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北大講座 共29場
2018年12月24日（周一）14:00【主講】Prof. Krishna Kumar（AIPAAS Laboratory, Canada）【地點】北京大學力學樓434室【內容】A spacecraft or swarm of spacecraft represents a highly complex engineering system; they comprise of several subsystems such as attitude and orbit control subsystem, payload subsystem, thermal control system, power subsystem and propulsion subsystem. These systems are multi-input & multi-output (MIMO) systems generally ranging in hundreds of inputs and outputs. In recent years, the complexity of these subsystems has increased more than hundred folds due to high performance requirement and increased autonomous capability. The fault tolerant control, artificial intelligence and predictive analytics can play a significant role in meeting these requirements. Fault Tolerant Control (FTC) has been proposed for developing high performance autonomous spacecraft. The FTC includes fault detection and isolation (FDI), robust control, and reconfigurable control (RC). My talk will discuss on these methods and future challenges to achieve spacecraft autonomy.
2018年12月24日（周一）14:00-15:00【主講】Xinyi Li（University of Chicago, USA）【地點】Room 1418, Sciences Building No. 1, Peking University【內容】In this talk, I will talk about loop-erased random walk (LERW) in three dimensions. I will first give an asymptotic estimate on the probability that 3D LERW passes a given point (commonly referred to as the one-point function). I will then talk about how to apply this estimate to show that 3D LERW as a curve converges to its scaling limit in natural parametrization. If time permits, I will also talk about the asymptotics of non-intersection probabilities of 3D LERW with simple random walk. This is a joint work with Daisuke Shiraishi (Kyoto).
2018年12月24日 15:00-16:00【主講】Xin Sun（Columbia University, USA）【地點】Room 1418, Sciences Building No. 1, Peking University【內容】Random fractals arise naturally as the scaling limit of large discrete models at criticality. These fractals usually exhibit strong self similarity and spacial independence. In this talk, we will explain how these additional properties should give the existence of a natural occupation measure on the fractal set, defined to be the limit of the properly rescaled Lebesgue measure restricted to small neighborhoods of the fractal. Moreover, the occupation measure is also the scaling limit of the normalized counting measure over the corresponding discrete set. In two dimension, when putting an independent Liouville quantum gravity background over such a planar fractal, the quantum version of the occupation measure still exists, where the scaling dimension is related to the Euclidean one via the famous KPZ relation due to Knizhnik- Polyakov-Zamolodchikov and Duplantier-Sheffield. The quantum occupation measure is supposed to be the scaling limit of the normalized counting measure of the corresponding discrete set on certain random planar maps. The picture described above is expected to be true in great generality yet it is only established for a few models to various extents. In this talk, we report a fairly complete picture for planar percolation on the regular and random triangular lattice.
2018年12月24日（周一）15:00【主講】Dr. Zhiyong Sun（孫志勇）（Lund University）【地點】北京大學力學樓434室【內容】In this talk we present some novel distributed event-triggered algorithms for achieving multi-agent consensus with fully Zeno-free triggerings for all the agents. Each agent updates its own control input at its own triggering instants by using local measurements in terms of relative states with respect to neighboring agents, and such local measurements can be done in a local coordinate frame. For all agents, a positive Lp signal function is included in the event detector functions, which ensures a week Zeno-free triggering for all agents. We also show that the proposed event-based consensus algorithms guarantee less triggering events in a bounded time interval compared to the conventional algorithm without Lp signals. The proposed event-based consensus seeking algorithm will be extended to multi-agent systems modelled by general linear dynamics, and networked agents interacting in directed graphs.
2018年12月24日（周一）13:00【主講】Benben Jiang【地點】北京大學王克楨樓805【內容】Lithium-ion batteries have emerged as the key energy storage devices due to their low and falling costs, high energy densities, and long cycle lives. The battery management system (BMS) is in itself an important element to make the utilization of the battery in electric vehicles safe, reliable, and efficient. Recent efforts have designed efficient algorithms for conducting individual tasks of BMS, including optimal charging optimization, state-of-health (degradation) estimation, and battery lifetime prediction. The work on studying these BMS technologies as an integral whole is limited, especially in the context of fast charging, which is crucial for eliminating range anxiety and boosting the adoption of electric vehicles. This talk will provide my recent works on developing an autonomous research system to integrally tackle the key technical challenges of BMS that hinge on data: (1) How to accelerate top-down BMS technology optimization and prediction, for example, by quickly predicting failures and lifetime? (2) How to achieve a bottom-up understanding of the physics, such as the capacity fade mechanisms of a battery, for the rational design of BMS technologies across various purposes?
2018年12月24日（周一）15:00-16:00【主講】Xuhua He (University of Maryland)【地點】Room 77201, Jingchunyuan 78, BICMR, Peking University【內容】In a 1957 paper, Tits explained the analogy between the symmetric group S_n and the general linear group over a finite field F_q and indicated that S_n should be regarded as the general linear group over F_1, the field of one element. Following Tits' philosophy, we would like to regard the affine Weyl groups as the reductive group over Q_1, the 1-adic field. Although it is still premature to develop the theory of 1-adic field at the current stage, we do have a fairly good understanding on the conjugacy classes of the affine Weyl groups, together with the length function on it, and such knowledge allows us to reveal a great part of the structure of the conjugacy classes of p-adic groups. I will explain how this idea may be used in representation theory and in arithmetic geometry.
