Searched for: author%3A%22Gong%2C+J.%22
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Gong, J. (author), Wang, Yuan (author), Kamarul Bahrim, Ridhwan Zhafri B. (author), Tewari, Raj Deo (author), Mahamad Amir, Mohammad Iqbal (author), Farajzadeh, R. (author), Rossen, W.R. (author)
Foam is utilized in enhanced oil recovery and CO<sub>2</sub> sequestration. Surfactant-alternating-gas (SAG) is a preferred approach for placing foam into reservoirs, due to it enhances gas injection and minimizes corrosion in facilities. Our previous studies with similar permeability cores show that during SAG injection, several banks occupy...
journal article 2024
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Gong, J. (author)
Quantum computers have gained widespread interest from both industry and academia in the last decade as they are very promising for solving problems intractable by classical computers. However, there is a limited number of qubits in current quantum processors, which impedes the practical applications of a quantum computer. To increase the number...
doctoral thesis 2023
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Gong, J. (author), Wang, Yuan (author), Tewari, Raj Deo (author), Kamarul Bahrim, Ridhwan Zhafri B. (author), Rossen, W.R. (author)
Aqueous foam is a dispersion of gas in liquid, where the liquid acts as the continuous phase and the gas is separated by thin liquid films stabilized by a surfactant. Foam injection is a widely used technique in various applications, including CO2 sequestration, enhanced oil recovery, soil remediation, etc. Surfactant-alternating-gas (SAG) is a...
journal article 2023
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Gong, J. (author), Charbon-Iwasaki-Charbon, E. (author), Sebastiano, F. (author), Babaie, M. (author)
This article presents the first cryogenic phase-locked loop (PLL) operating at 4.2 K. The PLL is designed for the control system of scalable quantum computers. The specifications of PLL are derived from the required control fidelity for a single-qubit operation. By considering the benefits and challenges of cryogenic operation, a dedicated...
journal article 2023
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Gao, Z. (author), He, J. (author), Fritz, Martin (author), Gong, J. (author), Shen, Y. (author), Zong, Z. (author), Chen, Peng (author), Staszewski, R.B. (author), Alavi, S.M. (author), Babaie, M. (author)
In a fractional-N PLL, it is beneficial to minimize the input range of its phase detector (PD) as it promotes better linearity and higher PD gain for suppressing noise contributions of the following loop components. This can be done by canceling the predicted instantaneous time offset between the frequency reference (FREF) and the variable...
conference paper 2022
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Gong, J. (author), Patra, Bishnu (author), Enthoven, L.A. (author), van Staveren, J. (author), Sebastiano, F. (author), Babaie, M. (author)
LC VCOs with low phase noise (PN) and an octave frequency-tuning range (FTR) are required for multistandard communication devices, software-defined radios, and wireline data links. A viable popular approach is to exploit multicore mode-switching VCOs for two reasons: (1) their PN improves linearly by in-phase coupling of N identical VCOs; (2)...
conference paper 2022
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Chen, Y. (author), Gong, J. (author), Staszewski, R.B. (author), Babaie, M. (author)
In this article, we present a 4.5-5.1-GHz fractional-N digitally intensive phase-locked loop (DPLL) capable of maintaining its performance in face of a large supply ripple, thus enabling a direct connection to a switched-mode dc-dc converter. Supply pushing of its inductor-capacitor (LC) oscillator is suppressed by properly replicating the...
journal article 2022
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Gong, J. (author), Charbon-Iwasaki-Charbon, E. (author), Sebastiano, F. (author), Babaie, M. (author)
This article presents a low-jitter and low-spur charge-sampling phase-locked loop (CSPLL). A charge-domain sub-sampling phase detector is introduced to achieve a high phase-detection gain and to reduce the PLL in-band phase noise. Even without employing any power-hungry isolation buffers, the proposed phase detector dramatically suppresses...
journal article 2022
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Enthoven, L.A. (author), van Staveren, J. (author), Gong, J. (author), Babaie, M. (author), Sebastiano, F. (author)
This paper presents a 15b cryo-CMOS DAC for multiplexed spin-qubit biasing implemented in a 22-nm FinFET process. The integrating-DAC architecture and the robust digitally-assisted high-voltage output stage enable a low power dissipation (157W) and small area (0.08mm2) independent of the number of biased qubits, and a 3V output range well...
conference paper 2022
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Gong, J. (author), Chen, Y. (author), Charbon-Iwasaki-Charbon, E. (author), Sebastiano, F. (author), Babaie, M. (author)
This article presents a 4-to-5GHz LC oscillator operating at 4.2K for quantum computing applications. The phase noise (PN) specification of the oscillator is derived based on the control fidelity for a single-qubit operation. To reveal the substantial gap between the theoretical predictions and measurement results at cryogenic temperatures, a...
journal article 2022
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Ren, Jie (author), Wang, Yuan (author), Feng, Di (author), Gong, J. (author)
Large volumes of carbon dioxide (CO<sub>2</sub>) captured from carbon emission source can be stored in deep saline aquifers as a mean of mitigating climate change. The deep saline aquifers are naturally heterogeneous at multiple scales. It is important to generate representative multiscale heterogeneous fields of various hydrogeologic...
