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Intelligent In-Vehicle Safety System Based on Yolov5

Journal of Computer and Communications 2024年第3期12卷 207-218页

作者： Biyun Chen Wei Cai jinwen zhu College of Computer Information and Engineering Yancheng Teachers University Yancheng China

In order to reduce the occurrence of traffic accidents and assist drivers to avoid dangerous driving. This paper presents a smart in-vehicle safety system that utilises the Yolov5 algorithm. Yolov5 algorithm is used to anticipate driver fatigue and distraction behaviours, and remind drivers to pay attention to safe driving in time. The system continuously splits the frames and analyses the frame content through the video feedback from the front camera, compared to the traditional machine learning, Yolov5’s mosaic data is enhanced, resulting in a batch size enhancement of 92.3%, and it also uses the Drop Block mechanism to prevent overfitting. The hardware of this system uses STM32 microcontroller and uses system DMA interrupt control and buzzer alarm device to warn about dangerous driving behaviour.

关键词： Behaviour Detection STM32 Pyside2 Yolov5 Dlib Open Source Library Perclos Model

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草鱼MHCⅠα基因克隆及其多态性特征分析

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畜牧与兽医 2024年第7期56卷 6-14页

作者：戴薇汤井雪陈俊红朱瑾雯戴鼎震金陵科技学院动物科学与食品工程学院南京市动物生物技术创新实验室江苏南京210038

主要组织相容性复合体(MHC)是存在于脊椎动物染色体上、呈高度多态性的基因群,与机体的抗病性密切关系。MHCⅠ类分子由α链和β_(2m)微球蛋白组成,α链呈高度多态性。为探究草鱼MHCⅠα基因的多态性特征,本研究对3个草鱼个体的MHCⅠα... 详细信息

主要组织相容性复合体(MHC)是存在于脊椎动物染色体上、呈高度多态性的基因群,与机体的抗病性密切关系。MHCⅠ类分子由α链和β_(2m)微球蛋白组成,α链呈高度多态性。为探究草鱼MHCⅠα基因的多态性特征,本研究对3个草鱼个体的MHCⅠα基因进行克隆和测序,并使用生物信息学方法分析比较草鱼与小鼠、牛和鸡的MHCⅠα基因多态性特征。结果:共获得了5条草鱼MHCⅠα基因型序列,其基因编码332个氨基酸,包括信号肽、α1、α2、α3和TM/CY区域。草鱼MHCⅠα基因的氨基酸变异位点主要分布在α1和α2区域,与小鼠、牛和鸡MHCⅠα基因肽结合区(PBR)空间结构相似,多态性位点分布在抗原递呈的关键部位α螺旋或β折叠上。草鱼MHCⅠα基因的进化受自然环境的负向选择作用,而其他3个物种的进化方式均为正向选择。此外,草鱼MHCⅠα基因与其他脊椎动物亲缘关系较远,单独构成进化树上一大分支,且个体间继续分化为不同的亚支。本研究从基因层面阐述了草鱼MHCⅠα基因多态性特征和分子进化规律,为进一步探究低等脊椎动物MHCⅠα基因的生物学特征奠定基础。

关键词：草鱼 MHCⅠα基因多态性 α1和α2区域肽结合区

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大语言模型引导的文本摘要技术与系统

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计算机应用 2024年第S01期44卷 29-33页

作者：黄君豪朱锦文向宗元李萌坚毛瑞琛之江实验室杭州311121

在实际业务中时,常面临文本与它对应的其他模态在时间响应上难以同步的问题。例如,数字人实时手语表演无法与新闻口播同步播放。为了解决长度可控问题,提出一种基于大语言模型(LLM)的文本摘要解决方案,旨在保持原文语义不变的前提下将... 详细信息

在实际业务中时,常面临文本与它对应的其他模态在时间响应上难以同步的问题。例如,数字人实时手语表演无法与新闻口播同步播放。为了解决长度可控问题,提出一种基于大语言模型(LLM)的文本摘要解决方案,旨在保持原文语义不变的前提下将文本压缩至指定长度。首先通过模板调优和人工评估的方式,确定最适合长度可控文本摘要的LLM和模板;在此基础上,利用ChatGPT得到一定量优质的满足长度需求的文本摘要训练样本;其次,结合低秩自适应微调(LoRA)技术,利用生成的数据样本集对选定的大语言模型Baichuan-13B-Chat进行微调。在推理阶段,通过微调后的LLM生成多个结果和文本筛选模块打分,最终得到语义相对完整且长度满足要求的摘要文本。实验结果表明,所提方案在亚运手语新闻数据中指标显著提升,人工评估的平均满意度达到88.53%,整体压缩达标率达到73.7%,基本满足实际生产应用的需求。

关键词：文本摘要长度可控大语言模型低秩自适应微调模板调优文本筛选

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船舶舱室总体声学布局优化设计通用模型及解法

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中国造船 2014年第2期55卷 38-48页

作者：杨德庆朱金文上海交通大学船舶海洋与建筑工程学院上海200240

国际海事组织将于2014年采用新的更严格的船舶舱室噪声标准,在船舶总体设计阶段提前进行舱室总体声学布局优化设计是应对新标准的有效手段。船舶舱室总体声学布局优化设计问题研究的目的是如何根据舱室噪声限值指标,合理确定船舶各舱室... 详细信息

