Lowering the Operational Voltage of Single-Layer Polymer Electroluminescent Devices by Using CuO_x Modifying Indium-Tin Oxide Electrode

In this study it is demonstrated that oxygen-plasma-generated CuOx can enhance the holes injection from ITO anode into polymer layer in single-layer polymer EL devices. The possible reason for this enhancement is because the ITO anode modified with CuOx possesses much higher work function than pure ITO anode, which reduces the barrier for hole-injection and further lowers the operational voltage of the polymer EL devices. The work function shift is probable due to the oxygen-plasma-generated CuOx can store more releasable oxygen, and the releasable oxygen in turn changes the oxygen concentration just near ITO surface, which will shift the work function of ITO anode.

Influence of preload discreteness on air-operated separation process of low-shock separation device

To investigate the influence of design parameters on the performance of separation device,the structure and air-operated test of a low-shock separation device are introduced and analyzed in this paper.According to the law of energy conservation and aerodynamics,a mathematical model is built.Because the preload used to ensure the connection reliability has the discreteness,which will influence the separation process,the influence of preload discreteness on the air-operated separation process is simulated and tested.Simulation results are consistent with the experimental results.It is shown that the change of preload has an obvious influence on the separation process.The study is useful for the design and optimization of separation device.

Disposable circumcision suture device： clinical effect and patient satisfaction

In our experience patients undergoing circumcision are mostly concerned about pain and penile appearances. We conducted a prospective randomized trial to assess the benefits of a new disposable circumcision suture device （DCSD）. A total of 942 patients were equally divided into three groups （conventional circumcision, Shang ring and disposable suture device group）. Patients in the DCSD group were anesthetized with compound 5% lidocaine cream, the others with a 2% lidocaine penile block. Operation time, intra-operative blood loss, incision healing time, intra-operative and post-operative pain, the penile appearance and overall satisfaction degree were measured. Operation time and intra-operative blood loss were significantly lower in the Shang ring and suture device groups compared to the conventional group （P 〈 0.001）. Intra-operative pain was less in the suture device group compared With the other two groups （P 〈 0.001）; whereas post-operative pain was higher in the conventional group compared to the other two groups （P 〈 0.001）. Patients in the suture device （80.57%） and Shang ring （73,57%） groups were more satisfied with penile appearances compared with the conventional circumcision group （20.06%, P 〈 0.05）. Patients in suture device group also healed markedly faster than the conventional group （P 〈 0.01）. The overall satisfaction rate was better in the suture device group （78.66%） compared with the conventional （47.13%） and Shang ring （50.00%） groups （P 〈 0.05）. The combination of DCSD and lidocaine cream resulted in shorter operation and incision healing times, reduced intra-operative and post-operative pain and improved patient satisfaction with the cosmetic appearances.

Development of the Embedded Protective Device Based on ARM

An embedded protective device for 35kV power line is worked out based on Philips’ LPC2292 ARM MCU. Several aspects such as embedded design technique adopted in the system framework, application of adaptive theory in data acquisition, Board Support Packet (BSP) developing and task dispatching related to operating system are discussed. Both hardware and software framework of the system are given. Advanced hardware platform and software development environment is applied in design of the system, with the advanced co-design technology.

Research and implementation of I^2C device driver under embedded Linux system

As an universal bus technology at present time, I2C has been widely used in the interface between CPU and other devices such as EEPROM, RTC and small LCD. The architecture of I2C driver, the relationship of some important data structure and the operation mechanism of the I2C driver have been analyzed. Finally, by taking an EEPROM chip named AT24C08 as a specific example, the flow of how to develop an I2C device driver is illustrated. In addition, the design of a new driver mode of single device with multi-drivers is realized.

高压断路器操动机构驱动电机及其控制技术研究

高压断路器操动机构用电机驱动提高了断路器运行的可靠性与可控性,因此设计了一套适用于126 kV真空断路器的电机操动机构。基于操动机构动力学分析结果确定驱动电机转矩、转速要求,提出一种有限转角永磁无刷电机设计方案,研制样机进行联机试验完成动作要求检验。在此基础上,设计分段转矩控制策略,结合驱动电机输出转矩需求将操动机构的运动过程分为4个阶段,从降低触头碰撞、避免预击穿现象发生、提高断路器工作可靠性角度对各阶段电机输出转矩进行动态调节。结果表明:所研制的驱动电机配合分段转矩控制策略,在保证灭弧室对操动机构动作时间、动作速度要求的前提下,实现了操动机构的运动过程优化和工作可靠性提高,促进了断路器智能化操作进程。

