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Economic effect of China's carbon neutrality target under shared socioeconomic pathways

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Science China Earth Sciences 2025年第1期68卷 142-157页

作者： Zemiao LIU Xianjin HUANG xinxian QI School of Geography and Ocean Science Nanjing UniversityNanjing210023China Key Laboratory of Carbon Neutrality and Territory Optimization Ministry of Natural ResourcesNanjing210023China Frontiers Science Center for Critical Earth Material Cycling Nanjing UniversityNanjing210023China

Economic feasibility is crucial for achieving the carbon neutrality ***,current integrated assessments often underestimate the economic impacts of mitigation policies due to the lack of consideration of their economic *** study integrates a warming-labour productivity model with a typical integrated assessment model using shared socioeconomic *** simulates China's economic development and carbon emission levels under both baseline and carbon-neutral policy scenarios,evaluating the economic costs and benefits of emission reduction policies aimed at achieving carbon *** findings reveal the following:(1)The economic costs of emission reduction policies are projected to peak between 2050 and 2060,ranging from 0.41%to 9.37%of total GDP in the baseline scenario,primarily due to increased energy prices and R&D *** costs are expected to decline rapidly after 2070.(2)China's carbon-neutral policies will mitigate global warming,with the economic benefits of mitigation projected to reach 5.65%to 17.24%of China's total GDP by 2100.(3)Lowcarbon scenarios SSP1 and SSP4 could significantly reduce initial economic costs and advance the onset of net economic gains to *** integrated assessment confirms that China's carbon neutrality target offers substantial net economic benefits in the long *** minimize initial economic costs,efforts should focus on enhancing consumption-side transitions,upgrading lowcarbon technologies,and adopting new energy sources.

关键词： Climate change China Carbon neutrality Economic effects Policy

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Case Study of the Relationship between Sleep Quality and Academic Performance

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Journal of Behavioral and Brain Science 2025年第1期15卷 1-10页

作者： Leying Wang xinxian Lu Guangdong Country Garden School Foshan China

Background: The study’s primary research suggests the relationship between high-school international students in China’s sleep quality and learning efficiency which is academic performance. Considering the effect of Chinese traditional cultural background, this study mainly investigates Chinese international high school students’ sleeping quality and patterns through the Pittsburgh Sleep Quality Index. Methods: A sample of 249 Chinese high school students in the Pearl River Region completed the questionnaire about their sleep quality using PSQI, their academic performance, and socio-demographic factors one month before the final exam in July 2023. Results: None of the students have good sleep quality, according to the PSQI;40.8% of students have poor sleep quality, and 59.2% have significant sleep disturbance. The results of ordinal logistic regression show that good sleep quality is positively associated with good academic performance. Conclusion: Our findings highlight the association between sleep and academic performance on the unique sleep patterns of Chinese international high school students, who often follow very different sleep patterns from other conventional students enrolled in the regular curriculum. High school students suffer from severe sleep deprivation and poor sleep quality. Under great academic stress, Chinese high school students should know the importance of sleep, balance sleep, and study.

关键词： Sleep Quality Academic Performance Chinese Adolescents

SO_4^(2-)/TiO_2-WO_3催化合成丁醛1,2-丙二醇缩醛

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稀有金属 2006年第6期30卷 893-895,896页

作者：杨水金杜心贤白爱民湖北师范学院化学与环境工程系湖北黄石435002

以固体超强酸SO42-/TiO2-WO3为催化剂,对以丁醛和1,2-丙二醇为原料合成丁醛1,2-丙二醇缩醛的反应条件进行了研究。实验表明:SO42-/TiO2-WO3是合成丁醛1,2-丙二醇缩醛的良好催化剂,研究了醛醇摩尔比、催化剂用量、反应时间诸因素对收率... 详细信息

以固体超强酸SO42-/TiO2-WO3为催化剂,对以丁醛和1,2-丙二醇为原料合成丁醛1,2-丙二醇缩醛的反应条件进行了研究。实验表明:SO42-/TiO2-WO3是合成丁醛1,2-丙二醇缩醛的良好催化剂,研究了醛醇摩尔比、催化剂用量、反应时间诸因素对收率的影响。最佳反应条件为:n(丁醛)/n(1,2-丙二醇)=1/1.4,催化剂用量为反应物料总质量的0.5%,环己烷为带水剂,反应时间50 min。上述条件下,丁醛1,2-丙二醇缩醛的收率可达84.6%。

