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Food Science and Human Wellness 2024年

作者： Yangyang Geng shixin zhang Yana Liu Likang Qin School of Liquor and Food Engineering Guizhou University Guizhou Institute of Walnut Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education) College of Life Sciences/Institute of Agro-bioengineering Guizhou University Guizhou Academy of Forestry Guizhou Industrial Technology Research Institute of Rare Edible and Medicinal Fungi co. Ltd

Gomphus purpuraceus is an ancient wild edible mushroom. However， the niche and lignocellulose degradation system of G. purpuraceus have remained cryptic. In the current study， transcriptome and proteome sequencing of G. purpuraceus in four mediums was performed. A total of 3489 differentially expressed genes (DEGs) and 891 differentially expressed proteins (DEPs) were screened out. For the lignocellulose degradation system， a total of 61 expressed genes were annotated， including 19 genes encoding cellulase， 8 genes encoding hemicellulase， 5 genes encoding pectinase， 22 genes encoding lignin oxidase， and 7 lignin degrading auxiliary enzyme. From two-omics， morphology， and enzyme activities， we speculated that G. purpuraceus might have a limited capacity to degrade polysaccharides (starch and lignocellulose). In addition， trace amount of fumonisins (FB1 and FB2) were found in the G. purpuraceus. These results provided a new perspective for understanding the key pathways and hub genes involved in carbon metabolism of G. purpuraceus development.

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YOLOV5s object detection based on Sim SPPF hybrid pooling

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Optoelectronics Letters 2024年第6期20卷 367-371页

作者： DONG Xiuhuan LI shixin zhang Jixiang Electronic Engineering Department Tianjin University of Technology and EducationTianjin 300000China

Aiming at the problem of low surface defect detection accuracy of industrial products, an object detection method based on simplified spatial pyramid pooling fast(Sim SPPF) hybrid pooling improved you only look once version 5s(YOLOV5s) model is proposed. The algorithm introduces channel attention(CA) module, simplified SPPF feature vector pyramid and efficient intersection over union(EIOU) loss function. Feature vector pyramids fuse high-dimensional and low-dimensional features, which makes semantic information richer. The CA mechanism performs maximum pooling and average pooling operations on the feature map. Hybrid pooling comprehensively improves detection computing efficiency and accurate deployment ability. The results show that the improved YOLOV5s model is better than the original YOLOV5s model. The average test accuracy(mAP) can reach 91.8%, which can be increased by 17.4%, and the detection speed can reach 108 FPS, which can be increased by 18 FPS. The improved model is practicable, and the overall performance is better than other conventional models.

关键词： YOLOV5s object detection based on Sim SPPF hybrid pooling

A Review of Smart Materials for the Boost of Soft Actuators,Soft Sensors,and Robotics Applications

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Chinese Journal of Mechanical Engineering 2022年第2期35卷 12-27页

作者： Yufei Hao shixin zhang Bin Fang Fuchun Sun Huaping Liu Haiyuan Li School of mechanical engineering University of Science and Technology BeijingBeijing 100083China School of Engineering and Technology China University of Geosciences(Beijing)Beijing 100083China Department of Computer Science and Technology Tsinghua National Laboratory for Information Science and TechnologyTsinghua UniversityBeijing 100084China School of Automation Beijing University of Posts and TelecommunicationsBeijing 100876China

With the advance of smart material science,robotics is evolving from rigid robots to soft robots.Compared to rigid robots,soft robots can safely interact with the environment,easily navigate in unstructured fields,and be minimized to operate in narrow spaces,owning to the new actuation and sensing technologies developed by the smart materials.In the review,different actuation and sensing technologies based on different smart materials are analyzed and summarized.According to the driving or feedback signals,actuators are categorized into electrically responsive actuators,thermally responsive actuators,magnetically responsive actuators,and photoresponsive actuators;sensors are categorized into resistive sensors,capacitive sensors,magnetic sensors,and optical waveguide sensors.After introducing the principle and several robotic prototypes of some typical materials in each category of the actuators and sensors.The advantages and disadvantages of the actuators and sensors are compared based on the categories,and their potential applications in robotics are also presented.

