检索结果-南通市图书馆

Optimizing Fine-Tuning in Quantized Language Models:An In-Depth Analysis of Key Variables

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 307-325页

作者： Ao Shen Zhiquan Lai Dongsheng Li xiaoyu Hu National Key Laboratory of Parallel and Distributed Computing National University of Defense TechnologyChangsha410073China Strategic Assessments and Consultation Institute Academy of Military ScienceBeijing100091China

Large-scale Language Models(LLMs)have achieved significant breakthroughs in Natural Language Processing(NLP),driven by the pre-training and fine-tuning *** this approach allows models to specialize in specific tasks with reduced training costs,the substantial memory requirements during fine-tuning present a barrier to broader ***-Efficient Fine-Tuning(PEFT)techniques,such as Low-Rank Adaptation(LoRA),and parameter quantization methods have emerged as solutions to address these challenges by optimizing memory usage and computational *** these,QLoRA,which combines PEFT and quantization,has demonstrated notable success in reducing memory footprints during fine-tuning,prompting the development of various QLoRA *** these advancements,the quantitative impact of key variables on the fine-tuning performance of quantized LLMs remains *** study presents a comprehensive analysis of these key variables,focusing on their influence across different layer types and depths within LLM *** investigation uncovers several critical findings:(1)Larger layers,such as MLP layers,can maintain performance despite reductions in adapter rank,while smaller layers,like self-attention layers,aremore sensitive to such changes;(2)The effectiveness of balancing factors depends more on specific values rather than layer type or depth;(3)In quantization-aware fine-tuning,larger layers can effectively utilize smaller adapters,whereas smaller layers struggle to do *** insights suggest that layer type is a more significant determinant of fine-tuning success than layer depth when optimizing quantized ***,for the same discount of trainable parameters,reducing the trainable parameters in a larger layer is more effective in preserving fine-tuning accuracy than in a smaller *** study provides valuable guidance for more efficient fine-tuning strategies and opens avenues for further research into optimizing LLM

关键词： Large-scale Language Model Parameter-Efficient Fine-Tuning parameter quantization key variable trainable parameters experimental analysis

Fluorinated poly(p-triphenylene isatin) anion exchange membranes based on hydrophilic hydroxyl side chain modulation for fuel cells

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 702-709页

作者： Yiman Gu Yanchao Zhang Zhanyu Li Yijia Lei Baozeng Sun xiaoyu Yu Zhe Wang College of Chemistry and Life Science Changchun University of Technology College of Chemical Engineering Changchun University of Technology School of Materials Science and Engineering Changchun University of Technology Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province

The development of alkaline fuel cells is moving forward at an accelerated pace,and the application of ether-free bonded polymers to anion exchange membranes （AEMs） has been widely ***,the question of the“trade-off”between AEM ionic conductivity and dimensional stability remains *** strategy of inducing microphase separation to improve the performance of AEM has attracted much attention recently,but the design of optimal molecular structures is still being ***,this work introduced different ratios of 3-bromo-1,1,1-trifluoroacetone （x=40,50,and 60） into the main chain of poly（p-terphenylene isatin）.Because fluorinated groups have excellent hydrophobicity,hydrophilic hydroxyl-containing side chains are introduced to jointly adjust the formation of phase separation *** results show that PTI-PTF50-NOH AEM with the appropriate fluorinated group ratio has the best ionic conductivity and alkali stability under the combined effect of *** has an ionic conductivity of 133.83 mS cm-1at 80°*** addition,the OH-conductivity remains at 89%of the initial value at 80°C and 3 M KOH for 1056 h of *** cell polarization curve based on PTI-PTF50-NOH shows a power density of 734.76 mW cm-2at a current density of 1807.7 mA cm-2.

关键词： Potassium hydroxide

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

温敏形状记忆堵漏材料实验研究

钻井液与完井液 2022年第5期39卷 545-549页

作者：冯杰臧晓宇邱正松暴丹郑力会中国石油大学(北京)石油工程学院北京102249 中国石油集团工程技术研究院有限公司北京102206 中国石油大学(华东)石油工程学院山东青岛266580

为改善桥接堵漏材料自适应性及封堵效率,提高复杂裂缝性地层堵漏作业的成功率,基于温敏型形状记忆材料,研制了一种具有热激活特性的形状记忆堵漏剂,经过粉碎、造粒得到不同粒径的形状记忆堵漏剂颗粒。室内评价实验表明,新研制的温敏形... 详细信息

