检索结果-南通市图书馆

维普期刊数据库

Decision Model of Transmission Capacity Based on Expected Quantile for Wind Farm

在线全文

学校读者我要写书评

暂无评论

太原理工大学学报 2024年

作者： Mst sharmin Kader Riyadzh Mahmuudh Xiaoqing Han Li Tingjun College of Electrical and Power Engineering.Taiyuan University of Technology Taiyuan University of Technology

The new energy generation represented by wind power is the most realistic strategic choice to achieve the goals of carbon peaking and carbon neutrality. To absorb renewable energy electricity in power grids a new probabilistic evaluation method for available transmission capacity in transmission systems is proposed based on joint cumulants， and a decision model for risk available transmission capacity based on expected quantiles is proposed accordingly. As a vital component of ATC calculation， the transmission reliability margin (TRM)， as a reserved transmission capacity， reflects the impact of uncertainty factors on transmission capacity. However， in traditional calculation methods， TRM is determined through deterministic or probabilistic methods， which is difficult to reflect the risks brought by large-scale wind power consumption to ATC and cannot meet the requirements for transmission capacity risk management. Firstly， to address the issue that the cumulative method requires variables to be independent of each other and cannot consider the correlation of wind power output， a joint cumulative method combined with FGM Copula function is proposed to characterize the correlation of wind power output; Secondly， for the probabilistic assessment of available transmission capacity， a probabilistic assessment model for available transmission capacity is established by combining the partition integration method and the Comish Fisher expansion; Finally， in response to the problem that decision methods based on value at risk only consider the probability achieved at the tail of the probability distribution and cannot describe the risks generated throughout the distribution， a risk available transmission capacity index based on expected quantiles is proposed， and its evaluation process is proposed. Verify the feasibility and practicality of the proposed indicators and models through case analysis.

关键词：

Relationship between Seed Priming Mediated Seedling Vigor and Yield Performance of Spring Wheat

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2024年第6期93卷 1159-1177页

作者： Md.Parvez Anwar Masuma Akhter sharmin Aktar Sinthia Afsana Kheya A.K.M.Mominul Islam Sabina Yeasmin Ahmed Khairul Hasan Md.Harun Or Rashid Department of Agronomy Bangladesh Agricultural UniversityMymensingh2202Bangladesh

Seed priming is a pre-germinated technique that can enhance seed germination percentage,faster and synchro-nized germination,better seedling growth,and yield under stress *** ascertain the most effective seed priming method that would ensure the potential yield of wheat in Bangladesh,two experiments were carried out from December 2021 to March 2022 at the Department of Agronomy,Bangladesh Agricultural *** wheat varieties namely BARI Gom-28 and BWMRI Gom-1 were subjected to a range of priming chemicals in both lab and pot *** compounds included the following:control(no priming),hydropriming(distilled water),10000 ppm KNO_(3),15000 ppm KNO_(3),40000 ppm Mannitol,60000 ppm Mannitol,10000 ppm NaCl,20000 ppm NaCl,100 ppm PEG,150 ppm PEG,500 ppm NaOCl,1000 ppm NaOCl,10000 ppm CaCl_(2),20000 ppm CaCl_(2),10000 ppm KCl and 20000 ppm KCl.A complete randomized design(CRD)with three repli-cations was used to set up the *** results showed that BARI Gom-28 and BWMRI Gom-1 responded best to KCl priming in terms of rapid seed germination and strong seedling *** the other hand,the best priming agents for plant growth and productivity turned out to be CaCl_(2) and *** results of this study support the possibility of using seed priming as a technique to improve wheat plant development and output by raising seed emergence and survival rates.

关键词： Priming seedling percentage germination growth yield wheat

Zoonotic human liver flukes,a type 1 biocarcinogen,in freshwater fishes:genetic analysis and confirmation of molluscan vectors and reservoir hosts in Bangladesh

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Infectious Diseases of Poverty 2024年第3期13卷 73-88页

