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排序方式: 共有58条查询结果,搜索用时 281 毫秒
1.
Kok Yew Ng Chee Pin Tan Rini Akmeliawati Christopher Edwards 《Asian journal of control》2010,12(5):656-660
This paper investigates and presents conditions that guarantee disturbance decoupled fault reconstruction using sliding mode observers, which are less stringent than those of previous work, and show that disturbance reconstruction is not necessary. An aircraft model validates the ideas proposed in this paper. Copyright © 2010 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society 相似文献
2.
Raafat Safanah M. Akmeliawati Rini Martono Wahyudi 《International Journal of Control, Automation and Systems》2010,8(5):1123-1132
This paper addresses an intelligent uncertainty function to improve the robust stability and performance of H
∞ controlled system in terms of reduced conservatism. The system is identified, output performance and control signal requirements
are controlled by proper selection of performance and control weighting functions. Adaptive Neuro Fuzzy Inference System (ANFIS)
learns the uncertainty bounds of model uncertainty that results from unmodeled dynamics and parameter variations, then the
developed uncertainty weighting function will be included in the synthesis of the H
∞ controller. ν-gap measure is utilized to validate the intelligent identified uncertainty bounds and measure the stability of the designed
H
∞ controlled system as well. Experimental results on a servo motion system reveal the advantages of combining intelligent uncertainty
identification and robust control. Improved performance is achieved. The proposed approach also allows for iterative experiment
design. 相似文献
3.
Product Focused Software Process Improvement: Concepts and Experiences from Industry 总被引:1,自引:0,他引:1
Management problems in the development of software have been addressed over the last years by a strong focus on the improvement of the development processes. Software process improvement (SPI) activities are characterized by an internal focus on a software development department and its procedures. However, the quality of the product is hardly addressed in software process improvement programs. This paper presents the application of a model for product focused SPI (P-SPI) and describes experiences with this model in practice. The main conclusions are that P-SPI puts products to be developed in a central position in improvement programs, results in fulfilling specific quality goals of a company and project, and industrial experiments show interesting benefits. Applying the approach in industrial projects showed that P-SPI is relatively cheap and gives fast results and high benefits. 相似文献
4.
G. Flint S. Lamont B. Lane H. Sarrazin L. Lim Darlene Rini C. Roben 《Fire Technology》2013,49(3):767-792
The knowledge in the field of structural fire engineering has been greatly advanced through assessment of a number of real fires (WTC, Torre Windsor, Broadgate, etc.) and, especially, by the Cardington series of full scale structural fire tests. This knowledge has been used to validate and verify the use of computational finite element models that have expanded the range of structures that can be investigated under severe fire exposure. This paper presents a selection of key lessons learned by the authors through the assessment of structures in fire for real commercial building projects. The key areas of sensitivity that have been encountered are described and a discussion of each point presented. The paper is aimed at describing potential weaknesses that have been observed in the commercial work of the authors, often driven by the requirements for efficient ambient structural design. The paper concludes with some suggested advice for structural engineers aimed at increasing the general robustness of building structures. This is based on designing out as far as possible in the ambient design of a structure the potential weaknesses identified in past project work. 相似文献
5.
E. G. Rini N. K. Gaur V. Shelke J. Galgale M. P. Verma R. K. Singh 《Journal of Superconductivity》2002,15(6):583-585
We have developed a shell model, which includes the long-range coulomb, van der Waals interaction, and the short-range Hafemeister–Flygare repulsive interaction operative up to second neighbor atom to study the cohesive and thermal properties of LaMnO3 + . The results on cohesive energy obtained by us are in good agreement with that of calculated value by DeSouza et. al. (R. A. DeSouza, M. S. Islam, and E. I. Tiffee, J. Mater. Chem.
9, 1621 (1999)). In addition, we have also calculated molecular force constant (f), compressibility (), restrahlen frequency (o), Debye temperature (D), and the low temperature specific heat at 50 K T 160 K. Our results on Debye temperature and specific heat for the temperature range 50 K T 160 K are closer to the recently measured data with an automated quasi-adiabatic pulse technique. 相似文献
6.
