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OSCILLATOrY SINGULAr INTEGrALS WITH VArIABLE rOUGH KErNEL, Ⅱ

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Analysis in Theory and Applications 2003年第1期19卷 1-13页

作者： tang lin and yang dachun ({4., china) tang lin and yang dachun Department of mathematics {4. beijing 100875 p. r. china beijing normal university Beijing China Department of mathematics Beijing Normal University Beijing 100875 China

Let n≥2. In this paper, the author establishes the L2 (rx)-boundedness of some oscillatory singular integrals with variable rough kernels by means of some estimates on hyper geometric functions and confluent hyper ge... 详细信息

关键词： oscillatory singular integral variable rough kernel

MAXIMAL FUNCTION CHArACTErIZATIONS OF HArDY SpACES ASSOCIATED WITH BOTH NON-NEGATIVE SELF-ADJOINT OpErATOrS SATISFYING GAUSSIAN ESTIMATES AND BALL QUASI-BANACH FUNCTION SpACES

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Acta Mathematica Scientia 2024年第2期44卷 484-514页

作者：林孝盛杨大春杨四辈袁文 Laboratory of mathematics and Complex Systems(Ministry of Education of china) School of Mathematical SciencesBeijing Normal UniversityBeijing100875China School of mathematics and Statistics Gansu Key Laboratory of Applied Mathematics and Complex SystemsLanzhou UniversityLanzhou730000China

Assume that L is a non-negative self-adjoint operator on L^(2)(ℝ^(n))with its heat kernels satisfying the so-called Gaussian upper bound estimate and that X is a ball quasi-Banach function space onℝ^(n) satisfying some mild *** HX,L(ℝ^(n))be the Hardy space associated with both X and L,which is defined by the Lusin area function related to the semigroup generated by *** this article,the authors establish various maximal function characterizations of the Hardy space HX,L(ℝ^(n))and then apply these characterizations to obtain the solvability of the related Cauchy *** results have a wide range of generality and,in particular,the specific spaces X to which these results can be applied include the weighted space,the variable space,the mixed-norm space,the Orlicz space,the Orlicz-slice space,and the Morrey ***,the obtained maximal function characterizations of the mixed-norm Hardy space,the Orlicz-slice Hardy space,and the Morrey-Hardy space associated with L are completely new.

关键词： Hardy space ball quasi-Banach function space Gaussian upper bound estimate non-negative self-adjoint operator maximal function

Biodegradation of polycyclic aromatic hydrocarbons in sediments from the Daliao river watershed, china

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Journal of Environmental Sciences 2009年第7期21卷 865-871页

作者： QUAN Xiangchun, tang Qian, HE Mengchang, yang Zhifeng, lin Chunye, GUO Wei State Key Joint Laboratory of Environmental Simulation and pollution Control, School of Environment, beijing normal university, {4., china. State Key Joint Laboratory of Environmental Simulation and pollution Control School of Environment Beijing Normal University Beijing 100875 China

The Daliao river, as an important water system in Northeast china, was reported to be heavily polluted by polycyclic aromatic hydrocarbons （pAHs）. Aerobic biodegradations of four selected pAHs （naphthalene, phenanthrene, fluorene and anthracene） alone or in their mixture in river sediments from the Daliao river water systems were studied in microcosm systems. Effects of additional carbon source, inorganic nitrogen and phosphorus, temperature variation on pAHs degradation were also investigated. results showed that the degradation of phenanthrene in water alone system was faster than that in water-sediment combined system. Degradation of phenanthrene in sediment was enhanced by adding yeast extract and ammonium, but retarded by adding sodium acetate and not significantly influenced by adding phosphate. Although pAHs could also be biodegraded in sediment under low temperature （5~C）, much lower degradation rate was observed. Sediments from the three main streams of the Daliao river water system （the Hun river, the Taizi river and the Daliao river） demonstrated different degradation capacities and patterns to four pAHs. Average removal rates （15 or 19 d） of naphthalene, phenanthrene, fluorene and anthracene by sediment were in the range of 0.062-0.087, 0.005-0.066, 0.008- 0.016 and 0-0.059 mg/（L.d）, respectively. As a result, naphthalene was most easily degraded compound, anthracene was the hardest one. In multiple pAHs systems, the interactions between pAHs influenced each pAH biodegradation.

