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喷油参数对大缸径车用柴油机怠速噪声影响研究

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内燃机 2024年第4期40卷 24-31页

作者：张宏涛王明阳侯帅王新强张龙祥内燃机与动力系统全国重点实验室山东潍坊261061 潍柴动力股份有限公司山东潍坊261061 潍柴重机股份有限公司技术中心山东潍坊261061

前期试验研究表明,爆压和预喷模式在低负荷工况时对整机噪声的影响较为明显。为更好提升大缸径柴油机噪声舒适性,本文以某V型12缸大缸径柴油机为研究对象,通过调整发动机主喷提前角、预喷油量、预喷间隔角、轨压等喷油参数,进行怠速噪... 详细信息

前期试验研究表明,爆压和预喷模式在低负荷工况时对整机噪声的影响较为明显。为更好提升大缸径柴油机噪声舒适性,本文以某V型12缸大缸径柴油机为研究对象,通过调整发动机主喷提前角、预喷油量、预喷间隔角、轨压等喷油参数,进行怠速噪声对比试验。试验研究结果表明:主喷提前角及轨压越小噪声声压级越小、声品质越好;预喷油量及预喷间隔角存在某一临界值,在此临界值状况下噪声声压级及声品质综合评价最好;主喷提前角、预喷油量、预喷间隔角和轨压等发动机喷油参数对大缸径柴油机怠速噪声影响集中于500Hz~6300Hz频率段。本文研究成果可为改善大缸径柴油机怠速噪声品质的发动机性能数据标定工作提供经验参考。

关键词：大缸径柴油机主喷提前角预喷油量预喷间隔角轨压声品质

基于数字孪生的承压设备安全监测与预警技术研究

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中国特种设备安全 2024年第9期40卷 43-48页

作者：牛帅孙常亮柳斌汪朝杰张洪涛青岛市特种设备检验研究院青岛266000

数字孪生作为一种新型可视化现实模拟技术,不仅能够对氨制冷承压设备通过仿真等手段实现在线监测,还能从繁杂的管道和设备中筛出历次检验周期中存在异常的设备及相应处理结果,制定有效的检验方案。笔者单位首次将数字孪生技术运用到检... 详细信息

数字孪生作为一种新型可视化现实模拟技术,不仅能够对氨制冷承压设备通过仿真等手段实现在线监测,还能从繁杂的管道和设备中筛出历次检验周期中存在异常的设备及相应处理结果,制定有效的检验方案。笔者单位首次将数字孪生技术运用到检验工作中,搭配自主研发的脉冲涡流检测设备,与红外成像和声学检测设备结合使用,监测设备的参数及使用情况,提升了检验效率,对特种设备安全使用与监测有一定的实践意义。

关键词：数字孪生技术氨制冷系统脉冲涡流检测技术监测与预警

A double-layer covered architecture with spinel phase induced by LiPP for Co-free Li-rich cathode with high-rate performance and long lifespan

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Nano Research 2023年第5期16卷 6805-6814页

作者： Ruiqi Zhao Manman Wu Peixin Jiao Xueting Wang Jie Zhu Yang Zhao hongtao zhang Kai zhang Chenxi Li Yanfeng Ma Yongsheng Chen The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China Renewable Energy Conversion and Storage Center(RECAST) Nankai UniversityTianjin 300071China Department Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China Engineering Research Center of High-efficiency Energy Storage(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

