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一类带有Dirichlet边界条件的分数阶对流弥散方程解的多重性
Multiple Solutions for a Class of Fractional Advection-Dispersion Equation with Dirichlet Boundary Conditions  [PDF]
王怡
Advances in Applied Mathematics (AAM) , 2020, DOI: 10.12677/AAM.2020.96112
Abstract:
本文研究了带有Dirichlet边界条件的分数阶对流弥散方程耦合系统的多解问题。基于变分方法和一个三临界点定理，我们得到了该分数阶系统至少有三个解的结果。
This article concerns multiple solutions for a coupled system of fractional advection-dispersion equation with Dirichlet boundary conditions. Using variational methods and a three-critical point theorem, we obtain that the fractional system has at least three solutions.
一类分数阶导数微分方程的隐式差分解法
An Implicit Finite Difference Scheme for Space-Time Fractional Partial Differential Equation  [PDF]
张阳, 王瑞怡
Operations Research and Fuzziology (ORF) , 2013, DOI: 10.12677/ORF.2013.32002
Abstract:
分数阶导数微分方程作为通常微分方程的推广，被广泛地应用于工程，物理，信息处理，金融，水文等领域。本文给出了数值求解一类时间空间分数阶导数的双边空间微分方程的一种隐式差分格式，并对其稳定性和收敛性进行了理论分析，证明了格式的无条件稳定性并给出了收敛阶估计。
Fractional order differential equations are generalizations of classical differential equations. They are widely used in the fields of diffusive transport, finance, nonlinear dynamics, signal processing and others. In this paper, an implicit finite difference method for a class of initial-boundary value space-time fractional two-sided space partial differential equations with variable coefficients on a finite domain is established. The stability and convergence order are analyzed for the resulted implicit scheme. With mathematical induction skills, the scheme is proved to be unconditionally stable and convergent.
基于同态加密域的自适应提升小波
Adaptive Lifting Wavelet Scheme Based on Homomorphic Encrypted Domain  [PDF]
吴怡宣, 王晅
Computer Science and Application (CSA) , 2019, DOI: 10.12677/CSA.2019.94075
Abstract:
随着信息时代的不断发展，信息安全与隐私保护问题越来越受到人们的重视，由于有价值的信号可能受到恶意攻击，因此它们必须在加密的域中进行处理。本文利用Paillier密码系统的同态特性，对加密域内的待处理信号进行小波分解，提出了一种加密的自适应提升小波方法。此外，还提出了采用加密的LBP方案对细节信号进行编码的方法，这些方法用于服务器在没有私钥的情况下进行数据处理，从而避免敏感信息泄露是非常有用的。我们进行了加密域的重构实验、水印实验和掌纹分类实验，验证了我们提出加密域自适应提升小波的有效性和可行性。
With the development of information industry, data privacy’s protection becomes a necessary issue to face with. Since the valuable signals need to be protected from a malicious device, they must be processed in an encrypted domain. In this paper, we proposed an encrypted adaptive lifting wavelet method by using the homomorphic properties of Paillier’s cryptosystem to act wavelet decomposition on pending signal in encrypted domain. In addition, the implementation of encrypted LBP scheme is also proposed to encode detail signal which is prerequisite for classification work. The mentioned works are useful for classification servers to process data without private-key so that the sensitive message will not divulge. We conduct some experiments include reconstruction, simplified watermarking, and palmprint classification experiments in encrypted domain to demonstrate the usefulness and feasibility of our encrypted processing work.
