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Hong Kong Polytechnic University
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Video
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Year
2022
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Video
【PolyU 85th Anniversary Interview Series】 Dr Sir Gordon Wu Ying-sheung assumed Chairmanship of the PolyU Council in 1997. Under his leadership of over six years, Sir Gordon guided a number of key PolyU campus development projects. He valued the positive impact hostel life brought to students and took part in the design of the PolyU’s first student hostel located in Hung Hom Bay. In this video, you will learn about Sir Wu’s views regarding education and whole person development as well as his wise words for young people.
【理大八十五周年訪談系列】 胡應湘爵士1997年出任理大校董會主席,在任六年領導理大校園多項重要發展,更親自參與理大第一所位於紅磡灣學生宿舍的設計,非常重視宿舍生活對大學生的成長。想知道胡爵士對學生全人教育的看法以及對年輕人的勸勉?立即看片。
- Keywords:
- History Hong Kong Polytechnic University Interviews Education Higher China -- Hong Kong Universities colleges College buildings
- Resource Type:
- Video
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Video
Convex Matrix Optimization (MOP) arises in a wide variety of applications. The last three decades have seen dramatic advances in the theory and practice of matrix optimization because of its extremely powerful modeling capability. In particular, semidefinite programming (SP) and its generalizations have been widely used to model problems in applications such as combinatorial and polynomial optimization, covariance matrix estimation, matrix completion and sensor network localization. The first part of the talk will describe the primal-dual interior-point methods (IPMs) implemented in SDPT3 for solving medium scale SP, followed by inexact IPMs (with linear systems solved by iterative solvers) for large scale SDP and discussions on their inherent limitations. The second part will present algorithmic advances for solving large scale SDP based on the proximal-point or augmented Lagrangian framework In particular, we describe the design and implementation of an augmented Lagrangian based method (called SDPNAL+) for solving SDP problems with large number of linear constraints. The last part of the talk will focus on recent advances on using a combination of local search methods and convex lifting to solve low-rank factorization models of SP problems.
Event date: 11/10/2022
Speaker: Prof. Kim-Chuan Toh (National University of Singapore)
Hosted by: Department of Applied Mathematics
- Subjects:
- Mathematics and Statistics
- Keywords:
- Convex programming Semidefinite programming
- Resource Type:
- Video
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Video
We introduce a Dimension-Reduced Second-Order Method (DRSOM) for convex and nonconvex (unconstrained) optimization. Under a trust-region-like framework, our method preserves the convergence of the second-order method while using only Hessian-vector products in two directions. Moreover; the computational overhead remains comparable to the first-order such as the gradient descent method. We show that the method has a local super-linear convergence and a global convergence rate of 0(∈-3/2) to satisfy the first-order and second-order conditions under a commonly used approximated Hessian assumption. We further show that this assumption can be removed if we perform one step of the Krylov subspace method at the end of the algorithm, which makes DRSOM the first first-order-type algorithm to achieve this complexity bound. The applicability and performance of DRSOM are exhibited by various computational experiments in logistic regression, L2-Lp minimization, sensor network localization, neural network training, and policy optimization in reinforcement learning. For neural networks, our preliminary implementation seems to gain computational advantages in terms of training accuracy and iteration complexity over state-of-the-art first-order methods including SGD and ADAM. For policy optimization, our experiments show that DRSOM compares favorably with popular policy gradient methods in terms of the effectiveness and robustness.
Event date: 19/09/2022
Speaker: Prof. Yinyu Ye (Stanford University)
Hosted by: Department of Applied Mathematics
- Subjects:
- Mathematics and Statistics
- Keywords:
- Convex programming Nonconvex programming Mathematical optimization
- Resource Type:
- Video
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Video
Adaptive computation is of great importance in numerical simulations. The ideas for adaptive computations can be dated back to adaptive finite element methods in 1970s. In this talk, we shall first review some recent development for adaptive methods with some application. Then, we will propose a deep adaptive sampling method for solving PDEs where deep neural networks are utilized to approximate the solutions. In particular, we propose the failure informed PINNs (FI-PINNs), which can adaptively refine the training set with the goal of reducing the failure probability. Compared with the neural network approximation obtained with uniformly distributed collocation points, the proposed algorithms can significantly improve the accuracy, especially for low regularity and high-dimensional problems.
