Search | Engineering

Subscribe Submit

Home Journals Focus Achievement Fronts About Us 中文版

Resource Type

Journal Article 998

Conference Videos 12

Year

2023 74

2022 82

2021 69

2020 75

2019 53

2018 44

2017 47

2016 43

2015 51

2014 43

2013 39

2012 42

2011 34

2010 46

2009 45

2008 37

2007 34

2006 26

2005 26

2004 20

open ︾

Keywords

model 15

model test 15

numerical simulation 15

mathematical model 14

kinetic model 10

COVID-19 7

uncertainty 7

China 6

Deep learning 6

optimization 6

sensitivity analysis 6

constitutive model 5

Machine learning 4

development model 4

numerical model 4

sustainable development 4

FEM 3

artificial neural network 3

dynamic model 3

open ︾

Search scope:

排序： Display mode:

A Flexible Multi-Layer Map Model Designed for Lane-Level Route Planning in Autonomous Vehicles Article

Kun Jiang, Diange Yang, Chaoran Liu, Tao Zhang, Zhongyang Xiao

Engineering 2019, Volume 5, Issue 2, Pages 305-318 doi: 10.1016/j.eng.2018.11.032

Abstract:

An increasing number of drivers are relying on digital map navigation systems in vehicles or mobilemodel and lane-level route planning.The current limitation of the lane-level map model is not its accuracy but its flexibility; this studyproposes a novel seven-layer map structure, called as Tsinghua map model, which is able to support autonomousIn addition, we model the travel costs allocated for lane-level road networks by analyzing vehicle maneuvers

Keywords： Lane-level Route planning Tsinghua map model Travel cost model

HTML PDF Collect

Multiple input self-organizing-map ResNet model for optimization of petroleum refinery conversion units

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 6, Pages 759-771 doi: 10.1007/s11705-022-2269-5

Abstract: ., multi-input self-organizing-map ResNet (MISR), for modeling refining units comprised of two reactorsThe model is comprised of self-organizing-map and the neural network parts.The self-organizing-map part maps the input data into multiple two-dimensional planes and sends thempredicts more accurately the product yields and properties than the previously introduced self-organizing-mapMoreover, the MISR model has smoother error convergence than the previous model.

Keywords： hydrocracking convolutional neural networks self-organizing map deep learning data-driven optimization

HTML PDF Collect

Tang Jie: Knowledge epidemic Map of Tsinghua University (2020-4-18)

18 Aug 2022

Keywords：抗击疫情

Stochastic pedestrian avoidance for autonomous vehicles using hybrid reinforcement learning Research Article

Huiqian LI, Jin HUANG, Zhong CAO, Diange YANG, Zhihua ZHONG,lihq20@mails.tsinghua.edu.cn,huangjin@tsinghua.edu.cn,caoc15@mails.tsinghua.edu.cn,ydg@tsinghua.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 1, Pages 131-140 doi: 10.1631/FITEE.2200128

Abstract: Ensuring the safety of s is essential and challenging when are involved. Classical avoidance strategies cannot handle uncertainty, and learning-based methods lack performance guarantees. In this paper we propose a (HRL) approach for to safely interact with s behaving uncertainly. The method integrates the rule-based strategy and reinforcement learning strategy. The confidence of both strategies is evaluated using the data recorded in the training process. Then we design an activation function to select the final policy with higher confidence. In this way, we can guarantee that the final policy performance is not worse than that of the rule-based policy. To demonstrate the effectiveness of the proposed method, we validate it in simulation using an accelerated testing technique to generate stochastic s. The results indicate that it increases the success rate for avoidance to 98.8%, compared with 94.4% of the baseline method.

Keywords： Pedestrian Hybrid reinforcement learning Autonomous vehicles Decision-making

HTML PDF Collect

On the applicability of different adhesion models in adhesive particulate flows

Guanqing LIU, Shuiqing LI, Qiang YAO,

Frontiers in Energy 2010, Volume 4, Issue 2, Pages 280-286 doi: 10.1007/s11708-009-0062-5

Abstract: An adhesion map provides quantitative criteria for the appropriate selection of adhesion models applicableIt is found that the choice of general model has limited influence on the structure of a constructedadhesion map.On the contrary, the regime of application for each approximate model is sensitive to the approximationA three-dimensional, more intuitive adhesion map based on physical parameters of particles is also built

Keywords： adhesive contact van der Waals force adhesion model adhesion map DEM

HTML PDF Collect

Optimal CNN-based semantic segmentation model of cutting slope images

Mansheng LIN; Shuai TENG; Gongfa CHEN; Jianbing LV; Zhongyu HAO

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 4, Pages 414-433 doi: 10.1007/s11709-021-0797-6

