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综合护理在稀有血型库建立中的应用研究

甘肃医药 2024年第8期43卷 750-752页

作者：张若楠杨勇毅庆阳市中心血站甘肃庆阳745000 甘肃省红十字血液中心甘肃兰州730046

目的:探讨稀有血型库建立中,综合护理技能应用的意义。方法:抽取甘肃某地区2020年4月至2023年10月共初筛登记的229例稀有血型捐献者,根据护理模式不同分为两组,为常规组(79例)在献血过程中实施常规护理干预,综合组(150例)实施综合护理... 详细信息

目的:探讨稀有血型库建立中,综合护理技能应用的意义。方法:抽取甘肃某地区2020年4月至2023年10月共初筛登记的229例稀有血型捐献者,根据护理模式不同分为两组,为常规组(79例)在献血过程中实施常规护理干预,综合组(150例)实施综合护理干预。记录并分析两种模式的干预效果。结果:综合组献血者献血后的不良反应发生率低于常规组(P<0.05);综合组各项护理质量评分均高于常规组(P<0.05);综合组献血者的护理满意度高于常规组(P<0.05)。结论:综合护理在稀有血型库建立中的应用效果显著,值得推广应用。

关键词：稀有血型捐献者稀有血型库综合护理

基于人工神经网络的激光冲击复合强化残余压应力预测与分布调控

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表面技术 2024年第13期53卷 75-83页

作者：周远航冯爱新韦朋余张若楠宋培龙盛永琦姚红兵河海大学力学与工程科学学院南京210024 温州大学瑞安研究生院浙江瑞安325200 中国船舶科学研究中心江苏无锡214000

目的通过结合人工神经网络和激光冲击有限元仿真,以减少激光冲击强化最佳参数设计的迭代次数,提高参数优化效率。方法构建基于冲击波压力幅值的激光冲击强化Abaqus有限元模型。采用Vdload子程序与对应二次开发脚本形成光斑重叠区域残余... 详细信息

目的通过结合人工神经网络和激光冲击有限元仿真,以减少激光冲击强化最佳参数设计的迭代次数,提高参数优化效率。方法构建基于冲击波压力幅值的激光冲击强化Abaqus有限元模型。采用Vdload子程序与对应二次开发脚本形成光斑重叠区域残余应力的初始数据集。建立人工神经网络(ANN)算法模型,采用测试集对ANN模型进行测试,对超参数进行优化,对比分析不同机器学习算法的R2得分、MAE和RMSE。设计并优化镍铝青铜模型表面的残余应力大小与分布,对比分析经机器学习预测后的模型表面残余应力分布情况。结果经ANN预测整个面LSCP处理的模型表面形成了高达‒413 MPa的残余压应力,并且预测了均匀与非均匀的残余压应力分布;RMSE均方根误差仅为1.1891,既显示出较好的预测精度,又避免了模型的过拟合,保证了一定的泛化能力,模型综合性能远优于其他经典的ML算法回归模型。所预测的残余压应力分布模型均达到了较深的影响层深,且在1 Hz的脉冲重复频率下,最大效率达到了1.87 mm^(2)/s。结论激光冲击强化与机器学习的结合实现了易产生残余应力孔洞的镍铝青铜光斑重叠区域的最大残余压应力分布,且该方法优化出了整个表面的均匀与相对非均匀的残余压应力分布,为非均匀塑性应变引起镍铝青铜材料异质结构的形成开辟了新的设计途径。

关键词：激光冲击复合强化人工神经网络复合强化残余应力

Thermal insulating and fire-retardant Si_(3)N_(4) nanowire membranes resistant to high temperatures up to 1300℃

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Journal of Materials Science & Technology 2023年第24期155卷 82-88页

作者： Yeye Liu Leilei zhang ruonan zhang Siqi Shao Lina Sun Xinyi Wan Tiantian Wang State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Fiber Reinforced Light Composite MaterialsNorthwestern Polytechnical UniversityXi’an 710072China

