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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Iranian Journal of Mathematical Chemistry
- نوع مقاله: Journal Article
- کلمات کلیدی: Neighbourly irregular,Derived graphs,Product graphs
- چکیده:
- چکیده انگلیسی: A connected graph G is said to be neighbourly irregular graph if no two adjacent vertices of G have same degree. In this paper we obtain neighbourly irregular derived graphs such as semitotal-point graph, k^{tℎ} semitotal-point graph, semitotal-line graph, paraline graph, quasi-total graph and quasivertex-total graph and also neighbourly irregular of some graph products.
- انتشار مقاله: 19-12-1394
- نویسندگان: B. Basavanagoud,S. Patil,V. R. Desai,M. Tavakoli,A. R. Ashrafi
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Engineering, Transactions A: Basics
- نوع مقاله: Journal Article
- کلمات کلیدی: Fault detection,Anti-friction Bearing,Ensemble Learning,Vibration Signal
- چکیده:
- چکیده انگلیسی: Anti-Friction Bearing (AFB) is a very important machine component and its unscheduled failure leads to cause of malfunction in wide range of rotating machinery which results in unexpected downtime and economic loss. In this paper, ensemble machine learning techniques are demonstrated for the detection of different AFB faults. Initially, statistical features were extracted from temporal vibration signals and are collected using experimental test rig for different input parameters like load, speed and bearing conditions. These features are ranked using two techniques, namely Decision Tree (DT) and Randomized Lasso (R Lasso), which are further used to form training and testing input feature sets to machine learning techniques. It uses three ensemble machine learning techniques for AFB fault classification namely Random Forest (RF), Gradient Boosting Classifier (GBC) and Extra Tree Classifier (ETC). The impact of number of ranked features and estimators have been studied for ensemble techniques. The result showed that the classification efficiency is significantly influenced by the number of features but the effect of number of estimators is minor. The demonstrated ensemble techniques give more accuracy in classification as compared to tuned SVM with same experimental input data. The highest AFB fault classification accuracy 98% is obtained with ETC and DT feature ranking.
- انتشار مقاله: 09-04-1397
- نویسندگان: S. Patil,V. Phalle
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Advanced Design and Manufacturing Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Mechanical properties,Microstructures,FSW,AA7075 and AA6061
- چکیده:
- چکیده انگلیسی: In the present investigation the mechanical behaviour of AA7075T651 and AA6061T6 aluminium alloys plates joined by friction stir welding (FSW) were evaluated. The effects of weld process parameter like tool rotation speed 650-1000 rpm and weld speed 30-40mm/min with square trapezoidal pin profile on mechanical properties were investigated. The welded joints were tested by means of by X-ray radiography, tensile, hardness and optical microscopy testing. The radiography revealed the presence of internal in FS welds and observed that increasing transverse speed increases the occurrence of weld defects. The hardness was found to be mixed effect with respect to tool rotations and transverse speed for similar FSW joints. But in dissimilar FSW joints, hardness decreases with increasing tool speed and weld speed and it was strongly affected by precipitate distribution. Difference in grain size and distribution was observed for different ranges of rotation and weld speed.
- انتشار مقاله: 30-10-1395
- نویسندگان: H. S. Patil,Neelsai Sharma Kairav Patel,Abhishek Patel Viral Patel,Chetan Patil
- مشاهده
- جایگاه : پژوهشی
- مجله: Chemical Methodologies
- نوع مقاله: Journal Article
- کلمات کلیدی: AFM,Knoevenagel condensation,β-Lactam,Fe(acac)3,anti-microbial,FITC
- چکیده:
- چکیده انگلیسی: We have developed novel route for the synthesis of β-Lactam by Fe(acac)3 based catalytic system with >90% yield. It is one pot Knoevenagel condensation of aldehyde with ethyl cyanoacetate followed by chemoselective reduction of the nitrile substituted C=C bond and nitrile functional group with sodium borohydride.Anti-microbial activity of the compounds exhibited at lower concentration against gram positive, gram negative bacteria and yeast with minimum inhibitory coIncentration (MIC) as low as 16 µg/mL. Compound have low hemolytic activity at their respective MIC. These derivatives might be liable to be increase the permeability of the bacterial cell membrane, which was demonstrated by DAPI, FITC, PI uptake studies and atomic force microscopy imaging of the treated cells. One pot synthesis with anti-microbial activity of β-Lactam derivatives can be helpful to developed effective antibacterial agents.
- انتشار مقاله: 13-07-1397
- نویسندگان: Manojkumar U. Chopade,Harshal S. Patil,Milind D. Nikalje,Anil U. Chopade,Santosh Gaikwad
- مشاهده