增算子不动点定理及其应用

本文建立了若干新的增算子不动点存在定理,作为应用,作者研究了在Banach空间中一类含间断项Volterra积分方程解的存在性,我们的结果改进和推广了诸多已知结果。     

1997早稻长秧龄旱育“壮杆足穗”栽培技术

本文对早稻长秧龄旱育“壮杆足穗”栽培技术进行了概括和论证：“壮苗”是壮杆足穗的基础;“足穗”是决定高产的第一因素;“壮杆”是高产的重要保证：“增粒壮籽”是壮秆足穗的最终的目标。     

浅析农民增收的科技创新机制

文章通过对农业科技进步贡献率的逐年增加与农民人均收入增收率的逐年减少的不正常现象的分析,充分肯定依靠科技创新发展农村经济、建设现代化农业和增加农民收入,是解决"三农问题"的重要举措,指出为"农民增收"而实施科技创新的专项研究的重要性,以及为农民增收实施科技创新必须注意的几个问题。     

Some preservation results of NBUC aging property with applications

This paper develops a new characterization of NBUC aging property, and investigates its preservation properties both under monotonic anti-star-shaped transformations and under the non-homogeneous Poisson shock models.     

理性批判推动科学进步--浅探波普的科学知识增长论

如何才能促进知识的增长呢?波普强调理性的批判精神是推动科学知识增长和进步的最大动力。他认为任何理论都是一种“假设”或“猜测”,只有在反驳中才能得到进步。他提出了反归纳法、证伪原则和“猜测与反驳”的知识增长模式。他的科学方法论弥补了逻辑经验主义的某些不足,同时也带有机械性和脱离科学发展的倾向。     

促进农民增收的一种有效方式--浅析农户小额信用贷款的绩效

文章主要分析农户小额信用贷款在其推广过程中所产生的绩效,阐明农户小额信用贷款是促进农民增收的一种有效方式,充分肯定农村金融在农村经济发展中的能动作用.     

LIMIT THEOREMS FOR ASYMPTOTICALLY MINIMAX ESTIMATION OF A DISTRIBUTION WITH INCREASING FAILURE RATE UNDER A RANDOM MIXED CENSORSHIP/TRUNCATION MODEL

ABSTRACT

The search for optimal non-parametric estimates of the cumulative distribution and hazard functions under order constraints inspired at least two earlier classic papers in mathematical statistics: those of Kiefer and Wolfowitz[1] Kiefer, J. and Wolfowitz, J. 1976. Asymptotically Minimax Estimation of Concave and Convex Distribution Functions. Z. Wahrsch. Verw. Gebiete, 34: 73–85. [Crossref], [Web of Science ®] , [Google Scholar] and Grenander[2] Grenander, U. 1956. On the Theory of Mortality Measurement. Part II. Scand. Aktuarietidskrift J., 39: 125–153.  [Google Scholar] respectively. In both cases, either the greatest convex minorant or the least concave majorant played a fundamental role. Based on Kiefer and Wolfowitz's work, Wang3-4 Wang, J.L. 1986. Asymptotically Minimax Estimators for Distributions with Increasing Failure Rate. Ann. Statist., 14: 1113–1131. Wang, J.L. 1987. Estimators of a Distribution Function with Increasing Failure Rate Average. J. Statist. Plann. Inference, 16: 415–427.   found asymptotically minimax estimates of the distribution function F and its cumulative hazard function Λ in the class of all increasing failure rate (IFR) and all increasing failure rate average (IFRA) distributions. In this paper, we will prove limit theorems which extend Wang's asymptotic results to the mixed censorship/truncation model as well as provide some other relevant results. The methods are illustrated on the Channing House data, originally analysed by Hyde.5-6 Hyde, J. 1977. Testing Survival Under Right Censoring and Left Truncation. Biometrika, 64: 225–230. Hyde, J. 1980. “Survival Analysis with Incomplete Observations”. In Biostatistics Casebook 31–46. New York: Wiley Series in Probability and Mathematical Statistics: Applied Probability and Statistics.       

新乡村工业化中的生产组织方式创新——兼论新产业区的起源和演进

新产业区是20世纪70年代以来新乡村工业化的成功模式。与传统工业化过程中形成的以追求规模和范围经济为目的的大规模生产方式不同,新产业区强调柔性生产和持续创新。因而,新产业区在本质上是生产组织方式的创新,是对大规模生产的替代。新产业区的兴起和发展打破了传统发展经济学城乡二元结构和乡村发展依附城市的观点,表明20世纪70年代以来的新乡村工业化和乡村经济发展并不依赖城市,而是内生或相对独立的,拥有自身独特的发展路径。在新乡村工业化过程中,乡村经济的自组织所呈现出的报酬递增和路径依赖,构成了新产业区形成和发展的基本特征和内在机制。对新产业区起源和演进的历史条件和内在机制的理论分析,将有助于我们更深入地思考中国新农村建设中的相关问题。     

Generalized anticipated backward stochastic differential equations driven by Brownian motion and continuous increasing process*

This article mainly considers a new class of anticipated BSDEs driven by Brownian motion and continuous increasing process, which are called generalized anticipated backward stochastic differential equations(GABSDEs). We first give the form of GABSDEs. Then, existence and uniqueness result for GABSDEs is established as well as a comparison theorem is obtained under the certain assumptions. At last, we give an application about the duality between SDDEs and GABSDEs.     

Asymptotic distributions in affiliation networks with an increasing sequence

A central limit theorem for a linear combination of all the maximum likelihood estimators with an increasing dimension for affiliation networks has been established. Simulation studies are provided to illustrate the asymptotic results.