为改善桥接堵漏材料自适应性及封堵效率,提高复杂裂缝性地层堵漏作业的成功率,基于温敏型形状记忆材料,研制了一种具有热激活特性的形状记忆堵漏剂,经过粉碎、造粒得到不同粒径的形状记忆堵漏剂颗粒。室内评价实验表明,新研制的温敏形状记忆堵漏剂具有良好的力学性能及形状记忆特性,堵漏剂颗粒高温激活后粒径增长率超过55%。裂缝封堵模拟实验表明,温度对温敏形状记忆堵漏剂的封堵效果具有显著影响,高温激活后封堵效果优于传统桥接堵漏材料。构建出一套具有较强自适应性的温敏形状记忆堵漏工作液配方,可成功封堵3~5 mm不同开度裂缝,具有高效自适应堵漏效果。

关键词：裂缝性漏失形状记忆材料温敏堵漏剂自适应堵漏工作液

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

基于受众理论的汉语线上学习情况调研分析

成才之路 2019年第32期 9-11页

作者：钱西雯臧晓雨南通大学文学院

在汉语国际教育领域,以多媒体技术和网络技术为核心的线上学习方式得到了极大的推广,对于所有把汉语作为第二语言的学习者而言,汉语学习网站和手机软件无疑是其最重要的汉语学习辅助工具,使用网站和手机软件进行汉语学习逐渐成为时代发... 详细信息

在汉语国际教育领域,以多媒体技术和网络技术为核心的线上学习方式得到了极大的推广,对于所有把汉语作为第二语言的学习者而言,汉语学习网站和手机软件无疑是其最重要的汉语学习辅助工具,使用网站和手机软件进行汉语学习逐渐成为时代发展的必然趋势。文章基于传播学的受众理论,以南通大学印度留学生为例,对其汉语线上学习情况进行调研和分析,并提出优化建议,以使汉语线上学习平台增强受众意识,选择更为有效的传播策略,多方面满足使用者的学习需求。

关键词：传播学受众理论受众汉语国际教育汉语线上学习

留学生汉语线上学习资源使用情况的调查研究——以南通大学印度留学生为例

在线全文

学校读者我要写书评

暂无评论

成才之路 2019年第33期 10-12页

作者：臧晓雨钱西雯南通大学文学院

信息技术的飞速发展,使得依托于新媒体手段的线上学习模式在汉语学习中显示出独特的优势。文章以南通大学印度留学生为研究对象,调查将汉语作为第二语言的学习者对现有汉语线上学习资源的使用情况,并结合相关理论分析当前汉语线上学习... 详细信息

信息技术的飞速发展,使得依托于新媒体手段的线上学习模式在汉语学习中显示出独特的优势。文章以南通大学印度留学生为研究对象,调查将汉语作为第二语言的学习者对现有汉语线上学习资源的使用情况,并结合相关理论分析当前汉语线上学习存在的问题,进而对汉语线上学习资源的优化提出建议。

关键词：留学生汉语学习线上学习资源新媒体学习模式

Lured by Tradition A famous Chinese vlogger is using social media to promote intangible cultural heritage

在线全文

学校读者我要写书评

暂无评论

ChinAfrica 2025年第1期17卷 56-58页

作者： LI xiaoyu 不详

In the digital age,where traditional culture is in danger of gradually disappearing,one iconic figure has taken it upon herself to reverse the trend by reviving traditional skills.A prominent Chinese vlogger,Li Ziqi,whose birth name is Li Jiajia,has amassed a vast online following by reinterpreting traditions that date back thousands of *** a threeyear absence from social media,she made a highly anticipated return with the release of three new videos in mid-November *** videos represent the culmination of several months of behind-the-scenes work.

关键词： media return interpreting

Protein arginine methyltransferase-6 regulates heterogeneous nuclear ribonucleoprotein-F expression and is a potential target for the treatment of neuropathic pain

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第9期20卷 2682-2696页

作者： xiaoyu Zhang Yuqi Liu Fangxia Xu Chengcheng Zhou Kaimei Lu Bin Fang Lijuan Wang Lina Huang Zifeng Xu Department of Anesthesiology International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Anesthesiology Shanghai General HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Shanghai Key Laboratory of Embryo Original Diseases ShanghaiChina

