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Improving the transition capability of the low-voltage wind turbine in the sub-synchronous state using a fuzzy controller

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Clean Energy 2022年第4期6卷 682-692页

作者： Ngakan Ketut Acwin Dwijendra Abduladheem Turki Jalil azher mabed Bashar SBashar Ahmed Kateb Jumaah Al-Nussairi Ali Thaeer Hammid Ali Shamel Khusniddin Fakhriddinovich Uktamov Faculty of Engineering Udayana UniversityBaliIndonesia80361 Faculty of Biology and Ecology Yanka Kupala State University of Grodno230023 GrodnoBelarus College of Technical Engineering The Islamic UniversityNajafIraq Department of Air Conditioning and Refrigeration Al-Mustaqbal University CollegeBabylonIraq Al-Nisour University College BaghdadIraq Al-manara College for medical Sciences MaysanIraq Computer Engineering Techniques Faculty of Information TechnologyImam Ja’afar Al-Sadiq UniversityBaghdadIraq Department of Chemistry Ardebil BranchIslamic Azad UniversityArdebilIran ‘Economic Security’Department Tashkent State University of EconomicsTashkent CityUzbekistan

The main problem of wind turbines is associated with induction generators in their power supply during short circuits in the *** this research,a new method is presented for the uninterrupted operation of a wind turbine equipped with an induction generator fed on both sides of feeding during network *** farms equipped with a doubly-fed induction generator(DFIG)require two abilities to allow system operators to increase *** capabilities include fault ride-through and synchronization of output force fluctuations,especially when these generators generate significant electrical power.A mATLAB®software environment has been used to evaluate and improve the performance of these turbines.A fuzzy complement(FC)controller is used to improve the performance of the *** results demonstrate that this controller limits the operation of the turbine current and voltage in the short-circuit mode *** results obtained from comparing two different modes,it can be said that ripple is 4%in the FC mode,while this parameter is equal to 10%for the proportional-integral controller.

关键词： wind turbine sub-synchronous performance fuzzy controller mATLAB

Structure of the Venom Apparatus of Large Carpenter Bees, Xylocopa fenestrata （Fabricius）（Hymenoptera： Apidae）

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Journal of Agricultural Science and Technology(A) 2012年第2期2卷 259-264页

作者： Farzana Perveen Sardar azher mehmood Samina Yasmin Department of Zoology Hazara University Garden Campus Mansehra 21300 Pakistan

The venom apparatus in the large carpenter bees, Xylocopafenestrata （Fabricius）（Hymenoptera： Apidae） has been studied It consists of typical parts, i.e., the venom sac, free filament, Dufour gland, sting shaft and accessory sclerites. It is highly sclerotized and concealed by the 7th abdominal tergite and sternite. The venom sac serves as a reservoir for the venom which synthesized by the convoluted gland present in it, which is remarkably uniform to that of ants. The median duct extends from lower portion of venom sac, which measures 2.5 ±0.17 mm （mean ＋ SD）（n = 20） in length. The Dufour gland is a tube-like structure which is inserted in the sting-bulb. The triangular plate is attached at terminal portion of rami, which is in turn attached with lancets. The gonostyli are paired long and tubular structure with 5.29 ± 0.23 mm （n = 20） in length. The sting length is 5.29 ±0.23 mm （n = 20）. The fulcral arm is well-developed with an inverse Y-shaped structure present beneath the sting-bulb. Barbs on the sting shaft are weakly developed in X fenestrata but well developed in ants. The venom apparatus ofX. fenestrata when compared is similar to the bees but differs from that of the wasps and ants.

关键词： Apidae hymenoptera large carpenter bees venom apparatus.

