Influence of resilience on depression among nurses in clean operating departments:The mediating effect of life satisfaction

BACKGROUND A clean operating room is an important part of surgical and critical treatment in hospitals.The workload is substantial,the pace is rapid,and the working environment is intense;therefore,nurses who work in clean operating rooms are constantly challenged,which can lead to anxiety,depression,and other mental health issues.Life satisfaction and resilience are important factors that ensure mental health.Therefore,exploring the mediating role of life satisfaction in the influence of resilience on depression among nurses in clean operating rooms can help improve nursing services and teamwork.AIM To explore the mediating effect of satisfaction on the influence of resilience on depression among nurses in a clean operating department.METHODS From April to November 2022,196 nurses from the Department of Clean Operating at Harbin Medical University Cancer Hospital participated in this study.Participants were selected using convenience sampling.Participants’gender,age,marital status,position,length of service,personal monthly income,daily working hours,employment status,and professional title were collected,and the Connor-Davidson resilience scale,satisfaction with life scale,and selfrating depression scale were used to evaluate resilience,life satisfaction,and depression.The researchers conducted professional training in advance,introduced the research methods to the participants before the investigation,and explained the study’s significance and purpose.Surveys were distributed and collected on-site.Each questionnaire took 30 min to complete.RESULTS The average scores for life satisfaction,resilience,and depression were 3.13(±0.28),4.09(±0.78),and 56.21(±8.70),respectively.The correlation between resilience and depression was negative(r=-0.829,P<0.01).Life satisfaction was positively related to resilience(r=0.855,P<0.01)and negatively related to depression(r=-0.778,P<0.01).The relationship between resilience and depression was partially mediated by life satisfaction.The value of the mediating effect was-6.853(26.68%of the total effect).CONCLUSION Life satisfaction partially mediates the link between resilience and depression among nurses in clean operating departments.

变温下暗期LED光照对丝棉木金星尺蛾生命活动节律的影响

【目的】探明变温下暗期给予不同LED光源对丝棉木金星尺蛾Calospilos suspecta化蛹、羽化、交配、产卵和卵孵化活动节律的影响。【方法】在实验室条件下以光周期14L∶10D为对照组,以暗期分别给予10 h红色LED和10 h黄色LED 2种不同光源照射为处理组(分别记为14L∶10R和14L∶10Y),分别对丝棉木金星尺蛾的化蛹、羽化、交配、产卵和卵孵化进行连续5 d的观察,每小时观察1次,计算化蛹率、羽化率、交配率、产卵率和卵孵化率,并比较这些参数在不同试验组间光期或暗期差异以及各组内光期与暗期间的差异。【结果】红色和黄色LED光照射下丝棉木金星尺蛾化蛹不具明显的节律性,14L∶10D组和14L∶10Y组的化蛹主要发生在光期,化蛹高峰分别在7:00-8:00和18:00-19:00;14L∶10R组主要在暗期化蛹,化蛹高峰在22:00-23:00;但暗期不同LED光处理对平均单时段化蛹率无显著影响。红色和黄色LED光照射下羽化节律亦不明显,14L∶10D组和14L∶10R组的雌雄成虫羽化主要发生在光期,14L∶10Y组雌雄成虫的羽化主要发生在暗期;14L∶10D组和14L∶10R组羽化高峰均在光期开启的第1-2小时;暗期LED光处理显著影响雌成虫平均单时段羽化率,且14L∶10D组光期雌成虫平均单时段羽化率显著高于暗期;暗期两个LED光处理对雄成虫平均单时段羽化率影响不显著。交配行为具有明显的节律性,各组交配行为均主要发生在暗期,交配高峰在光期开启前的1-2 h(4:00-6:00);14L∶10D组和14L∶10Y组暗期平均单时段交配率显著高于光期。产卵亦具有明显的节律性,14L∶10D组和14L∶10R组产卵高峰及4L∶10Y组产卵次高峰均发生在暗期20:00-21:00, 14L∶10Y组产卵高峰在16:00-17:00;暗期不同LED光处理对平均单时段产卵率均无显著影响。卵孵化具有明显的节律性,各组孵化高峰均在光期开始的第1小时;暗期不同LED光处理对平均单时段卵孵化率影响均不显著。【结论】红色和黄色LED处理下,丝棉木金星尺蛾化蛹和羽化不具明显的节律性,而交配、产卵及卵孵化具有明显的节律性,表明丝棉木金星尺蛾有的生命活动节律性受暗期LED光照影响,并因LED光色不同而异。

