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关键词： 物联网   便携式超声设备   设备管理平台   使用效益  

摘要： 该研究利用物联网技术设计一全院便携式超声设备管理平台,结合数据采集装置对设备各种关键数据进行实时采集并通过医院无线网络传输至服务器进行存储和分析,不仅可监控设备的开关机时间、工作和空闲时间及各探头使用时间,还可可视化呈现设备的使用情况,并对不同科室设备的使用情况进行对比分析,以及对指标偏离设备进行监控记录,为医院设备精细化管理提供重要的数据支撑,优化使用管理,降低设备故障率,提高设备使用效益。

关键词： 天然气   站场工艺设备   预防维持   改进措施  

摘要： 近年来,我国对绿色经济的发展给予了足够的重视。与此同时,我国绿色能源的应用率也在显著提高。天然气作为一种经济性好的清洁能源,受到人们的广泛青睐和使用,给人们的日常生活带来了诸多便利。然而,在西气东输工程建设和开发过程中,我们发现,由于各种因素的影响,天然气站的风险逐渐凸显,对人们的生命安全构成了严重威胁。因此,本文针对天然气站设备运行中存在的缺陷和不足,提出了有效的改进方法和策略,以加强天然气站设备的使用和维护。目的是通过加强对天然气站设备的管理和规范使用,确保天然气站始终处于安全运行状态。

关键词： 设备管理   精细化   油田资产   闲置设备  

摘要： 在油田企业的经营中,由于企业本身有较大的特殊性,使企业中的固定资产无论是在类型还是在规模上都比较复杂,因此,为了实现高效率的经营发展,就要做好对这些资产设备的运行把控。在本文的分析中,主要基于当下油田资产设备精细化管理,从理论基础及现状出发,提出精细化管理的具体路径,为相关工作人员提供一定的参考。

关键词： 制药设备   管理   指标   维修方案   措施  

摘要： 随着科技的发展和我国社会经济的不断进步,人们对社会的要求也在逐渐的增高,尤其是关乎到我国人民健康服务的行业,为了满足人们的需求,这些行业需要在发展的过程中,不断的提升和增强才可以发挥他们的价值和作用。制药行业作为能够服务于广大群众的主要行业之一,随着社会的发展,无论是在技术方面,还是在制药行业的设备方面都在不断的增高,并且他在发展的过程中,非常受我国群众和社会的关注。本篇文章的撰写,主要是根据制药设备管理的主要指标和维修方案进行分析和研究,从设备维修、管理的目标和重要性出发,结合制药设备发展的现状,对其提出相关的解决意见和措施,希望能够使制药设备在当今这个信息化发展迅速的背景下得到改善和增强,在此同时各项标准也能够符合发展趋势,更好的服务于社会,服务于人民,展现制药设备管理的重要性,发挥制药行业在我国社会中发展的实际价值。

关键词： 机械故障检测   诊断结束   机电设备管理  

摘要： 工业企业的生产运行离不开机械设备的使用,同时机电设备的安全运行对于企业生产运行过程有着直接的影响。本文以煤矿机械设备研究为出发点,首先分析了机电设备机械故障产生原因以及故障检测诊断技术的特征,紧接着从不同方面论述了煤矿机电设备管理中故障检测诊断技术的应用,最后分析了大型内燃机设备维修控制内容。希望通过本文的研究可以使得企业在运行过程中出现故障的几率有所降低,保证整条生产线的安全生产。

关键词： 煤矿开采   机电设备管理   信息化管理  

摘要： 由于煤矿井下生产环境恶劣,机电设备会发生各种故障,严重威胁着煤矿的生产安全和生产效率。针对这一情况,很多煤矿都对机电设备进行了管理,然而由于各种原因,煤矿机电设备管理中存在的一些问题,使得机电事故时有发生。通过分析煤矿机电设备管理中存在的问题,提出了一些改进的策略,以期为日后相关工作提供一些参考。

关键词： 热电厂   电气设备   设备管理   维修养护  

摘要： 热电厂在我国的供热和发电中都是重要的组成部分,和人们的生产生活密切相关。目前我国的热电厂电气设备的运行当中仍然存在一些故障,主要存在于备用电源、发电机以及电气接地等多个环节,同时发电机温度过高也容易形成安全隐患,基于此,本文提出了一些热电厂电气设备的维修养护策略,并以此为基础进一步探讨了设备管理的要点,以供参考。