Biological Status of Indus River Dolphin （Platanista minor Owen） in Indus River, Northern Pakistan

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Journal of Life Sciences 2011年第1期5卷 39-47页

作者： Farzana Perveen Sardar azher mehmood Shabbir Ahmed Zia Ur Reman Department of Zoology Hazara University Garden Campus Mansehra-21300 Pakistan

A study was aimed to determine the biological status of the Indus river dolphin, Platanista minor Owen in Indus river with respect to distribution, threats and protection throughout its range in Northern Pakistan. For this purpose, a survey was conducted in an area of 103.5 km including the Indus river and its tributaries in march 2009 for estimating its distribution and population size using both direct observations of the dolphin as well as indirect evidences from its signs. The best group size was estimated with an abundance of 54 dolphins. Approximately 53.7% （1.07 dolphin＆m） of the dolphin-population occurred in 27 km from miran onward to Ramak, however, 38.9% （0.46 dolphin/km） occurred in 46 km from Dera Ismail （D.I.） Khan bridge to miran, moreover, 7.4% （0.13 dolphin/kin） occurred in 30.5 km from Saggu, near meetapur-village to D.I. Khan bridge in the Indus river. The highest density was found between miran and Ramk. A pronounced increase in dolphin encounter rate and abundance were observed in a downstream-direction. Threats to dolphins include too much vessel-traffic, disturbance by the crane, duck-hunters, and no effective-protection. Dolphins are particularly vulnerable to the high levels of anthropogenic activities because of their restricted habitat. Threats vary geographically in their importance, but generally include accidental killing during fishing-operations, habitat-loss and population-fragmentation from water development. Deliberate killing for dolphin products also threatens the dolphins. Potential for protections and possibilities for dolphin eco-tourism measures must be taken.

关键词： Dolphin endangered or critically endangered Indus river Northern Pakistan protection population.

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不同钾钠处理对西瓜生长和生理的影响

中国瓜菜 2016年第12期29卷 14-18页

作者：焦妍妍陈晨 muhammad azher Nawaz 别之龙黄远园艺植物生物学教育部重点试验室.华中农业大学园艺林学学院武汉430070

以‘早佳’(8424)西瓜为供试材料,在6 mmol·L^(-1)K+0 mmol·L^(-1)Na、0.01 mmol·L^(-1)K+0 mmol·L^(-1)Na、0 mmol·L^(-1)K+0.01 mmol·L^(-1)Na、0.01 mmol·L^(-1)K+5.99 mmol·L^(-1)Na、0 mmol·L^(-1)K+0.01 mmol·L^(-1)Na、6 mmol·L^(-1)K+6 mmol·L^(-1)Na条件下水培处理10 d,分别测定植株干质量,叶绿素含量、光合速率、气孔导度、K、Na浓度。结果表明,以正常供钾(6 mmol·L^(-1)K+0 mmol·L^(-1)Na)为对照,0.01 mmol·L^(-1)K+0 mmol·L^(-1)Na和0 mmol·L^(-1)K+0.01 mmol·L^(-1)Na处理下西瓜植株的干质量、光合速率和钾浓度的降低程度相当,叶片干质量分别下降了57%和58%,表明低浓度的钠起到了代替钾生理功能的作用;相反,0.01 mmol·L^(-1)K+5.99 mmol·L^(-1)Na和0 mmol·L-1K+6 mmol·L^(-1)Na处理加重了低钾胁迫对西瓜植株生长的抑制作用,植株干质量和光合速率显著下降,叶片干质量分别下降了63%和67%,光合速率下降了66%和68%,表明低钾下较高浓度的钠对西瓜产生了毒害作用;6 mmol·L^(-1)K+6 mmol·L^(-1)Na处理对西瓜植株的干质量无显著影响,但光合速率和钾浓度有所降低,光合速率下降了28%,表明正常钾水平下较高浓度的钠对植株具有一定伤害,但比低钾下钠的伤害要轻。本研究结果表明,低浓度的钠能代替钾的部分生理功能,而较高浓度的钠会对植株产生伤害,尤其是西瓜植株处于较低钾水平的情况下。

关键词：西瓜钾钠光合作用矿质营养

Effectiveness of medical management in Spontaneous Expulsion of Lower Ureteral Calculi: A Prospective Study

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Surgical Science 2016年第7期7卷 321-324页

作者： azher mushtaq Sheikh Imran Farooq malik Suhail Ahmad Fahad ul Islam mir Yassar Arafat Government medical College Srinagar India

