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基于IAOA优化XGBoost的柴油机性能预测研究

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昆明理工大学学报（自然科学版） 2024年第5期49卷 108-118页

作者：赵友王贵勇申立中李进龙曾柏舜谢亚辉柳州职业技术大学汽车工程学院广西柳州545006 昆明理工大学云南省内燃机重点实验室云南昆明650500

柴油机是一个非线性、高耦合的复杂系统,为了准确预测其性能和变化规律,提出了一种基于改进算术优化算法与极限梯度树结合的性能预测方法.针对算术优化算法本身的缺陷,将莱维飞行、高斯变异和贪心策略融入算法中,提升算法的寻优能力;基... 详细信息

柴油机是一个非线性、高耦合的复杂系统,为了准确预测其性能和变化规律,提出了一种基于改进算术优化算法与极限梯度树结合的性能预测方法.针对算术优化算法本身的缺陷,将莱维飞行、高斯变异和贪心策略融入算法中,提升算法的寻优能力;基于改进后的算术优化算法优化极限梯度树模型的超参数,提升模型的预测精度,形成了一种行之有效的柴油机性能预测方法.研究结果表明:相较于BP神经网络、支持向量机和未优化的极限梯度树模型,经过改进算术优化算法优化的极限梯度树模型有着更高的预测精度,对柴油机比油耗、HC比排放、CO比排放、NO x比排放和涡前排温的预测结果决定系数均大于0.97,且预测值与试验值有较好的相关性.

关键词：柴油机极限梯度树算术优化算法性能预测

Extraction of material parameters of a bi-layer structure using Terahertz time-domain spectroscopy

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Science China(Information Sciences) 2014年第8期57卷 238-247页

作者： JIN BiaoBing ZHANG CaiHong shen XiaoFang MA jinlong CHEN Jian SHI shengCai WU PeiHeng Research Institute of Superconductor Electronics (RISE) School of Electronic Science and EngineeringNanjing University Purple Mountain Observatory Chinese Academy of Sciences Graduate School of Chinese Academy of Sciences Chinese Academy of Sciences

For a bi-layer structure consisting of a film deposited on a substrate,a new extraction method is proposed using which we can extract both the material parameters of the film and the thickness of the substrate from the measured Terahertz transmission through it,so long as the complex refractive index of the substrate is known *** method is applicable to a range of refractive indices of the film less than the refractive index of the substrate and a very wide range of layer thicknesses from 20μm to at least 200μ*** is very useful in some cases where the thickness of the substrate cannot be determined using conventional methods such as a Vernier caliper or micrometer screw.

关键词： material parameter Terahertz spectrum extraction method anti-reflection coating layer THztime-domain spectroscopy

‘巴山早’紫色芽叶绿茶加工过程中内含成分的变化及品质分析

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四川农业大学学报 2024年第2期42卷 346-355页

作者：罗金龙陈盛相郑文佳杨肖委张小琴刘晓霞沈强贵州省茶叶研究所贵阳550006 四川农业大学园艺学院成都611130

【目的】探究‘巴山早’紫色芽叶绿茶加工过程中内含成分的变化规律及其品质特点。【方法】选用‘巴山早’紫色芽叶为原料,在‘巴山早’紫色芽叶绿茶加工过程中取鲜叶、杀青叶、揉捻叶、二青叶、二揉叶和烘干叶,对各样品理化成分进行测... 详细信息

