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The heat and work of quantum thermodynamic processes with quantum coherence

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Chinese Physics B 2018年第6期27卷 195-202页

作者： Shanhe Su Jinfu Chen yuhan ma Jincan Chen Changpu Sun Beijing Computational Science Research Center Beijing 100193 China Department of Physics Xiamen University Xiamen 361005 China Graduate School of the Chinese Academy of Engineenng Physics Beijing 100193 China

Energy is often partitioned into heat and work by two independent paths corresponding to the change in the eigenenergies or the probability distributions of a quantum system. The discrepancies of the heat and work for various quantum thermodynamic processes have not been well characterized in literature. Here we show how the work in quantum machines is differentially related to the isochoric, isothermal, and adiabatic processes. We prove that the energy exchanges during the quantum isochoric and isothermal processes are simply depending on the change in the eigenenergies or the probability distributions. However, for a time-dependent system in a non-adiabatic quantum evolution, the transitions between the different quantum states representing the quantum coherence can affect the essential thermodynamic properties, and thus the general definitions of the heat and work should be clarified with respect to the microscopic generic time-dependent system. By integrating the coherence effects in the exactly-solvable dynamics of quantum-spin precession, the internal energy is rigorously transferred as the work in the thermodynamic adiabatic process. The present study demonstrates that the quantum adiabatic process is sufficient but not necessary for the thermodynamic adiabatic process.

关键词： heat and work thermodynamic adiabatic process quantum coherence

Fake News Detection Based on Text-Modal Dominance and Fusing Multiple Multi-Model Clues

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Computers, materials & Continua 2024年第3期78卷 4399-4416页

作者： Li fang Fu Huanxin Peng Changjin ma yuhan Liu College of Arts and Sciences Northeast Agricultural UniversityHarbin150030China College of Engineering Northeast Agricultural UniversityHarbin150030China

In recent years,how to efficiently and accurately identify multi-model fake news has become more ***,multi-model data provides more evidence but not all are equally ***,social structure information has proven to be effective in fake news detection and how to combine it while reducing the noise information is ***,existing approaches fail to handle these *** paper proposes a multi-model fake news detection framework based on Tex-modal Dominance and fusing Multiple Multi-model Cues(TD-MMC),which utilizes three valuable multi-model clues:text-model importance,text-image complementary,and text-image ***-MMC is dominated by textural content and assisted by image information while using social network information to enhance text *** reduce the irrelevant social structure’s information interference,we use a unidirectional cross-modal attention mechanism to selectively learn the social structure’s features.A cross-modal attention mechanism is adopted to obtain text-image cross-modal features while retaining textual features to reduce the loss of important *** addition,TD-MMC employs a new multi-model loss to improve the model’s generalization *** experiments have been conducted on two public real-world English and Chinese datasets,and the results show that our proposed model outperforms the state-of-the-art methods on classification evaluation metrics.

关键词： Fake news detection cross-modal attention mechanism multi-modal fusion social network transfer learning

北极村国家级自然保护区狍栖息地适宜性及活动节律

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生态学报 2024年第18期44卷 8175-8184页

作者：田新民汲旭阳王鑫雪张子栋陈红刘小慧刘磊王启蕃马雨含钱昕玥周绍春鞠丹牡丹江师范学院生命科学与技术学院牡丹江157011 黑龙江省野生动物研究所哈尔滨150081 东北林业大学野生动物与自然保护地学院哈尔滨150040

掌握野生动物栖息地适宜性及活动节律对科学保护森林生态系统具有重要意义。狍(Capreolus pygargus)作为森林生态系统中重要组成部分,其生物学习性对于植被更新及同域物种分布具有指示作用,掌握其栖息地适宜性及活动节律是恢复生物多样... 详细信息

