Abstract: The present invention discloses a high-fidelity entangled link generation method based on quantum time-space, the method comprising: directing, by a communication provider, a laser beam to a nonlinear crystal, thereby enabling probabilistically bursting out of a photon beam, and polarizing the photon beam to be in an entangled state; at an entanglement distribution stage, enabling entangled photons to traverse through quantum trajectories, and generating a distributed entangled photon state between a first communication node and a second communication node to construct an elementary entangled link; the first communication node or the second communication node is required to select the same measurement basis for m control qubits when m copies of entangled photon pairs from entanglement source are assumed to be distributed through quantum trajectories to communication nodes with the time interval ?, such that 2m memory qubits of two adjacent nodes may store m exactly the same distributed entangled states.

Abstract: The present invention discloses a high-fidelity entangled link generation method based on quantum time-space, the method comprising: directing, by a communication provider, a laser beam to a nonlinear crystal, thereby enabling probabilistically bursting out of a photon beam, and polarizing the photon beam to be in an entangled state; at an entanglement distribution stage, enabling entangled photons to traverse through quantum trajectories, and generating a distributed entangled photon state between a first communication node and a second communication node to construct an elementary entangled link; the first communication node or the second communication node is required to select the same measurement basis for m control qubits when m copies of entangled photon pairs from entanglement source are assumed to be distributed through quantum trajectories to communication nodes with the time interval ?, such that 2 m memory qubits of two adjacent nodes may store m exactly the same distributed entangled states.

Abstract: Disclosed are methods, systems, and computer-readable medium for data wrangling. For instance, the method may include: determining one or more data operations to be performed on a multi-dimensional dataset; determining at least one operation type associated with the one or more data operations to be performed; dividing the multi-dimensional dataset into a plurality of sub-tables based on the operation type; providing the plurality of sub-tables to a data wrangling process, the one or more data operations being performed on each of the plurality of sub-tables in parallel to determine a processed plurality of sub-tables; and determining, based on the processed plurality of sub-tables, a finished multi-dimensional dataset. The data wrangling process may process sub-tables (e.g., change-only columns/rows) of tables of the multi-dimensional dataset and/or process sub-tables in parallel for data operations that are not related.

Abstract: Disclosed are methods, systems, and computer-readable medium for data wrangling. For instance, the method may include: determining one or more data operations to be performed on a multi-dimensional dataset; determining at least one operation type associated with the one or more data operations to be performed; dividing the multi-dimensional dataset into a plurality of sub-tables based on the operation type; providing the plurality of sub-tables to a data wrangling process, the one or more data operations being performed on each of the plurality of sub-tables in parallel to determine a processed plurality of sub-tables; and determining, based on the processed plurality of sub-tables, a finished multi-dimensional dataset. The data wrangling process may process sub-tables (e.g., change-only columns/rows) of tables of the multi-dimensional dataset and/or process sub-tables in parallel for data operations that are not related.

Abstract: A current-mode DC-to-DC converter operating in a high frequency is disclosed. The current-mode DC-to-DC converter includes an inductor, a power switch, an oscillator, an adder without internal feedback loop, an error amplifier, a comparator, a compensation unit and a driver. The adder adds a ramp signal from the oscillator directly to a voltage signal relative to a current flowing through the power switch and generates a sum signal based upon match between internal components in the oscillator and the adder.

Abstract: A current-mode DC-to-DC converter operating in a high frequency is disclosed. The current-mode DC-to-DC converter includes an inductor, a power switch, an oscillator, an adder without internal feedback loop, an error amplifier, a comparator, a compensation unit and a driver. The adder adds a ramp signal from the oscillator directly to a voltage signal relative to a current flowing through the power switch and generates a sum signal based upon match between internal components in the oscillator and the adder.

Abstract: The present invention is an inverter controller with feed-forward compensation. The inverter controller includes an error amplifier, a high frequency oscillator (HFOSC) with feed-forward compensation, a comparator, and a driver. The error amplifier can output a signal independent on the variation of a supply voltage. The HFOSC can generate a saw-tooth signal with a constant frequency and an amplitude proportional to the supply voltage. The comparator can compare the signal with the saw-tooth signal and generate a pulse width modulation signal whose duty cycle varies with the variation of the supply voltage. The driver receives the PWM signal and provides a proper pulse width modulation signal to drive an external inverter.

Abstract: The present invention is an inverter controller with feed-forward compensation. The inverter controller includes an error amplifier, a high frequency oscillator (HFOSC) with feed-forward compensation, a comparator, and a driver. The error amplifier can output a signal independent on the variation of a supply voltage. The HFOSC can generate a saw-tooth signal with a constant frequency and an amplitude proportional to the supply voltage. The comparator can compare the signal with the saw-tooth signal and generate a pulse width modulation signal whose duty cycle varies with the variation of the supply voltage. The driver receives the PWM signal and provides a proper pulse width modulation signal to drive an external inverter.

Abstract: The present invention relates to a new bimetallic complex catalyst system having the empirical formula of M.sup.1.sub.a M.sup.2.sub.b X.sub.m (L.sub.1).sub.n, wherein M.sup.1 is Rh or Ru, M.sup.2 is Ru or a lanthanide, when M.sup.1 is Rh, M.sup.2 is Ru or a lanthanide; when M.sup.1 is Ru, M.sup.2 is a lanthanide; X is H, Cl, Br or the combinations thereof; L.sub.1 is the ligand to the metal salt; 1.ltoreq.a.ltoreq.4; 1.ltoreq.b.ltoreq.2; 3.ltoreq.m.ltoreq.6; 6.ltoreq.n.ltoreq.15. The present invention also relates to a corresponding improved process for the hydrogenation of unsaturated copolymers, particularly NBR type rubber, wherein the above mentioned new bimetallic complex catalyst system is used.