2018年12月25日（周二） 19:00—21:00【主講】Neysun Mahboubi（馬瑞欣）【地點】北京大學凱原樓303會議室
2018年12月25日（周二）12:00-13:00【主講】Su Yao【地點】KIAA, Peking University
2018年12月25日（周二）10:30-11:30【主講】Chong Wang（McMaster University）【地點】Room 78201, Jingchunyuan 78, BICMR, Peking University【內容】Skin pigmentation, animal coats and block copolymers can be considered as multi-constituent inhibitory systems. Exquisitely structured patterns arise as orderly outcomes of the self-organization principle. Analytically, via the sharp interface model, patterns can be studied as nonlocal geometric variational problems. The free energy functional consists of an interface energy and a long range Coulomb-type interaction energy. The admissible class is a collection of Caccioppoli sets with fixed volumes. To overcome the difficulty that the admissible class is not a Hilbert space, we introduce internal variables. Solving the energy functional for stationary sets is recast as a variational problem on a Hilbert space. We prove the existence of a core-shell assembly and the existence of disc assemblies in ternary systems and also a triple-bubble-like stationary solution in a quaternary system. Numerically, via the diffuse interface model, one open question related to the polarity direction of double bubble assemblies is answered. Moreover, it is shown that the average size of bubbles in a single bubble assembly depends on the sum of the minority constituent volumes and the long range interaction coefficients. One further identifies the ranges for volume fractions and the long range interaction coefficients for double bubble assemblies.
2018年12月25日（周二）15:00【主講】Prof Nguyen T K Thanh（UCL Healthcare Biomagnetic and Nanomaterials Laboratory, Biophysics Group, Department of Physics and Astronomy, University College London, UK）【地點】北京大學綜合科研樓對面一層會議室（137）【內容】Prof Thanh leads a very dynamic group conducting cutting edge interdisciplinary and innovative research on the design, and synthesis of magnetic and plasmonic nanomaterials for biomedical applications. A very strong feature of her research program is the development of new chemical methods and in collaboration with chemical engineers to produce the next generation high magnetic moment nanoparticles and advanced functional nanorods, and novel hybrid and multifunctional nanostructures. Detailed mechanistic studies of their formation by sophisticated and advanced analysis of the nanostructure allows tuning of the physical properties at the nanoscale; these can subsequently be exploited for diagnosis, treatment of various diseases and waster water treatment.
In this presentation, speaker will present the most recent results from their group on synthesis and biofunctionalisation of plasmonic and magnetic nanoparticles for potential biomedical applications in diagnosis and treatment of diseases.
2018年12月25日（周二）14：00-16:00【主講】Henry Tan（University of Aberdeen）【地點】北京大學力學樓434會議室【內容】Based in Aberdeen, the 「Energy Capital of Europe", from our recent research collaborations with the energy industries, and the experience chairing the 1st-9th International Symposium on Energy, this talk explores issues related to energy challenges and mechanics from a global perspective. The aim is to get a complete view of energy-related problems.
2018年12月26日（周三）15:00-16:00【主講】姜玉武【地點】北京大學金光生命科學大樓208會議室
2018年12月26日（周三）10:10-11:30【主講】張冬卉（湖北大學教授）【地點】北京大學英傑交流中心306會議室
2018年12月26日（周三）8:00-9:50【主講】劉俊秋（吉林大學教授）【地點】北京大學二教106教室
2018年12月26日10:00-12:00【主講】Wei Xu (Ohio State University)【地點】北京大學 計算機所大樓 106報告廳【內容】Human language is notoriously complex due to the multitude of ways people can express the same meaning. My research focuses on machine learning methods to understand the seemingly unlimited number of expressions in human language. In this talk, I will present our recent work addressing two aspects of this problem：#1 - 「Neural Network Models for Paraphrase Identification, Semantic Textual Similarity, Natural Language Inference, and Question Answering」. #2 - 「A Word-Complexity Lexicon and A Neural Readability Ranking Model for Lexical Simplification」
2018年12月27日（星期四）13:00-14:00【主講】Xin Liu, Ph.D.（Postdoctoral research fellow, University of Texas Southwestern Medical Center）【地點】北京大學金光生命科學大樓411【內容】Hematopoiesis requires highly coordinated gene expression through transcriptional and post-transcriptional mechanisms. By comparing enhancer landscape, transcriptional factor occupancy, 3D chromatin structure and transcriptomic changes during blood cell differentiation, I identified lineage-specific enhancers and macro-molecular interactions driving enhancer activation, providing initial insights into enhancer dynamics and gene expression programs directing lineage-specific transcription during hematopoiesis. Further comparison between the proteomic and transcriptomic changes in erythroid development uncovered post-transcriptional pathways leading to enhanced mitochondrial biogenesis. Perturbation of mitochondria interrupted intracellular metabolism, leading to altered transcriptional regulation and defective lineage differentiation, which provide a new pathway between mitochondrial biogenesis and epigenetic gene regulation indispensable for normal erythropoiesis.
