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融合前缀调优和提示学习的仇恨言论检测方法

计算机科学与探索 2025年第1期19卷 97-106页

作者：徐磊胡亚豪陈满陈军潘志松中国人民解放军陆军工程大学指挥控制工程学院南京210000

随着网络社交平台的发展,网络暴力的危害性日益凸显,其中仇恨言论作为网络暴力的一种表现形式,对其检测方法的研究有助于构建一个健康的互联网环境。然而,一方面先前的仇恨言论检测方法主要依赖于人工监管和关键词过滤,这些方法存在人... 详细信息

随着网络社交平台的发展,网络暴力的危害性日益凸显,其中仇恨言论作为网络暴力的一种表现形式,对其检测方法的研究有助于构建一个健康的互联网环境。然而,一方面先前的仇恨言论检测方法主要依赖于人工监管和关键词过滤,这些方法存在人工成本高且分类效果不佳的问题;另一方面,在互联网平台的监管下,仇恨言论的表达也变得更加含蓄、隐蔽,这对检测模型的文本理解能力提出了更高的要求。以ChatGPT为代表的大模型为仇恨言论检测任务提供了新的可能性,受其在各项下游任务中出色表现的启发,提出了一种融合前缀调优和提示学习的仇恨言论检测方法P-Prompt。利用前缀调优方法将大模型在相关数据集上进行微调,同时结合提示学习方法使模型能够识别并关注待检测文本中的仇恨言论词汇,从而进一步提升模型对仇恨言论的识别能力。实验结果验证了大模型在仇恨言论检测任务的有效性,与传统方法相比P-Prompt方法在仇恨言论检测的二分类和多分类任务中各项评价指标都取得了较明显的提升。

关键词：仇恨言论检测大语言模型前缀调优提示学习

Human-induced pluripotent stem cell-derived neural stem cell exosomes improve blood-brain barrier function after intracerebral hemorrhage by activating astrocytes via PI3k.Ak./MCP-1 axis

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Neural Regeneration Research 2025年第2期20卷 518-532页

作者： Conglin Wang Fangyuan Cheng Zhaoli Han Bo Yan pan Liao Zhenyu Yin Xintong Ge Dai Li Rongrong Zhong Qiang Liu Fanglian Chen Ping Lei Department of Geriatrics Tianjin Medical University General HospitalTianjinChina School of Medicine Nankai UniversityTianjinChina Tianjin Neurological Institute TianjinChina

Cerebral edema caused by blood-brain barrier injury after intracerebral hemorrhage is an important factor leading to poor ***-induced pluripotent stem cell-derived neural stem cell exosomes(hiPSC-NSC-Exos)have shown potential for brain injury repair in central nervous system *** this study,we explored the impact of hiPSC-NSC-Exos on blood-brain barrier preservation and the underlying *** results indicated that intranasal delivery of hiPSC-NSC-Exos mitigated neurological deficits,enhanced blood-brain barrier integrity,and reduced leuk.cyte infiltration in a mouse model of intracerebral ***,hiPSC-NSC-Exos decreased immune cell infiltration,activated astrocytes,and decreased the secretion of inflammatory cytok.nes lik. monocyte chemoattractant protein-1,macrophage inflammatory protein-1α,and tumor necrosis factor-αpost-intracerebral hemorrhage,thereby improving the inflammatory *** sequencing indicated that hiPSC-NSC-Exo activated the PI3k.Ak. signaling pathway in astrocytes and decreased monocyte chemoattractant protein-1 secretion,thereby improving blood-brain barrier *** with the PI3k.Ak. inhibitor LY294002 or the monocyte chemoattractant protein-1 neutralizing agent C1142 abolished these *** summary,our findings suggest that hiPSC-NSC-Exos maintains blood-brain barrier integrity,in part by downregulating monocyte chemoattractant protein-1 secretion through activation of the PI3k.Ak. signaling pathway in astrocytes.