journal article 2021
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Gong, J. (author), Flores Martinez, Wendy (author), Vincent-Bonnieu, S.Y.F. (author), Kamarul Bahrim, Ridhwan Zhafri (author), Che Mamat, Che A.Nasser Bakri (author), Tewari, Raj Deo (author), Mahamad Amir, Mohammad Iqbal (author), Farajzadeh, R. (author), Rossen, W.R. (author)
Surfactant-alternating-gas (SAG) is a preferred method of foam injection, which is a promising means of enhanced oil recovery. Liquid injectivity in a SAG process is commonly problematic. Our previous studies suggest that the liquid injectivity can be better than expected due to the existence of a collapsed-foam region formed during the gas...
journal article 2020
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Gong, J. (author), Sebastiano, F. (author), Charbon-Iwasaki-Charbon, E. (author), Babaie, M. (author)
This paper presents a charge-sampling PLL (CSPLL), that demonstrates the best reported jitter-power FOM of-258.9 dB thanks to its high phase-detection gain and to the removal of the power-hungry buffer driving the phase detector. It also achieves-65 dBc of reference spur by both minimizing the modulated capacitance seen by the VCO tank and...
conference paper 2020
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Gong, J. (author), Chen, Yue (author), Sebastiano, F. (author), Charbon-Iwasaki-Charbon, E. (author), Babaie, M. (author)
Low-power, low phase noise (PN) cryogenic frequency generation is required for the control electronics of quantum computers. To avoid limiting the performance of quantum bits, the frequency noise of a PLL should be &lt; 1.9 kHz rms [1]. However, it is challenging for RF oscillators, as the heart of frequency synthesizers to satisfy such a...
conference paper 2020
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Gong, J. (author), Flores Martinez, Wendy (author), Vincent-Bonnieu, S.Y.F. (author), Kamarul Bahrim, Ridhwan Zhafri (author), Che Mamat, Che A Nasser Bakri (author), Tewari, Raj Deo (author), Mahamad Amir, Mohammad Iqbal (author), Farajzadeh, R. (author), Rossen, W.R. (author)
Surfactant-alternating-gas (SAG) is a favored method of foam injection, which has been proved as an efficient way for enhancing oil recovery. However, foam flow is extremely complicated, and there are still unsolved problems for foam application. One is liquid injectivity. Our previous studies suggest that the injectivity in a SAG process is...
journal article 2020
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Gong, J. (author), Vincent-Bonnieu, S.Y.F. (author), Kamarul Bahrim, Ridhwan Z. (author), Mamat, Che A.N.B. (author), Tewari, Raj D. (author), Mahamad Amir, Mohammad I. (author), Groenenboom, Jeroen (author), Farajzadeh, R. (author), Rossen, W.R. (author)
A surfactant alternating gas (SAG) process is often the injection method for foam, on the basis of its improved injectivity over direct foam injection. In a previous study, we reported coreflood experiments on liquid injectivity after foam flooding and liquid injectivity after injection of a gas slug following steady-state foam. Results...
journal article 2020
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Gong, J. (author), Vincent-Bonnieu, S.Y.F. (author), Kamarul Bahrim, Ridhwan Zhafri (author), Che Mamat, Che Abdul Nasser Bakri (author), Tewari, Raj Deo (author), Groenenboom, Jeroen (author), Farajzadeh, R. (author), Rossen, W.R. (author)
Surfactant alternating gas (SAG) is often the injection strategy used for injecting foam into a reservoir. However, liquid injectivity can be very poor in SAG, and fracturing of the well can occur. Coreflood studies of liquid injectivity directly following foam injection have been reported. We conducted a series of coreflood experiments to study...
journal article 2019
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Gong, J. (author), Vincent-Bonnieu, S. (author), Kamarul Bahrim, R. Z. (author), Che Mamat, C.A.N.B. (author), Tewari, R.D. (author), Mahamad Amir, M.I. (author), Groenenboom, J. (author), Farajzadeh, R. (author), Rossen, W.R. (author)
Surfactant-alternating-gas (SAG) is often the injection method for foam enhanced oil recovery (EOR) in order to improve injectivity. However, liquid injectivity can be very poor once foam is created in the near-wellbore region. In a previous study, we reported core-flood experiments on liquid injectivity after foam flooding and liquid...
conference paper 2019
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Gong, J. (author), Vincent-Bonnieu, S.Y.F. (author), Kamarul Bahrim, R. Z. (author), Che Mamat, C. A.N.B. (author), Groenenboom, J. (author), Farajzadeh, R. (author), Rossen, W.R. (author)
Surfactant-alternating-gas (SAG) is a favored method of foam injection, in part because of excellent gas injectivity. However, liquid injectivity is usually very poor in SAG. We report a core-flood study of liquid injectivity under conditions like those near an injection well in SAG application in the field, i.e., after a prolonged period of gas...
journal article 2019
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Gong, J. (author), Rossen, W.R. (author)
If the aperture distribution is broad enough in a naturally fractured reservoir, even one where the fracture network is highly inter-connected, most fractures can be eliminated without significantly affecting the flow through the fracture network. During a waterflood or enhanced-oil-recovery (EOR) process, the production of oil depends on the...
journal article 2018
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