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碱水解法测定乳粉中脂肪能力验证的分析与研究

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食品工业 2024年第3期45卷 156-158页

作者：孙路明邢雪岩刘君王璐杨滨银阿克苏地区疾病预防控制中心阿克苏843000

实验室间能力比对是实验室外部质量控制的有效形式,参加能力验证,不仅可以提升检测机构技术检测水平和检测技术人员的操作技能,还可以了解实验室自身的不足与差距,进而采取相应的纠正和改进措施。每年有资质的检测机构都必须参加相应的... 详细信息

实验室间能力比对是实验室外部质量控制的有效形式,参加能力验证,不仅可以提升检测机构技术检测水平和检测技术人员的操作技能,还可以了解实验室自身的不足与差距,进而采取相应的纠正和改进措施。每年有资质的检测机构都必须参加相应的能力验证。通过能力验证对于每个检测机构都有着十分重要的意义。文章总结概括了用碱水解法测定乳粉中脂肪,顺利通过食品检测能力验证所需要注意的考核前准备和实验操作中的关键步骤,为碱水解法测定乳粉中脂肪能力验证工作提供参考。

关键词：能力验证乳粉中脂肪注意事项

麻醉护理硕士专业学位研究生临床实践课程体系构建

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国际麻醉学与复苏杂志 2024年第6期45卷 667-672页

作者：邢雪燕张欢周芳胡嘉乐杨婷婷涂淑敏清华大学临床医学院清华大学附属北京清华长庚医院麻醉科北京102218 徐州医科大学护理学院徐州221004 弗吉尼亚联邦大学麻醉护理学院里士满23284 郑州大学附属郑州中心医院护理部郑州450007

目的构建麻醉方向护理专业学位研究生(MNS)临床实践课程体系。方法以我国《专业学位类别(领域)博士、硕士学位基本要求》及国卫办医函〔2019〕884号文件为指导,参照国际麻醉护士联盟(IFNA)提出的核心能力标准以及我国麻醉方向MNS核心能... 详细信息

目的构建麻醉方向护理专业学位研究生(MNS)临床实践课程体系。方法以我国《专业学位类别(领域)博士、硕士学位基本要求》及国卫办医函〔2019〕884号文件为指导,参照国际麻醉护士联盟(IFNA)提出的核心能力标准以及我国麻醉方向MNS核心能力要求,运用加拿大医师能力框架(CanMEDS)理论框架结合文献回顾、半结构访谈结果,拟定麻醉方向MNS临床实践课程体系专家函询问卷,采用德尔菲法进行专家函询。结果对23名专家进行2轮函询,问卷有效回收率分别为91.30%和95.24%;专家权威系数均为0.94;2轮专家函询的肯德尔协调系数分别为0.098和0.108,差异有统计学意义(P<0.001),最终形成11个一级指标、46个二级指标组成的麻醉方向MNS临床实践课程体系。结论麻醉方向MNS临床实践课程体系可借鉴性强,且构建过程科学、可靠,可为麻醉方向MNS的临床培养提供借鉴与指导。

关键词：麻醉护理专业学位研究生临床实践课程体系德尔菲法

Safety assessment of a novel marine multi-stress-tolerant yeast Meyerozyma guilliermondii GXDK6 according to phenotype and whole genome-sequencing analysis

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Food Science and Human Wellness 2024年第4期13卷 2048-2059页

作者： xueyan Mo Mengcheng Zhou Yanmei Li Lili Yu Huashang Bai Peihong Shen xing Zhou Haojun Zhu Huijie Sun Ru Bu Chengjian Jiang State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources Guangxi Research Center for Microbial and Enzyme Engineering TechnologyCollege of Life Science and TechnologyGuangxi UniversityNanning 530004China National Engineering Research Center for Non-Food Biorefinery State Key Laboratory of Non-Food Biomass and Enzyme TechnologyGuangxi Research Center for Biological Science and TechnologyGuangxi Academy of SciencesNanning 530007China Guangxi Key Laboratory for Green Processing of Sugar Resources College of Biological and Chemical EngineeringGuangxi University of Science and TechnologyLiuzhou 545006China

The application of microorganisms as probiotics is limited due to lack of safety ***,a novel multi-stress-tolerant yeast Meyerozyma guilliermondii GXDK6 with aroma-producing properties was identified from marine mangrove *** safety and probiotic properties were assessed in accordance with phenotype and whole-genome sequencing *** showed that the genes and phenotypic expression of related virulence,antibiotic resistance and retroelement were rarely *** morphogenesis genes(SIT4,HOG1,SPA2,ERK1,ICL1,CST20,HSP104,TPS1,and RHO1)and phospholipase secretion gene(VPS4)were *** hyphae and phospholipase were *** one retroelement(Tad1-65_BG)was *** biogenic amines(BAs)encoding genes were absent,except for spermidine synthase(JA9_002594),spermine synthase(JA9_004690),and tyrosine decarboxylase(inx).The production of single BAs and total BAs was far below the food-defined ***6 had no resistance to common antifungal *** enzymes,such as gelatinase,DNase,hemolytic,lecithinase,and thrombin were *** toxicity test with mice demonstrated that GXDK6 is ***6 has a good reproduction ability in the simulation gastrointestinal ***6 also has a strong antioxidant ability,β-glucosidase,and inulinase *** sum up,GXDK6 is considered as a safe probiotic for human consumption and food fermentation.

