基于自由曲面和L-system的红掌生长模型

针对红掌花卉生长可视化中参数难以确定的问题进行研究,提出推导控制点的方法,建立红掌器官模型:采用Bezier曲线结合扫描成型的方法来构造叶柄模型,采用双三次NURBS曲线对佛焰苞进行建模;运用红掌的相关表型数据拟合生长函数,提出基于红掌生长规律的微分L-system,可有效模拟红掌的拓扑结构和生长过程;通过虚拟器官表示红掌器官的几何属性,降低微分L-system的复杂度。试验验证提出的方法对红掌各项生长指标拟合度可达0.89以上,并可对每个生长阶段的红掌进行模拟,能有效地对红掌的生长过程进行建模。

基于L-system算法的植物信息模型构建和三维绿量分析

【目的】当前广泛使用的三角面网格模型并不能全面表达植物模型特征,探索行业内植物信息模型构建与三维绿量计算新方法具有重要意义。【方法】在梳理L-system植物生成算法发展背景和研究进展的基础上,基于华中农业大学襄阳现代农业研究院本科宿舍区的规划情景,使用L-system算法,基于24种植物的分枝结构和形态特征,生成参数化的L-system植被模型。【结果】构建出研究区域建成初期绿地规划模型与植物成熟期绿地规划模型,并提出了4项三维绿量的评估指标定义和计算方法,对场地建成初期和植物成熟期的绿量特征进行了对比分析。结果表明,场地建成初期三维绿量为13497.08 m^(3),单位面积三维绿量为12.25 m^(3)/m^(2);植物成熟期三维绿量可达215097.42 m^(3),单位面积三维绿量达到195.00 m^(3)/m^(2)。【结论】在规划设计领域,基于L-system算法的植物模型建模,可实现模型构建的参数化和便捷化,并适用于不同的细节层级,在规划设计算法模型标准制定、植物数字孪生模型构建和生态效能评估方面具备着广泛的应用前景。

Blockchain-Based Light-Weighted Provable Data Possession for Low Performance Devices

Provable Data Possession(PDP)schemes have long been proposed to solve problem of how to check the integrity of data stored in cloud service without downloading.However,with the emerging of network consisting of low performance devices such as Internet of Things,we find that there are still two obstacles for applying PDP schemes.The first one is the heavy computation overhead in generating tags for data blocks,which is essential for setting up any PDP scheme.The other one is how to resist collusion attacks from third party auditors with any possible entities participating the auditing.In this paper,we propose a novel blockchain-based light-weighted PDP scheme for low performance devices,with an instance deployed on a cloud server.We design a secure outsourced tag generating method for low performance devices,which enables a kind of“hash-sign-switch”two-phase tag computing.With this method,users with low performance devices can employ third party auditors to compute modular exponential operations that accounts for the largest portion of computation overhead in tag generation,without leaking their data content.Chaincodes in blockchain network ensure the correctness of such outsourcing and prevent collusion attacks.The security analysis and performance evaluation prove that our scheme is both secure and efficient.

On the Reason of Changes of Chinese Possession Institution——from the Perspective of Historical Institutionalism

It is the important part of historical institutionalism to explore the reason of the changes of institutions,which includes key issues of historical institutionalism—why do institutions change?How do institutions play a new role through changing?As far as the reason of the changes is concerned,there are social reasons,economic reasons,technological reasons as well as concept reasons.Being part of the China’s civil law system,the possession institution unexceptionally experiences changing process of establishment,amendment,reform and innovation.This paper attempts to analyze the reason of the changes of the possession institution from the perspective of institutional change theory of the historical institutionalism,giving historical explanation of institutional changes and putting forward historical interpretation and support for the perfection of the contemporary possession institution.

The Enclosed Personal Space and Female Identity Construction in A. S. Byatt's Possession

From the perspective of feminism, by analyzing single intellectual women's living states in enclosed personal spaces, andcomparing their different spatial changes triggered by external intrusions, this essay intends to explore Byatt's ambivalent attitudestowards the feminists' pursuit for a room of one's own, and point out the significance of harmonious co-existence between men andwomen to female identity construction.