Co-free Li-rich Mn-based layered oxides are promising candidates for next-generation lithium-ion batteries(LIBs)due to their high specific capacity,high voltage,low ***,their commercialization is hindered by limited cycle life and poor rate ***,an in-situ simple and low-cost strategy with a nanoscale double-layer architecture of lithium polyphosphate(LiPP)and spinel phase covered on top of the bulk layered phase,is developed for Li_(1.2)Mn_(0.6)Ni_(0.2)O_(2)(LMNO)using Li^(+)-conductor LiPP(denoted as LMNO@S-LiPP).With such a double-layer covered architecture,the half-cell of LMNO@S-LiPP delivers an extremely high capacity of 202.5 mAh·g^(−1)at 1 A·g^(−1)and retains 85.3%of the initial capacity after 300 cycles,so far,the best highrate electrochemical performance of all the previously reported *** energy density of the full-cell assembled with commercial graphite reaches 620.9 Wh·kg^(−1)(based on total weight of active materials in cathode and anode).Mechanism studies indicate that the superior electrochemical performance of LMNO@S-LiPP is originated from such a nanoscale double-layer covered architecture,which accelerates Li-ion diffusion,restrains oxygen release,inhibits interfacial side reactions,suppresses structural degradation during ***,this strategy is applicable for other high-energy-density cathodes,such as LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2),Li_(1.2)Ni_(0.13)Co_(0.13)Mn_(0.54)O_(2),LiCoO_(2).Hence,this work presents a simple,cost-effective,scalable strategy for the development of high-performance cathode materials.

关键词： Co-free Li-rich layered oxides double-layer covered architecture lithium polyphosphate high-rate performance long cycle life

自然美育课程实践的路径探索——以“北戴河地质认识实习”课程为例

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中国地质教育 2024年第1期33卷 111-115页

作者：周全徐能雄张翃滔赵国春中国地质大学(北京)工程技术学院北京100083 中国地质大学(北京)党委学生工作部艺术教育中心北京100083 中国地质大学(北京)地球科学与资源学院北京100083

自然美育是美育工作体系的重要内容,积极拥抱自然美育思想,对引发美育教学方式的创新、全面加强高校美育教学工作有着重要意义。“北戴河地质认识实习”是中国地质大学(北京)为了配合本科生修完“地球科学概论”课程之后而设立的野外实... 详细信息

自然美育是美育工作体系的重要内容,积极拥抱自然美育思想,对引发美育教学方式的创新、全面加强高校美育教学工作有着重要意义。“北戴河地质认识实习”是中国地质大学(北京)为了配合本科生修完“地球科学概论”课程之后而设立的野外实践性课程,是创新型地学人才培养的必修环节。笔者通过深入研究人与自然和谐共生下的自然美育发展路径,结合我校野外地质实习特色,将自然审美教育与野外实习学习相融合,共同掀起打造人与自然和谐共生格局的新局面,为实现这一伟大愿景注入崭新动力。

关键词：自然美育人才培养学科融合课程实践地质实习

Pr(NO(3))_(3)掺杂对TC4微弧氧化涂层微观形貌与耐腐蚀性的影响

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轻金属 2024年第6期 30-34页

作者：张红涛王铁成张云龙张海峰韩玉坤安阳工学院飞行学院河南安阳455000

钛合金因其良好的高比强度、机械性能等特点,已成为临床领域应用最为广泛的植入体材料。但钛合金属于生物惰性材料,与骨组织结合能力较弱,需经适当的改性处理赋予其表面活化性能,提高其与骨的结合强度,缩短愈合周期。因此,在钛合金表面... 详细信息

钛合金因其良好的高比强度、机械性能等特点,已成为临床领域应用最为广泛的植入体材料。但钛合金属于生物惰性材料,与骨组织结合能力较弱,需经适当的改性处理赋予其表面活化性能,提高其与骨的结合强度,缩短愈合周期。因此,在钛合金表面制造出具有生物活性的涂层,成为钛合金临床应用的关键技术问题。针对TC4合金的生物惰性和耐腐蚀性差等问题,本文尝试利用微弧氧化技术在TC4合金表面合成出掺杂羟基磷灰石(HAp)的TiO_(2)复合涂层,在钙磷盐电解液体系中引入Pr(NO(3))_(3),重点研究Pr(NO(3))_(3)掺杂量对TC4微弧氧化涂层的物相组成、表面形貌、表面粗糙度、接触角、电化学极化曲线等参数的影响。研究结果表明:通过微弧氧化技术能够在TC4合金表面直接合成出含有羟基磷灰石(HAp)的TiO_(2)复合涂层。随着电解液中Pr(NO(3))_(3)掺杂量增加,涂层中金红石相TiO_(2)和羟基磷灰石相含量增加。掺Pr涂层的表面粗糙度和接触角呈现出先降低后增加的趋势。与未掺杂Pr(NO(3))_(3)试样相比,掺Pr涂层的腐蚀电流密度有所降低。当Pr(NO(3))_(3)掺杂量达到0.009mol/L时,涂层腐蚀电流密度数值最低,约为182.54nA/cm2,耐蚀性最佳。