Superior thermal insulating and fire-retardant ceramic membranes are urgently demanded in the aerospace,construction,and chemical engineering ***,the generic characteristics of ceramic membranes,such as brittleness,structural collapse,and crystallization-induced pulverization behavior,present a great plague to their practical ***,we report a highly flexible,mechanically stable,fire-retardant,and high-temperature-resistant ceramic membrane based on the interlocked Si_(3)N_(4) nanowires formed by the precursor pyrolysis *** Si_(3)N_(4) nanowire membrane(SNM)has excellent high-temperature resistance under alcohol lamps and butane spray *** thermal insulation with a thermal conductivity as low as 0.056 W m^(-1)K^(-1)can be attributed to the high porosity of SNM,which makes it a desirable candidate for heat insulators under harsh *** importantly,SNM exhibits thermal stability and robust mechanical properties in the range of 25 to 1300℃.The high-temperature resistance of SNM up to 1300℃is achieved by the four stages:Si3 N4 nanowires,Si_(3)N_(4)@SiO_(2) nanowires,SiO_(2) nanowires,and bead-like SiO_(2) *** heat-treated at 1300℃,the macroscopic size of SNM does not change significantly,and the interlocked structure is still ***,SNM still maintains excellent mechanical properties,with tensile strength as high as 0.26 *** work provides a facile method for fabricating excellent thermal insulating and fire-retardant ceramic membranes,showing prospective application prospects in the era of thermal insulating materials.

关键词： Silicon nitride nanowires Thermal insulation Fire-resistance High-temperature resistance

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香菇菌丝热胁迫响应及耐热综合评价

中国农业科技导报 2024年第5期26卷 90-100页

作者：刘萌林辰壹吴瑞曹爽梁志豪张若楠新疆农业大学园艺学院乌鲁木齐830052

为研究不同香菇菌株菌丝对热胁迫的响应,综合评价其耐热性,筛选出关键指标,以9个香菇菌株为试验材料,在菌丝生长期分别进行25℃常温培养(CK)和37℃热胁迫处理,测定不同处理下菌丝的生长速度、干重、硫代巴比妥酸反应物(thiobarbituric a... 详细信息

为研究不同香菇菌株菌丝对热胁迫的响应,综合评价其耐热性,筛选出关键指标,以9个香菇菌株为试验材料,在菌丝生长期分别进行25℃常温培养(CK)和37℃热胁迫处理,测定不同处理下菌丝的生长速度、干重、硫代巴比妥酸反应物(thiobarbituric acid reactive substances,TBARS)、蛋白质羰基(protein carbonyl,PCO)、超氧化物歧化酶(superoxide dismutase,SOD)、过氧化氢酶(catalase,CAT)、过氧化物酶(peroxidase,POD)、漆酶、羧甲基纤维素酶、半纤维素酶及淀粉酶的生理活性,并通过相关性分析、主成分分析、隶属函数及聚类分析进行耐热性综合评价。结果表明,热胁迫后菌丝的生长速度、干重较CK极显著下降,而TBARS、PCO含量和SOD、CAT、漆酶、羧甲基纤维素酶、半纤维素及淀粉酶活性较CK极显著上升,POD活性较CK显著上升。其中,新秋7的生长速度和漆酶、半纤维素、淀粉酶活性的降幅及TBARS含量的增幅最大,分别为66.55%、82.42%、46.03%、75.27%、23.64%;109的干重降幅最大,为77.81%;808的PCO含量增幅最大,为43.77%;212的SOD、POD活性增幅最大,分别为CK的1.64、4.48倍;久香秋7的CAT增幅最大,为49.90%;1513的羧甲基纤维素酶活性降幅最大,为60.87%。相关性分析表明,SOD与POD活性呈极显著正相关;POD活性与TBARS含量呈极显著负相关。以耐热性综合评价D值进行排序分类,将9个菌株划分为3个类群,Ⅰ类包含212、久香秋7、238和0912;Ⅱ类包含9608、808、1513和109;Ⅲ类仅包含新秋7;3个类群的耐热性表现为Ⅰ>Ⅱ>Ⅲ。经逐步回归分析建立了最佳回归模型,筛选出菌丝生长速度、TBARS含量及SOD和POD活性为耐热性关键鉴定指标,可快速鉴定菌丝的耐热能力。以上研究结果为南疆地区选育耐热香菇核心种质提供理论依据。

关键词：香菇热胁迫生长速度硫代巴比妥酸反应物抗氧化酶

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Outage-driven link selection for secure buffer-aided networks

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Science China(Information Sciences) 2022年第8期65卷 197-212页

作者： Dawei WANG Tianmi HE Fuhui ZHOU Julian CHENG ruonan zhang Qihui WU School of Electronics and Information Northwestern Polytechnical University College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics National Mobile Communications Research Laboratory Southeast University School of Engineering The University of British Columbia Research & Development Institute of Northwestern Polytechnical University in Shenzhen Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space Nanjing University of Aeronautics and Astronautics

