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PC2-6型柴油机高压油泵柱塞卡死故障诊断及改进措施

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内燃机与配件 2024年第3期 78-80页

作者：田野邹恺恺刘胜军海军士官学校安徽蚌埠233022 海军91860部队上海201108

船舶推进柴油机的单体式高压油泵结构复杂,零部件工艺要求高。由于高压油泵的柱塞偶件属于精密偶件,因此,固体颗粒物或水分对其的影响较大,很容易造成柱塞偶件卡死,高压油泵无法工作的故障。本文统计了某船推进柴油机高压油泵柱塞偶件... 详细信息

船舶推进柴油机的单体式高压油泵结构复杂,零部件工艺要求高。由于高压油泵的柱塞偶件属于精密偶件,因此,固体颗粒物或水分对其的影响较大,很容易造成柱塞偶件卡死,高压油泵无法工作的故障。本文统计了某船推进柴油机高压油泵柱塞偶件卡死的故障案例,分析了高压油泵卡死的原因,并依据日常的经验提出解决方案和优化措施,对后续解决同类故障具有一定的实践参考价值。维护管理人员应当在使用操作和维护保养过程中做到“规范操作、正确使用、及时保养”,就能够大大减少高压油泵柱塞卡死这类故障的发生。

关键词：柴油机高压油泵柱塞卡死

基于LDA-IBES-RELM的光伏阵列故障诊断方法

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上海电机学院学报 2024年第1期27卷 1-6,19页

作者：邹凯曾宪文王洋高桂革(指导) 上海电机学院电气学院上海201306 上海电机学院电子信息学院上海201306

针对光伏阵列故障诊断准确率偏低的问题,提出了一种基于改进秃鹰搜索算法(IBES)优化正则化极限学习机(RELM)的故障诊断方法。首先在Simulink建立光伏阵列仿真模型,模拟典型故障并提取故障特征数据,同时利用线性判别分析(LDA)对特征量降... 详细信息

针对光伏阵列故障诊断准确率偏低的问题,提出了一种基于改进秃鹰搜索算法(IBES)优化正则化极限学习机(RELM)的故障诊断方法。首先在Simulink建立光伏阵列仿真模型,模拟典型故障并提取故障特征数据,同时利用线性判别分析(LDA)对特征量降维作为故障诊断模型的输入;其次利用Logistic混沌映射、Levy飞行策略和柯西高斯变异扰动策略对秃鹰算法进行改进;最后将IBES用于对RELM的隐层参数寻优。实验结果表明:LDA-IBES-RELM模型与BES-RELM、IBES-RELM模型对比,得到的故障诊断准确率为97.71%,优于其他两种模型,验证了LDA-IBESRELM模型用于光伏阵列故障诊断的有效性和实用性。

关键词：正则化极限学习机光伏阵列故障诊断改进秃鹰搜索算法线性判别分析

Superconducting nanowire multi-photon detectors enabled by current reservoirs

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Photonics Research 2020年第4期8卷 601-609页

作者： kai zou YUN MENG ZHAO WANG XIAOLONG HU School of Precision Instrument and Optoelectronic Engineering Tianjin UniversityTianjin 300072China Key Laboratory of Optoelectronic Information Science and Technology Ministry of EducationTianjin 300072China

Single-photon detectors are ubiquitous devices in quantum-photonic-based communication,computation,metrology,and sensing.In these applications,N-fold coincidence photon counting is often needed,for example,to characterize entanglement.However,N-fold coincidence photon counting typically requires N individual singlephoton detectors and associated bias and readout electronics,and these resources could become prohibitive if N goes large and the detectors need to work at cryogenic temperatures.Here,to break this limit on N,we propose a device architecture based on N cascaded photosensitive superconducting nanowires and one wider nanowire that functions as a current reservoir.We show that by strategically designing the device,the network of these superconducting nanowires can work in a synergic manner as an n-photon detector,where n can be from 1 to N,depending on the bias conditions.We therefore name the devices of this type superconducting nanowire multi-photon detectors(SNMPDs).In addition to its simple one-port bias and readout circuitry,the coincidences are counted internally in the detector,eliminating the need for external multi-channel,time-correlated pulse counters.We believe that the SNMPDs proposed in this work could open avenues towards conveniently measuring high-order temporal correlations of light and characterizing multi-photon entanglement.

