博士毕业生代表张佳伟在港中大（深圳）第六届研究生毕业典礼上的发言

CUHK- Shenzhen

香港中文大学（深圳）

第六届研究生毕业典礼

11月6日上午，700余名2021届研究生毕业生身穿毕业袍参加香港中文大学（深圳）第六届研究生毕业典礼。

身在美国麻省理工学院从事博士后研究的张佳伟是理工学院计算机与信息工程博士项目的毕业生，来自逸夫书院。在毕业典礼上，张佳伟作为博士毕业生代表通过视频发言。

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观看博士毕业生代表张佳伟的演讲

尊敬的徐扬生校长，罗智泉教授，亲爱的老师们，同学们，亲爱的家人，以及此时此刻正在收看直播的社会各界朋友们，大家上午好！

我是香港中文大学（深圳）2021届理工学院计算机与信息工程博士生张佳伟。此刻，我已身处麻省理工学院的校园，开启博士后的科研工作。今天，我非常高兴通过多年不懈的努力获得了博士学位，也非常荣幸能成为博士毕业生代表，在今天向多年来陪伴我们成长成才的师长们表示谢意。

在港中大（深圳）这五年，我过得非常开心、充实。这里有一流的软硬件设施，有学术造诣很高却又平易近人的教授们，有热心负责的工作人员，有一群志同道合的好朋友。

作为一个博士生，我想重点聊聊我的学术科研体验。我们学校有丰富的学术资源和很好的学术氛围，在这里我们可以自由地探索科学技术。我们学校开设了诸如大数据、机器人、通信、新能源、智能医疗、区块链等时下非常热门的研究方向，也开设了数学、物理、化学、生物等基础学科。港中大（深圳）很重视交叉学科，强调跨学科的研究和解决实际应用里的基础理论问题。我们在这样的学术氛围中可以自由探索前沿课题，在交叉学科中实现技术创新。

下面聊一下我的研究方向：最优化理论和算法。

“最优化”是应用数学中的经典课题，研究重点是对目标函数进行最大化或最小化。在许多实际应用场景中，如果想要获得成功，就必须先解决“最优化”的问题。例如，有时我们会收集一些数据，对此进行学习，从而预测未知世界。这时候，我们就需要建立一个模型，根据这些数据进行预测。我们通常会使用一些参数来描述这些模型。而找到最佳参数便需要先解决最优化的问题（最小化损失函数）。另外一个典型的例子是资源分配。通常情况之下，我们都希望在有限的资源下获得最高的回报。新冠肺炎疫情期间，医疗资源极其有限。若想做好资源分配，便需要找到一个惠及更多病人的最优化方案。

上述的场景都属于最优化的范畴。而我的研究重点，是寻找高效、稳定的算法去解决重要的最优化问题，以及对一些有趣的最优化问题进行结构化分析。

我们的论文成果已经发表在若干顶级期刊和顶级会议上，如美国工业与应用数学学会的最优化期刊《SIOPT》，电气与电子工程师协会信号处理汇刊《IEEE TSP》以及神经信息处理系统大会(NeurIPS)。

作为一名博士生，我喜欢思考数学问题，喜欢突破人类知识的界限，深入探究问题的本质。我也喜欢寻找新颖而有用的方法来解决重要问题。正因如此，我拥有了做研究的动力和兴趣。在强烈兴趣的驱使下，我得以将研究融入我的日常生活之中，比如我喜欢在走路、等人、乘车和洗澡的时候思考数学问题。这样做不仅能够充分利用时间，还能给我带来许多灵感和启发。

在港中大（深圳），我很荣幸在罗智泉教授的指导下读博士，罗老师对我们学术要求很严格，非常认真负责地去帮助我们提高科研能力，我从他身上学到了很多，我逐渐掌握了如何去寻找去判断有价值的学术问题，如何去利用和创造数学工具解决困难的问题，也逐渐提高了进行学术交流、展示自己研究成果的能力。我们这里还有很多很优秀的老师和同学们，和他们讨论学术问题也让我受益匪浅，我也有几个科研成果就是来源于和其他老师同学的交流中获得的灵感。

感谢港中大（深圳）给予我人生发展中最重要的一个平台，我得以在美国麻省理工学院信息与决策系统实验室进行博士后研究，以后计划在大学或者研究所继续进行科学研究，希望自己可向罗老师看齐，成为一个优秀的学者，我将继续努力，去做出更多有价值的研究，在学术领域为中国、为世界做出贡献。

希望学弟学妹们明确自己的目标，排除干扰，坚持自己热爱的事业，在港中大（深圳）实现自己的价值。

最后，感谢大学给了我一个可以自由探索的平台，感谢罗老师以及大学每一位老师的培养，感谢同学们对我的帮助和支持，感谢我的家人一直以来对我的理解和无私的付出和照顾。我走到今天离不开大家的支持，谢谢！

“深爱人才，圳等你来。”各位同学，今天我们毕业了，不知何时何地才会再相聚。但正如徐扬生校长送别我们的那句话“哪怕整个世界都黑暗下来，总有一盏灯为我们在龙岗亮着。” 无论我们在哪里，港中大（深圳）毕业生的身份都将激励我们不断前行。师长和亲朋的鼓励会一直陪伴我们走向人生的下一段美好时光。

谢谢大家！再次祝各位同学前程似锦！

Ph.D. Graduate Representative'sSpeech

atCUHK-Shenzhen The Sixth Graduation Ceremony

for Postgraduate Students

Zhang Jiaweideliversaspeech

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Distinguished President Xu Yansheng, Professor Luo Zhiquan, dear faculty, students, family members and friends from all walks of life, Good morning!

