Abstract: Heat transfer compositions, and systems and methods using the composition, comprising: (a) a refrigerant comprising at least about 30% by weight based on all refrigerant components of trans-1-chloro-3,3,3-trifluoropropene (HFCO-1233zd(E)); and at least one compound inhibiting isomerization of said trans-1-chloro-3,3,3-trifluoropropene (HFCO-1233zd(E)) to cis-1-chloro-3,3,3-trifluoropropene (HFCO-1233zd(Z)), said at least one compound being selected from the group consisting of d-limonene, 2,6-diisopropyl naphthalene, ?-pinene, farnesene, ?-terpinene and combinations of two or more of these.

Abstract: Disclosed are cascaded refrigeration systems, comprising: a plurality of refrigeration units, each refrigeration unit containing a first refrigeration circuit, each first refrigeration circuit comprising an evaporator and a heat exchanger, and a second refrigeration circuit; wherein each first circuit heat exchanger is arranged to transfer heat energy between its respective first refrigeration circuit and the second refrigeration circuit.

Abstract: Methods for improving a refrigeration systems comprising modifying the system and replacing existing refrigerant with a replacement refrigerant comprising: (1) at least about 50% by weight of R1234ze(E); (2) greater than 0% to about 11% of HFC-134a, HFC-134, HFC-227ea, HFC-125, and combinations of two or more of these; and (3) from about 4% to about 20% by weight of HFO-1336mzz(E), HFO-1224yd(Z), and combinations of these, wherein said second refrigerant: (i) has an Occupational Exposure Limit (OEL) greater than 400; (ii) is classified as class A1 by ASHRAE Standard 34; and (iii) has a GWP of about 150 or less.

Abstract: The present invention relates to heat transfer compositions comprising 1234yf refrigerant, PAG lubricant and dispersant and to methods of retrofitting R134a MAC systems with using such compositions.

Abstract: The present invention relates to heat transfer compositions comprising 1234yf refrigerant, PAG lubricant and surfactant and to methods of retrofitting R134a MAC systems with using such compositions.

Abstract: Method for retrofitting an existing heat transfer system comprising adding to said existing system a refrigerant consisting essentially of: (i) from about 25% to about 45% by weight of 1,1,1,2-tetrafluoroethane (HFC-134a); (ii) from 25% to about 35% by weight of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and/or 2,3,3,3-tetrafluoropropene (HFO-1234yf); and (iii) from about 37% to about 46% by weight of a combination of difluoromethane (HFC-32) and pentafluoroethane (HFC-125), provided that the weight ratio of HFO-32:HFC-125 is from about 1.21:1 to about 0.8:1, wherein the refrigerant preferably is a non-flammable refrigerant having a GWP of 1350 or less.

Abstract: Methods for forming an improved, centralized refrigeration systems by: (a) providing an existing refrigeration circuit with an existing high GWP refrigerant; (b) disconnecting the fluid connection between the existing refrigerant liquid from the condenser and the evaporators; (c) disconnecting the fluid connection between the existing refrigerant vapor from the evaporators and the compressor suction; (d) establishing a new first refrigeration circuit comprising the compressor and the condenser; (e) establishing a new second refrigeration circuit comprising the evaporators by removing existing refrigerant from the evaporators and the disconnected conduits and replacing the removed refrigerant with a second refrigerant comprising at least 50% of R1234ze(E) and being Class Al and having an OEL greater than 400 and a GWP of about 150 or less; and thermally interconnecting the new first refrigeration circuit and the new second refrigeration circuit with an inter-circuit heat exchanger.

Abstract: The present invention relates refrigerants which include HFO-1233zd. HFO-1234ze(E), and HFC-134a and the use of such refrigerants in high temperature heat pumps.

Abstract: A receiver receives a wireless signal comprising a plurality of fields including a legacy short training field (L-STF), legacy long training field (L-LTF), and legacy signal (L-SIG) field transmitted to a plurality of antenna of the receiver. For each sub-band in a receiver bandwidth and when samples of the L-STF is received, a first angle based autocorrelation is performed to determine a group of sub-bands which maximize a magnitude based on the first autocorrelations for one or more sub-bands. For each sub-band in the receiver bandwidth and when samples of the L-LTF is received, a second angle based autocorrelation is then performed to refine the crude bandwidth pattern estimate. One or more signal fields and one or more data fields of the received signal are decoded based on the refined bandwidth pattern estimate.

Abstract: A beamformee receives a channel coefficient matrix H of a wireless communication channel between a beamformer and the beamformee. The channel coefficient matrix is a 2×N complex matrix having two rows corresponding to two antenna of the beamformee and N columns corresponding to N antenna of the beamformer. A real symmetric matrix M is determined based on the matrix H followed by determining eigenvalues and eigenvectors of matrix M. Singular vectors of the matrix H based on the eigenvectors are determined where the singular vectors define a steering matrix. The steering matrix is transmitted to a beamformer, wherein a beam is steered by the beamformer to the beamformee based on the steering matrix.

