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Spectral Characteristics of Wind-Waves in Laboratory

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China Ocean Engineering 1998年第2期13卷 183-190页

作者： lu, hm Xu, DL Yu, DY Ocean Univ Qingdao Phys Oceanog Lab Qingdao 266003 Peoples R China Ocean Univ Qingdao Coll Engn Qingdao 266003 Peoples R China

Spectral characteristics of wind-generated waves in labortaory are presented on the basis of a systematic measurement in a large-scale wind-wave channel and compared with those in the field. A marked characteristics of the measured spetra is the existence of secondary spectrum-peak. The dependence of spectral peak-frequency, peak-value and zeroth-order moment on wind speed and fetch are presented and found roughly similar to those in the field represented by the JONSWAP spectrum, regardless of the differences in coefficient. The spectral slope beta at high-frequencies are found somewhat greater than those of field wind-waves in both cases of deep and shallow waters. Except for the low-frequency part, the spectral forms measured in different wind conditions are similar and fit for the JONSWAP spectrum with gamma = 6 and beta = 5.5. Some relevant problems are discussed.

关键词： wind-wave channel spectral characteristics JONSWAP spectrum

The effect of retinoic acid on Ito cell proliferation and content of DNA and RNA

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World Journal of Gastroenterology 1999年第5期5卷 443-444页

作者： Gao ZL Li DG lu hm Gu XH Yangpu Cent Hosp Dept Gastroenterol Shanghai 200092 Peoples R China Shanghai Second Med Univ Dept Gastroenterol Shanghai 200090 Peoples R China

INTRODUCTIONThe development of liver fibrosis is due to an imbalance between synthesis and degradation of extracellular matrix. Recent studies have shown that Ito cells which are located along the sinuses of liver, can store and metabolize Vit A, and are the main cells that produce collagen, among which type Ⅰ, Ⅲ and Ⅳ and laminin, account for 80%-95% of the total hepatic collagen[1]. Ito cells in the course of proliferation and synthesis of collagen showed a reduction of Vit A contents and retinoic acid receptors[2]. This study was designed to investigate the effect of retinoic acid on Ito cell proliferation and the contents of DNA/RNA and to analyse further its mechanism or pathways.

关键词： liver fibrosis retinoic acid Ito cell cell culture microspectrophotometer DNA RNA

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汉防己甲素抗肝纤维化研究进展

世界华人消化杂志 1999年第2期7卷 171-172页

作者：李定国陆汉明陈颖伟上海第二医科大学附属新华医院

汉防己甲素（又称粉防己碱；Ｔｅｔｒａｎｄｒｉｎｅ；Ｔｅｔ）是从防己科千金藤属植物粉防己（ｓｔｅｐｈａｎｉａｔｅｔｒａｎｄｒａＳ．Ｍｏｏｒｅ）的块根中分离出的主要生物碱，其分子式为Ｃ３３Ｈ４２Ｎ２Ｏ６，化学结构属于双苄... 详细信息

汉防己甲素（又称粉防己碱；Ｔｅｔｒａｎｄｒｉｎｅ；Ｔｅｔ）是从防己科千金藤属植物粉防己（ｓｔｅｐｈａｎｉａｔｅｔｒａｎｄｒａＳ．Ｍｏｏｒｅ）的块根中分离出的主要生物碱，其分子式为Ｃ３３Ｈ４２Ｎ２Ｏ６，化学结构属于双苄基异喹啉类．现代药理研究证实，Ｔｅ...

关键词：肝硬化治疗病理学肝纤维化汉防己甲素

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Fas分子与肝细胞凋亡

世界华人消化杂志 1999年第6期7卷 531-532页

作者：魏红山李定国陆汉明上海第二医科大学附属新华医院

近年来细胞分子生物学领域中的两个重要进展，即细胞凋亡概念的提出和Ｆａｓ分子的分离与鉴定对肝病的研究有重要影响，加深了人们对肝细胞损伤与死亡的认识．１９９３年Ｏｇａｓａｗａｒａｅｔａｌ［１］进行的Ｆａｓ单抗毒性实验证实... 详细信息

近年来细胞分子生物学领域中的两个重要进展，即细胞凋亡概念的提出和Ｆａｓ分子的分离与鉴定对肝病的研究有重要影响，加深了人们对肝细胞损伤与死亡的认识．１９９３年Ｏｇａｓａｗａｒａｅｔａｌ［１］进行的Ｆａｓ单抗毒性实验证实了Ｆａｓ分子系统在肝细胞凋亡或损伤...