Paradise Archetype in Possession

A.S.Byatt's Possession has its own appraisal of public and critic alike for its original structure, as well as for the novelty and complexity of its themes. With Northrop Frye's archetypal criticism, this paper analyzes the epic poems"The Garden of Proserpina"so as to identify the hidden creation theme from paradise archetype.

The Quest Motif in Possession

The author of the paper analyzes the story"Glass Coffin"in A. S. Byatt's Possession and compares it with Brothers Grimm's fairy tale with the same name. Through the study, the author identifies the quest motif from our modern hero's discovery journey in Possession.

A Novel Provable Data Possession Scheme Based on Geographic Location Attribute

Increment of mobile cloud video motivates mobile users to utilize cloud storage service to address their demands,cloud storage provider always furnish a location-independent platform for managing user's data.However,mobile users wonder if their cloud video data leakage or dynamic migration to illegal service providers.In this paper,we design a novel provable data possession protocol based on data geographic location attribute,which allows data owner to auditing the integrity of their video data,which put forward an ideal choice for remote data possession checking in the mobile cloud storage.In our proposed scheme,we check out whether the video data dynamic migrate to an unspecified location(such as:overseas) by adding data geographic location attribute tag into provable data possession protocol.Moreover,we make sure the security of our proposed scheme under the Computational Diffie-Hellman assumption.The analysis and experiment results demonstrate that our proposed scheme is provably secure and efficient.

论刑法修正案(八)第四十七条之再完善

刑法修正案(八)第四十七条所指的罪名需进一步分解,其罪状表述需进一步规范。非法占有型采矿罪的刑罚设置需更好地适应抢劫矿产罪、抢夺矿产罪、盗采矿产罪之社会危害性。刑法修正案(八)第四十七条所指的罪名可分解为抢劫矿产罪、抢夺矿产罪、盗采矿产罪,进一步规范刑法修正案(八)第四十七条的罪状表述,准确把握抢劫矿产罪、抢夺矿产罪、盗采矿产罪的犯罪构成。在犯罪客观方面,正确理解情节严重的内涵。为了更好地与抢劫矿产罪、抢夺矿产罪、盗采矿产罪之社会危害性相适应,进一步调整刑法修正案(八)第四十七条设定的刑罚。

用L-systems和遗传算法实现的叶子形状建模

阐述了组合两类技术的一种方法:用L-systems和遗传算法(GA)获取一种改写表达式描述叶子形状。一个L-systems用于构造给定改写表达式,而GA是用于改写表达式的适应参数。介绍了用目标函数实现实值参数替换方法,研究结果表明提出的方法产生可以接受的输 出效果。

基于L-System模型的Web三维果园构建方法研究

网络技术和虚拟现实技术的发展为农作物生境的展示提供了多样化的方式。笔者研究在L-System植物模型的基础上,提出一种简单、快速的在线三维果园构建技术方案:采用Xfrog软件构建果树三维模型,运用Unity3D引擎设计果园三维场景并实现人工交互,以热带水果——莲雾作为应用范例,构建Web三维莲雾园模型,模型具有真实感强、交互功能丰富、操作简单等特点。该方案为果树生长研究、农业景观规划和乡村旅游推广等应用提供三维可视化的展示方式。

论财产犯罪中股权的占有及转移

股权属于财产性利益,股权并不是抽象的公司财产,股权的财产属性体现为股东的盈余分配权及股权转让权。财产性利益的占有方式体现为对权力的实际行使和支配,股权的占有方式体现为实际行使具有财产属性的股东权利,股东凭借股东名册的记载和登记机关登记行使股东权利并排他性地实现股权的占有。变更股东工商登记的行为是股权的转移占有行为,但只有在公司内部完全排除股东行使股东权利才是股权占有转移的完成。

分割数据产权的不适性——转向基于模块理论的数据持有权

在数据经济时代,释放数据价值的方式是利益相关者为共同目标而协作使用数据,并非分割数据的使用。因此,不可将数据二十条中涉数据产权内容理解为三权分置,这既不符合财产法原理也不符合数据价值创造和实现方式。就制度设计而言,应以模块原理构建数据产权制度。模块原理是标准化思维的产物,是一种利益相关者协同治理的产权形态,可为各利益相关者和整个数据生态系统创造价值,此为分割产权所不能及。数据持有权是模块结构的应用产物,因其制度设计旨在激励利益相关者治理数据从而生产出可交易数据,与数据价值创造和实现方式相契合。其中,可交易数据的流通是连接整个模块的核心,数据持有权利规范是整个模块治理的核心。

