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Chinese Journal of Chemistry 2024年第16期42卷 1860-1866页

作者： zhihao guo Guixia Liu Zheng Huang Chang-Kung Chuang Institute East China Normal UniversityShanghai 200062China The State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChineseAcademyof SciencesShanghai200032China School of Chemistry and Materials Science Hangzhou Institute of Advanced StudyUniversity of Chinese Academy of SciencesHangzhouZhejiang310024China

By rational modification of electronic and steric properties of pincer ligands,a Co/Fe dual catalyst system is developed for one-pot sequential Markovnikov alkyne hydrosilylation and stereoselective alkene *** protocol provides an atom-economical and efficient approach to trisubstituted(E)-alkenyl silanes from widely accessible terminal alkynes with high regio-and stereoselectivities under mild *** utility of this reaction was demonstrated by gram-scale synthesis and derivatization of bioactive *** radical clock and trapping experiments indicated that radical pathway might be operative in the alkene isomerization step.

关键词： Cobalt Dual catalysis Hydrosilylation Iron Isomerization Trisubstituted alkenyl silanes

Utilizing N-hydroxy-9-octadecenamide as a collector in flotation separation of bastnaesite and fluorite

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Journal of Rare Earths 2024年第8期42卷 1620-1628,I0008页

作者： zhihao guo Sultan Ahmed Khoso Mengjie Tian Wei Sun School of Minerals Processing and Bioengineering Central South UniversityChangsha410083China State Key Laboratory of Mineral Processing Beijing102600China Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources Wuhan430081China Key Laboratoryof Hunan Province for Cleanand Efficient Utilization of Strategic Calcium-containing Mineral Resources Central South UniversityChangsha410083China Department of Mining Engineering Mehran University of Engineering&TechnologyJamshoro76062Pakistan

Bastnaesite((Ce,La,Pr,Nd)CO_(3)F) is a significant light rare earth mineral found in nature,known for its fine-grained *** is commonly employed for the recovery of fine-grained bastnaesite *** serve as an essential flotation reagent that enhance the surface hydrophobicity of target minerals.A novel collector,N-hydroxy-9-octadecenamide(N-OH-9-ODA),was synthesised in this study.N-OH-9-ODA exhibits superior selectivity compared to the traditional collector oleic acid in the flotation separation of bastnaesite and *** experimental and co mputational results indicate that N-OH-9-ODA exhibits superior selectivity due to its higher adsorption affinity for bastnaesite surface compared to fluorite *** zeta potential and the binding energies of the Ce 3d peaks in the X-ray photoelectron spectrum(XPS) of bastnaesite surface exhibit significant ***,fluorite surface demonstrates minimal alterations in its zeta potential and the binding energies of the Ca 2p peaks in its XPS after its interaction with N-OH-9-ODA.

关键词： Bastnaesite Collector Hydroxamic acids N-hydroxy-9-octadecenamide Oleic acid Rare earths

A lightweight semantic segmentation algorithm integrating CA and ECA-Net modules

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Optoelectronics Letters 2024年第9期20卷 568-576页

作者： guo zhihao MA Dongmei LUO Xiaoyun School of Physics and Electronic Engineering Northwest Normal UniversityLanzhou 730070China

Aiming at the existing semantic segmentation process due to the loss of pixel features and the complexity of calculating too many parameters,which leads to unsatisfactory segmentation results and too long time,this paper proposes a lightweight semantic segmentation algorithm based on the fusion of multiple *** algorithm is based on the pyramid scene parsing network(PSPNet).Firstly,Mobile Net V2 network is chosen as the feature extraction network to construct the lightweight network structure.

