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接触点管理在儿科护理管理中的应用与效果分析

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医院管理论坛 2024年第3期41卷 59-62页

作者：占裕香浙江省常山县人民医院

目的探讨接触点管理在儿科护理管理中的应用与效果。方法选取2021年9月—2022年1月浙江省常山县人民医院儿科收治的住院患儿87例为对照组,实施常规优质护理服务;选取2022年2月—2022年6月收治的住院患儿87例为观察组,在对照组基础上... 详细信息

目的探讨接触点管理在儿科护理管理中的应用与效果。方法选取2021年9月—2022年1月浙江省常山县人民医院儿科收治的住院患儿87例为对照组,实施常规优质护理服务;选取2022年2月—2022年6月收治的住院患儿87例为观察组,在对照组基础上实施接触点管理。对比实施接触点管理前后儿科护士的护理质量评分及两组患儿家长的护理满意度。结果实施接触点管理后儿科护士的护理质量评分显著高于实施前;观察组患儿家长护理满意度为97.70%,显著高于对照组的81.61%(p<0.05)。结论在儿科护理管理中提取接触点,制定相关服务标准并实施,组织护士培训,加强接触点的监督考核,使护理工作更加人性化、程序化和科学化,有效提高护理质量,同时也有效提升了患儿和家长的护理满意度和医院美誉度。

关键词：接触点管理儿科护理管理

Trigger control characteristics of fuze-recoil simulation system based on electromagnetic launcher

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Journal of Systems Engineering and Electronics 2017年第3期28卷 563-571页

作者： Wenhao wang Shihua Bi Hongjun xiang Chao zhan Xichao Yuan School of Aerospace Beijing Institute of TechnologyBeijing 100081China Shijiazhuang Mechanical Engineering College Shijiazhuang 050003China Representative Bureau of the General Equipment Xi’an 710032China

Fuze is the information processing and control unit of the ammunition, so the quality of the fuze becomes one of the most important aspects of ammunition detection. Since using recoil force is a common method to the arm fuze, its dynamic simulation test has always been the focus of the fuze test research. A new fuze recoil environmental simulation method is proposed based on the electromagnetic launcher. Then the trigger control characteristics of the fuze recoil simulation system and the influence of the trigger position on the recoil force are studied. The results of the study show that although the pulse width of the armature force curve can be changed by adjusting the trigger position, due to the limit of the range, there also exists the contradiction that the electromagnetic pulse width gets narrow with the increase of electromagnetic force peak. Thus, it cannot meet the requirements of the fuze launch recoil simulation. In order to make the recoil force close to the actual environment, the multi-stage trigger control characteristics are analyzed, and the influence of trigger position on recoil environmental force characteristics is studied. Then a fuze launch recoil environmental simulation platform is established and continuous electromagnetic force is achieved by using the trigger strategy. Finally, the experiment is performed to simulate the fuze launch recoil environment and show the feasibility and effectiveness of the proposed theoretical analysis. The major research work of this paper includes studying the composition and basic principle of the simulation system, establishing a launch model to analyze the single-stage and multi-stage coil fuze launch recoil characteristics, designing the test device to verify the correctness and validity of the research. This paper draws the conclusions that the feasibility of the fuze launch environmental simulation based on the electromagnetic launcher is verified, the trigger position has a great influence on force p

关键词： trigger control fuze-recoil simulation electromagnetic launcher

Distributed antenna wireless communication system coverage design and field trial over higher frequency band

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仪器仪表学报 2016年第S1期37卷 131-138页

作者： Xu zhan Liu Jienan Zhou Shidong Chen xiang wang Wenqi Beijing Information Science & Technology University University of Georgia Tsinghua University Sun Yat-sen University

