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Application of GIS for the identification and demarcation of selective heavy metal concentrations in the urban groundwater

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Journal of Geographical Sciences 2015年第2期25卷 225-235页

作者： Sobia ASHRAF Farhat ABBAS muhammad IBRAHIM Umer RASHID shoaib KHALID Hammad Raza AHMAD Khalid Rehman HAKEEM Tahir MAJEED Department of Environmental Sciences and Engineering Government College University Faisalabad (38000) Pakistan Institute of Advanced Technology Universiti Putra Malaysia UPM Serdang 43400 Selangor Malaysia Department of Geography Government College University Faisalabad 38000 Pakistan institute of Soil & Environmental Sciences University of Agriculture Faisalabad 38040 Pakistan Faculty of Forestry University of Putra Malaysia Serdang 43400 Selangor Malaysia Institute of Soil Chemistry and Environmental Sciences Ayub Agricultural Research Institute (AARI) Jhang Road Faisalabad

Groundwater is the most appropriate and widely used source of drinking water, which is increasingly threatened by pollution from industrial and agricultural activities. To check the severity of the problem, 156 groundwater samples were collected from various depths （60-110 ft） of 52 different localities in Faisalabad city, the third largest metropolis in Pakistan, and analyzed for the metals （Zn, Cu, Cd, Ni, Pb, Mn and Fe） concentration in 2009. Quantification was done by using Flame Atomic Absorption Spectrophotometer technique and the results were compared with WHO standards for drinking water quality. Results showed that the levels of Cu, Mn and Fe were below the WHO standards while the concentrations of Zn, Cd, Ni and Pb were above the recommended levels of safe drinking water. Correlation analysis among the occurrence of these heavy metals revealed a highly significant and positive correlation of Mn with Zn and Fe. A significant and positive correlation of Cd was also found with Cu and groundwater depth showing that there is strong association between Cu-Cd pair and that the Cd concentration varies with depth of groundwater in the study area. Regional patterns of heavy metals occurrence were mapped using Geographical Information System （GIS） for the identification and demarcation of risk areas. The concentration maps may be used by policymakers of the city to mitigate groundwater pollution.

关键词： heavy metals groundwater contamination Faisalabad pollution mitigation

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Alternate solutions for mine ventilation network to keep a preassigned fixed quantity in a working place

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International Journal of Coal Science & Technology 2015年第4期2卷 269-278页

作者： K. A. El-Nagdy A. M. shoaib Faculty of Petroleum and Mining Engineering SuezUniversity Suez 43721 Egypt

In underground constructions, a good ventilation design not only delivers fresh air to establish good working environment, but also provides a scientific and reliable basis to prevent disasters. In emergency cases, unexpected closure of the main airways may occur, providing the workers with alternative airways is substantial. This is important not only to sustain personnel lives, but also to prevent the mine ventilation system from damage. In this research, alternate solutions were introduced in case of failure in the underground construction to keep a pre-assigned fixed quantity in a working place for mine ventilation network. Eight different collapse scenarios were proposed to study their effect on the air quantity distribution among the branches in the ventilation circuit. From these scenarios, it is found that providing a sufficient air quantity in the working places could be achieved through modification of the network topology and adjusting the values of the regulators pressure. It is also indicated that the distance between the collapse and working places has a great effect on the amount of air delivered to it. A reduction in the power consumption could be done by re-arrange the installed regulators and decreasing the number of nodes and branches inside the network. A relationship representing the effect of changing the network topology on the total network power consumption was deduced through regression analysis. It is found that the total network power is quadratic dependent on the number of regulators and number of branches while it is directly dependent on the regulator power.

