搜索到195975篇“ POTENTIAL“的相关文章
Mass Increase with Strong and Gravitational Potentials, and Mass Defect with Electromagnetic Potential
2024年
The proposal is “mass increases due to strong and gravitational potentials, while it decreases due to Electromagnetic potential”. This proposal explains the big difference in mass between hadrons (protons, neutrons, & mesons) and their components (quarks), mass difference between nucleus and its individual components (protons and neutrons), massless of gamma photons, abnormal masses of mesons and bosons, and the excess in galaxy masses (dark matter). Also, this proposal shows the exact relation between mass and energy: Strong Potential=−3.04mc2| Electric Potential |=−5.57×10−3mc2Gravitational Potential=−1.22×10−7mc2where m represents the excess in mass due to strong potential, or gravitational potential and represents the decrease in mass due to electromagnetic potential. Released energy here equals potential energy and doesn’t equal decrease in mass using the formula E = mc2. Released energy is transferred to heat, photons, kinetic energy… Finally, proposal will try to describe the relation between photon energy and mass of its components using the general equation of kinetic energy: Photon Energy=1/2mc2m is the sum of the individual masses of its components, while the total mass of photon is zero.
Hany Ali Hussein
关键词:PHOTONQUARKSBOSONS
Potential Benefits and Obstacles of the Use of Internet of Things in Saudi Universities: Empirical Study
2024年
Internet of Things (IoT) among of all the technology revolutions has been considered the next evolution of the internet. IoT has become a far more popular area in the computing world. IoT combined a huge number of things (devices) that can be connected through the internet. The purpose: this paper aims to explore the concept of the Internet of Things (IoT) generally and outline the main definitions of IoT. The paper also aims to examine and discuss the obstacles and potential benefits of IoT in Saudi universities. Methodology: the researchers reviewed the previous literature and focused on several databases to use the recent studies and research related to the IoT. Then, the researchers also used quantitative methodology to examine the factors affecting the obstacles and potential benefits of IoT. The data were collected by using a questionnaire distributed online among academic staff and a total of 150 participants completed the survey. Finding: the result of this study reveals there are twelve factors that affect the potential benefits of using IoT such as reducing human errors, increasing business income and worker’s productivity. It also shows the eighteen factors which affect obstacles the IoT use, for example sensors’ cost, data privacy, and data security. These factors have the most influence on using IoT in Saudi universities.
Najmah Adel FallatahFahad Mahmoud GhabbanOmair AmeerbakhshIbrahim AlfadliWael Ghazy AlheadarySalem Sulaiman AlatawiAshwaq Hasen Al-Shehri
关键词:UNIVERSITIES
电极电势计算器的设计开发与教学应用
2024年
电极电势是化学基础课教学中重要的物理量和基础数据,将现代信息化Python技术与电极电势教学深度融合,自主设计、开发了一款图形用户界面电极电势计算器。结合具体应用实例,以物料平衡和电荷平衡2个基本定量关系为基础,利用电对的电极还原反应和电极电势Nernst方程,首先介绍了计算器分别从标准电极电势和条件电极电势出发快速计算获取非标准状态下电极电势的2种途径,之后重点讨论了盐效应作用或酸效应、沉淀生成效应和配合物生成效应等副反应存在下电对条件电极电势的估算。电极电势计算器界面设计简洁,操作方便,具有较强的开放性、灵活性和普适性,无需安装和专业编程知识,可直接在Windows平台上运行,便于教师教学和学生自主探究学习。
李伟宁爱民吴璐璐岳阳王顺贾树恒李辉徐翠莲
关键词:PYTHON标准电极电势副反应
闽东葡萄气候生产潜力及利用率研究
2024年
