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关键词： 垃圾分类   快递包装   回收再利用   模糊综合评价法  

摘要： 随着电商行业的迅速崛起,快递量逐年激增。快递业务在拉动消费促进经济增长的同时也带来了一定负面影响,如快递包装因没有及时回收处理带来的资源浪费、环境污染等问题。与此同时,循环经济、绿色物流、垃圾分类等理念先后提出,使快递包装回收再利用体系的构建与完善也成为社会各界探讨的焦点。通过对垃圾分类大背景下我国快递包装回收再利用发展现状和影响因素的分析,提出快递包装回收再利用的三种模式,即以制造商为主导的快递包装回收模式、以快递企业为主导的快递包装回收模式和以垃圾回收站为主导的回收模式,借助模糊综合评价法和SPSSAUE在线数据分析确定最佳模式。最后从政府、企业和个人等层面提出快递包装回收再利用的实施策略。

关键词： 动物   检验检疫   食品安全  

摘要： 近年来,人们对肉类食品的需求不断提高,这也对肉类食品的品质提出了更高的要求,在动物饲养、屠宰、加工、运输到进入市场的各个环节,都需要进行更高水平的要求,以此来确保进入市场的肉类食品能够安全,能够健康,保障消费者的身体健康,因此加强动物的检验检疫工作是至关重要的,本文就针对动物检验检疫在食品安全中的作用展开了一定的讨论研究。

关键词： 外卖垃圾包装   垃圾分类   对策   可持续发展  

摘要： 随着移动互联网的快速普及,线上外卖下单的用户极具规模的增多,随之而产生的外卖包装垃圾也极大地增加垃圾处理的工作难度。网络订餐这种新型的模式虽然方便了消费者,但是也在其中制造了很多的外卖垃圾,给我们的环境造成了极大的困扰。本文选取宿州市宿州学院为案例,通过问卷调查和实地考察等方式,分析了校园外卖食品垃圾收集与分类的实践情况,并且针对性地提出了其中的可行性和改进措施。

关键词： PDCA循环   检验科   危险化学品   安全管理  

摘要： 目的:探究PDCA循环管理法在改进检验科危险化学品管理水平中的作用。方法:医院高度重视危险化学品安全管理工作,为了提高检验科危险化学品管理水平,检验科工作人员从2019年7月开始采用PDCA循环管理法开展危险化学品管理改进工作,2019年1~6月为实施前,2019年7~12月为实施后,比较实施前后的管理效果。结果:实施后检验科危险化学品标识率、储存合格率、出入库登记完整率、安全数据表配置率等,均显著高于实施前(P<0.05)。实施后检验科工作人员危险化学品管理知识考核评分,显著高于实施前(P<0.05)。实施后检验科工作人员危险化学品安全操作考核优良率,显著高于实施前(P<0.05)。结论:PDCA循环管理法能够有效提高检验科危险化学品管理水平,控制危险化学品安全管理风险,保障检验科工作人员及患者安全,保障医院的安全运行。

关键词： Detection   Edge devices   Interference   Jamming   Machine learning   Security   WSNs and ZigBee  

摘要： Despite Wireless Sensor Networks (WSNs) significantly developing over the past decade, these networks, like most wireless networks, remain susceptible to malicious interference and spectrum coexistence. Other vulnerabilities arise as WSN applications adopt open standards and typically resource and energy-constrained commercial-off-the-shelf equipment. Deployments include safety-critical applications such as the internet of things, medical, aerospace and space and deep-sea exploration. To manage safety and privacy requirements across such a diverse wireless landscape, security on wireless edge devices needs improvement while maintaining low complexity. This paper improves wireless edge device security by developing a novel intelligent interference diagnostic framework. Received in-phase (I) and quadrature-phase (Q) samples are exclusively utilized to detect modern, subtle and traditional crude jamming attacks. This I/Q sample utilization inherently enables decentralized decision-making, where the low-order features were extracted in a previous study focused on classifying typical 2.4-2.5 GHz wireless signals. The associated optimal intelligent models are leveraged as the foundation for this paper's work. Initially, Matlab Monte Carlo simulations investigate the ideal case, which incorporates no hardware limitations, identifies the required data type of signal interactions and motivates a hardware investigation. Software-defined radios (SDRs) collect the required live over-the air I/Q data and transmit matched signal (ZigBee) and continuous-wave interference in developed ZigBee wireless testbeds. Low complexity supervised machine learning models are developed based exclusively on the low-order features and achieve an average accuracy among the developed models above 98%. The designed methodology involves examining ZigBee over-the-air data for artificial jamming and SDR jamming of ZigBee signals transmitted from SDR and commercial (XBee) sources. This approach expands

