排序方式: 共有15条查询结果,搜索用时 15 毫秒
1.
Zong ChunYan Gao QingYu Wang YuMei Feng JiaMin Mao ShanCheng Zhang Lu 《中国科学B辑(英文版)》2007,50(2):205-211
The ferroin-catalyzed Belousov-Zhabotinsky(BZ) reaction,the oxidation of malonic acid by acidic bromate,is the most commonly investigated chemical system for understanding spatial pattern forma-tion. Various oscillatory behaviors were found from such as mixed-mode and simple period-doubling oscillations and chaos on both Pt electrode and Br-ISE at high flow rates to mixed-mode oscillations on Br-ISE only at low flow rates. The complex dynamic behaviors were qualitatively reproduced with a two-cycle coupling model proposed initially by Gy?rgyi and Field. This investigation offered a proper medium for studying pattern formation under complex temporal dynamics. In addition,it also shows that complex oscillations and chaos in the BZ reaction can be extended to other bromate-driven nonlinear reaction systems with different metal catalysts. 相似文献
2.
In this paper, the global result on bifurcation given by P. H. Rabinowitz is extended tostrictly set-contractive maps and condensing maps. 相似文献
3.
Wu WanQing Cai QingYu Wu ShuoMei Zhang HuanGuo 《International Journal of Theoretical Physics》2019,58(6):1854-1860
Recently, Ye et al. (Int. J. Theor. Phys. 56, 1517–1529, 2017) proposed a quantum private comparison (QPC) protocol based on five-qubit entanglement state. Two parties can verify that their secret information is equal or not with the help of the semi-honest third party (TP). However, in this paper we will point out the Ye et al.’s initial protocol is not safe under a special participant attack. That is a malicious participant can get the other party’s secret input information illegally under the forgery attack. Furthermore, we give two possible improvement protocols, which can perform this protocol secure against this kind of attack.
相似文献4.
The ferroin-catalyzed Belousov-Zhabotinsky (BZ) reaction, the oxidation of malonic acid by acidic bromate, is the most commonly investigated chemical system for understanding spatial pattern formation. Various oscillatory behaviors were found from such as mixed-mode and simple period-doubling oscillations and chaos on both Pt electrode and Br-ISE at high flow rates to mixed-mode oscillations on Br-ISE only at Iow flow rates. The complex dynamic behaviors were qualitatively reproduced with a two-cycle coupling model proposed initially by Gy(o)rgyi and Field. This investigation offered a proper medium for studying pattern formation under complex temporal dynamics. In addition, it also shows that complex oscillations and chaos in the BZ reaction can be extended to other bromate-driven nonlinear reaction systems with different metal catalysts. 相似文献
5.
Fang Wang GePu Guo QingYu Ma MinFeng Gu XuYing Wu Shenjun Sheng Xiaoshu Wang 《Journal of Thermal Analysis and Calorimetry》2013,113(3):1113-1121
Thermogravimetric analysis and dynamic mechanical analysis were combined with scanning electron microscopy to analyze the thermo-mechanical properties and thermal stability of polylactic acid (PLA) foams fabricated using a solvent-free solid-state gas foaming method. The dependence of decomposition time and the lifetime on the PLA cell size was evaluated based on the thermal decomposition kinetic analyses. The results show that PLA specimens with larger cell sizes can be made at lower saturation gas pressures, which will ensure that the fabricated PLA foams have a shorter decomposition time, better flexibility, and are more satisfactory for medical requirements of tissue engineering scaffold (TES) material. The current work may help to optimize the PLA foaming parameters and precisely design PLA foams with different decomposition times according to specific TES requirements of different organ structures. 相似文献
6.
A novel copolymer P(CS–Ma–DMAEMA) was synthesized with chitosan (CS), maleic anhydride (Ma) and 2-(dimethylamino)ethyl methacrylate (DMAEMA) by grafting and copolymerization. The copolymer obtained was analyzed by FT-IR, 1H NMR and UV, and the molecular weight and polydispersity were determined by gel permeation chromatography (GPC). The average size and distribution of copolymer micelles were determined by dynamic light scattering (DLS). Their aqueous solution properties and controlled coenzyme A delivery were also studied. It was found that the copolymer had temperature sensitivity and pH sensitivity. The factors affecting release behavior, such as concentration, pH and temperature were discussed in this paper. The higher concentration of the copolymer aqueous solution absorbed more coenzyme A than the lower one. The increasing temperature accelerated the drug release from the copolymer. The pH of the copolymer solution had significant impact on the release of coenzyme A. The results suggested that the novel copolymer could be used as drug delivery carrier. 相似文献
7.
Wang Fang Sheng Shenjun Ge Xuefeng Huang Heyong Ma QingYu 《Journal of Thermal Analysis and Calorimetry》2019,135(5):2849-2856
Journal of Thermal Analysis and Calorimetry - Exploring the mechanism of the interaction between milrinone drug and lysozyme is important for us to understand the transportation in vivo, metabolism... 相似文献
8.
It seems there is a large gap between quantum cloning and classical duplication since quantum mechanics forbid perfect copies of unknown quantum states. In this paper, we prove that a classical duplication process can be realized by using a universal quantum cloning machine(QCM). A classical bit is encoded not on a single quantum state, but on a large number of single identical quantum states. Errors are inevitable when copying these identical quantum states due to the quantum no-cloning theorem. When a small part of errors are ignored, i.e., errors as the minority are automatically corrected by the majority, the fidelity of duplicated copies of classical information will approach unity infinitely. In this way, the classical bits can be duplicated precisely with a universal QCM, which presents a natural transition from quantum cloning to classical duplication. The implement of classical duplication by using QCM shines new lights on the universality of quantum mechanics. 相似文献
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10.
WanQing Wu QingYu Cai HuanGuo Zhang XiaoYan Liang 《International Journal of Theoretical Physics》2018,57(6):1705-1715
Quantum public key encryption system provides information confidentiality using quantum mechanics. This paper presents a quantum public key cryptosystem (QPKC) based on the Bell states. By Holevo’s theorem, the presented scheme provides the security of the secret key using one-wayness during the QPKC. While the QPKC scheme is information theoretic security under chosen plaintext attack (CPA). Finally some important features of presented QPKC scheme can be compared with other QPKC scheme. 相似文献