载体孔结构与三效催化剂起燃特性实验研究

采用不同孔密度载体分别负载不同贵金属含量、不同涂层涂敷量制备系列三效催化剂,通过模拟计算和发动机台架试验研究了具有不同孔结构载体的催化剂性能.结果表明,提高载体孔密度可明显改善催化剂的起燃特性和空燃比特性、有效降低催化剂中贵金属用量、提高HCs转化效率.起燃温度变化取决于孔密度和贵金属含量间的协同作用;载体孔密度变化对...     

Algorithm for constructing three-way concepts

The theory of three-way concept analysis is newly developed, but so far there is no concrete algorithm for constructing three-way concepts. In order to solve this problem, a three-way concept construction algorithm named CbO3C is firstly proposed in this paper. The CbO3C adopts the idea of the construction algorithm CbO of formal concepts in formal concept analysis. At the same time, in order to improve the efficiency and lower the memory overhead, the CbO3C employs the partial closure canonicity test and inherited failure test to reduce the repeated computations of three-way concepts, applies the reduction condition to filter the non-core three-way concepts, and implements set operations on the basis of bits. The experiments with UCI and random data sets show that the CbO3C can correctly and efficiently calculate all core three-way concepts of a formal context.     

Professional decisions: responsibilities

The responsibilities which civil engineers, and particularly the engineer of record, accept are considered. The interaction with other decision-makers such as the owner, stakeholders, the law and contractors results in complexity that can be partially resolved by the introduction of protocols in the form of regulations and codes of practice. However, uncertainty always exists and can result in surprises that can produce both beneficial and bad results. The sections entitled the cast, protocols and reality, advocacy and surprise, and complexity cover these topics. The nature of responsibility is analysed. Professional engineers work within an increasingly complex environment and have a responsibility to acquire and use skills beyond those applicable to traditional technical issues.     

Personal intelligence expressed: A theoretical analysis.

An individual's cumulative life decisions help determine that person's well-being. To make good decisions requires knowing something about who one is and who one wants to be. It seems plausible that personality may draw on a specifically tailored intelligence that supports its own self-understanding and contributes to such life decisions. This personal intelligence (PI) helps the individual meet his or her own personal needs and to fit in with (or stand out from) the environment. What are people high in PI actually like relative to those lower in the skills? Drawing on a 2008 theory of PI-related abilities, the author reviews several literatures to examine what features distinguish the behavior of people high in PI from those lower in such skills. The feature list sets the stage for future research in distinguishing high-PI individuals from low-PI individuals according to their life expressions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Adaptive Online Voltage Scaling Scheme Based on the Nash Bargaining Solution

In an effort to reduce energy consumption, research into adaptive power management in real‐time systems has become widespread. In this paper, a novel dynamic voltage scaling scheme is proposed for multiprocessor systems. Based on the concept of the Nash bargaining solution, a processor's clock speed and supply voltage are dynamically adjusted to satisfy these conflicting performance metrics. In addition, the proposed algorithm is implemented to react adaptively to the current system conditions by using an adaptive online approach. Simulation results clearly indicate that the superior performance of the proposed scheme can strike the appropriate performance balance between contradictory requirements.     

Introduction

In the planning of a new passenger railway in Perth over many years, state agencies have actively pursued opportunities for transit-oriented development along its route. There is a strong policy framework demonstrating clear intent on the type of development required. Designing a transport system to compete with the car in an established low-density suburban environment has, however, raised some significant challenges for land-use planning. This article reports the results of research aimed at assessing changes in non-residential land use and the behavioural responses of local businesses in three emerging transit-oriented development precincts. It examines the first wave surveys of land use and businesses in 2006, the year before the railway opened, questioning the extent to which business has anticipated the new railway. The findings indicate that, despite good policy intent, planning in anticipation of the railway has been weak and insufficient attention was paid to implementation of important strategic planning principles and policies. While some land uses are compatible with transit-oriented development, these businesses employ small numbers, at odds with policies that required high trip generating development. Businesses have not shown a particularly strong interest in the new railway, their location decisions appear to reflect standard business practice rather than being influenced by opportunities created by the railway. There is a glimmer of anticipation—incoming businesses are more positive about the opportunities the railway may bring than those established in the station precincts before the 2001 railway route was announced. In particular, a significantly higher proportion of businesses in one case study station precinct are positive about opportunities created by the railway.     

Diversity of ability and cognitive style for group decision processes

This research investigates the potential for two forms of error diversity (ability diversity and diversity of cognitive style) to increase the accuracy of multi-agent group decision processes. An experimental methodology is employed that rigorously controls for the sources of error diversity. The results indicate that ability diversity decreases group decision errors by approximately 4%. Cognitive diversity is much more effective; decision errors are reduced by approximately 13% by groups formed from four cognitive classes. As sources of ability and cognitive diversity increase, the generalization error of the group decision decreases, and the prominence of the most capable member (i.e., expert) in the group diminishes. Thus, the popular reliance on using more capable members to create high performance homogenous groups may be misguided. This research indicates that a better strategy is to create groups of members that ‘think differently’ and cooperate to produce a group decision. Using this strategy, we are able to reduce the group decision error in two bankruptcy detection data sets by 11-47%. Reductions of this magnitude in high volume, high value, and repetitive decision environments characterizing the financial domain are extremely significant, where error reductions of even a fraction of a percent are welcome.     

三通管接头注射模的设计与制造

介绍了三通管接头两种最简单的大抽芯距三向脱模结构,采用斜导滑板的抽芯脱模典型结构,利用推杆推动摆板摆动,从而完成抽芯脱模的另一种结构。     

A Qualitative Study of Hard Decision Making in Managing Global Software Development Teams

We empirically explored the implication of hard decisions in the context of the management of global software development (GSD) teams. We hypothesized and empirically tested our belief that hard decision making in conventional development projects is very similar to GSD and differences arise from the nature of the relationship and the ranking of issues. Findings from a Delphi study illustrated our approach and shed some light into the management of GSD teams.     

政策约束下的制造商与再制造商生产决策分析

在由一个制造商和一个再制造商构成的市场中,考虑消费者对于制造商的新产品、再制造产品以及再制造商的再制造产品都有着不同支付意愿的情形下,研究立法机构在制定制造商应回收处理新产品最低比例的约束情形时,对于企业收益、消费者剩余、环境效益以及社会福利的影响。研究表明,回收比例升高,会降低制造商新产品产量并提高其价格。同时,提高回收比例也可能会降低市场上的再制造产品数量。此外,环境效益与最低回收目标正相关。数值分析表明,当消费者对于再制造产品的支付意愿越高时,则社会福利越高。通过与回收基金政策进行对比,制定最低回收率对环境效益提高作用更显著。