7,140 research outputs found
Laparoscopy Pneumoperitoneum Fuzzy Modeling
Abstract: Gas volume to intra-peritoneal pressure fuzzy modeling for evaluating pneumoperitoneum in videolaparoscopic surgery is proposed in this paper. The proposed approach innovates in using fuzzy logic and fuzzy set theory for evaluating the accuracy of the prognosis value in order to minimize or avoid iatrogenic injuries due to the blind needle puncture. In so doing, it demonstrates the feasibility of fuzzy analysis to contribute to medicine and health care. Fuzzy systems is employed here in synergy with artificial neural network based on backpropaga tion, multilayer perceptron architecture for building up numerical functions. Experimental data employed for analysis were collected in the accomplishment of the pneumoperitoneum in a random population of patients submitted to videolaparoscopic surgeries. Numerical results indicate that the proposed fuzzy mapping for describing the relation from the intra peritoneal pressure measures as function injected gas volumes succeeded in determinining a fuzzy model for this nonlinear system when compared to the statistical model
An artificial immune systems based predictive modelling approach for the multi-objective elicitation of Mamdani fuzzy rules: a special application to modelling alloys
In this paper, a systematic multi-objective Mamdani fuzzy modeling approach is proposed, which can be viewed as an extended version of the previously proposed Singleton fuzzy modeling paradigm. A set of new back-error propagation (BEP) updating formulas are derived so that they can replace the old set developed in the singleton version. With the substitution, the extension to the multi-objective Mamdani Fuzzy Rule-Based Systems (FRBS) is almost endemic. Due to the carefully chosen output membership functions, the inference and the defuzzification methods, a closed form integral can be deducted for the defuzzification method, which ensures the efficiency of the developed Mamdani FRBS. Some important factors, such as the variable length coding scheme and the rule alignment, are also discussed. Experimental results for a real data set from the steel industry suggest that the proposed approach is capable of eliciting not only accurate but also transparent FRBS with good generalization ability
Penguasaan kemahiran generik di kalangan graduan hospitaliti di politeknik : satu kajian berkenaan keperluan industri perhotelan, persepsi pensyarah dan pelajar
Kajian yang dijalankan ini bertujuan untuk mengenal pasti kepentingan
kemahiran generik mengikut keperluan industri perhotelan di Malaysia dengan persepsi pensyarah dan persepsi pelajar Jabatan Hospitaliti. Oleh kerana matlamat kurikulum pendidikan kini adalah untuk melahirkan graduan yang dapat memenuhi keperluan pihak industri, maka kajian ini dijalankan untuk menilai hubungan di antara keperluan industri perhotelan di Malaysia dengan persepsi pensyarah dan pelajar Jabatan Hospitaliti di Politeknik. Terdapat 13 kemahiran generik yang diperolehi daripada Kementerian Pelajaran dan Latihan Ontario (1997) dijadikan
sebagai skop kepada instrumen kajian. Responden kajian terdiri daripada tiga pihak utama iaitu industri perhotelan di Malaysia yang melibatkan 40 buah hotel yang diwakili oleh MAH Chapter dan jawatankuasa dalam Malaysian Associated of Hotel (MAH), pensyarah Unit Hotel dan Katering dan pelajar semester akhir Diploma Hotel dan Katering di Politeknik Johor Bahru, Johor dan Politeknik Merlimau, Melaka. Kajian rintis yang dijalankan menunjukkan nilai Alpha Cronbach pada 0.8781. Data yang diperolehi dianalisis secara deskriptif dan inferensi dengan menggunakan perisian Statistical Package for Social Science (SPSS) versi 11.5. Melalui dapatan kajian, satu senarai berkenaan kemahiran generik yang diperlukan
oleh industri perhotelan telah dapat dihasilkan. Selain itu, senarai kemahiran generik menurut persepsi pensyarah dan juga persepsi pelajar turut dihasilkan. Hasil statistik dan graf garis yang diperolehi menunjukkan terdapat perbezaan di antara kemahiran generik yang diperlukan oleh industri perhotelan di Malaysia dengan kemahiran generik menurut persepsi pensyarah dan persepsi pelajar Politeknik. Dapatan analisis menggunakan korelasi Pearson mendapati bahawa tidak terdapat
perhubungan yang signifikan di antara kemahiran generik yang diperlukan oleh industri perhotelan dengan persepsi pensyarah dan persepsi pelajar. Namun begitu, terdapat hubungan yang signifikan di antara persepsi pensyarah dengan persepsi pelajar berkenaan dengan amalan kemahiran generik di Politeknik
