1. Title: The Simulation Platform and Verification of Energy-efficient SSD
Speaker: Yi-jin Guan Advisor: Guang-yu Sun
Our work is to design and make a simulation platform and verification of energy-efficient SSD. The first part is the background of this research, which includes basic knowledge of SSD and existing problems. The next part proposes the idea and framework of the platform, which is the main part of the research. Then the last part shows the verification of the platform and the results of some experiments.
2. Title: Java Bytecode Clone Detection based on Variable Operation Sequence Analysis
Speaker: Zheng Lan Advisor: Ge Li
Over the past several decades, many techniques have been used by researchers and institutes to detect code clone and significant achievements have been gained by the practical tools and implements based on these techniques. However, they have limitations under certain circumstances. Some of them target high speed at the expense of high false positive rate. Others lack the ability to deal with combined clone types.
In this paper, we present the advantages to use Java bytecode to detect code clone, in which field few work has been done. This is achieved because Java bytecode is a more basic language which is much closer towards program semantics and can reveal many runtime features. We will introduce a creative idea to detect code clone using Java bytecode based on variable operation sequences analysis and complex testing sets to make the experiment more reliable. Then we will provide our implements and experiment results to compare our technique with those based on source code and give out analysis on pros and cons. The main contributions of this paper are: (1) a new concept to detect code clone, especially for malicious code clone, and (2) a method that can deal with a neglected field.
3.Title: An Automatic Abnormal Data Elimination Method Towards A Higher Quality Finger Vein Dateset
Speaker: Liao Ni Advisor: Wen-xin Li
In a finger vein dataset collected through PKU sports attendance system, two kinds of images are regarded as abnormal data – one refers to images from one finger but not resemble to each other (class I) and the other includes those from different fingers but looks alike (class II). In this paper, we proposed a method to automatically detect and delete the abnormal data with a reasonable cost to get a higher quality finger vein dataset for the use of further research.
4. Title: Semantic Inversion In XML Keyword Search with General Conditional Random Fields
Speaker: Shuhan Wang Advisor: Zhihong Deng
Keyword search has been widely used in information retrieval sys-tems, such as search engines. However, the input retrieval keywords are so am-biguous that we can hardly know the retrieval intent explicitly. In this project,we clearly define the Semantic Inversion problem in XML keyword search and solve it with General
Conditional Random Fields. Our algorithm concerns different categories of rele-vance and provides the alternative label sequences corresponding to the retrieval
keywords. The results of experiments show that our algorithm is effective and will promote the real search engine.
5.Title: Research on Highway Traffic Performance Index
Speaker: Lu-chen Liu Advisor: Kun-qing Xie
Traffic Performance Index can reflect the performance of highway network directly, which is also important to users and managers. But the most works on traffic index focus on the road network in city, while little work pays attention to highway network. We, considering the density and unevenness of the traffic network, propose a traffic index, based on charge data of Anhui highway. Using these features to cluster small road sections, we get the traffic index clusters in hierarchy.
6.Title: Analysis and Practice on Key Technologies for Unmanned Vehicles.
Speaker: Xiu-han Hu Advisor: Hui-jing Zhao
More than 3000 people died in traffic accidents and driving in a traffic jam is exhausting. Unmanned vehicles are designed to solve the problem. Our group focus on research and experiments concerning unmanned intelligent vehicle technologies, and analyzes the structures and algorithm implementations of some related system. I will introduce the problem and the background, and present the methodology of experiment design and demonstration of results. Such experiments provide a basis answer on how to implement algorithms on a complex hardware system to gather important data and experience.
7. Title: EHEALTH: A Reconfigurable Wireless Healthcare System for OSAS Monitoring
Speaker: Xiao-guang Li Advisor: Tao Wang
Obstructive Sleep Apnea Syndrome (OSAS) is a widespread sleep-disordered breathing disease, which leads to repetitive hypoxemia and interruptions of the normal sleep pattern. Considering its severe negative impact on human health, long-term monitoring of OSAS is necessary. Current OSAS monitoring systems require patients to stay in the hospital overnight and need considerable wiring between human body and the system, which is very inconvenient and expensive. In this work, we propose the system of E-HEALH, a reconfigurable wireless healthcare system for OSAS monitoring. But there’re several great challenges perplex the implementation of E-HEALTH, which includes support the heterogeneity of data from different types of sensors, guarantee for wireless reliability and scalability on cheap hardware. We finally successfully solved the problems with a specifically designed system architecture and related creative implementation from frontend hardware to backend server. In the final implemented system we could support multiple users and each user could use as many as 16 different sensors simultaneously while being able to upload all data wirelessly. And doctors could monitor the health condition of every patient anytime and anywhere with a cross-platform webpage provided by our system.