Abstract: Methods for improving a refrigeration systems comprising modifying the system and replacing existing refrigerant with a replacement refrigerant comprising: (1) at least about 50% by weight of R1234ze(E); (2) greater than 0% to about 11% of HFC-134a, HFC-134, HFC-227ea, HFC-125, and combinations of two or more of these; and (3) from about 4% to about 20% by weight of HFO-1336mzz(E), HFO-1224yd(Z), and combinations of these, wherein said second refrigerant: (i) has an Occupational Exposure Limit (OEL) greater than 400; (ii) is classified as class A1 by ASHRAE Standard 34; and (iii) has a GWP of about 150 or less.

Abstract: The present disclosure relates to a system and method for electronic design automation. Embodiments may include loading one or more libraries, netlists, or constraints associated with an electronic design and loading parasitic data associated with the electronic design. Embodiments may further include performing a self adaptive, infinite depth, path based analysis on at least a portion of the electronic design. Embodiments may also include analyzing the electronic design based upon, at least in part, the self adaptive, infinite depth, path based analysis.

Abstract: The present invention relates to refrigerants which include HFO-1233zd, HFO-1234ze(E), and HFC-152a and the use of such refrigerants in high temperature heat pumps.

Abstract: Systems, apparatuses, methods, and computer program products are provided herein. For example, an embodiment described herein includes a heat pump and a heat pump operations apparatus. In some embodiments, the heat pump may be configured to receive a waste heat input from a data center. The waste heat input is associated with a first temperature. In some embodiments, the heat pump may be configured to receive a power input from a power source. In some embodiments, the heat pump may be configured to generate an asset operations heat output based at least in part on the waste heat input and the power input. The asset operations heat output is associated with a second temperature. The second temperature is greater than the first temperature. In some embodiments, the heat pump may be configured to providing the asset operations heat output to an asset.

Abstract: The present invention relates to heat transfer systems and methods involving zinc-containing surfaces in contact with a working fluid comprising refrigerant, lubricant and a protective agent comprising a compound according to Formula I: where R and R1 are each independently selected from the group consisting of hydrogen, alkyl, hydroxyalkyl and alkylthio, provided that at least one of R and R1 is alkylthio.

Abstract: A transmitter, including: a plurality of antennas; and a controller configured to: receive a first steering matrix for a first feedback tone; receive a second steering matrix for a second feedback tone; estimate an ideal second steering matrix including: estimating a set of random phasors applied to the columns of the second feedback matrix; and estimating a set of row-dependent delays applied to the rows of the second feedback matrix; estimate a vector of angles based upon the estimated set of random phasors; and calculate a steering matrix for a tone between the first feedback tone and the second feedback tone by interpolating between the first steering matrix and the ideal second steering matrix based upon the estimated vector of angles.

Abstract: One example discloses a method for beamforming feedback reduction in a WLAN (wireless local area network), including: generating a per-tone beamforming feedback matrix by vectorizing a set of steering vectors using vectorization based dimension reduction (DR-Vec); performing lossy compression on the vectors; reducing the per-tone beamforming feedback matrix to one vector; and generating per-tone beamforming angle information using only the one vector.

Abstract: Embodiments of a wireless device and method are disclosed. In an embodiment, a wireless device comprises a wireless transceiver arranged to receive and transmit signals, and a controller operably coupled to the wireless transceiver to process the signals, wherein the controller is configured to transmit the signals to different end devices using different sized bandwidths, wherein the signals transmitted to a first end device use a first bandwidth of a first size and the signals transmitted to a first end device use a second bandwidth of a second size.

Abstract: Non-flammable refrigerants with low GWP and secondary refrigerant systems including such refrigerants are provided. The refrigeration system may contain a high temperature refrigerant circuit with a first refrigerant and a low temperature refrigerant circuit with a second refrigerant, wherein the second refrigerant comprises a blend of R1234ze(Z), R1234ze(E), R1336mzz(E) and optionally R227ea, or a blend of R1234ze(Z) R1234ze(E) R1224yd(Z), and optionally R(227ea). The refrigerant fluids may have one of the following characteristics: (i) a global warming potential (GWP) of less than 150; (ii) an evaporator glide of less than 5.5° C.; (iii) non-flammability according to ASHRAE Standard 34; and/or (iv) a boiling point of less than 6° C.

Abstract: In an IEEE 802.11 wireless system, a sharing AP device (1A) shares a transmission opportunity with a shared AP device (2A) by transmitting a coordinated spatial reuse opportunity announcement control frame packet having defined signal fields which are used by the shared AP device (2A) to compute a transmit power limit for limiting interference at a first sharing STA device (1S) associated with the sharing AP device (1A) when transmitting one or more first downlink packets from the shared AP device (2A) to a first shared STA (2S) device associated with the shared AP device (2A).