关键词： Mine ventilation network Power consumption through mine ventilation networks Regulators adjustment Nonlinear optimization Air flow control

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考虑可转移负荷效率的风/光/柴/蓄孤岛微网日运行能量控制优化策略

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中国电机工程学报 2018年第4期38卷 1045-1053页

作者：魏繁荣随权林湘宁李正天陈乐邓科薄志谦黄景光 muhammad shoaib Khalid Owolabi Sunday Adio 强电磁工程与新技术国家重点实验室(华中科技大学) 湖北省武汉市430074 国网湖北省电力公司检修公司湖北省武汉市430050 许继集团有限公司河南省许昌市461000

大型负荷尤其是可转移负荷的效率–功率特性常常被忽视,因此考虑风/光/柴/蓄微网系统的运行调度是不经济的。该文提出一种考虑可转移负荷效率的风/光/柴/蓄微网能量控制优化策略。首先以典型的可转移负荷——反渗透型制淡设备为例,建立... 详细信息

大型负荷尤其是可转移负荷的效率–功率特性常常被忽视,因此考虑风/光/柴/蓄微网系统的运行调度是不经济的。该文提出一种考虑可转移负荷效率的风/光/柴/蓄微网能量控制优化策略。首先以典型的可转移负荷——反渗透型制淡设备为例,建立包含设备工作全程的淡水输入–产出模型,实时计算其功率–效率特性曲线。在考虑制淡设备功率特性、蓄电池寿命（使用成本）、柴油机工作效率等因素的基础上,以燃料及蓄电池使用成本最少为目标,提出一种风/光/柴/蓄微网系统的日运行能量控制优化策略。通过与两种典型微网能量控制方案进行比较,仿真结果验证在包含可转移负荷的微网场景中,针对各种可能的储能设备和燃料的使用成本组合,在淡水需求量一定时,所提策略均具有较好的成本优势,为包含可转移负荷的微网经济运行策略制定提供了全新的视角。

关键词：可转移负荷制淡设备功率–效率特性使用成本能量控制优化

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和阻抗继电器的改进形式及其动作性能分析

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中国电机工程学报 2018年第7期38卷 2001-2011页

作者：吕冉李慧刘鹏林湘宁童宁李正天黄景光邓科 Owolabi Sunday Adio muhammad shoaib Khalid 韩雄辉强电磁工程与新技术国家重点实验室(华中科技大学) 湖北省武汉市430074 南方电网科学研究院有限责任公司广东省广州市510080 三峡大学电气信息学院湖北省宜昌市443002 国网湖北省电力公司检修公司湖北省武汉市430050 广东电网有限责任公司梅州供电局广东省梅州市514021

现有高压输电线路保护对于单相高阻接地故障灵敏度不足,长期以来一直是继电保护领域的一个遗留问题。该文根据线路双端测量阻抗之和在正常运行及单相故障场景下的差异性,针对原有和阻抗继电器不能动态适应线路电容电流变化的缺陷,提出... 详细信息

现有高压输电线路保护对于单相高阻接地故障灵敏度不足,长期以来一直是继电保护领域的一个遗留问题。该文根据线路双端测量阻抗之和在正常运行及单相故障场景下的差异性,针对原有和阻抗继电器不能动态适应线路电容电流变化的缺陷,提出一种改进和阻抗继电器,并设计能够保障其区内全线高阻接地速动能力的自适应浮动门槛。仿真结果证明所提出的原理实现简单、无需双端信息同步,能够快速响应区内任意故障点单相高阻故障,具备适应系统非全相运行能力,在绝大多数情况下,耐受过渡电阻能力均能达到300Ω。通过与现有主保护配合使用,可显著提升高压输电线路保护对各种系统运行工况下单相高阻接地故障的响应能力。

关键词：输电线路高阻接地改进和阻抗继电器过渡电阻自适应门槛

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Detection of a novel panel of 24 genes with high frequencies of mutation in gastric cancer based on next-generation sequencing

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World Journal of Clinical Cases 2022年第15期10卷 4761-4775页

作者： Hui-Hui Zeng Ze Yang Ye-Bei Qiu shoaib Bashir Yin Li Meng Xu Department of Oncology The First Affiliated Hospital of Jinan UniversityGuangzhou 510630Guangdong ProvinceChina Department of Medical Oncology The First Affiliated Hospital of Bengbu Medical CollegeBengbu 233004Anhui ProvinceChina Department of Oncology Jinan UniversityGuangzhou 510630Guangdong ProvinceChina