掌握野生动物栖息地适宜性及活动节律对科学保护森林生态系统具有重要意义。狍(Capreolus pygargus)作为森林生态系统中重要组成部分,其生物学习性对于植被更新及同域物种分布具有指示作用,掌握其栖息地适宜性及活动节律是恢复生物多样性的基础。于2022年6月—2023年5月在北极村国家级自然保护区采用样线调查和相机监测相结合的方法收集狍活动信息,通过随机布设方法在保护区内共布设35条样线和140台红外相机,并利用最大熵(maxEnt)栖息地建模及核密度估计法分析狍的栖息地适宜性与活动节律,结果表明:(1)maxEnt模型的ROC曲线评价结果的平均AUC值为0.839,能够较好的反映研究区域狍栖息地适宜性的实际分布情况;(2)研究利用的14个变量中,距离河流越远出现概率越低是影响狍栖息地选择的关键变量,贡献率达34%。其次针阔混交林、常绿针叶林、林间小路、海拔、草地和居民区是影响狍栖息地质量的次要变量;(3)保护区内狍适宜栖息地和次适宜栖息地面积分别为240.44km^(2)和490.64 km^(2),占研究区域总面积的17.48%和35.67%,主要分布于保护区中部和东部,西部适宜栖息地面积较少且破碎化较为严重;(4)活动节律分析表明,狍在9:00左右达到日活动高峰;不同季节狍活动节律存在差异,暖季狍活动节律具有晨昏性,冷季狍上午和下午的活动高峰期分别延迟和提前。基于研究结果提出以下保护建议:(1)加大保护区周边人类活动的管控力度,根据不同人为干扰强度针对性地对狍种群进行保护;(2)通过加强栖息地连通性管理、构建栖息地廊道等方法使破碎的栖息地连接成整体,促进保护区狍个体间交流。研究获得的结果为分布于我国最北端狍种群的保护与恢复提供了基础数据,对于推动该地区生物多样性保护具有重要意义。

关键词：有蹄类 maxEnt模型栖息地核密度估计

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CD4^(+)CD25^(+)foxp3^(+)调节性T细胞通过NKG2D增强急性髓性白血病中NK细胞毒性

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中华细胞与干细胞杂志（电子版） 2024年第4期14卷 212-219页

作者：薛春娥赵娟娟刘韦成张义亮马毓晗李迎巧河北廊坊市中医医院血液病科廊坊065000

目的CD4^(+)CD25^(+)foxp3^(+)调节性T细胞在急性髓性白血病中调控NKG2D介导NK细胞毒性的研究。方法免疫磁珠法分离急性髓性白血病(AML)和健康对照外周血NK细胞和CD4^(+)CD25^(+)细胞,分析foxp3与NKG2D表达,CD4^(+)CD25^(+)foxp3^(+)细胞的比例与NK细胞的细胞毒作用相关性。Spearman法分析CD4^(+)CD25^(+)foxp3^(+)细胞比例与NK细胞的细胞毒性和NGK2D相关性。foxp3过表达处理AML外周血淋巴细胞后,流式细胞术检测NKG2D,IFN-γ和CD107a表达,LDH法检测NK细胞毒性。GEPIA2数据库分析AML患者NKG2D和foxp3基因表达相关性,TCGA数据库分析AML转录组数据中与NKG2D表达高相关性基因。IL-2(10μg/mL),IL-15(10μg/mL)处理NK细胞24 h后,流式细胞术检测NKG2D和CD107a表达,酶联免疫反应法检测NK细胞分泌的IFN-γ,LDH法检测NK细胞毒性。采用t检验等方法统计分析组间差异及变量相关性。结果与对照比较,AML组NK细胞中NKG2D表达(平均荧光强度MFI:942.25±117.17比3245.28±367.43)降低(P<0.001)。foxp3表达与NKG2D呈正相关性(r=0.590,P<0.001),NKG2D表达百分数与外周血淋巴细胞中CD4^(+)CD25^(+)foxp3^(+)细胞的比例呈正相关(r=0.708,P=0.002),AML患者外周血NK细胞活力也与CD4^(+)CD25^(+)foxp3^(+)细胞的比例呈正相关(r=0.655,P=0.006)。与OE-NC比较,OE-foxp3组细胞中NKG2D的表达水平(MFI:2115.37±269.53比914.28±103.36)、杀伤能力(58.24%±3.17%比24.18%±2.35%)、NK细胞毒性评估指标CD107a(45.43%±1.28%比18.24%±1.49%)和IFN-γ水平(24.16%±1.17%比16.28%±0.95%)升高(P均<0.001)。TCGA数据分析发现,NKG2D表达与CD3G、IL-3、IL-2、CD3E、IL-10、IL-17、IL-7R、IL-15、EZH2等基因相关性较高,流式细胞术检测发现,与对照比较,IL-2和IL-15处理后NK细胞的表面受体NKG2D和CD107a表达、IFN-γ水平、NK细胞毒性均升高。结论AML外周血中,NK细胞表面受体NKG2D低于正常对照,其中CD4^(+)CD25^(+)foxp3^(+)调节性T细胞通过IL-2和IL-15影响NKG2D表达进而调控NK细胞毒性。

