18226391
Rough-Set Multiple-Criteria ABC Analysis
Multiple-criteria ABC (MCABC) analysis is conducted using a dominance-based rough set approach. ABC analysis, a well-known technique for inventory planning and control, divides stock-keeping units (SKUs) into three classes according to annual dollar usage. But MCABC analysis offers more managerial flexibility by including other criteria, such as lead time and criticality, in the classification of SKUs. The objective of this paper is to propose an MCABC method that uses the dominance-based rough set approach to generate linguistic rules that represent a decision-maker's preferences based on the classification of a test data set. These linguistic rules are then used to classify all SKUs. A case study demonstrates that the procedure is feasible.
5213924
Multiple criteria classification with an application in water resources planning
A new kind of multiple criteria decision aid (MCDA) problem, multiple criteria classification (MCC), is studied in this paper. Traditional classification methods in MCDA focus on sorting alternatives into groups ordered by preference. MCC is the classification of alternatives into nominal groups, structured by the decision maker (DM), who specifies multiple characteristics for each group. Starting with illustrative examples, the features, definition and structures of MCC are presented, emphasizing criterion and alternative flexibility. Then an analysis procedure is proposed to solve MCC problems systematically. Assuming additive value functions, an optimization model with constraints that incorporate various classification strategies is constructed to solve MCC problems. An application of MCC in water resources planning is carried out and some future extensions are suggested.
13487570
Texture classification using statistical geometrical features
This paper presents a new texture feature set based on the statistics of geometrical attributes of connected regions in a stack of binary images obtained from a texture image. Systematic evaluation using all the Brodatz textures shows that the new set outperforms the well-known statistical gray level dependence matrix, the recently proposed statistical feature matrix, and Liu's features.<<ETX>>
46601989
Analysis of Lotka's law: The Simon-Yule approach
Abstract A major difficulty in using the well-known Lotka's law in information science is in the estimation of parameters. In this paper, we argue that the difficulty arises from the misuse of goodness-of-fit tests. As an alternative, we adopt Simon's five-step modeling process for the study of Lotka's law. Three significant contributions can be identified. First, an index approach is used to identify a general formulation of Lotka's law. Second, a time series approach is used to identify two influential variables associated with the empirical data. Third, the constructive mechanism proposed by Simon is used to derive a distribution resembling the general formulation of Lotka's law. Further research on refining the constructive mechanism is suggested.
16769940
System administrators are users, too: designing workspaces for managing internet-scale systems
The people who run large-scale computer systems deserve the attention of the HCI community. These professionals work with increasingly diverse and complex hardware and software, large systems often characterized as "unknowable" by a single person. Relying on relatively crude tools, these professionals keep the technological world running. By improving the system administration work environment, the cost of computing and risk of downtime will be decreased while the deployment of complex, beneficial systems will increase.This one-day workshop will focus on the HCI problems of system administrators, specifically management of scale and diversity, problem solving, and system monitoring and notification. Our goal is to bring together (1) HCI researchers, (2) middleware user interface software developers, and (3) real-world system administrators to form a cross-disciplinary community around this topic.
19799763
An approach to isochronous slot reuse for multimedia services on DQDB network
This paper discusses an isochronous connection management protocol and its slot-reuse scheme for multimedia services on DQDB network. For asynchronous services, slot-reuse improves slot utilization, which has already been discussed in depth. However only few literature addressed the slot-reuse for synchronous services. Our proposed scheme reuses video slots for either synchronous or asynchronous services according to the need of downstream nodes. Simulation shows that the scheme significantly increases the maximum number of video connections as well as reduces the failure rate of connection request comparing with that without slot-reuse.
54815196
Cascaded carry-select adder (C2SA): a new structure for low-power CSA design
In this paper we propose a novel low-power Carry-Select Adder (CSA) design called Cascaded CSA (CSA). Based on the prediction of the critical path delay of current operation, CSA can automatically work with one or two clock-cycle latency and a scaled supply voltage to achieve power improvement. Post-layout simulations of a 64-bit CSA in 180nm Technology show that CSA can operate at a lower supply voltage, attaining 40.7% energy saving, while maintaining a similar (average) Latency Per Operation (LPO) compared to standard CSA.