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校园建筑光伏并网系统优化设计与运行特性研究

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校园建筑光伏并网系统优化设计与运行特性研究

作者： Sethar,sartaj ali 大连理工大学

学位级别：硕士

众所周知,随着经济的发展,建筑能耗逐年增长。为此,许多研究者采用可再生能源解决建筑能耗问题。巴基斯坦能源短缺问题更为严重,仅靠电网无法满足校园持续供电需求,特别在夏季,经常导致校园每天停电2个小时,当校园电网断电时,需要依赖... 详细信息

众所周知,随着经济的发展,建筑能耗逐年增长。为此,许多研究者采用可再生能源解决建筑能耗问题。巴基斯坦能源短缺问题更为严重,仅靠电网无法满足校园持续供电需求,特别在夏季,经常导致校园每天停电2个小时,当校园电网断电时,需要依赖燃油发电机组。为解决校园建筑的用电需求,本论文提出并设计了500kW的光伏并网发电系统,通过模拟分析了光伏并网系统的年运行特性,本文的研究结果对促进屋顶光伏系统在巴基斯坦校园的推广应用具有重要作用。首先,结合巴基斯坦地区的气候特征,分析了空调负荷不需考虑新风负荷的影响,通过TRNSYS软件建立了建筑冷负荷计算模型,在不考虑通风的条件下,研究了屋顶光伏组件对建筑冷负荷的影响,结果表明屋顶光伏组件能减少10.62%的建筑冷负荷。其次,结合巴基斯坦照明标准和建筑实际情况,对夏季照明、插座、空调和冬季供热负荷进行分析,确定校园建筑总电负荷和各类电负荷。10栋建筑用电总负荷700kW,其中照明及插电负荷450kW,空调负荷250kW.第三,根据校园用电负荷需求及冬夏用电负荷特点,设计了500kW屋顶光伏系统,确定了系统光伏组件、蓄电池、逆变器等设备的容量,基于HOMER软件,分析了光伏并网系统的年运行特性,最后从能源成本、系统成本和投资回收期三个方面分析了光伏系统建设的可行性。

关键词：校园建筑光伏并网系统优化设计运行特性经济性分析

Pre-harvest Fruit Losses and Physico-Chemical Analysis of Different Varieties of Pomegranate in Gilgit-Baltistan Pakistan

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Journal of Agricultural Science and Technology(B) 2012年第9期2卷 997-1004页

作者： Azhar Hussain Muhammad Saeed Awan sartaj ali Hussain Azhar Department of Agriculture and Food Technology Karakoram International University Gilgit Pakistan

The incidence of pre-harvest fruit losses of four pomegranate varieties were surveyed in fifteen villages of three valleys in Gilgit-Baltistan Pakistan during 2010-2011. These varieties were also used to analyze their chemical, physical and physiological properties. The results of the study revealed that mean pre-harvest loss in Jalalabad valley ranged from 11.65% -13.41%, 9.73%-28.87% in Bagrote and 13.81%-25.59% in Haramosh valley. Data obtained for chemical properties of these varieties showed variation in TSS from 11.14-14.3 （~Brix）, acidity 0.39%-0.88%, and maturity index 12.72-36.5, reducing sugar 7.27-12.5 g/100 mL, seed oil 13.1%-14.34% and pH 2.46-3.04. Physical properties in terms of pulp, juice, peel ash, seed ash, seed moisture and peel moisture contents were found as 52.5%-53.7%, 33.16%-36.5%, 0.68%-0.70%, 0.57%-0.67%, 75.83%-79.92% and 70.8%-75.0% among the four varieties. Physiological properties viz., fruit length, fruit diameter, number of seed/fruit, fruit weight, 100 seed weight and seed/fruit weight were also recorded during this study. The overall results of the present study showed higher pre-harvest losses in Haramosh and Bagrote valleys that need to be addressed through improved crop management practices for economic benefits of the farming communities.

关键词： Pomegranate varieties cracking spoilage physico-chemical Gilgit-Baltistan Pakistan.