Purpose: We evaluated the efficacy of combined drug therapy with alpha1-adrenergic antagonist tamsulosin and corticosteroid deflazocort for conservative expulsive therapy in patients with lower ureteric calculi. materials and methods: A total of 100 consecutive symptomatic patients with stones located in the Lower ureter were selected for the study who received oral tamsulosin 0.4 mg daily for 4 weeks and deflazocort 30 mg daily for 10 days and diclofenac Im/Oral on demand. Ultrasound follow-up and medical visits and X ray KUB were performed weekly for 4 weeks. Stone passage rate and time, pain episodes and endoscopical intervention were evaluated. Results: The stone expulsion rate was 87.8%. mean stone size was 6.5 ± 2.14 mm. mean expulsion time was 8 ± 1.84 days. mean pain episodes were 1.50 ± 0.87 days. 11 patients needed intervention for stone retrieval. There was no statistically significant difference between the expulsion rates of right and left ureteral stones (P value = 0.31). Conclusions: medical therapy with a combination of α1 adrenergic blocker and corticosteroid achieve good stone expulsion rates, lower pain episodes and should be considered in all patients with lower ureteral stones of size less than 10 mm who are not having any contraindications for medical therapy.

关键词： Tamsulosin KUB Stone Ureteric Calculi

Assessment of Extent and Severity of Pellet Induced Abdominal Injuries, a Rare Variant of Weapon Violence: A Prospective Study

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Surgical Science 2016年第10期7卷 475-483页

作者： azher mushtaq Atif Naeem Raja Hilal Ahmad Wani Shaukat A. Jeelani Nazia Hilal Ishfaq Ahmed Gilkar Government medical College Srinagar India

Background: The use of a Pellet gun, a form of short gun used for mob control in many conflict zones, has posed a serious challenge to the surgeons in assessing the extent of trauma caused by these pellets. Objectives: To study the role of conventional available investigations for trauma like ultrasonography and computed tomography scans in assessing the severity of the injuries caused by the pellets. methodology: 50 patients having pellet injuries predominantly in abdomen without other associated trauma were included in the study. The decision for surgery was taken on the basis of clinical and CECT (Contrast Enhanced Computed Tomography) findings and these findings were then compared with intra-operative findings. Results: 30/50 patients were decided to be operated on the basis of Clinical and CECT findings. On exploration, it was observed that 18/33 patients really needed exploration while as 15/33 patients could have been managed conservatively. This was observed in next 20/50 patients who were put on conservative management with similar CECT findings. Of these 20 patients, 17 did well while as 3 were explored later in view of developing peritonitis and were found to have small bowel perforations. Conclusion: Conventional investigations for trauma like FAST and CECT abdomen are not ideal for assessing the severity of pellet induced abdominal visceral injuries which result in high rate of unnecessary laparotomies. Also the abdominal pellet trauma patients can be well managed conservatively until hemodynamically stable even though CT scan shows pellet penetration into peritoneal cavity or bowel lumen.

关键词： Pellets Bowel Perforation Laparotomy

Cloning and Characterization of a Tyrosine Aminotransferase( TAT)Gene in Gerbera hybrida

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Asian Agricultural Research 2018年第2期10卷 46-50,63页

作者： Nigarish mUNIR min Kyaw THU muhammad azher NAWAZ Yuling LIN Chunzhen CHENG Zhongxiong LAI Institute of Horticultural Biotechnology Fujian Agriculture and Forestry University Fuzhou 350002 China Key Laboratory of Horticultural Plant Biology Ministry of Education/College of Horticulture and Forestry Sciences Huazhong Agricultural University Wuhan 430070 China Department of Horticulture University College of Agriculture University of Sargodha Sargodha 350002 Pakistan

