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在羞耻与渴望之间——后殖民精神分析视野下的《沉沦》
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作者 陈义望 《现代中文学刊》 CSSCI 北大核心 2024年第3期84-90,共7页
郁达夫的《沉沦》是一部描绘民国初期中国青年在日本留学期间内心困境和文化冲突的经典作品。本文以弗朗茨·法农的精神分析理论为框架,深入探讨了主人公面对多重文化背景时的心理压抑、自卑感和民族悲哀。从传统精神分析对《沉沦... 郁达夫的《沉沦》是一部描绘民国初期中国青年在日本留学期间内心困境和文化冲突的经典作品。本文以弗朗茨·法农的精神分析理论为框架,深入探讨了主人公面对多重文化背景时的心理压抑、自卑感和民族悲哀。从传统精神分析对《沉沦》解读的局限性入手,指出传统理论未能充分考虑到社会与政治背景对主人公心理状态的深刻影响。通过法农的后殖民精神分析理论,为《沉沦》的多重心理冲突和行为动机提供了一个全面而深刻的解释框架,丰富了对这部经典作品的理解。 展开更多
关键词 郁达夫 《沉沦》 法农 后殖民精神分析 心理压抑 身份认同危机
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一种辐射量线性可调红外源设计 被引量:1
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作者 倪家正 陈亦望 程玉宝 《红外技术》 CSCD 北大核心 2017年第7期605-609,共5页
针对红外辐射源辐射控制问题,设计了一种均匀可调红外辐射源方案。分析了抛物柱面镜的光学特性,给出了抛物柱面镜反射后的辐射模型,并仿真模拟了抛物柱面镜的准直效果,证明了抛物柱面镜具有很好的会聚作用;对比了百叶窗和双向推拉窗的... 针对红外辐射源辐射控制问题,设计了一种均匀可调红外辐射源方案。分析了抛物柱面镜的光学特性,给出了抛物柱面镜反射后的辐射模型,并仿真模拟了抛物柱面镜的准直效果,证明了抛物柱面镜具有很好的会聚作用;对比了百叶窗和双向推拉窗的辐射调节效果,推导了双向推拉窗透光面积的变化模型,得到了推拉窗开口宽度与辐射功率之间的线性关系;基于以上研究,设计了均匀可调红外辐射源原理样机,并进行了验证实验,结果证明通过控制推拉窗开口宽度,能够较好的实现对辐射量的均匀控制。 展开更多
关键词 红外辐射源 均匀可调 抛物柱面镜 双向推拉窗
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局部点蚀损伤下H型钢柱承载能力研究 被引量:1
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作者 杨明飞 王辛 +2 位作者 陈宜网 沙志平 朱克川 《防灾减灾工程学报》 CSCD 北大核心 2021年第5期1020-1027,共8页
为了研究局部点蚀损伤对H型钢柱承载能力的影响,建立数值模型并理论验证了其合理性。以实际结构中损伤位置为参考,分别在柱脚和柱中位置的翼缘和腹板上布置不同腐蚀程度的点蚀坑,并对各组模型进行特征值屈曲分析和非线性屈曲分析,得到... 为了研究局部点蚀损伤对H型钢柱承载能力的影响,建立数值模型并理论验证了其合理性。以实际结构中损伤位置为参考,分别在柱脚和柱中位置的翼缘和腹板上布置不同腐蚀程度的点蚀坑,并对各组模型进行特征值屈曲分析和非线性屈曲分析,得到其屈曲模态和极限承载能力。研究结果表明:不同分布位置、不同腐蚀程度下的H型钢柱屈曲模态并未发生明显改变,均表现为在弱轴平面的弯曲失稳;极限承载力折减系数(r)与壁厚损伤度(α)近似呈现线性关系,与点蚀损伤强度(DOP)之间的关系可用二次多项式较为准确的描述,且随着α和DOP增长,r的降低速度有逐渐加快趋势;局部点蚀范围越靠近柱中,H型钢柱承载力损失越多,故柱中为局部点蚀敏感区;用失重率(D_(w))可较好的综合考虑α和DOP对钢柱承载能力的影响,r和D_(w)在各工况下均表现出较好的近似线性关系,在实际工程中,可用失重率对局部点蚀损伤下H型钢柱进行安全性评级。 展开更多
关键词 H型钢柱 局部点蚀损伤 极限承载能力 特征值屈曲分析 非线性屈曲分析 点蚀损伤强度
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局部腐蚀损伤下钢结构整体抗震性能研究 被引量:2
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作者 杨明飞 沙志平 +2 位作者 陈宜网 王辛 王磊 《黄山学院学报》 2020年第5期74-77,共4页
为研究局部腐蚀损伤对钢结构整体抗震性能的影响,以某多层钢框架结构为例,利用ANSYS有限元软件建立了带有局部腐蚀构件的结构数值模型,静力计算和模态分析结果表明失重率在20%以内时,钢框架结构的最大应力和模态频率变化不大,但在有局... 为研究局部腐蚀损伤对钢结构整体抗震性能的影响,以某多层钢框架结构为例,利用ANSYS有限元软件建立了带有局部腐蚀构件的结构数值模型,静力计算和模态分析结果表明失重率在20%以内时,钢框架结构的最大应力和模态频率变化不大,但在有局部腐蚀损伤结构中的局部位置,尤其是与局部腐蚀构件连接的节点处,应力明显增加,达到21.6%。动力分析结果显示存在局部腐蚀作用下的钢框架结构,随着失重率的增加,结构整体刚度降低明显,失重率20%腐蚀损伤结构上最大应力相应增加22.2%。 展开更多
关键词 局部腐蚀 钢结构 抗震性能 失重率 模态分析 动力分析
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基于机器学习的降雨量雷达回波数据建模与预测 被引量:5
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作者 陈晓平 陈易旺 施建华 《南京信息工程大学学报(自然科学版)》 CAS 2020年第4期483-494,共12页
以浙江省2016年1-10月的雷达回波强度数据为基础,分别应用随机森林模型、BP神经网络模型、卷积神经网络模型来预测降雨量并进行对比.建模分析结果表明,随机森林模型预测效果精确度较低,容易低估较大的降雨强度,而BP神经网络和卷积神经... 以浙江省2016年1-10月的雷达回波强度数据为基础,分别应用随机森林模型、BP神经网络模型、卷积神经网络模型来预测降雨量并进行对比.建模分析结果表明,随机森林模型预测效果精确度较低,容易低估较大的降雨强度,而BP神经网络和卷积神经网络预测的效果都比随机森林好,特别是卷积神经网络,其预测值与真实值更加接近,且对较大的降雨强度拟合较好. 展开更多
关键词 降雨量 BP神经网络 卷积神经网络 随机森林