【目的】探究‘巴山早’紫色芽叶绿茶加工过程中内含成分的变化规律及其品质特点。【方法】选用‘巴山早’紫色芽叶为原料,在‘巴山早’紫色芽叶绿茶加工过程中取鲜叶、杀青叶、揉捻叶、二青叶、二揉叶和烘干叶,对各样品理化成分进行测定分析;以‘福鼎大白茶’绿色芽叶为对照,采一芽一叶新梢,在相同加工条件下制成绿茶,所制茶样与‘巴山早’紫色芽叶绿茶通过感官审评分析、内含品质成分测定分析和香气组分检测分析,对比评价‘巴山早’紫色芽叶绿茶品质。【结果】绿茶加工过程中,成品茶的茶多酚、可溶性糖、咖啡碱、花青素、总叶绿素、EGCG、GCG、ECG、CG含量和儿茶素组分总量相较于鲜叶降幅分别为10.89%、4.88%、4.55%、28.25%、8.07%、10.58%、22.35%、6.49%、10.49%和6.77%,水浸出物、氨基酸、EGC、C和EC含量相较于鲜叶增幅分别为5.76%、6.57%、4.81%、18.03%和5.01%。‘巴山早’紫色芽叶绿茶相较于对照香气明显较优,且氨基酸、水浸出物、可溶性糖、咖啡碱、简单儿茶素、总氨基酸组分和呈鲜爽味游离氨基酸的含量分别比对照显著高31.62%、5.19%、6.67%、13.37%、7.87%、39.17%和44.51%,花青素含量比对照高4.74 mg/g;紫色芽叶绿茶香气组分42种,总含量19.57μg/g,对照33种,总含量16.42μg/g,‘巴山早’紫色芽叶绿茶香气化合物总量比对照高19.18%。【结论】‘巴山早’紫色芽叶绿茶加工过程中,其内含品质成分含量向利于绿茶品质的方向转化,‘巴山早’紫色芽叶所制绿茶品质优异。

关键词：巴山早紫色芽叶绿茶品质

Facile preparation of multifunctional Cu_(2−x)S/S/rGO composite for all-round residual water remediation during interfacial solar driven water evaporation process

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Nano Research 2023年第4期16卷 5953-5963页

作者： Chaorui Xue Yang shen Qian Zhang Qing Chang Ning Li Ying Li Wenjing Zheng shengliang Hu jinlong Yang School of Energy and Power Engineering North University of ChinaTaiyuan 030051China School of Materials Science and Engineering North University of ChinaTaiyuan 030051China State Key Laboratory of New Ceramics and Fine Processing Tsinghua UniversityBeijing 100084China

Presently,interfacial solar water evaporation(ISWE)is now injecting new vitality into the field of water ***,during the ISWE process,the nonvolatile pollutants might be concentrated in residual water,and further contaminate the *** advanced photothermal materials is in need to get comprehensive purification of various pollutants in residual ***,we report a facile laser thermal method to prepare Cu_(2−x)S/sulfur/reduced graphene oxide(Cu_(2−x)S/S/rGO)nanocomposites for realizing all-round residual water remediation during the ISWE *** as-prepared Cu2−xS/S/rGO nanocomposites demonstrated excellent photothermal and photocatalytic *** blending with GO nanosheets having excellent adsorption capacity,the synergetic effect of photothermal,photocatalytic,and adsorption properties resulted in highly efficient purification of rhodamine B,bacterial,and heavy metal ions in residual water during the ISWE *** experimental results also showed that,increasing solar light intensity can promote the residual water remediation,but ultrafast water evaporation under high light intensity may deteriorate the purifying *** report may pave a new way to prepare multifunctional materials for water remediation through the ISWE technology.

关键词： solar water evaporation photothermal laser thermal photocatalysis anti-bacterial

An efficient three-component domino synthesis of difluoromethyl-containing 1,4-dihydropyridines under solvent and catalyst free conditions

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Science China Chemistry 2010年第7期53卷 1509-1513页

作者： LI Hui YU jinlong CAO Song shen Li WU MingXi CHENG JianHang QIAN XuHong Shanghai Key Laboratory of Chemical Biology Center of Fluorine Chemical TechnologySchool of PharmacyEast China University of Science and TechnologyShanghai 200237China

The difluoromethyl-containing Hantzsch 1,4-dihydropyridines were synthesized in good yields by a one-pot cyclocondensation of ethyl difluoroacetoacetate (EDFAA),a variety of aromatic aldehydes and ammonium acetate under solvent and catalyst free *** comparison of reaction conditions and products was made among the different 1,3-carbonyl substrates (ethyl acetoacetate,ethyl difluoroacetoacetate and ethyl trifluoroacetoacetate) for the Hantzsch reaction.