Event date: 18/10/2022
Speaker: Prof. Tao Tang (Beijing Normal University-Hong Kong Baptist University United International College)
Hosted by: Department of Applied Mathematics
- Subjects:
- Mathematics and Statistics
- Keywords:
- Sampling (Statistics) Differential equations Partial -- Numerical solutions Mathematical models Adaptive computing systems
- Resource Type:
- Video
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Video
Before the advent of computers around 1950, optimization centered either on small-dimensional problems solved by looking at zeroes of first derivatives and signs of second derivatives, or on infinite-dimensional problems about curves and surfaces. In both cases, "variations" were employed to understand how a local solution might be characterized. Computers changed the picture by opening the possibility of solving large-scale problems involving inequalities, instead of only equations. Inequalities had to be recognized as important because the decisions to be optimized were constrained by the need to respect many upper or lower bounds on their feasibility. A new kind of mathematical analysis, beyond traditional calculus, had to be developed to address these needs. It built first on appealing to the convexity of sets and functions, but went on to amazingly broad and successful concepts of variational geometry, subgradients, subderivatives, and variational convergence beyond just that. This talk will explain these revolutionary developments and why there were essential.
Event date: 1/11/2022
Speaker: Prof. Terry Rockafellar (University of Washington)
Hosted by: Department of Applied Mathematics
- Subjects:
- Mathematics and Statistics
- Keywords:
- Convex functions Convex sets Mathematical optimization Computer science -- Mathematics
- Resource Type:
- Video
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Video
An online lecture on the topic of "Solar Vehicles for Space".This lecture of “Science World: Exploring Space to Benefit Mankind” Education Programme in the 2021/22 school year for secondary students, which aims to cultivate the interest of local youth in space science and elevate their enthusiasm for participating in the development of space technology.
- Subjects:
- Electrical Engineering
- Keywords:
- Solar energy Space vehicles -- Solar engines
- Resource Type:
- Video
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Video
An online lecture on the topic of "Space Station’s Contribution to Space Resources and Human Developments".This lecture of “Science World: Exploring Space to Benefit Mankind” Education Programme in the 2021/22 school year for secondary students, which aims to cultivate the interest of local youth in space science and elevate their enthusiasm for participating in the development of space technology.
- Subjects:
- Industrial and Systems Engineering and Aeronautical and Aviation Engineering
- Keywords:
- Space stations Exploration of outer space
- Resource Type:
- Video
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Video
Focusing on tensions and links between national formation and international outlooks, this talk shows how classical world visions persist as China’s modernizers and revolutionaries adopted and revised the Western nation-state and cosmopolitanism. The concepts of tianxia (all under heaven) and datong (great harmony) have been updated into outlooks of global harmony that value unity, equality, and reciprocity as strategies of overcoming interstate conflict, national divides, and social fragmentation. The talk will delve into two debates: the embrace of the West vs. aspirations for a common world, and the difference between liberal cosmopolitanism and socialist internationalism.
Event date: 16/9/2022
Speaker: Prof. Ban Wang
Hosted by: Confucius Institute of Hong Kong, Department of Chinese Culture
- Subjects:
- Chinese Studies
- Keywords:
- Diplomatic relations World politics China Civilization
- Resource Type:
- Video
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Video
What is your dream? And how to make it come true? Ms Guo Jingjing, the Olympic Gold Medalist, will share with us her story of chasing dreams.
你的夢想是什麼?你有好好努力使它實現嗎?奧運金牌得主郭晶晶女士將與大家分享她追逐夢想的故事。
Event Date: 22.11.2022
- Keywords:
- China Athletes -- Training of Diving
- Resource Type:
- Video
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Video
An online lecture on the topic of "What is Microgravity? Discovering Interesting Phenomena in Microgravity".This lecture of “Science World: Exploring Space to Benefit Mankind” Education Programme in the 2021/22 school year for secondary students, which aims to cultivate the interest of local youth in space science and elevate their enthusiasm for participating in the development of space technology.