关键词： Smart material Soft robot Actuator Sensor

DNA Methylation Variation Is Identified in Monozygotic Twins Discordant for Congenital Heart Diseases

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Congenital Heart Disease 2024年第2期19卷 247-256页

作者： Shuliang Xia Huikang Tao shixin Su Xinxin Chen Li Ma Jianru Li Bei Gao Xumei Liu Lei Pi Jinqing Feng Fengxiang Li Jia Li Zhiwei zhang Guangdong Provincial People’s Hospital Southern Medical UniversityGuangzhou510100China Department of Cardiovascular Surgery Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangdong Provincial Clinical Research Center for Child HealthGuangzhou510623China Department of Pediatric Cardiology Guangdong Cardiovascular InstituteGuangdong Provincial Key Laboratory of South China Structural Heart DiseaseGuangzhou510100China Clinical Physiology Laboratory Institute of PediatricsGuangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangdong Provincial Key Laboratory of Research in Structural Birth Defect DiseaseGuangzhou510623China Department of Echocardiogram Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangdong Provincial Clinical Research Center for Child HealthGuangzhou510623China Department of Pediatrics Washington University School of MedicineSt.LouisMO63130USA Clinical Biological Resource Bank of Guangzhou Women and Children’s Medical Center Guangzhou Medical UniversityGuangzhou510623China

Aims:Multiple genes and environmental factors are known to be involved in congenital heart disease(CHD),but epigenetic variation has received little attention.Monozygotic(MZ)twins with CHD provide a unique model for exploring this phenomenon.In order to investigate the potential role of Deoxyribonucleic Acid(DNA)methyla-tion in CHD pathogenesis,the present study examined DNA methylation variation in MZ twins discordant for CHD,especially ventricular septal defect(VSD).Methods and Results:Using genome-wide DNA methylation profiles,we identified 4004 differentially methylated regions(DMRs)in 18 MZ twin pairs discordant for CHD,and 2826 genes were identified.Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)analysis revealed a list of CHD-associated pathways.To further investigate the role of DNA methylation in VSD,data from 7 pairs of MZ twins with VSD were analyzed.We identified 1614 DMRs corresponding to 1443 genes associated with arrhythmogenic right ventricular cardiomyopathy,cyclic guanosine monopho-sphate-protein kinase G(cGMP-PKG)signaling pathway by KEGG analysis,and cell-cell adhesion,calcium ion transmembrane transport by GO analysis.A proportion of DMR-associated genes were involved in calcium signaling pathways.The methylation changes of calcium signaling genes might be related to VSD pathogenesis.Conclusion:CHD is associated with differential DNA methylation in MZ twins.CHD may be etiologically linked to DNA methylation,and methylation of calcium signaling genes may be involved in the development of VSD.

关键词： Congenital heart disease monozygotic twins methylation modification epigenetics

A 56 Gb/s DAC-DSP-based transmitter with adaptive retiming clock optimization using inverse-PR-based PD achieving 8-UI converge time in 28-nm CMOS

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Science China(Information Sciences) 2024年

作者： Shubin LIU Chenxi HAN Xiaoteng ZHAO Yuhao zhang shixin LI Hongzhi LIANG Lihong YANG zhangming ZHU Key Laboratory of Analog Integrated Circuits and Systems (Ministry of Education) School of Integrated CircuitsXidian University

With the growing demand for communication bandwidth,transmitters(TXs) are operating at higher rates, compressing the timing margin for the last 4:1 or 2:1 multiplexer(MUX). To alleviate the timing constraints, the ret...

