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为解决多种天气与多种场景下主干道路行驶车辆检测存在的实时性、泛化能力差、漏检、定位不准确等问题,研究了基于TensorFlow深度学习框架的区域卷积神经网络(FasterR-CNN)算法,通过引入VGG16神经网络模型,优化ROIPoolingLayer,并采用联合训练方法,得到改进的算法模型。采用UA_CAR数据集进行模型训练〖BFQ〗,实现行驶中的车辆检测,测试结果与优化前FasterR-CN...
流动聚焦型微流控装置能够方便、高效地生成均一度好且大小精确可调的微液滴(气泡),故被广泛应用于颗粒材料合成、药物封装、细胞培养等诸多领域. 进一步优化通道结构有助于实现对合成微粒粒径、均一度和尺寸范围的精确调控. 本文数值研究了通道深度、缩颈段长度以及两相夹角等几何构型因素对流动聚焦生成微液滴直径及其生成周期各个阶段的影响. 控制液滴生成方式为滴流式,发现液滴直径随通道深度d 的增加近似呈线性增大...
Orthogonal array based-Latin hypercubes, also called U designs, have popularly been adopted for designing a computer experiment. The relationship between the averaged squared discrepancy of all U desi...
Shannon’s Rate-Distortion Theory describes the number of bits needed to approximately represent typical realizations of a stochastic process X = (X(t) : t ∈ T),while Kolmogorov’s -entropy describes...
We introduce a pathwise algorithm for the Cox proportional hazards model, regularized by convex combinations of `1 and `2 penalties (elastic net). Our algorithm fits via cyclical coordinate descent, a...
We address the problem of sparse selection in linear models. A number of non-convex penalties have been proposed in the literature for this purpose, along with a variety of convex-relaxation algorithm...
We present a general approach to quantifying a mechanism’s susceptibility to strategic manipulation, based on the premise that agents report their preferences truthfully if the potential gain from b...
It is believed that social preference, economic disparity, and heterogeneous environments are mechanisms for segregation. However, it is difficult to unravel the exact role of each mechanism in such a...
The property that the feedback control minimizes some performance index (1.3) with Q ≥ 0 is of considerable interest because of its connection with the ability of the control to reduce the sensitivi...
We present an overview of the essential elements of semidefinite programming as a computational tool for the analysis of systems and control problems. We make particular emphasis on general duality pr...
In this paper we introduce a new method of model reduction for nonlinear systems with inputs and outputs. The method requires only standard matrix computations, and when applied to linear systems resu...
We consider the problem of fitting given data with a convex polynomial. A technique to solve this problem using sum of squares polynomials is presented. This technique is extended to enforce convexity...
In this paper we consider the problem of computing decentralized control policies in a discrete stochastic decision problem. For the problem we consider, computation of optimal decentralized policies ...
We consider a control system in which sensor data is transmitted from the plant to a receiver over a communication channel, and the receiver uses the data to estimate the state of the plant. Using a f...
保险公司需要在可能出现的破产事件之前建立一种适当的预警系统。为优化资本效率,本文提出了保险公司财务预警系统理念并给出了预警时刻定义;针对离散型和连续性损失程度分布,数值模拟了保险公司破产分布密度和预警发出时刻。对不同的初始资本和不同的资本补充方案,计算了多重预警时刻的变动状况,最后提出了预警系统的调整方向以及保险公司资本补充的内部分配原则。本文成果有助于保险公司提高资本效率,构建资金分散化的适当策...

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