Abstract: An estimation system generates, from a value of a time series of an estimation object in a past period, a plurality of patterns of a transition of a value of the estimation object. Based on the plurality of generated patterns and a value of a time series of a factor in the past period, the estimation system specifies a dependency relationship between a transition pattern and a value of the factor and a transition pattern at a past (or future) time point and identifies a model in accordance with the specified dependency relationship. By inputting a value of a time series of the factor in a future period to the estimation model, the estimation system specifies a time series of a value in the future period of the estimation object using at least one transition pattern.

Abstract: According to an embodiment, a communication control method includes: establishing, by a smart repeater (SR) wireless terminal capable of beamforming, a wireless connection to a base station, the SR wireless terminal controlling an SR device relaying wireless communication between the base station and a wireless terminal; and transmitting, by the SR wireless terminal to the base station through wireless communication, SR device information indicating at least one of a capability of the SR device and a control state of the SR device.

Abstract: A communication control method used in a mobile communication system including a gNB 200 and a UE performing wireless communication with the gNB 200, the communication control method including: establishing, by an RIS-UE 100B, a wireless connection with the gNB 200, the RIS-UE 100B controlling an RIS device 500 that changes a propagation direction of a radio wave incident from the gNB 200; and transmitting, by the RIS-UE 100B to the gNB 200 through wireless communication, RIS device information indicating at least one of a capability of the RIS device 500 and a control state of the RIS device 500.

Abstract: A communication control method used in a mobile communication system including a gNB and a UE performing wireless communication with the gNB, the communication control method including: establishing, by an RIS-UE, a wireless connection with the gNB, the RIS-UE controlling an RIS device that changes a propagation direction of a radio wave incident from the gNB; and transmitting, by the gNB to the RIS-UE through the wireless communication, one or more pieces of RIS control information used to control the RIS device.

Abstract: A piezoelectric element having a piezoelectric body and an electrode in contact with the piezoelectric body: the piezoelectric body being formed of a lead-free piezoelectric ceramic composition which includes a primary phase formed of an alkali niobate-based perovskite oxide represented by a compositional formula (A1aM1b)c(Nbd1Mnd2Tid3Zrd4Hfd5)O3+e (wherein element A1 represents at least one species among the alkali metals; element M1 represents at least one species among Ba, Ca, and Sr; the following conditions: 0<a<1, 0<b<1, a+b=1, 0.80<c<1.10, 0<d1<1, 0<d2<1, 0<d3<1, 0?d4<1, 0?d5<1, and d1+d2+d3+d4+d5=1, are satisfied; and e represents a value showing the degree of deficiency or excess of oxygen) and which satisfies the condition: b/(d3+d4+d5)?1, and the electrode containing a base metal as a main component.

Abstract: A bus control method for communication between a plurality of communication devices, the bus control method including: a first communication device and a second communication device communicating via a bus structured with a first connection port and a second connection port; the first communication device sending a first send request signal on the bus to the second communication device via the first connection port; the second communication device sending a second send request signal on the bus to the first communication device via the second connection port; and on the basis of the first send request signal and the second send request signal, performing control such that the bus accepts data from one connection port of the first connection port and the second connection port, wherein the first send request signal and the second send request signal are respectively different signals.

Abstract: A modulation module includes a first modulation circuit that, upon receiving input of first setting information including first information designating a modulation mode, outputs a prescribed auxiliary signal as a first output signal, but upon receiving input of second setting information including second information designating a different modulation mode from the first information, outputs a first modulation signal generated by subjecting an input signal to modulation processing based on the second setting information as the first output signal. The modulation module further includes a second modulation circuit that is configured to output, as a second output signal, a signal generated by combining a second modulation signal generated by modulation processing and the first output signal.

Abstract: A correction circuit including: a first selector and a second selector that each select and output either of a first input signal or a second input signal, the first input signal and the second input signal having phases that are orthogonal to one another; a first multiplier carrying out multiplication of an output of the first selector and a first coefficient; a second multiplier carrying out multiplication of an output of the second selector and a second coefficient; a first adder carrying out addition of the first input signal and a multiplication result of the first multiplier; and a second adder carrying out addition of the second input signal and a multiplication result of the second multiplier, wherein an addition result of the first adder and an addition result of the second adder are outputted from a first output terminal and a second output terminal, respectively.

Abstract: A trigonometric function calculating device includes: an address generator that generates an address signal that is formed from plural bit strings and corresponds to a phase; a trigonometric function table that stores first sines and first cosines that respectively correspond to phases expressed by upper bits of the address signals, and second sines and a second cosines that respectively correspond to phases expressed by lower bits of the address signals; a calculation circuit that outputs, as a calculated value, a sine that corresponds to the address signal by calculating processing using the first sine, the first cosine, the second sine and the second cosine that correspond to the address signal and have been extracted by referring to the trigonometric function table; and a correcting section that corrects the calculated value on the basis of a correction value corresponding to the address signal.

Abstract: A trigonometric function calculating device includes: an address generator that generates an address signal that is formed from plural bit strings and corresponds to a phase; a trigonometric function table that stores first sines and first cosines that respectively correspond to phases expressed by upper bits of the address signals, and second sines and a second cosines that respectively correspond to phases expressed by lower bits of the address signals; a calculation circuit that outputs, as a calculated value, a sine that corresponds to the address signal by calculating processing using the first sine, the first cosine, the second sine and the second cosine that correspond to the address signal and have been extracted by referring to the trigonometric function table; and a correcting section that corrects the calculated value on the basis of a correction value corresponding to the address signal.