Key Issues for Modelling, Operation, Management and Diagnosis of Lithium Batteries: Current States and Prospects

1 Introduction.With the continuous growth of the global population,the energy demand continues to increase.However,due to the dominance of fossil fuels in global energy and fossil fuels are non-renewable,it has led to the global energy crisis[1].Besides,the use of fossil fuels will generate a mass of air pollutants(e.g.,carbon dioxide,sulfur dioxide,etc.),which will cause serious environmental pollution,climate change[2],etc.To resolve the aforementioned issues,countries around the world have implemented a variety of measures hoping to fundamentally adjust the global energy structure and achieve sustainable development.Thereinto,“Paris Agreement”reached in 2015 under the framework of“United Nations Framework Convention on Climate Change”aims to control the increase in the average temperature of the globe to within 2°C below preindustrial levels,and thereafter to peak global greenhouse gas emissions as soon as possible,continuously decreasing thereafter[3].United Kingdom plans to reduce the average exhaust emissions of“new cars”to approximately 50–70 g/km by 20230,which is roughly half of what it is now[4].In addition,China proposed a plan at“United Nations General Assembly”in 2020 to peak carbon dioxide emissions by 2030 and strive to achieve carbon neutrality by 2060.It is a fact that the whole world is committed to changing the current energy structure,protecting the Earth’s ecology,and achieving global sustainable development[5].

Operational mechanism of comprehensive benefit evaluation of existing building energy efficient renovation project based on value-added life

The comprehensive benefit evaluation of the existing building energy efficient renovation project cannot be separated from the scientific and effective evaluation mechanism.Based on the value-added life perspective,this paper analyzes the implementation subject,standard,system and principle of the comprehensive benefit evaluation of the existing building energy efficient renovation project.It plans the process of comprehensive benefit evaluation,and builds a scientific and reasonable operation platform of evaluation system,with a view to promoting the effective implementation of the comprehensive benefit evaluation of existing building energy-saving retrofits.

基于数字音频的LED显示屏运维数据识别技术

数字音频技术和发光二极管(Light Emitting Diode,LED)显示屏在现代社会中得到广泛应用,而对于LED显示屏的运维数据识别技术的研究日益受到关注。探讨基于数字音频的LED显示屏运维数据识别技术,以提高LED显示屏的运维效率和数据处理能力。首先,分析数字音频在LED显示屏监控中的重要性,探讨数字音频对LED显示屏故障诊断和性能监测的价值。其次,预处理数字音频,提出基于梅尔频率倒谱系数的数字音频特征提取方法。再次,提出一种基于注意力机制的端到端数字音频识别算法。最后,通过实验验证识别技术的有效性和实用性。结果表明,该技术能够有效地识别LED显示屏的各项数据,并对其状态和运行情况进行准确分析,为LED显示屏的运维工作提供重要的参考依据。

一种新型防爆LED灯管设计探讨

LED光源以其高效、节能、长寿命等优势得到广泛应用,随着工业领域对安全照明需求的日益增长,防爆LED灯管作为一种集安全性、高效能、长寿命于一体的新型照明设备,逐渐成为市场关注的焦点。探讨并设计一种高效节能、长寿命的防爆LED灯管,以满足复杂工业环境中的安全照明需求。

LED球泡灯光衰激活能评估方法

通过对BPZ 220/5 W JA55型阳光球泡灯进行额定功率下40℃和60℃温度应力加速寿命实验,分析了该款LED球泡灯的失效机理.通过推导激活能计算公式,建立了计算光衰激活能的理论模型,给出了测试LED球泡灯光衰激活能方法.通过实验测定该款球泡灯的光衰激活能数值为0.67 eV.