手术室护士预防医疗器械相关压力性损伤知信行现状及影响因素分析

目的探究手术室护士预防医疗器械相关压力性损伤的知信行现状,并分析其影响因素。方法采用便利抽样和整群抽样结合的方法,于2022年8至12月选取浙江省内不同地区二级及以上医院的手术室护士620名为研究对象,采用自制的手术室护士医疗器械相关压力性损伤知信行量表进行横断面调查,采用多元线性回归分析手术室护士预防器械相关压力性损伤知信行的影响因素。结果问卷有效回收率99.84%。浙江省手术室护士预防医疗器械相关压力性损伤知信行总分为(76.90±26.15)分,知识维度得分为(34.82±10.34)分,信念态度维度得分为(13.69±4.72)分,行为维度得分为(28.39±10.49)分。回归分析结果显示,医院类型、职称是手术室护士预防器械相关压力性损伤知信行水平的主要影响因素(均P<0.001)。结论浙江省手术室护士预防医疗器械相关压力性损伤知信行水平较低,主要受医院类型、职称的影响。因此,管理者需要通过多种途径为护理人员进行相关知识的培训,提高其行为能力,以降低医疗器械相关性压力性损伤的发生。

考虑含HRD的光热电站和综合需求响应的综合能源系统低碳经济调度

在“双碳”的背景下,为进一步提升综合能源系统(Integrated Energy System, IES)的经济性和环境效益,文中提出一种在奖惩阶梯型碳交易机制下考虑含热回收装置(Heat Recycling Device, HRD)的光热电站和综合需求响应的IES系统低碳经济调度方法。首先,在源侧构建含热回收装置的光热电站与加装碳捕集的热电联产机组联合运行的IES架构,并分析电转气两阶段的运行原理,建立计及余热回收的电转气设备模型。其次,考虑到负荷侧电、热、气三种负荷的柔性特性,在负荷侧建立电热气综合需求响应模型。最后,引入奖惩阶梯型碳交易机制,进一步减小系统碳排放量,构建调度周期内以含购能成本、运维成本、碳交易成本等系统总运行成本最小为目标的综合能源系统低碳优化调度模型。通过算例分析结果表明,所提方法不仅能提高机组的运行潜力,而且有效降低了系统总运行成本与碳排放量。

精细化管理在手术室骨科外来器械与植入物中的应用

目的探讨精细化管理在骨科外来器械与植入物管理中的应用效果。方法将2022年1月-3月进行的1275例骨科植入物手术设为对照组,将2022年4月-6月进行的骨科植入物手术1023例设为干预组,对照组采用常规的骨科手术配合管理模式,干预组采用精细化管理模式。结果干预组外来器械与植入物管理质量均明显高于对照组(均P<0.05),术中清点意外事件发生率显著低于对照组(P<0.05)。结论精细化管理能有效实施骨科外来器械与植入物的环节控制,显著提升外来器械与植入物管理质量,同时降低术中清点意外事件发生率。

模板运算代码的自动生成与调优框架

针对现有模板代码生成方法不支持多图形处理器(GPU)、调优不充分等问题,提出一种由领域专用语言(DSL)描述的模板代码的自动生成与调优框架。在代码自动生成阶段,该框架能够自动解析上层提供的描述语言,构建计算图进而生成模板运算的统一计算设备架构(CUDA)核函数,同时根据单GPU或多GPU环境生成不同的主机端代码。在代码调优阶段,根据不同的GPU型号确定候选参数范围,动态调用生成的CUDA核函数以确定最优参数。在多GPU的情况下,自动生成的主机端代码能够使用计算与通信重叠的方法进行边界数据交换。在4种不同的GPU与7、13、19、27点模板运算中,该框架能找到最优的参数配置。实验结果表明,对于Tesla V100-SXM2,以调优过的参数进行模板运算,该框架在单精度4种模板运算下的每秒万亿次浮点运算数(TFLOPs)分别为1.230、1.680、1.120、1.480,在双精度下分别为0.690、1.010、0.480、1.470,平均性能达到手工优化代码的98%,并且描述更简单,支持多GPU扩展。