8. Title: HCMP : A Vision of creative computation in music performance
Speaker: Yue Yan Advisor: Roger B.Dannenberg
Human Computer Music Performance (HCMP) is the integration of computer performance into live popular music. To introduce a computer performer into a real live music performance, we need to propose an integrate solution include the music preparation in computer (how to represent music in computer), music generation and the APIs between each part like an “electronic player” and a “virtual conductor”. The last one is more of a system design and building work, our work is mainly focused on this part, the goal is to well synchronize each part of the system.
9.Title: How natural scenes might shape neural machinery for computing shape from texture
Speaker: Qiaochu Li Advisor: Tai Sing Lee
Our brains are shaped by natural environment during learning and development. To understand how the brain infers 3D surface shape based on texture cues, i.e. solving the shape from texture problem, we study the statistical relationship between the properties of optical images projected on our retina by natural scenes and the 3D structures of the world that give rise to these optical images. We limit our study of the 3D structures to local planes of different slants and tilts. We extract from range data these local planes, and analyzed the corresponding co-registered optical images conditioned on the slant and tilt of the planes. We focused our analysis to spatial frequency gradient of the local image patches, because in principle, this gradient allows accurate estimation of slant and tilt. Our hypothesis is that the spatial frequency gradient information in the optical images can be associated with the underlying 3D shapes during experience.
10. Title: Noise Phenomenon in Nanoscale Electron Devices
Speaker: Mulong Luo Advisor: Ru Huang
In this poster, the random telegraph noise (RTN) in Nanoscale Multi-Gate MOSFETs (MuGFETs) under digital circuit operating conditions is investigated through a new AC characterization method. It has been found that the time constants under AC conditions shows obvious frequency dependence. This phenomenon is carefully modeled and the impact of it on logic circuits is studied. The result shows that this phenomenon will severely impair the robustness of the circuit.
11. Title： Impedence Model of Nanofluidic Crystal and Fabrication of Funnel-Shaped Nanochannels
Speaker: Hong-tan Du Advisor: Wei Wang
Nanofluidics has a unique property that ionic conductance across a nanometer-sized confined space is strongly affected by the space surface charge density, which can be utilized to construct electrical read-out biosensor. In this report, we focused on nanofluidic crystal, which is a 3-dimensional network of nanometer-sized interstices formed by assembling nanoparticles with designed aptamer onside in a suspended micropore or microchannel. We studied both macroscopic and microscopic electrical properties of nanofluidic crystal, and developed a set of fabrication process for funnel-shaped nanochannels. Based on previous work and literature about the geometric model of nanofluidic crystal, we completed the impedance model and equivalent curved channel for nanofluidic crystal. Then we obtained the positive expression that corelates measured conductance of nanofluidic crystal with the equivalent surface charge density on nanoparticles. To verity the model, we applied it to protein detection and lead ion detection experiments. In fabrication part, high-aspect-ratio channels were achieved by integrating E-beam lithography (EBL) and deep reactive ion etching (DRIE). The testing of two different recipes for Silicon etching showed completely different features according to the different etching mechanism.
12. Title: The Design of Ad hoc Emergency Communication Networks based on Smartphones
Speaker: Hang Zhang Advisor: Lingyang Song
This project is to design a communication system that people can transmit messages in emergency, for example, when natural disaster happens. The system that we designed can support peer-to-peer communication, picture exchange and single-hop text sending. Besides, we have published a paper to research the transmission security in the network. This paper has been accepted by WCSP. Furthermore, a patent has been proposed based on the paper.
13. Title: Super-continuum Generation in Tapered Photonic Crystal Fiber
Speaker: Wei Zhang Advisor: Aimin Wang & Zhigang Zhang
Traditional method for supercontinuum generation requires an amplification stage before injecting ultrashort pulses into a photonic crystal fiber. The amplification stage will not only increase the complexibility of the system, but also introduce a lot of noise. In this presentation, the speaker introduces a new approach to low-power supercontinuum generation (Biconical Tapered Photonic Crystal Fiber) and its applications.
14. Title: a pen-like input device for LCDs
Speaker: Jianbo Yang Advisor: Jiang Chen
We are familiar with common touch screen technology: resitive, capacitive,electromagnetic and infrared screen. Now we would achieve a pen-like input device for LCDs, with the advantage of no covered layer,relatively high precision and cheapness. In use of photoelectric detectors, signal processing circuit, we hide special signal in LCDs and detect them by the pen-like device, and we achieve positioning.