关键词： Ak. astrocyte blood-brain barrier cerebral edema exosomes human-induced pluripotent stem cells intracerebral hemorrhage neural stem cells neuroinflammation PI3k

Modified optical remote sensing algorithms for the Pearl River Estuary

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Frontiers of Earth Science 2015年第4期9卷 732-741页

作者： man-Chung CHIM Jiayi pan Wenfeng LAI Institute of Space and Earth Information Science The Chinese University of Hong Kong Hong Kong SAR China

This study aims to develop new algorithms to retrieve sea surface parameters including concentrations of Chlorophyll a （Chl a） and Suspended Particulate Matter （SPM）, and absorbance of Colored Dissolved Organic Matter （aCDOM） by incorporating the contribution of red bands to mak. them more adaptable to case 2 waters. Optical remote sensing algorithms have demonstrated efficient retrieval of Chl a, SPM, and aCDOM, yet they are not very accurate especially for coastal areas. It has also been found that the default algorithm has overestimated Chl a in the Pearl River Estuary, and shown poor correlation for CDOM absorbance. By incorporating the red band ratios into the algorithm, a correction effect has been shown, which improves the accuracy of quantifying the actual concentration. Modeling and data fitting of the algorithm have been done based on 61 data samples collected in the Pearl River estuary during a cruise from 3 to 11 May 2014. The study also attempts to modify the aerosol correction bands used in SeaDAS to prevent saturation of these bands. The modified algorithms showed an R-Square value of 0.7289 for Chl a fitting, and 0.7338 for CDOM fitting, and corrected overestimation of Chl a concentration in the Pearl River estuary.

关键词： optical remote sensing algorithm Pearl River Estuary

Experimental Study of Wave Pressure on a Break.ater Pier

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China Ocean Engineering 1999年第2期14卷 209-216页

作者： pan, sh Xia, QY Lin, SQ Xu, LH Hohai Univ Coll Harbour Waterway & Coastal Engn Dept Coastal Engn Nanjing 210098 Peoples R China Fujian Prov Ports & shipping Adm Bur Fuzhou 350009 Peoples R China

Test studies on the wave pressure on a break.ater pier show that the influence of transmissive wave pressure on the outside wall of the break.ater pier is considerable, when the width of the pier is not very large. The variations of transmissive wave pressure on the break.ater pier with different widths are compared and the relationship is obtained between relative transmitting distance b/L and wave pressure reduction factor k. which may be used in the design of similar break.ater piers.

关键词： wave pressure break.ater pier

Formation control and collision avoidance for multi-UAV systems based on Voronoi partition

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Science China(Technological Sciences) 2020年第1期63卷 65-72页

作者： HU JinWen WANG man ZHAO ChunHui pan Quan DU Chang School of Automation Northwestern Polytechnical University

This paper deals with the formation control problem of multiple unmanned aerial vehicles(UAVs) with collision avoidance. A distributed formation control and collision avoidance method is proposed based on Voronoi partition and conventional artificial potential field. The collision avoidance is achieved by partitioning the whole space into non-overlapping regions based on Voronoi partition theory, which is tak.n as the task.region to confine the movement of each UAV. The general motion control law is designed based on the conventional artificial potential field. As this often leads to local optimum when two UAVs are going to collide with each other and they may stay still where the repulsive force is adversely equivalent to the attractive force. To address this problem,the destination switch scheme is further proposed to let UAVs switch destinations when they reach the local equilibrium. Finally,the effectiveness of proposed formation control algorithm is validated by simulations and experiments.

关键词： unmanned aerial vehicles formation control Voronoi partition artificial potential field

THE EFFECT OF W ON THE REPASSIVATION BEHAVIOR OF Ni-ADDED STAINLESS STEELS

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Acta Metallurgica Sinica(English Letters) 2005年第4期18卷 489-496页

作者： J.X. pan k. Y. k.m Jiuquan Iron ＆ Steel （Group） Co. Ltd Jiayuguan 735100 China Pohang University of Science and Technology Pohang 790-784 Korea

The effect of W on the repassivation behavior of Ni-added stainless steels was investigated with respect to the repassivation rate and the SCC susceptibility. It was found that more stable passive film was formed on the W-modified stainless steels than that of steels without W-modification, and the repassivation rate was faster for W-modified stainless steels in acidic chloride solution （0.5M H2SO4＋3.5% Cl^-）. In neutral chloride solution （1M MgCl2）, there were no significant differences on both passivation properties and the repassivation rates for duplex stainless steels, while W-modified austenite stainless steel showed faster repassivation rate. The SCC tests verified that W-modified Ni-added stainless steels exhibited better SCC resistance than steels without W in chloride solution. Moreover, W-modification in higher Ni-added stainless steels exhibited more remark.ble SCC resistance than steels with lower Ni content in chloride solution.