Quality of life in patients with liver cancer after operation:a 2-year follow-up study

BACKGROUND:Quality of life (QL) is a concept which reflects the physical, social, and emotional attitudes and behaviours of an individual. QL assessment is becoming in- creasingly recognised as an outcome and predictor for can- cer patients. Although hepatectomy has been widely ac- cepted as treatment of choice to offer a chance of cure for patients with liver cancer, little is known about the subjec- tive clinical results after this operation. This prospective study was designed to evaluate the Pre- and postoperative quality of life in patients with liver cancer. METHODS: The quality of life of 36 consecutive patients was measured using gastrointestinal quality of life index (GQLI) regularly 2 years after the operation, starting with a preoperative measurement. RESULTS: The score of mean preoperative GQLI was 106 ± 13 points, and it was reduced significantly 2-10 weeks after the operation (86-98) (P <0. 05-0.001). The quality of life recovered gradually. The GQLI score was 101 ± 21 points 4 months after operation and increased to the preo- perative level ( P > 0. 05 ). In the patients who survived more than 9 months, the GQLI score was higher than that before the operation. Major hepatectomy (lobectomy and combined segmentectomy) reduced the GQLI score more evidently than did minor hepatectomy (simple segmentec- tomy ) in 2-5 weeks after the operation (P <0.05). The age and preoperative liver function of the patients played an im- portant role in the recovery of the quality of life in the early postoperative stage (P <0.05). The patients with tumor re- currence showed a continuous decrease of the quality of life (P<0.05-0.001). CONCLUSIONS: The assessment of the quality of life is meaningful for patients with liver cancer. Tumor recur- rence, poor liver function and major operation are the most important factors for reducing the quality of life. He- patic resection is justified by its effects on the survival and the quality of life of the patients.

Prediction of Disc Cutter Life During Shield Tunneling with AI via the Incorporation of a Genetic Algorithm into a GMDH-Type Neural Network

Disc cutter consumption is a critical problem that influences work performance during shield tunneling processes and directly affects the cutter change decision.This study proposes a new model to estimate the disc cutter life(Hf)by integrating a group method of data handling(GMDH)-type neural network(NN)with a genetic algorithm(GA).The efficiency and effectiveness of the GMDH network structure are optimized by the GA,which enables each neuron to search for its optimum connections set from the previous layer.With the proposed model,monitoring data including the shield performance database,disc cutter consumption,geological conditions,and operational parameters can be analyzed.To verify the performance of the proposed model,a case study in China is presented and a database is adopted to illustrate the excellence of the hybrid model.The results indicate that the hybrid model predicts disc cutter life with high accuracy.The sensitivity analysis reveals that the penetration rate(PR)has a significant influence on disc cutter life.The results of this study can be beneficial in both the planning and construction stages of shield tunneling.

Life Cycle Energy Analysis of a Multifamily Residential House: A Case Study in Indian Context

The paper presents life cycle energy analysis of a multifamily residential house situated in Allahabad (U.P), India. The study covers energy for construction, operation, maintenance and demolition phases of the building. The selected building is a 4-storey concrete structured multifamily residential house comprising 44 apartments with usable floor area of 2960 m2. The material used for the building structure is steel reinforced concrete and envelope is made up of burnt clay brick masonry. Embodied energy of the building is calculated based on the embodied energy coefficients of building materials applicable in Indian context. Operating energy of the building is estimated using e-Quest energy simulation software. Results show that operating energy (89%) of the building is the largest contributor to life cycle energy of the building, followed by embodied energy (11%). Steel, cement and bricks are most significant materials in terms of contribution to the initial embodied energy profile. The life cycle energy intensity of the building is found to be 75 GJ/m2 and energy index 288 kWh/m2 years (primary). Use of aerated concrete blocks in the construction of walls and for covering roof has been examined as energy saving strategy and it is found that total life cycle energy demand of the building reduces by 9.7%. In addition, building integrated photo voltaic (PV) panels are found most promising for reduction (37%) in life cycle energy (primary) use of the building.

