基于区块链的新型存储模型慈善系统

来源 :计算机系统应用 | 被引量 : 0次 | 上传用户:wenzhiqiang963
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
现如今的慈善领域总会面临着数据无法公开透明的问题,人们无法对不公开数据的慈善组织报以信任,即使公开了数据,也要面临着数据造假的质疑.针对现有慈善组织存在的公信力不足、便捷性低,以及善款流向不透明等问题,本系统采用区块链技术,通过设计新型数据存储模型,将上传的项目数据按照所需的要求进行加解密等操作,使得数据具有保密性;同时将交易数据进行链上存储,利用区块链不可篡改可追溯等特性,将所有经过本系统的交易数据进行上链操作,使得交易数据变得公开透明,同时无法对已经完成的交易的数据进行修改,从而使整个系统具有足够的公信力,有效地弥补了传统慈善系统的数据不公开,同时可能存在数据造假的不足.
其他文献
Infection-associated hemophagocytic syndrome(IAHS),a severe complication of various infections,is potentially fatal.This study aims to determine whether IAHS occurs in critically ill patients with coronavirus disease 2019(COVID-19).We conducted a retrospe
Coronavirus disease 2019(COVID-19)occurs in the influenza season and has become a global pandemic.The present study aimed to examine severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)co-infection with influenza A virus(IAV)in an attempt to provid
自然语言处理中的文档分类任务需要模型从低层级词向量中抽取高层级特征.通常,深度神经网络的特征抽取会利用文档中所有词语,这种做法不能很好适应内容较长的文档.此外,训练深度神经网络需要大量标记数据,在弱监督情况下往往不能取得良好效果.为迎接这些挑战,本研究提出应对弱监督长文档分类的方法.一方面,利用少量种子信息生成伪文档以增强训练数据,应对缺乏标记数据造成的精度难以提升的局面.另一方面,使用循环局部注意力学习,仅基于若干文档片段抽取出摘要特征,就足以支撑后续类别预测,提高模型的速度和精度.实验表明,本研究提出
本文介绍了基于RISC-V的嵌入式智能小车控制系统的硬件连接方案、基于状态机的智能小车状态分析方法和不同应用场景下的电机控制方案.系统以运行RISC-V软核的FPGA开发板作为智能小车的主控板,通过RISC-V的GPIO模块采集智能小车的超声波传感器和红外传感器信号来分别检测小车前方和后方的障碍物,利用GPIO中断对碰撞检测传感器和倾斜角传感器信号作出快速响应,利用PWM模块实现不同场景下的电机控制.测试结果表明,本文介绍的控制系统能够实现智能小车的自主避障、碰撞检测和姿态检测等功能.
The corona virus disease 2019(COVID-19)is an emerging respiratory infectious disease caused by SARS-CoV-2,which first occurred in December 2019 in Wuhan,China.These days,in China,chest CT is used for diagnosis of COVID-19,as an important complement to the
The COVID-19 pandemic caused by SARS-CoV2 is characterized by a remarkable variation in clinical severity ranging from a mild illness to a fatal multi-organ disease.Understanding the dysregulated human immune responses in the fatal subjects is critical fo
The outbreak of coronavirus disease 2019(COVID-19)posed an unprecedented threat to health care providers(HCPs)in Wuhan,China,especially for nurses who were frequently exposed to infected or suspected patients.Limited information was available about the wo
The novel coronavirus SARS-CoV-2 caused an outbreak of pneumonia in Wuhan,Hubei province of China in January 2020.This study aims to investigate the effects of different temperature and time durations of virus inactivation on the results of PCR testing fo
Alzheimer\'s disease(AD)is an age-related neurodegenerative disease with two major hallmarks:extracellular amyloid plaques made of amyloid-β(Aβ)and intracellular neurofibrillary tangles(NFTs)of abnormally hyperphosphorylated tau.The number of NFTs corre
Currently,little in-depth evidence is known about the application of extracorporeal membrane oxygenation(ECMO)therapy in coronavirus disease 2019(COVID-19)patients.This retrospective multicenter cohort study included patients with COVID-19 at 7 designated