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A chlorinated lactone polymer donor featuring high performance and low cost

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Journal of Semiconductors 2022年第5期43卷 15-31页

作者： Ke Jin Zongliang Ou Lixiu Zhang Yongbo Yuan zuo xiao Qiuling Song Chenyi Yi Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China College of Materials Science&Engineering Huaqiao UniversityXiamen 361021China State Key Laboratory of Power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084China School of Physics and Electronics Central South UniversityChangsha 410083China

The development of low-bandgap nonfullerene acceptors and wide-bandgap polymer donors speeds up the advance of organic solar cells(OSCs)[1-17]. Wide-bandgap copolymers based on fused-ring acceptor units are ideal donor materials due to their low-lying HOMO levels, high hole mobilities and complementary light absorption to nonfullerene acceptors[18-25]. Currently, high-performance donors with 18%power conversion efficiencies(PCEs) belong to this type.

关键词： donor polymer performance

Design and application of a multichannel"cross"hot tearing tendency device:A study on hot tearing tendency of Al alloys

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China Foundry 2022年第4期19卷 327-334页

作者： Ming Su Wen-tao Zheng Deng-ke Fu Hong-jun Huang xiao-jiao zuo Chun-yu Yue Yu-xiang Wang xiao-guang Yuan School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China

Hot tearing is one of the most serious defects during the casting solidification *** this study,a new type of multichannel"cross"hot tearing device was *** hot cracks initiation and propagation were predicted by the relationship between temperature,shrinkage force and solidification time during the casting solidification *** reliability and practicability of the multichannel"cross"hot tearing device were verified by casting experiments and numerical *** theoretical calculation based on Clyne-Davies model and numerical simulation results show that the hot tearing tendency decreases in the order:2024 Al alloy>Al-Cu alloy>Al-Si alloy at a pouring temperature of 670°C and a mold temperature of 25°*** of liquid films at the end of solidification plays an important role in the propagation process of hot *** decrease of hot tearing tendency is attributed to the feeding of liquid film and intergranular bridging.

关键词： hot tearing testing device hot cracking tendency solidification process formation mechanism numerical simulation

Impact wear properties of dissimilar joints between bainitic frogs and pearlite rails

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Journal of Iron and Steel Research(International) 2024年第1期31卷 275-287页

作者： Pin-yong Zeng Chun-guang zuo xiao-yu Zhang Wei Li Tribology Research Institute Southwest Jiaotong UniversityChengdu610031SichuanChina

The impact wear behavior and damage mechanism of dissimilar welded joints between U26Mn frog and U75 V rail before and after normalizing treatment were studied by cyclic impact *** experiment indicated that the impact wear volume of the joints increased with the increasing number of impact *** main wear mechanisms include pitting wear,mild fatigue wear,delamination wear,and fatigue wear,and plastic deformation was the primary impact wear *** them,fatigue wear had the greatest influence on wear volume,while other wear mechanisms had limited *** impact wear resistance of the base material was better than that of the heat-affected *** treatment was beneficial to improving the impact wear resistance of welded joints owing to its effect to promote pearlite recovery,grain refinement,and uniform distribution of *** martensite generated in the rail welded joints aggravated the impact wear damage to the materials,which should be avoided.

关键词： Dissimilar welded joint Impact wear Bainitic steel Damage mechanism Wear rate

川芎-天麻药对对偏头痛模型大鼠眶周机械痛阈及三叉神经节AMPK/TRPA1通路的影响

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中医杂志 2024年第7期65卷 722-727页

作者：左笑梁丽琦唐岚琦蒙睿娜房冰莹王海芳崔海燕刘晓华陕西中医药大学陕西省咸阳市712046 西藏民族大学

目的基于腺苷酸活化蛋白激酶(AMPK)/瞬时受体电位A1通道(TRPA1)通路探究川芎-天麻药对治疗偏头痛的可能作用机制。方法48只健康雄性SD大鼠随机分为对照组、模型组、川芎-天麻药对组,每组16只。对照组和模型组给予10 ml/kg生理盐水灌胃,... 详细信息

