一类带有时滞的神经网络一致稳定性判别法

讨论带有时滞神经网络一致稳定性的问题,给出了状态函数与输出函数关于平衡点一致稳定、全局一致渐近稳定性等价性定理及判别方法。     

Land‐Price Dynamics and Macroeconomic Fluctuations

We argue that positive co‐movements between land prices and business investment are a driving force behind the broad impact of land‐price dynamics on the macroeconomy. We develop an economic mechanism that captures the co‐movements by incorporating two key features into a DSGE model: We introduce land as a collateral asset in firms' credit constraints, and we identify a shock that drives most of the observed fluctuations in land prices. Our estimates imply that these two features combine to generate an empirically important mechanism that amplifies and propagates macroeconomic fluctuations through the joint dynamics of land prices and business investment.     

如何提高巧实力和整体外交能力——基于机会成本和边际效应的视角

国际政治中对于权力内涵的认识是一个不断演进的过程,从国家实力到硬实力、软实力,再到巧实力。这不仅反映了国际体系的变化和发展,也意味着一国整体外交能力建设应该不断纳入新的因素。但如何优化组合这些因素,以提升一国的巧实力和整体外交能力,目前尚缺乏明确的原则。经济学中的机会成本和边际效应,包括消费的边际效用递减效应和生产要素投入边际产出递减效应等视角,可以在确定外部挑战和机遇、加强整体外交能力的软硬实力基础,以及提升巧实力方面发挥重要指导作用。     

缮写、模勒、板印——由《白氏文集》流传看抄印转换与文学发展的关系

元、白在传播效应中看到了自身的价值,有意识利用石刻拓印、木板雕印等各种复制手段,提升传播效应.从九世纪中叶到十世纪末,书籍处于抄印并行阶段,印本生产以官方与寺院为主体,多为实用类或宗教类宣传品,文人别集以抄写为主,全集流传不广,文集的形态也不稳定.白居易在世时,流行于世的多为元和时形成的小集与元白唱和集,五十岁后的作品多不为人知.书籍生产商品化推进了印刷技术普及化,也带来了全集流行的时代,《白氏文集》初刊于宋初,是对多种抄本编辑的结果,固化了白集形态,与抄卷原始形态多有不同.印本降低了文集制作的成本,推动了私人全集的流行,改变了作者的创作观念与阅读者的批评理念.     

AIDS in China

Although 10,676 people were officially reported to be infected with HIV on China's mainland by the end of June 1998, experts estimate that more than 300,000 Chinese are actually infected with HIV in China. They also believe HIV continues to spread in alarming fashion. Two thirds of reported HIV infection cases live in rural China, and nearly one third of the 301 people diagnosed as having AIDS have died. About 10% of all HIV infections occurred among teenagers under age 19 years old, with most infected through IV drug use. 60% of teens who responded to a survey in 1997 did not possess correct basic knowledge about AIDS, and 21% did not know how to protect themselves from contracting HIV.     

冷轧宽带钢连续退火炉与罩式退火炉的比较研究

在概述了罩式退火炉和连续退火炉的基础上,从带钢品种、性能、生产三方面对罩式退火炉和连续退火炉作了分析比较.     

基于碳排放视角的区域效率及其影响因素分析——低碳城市的一个测度

低碳城市建设是当前中国城市发展的重要课题,而城市低碳经济发展水平的测度则是其中的一个重要环节。本文基于碳排放视角,选择代表性国家(地区)和城市样本进行比较研究,将碳排放数量这一非期望产出变量作为投入进行处理,在科学设计DEA计量模型基础上,通过对区域整体效率及其影响因素进行实证分析,实现对低碳城市建设水平的测度,并据此进行结论分析,研究提出若干启示性建议。     

拉达克王国：公元950-1842年（九）——拉达克政府及其施政

本文利用有限的资料,从国家体制、行政机构、财政、税收、商贸、邮政等方面论述了拉达克王国的管理体系。     

Error Bands for Impulse Responses

We show how correctly to extend known methods for generating error bands in reduced form VAR's to overidentified models. We argue that the conventional pointwise bands common in the literature should be supplemented with measures of shape uncertainty, and we show how to generate such measures. We focus on bands that characterize the shape of the likelihood. Such bands are not classical confidence regions. We explain that classical confidence regions mix information about parameter location with information about model fit, and hence can be misleading as summaries of the implications of the data for the location of parameters. Because classical confidence regions also present conceptual and computational problems in multivariate time series models, we suggest that likelihood-based bands, rather than approximate confidence bands based on asymptotic theory, be standard in reporting results for this type of model.     

江南僧诗的现世情怀及其逻辑关联

僧诗的内容大多与清逸生活、与阐发释理,与水边林下气象有关,蔬笋气是其最常见的评价。但,不少江南僧诗渗透了心系苍生的情感,体现了弘扬正义的担当,且经常有情的悲歌,爱的欢唱,具有深厚的现世情怀。江南僧诗的这些别样抒写,有其内在的逻辑关联。佛教相关原义和援儒入佛的双重作用,使江南诗僧有了现世情怀的理论依据;良好的儒家文化素养,使他们能自觉地表达生命关怀,并能切中社会病害;身处寺院而不与世隔绝,放下功名却热衷与士大夫往来,使他们能敏锐地感受世俗社会的炎凉,及时关注现实世界的焦点;江南社会经济结构变迁导致的佛教世俗化、市民化,使世俗生活全方位地进入他们的视野。