美国深空网的同波束干涉测量技术

讨论了美国NASA深空网(DSN)对深空飞船所采用的同波束干涉(SBI)技术概念和测量原理，并介绍了这一技术的应用和发展情况。     

正度拟齐次Toeplitz算子的乘积

在Bergman空间上讨论了以拟齐次函数为符号的Toeplitz算子的乘积问题.使用Mellin变换作为工具,得出了当拟齐次函数的度都为正度时两个Toeplitz算子乘积仍是Toeplitz算子的充分必要条件,完善了以往文献中的有关结果.     

矩阵求逆的一个算法

由已知n阶矩阵A构造一个n阶矩阵序列A~(k)(k=1,…,n)以及相应的初等变换矩阵E_(kx),然后利用矩阵的乘法,递推求得A的逆或断定A不可逆。并且给出了算法和理论依据。     

创新型企业组织形式的设计

创新型企业在组织构成上与传统企业有很大的不同，它是为了达到技术和产品创新的目的，在不同专业领域进行一定方式的分工和合作的一批高素质技术人员的集合。因此，在组织上，创新型企业就要不同于传统企业的直线职能式的组织结构。经研究，它应以项目组为组织的基本单元，建立矩阵式的组织结构，充分利用人力资源，灵活、快速地适应环境的变化。     

城市空间发展哲学思辩

通过对十多个城市空间发展的个案分析 ,作者指出 ,在城市空间拓展过程中 ,通过规划调控、行政区划调整等手段 ,可以使城市劣势空间变优势空间 ,使分割空间变整体空间 ,平淡空间变特色空间 ,变限制空间为超越限制空间     

An algebraic theory of multi-product decisions

Summary. We exploit the existence of matrix group symmetries on a production possibility set to identify group symmetries on the profit function. The groups are isomorphic, and provide a pre-ordering on firm preferences over prices. Together with additional structure on the technology, symmetries generate comparative statics on price responses. Linear and other invariances place bounds on firm choice vectors. Reflection group asymmetries on the feasible choice set also support welfare rankings over prices. The methods are adapted to study consumer decisions.Received: 12 August 2002, Revised: 30 January 2004, JEL Classification Numbers: D11, D21, C60, L23. Correspondence to: David A. Hennessy     

风景旅游型都市的空间开发途径--以杭州市为例

根据对杭州市空间开发历程和国外空间开发模式的分析,论述杭州市在建设风景旅游型都市的过程中,需要进一步把行政区域的空间扩大优势,转变为城市社会、经济、空间、环境的全方位耦合优势,进行科学、合理、可行而具有超前性的城市空间开发.     

加权Hardy空间上算子序列的收敛性

设D为复平面C中的开单位圆盘，φ：D→D解析，ψ：D→C，Cψ，φ是H^2（β）上的加权复合算子，S是加权移位算子，该文通过讨论算子序列{S^＊nCψ，φS^n}n=1^∞与{S^＊nCψ，φ^＊S^n}n=1^∞的收敛性来研究H^2（β）上加权复合算子Cψ，φ的渐近Toeplitz性．     

一种特殊的码型对载波恢复环路性能影响的分析

本文从几个不同的角度对国际商务英语及其教学作一番思辨。作者就以下3个问题发表了自己的看法:(1)多角度地界定国际商务英语;(2)国际商务英语学习者群体的成份;(3)国际商务英语教学的主要特点和规律。     

Time,space and accounting at Nonantola Abbey (1350–1449)

Accounting historians have provided several accounts of monastic life and accounting's role in it, considering important settings such as Montecassino and San Pietro abbeys in Italy and Durham Cathedral Priory in England. Research has shown how their governance arrangements and common values enabled the Benedictines to manage their monasteries in an efficient manner which was essential in tackling the misappropriation of resources by organisational actors, including abbots. Other studies have shed light on the use of practical and effective accounting practices by the Benedictines to manage their considerable wealth and pursue their spiritual and temporal goals. Nevertheless, this body of literature is yet to explicitly consider the dimensions of time and space and their relationship with accounting practices. This study begins to address this oversight by analysing the surviving accounting records of the Benedictine abbey of Nonantola in northern Italy from 1350 to 1449. In the accounting books of Nonantola Abbey linear and cyclical conceptions of time coexisted and had an impact on the way in which transactions were reflected in the accounts. At the same time, the abbey was at the centre of a complex network of accountabilities which included lay accountants, farmers and the lessees of the abbey's properties. The main characteristic of this system was not the accuracy of the records in detailing the assets, liabilities, expenses and revenue of the abbey but the maintenance of a control system to administer an extensive agricultural network and the identification of the relationships between the abbey and the stakeholders inhabiting its space.