低实际老年抚养比促进青年人就业。调节效应分析结果表明,经济发展水平对延迟退休与青年人就业之间的关系存在正向调节效应。本文的研究结论支持政府为增加劳动力供给提出的延迟退休政策,建议推进渐进式、弹性式延迟退休政策。在实行延迟退休政策的同时,政府应适时调整其他相关政策。在三孩生育政策全面放开阶段,政府应重视年轻家庭对祖辈隔代照料的需求。此外,政府应鼓励老年劳动力提升自身人力资本水平。