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Regulating the key performance parameters for Hg-based IR NLO chalcogenides via bandgap engineering strategy

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Chinese Chemical Letters 2024年第10期35卷 490-494页

作者： A-Yang Wang sheng-hua Zhou Mao-Yin Ran Xin-Tao Wu hua Lin Qi-Long Zhu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences(CAS)Fuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China College of Chemistry Fuzhou UniversityFuzhou 350108China University of Chinese Academy of Sciences Bejing 100049China

Recently,non-centrosymmetric(NCS)Hg-based chalcogenides have garnered significant interest due to their strong second-harmonic-generation intensities(deff),making them attractive candidates for infrared nonlinear optical(IR-NLO)***,achieving both wide band gaps(Eg)and large phasematched deffsimultaneously in these materials remains a challenge due to their inherent constraints on each *** this research,we have successfully obtained two quaternary NCS Hg-based chalcogenides,Rb2HgGe_(3)S_(8)and Cs_(2)HgGe_(3)S_(8),by implementing a bandgap engineering strategy that involves alkali metal introduction and Hg/Ge ratio *** compounds consist of 2D[Hg Ge_(3)S_(8)]_(2)–anionic layers made of 1D[HgGeS_(6)]^(6–)chains and dimeric[Ge_(2)S_(6)]_(4–)polyhedra arranged alternately,and the charge-balanced Rb+/Cs+cations located between these ***,Rb_(2)HgGe_(3)S_(8)and Cs_(2)HgGe_(3)S_(8)exhibit overall properties required for promising IR-NLO materials,including sufficient PM deff(0.55–0.70×AgGaS_(2)@20_(5)0 nm),large Eg(3.27–3.41 e V),giant laser-induced damage thresholds(17.4–19.7×AgGaS_(2)@1064 nm),broad optical transmission intervals(0.32–17.5μm),and suitable theoretical birefringence(0.069–0.086@2050 nm).Furthermore,in-depth theoretical analysis reveals that the exceptional IRNLO performance is attributed to the synergy effects of distorted[HgS_(4)]and[GeS_(4)]*** study provides a useful strategy for enhancing the Eg and advancing Hg-based IR-NLO materials,which is expected to extended and implemented in other chalcogenide systems.

关键词： Hg-based chalcogenides IR nonlinear material Structure-activity relationship Wide energy gap Bandgap engineering strategy

Efficacy and safety of Yangxinshi tablet for chronic heart failure:A systematic review and meta-analysis

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World Journal of Clinical Cases 2024年第13期12卷 2218-2230页

作者： sheng-hua Lu Yun-Feng Yu Si-Si Dai Ya-Qi Hu Jian-He Liu The First Clinical College of Chinese Medicine Hunan University of Chinese MedicineChangsha 410007Hunan ProvinceChina Branch of National Clinical Research Center for Chinese Medicine Cardiology The First Hospital of Hunan University of Chinese MedicineChangsha 410007Hunan ProvinceChina

BACKGROUND The specific benefits of Yangxinshi tablet(YXST)in the treating chronic heart failure(CHF)remain *** To systematically evaluate the efficacy and safety of YXST in the treatment of *** Randomized controlled trials(RCTs)investigating YXST for CHF treatment were retrieved from eight public databases up to November ***-analyses of the included clinical studies were conducted using Review Manager *** Twenty RCTs and 1845 patients were *** meta-analysis results showed that the YXST combination group,compared to the conventional drug group,significantly increased the clinical efficacy rate by 23%[relative risk(RR)=1.23,95%CI:1.17-1.29],(P<0.00001),left ventricular ejection fraction by 6.69%[mean difference(MD)=6.69,95%CI:4.42-8.95,P<0.00001]and 6-min walk test by 49.82 m(MD=49.82,95%C:38.84-60.80,P<0.00001),and reduced N-terminal pro-Btype natriuretic peptide by 1.03 ng/L[standardized MD(SMD)=-1.03,95%CI:-1.32 to-0.74,P<0.00001],brain natriuretic peptide by 80.95 ng/L(MD=-80.95,95%CI:-143.31 to-18.59,P=0.01),left ventricular end-diastolic diameter by 3.92 mm(MD=-3.92,95%CI:-5.06 to-2.78,P<0.00001),and left ventricular endsystolic diameter by 4.34 mm(MD=-4.34,95%CI:-6.22 to-2.47,P<0.00001).Regarding safety,neither group reported any serious adverse events during treatment(RR=0.54,95%CI:0.15-1.90,P=0.33).In addition,Egger's test results indicated no significant publication bias(P=0.557).CONCLUSION YXST effectively improves clinical symptoms and cardiac function in patients with CHF while maintaining a favorable safety profile,suggesting its potential as a therapeutic strategy for CHF.