儿童早期的主动学习表现
Early Childhood Active Learning Performance  [PDF]
赵黎, 王明怡
Advances in Psychology (AP) , 2020, DOI: 10.12677/AP.2020.103044
Abstract:
主动控制是主动学习的核心要素。近期对婴幼儿主动学习的研究较为活跃，发现在因果关系领域，婴儿的主动控制行为尚需要成人的支持协作，幼儿及学龄儿童已能独立通过主动学习方式完成一些因果推理任务，且学习表现优于指导学习，但在言语词汇领域，婴幼儿主动学习优势尚不明显。主动学习能提升个体的短时及长时记忆，对信息的主动控制能使学习过程更高效。未来可进一步探讨执行功能、教养方式、文化差异等与主动学习的关系。
Active control is the core element of active learning. Recently, there have been some advances in infant active learning. In the field of causality, infants’ active control behavior still requires adult support and collaboration. Preschool and school-age children can independently complete some causal reasoning tasks through active learning, and their performance is better than that of didactic learning. However, the advantages of active learning are not prominent in the word-learning. Active learning can enhance the short-term and long-term memory. The active control of information can make the learning process more efficient. In the future, we can further explore the relationship between executive function, parenting styles, cultural differences and active learning.
国内马拉松赛事与其举办城市经济发展的研究
Research on Domestic Marathon and Its Host City’s Economic Development  [PDF]
王薇, 许鑫怡
Advances in Social Sciences (ASS) , 2020, DOI: 10.12677/ASS.2020.94080
Abstract:
在本文章，我们综合运用文献资料、数理统计和案例分析等研究方法，对国内马拉松赛事与举办城市经济发展进行了研究。研究结果表明：国内马拉松赛事的举办依赖于城市的经济发展水平，城市的强大的经济实力和旅游业发展的高水平都对举办马拉松赛事的数量和质量有着重要的积极影响。同时马拉松赛事能促进城市旅游业的发展，刺激游客对第三产业的消费；并且能推动赛事运营、运动品牌、运动APP等马拉松产业的形成；以及马拉松产业与其他产业的融合使得产业结构的得以转型，给城市带来丰厚经济效益。并以扬州为例，进行了相关的分析，为扬州马拉松赛事的举办和扬州经济的发展提供建议。
In this paper, we comprehensively use literature, mathematical statistics, case analysis and other research methods to study the economic development of marathon events and host cities in China. The results show that the holding of marathon events in China depends on the level of economic de-velopment of the city, and the strong economic strength of the city and the high level of tourism de-velopment have important positive effects on the quantity and quality of marathon events. At the same time, marathon can promote the development of urban tourism and stimulate the consump-tion of tourists in the tertiary industry. Moreover, it can promote the formation of marathon indus-try such as event operation, sports brand and sports APP. As well as the integration of marathon in-dustry with other industries, the industrial structure can be transformed, bringing rich economic benefits to the city. Taking Yangzhou as an example, this paper makes relevant analysis and pro-vides suggestions for the holding of Yangzhou marathon and the development of Yangzhou economy.
基于变分自编码的语气语音合成模型
A Speech Synthesis Model with Mood Based on Variational Autoencoder  [PDF]
王研, 吴怡之
Computer Science and Application (CSA) , 2020, DOI: 10.12677/CSA.2020.1012227
Abstract:
语气作为一种重要情感表达信息，对说话人内容的表达起着重要作用。目前语音合成系统缺乏对语气的良好支持，合成语音也表现出乏味、单一的缺点。为了解决上述问题，提高合成语音的自然度，本文将统计参数语音合成(Statistical Parameter Speech Synthesis, SSPS)与具有强学习能力的变分自编码(Variational Autoencoder, VAE)模型相结合，以无监督的方式学习说话人潜在的语气信息，再通过加入分类器提高模型语气学习的准确率。我们提出了语气语音合成的系统框架，分为三部分：声学模型、语气模型以及合成模型。待合成的目标文本和语气分别利用声学模型与语气模型重构出的包括基频F0的声学特征。最后，将声学特征输入到WORLD声码器合成出带有目标语气的语音信号。本篇文章使用Blizzard Challenge 2018作为模型训练的语料库，最后通过实验结果表明，所提出的模型具有良好的语气生成性能。
Mood as the important emotional expression information plays an important role in the expression of the speaker’s content. The current speech synthesis system lacks good support for mood and synthetic speech also shows the shortcomings of monotonous and boring. In order to solve the above problems and improve the naturalness of the synthesized speech, we use Statistical Parameter Speech Synthesis (SSPS) and Variational Autoencoder (VAE) model with strong learning ability to learn the speaker’s potential mood information in an unsupervised manner, and then improve the accuracy of model mood learning by adding classifiers. We propose a systematic framework for speech synthesis with mood, which is divided into three parts: an acoustic model, a speech mood model, and a synthetic model. The target text and mood to be synthesized are reconstructed using the acoustic features including the fundamental frequency F0 using the acoustic model and the mood model, respectively. Finally, the acoustic features are input into the WORLD vocoder to synthesize speech signals with target mood. This article uses Blizzard Challenge 2018 as a corpus for model training, and finally, the experimental results show that the proposed model has a good performance for mood generation.