2018年12月27日（周四）15:00-16:00【主講】Xinran Li（University of Pennsylvania）【地點】Room K02, Guanghua Building 2, Peking University【內容】With many pretreatment covariates and treatment factors, the classical factorial experiment often fails to balance covariates across multiple factorial effects simultaneously. Therefore, it is intuitive to restrict the randomization of the treatment factors to satisfy certain covariate balance criteria, possibly conforming to the tiers of factorial effects and covariates based on their relative importances. This is rerandomization in factorial experiments. We study the asymptotic properties of this experimental design under the randomization inference framework without imposing any distributional or modeling assumptions of the covariates and outcomes. We derive the joint asymptotic sampling distribution of the usual estimators of the factorial effects, and show that it is symmetric, unimodal, and more 「concentrated」 at the true factorial effects under rerandomization than under the classical factorial experiment. We quantify this advantage of rerandomization using the notions of 「central convex unimodality」 and 「peakedness」 of the joint asymptotic sampling distribution. We also construct conservative large-sample confidence sets for the factorial effects.
2018年12月27日（周四）14:00-15:00【主講】Renyu (Philip) Zhang（New York University Shanghai）【地點】Room K02, Guanghua Building 2, Peking University【內容】We study how a recommender system could shape the demand to maximize the number of matches between consumers and producers on a two-sided platform. To improve the long-term performance of a platform, the optimal recommender system design trades off expanding market demand by recommending high-quality producers and reducing congestion by recommending low-quality ones. The traditional recommender system has been focusing on identifying and recommending the producers of highest qualities. Albeit optimal when producers have unlimited capacities, such a recommender system may result in substantial optimality losses in the presence of producer capacity constraints. Such losses are most significant when the demand and supply of the platform is balanced. If, in addition, the quality of a producer improves upon working for the platform, the platform should recommend low-quality producers even more often to improve their qualities. A dynamic re-balancing recommendation policy which maximizes the number of matches myopically converges to an optimal policy in the long-run. We also extend our results to a setting with multiple quality levels and a setting with horizontally heterogeneous consumers and producers. Our results shed light on the optimal recommender system design for a broad range of two-sided platforms.
2018年12月27日（周四）10:00-11:30【主講】Ningzhong Li（University of Texas at Dallas）【地點】Room 217, Guanghua Building 2, Peking University【內容】This paper examines the association between firms』 political connection and their voluntary disclosure on government subsidies using a sample of Chinese non-state-owned enterprises. For the sample period 2007~2016, we find that politically connected subsidy-receiving firms provide a lower amount of subsidy disclosures through annual reports than unconnected ones. This association is mainly driven by connected firms whose subsidies are difficult to justify, is stronger for firms registered in provinces with a higher level of corruption and firm with higher media attention, and becomes weaker following the anti-corruption campaign starting in late 2012. These findings suggest that politically connected subsidy recipients tend to withhold subsidy information to reduce the costs for the politicians they connect to and themselves from the public scrutiny of subsidies granted through relationships. Consistent with this interpretation, we further show that politically connected firms are granted more subsidies and this association is stronger in provinces with a higher level of corruption and becomes weaker following the anti-corruption campaign.
2018年12月27日（周四）12:00-13:00【主講】Weiwei Xu (National Astronomical Observatories, Chinese Academy of Sciences)【地點】first floor meeting room, KIAA, Peking University【內容】Some indications for tension have long been identified between cosmological constraints obtained from galaxy clusters and primary cosmic microwave background (CMB) measurements. Typically, assuming the matter density and fluctuations, as parameterized with Omega_m and sigma_8, estimated from CMB measurements, many more clusters are expected than those actually observed. This has been reinforced recently by the Planck collaboration. One possible explanation could be that certain types of galaxy groups or clusters were missed in samples constructed in previous surveys, resulting in a higher incompleteness than estimated. In this work, we aim to determine if a hypothetical class of very extended, low-surface-brightness galaxy groups or clusters have been missed in previous X-ray cluster surveys based on the ROSAT All-Sky Survey (RASS).We applied a dedicated source-detection algorithm sensitive also to more unusual group or cluster surface-brightness distributions. We found many known groups but also a number of new group candidates, which are not included in any previous X-ray or SZ cluster catalogs. In this talk, I will present a pilot sample of 13 very extended groups discovered in the RASS at positions where no X-ray source has been detected previously and with clear optical counterparts. The X-ray fluxes of at least 5 of these are above the nominal flux-limits of previous RASS cluster catalogs (> 3x10^{-12} erg s^{-1} cm^{-2} in the 0.1-2.4 keV energy band). They have low mass (10^{13} Msun We demonstrate that galaxy groups were missed in previous RASS surveys, possibly due to the flat surface-brightness distributions of this potential new population. Analysis of the full sample will show if this might have a significant effect on previous cosmological parameter constraints based on RASS cluster surveys.
2018年12月27日（周四）14:00-16:00【主講】Chengyong Du (Sichuan Normal University)【地點】Room 9, Quan Zhai, BICMR, Peking University【內容】In this talk we will introduce various constructions on (Lie) groupoids originated from orbifold Gromov-Witten theory. We first consider the construction of groupoid of morphisms of groupoids (Morphism groupoids), this would be the foundation for studying moduli spaces in orbifold Gromov-Witten theory. Then we consider groupoid extension/fibration with fiber being groupoids. A gerbe is a special case of groupoid extension. We classify groupoid extensions. Finally, we discuss the morphism groupoids of fiber class morphism to a groupoid extension. This is the first step to study the orbifold Gromov-Witten theory of groupoid extensions. This talk is based on recent joint works with B. Chen, R. Wang and Y. Wan.
