搜索结果: 1-15 共查到“理学 constrained”相关记录74条 . 查询时间(0.125 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Stochastic approximation methods for nonconvex constrained optimization
非凸 约束优化 随机逼近方法
2023/4/14
Nonconvex constrained optimization (NCO) has been one of the important research fields in optimization community. It has widely appeared in many application fields. However, challenges for solving NCO...
ENDMEMBER EXTRACTION OF HIGHLY MIXED DATA USING L1 SPARSITY-CONSTRAINED MULTILAYER NONNEGATIVE MATRIX FACTORIZATION
Hyperspectral Imagery Nonnegative Matrix Factorization Multilayer Nonnegative Matrix Factorization Sparsity Constraint Endmember Extraction
2018/5/11
Due to the limited spatial resolution of remote hyperspectral sensors, pixels are usually highly mixed in the hyperspectral images. Endmember extraction refers to the process identifying the pure endm...
TARGET TRANSFORMATION CONSTRAINED SPARSE UNMIXING (TTCSU) ALGORITHM FOR RETRIEVING HYDROUS MINERALS ON MARS: APPLICATION TO SOUTHWEST MELAS CHASMA
Prior information Sparse unmixing Hydrous minerals Mars CRISM
2018/5/15
Quantitative analysis of hydrated minerals from hyperspectral remote sensing data is fundamental for understanding Martian geologic process. Because of the difficulties for selecting endmembers from h...
中国地质大学科学技术发展院邓晓东,李建威等资源学院GPMR国家重点实验室 Earth and Planetary Science Letters, 2017. Late Mio-Pliocene chemical weathering of the Yulong porphyry Cu deposit in the eastern Tibetan Plateau constrained by goethite (U–Th)/He dating: Implication for Asian summer monsoon
青藏高原；东缘玉龙；超大型；斑岩
2021/10/21
近日，中国地质大学资源学院和地质过程与矿产资源国家重点实验室李建威团队有关青藏高原东缘玉龙超大型斑岩铜矿床风化壳(U-Th)/He年代学的研究成果发表在地学领域重要综合期刊《Earth and Planetary Science Letters》上。该文第一作者为地质过程与矿产资源国家重点实验室邓晓东研究员，通讯作者为资源学院李建威教授。
ENABLING VIRTUAL-GLOBE BROWSING ON MEMORY-CONSTRAINED PLATFORMS
Virtual globe vector draping terrain rendering memory constraints
2015/9/28
In this paper we investigate techniques for virtual-globe visualization of 2D geospatial data draped on terrain while limiting as much
as possible the amount of data rendered and loaded in random ac...
Constrained ordination analysis with flexible response functions
Canonical correspondence analysis Density estimation Discriminant analysis Likelihood ratio Multinomial and Poisson likelihood Random weights Vegetation succession study
2015/8/21
Canonical correspondence analysis (CCA) is perhaps the most popular multivariate technique used by environmental ecologists for constrained ordination; it is an approximation to the maximum likelihood...
Margin-constrained Random Projections And Very Sparse Random Projections
Random Projections Sampling Maximum Likelihood Asymptotic Analysis
2015/8/21
We propose methods for improving both the accuracy and efficiency of random projections, the popular dimension reduction technique in machine learning and data mining, particularly useful for estimati...
Constrained ordination analysis with flexible response functions
Canonical correspondence analysis Density estimation
2015/8/20
Canonical correspondence analysis (CCA) is perhaps the most popular multivariate technique used by environmental ecologists
for constrained ordination; it is an approximation to the maximum likelihoo...
Convex optimization of output link scheduling and active queue management in QoS constrained packet switches
Algorithm switches generalized geometric programming convex optimization
2015/8/11
We present two novel algorithms at the ingress and egress of packet switches with QoS provisioning and fairness constraints. We first provide a suite of generalized weighted fair queuing formulations ...
An observation-constrained multi-physics WRF ensemble for simulating European mega heat waves
multi-physics WRF ensemble simulating European mega heat waves
2015/8/6
Many climate models have difficulties in properly reproducing climate extremes, such as heat wave conditions. Here we use the Weather Research and Forecasting (WRF) regional climate model with a large...
Efficient Random Assignment with Constrained Rankings
constrained rankings ex-post effi ciency indivisible objects
2015/7/15
We consider the following variant of the random assignment problem: There are
n agents and n indivisible objects to be assigned to them. A mechanism chooses a
lottery over the possible assignments, ...
Nonconservative Robust Control: Optimized and Constrained Sensitivity Functions
optimization methods process control,
2015/7/3
An automated procedure for optimization of proportional–integral–derivative (PID)-type controller parameters
for single-input, single-output (SISO) plants with explicit model
uncertainty is presente...
Nonlinear Contraction Tools for Constrained Optimization
Nonlinear dynamics nonlinear control constrained optimization Lagrange parameters sliding control
2012/6/30
This paper describes new results linking constrained optimization theory and nonlinear contraction analysis. Generalizations of Lagrange parameters are derived based on projecting system dynamics on t...
Linear Programming Relaxations of Quadratically Constrained Quadratic Programs
Quadratic Programming Semidefinite Programming relaxation Linear Programming
2012/6/29
We investigate the use of linear programming tools for solving semidefinite programming relaxations of quadratically constrained quadratic problems. Classes of valid linear inequalities are presented,...
Groundwater Contamination Prediction Using Finite Element Derived Geoelectric Parameters Constrained by Chemical Analysis around a Sewage Site, Southwestern Nigeria
Contamination Finite Element Sewage Groundwater Nigeria
2013/3/7
Vertical Electrical Sounding, the Finite Element Technique (FET) and chemical analysis of soil samples were used to map the pollution plume around two oxidation sewage ponds in Ile-Ife, Southwestern N...