Abstract: This paper also analyzes the segmentation strategies of the three networks in terms of feature map visualization

Keywords： slope damage image recognition semantic segmentation feature map visualizations

HTML PDF Collect

Study on road network model based on virtual node joint

Zhu Zhuangsheng,Wang Qing,Wan Dejun

Strategic Study of CAE 2009, Volume 11, Issue 8, Pages 83-87

Abstract: style="text-align: justify;">The road network in the real world has been showed by the road network modelIt is the first time that a novel road network model,that is,the road network model based on virtualThe novel model adops virtual node to show multi-road converging area,and the virtual node is an areaThe novel model has better of image the traffic flow on the road network than the old model based onnode joint,and satisfies the demand of the map matching theory better.

Keywords： traffic engineering virtual node road network model map matching transportation planning

HTML PDF Collect

Design and application of new storage systems Editorial

Guangyan ZHANG, Dan FENG, Keqin LI, Zili SHAO, Nong XIAO, Jin XIONG, Weimin ZHENG,gyzh@tsinghua.edu.cnhust.edu.cn,lik@newpaltz.edu,zilishao@cuhk.edu.hk,xiaon6@mail.sysu.edu.cn,xiongjin@ict.ac.cn,zwm-dcs@tsinghua.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 5, Pages 633-636 doi: 10.1631/FITEE.2310000

Abstract: A storage system is the core of a computer, and plays an important role in the sustainable development of emerging strategic industries, such as artificial intelligence, big data, cloud computing, and the Internet of Things. Storage stack access is a major factor restricting the performance of data-intensive systems because of the increasing performance of processors and network devices. Recently, new storage devices have attracted wide attention due to their ability to break the “memory wall.” These devices include block-addressable flash memory, byte-addressable non-volatile random access memory (NVRAM), in-memory computing devices, and large-capacity optical storage. Continuous innovation in algorithms, software designs, and hardware is necessary to build large-scale storage systems with high throughput, low access latency, and high data reliability. It can address challenges in building larger-scale and higher-performance systems with more complex structures. Further, it can boost the experience in building and applying relevant systems and accelerate developing the big data processing.

HTML PDF Collect

A bacterial artificial chromosome-based physical map of

Yuhua FU,Zhiqiang XIA,Shujuan WANG,Xin CHEN,Cheng LU,Mingcheng LUO,Hongbin ZHANG,Wenquan WANG

Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 4, Pages 321-329 doi: 10.15302/J-FASE-2016124

Abstract: A total of 29952 clones were fingerprinted and resulted in a cassava physical map composed of 2485 contigsThis BAC-based physical map provides valuable tools to understand the genetics and evolution of cassava

Keywords： cassava BAC library physical map

HTML PDF Collect

Thoughts and Suggestions on Autonomous Driving Map Policy

Liu Jingnan, Dong Yang, Zhan Jiao, Gao Kefu

Strategic Study of CAE 2019, Volume 21, Issue 3, Pages 92-97 doi: 10.15302/J-SSCAE-2019.03.004

Abstract: style="text-align: justify;">As a key infrastructure to realize autonomous driving, autonomous driving mapCurrently, constrained by laws and regulations related to ground mapping, map application, and supervisiongeographic information expression, qualifications for geographic information collection and the process for mapreview, accident liability and insurance issues, as well as autonomous driving map related test specificationsdevelopment and commercialization of autonomous driving vehicles in China: formulating an autonomous driving map

Keywords： autonomous driving map autonomous driving regulation autonomous driving policy

HTML PDF Collect

& Research Article

Yitian YANG, Youyou LU,yangyiti22@mails.tsinghua.edu.cn,luyouyou@tsinghua.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 5, Pages 675-687 doi: 10.1631/FITEE.2200469

Abstract: Emergence of new hardware, including and , has brought new opportunities to design. In this paper, we design and implement a new named NICFS based on and SmartNIC. We divide the into two parts: the front end and the back end. In the front end, data writes are appended to the in a log-structured way, leveraging the fast persistence advantage of . In the back end, the data in logs are fetched, processed, and patched to files in the background, leveraging the processing capacity of SmartNIC. Evaluation results show that NICFS outperforms Ext4 by about 21%/10% and about 19%/50% on large and small reads/writes, respectively.