关键词： Yangxinshi tablet Chronic heart failure Cardiac function Systematic evaluation Meta-analysis

Laser-rewritable room temperature phosphorescence based on in-situ polymerized tartaric acid

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Science China Chemistry 2024年第9期67卷 3029-3038页

作者： Tuo-Yu Zhou Tai-Wen Li Hai-Fu Zhang Rui-Lin Chai Qian Zhao Penglin Zhang Guang-Yue Li Qian-Wen Wang Chang Li Yu Shu Zhi Fan sheng-hua Li College of Chemical Engineering and Materials Science College of SciencesTianjin University of Science&TechnologyTianjin 300457China College of Chemical Engineering North China University of Science and TechnologyTangshan 063210China Tianjin Key Laboratory of Multiplexed Identification for Port Hazardous Chemicals Tianjin University of Science&TechnologyTianjin 300457China

Organic room temperature phosphorescence(RTP)materials have potential applications in information technology and ***,the precise control of the afterglow in reversible manners remains challenging for organic ***,we report a kind of organic RTP material fabricated by simple heating mixtures of tartaric acid(TA)and aromatic acids,which can switch their phosphorescence by *** mixtures show tunable phosphorescence from indigo to orange with phosphorescence efficiency of up to 53.99% due to locking different organic luminogens by the TA-formed matrix through the noncovalent *** afterglow of those materials lasts a few seconds and disappears by water fumigation,which can be repeated in response to wet/heat *** drop-casting those materials on glass slides,a laser-repatternable phosphorescence is achieved by facile laser direct writing and quenched by water *** results open the opportunity for the design of smart stimuli-responsive phosphorescence materials from sustainable natural products.

关键词： room temperature phosphorescence tunable afterglows tartaric acid laser direct writing stimuli-response

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基于多示例学习图卷积网络的隐写者检测

自动化学报 2024年第4期50卷 771-789页

作者：钟圣华张智深圳大学计算机与软件学院深圳518060 香港理工大学电子计算学系中国香港999077

隐写者检测通过设计模型检测在批量图像中嵌入秘密信息进行隐蔽通信的隐写者,对解决非法使用隐写术的问题具有重要意义.本文提出一种基于多示例学习图卷积网络(Multiple-instance learning graph convolutional network,MILGCN)的隐写... 详细信息

隐写者检测通过设计模型检测在批量图像中嵌入秘密信息进行隐蔽通信的隐写者,对解决非法使用隐写术的问题具有重要意义.本文提出一种基于多示例学习图卷积网络(Multiple-instance learning graph convolutional network,MILGCN)的隐写者检测算法,将隐写者检测形式化为多示例学习(Multiple-instance learning, MIL)任务.本文中设计的共性增强图卷积网络(Graph convolutional network, GCN)和注意力图读出模块能够自适应地突出示例包中正示例的模式特征,构建有区分度的示例包表征并进行隐写者检测.实验表明,本文设计的模型能够对抗多种批量隐写术和与之对应的策略.

关键词：图像隐写者检测图卷积网络多示例学习示例包表征

Variations in evaporation from water surfaces along the margins of the Badain Jaran Desert over nearly 60 years and influencing factors

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Journal of Groundwater Science and Engineering 2024年第3期12卷 253-263页

作者： Li-juan Wang Zhe Wang Gao-lei Jiang Zhen-long Nie Jian-mei Shen sheng-hua Song Insttute of Hydrogeology and Environmental Gelogy Chinese Academy of Geological SciencesShijiazhuang 05006China Technology innovation Center for Geothermal and Hot Dry Rock Exploration and Development Ministry of Natural ResourcesShjiazhuang 050061China Key Laboratoryof Quaternary Chronology and Hydrological Environmental Evolution China Geological SurveyShjiazhuang 0006 China

