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基于AHP方法的行星齿轮箱箱体阻尼敷设方案评价研究

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热能动力工程 2024年第3期39卷 200-206页

作者：魏博文常山栾圣罡张坤中国船舶集团有限公司第七〇三研究所黑龙江哈尔滨150078

针对行星齿轮箱箱体阻尼敷设方案减振效果评价问题,以某型行星变频调速齿轮箱为研究对象,基于层次分析法(AHP)建立阻尼敷设方案评价指标体系,以阻尼层厚度和阻尼材料损耗因子作为方案的定量指标,并结合方案的定性指标多方案对比分析,选... 详细信息

针对行星齿轮箱箱体阻尼敷设方案减振效果评价问题,以某型行星变频调速齿轮箱为研究对象,基于层次分析法(AHP)建立阻尼敷设方案评价指标体系,以阻尼层厚度和阻尼材料损耗因子作为方案的定量指标,并结合方案的定性指标多方案对比分析,选出最优的阻尼敷设方案。建立了5种箱体阻尼敷设方案的有限元模型,仿真分析得出模型机脚测点的振动加速度级。结果表明:阻尼层厚度和阻尼材料损耗因子对测点处机脚振动加速度级大小影响显著;选用SA-3为阻尼材料、阻尼厚度为14 mm的方案5,经指标体系评价确定为最优阻尼敷设方案,较原模型振动加速度级峰值平均下降了1.64 dB,优于其他4种阻尼敷设方案,验证了评价方法的正确性。

关键词：齿轮箱层次分析法综合评价阻尼减振

A New Wave of Hormone Research： Crosstalk Mechanisms

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Molecular Plant 2012年第5期5卷 959-960页

作者： Xiaofeng Cui sheng luan Deputy Editor-in-Chief Molecular Plant Editor-in-Chief Molecular Plant

Phytohormones regulate numerous aspects of plant growth, development, and responses to biotic and abiotic stress conditions. At least seven groups of phytohormones have been well characterized, including abscisic acid （ABA）, auxin, brassinosteroid （BR）, cytokinin （CK）, ethylene, gibberellin （GA）, and jasmonate （JA）. Hormone research in the past dec- ades has focused on elucidating signal transduction pathways from hormone perception to response and such effort has been well paid off by recent discoveries of almost all recep- tors for major classes of plant hormones.

关键词： Hormone Research Mechanism

A SPX domain vacuolar transporter links phosphate sensing to homeostasis in Arabidopsis

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Molecular Plant 2022年第10期15卷 1590-1601页

作者： Mingda luan Fugeng Zhao Guangfang Sun Min Xu Aigen Fu Wenzhi Lan sheng luan Key Laboratory of Resource Biology and Biotechnology in Western China Ministry of EducationProvincial Key Laboratory of BiotechnologyCollege of Life SciencesNorthwest UniversityXi'an 710069China Institute of Future Agriculture Northwest Agriculture and Forestry UniversityYanglingShaanxi 712100China School of Life Sciences Nanjing UniversityNanjingJiangsu 210023China Department of Plant and Microbial Biology University of CaliforniaBerkeleyBerkeleyCA 94720USA

Excess phosphate(Pi)is stored into the vacuole through Pi transporters so that cytoplasmic Pi levels remain stable in plant *** hypothesized that the vacuolar Pi transporters may harbor a Pi-sensing mechanism so that they are activated to deliver Pi into the vacuole only when cytosolic Pi reaches a threshold high *** tested this hypothesis using Vacuolar Phosphate Transporter 1(VPT1),a SPX domain-containing vacuolar Pi transporter,as a *** studies have defined SPX as a Pi-sensing module that binds inositol polyphosphate signaling molecules(InsPs)produced at high cellular Pi *** showed here that Pi-deficient conditions or mutation of the SPX domain severely impaired the transport activity of *** further identified an auto-inhibitory domain in VPT1 that suppresses its transport *** together the results from detailed structure-function analyses,our study suggests that VPT1 is in the auto-inhibitory state when Pi status is low,whereas at high cellular Pi status InsPs are produced and bind SPX domain to switch on VPT1 activity to deliver Pi into the *** thus provides an auto-regulatory mechanism for VPT1-mediated Pi sensing and homeostasis in plant cells.

关键词： VPT1 Pi signaling autoinhibition transport activity inositol phosphates

From Receptor-Like Kinases to Calcium Spikes： What Are the Missing Links？

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Molecular Plant 2014年第10期7卷 1501-1504页

作者： Feng Yu[a],, Wang Tian[b], sheng luan[b],[c], a Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation Hunan University Changsha 410082 P.R. Chinab Department of Plant and Microbial Biology University of California Berkeley CA 94720 USAc NJU-NJFU Joint Institute for Plant Molecular Biology School of Life Sciences Nanjing University Nanjing 210093 P.R. China

As sessile organisms, plants have evolved with complex signaling networks to cope with the constantly changing environment. Receptor-like kinases （RLKs） and calcium both play important roles during the early stage of envi- ronmental responses in plants. RLKs are trans-membrane receptor kinases that sense extracellular signals, such as hormones, peptides, and pathogens, and trigger sig- nal transduction pathways leading to cellular responses （Osakabe et al., 2013）.