关键词： Superconducting nanowire multi-photon detectors current reservoirs

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新建高速铁路与既有线并行区段精细化选线

铁道建筑 2024年第3期64卷 1-7页

作者：杨书生高岩朱蔡亦伊邹凯刘托何庆西南交通大学高速铁路线路工程教育部重点实验室成都610031 西南交通大学土木工程学院成都610031 济青高速铁路有限公司济南250013 中国铁路设计集团有限公司天津300308

在用地紧张、拆迁成本高昂的城区,当新建铁路与既有铁路共用车站和走廊带时,会极大地增加线路设计的难度。针对这一问题,本文提出了一种在人工线路方案的基础上进行铁路线路精细优化设计的方法。通过改进现有动态规划算法,对线路平、纵... 详细信息

在用地紧张、拆迁成本高昂的城区,当新建铁路与既有铁路共用车站和走廊带时,会极大地增加线路设计的难度。针对这一问题,本文提出了一种在人工线路方案的基础上进行铁路线路精细优化设计的方法。通过改进现有动态规划算法,对线路平、纵断面的线形参数进行精细化调整,以线路工程总造价为目标函数,在特定的约束、搜索范围和精度等条件下获取全局最优解,并将提出的线形优化模型框架应用在山东省某高速铁路项目路段。结果表明,该优化方法能够有效地优化铁路设计线形参数,使得房屋拆迁面积和新建线路与既有线间用地面积分别降低了4.61%、3.39%,节省了2.75%的工程总造价。

关键词：铁路选线既有线并行动态规划精细化设计用地面积

Cloning and Expression Analysis of RrMYB113 Gene Related to Anthocyanin Biosynthesis in Rosa rugose

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American Journal of Plant Sciences 2018年第4期9卷 701-710页

作者： kai zou Yang Wang Mingyuan Zhao Lanyong Zhao Zongda Xu Forestry College of Shandong Agricultural University Tai’an China

Anthocyanin is one of water-soluble natural pigments widely existing in flowers, fruits, stems, leaves and seeds of plants, and it is the major factor conferring pink or red to the petals of Rosa rugose. MYB TFs play an important role in the anthocyanin synthesis in plants. This work aimed to clone the MYB gene related to anthocyanin synthesis in the petals of Rosa rugose, and explore the relationship between them to lay a good foundation for gene engineering improvement of R. rugose. Based on the transcriptional data, a full-length cDNA sequence of MYB Gene, RrMYB113 (GenBank accession Nos MG720012), was cloned at the first time from the petals of Rosa rugose “Zi zhi” with RT-PCR and RACE methods. The full-length cDNA is 885 bp with an open reading frame of 654 bp, encoding 216 amino acids. The derived RrMYB113 protein has a molecular weight of 25,297.64 Da, a calculated pI of 9.61, a R2R3-MYB domain and bHLH binding domain, and it also has the signature motifs ((A/S/G)NDV and KPRPR(T/S)), thus belonging to Sg6 R2R3-MYB subfamily. In the secondary structure of RrMYB113 protein, there is 37.04% α-helix, 39.81% random coil, 14.81% extended peptide chain, and 8.33% β-corner. There is no transmembrane domain and no signal peptide cleavage site, seventeen Ser phosphorylation sites, fifteen Thr phosphorylation sites, four Tyr phosphorylation sites, and no O-glycosylation sites. The expression of RrMYB113 increased with the color deepening in petals, and it expressed at a higher level in petals than in other tissues of R. rugose “Zi zhi”. These results are meaningful to reveal that RrMYB113 might be an important regulator in anthocyanin biosynthesis and coloration in the petals of R. rugose.

关键词： Rosa rugose Anthocyanin R2R3-MYB Gene Expression

Cloning and Expression of Anthocyanin Biosynthesis Related Gene RrMYB6 in Rosa rugosa

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Agricultural Sciences 2018年第3期9卷 374-383页

作者： kai zou Yang Wang Mingyuan Zhao Lanyong Zhao Zongda Xu Forestry College of Shandong Agricultural University Tai’an China

R2R3-MYB transcription factor plays an important role in plant anthocyanin synthesis. Based on the transcriptional database of Rosa rugosa, one MYB transcription factor related to floral color, RrMYB6, was cloned. By using bioinformatics analysis method, cloning MYB gene and analyzing its function in anthocyanin biosynthesis regulation, we hope to lay a solid foundation for new color variety breeding of R. rugosa. Using the R. rugosa “Zi zhi” as the material, we obtained the total length of cDNA of RrMYB6 by RT-PCR and RACE. By analyzing its bioinformatics, we found that the formula of the protein was C1491H2368N452O470S17, molecular weight was 34690.97 Da, the theoretical pI was 8.74. In addition, it belonged to unstable protein with an unstable index at 50.59, and it was also a hydrophilic protein with the total average hydrophobic index at -0.847. In the secondary structure of RrMYB6 protein, the Alpha helix accounted for 32.35%, random coil was 47.39%, extended strand was 11.11%, and beta turn was 9.15%. The sequence analysis showed that RrMYB6 had a typical R2R3-MYB domain and bHLH binding domain, and it also had an N1, C1, C2 inhibitory motif, belonging to the Sg4 subfamily MYB protein. What’s more, evolutionary analysis indicated that the RrMYB6 protein was closely related with the MYB protein in Rosacea family, while it was far from those in other families. The expression analysis showed that RrMYB6 protein decreased with the color of petals deeping, and its expression was the lowest in the petals while the highest in stamens. According to the above results, it was speculated that RrMYB6 was involved in regulating the anthocyanin synthesis of R. rugosa, which belonged to negative regulatory mechanism.