目的基于腺苷酸活化蛋白激酶(AMPK)/瞬时受体电位A1通道(TRPA1)通路探究川芎-天麻药对治疗偏头痛的可能作用机制。方法48只健康雄性SD大鼠随机分为对照组、模型组、川芎-天麻药对组,每组16只。对照组和模型组给予10 ml/kg生理盐水灌胃,川芎-天麻药对组给予0.675 g/kg川芎-天麻灌胃,均每天1次,连续8天。末次给药前造模,对照组皮下注射生理盐水10 ml/kg,模型组和川芎-天麻药对组皮下注射硝酸甘油10 ml/kg制备偏头痛模型大鼠。运用Von Frey纤毛测定大鼠眶周机械痛阈值;采用酶联免疫吸附测定法(ELISA)测定大鼠血清、脑脊液中降钙素基因相关肽(CGRP)水平;一氧化氮(NO)试剂盒测定血清、脑脊液中NO水平;RT-PCR法检测大鼠三叉神经节中即刻早期基因(c-Fos)、CGRP、瞬时受体电位V1通道(TRPV1)、腺苷酸活化蛋白激酶A(PRKAA)及TRPA1 mRNA表达水平;免疫荧光法检测三叉神经颈复合体(TCC)中c-Fos阳性细胞数和三叉神经节磷酸化腺苷酸活化蛋白激酶(pAMPK)、TRPA1蛋白表达水平。结果与对照组比较,模型组大鼠机械刺激阈值、pAMPK蛋白表达降低,血清中CGRP、NO水平,三叉神经节c-Fos、CGRP、TRPV1、TRPA1 mRNA表达水平,TRPA1蛋白表达和TCC中c-Fos阳性细胞数均显著升高(P<0.05)。与模型组比较,川芎-天麻药对组大鼠机械刺激阈值、pAMPK蛋白表达显著上升,血清中CGRP、NO水平,三叉神经节中c-Fos、CGRP、TRPV1、TRPA1 mRNA表达水平,TRPA1蛋白表达和TCC中c-Fos阳性细胞数明显下降(P<0.05)。结论川芎-天麻药对可能通过调控三叉神经节中AMPK/TRPA1通路,升高机械痛阈,从而改善偏头痛症状。

关键词：偏头痛川芎天麻三叉神经节痛阈腺苷酸活化蛋白激酶瞬时受体电位A1通道

扶正驱邪方联合新辅助化疗对三阴性乳腺癌患者肿瘤复发、血清TK1 水平及免疫功能的影响

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广州中医药大学学报 2024年第4期41卷 881-887页

作者：左晓娜谢昱伟刘欣王佳李萌胡志伟沧州中西医结合医院东院区放化疗科河北沧州061012 沧州中西医结合医院骨伤院区重症医学科河北沧州061012 沧州中西医结合医院放化疗六科河北沧州061012

【目的】探究扶正驱邪方联合新辅助化疗对三阴性乳腺癌(TNBC)患者肿瘤复发、血清胸苷激酶1(TK1)水平及免疫功能的影响。【方法】将80例TNBC气阴两虚型患者随机分为联合组和对照组,每组各40例。对照组给予AC-T序贯化疗方案(多柔比星与环... 详细信息