Protein arginine methyltransferase-6 participates in a range of biological functions,particularly RNA processing,transcription,chromatin remodeling,and endosomal ***,it remains unclear whether protein arginine methyl transferase-6 modifies neuropathic pain and,if so,what the mechanisms of this *** this study,protein arginine methyltransferase-6 expression levels and its effect on neuropathic pain were investigated in the spared nerve injury model,chronic constriction injury model and bone cancer pain model,using immunohistochemistry,western blotting,immunoprecipitation,and label-free proteomic *** results showed that protein arginine methyltransferase-6 mostly co-localized withβ-tubulinⅢin the dorsal root ganglion,and that its expression decreased following spared nerve injury,chronic constriction injury and bone cancer *** addition,PRMT6 knockout(Prmt6~(-/-))mice exhibited pain ***,the development of spared nerve injury-induced hypersensitivity to mechanical pain was attenuated by blocking the decrease in protein arginine methyltransferase-6 ***,when protein arginine methyltransferase-6 expression was downregulated in the dorsal root ganglion in mice without spared nerve injury,increased levels of phosphorylated extracellular signal-regulated kinases were observed in the ipsilateral dorsal horn,and the response to mechanical stimuli was ***,protein arginine methyltransferase-6 appeared to contribute to spared nerve injury-induced neuropathic pain by regulating the expression of heterogeneous nuclear ***,protein arginine methyltransfe rase-6-mediated modulation of hete rogeneous nuclear ribonucleoprotein-F expression required amino atids 319 to 388,but not classical H3R2 *** findings indicated that protein arginine methyltransferase-6 is a potential therapeutic target fo r the treatment of peripheral neuro pathic pain.

关键词： dorsal root ganglion heterogeneous nuclear ribonucleoprotein F neuropathic pain protein arginine methyltransferase-6 sensory neurons

Photoinduced radical sulfur dioxide insertion with asymmetric cyclization of alkenes: accessing β-chiral sulfones bearing S-stereocentric cyclic sulfinamides

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第01期 257-263页

作者： Jiapian Huang Chenxin Wang Xu Wang xiaoyu Zhou Wei Xiao Jie Wu School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies Taizhou University State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences School of Chemistry and Chemical Engineering Henan Normal University

The generation of various β-chiral sulfones bearing chiral cyclic sulfinamides through photoredox-catalyzed sulfur dioxide insertion with asymmetric radical cyclization is described. This method features a broad substrate scope and excellent stereospecificity. Computational studies reveal that the dispersion interaction between sulfinyl group and CH2SO2Ph group plays a crucial role in the stereoselectivity control.

关键词：

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

新型延迟膨胀堵漏剂特性实验研究

钻井液与完井液 2020年第5期37卷 602-607页

作者：臧晓宇邱正松暴丹苗海龙钟汉毅赵欣张现斌陈安亮中国石油大学(华东)石油工程学院山东青岛266580 中海油田服务股份有限公司油田化学事业部河北三河065201 中国石油集团渤海钻探工程有限公司天津300280

裂缝性地层严重井漏难题严重制约复杂地质条件油气高效钻探开发。目前常用桥接堵漏材料可变形性较差,而常见吸水树脂类堵漏材料的膨胀速度过快,导致上述堵漏材料难以在漏失通道中形成致密承压封堵层。为此,研制了一种新型延迟膨胀堵漏剂... 详细信息

裂缝性地层严重井漏难题严重制约复杂地质条件油气高效钻探开发。目前常用桥接堵漏材料可变形性较差,而常见吸水树脂类堵漏材料的膨胀速度过快,导致上述堵漏材料难以在漏失通道中形成致密承压封堵层。为此,研制了一种新型延迟膨胀堵漏剂SDSAP,密度为1.52 g/cm^3,粒径为0.425~3.35 mm,可根据漏失情况进行调节;具有良好的吸水膨胀性能以及抗压性能、抗盐性能;吸水膨胀后具有可变形性,适用漏失通道尺寸范围较宽;具有适度延迟膨胀效应,常温下膨胀速率较低;同时具有一定温度响应特性,在地层高温刺激下可快速膨胀,有利于降低封堵层形成时间,减少漏失量。基于延迟膨胀堵漏剂SDSAP,协同复配刚性、弹性及纤维等类型堵漏材料,实验优化得到了适用1~3 mm开度裂缝的致密承压堵漏工作液体系配方,承压能力达7 MPa以上,且漏失量较低,可用于较好解决复杂裂缝性地层井漏问题。

关键词：井漏裂缝性漏失堵漏剂延迟膨胀承压能力