【目的】探明区域气候变化对葡萄气候生产潜力的影响,为高效利用区域气候资源、优化葡萄产业布局提供依据。【方法】利用1971-2020年闽东9个国家基本气象站气象资料、2000-2019年闽东葡萄面积、产量资料,采用作物生长动态统计模型法、线性趋势分析法、Manner-Kendall检验法等分析闽东葡萄光合、光温、气候生产潜力及气候资源利用率的时空分布特征。【结果】近50年闽东葡萄光合、光温、气候生产潜力分别为59 313.2 kg/hm^(2)、 37 965.1 kg/hm^(2)、 36 868.0 kg/hm2,气候倾向率分别为-87.7 kg/(hm^(2)·10a)、869.1 kg/(hm^(2)·10a)、1 046.7 kg/(hm^(2)·10a)。气候潜力于1999年发生突变后呈加速上升趋势;在空间分布上,东部沿海气候潜力高,西北部山区低,高低值中心分别在福安市和周宁县。气温、降水对生产潜力的削减幅度分别为33%~40%、2%~4%,温度订正系数平均为0.6,降水订正系数平均为1.0,气候生产潜力与温度、降水、日照的相关系数分别为0.71、-0.31、0.70;闽东气候资源利用率平均为46%,与单产、气候生产潜力的相关系数分别为0.72、0.55。【结论】闽东葡萄气候生产潜力东部沿海优于西北部山区,气温是对闽东葡萄气候生产潜力影响最大的因子,降水增多带来负效应。葡萄种植结构格局与气候生产潜力空间分布匹配较好,通过提高葡萄单产水平、加强葡萄园区小气候调节等措施,闽东葡萄气候生产潜力的利用仍有较大提升空间。
陈小英林巧灵阮翠冰魏泽平
关键词:葡萄光合生产潜力光温生产潜力气候生产潜力气候资源利用率
Wind Potential Modeling at Kanfarandé Site in the Republic of Guinea
2024年
The purpose of this work is to assess wind potential on the Kanfarandé site (Guinea). The data used for this research covers a period of 6 years (2018 to 2023) and consists of in situ data (Boké meteorological station) and satellite products via NASA Power Larc. The study is based on sorted hourly data (speed and direction). The treatments focus on the monthly, annual and seasonal average of speeds, by sector and their frequencies as well as the annual available powers. The obtained results made it possible, on the one hand, to assess wind potential and, on the other hand, to highlight the most favorable periods for wind energy exploitation. The analyzes show the months of July and August have the best average wind speeds with 5.01 m/s and 5.34 m/s respectively. Average wind speeds are higher during the day than at night with a peak observed at 6 p.m. The study also shows that the prevailing winds are oriented towards the South-West. The Weibull parameters determined for the site give an average of 4.5 m/s for the scale parameter and for the shape parameter 2.40 corresponding to an average power density of 65 w/m2 with an annual available power of 194.80 W/m2 and an annual available energy of 1706.45 kWh/m2.
Nènè Aïssata BaldéOumar KeitaAmadou Lamarana BahTamba Nicolas Millimono
关键词:MODELINGGUINEA
改进A^(*)算法和人工势场法的路径规划被引量:7
2024年
A^(*)算法存在折线路径多和搜索节点多的问题,人工势场(artificial potential field,APF)法存在局部最优和不可到达的问题,针对两种算法存在的问题进行了研究。利用欧氏距离与投影距离提出一种新的混合式启发函数,依据该函数对A^(*)算法的流程进行改进,减少A^(*)算法的搜索节点,提高搜索效率。利用新A^(*)算法生成的最优节点作为APF算法的局部目标点,辅助机器人摆脱局部最优点;通过加入机器人和目标点的位置关系改进势场函数,修改斥力的增益,优化斥力的生成方向。在改进的基础上将两种算法融合提出一种新的算法,利用APF法的势场函数引导A^(*)算法的搜索。从路径长度、避障效果、迭代次数对改进算法进行对比分析,仿真结果表明,提出的改进算法搜索效率高,实现避障的同时保证计算的路径最优。
余翔姜陈段思睿邓千锐
关键词:路径规划
A Comprehensive Review of Exosomes with Therapeutic Potential in Cancer and Coeliac Disease
2024年
The aim of this review was to evaluate the therapeutic potential of exosomes, extracellular vesicles secreted by cells. They have emerged as potential therapeutic transporters for several diseases. This review provides an overview of exosomes’ therapeutic potential in cancer therapy and autoimmune conditions such as Coeliac Disease. The therapeutic effect is that the phospholipid-binding protein ANXA1 improves its anti-inflammatory properties. The review also analyzes the intricate processes of exosome production and composition ability to transport biomolecules such as proteins, microRNAs, and lipids, which promote intercellular communication and alter recipient cell behavior. Exosomes, linked to neurological disorders, cardiovascular disease, and cancer, present the means of targeted drug administration due to their innate specificity. Through genetic engineering and chemical modifications, exosomes can be tailored for specific purposes, demonstrating their versatility in targeted therapy. With ongoing research uncovering their therapeutic potential, exosomes present a promising frontier in novel medical treatments across various health conditions.