关键词：急性髓性白血病 NK细胞 NKG2D CD4^(+)CD25^(+)foxp3^(+) IL-2

A Facile Li_(2)TiO_(3) Surface Modification to Improve the Structure Stability and Electrochemical Performance of Full Concentration Gradient Li-Rich Oxides

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Energy & Environmental materials 2024年第3期7卷 41-48页

作者： Naifang Hu Yuan Yang Lin Li yuhan Zhang Zhiwei Hu Lan Zhang Jun ma Guanglei Cui Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Institute of materials Science and Engineering Ocean University of ChinaQingdao 266100China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China max Planck Institute for Chemical Physics of Solids Nothnitzer Strasse 40Dresden D-01187Germany CAS Key Laboratory of Green Process and Engineering Beijing Key Laboratory of Ionic Liquids Clean ProcessState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Shandong Energy Institute Qingdao 266101China

Full concentration gradient lithium-rich layered oxides are catching lots of interest as the next generation cathode for lithium-ion batteries due to their high discharge voltage,reduced voltage decay and enhanced rate performance,whereas the high lithium residues on its surface impairs the structure stability and long-term cycle ***,a facile multifunctional surface modification method is implemented to eliminate surface lithium residues of full concentration gradient lithium-rich layered oxides by a wet chemistry reaction with tetrabutyl titanate and the post-annealing *** realizes not only a stable Li_(2)TiO_(3)coating layer with 3D diffusion channels for fast Li^(+)ions transfer,but also dopes partial Ti^(4+)ions into the sub-surface region of full concentration gradient lithium-rich layered oxides to further strengthen its crystal ***,the modified full concentration gradient lithium-rich layered oxides exhibit improved structure stability,elevated thermal stability with decomposition temperature from 289.57℃to 321.72℃,and enhanced cycle performance(205.1 mah g^(-1)after 150 cycles)with slowed voltage drop(1.67 mV per cycle).This work proposes a facile and integrated modification method to enhance the comprehensive performance of full concentration gradient lithium-rich layered oxides,which can facilitate its practical application for developing higher energy density lithium-ion batteries.

关键词： full concentration gradient lithium-rich layered oxides structure stability surface modification

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橄榄葛根饮料的研制及其解酒作用研究

现代食品 2024年第17期30卷 104-108页

作者：马钰涵田林心田兴王露瑶向豪李嘉欣贵州中医药大学药学院贵州贵阳550025 贵州中医药大学药食两用资源研究与开发中心贵州贵阳550025

以药食两用植物橄榄和葛根为原料,研制一款功能饮料,并研究其解酒作用。以黄酮提取率为指标,通过单因素和正交试验研究原料的最佳提取工艺;以感官评价为指标,通过单因素试验对饮料的配方工艺进行优化;研究其理化性质和抗氧化能力,并通... 详细信息