- Subjects:
- Physics and Aeronautical and Aviation Engineering
- Keywords:
- Gravity Reduced gravity environments
- Resource Type:
- Video
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Video
In this CIHK webinar, we will discuss the material conditions of and historical background to the use of Classical Chinese or Literary Sinitic in writing-mediated brush conversation between literati of Sinitic engaged in cross-border communication within Sinographic East Asia or the Sinographic cosmopolis, which corresponds with today’s China, North Korea, South Korea, Japan (including Okinawa, formerly the Ryukyu Kingdom) and Vietnam. Compared with speech as a modality of communication, real-time writing-mediated interaction between talking humans, synchronously face-to-face, seems uncommon. In any society, speaking is premised on one condition: the interlocutors must have at least one shared spoken language at their disposal, but even then, there are circumstances under which speaking is either physically not feasible or socially inappropriate. Could writing function as an alternative modality of communication when speaking is not an option due to the absence of a shared spoken language, as in cross-border communication settings? Whereas real-time writing-mediated face-to-face interaction is rare where a regional lingua franca was known to exist (e.g., Latin and Arabic), there is ample historical evidence of literati of Classical Chinese or Literary Sinitic from different parts of Sinographic East Asia conducting ‘silent conversation’, synchronously and interactively in writing mode using brush, ink, and paper. Such a pattern of writing-assisted interaction is still practiced and observable in pen-assisted conversation – pen-talk – between Chinese and Japanese speakers today, thanks to the pragma-linguistic affordance of morphographic, non-phonographic sinograms (i.e., Chinese characters and Japanese kanji). We will outline the historical spread of Classical Chinese or Sinitic texts from the ‘center’ to the ‘peripheries’, and the historical background to the acquisition of literacy in Sinitic by the people there. Their shared knowledge of Sinitic helps explain why, for well over a thousand years until the 1900s, literati from these places were able to speak their mind by engaging in ‘Sinitic brush-talk’ 漢文筆談 in cross-border communication.
Event date: 13/5/2022
Speaker: Prof. David C. S. Li
Hosted by: Confucius Institute of Hong Kong, Department of Chinese Culture
- Subjects:
- Language and Languages and Chinese Language
- Keywords:
- History China Written communication Chinese characters Chinese language -- Written Chinese East Asia
- Resource Type:
- Video
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Video
中國古典詩歌非常善於運用視覺畫面來進行情感表達。在這個時候,視覺畫面就類似一種鏡頭語言,它不需要對白旁白,就能使觀眾理解作者希望表達什麼。講座將選取經典詩作,分析其中的運鏡和剪輯技巧,以及這些鏡頭語言可以激發的心理效果。
日期:2022年10月28日
講者:于溯博士
主辦:香港孔子學院
- Subjects:
- Chinese Literature
- Keywords:
- Chinese poetry Criticism interpretation etc.
- Resource Type:
- Video
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Video
世界遺產「左江花山岩畫文化景觀」,綿延105公里,其中最大的單幅岩畫有8000平米。這一遺產有八個謎:何人、何時、出於什麼目的,投入如此巨大的人力物力,在懸崖峭壁之上繪製令人震撼的岩畫群?是用什麼顏料繪製千年不褪色?是怎樣畫上去的?為什麼人的圖像都是蛙形?岩畫中有數百面銅鼓,為什麼?為何這一世界遺產叫「文化景觀」?如今在廣西少數民族地區還有哪些岩畫遺風?
日期:2022年10月13日
講者:萬輔彬教授
主辦:香港孔子學院, 中國文化學系
