排序方式: 共有22条查询结果,搜索用时 15 毫秒
1.
2.
3.
天津站交通枢纽轨道换乘中心地下工程防水设计 总被引:2,自引:2,他引:0
介绍了天津站交通枢纽轨道换乘中心的工程概况,结合工程具体特点对防水设计原则和设计要求进行了阐述,并对整个工程的防水体系设计进行了详细介绍. 相似文献
4.
Yaoyao Wang Xudong Zhang Wen He Chuanliang Wei Qiaohuan Cheng 《Journal of Materials Science: Materials in Electronics》2017,28(24):18269-18295
Monoclinic Lithium vanadium phosphate [Li3V2(PO4)3, LVP] has been extensively studied because of its attractive electrochemical properties including high specific energy, high specific capacity (133 mAh g?1 in 3.0–4.3 V, 197 mAh g?1 in 3.0–4.8 V), high working voltage (4.0 V), good cycle stability and low price used in rechargeable lithium ion batteries (LIBs). However, the inherent defects such as low conductivity still restrict its practical application in high performance LIBs. Various synthesis methods have been developed in order to improve electrochemical performances of LVP. The results show that the different synthesis methods have great influence on the properties of LVP cathodes for LIBs, so the study on the synthesis method of high performance LVP will continue to be in great demand. This review briefly introduces the present synthesis methods of LVP, such as high-temperature solid-state method, sol–gel method, hydrothermal method, etc. Apart from already established conventional routes, the novel preparation technologies are also mentioned. Moreover, the synthesis mechanism and electrochemical performances of Li3V2(PO4)3 cathode materials synthesized by each synthetic method are reviewed. Finally, the directions for further research and prospective applications for the LVP materials are proposed. 相似文献
5.
6.
7.
8.
Qiaohuan Cheng Yingxue Li Panyu Gao Guanglin Xia Shengnan He Yaxiong Yang Hongge Pan Xuebin Yu 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(38):2302188
Tin sulfide (SnS) is an attractive anode for sodium ion batteries (NIBs) because of its high theoretical capacity, while it seriously suffers from the inherently poor conductivity and huge volume variation during the cycling process, leading to inferior lifespan. To intrinsically maximize the sodium storage of SnS, herein, lithium azides (LiN3)-induced SnS quantum dots (QDs) are first reported using a simple electrospinning strategy, where SnS QDs are uniformly distributed in the carbon fibers. Taking the advantage of LiN3, which can effectively prevent the growth of crystal nuclei during the thermal treatment, the well-dispersed SnS QDs performs superior Na+ transfer kinetics and pseudocapacitive when used as an anode material for NIBs. The 3D SnS quantum dots embedded uniformly in N-doped nanofibers (SnS QDs@NCF) electrodes display superior long cycling life-span (484.6 mAh g−1 after 5800 cycles at 2 A g−1 and 430.9 mAh g−1 after 7880 cycles at 10 A g−1), as well as excellent rate capability (422.3 mAh g−1 at 20 A g−1). This fabrication of transition metal sulfides QDs composites provide a feasible strategy to develop NIBs with long life-span and superior rate capability to pave its practical implementation. 相似文献
9.
利用测井资料进行生油岩评价——以王46井生油岩评价为例 总被引:1,自引:0,他引:1
介绍了生油岩的测井响应特征以及生油岩定性和定量评价方法。利用测井资料评价生油岩的依据是生油岩在不同测井曲线上的响应特征。采用自然伽马能谱测井定性识别生油岩,利用声波法和电阻率法定量计算生油岩参数,根据岩心分析的有机碳含量与铀、钍、钾的关系回归计算评价生油岩等多种方法,对王46井孔店组地层生油岩进行定性和定量评价,并结合岩心分析资料确定出王46井孔店组有机质的丰度、有机质成熟度和有机质类型等。最后依据岩心分析资料,对不同计算方法的计算结果进行误差对比分析,证明了利用测井资料对该井生油岩评价的可靠性。 相似文献
10.
区域自适应的图像修复算法 总被引:1,自引:0,他引:1
针对Criminisi等人提出的基于样本的图像修复算法使用穷尽搜索的方式寻找最优匹配像素块,以及采用固定大小的修复像素块进行修复时产生的错误匹配和信息延伸对图像修复质量的影响,根据像素点周围邻域信息对该像素点的决定作用和结构信息的重要性,提出一种区域搜索和自适应模板图像修复方法,以增强信息的局部协调性和边界信息的恢复能力,提高图像整体的修复效果。大量实验表明,改进算法在减少修复时间的同时,能较好地保持图像的结构,从而使修复结果达到更好的视觉效果。 相似文献