2018年12月27日（周四）16:00-17:00【主講】Xiangcheng（Ma
University of California, Berkeley）【地點】KIAA, Peking University, Auditorium【內容】Understanding the formation of galaxies in the first billion years of the Universe is one of the key questions in galaxy evolution as well as cosmic reionization. Despite the remarkable progress on finding large samples of z>5 galaxies in the past few years, many big questions still remain unsolved. By reviewing recent progress and major challenges in this field, I will introduce a suite of high-resolution cosmological zoom-in simulations of galaxies down to z=5, taking advantage of the realistic models of the multi-phase ISM, star formation, and stellar feedback from the Feedback in Realistic Environments (FIRE) project. With unprecedented resolution and details, these simulation provide a realistic sample of model galaxies, which can play a unique role in planning and interpreting current and future observations. I will discuss several key results we have learned from these simulations, including (i) the formation of globular clusters in z>5 galaxies and their complications in measuring the faint-end galaxy ultraviolet luminosity functions (UVLFs) at these redshifts, (ii) the effects of dust attenuation on the UV properties and IR emission of high-redshift galaxies, and (iii) the escape fractions of ionizing photons from z>5 galaxies and their connection to strong emission line properties. I will discuss how these results motivate future theoretical and observational work.
2018年12月27日（周四）10:00-11:30【主講】Ningzhong Li（University of Texas at Dallas）【地點】Room 217, Guanghua Building 2, Peking University【內容】This paper examines the association between firms』 political connection and their voluntary disclosure on government subsidies using a sample of Chinese non-state-owned enterprises. For the sample period 2007~2016, we find that politically connected subsidy-receiving firms provide a lower amount of subsidy disclosures through annual reports than unconnected ones. This association is mainly driven by connected firms whose subsidies are difficult to justify, is stronger for firms registered in provinces with a higher level of corruption and firm with higher media attention, and becomes weaker following the anti-corruption campaign starting in late 2012. These findings suggest that politically connected subsidy recipients tend to withhold subsidy information to reduce the costs for the politicians they connect to and themselves from the public scrutiny of subsidies granted through relationships. Consistent with this interpretation, we further show that politically connected firms are granted more subsidies and this association is stronger in provinces with a higher level of corruption and becomes weaker following the anti-corruption campaign.
2018年12月27日（周四）15:00-16:00【主講】Zhichao Peng (Rensselaer Polytechnic Institute)【地點】Room 1493, Sciences Building No. 1, Peking University【內容】The kinetic transport equation in a diffusive scaling converges to a limiting diffusion equation, as the Knudsen number goes to 0. To deal with multi-scale problems for this model, we develop a family of asymptotic preserving schemes. These schemes have high order accuracy and are able to capture the correct diffusion limit without resolving the small physical regime. They are based on micro-macro decomposition and a reformulation of the decomposed system. We apply high order implicit-explicit Runge-Kutta (IMEX-RK) method in time and a local discontinuous Galerkin spatial discretization. Our schemes are unconditionally stable in the diffusive regime and have the standard hyperbolic time step restriction in the hyperbolic regime.
2018年12月28日（周五）13:00-14:00【主講】趙國屏【地點】北京大學生命科學學院鄧祐才
2018年12月28日（周五）12:00-13:00【主講】Hui Li (MIT)【地點】KIAA, 1st meeting room, Peking University【內容】Over the past decades, the discovery of a large number of young massive clusters (YMCs) in the local Universe and giant clumps in high-z galaxies suggests that clustered star formation is the dominant star formation mode. Mass and energy feedback from these enormous clusters is inevitably responsible for shaping the properties of their host galaxies. To model star formation in a more realistic way, I implemented a novel prescription in cosmological hydrodynamic simulations by treating star clusters as a unit of star formation. I tested this algorithm by running a suite of cosmological simulations with unprecedented parsec-scale spatial resolution. I found that various observed properties of host galaxies and star clusters are reproduced. Interestingly, we find some of these properties can be used to calibrate the subgrid models in the simulations. We follow the orbits of all simulated star clusters, estimate the cluster mass loss due to tidal disruption, and for the first time, investigate the connection between YMCs formed at high-z and the globular clusters observed at present. In parallel, to study how giant molecular clouds (GMCs) collapse to form star clusters and how they are eventually disrupted by stellar feedback from massive stars, I performed a suite of high-resolution hydrodynamic simulations of individual GMCs with self-consistent star formation and momentum feedback. I find that the final star cluster mass depends strongly on the surface density of the cloud due to the force balancing between gravity and momentum feedback.
2018年12月28日（周五）15:10【主講】Dr. Kai Wang（王凱） （Postdoctoral of Harvard medical School）【地點】北京大學二教412【內容】Current protocols to differentiate human induced pluripotent stem cells (h-iPSCs) into endothelial cells (h-iECs) lack reliability. Here we describe a method for rapid, consistent and highly efficient generation of h-iECs from h-iPSCs. The protocol entails delivery of modified mRNA encoding the transcription factor ETV2 at the intermediate mesodermal stage of differentiation. This approach reproducibly differentiated thirteen diverse h-iPSC lines into h-iECs with exceedingly high efficiency. In contrast, differentiation with the standard protocol, which relies on endogenous ETV2, was inefficient and notably inconsistent. Our method generated h-iECs that were functionally competent in many respects, including ability to form perfused vascular networks in vivo. Importantly, timely activation of ETV2 was critical and bypassing the mesodermal stage produced putative h-iECs with reduced expansion potential and that lacked ability to form functional vessels. Our protocol could have broad application in regenerative medicine and reliably provide an unlimited number of autologous h-iECs for vascular therapies.