关键词：肝细胞凋亡肝病病理学 Fas

Microbiotas and environments of the Nansha Islands and adjacent sea

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Chinese Science Bulletin 1997年第20期42卷 1729-1737页

作者： Chen, MH Cai, hm Tu, X lu, LH Chinese Acad Sci S China Sea Inst Oceanol Guangzhou 510301 Peoples R China

IN the past 12 years, the Multidisciplinary Oceanographic Expedition Team to Nansha Islandsorganized by the Chinese Academy of Sciences has carried out many investigations and ob-tained a lot of scientific research results. In the present study, 177 surface sediments and 7core specimens were used for analyzing foraminifers, ostracods, radiolarians, bryozoans, gas-tropods, bivalves, diatoms, dinonagellates, sporopollen and calcareous nannoplankton, con-

关键词： Nansha Islands and adjacent sea micropaleontology paleoenvironmental change.

Periodic surface structures fabricated by one excimer laser pulse through a silica phase mask grating

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Chinese Science Bulletin 1997年第21期42卷 1787-1792页

作者： luo, GP Wu, hm Wang, M Zhu, SN lu, YQ Liu, ZG Wei, Y Ming, NB Nanjing Univ Natl Lab Solid State Microstruct Nanjing 210093 Peoples R China

RECENTLY, excimer laser devices, which have higher-energy density output in pulsed ultravio-let (UV) light (193 or 248 nm), have been employed to generate some thin film struc-tures. The principle of this technique, which is also called pulsed laser deposition (PLD)technique, is that the exposed material could be ablated out of the sample by the focusing laserbeam, and redeposit on a substrate to form thin-film structures under certain conditions. Onthe other hand, researchers have obtained high-quality Bragg gratings in photosensitive

关键词： excimer laser pulse phase mask grating periodic surface structures.

MUSCL TYPE SCHEMES AND DISCRETE ENTROPY CONDITIONS

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Journal of Computational Mathematics 1997年第1期15卷 72-80页

作者： Zhao, N Wu, hm NANJING UNIV DEPT AERODYNAMNANJING 210008PEOPLES R CHINA CHINESE ACAD SCI STATE KEY LAB SCI & ENGN COMPICMSECBEIJINGPEOPLES R CHINA

In this paper, the semi-discrete entropy conditions with so called the proper discrete entropy flux of a class of high resolution MUSCL type schemes are discussed for genuinely nonlinear scalar conservation laws. It is shown that the high resolution schemes satisfying such;semi-discrete entropy conditions cannot preserve second order accuracy in the rarefaction region.

关键词： Computational fluid dynamics Convergence of numerical methods Nonlinear equations Numerical methods

Perfect Matching in k-partite k-graphs and 3-uniform hm-bipartite Hypergraphs

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Acta Mathematicae Applicatae Sinica 2020年第3期36卷 636-641页

作者： Chun-qiu FANG Mei lu Department of Mathematical Sciences Tsinghua UniversityBeijing 100084China

Let H=(V,E)be an n-balanced k-partite k-graph with partition classes V1,...,*** for every legal(k-1)-tuple f contained in V\V1 and for every legal(k-1)-tuple g contained in V\Vk such that f∪g■E(H),we have d(f)+d(g)≥n+*** this paper,we prove that under this condition H must have a perfect *** result of this paper is about the perfect matching in 3-uniform hm-bipartite *** G be a 3-uniform hm-bipartite hypergraph with one of whose sides V1 has the size n,the another side V2 has size 2 *** for all the legal 2-tuple f with|f∩V1|=1 and for all the legal 2-tuple g with|g∩V1|=0,we have d(f)≥n-2 and d(g)>n/2,then G has a perfect matching.

关键词： Perfect matching k-partite k-graph hm-bipartite hypergraph

SELECTIVE　REDUCTION　OF　CLERODANE　DITERPENOIDS

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Chinese Chemical Letters 1996年第5期7卷 411-414页

作者： Chen, hm Min, ZD NANKAI UNIV INST ELEMENTOORGAN CHEMTIANJIN 300071PEOPLES R CHINA CHINA PHARMACEUT UNIV DEPT PHYTOCHEMNANJING 210008PEOPLES R CHINA

Abstract: The α,β-unsaturated γ-lactones of neo-clerodane diterpenoids teucvidin, teupernin E and ajugacumbin A were selectively transformed into saturated γ-lactones and unsaturated diol derivatives with NaBH4. These transformations are of interest due to their selective reduction as compared with catalytic hydrogenation and LiAlH4 reduction of these diterpenoid compounds.

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