关键词： three-component difluoromethyl 1,4-dihydropyridines ethyl difluoroacetoacetate

Cbln1和Cbln4在结构上相似但与GluD2相互作用显著不同

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科学新闻 2018年第4期 140-140页

作者：钟琛 jinlong shen Huibing Zhang Guangyi Li Senlin shen Fang Wang Kuan Hu Longxing Cao Yongning He 丁建平中国科学院上海生命科学研究院生物化学与细胞生物学研究所

文章简介本研究以参与突触形成的Cbln家族为研究对象。Cbln家族包含4个成员,其中Cbln1通过在突触间隙中结合Nrxn蛋白和δ-谷氨酸受体参与突触形成;然而,尽管Cbln4与Cbln1有高达74%的序列等同性,文献报道Cbln4不能结合Nrxn蛋白和δ-谷氨... 详细信息

文章简介本研究以参与突触形成的Cbln家族为研究对象。Cbln家族包含4个成员,其中Cbln1通过在突触间隙中结合Nrxn蛋白和δ-谷氨酸受体参与突触形成;然而,尽管Cbln4与Cbln1有高达74%的序列等同性,文献报道Cbln4不能结合Nrxn蛋白和δ-谷氨酸受体,而是DCC的配体。

关键词：谷氨酸结构域三聚体 Cbln4 GluD2 Cbln1 复合物

Design and implementation of a jellyfish otolith-inspired MEMS vector hydrophone for low-frequency detection

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Microsystems & Nanoengineering 2021年第1期7卷 41-50页

作者： Renxin Wang Wei shen Wenjun Zhang jinlong Song Nansong Li Mengran Liu Guojun Zhang Chenyang Xue Wendong Zhang State Key Laboratory of Dynamic Testing Technology North University of ChinaTaiyuanChina College of Underwater Acoustic Engineering Harbin Engineering UniversityHarbinChina Hubei Key Laboratory of Modern Manufacturing Quantity Engineering School of Mechanical EngineeringHubei University of TechnologyWuhanHubeiChina

Detecting low-frequency underwater acoustic signals can be a challenge for marine *** by the notably strong response of the auditory organs of pectis jellyfish to ultralow frequencies,a kind of otolith-inspired vector hydrophone(OVH)is developed,enabled by hollow buoyant spheres atop *** parametric analysis is performed to optimize the cilium structure in order to balance the resonance frequency and *** the structural parameters of the OVH are determined,the stress distributions of various vector hydrophones are simulated and *** shock resistance of the OVH is also ***,the OVH is fabricated and *** receiving sensitivity of the OVH is measured to be as high as−202.1 dB@100 Hz(0 dB@1 V/μPa),and the average equivalent pressure sensitivity over the frequency range of interest of the OVH reaches−173.8 dB when the frequency ranges from 20 to 200 *** 3 dB polar width of the directivity pattern for the OVH is measured as 87°.Moreover,the OVH is demonstrated to operate under 10 MPa hydrostatic *** results show that the OVH is promising in low-frequency underwater acoustic detection.

关键词： underwater spheres hydrostatic

猪源*** HPI通过NLRP3/ASC/Caspase-1诱导巨噬细胞焦亡的机制

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中国兽医学报 2024年第3期44卷 450-457页

作者：沈珏邓静王浩肖金龙万全张博赵维薇赵汝肖鹏高洪云南农业大学动物医学学院云南昆明650201 云南农业大学食品科学技术学院云南昆明650201 云南农业大学动物科学技术学院云南昆明650201

为探讨猪源***高致病性毒力岛(high pathogenicity island,HPI)对巨噬细胞焦亡的影响,以内毒素(LPS)联合三磷酸腺苷(ATP)建立焦亡阳性对照,使用*** WT株(*** HPI^(+))和前期构建的*** HPI敲除株(***ΔHPI)感染巨噬细胞,在感染后不同时... 详细信息