作者： sharmin Shahid Labony Md.Abdul Alim Muhammad Mehedi Hasan Md.Shahadat Hossain sharmin Akter Joydeep Paul Thahsin Farjana Md.Haydar Ali Mohammad Zahangir Alam Takeshi Hatta Hayato Kawada Keiko Mizutani Naotoshi Tsuji null Anisuzzaman Department of Parasitology Faculty of Veterinary ScienceBangladesh Agricultural UniversityMymensingh 2202Bangladesh Department of Fisheries Technology Faculty of FisheriesBangladesh Agricultural UniversityMymensingh 2202Bangladesh Department of Biotechnology School of Life Sciences&BiotechnologyAdamas UniversityBarasat-Barrackpore RdJagannathpurKolkataWest Bengal 700126India Department of Pathology and Parasitology Hajee Mohammad Danesh Science and Technology UniversityDinajpur 5200Bangladesh Department of Parasitology and Tropical Medicine Kitasato University School of Medicine1-15-1 KitasatoMinamiSagamiharaKanagawa 252-0374Japan Department of Molecular and Cellular Parasitology Kitasato University Graduate School of Medical Sciences1-15-1 KitasatoMinamiSagamiharaKanagawa 252-0373Japan

Background Opisthorchiid flukes,particularly Opisthorchis viverrini,Opisthorchis felineus,Clonorchis sinensis,and Metorchis *** the most common fish-borne zoonotic human liver flukes(hLFs).Liver fluke infections are more prevalent in resource-deprived and underprivileged *** herein estimated the prevalence of the metacercariae(MC)of major hLFs in common large freshwater fishes(lFWF)marketed for human consumption from some selected areas of Bangladesh along with detection of their molluscan vectors and *** The current status of fish-borne zoonotic hLF infections in lFWF was investigated along with their molluscan vectors and mammalian reservoir hosts in Mymensingh and Kishoreganj in Bangladesh from July 2018-June 2022 using conventional and multiple molecular techniques,such as PCR,PCR-restriction fragment length polymorphism(RFLP),sequencing,and bioinformatic *** infection rate of fishes was analyzed using the Z-test and the loads of MC were compared using the chi-squared(χ^(2))*** The MC of ***,Opisthorchis spp.,and Metorchis *** detected in 11 species of common and popular *** lFWF,the estimated prevalence was 18.7%and the mean load was 137.4±149.8 MC per 100 g of *** prevalence was the highest(P0.05)distributed between the head and body of *** infection rate was slightly higher in cultured(19.6%)*** MC of ***,***,***,and Metorchis orientalis in fishes were confirmed using PCR,PCR-RFLP and *** cercariae of opisthorchiid(Pleurolophocercus cercariae)flukes were only recovered from Bithynia spp.(3.9%,42 out of 1089).The ova of hLFs from dogs(4.3%,5 out of 116)and cats(6.0%,6 out of 100),and adult flukes(***)from ducks(41.1%113 out of 275)were *** The MC of

关键词： Human liver fluke Freshwater fish Molluscan vector Reservoir host Bangladesh

维普期刊数据库

Klippel Trenaunay Syndrome with Angiokeratoma Circumscriptum Naeviforme and Bilateral Congenital Anorchia: A Rare Association

在线全文

学校读者我要写书评

暂无评论

Open Journal of Pediatrics 2024年第1期14卷 43-49页

作者： Mujammel Haque Kalyan Benjamin Gomes Sajib Kumar Talukdhar Mustafizur Rahman Farzana sharmin Manik Kumar Talukder Department of Paediatrics Bangabandhu Sheikh Mujib Medical University Dhaka Bangladesh

Klippel-Trenaunay syndrome (KTS) is not a common congenital vascular abnormality. A trio of capillary malformation, venous varicosities, and bony or soft-tissue hypertrophy define this syndrome. Significant morbidities associated with this illness include bleeding, deep vein thrombosis, and embolic consequences. Angiokeratoma circumscriptum naeviforme (ACN) is indeed a congenital variant of angiokeratoma that appears as a hyperkeratotic plaque on the lower extremity. Bilateral congenital anorchia (BCA) is the total lack of testicular tissue in a male with a normal phenotype and karyotype. KTS has been linked to ACN. Here we presented an 8-year-old male child who came with a swollen left thigh and the right side of his face with overlying blackish nodules on his left thigh and scrotum. The patient was diagnosed as KTS with angiokeratoma circumscriptum naeviforme and bilateral congenital anorchia based on his history, imaging studies and the typical clinical features of the disease.