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基于褶皱结构的可拉伸有机电致发光器件研究进展

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科学通报 2024年第1期69卷 96-111页

作者：贾士鑫张浩洋银达冯晶吉林大学电子科学与工程学院集成光电子学国家重点实验室长春130012

近年来,随着柔性和可穿戴电子设备的发展,人们对可拉伸设备的需求不断提升,促进了可拉伸电子器件的快速发展.可拉伸显示器在可拉伸电子设备中起到信息传递和人机交互的作用,是可拉伸电子设备的重要组成部分.可拉伸发光器件作为可拉伸显... 详细信息

近年来,随着柔性和可穿戴电子设备的发展,人们对可拉伸设备的需求不断提升,促进了可拉伸电子器件的快速发展.可拉伸显示器在可拉伸电子设备中起到信息传递和人机交互的作用,是可拉伸电子设备的重要组成部分.可拉伸发光器件作为可拉伸显示器的核心组成部分之一,受到广泛关注.随着材料、工艺和器件结构设计的不断发展与进步,可拉伸发光器件的研究得到快速发展,多种策略被开发出来用于实现器件的拉伸性,且器件性能显著提高.其中,基于褶皱结构的可拉伸有机电致发光器件因其优异的光电性能和机械拉伸性而在可穿戴电子设备、电子皮肤、智能服装等领域展现出较大的应用潜力,成为制备可拉伸显示器的候选器件之一.本文对基于褶皱结构可拉伸有机电致发光器件的研究进展进行综述,首先介绍了褶皱结构的形成机制及相关的理论,然后对褶皱结构型可拉伸有机电致发光器件按照拉伸维度和褶皱有序性进行分类,总结了不同类型器件的设计思路、制造方案和器件性能特点.最后,简要讨论了褶皱结构可拉伸有机电致发光器件存在的一些挑战及对未来的展望.

关键词：可拉伸电子器件可拉伸有机电致发光器件褶皱结构超薄柔性器件弹性衬底

三电平Buck变换器输出纹波电压畸变机理分析

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高电压技术 2024年第2期50卷 673-682页

作者：皇金锋曹哲王健张世欣韩梦祺陕西理工大学电气工程学院汉中723001 国家电投山东能源发展有限公司鲁西分公司济南250000

交错控制三电平Buck变换器受功率开关器件寄生参数的影响,输出电压纹波及电感电流纹波不仅发生了畸变,且纹波电压大小和忽略寄生参数的纹波电压存在较大误差。因此,深入分析了交错控制三电平Buck变换器输出纹波电压畸变机理,建立了考虑... 详细信息

交错控制三电平Buck变换器受功率开关器件寄生参数的影响,输出电压纹波及电感电流纹波不仅发生了畸变,且纹波电压大小和忽略寄生参数的纹波电压存在较大误差。因此,深入分析了交错控制三电平Buck变换器输出纹波电压畸变机理,建立了考虑功率开关器件寄生参数的电感电流纹波、输出纹波电压的数学模型。在此基础上进行了实验验证,实验结果表明,功率开关器件的寄生参数是导致输出纹波电压波形畸变以及与理想模型产生较大误差的主要原因,验证了理论分析的正确性。所得结论可为三电平Buck变换器的变换器参数设计提供理论指导。

关键词：三电平 Buck变换器纹波电压寄生参数畸变机理

The secondary laticifer differentiation in rubber tree is induced by trichostatin A, an inhibitor of histone acetylation

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Frontiers of Agricultural Science and Engineering 2016年第4期3卷 357-362页

作者： shixin zhang Shaohua WU Weimin TIAN Key Laboratory of Biology and Genetic Resources of Rubber Tree Ministry of Agriculture State Key Laboratory Incubation Base for Cultivation and Physiology of Tropical Crops Rubber Research InstituteChinese Academy of Tropical Agricultural Sciences

The secondary laticifer, a specific tissue in the secondary phloem of rubber tree, is differentiated from the vascular cambia. The number of the secondary laticifer in the trunk bark of rubber tree is positively correlated with rubber yield. Although jasmonates have been demonstrated to be crucial in the regulation of secondary laticifer differentiation, the mechanism for the jasmonate-induced secondary laticifer differentiation remains to be elucidated.By using an experimental morphological technique, the present study revealed that trichostatin A(TSA), an inhibitor of histone deacetylation, could induce the secondary laticifer differentiation in a concentrationdependent manner. The results suggest that histone acetylation is essential for the secondary laticifer differentiation in rubber tree.