持续质量改进预防手术室医疗器械相关性压力性损伤的效果

目的探讨持续质量改进在手术室医疗器械相关性压力性损伤中的预防效果。方法选择2022年3月—2023年2月南方医科大学第七附属医院接收的200例手术患者为研究对象,按照入院时间先后顺序分组,各100例,2022年3—8月收治的患者为对照组,2022年9月—2023年2月收治的患者为观察组。对照组采用常规方式进行管理,观察组采用持续质量改进的方式进行管理。对比2组手术室医疗器械相关性压力性损伤的发生率,分析2组患者的住院时间以及手术时间差异。结果观察组手术室医疗器械相关性压力性损伤的发生率为2.00%,低于对照组的17.00%,差异有统计学意义(P<0.05)。观察组患者的住院时间以及手术时间短于对照组,差异有统计学意义(P<0.05)。结论采用持续质量改进在手术室医疗器械相关性压力性损伤预防的过程中,能降低患者出现手术室医疗器械相关性压力性损伤的发生率,缩短患者的手术时间以及住院时间。

巷道破底工作面机头收煤装置设计

为解决当前巷道破底工作面漏煤问题,通过对现有设备的结构特点及存在的问题进行分析,设计出一种巷道破底工作面机头收煤装置。该装置不仅可以有效地收集漏落的煤块,而且还可以提供采煤机维修操作空间,有效改善井下工人的工作环境,降低安全隐患,使得智能化工作面快速推进,从而为煤矿高产、高效提供有力支持。

SPD助力手术室高值医用耗材精细化管理

对生产厂家、供应商、物流公司、设备物资科及手术室进行规范化管理,利用SPD医用耗材管理系统及智能感知柜管理系统,改变原有手术室高值医用耗材逆向物流的模式,建立院内手术室高值医用耗材的正向物流管理模式及追溯机制,以降低临床医用耗材管理工作强度,实现高值医用耗材可视化管理和精细化管理,为医院进行科学合理的宏观调控提供可靠准确的信息,在保证高值医用耗材使用快捷的同时,最大限度地保证手术室高值医用耗材在使用中的安全性及可追溯性。

多工况下的液驱多维力加载装置主轴速度控制

不同工况引起加载力之间的耦合效应降低了速度控制效果,为了更加精准控制不同工况下的主轴速度,提出一种多工况下的液驱多维力加载装置主轴速度控制方法。计算多工况下的液驱多维力加载装置主轴速度,以此作为控制器设计输入。在多种工况下,将液驱多维力加载装置主轴输入和输出速度之间的差值作为输入信号,通过模糊推理算法改进经典PID控制器,通过模糊检测调整改进后的控制器组建模糊自适应PID控制器,实现速度自适应控制。通过实验测试证明,所提方法可以精准地完成液驱多维力加载装置主轴速度控制,受工况影响较小。

基于临时支护新装置的工序优化与支护性能分析

针对掘进工作面存在的掘支平行作业难、用时比重失调问题,为实现平行作业、快速支护,设计了新的临时支护装置,具有尺寸可调、快速响应、及时支护的特点。采用理论分析加数值模拟的方法进行研究;介绍了装置的结构设计;以新巨龙煤矿综掘施工技术为例进行工艺优化,从理论上提出一种分区平行作业的施工技术;通过顶板两端简支岩梁力学模型,展开装置临时支护作用机理分析;并对装置的支护性能进行结构静力学分析。结果表明:在巷道顶板松动范围0~3.30 m时,装置支护所需承受的载荷为158.40 kN;仿真得到最大等效应力为57.37 MPa,在装置顶梁下端与耳座位置交接处,最大位移量出现在中间梁上端中部,为0.30 mm,装置的结构设计能满足支护要求。此研究可为实现快速掘进的平行作业,高效支护和安全生产,提供有益参考。

升船机电气传动系统应急运行研究

齿轮齿条爬升式垂直升船机一般采用四点均匀驱动承船厢升降,4套驱动装置通过同步轴系统刚性连接,正常工况下四个驱动点保持同步运行,同步轴受力很小。由于承船厢重量与平衡重重量基本一致,驱动装置处于轻载状态。在保证各驱动点电机不过载和同步轴力矩不超标的条件下,本研究项目旨在论证和试验在1套电气传动装置(电机+变频器)故障退出情况下,其余3套驱动装置能否继续运行,以提高升船机运行的整体可靠性。通过理论计算,在承船厢误载水深控制在±5 cm的范围内,3台电机的出力可以驱动承船厢运行。在对电气传动系统控制架构进行调整后,实现了任意一套传动机构退出后,其余3套驱动装置继续运行的功能,并且同步轴扭矩保持在允许范围内。