Based on meteorological data collected over nearly 60 years(1960-2017)from four national meteorological stations along the margins of the Badain Jaran Desert,this study analyzed the spatiotemporal variations in evaporation from water surfaces and identified the dominant controlling *** used included linear trend analysis,linear tendency estimation,the departure method,the rank correlation coefficient-based method,and Multiple Linear Regression(MLR).Results indicate notable spatiotemporal differences in evaporation distribution and ***,average annual evaporation exhibited a pronounced altitude effect,decreasing at a rate of about 8.23 mm/m from east to west with increasing ***,annual evaporation showed significant upward trends after 1996 at the northeastern(Guaizi Lake)and western(Dingxin)margins,with rates of 132 mm/10a and 105 mm/10a,***,along the northwestern(Ejina Banner)and southern(Alxa Right Banner)margins of the desert,an evaporation paradox was observed,with annual evaporation trending downward at rates of 162 mm/10a and 187 mm/10a,respectively,especially after *** dominant factors controlling evaporation varied spatially:Average annual temperature and relative humidity influended the western margin(Dingxin),average annual temperature was the key factor for the northeastern margin(Guaizi Lake),and average wind speed was crucial for the northern(Ejina Banner)and southern(Alxa Right Banner)margins.

关键词： Evaporation from water surface Evaporation paradox Dominant controlling factor Variation trend

经典名方清胃散物质基准特征图谱及指标成分含量测定研究

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南京中医药大学学报 2024年第1期40卷 37-46页

作者：曹杰楠李思盛华南京中医药大学药学院江苏南京210023 江阴天江药业有限公司江苏无锡214400 南京大学医学院附属金陵医院江苏南京210002

目的建立经典名方清胃散物质基准的HPLC特征图谱以及含量测定方法,控制其质量以保证后续制备。方法遵循古籍并结合前期制备工艺的考察,制备15批清胃散物质基准,采用HPLC建立物质基准特征图谱,使用中药色谱指纹图谱相似度评价系统(2012版... 详细信息

目的建立经典名方清胃散物质基准的HPLC特征图谱以及含量测定方法,控制其质量以保证后续制备。方法遵循古籍并结合前期制备工艺的考察,制备15批清胃散物质基准,采用HPLC建立物质基准特征图谱,使用中药色谱指纹图谱相似度评价系统(2012版)计算相似度;将5种药材中的7种指标性成分作为清胃散物质基准含量测定指标,建立其HPLC含量测定方法,并对15批样品进行含量测定。结果特征图谱相似度均≥0.975,标定了13个共有峰,对7个共有峰进行了化学成分指认,分别为梓醇(1号峰)、阿魏酸(5号峰)、异阿魏酸(6号峰)、盐酸小檗碱(7号峰)、盐酸巴马汀(8号峰)、丹皮酚(12号峰)、藁本内酯(13号峰)。建立了2套指标性成分含量测定方法,其一测定了梓醇、阿魏酸、异阿魏酸、丹皮酚的含量,规定了4种成分含量应分别在1.48~2.76、0.14~0.26、0.48~0.90、1.72~3.19 mg·g^(-1)之间;其二测定了盐酸黄连碱、盐酸巴马汀、盐酸小檗碱的含量,规定了3种成分含量应分别在0.65~1.21、0.57~1.07、1.86~3.45 mg·g^(-1)之间。结论通过清胃散物质基准特征图谱及含量测定方法建立了清胃散物质基准的质量控制方法,该方法简单可靠,为后续质量控制及制剂开发提供依据及基础。

关键词：清胃散物质基准特征图谱指标性成分含量测定

经济政策不确定性的产出时变效应研究——基于企业家信心视角的分析

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技术经济与管理研究 2024年第5期 57-63页

作者：刘杰王胜华中国财政科学研究院北京100142

随着国内外环境日益复杂,我国经济政策不确定性加大,对企业家信心和经济产出带来重大影响。基于2002年第1季度—2021年第3季度我国经济政策不确定性指数和企业家信心指数,运用时变参数向量自回归模型(TVP-VAR)分析经济政策不确定性与企... 详细信息