关键词： Meyerozyma guilliermondii Safety assessment Probiotics Marine mangrove microorganisms Whole-genome sequencing analysis

一例全身麻醉非眼科手术患者角膜擦伤的根本原因分析与改进

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麻醉安全与质控 2024年第2期6卷 89-92页

作者：邢雪燕王飞刘鑫雨刘筱璨郭晓慧严思益肖博苏博兴涂淑敏清华大学临床医学院清华大学附属北京清华长庚医院麻醉科北京102218 清华大学临床医学院清华大学附属北京清华长庚医院泌尿外科北京102218

对1例全身麻醉非眼科手术患者角膜擦伤事件进行根本原因分析。按照问题定义与事件描述,识别可能原因,剖析根本原因,制定并执行改进措施的步骤,完整呈现“全身麻醉非眼科手术患者角膜擦伤”事件根本原因分析的全过程。从针对心电监护操... 详细信息

对1例全身麻醉非眼科手术患者角膜擦伤事件进行根本原因分析。按照问题定义与事件描述,识别可能原因,剖析根本原因,制定并执行改进措施的步骤,完整呈现“全身麻醉非眼科手术患者角膜擦伤”事件根本原因分析的全过程。从针对心电监护操作建立督导及考核机制,加强麻醉护理人员面罩通气手法的培训,科室规范中增加面罩通气期间的眼睛保护措施,并针对特殊手术体位的眼睛保护措施等方面加以改进,取得了较好效果。为临床管理者提供质量管理的思路与方法,以便更好地识别系统中的问题,制定针对性的改善计划与预防措施。

关键词：全身麻醉非眼科手术角膜擦伤根本原因分析

Reinforcement Learning-Based Dynamic Order Recommendation for On-Demand Food Delivery

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Tsinghua Science and Technology 2024年第2期29卷 356-367页

作者： xing Wang Ling Wang Chenxin Dong Hao Ren Ke xing Department of Automation Tsinghua UniversityBeijing 100080China School of Mechanical and Automotive Engineering Qingdao Hengxing University of Science and TechnologyQingdao 266100China Meituan Beijing 100015China

On-demand food delivery(OFD)is gaining more and more popularity in modern *** a kernel order assignment manner in OFD scenario,order recommendation directly influences the delivery efficiency of the platform and the delivery experience of *** paper addresses the dynamism of the order recommendation problem and proposes a reinforcement learning solution *** actor-critic network based on long short term memory(LSTM)unit is designed to deal with the order-grabbing conflict between different ***,three rider sequencing rules are accordingly proposed to match different time steps of the LSTM unit with different *** test the performance of the proposed method,extensive experiments are conducted based on real data from Meituan delivery *** results demonstrate that the proposed reinforcement learning based order recommendation method can significantly increase the number of grabbed orders and reduce the number of order-grabbing conflicts,resulting in better delivery efficiency and experience for the platform and riders.

关键词： on-demand food delivery order recommendation reinforcement learning actor-critic network long short term memory

Needs and challenges of optical atmospheric monitoring on the background of carbon neutrality in China

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Frontiers of Environmental Science & Engineering 2024年第6期18卷 49-62页

作者： Wenqing Liu Chengzhi xing Anhui Institute of Optics and Fine Mechanics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 23001China

The achievement of the targets of coordinated control of PM2.5 and O3 and the carbon peaking and carbon neutrality depend on the development of pollution and greenhouse gas monitoring *** monitoring technology,based on its technical characteristics of high scalability,high sensitivity and wide-targets detection,has obvious advantages in pollution/greenhouse gases monitoring and has become an important direction in the development of environmental monitoring *** present,a system of environmental optical monitoring technology with differential optical absorption spectroscopy(DOAS),cavity ring-down spectroscopy(CRDS),light detection and ranging(LIDAR),laser heterodyne spectroscopy(LHS),tunable diode laser absorption spectroscopy(TDLAS),fourier transform infrared spectroscopy(FTIR)and fluorescence assay by gas expansion(FAGE)as the main body has been ***,with the promotion of“reduction of pollution and carbon emissions”strategy,there have been significant changes in the sources of pollution/greenhouse gases,emission components and emission concentrations,which have put forward new and higher requirements for the development of monitoring *** the future,we should pay more attention to the development of new optical monitoring techniques and the construction of stereoscopic monitoring system,the interdisciplinarity(among mathematics,physics,chemistry and biology,etc.),and the monitoring of greenhouse gases and research on atmospheric chemistry.