This paper aims to examine the architecture design of a distributed antenna based Gbps wireless communication system using the high frequency *** order to analyze the feasibility of the higher frequency band applications,the cumulative distribution of simulated user throughput in a cellular is investigated *** shows that capacity improvement can be obtained using higher operating frequency band,especially in hotspot ***,the architecture of the distributed antenna system(DAS) is introduced to overcome the disadvantages of weak coverage and rank deficient for the traditional multiple-input multiple-output(MIMO) systems using higher frequency bands in line-of-sight(LOS)*** addition,a software-defined-radio(SDR) based Gbps wireless transmission system with scalable hardware architecture is designed and ***,a demo of outdoor DAS coverage for high data throughput application is *** trials show that 1 Gbps data rate and a large coverage in outdoor environments can be achieved over 6.05 *** is proved that the Gbps DAS system at a higher frequency band can be a successful model for future wireless broadband coverage in hotspot scenarios.

关键词： higher frequency band capacity testbed distributed antenna system(DAS)

基于随机森林的发电机定子线棒局部放电图谱特征识别方法

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高电压技术 2024年第3期50卷 1272-1280页

作者：胡建林张翕宋展向紫馨邓鸿飞蒋兴良重庆大学雪峰山能源装备安全国家野外科学观测研究站重庆400044

发电机定子线棒局部放电的在线监测和故障诊断对于电机故障预警、故障定位和指导机组检修有重要意义。目前存在部分不同类型局部放电相似度高,模式识别方法计算时间过长的问题,需要高精度和高效的识别方法,为此提出一种基于随机森林的... 详细信息

发电机定子线棒局部放电的在线监测和故障诊断对于电机故障预警、故障定位和指导机组检修有重要意义。目前存在部分不同类型局部放电相似度高,模式识别方法计算时间过长的问题,需要高精度和高效的识别方法,为此提出一种基于随机森林的定子线棒局部放电识别方法。制备了6种类型定子线棒,用特高频天线检测局部放电信号,基于相位分布局部放电(PRPD)图谱比对,提出参数幅值不对称度。基于随机森林方法识别缺陷类型,计算特征重要性,选择有效特征。最后,可视化特征相似度,与传统反向传播(BP)神经网络方法对比,验证有效性。结果表明:随机森林算法可以有效识别人工缺陷定子线棒局部放电,总体识别正确率达到93.33%。筛选半数特征后,随机森林比BP神经网络的准确率提高了10.83%,特征选择对随机森林的准确率影响很小,但识别效率大幅提高。随机森林在少量特征时识别准确率、计算时间都明显优于神经网络。幅值不对称度参数的重要性排在全部特征前1/3,具有推广价值。

关键词：定子线棒局部放电在线监测随机森林 PRPD图谱

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中国锂资源综合风险动态演变及预警研究

自然资源学报 2024年第3期39卷 528-546页

作者：成金华左芝鲤詹成郭海湘中国地质大学(武汉)经济管理学院武汉430074 成都理工大学管理科学学院成都610059

随着锂资源在电动汽车、储能等领域的广泛应用,锂资源的供需关系和市场格局愈加复杂,相关风险也逐步显现,这使得锂资源综合风险预警和科学管理变得迫切且必要。根据资源安全的五种基本含义对应地构建了涵盖“资源—技术—贸易—市场—... 详细信息

随着锂资源在电动汽车、储能等领域的广泛应用,锂资源的供需关系和市场格局愈加复杂,相关风险也逐步显现,这使得锂资源综合风险预警和科学管理变得迫切且必要。根据资源安全的五种基本含义对应地构建了涵盖“资源—技术—贸易—市场—社会”的中国锂资源综合风险评估框架。采用CRITIC权重结合灰色关联投影法对其进行了评估与预警,并采用通径分析厘清其影响路径。研究结果表明:(1)中国锂资源综合风险常年处于中风险及以上水平,以2015年为分水岭呈现双波峰变化状态,其中技术风险、贸易风险和社会风险呈现明显的多峰形态,两极分化现象较为突出;(2)中国锂资源综合风险未来将维持在“中警”状态;(3)风险之间存在显著的正向影响。