探索全民网课时代下的师范生媒介素养
Exploring the Media Literacy of Normal Students in the Age of Online Education  [PDF]
王怡娴, 李先锋
Advances in Social Sciences (ASS) , 2021, DOI: 10.12677/ASS.2021.104122
Abstract: 受新冠疫情的影响，我国教育迅速进入全民网课时代，师范生作为中小学网课中的最直接的重要媒介把关人，人们对其媒介素养的测量并不充分。对此，本研究对358名师范高校内师范生展开媒介素养调查。通过数据的因子分析，我们发现了组成师范生新媒介素养结构的12个成分；通过多变量方差分析，我们发现师范生公民参与、媒介接触度对其新媒介素养具有显著影响。
Under the influence of the COVID-19 pandemic situation, the education of our country has entered the era of people studying online quickly. As the most direct and important media gatekeepers, normal university students’ media literacy has not been adequately measured. In this study, 358 normal college students were investigated by a media literacy questionnaire. Through the factor analysis of the data, we found 12 components that formed the new media literacy structure of normal school students, and through multivariate analysis of variance, we found that the citizen participation and media exposure of normal university students had a significant effect on their new media literacy.
复杂数据上的实体识别综述
A Survey of Entity Recognition on Complex Data  [PDF]
王诗怡, 贺萍
Computer Science and Application (CSA) , 2021, DOI: 10.12677/CSA.2021.115164
Abstract:
复杂数据的数据量大和数据源不同的特征导致在挖掘复杂数据中的潜在价值时，需要利用实体识别技术。实体识别技术能实现对传统数据进行完整刻画、对数据质量进行管理的重要操作。而在复杂数据进行实体识别具有识别效果差、识别精度不高等问题。本文首先从应用领域的角度探讨复杂数据上的实体识别技术，包括社交网络领域的敏感实体识别、军事领域的目标实体识别、商业领域的商情实体识别。其次，对不同领域中的各个实体识别常用方法进行对比，分析了各个方法的问题与不足。最后，对在不同领域中进行实体识别的难点进行总结。
Complex data is characterized by a large amount of data and different data sources, which lead to the use of entity recognition technology in mining the potential value of complex data. Entity recognition technology can realize some important operations, such as complete description of traditional data and data quality management. However, entity recognition technology applied in complex data has the problems of poor recognition effect and low recognition accuracy. This paper first discusses entity recognition technology on complex data from the perspective of application field, including sensitive entity recognition in social network field, target entity recognition in military field and business entity recognition in commercial field. Secondly, the usual methods of entity recognition in different fields are compared, and the problems and shortcomings of each method are analyzed. Finally, the difficulties of entity recognition in different fields are summarized.
