Search results for: Zhiwei Su

Items from 1 to 8 out of 8 results

article

Surface Passivation with Tailoring Organic Potassium Salt for Efficient FAPbI₃ Perovskite Solar Cells and Modules

Shujie Zhang, Ting Tian, Jing Li, Zhiwei Su, more

Advanced Functional Materials > 34 > 36 > n/a - n/a

Passivating surface defects on perovskite films with tailored functional materials has emerged as one of the most effective strategies for achieving high‐performance perovskite solar cells (PSCs). Among existing material selections, potassium salts stand out for their effective passivation of defects surrounding perovskite grain boundaries. However, the widely used potassium salts are inorganic and...

article

Pricing executive stock options with averaging features under the Heston–Nandi GARCH model

Zhiwei Su, Xingchun Wang

Journal of Futures Markets > 39 > 9 > 1056 - 1084

In this paper, we focus on the pricing issue of four types of executive stock options (ESOs) in the Heston–Nandi generalized autoregressive conditional heteroskedasticity option pricing model. Based on the derived benchmark strike prices in the proposed framework, we obtain the closed‐form pricing formulae for four types of ESOs. In the numerical part, we investigate the sensitivity and cost efficiency...

article

The modeling, analysis, and application of the in-process machining data for CNC machining

Huicheng Zhou, Minglang Lang, Pengcheng Hu, Zhiwei Su, more

The International Journal of Advanced Manufacturing Technology > 2019 > 102 > 5-8 > 1051-1066

As the Computer Numerical Control (CNC) machining is executing, a large volume of in-process machining data is generated simultaneously in the CNC system, such as the interpolation point, actual feed rate, and tracking error. As a comprehensive reflection of entire CNC machining process, those types of data can be utilized to analyze the machining process and evaluate the machining results, especially...

article

Three-axis CNC machining feedrate scheduling based on the feedrate restricted interval identification with sliding arc tube

Zhiwei Su, Huicheng Zhou, Pengcheng Hu, Wei Fan

The International Journal of Advanced Manufacturing Technology > 2018 > 99 > 1-4 > 1047-1058

In the computer numerical control (CNC) machining for free form surfaces, the time-optimized and smooth feedrate profile plays an essential role in the high-speed and high-precision machining. For the traditional feedrate scheduling method (e.g., the “bang-bang” control method), there may be many fluctuations in the planned feedrate profile, especially in region of large curvature, which results in...

article

Vibration transmission suppression for propeller-shaft system by hub-embedded damping ring under broadband propeller force

Xiuchang Huang, Zhiwei Su, Zhenguo Zhang, Hongxing Hua

Nonlinear Dynamics > 2018 > 91 > 4 > 2651-2666

To suppress the vibration of propeller blades and vibration transmission from the blades to bearings under broadband propeller force, a damping ring placed under the propeller hub is proposed. The configuration of the damping ring is introduced first. Then the analytical dynamic model of the damping ring is established. The dynamic model of the propeller-shaft-multiple bearings system with and without...

article

N-Containing Phytochemicals from the Seeds of Brucea javanica

Zhiwei Su, Zhonghui Ma, Li Ye, Buming Liu, more

Chemistry of Natural Compounds > 2017 > 53 > 4 > 799-801

Published in Khimiya Prirodnykh Soedinenii, No. 4, July–August, 2017, pp. 679–680.

article

Light-weight, flexible, low-voltage electro-thermal film using graphite nanoplatelets for wearable/smart electronics and deicing devices

Han Jiang, Huatao Wang, Ge Liu, Zhiwei Su, more

Journal of Alloys and Compounds > 2017 > 699 > C > 1049-1056

Recently, graphene and graphene-based materials used as heating materials have attracted more and more attention due to their outstanding performance. However, a relatively high voltage of 12–60 V has to be applied for heating because of their high sheet resistance of 43–2600 Ω sq⁻¹. In this paper, light-weight and flexible electro-thermal films using graphite nanoplatelets (GNP) by gap coating and...

chapter

Optimization control method with system condition online monitor for cleaning process

Wenbo Na, Zhiwei Su, Ling Wang

2012 Proceedings of International Conference on Modelling, Identification and Control > 883 - 888

2012 International Conference on Modelling, Identification and Control (ICMIC)

The cleaning process is an important step in sugar refinery and features strong nonlinearity, a long sampling time to obtain quality data, multiple constraints imposed by practical requirements, its control goal is to acquire high density products. This paper presented an intelligent optimization control method, using improved back-propagation neural networks modeling of quality prediction and system...

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