【目的】探究扶正驱邪方联合新辅助化疗对三阴性乳腺癌(TNBC)患者肿瘤复发、血清胸苷激酶1(TK1)水平及免疫功能的影响。【方法】将80例TNBC气阴两虚型患者随机分为联合组和对照组,每组各40例。对照组给予AC-T序贯化疗方案(多柔比星与环磷酰胺联合并序贯多西他赛)治疗,联合组在对照组的基础上加用扶正驱邪方治疗。1个疗程为21 d,连续治疗4个疗程。观察2组患者治疗前后中医证候积分、生活质量Karnofsky功能状态(KPS)评分、肿瘤标志物[糖类抗原125(CA125)、糖类抗原153(CA153)、TK1]水平及T淋巴细胞亚群的变化情况,比较2组患者的临床疗效以及肿瘤的转移、复发情况。【结果】(1)治疗4个疗程后,联合组的总有效率为87.50%(35/40),对照组为67.50%(27/40),组间比较(χ2检验),联合组的疗效明显优于对照组(P<0.05)。(2)治疗后,2组患者的中医证候积分均较治疗前明显降低(P<0.05),KPS评分均较治疗前明显升高(P<0.05),且联合组对中医证候积分的降低幅度及对KPS评分的升高幅度均明显优于对照组(P<0.05或P<0.01)。(3)治疗后,2组患者的血清CA125、CA153、TK1水平均较治疗前明显降低(P<0.05),且联合组对血清CA125、CA153、TK1水平的降低幅度均明显优于对照组(P<0.01)。(4)治疗后,2组患者的T细胞CD3+、CD4+水平和CD4+/CD8+比值均较治疗前明显升高(P<0.05),CD8+水平均较治疗前明显降低(P<0.05),且联合组对T细胞CD3+、CD4+水平和CD4+/CD8+比值的升高幅度及对CD8+水平的降低幅度均明显优于对照组(P<0.05或P<0.01)。(5)经过1年的随访调查,联合组的肿瘤复发率和肿瘤转移率分别为7.50%(3/40)和12.50%(5/40),明显低于对照组的25.00%(10/40)和35.00%(14/40),组间比较,差异均有统计学意义(P<0.05)。【结论】扶正驱邪方联合新辅助化疗对于TNBC气阴两虚型患者的治疗效果较好,能有效改善患者的免疫功能,降低血清肿瘤标志物水平,提高患者的生活质量,降低肿瘤复发和转移的发生率。

关键词：扶正驱邪方新辅助化疗三阴性乳腺癌血清胸苷激酶1 生活质量免疫功能

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教育大模型的发展现状、创新架构及应用展望

现代教育技术 2024年第2期34卷 5-12页

作者：曹培杰谢阳斌武卉紫杨媛媛沈苑左晓梅黄宝忠中国教育科学研究院数字教育研究所北京100088 之江实验室智能教育研究中心浙江杭州311112

从通用大模型到教育大模型,是人工智能大模型技术深化发展的重要趋势。基于对教育大模型发展现状、典型案例、潜在挑战的分析,文章认为教育大模型是适用于教育场景、具有超大规模参数、融合通用知识和专业知识训练形成的人工智能模型,... 详细信息

从通用大模型到教育大模型,是人工智能大模型技术深化发展的重要趋势。基于对教育大模型发展现状、典型案例、潜在挑战的分析,文章认为教育大模型是适用于教育场景、具有超大规模参数、融合通用知识和专业知识训练形成的人工智能模型,是大模型技术、知识库技术及各类智能教育技术的集成,能够推动人类学习和机器学习的双向建构,进而提出了应用驱动、共建共享的创新架构和“以学习者为中心”的未来应用场景,旨在建立人工智能大模型与各类数字化教育应用的开放接口,持续训练和完善能够更好地解决教育专业问题的教育场景模型,形成让广大师生常态化使用的智能教育开放模型集群和知识库,在提炼和萃取深度教育知识的同时,破解人工智能教育应用中的风险和挑战。

关键词：教育大模型生成式人工智能智能教育教育大数据

Self‑Generated Buried Submicrocavities for High‑Performance Near‑Infrared Perovskite Light‑Emitting Diode

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Nano-Micro Letters 2023年第8期15卷 355-367页

作者： Jiong Li Chenghao Duan Qianpeng Zhang Chang Chen Qiaoyun Wen Minchao Qin Christopher C.S.Chan Shibing Zou Jianwu Wei zuo xiao Chuantian zuo Xinhui Lu Kam Sing Wong Zhiyong Fan Keyou Yan School of Environment and Energy State Key Lab of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Solid Wastes Pollution Control and RecyclingSouth China University of TechnologyGuangzhou 510000People’s Republic of China Department of Electronic and Computer Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongPeople’s Republic of China Department of Physics The Chinese University of Hong KongShatinHong KongPeople’s Republic of China Department of Physics The Hong Kong University of Science and TechnologyClear Water BayKowloon 999077Hong KongPeople’s Republic of China School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004People’s Republic of China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190People’s Republic of China