超声心动图检测中老年尿毒症患者肾移植术前后左室结构和功能的变化

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中国实验诊断学 2009年第8期13卷 1044-1046页

作者：陈丽萍谭岩 sartaj ali Sana Zafar 黄树军吉林大学第一医院心血管中心吉林长春130021 吉林大学第一医院中心实验室博士后流动站吉林长春130021 吉林大学白求恩医学院留学生吉林长春130021 中国石油天然气股份有限公司吉林油田分公司新立采油厂工艺所吉林松原138000

目的研究中老年尿毒症患者肾移植前、后左室结构和功能的改变。方法经胸彩色多普勒超声心动图测量20例中老年尿毒症患者肾移植前、肾成功移植三个月以后的左室结构及功能。结果中老年尿毒症患者移植前后心脏各参数左室舒末径、左室壁厚... 详细信息

目的研究中老年尿毒症患者肾移植前、后左室结构和功能的改变。方法经胸彩色多普勒超声心动图测量20例中老年尿毒症患者肾移植前、肾成功移植三个月以后的左室结构及功能。结果中老年尿毒症患者移植前后心脏各参数左室舒末径、左室壁厚度、左室收缩及舒张功能均有明显改善(P0.05)。结论中老年尿毒症患者在成功进行肾移植术后,左室的结构及功能均得以改善。

关键词：肾移植术超声心动图左心结构心功能

中老年尿毒症患者肾移植术前后左室结构和功能的对比分析

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中国老年学杂志 2009年第18期29卷 2302-2304页

作者：陈丽萍朱亚香 Sahil Mansotra Akshay Udaya Kumar Shetty Sara Hason sartaj ali 谭岩吉林大学第一医院心血管中心吉林长春130021 吉林大学第一医院中心实验室博士后流动站吉林大学第一医院泌尿二外暨移植中心吉林大学白求恩医学部

目的分析20例中老年尿毒症患者肾移植前、后左室结构和功能的改变。方法二维、M型及多普勒超声心动图测量20例正常人、20例中老年尿毒症患者肾移植前、肾成功移植后1个月及三个月以后的左室结构及功能。结果病例组肾移植后一个月扩张的... 详细信息

目的分析20例中老年尿毒症患者肾移植前、后左室结构和功能的改变。方法二维、M型及多普勒超声心动图测量20例正常人、20例中老年尿毒症患者肾移植前、肾成功移植后1个月及三个月以后的左室结构及功能。结果病例组肾移植后一个月扩张的左房内径、左室舒末径均较术前减小,增厚的左室壁厚度开始变薄,三个月后增厚的左室壁厚度、收缩功能及舒张功能较移植术前明显改善(P<0.01),左房内径及左室壁厚度仍高于对照组(P<0.05),左室舒末径与正常无差异。结论中老年尿毒症患者在成功进行肾移植术后,左室的结构及功能逐渐得以改善,术后3个月变化明显。

关键词：肾移植左室结构左心功能

Genuine entanglement under squeezed generalized amplitude damping channels with memory

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Chinese Physics B 2024年第2期33卷 158-163页

作者： Mazhar ali Department of Electrical Engineering Faculty of EngineeringIslamic University MadinahMadinah 107Saudi Arabia

We study genuine entanglement among three qubits undergoing a noisy process that includes dissipation, squeezing,and decoherence. We obtain a general solution and analyze the asymptotic quantum states. We find that most of these asymptotic states can be genuinely entangled depending upon the parameters of the channel, memory parameter, and the parameters of the initial states. We study Greenberger–Horne–Zeilinger(GHZ) states and W states, mixed with white noise,and determine the conditions for them to be genuinely entangled at infinity. We find that for these mixtures, it is possible to start with a bi-separable state(with a specific mixture of white noise) and end with genuine entangled states. However, the memory parameter μ must be very high. We find that in contrast to the two-qubit case, none of the three-qubit asymptotic states for n → ∞ are genuinely entangled.

关键词： genuine entanglement squeezed thermal baths multipartite states

Heat transfer analysis in particle-laden flows using the immersed boundary method

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Particuology 2024年第7期90卷 394-403页

作者： ali Abbas Zaidi Department of Mechanical Engineering University of Manitoba75A Chancellors CircleWinnipegR3T 5V6Canada

This paper investigates an efficient immersed boundary method(IBM)for multiple-core CPU machines with local grid refinement for the calculation of heat transfer between fluids and finite-sized *** fluid momentum equations are solved by using the fractional step method,while the energy equation is solved by employing the second-order Adams-Bashforth *** efficient load balancing between the CPU cores,the coupling between particles and fluid is obtained by applying the body force in the fluid equations,which depends on the solid volume fraction of particles contained in each grid cell,and then by linearly interpolating the particle temperature and velocity on the fluid grid cell(in place of the delta function commonly used in literature).Several test cases from the literature are studied,and good agreement is observed between the simulation results and the ***,a scaling study on multiple core machines is performed,demonstrating the proposed IBM's capabilities for a significant reduction in processing time.

