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电气电路型断轨监测设备测试方案研究

铁道技术监督 2024年第2期52卷 35-40页

作者：刘聪聪郑璟瑜李小帅中国铁道科学研究院集团有限公司标准计量研究所北京100081

为保障电气电路型断轨监测设备的性能,对其测试方案开展研究。根据断轨监测设备工作频率范围内的钢轨电气参数,模拟钢轨,搭建仿真环境。通过分析断轨监测设备雷电防护试验和振动与冲击试验端口数量、类型和试验等级选择,以及性能测试中... 详细信息

为保障电气电路型断轨监测设备的性能,对其测试方案开展研究。根据断轨监测设备工作频率范围内的钢轨电气参数,模拟钢轨,搭建仿真环境。通过分析断轨监测设备雷电防护试验和振动与冲击试验端口数量、类型和试验等级选择,以及性能测试中误报率、断轨检出率和断轨报警时间的具体要求,明确测试方案。开展雷电防护试验时,建议通信端口按照TB/T3498—2018《铁路通信信号设备雷击试验方法》6.2条“6级:信号设备通信端口与钢轨连接”的试验等级测试;监测主机采用太阳能电池板供电时,不建议对电源端口进行雷电防护试验;开展振动与冲击试验时,根据TB/T2846—2015《铁路地面信号产品振动试验方法》中的10.1条对监测主机进行振动试验,根据GB/T 2423.5—2019《环境试验第2部分:试验方法试验Ea和导则:冲击》的附录A,对监测主机开展冲击试验;在测试误报率和断轨检出率时,应设置多个模拟断轨测试点,牵引回流类断轨监测设备报警时间应保持在5min以内。

关键词：钢轨断轨监测设备测试方案

连接方式对蜂窝夹芯结构抗爆性能的影响规律研究

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包装工程 2024年第19期45卷 29页

作者：李小帅黄静泊谢晶李建飞许泽建陈鹏万北京理工大学

目的旨在探究近场空爆载荷作用下蜂窝夹芯结构面板与芯层的连接方式对抗爆性能的影响。方法分别设计了由激光选区熔化技术打印制备的316L不锈钢一体式蜂窝夹芯结构和分离式蜂窝夹芯结构2种构型，并进行了50mm爆距的爆炸冲击实验。后... 详细信息

目的旨在探究近场空爆载荷作用下蜂窝夹芯结构面板与芯层的连接方式对抗爆性能的影响。方法分别设计了由激光选区熔化技术打印制备的316L不锈钢一体式蜂窝夹芯结构和分离式蜂窝夹芯结构2种构型，并进行了50mm爆距的爆炸冲击实验。后又结合数值模拟方法对比分析了一体式、分离式、胶接式和焊接式4种连接方式在爆炸载荷作用下的动态响应过程，并分别从各层结构变形失效、背板最大残余挠度及吸能等角度联合揭示了抗爆性能差异及其影响规律。结果一体式蜂窝夹芯结构背板最大残余挠度为17.5 mm，相比分离式、胶接式和焊接式，分别减少了47.3%、43.0%、28.3%。爆炸冲击结束后，一体式蜂窝夹芯结构的总塑性应变能和背板应变能占比分别为866.9 J、13.3%，与焊接式蜂窝夹芯结构的相近，但其总塑性应变能较分离式、胶接式分别低4.1%、16.6%，而背板应变能占比则较二者分别低13.8%、14.3%。结论通过实验与仿真研究，证明了连接强度对蜂窝夹芯结构抗爆性能具有显著的影响，其中一体式结构抗爆性能表现最佳，且连接强度越高，其运动速度越小，响应时间也越短，对其提升防护结构的减震效果具有重要作用。

关键词： 316L不锈钢蜂窝夹芯结构连接方式近场空爆抗爆性能

Narrow-band high-transmittance birefringent filter and its application in wide color gamut display

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Chinese Physics B 2021年第5期30卷 401-405页

作者： Chi Zhang Rui Niu Wenjuan li xiaoshuai li Hongmei Ma Yubao Sun School of Electronic and Information Engineering Hebei University of TechnologyTianjin 300401China Department of Applied Physics Hebei University of TechnologyTianjin 300401China

We propose a narrow-band birefringent filter and its application in wide color *** birefringent filter consists of five phase retarders and two polarizers,and it has both narrow band and high *** the experiment,we fabricate the birefringent filter using quartz phase retarders and polarizers,and apply it in serval different *** color gamuts of displays are enhanced more than 30%NTSC(National Television System Committee),and the widest color gamuts that have been obtained are 126%NTSC in liquid crystal displays and 138%NTSC in organic light-emitting ***,the deep blue light in spectrum of display can be reduced using the birefringent *** birefringent filter can be an efficient element to achieve wide color gamut display.

