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Experience　in　and　Concerns　about　Contracting　out　Barren　Land　to　Individuals　for　Afforestation

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Forestry and Society Newsletter 1994年第1期 5-7页

作者： $$$$ li weichang

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An engineered lamellar bone mimicking full-scale hierarchical architecture for bone regeneration

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Bioactive Materials 2023年第9期27卷 181-199页

作者： Tao Yang Zhichao Hao Zhenzhen Wu Binxin Xu Jiangchen liu Le Fan Qinmei Wang Yanshan li Dongying li Sangzhu Tang Chuanzi liu weichang li Wei Teng Hospital of Stomatology Guanghua School of StomatologySun Yat-sen University and Guangdong Provincial Key Laboratory of StomatologyNo.56Lingyuan West RoadYuexiu DistrictGuangzhou510055China Department of Periodontology and Implantology Stomatological HospitalSchool of StomatologySouthern Medical UniversityGuangzhouChina Laboratory of Biomaterials Key Laboratory on Assisted CirculationMinistry of HealthCardiovascular DivisionThe First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina

Lamellar bone,compactly and ingeniously organized in the hierarchical pattern with 6 ordered scales,is the structural motif of mature *** hierarchical scale exerts an essential role in determining physiological behavior and osteogenic bioactivity of *** lamellar bone with full-scale hierarchy remains a longstanding ***,using bioskiving and mineralization,we attempt to engineer compact constructs resembling full-scale hierarchy of lamellar *** systematically investigating the effect of mineralization on physicochemical properties and bioactivities of multi-sheeted collagen matrix fabricated by bioskiving,the hierarchical mimicry and hierarchy-property relationship are *** prolongation of mineralization,hierarchical mimicry and osteogenic bioactivity of constructs are performed in a bidirectional manner,*** rising and then descending,which is supposed to be related with transformation of mineralization mechanism from nonclassical to classical *** mineralized 9 days can accurately mimic each hierarchical scale and efficiently promote *** analysis further reveals that this construct potently activates integrinα5-PI3K/AKT signaling pathway through mechanical and biophysical cues,and thereby repairing critical-sized bone *** present study provides a bioinspired strategy for completely resembling complex hierarchy of compact mineralized tissue,and offers a critical research model for in-depth studying the structure-function relationship of bone.

关键词： Full-scale hierarchy Lamellar bone Bioskiving Mineralization Integrinα5-PI3K/AKT signaling Pathway

Current Status and Countermeasures of Forestry Cooperative Organization in China

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Chinese Forestry Science and Technology 2007年第3期6卷 1-10页

作者： WANG Dengju li weichang GUO Guangrong Research Institute of Foresty Policy and lnformation Chinese Academy of Forestry Beijing100091P.R.China

From three different historical phases, the article summarizes the development process on forestry cooperative organizations in China since 1949, and analyses the types, functions and existing problems of current forestry cooperative organizations. Drawing on the experience of other countries for reference, the authors bring forward policy suggestions on facilitating the development of forestry cooperative organizations and strengthening standardized management.

关键词： forestry cooperative organization development history current status problem policy suggestion

A simplified ZOOM FFT algorithm in digital sonar

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Chinese Journal of Acoustics 1999年第2期18卷 97-104页

作者： li Qihu li weichang ZHAO Wenli(Institute of Acoustics, Academia Sinica Beijing 100080)

DEMON and LOFAR have been proved the powerful means in underwater acoustic signal processing, especially in weak signal detection and target noise classification. Sometimes one need to know the fine structure of frequency spectrum of received signal. It is necessary to take a very long data to get high frequency resolution. This is not always possible due to the hardware and software limitation. Zoom FFT is one of the trade-off consideration for solving high frequency resolution problem, if we are only focus on some special frequency bins. Previous discussions mainly bifurcate into two different representations, the Complex Modulation and Cascade FFT. The former one traditionally needs some kind of special treatments, such as the complex modulation, Lowpass filtering, down-sampling. While the latter achieves the same result by two cascade FFT, with necessary modifications in phase and amplitude, thus is feasible for real-time implementation. Based on some theoretical analysis, a relationship between the complex moduIation and cascade FFT has been described in this paper. In addition, the selection of parameters such as windows function, sample rate, overlap factor have been discussed. Finally, the algorithm is presented and some simulation results are illustrated

关键词： FFT A simplified ZOOM FFT algorithm in digital sonar

Important Contributions of National Traditional Culture in Forest Protection and Management

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Forestry and Society Newsletter 2002年第2期 5-9页

作者： li weichang (For more information,please contact Mr.li weichang,Chinese Academy of Forestry,Wan Shou Shan,Beijing,China,100091)

Human’s ancestor was originallya member of the tenthousand things of *** a long history after entering *** still maintainedharmony and equilibrium with ***,the highly developed moderntechnology and economy sent