Optimal scheduling of a township integrated-energy system using the adjustable heat-electricity ratio model

With the expansion and implementation of rural revitalization strategies,there is a constant need for new energy sources for the construction of new townships.Consequently,integrated energy systems with the interconnection and interaction of multiple energy sources are developing rapidly.Biomass energy,a renewable green energy source with low pollution and wide distribution,has significant application potential in integrated energy systems.Considering the application of biomass energy in townships,this study established an integrated biomass energy system and proposed a model to optimize its operation.Lowest economic cost and highest clean energy utilization rate were considered as the objective functions.In addition,a plan was suggested to adjust the heat-electricity ratio based on the characteristics of the combined heat and power of the biomass.Finally,a simulation analysis conducted for a town in China was discussed,demonstrating that the construction of a township integrated-energy system and the use of biomass can significantly reduce operating costs and improve the energy utilization rate.Moreover,by adjusting the heat-electricity ratio,the economic cost was further reduced by 6.70%,whereas the clean energy utilization rate was increased by 5.14%.

Metal-Halide Perovskite Submicrometer-Thick Films for Ultra-Stable Self-Powered Direct X-Ray Detectors

Metal-halide perovskites are revolutionizing the world of X-ray detectors,due to the development of sensitive,fast,and cost-effective devices.Self-powered operation,ensuring portability and low power consumption,has also been recently demonstrated in both bulk materials and thin films.However,the signal stability and repeatability under continuous X-ray exposure has only been tested up to a few hours,often reporting degradation of the detection performance.Here it is shown that self-powered direct X-ray detectors,fabricated starting from a FAPbBr_(3)submicrometer-thick film deposition onto a mesoporous TiO_(2)scaffold,can withstand a 26-day uninterrupted X-ray exposure with negligible signal loss,demonstrating ultra-high operational stability and excellent repeatability.No structural modification is observed after irradiation with a total ionizing dose of almost 200 Gy,revealing an unexpectedly high radiation hardness for a metal-halide perovskite thin film.In addition,trap-assisted photoconductive gain enabled the device to achieve a record bulk sensitivity of 7.28 C Gy^(−1)cm^(−3)at 0 V,an unprecedented value in the field of thin-film-based photoconductors and photodiodes for“hard”X-rays.Finally,prototypal validation under the X-ray beam produced by a medical linear accelerator for cancer treatment is also introduced.

计及碳交易的热电联产-储热-电锅炉风电消纳策略

为解决传统热电联产机组的热电耦合特性以及冬季采暖期间弃风消纳问题,提出了计及碳交易含储热热电联产机组和电锅炉联合运行的弃风消纳策略。首先将储热设备、电锅炉与热电联产机组联合运行来满足系统所需热负荷,从而提高热电联产机组电调峰能力。其次,为进一步控制碳排放量,引入阶梯式碳交易与优化电锅炉运行模式,兼顾系统运行成本、弃风消纳量以及碳排放量,构建计及碳交易的热电联产-储热-电锅炉风电消纳模型并进行求解。最后,以IEEE-30节点为例进行算例分析,结果表明所提策略能够有效促进风电消纳、减少碳排放量且有效降低系统运行成本。

手术室器械相关压力性损伤预防的最佳证据总结

目的检索、评价并整合手术患者器械相关压力性损伤预防的相关证据,为临床实践提供参考。方法系统检索国内外计算机决策支持系统、指南网、压力性损伤专业学术网站以及综合数据库中关于预防手术患者器械相关压力性损伤的相关文献,文献类型包括临床决策、指南、专家共识、证据总结、系统评价、Meta分析、随机对照试验。检索时限为建库至2023年10月。循证团队对文献进行方法学质量评价,并根据主题对证据进行提取与汇总。结果共纳入10篇文献,其中指南3篇、专家共识4篇、系统评价2篇、随机对照试验1篇。从风险评估、器械的选择和使用、预防策略、术后交接与记录、教育与培训5个方面总结出23条最佳证据。结论整合的手术患者器械相关压力性损伤预防最佳证据为医护人员提供了循证依据,但证据使用者应基于前期充分的风险评估,结合手术室具体情境调整预防策略,以降低器械相关压力性损伤发生率。