关键词： narrow band filter wide color gamut display

列车运行监控装置复杂环境适应性检测方案研究

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铁道技术监督 2024年第7期52卷 42-47页

作者：郑璟瑜何宇晖马研刘聪聪李小帅中国铁道科学研究院集团有限公司标准计量研究所北京100081

列车运行监控装置(LKJ)应用数量多、地域广,需适应复杂环境。分析LKJ应用环境和现行标准对LKJ环境适应性的要求,提出LKJ复杂环境适应性检测方案,详细阐述低温低气压试验、温度变化试验、温度(低温/高温)与振动综合试验等的严酷等级和试... 详细信息

列车运行监控装置(LKJ)应用数量多、地域广,需适应复杂环境。分析LKJ应用环境和现行标准对LKJ环境适应性的要求,提出LKJ复杂环境适应性检测方案,详细阐述低温低气压试验、温度变化试验、温度(低温/高温)与振动综合试验等的严酷等级和试验方法,对低温低气压试验、温度变化试验方案的可行性进行验证。验证结果表明,低温低气压试验、温度变化试验方案可行。

关键词：列车运行监控装置环境适应性低温低气压温度检测方案

Biomass-derived porous carbon with single-atomic cobalt toward high-performance aqueous zinc-sulfur batteries at room temperature

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Journal of Energy Chemistry 2024年第8期95卷 325-335,I0008页

作者： Shenfei Zhao xiaoshuai Wu Jiliang Zhang Chunjie li Zixiang Cui Weihua Hu Ruguang Ma Changming li Institute for Clean Energy&Advanced Materials School of Materials&EnergySouthwest UniversityChongqing 400715China Institute for Materials Science and Devices School of Materials Science and EngineeringSuzhou University of Science and TechnologySuzhou 215009JiangsuChina School of Materials Science and Engineering Dalian Jiaotong UniversityDalian 116028LiaoningChina

Aqueous zinc-sulfur batteries at room temperature hold great potential for next-generation energy storage technology due to their low cost,safety and high energy ***,slow reaction kinetics and high activation energy at the sulfur cathode pose great challenges for the practical ***,biomass-derived carbon with single-atomic cobalt sites(MMPC-Co)is synthesized as the cathode in Zn-S *** catalysis of single-atom Co sites greatly promotes the transform of cathode electrolyte interface(CEI)on the cathode surface,while offering accelerated charge transfer rate for high conversion reversibility and large electrochemical surface area(ECSA)for high electrocatalytic ***,the rich pore structure not only physically limits sulfur loss,but also accelerates the transport of zinc *** addition,the large pore volume of MMPC-Co is able to relieve the stress effect caused by the volume expansion of Zn S during charge/discharge cycles,thereby maintaining the stability of electrode ***,the sulfur cathode maintains a high specific capacity of 729.96 m A h g^(-1)after 500 cycles at4 A g^(-1),which is much better than most cathode materials reported in the *** work provides new insights into the design and development of room-temperature aqueous Zn-S batteries.

关键词： Biomass-derived carbon Single-atom catalysts Rich pore structure Sulfur cathode Aqueous zinc-sulfur batteries

基于4D血流MRI的乙状窦周骨壁缺失性搏动性耳鸣的横窦血流特征研究

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中华耳鼻咽喉头颈外科杂志 2024年第9期59卷 897-901页

作者：代驰航丁贺宇吕晗仇晓妤李小帅曾嵘王国鹏杨正汉龚树生王振常赵鹏飞首都医科大学附属北京友谊医院放射科北京100050 首都医科大学附属北京友谊医院耳鼻咽喉头颈外科北京100050

目的基于4D血流MRI检查技术探索乙状窦周骨壁缺失(sigmoid sinus wall dehiscence, SSWD)导致的搏动性耳鸣(pulsatile tinnitus, PT)患者的患侧横窦血流动力学特点。方法回顾性分析2019年1月至2021年1月所有因单侧PT就诊于首都医科大学... 详细信息

