Effect of long-term service on the precipitates in P92 steel

The precipitates in P92 steel after long-term service in an ultra-supercritical unit were investigated by field-emission scanning electron microscopy and transmission electron microscopy and were found to mainly consist of M23 C6 carbides,Laves phase,and MX carbonitrides.No Z-phase was observed.M23 C6 carbides and Laves phase were found not only on prior austenite grain boundaries,martensite lath boundaries,and subgrain boundaries but also in lath interiors,where two types of MX carbonitrides—Nb-rich and V-rich particles—were also observed but the "winged" complexes were hardly found.Each kind of precipitate within the martensite laths exhibited multifarious morphologies,suggesting that a morphological change of precipitates occurred during long-term service.The M23 C6 carbides and Laves phase coarsened substantially,and the latter grew faster than the former.However,MX carbonitrides exhibited a relatively low coarsening rate.The effect of the evolution of the precipitate phases on the creep rupture strength of P92 steel was discussed.

The research of the community-home elderly long-term care service system

With the rapid development of the aging of the population, the demand of long-term care services in the elderly is growing. Because of family miniaturization, core, and currently limited social accumulation are difficult to meet the demand of the elderly in long-term care.Community provides the elderly long-term care services, and provides the elderly all kinds of household helping services. They just make up for the inadequacy of the family and society.And how to make the community elderly long-term care services become more suitable for the needs of the elderly at home, provide better service for the elderly, are our current problems to be solved.

Natural aging mechanism of buried polyethylene pipelines during long-term service

Currently,accelerated aging tests are widely used to study the aging process of polyethylene pipelines.However,this approach can only simulate one or several main influencing factors in the natural environment,which are often quite different from the actual environment of the buried pipelines.In this study,five types of PE80 buried pipelines in service for 9e18 years were taken as the research object,while new PE80 pipelines were taken as the reference group.The aging process and mechanism of polyethylene buried pipelines were studied through mechanical and chemical property tests and microstructural analysis.The results showed that the pipeline exhibited cross-linking as the main aging mechanism after being in service for 0e18 years.The aging degree and law of the inner and outer surface of the pipeline were compared,and the observed mechanism of both surfaces was explained.After 18 years in service,the elongation at the break of the pipe decreased by 16.2%,and the toughness of the matrix in the main collapse area of the tensile sample was the fundamental reason responsible for changes in the mechanical properties.Finally,after 18 years in service,the oxidation induction time of the pipeline was 25.7 min,which was 28.5% higher than the national standard value.There were no potential safety hazards during continuous long-term service.The results of this paper provide reference data and theoretical guidance for the aging process study of buried polyethylene pipelines.

基于Web Service的电梯远程监控

针对电梯远程监控系统中信息的多样性、复杂性等问题,提出一种基于Web Services的电梯远程监控系统。将电梯远程监控中现场设备的控制和数据接口以Web Service的形式发布,从而使现场设备的控制与数据交换变成了标准的WebService方法调用,消除了不同设备之间接口的异构性,实现了跨语言和平台无关,使得设备的集成更加容易。

Long-term outcomes of staged recanalization for concurrent chronic total occlusion in patients with ST-segment elevation myocardial infarction after primary percutaneous coronary intervention

