315 research outputs found
A spectral estimation of tempered stable stochastic volatility models and option pricing
No full textThis paper considers alternative option pricing models and their estimation. The stock price dynamics is modeled by taking into account both stochastic volatility and jumps. Jumps are captured by the tempered stable process and stochastic volatility is introduced via time changing the stochastic processes. We propose a characteristic function based iterative estimation method, which overcomes the problem of non-tractable probability density functions of the models and facilitates computation. Estimation results and option pricing performance indicate that the infinite activity stochastic volatility model dominates the finite activity model. We also provide an extension to investigate the double-jump model by introducing jumps in the variance rate process
Heat transfer and visualization of flow boiling on nanowire surfaces in the microchannel
No full textEnhancing heat transfer efficiency is crucial in heat exchange equipment. Although previous studies have focused on developing micro/nano-structured surfaces, further exploration into how surface structure can improve heat transfer efficiency (H) by altering bubble dynamics is still needed. This study aimed to innovatively analyze the impact of titanium carbide (TiC) nanowire heights-specifically 4 mu m and 12 mu m-on boiling heat transfer performance. Conducted under varying heat flux (Q) (50-200 W/m2) and mass flux (G) (200-300 kg/m2 & sdot;s), our experiments assessed H, pressure drop (P), and local boiling curves. Using a high-speed camera, we observed complex periodic flow patterns on the 4 mu m nanowire surface, including elongated bubble formation, expansion, local dryout, and subsequent fluid rewetting. Results showed that the 12 mu m nanowire surface increased H by up to 19.84% in single-phase conditions, while the 4 mu m nanowire surface increased H by up to 27.9% in two-phase conditions. These findings highlight the significant role of nanowire length and arrangement in optimizing boiling heat transfer performance. This work lays a foundation for further investigations into diverse nanowire materials and configurations
sj-docx-1-tct-10.1177_15330338231164191 - Supplemental material for Competitive Risk Model Nomogram to Predict Prognosis in Patients Aged Over 65 Years with nonmetastatic Cervical Cancer: A SEER Population-Based Study
No full textSupplemental material, sj-docx-1-tct-10.1177_15330338231164191 for Competitive Risk Model Nomogram to Predict Prognosis in Patients Aged Over 65 Years with nonmetastatic Cervical Cancer: A SEER Population-Based Study by Shengyuan Jiao, MS, Li Guo, PhD, Fei Da, PhD, Qiaohui Gao, MS, Zhenghua Ren, MS, JianyuWang, MS, Quanwei Fu, PhD, and Junye Liu, PhD in Technology in Cancer Research & Treatment</p
Supplemental Material - Identification and Validation of Serum CST1 as a Diagnostic Marker for Differentiating Early-Stage Non-Small Cell Lung Cancer from Pulmonary Benign Nodules
No full textSupplemental Material for Identification and Validation of Serum CST1 as a Diagnostic Marker for Differentiating Early-Stage Non-Small Cell Lung Cancer from Pulmonary Benign Nodules by Yanzhen Lai, Yu Wang, Yaxian Wu, Meng Wu, Shan Xing, Ying Xie, Shulin Chen, Xiaohui Li, Ao Zhang, Yi He, Huilan Li, Shuqin Dai, Junye Wang, Shudai Lin, Yunmeng Bai, Hongli Du, and Wanli Liu in Cancer Control</p
sj-pdf-1-tct-10.1177_15330338231152350 - Supplemental material for A Randomized Phase III Study of Anlotinib Versus Bevacizumab in Combination With CAPEOX as First-Line Therapy for <i>RAS/BRAF</i> Wild-Type Metastatic Colorectal Cancer: A Clinical Trial Protocol
No full textSupplemental material, sj-pdf-1-tct-10.1177_15330338231152350 for A Randomized Phase III Study of Anlotinib Versus Bevacizumab in Combination With CAPEOX as First-Line Therapy for RAS/BRAF Wild-Type Metastatic Colorectal Cancer: A Clinical Trial Protocol by Jinjie He, Yue Liu, Chengcheng Liu, Hanguang Hu, Lifeng Sun, Dong Xu, Jun Li, Junye Wang, Xiaobing Chen, Rongbo Lin, Yi Jiang, Yanqiao Zhang, Weisheng Zhang, Ying Cheng, Xiaohong Wu, Mingzhi Fang, Enxiao Li, Ye Xu, Ye Chen, Jiayi Li, Yanyan Cui, Zhanyu Pan, Songnan Zhang, Ying Yuan and Kefeng Ding in Technology in Cancer Research & Treatment</p
Study on Mechanical Properties and Structural Deformation of [111] Oriented Mg-Li Alloy