关键词：丁醛1,2-丙二醇缩醛 SO4^2-/TiO2-WO3 催化缩醛化

硅钨钼杂多酸掺杂聚苯胺催化合成苯甲醛1,2-丙二醇缩醛

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精细石油化工进展 2006年第1期7卷 47-50页

作者：杨水金杜心贤湖北师范学院化学与环境工程系黄石435002

以自制硅钨钼杂多酸掺杂聚苯胺H4SiW6Mo6O40／PAn为多相催化剂,以苯甲醛和1,2 -丙二醇为原料合成苯甲醛1,2-丙二醇缩醛,较系统地研究了原料摩尔比、催化剂用量、反应时间诸因素对产品收率的影响。结果表明,适宜反应条件为:苯甲醛与1,2-... 详细信息

以自制硅钨钼杂多酸掺杂聚苯胺H4SiW6Mo6O40／PAn为多相催化剂,以苯甲醛和1,2 -丙二醇为原料合成苯甲醛1,2-丙二醇缩醛,较系统地研究了原料摩尔比、催化剂用量、反应时间诸因素对产品收率的影响。结果表明,适宜反应条件为:苯甲醛与1,2-丙二醇的摩尔比为1: 1．5,催化剂用量为反应物料总质量的0．25％,环己烷为带水剂,反应时间45 min。上述条件下,苯甲醛1,2-丙二醇缩醛的收率为85．6％。

关键词：苯甲醛1,2-丙二醇缩醛 H4SiW6Mo6P40/PAn 催化合成

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钢轨表面伤损的细粒度图像识别

同济大学学报(自然科学版) 2025年第1期53卷 99-106页

作者：周宇姚心弦姚凯洲陆乾晖张子豪同济大学道路与交通工程教育部重点实验室上海201804 同济大学上海市轨道交通结构耐久与系统安全重点实验室上海201804 上海地铁维护保障有限公司工务分公司上海200233

基于智慧工务对钢轨轨面状态和伤损的精准识别、定量化修理等需求,结合深度学习和机器视觉,提出了钢轨轨面伤损细粒度图像识别与量化方法。通过采集轨面状态和伤损图像并实现伤损细粒度标注,建立轨面伤损RD-1094数据集,其中的目标密度... 详细信息

基于智慧工务对钢轨轨面状态和伤损的精准识别、定量化修理等需求,结合深度学习和机器视觉,提出了钢轨轨面伤损细粒度图像识别与量化方法。通过采集轨面状态和伤损图像并实现伤损细粒度标注,建立轨面伤损RD-1094数据集,其中的目标密度达到了每图22.9个。建立轨面伤损深度学习目标检测算法,通过对RD-1094数据集的训练和学习,实现了对0.5~30mm的剥离掉块、波长20~200mm的波磨等轨面伤损及其各自发展阶段特征的识别,达到毫米级细粒度。算法对单双排波磨、细小密集和轻重伤剥离掉块、单支和成片疲劳裂纹等能较好的兼容性,可以实现轨面光带形位、伤损尺寸、轻重伤总数、分布面积、波磨波长等状态和伤损的量化评估。

关键词：轨道交通钢轨表面伤损目标检测图像识别

Deep global-attention based convolutional network with dense connections for text classification

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The Journal of China Universities of Posts and Telecommunications 2020年第2期27卷 46-55页

作者： Tang Xianlun Chen Yingjie Xu Jin Yu xinxian School of Automation Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Computer Science and Technology Chongqing University of Posts and TelecommunicationsChongqing 400065China

Text classification is a classic task innatural language process(NLP).Convolutional neural networks(CNNs)have demonstrated its effectiveness in sentence and document ***,most of existing CNN models are applied to the fixed-size convolution filters,thereby unable to adapt different local *** address this problem,a deep global-attention based convolutional network with dense connections(DGA-CCN)is *** the framework,dense connections are applied to connect each convolution layer to each of the other layers which can accept information from all previous layers and get multiple sizes of local *** the local information extracted by the convolution layer is reweighted by deep global-attention to obtain a sequence representation with more valuable information of the whole sequence.A series of experiments are conducted on five text classification benchmarks,and the experimental results show that the proposed model improves upon the state of-the-art baselines on four of five datasets,which can show the effectiveness of our model for text classification.