Background In patients with acute ST-segment elevation myocardial infarction(STEMI)who undergo primary percutaneous coronary intervention(PCI),approximately 10%are concomitant with a chronic total occlusion(CTO)in a non-culprit vessel.However,the impact of staged CTO recanalization on prognosis in this cohort remains disputable.This study aimed to compare the long-term outcomes of staged CTO recanalization versus medical therapy in patients with STEMI after primary PCI.Methods Between January 2005 and December 2016,a total of 287 patients were treated with staged CTO-PCI(n=91)or medical therapy(n=196)after primary PCI in our center.The primary endpoint was major adverse cardiovascular and cerebrovascular event(MACCE),defined as a composite of all-cause death,nonfatal myocardial infarction(MI),stroke or unplanned revascularization.After propensity-score matching,77 pairs of well-balanced patients were identified.Results The mean follow-up period was 6.06 years.Overall,the incidence of the primary endpoint of MACCE was significantly lower in staged CTO-PCI group than that in medical therapy group in both overall population(22.0%vs.46.9%;hazard ratio(HR)=0.48,95%CI:0.29-0.77)and propensity-matched cohorts(22.1%vs.42.9%;HR:0.48,95%CI:0.27-0.86).In addition,staged CTO-PCI was also associated with reduced risk of the composite of cardiac death,nonfatal MI or stroke compared with medical therapy in both overall population(9.9%vs.26.5%;hazard ratio(HR)=0.39,95%CI:0.19-0.79)and propensity-matched cohorts(9.1%vs.22.1%;HR:0.40,95%CI:0.16-0.96).After correction of the possible confounders,staged CTO-PCI was independently associated with reduced risks of MACCE(adjusted HR:0.46,95%CI:0.28-0.75),the composite of cardiac death,nonfatal MI or stroke(adjusted HR:0.45,95%CI:0.22-0.94)and all-cause mortality(adjusted HR:0.32,95%CI:0.13-0.83).Moreover,the results of sensitivity analysis were almost concordant with the overall analysis.Conclusions In patients with STEMI and a concurrent CTO who undergo primary PCI,successful staged recanalization of CTO in the non-culprit vessels is associated with better clinical outcomes during long-term follow-up.

Integrating beneficiaries into assessment of ecosystem services from managed forests at the Hubbard Brook Experimental Forest,USA

Background：Forests contribute to human wellbeing through the provision of important ecosystem services.Methods：In this study,we investigated how the perceived importance of ecosystem services may impact the overall benefit provided by managed watersheds at the Hubbard Brook Experimental Forest over a 45-year period,using standardized measures of service capacity weighted by service importance weights derived from a survey of beneficiaries.Results：The capacity of watersheds to regulate water flow and quality was high in all watersheds throughout the study period,whereas cultural services such as scenic beauty declined after harvest.Impacts on greenhouse gas regulation depended on the efficiency with which harvested biomass was used.Surveys revealed that stakeholders placed high value on all ecosystem services,with regulating and cultural services seen as more important than provisioning services.When service metrics were weighted by survey responses and aggregated into a single measure,total service provision followed the same overall trend as greenhouse gas regulation.Where biomass use was less efficient in terms of greenhouse gas emissions,harvesting resulted in an overall ＂ecosystem service debt＂;where use was more efficient,this ＂ecosystem service debt＂ was reduced.Beneficiaries＇ educational backgrounds significantly affected overall assessment of service provision.Beneficiaries with college or university degrees incurred smaller ＂ecosystem service debts＂ and were less negatively affected by harvesting overall.Conclusions：This study highlights the importance of including empirical measures of beneficiary preference when attempting to quantify overall provision of ecosystem services to human beneficiaries over time.

Skill Assessment of Copernicus Climate Change Service Seasonal Ensemble Precipitation Forecasts over Iran

Medium to long-term precipitation forecasting plays a pivotal role in water resource management and development of warning systems.Recently,the Copernicus Climate Change Service(C3S)database has been releasing monthly forecasts for lead times of up to three months for public use.This study evaluated the ensemble forecasts of three C3S models over the period 1993-2017 in Iran’s eight classified precipitation clusters for one-to three-month lead times.Probabilistic and non-probabilistic criteria were used for evaluation.Furthermore,the skill of selected models was analyzed in dry and wet periods in different precipitation clusters.The results indicated that the models performed best in western precipitation clusters,while in the northern humid cluster the models had negative skill scores.All models were better at forecasting upper-tercile events in dry seasons and lower-tercile events in wet seasons.Moreover,with increasing lead time,the forecast skill of the models worsened.In terms of forecasting in dry and wet years,the forecasts of the models were generally close to observations,albeit they underestimated several severe dry periods and overestimated a few wet periods.Moreover,the multi-model forecasts generated via multivariate regression of the forecasts of the three models yielded better results compared with those of individual models.In general,the ECMWF and UKMO models were found to be appropriate for one-month-ahead precipitation forecasting in most clusters of Iran.For the clusters considered in Iran and for the long-range system versions considered,the Météo France model had lower skill than the other models.