Fathima AssainarJoshua George ThomasZoya SaleemShafa ThekkekaraFathima MammooNavadir Nidal Kallan
关键词:EXOSOMESCANCERANTI-INFLAMMATION
位涡源汇和位涡环流及其天气气候意义
2024年
在扼要回顾地表位涡研究进展的基础上,本文介绍了复杂地形下的位涡及位涡制造的计算及近年来关于位涡源汇和位涡环流(PVC)的研究进展,侧重介绍青藏高原表层位涡的特殊性及其对天气气候的重要影响。阐明对于绝热和无摩擦大气运动,由于位涡本身的结构重组(位涡重构)可以引起垂直涡度的发展,在夏季可以激发高原涡形成,冬季使青藏高原东部成为重要的表面涡源。基于导得的包括非绝热加热作用的、与等熵面的位移相联系的垂直运动(ωID)方程,进一步阐明青藏高原制造的正位涡沿西风气流东传会引起下游地区低空气旋性涡度、偏南风、和上升运动发展,导致位涡平流随高度增加,激发极端天气气候事件发生发展。指出青藏高原地表加热和云底的潜热释放的日变化显著地影响着地表层位涡的日变化,导致青藏高原的低涡降水系统多在午后至夜间发生发展。证明与传统的青藏高原感热加热指数相比,青藏高原地表层位涡指数能够更好地刻画关于降水的季节变化,与亚洲夏季风降水相关更密切。本文还简单介绍了PVC的概念。指出由于区域边界面的PVC的辐散辐合的变化直接与区域位涡的变化相关联,为保持北半球位涡总量的相对稳定,跨赤道面上的PVC变化与地表PVC的变化必须相互补充,因此跨赤道面上的位涡环流的变化可以成为监测近地表气候变化的窗口。近赤道的海气相互作用能够直接造成沿赤道垂直面上的纬向风垂直切变的变化,激发跨赤道位涡环流异常,从而通过大气内部PVC的变化和青藏高原的调控影响北半球近地表的气候变化。结果表明位涡环流分析为建立热带和热带外大气环流变化的联系开辟了新的蹊径,有着广阔的应用前景。
吴国雄刘屹岷刘屹岷何编毛江玉何编生宸包庆李言蹊
关键词:青藏高原极端天气事件
In-Depth Study of Potential-Based Routing and New Exploration of Its Scheduling Integration
2024年
Industrial wireless mesh networks(WMNs)have been widely deployed in various industrial sectors,providing services such as manufacturing process monitoring,equipment control,and sensor data collection.A notable characteristic of industrial WMNs is their distinct traffic pattern,where the majority of traffic flows originate from mesh nodes and are directed towards mesh gateways.In this context,this paper adopts and revisits a routing algorithm known as ALFA(autonomous load-balancing field-based anycast routing),tailored specifically for anycast(one-to-one-of-many)networking in WMNs,where traffic flows can be served through any one of multiple gateways.In essence,the scheme is a hybrid-type routing strategy that leverages the advantages of both back-pressure routing and geographic routing.Notably,its novelty lies in being developed by drawing inspiration from another field,specifically from the movement of charges in an electrostatic potential field.Expanding on the previous work,this paper explores further in-depth discussions that were not previously described,including a detailed description of the analogy between an electrostatic system and a WMN system based on precise mapping perspectives derived from intensive analysis,as well as discussions on anycast,numerical methods employed in devising the ALFA scheme,its characteristics,and complexity.It is worth noting that this paper addresses these previously unexplored aspects,representing significant contributions compared to previous works.As a completely new exploration,a new scheduling strategy is proposed that is compatible with the routing approach by utilizing the potential-based metric not only in routing but also in scheduling.This assigns higher medium access priority to links with a larger potential difference.Extensive simulation results demonstrate the superior performance of the proposed potential-based joint routing and scheduling scheme across various aspects within industrial WMN scenarios.
Jihoon SungYeunwoong Kyung
排水采油与气水协同复合挖潜在某井组应用
2024年
塔河碳酸盐岩是经过多期构造破裂和古风化壳岩溶共同作用的缝洞型油气藏,储集空间主要有溶洞、裂缝及孔隙三种类型,其特点是不规则形态和非均匀分布,储层非均质性极强,油水关系复杂。文章从排水采油原理出发结合H20井组地质背景、生产特征、连通情况入手对井组连通情况、见水特征进行分析,根据井组水侵规律认识,制定排水采油复合气水协同组合治理对策,实现井组复合挖潜,效益开发。
杜康潘政林
关键词:塔河油田排水采油

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