关键词： 变更合同   劳动合同   默示   书面形式   民法典   销售部经理   电子邮件   书面方式  

摘要： 导读之声在实践中,不少用人单位在变更劳动合同时并未采用书面方式,而是采用默示的方式。那么,什么样的默示变更是有效的呢?民法典和有关法律是如何规定的呢?故事聚焦汤某原是某公司销售部经理,因连续2个月未能完成公司规定的销售任务,公司就决定将他调整到售后服务部任经理,月工资减少1000元,并给他发送电子邮件说明了调岗降薪事宜,汤某对此既未回复邮件也未提出异议,并于接到电子邮件的第三天赴任售后服务部经理。

关键词： 安全生产检测检验   矿山安全生产   作用  

摘要： 在不断实践和检验安全生产理念的过程中,矿山安全生产也受到了相关专业部门的重视。因此为了提高矿山施工作业的安全性,为施工监理提供有效的技术支持,安全生产检验检测技术在矿山技术中得到了广泛应用。为探究安全生产检验检测技术的真正价值,本文将对该技术在矿山安全生产中的性能和作用进行分析说明。

关键词： ICP OES   Machine learning   Sample digestion   SHAP   Used engine oil   XGBoost  

摘要： The analysis of used engine oils from industrial engines enables the study of engine wear and oil degradation in order to evaluate the necessity of oil changes. As the matrix composition of an engine oil strongly depends on its intended application, meaningful diagnostic oil analyses bear considerable challenges. Owing to the broad spectrum of available oil matrices, we have evaluated the applicability of using an internal standard and/or preceding sample digestion for elemental analysis of used engine oils via inductively coupled plasma optical emission spectroscopy (ICP OES). Elements originating from both wear particles and additives as well as particle size influence could be clearly recognized by their distinct digestion behaviour. While a precise determination of most wear elements can be achieved in oily matrix, the measurement of additives is performed preferably after sample digestion. Considering a dataset of physicochemical parameters and elemental composition for several hundred used engine oils, we have further investigated the feasibility of predicting the identity and overall condition of an unknown combustion engine using the machine learning system XGBoost. A maximum accuracy of 89.6% in predicting the engine type was achieved, a mean error of less than 10% of the observed timeframe in predicting the oil running time and even less than 4% for the total engine running time, based purely on common oil check data. Furthermore, obstacles and possibilities to improve the performance of the machine learning models were analysed and the factors that enabled the prediction were explored with SHapley Additive exPlanation (SHAP). Our results demonstrate that both the identification of an unknown engine as well as a lifetime assessment can be performed for a first estimation of the actual sample without requiring meticulous documentation.

关键词： 临床检验   质量控制   作用   对策  

摘要： 目的分析在临床医学检验管理中存在的薄弱环节和问题,并提出有效质量控制对策。方法于2020年4月—2021年4月期间对该院临床医学检验科全体37名医护人员实施加强质量控制,分析实施前后该院临床医学检验质量的区别。结果随机选取实施前后各100份检验结果进行分析对比,发现实施后该院临床医学各检验项目的合格率要明显高于实施前;所有医护人员对检验质量管理基础知识的掌握情况要明显优于实施前,差异有统计学意义(P<0.05)。结论该院临床医学检验存在的主要质量问题可从制度、人员、仪器设备、监管等方面进行改善,经质量控制后该院医学检验结果合格率不仅有了明显提高,临床检验相关医护人员对检验质量管理知识的水平也有了明显提高。

关键词： 质量监督   纺织品   连续   控制  

摘要： 从质量监督的范围、质量监督内容和质量监督员任命等方面阐述了质量监督在纺织品检验检测中的作用。作为检验检测机构确保质量的一种行为,需要从“人、机、料、法、环、测”等六个要素对纺织品检验检测进行监督,保证实验室长期连续稳定地符合检验检测认定评审准则要求,确保结果数据真实、客观、准确、有效。