关键词： deep learning NLP text classification CNN attention model

Protecting-Group-Free Total Synthesis of(-)-Pallambins A-D

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Chinese Journal of Chemistry 2021年第7期39卷 1983-1996页

作者： Xiwu Zhang Yuan Wang Peng Chen xinxian Cai Yanxing Jia State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical SciencesPeking University38 Xueyuan RoadBeijing100191 China

Main observation and conclusion A full account of the total synthesis of(-)-pallambins A-D(1-6)is *** strategy was devised by simulating their biosynthetic *** left-part bicyclo[3.2.1]octane system of pallambins C and... 详细信息

关键词： Terpenoids Total synthesis Enantioselectivity Protecting-Group-Free Natural products

连翘生物保鲜剂对冬枣采后链格孢菌的抑菌机理

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食品与发酵工业 2025年第2期51卷 176-184页

作者：冯云芳冯志宏张新宪高振峰贾艳兰山西农业大学食品科学与工程学院山西太原030000

为了探究连翘生物保鲜剂对冬枣采后链格孢菌的抗菌活性及其机制,通过体外抑菌实验测定最小抑菌浓度(minimum inhibitory concentration,MIC)和最小杀菌浓度(minimum bactericidal concentration,MBC),同时结合连翘生物保鲜剂对链格孢菌... 详细信息

为了探究连翘生物保鲜剂对冬枣采后链格孢菌的抗菌活性及其机制,通过体外抑菌实验测定最小抑菌浓度(minimum inhibitory concentration,MIC)和最小杀菌浓度(minimum bactericidal concentration,MBC),同时结合连翘生物保鲜剂对链格孢菌细胞成分的释放、细胞膜通透性、胞内酶活力及菌丝形态等的影响,进一步阐明连翘生物保鲜剂对链格孢菌的抑菌机理。结果表明,连翘生物保鲜剂对链格孢菌的MIC是25 mg/L,MBC是100 mg/L;经100 mg/L连翘生物保鲜剂处理后,增强了链格孢菌细胞膜通透性,导致核酸、可溶性蛋白、丙二醛(malondialdehyde,MDA)的含量和相对电导率显著上升;不仅抑制了链格孢菌Na^(+)/K^(+)-ATPase及谷胱甘肽还原酶(glutathione reductase,GR)活力,使其活力分别降低了0.58倍、1.8倍;而且显著降低了麦角甾醇的含量和呼吸抑制率。综上所述,连翘生物保鲜剂对链格孢菌具有良好的抑菌效果,通过破坏链格孢菌细胞膜结构、改变膜通透性、干扰能量代谢等途径发挥抑菌作用。

关键词：连翘生物保鲜剂冬枣链格孢菌抑菌

Host cellular signaling induced by influenza virus

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Science China(Life Sciences) 2011年第1期54卷 68-74页

作者： DAI xinxian ZHANG LiShu HONG Tao College of Life Science & Bioengineering School of Science Beijing Jiaotong University Beijing 100044 China Institute for Viral Disease Control and Prevention Chinese Centre for Disease Control and Prevention Beijing 100052 China

A wide range of host cellular signal transduction pathways can be stimulated by influenza virus infection. Some of these signal transduction pathways induce the host cell's innate immune response against influenza virus, while others are essential for efficient influenza virus replication. This review examines the cellular signaling induced by influenza virus infection in host cells, including host pattern recognition receptor (PRR)-related signaling, protein kinase C (PKC), Raf/MEK/ERK and phosphatidylinositol-3-kinase (PI3K)/Akt signaling, and the corresponding effects on the host cell and/or virus, such as recognition of virus by the host cell, viral absorption and entry, viral ribonucleoprotein (vRNP) export, translation control of cellular and viral proteins, and virus-induced cell apoptosis. Research into influenza virus-induced cell signaling promotes a clearer understanding of influenza virus-host interactions and assists in the identification of novel antiviral targets and antiviral strategies.

关键词： influenza virus virus-host interaction signal transduction