基于L-System的海南黎锦图案元素生成技术研究

通过对黎锦图案特佂的分析,以Matlab为技术平台,运用图形的分形理论,结合L-System模拟生成黎锦图案元素。实验结果表明,生成图案元素效果较好。希望该研究能为黎锦图案的研究提供帮助,也为黎锦文化的传承作出贡献,让黎族织锦盛名远扬。

Sec-Auditor:A Blockchain-Based Data Auditing Solution for Ensuring Integrity and Semantic Correctness

Currently,there is a growing trend among users to store their data in the cloud.However,the cloud is vulnerable to persistent data corruption risks arising from equipment failures and hacker attacks.Additionally,when users perform file operations,the semantic integrity of the data can be compromised.Ensuring both data integrity and semantic correctness has become a critical issue that requires attention.We introduce a pioneering solution called Sec-Auditor,the first of its kind with the ability to verify data integrity and semantic correctness simultaneously,while maintaining a constant communication cost independent of the audited data volume.Sec-Auditor also supports public auditing,enabling anyone with access to public information to conduct data audits.This feature makes Sec-Auditor highly adaptable to open data environments,such as the cloud.In Sec-Auditor,users are assigned specific rules that are utilized to verify the accuracy of data semantic.Furthermore,users are given the flexibility to update their own rules as needed.We conduct in-depth analyses of the correctness and security of Sec-Auditor.We also compare several important security attributes with existing schemes,demonstrating the superior properties of Sec-Auditor.Evaluation results demonstrate that even for time-consuming file upload operations,our solution is more efficient than the comparison one.

财产犯罪中规范性占有的认定——以物流体系中承运人私取货物为例

占有是财产犯罪中的重要概念,既影响定性,也影响量刑。目前,占有的判断标准存在较大争议,远未形成共识,由此导致案件处理陷入困境。解决问题的关键在于厘清占有的判断要素和具体思考路径。事实性要素的基础地位应当坚守,同时,规范占有说的核心思想也应当提倡。具体来讲,先考察事实性要素,结合规范性要素,而后再考察主观精神要素,通过阶层判断的递进式结构判断占有归属。阶层式判断标准的提倡,有助于明确占有判断标准,具现思考路径,从而在个案判断中起到刑法理论应有的指导作用。

中国农村土地要素占有权配置实现研究

农地要素占有权的有效配置实现,其关键是不断探索农地占有关系及其产权分置“内容”与实现“形式”。通过探秘农地产权占有行为构成与农地要素配置运行之间的政治经济学逻辑关联,回溯中国农地占有权制度的得失安排及其要素配置方式的历史演进,本文剖析并提出了农地要素占有权的排他性界定、社会化配置、市场化交易和物权化保护的现实困境与破解之道,进而为实现要素市场化高效配置、赋予农民更加充分的财产权益和推进中国式农业农村现代化发展提供农地占有权制度改革策略。

透过“‘占有’概念语义丛”看“占有”的遮蔽与澄明——基于MEGA^(2)《1844年经济学哲学手稿》的研究

在MEGA^(2)《1844年经济学哲学手稿》中,“Haben”“Besitz”“Eigentum”“bemachtigen”“Aneignung”等共同构成了一个错综相连的“‘占有’概念语义丛”,通过对其进行细致的语义分析,“占有”概念逐渐从遮蔽走向澄明。“占有”的遮蔽具体体现为两条线索:一是占有的私人化,二是占有的名词化。“Eigentum”标志着“占有”抵达遮蔽至深处,此时占有表现为抽象的所有权,由此招致从“物的异化”到“人的异化”的全面异化。“Aneignung”作为对“Eigentum”的扬弃,则标志着“占有”的澄明,它具体表现为“社会共同占有对象”与“人全面占有自身”两个方面:一是占有主体被规定为“社会自为主体”,二是占有对象被规定为人自身的社会性本质,两者共同构成了共产主义占有方式的本质,人在现实的历史活动中实现了个人与社会、主体性与对象性的辩证统一。