检索结果-南通市图书馆

Buried interface bridging for inverted cesium-formamidinium triiodide perovskite solar cells with long operational stability

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 163-173页

作者： Chenhui Zhang Chunjun liang Fulin Sun Ting Zhu Xinghai Huang Yuzhu guo Xinyu guo Kunyang Ge Dan li Fangtian You Zhiqun He Key Laboratory of Luminescence and Optical Information Ministry of Education Institute of Optoelectronic TechnologyBeijing Jiaotong University Department of Physics School of Physical Science and Engineering Beijing Jiaotong University

In the field of perovskite solar cells(PSCs), the research on defects in the buried interface has been relatively limited due to its non-exposure; however, this interface significantly impacts the performance enhancement of inverted PSCs. This study employs phenylethylammonium chloride(PEACl) molecules as a buffer layer to modify the buried interface of p-i-n structured PSCs,aiming to enhance the uniformity of self-assembled monolayers(SAMs) and facilitate the uniform nucleation and growth of perovskite films on the substrate. Furthermore, the introduction of the PEACl buffer layer effectively passivates defects at the bottom of the perovskite layer and notably enhances the crystal quality of the perovskite film by mitigating residual stress,thereby reducing nonradiative recombination loss. Following these optimizations, the MA-free PSCs treated with PEACl achieve a power conversion efficiency(PCE) of 24.11%, with significant improvements in storage, thermal stability, and operational stability. Particularly noteworthy is the device's performance in an unencapsulated state, whereas after 1,500 hours of continuous light operation stability testing, it retains 97% of its original efficiency. This study not only enriches the systematic understanding of the characteristics of the buried interface in PSCs but also contributes significantly to advancing the commercial production of perovskite photovoltaic technology.

关键词： defect-induced recombination buried interfaces inverted perovskite solar cells crystallization lattice mismatch

Distributed optimal consensus control for multiagent systems based on event-triggered and prioritized experience replay strategies

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2025年第1期68卷 306-321页

作者： Cuijuan ZHANG lianghao JI Shasha YANG Xing guo Huaqing li Chongqing Key Laboratory of Image Cognition Chongqing University of Posts and Telecommunications Key Laboratory of Intelligent Perception and Computing of Anhui Province Anqing Normal University College of Electronic and Information Engineering Southwest University

This study uses event-triggered(ET) and reinforcement learning methods to investigate the optimal consensus control problem for cooperative-competitive multiagent systems. It proposes a novel distributed ET control strategy, which relies on a prioritized experience replay(PER) policy. This strategy not only conserves communication resources but also ensures acceptable system performance. To implement the proposed method, actor-critic(AC) dual-structured neural networks(NNs) are used to approximate the value function and control policy. In the AC NNs, the weight estimates for the NNs are updated at the moment of event triggering, resulting in a nonperiodic weight adjustment pattern. This approach decreases the computational cost in comparison with the traditional ET mechanism. The PER-based ET mechanism makes full use of valid historical data and effectively establishes a balance between system performance and communication resource ***, it does not require the following two conditions in most existing studies:(1) requirement of the system dynamics model to be known, and(2) persistent excitation. In addition, Zeno behavior is excluded from this study. Finally, a simulation is conducted to confirm the validity of the suggested approach.

关键词： multiagent systems event-triggered mechanism prioritized experience replay dual-structured neural networks optimal consensus control

Morphological Mechanism and Experimental Verification of Self-healing of Basalt-fiber Modified Water-soaked Asphalt

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 171-186页

作者： XIAO Minmin DONG Jinyong li Chunyan guo Xu REN Jianguo School of Urban Construction and Safety Engineering Shanghai Institute of TechnologyShanghai 201418China

This study investigates the mechanism of action of representative molecules of basalt fibers on the healing of water-soaked *** parameters,morphological characteristics,interfacial healing energy,and interfacial healing strength were analyzed using molecular dynamics and macroscopic tests under different time,temperature,and water conditions to evaluate the specific states and critical conditions involved in *** results indicate that basalt-fiber molecules can induce rearrangement and a combination of water-soaked asphalt at the healing *** groups with different bonding states increase the interfacial adsorption capacity of water-soaked *** interaction between basalt fiber molecules and water molecules leads to a"hoop"phenomenon,while aromatics-2 molecules exhibit a"ring band aggregation"*** former reduces the miscibility of water and asphalt molecules,while the latter causes slow diffusion of the ***,a micro-macro dual-scale comparison of interfacial healing strength was conducted at temperatures of 297.15 and 312.15 K to identify the strength transition point and critical temperature of 299.4 K during the self-healing process of basalt-fiber modified water-soaked asphalt.

