排序方式: 共有19条查询结果,搜索用时 812 毫秒
1.
Li Yuanchao Xu Guangri Fan Shumin Ma Jingjing Shi Xiaohui Long Zaixin Deng Wenjie Fan Wenxiu Yang Shuting 《Journal of Solid State Electrochemistry》2020,24(4):821-828
Journal of Solid State Electrochemistry - Synthesis method is crucial to the improved electrochemical performances of LiMnPO4 materials with poor electronic and ionic conductivity for large-scale... 相似文献
2.
Zaixin Lu Lidong Wu Panos M. Pardalos Eugene Maslov Wonjun Lee Ding-Zhu Du 《Optimization Letters》2014,8(2):425-434
In wireless networks, Connected Dominating Sets (CDSs) are widely used as virtual backbones for communications. On one hand, reducing the backbone size will reduce the maintenance overhead. So how to minimize the CDS size is a critical issue. On the other hand, when evaluating the performance of a wireless network, the hop distance between two communication nodes, which reflect the energy consumption and response delay, is of great importance. Hence how to minimize the routing cost is also a key problem for constructing the network virtual backbone. In this paper, we study the problem of constructing applicable CDS in wireless networks in terms of size and routing cost. We formulate a wireless network as a Disk-Containment Graph (DCG), which is a generalization of the Unit-Disk Graph (UDG), and we develop an efficient algorithm to construct CDS in such kind of graphs. The algorithm contains two parts and is flexible to balance the performance between the two metrics. We also analyze the algorithm theoretically. It is shown that our algorithm has provable performance in minimizing the CDS size and reducing the communication distance for routing. 相似文献
3.
In order to tackle both regional and global foot-and-mouth disease virus (FMDV) epdimics, we hereby develop a rapid microfluidic thermal lens microscopic method to screen swine type O FMDV with good efficiency. The scheme has great merits in terms of field portability, sample volume, assay time, analytical sensitivity, and test reproducibility. 相似文献
4.
从具有全局最优解的几何活动轮廓方法出发,分别提出了两种基于齐次Besov窄间与小波变换的图像分割算法,并给出了解的存在性证明.数值求解利用小波软阈值以及分裂Bregman方法,能够有效提高计算效率.由于小波变换具有多分辨特性,对于包含较多细节信息的图像,采用新算法能够得到更好的分割效果.数值实验表明采用新算法能够获得较... 相似文献
5.
The synthesis and characterization of three new unsymmetrical porphyrins is reported. These porphyrins are isomers and have not been reported previously. A new method was used to synthesize the porphyrins which is different from the general synthetic porcedure which was developed by Adler [1]. The structural assignment of the three isomers was based on the elemental analyses, UV-Vis, IR, and 1HNMR spectra. 相似文献
6.
Chenchen Wu Yishui Wang Zaixin Lu Panos M. Pardalos Dachuan Xu Zhao Zhang Ding-Zhu Du 《Mathematical Programming》2018,169(1):255-275
In this paper, we consider the maximum and minimum versions of degree-concentrated fault-tolerant spanning subgraph problem which has many applications in network communications. We prove that both this two problems are NP-hard. For the maximum version, we use DC programming relaxation to propose a heuristic algorithm. Numerical tests indicate that the proposed algorithm is efficient and effective. For the minimum version, we also formulate it as a DC program, and show that the DC algorithm does not perform well for this problem. 相似文献
7.
阳极溶出催化伏安法测定微量钯的研究 总被引:1,自引:0,他引:1
本文提出了用阳极溶出催化伏安法测定微量钯的方法,找到了灵敏度较高的富集底液和催化体系,钯在3×1010-1×10-7M浓度范围内呈线性关系,最低检出浓度为1.2×10-10M。 相似文献
8.
In the linear nonlocal elasticity theory, the solution to the boundary-value problem of the crack with a constant stress boundary
condition does not exist. This problem has been studied in this paper. The contents studied contain of examining objectivity
of the energy balance, deducing the constitutive equations of nonlocal thermoelastic bodies, and determining nonlocal force
and the linear nonlocal elasticity theory. Some new results are obtained. Among them, the stress boundary condition derived
from the linear theory not only solves the problem mentioned at the beginning, but also contains the model of molecular cohesive
stress on the sharp crack tip advanced by Barenblatt. 相似文献
9.
使用经典极谱法测定碲的灵敏度往往不能令人满意,后来出现了溶出伏安法和极谱催化波都提高了灵敏度。至于把二者结合起来应用于碲的测定尚未见报导。本法是把碲电解富集在工作电极上,然后在选定的催化体系中溶出,使其产生溶出催化波,从而提高了灵敏度。 相似文献
10.
Jiaxiang He Dawei Zhang Zaixin He Bin Yuan Hongzhang Hu 《Chinese Journal of Lasers》1993,2(6):549-556
So far it has been difficult to show up the state of blood flow in choroid due to its position underlying behind the retina anatomically. This paper presents the principle and the method of data analysis in the measurement of the choroidal blood flow-time curve by means of laser interferometry. Preliminary investigations show that this technique may be important in the diagnosis of multiple arteritis and prediction of cerebral ischemic disturbances. 相似文献