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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Towards Provably Efficient Quantum Algorithms for Nonlinear Dynamics and Large-scale Machine Learning Models
非线性动力学 机器学习模型 高效量子算法
2023/4/13
Nonlinear dynamics play a prominent role in many domains and are notoriously difficult to solve. Whereas previous quantum algorithms for general nonlinear equations have been severely limited due to t...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Efficient algorithms for the anisotropic dendritic crystal models
各向异性 树枝状晶体 有效算法
2023/4/14
We consider numerical approximations of the anisotropic phase-field dendritic crystal growth model. This is a highly complex coupled nonlinear system consisting of the anisotropic Allen-Cahn equation,...
Engineers devise a modular system to produce efficient, scalable aquabots（图）
水上机器人 重复元件 模块化系统 工程师设计
2023/6/19
Underwater structures that can change their shapes dynamically, the way fish do, push through water much more efficiently than conventional rigid hulls. But constructing deformable devices that can ch...
Sparse, small, but diverse neural connections help make perception reliable, efficient（图）
神经连接 丘脑输入 视觉皮层神经元 脑科学
2023/6/5
The brain’s cerebral cortex produces perception based on the sensory information it’s fed through a region called the thalamus.
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：An active contour model with local variance force term and its efficient minimization solver for multi-phase image
局部方差力项 活动轮廓模型 多相图像 最小化求解器
2023/5/8
In this work, we propose an active contour model with a local variance force (LVF) term that can be applied to multi-phase image segmentation problems. With the LVF, the proposed model is very effecti...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：The emissions responsibility accounting of multinational enterprises for an efficient climate policy
跨国企业 排放责任核算 高效气候政策
2023/5/9
The achievement of global warming limits below 2 °C and 1.5 °C requires deeper involvement of nonstate and subnational actors. In this paper, we focus on multinational enterprises (MNEs) and propose a...
Modern computers contain tens of billions of switches, called transistors, that pass electrical signals to process inputs and outputs—serving as the basis for computation.
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：RL-based Trajectory Planning for Efficient Exploration of Spatio-Temporal Fields
RL 高效时空场 探测轨迹 规划
2023/5/17
This talk concerns trajectory planning problems of an autonomous vehicle for field exploration, where the vehicle needs to accumulate sufficient information on a spatio-temporal field and to reach a d...
The accumulation of plastic waste in the oceans, soil, and even in our bodies is one of the major pollution issues of modern times, with over 5 billion tons disposed of so far. Despite major efforts t...
With superconducting diodes, scholars advance work toward ultra-efficient quantum electronic devices（图）
超导二极管 量子电子器件 磁场
2023/6/26
A research team including Brown University faculty and students created a superconducting diode without a magnetic field in multi-layer graphene, a development that could form the basis for future “lo...
In a single day, enough sunlight strikes Earth to power the world for an entire year—that is, if we can find a way to capture that energy cheaply and efficiently. While the cost of solar energy has de...
Wireless charging roads equipped with energy storage systems are promising electric vehicle solutions by virtue of their strong advantages in time saving and reduced pressure on the existing power inf...
A new heat engine with no moving parts is as efficient as a steam turbine（图）
运动部件 新型热机 蒸汽轮机 脱碳电网
2023/6/7
Engineers at MIT and the National Renewable Energy Laboratory (NREL) have designed a heat engine with no moving parts. Their new demonstrations show that it converts heat to electricity with over 40 p...
Photocathodes are materials that emit electrons when illuminated by light, and are vital to the performance of some of the world’s most powerful particle accelerators.