关键词： water-soaked asphalt basalt-fibers self-healing properties moisture status molecular characterization

在线全文

学校读者我要写书评

暂无评论

抗衰老口服液对自然衰老大鼠自由基的影响

吉林大学学报（医学版） 2006年第4期32卷 606-608页

作者：郭丽荣梁爽李峰郭中钰李芳菲祝世功李扬吉林大学基础医学院病理生理学教研室吉林长春130021 复旦大学药学院北京大学医学部生理系北京100081

目的:探讨中草药复方制剂抗衰老口服液(AOP)对自然衰老大鼠自由基的清除作用及其机制。方法:健康自然衰老Wistar大鼠(22月龄)40只,分为5组:对照组,AOP低、中、高剂量组,青春宝抗衰老片(QCB)组。灌胃给药,每天1次,30 d后大鼠断头处死,取... 详细信息

目的:探讨中草药复方制剂抗衰老口服液(AOP)对自然衰老大鼠自由基的清除作用及其机制。方法:健康自然衰老Wistar大鼠(22月龄)40只,分为5组:对照组,AOP低、中、高剂量组,青春宝抗衰老片(QCB)组。灌胃给药,每天1次,30 d后大鼠断头处死,取血,分离血浆;取心肌组织和脑组织,液氮冻存。检测血浆超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、丙二醛(MDA)、一氧化氮(NO),脑组织腺苷三磷酸酶(ATPE)以及心肌脂褐素的含量。结果:AOP中、高剂量组和QCB组大鼠血浆SOD含量、CAT含量、大脑皮层中ATP酶的含量均高于对照组(P<0.05);血浆NO含量、MDA含量、心肌脂褐质含量均低于对照组(P<0.05)。结论:中、高剂量AOP可减少自然衰老大鼠血浆自由基的产生、加速自由基的清除,促进脑组织能量代谢,具有抗衰老的生物学作用。

关键词：衰老自由基超氧化物歧化酶过氧化氢酶腺苷三磷酸酶

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： Mei Zhang Wenhao li Yangfei Chen Yang Jiang Xiaofei guo Han Dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

Effects of the extrusion parameters on microstructure,texture and room temperature mechanical properties of extruded Mg-2.49Nd-1.82Gd-0.2Zn-0.2Zr alloy

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 136-146页

作者： Chenjin Zhang Guangyu Yang Lei Xiao Zhiyong Kan Jing guo Qiang li Wanqi Jie State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108China College of Chemistry and Environmental Science Qujing Normal UniversityQujing 655011China

Microstructure,texture,and mechanical properties of the extruded Mg-2.49Nd-1.82Gd-0.2Zn-0.2Zr alloy were investigated at different extrusion temperatures(260 and 320℃),extrusion ratios(10:1,15:1,and 30:1),and extrusion speeds(3 and 6 mm/s).The experimental results exhibited that the grain sizes after extrusion were much finer than that of the homogenized alloy,and the second phase showed streamline distribution along the extrusion direction(ED).With extrusion temperature increased from 260 to 320℃,the microstructure,texture,and mechanical properties of alloys changed *** dynamic recrystallization(DRX)degree and grain sizes enhanced as the extrusion ratio increased from 10:1 to 30:1,and the strength gradually decreased but elongation(EL)*** the extrusion speed increased from 3 to 6 mm/s,the grain sizes and DRX degree increased significantly,and the samples presented the typical-rare-earth(RE)*** alloy extruded at 260℃ with extrusion ratio of 10:1 and extrusion speed of 3 mm/s showed the tensile yield strength(TYS)of 213 MPa and EL of 30.6%.After quantitatively analyzing the contribution of strengthening mechanisms,it was found that the grain boundary strengthening and dislocation strengthening played major roles among strengthening *** results provide some guidelines for enlarging the industrial application of extruded Mg-RE alloy.