随着国内外环境日益复杂,我国经济政策不确定性加大,对企业家信心和经济产出带来重大影响。基于2002年第1季度—2021年第3季度我国经济政策不确定性指数和企业家信心指数,运用时变参数向量自回归模型(TVP-VAR)分析经济政策不确定性与企业家信心的产出效应及阶段性特征。结果表明:经济政策不确定性对经济产出的影响具有显著的时变特征,经济政策不确定性提高,在短期内对经济产出具有较强的抑制作用,长期影响较弱,且不同发展阶段的影响存在显著差异。企业家信心的高涨能够促进产出增长,影响程度为先增强后减弱;但经济政策不确定性提高会影响企业家对经济运行的当期理性认可成分和未来预期成分,从而对企业家信心产生负向冲击。以上研究结论为加强预期管理、完善政策调控体系、提高经济政策有效性、促进产出增长提供了理论和经验依据。

关键词：经济政策不确定性企业家信心经济产出经济波动

规范与失范:注释序号在学术期刊正文中的标注位置检讨

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青海师范大学学报（社会科学版） 2024年第4期46卷 155-164页

作者：蒲生华青海师范大学学报编辑部青海西宁810008

目前,在中华人民共和国国家标准及行业标准中对期刊引文、注释、参考文献等作了详细而科学的规范,但这些相关标准对正文中注释序号与引文末尾标点符号的先后位置关系未能作出严格而明确的规定。对这一细节的语焉不详和含混笼统,使得学... 详细信息

目前,在中华人民共和国国家标准及行业标准中对期刊引文、注释、参考文献等作了详细而科学的规范,但这些相关标准对正文中注释序号与引文末尾标点符号的先后位置关系未能作出严格而明确的规定。对这一细节的语焉不详和含混笼统,使得学术期刊在处理此问题时未能形成一个统一标准,以致出现不同学术期刊在注释序号的标注位置问题上各执一端、自成标准,甚至同一学术期刊在不同篇章中出现标准迥异的“混乱”现象。在学术期刊编辑过程中,对正文中注释序号与引文末尾标点符号的位置关系,国家标准的规范和不同学术期刊执行标准的失范,二者并存。如果不解决这一问题,会带来读者对行文内容理解出现偏差等一系列负面效应。因而,注释序号在正文中具体标注位置的规范势在必行。若要制定科学而可行的相关规定,厘清引用信息在正文中的起讫范围最为关键,它是决定注释序号在正文中具体标注位置的必然条件和基本原则。

关键词：注释序号学术期刊国家标准期刊编辑

基于广泛靶向代谢组学的何首乌块根和叶片代谢物差异分析

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中国中药杂志 2024年第13期49卷 3484-3492页

作者：王嘉赵玉姣彭华胜安徽中医药大学药学院安徽合肥230012 中国中医科学院中药资源中心北京100700 安徽省中药研究与开发重点实验室安徽合肥230012

为揭示何首乌叶片与块根中代谢物的种类与相对含量差异,提高何首乌资源的综合利用率,采用UPLC-MS/MS广泛靶向代谢组学的方法对何首乌的块根与叶片中的代谢物成分进行检测,并结合主成分分析、层次聚类分析和正交偏最小二乘法判别分析,筛... 详细信息

为揭示何首乌叶片与块根中代谢物的种类与相对含量差异,提高何首乌资源的综合利用率,采用UPLC-MS/MS广泛靶向代谢组学的方法对何首乌的块根与叶片中的代谢物成分进行检测,并结合主成分分析、层次聚类分析和正交偏最小二乘法判别分析,筛选何首乌叶片与块根间的差异代谢物。结果表明,何首乌叶片和块根中共检测到15类1942种代谢物,在块根中有1861种,叶中有1901种,1820种为两者共有,数量上以酚酸、黄酮、氨基酸及衍生物和生物碱为主;从两者中共筛选得到1200个差异代谢物,占共有代谢物的65.9%,其中有813种在叶片中含量显著高于块根,387种在块根中含量显著高于叶片;黄酮类代谢物在两者中检测数量最多且差异最显著,而茋类及蒽醌类主要药效成分在块根显著富集。根据差异代谢物KEGG通路富集结果,主要在黄酮和黄酮醇生物合成通路和亚油酸代谢通路中显著富集。该研究发现何首乌中含有丰富的代谢物,叶片与块根代谢成分种类相似,但含量存在较大差异,研究结果对何首乌资源的开发与利用提供一定的理论指导。

关键词：何首乌块根叶片广泛靶向代谢组学差异代谢物