检索结果-南通市图书馆

基于威布尔分析的钢车轮弯曲疲劳寿命改善提升

2023中国汽车工程学会年会暨展览会

作者： ye jinquan Jiang Yanqing Gao Baishi Dai Rui Dongfeng motor Co. Ltd.Dongfeng Nissan Technical Center

According to solve three different types of engine mount stopper noise or abnormal vibration problem,including assembly issue,Y direction stopper issue and X direction stopper issue,detailed description the analysis process,countermeasure and verification of noise or abnormal vibration due to stopper or stopper poordesign,then summarize the analytical method and solution of engine mount stopper issue,the analytical method and solution in this paper can also as reference for the other abnormal noise in chassis.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

汽车零部件 2019年第4期 7-11页

作者：叶锦泉李建坤孔红领东风汽车有限公司东风日产乘用车公司技术中心广东广州510800

对钢车轮开发过程中弯曲耐久的试验结果进行威布尔计算分析,针对威布尔计算结果小即可靠性较低的情况进行分析,找到提升钢车轮弯曲耐久寿命影响的因素,并针对该因素进行改善,提高了威布尔F(t)=5%的分析结果,为汽车零部件底盘产品的疲劳... 详细信息

对钢车轮开发过程中弯曲耐久的试验结果进行威布尔计算分析,针对威布尔计算结果小即可靠性较低的情况进行分析,找到提升钢车轮弯曲耐久寿命影响的因素,并针对该因素进行改善,提高了威布尔F(t)=5%的分析结果,为汽车零部件底盘产品的疲劳寿命提升提供了参考。

关键词：钢车轮弯曲疲劳试验威布尔分析

SOLUTE TRANSPORT THROUGH THE VADOSE ZONE:FIELD STUDIES

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 1995年第4期7卷 54-62页

作者： ye, Zitong Yang, Jinzhong Zhang, Renduo Wu, jinquan Wuhan Univ of Hydraulic and Electric Engineering Wuhan China

Solute concentration and water content profiles of an unsaturated soil were measured for a depth 170 cm within an area of 3×6 m2 at different locations. Soil water movement and solute transport in the field were studied and spatial variabilities of soil water content and concentration were discussed. Among the experiments for 33-day under constant leaching, it is shown that the effect of soil variability on soil water distribution is relatively small. However, the concentration distribution exhibits a significant variability in vertical profiles of the field. The coefficient of concentration variation is in the range of 12 to 150%, while less than 40% for water content in the same zone. The mobile and immobile water contents were calculated and related to solute transport. The immobile water content was about 24 to 39% of the total water content in the experimental field.

关键词： Flow of water Groundwater Mechanical permeability Soils Transport properties

四川盆地海相三叠系气田水钾矿及其开发利用展望

在线全文

学校读者我要写书评

暂无评论

四川地质学报 2002年第4期22卷 219-224页

作者：林耀庭何金权叶茂才西南石油局第二地质大队四川自贡643013

四川盆地海相三叠系气田水钾矿分布广泛 ,品质优异。气田水钾矿除富含K+ 组分 ,构成液态钾矿资源外 ,并伴生Br-、I-、B3+ 、Li+ 等多种有用组分 ,为优质化工原料水 ,制取多种无机化工产品 ,经济价值极高。气田水钾矿有沉积变质型及固态... 详细信息

四川盆地海相三叠系气田水钾矿分布广泛 ,品质优异。气田水钾矿除富含K+ 组分 ,构成液态钾矿资源外 ,并伴生Br-、I-、B3+ 、Li+ 等多种有用组分 ,为优质化工原料水 ,制取多种无机化工产品 ,经济价值极高。气田水钾矿有沉积变质型及固态钾矿溶滤叠加型两类 ,是四川找钾工作的新方向。

关键词：四川盆地三叠式开发利用气田水钾矿床找钾方向

Robust decentralized control design for aircraft engines: A fractional type

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2019年第2期32卷 347-360页

作者： Muxuan PAN Liangjin CAO Wenxiang ZHOU jinquan HUANG ye-Hwa CHEN College of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics The George W.Woodruff School of Mechanical Engineering Georgia Institute of Technology

A new decentralized control for aircraft engines is proposed. In the proposed control approach, aircraft engines are considered as uncertain large-scale systems composed of interconnected uncertain subsystems. For each subsystem, the time-varying uncertainty, including parameter disturbances and interconnections in/between subsystems, is depicted by a class of general nonlinear functions. A fractional robust decentralized control with two parts, the nominal one and the fractional one, is presented. The nominal control guarantees the asymptotical stability of the engine system without uncertainty. The fractional part aims at overcoming the influences of uncertainty. Compared to the previous studies, the presented control provides not only an extra flexibility for the system performance tuning by the fraction-type gain but also a facility for the control input calculation. The proposed control approach is applied to a turbofan engine with two subsystems. The computer simulation shows that, in the flight envelope, the fractional control not only guarantees the closed-loop system uniform boundedness and ultimate uniform boundedness but also shows good economy.