2018年12月28日（周五）15:00-16:00【主講】Nicolas Templier (Cornell University)【地點】Room 1114, Sciences Building No. 1, Peking University【內容】The talk will keep the prerequisite knowledge to a minimum by introducing all of the above concepts with the example of projective spaces. In fact we'll spend a significant portion of the talk discussing properties of Bessel functions because it gives insights on how our proof goes.
2018年12月28日（周五） 10:10-11:10【主講】Jing-Song Huang (The Hong Kong University of Science and Technology)【地點】Room 1556(1560), Sciences Building No. 1, Peking University【內容】The aim of this talk is to show that our recent work joint with Pandzic and Vogan on Classifying unitary representations by their Dirac cohomology shed light on what kind of irreducible unitary representations should be defined as unipotent. Our results suggest that we shall approach the problem by study the coherent continuation of unitary representations with nonzero Dirac cohomology.
清華講座 共12場
2018年12月24日（周一）14:00【主講】Tianbo Liu【地點】清華大學理科樓物理系C109
2018年12月25日（周二）15:30-17:00【主講】Helios Herrera（英國華威大學副教授）【地點】清華大學經管學院 舜德樓220【語言】英語
2018年12月25日（周二）10:30-12:00【主講】伊犁相關政府人員【地點】清華大學學生職業發展指導中心華為廳
2018年12月25日（周二）19:00【主講】白重恩（清華大學經濟管理學院弗裡曼講席教授、院長、博士生導師，清華大學中國財政稅收研究所所長，清華大學-香港中文大學中國經濟聯合研究中心聯席主任，清華大學-芝加哥大學經濟與金融聯合研究中心管委會聯席主席。曾任教于波士頓學院、香港大學經濟金融學院）【地點】清華大學新清華學堂【注】12月20日 周四 12:00，開始領票 領完即止【領票地點】新清華學堂票廳（新清華學堂東南角）學生服務中心總服務臺109房間【領票辦法】持本人高校或中學學生證/教工證，每人每證限領兩張
2018年12月26日（周三）10:30【主講】Zhou Chen
【地點】清華大學物理系理科樓C302
2018年12月26日（周三）10:00-11:30【主講】李寧忠（美國德州大學達拉斯分校副教授）【地點】清華大學經管學院 偉倫336【語言】英語
2018年12月26日（周三） 10:00-12:00主講】Hai Wang（新加坡管理大學助理教授）【地點】清華大學經管學院 偉倫樓453【語言】英語
2018年12月27日（周四）16:00【主講】朱詩亮（南京大學物理學院）【內容】相位因子被稱為二十世紀理論物理學研究三大主旋律之一。幾何相因子(幾何相位)的提出是量子力學研究的開創性成果。相位因子是量子力學最核心的概念之一，對它的認識伴隨著整個量子力學和量子場論的發展。薛丁格方程的提出，虛數i首次出現在物理學運動方程中，表明複數的引進不僅是數學工具的方便，更是量子力學描述世界的必須，相位開始成為物理學的核心概念。稍後，狄拉克引入波函數相位因子，並用它證明，如果世界上有一個磁單極，那麼電荷必須是量子化的，這一優美的理論把相位和拓撲聯繫在一起。1954年，楊振寧-米爾斯非阿貝爾規範場理論的提出，把U(1)相位推廣到SU(2)相位，構築了粒子之間相互作用的基石。1959年，Aharonov 和Bohm 發現了AB相位，認識到要描述電磁場，場強不夠，矢勢更為基本。從1974年開始，楊振寧等用系列文章證明，要描述規範場，場強不足夠，矢勢有冗餘，而相位因子恰好能描述規範勢。
【地點】清華大學理科樓鄭裕彤講堂
2018年12月27日（周四）10:30【主講】李聯合（英國利茲大學）【內容】半導體太赫茲(THz)量子級聯雷射器(QCL)是迄今為止唯一能夠在THz波段實現連續工作的高功率、緊湊型固態相干輻射源。自2002年研製成功以來，就引起了人們的廣泛關注和興趣，並迅速成為THz研究領域的熱點。經過不斷的器件設計改進和性能提高，其工作頻率已經可以覆蓋1.2到5.6 THz，脈衝輸出峰值功率達2.4 W。然而，由於基本物理機制的限制，目前THz QCL還需在低溫200 K以下工作。儘管如此，採用斯特令製冷器的「turn-key」 THz QCL系統卻已出現在商用市場上。THz QCL的材料生長製備是一項極具挑戰性的工作，僅有為數不多的研究所和大學有能力製備高性能器件。利茲大學是這一研究領域的先行者。經過十幾年的不懈努力和探索，已經實現了器件的可控性生長，能夠可重複性地製作實現各種頻率的高性能THz QCL並成功將其應用在了商用THz系統中。這一報告將討論這些高性能器件的生長製備、最新研究進展和部分應用【地點】清華大學物理系理科樓B406