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青年科研能力培养与成才之路
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作者 陈义旺 《今日科苑》 2022年第9期25-25,共1页
自党的十八大以来,习近平总书记多次强调科技创新的重要性,参观“十三五”科技创新成就展时强调提出加快实现高水平科技自立自强、2021年中央人才工作会议提出加快建设世界重要人才中心和创新高地。1.深刻理解科技创新重要论述从马克思... 自党的十八大以来,习近平总书记多次强调科技创新的重要性,参观“十三五”科技创新成就展时强调提出加快实现高水平科技自立自强、2021年中央人才工作会议提出加快建设世界重要人才中心和创新高地。1.深刻理解科技创新重要论述从马克思主义中国化的“理论逻辑”看,“科学技术是生产力”是马克思主义的基本原理,习近平总书记提出的“四个面向”是马克思主义中国化的重大飞跃。从国家兴衰的“历史逻辑”看,科技始终是推动国家、民族、整个人类社会向前发展的重要力量,科技革命与国家兴衰密切相关. 展开更多
关键词 党的十八大以来 科研能力培养 马克思主义中国化 成才之路 国家兴衰 自立自强 成就展 理论逻辑
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Mechanical and thermal properties of polypeptide modified hydroxyapatite/poly(L-lactide) nanocomposites 被引量:3
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作者 WEI JunChao DAI YanFeng +1 位作者 chen yiwang chen XueSi 《Science China Chemistry》 SCIE EI CAS 2011年第3期431-437,共7页
A new type of polypeptide(poly(-benzyl-L-glutamate)(PBLG))modified hydroxyapatite(HA)/poly(L-lactide)(PLLA)nanocomposites(PBLG-g-HA/PLLA)were prepared by the solvent-mixing method,and their mechanical and thermal prop... A new type of polypeptide(poly(-benzyl-L-glutamate)(PBLG))modified hydroxyapatite(HA)/poly(L-lactide)(PLLA)nanocomposites(PBLG-g-HA/PLLA)were prepared by the solvent-mixing method,and their mechanical and thermal properties were investigated.The tensile test showed that the mechanical properties of PBLG-g-HA/PLLA nanocomposites were better than that of PLLA,even a 0.3 wt%content of PBLG-g-HA in the nanocomposites could make the tensile strength 12%higher than that of the neat PLLA sample,and the tensile modulus was about 17%higher than that of the PLLA sample.The thermal gravimetric analysis(TGA)showed that the PBLG-g-HA/PLLA composites have better thermal stability than the PLLA sample.The differential scanning calorimetry(DSC)was used to characterize the effect of PBLG-g-HA on the crystallization of PLLA.The isothermal crystallization behavior showed that the half crystallization time(t1/2)of PBLG-g-HA/PLLA was much shorter than that of the PLLA sample.When the PBLG-g-HA content was 10%,t1/2 was only 18.7 min,while t1/2 of the PLLA sample was 61.4 min.The results showed that the PBLG-g-HA worked as a nucleating agent and enhanced the crystallization speed of PLLA. 展开更多
关键词 HYDROXYAPATITE poly(L-lactide) NANOCOMPOSITE surface modification
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Disulfide-crosslinked Poly(L-glutamic acid) Grafted Mesoporous Silica Nanoparticles and Their Potential Application in Drug Delivery 被引量:2
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作者 WU Huiyong LI Jianhui +4 位作者 WEI Junchao DAI Yanfeng PENG Zhiping chen yiwang LIU Tianxi 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2015年第5期890-894,共5页