关键词： village forests creation entering things custom regulations ethnic mankind ceremony

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高自觉写作游戏玩家--路内印象记

扬子江文学评论 2022年第5期 16-19页

作者：李伟长上海文艺出版社

一在书名确定为《关于告别的一切》之前,路内多次和我讲起过这个题材,说要写一个色彩斑斓的长篇爱情小说。我自然表示狐疑,虽然路内曾经写过一个短篇小说,标题叫《色情狂编年史选》,内容也的确文采斑斓,但那毕竟是一个短篇,要写成一部... 详细信息

一在书名确定为《关于告别的一切》之前,路内多次和我讲起过这个题材,说要写一个色彩斑斓的长篇爱情小说。我自然表示狐疑,虽然路内曾经写过一个短篇小说,标题叫《色情狂编年史选》,内容也的确文采斑斓,但那毕竟是一个短篇,要写成一部长篇小说还是有难度的,除非路内对此蓄谋已久,拿短篇来练练手感。还有就是路内笔下的爱情多是清澈又温文尔雅的,寄藏着文学青年心中爱的火焰,也携带着文学青年的纯真无邪,和色彩斑斓不是一回事儿。路内得意地狡黠一笑,说那你就等着瞧吧。

关键词：爱情小说游戏玩家蓄谋已久文学青年路内印象记自觉写作编年史

A new algorithm of background equalization in digtal sonar

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Chinese Journal of Acoustics 1999年第3期18卷 211-216页

作者： li Qihu PAN Xuebao li weichang LUO Ensheng (Institute of Acoustics, Chinese Academy of Sciences Beijing 100080)

Background equalization technique has been extensively studied in the field of fre quency spectrum analysis. It has been proved an effective method to improve line spectrum extraction. In a multi-beam digital sonar system, the time/bearing display is the most im portant interface between signal processing module and console module. It has been proved that the system gain is often lost in the illterface between these two modules. Background equalization technique can improv the overall performance of the time/bearing display win dow. The result of post processing of multi-beam data is filtered each time before displayed in screen. It is shown that the algorithm of median value filtering combined with OTA (Order Truncate Average) method is an efficient technique to equalize the non-uniform, non-stationary background data. A variable length of window is adopted to match the different width of main lobe of beam patterns. The results of system simulation show that the algorithm described in this paper is efficient in the case that the background of multi-beam data is not uniform

关键词： A new algorithm of background equalization in digtal sonar

政治、伦理、游戏——茨威格小说《象棋的故事》的多种解读

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南京师范大学文学院学报 2018年第2期 101-107页

作者：李伟长南开大学文学院天津300071

茨威格小说《象棋的故事》内涵丰富,既是人物传奇,也涉及时代历史,而小说的核心是关于疯狂的故事。小说主人公B博士疯狂的原因有多种解读,如常见的反法西斯主题,对现实政治的寓意。而从作者对于象棋(小说)结局的精心安排,则可以发现西... 详细信息

茨威格小说《象棋的故事》内涵丰富,既是人物传奇,也涉及时代历史,而小说的核心是关于疯狂的故事。小说主人公B博士疯狂的原因有多种解读,如常见的反法西斯主题,对现实政治的寓意。而从作者对于象棋(小说)结局的精心安排,则可以发现西方文化与中国文化传统对于悲剧精神不同的理解,显示出深藏在西方人文传统中的伦理趋向;而从游戏观的维度介入文本,则打开了文本分析的新视域,象棋作为一种游戏,串联起了小说的发展,决定了人与事的运动轨迹。

关键词：《象棋的故事》历史文本化寓言悲剧精神游戏

理解一个抒情者——路内小说空间的困守和逃脱

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南方文坛 2019年第6期 53-56,58页

作者：李伟长上海文艺出版社

一小说家路内在《慈悲》中写了一种气味,它从一家苯酚厂散发出来,随风弥漫于整个工厂,让人“在冬天脑袋都在发胀”。它具有极强的穿透性,“苯酚车间在宿舍的东南边,夏天刮东南风,苯的气味向着江岸飘去。冬天刮风下雨,所有人都紧闭窗户... 详细信息

一小说家路内在《慈悲》中写了一种气味,它从一家苯酚厂散发出来,随风弥漫于整个工厂,让人“在冬天脑袋都在发胀”。它具有极强的穿透性,“苯酚车间在宿舍的东南边,夏天刮东南风,苯的气味向着江岸飘去。冬天刮风下雨,所有人都紧闭窗户。宿舍很破,苯的气味仍然从窗缝里钻进来”。这气味只是工厂众多味道的一种,还有工厂机器停休时,扑面而来的原材料味道,那是臭骨头腐烂的臭味,“腐尸的气味,从原料仓库飘出来、蒸出来、涌出来,到处都是”。

关键词：《慈悲》穿透性腐尸气味困守路内抒情宿舍