关键词： Heat transfer Immersed boundary method Particle resolved direct numerical simulations Fluid solid interactions

Simulation of the deformable lateral boundaries in biaxial test using DEM

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Particuology 2024年第5期88卷 161-175页

作者： ali Momeni Barry Clarke Yong Sheng ali Hassanpour WSP 3 Wellington PlaceLeedsLS1 4APUK Hull University HullHU6 7RXUK School of Civil Engineering University of LeedsLeedsLS2 9JTUK School of Computer Science University of HullHullHU6 7RXUK School of Chemical and Process Engineering University of LeedsLeedsLS2 9JTUK

Applying the discrete element method(DEM)in soil mechanics can provide abundant information at the particle-scale and facilitates illustration of the macro-mechanical behaviour of soils based on the inter-particle *** triaxial test is one of the most common laboratory methods to study the macro-mechanical behaviour of particulate materials such as ***,many problems in geotechnical design can be assumed and simplified as a plane strain *** a biaxial test can be conducted to reproduce the macro-mechanical behaviour of soil,where the sample is enclosed by two horizontal rigid platens and a vertical latex membrane,which is a deformable continuous element and allows the enclosed specimen to deform freely while maintaining confining stress during *** paper presents an algorithm to represent physical and mechanical characteristics of latex membrane in the 2D DEM simulation of biaxial test using the PFC^(2D) *** investigate the impact of the lateral boundary conditions on the micro-macro mechanical behaviours of soil samples,two sets of DEM biaxial tests are conducted,*** rigid and deformable lateral boundary *** DEM modeling results indicate that the lateral boundary conditions have a significant effect on the micro-scale fabric properties,thickness and inclination of the shear *** comparison between these two simulations also demonstrates that the lateral boundary conditions play a major role in the peak and post-peak stress-strain behaviours as well as the dilation and critical state behaviours of granular soils.

关键词： Discrete element method Biaxial test Deformable boundaries Shear band Critical state Fabric anisotropy Geometrical stability index

Sensing the heavy water concentration in an H_(2)O-D_(2)O mixture by solid-solid phononic crystals

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Chinese Physics B 2024年第4期33卷 493-498页

作者： Mohammadreza Rahimi ali Bahrami Optoelectronic and Nanophotonics Research Laboratory(ONRL) Faculty of Electrical EngineeringSahand University of TechnologyTabrizIran

A new method based on phononic crystals is presented to detect the concentration of heavy water(D_(2)O)in an H_(2)O-D_(2)O *** have been obtained and analyzed in the concentration range of 0%-10%and 90%-100%D_(2)O.A proposed structure of tungsten scatterers in an aluminum host is *** order to detect the target material,a cavity region is considered as a sound wave resonator in which the target material with different concentrations of D_(2)O is *** changing the concentration of D_(2)O in the H_(2)O-D_(2)O mixture,the resonance frequency undergoes a frequency *** 1%change in D_(2)O concentration in the H_(2)O-D_(2)O mixture causes a frequency change of about 120 *** finite element method is used as the numerical method to calculate and analyze the natural frequencies and transmission spectra of the proposed *** performance evaluation index shows a high Q factor up to 1475758 and a high sensitivity up to 13075,which are acceptable values for sensing *** other figures of merit related to the detection performance also indicate high-quality performance of the designed sensor.

关键词： phononic crystals sensor H_(2)O-D_(2)O mixture cavity

Note on Lower Triassic Gondolelloid Conodont Rediversifications with Emphasis on the Spathian Recovery

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Journal of Earth Science 2024年第4期35卷 1236-1242页

作者： ali Murat Kilic Department of Geological Engineering Faculty of EngineeringBalikesir UniversityBalikesir99100Turkey

Conodonts,as a biotic group,next to ammonoids,pollen and spores,crustaceans and vertebrates,provide proxy clues for environment and age assessments of the rocks in which they *** are widely used for Triassic marine ***,there are various discussions about their multielement taxonomy and evolutionary lineages(e.g.,generation,speciation).Although first studies reported that most Triassic conodont species were unimembrate,studies carried out in the following years maintained that all Triassic conodonts were *** statistical reconstructions of a number of Triassic apparatuses were attempted,the discovery of fused clusters and natural assemblages has subsequently demonstrated that Triassic conodonts are indeed multimembrate,and all of the elements exist together in the same *** present paper aims to clarify the evolutionary relationship and array of some Lower Triassic *** dagisi *** described.

关键词： Triassic Spathian conodont Columbitella Siberia environmental geology