Toyota

About: Toyota is a company organization based out in Safenwil, Switzerland. It is known for research contribution in the topics: Internal combustion engine & Battery (electricity). The organization has 40032 authors who have published 55003 publications receiving 735317 citations. The organization is also known as: Toyota Motor Corporation & Toyota Jidosha KK.

The Communication Complexity of Correlation

Abstract: Let X and Y be finite nonempty sets and (X,Y) a pair of random variables taking values in X?Y. We consider communication protocols between two parties, Alice and Bob, for generating X and Y. Alice is provided an x ? X generated according to the distribution of X , and is required to send a message to Bob in order to enable him to generate y ? Y, whose distribution is the same as that of Y|X=x. Both parties have access to a shared random string generated in advance. Let T[X:Y] be the minimum (over all protocols) of the expected number of bits Alice needs to transmit to achieve this. We show that I[X:Y] ? T[X:Y] ? I [X:Y] + 2 log2 (I[X:Y]+ O(1). We also consider the worst case communication required for this problem, where we seek to minimize the average number of bits Alice must transmit for the worst case x ? X. We show that the communication required in this case is related to the capacity C(E) of the channel E, derived from (X,Y) , that maps x ? X to the distribution of Y|X=x. We also show that the required communication T(E) satisfies C(E) ? T(E) ? C (E) + 2 log2 (C(E)+1) + O(1). Using the first result, we derive a direct-sum theorem in communication complexity that substantially improves the previous such result shown by Jain, Radhakrishnan, and Sen [In Proc. 30th International Colloquium of Automata, Languages and Programming (ICALP), ser. Lecture Notes in Computer Science, vol. 2719. 2003, pp. 300-315]. These results are obtained by employing a rejection sampling procedure that relates the relative entropy between two distributions to the communication complexity of generating one distribution from the other.

Device for detecting malfunction of fuel evaporative purge system

Abstract: A device for detecting a malfunction of a fuel evaporative purge system comprises a pressure sensor for detecting gas pressure in a purge passage connecting a canister to an intake pipe, and an intake vacuum sensor for detecting a negative pressure in the intake pipe. In the purging condition, the device determines whether the obtained relationship between the detected negative pressure in the purge passage and the detected intake vacuum is within a predetermined area and judges that a malfunction has occurred in the system when the relationship is not within the predetermined area.

Discharge Performance of All-Solid-State Battery Using a Lithium Superionic Conductor Li10GeP2S12

Abstract: A solid electrolyte, Li10GeP2S12, exhibits a high lithium ionic conductivity of 12mS/cm at room temperature. Because of its high ionic conductivity, high charge-discharge performance would be expected for the all-solid-state batteries using the Li10GeP2S12 electrolytes. In this study, all-solid-state batteries using Li10GeP2S12, were constructed and their battery performances were examined. The batteries using the Li10GeP2S12 electrolyte showed higher discharge capacities than those with glass electrolyte, 75Li2S·25P2S5, particularly under the high-rate current discharge. © The Electrochemical Society of Japan, All rights reserved.