集群计算机技术应用

网络技术发展和并行编程环境的出现,充分提高了集群计算机的并行性和可用性,集群计算机系统成为并行处理的主流。     

A Note on Gaussian Estimation of the CKLS and CIR Models with Feedback Effects for Japan

In this note we extend the Gaussian estimation of two factor CKLS and CIR models recently considered in Nowman, K. B. (2001, Gaussian estimation and forecasting of multi-factor term structure models with an application to Japan and the United Kingdom, Asia Pacif. Financ. Markets 8, 23–34) to include feedback effects in the conditional mean as was originally formulated in general continuous time models by Bergstrom, A. R. (1966, Non-recursive models as discrete approximations to systems of stochastic differential equations, Econometrica 34, 173–182) with constant volatility. We use the exact discrete model of Bergstrom, A. R. (1966, Non-recursive models as discrete approximations to systems of stochastic differential equations, Econometrica 34, 173–182) to estimate the parameters which was first used by Brennan, M. J. and Schwartz, E. S. (1979, A continuous time approach to the pricing of bonds, J. Bank. Financ. 3, 133–155) to estimate their two factor interest model but incorporating the assumption of Nowman, K. B. (1997, Gaussian estimation of single-factor continuous time models of the term structure of interest rates, J. Financ. 52, 1695–1706; 2001, Gaussian estimation and forecasting of multi-factor term structure models with an application to Japan and the United Kingdom, Asia Pacif. Financ. Markets 8, 23–34). An application to monthly Japanese Euro currency rates indicates some evidence of feedback from the 1-year rate to the 1-month rate in both the CKLS and CIR models. We also find a low level-volatility effect supporting Nowman, K. B. (2001, Gaussian estimation and forecasting of multi-factor term structure models with an application to Japan and the United Kingdom, Asia Pacif. Financ. Markets 8, 23–34).     

污水除磷脱氮工艺的比较研究——平行AN/AO工艺构建

分析并阐述了现有反硝化除磷工艺的设计思想、优缺点和阻碍应用的关键。提出低浓度污水强化反硝化除磷的一体化工艺——平行AN／AO工艺的主要构型。在讨论其可能存在的两种工艺构型和设计理念的同时，比较了平行AN／AO工艺与其他同步除磷脱氮工艺的特点。     

“入世”后我国农业发展的政策选择

本文围绕“三农”问题 ,提出了消除工农业产品价格剪刀差、解决“三农”问题的根本途径是执行“反哺”农业政策 ,从政治、经济、科技等方面提出了可操作性的建议与对策。     

A fast airplane boarding strategy using online seat assignment based on passenger classification

The minimization of the turnaround time, the duration which an aircraft must remain parked at the gate, is an important goal of airlines to increase their profitability. This work introduces a procedure to minimize of the turnaround time by speeding up the boarding time in passenger aircrafts. This is realized by allocating the seat numbers adaptively to passengers when they pass the boarding gate and not before. Using optical sensors, an agility measure is assigned to each person and also a measure to characterize the size of her/his hand-luggage. Based on these two values per passenger and taking into account additional constraints, like reserved seats and the belonging to a group, a novel seat allocation algorithm is introduced to minimize the boarding time. Extensive simulations show that a mean reduction of the boarding time with approximately 15% is achieved compared to existing boarding strategies. The costs of introducing the proposed procedure are negligible, while the savings of reducing the turnaround time are enormous, considering that the costs generated by inactive planes on an airport are estimated to be about 30 $ per minute.     

一种咬尾双二进制Turbo码并行译码方案

针对双二进制Turbo译码使用并行、滑动窗联合译码技术时，其咬尾的编码构造和窗分割导致边界状态值难以获取的问题，提出了一种新咬尾Turbo码并行、滑动窗译码方案——扩展交叠方案。该方案采用了边界状态盲估计和滑动窗状态回溯两种新译码技术。相比于传统的边界状态度量传播方法（又称迭代法），新方法一方面提高了边界状态度量的准确性，从而加快了译码收敛速度，一定程度上减小了高信噪比下的性能损失；另一方面避免了存储前一次译码的迭代度量值，更有利于硬件设计。仿真表明，新方案在64左右的中等窗长下即可消除并行和滑动窗影响，逼近原始无并行无滑动窗译码的性能，且窗长越小，其相较传统迭代法带来的译码性能增益就越明显。该方案具有较好的实用性和应用价值，可以满足5G的高速率、低时延和低存储的数据传输要求。     

The fog of feedback: Ambiguity and firm responses to multiple aspiration levels

This study examines firms' responses to performance assessments relative to multiple aspiration levels. We argue that comparisons of performance to multiple aspiration levels over time affects the interpretative clarity of feedback and, consequently, shapes a firm's responsiveness. We further conceptualize the relationship between performance relative to social and historical aspirations as ambiguous, inconsistent, and consistent performance feedback. Empirically, we examine the effects—on firms' responsiveness—of weak, negative, and positive correlations between performance relative to social and historical aspirations, where responsiveness is measured in terms of new product introductions. We find that both inconsistent and consistent feedback increase a firm's responsiveness, whereas ambiguous feedback dampens responsiveness. Our focus on this type of feedback ambiguity is novel, and it establishes the functional form of the relationship between feedback clarity/ambiguity and responsiveness. This paper augments the behavioral theory of the firm and research on performance feedback; it also extends previous work on ambiguity in strategic decision making. Copyright © 2014 John Wiley & Sons, Ltd.     

基于Syntax级分组和多线程处理的HEVC熵编码并行算法

新一代视频编码标准HEVC获得了较高的编码效率,但是同时需要较大的计算量。HEVC并行算法能够提高编码速度,如何开发适用于多核处理器的并行编码算法对于满足高清视频实时传输和大规模共享具有十分重要的意义。提出了一种基于Syntax级分组和多线程处理的HEVC熵编码并行算法。该算法首先将HEVC中一个编码树单元的编码信息按照语法元素进行分组;其次,根据编码块数据间的相关性构建Syntax级并行编码器;然后结合多线程技术实现HEVC帧级编码的并行计算。实验结果表明,在编码图像的主客观质量上没有太大损失的情况下,该并行算法框架与传统的串行算法框架相比具有65%~70%的加速效果。     

360度绩效评价体系主体选择方法探讨——基于360度绩效评价体系系统误差研究

利用各类主体在绩效评价中产生的绩效评估误差构建权重方程,讨论分析权重方程解的不同情况并据此探讨主体选择体系最佳或最满意的选择方式。在探讨过程中导出了360度评价体系全方位主体选择的适用范围,分析了其局限性和不适用范围以达到研究主要目的,针对360度评价体系的不足提出了在绩效评价主体选择中的相关建议。     

基于反馈控制原理的应急物资分配动态决策过程分析

随着灾害应急物流系统快速响应机制的建立,应急物资分配在降低自然灾害的影响方面体现出重要作用。应急物资需求具有突发性和动态性等特征,资源的分配是一个动态的过程。基于此借鉴反馈控制原理构建应急物资分配决策模型,对灾害应急物流中的应急物资分配动态决策过程进行分析。