关键词：锂资源风险演变预警风险影响路径中国

两个RIL群体中小麦籽粒品质相关性状QTL定位及KASP标记开发

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作物学报 2024年第7期50卷 1669-1683页

作者：毕俊鸽曾占奎李琼洪壮壮颜群翔赵越王春平河南科技大学农学院/河南省旱地作物种质资源利用工程研究中心河南洛阳471000 神农种业实验室河南郑州450000

本研究利用小麦55K SNP(55K single-nucleotide polymorphism)芯片和DArT(diversity array technology)标记对Avocet/Chilero和Avocet/Huites构建的两个F6重组自交系群体(recombinant inbred line,RIL)进行了小麦籽粒蛋白质含量(grain protein content,GPC)、湿面筋含量(wet gluten content,WGC)和沉降值(sedimentation value,SV)的QTL(quantitative trait loci)定位。共鉴定到68个与小麦籽粒蛋白质含量、湿面筋含量和沉降值相关的QTL,表型贡献率为3.60%~22.53%,其中,位于3A(2)、4D、5D(2)、6A(8)和7B染色体上的14个QTL可在多环境下被重复检测到。此外,在3A、3D、4B、5D、6A(2)和7B染色体上检测到7个QTL簇,位于3AS染色体9.32~60.01 Mb和6AS染色体38.47~82.95 Mb的稳定QTL簇C3A和C6A.2,同时与小麦籽粒蛋白质含量、湿面筋含量和沉降值显著相关,分别解释了6.55%~14.21%和3.83%~22.53%的表型变异。同时,在2个QTL簇中筛选到16个可能与籽粒蛋白质含量相关的候选基因,并根据候选基因开发了可供育种利用的KASP标记CGPC-6A-KASP-1和CGPC-6A-KASP-2。本研究为小麦籽粒品质相关性状的遗传改良提供了新的QTL位点和KASP标记,为分子标记辅助育种提供依据与参考。

关键词：小麦籽粒蛋白质含量 QTL定位 KASP标记

Visible light promoted difunctionalization reactions of alkynes

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Chinese Journal of Catalysis 2019年第7期40卷 1003-1019页

作者： xiang Ren zhan Lu Department of Chemistry Zhejiang UniversityHangzhou 310058ZhejiangChina

Visible light promoted difunctionalization of alkynes is reviewed. The difunctionalization reaction is achieved by different reagents. Radicals such as carbon(sp3), carbon(sp2), and other heteroatom(P, S, N, Se, O, and halide) radicals initiated by visible light can undergo radical addition to a carbon-carbon triple bond. Upon further transformation, the desired difunctionalized products are obtained. Some organometallic complexes can be activated by visible light;the difunctionalization of alkynes is catalyzed by these species. Other reagents like 1,3-dipole precursors could also react with alkynes to give difunctionalization products;here, the 1,3-dipole derivatives are obtained by visible light photocatalysis. So far, the strategy has been succeeded in the formation of C–C bonds and C–X bonds. Several valuable chemical skeletons have been constructed under mild conditions. However, high regio-and stereoselectivities in some direct difunctionalization methodologies are yet to be achieved.

关键词： Visible light photocatalysis Difunctionalization Cyclization Alkyne Redox catalyst

Resin composition: An indicator of oil maturity as revealed by fourier transform ion cyclotron resonance mass spectrometry

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Petroleum Science 2023年第2期20卷 769-775页

作者： Tian Liang Zhao-Wen zhan Guo-xiang wang Yan-Rong Zou State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryGuangzhouGuangdong510640China CAS Center for Excellence in Deep Earth Science GuangzhouGuangdong510640China University of Chinese Academy of Sciences Beijing100049China