ABSTRACT Embedding submicrocavities is an effective approach to improve the light out-coupling efficiency(LOCE)for planar perovskite light-emitting diodes(PeLEDs).In this work,we employ phenethylammonium iodide(PEAI)to trigger the Ostwald ripening for the downward recrystallization of perovskite,resulting in spontaneous formation of buried submicrocavities as light output *** simulation suggests the buried submicrocavities can improve the LOCE from 26.8 to 36.2%for near-infrared ***,PeLED yields peak external quantum efficiency(EQE)increasing from 17.3%at current density of 114 mA cm^(−2)to 25.5%at current density of 109 mA cm^(−2)and a radiance increasing from 109 to 487 W sr^(−1)m^(−2)with low *** turn-on voltage decreased from 1.25 to 1.15 V at 0.1 W sr^(−1)m^(−2).Besides,downward recrystallization process slightly reduces the trap density from 8.90×10^(15)to 7.27×10^(15)cm^(−3).This work provides a self-assembly method to integrate buried output coupler for boosting the performance of PeLEDs.

关键词： Perovskite light-emitting diodes Downward recrystallization Buried submicrocavities Light out-coupling efficiency Radiative recombination

Monitoring glaciers in the Chenab basin with SBAS InSAR technology

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Journal of Mountain Science 2022年第9期19卷 2622-2633页

作者： DING Yue-kai LIU Rui FAN Yi-fei ZHOU Ling-xiang JI Qin ZHANG Hong xiao zuo-lin The Key Laboratory of GIS Application Research School of Geography and TourismChongqing Normal UniversityChongqing 401331China

The Chenab basin is located in northwest India and eastern *** in Chenab basin,as local freshwater resources,are very important to the regional ecological environment and *** the same time,SBAS InSAR can monitor the deformation of the ground for a long time,the monitoring accuracy can reach mm level,and can obtain the time series change of deformation,whcih provides a new idea and method for glacier *** this study,the deformation from SBAS InSAR was combined with glacial area data to study the glacial changes in Chenab ***-1 and Landsat series images were used to obtain the deformation and change in the area of glaciers by SBAS InSAR and the semi-automated *** results showed that glaciers in the Chenab basin retreated rapidly,especially in the past ten *** glacier area decreased by 88.05 km^(2)in 1990~2000 and 118.86 km^(2) in 2000~2010,and the glacier area decreased by 236.01 km^(2) in 2010~2020,which was the largest rate of change of 9.49%.Moreover,glacial deformation decreased in 2020,and the deformation rate ranged from-146.3mm/a to 119.52 mm/*** glaciers had deformation rates between-50 mm/a and 50 mm/*** by precipitation and temperature,glacial deformation in the Chenab basin started to change in August,the maximum accumulation was 6,828.43mm,and the minimum ablation was-20,656.41 mm.

关键词： Glacier retreat SBAS-InSAR Climate change Chenab basin

Switchable Multicomponent Cyclization Reactions to Access Fluoroalkylated Dihydropyrimidines and Pyrimidines under Solvent-Free Conditions

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Chinese Journal of Chemistry 2024年第12期42卷 1394-1398页

作者： Wanqing zuo Zhizhen Zhu Yu Cheng Lingling zuo xiao Geng Zhifang Li Lei Wang College of Material Chemistry and Chemical Engineering Key Laboratory of Organosilicon Chemistry and Material TechnologyMinistryof EducationHangzhouNormal UniversityHangzhouZhejiang311121China Advanced Research Institute and School of Pharmaceutical Sciences Taizhou UniversityJiaojiangZhejiang 318000China state Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai200032China

Comprehensive Summary The development of switchable solvent-free multicomponent reactions to build high-value-added products is an important demand for organic ***,we detailed the successful implementation of a switchable strategy for the construction of diverse 4-fluoroalkyl-1,4-dihydropyrimidines and 4-fluoroalkyl-pyrimidines via a solvent/additive-free[3+2+1]annulation,starting from readily available enamines,trifluoroacetaldehyde hydrate or 1-ethoxy-2,2-difluoroethanol and amidines *** reaction conforms to the concept of green synthesis,and provides a new avenue to access valuable fluorinated heterocycles.

关键词： Fluorine chemistry Multicomponent reactions Environmental chemistry Heterocycles Enaminones Amidines