关键词： Rosa rugosa Anthocyanin R2R3-MYB Gene Expression

基于FPGA的自滑动同步法TFT-LCD屏TCON的实现

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中国电子科学研究院学报 2024年第1期19卷 30-41页

作者：王哲祝月文王素珍邹开元青岛大学电子信息学院山东青岛266071 海信智动精工有限公司山东青岛266520

不同厂家、不同尺寸、不同分辨率的TFT-LCD屏与时序控制器TCON的接口不同,对应不同的差分信号格式。为了适应不同屏的图像显示,需要一种可编程的时序控制器TCON。通过在FPGA芯片上采用自滑动同步法,实现了TFT-LCD屏的TCON系统。该系统... 详细信息

不同厂家、不同尺寸、不同分辨率的TFT-LCD屏与时序控制器TCON的接口不同,对应不同的差分信号格式。为了适应不同屏的图像显示,需要一种可编程的时序控制器TCON。通过在FPGA芯片上采用自滑动同步法,实现了TFT-LCD屏的TCON系统。该系统从视频处理主板输出的差分信号中提取视频数据,提出通过自滑动同步法使之与同步控制信号对齐;将提取的视频数据转换为源驱动器的输入信号,即mini-LVDS或RSDS格式的差分信号,同时产生门驱动器的时序信号;由源驱动器和门驱动器输出的信号驱动TFT-LCD屏显示图像信号。为了测试TCON的性能,使用两块FPGA电路板进行实验。一块FPGA电路板实现TCON时序控制器;另一块作为TCON的输入测试信号源,用于测试所设计的TCON性能。实验结果显示,所设计的TCON能够从LVDS视频差分数据中正确解析出视频数据,并转换为屏的源驱动器和门驱动器信号,驱动TFT-LCD屏显示视频信号。通过对比分析可知,使用自滑动同步法具有资源消耗少,功耗较低等优点。

关键词： TCON FPGA LVDS信号自滑动同步法源驱动器门驱动器

多种分辨率HDMI接口的TMDS信号转为LVDS格式实现方法研究

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中国电子科学研究院学报 2024年第3期19卷 272-280页

作者：祝月文王哲王素珍邹开元青岛大学电子信息学院山东青岛266071 海信智动精工有限公司山东青岛266520

为了将图像仿真系统输出的高清多媒体接口(High Definition Multimedia Interface,HDMI)最小化传输差分信号(Transition Minimized Differential Signaling,TMDS)转换为摄像头模组接口低电压差分信号(Low-Voltage Differential Signaling,LVDS),文章联合使用ITE68051芯片和现场可编程逻辑门阵列芯片(Field Programmable Gate Array,FPGA)实现了相应的转换。首先,将高清、超高清HDMI接口的TMDS信号通过ITE68051视频处理芯片进行TMDS解码,以双端口方式输出并行RGB数字信号;然后,应用FPGA易编程性的特点,将多种分辨率的RGB信号转换为相应的LVDS信号。联合应用ITE68051和FPGA芯片架构的转换系统,便于视频设备之间的兼容和系统后续升级,为自动驾驶仿真系统的视频信号输入提供了可靠的硬件接口通道。

关键词：现场可编程逻辑门阵列 ITE68051视频处理芯片最小化传输差分信号低电压差分信号高清多媒体接口

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铣抛式烟草开沟培土机设计与试验

中国农机装备 2024年第1期 2-8页

作者：王成伟邹凯肖和友张晟罗海峰湖南农业大学机电工程学院长沙410128 湖南省邵阳市烟草公司邵阳422000 湖南省邵阳市新宁县烟草公司邵阳422000

针对烟草机械化开沟培土作业过程中土壤抛送与落点等问题,采用“切土刀碎土—培土刀抛送—螺旋输送推出”的作业方式,设计了一种铣抛式烟草开沟培土机。依据其工作原理,对关键部件进行了分析设计。田间作业试验结果表明,开沟培土作业后... 详细信息

针对烟草机械化开沟培土作业过程中土壤抛送与落点等问题,采用“切土刀碎土—培土刀抛送—螺旋输送推出”的作业方式,设计了一种铣抛式烟草开沟培土机。依据其工作原理,对关键部件进行了分析设计。田间作业试验结果表明,开沟培土作业后垄沟土壤细碎,培土量充足,培土平均高度64.9mm,平均幅宽187.1mm。铣抛式烟草开沟培土机作业质量满足烟田开沟培土需求。

关键词：烟草开沟培土机铣抛式