2018年12月27日（周四）19：20【主講】金浩（北京舞蹈學院教授、舞蹈研究所所長、中國舞蹈博物館常務副館長、碩士生導師、中國古典舞系理論教研室主任、校學術委員會委員、民族舞蹈文化研究基地學術委員（特聘研究員），中國文藝評論家協會音樂舞蹈藝術委員會副秘書長，中國高等教育學會美育專業委員會常務理事，北京文藝評論家協會理事，北京美學會理事，首批入選首都優秀中青年文藝人才庫、國家社科基金同行評議專家庫）【內容】舞蹈是一門古老而年輕的藝術，論古老——它是人類產生的最早的藝術門類之一，說年輕——它成為獨立性表演的藝術門類歷時相對比較短暫。舞蹈是誰？舞蹈就是你自己，只要你動作，舞蹈就自然生成！舞蹈是你能看得見，摸得著，感知和體驗得到的動作藝術。舞蹈賞析，是人們在觀看舞蹈表演時所激發的審美上的感思，它是通過舞者的肢體語言恰切傳釋的身體符號與信息，從而達到藝術上的共鳴。審美是創意的源泉，藝術創意則是審美基礎的延伸。在每一個人的印象中，我們都有著對舞蹈審美與創意不同的理解與感知，舞蹈審美意味著超逸的渴望，它穿越了藝術的斑斕時空，讓整個生命隨之舞動起來，使自己獲得支配生命的熱情【地點】清華大學蒙民偉樓多功能廳
2018年12月27日（周四）14:00-15:30【主講】肖瀟（北京大學助理教授）【地點】清華大學經管學院 偉倫336【語言】英語
2018年12月29日（周四）15:30-17:00【主講】Wolfgang Baumeister【主持】王宏偉（清華大學生命科學學院教授）【地點】清華大學生物新館143
其他高校
12月24日 （周一）共8場
2018年12月24日（周一）10:00【主講】Sichun Yang【地點】北京航空航天大學主樓316會議室
2018年12月24日（周一）10:00-12:00【主講】楊海（香港科技大學講座教授、《Transportation Research Part B》刊物主編）【地點】北京航空航天大學新主樓A716
2018年12月24日（周一）12:00-13:30【主講】EL KAMEL教授（法國裡爾中央大學）【地點】北京航空航天大學新主樓A622
2018年12月24日（周一）14:00-15:00【主講】Xinyi Li（University of Chicago, USA）【地點】Room 1418, Sciences Building No. 1, Peking University【內容】In this talk, I will talk about loop-erased random walk (LERW) in three dimensions. I will first give an asymptotic estimate on the probability that 3D LERW passes a given point (commonly referred to as the one-point function).
2018年12月24日（周一）15:00-16:00【主講】Xuhua He (University of Maryland)【地點】Room 77201, Jingchunyuan 78, BICMR, Peking University【內容】In a 1957 paper, Tits explained the analogy between the symmetric group S_n and the general linear group over a finite field F_q and indicated that S_n should be regarded as the general linear group over F_1, the field of one element.
2018年12月24日（周一）15:00-16:00【主講】Xiaoming He (Missouri University of S&T)【地點】北京師範大學教八401
2018年12月24日（周一）15:00-16:30【主講】朱玉潔（中國氣象局發展研究中心戰略研究室主任，正研級高工，《氣象科技進展》編委會委員。研究領域：氣象公共政策與戰略規劃、生態文明與氣候變化）【地點】中國農業大學西校區資源與環境學院5-219
2018年12月24日（周一）20:00-21:30【地點】（北京東城）雨兒胡同2非遺博物館2樓【報名】http://t.cn/EUEXy2J
12月25日（周二） 共6場
2018年12月25日（周二）10:30-11:30【主講】Chong Wang（McMaster University）【地點】Room 78201, Jingchunyuan 78, BICMR, Peking University【內容】Skin pigmentation, animal coats and block copolymers can be considered as multi-constituent inhibitory systems. Exquisitely structured patterns arise as orderly outcomes of the self-organization principle. Analytically, via the sharp interface model, patterns can be studied as nonlocal geometric variational problems
2018年12月25日（周二）19:30【地點】中國音樂學院國音堂音樂廳【領票方式】編輯簡訊（姓名?票數）發送至13051676226（楊同學） ，音樂會當天18:30-19:15於中國音樂學院國音堂音樂廳門口取票【備註】1.2米以下的兒童不能入場