In this paper, we investigate secure communication in a two-hop wireless network, where multiple buffer-aided relays assist to securely forward data from the sender to the destination threatened by a passive eavesdropper. To satisfy the security and delay requirements, we propose a novel link selection policy without the instantaneous wiretap channel state information. Different from the most current link selection policies,the proposed link selection policy is designed by joint considering the link secrecy outage probability and the buffer states. To evaluate the secrecy performance, we first characterize the system state transition matrix and the stationary state probability, and then derive the closed-form expressions for the secrecy outage probability and the secrecy rate. Moreover, we formulate a framework based on the queuing theory to analyze the end-to-end information delay at the source, the relays, and the queues, and derive the closed-form expression for the information delay. Finally, we conduct simulations to validate our theoretical performance analysis, and verify the performance improvement of the proposed outage-driven secure transmission scheme in terms of secrecy outage probability and information delay.

关键词： buffer-aided relay information delay link selection secrecy outage probability

Akkermansia muciniphila对大鼠高温运动后器官损伤的影响

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中国微生态学杂志 2024年第2期36卷 125-134,146页

作者：杨展孙学伟秦明珂崔茜张昕蕊张若男路寒张明燕朱进郑峰唐成亮东部战区疾病预防控制中心江苏南京210002 滨州医学院基础医学院陆军军医大学军事预防医学系军队劳动卫生学教研室东部战区空军医院南京中医药大学医学院整合医学学院南京医科大学病原生物学系南京医科大学第二附属医院南京中医药大学金陵临床医学院

目的探讨嗜黏蛋白阿克曼菌(Akkermansia muciniphila,***)通过干预肠道微生态,对大鼠高温运动后的器官损伤的影响。方法采用6~8周龄的Sprague Dawley大鼠,随机分成对照组(n=5)、常温运动组(RT组,n=8)、高温运动组(HT组,n=8)、***干预组(... 详细信息

目的探讨嗜黏蛋白阿克曼菌(Akkermansia muciniphila,***)通过干预肠道微生态,对大鼠高温运动后的器官损伤的影响。方法采用6~8周龄的Sprague Dawley大鼠,随机分成对照组(n=5)、常温运动组(RT组,n=8)、高温运动组(HT组,n=8)、***干预组(AKK干预组,n=8)、高温粪菌移植组(HT.R组,n=4)和***粪菌移植组(AKK.R组,n=4),在力竭运动后采集大鼠的血液、组织及粪便样本,检测谷丙转氨酶(ALT)、谷草转氨酶(AST)、尿素氮(BUN)和肌酐(Cr)的变化。通过16S rRNA基因测序和GC-MS方法分析粪便中菌群和代谢产物的改变,对结肠组织和肝脏组织进行病理检测,采用免疫组化方法评估肠道屏障功能。结果HT组和AKK干预组大鼠在(35±2)℃、湿度(55±5)%的环境下平均运动时间分别为(13.76±3.454)和(19.55±1.997)min,差异有统计学意义(t=4.104,P=0.0011)。***干预后,大鼠血清的AST(U/mL)、ALT(U/mL)、BUN(mmol/L)和Cr(μmol/L)平均水平(3.953±1.877、2.622±1.086、10.040±1.088、65.800±12.010)均低于HT组(6.358±1.436、4.335±1.304、15.010±1.913、93.980±39.110),其中AST、ALT、BUN水平检测差异均有统计学意义(t=2.878、2.856、6.381,P=0.0122、0.0127、<0.0001)。肠道菌群组成结构在属水平上发生变化,粪便中代谢产物水平有不同程度的改变。病理结果显示,AKK干预组大鼠的肝脏损伤较HT组有显著缓解。AKK干预组大鼠的肠道屏障相关连接蛋白ZO-1和Occludin表达量的累积光密度值(6330±481.8、6140±281.7)较HT组(3425±257.0、3943±242.1)上调(t=9.216、10.250,P=0.0008、0.0005)。结论***能够在一定程度上通过维持肠道屏障功能,改善肠道微生态,减轻高温运动带来的肠道及肝脏损伤。

关键词：运动高温嗜黏蛋白阿克曼菌肠道菌群器官损伤

分众化视域下伟大建党精神的思想政治教育价值实践路径研究

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赤峰学院学报（哲学社会科学版） 2024年第4期45卷 56-60页