关键词：微弧氧化 TC4合金羟基磷灰石 TiO2涂层

Review of Research on Early Cambrian Phosphatized Quadrapyrgites

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Acta Geologica Sinica(English Edition) 2015年第4期89卷 1398-1405页

作者： SHAO Tiequan WANG Qi LIU Yunhuan zhang Yanan LI Hewei HU Bo LI Chuang DONG Zhiguo zhang hongtao School of Earth Science and Resources Chang'an University Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits MLR State Key Laboratory of Paleobiology and Stratigraphy

The metazoan Quadrapyrgites consists, from proximal to distal ends, of an oral area, a cone, a collar, and an apex from the Early Cambrian Fortunian Stage in Xixiang zhangjiagou section, southern Shaanxi Province, South China. Three morphological types of the apex, the most characteristic feature of the taxon, are identified from hundreds of Quadrapyrgites specimens. The Quadrapyrgites growth zone is situated at the oral end, where 12 terminal lobes are generated, uplifted, enlarged, and evaginated to form a crest; A one-by-one of crest number from 2 to 13 has been recognized. The unique growth pattern and ontogenetic sequence refute a cubozoan or cycloneuralian affinity for Olivooides and Quadrapyrgites, and instead defend a coronate scyphozoan hypothesis. An embryonic development and ontogenetic sequence with embryo and crest is constructed.

关键词： SSFs Quadrapyrgites Meishucunian Ontogenetic Sequence Shaanxi province

Geological Setting of the Porphyry Copper Deposit Series of China

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Acta Geologica Sinica(English Edition) 1992年第1期66卷 59-73页

作者： zhang hongtao Rui Zongyao Institute of Mineral Deposits, Chinese Academy of Geological Sciences, Beijing Liu Linqun Institute of Mineral Deposits Chinese Academy of Geological Sciences Beijing

In accordance with the terms global minerogenic series, regional metallogenic series and ore depositsystem which are put forward here, metallogenic environments at different levels are discussed for theporphyry copper deposit series in China. It is considered that the porphyry copper deposits in China arecontrolled not only by the boundaries of convergent plates but, more importantly, by the boundaries ofintraplate divergent mobile belts and those between continental blocks. Besides, the emplacement ofhypabyssal and supper-hypabyssal calc-alkaline magmas and the temporal-spatial distribution of China'sporphyry copper deposits are governed by the superimposition of fracture systems of the pre-Alpine base-ments. Meso-Cenozoic cover and continental-margin new-born crust. Such a superimposition has also re-sulted in the polycyclicity of the mineralization.

关键词： zhang Geological Setting of the Porphyry Copper Deposit Series of China

晚期肺腺癌患者接受一线程序性死亡受体1抗体联合化疗疗效的性别差异

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中国临床医学 2024年第5期31卷 757-764页

作者：申辉张洪涛王浩伟蒋涛赵凤德阜阳市第二人民医院呼吸与危重症医学科阜阳236015 阜阳市第二人民医院肿瘤内科阜阳236015 同济大学附属上海市肺科医院肿瘤科上海200433

目的探讨晚期肺腺癌患者接受一线程序性死亡受体1(programmed death-1,PD-1)抗体联合化疗疗效的性别差异,并初步分析性别影响疗效的潜在生物学机制。方法回顾性分析2018年10月至2023年10月在同济大学附属上海市肺科医院就诊的163例无驱... 详细信息