目的基于4D血流MRI检查技术探索乙状窦周骨壁缺失(sigmoid sinus wall dehiscence, SSWD)导致的搏动性耳鸣(pulsatile tinnitus, PT)患者的患侧横窦血流动力学特点。方法回顾性分析2019年1月至2021年1月所有因单侧PT就诊于首都医科大学附属北京友谊医院且确诊为SSWD性PT的患者的临床资料。其中行4D血流MRI检查的共26例, 女24例, 男2例, 年龄(35.8±8.1)岁;按照性别年龄匹配1∶1纳入健康对照组26名(46侧), 其中女24名, 男2名, 年龄(31.8±4.4)岁。利用4D血流MRI技术采集2组横窦数据。应用SPSS19.0软件对指标进行非参数秩和检验、t检验、方差分析。同时, 将存在统计学意义的数据进行二元Logistic分析。结果 PT组患侧优势引流者19例(73.1%), 多于对照组的11名(42.3%), 横窦丘形狭窄及锥形狭窄发生率多于对照组(69.2% 比21.7%;42.3% 比17.4%)。PT组近心端经平面平均血流速度Vtp-avg及经平面最大血流速度Vtp-max大于对照组[(33.75±13.88)cm/s 比(15.84±7.21)cm/s;(93.19±33.55)cm/s 比(40.40±14.40)cm/s]。PT组中间部及近心端的最大血流率Flowmax大于对照组[4.69(2.87;5.62)ml/s比2.76(1.67;4.99)ml/s;3.41(2.16;5.47)ml/s比2.67(1.68;4.41)ml/s]。对照组横窦速度变化相对较平缓, 而PT组近心端速度明显增大。SSWD性PT与近心端最大血流速度[OR=1.086(1.029~1.146), P=0.003]独立相关。结论横窦回流优势侧与近心端血流速度增大可能是引起SSDW性PT的重要血流动力学原因。

关键词：磁共振成像乙状窦横窦骨质缺损狭窄耳鸣搏动性

Vaspin alleviates pathological cardiac hypertrophy by regulating autophagy-dependent myocardial senescence

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Emergency and Critical Care Medicine 2024年第1期4卷 4-15页

作者： Haiying Rui Huaxiang Yu Dan Zou Kai Chi Ping Xu xiaoshuai Song Lulu liu Xuting Wu Jinxin Wang li Xue Department of Emergency Medicine and Chest Pain Center Qilu Hospital of Shandong UniversityJinanShandongChina Shandong Provincial Clinical Research Center for Emergency and Critical Care Medicine Institute of Emergency and Critical Care Medicine of Shandong UniversityQilu Hospital of Shandong UniversityJinanShandongChina Key Laboratory of Emergency and Critical Care Medicine of Shandong Province Key Laboratory of Cardiopulmonary-Cerebral Resuscitation Research of Shandong ProvinceShandong Provincial Engineering Laboratory for Emergency and Critical Care MedicineQilu Hospital of Shandong UniversityJinanShandongChina The Key Laboratory of Cardiovascular Remodeling and Function Research Chinese Ministry of EducationChinese Ministry of Health and Chinese Academy of Medical SciencesThe State and Shandong Province Joint Key Laboratory of Translational Cardiovascular MedicineQilu Hospital of Shandong UniversityJinanShandongChina.

Background:Visceral adipose tissue-derived serine protease inhibitor(vaspin),a secretory adipokine,protects against insulin *** studies have demonstrated that serum vaspin levels are decreased in patients with coronary artery disease and that vaspin protects against myocardial ischemia-reperfusion injury and ***,it remains unclear whether vaspin exerts specific effects on pathological cardiac ***:An in vivo study was conducted using a cardiac hypertrophy model established by subcutaneous injection of isoproterenol(ISO)in C57BL/6 and vaspin-ko *** was administered intraperitoneally to mice,for further study.H9c2 cells and neonatal rat ventricular myocytes(NRVMs)were treated with ISO to induce *** vaspin fusion protein,the proteasome inhibitor MG132,and chloroquine diphosphate were used for further mechanistic ***:Here,we provide the first evidence that vaspin knockdown results in markedly exaggerated cardiac hypertrophy,fibrosis,and cardiomyocyte senescence in mice treated with ***,the administration of exogenous recombinant human vaspin protected NRVMs in vitro against ISO-induced hypertrophy and ***,vaspin significantly potentiated the ISO-induced decrease in *** rapamycin and chloroquine diphosphate regulated autophagy in vivo and in vitro,respectively,and participated in vaspin-mediated ***,the PI3K-AKT-mTOR pathway plays a critical role in vaspin-mediated autophagy in cardiac tissues and *** data showed that vaspin downregulated the p85 and p110 subunits of PI3K by linking p85 and p110 to NEDD4L-mediated ubiquitination ***:Our results show,for the first time,that vaspin functions as a critical regulator that alleviates pathological cardiac hypertrophy by regulating autophagy-dependent myocardial senescence,providing potential preventive and therapeutic targets for pathological cardiac hyper