Poly(L-glutamic acid)(PLGA) was grafted onto the surface of mesoporous silica nanoparticles(MSN) via the ring opening polymerization of γ-benzyl-L-glutamate N-carboxyanhydride(BLG-NCA) and its subsequent depr... Poly(L-glutamic acid)(PLGA) was grafted onto the surface of mesoporous silica nanoparticles(MSN) via the ring opening polymerization of γ-benzyl-L-glutamate N-carboxyanhydride(BLG-NCA) and its subsequent deprotection of benzyl groups. The PLGA chains were cross-linked with cystamine, and thus forming a type of redox responsive drug delivery system(MSN-cPLGA). The structures were characterized by Fourier transform infrared spectrometry(FTIR), transmission electron microscopy(TEM) and energy disperse spectrometry(EDS), demonstrating that disulfide groups existed on the surfaces of MSN-cPLGA particles. The thermal gravimetric analysis(TGA) results show that the PLGA mass fraction is about 33.4% in the MSN-cPLGA hybrid. The in vitro drug release experiments showed that the MSN-cPLGA hybrid can realize the controlled release of model drugs(5-fluorouracil) in response to redox environment. Even 0.1 mmol/L dithiothreitol(DTT) can accelerate the drug release speed, and a concentration of 10.0 mmol/L DTT is higher enough to trigger the open of cross-linked PLGA network so as to realize rapid release of drugs. All the results demonstrate that the cross-linked PLGA chains on the surface of MSN could act as efficient gatekeepers to control the on-off of the pores, showing potential application in drug delivery system. 展开更多
关键词 Mesoporous silica nanoparticle Redox responsive Drug delivery Surface modification Hybrid
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Alternating Terpolymers Based on Tunable Bi-donors with Manipulating Energy Levels and Molecular Geometry 被引量:1
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作者 chen Zhenzhu YANG Jia +2 位作者 WU Feiyan chen Lie chen yiwang 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2017年第2期305-311,共7页
Three novel regular acceptor-donorl-acceptor-donor2(A-D1-A-D2) terpolymers were prepared via em-bedding a second donor(D2) unit into the traditional D-A backbone to manipulate the energy levels and moleculargeomet... Three novel regular acceptor-donorl-acceptor-donor2(A-D1-A-D2) terpolymers were prepared via em-bedding a second donor(D2) unit into the traditional D-A backbone to manipulate the energy levels and moleculargeometry with no complex synthesis or solubility loss. In these A-D1-A-D2 terpolymers, benzodithiophene(BDT, D1)and diketopyrrolopyrrole(DPP, A) were selected as the basic skeleton, and the dithienopyrrole(DTPy), carbazole(CZ)and fluorine(FL) units with different electron donating ability were chosen as the second donor trait(D2). The HOMOenergy levels can be effectively modulated by only varying D2 unit because of the push-pull interaction between do-nor and acceptor units. Versus the D-A bipolymer PDPP-BDT, incorporation of the D2 unit into the copolymers candistinctly lower the highest occupied molecular orbital(HOMO) levels to -5.47 eV for PDDPP-BDT-DTPy, -5.38 eVfor PDDPP-BDT-CZ and -5.23 eV for PDDPP-BDT-FL, which