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A rice exocyst subunit gene SEC3A is required for anther dehiscence

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The Crop Journal 2024年第3期12卷 938-943页

作者： Ranran Tu Hong Wang Zhihao Sun Qinwen Zou jiajun wu Duo wu Nan Wang Guanghua He Rice Research Institute Key Laboratory of Application and Safety Control of Genetically Modified CropsAcademy of Agricultural SciencesSouthwest UniversityChongqing 400715China

Anther dehiscence controls optimal interaction between pollen and stigma,thereby determining the successful sexual *** regulators or mechanisms of this process remain ***,two CRISPR/Cas9 mutants of a rice exocyst subunit gene SEC3A,sec3a-1 and sec3a-2,showed anther indehiscence at anthesis and male sterility at *** viability and germination in the mutants were partly defective,whereas their female gametes undergone a normal *** or self-pollinated seeds could be produced by artificial pollination,suggesting potential use of a weak sec3a mutant as a female line during hybrid ***3A is widely expressed in various tissues,including anther *** results showed an excessive IAA accumulation and no endothecium lignification in sec3a-1/2 *** findings suggest that SEC3A appears to regulate anther dehiscence by modulating auxin signaling,providing insights into regulation of anther dehiscence and function of exocyst in plants.

关键词： Rice Male sterility Anther dehiscence Exocyst SEC3A

Statistical Approach to Basketball Players’Skill Level

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Journal of Applied Mathematics and Physics 2024年第4期12卷 1352-1363页

作者： jiajun wu School of Statistics and Mathematics Central University of Finance and Economics Beijing China

In basketball, each player’s skill level is the key to a team’s success or failure, the skill level is affected by many personal and environmental factors. A physics-informed AI statistics has become extremely important. In this article, a complex non-linear process is considered by taking into account the average points per game of each player, playing time, shooting percentage, and others. This physics-informed statistics is to construct a multiple linear regression model with physics-informed neural networks. Based on the official data provided by the American Basketball League, and combined with specific methods of R program analysis, the regression model affecting the player’s average points per game is verified, and the key factors affecting the player’s average points per game are finally elucidated. The paper provides a novel window for coaches to make meaningful in-game adjustments to team members.

关键词： Physics-Informed Statistics Multiple Linear Regression Average Score per Game R Program Analysis

Modeling and Analysis of Vibration Characteristics of Rectangular Plate with Circular Through Hole Under Complex Boundary Conditions

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Transactions of Nanjing University of Aeronautics and Astronautics 2024年第4期41卷 515-525页

作者： TANG Tianyi HE Yijie wu jiajun DONG Menglong WANG Gang NI Junfang School of Mechanical and Electrical Engineering Soochow UniversitySuzhou 215131P.R.China

This paper presents a method to study the free vibration of a plate with circular *** circular hole is regarded as a virtual small plate in which the mass density and Young's modulus are ***,the free vibration problem of the circular hole plate can be transformed into the free vibration problem of the equivalent rectangular plate with non-uniform *** model is derived from the spectral geometry method(SGM),and the displacement of the plate with circular holes is expanded by the modified Fourier *** springs are added to the boundary of the plate to simulate the boundary conditions of simply supported and fixed *** accuracy of this method is verified by comparison with the finite element calculation *** relationship between modal numerical solutions of plates with circular holes and boundary conditions and geometry of the plate is studied.

关键词： round hole plate spectral geometry method(SGM) energy method virtual spring

A polygalacturonase gene OsPG1 modulates water homeostasis in rice

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The Crop Journal 2024年第1期12卷 79-91页

作者： Qinwen Zou Ranran Tu jiajun wu Tingting Huang Zhihao Sun Zheyan Ruan Hongyu Cao Shihui Yang Xihong Shen Guanghua He Hong Wang Rice Research Institute Key Laboratory of Application and Safety Control of Genetically Modified CropsAcademy of Agricultural SciencesSouthwest UniversityChongqing 400715China State Key Laboratory of Rice Biology and Breeding Key Laboratory for Zhejiang Super Rice ResearchChina National Center for Rice ImprovementChina National Rice Research InstituteHangzhou 311401ZhejiangChina

