We establish the construction theory of function based upon a local field Kp as underlying space. By virture of the concept of pseudo-differential operator, we introduce ＂fractal calculus＂ （or, p-type calculus, or,...We establish the construction theory of function based upon a local field Kp as underlying space. By virture of the concept of pseudo-differential operator, we introduce ＂fractal calculus＂ （or, p-type calculus, or, Gibbs-Butzer calculus）. Then, show the Jackson direct approximation theorems, Bermstein inverse approximation theorems and the equivalent approximation theorems for compact group D（C Kp） and locally compact group Kp^＋-（= Kp）, so that the foundation of construction theory of function on local fields is established. Moreover, the Jackson type, Bernstein type, and equivalent approximation theorems on the HOlder-type space C^σ（Kp）, σ 〉0, are proved; then the equivalent approximation theorem on Sobolev-type space Wr（Kp）, σ≥0, 1≤r 〈∞, is shown.展开更多
Based on sine and cosine functions, the compactly supported orthogonal wavelet filter coefficients with arbitrary length are constructed for the first time. When N = 2(k-1) and N = 2k, the unified analytic constructio...Based on sine and cosine functions, the compactly supported orthogonal wavelet filter coefficients with arbitrary length are constructed for the first time. When N = 2(k-1) and N = 2k, the unified analytic constructions of orthogonal wavelet filters are put forward, respectively. The famous Daubechies filter and some other well-known wavelet filters are tested by the proposed novel method which is very useful for wavelet theory research and many application areas such as pattern recognition.展开更多
Reverse logistics are playing more and more important role with the development of competition and the social responsibility of enterprises.It could be divided into commission acceptance,recycling and returned goods h...Reverse logistics are playing more and more important role with the development of competition and the social responsibility of enterprises.It could be divided into commission acceptance,recycling and returned goods handling.Reverse logistics information system consists of the database establishment,network structure and logic structure design.The collection,storage,processing,transmission and output functions of the reverse logistics information system were discussed in the thesis.Eventually,it established seven modules for the reverse logistics information system including the system management module,oriented module,returning goods processing module,reverse transportation management module,information sharing module,statistical analysis module and cost control module.展开更多
背景:研究证实运动对多发性硬化症具有潜在的改善作用,但具体机制尚不完全清楚。目的:总结多发性硬化症患者的生理功能变化,探讨运动改善多发性硬化症患者生理功能的机制。方法:应用计算机检索Web of Science、PubMed、中国知网、万方...背景:研究证实运动对多发性硬化症具有潜在的改善作用,但具体机制尚不完全清楚。目的:总结多发性硬化症患者的生理功能变化,探讨运动改善多发性硬化症患者生理功能的机制。方法:应用计算机检索Web of Science、PubMed、中国知网、万方和维普数据库等,中文检索词为“多发性硬化症,脱髓鞘自身免疫疾病,运动,体育锻炼,神经退行性疾病”等,英文检索词为“Multiple sclerosis,Demyelinating Autoimmune Diseases,Exercise,Physical activity,Neurodegenerative diseases”等,文献检索时限为各数据库建库至2024年6月,根据预定的纳入和排除标准,最终筛选出81篇文献进行综述。结果与结论:多发性硬化症患者的生理和功能变化复杂多样,严重影响患者的生活质量和独立生活能力。运动作为一种非药物干预方式,在改善多发性硬化症患者的生理和功能状态方面显示出显著潜力,运动可以缓解疲劳、调节免疫反应、降低压力激素水平、增强血脑屏障功能及促进神经可塑性。然而,当前关于运动治疗多发性硬化症的具体机制研究仍然不足,需要更多高质量、系统性的研究来进一步验证和完善相关结论。未来的研究应聚焦于以下几个方面:进一步探索不同类型和强度运动对多发性硬化症患者生理功能和病情进展的具体影响,找出最适合多发性硬化症患者的运动方案;开展大规模、长期随访的临床试验,验证运动对多发性硬化症患者的长期效果和安全性;结合现代科技手段,如功能性磁共振成像和神经电生理技术,深入揭示运动干预对多发性硬化症患者神经系统的具体作用机制;考虑患者个体差异,制定个性化的运动干预方案,以最大程度地提高干预效果和患者依从性。展开更多
文摘We establish the construction theory of function based upon a local field Kp as underlying space. By virture of the concept of pseudo-differential operator, we introduce ＂fractal calculus＂ （or, p-type calculus, or, Gibbs-Butzer calculus）. Then, show the Jackson direct approximation theorems, Bermstein inverse approximation theorems and the equivalent approximation theorems for compact group D（C Kp） and locally compact group Kp^＋-（= Kp）, so that the foundation of construction theory of function on local fields is established. Moreover, the Jackson type, Bernstein type, and equivalent approximation theorems on the HOlder-type space C^σ（Kp）, σ 〉0, are proved; then the equivalent approximation theorem on Sobolev-type space Wr（Kp）, σ≥0, 1≤r 〈∞, is shown.
文摘Based on sine and cosine functions, the compactly supported orthogonal wavelet filter coefficients with arbitrary length are constructed for the first time. When N = 2(k-1) and N = 2k, the unified analytic constructions of orthogonal wavelet filters are put forward, respectively. The famous Daubechies filter and some other well-known wavelet filters are tested by the proposed novel method which is very useful for wavelet theory research and many application areas such as pattern recognition.
基金Course Construction of Customs Practice,China(No.z201308003)
文摘Reverse logistics are playing more and more important role with the development of competition and the social responsibility of enterprises.It could be divided into commission acceptance,recycling and returned goods handling.Reverse logistics information system consists of the database establishment,network structure and logic structure design.The collection,storage,processing,transmission and output functions of the reverse logistics information system were discussed in the thesis.Eventually,it established seven modules for the reverse logistics information system including the system management module,oriented module,returning goods processing module,reverse transportation management module,information sharing module,statistical analysis module and cost control module.