- Subjects:
- Chinese Studies
- Keywords:
- Rock paintings China -- Zuo River Valley
- Resource Type:
- Video
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Video
中國戲曲源自新石器時代的巫術儀式,經歷漢代百戲、唐代戲弄和北宋雜劇,在北宋末融匯了多種形式的演出藝術、民歌、文人曲子及多種演唱文類,發展成戲曲鼻祖「南戲」。粵劇是清代地方劇種百花齊放的產品,既保留着近乎巫術儀式的《祭白虎》,也承傳着崑曲牌子、秦腔梆子、徽劇二黃、宋明南戲和元雜劇的劇目,堪稱中國戲曲的縮影。本講座概述當代香港粵劇的傳承狀況和中國戲曲的歷史面貌,從中探討粵劇如何保留和發展傳統戲曲的元素。講座將論及粵劇神功戲的演出、《祭白虎》儀式、戲班結構、行當、劇目題材、唱腔特點和傳承。
日期:2022年2月16日
講者:陳守仁教授
主辦:香港孔子學院, 中國文化學系
- Subjects:
- Chinese Studies, Hong Kong Studies, and Performing Arts
- Keywords:
- Operas Chinese Theater China China -- Hong Kong
- Resource Type:
- Video
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Video
今天盛行的“科學育兒”話語和“科學母職”家政培訓背後,反映著中國現代化進程與家政工主體之間什麼樣的關係? 本講座從現代化的理論入手,以商業化科學母職培訓為切入點,展現國家和市場如何共同塑造農村打工女性的現代化主體。
日期:2022年11月18日
講者:蘇熠慧博士
主辦:香港孔子學院
- Subjects:
- Chinese Studies
- Keywords:
- China Women
- Resource Type:
- Video
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Video
本演講的出發點是《西廂記》在法國的傳播與接受,從儒蓮、巴贊的戲曲翻譯談起,說明《西廂記》故事如何被十九世紀的歐陸漢學家理解,進而創發出風貌各異的紅娘、鶯鶯與張生等角色類型。本演講也將觸及晚清民初在法國的外交官、留學生,說明他們如何譯介或改編《西廂記》,並與法國文學界激盪出不同模式的文化交流。由此延伸出的議題是熊式一、夏志清等身處英美國家的華人學者,淺析他們如何將《西廂記》置放於知識傳播的脈絡下,讓《西廂記》在二十世紀成為西方讀者認識中國戲曲的重要媒介之一。
日期:2022年3月17日
講者:羅仕龍博士
主辦:香港孔子學院、中國文化學系
- Subjects:
- Chinese Literature
- Keywords:
- Criticism interpretation etc. Chinese fiction
- Resource Type:
- Video
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Video
有關《穆天子傳》周穆王西行地理的研究多矣,然自古未有定論。本研究以顧頡剛的實據地理與神話地理二重結構為理論框架,結合傳世文獻、出土資料與地理實查資料,重探《穆傳》的地理空間。針對有實據之部的地理,本研究強調以當代資料作為地理重構的依據,並發現其主要以戰國早期的晉南及其鄰近地區為核心。針對神話空間,則著重分析其「理性化」的創作思維及其反映的歷史地理脈絡,包含其領土型態、中國觀、世界觀以及交通地理背景。基於上述的歷史地理重構與分析,本研究進一步探討《穆傳》的體裁、國家主體、成書年代、資料依據、作者與讀者以及文本性質,期許對於這部高度爭議的奇書帶來新的認識。
日期:2022年4月8日
講者:雷晉豪博士
主辦:香港孔子學院、中國文化學系
- Subjects:
- Chinese Studies
- Keywords:
- Zhou Dynasty (China) Zhou Muwang Emperor of China active 11th century B.C.-10th century B.C.
- Resource Type:
- Video
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Video
清朝皇族婚入女子的財產權受到法律保障,但是皇族女子的財產權則缺乏法律保障,分產的機會也相對稀少。清朝公主出嫁後對於其陪嫁的人丁、動產與不動產並未擁有完整的所有權,僅擁有占有權、使用權與收益權,而不具備轉讓或出售的處分權,其後代對其亦無繼承權。本文以清代滿洲公主的陪嫁莊頭與壯丁為例,運用清代滿蒙漢文檔案材料和官書典籍,輔以其他二手研究文獻,以出嫁蒙古王公之清朝公主的收支為核心,並聚焦於其妝奩上,探討其財產的所有權、管理機制與公主薨逝後的轉讓情況。最後透過研究公主在崇奉藏傳佛教上的花費,說明清朝公主如何在清朝治理蒙古的政策中起到重要作用。
日期:2022年4月28日
講者:蔡偉傑博士
主辦:香港孔子學院
- Subjects:
- Chinese Studies
- Keywords:
- Princesses China Qing Dynasty (China)
- Resource Type:
- Video
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Video
清末民初由文言到白話的文學語言轉型,對中國女性的“發聲”產生了深遠的影響。本次講座將從晚清白話報的白話書寫、女子教科書的流變、性別觀念的生成三個方面展開,結合不同歷史階段的女子教育和社會風俗,考察詞彙、語法和作文觀念的變遷如何改變了女性表達和國人的性別認知。
日期:2022年4月6日
講者:曹曉華博士
主辦:香港孔子學院、中國文化學系
- Subjects:
- Chinese Literature and Chinese Studies
- Keywords:
- China Women in literature Feminism Women -- Social conditions
- Resource Type:
- Video
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Video
古代中國幅員遼闊,習俗各異,如何實行統一管理是一大難題。秦朝用嚴刑峻法移風易俗,激起東方社會的激烈反抗,很快歸於失敗。西漢初年郡國並行,允許東方王國在一定程度上從俗而治。但王國勢力太大,危及國家的統一,文景二帝不得不收奪諸侯王的自治權。為了避免重蹈亡秦覆轍,儒生們提出“德教”主張,其中又包含“以禮為治”和“以德化民”兩種方案。受其影響,武帝以後的朝廷政策繼續表現出大幅度搖擺,至漢末魏晉才確立了基本符合當時國情的治理模式。
日期:2022年11月22日
講者:陳蘇鎮博士
主辦:香港孔子學院, 中國文化學系
- Subjects:
- Chinese Studies
- Keywords:
- Han Dynasty (China) Politics government Jin Dynasty (China : 265-419) China Public administration Qin Dynasty (China)
- Resource Type:
- Video
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