关键词： Sertoli cell   Spermatogenesis   Leydig cell   Testis   Androgen   ANDROGEN RECEPTOR FUNCTION   RETINOIC ACID METABOLISM   LEYDIG-CELLS   HORMONAL-REGULATION   ADULT-MOUSE   GERM-CELLS   FETAL   GENE   DIFFERENTIATION   FATE  

摘要： Sertoli cells are the orchestrators of spermatogenesis; they support fetal germ cell commitment to the male pathway and are essential for germ cell development, from maintenance of the spermatogonial stem cell niche and spermatogonial populations, through meiosis and spermiogeneis and to the final release of mature spermatids during spermiation. However, Sertoli cells are also emerging as key regulators of other testis somatic cells, including supporting peritubular myoid cell development in the pre-pubertal testis and supporting the function of the testicular vasculature and in contributing to testicular immune privilege. Sertoli cells also have a major role in regulating androgen production within the testis, by specifying interstitial cells to a steroidogenic fate, contributing to androgen production in the fetal testis, and supporting fetal and adult Leydig cell development and function. Here, we provide an overview of the specific roles for Sertoli cells in the testis and highlight how these cells are key drivers of testicular sperm output, and of adult testis size and optimal function of other testicular somatic cells, including the steroidogenic Leydig cells.

关键词： Aerial insectivore   Climate   Data integration   Demography   Global change   Land use   CLIMATE-CHANGE   TREE SWALLOWS   DYNAMICS   SURVIVAL  

摘要： Knowledge of demographic processes is essential for understanding population dynamics and developing appropriate conservation strategies under global change. However, it is often challenging to collect the necessary population and demographic data to understand population dynamics. Integrated population modeling (IPM) provides an opportunity to combine population survey and demographic data from different sources. We developed an IPM and applied it to jointly analyze 15 years (2004-2018) of regional North American Breeding Bird Survey and site-level capture-recapture and age-ratio data for a barn swallow (Hirundo rustica) population in Ontario, Canada. We aimed to identify key demographic parameters and tested hypothesized environmental drivers to understand population declines of this species. Our results showed that the study population had declined by about 2% annually during our study period, which was mainly contributed by changes in net immigration and adult apparent survival. In particular, low net immigration in a few years of our study period seemed to be the main reason of population decline. Furthermore, we found that warmer temperatures in April when barn swallows return to breeding grounds had a positive effect on adult survival, while warmer temperatures during the breeding period in May-June had a negative effect on productivity. Our results indicate vulnerability of the species to inclement weather during the breeding season, suggesting potential population recovery by adopting conservation strategies that buffer climatic threats. Moreover, our IPM provides a foundation for future monitoring programs that intend to combine and maximize the utility of large-scale population counts and fine-scale demographic data.

关键词： Low-power   High-speed   Rail-to-rail   Slew rate   Settling time   Current feedback   Compensation resistor   Stability   Output buffer   Source driver   OLED display   CLASS-B BUFFER   OUTPUT BUFFER   DUAL-PATH   AMPLIFIER  

摘要： In this work, we propose a rail-to-rail output buffer with low static-power and high speed for OLED display applications. To guarantee low static power consumption, low tail-current is designed in the buffer's first stage and the output stage is cut off in the static operation. To improve the transient response, dynamic-current-bias technique is used, and it also improves the system stability by pushing away the non-dominant pole. Meanwhile, we balance the large-signal slew-rate and system stability with dual-output buffer structure. Placing compensation resistor across the dual outputs creates zero for suitable phase margin, while the real output still behaves with low ON resistance and keeps high slew rate. The proposed design has been verified by a 0.18 mu m 1.8 V/5 V CMOS process, which shows that the buffer only draws 2.8-mu A static current. Under a 1-nF capacitance load and a 5-V power supply, the buffer achieves 1.18-mu s settling time, which is only 41% of the single-output-stage structure with the same chip size (52 mu m x59 mu m).