关键词： biodegradation the Daliao river microcosm polycyclic aromatic hydrocarbon sediment

多线性算子在Herz型Hardy空间上的有界性

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数学学报（中文版） 2001年第5期44卷 861-868页

作者：唐林杨大春北京师范大学数学系北京100875

本文证明了Ｒｎ上奇异积分乘积之有限和的多线性算子是从ＨＫｑ１α１，ｐ１（Ｒｎ）×… ×ＨＫｑｋαｋ，ｐｋ（Ｒｎ）到ＨＫｑα，ｐ（Ｒｎ）有界的，如果它满足由目标空间所确定的直到一定阶的消失矩条件．这些多线性算子所满足的... 详细信息

本文证明了Ｒｎ上奇异积分乘积之有限和的多线性算子是从ＨＫｑ１α１，ｐ１（Ｒｎ）×… ×ＨＫｑｋαｋ，ｐｋ（Ｒｎ）到ＨＫｑα，ｐ（Ｒｎ）有界的，如果它满足由目标空间所确定的直到一定阶的消失矩条件．这些多线性算子所满足的消失矩条件，当αｊ≥０时也是必要的．而且，这里所考虑的奇异积分包括Ｃａｌｄｅｒｏｎ－Ｚｙｇｍｕｎｄ奇异积分及任意阶的分数次积分．

关键词：多线性算子 Calderón-Zygmund算子分数次积分乘子 Hardy空间奇异积分乘积 Herz空间

DEAD-box helicase 17(DDX17)protects cardiac function by promoting mitochondrial homeostasis in heart failure

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2774-2790页

作者： Mingjing Yan Junpeng Gao Ming Lan Que Wang Yuan Cao Yuxuan Zheng Yao yang Wenlin Li Xiaoxue Yu Xiuqing Huang lin Dou Bing Liu Junmeng Liu Hongqiang Cheng Kunfu Ouyang Kun Xu Shenghui Sun Jin Liu Weiqing {4. Xiyue Zhang Yong Man Liang Sun Jianping Cai Qing He Fuchou {4. Jian Li Tao Shen The Key Laboratory of Geriatrics Beijing Institute of GeriatricsInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing Hospital/National Center of Gerontology of National Health CommissionBeijing 100730China peking university Fifth School of Clinical Medicine Beijing 100730China Department of Laboratory Medicine Huashan HospitalShanghai Medical CollegeFudan UniversityShanghai 200040China Biomedical pioneering Innovation Center School of Life SciencesPeking UniversityBeijing 100871China Emergency Center Zhongnan Hospital of Wuhan UniversityWuhan 430071China Department of Cardiology Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China Graduate School of peking Union Medical College Beijing 100730China Department of Health Care Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China peking-Tsinghua Center for Life Sciences Academy for Advanced Interdisciplinary StudiesPeking UniversityBeijing 100871China Department of pathology and pathophysiology and Department of Cardiology at Sir run run Shaw Hospital Zhejiang University School of MedicineHangzhou 310058China Department of Cardiovascular Surgery Peking University Shenzhen HospitalShenzhen 518036China Experimental Technology Center for Life Sciences at beijing normal university Beijing 100875China

DEAD-box helicase 17(DDX17)is a typical member of the DEAD-box family with transcriptional cofactor *** DDX17 is abundantly expressed in the myocardium,its role in heart is not fully *** generated cardiomyocyte-specific Ddx17-knockout mice(Ddx17-cKO),cardiomyocyte-specific Ddx17 transgenic mice(Ddx17-Tg),and various models of cardiomyocyte injury and heart failure(HF).DDX17 is downregulated in the myocardium of mouse models of heart failure and cardiomyocyte ***-specific knockout of Ddx17 promotes autophagic flux blockage and cardiomyocyte apoptosis,leading to progressive cardiac dysfunction,maladaptive remodeling and progression to heart *** of DDX17 expression in cardiomyocytes protects cardiac function under pathological *** studies showed that DDX17 can bind to the transcriptional repressor B-cell lymphoma 6(BCL6)and inhibit the expression of dynamin-related protein 1(Drp1).When DDX17 expression is reduced,transcriptional repression of BCL6 is attenuated,leading to increased Drp1 expression and mitochondrial fission,which in turn leads to impaired mitochondrial homeostasis and heart *** also investigated the correlation of DDX17 expression with cardiac function and Drp1 expression in myocardial biopsy samples from patients with heart *** findings suggest that DDX17 protects cardiac function by promoting mitochondrial homeostasis through the BCL6-Drp1 pathway in heart failure.