关键词： Aircraft engines Large-scale systems Robust decentralized control Uncertainty Uniform boundedness Uniform ultimate boundedness

24例利奈唑胺导致耐多药肺结核患者周围神经炎病例分析

在线全文

学校读者我要写书评

暂无评论

广州医药 2019年第5期50卷 35-40页

作者：张宏邝浩斌覃红娟汪敏袁园叶锦泉冯治宇广州市胸科医院内四科

目的了解利奈唑胺在治疗耐多药肺结核过程中出现的周围神经炎情况,为制定合理的耐多药肺结核方案提供参考。方法选取广州市胸科医院2014年9月30日-2018年1月31日使用含利奈唑胺的抗结核治疗方案的耐多药肺结核患者47例,对治疗过程中利... 详细信息

目的了解利奈唑胺在治疗耐多药肺结核过程中出现的周围神经炎情况,为制定合理的耐多药肺结核方案提供参考。方法选取广州市胸科医院2014年9月30日-2018年1月31日使用含利奈唑胺的抗结核治疗方案的耐多药肺结核患者47例,对治疗过程中利奈唑胺导致的周围神经炎及处理结果进行分析。结果 47例耐多药肺结核患者中出现周围神经炎24例,未出现周围神经炎23例,周围神经炎发生率为51%,两者基本资料对比未发现差异有统计学意义。利奈唑胺的累计用药时间的中位数(极小值-极大值)是150天(30-730),利奈唑胺剂量为1 200 mg/日者7例,600 mg/日者40例,两者周围神经炎的发生比例分别为4/7及20/40,未发现两者的发生比例差异有统计学意义。在发病时间上,利奈唑胺剂量为1 200 mg/日者新增病例数最多的是开始用药的0~2月,而600 mg/日者新增病例数最多的是开始用药的0~5月,其后两者新增发病例数均随时间延长而逐渐降低。发生周围神经炎的患者经停药及营养神经等综合治疗后,其转归为痊愈6例,好转10例,不变8例,无加重、死亡病例。结论利奈唑胺在治疗耐多药肺结核过程中导致周围神经炎的比例较高,但只要及时停药及积极处理,其预后较佳。

关键词：恶唑烷酮类结核抗多种药物性周围神经炎治疗结果利奈唑

抗氧化剂预防抗结核药物致肝损伤的随机开放研究

在线全文

学校读者我要写书评

暂无评论

实用医学杂志 2019年第12期35卷 1867-1870页

作者：覃红娟谭守勇邝浩斌吴迪张宏汪敏叶锦泉袁圆冯治宇陈泽莹李艳广州市胸科医院结核内科

目的探讨N-乙酰半胱氨酸(NAC)预防抗结核药物肝损伤作用。方法肺结核患者196例,2HRZE/4HR+NAC(A组)及2HRZE/4HR+双环醇(B组)为观察组,2HRZE/4HR为对照组(C组),观察8周内肝损伤情况。结果(1)A组肝损伤率17.19%,停药率45.5%,低于C组22.73%... 详细信息

目的探讨N-乙酰半胱氨酸(NAC)预防抗结核药物肝损伤作用。方法肺结核患者196例,2HRZE/4HR+NAC(A组)及2HRZE/4HR+双环醇(B组)为观察组,2HRZE/4HR为对照组(C组),观察8周内肝损伤情况。结果(1)A组肝损伤率17.19%,停药率45.5%,低于C组22.73%,53.3%(P=0.691,P=0.430)。B组肝损伤率19.7%,低于C组22.73%(P=0.670),B组停药率76.9%,高于C组53.3%(P=0.778)。A组患者肝损伤率及停药率低于B组(P=0.712,P=0.245)。(2)发生肝损伤时间,A组多见于4~8周,B组多见2周内,C组3个时间段内相同。(3)各组转氨酶高值时间,A组(27.67±23.047)d较B组(19.75±16.080)d及C组(19.93±14.969)d迟。肝功能恢复时间,A组(16.83±9.998)d及C组(16.14±6.982)d较B组(22.10±19.319)d短,(P=0.469,P=0.478)。结论 NAC预防性护肝作用与双环醇相似,但减少治疗中断率及延迟肝损伤发生时间,肝功能恢复时间短。