I am Zhang Jiawei, a Class-of-2021 Ph.D. student in Computer and Information Engineering at the School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen. At this moment, I am on the campus of the Massachusetts Institute of Technology (MIT), starting my post-doctoral research work. I am delighted to have earned my Ph.D. through years of hard work and am honoured to stand here as a representative of Ph.D. graduates to express my gratitude to the faculty and professors who have been with us over the years.

These five years at CUHK-Shenzhen have been immensely enjoyable and fulfilling. The University not only provides first-class hardware and software facilities, but also introduces us to knowledgeable yet approachable professors, enthusiastic and responsible staff, and a group of like-minded friends.

As a Ph.D. student, I would like start with my research experience at this university. CUHK-Shenzhen boasts a wealth of academic resources and an excellent academic atmosphere where one can freely explore science and technology. In addition to fundamental subjects such as mathematics, physics, chemistry and biology, the University also taps into the highly sought-after research areas such as big data, robotics, communications, new energy, smart medicine and blockchain. With an emphasis on interdisciplinary research, the University encourages solutions to fundamental theoretical problems in practical applications. As a result, we are empowered to seek out technological innovation across disciplines and contribute to cutting-edge research topics.

Next, I would like to talk about my research interests: optimization theory and algorithms.

My research interest includes optimization theory and algorithms. Optimization is a classical field in applied mathematics. The main focus of optimization is to maximize or to minimize a function. Solving an optimization problem is a fundamental problem in many practical applications. For example, sometimes we have collected some data and we want to learn from the data to do prediction on the unknown world. Then we need build a model to predict based on this data. The models are usually described by some parameters and finding the optimal parameters requires to solve an optimization problem (minimizing a loss function). Another example is the so-called resource allocation. Usually we need to allocate limited resource to attain highest reward. For example, during the COVID-19 pandemic, the medical resource is limited and we need to learn a scheme to treat more patients.

These interesting problems are all optimization problems. My research focuses on finding efficient, stable algorithms for solving some important optimization problems and analyse the structures of some interesting optimization problems.

Our papers have been published in top journals and top conferences such as SIAM Journal on Optimization (SIOPT), IEEE Transactions on Signal Processing (IEEE TSP) and Conference on Neural Information Processing Systems (NeurIPS) .

As a Ph.D. student, I enjoy thinking about mathematic problems. I enjoy breaking through the boundary of the human knowledge and going deep to the essence of problems. I also enjoy finding new and good methods to solve important problems. These give me continuous motivation and interests to do research. With such strong interests, I can integrate my research into my life. I enjoy thinking about maths problems when I am walking, waiting for someone, taking a car and taking a shower. This helps me fully utilize the time and give me many inspirations.

I am honoured to have been supervised by Professor Luo Zhiquan during my Ph.D. studies at CUHK-Shenzhen. Professor Luo was very strict with us academically and took great care to help us improve our research skills. I have learnt a lot from him, including how to identify valuable research topics, how to use and create mathematical tools to solve difficult problems, and how to communicate and present my research. I am, of course, indebted to a long list of excellent teachers and students at the University. Some of my research findings have also been inspired by my interactions with them.

I would like to thank the University for giving me one of the most important platforms in my life, which has enabled me to conduct post-doctoral research in the LaboratoryforInformation and Decision Systems, Massachusetts Institute of Technology. In the future, I plan to pursue a career in scientific research at a university or research institution, and I wish to become an outstanding scholar on a par with Professor Luo. I will keep working hard to produce more valuable research and make contributions to China and the world in the academic field.

My fellow students, I hope that all of you will be able to clarify your goals and then, regardless of obstacles, stick to what you love and realise your values at CUHK-Shenzhen.

To conclude, I would like to thank the University once again for giving me a platform to explore freely, to thank Prof. Luo and every teacher at the University for their nurturing, to thank my fellow students for their help and support, and to thank my family for their constant love, understanding and selfless dedication. I could not have come this far without everyone's support. Thank you from the bottom of my heart!

Shenzhen is a place that embraces every talent.

Dear graduates, I don't know when and where we will meet again after today's farewell. But as President Xu Yangsheng said in his farewell speech, "Even if the whole world goes dark, there is always a light on for us in Longgang." Wherever we are, our identities as CUHK-Shenzhen graduates will remain, motivating us to keep moving forward. And on the way forward, the blessings and encouragement of our teachers, family and friends will always be with us.

Thank you all, and wish all of us the best future.

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校长徐扬生教授在毕业典礼上的讲话

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PresidentXu Yangsheng's speechatthe Graduation Ceremony

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