关键词： DDX17 homeostasis cardiac

孔子何以颂“葛”——试析上博简《诗论》第16简的一个问题

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史学集刊 2006年第4期 7-12页

作者：晁福林北京师范大学历史学院北京 100875

上博简《诗论》第24.应当系联于第16简之后,简文的这段话,从语意上看,孔子是在解释“葛”何以被歌颂的原因。第24.开首的略有残缺的三个字应当读为“以蒙棘”。“蒙棘”之语见于《唐风·葛生》篇。此篇意蕴,曾长期被误解,独王夫之发... 详细信息

上博简《诗论》第24.应当系联于第16简之后,简文的这段话,从语意上看,孔子是在解释“葛”何以被歌颂的原因。第24.开首的略有残缺的三个字应当读为“以蒙棘”。“蒙棘”之语见于《唐风·葛生》篇。此篇意蕴,曾长期被误解,独王夫之发千古之矇,指出它是歌颂晋君关爱民众以成就霸业的诗篇。今得《诗论》相关简文印证,不仅使《葛生》诗意大白,而且对于认识孔子的仁学理论,也有重要启发。

关键词：孔子诗论《唐风》仁学

唐代史家对信史的追求——重读《唐会要·史馆杂录》

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史学集刊 2006年第4期 104-109页

作者：瞿林东北京师范大学史学理论与史学史研究中心北京 100875

中国古代史学在发展中,存在着直书与曲笔的斗争,这在官修史书中表现得尤为突出,而史馆又是这种斗争最为集中的地方。然而,历代正直的史家坚持直书的精神、追求信史的目标从未改变。《唐会要》中的《史馆·史馆杂录》所记的史事,反映了... 详细信息

中国古代史学在发展中,存在着直书与曲笔的斗争,这在官修史书中表现得尤为突出,而史馆又是这种斗争最为集中的地方。然而,历代正直的史家坚持直书的精神、追求信史的目标从未改变。《唐会要》中的《史馆·史馆杂录》所记的史事,反映了唐代史家追求信史目标的足迹,以及他们的操守和信念,给后人留下了深刻的启示。

关键词：唐代史家追求信史直书曲笔史馆

会通思想与历史编纂——论中国古代史学的一个特点和优点

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史学月刊 2010年第11期 5-14页

作者：瞿林东北京师范大学史学理论与史学史研究中心

'会通'思想作为一种古老的宏观考察社会历史变化的历史观念,经司马迁的深刻理解和《史记》的运用与彰显,在中国史学上产生了巨大而深远的影响。尤其是从中唐至元初五百年间几部不同撰述宗旨、不同体裁、不同内容的通史著作的面世,把会... 详细信息

'会通'思想作为一种古老的宏观考察社会历史变化的历史观念,经司马迁的深刻理解和《史记》的运用与彰显,在中国史学上产生了巨大而深远的影响。尤其是从中唐至元初五百年间几部不同撰述宗旨、不同体裁、不同内容的通史著作的面世,把会通思想发展到新的境界,使中国古代史学在通史撰述方面出现了异彩纷呈的局面,而马端临是评论这一宏大史学现象的第一人,他的史学批评方法论,至今仍有启示意义。

关键词：会通思想撰述宗旨撰述内容史书体裁史学批评方法论

BOUNDEDNESS OF GENErALIZEDCALDErON-ZYGMUND OpErATOrS

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Journal of Systems Science & Complexity 2002年第2期15卷 205-218页

作者： tang Canqin yang dachun Department of mathematics Beijing Normal University 北京 100875

Abstract. The authors introduce the (θ1,θ2)-type Calderon-Zygmund operators andthe operators with the semi-(θ, N) regular kernels, and study their boundedness on theweighted Lebesgue spacest the weighted weak Lebes... 详细信息

关键词： (θ1 θ2)-type Calderon-Zygmund operator semi(θ N) regular kernel Lebesguespace) weak Lebesgue space Hardy space weak Hardy space atom weight.