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安全完赛崇礼168
Published:
安全完赛2023崇礼168越野赛（DTC百公里组），手表记录水平移动105.0km，累计爬升5458m，ITRA积分+=4。平时有运动基础的话，赛前两天吃好喝好，百公里其实没那么遥不可及。最后很感谢几位带我的大哥大姐，没你们我真很难独立完赛，尤其是很难熬过折磨人的夜晚，没来得及全部合影还有点遗憾。
简单了解Linux系统中的软链接与硬链接
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在Linux系统中进行工作时，常常遇到软链接与硬链接，它们的区别是什么呢？
恩尼格码密码机如何工作？
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恩尼格码机器底层工作原理是字母替换，明文中的每个字母都会被恩尼格码密码机替换成另一个字母。
ThinkpadT480s内存升级到异构双通道40GB
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大二学生，信息安全专业，平时用电脑比较多。这台ThinkpadT480s原来的内存配置是板载8GB+插槽8GB，共16GB，双通道DDR4-2400，处理器是intel i7-8650u。经常用到Chrome浏览器，VM虚拟机，WSL子系统，ABBYY Finereader，VSCode和VS等软件，内存占用轻松来到85%+，也常常接近100%，故下单镁光32GB-DDR4-2666MHz笔记本内存条，给机器做一次内存升级。
My Opinion to Level of Cognition
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关于认知境界，记不清在哪一本书中有提到，可分为四种。我还不太能“达”地翻译成中文，不作翻译也无妨：
books
Mastery of Object-Oriented Programming from C to C++ (Part)
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Download here
projects
LLM Security Vulnerability Assessment System
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research
talks
Tutorial of C Programming Language: Before Fall 2020 Final Exam
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This tutorial aims to elucidate commonly misunderstood aspects of fundamental C programming concepts, with the objective of enabling the audience to attain a superior performance on their final assessment of 2020 fall. The content of this tutorial is based on my favourite C programming book - ‘The Drops of C Programming Language‘(ISBN: 9787115321985) by Yan Zhao, which is a highly recommended read for beginners in C programming.
Tutorial of C Programming Language: Before Fall 2021 Final Exam
Published:
This tutorial aims to elucidate commonly misunderstood aspects of fundamental C programming concepts, with the objective of enabling the audience to attain a superior performance on their final assessment of 2021 fall. The content of this tutorial is based on my favourite C programming book - ‘The Drops of C Programming Language‘(ISBN: 9787115321985) by Yan Zhao, which is a highly recommended read for beginners in C programming.
A Simple Introduction to Spectrum Map
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This presentation is a simple introduction to spectrum map, which is a way to represent images based on spatial frequencies of grey value or colour variations over the image plane. The presentation explains the concepts of Fourier series and Fourier transform, which are used to convert spatial functions into spatial spectra, and shows some examples of amplitude and phase spectra of different images. The presentation also demonstrates how different frequency components affect the image reconstruction and quality. The presentation aims to help the audience understand the basics of spatial spectrum and its applications in digital image processing.
An Overview of Image Steganography
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This presentation gives an overview of image steganography, a technique for hiding information in images. It introduces the trend of combining machine learning and image processing, and some applications of digital image processing such as face recognition, iris recognition, and activity recognition. It then reviews some existing methods for information hiding in images, such as digital watermarking, visual cryptography, and LSB replacement. It also proposes a novel system that combines cryptography and image steganography for secure data transmission. The system consists of four phases: encryption using AES algorithm, embedding using LSB replacement, hiding using Kekre’s median codebook generation algorithm, and stitching using K-nearest neighbor algorithm. The presentation concludes by highlighting the advantages and potential applications of the proposed system in fields such as banking, consultancies, and detective agencies.
Tutorial of C Programming Language: Before Fall 2022 Final Exam
Published:
This tutorial aims to elucidate commonly misunderstood aspects of fundamental C programming concepts, with the objective of enabling the audience to attain a superior performance on their final assessment of 2022 fall. The content of this tutorial is based on my favourite C programming book - ‘The Drops of C Programming Language‘(ISBN: 9787115321985) by Yan Zhao, which is a highly recommended read for beginners in C programming.
Hyper-Realistic MetaHuman - The Bridge to the Metaverse in Web 3.0
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This talk focus on the generation of metahuman prototype - 3D reconstruction based on Alicevision(A photogrammetric computer vision framework by C/C++), Meshroom(A GUI-based 3D reconstruction software by using Alicevision framework) and meshroom_CLI(An open-source repository to control the phtogrammetry software Meshroom without its GUI using Python script).
Dive Into QAR Stream Data - A Real-time Early Warning Mechanism
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This is a research report on real-time flight safety early warning using QAR stream data. QAR is a quick access recorder that records various sensor data of the aircraft. The authors propose a data washing method, a data acquisition method, and a random forest classification model to predict potential over-limit events during the flight. The authors also present a real-world heavy landing case, analyzing the causes and effects of the over-limit event. The authors finally discuss the future work directions and contribution summary.
teaching
Teaching experience 1
Undergraduate course, University 1, Department, 2014
This is a description of a teaching experience. You can use markdown like any other post.
Teaching experience 2
Workshop, University 1, Department, 2015
This is a description of a teaching experience. You can use markdown like any other post.