The Relationship with Previous Use of Community-Based Services and Informal Caregiver Support and Elderly and Informal Caregivers’ Views of Living Arrangement: Analysis of Official Statistics from 2004 to 2014

Background and Objectives: Views on living arrangement from elderly and informal caregivers are crucial to “ageing in place”. They might be related to the experience in the use of elderly care services, which remains inconclusive in previous literature. This study aimed to explore the association of previous experience in formal and informal long-term care services with views of both elderly and their informal caregivers on living arrangement. Research Design and Methods: This study adopted a cross-sectional design. Assessment records of Minimum Data Set-Home Care for community-dwelling elderly who were eligible for subsidized long-term care services in Hong Kong from 2004 to 2014 were made available. Multivariate logistic regression was applied to examine associations between both views on elder’s living arrangement from the elderly, caregivers and their previous informal caregiver support, and experience in formal care services. Results: 82,306 dyads of elderly and informal caregivers were included in the analysis. The elderly with previous use of home and community-based services (OR = 0.84, 95% CI 0.80 - 0.88) and informal caregivers (OR = 0.78, 95% CI 0.76 - 0.81) believed that the elderly should live away from home. Temporal trends of fewer elderly and caregivers supporting the idea of living away from home were also observed. Discussion and Implications: The results highlighted the importance of informal caregiver’s support and previous utilization of formal home and community-based services. It was concluded that resources and information of community-based care have a significant association with views on living at home also proper support services and training of care for the elderly should be made available to informal caregivers to reduce their burden.

Semantic Region Estimation of Assistant Robot for the Elderly Long-Term Operation in Indoor Environment

In this work, in order to improve spatial recognition abilities for the long-term operation tasks of the assistant robot for the elderly, a novel approach of semantic region estimation is proposed. We define a novel graphbased semantic region descriptions, which are estimated in a dynamically fashion. We propose a two-level update algorithm, namely, Symbols update level and Regions update level. The algorithm firstly adopts particle filter to update weights of the symbols, and then use the Viterbi algorithm to estimate the region the robot stays in based on those weights, optimally. Experimental results demonstrate that our proposed approach can solve problems of the long-term operation and kidnapped robot problem.

Perihepatic adhesions: An unusual complication of hemolysis, elevated liver enzymes and low platelet syndrome

We present a case of symptomatic perihepatic adhesions,which developed after a pregnancy complicated by hemolysis,elevated liver enzymes and low platelet(HELLP)syndrome,in which a subcapsular liver hematoma occurred.Our patient presented with complaints of persistent,severe right-sided upper abdominal pain.The complaints developed gradually,one year after a pregnancy that had been complicated by HELLP syndrome with a subcapsular liver hematoma.The hematoma had resolved spontaneously.An upperabdominal magnetic resonance imaging revealed a density between liver and diaphragm at the site of the former subcapsular hematoma,suspect of perihepatic adhesions.The presence of perihepatic adhesions was confirmed during a laparoscopy and treated by adhesiolysis in the same session.The adhesions may have developed in response to the degradation process of the subcapsular liver hematoma during conservative treatment.This case of perihepatic adhesions may therefor be the first presentation of a long term sequel of subcapsular liver hematoma in HELLP syndrome.

仿真数据驱动的长期服役电梯导轨故障迁移诊断方法

现有的电梯导轨故障诊断研究存在水平振动分类数据稀缺,训练和测试数据集分布差异较大等问题。提出了一种仿真数据驱动的长期服役电梯导轨故障迁移诊断方法。首先构建电梯轿厢的水平动力学模型,将不同类型的导轨故障激励作为系统输入进行仿真,获得丰富的轿厢水平异常振动数据;然后融合残差网络和卷积注意力机制来提取故障特征,采用子领域自适应方法实现无监督场景下源域与目标域条件分布的对齐;最后使用不同工况下的电梯水平振动数据作为目标域对所提方法进行验证。实验结果表明,所提方法在无监督跨域场景下具有较高的故障诊断精度,为解决长期服役电梯的故障数据稀缺问题提供了参考。

