Sindh University Research Journal最新文献_第9页

Developing a Computational Syntax of Sindhi Language in Lexical Functional Grammar Framework 在词法功能语法框架下发展信德语计算语法

Sindh University Research Journal Pub Date : 2017-12-19 DOI: 10.26692/SURJ/2017.12.49

M. U. Rehman, H. U. Kazi

引用次数: 0

Harmonics compensation in industrial power network using Hybrid Active Power Filter (HAPF) in d-q frame 基于d-q帧的混合有源电力滤波器(HAPF)在工业电网中的谐波补偿

Sindh University Research Journal Pub Date : 2017-12-19 DOI: 10.26692/SURJ/2017.12.76

S. Katyara, M. Shah, L. Staszewski, J. Soomro

{"title":"Harmonics compensation in industrial power network using Hybrid Active Power Filter (HAPF) in d-q frame","authors":"S. Katyara, M. Shah, L. Staszewski, J. Soomro","doi":"10.26692/SURJ/2017.12.76","DOIUrl":"https://doi.org/10.26692/SURJ/2017.12.76","url":null,"abstract":"In AC power networks, the use of harmonic and reactive power compensations through active power filters has become emerging aspect of today’s commercial market. With the advancement of new technologies, loads based on power electronics are regularly being used in low and medium voltage distribution systems, which eventually cause the harmonics in the system currents and voltages. The most dangerous harmonics are the later i-e, 3rd , 5th , 7th and so on, which are basically result of current harmonics. They cause degradation in the performance and working of other important power system equipment. In order to mitigate these daunting harmonics, the best option is to use the hybrid power filters which combine the characteristics of both active and passive harmonic filters al-together. The main idea of this research is to model an industrial network and to perform an analysis over the Total Harmonic Distortion (THD) in the power system. The use of Hybrid Active Power (HAPF) kept the THD value well below 8%, as recommended by European Standard EN50160. With the implementation of HAPF, an additional advantage of power factor improvement was also achieved. PQ theorem was used for calculating parameters of hysteresis control used for filter implementation. Results presented in the research paper confirm the efficiency of designed filter because the THDs of both voltage and current were restricted to 2% and the system power factor was improved too. The major contribution of this research is that power quality was improved most economically using P-Q technique through HAPF.","PeriodicalId":21859,"journal":{"name":"Sindh University Research Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75013596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A Pivot Rule for Maximization Degeneracy Problems of Simplex Method for Linear Programming Problems 线性规划问题中单纯形法最大退化问题的枢轴准则

Sindh University Research Journal Pub Date : 2017-12-19 DOI: 10.26692/Surj/2017.12.40

R. K. Menghwar, F. Shaikh

{"title":"A Pivot Rule for Maximization Degeneracy Problems of Simplex Method for Linear Programming Problems","authors":"R. K. Menghwar, F. Shaikh","doi":"10.26692/Surj/2017.12.40","DOIUrl":"https://doi.org/10.26692/Surj/2017.12.40","url":null,"abstract":"The simplex algorithm is a powerful technique, widely used to find the optimal solution of linear programming problems. Pivot rule is the most important first step of the simplex algorithm in the maximization degeneracy problems of LP for selecting the entering variable/work column (to obtain the smallest ratios) and after than leaving variable for pivot equation. The selection of an effective pivot rule leads the smallest number of iterations of the optimal solution of L.P. The selecting of most negative number (for entering variable) in the maximization problems is known as G.B Dantzig's pivot rule. The purpose of this paper is to model an algorithm that improves in the entering and leaving variable for the maximization degeneracy problems of LP. In this article, we have introduced a powerful technique for pivot rule which reduces the number of iterations to obtain the optimal solution as compare to Dantzig’s pivot rule. This article gives better concept of selection the entering variable as well leaving variable. This article also gives a helpful imminent into the unique and constructive performance of the proposed method by coverage computational experiments.","PeriodicalId":21859,"journal":{"name":"Sindh University Research Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79409571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Attenuation of Free Space Optical Communication under Dusty Conditions in Lahore 拉合尔沙尘条件下自由空间光通信的衰减

Sindh University Research Journal Pub Date : 2017-12-19 DOI: 10.26692/Surj/2017.12.75