BACKGROUND Gastric cancer is a leading cause of cancer-related mortality *** somatic mutations have been identified based on next-generation sequencing;they likely play a vital role in cancer treatment ***,nextgeneration sequencing has not been widely used to diagnose and treat gastric cancer in the *** To test the mutant gene frequency as a guide for molecular diagnosis and personalized therapy in gastric cancer by use of next-generation *** We constructed a panel of 24 mutant genes to detect somatic nucleotide variations and copy number variations based on a next-generation sequencing *** custom panel included high-mutation frequency cancer driver and tumour suppressor *** genes were also analyzed using the cBioPortal *** clinical annotation of important variant mutation sites was evaluated in the ClinVar *** searched for candidate drugs for targeted therapy and immunotherapy from the OncoKB *** In our study,the top 16 frequently mutated genes were TP53(58%),ERBB2(28%),BRCA2(23%),NF1(19%),PIK3CA(14%),ATR(14%),MSH2(12%),FBXW7(12%),BMPR1A(12%),ERBB3(11%),ATM(9%),FGFR2(8%),MET(8%),PTEN(6%),CHD4(6%),and KRAS(5%).TP53 is a commonly mutated gene in gastric cancer and has a similar frequency to that in the cBioPortal database.33 gastric cancer patients(51.6%)with microsatellite stability and eight patients(12.5%)with microsatellite instability-high were *** analyses demonstrated that high-frequency mutated genes had transmembrane receptor protein kinase *** discovered that BRCA2,PIK3CA,and FGFR2 gene mutations represent promising biomarkers in gastric *** We developed a powerful panel of 24 genes with high frequencies of mutation that could detect common somatic *** observed mutations provide potential targets for the clinical treatment of gastric cancer.

关键词： Gastric cancer Next-generation sequencing Mutated genes Target sites Microsatellite instability

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Physical,Thermal and Partial Discharge Evaluation of Nano Alumina Filled Silicone Rubber in an Inclined Plane Test

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CSEE Journal of Power and Energy Systems 2022年第4期8卷 1242-1249页

作者： M.Tariq Nazir Faizan Tahir Butt Haider Hussain B.Toan Phung Shakeel Akram M.shoaib Bhutta Ghulam Yasin School of Engineering RMIT UniversityMelbourneVIC 3000Australiaand the School of Mechanical and Manufacturing EngineeringUniversity of New South Wales SydneyNSW 2052Australia School of Electrical Engineering and Telecommunications University of New South Wales SydneyNSW 2052Australia Institut d'Electronique et des Systès(IES) UMR 5214CNRSUniversitéde Montpellier34095 MontpellierFrance State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing UniversityChonging 400044China State Key Laboratory of Chemical Resource Engineering College of EnergyBeijing University of Chemical TechnologyBeijing 100029China

Silicone rubber(SiR)composite material is a modern-day insulator for high voltage outdoor *** imperfection attributed to SiR is its weak resistance to tracking and erosion when exposed to an outdoor polluted environment which reduces its operational *** paper investigates the performance of SiR with the addition of 0,1,2.5,5,10 and 20%by weight contents of nano alumina(Al_(2)O_(3)).Inclined plane tests are performed according to IEC 60587 using the step up tracking voltage method with an initial voltage of 3.0 kV and the contaminant solution flow rate is maintained at 0.3 ml/min using a peristaltic *** applied voltage level is increased at a rate of 0.25 kV/*** suggest that physical tracking,erosion,RMS leakage current and surface partial discharge(PD)performance of samples is improved with the addition of nano *** tracking length,eroded mass,RMS leakage current and average PD magnitude are measured 22%,79%,30%and 52%lesser in 20 wt%relative to 0 wt%,respectively.A thermal distribution analysis is undertaken with infrared camera and it is discovered that heat is accumulated in the discharge area of the liquid *** maximum temperature on the insulating specimen is decreased with increasing nanofiller *** above promising findings can be due to better thermal stability with low chain mobility at the interaction zone of SiR and ***,less liquid evaporation due to better thermal conduction and improved physical bonding between SiR and nano alumina are possible reasons behind the excellent performance of nanocomposites.

