Hidetaka Aoki

Learn More
The next-generation cloud computing systems are expected to be connected to the real world more tightly by massive amounts of sensors and actuators. Today's clouds, however, are not capable of handling massive sensor data or giving fast feedback to the real world because of the long latency and limited bandwidth of WANs. We propose a cloud architecture that(More)
A new computing architecture based on a ground-state search of the Ising model and the probabilistic behavior of a memory cell is proposed. To improve computer performance, a spatial computing architecture that defines an Ising model as the interface between software and hardware is proposed. Various problems can be represented as a spatial parameter in the(More)
Improvements to the performance of conventional computers have mainly been achieved through semiconductor scaling; however, scaling is reaching its limitations. Natural phenomena, such as quantum superposition and stochastic resonance, have been introduced into new computing paradigms to improve performance beyond these limitations. Here, we explain that(More)
Masanao Yamaoka, Ph.D. Chihiro Yoshimura Masato Hayashi Takuya Okuyama Hidetaka Aoki Hiroyuki Mizuno, Ph.D. OVERVIEW: The optimization of social infrastructure systems will be among the requirements of Hitachi’s Social Innovation Business in the future, therefore, there will be a need to solve combinatorial optimization problems. Hitachi has devised a(More)
As one of the core cooling equipment in district cooling system, latest electric chiller can achieve high energy efficiency and low CO<sub>2</sub> emission. In recent years, many researches have been conducted on cooling plant performance evaluation and anomaly detection, but very few can quantitatively detect root causes of electric chiller's performance(More)
We developed an SRAM-based CMOS LSI chip that accelerates ground-state searches of an Ising model. Escaping local minima is a key feature to create such a chip. We describe a novel method to escape the local minima by distributing random pulses asynchronously. The random pulses are input from outside of the chip and propagated through two asynchronous(More)