Video caching and scheduling with edge cooperation

In this paper,we explore a distributed collaborative caching and computing model to support the distribution of adaptive bit rate video streaming.The aim is to reduce the average initial buffer delay and improve the quality of user experience.Considering the difference between global and local video popularities and the time-varying characteristics of video popularity,a two-stage caching scheme is proposed to push popular videos closer to users and minimize the average initial buffer delay.Based on both long-term content popularity and short-term content popularity,the proposed caching solution is decouple into the proactive cache stage and the cache update stage.In the proactive cache stage,we develop a proactive cache placement algorithm that can be executed in an off-peak period.In the cache update stage,we propose a reactive cache update algorithm to update the existing cache policy to minimize the buffer delay.Simulation results verify that the proposed caching algorithms can reduce the initial buffer delay efficiently.

Ecosystem service availability in view of long-term land-use changes:a regional case study in the Czech Republic

This study aims to analyze how changes in land use influenced the delivery of ecosystem services in Cezava,a South Moravian agricultural region in the Czech Republic,in the period of 1845–2010.An observation of this period covering more than 160 years made it possible to reflect on social forces driving processes of transformation in the country.To capture the landscape multifunctionality and to indicate the environmental quality of the area under study,seven services provided in parallel by arable land,forests,and bodies of water were studied.The quantification of ecosystem services is based primarily on the transfer of values from the existing literature and on chronicle reviews and map analysis.Because looking back to the more distant past is a challenge and reliable information resources are lacking,a simple scoring method defining the functional features of the ecosystems was applied in order to evaluate the change of qualitative characteristics of the observed ecosystems.Besides that,the findings of these integrated assessments were supported by an analysis performed using landscape metrics.A comparison of service provision over the decades revealed that regulating and cultural services were significantly reduced,while provisioning services increased due to the proliferation of arable land,land consolidation,and agricultural intensification.However,a trend of improvement in the delivery of ecosystem services was introduced after 1990.Despite several uncertainties,this study demonstrates that it is possible to analyze long-term land-use trends to generate more meaningful,spatially explicit information,which can form the basis for landscape planning and ecosystem management.

智慧电梯数据服务平台对医院后勤管理的赋能研究

基于儿童专科医院用梯特点,通过物联网手段将电梯管理数字化,利用大数据完成后勤管理部门对电梯系统智慧化管理的充分闭环,并有效实现维保、物业等相关部门在电梯高效使用和维护上的联动。

An Innovative Person-Centered Model for Provision of Mental, Social and Medical Care for People Living with Dementia

Globally there is an increased digitalization going on with an increasing number of people having access to the internet, having smartphones and now also in many countries being expected to access health-related information and schedule appointments through websites, apps or web-based portals. Healthcare providers have also adopted this with an increasing number of public or private organizations providing web-based portals as well as app interfaces to some of the largest electronic healthcare systems. The benefit of this is easier access, more efficient provision of services, increased transparency and improved workflows. This may increase the population’s capability to manage their conditions and reduce the contacts to, thereby burdening healthcare professionals. But not all will be able to benefit from this digital (r)evolution. Those who will not be able to include people with dementia. For people with dementia to also be able to take advantage of digital health tools and services, it will require planning and involvement of caregivers. In 2017, we presented the Epital Care Model as a framework to organize an efficient people-centered cross-disciplinary and cross-sectoral way to organize activities, roles, responsibilities and describe geographical locations and used technologies in response to individuals’ specific diagnoses and everyday changes in their condition. In 2021, an EU-funded project was initiated to investigate how living labs and scaling up could be done building upon the ECM. One of the living labs was organized around an organization providing care to PWD in Netherlands. In the period 2021 to 2024, we have tried to identify ways for how the ECM could be used to digitally enable the services provided by the organization. In 2022, the care organization tanteLouise started a project originally named Daycare Centre2.0 (now called “Van Thuis Uit” meaning “From Home”), together with healthcare insurance company CZ, and developed a model for onboarding people with dementia and introducing them to specific interventions based on their personal goals and needs. We here present how the ECM and the “Van Thuis Uit” can be mapped within each other to create synergy in creating a healthcare setting for people with dementia. This work may serve as a model for other conditions, where individuals are likely to need more intensive support from their informal caregivers due to a relatively rapid progression of the condition or development of severe impairments. Examples here can be neurologic conditions such as multiple sclerosis and amyotrophic lateral sclerosis or the final stage of conditions that require palliation.