Summary It has been found that the method of moisture determination introduced by Parsons and Holmberg, in which water is evolved
from the sample and absorbed on CaCl2, is absolute and is applicable to all types of oils and fats, except those containing residual solvent. It is particularly
suited for the determination of very low percentages of moisture in oils and fats.
Of the methods recommended by the A.O.C.S. for the determination of moisture and volatile in oils and fats, the vacuum oven
was found to be the most accurate, except on high-fatty-acid coconut oil.
The hot-plate method gave the highest moisture results when the test was conducted according to the procedure outlined in
the methods of the A.O.C.S. When first traces of smoking were observed under a strong beam of concentrated light, resulting
moistures approached those obtained by the vacuum oven.
Moisture results obtained by the air oven, if corrected for peroxide absorption, approach those of the vacuum oven.
The percent of residual solvent in extracted soyabean oil, independent of moisture, may be accurately determined by adsorption
of solvent vapor on activated charcoal. 相似文献
7.
Nick C. Rini 《Information Systems Management》1990,7(1):73-75
Although most MIS departments use manual procedures to make changes to existing systems and applications, these procedures often cost the organization significant staff time and money. Although other MIS departments use their own automated methods for tracking these changes, these methods are no better because they are often not implemented throughout the organization's information systems, and, as a result, their effectiveness is limited. This column discusses the economic advantages of implementing an automated change control system. 相似文献
8.
9.
Rini Christine; Manne Sharon; DuHamel Katherine; Austin Jane; Ostroff Jamie; Boulad Farid; Parsons Susan K.; Martini Richard; Williams Sharon E.; Mee Laura; Sexson Sandra; Redd William H. 《Canadian Metallurgical Quarterly》2008,27(5):593
Objective: To investigate whether social support from family and friends (family/friend support) attenuated ("buffered") adverse effects of having low spouse support (spousal support) among mothers of children undergoing hematopoietic stem cell transplantation (HSCT). Design: One hundred sixty-three married mothers who were their child's primary caregiver during treatment completed assessments during the child's hospitalization for HSCT and 3-, 6-, and 12-months post-HSCT. Measures: Family/friend support and spousal support were assessed during hospitalization. Maternal physical and mental health-related functioning (the main outcome measures) were assessed at all timepoints. Results: Multilevel modeling was used to analyze trajectories of maternal functioning. Findings indicated that mothers with low spousal support and low family/friend support demonstrated the worst functioning across all timepoints. Mothers with low spousal support and high family/friend support demonstrated significantly better functioning, supporting the hypothesized buffering effect. Their functioning compared to the functioning of mothers with high spousal support. Moreover, mothers with high family/friend support demonstrated trajectories of physical health-related functioning that were more stable than the trajectories of mothers with low family/friend support. Conclusion: These findings have clinical implications in addition to advancing knowledge of social support processes among couples coping with the shared stressor of a child's life-threatening illness and treatment. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
10.
Rini Christine; Redd William H.; Austin Jane; Mosher Catherine E.; Meschian Yeraz Markarian; Isola Luis; Scigliano Eileen; Moskowitz Craig H.; Papadopoulos Esperanza; Labay Larissa E.; Rowley Scott; Burkhalter Jack E.; Schetter Christine Dunkel; DuHamel Katherine N. 《Canadian Metallurgical Quarterly》2011,79(1):64
Objective: Hematopoietic stem cell transplant (HSCT) survivors who are 1 to 3 years posttransplant are challenged by the need to resume valued social roles and activities—a task that may be complicated by enduring transplant-related psychological distress common in this patient population. The present study investigated whether transplant survivors who receive adequate social support from their spouse or intimate partner experience lower distress. Method: Effects of receiving a greater quantity of partner support (a common approach to studying enacted support) were compared with effects of receiving more effective partner support (i.e., support that more closely matches their needs in terms of its quantity and quality). Men and women (N = 230) who were 1 to 3 years posttransplant completed measures of partner support quantity (Manne & Schnoll, 2001), partner social support effectiveness (Rini & Dunkel Schetter, 2010), and psychological distress (Brief Symptom Inventory; Derogatis & Spencer, 1982). Potential medical and sociodemographic confounds were controlled in analyses. Results: As hypothesized, survivors reported less distress when they received more effective partner support (p 相似文献