三种紫金牛属植物的木材解剖学研究
Wood Anatomy Research of Three Plants of Ardisia Swartz  [PDF]
王露露, 刘欣怡, 王军
World Journal of Forestry (WJF) , 2021, DOI: 10.12677/WJF.2021.104019
Abstract: 为了更好地识别紫金牛属(Ardisia Swartz)的铜盆花(A. obtusa Mez)、矮紫金牛(A. humilis Vahl)及大罗伞树(A. hanceana Mez)的木材解剖学特征，本文从植物树皮、木材宏观及微观构造进行了详细观测。研究表明：以上三者的树皮棕褐色至灰绿色，厚度0.5~2.0 mm；木材几无光泽；生长轮不明显，3~5轮/cm；导管横切面常具多角形轮廓；径列复管孔为主，管孔链2~6个，管孔团常见；管孔弦径15~50 μm，多数20~35 μm；导管分子长度(铜盆花160~640 μm、矮紫金牛80~280 μm、大罗伞树220~625 μm)；导管分子穿孔为单穿孔，穿孔板斜列或平行；轴向薄壁组织无或不明显；木射线非叠生，异形II型，多列；木射线密度(铜盆花10~16根/mm、矮紫金牛2~3根/mm、大罗伞树3~5根/mm)；木射线宽度(铜盆花2~6细胞、矮紫金牛3~9细胞、大罗伞树1~3细胞)；木射线高度除铜盆花外常超过切片范围；木射线间距(铜盆花46~188 μm、矮紫金牛80~640 μm、大罗伞树400~1080 μm)；木射线细胞大小(铜盆花和矮紫金牛常大于管孔，大罗伞树常小于管孔)；木射线细胞形状(铜盆花和大罗伞树通常为长圆形，矮紫金牛多数为多角形)；木射线中段偶见收窄，在铜盆花和矮紫金牛中常见上下两段射线由“S”形纤维隔开；髓心细胞形状(铜盆花和大罗伞树为多角形，而矮紫金牛为圆形至椭圆形)；铜盆花的髓心细胞含有晶体，并形成晶簇；矮紫金牛的髓心具有丰富的维管束。
In order to better identify the wood anatomical characteristics of Ardisia obtusa Mez, A. humilis Vahl and A. haceana Mez. The macrostructure and microstructure of wood and bark of the plants were observed in detail. The experiment results indicated that: The three species above: bark sepia to greyish-green, 0.5~2.0 mm; wood dull to little gloss; growth ring not obvious, 3~5 circle/cm; the shape of vessel cross section often has polygonal outline; radial multiple pore is mainly, pore chain 2~6, pore group common; tangential diameter 15~50 μm, 20~35 μm mostly; length of vessel element (A. obtusa 160~640 μm, A. humilis 80~280 μm, A. hanceana 220~625 μm); single perforation, the perforation plates of vessel element oblique or parallel; axial parenchyma without or not obvious; the Wood rays are not superimposed, heterogeneous II type and multiseriate; timber ray den-sity (A. obtusa 10~16/mm, A. humilis 2~3/mm, A. hanceana 3~5/mm); timber ray width (A. obtusa 2~6 cells, A. humilis 3~9 cells, A. hanceana 1~3 cells); timber ray height often beyond the range of section except for A. obtusa; timber ray spacing (A. obtusa 46~188 μm, A. humilis 80~640 μm, A. hanceana 400~1080 μm); timber ray cell size (A. obtusa and A. humilis often greater than pore size, A. hanceana often less than pore size); timber ray cell shape (A. obtusa and A. hanceana usually ob-long, A. humilis usually polygonal); timber ray narrows in the middle occasionally, separated by “S” shaped fiber usually in A. obtusa and A. hanceana; pith cell shape (A. obtusa and A. hanceana are polygonal mostly, A. humilis is round to elliptic); the pith cell of A. obtusa contains crystals, which form clusters; the pith core of A. humilis has abundant vascular bundles.
论长孙无忌与初唐政治
王怡
北京大学学报(哲学社会科学版) , 2014,
Abstract: 长孙无忌历仕唐高祖、太宗、高宗三朝,位尊权重。其在初唐政坛上之大作为,一是佐太宗夺嫡,一是定高宗储君地位,皆挟私心以为帝王个人效力,自始至终皆非唐朝社稷之臣。其在太宗朝,慑于太宗之英武,加以长孙皇后之约束,以善避嫌疑获得保全并为太宗所倚重。其在高宗朝,则因误认高宗柔懦,专擅政柄,终于招致杀身之祸。
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