关键词： Alumina(Al_(2)O_(3)) dry band arcing(DBA) inclined plane test(IPT) infrared thermal analysis leakage current partial discharge(PD) silicone rubber(SiR) thermal properties

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保护用数据同步系统失效场景下线路主保护应急方案研究

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中国电机工程学报 2017年第22期37卷 6636-6648页

作者：陈乐林湘宁刘鹏吕冉李正天魏繁荣彭咏泉 muhammad shoaib Khalid 韩雄辉谷玉春吴通华强电磁工程与新技术国家重点实验室(华中科技大学) 湖北省武汉市430074 广东电网有限责任公司梅州供电局广东省梅州市514021 国网冀北电力又有限公司管理培训中心北京市102401 南瑞集团公司(国网电力科学研究院) 江苏省南京市211106

随着变电站的数字化和智能化,电量信息由点对点的模拟量传输逐步转变为网络化的数字量传输,因此数字信息的同步变得尤为重要。保护用数据同步系统失效后,不仅线路两侧的电气量无法准确比相,即使完全依赖本侧信息的测量量,如距离/方向信... 详细信息

随着变电站的数字化和智能化,电量信息由点对点的模拟量传输逐步转变为网络化的数字量传输,因此数字信息的同步变得尤为重要。保护用数据同步系统失效后,不仅线路两侧的电气量无法准确比相,即使完全依赖本侧信息的测量量,如距离/方向信息,因其依赖电压电流之间进行比相,也会输出错误结果。在此场景下,只能依赖电流速断和其他站的远后备保护实现对管辖区域内故障的保护,保护范围和动作速度都将显著变差。针对这一问题,基于拥有抗高阻故障能力且无需两侧信息同步的和阻抗继电器原理,提出无需相位信息的和阻抗模量保护判据和中段保护判据,结合电流速断保护,通过纵联通道的模量信息交互,形成保护用数据同步系统失效场景下的线路主保护应急方案,显著改善上述场景下的线路主保护性能。仿真算例验证所提方法的有效性和优越性。

关键词：智能变电站对时系统故障输电线路和阻抗继电器高阻抗接地故障

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The Influence of Depression on Different Age and Gender Groups in Bahawalpur

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Journal of Clinical and Nursing Research 2024年第7期8卷 196-207页

作者： Mehran Khan muhammad Shahbaz Tooba Waris shoaib Yaseen Iqra Afzal Emaan Khadim Sawera Usman muhammad Ismail Shah Sulaiman Aslam Zafar Iqbal Bahawalpur College of Pharmacy BMDC Complex63100PunjabPakistan

In Bahawalpur,a cross-sectional study assessed depression prevalence across age and gender groups,involving 442 participants from diverse socioeconomic backgrounds and *** the PHQ9 questionnaire,84%were found to meet depression *** findings revealed a higher incidence in females(88%)than males(79%),with the greatest disparity among young adults,particularly young women,due to factors like academic pressure and financial *** children had the lowest depression rates(68%),possibly due to better *** individuals exhibited more severe depression,likely related to aging and domestic *** study’s findings highlight a significant variation in depression severity across different demographic groups,with an overall higher incidence in *** research underscores the necessity for targeted mental health resources and interventions tailored to the specific needs of each demographic *** also points to the importance of addressing academic and socioeconomic stressors to mitigate depression,particularly among young *** the study provides valuable insights,it relies on self-reported data,which may introduce ***,future research should include clinical assessments to validate these findings and ensure a more accurate representation of depression within the community.

关键词： Influence Depression Different age Gender groups Bahawalpur

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Bio-capped and green synthesis of ZnO/g-C_(3)N_(4) nanocomposites and its improved antibiotic and photocatalytic activities: An exceptional approach towards environmental remediation

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Chinese Journal of Chemical Engineering 2023年第4期56卷 215-224页

作者： Iltaf Khan Chunjuan Wang shoaib Khan Jinyin Chen Aftab Khan Sayyar Ali Shah Aihua Yuan Sohail Khan Mehwish KButt Humaira Asghar School of Environmental&Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China College of Agriculture Shihezi UniversityShihezi 832003China Key Laboratory of Biology and Genetic Improvement of Horticultural Crops Northeast Agricultural UniversityHarbin 150030China Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits and Vegetables College of AgronomyJiangxi Agricultural UniversityNanchang 330045China Department of Pharmacy University of SwabiKhyber Pakhtunkhwa 94640Pakistan Department of Physics University of Agriculture FaisalabadFaisalabad 38040Pakistan Department of Chemistry Government College University FaisalabadFaisalabad 38000Pakistan

