Search or add a thesis

Advanced Search (Beta)
Home > Laser Cutting Optimization of Non-Metallic Materials Overall Quality

Laser Cutting Optimization of Non-Metallic Materials Overall Quality

Thesis Info

Access Option

External Link

Author

Zaidi, S. Mustafa Ali

Program

PhD

Institute

Shaheed Zulfikar Ali Bhutto Institute of Science and Technology

City

Karachi

Province

Sindh

Country

Pakistan

Thesis Completing Year

2015

Thesis Completion Status

Completed

Subject

Computer Science

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/6890/1/Syed_Mustafa_Ali-Zaidi_Computing_HSR_2015_SZABIST_12-07-2016.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727783383

Asian Research Index Whatsapp Chanel
Asian Research Index Whatsapp Chanel

Join our Whatsapp Channel to get regular updates.

Similar


As the global stock of natural resources depletes the need of electricity efficient processes emerges. Laser cutting, an advance non-contact processing technique, outweighs the old methods such as hotwire and milling due to the requirement of retightening and replacement of cutting tools with time. Orthogonal array and Factorial design are selected as a design of experiment for modelling and optimization of Laser cutting process. The range adjustment of laser machine requires knowledge of experimental design, laser cutting process and material properties, otherwise missing values generate due to unsuccessful cutting. For this reason, many universities are unable to utilize these machines effectively. It is essential to formulate a technique which allows modelling the data with some missing values, consequently, it enhance the utilization of laser machines for research and other purposes. Initially, the qualities of output characteristic were modelled by Statistical and Neural network without missing values and then by supervised and novel Semi-supervised learning algorithms with missing values. The Statistical modelling results using one and two way analysis of variance with replication were better than other data mining techniques like linear and nonlinear regression, however, it is difficult to use these methods with missing values. Therefore, supervised neural network modelling is carried out and the effects of its parametric change are observed along the datasets size to model the orthogonal array. The neural network modelling results in edge quality and kerf width signal to noise ratio, it is acceptable, the edge quality indicates that modelling improves by pre-normalization, further improvement was made by increasing training data size to factorial design. It is observed that for the artificial neural network, supervised learning is not sufficient associated to orthogonal array, only due to edge quality mean modelling, average error were higher than the acceptable limit. The average error with factorial design was under 10%. The vast modelling experience of supervised learning engenders the development of novel Semi-Supervised learning algorithm. Consequently, the average error was reduced by utilizing the systematic randomize techniques to initialize the neural network weights and increase the number of initialization by using orthogonal array design of experiment, with up to 22% missing values. This algorithm reduces modelling time and cost thus reduces electricity consumption. The average error in Perspex sheet did not exceed 8.0% and 11.5% for edge quality and kerf width respectively. The overall quality was calculated by aggregation technique of data mining and a more generous and better aggregation is carried out by the novel combination of Fuzzy logic which provides overall quality for the customer while saving cost, time and Electricity.
Loading...
Loading...

Similar Books

Loading...

Similar Chapters

Loading...

Similar News

Loading...

Similar Articles

Loading...

Similar Article Headings

Loading...

