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某DHT电子驱动桥维护与故障分析

汽车实用技术 2024年第15期49卷 14-17页

作者：刘刊牛阿慧闫炳强骆颖哲河北工业职业技术大学汽车工程系河北石家庄050091 河北途电科技有限公司河北石家庄050081 石家庄职业技术学院机电工程系河北石家庄050081

为提高新能源混合动力汽车的维护与维修效率,对新能源混合动力汽车电子驱动桥进行了研究。文章剖析了某新能源汽车混动专用变速箱(DHT)电子驱动桥的结构,探讨了其常规维护保养,分析了DHT电子驱动桥常见故障现象与其解决方法,基于研究成... 详细信息

为提高新能源混合动力汽车的维护与维修效率,对新能源混合动力汽车电子驱动桥进行了研究。文章剖析了某新能源汽车混动专用变速箱(DHT)电子驱动桥的结构,探讨了其常规维护保养,分析了DHT电子驱动桥常见故障现象与其解决方法,基于研究成果整理了常见的DHT电子驱动桥故障维修注意事项。研究对新能源混合动力汽车电子驱动桥的维护保养、故障诊断分析以及技术研究具有一定的参考意义。

关键词：新能源汽车混动专用变速箱电子驱动桥维护保养故障诊断

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Interface bond degradation and damage characteristics of full-length grouted rock bolt in tunnels with high temperature

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第10期15卷 2639-2657页

作者： Yunpeng Hu Mingming Zheng Wenkai Feng Jianjun Tong Yicheng Wang Qiling Wang kan liu Longzhen Ye State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu610059China Key Laboratory of Geohazard Prevention of Hilly Mountains Ministry of Land and Resources(Fujian Key Laboratory of Geohazard Prevention)Fuzhou350116China School of Civil Engineering Southwest Jiaotong UniversityChengdu610031China College of Civil Engineering Tongji UniversityShanghai200092China

Full-length grouted bolts play a crucial role in geotechnical engineering thanks to their excellent ***,few studies have been concerned with the degrading performance of grouted rock bolts caused by extensive and continuous heat conduction from surrounding rocks in high-geothermal tunnels buried more than 100 m(temperature from 28C to 100C).To investigate the damage mechanism,we examined the time-varying behaviors of grouted rock bolts in both constant and variable temperature curing environments and their damage due to the coupling effects of high temperature and humidity through mechanical and micro-feature tests,including uniaxial compression test,pull-out test,computed tomography(CT)scans,X-ray diffraction(XRD)test,thermogravimetric analysis(TGA),etc.,and further analyzed the relationship between grout properties and anchorage *** order to facilitate a rapid assessment and control of the anchorage performance of anchors in different conditions,results of the interface bond degradation tests were correlated to environment parameters based on the damage model of interfacial bond stress ***,a thermal hazard classification criterion for anchorage design in high-geothermal tunnels was *** on the reported results,although high temperature accelerated the early-stage hydration reaction of grouting materials,it affected the distribution and quantity of hydration products by inhibiting hydration degree,thus causing mechanical damage to the anchorage *** was a significant positive correlation between the strength of the grouting material and the anchoring *** by the changes in grout properties,three failure patterns of rock bolts typically *** a hot-wet curing regime results in less reduction in anchorage force compared to the hot-dry curing *** findings of this study would contribute to the design and investigations of grouted rock bolts in high-geothermal tunnels.