关键词： Pollution Greenhouse gas Optical atmospheric monitoring Needs and challenges

Dynamic plugging regulating strategy of pipeline robot based on reinforcement learning

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Petroleum Science 2024年第1期21卷 597-608页

作者： xing-Yuan Miao Hong Zhao College of Mechanical and Transportation Engineering China University of PetroleumBeijing102249China

Pipeline isolation plugging robot (PIPR) is an important tool in pipeline maintenance operation. During the plugging process, the violent vibration will occur by the flow field, which can cause serious damage to the pipeline and PIPR. In this paper, we propose a dynamic regulating strategy to reduce the plugging-induced vibration by regulating the spoiler angle and plugging velocity. Firstly, the dynamic plugging simulation and experiment are performed to study the flow field changes during dynamic plugging. And the pressure difference is proposed to evaluate the degree of flow field vibration. Secondly, the mathematical models of pressure difference with plugging states and spoiler angles are established based on the extreme learning machine (ELM) optimized by improved sparrow search algorithm (ISSA). Finally, a modified Q-learning algorithm based on simulated annealing is applied to determine the optimal strategy for the spoiler angle and plugging velocity in real time. The results show that the proposed method can reduce the plugging-induced vibration by 19.9% and 32.7% on average, compared with single-regulating methods. This study can effectively ensure the stability of the plugging process.

关键词： Pipeline isolation plugging robot Plugging-induced vibration Dynamic regulating strategy Extreme learning machine Improved sparrow search algorithm Modified Q-learning algorithm

Research on the influences of motion characteristics of jetting projectile charge under water

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Defence Technology（防务技术） 2024年第3期33卷 411-425页

作者： xing Chen Yong-gang Lu Institute of Systems Engineering China Academy of Engineering PhysicsMianyang 621900SichuanChina

Shaped charge warhead is important for enhancing the damage performance of underwater *** paper used finite element analysis software and based on JPC water penetration experiments to examine the influence of liner parameters(wall thickness,material),charge aspect ratio,and stand-off distance on the movement characteristics of JPC in *** findings reveal that the head diameter of the JPC increases and experiences significant erosion after entering the water,the effective length of the JPC in water undergoes two distinct phases:a growth phase and a decrease phase,with the velocity of the JPC decaying *** the liner thickness,stand-off distance and the charge aspect ratio can improve the erosion resistance and the velocity retention capacity of the *** optimal ranges for liner thickness and stand-off distance are 0.0363D_(k) to 0.0545D_(k)(D_(k) is the charge diameter),the stand-off distance should be within 1.0D_(k).After the charge aspect ratio higher than 1.25,the charge structure exerts minimal influence the movement characteristics of the JPC in *** density plays a crucial role in the velocity decay pattern of the JPC during *** with higher densities exhibit superior velocity retention capabilities in water,with the velocity decay pattern converging if the densities are ***,copper,tantalum and tungsten liners are deemed appropriate for underwater shaped charge ***,the results will provide an important reference for the design of underwater shaped charge warhead.

关键词： JPC Movement characteristics Underwater penetration Numerical simulation

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端午文化在日本的传播与流变

民间文化论坛 2023年第6期 95-102页

作者：邢雪艳北京联合大学旅游学院

节日的时间空间、仪式、内容和隐喻等伴随着社会发展变迁而不断调整变化。端午文化源于我国古代夏至节气和阴阳五行文化基础上形成的禳灾纳福、驱邪避凶等民间习俗,后来又叠加了纪念屈原、龙舟竞技等文化内容和表演仪式,逐渐成为水神信... 详细信息

节日的时间空间、仪式、内容和隐喻等伴随着社会发展变迁而不断调整变化。端午文化源于我国古代夏至节气和阴阳五行文化基础上形成的禳灾纳福、驱邪避凶等民间习俗,后来又叠加了纪念屈原、龙舟竞技等文化内容和表演仪式,逐渐成为水神信仰、龙图腾崇拜、农耕祭礼、祛毒禳灾以及纪念先贤等多功能复合的文化载体。相同节日在不同地域也呈现不同的文化表征,我国的端午文化在向东传入日本后,部分功能因为在当地没有再生的土壤而逐渐走向解体,也有部分功能与当地历史文化进行融合重构而逐渐形成新的文化。端午文化中的水神信仰和农耕祭礼经历千年后依然出现在京都“葵祭”的骑射中,禳灾纳福的文化元素则在日本上千年的传播过程中促成了端午节向男孩节的流变。

关键词：端午文化水神农耕祭礼鲤鱼旗男孩节