关键词： Mg-rare earth alloys extrusion temperature extrusion ratio extrusion speed strengthening mechanisms

在线全文

学校读者我要写书评

暂无评论

冰片β-环糊精包结物制备方法的比较研究

时珍国医国药 2011年第6期22卷 1462-1464页

作者：郭丽蓉周莉玲广州中医药大学中药学院广东广州510006

目的探索β-环糊精包合冰片的最佳工艺条件。方法以包结率和包结物的收得率为指标,以冰片∶β-环糊精的配比、包合时间和包合温度为考察因素,采用正交实验对饱和溶液法制备冰片β-环糊精包结物的工艺进行优选;以冰片∶β-环糊精的配比... 详细信息

目的探索β-环糊精包合冰片的最佳工艺条件。方法以包结率和包结物的收得率为指标,以冰片∶β-环糊精的配比、包合时间和包合温度为考察因素,采用正交实验对饱和溶液法制备冰片β-环糊精包结物的工艺进行优选;以冰片∶β-环糊精的配比、包合时间为考察因素,采用单因素实验法对研磨法制备冰片包结物的工艺进行优选。结果饱和溶液法的最佳工艺是冰片∶β-环糊精(1∶6),温度为60℃,包合时间为1.5 h;研磨法的最佳工艺是冰片∶β-环糊精(1∶8),包合时间2 h。结论采用饱和溶液法制备包结物时,β-环糊精用量少,包合时间较短,且收得率和包合率均较高,故饱和溶液法较优。

关键词： β-环糊精冰片包结物

在线全文

学校读者我要写书评

暂无评论

芎冰鼻腔喷雾剂制备过程研究

时珍国医国药 2011年第11期22卷 2735-2738页

作者：郭丽蓉周莉玲广州中医药大学中药学院广东广州510006

目的测定川芎药材、川芎提取纯化物及芎冰鼻腔喷雾剂的指纹图谱,研究制剂制备过程成分变化,为有效控制其质量提供可靠方法。方法高效液相色谱法,Phenomenex Hyperclone BDS C18(250 mm×4.00 mm,5μm),甲醇∶1%冰乙酸为流动相,梯度洗脱,... 详细信息

目的测定川芎药材、川芎提取纯化物及芎冰鼻腔喷雾剂的指纹图谱,研究制剂制备过程成分变化,为有效控制其质量提供可靠方法。方法高效液相色谱法,Phenomenex Hyperclone BDS C18(250 mm×4.00 mm,5μm),甲醇∶1%冰乙酸为流动相,梯度洗脱,322 nm检测。结果川芎药材、川芎提取纯化物、芎冰鼻腔喷雾剂指纹图谱峰数多,分离好,有相关性,重现性好。结论方法科学、准确、专属性好,可为芎冰鼻腔喷雾剂及含川芎的中成药质量控制提供可靠的科学依据。

关键词：芎冰鼻腔喷雾剂指纹图谱高效液相色谱法

在线全文

学校读者我要写书评

暂无评论

聚氧乙烯山梨糖醇酐单油酸酯增溶冰片的研究

中国实验方剂学杂志 2010年第12期16卷 10-11,13页

作者：郭丽蓉周莉玲广州中医药大学中药学院广州510006

目的:研究聚氧乙烯山梨糖醇酐单油酸酯(吐温-80)增溶冰片的最佳配比。方法:相同量的吐温-80中分别加入不同量的冰片,以澄清度为指标,筛选出冰片、吐温-80增溶最佳配比。结论及结果:吐温-80与冰片质量比为15∶1时,溶液稳定且可稀释百倍... 详细信息

目的:研究聚氧乙烯山梨糖醇酐单油酸酯(吐温-80)增溶冰片的最佳配比。方法:相同量的吐温-80中分别加入不同量的冰片,以澄清度为指标,筛选出冰片、吐温-80增溶最佳配比。结论及结果:吐温-80与冰片质量比为15∶1时,溶液稳定且可稀释百倍而不析出冰片晶体。

关键词：吐温-80 冰片增溶澄清度