国际海事组织将于2014年采用新的更严格的船舶舱室噪声标准,在船舶总体设计阶段提前进行舱室总体声学布局优化设计是应对新标准的有效手段。船舶舱室总体声学布局优化设计问题研究的目的是如何根据舱室噪声限值指标,合理确定船舶各舱室类型的分布,使舱室声学降噪成本最低。本文通过将优化设计问题转化为指派问题(AP,Assignment Problem)描述,建立了定量化的舱室总体声学布局优化通用数学模型。给出了求解该模型的两种解法。解法一是针对指派问题的标准数学规划模型形式的匈牙利解法;解法二为基于该问题自身特殊性提出的求解该模型的准则法。通过实例,研究了不同约束条件下舱室总体声学布局的优化问题。结果表明,船舶舱室总体声学布局优化通用模型简单有效,两种解法计算结果相同,精度相当,可操作性强,效率高,且两种解法互为补充。

关键词：声学布局优化匈牙利算法声学准则法舱室声学布局优化

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Salicylic acid mediates oxidative injury and antioxidant enzymes in Oryza sativa japonica cultivars against quinclorac toxicity

Salicylic acid mediates oxidative injury and antioxidant enz...

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第十二届全国杂草科学大会

作者： Jian Wang Quyu Kong Chong Yang Rafaqat Ali Gill jinwen zhu Weijun Zhou College of Agriculture and Biotechnology Zhejiang University

The quinolinecarboxylic acid quinclorac is a new class of highly selective auxin herbicide and used by both,pre and post transplanting and direct-seeded *** the present study,different concentrations(0,0.1,0.25,1 g/L)of quinclorac were used in order to investigate the physio-chemical changes in two Oryza sativa japonica cultivars Zhejing 88 and Xiushui *** applied salicylic acid(SA)was pre-treated to regulate the oxidative damage caused by auxin *** showed that quinclorac induced a significant inhibition in growth parameters of two rice *** antioxidant enzymes activities in both cultivars were closely associated with quinclorac *** activities of POD,APX,SOD and GSTs were significantly increased,while CAT activity was reduced after quinclorac ***,GSH content was reduced and GSSG was increased in Zhejing 88but no significant change in Xiushui *** accumulation of MDA and ROS contents was elevated with the increasing concentrations of quinclorac as compared with untreated *** of SA significantly increased the plant biomass and the activity of antioxidant enzymes while reduced the MDA and ROS as compared to the quinclorac toxicity *** staining(NBT and DAB)and ultrastrucrural observations solidify our results that higher level of quinclorac(1g/L)significantly reduced the plant physio-chemical attributes as compared to control *** analyses verify that SA statistically alleviated the negative effects of quinclorac and also further improve the plant defense ***,according to these findings cultivar Xiushui 134 showed the higher tolerance to quinclorac than Zhejing 88 with respect to physio-histo-chemical parameters.

关键词： quinclorac salicylic acid rice antioxidant histochemical staining microscopic study

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Herbicides and salicylic acid alleviate root invasion into sunflower cumana Orobanche parasite

Herbicides and salicylic acid alleviate root invasion into s...

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第十二届全国杂草科学大会

作者： Luyang Hu Chong Yang Basharat Ali Jian Wang jinwen zhu Wenjian Song Weijun Zhou College of Agriculture and Biotechnology Zhejiang University

Sunflower broomrape(Orobanche cumana Wallr.)is an obligate nonparasitic weed that severely restricts the sunflower production *** the present study,an attempt was made to investigate the efficiency of different herbicides and salicylic acid(SA)to control the *** infection on sunflower *** were designed into two groups;In one group sunflower seeds were presoaked with SA in germination stage,in another group of soil in pot seeds were pretreated by three herbicides trifluralin,butralin and S-metolachlor,with three different concentrations(50%of recommended rate,recommended rate,and 200%)of recommended rate)respectively before *** three herbicides,trifluralin showed the best effect on sunflower followed by butralin and *** present study proposed that all these three herbicides could reduce broomrape infection into sunflower at early development stage and even have some influence at mature ***,results revealed that lower concentrations of trifluralin(50%and 100%)showed better effects than higher concentration(200%).Meanwhile,for butralin,200%concentration was the optimal *** effect of three gradients of S-metolachlor did not show significant *** plants soaked with SA showed enhanced growth,higher chlorophyll contents,efficient antioxidant defense system and less oxidative stress as compared to untreated SA *** study suggested that application of SA helped the sunflower seedlings to relieve the harm caused by *** *** research is planned to investigate the mechanism of these herbicides and SA on the ***-sunflower interaction.

关键词： Orobanche cumana Sunflower Herbicides Trifluralin Butralin S-Metolachlor Salicylic acid.

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