关键词： Net network algorithm

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Hollow ZIF-67-derived Co@N-doped carbon nanotubes boosting the hydrogenation of phenolic compounds to alcohols

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Chinese Journal of Chemical Engineering 2024年第2期66卷 157-166页

作者： zhihao guo Jiuxuan Zhang Lanlan Chen Chaoqun Fan Hong Jiang Rizhi Chen State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech UniversityNanjing 211816China

The selective hydrogenation of highly toxic phenolic compounds to generate alcohols with thermal stability,environmental friendliness,and non-toxicity is of great ***,a series of Co-based catalysts,named Co@NCNTs,were designed and constructed by direct pyrolysis of hollow ZIF-67(HZIF-67)under H_(2)/Ar *** evolution of the catalyst surface from the shell layer assembled by ZIF-67-derived particles to the in situ-grown hollow nitrogen-doped carbon nanotubes(NCNTs)with certain length and density is achieved by adjusting the pyrolysis atmosphere and *** to the synergistic effects of in situ-formed hollow NCNTs,well-dispersed Co nanoparticles,and intact carbon matrix,the as-prepared Co@NCNTs-0.10-450 catalyst exhibits superior catalytic performance in the hydrogenation of phenolic compounds to *** turnover frequency value of Co@NCNTs-0.10-450is 3.52 h^(-1),5.9 times higher than that of Co@NCNTs-0.40-450 and 4.5 times higher than that of Co@NCNTs-0.10-550,exceeding most previously reported non-noble metal *** findings provide new insights into the development of non-precious metal,efficient,and cost-effective metal-organic framework-derived catalysts for the hydrogenation of phenolic compounds to alcohols.

关键词： Phenolic compounds Hollow ZIF-67 pyrolysis Nitrogen-doped carbon nanotubes Reduction Multiphase reaction Catalysis

Therapeutic sponge prevents postoperative breast cancer recurrence by sustainably dissociating into CD44-targeted nanoplatform

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Nano Research 2024年第3期17卷 1792-1803页

作者： Junhui Sui Mingda Zhao zhihao guo Jiafeng Li Jie Chen Hongli Chen Jie Liang Yong Sun Xingdong Zhang Yujiang Fan National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610064China Beijing Tide Pharmaceutical Co. Ltd.Beijing 100176China The Key Laboratory of Biomedical Material School of Life Science and TechnologyXinxiang Medical UniversityXinxiang 453003China Coal Mining Branch China Coal Research InstituteBeijing 100028China School of Ophthalmology&Optometry Eye HospitalWenzhou Medical UniversityWenzhou 325027China

Locoregional recurrence and distant metastasis of breast cancer still pose a significant risk for patients’*** address the clinical challenge,functional absorbable sponges(HA-SH/PP-Dox/Lap/COL I(HCNPs))were constructed by biomimetic extracellular matrix of collagen I/hyaluronic acid complex conjugated with doxorubicin/lapatinib(Dox/Lap)-loaded *** HCNPs sponge exhibited excellent clotting ability and blood absorption ***,Dox/Lap-loaded nanoparticles were synchronously endowed with a large number of oligo hyaluronic acid segments after degradation,which thus enhanced the ability of targeting into CD44-overexpressed tumor *** implantable HCNPs sponge in resected cavity of postoperative 4T1 models inhibited the spread of scattered tumor cells by absorbing the inevitable *** importantly,CD44 targeted nanoparticle with suitable Dox/Lap proportion continuously released from sponge to kill tumor cells of surrounding HCNPs and those remaining at surgical margin,thus prevented local recurrence as well as distant ***,the functional HCNPs sponge might provide a safer and more effective strategy for postoperative treatment of cancer.

