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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Liouville Properties on gradient shrinking Ricci solitons with constant scalar curvature
常标量 曲率梯度收缩 Ricci孤子 Liouville性质
2023/11/13
In this talk we show that bounded harmonic functions are constant on gradient shrinking Ricci solitons with CSC by frequency function method. As an application, we show that the space of harmonic func...
High carbon dioxide can create 'shrinking stems' in marshes（图）
High carbon dioxide shrinking stems marshes
2019/10/18
For most plants, carbon dioxide acts like a steroid: the more they take in, the bigger they get. But in a new study, scientists at the Smithsonian Environmental Research Center, Villanova University a...
The Giant Panda's Habitat Is Shrinking And Becoming More Fragmented（图）
Giant Panda Habitat Shrinking More Fragmented
2017/10/24
A study by Chinese and U.S. scientists finds that while populations of the iconic giant panda have increased recently, the species’ habitat still covers less area and is more fragmented than when it w...
Colorado River Flows to Keep Shrinking as Climate Warms
Colorado River Flows Keep Shrinking Climate Warms
2017/3/14
Warming in the 21st century reduced Colorado River flows by at least 0.5 million acre-feet, about the amount of water used by 2 million people for one year, according to new research from the Uni...
Climate Change:Greenland Melting Tied to Shrinking Arctic Sea Ice
Climate Change Greenland Melting Shrinking Arctic Sea Ice
2016/4/13
Vanishing Arctic sea ice. Dogged weather systems over Greenland. Far-flung surface ice melting on the massive island.These dramatic trends and global sea-level rise are linked, according to a study co...
Down the Rabbit Hole: Revisiting the Shrinking Method
impossible differentials block cipher shrinking
2016/1/26
The paper is about methodology to detect and demonstrate
impossible differentials in a block cipher. We were inspired by the shrinking
technique proposed by Biham et al. [2,3] in 1999 which recovere...
Shrinking Trees
Shrinking Trees
2015/8/21
Tree-based models provide an alternative to linear models for classification and regression data. They are used primarily for exploratory analysis of complex data or as a diagnostic tool following a l...
ON LOCALLY CONFORMALLY FLAT GRADIENT SHRINKING RICCI SOLITONS
SHRINKING RICCI SOLITONS CONFORMALLY FLAT
2015/8/17
In this paper, we first apply an integral identity on Ricci solitons to prove that
closed locally conformally flat gradient Ricci solitons are of constant sectional curvature.
We then ge...
Compact Gradient Shrinking Ricci Solitons with Positive Curvature Operator
Positive Curvature Operator Shrinking Ricci Solitons
2015/8/17
In this paper, we first derive several identities on a compact shrinking Ricci
soliton. We then show that a compact gradient shrinking soliton must be
Einstein, if it admits a Riemannian metri...
Shrinking-horizon dynamic programming
dynamic programming model predictive control revenue management
2015/8/7
We describe a heuristic control policy, for a general finite-horizon stochastic control problem, that can be used when the current process disturbance is not conditionally independent of previous dist...
Shrinking-Horizon Dynamic Programming
dynamic programming model predictive control revenue management
2015/7/9
We describe a heuristic control policy, for a general finite-horizon stochastic control problem, that can be used when the current process disturbance is not conditionally independent of previous dist...
Shrinking habitats have adverse effects on world ecosystems--and ultimately people
Shrinking habitats have adverse world ecosystems ultimately people
2015/3/25
An extensive study of global habitat fragmentation--the division of habitats into smaller and more isolated patches--points to major trouble for the world's ecosystems.The study shows that 70 percent ...
Expanding services in a shrinking economy: desktop document delivery in a dental school library
Document Delivery Health Sciences Libraries Library services Library services assessment
2014/11/6
Abstract Question: How can library staff develop and promote a document delivery service and then expand the service to a wide audience? Setting: The setting is the library at the Indiana University S...
Shrinking Targets for Countable Markov Maps
Countable Markov Maps Shrinking Targets Dynamical Systems
2011/9/20
Abstract: Let $T$ be an expanding Markov map with a countable number of inverse branches and a repeller $\Lambda$ contained within the unit interval. Given $\alpha \in \R_+$ we consider the set of poi...
Application of Multi-Step Differential Transform Method on Flow of a Second-Grade Fluid over a Stretching or Shrinking Sheet
Non-Newtonian Fluid Stretching Surface Shrinking Sheet Multi-Step Differential Transform Method (MDTM)
2013/1/30
In this study, a reliable algorithm to develop approximate solutions for the problem of fluid flow over a stretching or shrinking sheet is proposed. It is depicted that the differential transform meth...