为探讨猪源***高致病性毒力岛(high pathogenicity island,HPI)对巨噬细胞焦亡的影响,以内毒素(LPS)联合三磷酸腺苷(ATP)建立焦亡阳性对照,使用*** WT株(*** HPI^(+))和前期构建的*** HPI敲除株(***ΔHPI)感染巨噬细胞,在感染后不同时间点收集细胞,运用PI染色观察细胞膜损伤情况;RT-qPCR测定NLRP3/ASC/Caspase-1焦亡通路中关键因子的mRNA水平;共聚焦观察NLRP3和Caspase-1的炎性复合体的组装;Western blot技术测定GSDMD和cleaved-GSDMD的表达。结果显示,与***ΔHPI组相比,*** HPI^(+)焦亡通路关键因子NLRP3、ASC、Caspase-1、GSDMD及炎症因子IL-18、IL-1β的mRNA水平均升高;NLRP3和Caspase-1蛋白的表达量升高,共聚焦观察到共定位;*** HPI^(+)组的GSDMD及其活性形式cleaved-GSDMD的表达水平高于***ΔHPI组。*** HPI感染巨噬细胞后,通过上调NLRP3/ASC/Caspase-1通路中关键因子mRNA的水平,诱导NLRP3和Caspase-1炎性复合体的组装,促进cleaved-GSDMD的表达,从而加剧细胞膜损伤,最终诱导巨噬细胞发生焦亡。

关键词：大肠杆菌高致病性毒力岛巨噬细胞细胞焦亡 NLRP3/ASC/Caspase-1通路

仙茅苔黑酚龙胆二糖苷调控NF-κB/Nrf2通路抑制破骨细胞氧化应激及其骨吸收的研究

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中草药 2024年第3期55卷 822-831页

作者：李鹤鸣刘梦琴虞艳玮沈燚杜金蔓胡思婧徐金龙张泉龙秦路平张巧艳浙江中医药大学药学院浙江杭州310053 福建中医药大学药学院福建福州350108 中国人民解放军联勤保障部队第九六九医院内蒙古自治区呼和浩特010051

目的探讨仙茅苔黑酚龙胆二糖苷(orcinol gentiobioside,OGB)对氧化应激诱导的破骨细胞(osteoclasts,OCs)的作用及机制。方法可溶性核因子-κB受体活化因子配体(soluble receptor activator of nuclear factor-κB ligand,sRANKL)联合H_(2)O_(2)诱导RAW264.7细胞,建立氧化应激诱导的OCs模型;CCK-8法检测OCs活力;抗酒石酸酸性磷酸酶(tartrate resistant acid phosphatase,TRAP)染色测定OCs的数目;磷酸苯二钠法测定OCs的TRAP活性;免疫荧光法观察OCs的Factin环结构和形态,以及p65和核因子E2相关因子2(nuclear factor erythroid 2-related factor 2,Nrf2)的核转位;ELISA法测定OCs相关的生化指标;Western blotting检测骨吸收关键蛋白及核因子-κB(nuclear factor-κB,NF-κB)和Nrf2通路相关蛋白的表达。结果OGB显著抑制氧化应激诱导的OCs的形成和分化(P<0.01),并抑制TRAP活性、F-actin环的形成及其骨吸收作用(P<0.05、0.01),下调骨吸收关键蛋白c-Fos、组织蛋白酶K(cathepsin K,CTSK)、基质金属蛋白酶9(matrix metalloprotein 9,MMP9)的表达(P<0.05、0.01),降低活性氧(reactive oxygen species,ROS)和还原型辅酶II(nicotinamide adenine dinucleotide phosphate,NADPH)氧化酶4(NADPH oxidase 4,NOX4)的活性(P<0.05、0.01),增加抗氧化酶血红素加氧酶-1(heme oxygenase-1,HO-1)、醌氧化还原酶1(quinone oxidoreductase 1,NQO1)、γ-谷氨酰半胱氨酸合成酶(gamma-glutamyl cysteine synthetase,γ-GCS)的活性(P<0.05、0.01),增强OCs中Nrf2的表达和核转位,抑制肿瘤坏死因子受体相关蛋白6(tumor necrosis factor receptor-associated factor 6,TRAF6)的募集、核因子-κB抑制因子α(inhibitor of NF-κB-α,IκBα)的降解,并阻止p65的磷酸化和核转位(P<0.05)。结论OGB能够通过调控NF-κB和Nrf2通路,抑制氧化应激诱导的OCs形成分化和骨吸收作用。

关键词：仙茅苔黑酚龙胆二糖苷破骨细胞氧化应激核因子-κB通路核因子E2相关因子2通路