关键词： Hevea brasiliensis histone acetylation laticifer differentiation trichostatin vascular cambia

基于Depth-wise卷积和视觉Transformer的图像分类模型

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计算机科学 2024年第2期51卷 196-204页

作者：张峰黄仕鑫花强董春茹河北大学数学与信息科学学院河北省机器学习与计算智能重点实验室河北保定071002

图像分类作为一种常见的视觉识别任务,有着广阔的应用场景。在处理图像分类问题时,传统的方法通常使用卷积神经网络,然而,卷积网络的感受野有限,难以建模图像的全局关系表示,导致分类精度低,难以处理复杂多样的图像数据。为了对全局关... 详细信息

图像分类作为一种常见的视觉识别任务,有着广阔的应用场景。在处理图像分类问题时,传统的方法通常使用卷积神经网络,然而,卷积网络的感受野有限,难以建模图像的全局关系表示,导致分类精度低,难以处理复杂多样的图像数据。为了对全局关系进行建模,一些研究者将Transformer应用于图像分类任务,但为了满足Transformer的序列化和并行化要求,需要将图像分割成大小相等、互不重叠的图像块,破坏了相邻图像数据块之间的局部信息。此外,由于Transformer具有较少的先验知识,模型往往需要在大规模数据集上进行预训练,因此计算复杂度较高。为了同时建模图像相邻块之间的局部信息并充分利用图像的全局信息,提出了一种基于Depth-wise卷积的视觉Transformer(Efficient Pyramid Vision Transformer,EPVT)模型。EPVT模型可以实现以较低的计算成本提取相邻图像块之间的局部和全局信息。EPVT模型主要包含3个关键组件:局部感知模块(Local Perceptron Module,LPM)、空间信息融合模块(Spatial Information Fusion,SIF)和“+卷积前馈神经网络(Convolution Feed-forward Network,CFFN)。LPM模块用于捕获图像的局部相关性;SIF模块用于融合相邻图像块之间的局部信息,并利用不同图像块之间的远距离依赖关系,提升模型的特征表达能力,使模型学习到输出特征在不同维度下的语义信息;CFFN模块用于编码位置信息和重塑张量。在图像分类数据集ImageNet-1K上,所提模型优于现有的同等规模的视觉Transformer分类模型,取得了82.6%的分类准确度,证明了该模型在大规模数据集上具有竞争力。

关键词：深度学习图像分类 Depth-wise卷积视觉Transformer 注意力机制

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双曲面弧形超高檐口高处作业阶梯式吊架技术

广东土木与建筑 2024年第3期31卷 97-100页

作者：张世鑫中铁建设集团南方工程有限公司广州514400

厦门某新建高铁站站房工程屋盖檐口为双曲面弧形结构,其复杂的檐口结构和独特的造型给现场施工带来了不少的高处作业风险。为确保高处作业时人员的安全,檐口施工采用了阶梯式吊架技术,该施工技术主要包括组装吊架平台、将吊架平台固定... 详细信息

厦门某新建高铁站站房工程屋盖檐口为双曲面弧形结构,其复杂的檐口结构和独特的造型给现场施工带来了不少的高处作业风险。为确保高处作业时人员的安全,檐口施工采用了阶梯式吊架技术,该施工技术主要包括组装吊架平台、将吊架平台固定于桁架上、搭设双排檐口防护架和搭设剪刀撑等工艺流程,具有施工速度快、节约成本等优点,施工技术还通过设置防滑措施、吊架增强稳定措施和荷载不均匀情况下的安全措施,为高空作业人员的生命安全提供有利保障。

关键词：檐口施工高处作业阶梯式吊架安全管理