以药食两用植物橄榄和葛根为原料,研制一款功能饮料,并研究其解酒作用。以黄酮提取率为指标,通过单因素和正交试验研究原料的最佳提取工艺;以感官评价为指标,通过单因素试验对饮料的配方工艺进行优化;研究其理化性质和抗氧化能力,并通过小鼠醉酒模型研究饮料的解酒作用。结果表明,最佳提取工艺为橄榄葛根料液比1∶10、温度90℃、浸提时间150 min;饮料的最佳配方为橄榄葛根提取液中添加8%白砂糖、0.8%白醋,制得饮料含可溶性固形物2.5%、pH值为4.16、糖度为3°Bx、黄酮含量为0.068mg·mL^(-1),风味独特,酸甜适中;该饮料有一定抗氧化能力和解酒作用,能够满足人们对健康生活的需求。

关键词：药食同源橄榄葛根饮料解酒作用

Health Effects of Extreme Low Temperatures and Cold Waves on Respiratory Diseases

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Biomedical and Environmental Sciences 2024年第6期37卷 682-685页

作者： Zongrui Liu Yuxia ma yuhan Zhao Wanci Wang Pengpeng Qin Jie Yang Bowen Cheng College of Atmospheric Sciences Key Laboratory of Semi-Arid Climate ChangeMinistry of EducationLanzhou UniversityLanzhou 730000GansuChina Minhe Meteorological Bureau Minhe 810800QinghaiChina

Climate change is the most significant threat to public health and exerts myriad influences on health,including the occurrence of extreme temperature *** have demonstrated that populations will experience significantl... 详细信息

关键词： extreme Effects events.

C-glycosylflavones from the leaves of Iris tectorum maxim.

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Acta Pharmaceutica Sinica B 2012年第6期2卷 598-601页

作者： yuhan ma Huan Li Binbin Lin Guokai Wang Minjian Qin Department of Resources Science of Traditional Chinese Medicines China Pharmaceutical UniversityNanjing 210009China State Key Laboratory of Natural Medicines China Pharmaceutical UniversityNanjing 210009China R&D Department of Jiangsu Honghui Medical Com.Ltd. Nanjing 210009China Department of General Surgery General Hospital of North China Petroleum Administration BureauRenqiu 062552China

A new C-glycosylflavone,5-hydroxyl-4′,7-dimethoxyflavone-6-C-[0-(α-L-3″-acetylrhamno-pyranosy)-1→2-β-D-glucopyranoside](1),along with five known C-glycosylflavones,5-hydroxy-4′,7-dimethoxyfavone-6-C-[0-(α-L-2′″-acetylrhamnopyranosy1)-1→2-β-D-glucopyranoside](2),embinin(3),embigenin(4),swertisin(5)and swertiajaponin(6)were isolated from the leaves of Iris tectorum *** structures were elucidated on the basis of extensive NM R experiments and spectral methods and their cytotoxic activities against A 549(lung cancer)human cell lines were determined.

关键词： Iris tectorum Iridaceae C-glycosylflavones Cytotoxic activities

基于共情理念的中国新叙事--出版业对外传播的一个深度理念问题

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出版发行研究 2022年第8期 65-70页

作者：郝雨马宇涵上海大学新闻传播学院

面对日益复杂的国际舆论形势,必须进一步拓展传播战略和言说对策。而从宏观层面和长远视野来看,应该系统构建当代中国的话语体系和叙事体系,用中国理论、中国话语阐释中国实践,以中国声音、中国故事展示中国形象,形成在国际传播中具有... 详细信息

面对日益复杂的国际舆论形势,必须进一步拓展传播战略和言说对策。而从宏观层面和长远视野来看,应该系统构建当代中国的话语体系和叙事体系,用中国理论、中国话语阐释中国实践,以中国声音、中国故事展示中国形象,形成在国际传播中具有中国特色的价值观念和理论表达。本文从共情传播的视角出发,通过分析当前跨文化传播的现实语境和全媒体融合格局的现实需求,以共情言说为阐释基点构建中国新叙事,精准传递中国新实践和国家新形象,尤其是具体到出版业,更具有规模传播的话语优势可以集中主题,打造经典。强调全球议题和中国话语的有机统一,以期为打造融通中外的新概念、新范畴、新表述提供一定的学理支撑。

关键词：中国叙事对外传播共情传播国家形象