مولانا سید عنایت احمد نقوی بدایونی

ایک صاحبِ علم کی وفات
مولوی سید عنایت احمد نقوی بدایونی
آج کل ہندوستان میں جب علوم مشرقی کے واقف کے کار روز بروز کم ہورہے ہیں، کسی پرانے صاحب علم کے سانحہ ارتحال پر دلی صدمہ ہوتا ہے، جوکہ ان کی جگہ جو آئیں گے وہ اپنے قدیم علوم کے اتنے واقف بھی نہ ہوں گے۔
بدایوں ہمیشہ سے فضل و کمال کا گھر رہا ہے یہیں ایک پرانا خاندان مولینا علاؤالدین اصولی کا تھا، مولینا ممدوح الشان علم ظاہر و باطن دونوں میں ممتاز تھے، اور یہ فخر کچھ کم نہیں کہ حضرت سلطان المشائخ نظام الدین اولیاء انکے شاگردوں میں تھے، فقہ حنفی میں قدوری مولینا سے پڑھی تھی، کہتے ہیں کہ بچپن میں وہ شیخ جلال تبریزی کے فیض سے مشرف ہوئے تھے، زہد و ورع اور فقر و فاقہ کی زندگی بسر کی، مگر کسی سے نذر و ہدیہ ضرورت سے زیادہ کبھی قبول نہیں فرمایا، اصولی کے لقب سے شہرت کے یہ معنی ہیں کہ وہ اصول فقہ میں کمال رکھتے تھے، زمانہ وفات معلوم نہیں لیکن بہر حال و ہ ساتویں صدی ہجری میں تھے۔
مولینا اصولی کی مبارک یادگار اس زمانہ میں مولوی سید عنایت احمد صاحب نقوی بدایونی تھے، افسوس ہے کہ موصوف نے ابھی پچھلے مہینہ ۲۳؍ رمضان ۱۳۵۸؁ھ کو بدایوں میں وفات پائی، ان کا بڑا علمی کارنامہ علامہ کمال الدین فارسی شاگرد علامہ محمود بن مسعود شیرازی کی تنقیح المناظر کے نسخوں کی تصحیح و مقابلہ ہے، تنقیح المناظر مشہور عالم بصریات (علم المرایا و المناظر) ابن ہیثم المتونی ۴۳۰؁ھ کے وسائل علم المناظر کی تلخیص و تشریح ہے، نواب عماد الملک مرحوم جو اسلامی علوم و فنون کے اس زمانہ میں سب سے بڑے قدردان تھے، ان کو ابھی کتاب کی اشاعت کی جو مسلمانوں کی علم نور اور علم بصر کی عظیم الشان...

اسلام اورہندومت میں احترام انسانیت ایک تقابلی جائزہ Respect for Humanity in Islam and Hinduism A Comparative Review

Every person in the world is respectable because he is a human being. All religions of the world have taught respect for humanity. It will not be wrong if we say that respect is the common heritage of humanity living in the world. Mutual respect is the secret and distinction of the development of nations. How many nations and cultures became enviable simply because they respected each other? In the present era, the dignity of humanity is being trampled everywhere. The murder market is hot everywhere. The standards of human respect are changing, sincerity, truth, human equality, and values ​​are being replaced by deceit, greed, envy, and selfishness. And it is done according to the resources. Man is the best of creation and legitimate respect and honor is his basic right. Therefore, no one can see his self-respect being undermined. That's why it has become very important to bring up topics like respect for humanity and explain the position and status of human beings in the light of religious books so that the respect and dignity of human beings are being trampled underfoot today, people should be made aware of the true status and status of human beings should be informed so that the importance of human blood can be estimated. An attempt will be made in this paper to present a comparative review regarding the respect and reverence that human has for Islam and Hinduism. Keywords: Respect for Humanity, Superior to all creatures, Religion, Islam, Hinduism, Respect, Self-respect

Agroforestry: A Viable Livelihood Option for Rehabilitation of Flood Affected Communities of the River Indus Basin.