关键词： High-geothermal tunnels Anchoring structure Coupling effect of temperature and humidity Bond degradation Interfacial damage mechanism

基于气味厚薄理论探析黄连减轻神经炎症的中医机制

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湖南中医药大学学报 2024年第3期44卷 499-503页

作者：李宇翔王彪刘侃陈亚胡国恒湖南中医药大学第一中医临床学院湖南长沙410007 湖南中医药大学第一附属医院湖南长沙410007

神经炎症几乎发生在所有中枢神经系统疾病的进展过程中,随着临床实践及科学研究的深入,发现黄连及以黄连为主要组成的中药复方对减轻神经炎症、改善疾病预后均有较好效果。基于对“气味厚薄”理论内容的梳理,阐明黄连具有“大苦大寒,味... 详细信息

神经炎症几乎发生在所有中枢神经系统疾病的进展过程中,随着临床实践及科学研究的深入,发现黄连及以黄连为主要组成的中药复方对减轻神经炎症、改善疾病预后均有较好效果。基于对“气味厚薄”理论内容的梳理,阐明黄连具有“大苦大寒,味厚气薄”的作用特点,并论述黄连功效与神经炎症中医病机之间的关联,以及黄连通过清心、厚肠、坚肾阴3个方面起到减轻神经炎症的作用机制。

关键词：神经炎症黄连气味厚薄中枢神经系统疾病心脑同治肠脑同治肾脑同治

乌司他丁联合左卡尼汀对脓毒血症中心肌损伤的疗效观察及对细胞因子的影响

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中国当代医药 2024年第3期31卷 71-74页

作者：钟林岐刘侃马清龄汤俊宏邓桂业广东省广州市中西医结合医院急诊科广东广州510800

目的探讨乌司他丁联合左卡尼汀对脓毒血症中心肌损伤的疗效观察及对细胞因子的影响。方法选取2021年5月至2022年12月广州市中西医结合医院收治的104例脓毒血症中心肌损伤患者作为研究对象,采用抽签的方式分为对照组(n=52)和研究组(n=52... 详细信息

目的探讨乌司他丁联合左卡尼汀对脓毒血症中心肌损伤的疗效观察及对细胞因子的影响。方法选取2021年5月至2022年12月广州市中西医结合医院收治的104例脓毒血症中心肌损伤患者作为研究对象,采用抽签的方式分为对照组(n=52)和研究组(n=52)。对照组患者在常规治疗的基础上联合左卡尼汀进行治疗,研究组患者在对照组的基础上联合乌司他丁进行治疗,比较两组患者的临床治疗效果、细胞因子水平以及不良反应。结果研究组患者治疗后的临床治疗总有效率高于对照组,差异有统计学意义(P<0.05)。研究组患者治疗后C反应蛋白(CRP)、乳酸(Lac)、肌酸激酶同工酶(CK-MB)、高敏肌钙蛋白(TNT-HSST)、脑利尿钠肽前体(Pro-BNP)、白细胞介素-6(IL-6)、白细胞介素-10(IL-10)、肿瘤坏死因子-α(TNF-α)水平低于对照组,CD4^(+)水平、CD4^(+)/CD8^(+)高于对照组,差异有统计学意义(P<0.05)。研究组患者不良反应总发生率低于对照组,差异有统计学意义(P<0.05)。结论临床中对脓毒血症中心肌损伤患者给予常规治疗联合乌司他丁与左卡尼汀,可提高临床效果,在控制细胞因子水平方面效果较为突出,治疗期间无明显不良反应,安全性较高,值得推广应用。

关键词：乌司他丁左卡尼汀脓毒血症心肌损伤细胞因子水平

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基于能耗预测的空气悬架高度控制技术

制造业自动化 2024年第7期46卷 25-34页

作者：李任平刘侃王里达雷羿含王森波湖南大学机械与运载工程学院湖南长沙410082 株洲时代新材料科技股份有限公司湖南株洲412007

针对空气悬架系统高度调节过程中由于系统惯性易出现超调震荡,导致控制阀高频开关,进而引发能源浪费的问题,基于压缩气体有效能理论和能量守恒定律,提出了一种基于能耗预测与PI结合的悬架高度控制方法,以实现对空气悬架高度的快速精确... 详细信息