2018年12月25日（周二）15:00-17:00【主講】田原（ 2013年獲得澳大利亞阿德萊德大學博士學位，博士期間獲得阿德萊德大學國際學生獎學金，阿德萊德大學化學工程系差旅基金。博士研究側重於應用同步輻射吸收光譜研究成礦流體性質及熱力學參數，博士期間曾以第一作者在地球化學頂級期刊Geochimica et Cosmochimica Acta和Chemical Geology發表論文，其博士論文獲得阿德萊德大學優秀博士論文獎。2012-2013年，曾在南澳州政府礦產資源部（DMITRE）從事礦物廢料研究及管理工作）【地點】中國地質大學逸夫樓816
2018年12月25日（周二）13：30-15：00【主講】楊汝岱（北京大學博雅青年學者，經濟學院副教授、博士生導師。研究領域為發展經濟學）【地點】對外經濟貿易大學博學樓1222教室
2018年12月25日(周二)9:30-11:00 15:00-16:30【地點】首都圖書館A座三層青少年多媒體空間【內容】黃石國家公園簡稱黃石公園，由美國國家公園管理局負責管理。1872年3月1日它被正式命名為保護野生動物和自然資源的國家公園，於1978年被列入世界自然遺產名錄。這是世界上第一個最大的國家公園。黃石國家公園佔地面積約為898317公頃，主要位於美國懷俄明州，部分位於蒙大拿州和愛達荷州。黃石公園分五個區：西北的猛獁象溫泉區以石灰石臺階為主，故也稱熱臺階區；東北為羅斯福區，仍保留著老西部景觀；中間為峽谷區，可觀賞黃石大峽谷和瀑布；東南為黃石湖區，主要是湖光山色；西及西南為間歇噴泉區，遍布間歇泉、溫泉、蒸氣池、熱水潭、泥地和噴氣孔。園內設有歷史古蹟博物館。
2018年12月25日（周二）9:00—10:30【主講】張弓博士（張弓教授是慢病管理和生物醫學工程的專家。曾在2009，2010年連續獲得加拿大生物醫學商業化發明創新大獎。)【地點】北京體育大學中國運動與健康研究院401教室【注】http://t.cn/EUt1aUJ（點擊連結註冊報名，免費領取電子票，憑票入場，註冊後請注意查收電子票郵件。）
12月26日（周三） 共11場
2018年12月26日（周三）13:30—15:00【主講】饒瑤博士（英國利物浦大學管理學院經濟學副教授。主要研究方向包括時間序列，平面數據計量經濟學，統計和計量模型的應用,金融計量經濟學）【地點】對外經濟貿易大學博學樓1222教室
2018年12月26日（周三）14:00-16:00【主講】許智宏（北京大學生命科學學院，中國科學院上海植物生理研究所研究員，中科院院士、第三世界科學院院士，長期從事植物發育生物學、植物細胞培養及其遺傳操作、植物生物工程的研究，具有極為高深的學術造詣）【地點】中國農業大學西校區生命科學研究中心大報告廳
2018年12月26日（周三） 18：30-20：30【主講】張衛東（著名崑曲表演藝術家、理論家，國家一級崑曲演員，古文詩詞吟誦家，戲曲民俗研究家）【地點】北京涵芬樓書店 二樓（北京市東城區王府井大街36號）
2018年12月26日（周三）12:15-13:45【主講】李巍（中國人民大學國際關係學院教授）【地點】中國人民大學明德國際樓813會議室
2018年12月26日（周三）8：30【主講】閻學民 （密蘇裡大學）；趙大旋（中國人民大學商學院）等【地點】中國人民大學明德商學樓604室
2018年12月26日（周三）15：00【嘉賓】美國籤證處籤證官【地點】中國人民大學公共教學二樓2119
2018年12月26日（周三）9:00-11:00【主講】陳小野（中國中醫科學院中醫基礎理論研究所研究員）【地點】中國中醫科學院中醫基礎理論研究所六樓會議室
2018年12月26日（周三）13:00 - 18:00【嘉賓】陳文玲（中國國際經濟交流中心總經濟師）；王帆（外交學院副院長（副校長））；喻國明 （北京師範大學新聞學院院長）等【地點】中國人民大學逸夫會議中心第一會議室【報名方式】報名郵箱baoming_nads@126.com，郵件標題請註明「中美關係與公共外交40年圓桌論壇+姓名+單位機構+手機號碼」，報名截止時間2018年12月24日12:00。我們將郵件回復您參會回執信息。
2018年12月26日（周三） 9:30-11:30【主講】文歷陽，華中科技大學教授，教育部、國家衛健委醫學教育政策諮詢委員會委員、教育部全國衛生職業教育教學指導委員會副主任委員、中國高等教育學會醫學教育專業委員會顧問、教學管理研究會名譽理事長、國家醫學考試中心專家委員會主任委員【地點】北京大學醫學部逸夫樓507
2018年12月26日（周三）14:30-16:30【主講】劉勇，文學博士，教育部 「長江學者」特聘教授，「馬克思理論研究與建設工程」《20世紀中國文學史》首席專家。北京師範大學二級教授，博士生導師，文學院現當代文學學科帶頭人【地點】北京語言大學教三樓200
2018年12月26日（周三）13:30-18:00【主講】郭春付工程師【地點】北京師範大學物理樓106
12月27日（周四） 共4場
2018年12月27日（周四）12:10-13:30【主講】李波（清華大學五道口金融學院助理教授。2013年畢業於加拿大女王大學經濟系，獲經濟學博士學位；研究領域為公司金融、政治經濟學和企業破產等，並在Journal of Finance, Law, and Accounting等期刊上發表論文）【地點】中央財經大學學院南路校區學術會堂712
2018年12月27日（周四）19:00-21:00【主講】郭慶旺（中國人民大學財政金融學院教授、中國財政學會副會長）；劉怡（北京大學財政系主任，教授）等【地點】中國人民大學重陽金融研究院602會議室【報名連接】http://t.cn/E4cqbmd