关键词： ARABIDOPSIS PERCEPTION ATPEPR1

零鱼粉饲料与高鱼粉饲料饲喂下凡纳对虾饲料利用效率相关性状的遗传评估

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渔业科学进展 2024年第5期45卷 174-182页

作者：朱相燕孟宪红代平孔杰栾生曹家旺谭建邢群浙江海洋大学水产学院浙江舟山316022 中国水产科学研究院黄海水产研究所、海水养殖生物育种与可持续产出全国重点实验室山东青岛266071 青岛海洋科技中心海洋渔业科学与食物产出过程功能实验室山东青岛266237 邦普种业科技有限公司山东潍坊261311

为探讨选育零鱼粉需求凡纳对虾(Penaeus vannamei)品种的可能性,解决目前鱼粉短缺、饲料成本居高不下的问题,本研究在零鱼粉饲料(蛋白含量占38%)和高鱼粉饲料(鱼粉含量占25%,蛋白含量占42%)饲喂条件下进行凡纳对虾饲料利用效率相关性状... 详细信息

为探讨选育零鱼粉需求凡纳对虾(Penaeus vannamei)品种的可能性,解决目前鱼粉短缺、饲料成本居高不下的问题,本研究在零鱼粉饲料(蛋白含量占38%)和高鱼粉饲料(鱼粉含量占25%,蛋白含量占42%)饲喂条件下进行凡纳对虾饲料利用效率相关性状的遗传评估。选择30个家系进行40 d的单尾饲养实验,结果显示,饲喂高鱼粉饲料对虾的平均增重率(62.00%)和平均饲料效率比(124.00%)明显高于饲喂零鱼粉饲料(23.50%和49.40%)。对虾摄食量和增重率在零鱼粉饲料和高鱼粉饲料饲喂下的遗传力在0.458±0.140到0.699±0.155之间,饲料效率比在零鱼粉饲料和高鱼粉饲料饲喂下的遗传力分别为0.186±0.098和0.341±0.110。由于没有剖分出共同环境效应,遗传力都存在一定程度高估,因此,零鱼粉饲料饲喂下的饲料效率比的遗传变异并不高。摄食量和增重率在2种饲料间的遗传相关分别为0.580±0.171和0.676±0.155,表示这2个性状存在中等的基因型与饲料互作效应。饲料效率比在2种饲料间的遗传相关仅为0.299±0.304,表示该性状存在严重的基因型与饲料互作效应。综上结果来看,使用零鱼粉饲料不利于凡纳对虾的养殖及选育工作的开展。

关键词：凡纳对虾饲料效率比遗传力遗传相关基因型与饲料互作

Optomechanically-induced-transparency cooling of massive mechanical resonators to the quantum ground state

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Science China(Physics,Mechanics & Astronomy) 2015年第5期58卷 46-51页

作者： LIU Yong-Chun XIAO Yun-Feng luan Xing-sheng WONG Chee Wei State Key Laboratory for Mesoscopic Physics and School of Physics Peking University Collaborative Innovation Center of Quantum Matter Optical Nanostructures Laboratory Columbia University

Ground state cooling of massive mechanical objects remains a difficult task restricted by the unresolved mechanical sidebands. We propose an optomechanically-induced-transparency cooling scheme to achieve ground state cooling of mechanical motion without the resolved sideband condition in a pure optomechanical system with two mechanical modes coupled to the same optical cavity mode. We show that ground state cooling is achievable for sideband resolution ωm/k as low as - 0.003. This provides a new route for quantum manipulation of massive macroscopic devices and high-precision measurements.

关键词： ground state cooling resolved sideband limit optomechanics

A Calcium-Dependent Protein Kinase Interactswith and Activates A Calcium Channel toRequlate Pollen Tube Growth

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Molecular Plant 2014年第2期7卷 369-376页

作者： Liming Zhou Wenzhi Lan Yuanqing Jiang Wei Fang sheng luan Department of Plant and Microbial Biology University of California Berkeley CA 94720 USA College of Life Sciences Hebei United University Tangshan Hebei 063000 China NJU–NJFU Joint Institute for Plant Molecular Biology School of Life Sciences Nanjing University Nanjing 210093 China