作者：张若男姜万兰李蓝冰贵州医科大学马克思主义学院贵州贵阳550000 赤峰学院马克思主义学院内蒙古赤峰024000

从思想政治教育的角度来看,中国共产党的先驱们在革命斗争中形成了伟大建党精神,极大地丰富了新时代思想政治教育方式,延伸并拓展了新时代思想政治教育载体,赋予了新时代思想政治教育崭新的内容,具有重大的时代价值。运用分众化理念探... 详细信息

从思想政治教育的角度来看,中国共产党的先驱们在革命斗争中形成了伟大建党精神,极大地丰富了新时代思想政治教育方式,延伸并拓展了新时代思想政治教育载体,赋予了新时代思想政治教育崭新的内容,具有重大的时代价值。运用分众化理念探索弘扬伟大建党精神的实践路径,是顺应时代发展、推动伟大建党精神教育走深走实的必然和应然之举。

关键词：伟大建党精神分众化思想政治教育价值实现路径

Simultaneously enhancing mechanical and tribological properties of carbon fiber composites by grafting SiC hexagonal nanopyramids for brake disk application

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Journal of Materials Science & Technology 2022年第26期121卷 1-8页

作者： Yao Guo Leilei zhang Qiang Song ruonan zhang Fei Zhao Wei Li Hongchao Sheng Xianghui Hou Hejun Li State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Fiber Reinforced Light Composite MaterialsNorthwestern Polytechnical UniversityXi’an 710072China Department of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Faculty of Engineering The University of NottinghamUniversity ParkNottingham NG72RDUnited Kingdom

Extensive attention has been drawn to the development of carbon fiber composites for their application in brake disks due to the increasing demand for brake disks with high mechanical strength and better tribological ***,we design SiC hexagonal nanopyramids modified carbon/carbon(SiCNPsC/C)composites,in which SiCNPs are radially grafted on the carbon fibers by the combined sol-gel and carbothermal reduction method,and pyrolytic carbon(Py C)matrix is deposited on nucleation sites including carbon fibers and SiCNPs by isothermal chemical vapor infiltration(ICVI).Benefiting from the special structure,SiCNPs-C/C composites exhibit superior mechanical and frictional *** with C/C composites,SiCNPs-C/C composites have 147%,90.3%,70.6%,and 117.9%improvement in the hardness,interlaminar shear strength,and out-of-plane and in-plane compressive strength,respectively,which is attributed to the optimized fiber/matrix(F/M)interfaces bonding and the enhanced cohesion strength of Py C *** addition,the friction coefficient of SiCNPs-C/C composites increases by 25.5%,and the wear rate decreases by 38.0%.This work provides an optional design thought for the nanomaterials and enlightens the mechanical and frictional modification of composites in the field of the brakes.

关键词： SiC hexagonal nanopyramids Carbon/carbon composites Microstructure Mechanical properties Tribological properties

Ultrafast and real-time physical random bit extraction with all-optical quantization

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Advanced Photonics 2022年第3期4卷 83-89页

作者： Ya Guo Qiang Cai Pu Li ruonan zhang Bingjie Xu K.Alan Shore Yuncai Wang Taiyuan University of Technology Key Laboratory of Advanced Transducers and Intelligent Control SystemsMinistry of EducationTaiyuanChina Guangdong University of Technology School of Information EngineeringGuangdong Provincial Key Laboratory of Photonics Information TechnologyGuangzhouChina Northwestern Polytechnical University School of Electronics and InformationXi’anChina Institute of Southwestern Communication Science and Technology on Communication LaboratoryChengduChina Bangor University School of Electronic EngineeringWalesUnited Kingdom

Optical chaos generated by perturbing semiconductor lasers has been viewed,over recent decades,as an excellent entropy source for fast physical random bit generation(RBG)owing to its high bandwidth and large random ***,most optical-chaos-based random bit generators perform their quantization process in the electrical domain using electrical analog-to-digital converters,so their real-time rates in a single channel are severely limited at the level of Gb/s due to the electronic ***,we propose and experimentally demonstrate an all-optical method for RBG where chaotic pulses are quantized into a physical random bit stream in the all-optical domain by means of a length of highly nonlinear *** our proof-of-concept experiment,a 10-Gb/s random bit stream is successfully generated on-line using our *** that the single-channel real-time rate is limited only by the chaos *** that the Kerr nonlinearity of silica fiber with an ultrafast response of few femtoseconds is exploited for composing the key part of quantizing laser chaos,this scheme thus may operate potentially at much higher real-time rates than 100 Gb/s provided that a chaotic entropy source of sufficient bandwidth is available.

关键词： chaos random number generation semiconductor lasers optical signal processing.