In this research study, we have synthesized the bio-capped ZnO/g-C_(3)N_(4) nanocomposites by employing lemon juice(Citrus limon) as a stabilizer and mediator. Fruitfully, lemon juice which contains various acidic functional groups and citric acid has the capability to block the surface of g-C_(3)N_(4) from chemical reactivity and activated the surface of g-C_(3)N_(4) for various reactions. Consequently, the agglomeration behavior and controlled shape of g-C_(3)N_(4) has also been achieved. Our experimental results i.e. XRD,TEM, HRTEM, PL, FS, XPS, and PEC have confirmed that the lemon juice mediated and green g-C_(3)N_(4)(L-CN) have good performances and remarkable visible light photocatalytic activities as compared to the chemically synthesized g-C_(3)N_(4)(CN). Furthermore, the small surface area and low charge separation of g-C_(3)N_(4) is upgraded by coupling with Zn O nanoparticles. It is proved that the coupling of Zn O worked as a facilitator and photoelectron modulator to enhance the charge separation of g-C_(3)N_(4). Compared to pristine lemon-mediated green g-C_(3)N_(4)(L-CN), the most active sample 5Zn O/L-CN showed ~ 5-fold improvement in activities for ciprofloxacin(CIP) and methylene blue(MB) degradation. More specifically,the mineralization process and degradation pathways, and the mineralization process of ciprofloxacin(CIP) and methylene blue(MB) are suggested. Finally, our present novel research work will provide new access to synthesize the eco-friendly and bio-caped green g-C_(3)N_(4)nanomaterials and their employment for pollutants degradation and environmental purification.

关键词： Bio-caped green g-C_(3)N_(4) Lemon juice mediators ZnO/g-C_(3)N_(4)nanocomposite Environmental remediation Degradation pathways

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基于综合贝瑞隆模型的和导纳保护判据

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中国电机工程学报 2024年

作者：武文昊翁汉琍林湘宁陈永昕李正天 muhammad shoaib Khalid 三峡大学电气与新能源学院华中科技大学强电磁工程与新技术国家重点实验室国网湖北电力有限公司电力科学研究院 FAST National University of Computer and Emerging Sciences

纵联主保护是电网安全的第一道防线。随着电网新能源渗透率的提高，距离、方向类保护均存在一定的误动风险，在某些场合甚至被迫退出运行，更加凸显了纵联主保护的重要性。若两侧同步采样条件无法保证，目前占据主导地位的电流差动保护... 详细信息

纵联主保护是电网安全的第一道防线。随着电网新能源渗透率的提高，距离、方向类保护均存在一定的误动风险，在某些场合甚至被迫退出运行，更加凸显了纵联主保护的重要性。若两侧同步采样条件无法保证，目前占据主导地位的电流差动保护将被迫退出运行，而不依赖同步采样的和阻抗保护存在无法选相动作等缺陷。为此，本文提出一种基于综合贝瑞隆模型的纵联主保护判据-和导纳保护判据：选定线路参考点，基于经典贝瑞隆模型和两端本地电压、电流，推演得到线路参考点处的电压、电流，计算参考点两侧导纳并求和形成动作量，该动作量在正常运行和区外故障时均为零，而区内故障时，一般均有足够的动作量，由此能够正确区分区内外故障；针对基于经典贝瑞隆模型的保护判据无法选相的问题，提出一种基于同序贝瑞隆模型的选相判据，将经典贝瑞隆模型中的零序参数替换为正序参数，即可避免健全相判据出现动作量，同时保留了故障相判据具有显著动作量的优点，实现了对区内故障的正确选相。所提判据不依赖两侧数据同步，并具有优异的耐受过渡电阻能力。对比算例仿真验证了所提判据的有效性和优越性。

关键词：和导纳贝瑞隆模型纵联保护采样同步选相跳闸

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