In our previous study,a gene predicted to encode a Tyrosine aminotransferase( TAT) was found to be significantly up-regulated in root rot diseased Gerbera by transcriptome sequencing. To confirm the genes and investigate the function,we cloned the gene by RT-PCR and then conduct bioinformatic analyses. In this study,a 1 537 bp long c DNA sequence of this gene( named as Gh TAT) was firstly cloned,which contained a coding region of 1 233 bp,which was predicted to encode a protein of 410 amino acids. Bioinformatic analysis showed that the Gh TAT was a stable hydrophobic protein without signal peptide. Subcellular location prediction result indicated that this protein located in chloroplast,which is the biosynthesis position of tyrosine and the derived products of tyrosine biosynthesis pathway. moreover,typical Tyrosine aminotransferase domain was found in this protein,indicating that it is a TAT. According to the TAT-based phylogenetic analysis and similarity analysis,the closest relationship and highest similarity was found between Gh TAT and Halianthus annuus TAT,which again verified the TAT property of Gh TAT. Tyrosine aminotransferase( TAT) is the first enzyme in tyrosine biosynthesis pathway,whose products include many antioxidant substances such as tocopherols and tocotrienols. The up-regulation of Gh TAT in root rot diseased gerbera suggests that it may play an important role in response to the root rot pathogen infection. In addition,60 phosphorylation sites( accounting for 14. 6%) were found in this protein,suggesting that the expression of this protein and its encoding gene were greatly influenced by the phosphorylation reactions.

关键词： Cloning Characterization Tyrosine aminotransferase Gerbera hybrida

Comprehensive mineral Nutrition Analysis of Watermelon Grafted onto Two Different Rootstocks

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Horticultural Plant Journal 2016年第2期2卷 105-113页

作者： HUANG Yuan ZHAO Liqiang KONG Qiusheng CHENG Fei NIU mengliang XIE Junjun muhammad azher Nawaz BIE Zhilong College of Horticulture and Forestry Sciences Huazhong Agricultural University Key Laboratory of Horticultural Plant Biology Ministry of Education

Grafting is a widely used practice in fruit-bearing vegetables. However, why grafting affects plant growth, fruit yield, and quality, especially from the aspect of mineral nutrition, remains unclear. In this study, watermelon cultivar ‘Zaojia 8424' was grafted onto bottle gourd ‘Jingxinzhen1'(Lagenaria siceraria) and pumpkin ‘Qingyanzhen 1'(Cucurbita maxima × C. moschata). Non-grafted plants were used as the control. Results show that rootstock grafting significantly increases plant growth and single fruit weight of watermelon. Watermelon grafted onto rootstocks, especially pumpkin, exhibits significantly higher root volume, root surface area, and number of root tips and forks in comparison with non-grafted plants. Fruit flesh, rind firmness, and rind thickness were enhanced by grafting. However, fruit soluble solids and taste significantly decreased in plants grafted onto pumpkin. The total uptake(mg · plant^(-1)) and concentration(mg · g^(-1)DW) of N, K, Ca, Fe, mg, and mn in root, stem, leaf,fruit rind, and flesh were generally higher in grafted plants compared to non-grafted ones, especially for N of pumpkin rootstock-grafted *** total uptake of nutrients of plants grafted onto bottle gourd and pumpkin was increased by 30.41% and 49.14% at fruit development stage and by 21.33% and 47.46% at fruit maturation stage, respectively, compared with non-grafted plants. We concluded that watermelon grafting onto suitable rootstocks can increase the uptake of mineral nutrition, especially for N in the pumpkin rootstock grafted plants, thereby affecting plant growth, fruit yield, and quality.

关键词： watermelon grafting rootstock mineral element fruit quality nitrogen

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南瓜砧木嫁接提高西瓜对低镁环境的适应性

中国瓜菜 2019年第8期32卷 235-236页

作者：黄远别之龙焦妍妍 muhammad azher Nawaz 陈晨刘力陆珍孔秋生程菲华中农业大学园艺林学学院·园艺植物生物学教育部重点实验室

目的与意义:镁(mg)是一种重要的矿质元素,在植物的许多生理和生化过程中起着重要作用.然而,在全世界范围内,作物经常发生缺镁的问题.西瓜作为一种重要的园艺作物,经常遭受低镁的危害.本研究旨在分析是否可以通过合适的砧木嫁接,来改善... 详细信息

目的与意义:镁(mg)是一种重要的矿质元素,在植物的许多生理和生化过程中起着重要作用.然而,在全世界范围内,作物经常发生缺镁的问题.西瓜作为一种重要的园艺作物,经常遭受低镁的危害.本研究旨在分析是否可以通过合适的砧木嫁接,来改善低镁条件下西瓜的生长,并阐明其潜在的生理机制.

关键词：砧木嫁接缺镁西瓜适应性环境南瓜园艺作物生理机制