针对空气悬架系统高度调节过程中由于系统惯性易出现超调震荡,导致控制阀高频开关,进而引发能源浪费的问题,基于压缩气体有效能理论和能量守恒定律,提出了一种基于能耗预测与PI结合的悬架高度控制方法,以实现对空气悬架高度的快速精确控制。首先,基于空气弹簧数学模型和测试数据,结合AMEsim软件建立了四分之一空气悬架系统仿真模型,并通过试验验证了模型的准确性。其次,提出了空气悬架高度控制理想能耗计算方法,然后,设计了基于理想能耗的高度控制器,提出了一种新的先以储气罐气压后以空气悬架高度为控制目标的二阶段控制策略,最后通过四分之一空气悬架系统半实物仿真平台实验验证了该控制策略的有效性和优越性。

关键词：空气悬架能量消耗高度控制节能

制造业数字交易产业标准化发展的探索——以山东省为例

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中国标准化 2024年第15期 90-94页

作者：谢元庆高斐谢淑娟李云鹏刘勘伪浪潮云信息技术股份公司中国铁路济南局集团有限公司济南西机务段山东省标准化研究院

作为工业及制造业大省、数字经济大省,山东省委、省政府把工业经济作为头号工程来抓,深入开展数实融合赋能,构建以数据为关键要素的数字经济。充分进行制造业数字化转型及数字资源的挖掘,以数据要素流通应用为核心的制造业数字交易技术... 详细信息

作为工业及制造业大省、数字经济大省,山东省委、省政府把工业经济作为头号工程来抓,深入开展数实融合赋能,构建以数据为关键要素的数字经济。充分进行制造业数字化转型及数字资源的挖掘,以数据要素流通应用为核心的制造业数字交易技术及其标准化研究,就成了充分释放工业大数据价值潜力的关键。本文立足制造业数字产业标准化的建立和应用,研究制造业数字交易产业发展路径,总结山东省制造业和数字经济融合的成功经验,探索如何以标准化的方式将成果固化、推广和应用。为我国数字交易产业的发展提出标准层面的促进思路和建议。

关键词：融合赋能数字经济数字交易

Excessive gestational weight gain in early pregnancy and insufficient gestational weight gain in middle pregnancy increased risk of gestational diabetes mellitus

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Chinese Medical Journal 2022年第9期135卷 1057-1063页

作者： Aiqi Yin Fuying Tian Xiaoxia Wu Yixuan Chen kan liu Jianing Tong Xiaonian Guan Huafan Zhang Linlin Wu Jianmin Niu Department of Obsetics Shenchen Matemity and Chid Helthare HoptalThe First School of Cinial MedicneSouthem Medcal UnierityShenzhenGuangdong 518028China

Background:Gestational weight gain(GWG)is associated with the risk of gestational diabetes mellitus(GDM).However,the effect of weight gain in different trimesters on the risk of GDM is *** study aimed to evaluate the effect of GWG on GDM during different ***:A birth cohort study was conducted from 2017 to 2020 in Shenzhen,*** total,51,205 participants were included comprising two models(early pregnancy model and middle pregnancy model).Gestational weight(kg)was measured at each prenatal clinical visit using a standardized weight *** regression analysis was used to assess the risk of *** analysis and mediation effect analysis were performed in the middle pregnancy ***:In the early pregnancy model,the risk of GDM was 0.858 times lower(95%confidence interval[CI]:0.786,0.937)with insufficient GWG(iGWG)and 1.201 times higher(95%CI:1.097,1.316)with excessive GWG after *** the middle pregnancy model,the risk of GDM associated with iGWG increased 1.595 times(95%CI:1.418,1.794)after adjustment;for excessive GWG,no significant difference was found(P=0.223).Interaction analysis showed no interaction between GWG in early pregnancy(GWG-E)and GWG in middle pregnancy(GWG-M)(F=1.268;P=0.280).The mediation effect analysis indicated that GWG-M plays a partial mediating role,with an effect proportion of 14.9%.Conclusions:eGWG-E and iGWG-M are associated with an increased risk of *** control of weight gain in early pregnancy is needed,and sufficient nutrition should be provided in middle pregnancy.

