A Versatile Mixed-Signal Pin Approach for Cost-Effective Test of Automotive ICs

Integrated circuits (ICs) intended for increasingly sophisticated automotive applications bring unique test demands. Advanced ICs for applications such as highly integrated automatic braking system (ABS) and airbag controllers combine high voltage digital channels, significant VI demands and precise     

Progress and recent trend in MILD combustion

Moderate or intense low oxygen dilution(MILD)combustion plays a significant role in the mitigation of combustion-generated pollutants and greenhouse gases whilst meeting thermal efficiency needs.However,due to the lack of the fundamental knowledge on this combustion,there is a misconception that MILD combustion should be established by high preheating of the air,which has limited its application.Our research and development on this combustion has been performed for several years. We have found that the requ...     

一种基于图像的非均匀单散射参与介质建模方法

针对非均匀单散射参与介质建模问题,提出一种能够保持密度场空间变化细节的建模方法.使用体数据、吸收和散射系数之比分别描述参与介质空间变化的密度分布及光线在其内部的传输特性,通过构建采集图像像素值与它们之间的表达式,将建模问题转化为非线性数值优化问题,求最优解.为了解决高分辨率体数据下大量体素密度值同时求解带来的时间开销大及数值不稳定问题,提出一种符合采集图像像素值明暗分布规律的密度场体数据初始化算法和一种多分辨率体数据逐步求精优化算法;为了快速计算大量体素密度值梯度,提出一种基于GPU的多体素并行梯度计算算法.实验结果表明,提出的方法能够根据采集图像重构烟模型,并保持其细节信息.     

The next generation models for crops and agro-ecosystems

Growth in population, decrease in arable land area, and change in climate are endangering our food security. Precision agriculture has the potential to increase crop productivity thorough tailored agricultural practices for different growing areas. Many models of crops and agro-ecosystems capable of predicting interaction between plants and environments have been developed for precision agriculture. Currently, there are several representative categories of crop and agro-ecosystem models, including the de Wi...     

数控加工中的二次曲线拟合与最优插补控制算法

本文提出一种基于二次B样条曲线对G01代码的拟合及插补方法,先通过自适应方法选取G01代码所描述的加工轨迹形状特征的各个特征点,再用通过所有特征点的二次B样条曲线拟合待加工路径.由于Timar等人提出的最优速度规划算法对于三次及三次以上的高阶次样条曲线的计算极为复杂,本文提出了一种改进的基于二次B样条曲线的时间最优插补计算方法.最后,将所提出的算法应用到实际的图案加工仿真与实际数控加工中.     

Zero-knowledge proofs of retrievability

Proof of retrievability (POR) is a technique for ensuring the integrity of data in outsourced storage services.In this paper,we address the construction of POR protocol on the standard model of interactive proof systems.We propose the first interactive POR scheme to prevent the fraudulence of prover and the leakage of verified data.We also give full proofs of soundness and zero-knowledge properties by constructing a polynomial-time rewindable knowledge extractor under the computational Diffie-Hellman assump...     

带有迭代学习前馈的快速路无模型自适应入口匝道控制

提出了一种新的带有迭代学习前馈的快速路无模型自适应入口匝道控制算法. 模块化的前馈迭代学习和反馈MFAC控制器设计方案使所设计的控制系统有效地利用了交通流的周期性特征, 提高了控制品质. 严格的数学推导证明了该方法的收敛性. 仿真研究及比较结果验证了所提算法的有效性.     

Image-based modeling of inhomogeneous single-scattering participating media

We propose a method to reconstruct inhomogeneous single-scattering participating media, which could preserve fine high-frequency details of density field.Volumetric data and the ratio of absorption coefficient to scattering coefficient are used to describe the spatial-varying density distribution and optical properties of certain participating media, and a function between the above parameters and captured pixel values is built.Thus the problem of how to find solutions to these parameters is formulated into...     

清华OSEK车用嵌入式实时操作系统设计

OSEK规范是一个汽车电子开放式系统及其接口的软件规范，MPC555是Motorola公司开发的高性能车用微控制器。结合这两者的技术特点，提出了在MPC555硬件平台上实现符合OSEK规范的车用嵌入式实时操作系统的设计思想，介绍了操作系统实现的集成交叉开发环境，详细分析了该操作系统的组成与实现，并对其实时性和存储要求进行了评估。     

HIOKI3280-10型钳形数字万用表电阻测量系统测量不确定度的评定及动态预测

本文首先阐述了对测量系统进行测量不确定度评定的重要意义，通过对HIOKI3289-10型钳形数字万用表电阻的测量不确定度的评定和动态分析，提出并利用了灰色理论的GM(1，1)模型对该测量系统进行动态预测，建立了该测量系统测量不确定度的动态预测模型，并对该预测模型的预测准确度进行了检验，检验结果表明该预测模型能比较准确地预测该测量系统的测量不确定度的变化趋势，为了持续保证测量结果的质量，本文最后给出了几点结论和建议。