487 research outputs found
Products and connected sums of spheres as monotone Lagrangian submanifolds
We obtain new restrictions on Maslov classes of monotone Lagrangian
submanifolds of . We also construct families of new examples of
monotone Lagrangian submanifolds, which show that the restrictions on Maslov
classes are sharp in certain cases.Comment: 18 pages, clarified and simplified. arXiv admin note: text overlap
with arXiv:1812.0500
Discrete Distribution Estimation under User-level Local Differential Privacy
We study discrete distribution estimation under user-level local differential
privacy (LDP). In user-level -LDP, each user has samples
and the privacy of all samples must be preserved simultaneously. We resolve
the following dilemma: While on the one hand having more samples per user
should provide more information about the underlying distribution, on the other
hand, guaranteeing the privacy of all samples should make the estimation
task more difficult. We obtain tight bounds for this problem under almost all
parameter regimes. Perhaps surprisingly, we show that in suitable parameter
regimes, having samples per user is equivalent to having times more
users, each with only one sample. Our results demonstrate interesting phase
transitions for and the privacy parameter in the estimation
risk. Finally, connecting with recent results on shuffled DP, we show that
combined with random shuffling, our algorithm leads to optimal error guarantees
(up to logarithmic factors) under the central model of user-level DP in certain
parameter regimes. We provide several simulations to verify our theoretical
findings.Comment: 26 pages, 4 figure
Solving the Problem of Silicon Dioxide Melting Based on Deviation Model
In order to reveal the dissolution behavior of iron tailings in blast furnace slag, we studied the main component of silica in iron tailings. First, edge contour features need to be established to represent the melting process of silica. We choose shape, perimeter, area and generalized radius as objects. By independently analyzing the influence of these four indexes on the melting rate, the area and shape were selected as the characteristic parameters of the edge contour of the silica particles. Then, the actual melting rate of the silica is estimated by the edge contour feature index. Finally, we can calculate the melting rate of the first second of three time periods of 0.00010312mm3/s, 0.0002399mm3/s, 0.0000538mm3/s
Best Determined Position of Vents Based on Jet Cooling Model
In some data centers, cold air is required to act on the cabinet to achieve cooling requirements, and the mixing of cold air and hot air reduces the utilization efficiency of cold air. In order to solve this problem, a jet cooling model is established to solve the optimal position of the outlet through the movement of cold air
Augmentation varieties and disk potentials II
This is the second in a sequence of papers in which we construct
Chekanov-Eliashberg algebras for Legendrians in circle-fibered contact
manifolds and study the associated augmentation varieties. In this part, we
first define the Chekanov-Eliashberg algebra and its Legendrian contact
homology. For a tame Lagrangian cobordism between Legendrians, we define a
chain map between their Chekanov-Eliashberg algebras.Comment: 52 pages; The original manuscript arXiv:2310.17821v1 was split into
three parts: this being part I
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