关键词： therapeutic sponge scattered tumor cells recurrence and metastasis CD44-targeted nanoparticles breast cancer

改进YOLOv5s-Seg的高效实时实例分割模型

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计算机工程与应用 2024年第16期60卷 258-268页

作者：马冬梅郭智浩罗晓芸西北师范大学物理与电子工程学院兰州730070 甘肃省智能信息技术与应用工程研究中心兰州730070

实例分割是图像分割的重要组成部分,同时也是计算机视觉领域的一个重要课题。然而现有实例分割模型不能在保证实时性的同时保证模型分割精度,因此在实时实例分割任务中一直存在精度过低、定位不精确的问题。针对此问题,提出了一种基于YO... 详细信息

实例分割是图像分割的重要组成部分,同时也是计算机视觉领域的一个重要课题。然而现有实例分割模型不能在保证实时性的同时保证模型分割精度,因此在实时实例分割任务中一直存在精度过低、定位不精确的问题。针对此问题,提出了一种基于YOLOv5s-Seg改进的实时实例分割模型。以YOLOv5s-Seg作为网络的基础模型,主干网络选用Repvit m3网络,然后改进FPN结构,在FPN结构中将原始得到的C3卷积模块升级为RsRepVitBlock模块,并在其内部使用ECA注意力机制,最后采用SIoU作为模型的边界框损失函数。该算法在公开数据集PASCAL VOC 2012上的实验结果显示,改进后的模型分割精度mAP达到了65.7%,较原模型YOLOv5s-Seg提高了10.6个百分点。该模型大幅提升了分割精度,并且有效地改善了分割任务中定位不准确的问题。相较于其他模型,具有显著的精度优势和更好的模型稳定性。

关键词：实时实例分割 YOLOv5s-Seg Repvit m3 RsRepVitBlock 高效通道注意力机制(ECA) SIoU

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论虚拟货币的双重法律属性

河南社会科学 2024年第3期32卷 78-86页

作者：郭志浩候柔倩西北政法大学国家安全学院陕西西安710122 中南大学法学院湖南长沙410083

虚拟货币是一种通过数字技术创建、存储和传输的具有类货币属性的虚拟财产,因其独有的去中心化技术而不受中央银行发行和控制,可以在全球范围内自由流通,免受政治因素和国际汇率等影响。不同于传统货币,虚拟货币具有匿名性、自主性、可... 详细信息

虚拟货币是一种通过数字技术创建、存储和传输的具有类货币属性的虚拟财产,因其独有的去中心化技术而不受中央银行发行和控制,可以在全球范围内自由流通,免受政治因素和国际汇率等影响。不同于传统货币,虚拟货币具有匿名性、自主性、可分割性、不可篡改性等特征,使得各国对虚拟货币法律属性的认定不尽相同。时下,虚拟货币的法律属性在我国监管政策和司法实践中均存有分歧,致使数字经济向前发展的同时,相应的法律规制却无法同步。通行的“货币说”“虚拟财产说”“证券说”等观点,都离不开精准监管的内核。故此,区分我国不同类型的数字资产,按其特定属性实施双轨制的法律属性判定,有利于实现更高效的资源配置,有助于对违法行为进行科学打击,有益于虚拟货币行业的持续健康发展。

关键词：虚拟货币数字资产法律属性精准监管

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融合位置注意力的无人机影像多目标检测方法

工程勘察 2024年第3期52卷 61-67页

作者：郭志浩甘肃铁道综合工程勘察院有限公司兰州730015

无人机能够在城市规划、侦察、监视等场景下,通过目标检测技术提供准确的目标位置和类别信息,为后台处理提供详细的信息,但现有方法在无人机影像检测时存在场景泛化能力不足、小目标漏检率高等问题。鉴于此,提出一种基于回归的检测方法... 详细信息

无人机能够在城市规划、侦察、监视等场景下,通过目标检测技术提供准确的目标位置和类别信息,为后台处理提供详细的信息,但现有方法在无人机影像检测时存在场景泛化能力不足、小目标漏检率高等问题。鉴于此,提出一种基于回归的检测方法,在骨干网络中使用位置注意力机制为正负样本特征赋权,提高模型对正样本的学习能力;构建四个输出尺度的特征图融合金字塔,并采用改进的非极大值抑制算法精准筛选最终的输出检测框。为降低正负样本不均衡带来的影像,一方面采用交叉熵损失函数,另一方面对训练数据集进行样本增强处理。实验结果表明,所提出模型在测试数据集上的检测精度明显优于对比模型,并且在不同场景下表现出良好的泛化能力,其测试速度可达到实时检测的水平。