Keywords： Non-volatile memory Persistent memory Data processing unit Smart network interface card (SmartNIC) File system

HTML PDF Collect

Map Update in Raster Mode by Means of Aerial and Space Images

Lin Zongjian

Strategic Study of CAE 2000, Volume 2, Issue 4, Pages 43-47

Abstract:

To meet the urgent needs of updating 1：10 000 scale and 1 ：50 000 scale topographic map for the wholeof China, an integrated techinique for key elements revision is proposed, in which the topographic mapraster mode through overlaying the precisely geo-rectified aerial or satellite image on the digitized mapThe following issues are specially presented： 1) The scanning resolution of topographic map digitization

Keywords： surveying and mapping remote sensing map updating digital raster graphic (DRG)

HTML PDF Collect

Grazing incidence polarized light imaging of footwear prints Regular Article

Xin-yi Bi, Rui-fang Han, Ran Liao, Wu-sheng Feng, Da Li, Xue-jie Zhang, Hui Ma,liao.ran@sz.tsinghua.edu.cn

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 11, Pages 1543-1550 doi: 10.1631/FITEE.1800383

Abstract: Footwear prints are important evidence in criminal investigation. They represent changes in the surface morphology due to disturbance to fine distributions. Existing non-contact optical detection methods usually measure the light intensity contrasts between the footwear prints and the ground, which can be enhanced by grazing incident illumination. We take images of footwear prints on different types of floors using a commercial single lens reflex color camera. Results show that adding linear polarizers in front of the camera lens and light source improves the contrast of footwear print images. The best contrasts are achieved in degree of linear . In addition, the three-color channels of the camera can be used to examine the spectral features of the images. According to the experimental results, the best contrast is obtained at the blue channel. The current work shows that grazing incidence polarized light imaging can effectively enhance the contrast of the footwear prints against the floors, which would help obtain footwear evidence in criminal investigation.

Keywords：偏振；图像增强；散射；粒子

HTML PDF Collect

Optimization of process parameters for mature landfill leachate pretreatment using MAP precipitation

Wei LI, Xiaowen DING, Min LIU, Yuewen GUO, Lei LIU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 6, Pages 892-900 doi: 10.1007/s11783-012-0440-9

Abstract: experiments were carried out to determine the optimal conditions enhancing the magnesium ammonium phosphate (MAPThe residues of MAP sediments decomposed by heating under alkaline conditions can be reused as the sourceshigh concentrations of , and up to 90% of ammonium could be released under molar ratio of n[OH]∶n[MAP

Keywords： magnesium ammonium phosphate precipitation mature landfill leachate optimization ammonium-nitrogen

HTML PDF Collect

Optimization of fuel supply map during starting process of electronic controlled diesel engine

LIANG Jinguang, YU Xiumin, GAO Yue, WANG Yunkai, YU Hongyang, Gong Baoli

Frontiers in Energy 2008, Volume 2, Issue 4, Pages 410-415 doi: 10.1007/s11708-008-0080-8

Abstract: Tests were conducted to study influence of fuel supply map during the starting process of an electronicThe calibration process of starting fuel supply map was educed under the principle of low HC emissionThe calibration methods of starting fuel supply map were obtained.

Keywords： supply management CA498Z process controlled distributor

HTML PDF Collect

Title Author Date Type Operation

A Flexible Multi-Layer Map Model Designed for Lane-Level Route Planning in Autonomous Vehicles

Kun Jiang, Diange Yang, Chaoran Liu, Tao Zhang, Zhongyang Xiao

Journal Article

Multiple input self-organizing-map ResNet model for optimization of petroleum refinery conversion units

Journal Article

Tang Jie: Knowledge epidemic Map of Tsinghua University (2020-4-18)

18 Aug 2022

Conference Videos

Stochastic pedestrian avoidance for autonomous vehicles using hybrid reinforcement learning

Huiqian LI, Jin HUANG, Zhong CAO, Diange YANG, Zhihua ZHONG,lihq20@mails.tsinghua.edu.cn,huangjin@tsinghua.edu.cn,caoc15@mails.tsinghua.edu.cn,ydg@tsinghua.edu.cn

Journal Article

On the applicability of different adhesion models in adhesive particulate flows

Guanqing LIU, Shuiqing LI, Qiang YAO,

Journal Article

Optimal CNN-based semantic segmentation model of cutting slope images

Mansheng LIN; Shuai TENG; Gongfa CHEN; Jianbing LV; Zhongyu HAO

Journal Article

Study on road network model based on virtual node joint

Zhu Zhuangsheng,Wang Qing,Wan Dejun

Journal Article

Design and application of new storage systems

Journal Article