关键词：抗氧化剂结核病抗结核药物肝损伤预防

Utilizing resequencing big data to facilitate Brassica vegetable breeding:tracing introgression pedigree and developing highly specific markers for clubroot resistance

在线全文

学校读者我要写书评

暂无评论

Horticultural Plant Journal 2024年第3期10卷 771-783页

作者： Zhiyong Ren jinquan Li Xingyu Zhang Xingxu Li Junhong Zhang Zhibiao ye Yuyang Zhang Qijun Nie Key Laboratory of Vegetable Ecological Cultivation on Highland Ministry of Agriculture and Rural AffairsHubei Key Laboratory of Vegetable Germplasm Enhancement and Genetic ImprovementInstitute of Economic CropsHubei Academy of Agricultural SciencesWuhanHubei 430063China National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops Huazhong Agricultural UniversityWuhanHubei 430070China Vegetable Research Institute Wuhan Academy of Agricultural SciencesWuhanHubei 430345China Hubei Hongshan Laboratory WuhanHubei 430070China Shenzhen Institute of Nutrition and Health Huazhong Agricultural UniversityWuhanHubei 430070China Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhenGuangdong 518000China

Clubroot caused by Plasmodiophora brassicae is a devastating disease of Cruciferous *** cultivars with clubroot resistance(CR)is the most effective control *** the two major Brassica vegetable species *** and ***,several commercial cultivars with unclear CR pedigrees have been intensively used as CR donors in ***,the continuous occurrence of CR-breaking makes the CR pedigree underlying these cultivars one of the breeders'most urgent *** complex intraspecific diversity of these two major Brassica vegetables has also limited the applicability of CR markers in different breeding *** we first traced the pedigree underlying two kinds of CR that have been widely applied in breeding by linkage and introgression analyses based on public resequencing *** ***,a major locus CRzi8 underlying the CR of the commercial CR donor‘DegaoCR117’was ***8 was further shown to have been introgressed from turnip(*** ***)and that it carried a potential functional allele of *** turnip introgression carried CRb^(c),sharing the same coding sequence with the CRb that was also identified from chromosome C07 of *** CR cultivars with different *** natural populations,variation analysis of linkage intervals of CRzi8,PbBa8.1,CRb,and CRb^(c)yielded easily resolved InDel markers(>20 bp)for these fundamental CR *** specificity of these markers was tested in diverse cultivars panels,and each exhibited high reliability in *** research demonstrates the value of the practice of applying resequencing big data to solve urgent concerns in breeding programs.

关键词： Brassica Clubroot resistance Resequencing Introgression analysis Molecular marker

The mechanodonor-acceptor coupling (MDAC) approach for unidirectional multi-state fluorochromism

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2021年第2期64卷 253-262页

作者： Luyan Gu Lujia Zhang Xiao Luo Ying Zheng Zhiwei ye Meng Lv jinquan Chen Chunlai Chen Yi Xiao Weihong Zhu Xuhong Qian Youjun Yang State Key Laboratory of Bioreactor Engineering Shanghai Key Laboratory of Chemical BiologySchool of PharmacyEast China University of Science and TechnologyShanghai 200237China School of Life Sciences Beijing Advanced Innovation Center for Structural BiologyBeijing Frontier Research Center for Biological StructureTsinghua UniversityBeijing 100084China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China School of Chemistry and Molecular Engineering East China Normal UniversityShanghai 200241China School of Chemistry and Molecular Engineering East China University of Science and TechnologyShanghai 200237China State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116024China

Uni-directional multi-state fluorochromic scaffolds are valuable photofunctional molecules and yet scarce. We report a general approach for their design, i.e., mechanodonor-acceptor coupling(MDAC). A photochromic molecule is a mechanodonor, due to its capability to convert photonic energy into mechanical force. Upon proper coupling, it can be used to drive a mechanochromic molecule for uni-directional multi-state fluorochromism. The embodiment of this approach is a rhodamine-dithienylethylene hydride(RDH), which has been successfully employed in super-resolution localization microscopy.

关键词： mechanodonor-acceptor coupling fluorochromism diarylethene-rhodamine hybrid single-molecule imaging