关键词：无人机影像多目标检测位置注意力非极大值抑制数据增强

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面向城市复杂场景的多尺度监督融合变化检测

遥感信息 2024年第4期39卷 23-32页

作者：潘建平谢鹏郭志豪林娜张慧娟重庆交通大学智慧城市学院重庆400074 宁夏回族自治区遥感调查院银川750021

城市复杂场景中,地物形状多样,光照和成像角度变化大会导致变化检测结果受到干扰。为解决这些问题,文章提出了一种双上下文多尺度监督融合的网络模型(dual context multi-scale supervised fusion network model,DCMSFNet)。首先,在编... 详细信息

城市复杂场景中,地物形状多样,光照和成像角度变化大会导致变化检测结果受到干扰。为解决这些问题,文章提出了一种双上下文多尺度监督融合的网络模型(dual context multi-scale supervised fusion network model,DCMSFNet)。首先,在编码部分使用双上下文增强模块获得地物丰富的全局上下文信息。在解码部分,采用级联的方法组合特征,然后通过自适应注意力模块捕捉不同尺度的变化关系,设计多尺度监督融合模块,增强深度网络融合,获得具有更高辨别能力的变化区域特征,将不同层级的输出结果与主网络的重构变化图融合形成最终的变化检测结果。该模型在LEVIR-CD和SYSU-CD变化检测数据集取得了较好的结果,F1-score分别提高了1.58%和2.17%,可更加精确识别复杂场景的变化区域,进一步减少无关因素引起的误检和漏检,且对目标地物边缘的检测更加平滑。

关键词：深度学习变化检测双上下文增强自适应注意力模块多尺度监督融合

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脾肾气虚型慢性肾脏病临床经验总结

中医临床研究 2024年第6期16卷 39-42页

作者：郭志豪黄新艳湖南中医药大学湖南长沙410036 湖南中医药大学附属衡阳医院湖南衡阳421009

慢性肾脏病(Chronic Kidney Disease,CKD)是由各种原因引起的肾脏结构或功能异常不短于3个月的疾病。近年来CKD的发病率、住院率呈逐渐上升趋势。黄新艳主任,国家重点学科带头人,从事中医临床工作数十年,对CKD的中医病机及辨证施治有独... 详细信息

慢性肾脏病(Chronic Kidney Disease,CKD)是由各种原因引起的肾脏结构或功能异常不短于3个月的疾病。近年来CKD的发病率、住院率呈逐渐上升趋势。黄新艳主任,国家重点学科带头人,从事中医临床工作数十年,对CKD的中医病机及辨证施治有独特见解和丰富的临床经验。黄主任认为CKD的中医病机总属本虚标实,临床上多见脾肾气虚型,兼有湿热、浊毒、瘀血、风邪为标。治疗上,黄主任以顾护脾肾为出发点,在主方中运用补益之品以使正气渐复,祛邪外出;并根据患者标实之不同,予以清利湿热、解毒化浊、活血祛瘀、疏风散邪之法。同时患者病有轻重缓急,用药时应遵循“急则治其标,缓则治其本”的原则,勿令失治误治。除此之外,黄主任还强调,治疗CKD可适当配伍虫类药益肾固本,尤其对减少患者尿蛋白水平有较好疗效。中医外治疗法上,可选用中药保留灌肠、结肠透析疗法降低肾损害,亦可选用中药药浴、腧穴疗法等联合治疗,以增疗效。在临床诊疗过程中,CKD患者往往合并他病,如不寐、痉病、淋证等,影响治疗,因此对合并症的防治不可忽视,以期达到最佳治疗效果。笔者在跟随黄主任诊疗过程中总结了黄师治疗脾肾气虚型CKD的相关临床经验,以供参考。

关键词：慢性肾脏病脾肾气虚本虚标实虫类药外治法