2018年12月27日（周四）13：30-15：00【主講】李智（廈門大學經濟學院財政系及王亞南經濟學院助理教授。主要研究領域為公共經濟學、實驗經濟學、資源和環境經濟學，目前著重研究閾值公共物品的提供機制及其在現實中的應用，包括國際氣候合作、社區和局地公共服務的私人提供等，同時也在開展基於合作博弈的資源分配理論和實驗研究）【地點】對外經濟貿易大學博學樓1222教室
2018年12月27日（周四）16:00-17:00【主講】步尚全教授(清華大學)【地點】北京師範大學後主樓1124
12月28日(周五） 共5場
2018年12月28日（周五）14:00【主講】李曼【地點】中國農業大學東校區經管學院109室
2018年12月28日（周五）8:30【主講】湯谷良（博士，對外經濟貿易大學國際商學院教授）；黃蓉（現任長江商學院會計學副教授）等【地點】中國人民大學商學樓604教室【報名連接】http://t.cn/E4cXyXD
2018年12月28日（周五）14:00-15:00【主講】李國民博士現為美國德克薩斯大學西南醫學中心教授；德克薩斯大學西南醫學中心直腸癌研究中心主任；美國科學促進會會士；擔任Cell Research， JBC， DNA Repair, PLOS Genetics等多種學術刊物的編委；在包括Cell, Science, Mol. Cell, G&D, PNAS, eLIFE等學術刊物發表論文80多篇，是DNA錯配修復和基因組穩定性研究領域的國際權威【地點】首都師範大學理科樓430
2018年12月28日（周五）16:00 【主講】Jack Zhang（PhD, Assistant Professor Department of Biophysics and Biochemistry, Yale University）【地點】中國科學院 遺傳發育所2號樓B108會議室 【詳情】http://t.cn/EUhEJAV
2018年12月28日（周五）14：00-16：00【主講】王大良（著名姓氏與家譜文化研究專家，中央團校教授、科研部主任，中華炎黃文化研究會姓氏文化工作委員會執行會長）【地點】國家典籍博物館啟德廳 二層C202室【電話】010-88545048
12月29日（周六）共3場
2018年12月29日（周六）9:30【嘉賓】潘家農（中國楹聯學會副會長、中國詩詞研究院副院）【簡介】一、什麼是對聯；二、對聯所具有的獨特規則；三、名人趣味對聯故事。【地點】東城區第一圖書館 三層報告廳
2018年12月29日(周六) 14:30 【主講】呂曉 (南京藝術學院博士,中央美術學院博士後,北京畫院理論研究部主任、研究員，齊白石國際研究中心秘書長，中國美術家協會會員。出版《髡殘繪畫研究》《明末清初金陵畫壇研究》等8部個人專著，曾在《故宮博物院院刊》《美術研究》《美術》等國內學術期刊發表學術論文80餘篇。)【地點】中國美術館七層學術報告廳【內容】講座嘉賓將與聽眾共同探討「金陵八家」的繪畫風格、共性與差異，金陵畫壇盛衰的原因等諸多問題 ；從而梳理明末清初金陵畫壇的整體面貌、藝術特質、成就與根源。歡迎大家踴躍報名。【結合展覽】金陵盛跡——十七世紀的金陵畫壇【報名】 http://t.cn/EUNjkmG進入「講座報名」後，請註冊中國美術館會員進行活動預約。已為中國美術館會員的，請登錄用戶中心直接進行「活動預約」。報名成功將收到簡訊回復，憑簡訊入場。報名不成功將不另行通知。 【注】1、12周歲以下兒童謝絕入場。2、由於場地限制，13：30-14：20為入場時間，截止講座開場前10分鐘我們將不再保留您的席位。講座開始後停止入場
2018年12月29日（周六）10:00-11:00【主講】李芳（中山大學數學學院）【地點】北京師範大學後主樓1223
12月30日（周日） 共7場
2018年12月30日-2019年1月1日【路線】北京大學東門----惠新西街北口----貢寶拉格草原（住）----平頂草原----貝子廟（住）----別力古臺鎮蘇尼特左旗----中國國門----二連市（住）----朱日和----火山群----惠新西街北口----北京大學東門【費用】12月23日之前（含23日）繳費 ￥699 元 /12月23日之後繳費 ￥759元（均3日大巴車+3晚住宿+30萬保額的旅遊意外保險+活動組織服務）http://t.cn/E4cIUJw
2018年12月30日(周日)10:00【主講】Grace媽媽【地址】國家圖書館少年兒童館
2018年12月30日（周日）10:30【地點】西西弗書店·北京豐臺永旺店（北京市豐臺區豐葆路88號院1號樓永旺夢樂城1層）【報名連結】http://t.cn/E2YiF6V
2018年11月20日 - 2018年12月30日【簡介】展覽用生活情景來構建改革記憶，將村寨故事拼合進歷史長卷，從而連綴出一部充滿色彩的改革開放四十年史，為觀眾展示改革開放歷程中的難忘記憶與故事。【地點】中華世紀壇南廣場地下二層 當代藝術展廳
2018年2月2日—2018年12月30日【地點】中國美術館六樓藏寶閣【簡介】本次陳列選展了20世紀以來中國美術大家的國畫精品11件，油畫11件，雕塑4件，依然從審美角度萃集小幅經典，由「小」切入，讓觀眾了解大師們何以將平凡的生活化為藝術的形式，在筆觸、色彩、線條、墨韻中體驗精神的感性顯現，從而在圖像中領悟藝術的真諦。
2018年2月2日（周五） - 2018年12月30日（周日）【地點】北京市東城區五四大街一號
2018年2月2日（周五） - 2018年12月30日（周日）【地點】北京市東城區五四大街一號
本版編輯：張雨凝
匯聚、分享、交流、碰撞。北京高端名家講座、文化活動第一發布和交流平臺！2010年誕生於北大清華校園中，涵蓋人大、北師大等北京各高校、及社會最高品味的開放免費講座和活動，7年70000場。名校課表共享每1年數萬門。經濟人文、社科管理經典，學術思想前沿。大師身邊宜聆教，未來精英共成長！