电梯安全性能的影响因素和检验策略研究

分析了电梯安全性能的影响因素,重点关注了电梯振动这一重要指标,并针对电梯振动异常数据的快速检测问题,提出了一种基于网格划分的检测方法。该方法通过数据预处理、网格划分、特征提取和异常检测4个步骤,可实现对电梯振动异常的快速、准确识别。对比实验结果表明:提出的方法在检测准确率和计算效率方面均优于传统方法。说明该方法具有良好的实用性,适合应用于电梯振动异常的实时监测与预警。

长期服役乘客电梯的安全隐患分析及防范措施

为落实电梯使用单位主体责任,提高维保单位的维护保养质量,消除在用电梯安全隐患,预防和减少电梯事故,依据T/GDASE0027—2021《在用电梯风险评价规范:曳引驱动电梯》对长期服役的30台电梯开展风险评价,辨识存在的隐患,就评价中发现的共性和典型安全隐患进行分析并提出降低安全风险的防范措施。

基于高程约束的区域LUCC及其生态效应研究——以福州市为例

以福州市5区7县(不包括平潭县)为研究区,以1994-2006年间3期遥感影像解译分类获得的土地利用/覆被数据为基础,并构建个性化的生态系统服务价值与生态效应测算模型,对研究区高程约束下的土地利用/覆被变化(LUCC)及其生态效应进行分析。研究结果表明:①耕地、建设用地和未利用地的变化集中于第1级,园地的变化集中于第4、5级,水域和草地的变化集中于第3、2级,林地的变化集中于第1、3、4级。②各高程等级的生态系统服务价值量均增加。各高程等级LUCC的生态效应指数与模数大致随高程等级增加而减小。

中国ST段抬高型心肌梗死患者急救医疗服务应用情况及对治疗的影响:中国急性心肌梗死(CAMI)注册研究

目的:调查中国ST段抬高型心肌梗死(STEMI)患者急救医疗服务(EMS)的应用情况以及对治疗的影响。方法:入选中国急性心肌梗死(CAMI)注册研究2013年1月1日至2014年10月1日期间107家医院收治的13 549例STEMI患者,分为EMS组2 015例和自行来院组11 534例进行分析。结果:仅2 015例(14.9%)患者呼叫救护车就诊。与自行来院组相比,EMS组接受再灌注治疗的比例较高(64.9%vs 52.9%,P<0.001),从症状发作到医院的中位时间较短(170min vs 240 min,P<0.0001),到达医院至溶栓时间(D2N)较短(47 min vs 53 min,P=0.003),但是门-球时间(即到达医院至球囊扩张时间)相似(106 min vs 108 min,P=0.932)。多因素Logistic回归分析显示,未使用EMS的独立预测因素是农村居民和家中症状发作,而应用EMS的预测因素是非前壁心肌梗死、持续胸痛、严重呼吸困难或晕厥、院前心脏骤停、Killip心功能分级> 2、收缩压<100mmHg(1 mmHg=0.133 kPa)、超重/肥胖以及至省级医院就诊。结论:中国STEMI患者应用EMS的比例仅15%左右。应用EMS的患者从症状发作到医院就诊时间较短,接受再灌注的比例较高,但门-球时间未缩短。中国应加强公众教育,鼓励胸痛患者使用EMS,以及加强EMS和医院的衔接。

医院电梯人性化服务举措

随着现代化医院的高度发展,每天都有大量的人流、物流需要通过电梯输送,医院高层建筑垂直运输已成为一个突出问题。减少候梯时间、防止交叉感染等项措施都能为患者的人身安全多一份保障。结合医院在电梯日常管理及服务工作中的经验,通过医院电梯的合理设置,人员、物资分流疏导,电梯基础设施消毒等人性化服务举措,提高医院电梯的输送速度和使用率,并有效防止各类人员的交叉感染,为患者和医务工作者提供安全、舒适的乘梯环境。