Jie Jie Chen

US Patent:

55352715, Jul 9, 1996

Filed:

May 27, 1994

Appl. No.:

8/250783

Inventors:

Shrirang Jangi - Germantown MD
Jie Chen - North Potomac MD

Assignee:

Hughes Electronics - Los Angeles CA

International Classification:

H04M 100

US Classification:

379351

Abstract:

A DTMF digit detecting method and apparatus includes signal state identifier (32) for identifying whether the received signal is in a DTMF-digit-detect state, a no-detect high-energy state, or a no-detect low-energy state, digit candidate identification processor (34) for identifying a digit candidate when the presence of a state other than the no-detect low-energy state is detected following a detection of the presence of the no-detect low-energy state for a first predetermined period of time, digit identifier (32) for identifying a DTMF digit corresponding to a sample group in a DTMF-digit-detect state, and valid digit identifier (34) for identifying a valid DTMF digit when at least a first predetermined number of sample groups are all in the DTMF-digit-detect state or in an allowable combination of states. An allowable combination of states exists provided the following conditions are met: (1) at least half of the first predetermined number of sample groups are in the DTMF-digit-detect state and correspond to the same DTMF digit; (2) no two sequential sample groups are in a state other than the DTMF-digit-detect state; and (3) no two sequential sample groups in the DTMF-digit-detect state correspond to one or more DTMF digits other than the DTMF digit corresponding to at least half of the first predetermined number of sample groups.

US Patent:

57132089, Feb 3, 1998

Filed:

Apr 3, 1996

Appl. No.:

8/627868

Inventors:

Jie Chen - Coralville IA
Joseph R. Adamski - Cedar Rapids IA
Ali Goshayeshi - Cedar Rapids IA
Bruce Janvrin - Coralville IA

Assignee:

Amana Refrigeration Inc. - Amana IA

International Classification:

F25B 2102
F25D 1704

US Classification:

62 37

Abstract:

A thermoelectric cooling apparatus includes a plurality of thermoelectric coolers each having a hot side and a cold side. The cold sides of the thermoelectric coolers are arranged to cool an object. The hot sides of the thermoelectric coolers are provided with a heat sink. The heat sink may include a eutectic material which maintains the hot sides of the thermoelectric coolers at a low temperature so that the cold sides of the thermoelectric coolers are able to maintain the object at a cold temperature. The heat sink may have fins for rejecting heat, and air moving means for moving air over the fins to aid in the rejection of heat from the hot sides of the thermoelectric coolers. The fins may be cooled by the eutectic material.

US Patent:

20180128528, May 10, 2018

Filed:

Nov 10, 2016

Appl. No.:

15/348571

Inventors:

Jie Chen - Saint Charles MO, US
Jan Pottinger - O'Fallon MO, US

International Classification:

F25B 45/00

Abstract:

A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device includes calculating a target superheat as a function of one or more of a measured field outdoor dry bulb temperature, and a measured field indoor wet bulb temperature. A charge adjustment percentage can be calculated as a function of the target superheat. A refrigerant adjustment weight can be determined based on the charge adjustment percentage. A field refrigeration system charge can be adjusted by the refrigerant adjustment weight.

US Patent:

20180128529, May 10, 2018

Filed:

Nov 10, 2016

Appl. No.:

15/348659

Inventors:

JIE CHEN - SAINT CHARLES MO, US
JAN POTTINGER - O'FALLON MO, US

International Classification:

F25B 45/00

Abstract:

A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device includes calculating a field subcooling of the field refrigeration system as a function of a measured field liquid line pressure and a measured field liquid line temperature. A charge adjustment percentage can be calculated as a function of the field subcooling, a measured field indoor wet bulb temperature, and a measured field outdoor dry bulb temperature. A refrigerant adjustment weight can be determined based on the charge adjustment percentage. A field refrigeration system charge can be adjusted by the refrigerant adjustment weight.

US Patent:

20170154181, Jun 1, 2017

Filed:

May 26, 2015

Appl. No.:

15/313785

Inventors:

- Washington DC, US
Jie CHEN - Arlington VA, US

International Classification:

G06F 21/55
G06F 21/85

Abstract:

A system detects a covert timing channel on a combinational structure or a memory structure. The system identifies the events behind conflicts, and constructs an event train based on those events. For combinational structures, the system detects recurrent burst patterns in the event train. The system determines that a covert timing channel exists on the combinational structure if a recurrent burst pattern is detected. For memory structures, the system detects oscillatory patterns in the event train. The system determines that a covert timing channel exists on the memory structure if an oscillatory pattern is detected.