Fatigue Life Prediction of the Metro Bolster Beam under Complex Operating Conditions

Sixteen operating conditions were determined by the standards JIS-7105 and JIS-7106. The strength under complex operating conditions was calculated with HyperWorks and the strength analysis confirmed eight dangerous points of the metro bolster beam. Since the metro did not consider the impact of traffic lights and sudden road conditions, the load spectra at eight dangerous points were established by counting the running time,passenger flow,site layout,site quantity and turning situations. The fatigue life of the metro bolster beam was projected by the von Mises stress method and the critical plane method. The results of these two methods revealed that the maximum damage occurred at the dangerous point 7,and the fatigue life based on the critical plane method was shorter than that based on the von Mises stress method.Since the McDiarmid model considered the effect of the magnitude and direction of the normal stress and the amplitude of the shear stress,it is closer to the actual situations of the metro. Hence,the McDiarmid model based on the critical plane method is more reasonable,and the method of fatigue life prediction is also suitable to the metro bolster beam of other lines.

Deciphering the Quality of Life among Tuberculosis Patients under RNTCP in Karnataka, India

Background: The Tuberculosis (TB) disease has immense impact on physical, psychological, economic and social well-being of an individual. It is desired that the patient with any kind of TB disease should lead a respectable and happier life during their course of TB treatment. Currently, the quality of life (QOL) is an important indicator to assess the well-being of a person and there is paucity of such information among TB patients. Hence, we conducted to assess and compare the QOL of Revised National TB Control Programme registered Drug sensitive TB patients, Drug resistant TB patients and general population of Gadag district in Karnataka, India. Methods: A cross-sectional study was conducted in Gadag district, Karnataka from March 2017 through March 2018 among drug sensitive, drug resistant TB patients and general population. A Non-probability purposive sampling was adopted to select the samples that were matched for age, gender and ward. The select patients were administered WHO QOL-BREF questionnaire by trained personnel. Data were analyzed using SPSS version 12 analysis software. Results: The scores obtained for the four domains of QOL were (a) physical health: 69.62 + 18.29 (b) Psychological: 66.96 + 18.62 (c) Environment: 60.99 + 15.05 and (d) Social relationships: 53.5 + 19.93. Conclusions: The drug resistant TB patients have poor QOL when compared to drug sensitive and general population.

Effects of Operation Conditions on Service Life of Ladle Lining

Effects of operation conditions such as ladle temperature, remining time of molten steel, slag basicity, slag oxidation, slag viscosity , vacuum treatment, ultra-high temperature, gas blowing and stirring, intermittent operation, and different refining equipment on service life of ladle lining refractories were researched. The following conclusions are drawn ： （1） molten steel temperature rising, remaiaing time prolonging, slag oxidation ability enhancing, slag viscosity and basicity decreasing can aecelerate the corrosion of ladle lining ; （2） ultra-high temperature and vacuum treatment of ladle not only acceler- ate the fusion corrasion of ladle lining, but also make the carbon containing refractories react forming gases leading to more corrosion, so carbon containing refractories are not stdtable.for the smelting conditions of long term vacuum treatment and ultra-high temperature, especially carbon containing refractories added with conventional additives such as A1 and Si powders ; （ 3 ） argon blowing does not accelerate the corrosion of ladle lining obvioasly, but oxygen blowing does; （4） the corrosion degree of refractories varies with the refining equipment, and the service life of ladle lining decreases according to a certain proportion with the refining ratio increasing.

Secure Operation and Optimal Generation Scheduling Considering Battery Life for an Isolated Northwest Grid of Saudi Arabia

Maintenance schedule of generators in an interconnected power system presents multifaceted challenges, two important ones being optimal operation cost and secure operation. When a generator is scheduled for maintenance, achieving optimal generation scheduling for the committed generators is necessary but it is not sufficient for secure operation of power systems. This problem is decomposed into two subproblems: i) Finding the optimal set points for the generators;ii) Validating secure operation with those set points from i). Both these subproblems [i) and ii)] have been studied extensively in the literatures. However, the research here focuses on incorporating battery energy storage systems (BESS) in power operation, a renewable generation that can provide smooth and flexible reserves of power, an area that has not yet been fully explored. In addition, incorporating BESS while considering both the cost implications and addressing secure operation has not yet been addressed in previous literatures. The purpose of this paper is to present both secure and optimal operation besides improving the longevity of the BESS. Feasibility of the proposed approach is demonstrated on Tabuk region—an isolated northwest grid of Saudi Arabia.