A dynamic plant architecture is the basis of plant adaptation to changing *** many genes regulating leaf rolling have been identified,genes directly associated with water homeostasis are largely ***,we isolated a rice mutant,dynamic leaf rolling 1(dlr1),characterized by‘leaf unfolding in the morning-leaf rolling at noon-leaf unfolding in the evening’during a sunny *** content was decreased in rolled leaves and water sprayed on leaves caused reopening,indicating that in vivo water deficiency induced the leaf ***-based cloning and expression tests demonstrated that an A1400G single base mutation in Oryza sativa Polygalacturonase 1(OsPG1)/PHOTO-SENSITIVE LEAF ROLLING 1(PSL1)was responsible for the dynamic leaf rolling phenotype in the dlr1 ***1 encodes a polygalacturonase,one of the main enzymes that degrade demethylesterified homogalacturonans in plant cell ***1 was constitutively expressed in various tissues and was enriched in *** of the OsPG1 gene exhibited defects in stomatal closure and decreased stomatal density,leading to reduced transpiration and excessive water loss under specific conditions,but had normal root *** analysis revealed that mutation of OsPG1 led to reduced pectinase activity in the leaves and increased demethylesterified homogalacturonans in guard *** findings reveal a mechanism by which OsPG1 modulates water homeostasis to control dynamic leaf rolling,providing insights for plants to adapt to environmental variation.

关键词： Photosynthesis Stomata Transpiration Leaf rolling

Causality Between Gut Microbiota and Inflammatory Bowel Disease:A Bidirectional Mendelian Randomization Study

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Infectious Microbes & Diseases 2024年第2期6卷 93-99页

作者： Qi Zheng Yuetong Li Jiali Ni Yong Huang jiajun wu Xiang Xu Guoping Sheng Lanjuan Li State Key Laboratory for Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious DiseasesNational Medical Center for Infectious DiseasesCollaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesThe First Affiliated HospitalZhejiang University School of MedicineHangzhouChina Key Laboratory of Artificial Organs and Computational Medicine in Zhejiang Province Shulan(Hangzhou)Hospital Affiliated to Shulan International Medical CollegeZhejiang Shuren UniversityHangzhouChina Zhejiang Chinese Medical University HangzhouChina

The exact relationship between inflammatory bowel disease(IBD)and gut microbiota(GM)is still *** study aimed to explore the cause-and-effect relationship between IBD and GM by Mendelian randomization *** IBD data used in this study were obtained from Genome-Wide Association *** GM data were from the Dutch Microbiome Project and included 207 taxa and 205 microbiota-associated *** Mendelian randomization analysis was performed to investigate the relationship between GM and *** results demonstrated that susceptibility to developing IBD is negatively correlated with class Clostridia(OR=0.80,P=0.003),family Sutterellacea(OR=0.87,P=0.014),genus Coprobacter(OR=0.90,P=0.009),order Clostridiales(OR=0.80,P=0.003),phylum Firmicutes(OR=0.82,P=0.002)and Coprobacter fastidiosus(OR=0.90,P=0.009).Conversely,the risk of developing IBD was positively correlated with the phosphopantothenate biosynthesis I pathway(OR=1.17,P=0.006),Bacteroides caccae(OR=1.14,P=0.021)and Bacteroides uniformis(OR=1.26,P=0.003).Reverse causality was found between the phosphopantothenate biosynthesis I pathway and IBD(OR=1.03,P=0.04),but not for the remaining specific GM *** conclusion,our study demonstrated a causal relationship between specific GM features and IBD.

关键词： gut microbiota inflammatory bowel disease Mendelian randomization

Exploration of the Impact Mechanism of Government Credibility Based on Variable Screening Method

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Journal of Data Analysis and Information Processing 2024年第3期12卷 479-494页

作者： jiajun wu Yuxiang Ma Helin Zou Chun Zhang Ran Yan School of Statistics and Mathematics Central University of Finance and Economics Beijing China

Government credibility is an important asset of contemporary national governance, an important criterion for evaluating government legitimacy, and a key factor in measuring the effectiveness of government governance. In recent years, researchers’ research on government credibility has mostly focused on exploring theories and mechanisms, with little empirical research on this topic. This article intends to apply variable selection models in the field of social statistics to the issue of government credibility, in order to achieve empirical research on government credibility and explore its core influencing factors from a statistical perspective. Specifically, this article intends to use four regression-analysis-based methods and three random-forest-based methods to study the influencing factors of government credibility in various provinces in China, and compare the performance of these seven variable selection methods in different dimensions. The research results show that there are certain differences in simplicity, accuracy, and variable importance ranking among different variable selection methods, which present different importance in the study of government credibility issues. This study provides a methodological reference for variable selection models in the field of social science research, and also offers a multidimensional comparative perspective for analyzing the influencing factors of government credibility.

