Study on the Thermal Transient Response of TSV Considering the Effect of Electronic-Thermal Coupling

Li, Chunquan,Zou, Meng-Qiang,Shang, Yuling,Zhang, Ming The Institute of Electronics and Information Engin 2015 Journal of semiconductor technology and science Vol.15 No.3

The transmission performance of TSV considering the effect of electronic-thermal coupling is an new challenge in three dimension integrated circuit. This paper presents the thermal equivalent circuit (TEC) model of the TSV, and discussed the thermal equivalent parameters for TSV. Si layer is equivalent to transmission line according to its thermal characteristic. Thermal transient response (TTR) of TSV considering electronic-thermal coupling effects are proposed, iteration flow electronic-thermal coupling for TSV is analyzed. Furthermore, the influences of TTR are investigated with the non-coupling and considering coupling for TSV. Finally, the relationship among temperature, thickness of $SiO_2$, radius of via and frequency of excitation source are addressed, which are verified by the simulation.

Study on the Thermal Transient Response of TSV Considering the Effect of Electronic-Thermal Coupling

Chunquan Li,Meng-Qiang Zou,Yuling Shang,Ming Zhang 대한전자공학회 2015 Journal of semiconductor technology and science Vol.15 No.3

The transmission performance of TSV considering the effect of electronic-thermal coupling is an new challenge in three dimension integrated circuit. This paper presents the thermal equivalent circuit (TEC) model of the TSV, and discussed the thermal equivalent parameters for TSV. Si layer is equivalent to transmission line according to its thermal characteristic. Thermal transient response (TTR) of TSV considering electronic-thermal coupling effects are proposed, iteration flow electronic-thermal coupling for TSV is analyzed. Furthermore, the influences of TTR are investigated with the noncoupling and considering coupling for TSV. Finally, the relationship among temperature, thickness of SiO₂, radius of via and frequency of excitation source are addressed, which are verified by the simulation.

Three narrow band-gap semiconductors modified Z-scheme photocatalysts, Er3+:Y3Al5O12@NiGa2O4/(NiS, CoS2 or MoS2)/Bi2Sn2O7, for enhanced solar-light photocatalytic conversions of nitrite and sulfite

Xue Ma,Chunquan Wang,Guowei Wang,Guanshu Li,Siyi Li,Jun Wang,Youtao Song 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.66 No.-

Three Z-scheme photocatalysts, Er3+:Y3Al5O12@NiGa2O4/NiS/Bi2Sn2O7, Er3+:Y3Al5O12@NiGa2O4/CoS2/Bi2Sn2O7 and Er3+:Y3Al5O12@NiGa2O4/MoS2/Bi2Sn2O7, are designed for synchronous conversions of nitrite and sulfite and fabricated by sol-hydrothermal and calcination methods. In these Z-scheme photocatalysts, three narrow band-gap semiconductors as “conductive ladder” are inserted between Er3+:Y3Al5O12@NiGa2O4 and Bi2Sn2O7 to accelerate the electron transfer from conduction band of Bi2Sn2O7 to valence band of NiGa2O4. Er3+:Y3Al5O12 as an up-conversion luminescence agent (from visible-light to ultraviolet-light) provides enough ultraviolet-light for satisfying the energy demand of wide band-gap NiGa2O4. The prepared photocatalysts are characterized by UV–vis diffuse reflectance spectra (DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffractometer (XRD), Fourier transform infrared (FT-IR) spectra and photoluminescence (PL) spectra. The photocatalytic activity of prepared photocatalysts is evaluated via conversions of nitrite and sulfite under simulated solar-light irradiation. The results show that the prepared Er3+:Y3Al5O12@NiGa2O4/NiS/Bi2Sn2O7, Er3+:Y3Al5O12@NiGa2O4/CoS2/Bi2Sn2O7 and Er3+:Y3Al5O12@NiGa2O4/MoS2/Bi2Sn2O7 composites exhibit the high and stable photocatalytic activity during the conversions of nitrite and sulfite. The highest conversion ratios (86.23% and 94.44%) for nitrite and sulfite can be obtained when the Er3+:Y3Al5O12@NiGa2O4/NiS/Bi2Sn2O7 is adopted as photocatalyst under simulated solar-light irradiation. Meanwhile, the effect of simulated solar-light irradiation time and corresponding reaction kinetics on photocatalytic conversions of nitrite and sulfite are also studied. Subsequently, the study of used times shows that the prepared Z-scheme photocatalysts can be effectively reused without an apparent inactivation on photocatalytic activity. These results demonstrate that the Er3+:Y3Al5O12@NiGa2O4/NiS/Bi2Sn2O7 is a potential Z-scheme photocatalyst to be used in actual conversions of nitrite and sulfite under solar-light irradiation.

