从单纯表量到多元化表意--试论汉语历时发展中的"数量名"结构

"数量名"结构是汉语中最典型的表量短语结构。但在长期的语言发展过程中,在汉语特殊的语音形式和组织特点的条件下,这一结构形式的语义从初始的单纯表量走向了表意的多元化,其结构的内部关系也复杂多样起来,现已成为汉语中一种多功能的常规性句法结构。     

成都市住房投资与居民消费能力的实证分析

采用1978年至2003年成都市统计数据,引入单位根检验、协整检验和格兰杰因果检验等计量方法,分析了成都市住宅投资发展与居民消费能力增加之间的关系。这对于房地产投资具有一定参考意义。     

Bounded integrated processes and unit root tests

In the framework of integrated processes, the problem of testing the presence of unknown boundaries which constrain the process to move within a closed interval is considered. To analyze this problem, the concept of bounded integrated process is introduced, thus allowing to formally define boundary conditions for I(1) processes. A new class of tests, which are based on the rescaled range of the process, is introduced in order to test the null hypothesis of no boundary conditions. The limit distribution of the test statistics involved can be expressed in terms of the distribution of the range of Brownian functionals, while the power properties are obtained by deriving some asymptotic results for I(1) processes with boundary conditions. Both theoretical and simulation investigations show that range-based tests outperform standard unit root tests significantly when used to detect the presence of boundary conditions. A previous draft of the paper (Cavaliere, 2000) was presented at the 8th World Congress of the Econometric Society, Seattle, 11–16 August 2000. I wish sincerely to thank: Martin Jacobsen for his patience in discussing weak convergence to regulated Brownian motions and his valuable suggestions; the Department of Theoretical Statistics of the University of Copenhagen whose hospitality is gratefully acknowledged; Tommaso Proietti for important suggestions; Silvano Bordignon and partecipants at the CIdE seminar, University of Padua, June 2000; two anonymous referees. Partial financial support from 60% M.U.R.S.T. research grants is acknowledged.     

ASYMPTOTIC DISTRIBUTIONS OF SEASONAL UNIT ROOT TESTS: A UNIFYING APPROACH

This paper adopts a unified approach to the derivation of the asymptotic distributions of various seasonal unit root tests. The procedures considered are those of Dickey et al. [DHF], Kunst, Hylleberg et al. [HEGY], Osborn et al. [OCSB], Ghysels et al. [GHL] and Franses. This unified approach shows that the asymptotic distributions of all these test statistics are functions of the same vector of Brownian motions. The Kunst test and the overall HEGY F-test are, indeed, equivalent both asymptotically and in finite samples, while the Franses and GHL tests are shown to have equivalent parameterizations. The OCSB and DHF test regressions are viewed as restricted forms of the Kunst-HEGY regressions, and these restrictions may have non-trivial asymptotic implications.     

论四阶段教学法在《动物生产学》中的运用

本文针对我校《动物生产学》课程教学的现状及存在的问题,以单元模块循环式教学方法为主线,从整个教学环节中的教学方法、手段和考试方式方面,就《动物生产学》课程教学中如何将理论与实际紧密联系、将现代化的教学手段引入教学中,以充分调动学生的积极性,培养学生的综合素质和能力,提高专业课的教学效果和质量进行探讨,并提出具体的改革措施与施行方案。     

A comparison of alternative unit root tests

In this paper we evaluate the performance of three methods for testing the existence of a unit root in a time series, when the models under consideration in the null hypothesis do not display autocorrelation in the error term. In such cases, simple versions of the Dickey-Fuller test should be used as the most appropriate ones instead of the known augmented Dickey-Fuller or Phillips-Perron tests. Through Monte Carlo simulations we show that, apart from a few cases, testing the existence of a unit root we obtain actual type I error and power very close to their nominal levels. Additionally, when the random walk null hypothesis is true, by gradually increasing the sample size, we observe that p-values for the drift in the unrestricted model fluctuate at low levels with small variance and the Durbin-Watson (DW) statistic is approaching 2 in both the unrestricted and restricted models. If, however, the null hypothesis of a random walk is false, taking a larger sample, the DW statistic in the restricted model starts to deviate from 2 while in the unrestricted model it continues to approach 2. It is also shown that the probability not to reject that the errors are uncorrelated, when they are indeed not correlated, is higher when the DW test is applied at 1% nominal level of significance.     

对单位行贿罪的立法完善研究

对单位行贿罪是1997刑法中增设的罪名,其立法本身还有诸多亟待完善之处。本罪的罪名宜修改为对国有单位受贿罪。“为谋取不正当利益”应当是本罪两种行为方式的共同必备要件。本罪的立案标准也需修改,以实现刑法面前人人平等原则。对于本罪的刑事责任问题,一方面对犯本罪的自然人应当增设罚金刑,并宜采用倍比制罚金的立法方式;另一方面对自由刑的配置要增设量刑档次,以实现罪刑相均衡原则。     

基于PID技术的大型烘房温度控制系统

针对传统大型烘房温度控制不精确,自动化水平低的问题,设计了基于PID技术的大型烘房远程温度控制系统。 系统通过中心PC机设置PID控制器参数和目标温度,并将所设置参数传输到每个监控点的下位机上;下位机对所监控 区域的温度进行监控,并通过PID控制器进行调节,同时把所监控的温度信息上传给PC机。模拟实验的结果表明：系统 工作可靠,控制精度高,具有较高的自动化控制能力。     

体系性原则在刑法修改中的应用

体系性原则意味着将刑法视为一个有机体,刑法内部条文应具有一致性和互助性.依据体系性原则,刑法在协调性方面并不完善.总则与分则存在一定程度的背离,诸如介绍贿赂行为单独成罪是对共犯规定的排斥、个罪中单位犯罪处罚模式是对总则规定的重复、一般缓刑与分则战时缓刑存在矛盾.几乎所有章节中都存在罪名归类错误,这制约了对罪名的准确理解.个罪之间的协调性差,这在两个传播淫秽物品罪、行贿罪与对非国家工作人员行贿罪等罪名之间表现得尤为突出.刑法修改中体系性原则着眼于刑法条文之间的形式对应和实质沟通,致力于提升刑法的整体协调性.     

关于认沽权证怪象的实证分析

文章通过对当前我国权证市场认沽权证的客观数据的计算，认为认沽权证存在部分认沽权证价格逆势而动与正股价格的联动性弱、价格远远高估、溢价率偏高、时间衰减不正常的怪象。文章选择了5只不同产业的认沽权证，将其价格与其标的股票价格进行Granger因果检验。通过实证分析认为目前我国权证市场，认沽权证价格与各自标的股票价格间的传导机制并不健全，导致认沽权证价格的非理性波动。最后，文章对上述怪象进行了解释，并提出可行性建议。