关键词： Klippel-Trenaunay Syndrome Angiokeratoma Circumscriptum Neviforme Bilateral Congenital Anorchia

一种用于低剂量CT的微小细节保护CNN与Transformer融合去噪方法

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国医学物理学杂志 2024年第7期41卷 842-850页

作者：李晓增王宝珠郭志涛 Shanaz sharmin Jui 河北工业大学电子信息工程学院天津300401 河北工业大学创新研究院(石家庄) 河北石家庄050299

为解决低剂量CT图像因辐射剂量降低而引入大量噪声,导致图像质量下降,从而影响临床诊断准确性问题,构建一种结合卷积神经网络(CNN)与Transformer的网络模型,并在此模型中引入一种内部块特征提取模块,以更好地保护图像中的微小细节。此外... 详细信息

为解决低剂量CT图像因辐射剂量降低而引入大量噪声,导致图像质量下降,从而影响临床诊断准确性问题,构建一种结合卷积神经网络(CNN)与Transformer的网络模型,并在此模型中引入一种内部块特征提取模块,以更好地保护图像中的微小细节。此外,为了解决应用Swin Transformer去噪时出现恢复错误纹理细节的问题,在自注意力部分并入一个多输入通道注意力模块,进而构建一种双重注意力Transformer。本研究在AAPM数据集上进行测试,实验结果表明,与现有的去噪算法相比,本文提出的算法在去噪方面表现出色,可以更好地保护图像的微小细节。

关键词：低剂量CT 图像去噪深度学习微小细节保护

维普期刊数据库博看期刊

Design and Implementation of Hand Gesture Detection System Using HM Model for Sign Language Recognition Development

在线全文

学校读者我要写书评

暂无评论

Journal of Data Analysis and Information Processing 2024年第2期12卷 139-150页

作者： sharmin Akter Milu Azmath Fathima Tanmay Talukder Inzamamul Islam Md. Ismail Siddiqi Emon Department of Computer Science & Telecommunication Engineering (CSTE) Noakhali Science & Technology University Noakhali Bangladesh School of Computer Mathematical & Natural Sciences (SCMNS) Morgan State University Baltimore MD USA Department of Physics Morgan State University Baltimore MD USA Department of ECE Morgan State University Baltimore MD USA Department of Computer Science Morgan State University Baltimore MD USA

Gesture detection is the primary and most significant step for sign language detection and sign language is the communication medium for people with speaking and hearing disabilities. This paper presents a novel method for dynamic hand gesture detection using Hidden Markov Models (HMMs) where we detect different English alphabet letters by tracing hand movements. The process involves skin color-based segmentation for hand isolation in video frames, followed by morphological operations to enhance image trajectories. Our system employs hand tracking and trajectory smoothing techniques, such as the Kalman filter, to monitor hand movements and refine gesture paths. Quantized sequences are then analyzed using the Baum-Welch Re-estimation Algorithm, an HMM-based approach. A maximum likelihood classifier is used to identify the most probable letter from the test sequences. Our method demonstrates significant improvements over traditional recognition techniques in real-time, automatic hand gesture recognition, particularly in its ability to distinguish complex gestures. The experimental results confirm the effectiveness of our approach in enhancing gesture-based sign language detection to alleviate the barrier between the deaf and hard-of-hearing community and general people.

关键词： Hand Gesture Recognition System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电控差速锁壳体热锻工艺方案设计与优化

精密成形工程 2024年

作者：王敏李旭辉陈天赋李航陈荣创张春 SHORNA sharmin Jahan 湖北汽车工业学院材料科学与工程学院储能与动力电池湖北省重点实验室汽车动力传动与电子控制湖北省重点实验室湖北隆中实验室湖北三环锻造有限公司

目的通过对电控差速锁壳体热锻工艺方案进行优化，解决其形状复杂而导致的填充不满、折叠等锻造缺陷问题。方法依据壳体的结构特征，设计了三种闭式热模锻工艺方案。建立了壳体热锻过程热力耦合有限元模型及模具应力分析数值模型。利... 详细信息

目的通过对电控差速锁壳体热锻工艺方案进行优化，解决其形状复杂而导致的填充不满、折叠等锻造缺陷问题。方法依据壳体的结构特征，设计了三种闭式热模锻工艺方案。建立了壳体热锻过程热力耦合有限元模型及模具应力分析数值模型。利用该模型对三种模锻工艺方案进行模拟，通过对模拟结果的对比分析，获得优化工艺方案。结果通过对三种工艺方案进行模拟分析，发现在镦粗方案和缩颈方案下金属能够完整填充终锻模具型腔，而小孔方案在终锻中出现了空穴-回填现象，可能导致折叠的产生，因此仅对镦粗方案和缩颈方案做进一步对比。通过两种方案在成形载荷、锻件温度/应变、模具应力以及坯料体积等方面的对比研究，发现与缩颈方案相比，镦粗方案的坯料体积略大，但锻件温度范围和分布更合理，制坯和终锻工序的锻件应变较小，制坯和预锻工序的最大模具应力更小。结论通过综合对比分析，确定镦粗方案为优化方案。采用壳体热锻实验，从锻件外形、微观组织和硬度等方面验证了该优化方案的有效性。