关键词： Autophagic flux Myocardial senescence Pathological cardiac hypertrophy Ubiquitination Vaspin

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水间隔装药孔壁爆炸应力分布规律

兵工学报 2021年第12期42卷 2646-2654页

作者：刘江超高文学张声辉李小帅北京工业大学城市建设学部北京100124

在隧道掘进过程中采用水封爆破时,水介质长度对爆破效果具有重要影响。为得到水间隔装药孔壁爆炸应力分布规律,采用Starfield迭加法将应力波的衰减和迭加考虑在内,推导孔壁受到的应力变化情况,并利用有限元分析软件ANSYS/LS-DYNA对计算... 详细信息

在隧道掘进过程中采用水封爆破时,水介质长度对爆破效果具有重要影响。为得到水间隔装药孔壁爆炸应力分布规律,采用Starfield迭加法将应力波的衰减和迭加考虑在内,推导孔壁受到的应力变化情况,并利用有限元分析软件ANSYS/LS-DYNA对计算结果进行模拟验证。结果表明:在炸药和水介质交界处孔壁受到的应力最大,随着到交界处距离的增加,爆炸应力以指数函数的形式衰减;采用等效间隔起爆方式对不同药量的爆炸过程进行模拟,水间隔段孔壁爆炸应力模拟值和理论值衰减规律一致,二者在相同位置的应力误差保持在10%左右,同时水间隔段孔壁指定点受到的总应力随着药量的增加而增大;采用Starfield迭加法获取水间隔段孔壁爆炸应力的计算公式是合理的,能够为水封爆破的应用提供参考。

关键词：水间隔装药孔壁爆炸应力 Starfield迭加法数值模拟

Two sex pheromone receptors for sexual communication in the American cockroach

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Science China(life Sciences) 2024年第7期67卷 1455-1467页

作者： Na li Renke Dong Huanchao Zeng Yan Zhang Run Huang Wei liu Fengming Cao Jincong Yu Mingtao liao Jingyou Chen Wenlei Zhang Zejian Huang Jiahui Wang li li Shen Zhu Danyan Huang Zining li xiaoshuai Zhang Dongwei Yuan Nan Chen Yongliang Fan Guirong Wang Coby Schal Yufeng Pan Sheng li Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology Institute of Insect Science and TechnologySchool of Life SciencesSouth China Normal UniversityGuangzhou 510631China Guangmeiyuan R&D Center Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied TechnologySouth China Normal UniversityMeizhou 514589China lingnan Guangdong Laboratory of Modern Agriculture Genome Analysis Laboratory of the Ministry of AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518000China State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of AgricultureNorthwest A&F UniversityYangling 712100China Department of Entomology and Plant Pathology North Carolina State UniversityRaleigh 27695USA The Key Laboratory of Developmental Genes and Human Disease School of Life Science and TechnologySoutheast UniversityNanjing 210096China

Volatile sex pheromones are vital for sexual communication between males and *** of the American cockroach,Periplaneta americana,produce and emit two sex pheromone components,periplanone-A(PA)and periplanone-B(PB).Although PB is the major sex attractant and can attract males,how it interacts with PA in regulating sexual behaviors is still *** this study,we found that in male cockroaches,PA counteracted PB *** identified two odorant receptors(ORs),OR53 and OR100,as PB/PA and PA receptors,***53 and OR100 were predominantly expressed in the antennae of sexually mature males,and their expression levels were regulated by the sex differentiation pathway and nutrition-responsive *** localization of OR53 and OR100 in male antennae further revealed that two types of sensilla coordinate a complex two-pheromone-two-receptor pathway in regulating cockroach sexual *** findings indicate distinct functions of the two sex pheromone components,identify their receptors and possible regulatory mechanisms underlying the male-specific and age-dependent sexual behaviors,and can guide novel strategies for pest management.

关键词： sex pheromone odorant receptor sexual attraction sex differentiation cockroach