Historically tree planting is an age-old land use system as the human evolution process, so NWFPs’ crucial role in rural livelihood, rural development and natural resource conservation has been presently recognized. This study investigated the agroforestry practices of farming communities in the Layyah and Kotaddu Tehsils in Muzaffargargh and Layyah districts southern Punjab Province of Pakistan. Purpose of this research is three fold: to establish site-specific NWFPs– livelihood linkages and to investigate the potential and constrains of the river Indus Basin to improve and sustainability of livelihoods and higher income generation. This is a handful research on the utilization of agroforestry for livelihood and its role in rehabilitation of flash flood concern on people. How could agroforestry be better utilized to improve the livelihoods, maintain the natural system resilience of forest-adjacent communities and to achieve the goal of conserving forest resources? The hypothesis of the study was farmers were more inclined toward agroforestry. Adoption of tree planting practices of farming communities were investigated in this study. However, this research used both experimental as well as survey research. How species performed under flooded condition were assessed through an experiment designed under CRD having three replicates. In order to gain information on how communities fetch their livelihoods through agroforestry, a survey research was conducted on 160 farmers equally (80 AF and 80 NAF) divided to practicing agroforestry and those who were not. The experiment was conducted to evaluate the effect of different irrigation sources and growth parameters of forest trees Shisham, Neem, Siri and Sufeda. The effect of different irrigation levels exhibited the highest plant height in Sufeda under flooding which were 135 and 125cm after and before the experiment. However, Neem showed maximum plant height after experiment (103 cm) under drought condition. But, the minimum plant height (57 cm) before experiment was observed in Sufeda under drought exhibiting 50% decline than Sufeda under flooding. Contrary to that Neem exhibited the maximum plant height before experiment (i.e 107 cm) under drought. The highest chlorophyll contents (73.51%) after experiment was observed in Sufeda under flooding and the lowest chlorophyll contents (7.32) after experiment was observed in Neem under flooding. Opposite to that Neem showed maximum chlorophyll contents (55.23%) under drought. Similarly, the maximum root dry weight (25.21 g) at the end of the after experiment in Sufeda under flooding observed. The highest dry shoot weight (27.63 g) was recorded in Sufeda under flooding. Whereas, the lowest dry shoot weight (4.25 g) was recorded in Sufeda under drought. Maximum root fresh weight (42.35 g) was recorded in Sufeda under flooding. Whereas, the minimum root fresh weight (5.52 g) was recorded in Sufeda under drought. In the same way the fresh shoot weight (51.23 g) was found in Sufeda where flooding was applied. While, in Neem the highest fresh shoot weight (42.75 g) was recorded under drought environment. It was hypothesized that rural people of these areas are more inclined than elsewhere in the province to practice agroforestry due to greater profitability than cropping. In place of agricultural crops which have low economic return, a comparison is made with A landholder survey was conducted to compare agroforestry and crop income. It was found that the majority of farmers were inclined to plant trees on their land. Low accessibility of institutional credit was a constraint for both AF (agroforestry farmers) and NAF (non-agroforestry farmers). However, among AF respondents only 24% were found to need credit for agroforestry practice, as against nearly 76% for crop production. Mostly farmers were found to have positive perceptions regarding agroforestry practice, because they understand the multiple benefits from growing trees, compared with cropping where they face various constraints, including poor access to credit, natural hazards, and meager support from local authorities. Further, this effort can generate farmer’s willingness through change in farmers’ perceptions and attitudes in the Indus River basin, resulting in motivation for agroforestry adoption.The hypothesis was “Homestead agroforestry system has tremendous potential to enhance the economy and livelihood of the area under study”. Results represent an average farm size, of households were 11.80 ha. The subsistence and economic landholding has a sizes of 5.06 ha and 11.80 ha, respectively. The prices of proceeds produced over the year in homestead forestry of study area were US$330.8. The results showed that 0.25 m3 timber was collected annually per farm out of which 0.07 m3 was consumed and the rest was sold. Average revenue generated by selling homestead timber was US $44.0. Revenue produced in subsistence, economic, and above economic farms were US$20.5, US$80.5, and US$95, respectively. Agroforestry has positive correlation on the farm income. The comparison of AF versus NAF revealed high farm income to the AF farmers than NAF. The AF farmers with low income (<100000) were about 7 (9%) but in NAF they were18 (22%). Similarly, the AF farmers with medium income (100000 – 200000) were 29 (36%) while in NAF it was 34 (42%). Also the farmers with high farm income were high in case of AF which is 44 (55%) than NAF where it is 38 (47%) indicating strong financial earning to the AF farmers than NAF farmers.This study is provide an idea and aims to explore the potential of agroforestry in the southern part of Punjab Province, Pakistan with intention to provide a landmark for future comparison of agroforestry and non-agroforestry adoption in field area and similar other areas having same conditions. The outcome provide support /guidance for government, policy designer, local authorities, progressive farmers, NGOs, researchers and farmers in number of ways for prudently adoption of agroforestry.