关键词：壳体闭式热模锻工艺方案优化有限元模拟

Effectiveness of Wastewater-Based Epidemiology as an Early Warning Tool to Detect SARS-CoV-2 (COVID-19)

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Health 2024年第7期16卷 635-656页

作者： Rakib Ahmed Chowdhury Daniel E. Meeroff Sumaiya sharmin Alamgir Kabir Sara Hollenbeck Valerie Dalencourt Thu Nguyen Zack Farmer Frederick Bloetscher Waseem Asghar Stacey Volnick College of Engineering and Computer Science Florida Atlantic University Boca Raton FL USA

Medical diagnostic tests to detect Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) for individuals in the United States were initially limited to people who were traveling or symptomatic to track disease incidence due to the cost of providing testing for all people in a community on a routine basis. As an alternative to randomly sampling large groups of people to track disease incidence at significant cost, wastewater-based epidemiology (WBE) is a well-established and cost-effective technique to passively measure the prevalence of disease in communities without requiring invasive testing. WBE can also be used as a forecasting tool since the virus is shed in individuals prior to developing symptoms that might otherwise prompt testing. This study applied the WBE approach to understand its effectiveness as a possible forecasting tool by monitoring the SARS-CoV-2 levels in raw wastewater sampled from sewer lift stations at a large public university campus setting including dormitories, academic buildings, and athletic facilities. The WBE analysis was conducted by sampling from building-specific lift stations and enumerating target viral copies using RT-qPCR analysis. The WBE results were compared with the 7-day rolling averages of confirmed infected individuals for the following week after the wastewater sample analysis. In most cases, changes in the WBE outcomes were followed by similar trends in the clinical data. The positive predictive value of the applied WBE approach was 86% for the following week of the sample collection. In contrast, positive correlations between the two data with Spearmen correlation (rs) ranged from 0.16 to 0.36. A stronger correlation (rs = 0.18 to 0.51) was observed when WBE results were compared with COVID-19 cases identified on the next day of the sampling events. The P value of 0.007 for Dorm A suggests high significance, while moderate significance was observed for the other dormitories (B, C, and D). The outcomes of this in

关键词： SARS-CoV-2 Wastewater Detection Wastewater-Based Epidemiology (WBE)

Impact of Temporal Population Distribution on Earthquake Loss Estimation:A Case Study on Sylhet,Bangladesh

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Disaster Risk Science 2014年第4期5卷 296-312页

作者： sharmin Ara Department of Urban and Regional Planning Chittagong University of Engineering and TechnologyChittagong 4349Bangladesh

To estimate human loss in an earthquake-prone area, it is necessary to analyze the role played by the spatiotemporal distribution of the area’s resident population. In order to evaluate earthquake impact, this article focuses on the spatiotemporal distribution of population and five scenario earthquakes that form the basis for loss estimation in the city of Sylhet, Bangladesh. Four temporal contexts(weekday, weekly holiday, the 30 days of Ramadan, and strike days) expand the more typical daytime and nighttime settings in which to examine hazard risk. The population distribution for every 2 hour interval in a day is developed for each type of day. A relationship between the occupancy classes and average space(persons per 100 m^2)is used to distribute people in each building regardless of building locations. A total daytime and nighttime population is obtained for each building and the estimated nighttime population is used to model the population for four temporal scenarios in a year based on different factors and weights. The resulting data are employed to estimate population loss for each of the temporal and earthquake scenarios. This study used building-specific human vulnerability curves developed by the Central American Probabilistic Risk Assessment(CAPRA) to obtain possible loss of life estimates. The results reveal that there is a high positive correlation between the spatiotemporal distribution of population and the potential number of casualties.

关键词： Bangladesh CAPRA Distribution modeling Earthquake loss estimation Spatiotemporal population distribution Temporal scenarios

维普期刊数据库