No full textMg-Li alloy is widely used in aerospace and military equipment, but the research on its micromechanical mechanism is still insufficient. In this paper, molecular dynamics simulation is used to analyze the nano-indentation response and mechanical mechanism of single crystal Mg-Li. The deformation and hardness changes of Mg-Li under different loads were studied by load–displacement and hardness–depth curves. At the same time, the dislocation defects and equivalent stress are analyzed to reveal the dislocation formation and stress distribution in the process of deformation. Finally, under the condition of stress relaxation, the mechanical behavior of Mg-Li in the process of nano-indentation was revealed, and the deformation mechanism of Mg-Li alloy was studied
Interface Re-Engineering of Li10GeP2S12 Electrolyte and Lithium anode for All-Solid-State Lithium Batteries with Ultralong Cycle Life
No full textAn ingenious interface re-engineering strategy was applied to in situ prepare a manipulated LiH2PO4 protective layer on the surface of Li anode for circumventing the intrinsic chemical stability issues of Li10GeP2S12 (LGPS) to Li metal, specifically the migration of mixed ionic-electronic reactants to the inner of LGPS, and the kinetically sluggish reactions in the interface. As consequence, the stability of LGPS with Li metal increased substantially and the cycling of symmetric Li/Li cell showed that the polarization voltage could keep relative stable for over 950 h at 0.1 mA cm(-2) within +/- 0.05 V. The optimized ASSLiB of LiCoO2 (LCO)/LGPS/Li with interface-engineered structure was able to deliver long cycle life and high capacity, i.e., a reversible discharge capacity of 131.1 mAh g(-1) at the initial cycle and 113.7 mAh g(-1) at the 500th cycle under 0.1 C with a retention of 86.7%. In addition, the factors effected on the interphases formation of the LGPS/Li interface were analyzed, and the mechanism of the stability between LGPS and Li anode with protective layer was further investigated. Moreover, the probable causes of battery degradation were also explored. Above all, this work would give an alternative strategy for the modification of Li anode in high energy density solid-state lithium metal batteries
Experimental obesrvation of Mimosa Pudica by mechanical stimuli
No full textMimosa Pudica an unique plant that is commonly found in many tropical countries. Well-known for its reaction to stimulations by closing its leaves, it has become widely recognized as the “Shy Plant” or “Sensitive Plant”. Similar to animal, Mimosa pudica has a defensive mechanism by closing its leaves and drooping downwards in response to stimulation. Researchers have dive deeply in experiments and finding possible applications in bioengineering to create a biodegrading memory foam with natural movement with mechanical stimuli.
While many researches have been done towards stimulation sensitive response of Mimosa pudica in terms of its biological signaling and distinctive mechanism. This report aims to extend research into fatigue cycle of Mimosa pudica with repeatedly mechanical stimulation. By analyzing the plant’s increased response latency, through multiple rounds of stimulation, looking to visualise the effect of mechanical stress on the plant by measuring its movement speed, recovery time and sensitivity level.
The experiment will be conducted by touching the petiole of Mimosa pudica, keeping records of every plant sample size, time their closing time and recovery time. Analyze the data recorded statistically and visualise the results through tables and graphs. This report offers a better understanding into the fatigue cycle and mechanism response from the plant.Bachelor's degre
Research Status and Countermeasures of photocatalyst in Water Pollution Treatment
No full textWith economic development and population growth, the demand for fresh water resources is also increasing. However, affected by sewage discharge from industry, agriculture, mining and domestic, not only the ecological environment and natural resources are seriously damaged, but also the water resources available for people to drink are decreasing day by day. How to improve the water pollution treatment technology has become an urgent task. Because of the high cost and great limitation, the traditional treatment method has no significant effect in water pollution control. As an advanced oxidation technology, photocatalyst can effectively degrade pollutants in water pollution, and has a positive effect on improving water quality, protecting natural resources and maintaining ecological balance
An unscented Kalman smoother for volatility extraction: Evidence from stock prices and options
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