shows the strong dependence on electron-donatingability. Density functional theory(DFT) simulation and X-ray diffraction(XRD) measurements also reveal the effectof the D2 units on the molecular geometry of the terpolymers and their molecular packing. Notably, aPDDPP-BDT-DTPy combined with a thiophene ring and forked tail pendant away from the backbone had less back-bone torsion and more compact packing than the other two counterparts. These results demonstrate that embedding asecond donor(D2) unit into the backbone to construct an A-D1-A-D2 structure can be an effective and direct strategyto manipulate the energy levels and molecular geometry and develop organic semiconducting materials. 展开更多
关键词 TERPOLYMER Electron-donating Energy level MOLECULAR GEOMETRY
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Surface Modifications of Halloysite Nanotubes with Superparamagnetic Fe304 Nanoparticles and Carbonaceous Layers for Efficient Adsorption of Dyes in Water Treatment
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作者 JIANG Ling ZHANG Chao +4 位作者 WEI Junchao TJIU Wengweei PAN Jisheng chen yiwang LIU Tianxi 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2014年第6期971-977,共7页
Surface modification of halloysite nanotube(HNT) with in situ grown Fe304 nanoparticles and carbona- ceous layers introduced by a hydrotbermal carbonization process of glucose has been achieved. Structure and mor- p... Surface modification of halloysite nanotube(HNT) with in situ grown Fe304 nanoparticles and carbona- ceous layers introduced by a hydrotbermal carbonization process of glucose has been achieved. Structure and mor- phology investigations demonstrate that iron oxide nanoparticles are uniformly anchored on the halloysite and pre- vent the aggregations of halloysite and carbon, forming a protective layer that stabilizes and improves the property of HNT/Fe3OdC nanocomposite. Magnetism characterization proves the superparamagnetic behavior of HNT/Fe304/C hybrid at room temperature, which makes it easily separated from dye solution under an external magnetic field. Ex- ploration of adsorption ability demonstrates that the maximum adsorption capacity of the as-prepared HNT/Fe304/C nanoeomposite for methylene blue(MB) is about twice and 1.5 times those of HNT/Fe304 and HNT according to Langmuir equation, respectively. The adsorption behavior investigations indicate that HNT/Fe304/C hybrid has a he- terogeneous structure and shows a non-ideal monolayer adsorption that fits the Redlich-Peterson isotherm, and the adsorption process follows a pseudo-second-order kinetic model. Therefore, the as-prepared HNT/Fe304/C hybrid is a fast, separatable and superparamagnetic adsorbent with a good adsorption ability, demonstrating great potential in the application of water treatment. 展开更多
关键词 HALLOYSITE Hydrothermal carbonization Superparamagnetic iron oxide Water purification
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