A pyrolysis experiment was carried out on a Dongying Depression kerogen sample to separate the resin from the oil. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) with a positive-ion detector was used to detect the relative proportional changes in the compounds of the resin. During the whole pyrolysis experiment, the relative ratio of resin exceed 10% of the soluble component at each temperature point. Five compounds were detected from the resin: N1, N1O1, N1O_(2), O1, and O_(2). To research the changes in the proportions of the compounds during pyrolysis clearly, these five compounds were divided into three classes: N1, N1Ox, and Ox. The N1 class has the largest proportion in resin at the beginning of the pyrolysis, while Ox class has the least proportion. And the relationship between the number and the molecular mass of three classes compound was researched. With increasing maturity, the proportion of N1 and the N1Ox class decreased rapidly, while the Ox class increased slowly. Through researching these resin compounds, it was found that an inversion in the proportions of above three compounds appeared at the end of the oil window. At the same time, we found that the DBE and carbon number of resin compounds have changed obviously during the pyrolysis: the DBE increased, while the carbon number decreased significantly. And the details of the change of each compound have been researched. This research extends our knowledge of judging the maturity of crude oil during the pyrolysis through the characteristics of compounds in resin and provides the new index based on resin for the evaluation of thermal evolution stage and hydrocarbon generation capacity of source rocks.

关键词： Resin Pyrolysis FT-ICR MS Heteroatom compound Maturity DBE

清除Kupffer细胞减轻APAP诱导的药物性肝损伤

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中国生物工程杂志 2024年第6期44卷 68-77页

作者：刘慧茹王婷李亚婷向慎思詹轶群任广明杨晓明安徽医科大学基础医学院合肥230032 北京工业大学环境与生命学部北京1100124 中国人民解放军军事科学院军事医学研究院辐射医学研究所北京100850

目的:利用Cre/iDTR系统特异性剔除Kupffer细胞,探究Kupffer细胞在对乙酰氨基酚(APAP)诱导的药物性肝损伤中的作用。方法:腹腔注射1μg白喉毒素(DT),流式细胞术检测注射后肝脏Kupffer细胞的清除效率。接着将Clec4fCre/iDTR小鼠分为4组,... 详细信息

目的:利用Cre/iDTR系统特异性剔除Kupffer细胞,探究Kupffer细胞在对乙酰氨基酚(APAP)诱导的药物性肝损伤中的作用。方法:腹腔注射1μg白喉毒素(DT),流式细胞术检测注射后肝脏Kupffer细胞的清除效率。接着将Clec4fCre/iDTR小鼠分为4组,分别是对照组、注射DT组、注射APAP组及注射DT和APAP组,饥饿18 h后腹腔注射300 mg/kg APAP,建立急性药物性肝损伤模型。酶联免疫吸附试验(ELISA)和细胞因子微球检测(CBA)技术检测血清中丙氨酸氨基转移酶(ALT)、天冬氨酸氨基转移酶(AST)的释放和炎症因子的分泌;苏木精-伊红(HE)染色和原位末端转移酶标记法(TUNEL)染色检测肝组织的坏死和肝细胞的凋亡;免疫组织化学检测肝脏炎性细胞的浸润;免疫印迹法检测肝组织中信号通路的活化;定量聚合酶链反应(qPCR)检测肝脏中炎症因子的mRNA表达水平。结果:清除Kupffer细胞,降低APAP模型血清中ALT、AST转氨酶的释放,减轻肝组织坏死和肝细胞凋亡。与对照组相比,清除Kupffer细胞抑制血清中TNF-α、IL-6等炎症因子的分泌,减少肝脏F4/80^(+)、Ly6G^(+)细胞的浸润,降低TNF-α、IL-6等炎性因子的mRNA水平以及JNK炎症通路的活化。结论:清除Kupffer细胞可显著缓解APAP诱导的药物性肝损伤,明确了Kupffer细胞在APAP致肝损伤中的重要作用。

关键词：对乙酰氨基酚药物性肝损伤 Kupffer细胞 Cre/iDTR系统炎症