A mechanical reliability study of 3-dB waveguide hybrid couplers in submillimeter and terahertz bands

Niu, Zhongqian; Zhang, Bo; Li, Daotong; Ji, Dongfeng; Liu, Yang; Feng, Yinian; Zhou, Tianchi; Yang, Fan

doi:10.1631/fitee.2000229

Cited by 29 publications

(15 citation statements)

References 24 publications

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“…The study of the characteristics of organic/inorganic hybrid perovskites suggests that these materials might be a viable alternative to semiconductor materials such as silicon, as well as semiconductor compounds such as Cu-InGeS (CIGS) and CuZnSnS (CZTS), which are extensively used in various optoelectronic devices [96][97][98][99][100]. Recent advances in the synthesis of inorganic hybrid perovskite nanostructures have increased the importance of HOIPs [101][102][103][104][105][106][107][108].…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: The Effect of Structural Phase Transitions on Electronic and Optical Properties of CsPbI3 Pure Inorganic Perovskites

et al. 2021

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Hybrid inorganic perovskites (HIPs) have been developed in recent years as new high-efficiency semiconductors with a wide range of uses in various optoelectronic applications such as solar cells and light-emitting diodes (LEDs). In this work, we used a first-principles theoretical study to investigate the effects of phase transition on the electronic and optical properties of CsPbI3 pure inorganic perovskites. The results showed that at temperatures over 300 °C, the structure of CsPbI3 exhibits a cube phase (pm3m) with no tilt of PbI6 octahedra (distortion index = 0 and bond angle variance = 0). As the temperature decreases (approximately to room temperature), the PbI6 octahedra is tilted, and the distortion index and bond angle variance increase. Around room temperature, the CsPbI3 structure enters an orthorhombic phase with two tilts PbI6 octahedra. It was found that changing the halogens in all structures reduces the volume of PbI6 octahedra. The tilted PbI6 octahedra causes the distribution of interactions to vary drastically, which leads to a change in band gap energy. This is the main reason for the red and blue shifts in the absorption spectrum of CsPbI3. In general, it can be said that the origin of all changes in the structural, electronic, and optical properties of HIPs is the changes in the volume, orientation, and distortion index of PbI6 octahedra.

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Section: Introductionmentioning

confidence: 99%

RETRACTED: The Effect of Structural Phase Transitions on Electronic and Optical Properties of CsPbI3 Pure Inorganic Perovskites

et al. 2021

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“…SMEs are relatively small in scale. When borrowing from banks and other financial institutions, the collateral assets are relatively small, and it is not easy to obtain investment (Dallasega et al, 2018;Mohelska & Sokolova, 2018;Niu et al, 2021;Yunus & Masron, 2020). At the same time, small and medium-sized enterprises also have their own development characteristics, such as family management, more concentrated ownership.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Research on the investment efficiency based on grey correlation-DEA model

Zhao

Liu

et al. 2021

Ann Oper Res

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Small and medium-sized enterprises (SMEs) are an important part of stimulating market vitality. In the post-pandemic era, the ability of SMEs to absorb employment plays an important role in stabilizing society and promoting economic growth. This paper selects 226 sample data from 2014 to 2017 measures the investment efficiency of small and medium-sized enterprises and makes a further analysis its influencing factors. Because there is a lag between investment and output. In this paper, the grey correlation analysis is used. Measuring the investment efficiency of SMEs by using BBC-DEA method. The study found that the overall investment efficiency of SMEs is low. Considering from the inside of the enterprise, this paper uses the Tobit model to make an empirical analysis. It is found that the influence of board structure and agency cost on investment efficiency are significantly negative. Growth, ownership concentration, equity incentive, salary incentive, profitability of SMEs have a significant positive effect on the investment efficiency of enterprises.

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“…The similarity evaluation model based on the Baire function was introduced to improve the consistency between the basic probability distribution and the real probability, and a new digital signal modulation recognition scheme based on information fusion was proposed. Experiments show that the model has excellent recognition performance (Wang et al, 2018;Niu et al, 2021). Ye et al (2019) proposed a new information fusion method that can make full use of various prediction information and improve prediction performance, and applied it to oil price prediction fusion.…”

Section: Key Technology Analysismentioning

confidence: 99%

Global Multi-Source Information Fusion Management and Deep Learning Optimization for Tourism

2021

Journal of Organizational and End User Computing

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The purpose is to solve the problems of sparse data information, low recommendation precision and recall rate and cold start of the current tourism personalized recommendation system. First, a context based personalized recommendation model (CPRM) is established by using the labeled-LDA (Labeled Latent Dirichlet Allocation) algorithm. The precision and recall of interest point recommendation are improved by mining the context information in unstructured text. Then, the interest point recommendation framework based on convolutional neural network (IPRC) is established. The semantic and emotional information in the comment text is extracted to identify user preferences, and the score of interest points in the target location is predicted combined with the influence factors of geographical location. Finally, real datasets are adopted to evaluate the recommendation precision and recall of the above two models and their performance of solving the cold start problem.

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A mechanical reliability study of 3-dB waveguide hybrid couplers in submillimeter and terahertz bands

Cited by 29 publications

References 24 publications

RETRACTED: The Effect of Structural Phase Transitions on Electronic and Optical Properties of CsPbI3 Pure Inorganic Perovskites

RETRACTED: The Effect of Structural Phase Transitions on Electronic and Optical Properties of CsPbI3 Pure Inorganic Perovskites

RETRACTED ARTICLE: Research on the investment efficiency based on grey correlation-DEA model

Global Multi-Source Information Fusion Management and Deep Learning Optimization for Tourism

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