关键词： Government Credibility Variable Selection Models Social Statistics Regression Based Approach Method Based on Random Forest

基于辅助棱镜增强回音壁模式微腔光反馈自注入锁定方案

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中国激光 2024年第13期51卷 73-78页

作者：吴佳军钟山康松柏中国科学院精密测量科学与技术创新研究院中国科学院原子频标重点实验室湖北武汉430071 中国科学院大学北京100049

光反馈强度是微腔自注入锁定技术中实现激光线宽压窄的重要参数。设计了一种仅通过单个镀膜辅助棱镜实现晶体回音壁模式微腔(WGMR)内反馈光幅度增强的方案。实验结果显示,与腔体自身的瑞利散射相比,该方案获得的反馈光强提高了100倍以... 详细信息

光反馈强度是微腔自注入锁定技术中实现激光线宽压窄的重要参数。设计了一种仅通过单个镀膜辅助棱镜实现晶体回音壁模式微腔(WGMR)内反馈光幅度增强的方案。实验结果显示,与腔体自身的瑞利散射相比,该方案获得的反馈光强提高了100倍以上。将该方案应用于微腔自注入锁定激光器后,激光瞬时线宽降低至~7 Hz,锁定宽度增大到8 GHz,相对强度噪声降低到-152 dBc/Hz@10 MHz。该设计结构紧凑、易操控,且能与晶体WGMR实现一体化集成,为自注入锁定技术中的反馈光强度控制提供了解决方案。

关键词：激光器自注入锁定窄线宽增强光反馈回音壁模式微腔

基于双重自注意力机制和长短时记忆网络的剩余寿命预测

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系统工程与电子技术 2024年第6期46卷 1986-1994页

作者：吴嘉俊苏春张玉茹东南大学机械工程学院江苏南京211189

剩余使用寿命(remaining useful life,RUL)预测是产品故障预测与健康管理的重要内容。传统长短期记忆(long short-term memory,LSTM)网络无法主动选择关键特征、难以高效提取大数据所蕴含的退化信息。提出一种基于改进LSTM网络的RUL预... 详细信息

剩余使用寿命(remaining useful life,RUL)预测是产品故障预测与健康管理的重要内容。传统长短期记忆(long short-term memory,LSTM)网络无法主动选择关键特征、难以高效提取大数据所蕴含的退化信息。提出一种基于改进LSTM网络的RUL预测方法,采用随机森林(random forest,RF)算法筛选输入特征,以主动选取关键特征;采用双重自注意力机制分别从特征维度和时间维度完成权重自适应分配,使模型在学习过程中关注主要特征和历史时间点;通过融合统计特征,以提高RUL预测精度。以航空发动机数据集为例完成案例分析,验证方法有效性。结果表明,所提方法能有效提高基于复杂数据集的RUL预测精度。

关键词：剩余寿命预测随机森林双重自注意力机制长短期记忆网络航空发动机

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CGM水泥基灌浆料力学特性及动态本构模型

辽宁工程技术大学学报（自然科学版） 2024年第1期43卷 38-47页

作者：王晓虎于崇邓守春吴家骏中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室湖北武汉430071 中国科学院大学北京100049

为研究C-Type Grout Material(CGM)水泥基灌浆料力学特性,以及在动态加载条件下破坏失效规律,开展一系列静、动态力学测试,标定该材料Holmquist-Johnson-Cook(HJC)动态本构模型参数,基于LS-DYNA软件开展了Split Hopkinson Pressure Bar(SHPB)试验有限元动力模拟。实验结果表明:CGM水泥基灌浆料力学性质稳定,单轴受力条件下表现出明显的脆性,在有围压条件下加载具有显著的弹塑性,动态加载条件下率效应明显,应变率达到119 s^(-1)时,动态峰值强度可提高1.62倍。数值模拟结果表明:使用本文试验数据标定的HJC本构模型参数,可准确预测CGM水泥基灌浆料在不同应变率下破坏前的峰值应力和峰值应变,为该材料在动态冲击作用下应用提供参考依据。

关键词： CGM灌浆料力学试验 HJC 参数标定 LS-DYNA软件

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