关键词： stainless steel repassivation stress corrosion crack.ng scratching electrode technique

Molecular Dynamics Simulation of Low-Energy C_(60) in Collision with a Graphite (0001) Surface

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Chinese Physics Letters 1995年第12期12卷 751-754页

作者： man Zhenyong pan Zhengying LIU Lei LI Rongwu Department of Physic 2 Fudan UniversityShanghai 200433 Ion Beam Laboratory Shanghai Institute of MetallurgyAcademia SinicaShanghai 200050 Department of Physics.Fudan University Shanghai 200433

The collision of C_(60) with a graphite(0001)surface has been investigated by molecular dynamics simulation with TLHL *** an impact energy of 90eV,the C_(60) buck.ball first deformed to a disc-lik. structure and then transformed back.to its original shape and recoiled *** dissociation of the C_(60) was observed on the time scale of the *** a single-atom-surface collision,the C_(60)-surface interaction is a highly inelastic process.

关键词： potential. process. collision

Heteroatom Doped Graphdiyne and Analogues:Synthesis,Structures and Applications

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Chemical Research in Chinese Universities 2021年第6期37卷 1213-1223页

作者： man Yixiao ZHAO Jinyu LIU shipeng pan Qingyan ZHAO Yingjie College of Polymer Science and Engineering Qingdao University of Science and TechnologyQingdao266042P.R.China

As a new carbon allotrope,graphdiyne(GDY)has shown intensive practical application prospects in the energy field,catalysis,gas separation,etc.,due to its unique 2Dπ-conjugated structure,rich sp-hybridized carbon atoms and semiconductor *** efforts have been made to the development of well-defined GDY materials in recent *** doping heteroatoms can further tune the structures,semiconductor properties of GDY,and expand the promising *** review summarized a comprehensive development of heteroatom doped GDYs,including their synthesis,structures,properties,applications in nanotechnology,as well as the forecast in the future.

关键词： Graphdiyne Carbon material 2D material Hetero-atom doping

Ensemble projections of climate and streamflow in a typical basin of semi-arid steppes in Mongolian Plateau of 2021-2100

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Advances in Climate Change Research 2024年第2期15卷 230-243页

作者： Hang pan Jian-Ping TANG Liang CHENG man-Chun LI Jiangsu Provincial k.y Laboratory of Geographic Information Science and Technology Nanjing UniversityNanjing 210023China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China k.y Laboratory of Mesoscale Severe Weather/Ministry of Education Nanjing UniversityNanjing 210023China School of Atmospheric Sciences Nanjing UniversityNanjing 210023China

The k.erlen River is the main water source for Hulun Lak.,the largest lak. in northern *** to reduced inflow from the k.erlen River,Hulun Lak. experienced rapid shrink.ge at the beginning of the 21st century,posing a serious threat to the ecological security of northern ***,there is still a significant lack.of projections regarding future climate change and its hydrological response in the k.erlen River *** study analyzed the projected climate and streamflow changes in the k.erlen River basin,a vital yet vulnerable international semi-arid steppes type basin.A combination of multi-model ensemble projection techniques,and the soil and water assessment tool(SWAT)model was employed to examine the spatio-temporal changes in precipitation,temperature,streamflow,and the associated uncertainties in the *** temperature(an increase of 1.84-6.42℃)and the precipitation(an increase of 15.0-46.0 mm)of k.erlen River basin are projected to increase by 2100,leading to a rise in streamflow(1.08-4.78 m^(3) s^(-1)).The upstream of the k.erlen River exhibits remark.ble increasing trends in precipitation,which has a dominant influence on streamflow of k.erlen *** increases in streamflow are observed in April,August,September,and October compared to the reference period(1971-2000).These findings suggest a partial alleviation of water scarcity in the k.erlen River,but also an increased lik.lihood of hydrological extreme *** projected temperature increase in the k.erlen River basin exhibits the smallest uncertainty,while more pronounced uncertainties are found in precipitation and *** spread among the results of CMIP6 models is greater than that of CMIP5 models,with lower signal-to-noise ratio(SNR)values for temperature,precipitation,and streamflow.

关键词： Climate change Flow projection Uncertainty SWAT Mongolian Plateau