Abstract: A battery monitoring system includes a plurality of battery monitoring devices connected in series, such that each battery monitoring device is in communication with at least one adjacent battery monitoring device, and each battery monitoring device monitors battery cells. First and second interface devices are located along first and second communication paths including the battery monitoring devices. A controller controls the first and second interface devices to switch transmission modes between transmitting along the first communication path via the first interface device and the battery monitoring devices, transmitting along the second communication path via the second interface device and the battery monitoring devices, and transmitting along a third transmission mode in which a direction of the communication signals outputted from the first interface device and the second interface device to the plurality of battery monitoring devices are reversed.

Abstract: A lead-free piezoelectric ceramic composition including an alkali niobate/tantalate perovskite oxide main phase having piezoelectric properties and a different metal oxide. The mole ratio (Na/K) between Na (sodium) and K (potassium) in the main phase is 0.40<(Na/K)<3.0. The main phase has a crystal structure in which (i) first spots corresponding to a primitive lattice period and (ii) second spots corresponding to the lattice period two times the primitive lattice period and being weaker than the first spots appear in an electron beam diffraction image entering from the <100> direction with the main phase represented as a pseudo-cubic crystal system. Also, the area ratio of a crystal phase reflecting the second spots in the main phase is 33% or less, and the maximum grain size of crystals reflecting the second spots in the main phase is 25 nm or less.

Abstract: A lead-free piezoelectric ceramic composition including an alkali niobate/tantalate perovskite oxide main phase having piezoelectric properties and a different metal oxide subphase. The mole ratio (Na/K) between Na (sodium) and K (potassium) in the main phase assumes a value in a range represented by 0.40<(Na/K)<3.0. The main phase has a crystal structure in which (i) first spots corresponding to a primitive lattice period and (ii) second spots corresponding to the lattice period two times the primitive lattice period and being weaker than the first spots appear in an electron beam diffraction image entering from the <100> direction with the main phase represented as a pseudo-cubic crystal system.

Abstract: A semiconductor device includes a serial resistance element section including plural resistance elements connected in series, each resistance element provided so as to correspond to one of a plural battery cells connected in series; a comparison section that compares a voltage of a connection point of the plural battery cells connected in series to a voltage of a connection point between the resistance elements that correspond to the battery cells; and a measurement section that measures a voltage of one of the plural battery cells.

Abstract: A battery monitoring system includes a plurality of battery monitoring devices connected in series, such that each battery monitoring device is in communication with at least one adjacent battery monitoring device, and each battery monitoring device monitors battery cells. First and second interface devices are located along first and second communication paths including the battery monitoring devices. A controller controls the first and second interface devices to switch transmission modes between transmitting along the first communication path via the first interface device and the battery monitoring devices, transmitting along the second communication path via the second interface device and the battery monitoring devices, and transmitting along a third transmission mode in which a direction of the communication signals outputted from the first interface device and the second interface device to the plurality of battery monitoring devices are reversed.

Abstract: A lead-free piezoelectric ceramic composition includes a first crystal phase made of an alkali niobate/tantalate type perovskite oxide having piezoelectric properties, and a second crystal phase made of an M-Ti—O spinel compound (where the element M is a monovalent to quadrivalent element).

Abstract: A lead-free piezo-electric porcelain composition which contains a main phase having voids and which is formed of a first crystal phase composed of an alkali niobate/tantalate-based perovskite oxide having piezo-electric characteristics; and a sub-phase containing a second crystal phase composed of an A2B6O13-based compound (where the element A is a monovalent element and the element B is one or more divalent to hexavalent elements). The sub-phase fills voids present in the main phase.

Abstract: A lead-free piezoelectric ceramic composition mainly includes a first crystal phase (KNN phase) and a second crystal phase (NTK phase). In the first crystal phase (KNN phase), a plurality of crystal grains formed of an alkali niobate/tantalate perovskite oxide having piezoelectric characteristics is bound to each other in a deposited state. The second crystal phase (NTK phase) is formed of a compound containing titanium (Ti) and fills spaces between the crystal grains in the first crystal phase.

Abstract: A lead-free piezoelectric ceramic composition including an alkali niobate/tantalate perovskite oxide main phase having piezoelectric properties and a different metal oxide subphase. The mole ratio (Na/K) between Na (sodium) and K (potassium) in the main phase assumes a value in a range represented by 0.40<(Na/K)<3.0. The main phase has a crystal structure in which (i) first spots corresponding to a primitive lattice period and (ii) second spots corresponding to the lattice period two times the primitive lattice period and being weaker than the first spots appear in an electron beam diffraction image entering from the <100> direction with the main phase represented as a pseudo-cubic crystal system.

Abstract: A lead-free piezoelectric ceramic composition including an alkali niobate/tantalate perovskite oxide main phase having piezoelectric properties and a different metal oxide. The mole ratio (Na/K) between Na (sodium) and K (potassium) in the main phase is 0.40<(Na/K)<3.0. The main phase has a crystal structure in which (i) first spots corresponding to a primitive lattice period and (ii) second spots corresponding to the lattice period two times the primitive lattice period and being weaker than the first spots appear in an electron beam diffraction image entering from the <100> direction with the main phase represented as a pseudo-cubic crystal system. Also, the area ratio of a crystal phase reflecting the second spots in the main phase is 33% or less, and the maximum grain size of crystals reflecting the second spots in the main phase is 25 nm or less.