S. M. Yasir, M. T. Mushtaq, M. S. Khan, W. A. Salam, M. Ehsan, H. Nawaz

引用次数: 2

Effect of Watercourse Lining on Water Distribution (Warabandi) in the Command Area of Laiqpur Ex Ali Bahar Minor, District Sujawal, Sindh, Pakistan 巴基斯坦信德省Sujawal地区laqpur Ex Ali Bahar Minor指挥区河道衬砌对水分布(Warabandi)的影响

Sindh University Research Journal Pub Date : 2017-12-19 DOI: 10.26692/Surj/2017.12.62

Nabi Bux Bhatti, Abdul Latif Qureshi, G. S. Solangi, S. Panhwar

{"title":"Effect of Watercourse Lining on Water Distribution (Warabandi) in the Command Area of Laiqpur Ex Ali Bahar Minor, District Sujawal, Sindh, Pakistan","authors":"Nabi Bux Bhatti, Abdul Latif Qureshi, G. S. Solangi, S. Panhwar","doi":"10.26692/Surj/2017.12.62","DOIUrl":"https://doi.org/10.26692/Surj/2017.12.62","url":null,"abstract":"A study was carried out to evaluate the impact of watercourse lining on water distribution (warabandi).For this study two watercourses, one lined (8-CL) and other unlined (11-R) of Laiqpur ex-Ali Bahar Minor were selected.The Theil’s Index was calculated on the basis of various parameters such as NIA (Net Irrigated Area), NWA (Net Wetted Area), CCA (Cultivable Command Area) and frequency of irrigation, actual TWA (Total Wetted Area) and predicted TWA (Total Wetted Area) and found as 0.22 and 0.496 for lined and unlined watercourses respectively. Hence, the effectiveness of warabandi was found as 78 and 50.4% for lined and unlined water courses respectively. The Theil’s Index values for head (31.07 acres), middle (31.76 acres) and tail (28.35 acres) sections of one lined and two unlined sections of the lined watercourse were determined as 0.147, 0.165 and 0.319 respectively, however for unlined watercourse, the Theil’s Index values were 0.21 (head), 0.5 (middle) and 0.6 (tail). This showed that in a lined section of the watercourse No. 8-CL, the effectiveness of warabandi was 85%, at its tail section it was 68% and that for tail section of the earthen w/c was only 40%. Variation of TIC in lined and unlined watercourse was 0.17 and 0.38 respectively. The conveyance loss per 1000 ft. in lined and unlined sections of watercourse 8-CL was 1.23% and 4.92% respectively, however in watercourse 11-R that was 4.9%. The conveyance efficiency in lined and unlined sections of the lined watercourse was98.76 and 90.60% and that for earthen watercourse was 70.59% and after lining, the cropping intensity increased up to 8%.","PeriodicalId":21859,"journal":{"name":"Sindh University Research Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80513701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

VBEML: Virtual Breeding Environment Modeling Language 虚拟育种环境建模语言

Sindh University Research Journal Pub Date : 2017-12-19 DOI: 10.26692/SURJ/2017.12.51

S. Pathan, N. J. Rajper, H. A. Nizamani

引用次数: 0

Robust Speech Recognition Using Adaptive Noise Cancellation 基于自适应噪声消除的鲁棒语音识别

Sindh University Research Journal Pub Date : 2017-12-19 DOI: 10.26692/SURJ/2017.12.78

M. Waqas, M. A. Khan, M. Naeem, Asma Gul, Nasir Ahmad

引用次数: 0

Effect of bi-solvents on the Morphology of CuO Nanostructures Using Soft Template 双溶剂对软模板CuO纳米结构形貌的影响

Sindh University Research Journal Pub Date : 2017-12-19 DOI: 10.26692/SURJ/2017.12.71

M. A. Kalhoro, Z. Ibupoto, A. Chandio, K. A. Kalhoro, Qurrat-ul-Ain Baloach

引用次数: 0

Generation mean analysis of some Physiological Traits Contributing to heat Tolerance in Upland Cotton (Gossypium Hirsutum L.) 陆地棉耐热性生理性状的代均值分析

Sindh University Research Journal Pub Date : 2017-12-19 DOI: 10.26692/Surj/2017.12.61

K. Hussain, A. Qayyum

引用次数: 0

On the Performance analysis of image Dehazing using fuzzy theory and Artificial Neural Networks 基于模糊理论和人工神经网络的图像去雾性能分析

Sindh University Research Journal Pub Date : 2017-12-19 DOI: 10.26692/Surj/2017.12.54

N. Minallah, I. Ullah, M. Ashfaq, H. Mahesar

引用次数: 0