目的探讨晚期肺腺癌患者接受一线程序性死亡受体1(programmed death-1,PD-1)抗体联合化疗疗效的性别差异,并初步分析性别影响疗效的潜在生物学机制。方法回顾性分析2018年10月至2023年10月在同济大学附属上海市肺科医院就诊的163例无驱动基因变异晚期肺腺癌患者的临床病理特征和生存随访资料,其中103例患者接受一线PD-1抗体联合化疗(男性51例,女性52例),60例患者接受一线标准含铂双药化疗(男性39例,女性21例)。根据性别分组,比较不同性别患者的临床特征、疗效、无进展生存期(progression-free survival,PFS)和总生存期(overall survival,OS)。采用Kaplan-Meier法绘制男性组和女性组患者的生存曲线,log-rank检验进行显著性评价;采用Cox比例风险模型分析PFS和OS的影响因素;采用多色免疫荧光染色法分析不同性别患者基线肿瘤样本程序性死亡受体配体1(programmed death-ligand 1,PD-L1)、CD8、CD68、CD4、FOXP3蛋白表达水平的差异。结果接受一线PD-1抗体联合化疗的患者中,女性组和男性组的中位PFS分别为13.0个月和6.8个月(HR=0.39,95%CI 0.25~0.62;P<0.01);中位OS分别为46.2个月和17.3个月(HR=0.30,95%CI 0.18~0.50;P<0.01)。接受一线化疗的患者中,女性组和男性组的中位PFS分别为5.7个月和5.5个月,中位OS分别为21.7个月和17.7个月,差异均无统计学意义。Cox比例风险模型结果显示,性别是患者接受一线PD-1抗体联合化疗后PFS和OS的独立影响因素(P<0.05)。多色免疫荧光染色分析结果显示,女性肺腺癌患者基线肿瘤样本CD8表达水平显著高于男性患者(P<0.05),而PD-L1、CD68、CD4、FOXP3表达水平差异无统计学意义。结论相较于男性患者,女性肺腺癌患者从一线PD-1抗体联合化疗中获益更多;女性患者基线肿瘤样本CD8表达水平显著高于男性患者,可能是获益更多的潜在机制。

关键词：肺腺癌程序性死亡受体1抗体化疗性别

Starch/polyvinyl alcohol blended materials used as solid carbon source for tertiary denitrification of secondary efuent

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Journal of Environmental Sciences 2013年第10期25卷 1972-1979页

作者： Peng Li Jiane Zuo Wei Xing Lei Tang Xiangyang Ye Zaixing Li Lin Yuan Kaijun Wang hongtao zhang State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University School of Environmental Science and Engineering Hebei University of Science and Technology THUNIP Holdings Co. Ltd.

Starch/polyvinyl alcohol （PVA） blended materials for using as a solid carbon source （SCS） were prepared by blending PVA and gelatinized starch in an aqueous solution system, in which PVA served as framework material and starch as carbon source. The optimization of starch content and temperature effects were investigated. It was indicated that higher denitrification efficiency could be achieved with more starch in the materials. The average specific denitrification rates were 0.93, 0.66, 0.37 and 0.36 mg/（g·day） corresponding to starch content of 70%, 60%, 40% and 30% respectively at 37℃. The denitrification rates increased when operating temperature was raised from 23℃ to 30℃ and then 37℃. The mechanism of carbon release was analyzed incorporating the experimental results of abiotic release in deionized water. The organic carbon was mainly hydrolyzed by microbes, and the biological release efficiencies were at the range of 89.2% to 96.0%. A long-term experiment with a continuous flow reactor with SCS material containing 70% starch was conducted to gain some experience for practical application. When the influent nitrate concentration was in the range of 35.2 to 39.1 mg/L, hydraulic retention time of 4 hr, and operating temperature of 30℃, a nitrogen removal efficiency up to 94.6% and denitrification rate of 0.217 kg/（***） was achieved. The starch-based materials developed in this study can be used as a solid carbon source for tertiary nitrogen removal from secondary effluent.

关键词： solid carbon source tertiary denitrification blends polyvinyl alcohol starch organics residue