An immune algorithm based fuzzy predictive modeling mechanism using variable length coding and multi-objective optimization allied to engineering materials processing
In this paper, a systematic multi-objective fuzzy
modeling approach is proposed, which can be regarded
as a three-stage modeling procedure. In the first stage, an
evolutionary based clustering algorithm is developed to
extract an initial fuzzy rule base from the data. Based on
this model, a back-propagation algorithm with momentum
terms is used to refine the initial fuzzy model. The refined
model is then used to seed the initial population of an
immune inspired multi-objective optimization algorithm
in the third stage to obtain a set of fuzzy models with
improved transparency. To tackle the problem of
simultaneously optimizing the structure and parameters, a
variable length coding scheme is adopted to improve the
efficiency of the search. The proposed modeling approach
is applied to a real data set from the steel industry.
Results show that the proposed approach is capable of
eliciting not only accurate but also transparent fuzzy
models
Building information modeling (BIM) and green building index (GBI) assessment framework for non-residential new construction building (NRNC)
The global construction industry endorsed Building Information Modeling (BIM)
and its many advantages. However, despite this endorsement, BIM still failed to
attract Malaysian companies to use BIM in green building assessment, especially for
the assessment of Green Building Index (GBI), and maintain GBI certification during
building occupancy using BIM features. The main issue of utilizing BIM as a GBI
assessment tool is the applicability of BIM Tools to digitalize GBI credit by design
team, which results in the digitization of GBI criteria into BIM Model. This study
aims to identify common components related to the capability of BIM to digitalize
and assess GBI criteria. These components include BIM uses and tools and GBI
criteria and processes. This study applied quantitative and qualitative approaches to
collect data. The quantitative approach used questionnaires, which were distributed
to 900 GBI members, i.e. GBI certifiers and facilitators. The survey generated a
response rate of 32% during eight months of data collection. The results were
analyzed using SPSS and SmartPLS. Four model categories were identified, namely,
BIM uses, BIM tools, GBI criteria and GBI certification process. These categories
were used to assess the BIMâGBI framework. The results obtained from the
questionnaire showed that only 16 BIM uses must be included in the BIM execution
plan of the GBI project for assessment purposes. The results also showed that the
BIM tools present different levels of effect on the GBI criteria. The capability of
BIM to assess GBI could be stronger in the design assessment (DA) than in the
operation assessment, which supports the suggested BIMâGBI assessment
framework. The second data collection was conducted through a focus group
interview with BIM and GBI experts. Two interview sessions were conducted.
Results show that the assessment method has a significant correlation in the BIMâ
GBI framework. The following categories were identified for the BIM assessment
framework: BIM uses, BIM tools, and control, which were based on the GBI criteria
for scoring and certification. Findings from the BIM and GBI assessment method
framework show that GBI credits can be digitalized using different BIM uses directly
and indirectly assessed by BIM tools for each GBI credit in both GBI assessment
process. Based on the qualitative result of this research showed that BIM can help the
design team to achieve 55% point in design assessment (DA) only and this helps the
building to achieve GBI certification in level 4 of certified rating. On the other hand,
45% points of GBI credits can be digitals in completion and verification assessment
(CVA). The framework provides a guide for the design team and facility
management in digitalizing and assessing GBI criteria using BIM application during
design assessment (DA) and completion and verification assessment (CVA) for new
nonresidential constructions. The framework also offers and provides insights that
will enable designers to understand the relationship between BIM and GBI criteria,
which will contribute to BIM integration in Stage 3 and automate GBI assessment for
the Malaysian construction industry
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