A highly active Z-scheme NiGa2O4/anthraquinone/MoO3 photocatalyst via charge transfer for sunlight photocatalytic simultaneous conversions of nitrite and sulfite

Xue Ma,Siyi Li,Zhihui Qu,Meng Zhang,Jing Qiao,Xin Cui,Chunquan Wang,Jun Wang,Youtao Song 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.78 No.-

The separation efficiency of photogenerated electron-hole pairs (e –h+) is an important factor for ahighly photocatalytic activity of Z-scheme photocatalytic system. In order to suppress the recombining ofphotogenerated e and h+ and enhance the electron transfer rate, anthraquinone (AQ) as special electrontransfer channel is combined with NiGa2O4 and MoO3, forming a Z-scheme NiGa2O4/AQ/MoO3photocatalyst. Due to unique chemical and physical properties, AQ provides a novel electron transmissionway. Compared with traditional conductive channels (for example, noble metals and graphene), in thisway, the AQ may greatly enhance the electron transfer efficiency. In addition, the related morphology,optical properties and chemical composition were investigated by a sequence of characterizationmethods. The influences of photocatalyst species, irradiation time and used times in simultaneouslyconverting nitrite and sulfite under simulated sunlight were also studied. The results indicate that theprepared Z-scheme NiGa2O4/AQ/MoO3 photocatalyst exhibits a much high activity. The conversion ratesof nitrite and sulfite can reach 89.81% and 94.47%, respectively, under simulated sunlight irradiation forfour hours. The enhanced photocatalytic activity is attributed to the fact that AQ can rapidly transferelectron by inner charge transfer. This charge transfer way can provide a new idea to design subsequentphotocatalysts.

A Decomposition-Based Improved Broad Learning System Model for Short-Term Load Forecasting

Cheng Yuxin,Le Haozhe,Li Chunquan,Huang Jiehui,Liu Peter X. 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.5

It is still a challenging problem for most existing forecasting methods to obtain accurate and rapid prediction performance in short-term load forecasting because of the complexity and non-linearity of the electric load signals. To solve this problem, this paper proposes a hybrid forecasting model. In this hybrid forecasting model, an effi cient hybrid decomposition method is fi rst developed by a new combination mechanism between the ensemble empirical mode decomposition, approximate entropy, and empirical wavelet transform, enhancing the effi ciency and accuracy problems of traditional decomposition methods. Afterward, a new hybrid neural network called broad learning system-back propagation (BLS-BP) is established to predict multiple signal sequences from the proposed hybrid decomposition method. Specifi cally, in the proposed BLS-BP, a broad learning system can eff ectively reduce the computational cost, however, BP can eff ectively improve the prediction accuracy. Therefore, a reasonable combination of BLS and BP is established to obtain the compromise between computational cost and prediction accuracy. Finally, to improve the generalization ability of the model, a hybrid network based on the sliding window and cross-validation method is proposed, further improving the predictive accuracy. Owing to the novel and eff ective cooperation of the above three aspects, the proposed hybrid forecasting model has higher accuracy, faster effi ciency, and better robustness compared with other state-of-the-art algorithms. The experimental result demonstrates the above facts.

Correction to: A Decomposition-Based Improved Broad Learning System Model for Short-Term Load Forecasting

Cheng Yuxin,Le Haozhe,Li Chunquan,Huang Jiehui,Liu Peter X. 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.6

Comparison of Lipoxygenase Activity Characteristics in Aqueous Extracts from Milk-stage Sweet Corn and Waxy Corn

Liying Niu,Dajing Li,Chunquan Liu,Fuguo Liu 한국식품과학회 2015 Food Science and Biotechnology Vol.24 No.3

Lipoxygenases (LOX) in milk-stage sweet corn and waxy corn were extracted using a phosphate buffer (pH 7.0) and enzyme activities were determined using linoleic acid as a substrate. Michaelis constant (Km) values, decimal reduction times (D value), temperature sensitivity parameters (Z value), and activation energies (Ea) were calculated. Enzymes from both corn types followed first-order inactivation kinetics within 0-25 min and 50- 70℃. However, enzymes exhibited different pH profiles and affinities toward linoleic acid. Km values (4.34 and 1.40 mM for sweet corn and waxy corn, respectively), heat stability values, and Ea values (116.81 and 246.82 kJ/mol) were different. Waxy corn LOX was more heat stable below 65℃ with a higher D value, but was more temperature sensitive with a lower Z value. The different characteristics suggested the presence of different isoenzymes and necessitated the use of different parameters for blanching.