关键词： Gestational diabetes mellitus Gestational weight gain Early pregnancy Middle pregnancy

High-performance,low-power,and flexible ultraviolet photodetector based on crossed ZnO microwires p-n homojunction

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Photonics Research 2024年第4期12卷 648-662页

作者： SHULIN SHA KAI TANG MAOSHENG liu PENG WAN CHENYANG ZHU DANING SHI CAIXIA kan MINGMING JIANG College of Physics MIIT Key Laboratory of Aerospace Information Materials and PhysicsKey Laboratory for Intelligent Nano Materials and DevicesNanjing University of Aeronautics and AstronauticsNanjing 211106China

Low-power, flexible, and integrated photodetectors have attracted increasing attention due to their potential applications of photosensing, astronomy, communications, wearable electronics, etc. Herein, the samples of ZnO microwires having p-type(Sb-doped ZnO, ZnO:Sb) and n-type(Ga-doped ZnO, ZnO:Ga) conduction properties were synthesized individually. Sequentially, a p-n homojunction vertical structure photodiode involving a single ZnO:Sb microwire crossed with a ZnO:Ga microwire, which can detect ultraviolet light signals, was constructed.

关键词： power ultraviolet conduction

Higher ambient temperatures may worsen obstructive sleep apnea:A nationwide smartwatch-based analysis of 6.2 million person-days

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Science Bulletin 2024年第13期69卷 2114-2121页

作者： Anni Li Qingli Zhang Yuan Yao Xinlei Zhu Cong liu Yutao Guo Haidong kan Renjie Chen School of Public Health Key Lab of Public Health Safety of the Ministry of Education and NHC Key Lab of Health Technology AssessmentFudan UniversityShanghai 200032China Ministry of Education-Shanghai Key Laboratory of Children’s Environmental Health Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200092China Department of Pulmonary Vessel and Thrombotic Disease Sixth Medical CenterChinese PLA General HospitalBeijing 100048China Institute for Hospital Management Research Chinese PLA General HospitalBeijing 100048China Children’s Hospital of Fudan University National Children’s Medical CenterShanghai 201102China School of Public Health Hengyang Medical SchoolUniversity of South ChinaHengyang 421001China

Obstructive sleep apnea(OSA)is a serious type of sleep disorder that can lead to cardiometabolic and neurocognitive *** utilized smart device-based photoplethysmography technology to collect sleep data from the Chinese population from 2019 to *** lag nonlinear models combined with a generalized nonlinear model or a linear mixed effects model were used to investigate the shortterm associations between daily temperature and indicators of OSA *** included a total of 6,232,056 d of sleep monitoring data from 51,842 participants with moderate to severe risk of OSA from 313 Chinese *** relationships between ambient temperature and OSA exacerbation,apneahypopnea index(AHI),and minimum oxygen saturation(MinSpO_(2))were almost linear and present only on the same *** temperatures were associated with a greater risk of OSA exacerbation,with an 8.4%(95%confidence interval(CI):7.6%–9.3%)increase per 10℃increase in temperature.A 10℃increase in daily temperature corresponded to an AHI increase of 0.70 events/h(95%CI:0.65–0.76)and a MinSpO_(2)decrease of 0.18%(95%CI:0.16%–0.19%).Exposure to elevated temperatures during the night can also lead to adverse *** effects of higher temperatures on OSA severity were stronger among men,participants with a body mass index24 kg/m2,those aged 45 years and older,individuals with a history of hypertension and diabetes,and during the cold *** large-scale,nationwide,longitudinal study provides robust evidence suggesting that higher ambient temperatures may immediately worsen OSA.

关键词： Obstructive sleep apnea Temperature Apnea-hypopnea index Oxygen saturation Smart device