Life Cycle Energy of Low Rise Residential Buildings in Indian Context

Life cycle energy of the building accounts for all energy inputs to the buildings during their intended service life. Buildings need to be constructed in such a way that energy consumption in their life cycle is minimal. Life Cycle Energy (LCE) consumption data of buildings is not available in public domain which is essentially required for building designers and policy makers to formulate strategies for reduction in LCE of buildings. The paper presents LCE of twenty (20) low rise residential buildings in Indian context. LCE of the studied buildings is varying from 160 - 380 kWh/m2 year (Primary). Based on the LCE data of studied buildings, an equation is proposed to readily reckon LCE of a new building.

基于环境温度的LED路灯寿命快速评估方法探讨

目的针对现有测试标准,分析LED路灯的寿命评估。方法本文使用相同工艺的LED组件产品作为试验样品,通过早期筛选之后的母体实现随机抽样,样品在10只以上,从而开展试验。结果LED灯具中电源寿命比较长,能够满足实际使用需求。

恒加试验下LED照明灯的三参数Weibull分布的参数估计

三参数Weibull分布拟合LED照明灯寿命的优势较为明显,但要得到三参数Weibull分布参数较为精确的点估计较为困难。目前常用的参数估计方法有极大似然法、矩估计法、Bayes估计法等,由于其计算的方程复杂,导致软件编程繁琐,不易掌握,而且也不一定能得到参数估计。鉴于此,文章针对恒加试验提出一种简便地求解三参数Weibull分布参数估计的方法,该方法不涉及超越方程的求解问题,软件编程相当简单,且统计思想清晰。通过LED照明灯恒加试验下的几个案例数据说明方法的应用,并与已有的方法做了对比分析。

潇河新城光储直柔LED照明系统关键技术研究

介绍山西潇河新城国际会展中心项目的光储直柔新型LED照明系统,系统采用放射状拓扑结构、单极接线方式,有DC 750 V和DC 220 V两个电压等级。系统保护配置方面,开发了集中式保护、主动监控保护装置等一系列新型直流保护装置。容量设计方面,光伏应装尽装,储能容量根据负荷功率和支撑时间决定。项目同时开发了一套系统监控管理系统,在实时监测系统运行状态的同时具备系统调度功能。运行结果显示,该工程项目具有较高的经济效益和社会效益。

子宫内膜异位症患者的中医慢病护理门诊管理

目的评价中医慢病护理门诊对子宫内膜异位症患者的管理效果。方法采用历史对照法,将2020年1-12月行腹腔镜手术的子宫内膜异位症门诊就诊的痛经患者88例作为对照组,按常规行术后门诊复诊及随访;2021年1-12月行腹腔镜手术的门诊就诊的88例痛经患者为观察组,在对照组基础上实施子宫内膜异位症中医慢病护理;干预3个月。干预后3、6、12个月评估干预效果。结果两组各85例患者完成研究及随访。两组痛经评分、自我管理能力评分及生存质量评分比较,组间效应、时间效应及交互效应差异有统计学意义(均P<0.05)。结论对子宫内膜异位症患者实施中医慢病护理门诊管理,可更有效地改善痛经症状,提高疾病自我管理能力和生存质量。

轨道交通车载乘客信息系统LED显示屏设计与应用

针对轨道交通行业发展特点、前景以及用户需求,分析车载广播系统中的LED显示设备的硬件设计和软件框架设计,并对LED显示设备在数字型乘客信息系统(Passenger Information System,PIS)平台上的研发方向进行简要分析和展望。基于STM32H743芯片设计轨道交通车载LED显示屏,通过乘客信息系统的PTU软件实现文本信息更新、网络升级、故障自检等功能,降低运维人力成本和系统故障率。