ABSTRACT Calcium, as a ubiquitous second messenger, plays essential roles in tip-growing cells, such as animal neu-rons, plant pollen tubes, and root hairs. However, little is known concerning the regulatory mechanisms that code anddecode Ca2＋ signals in plants. The evidence presented here indicates that a calcium-dependent protein kinase, CPK32,controls polar growth of pollen tubes. Overexpression of CPK32 disrupted the polar growth along with excessive Ca2＋accumulation in the tip. A search of downstream effector molecules for CPK32 led to identification of a cyclic nucleotide-gated channel, CNGC18, as an interacting partner for CPK32. Co-expression of CPK32 and CNGC18 resulted in activationof CNGC18 in Xenopus oocytes where expression of CNGC18 alone did not exhibit significant calcium channel *** of CNGC18 produced a growth arrest phenotype coupled with accumulation of calcium in the tip, simi-lar to that induced by CPK32 overexpression. Co-expression of CPK32 and CNGC18 had a synergistic effect leading tomore severe depolarization of pollen tube growth. These results provide a potential feed-forward mechanism in whichcalcium-activated CPK32 activates CNGC18, further promoting calcium entry during the elevation phase of Ca2＋ oscilla-tions in the polar growth of pollen tubes.

关键词： pollen tubes calcium-dependent protein kinase cyclic nucleotide-gated channel Ca2+ oscillations

Diverse Transcriptional Programs Associated with Environmental Stress and Hormones in the Arabidopsis Receptor-Like Kinase Gene Family

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Molecular Plant 2009年第1期2卷 84-107页

作者： Lee Chae Sylvia Sudat Sandrine Dudoit Tong Zhu sheng luan Department of Plant and Microbial Biology University of California Berkeley CA 94720 USA Division of Biostatistics School of Public Health University of California Berkeley CA 94720 USA Syngenta Biotechnology Inc. Research Triangle Park NC 27709 USA

The genome ofArabidopsis thaliana encodes more than 600 receptor-like kinase （RLK） genes, by far the dominant class of receptors found in land plants. Although similar to the mammalian receptor tyrosine kinases, plant RLKs are serine/threonine kinases that represent a novel signaling innovation unique to plants and, consequently, an excellent opportunity to understand how extracellular signaling evolved and functions in plants as opposed to animals. RLKs are predicted to be major components of the signaling pathways that allow plants to respond to environmental and developmental conditions. However, breakthroughs in identifying these processes have been limited to only a handful of individual RLKs. Here, we used a Syngenta custom Arabidopsis GeneChip array to compile a detailed profile of the tran- scriptional activity of 604 receptor-like kinase genes after exposure to a cross-section of known signaling factors in plants, including abiotic stresses, biotic stresses, and hormones. In the 68 experiments comprising the study, we found that 582 of the 604 RLK genes displayed a two-fold or greater change in expression to at least one of 12 types of treatments, thereby providing a large body of experimental evidence for targeted functional screens of individual RLK genes. We investigated whether particular subfamilies of RLK genes are responsive to specific types of signals and found that each subfamily displayed broad ranges of expression, as opposed to being targeted towards particular signal classes. Finally, by analyzing the divergence of sequence and gene expression among the RLK subfamilies, we present evidence as to the functional basis for the expansion of the RLKs and how this expansion may have affected conservation and divergences in their function. Taken as a whole, our study represents a preliminary, working model of processes and interactions in which the members of the RLK gene family may be involved, where such information has remained elusive for so many

关键词： Abiotic/environmental stress hormone biology receptors transcriptome analysis disease responses Arabidopsis.

Estimating genetic parameters with molecular relatedness and pedigree reconstruction for growth traits in early mixed breeding of juvenile turbot

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Acta Oceanologica Sinica 2021年第9期40卷 66-73页

作者： Song Sun Weiji Wang Yulong Hu sheng luan Ding Lyu Jie Kong College of Fisheries and Life Science Shanghai Ocean UniversityShanghai 201306China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266071China Key Laboratory for Sustainable Development of Marine Fisheries Resources of Ministry of Agriculture Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China

An introduced turbot population was used to establish families and to estimate genetic parameters of the offspring. However, there is a lack of pedigree information, and common environmental effects can be introduced when each full-sib family is raised in a single tank. Therefore, in the genetic evaluation, SSRs(simple sequence repeats) were used to reconstruct the pedigree and to calculate molecular relatedness between individuals, and the early mixed-family culture model was used to remove the impact of the common environmental effects. After100 d of early mixed culture, twenty SSRs were used to cluster 20 families and to calculate paired molecular relationships(n=880). Additive genetic matrices were constructed using molecular relatedness(MR) and pedigree reconstruction(PR) and were then applied to the same animal model to estimate genetic parameters. Based on PR, the heritabilities for body weight and body length were 0.214±0.124 and 0.117±0.141, and based on MR they were 0.101±0.031 and 0.102±0.034, respectively. Cross validation showed that the accuracies of the estimated breeding values based on MR(body weight and body length of 0.717±0.045 and 0.629±0.141, respectively) were higher than those of PR(body weight and body length of 0.692±0.052 and 0.615±0.060, respectively). The MR method ensure availability of all genotyped selection candidates, thereby improving the accuracy of the breeding value estimation.

关键词： turbot SSR genetic parameter mixed breeding