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Scale-up of biomass conversion using 1-ethyl-3-methylimidazolium acetate as the solvent

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Green Energy & Environment 2019年第4期4卷 432-438页

作者： Ling Liang Jipeng Yan Qian He Tina Luong Todd R.Pray Blake A.Simmons Ning Sun Advanced Biofuels and Bioproducts Process Development Unit Lawrence Berkeley National LaboratoryEmeryvilleCA94608USA Joint BioEnergy Institute Lawrence Berkeley National LaboratoryEmeryvilleCA94608USA

This scale-up study demonstrated the feasibility of an ionic liquid(IL)pretreatment process at 40 kg scale,using the IL 1-ethyl-3-methylimidazolium acetate([C2C1Im][OAc])as the solvent.The pretreatment was followed by enzymatic hydrolysis through which the process efficiency for biomass conversion to monomeric sugars was determined.The results show that 43 wt%of switchgrass was dissolved in IL after 2 h of pretreatment at 160℃ with 15 wt%solid loading.A 120 h enzymatic hydrolysis of the pretreated switchgrass results in 96%glucan and 98%xylan conversion.[C2C1Im][OAc]pretreatment has been successfully scaled up to 40 kg with improved sugar titers and yields relative to bench scale(6 kg).The mass flow of the overall process was established and the major scale-up challenges of the process were identified.

关键词： Ionic liquid 1-Ethyl-3-methylimidazolium acetate Pretreatment Scale up Enzyme

Feather evolution: looking up close and through deep time

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Science Bulletin 2019年第9期64卷 563-564页

作者： Xing Xu Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology & PaleoanthropologyChinese Academy of Sciences Center for Excellence in Life and Paleoenvironment Chinese Academy of Sciences

The last two decades have witnessed significant advances in our understanding of the evolution of major avian characteristics(1–6)In particular, the spectacular discoveries of fossilized feathered dinosaurs from China and elsewhere have provided key insights into feather evolution (1,2)These fossils indicate that many non-avialan dinosaurs were feathered animals just like living birds.

关键词： looking up close and through deep time

Blow up for Systems of Wave Equations in Exterior Domain

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Chinese Annals of Mathematics,Series B 2019年第3期40卷 339-348页

作者： Xiuwen LUO School of Mathematical Sciences Fudan University

In this paper the author studies the initial boundary value problem of semilinear wave systems in exterior domain in high dimensions(n ≥ 3). Blow up result is established and what is more, the author gets the upper b... 详细信息

关键词： Wave equations Exterior domain Blow up Lifespan

Forty Years of Reform and Opening up:The Birth and Development of China's Criminal Justice System

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Frontiers of Law in China-Selected Publications from Chinese Universities 2019年第1期14卷 73-85页

作者：卞建林谢潮 China University of Political Science and Law Beijing 100088China School of Criminal Justice China University of Political Science and LawBeijing 100088China

The Third Plenary Session of the 11 th Central Committee of the Communist Party of China held in 1978 marked the initiation of the policy of reform and opening up in China,beginning a new chapter in the construction of a socialist legal system.The first Chinese criminal procedure law was promulgated the following year and was revised twice in 1996 and 2012.Although remarkable progress has been made,the level of the rule of law in China's criminal procedure must still be improved to meet the goal of modernizing the criminal rule of law.

关键词： reform and opening up criminal procedure litigation systems trial-centered leniency for confession and acceptance of punishment

Automatic video mosaicking algorithm via dynamic key-frame

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Journal of Systems Engineering and Electronics 2020年第2期31卷 272-278页

作者： JI Yufeng LI Weixing FENG Kai XING Boyang PAN Feng School of Automation Beijing Institute of TechnologyBeijing 100081China Kunming-BIT Industry Technology Research Institute Co. LtdKunming 650106China

Automatic video mosaicking is a challenging task in computer vision. Current researches consider either panoramic or mapping tasks on short videos. In this paper, an automatic mosaicking algorithm is proposed for both mapping and panoramic tasks based on the adapted key-frame on videos of any length.The speeded up robust features(SURF) and the grid motion statistic(GMS) algorithm are used for feature extraction and matching between consecutive frames, which are used to compute the transformation. In order to reduce the influence of the accumulated error during image stitching, an evaluation metric is put forward for the transformation matrix. Besides, a self-growth method is employed to stitch the global image for long videos. The algorithm is evaluated by using aerial-view and panoramic videos respectively on the graphic processing unit(GPU) device, which can satisfy the real-time requirement. The experimental results demonstrate that the proposed algorithm is able to achieve a better performance than the state-of-art.

关键词： video mosaicking image stitching speeded up robust feature(SURF) panorama mapping

Primary hepatic neuroendocrine tumor case with a preoperative course of 26 years: A case report and literature review

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World Journal of Gastroenterology 2018年第24期24卷 2640-2646页

作者： Xiang-Fei Meng Ying-Wei Pan Zhan-Bo Wang Wei-Dong Duan Department of Hepatobiliary Surgery Chinese PLA General Hospital Department of Pathology Chinese PLA General Hospital

Primary hepatic neuroendocrine tumor(PHNET) is an extremely rare liver tumor. Patients often have no clinical symptoms or have only non-specific symptoms, such as abdominal pain and abdominal mass. The clinical manifestations, disease development, treatment methods, and treatment outcomes of PHNET vary greatly among cases. Here we report a case of PHNET with a confirmed 26-year survival before surgery. The patient was a 56-year-old female. A large right hepatic mass was detected when the patient was 30 years old. The tumor could not be removed during exploratory laparotomy, and constriction of the right hepatic artery and biopsy were conducted. Pathological results indicated a diagnosis of benign tumor, but a confirmed diagnosis was not reached. Twenty-six years after the patient had been living with the tumor, she sought treatment again because of tumor progression. After systematic evaluation of the resectability, the tumor was resected. Based on the examination results of the gastrointestinal tract and lungs, intraoperative examination results, pathological findings, and long-term follow-up results, the diagnosis of PHNET was confirmed. This case represents the longest reported survival time for a PHNET patient before removal of the tumor.

关键词： Primary hepatic neuroendocrine tumor Surgery Pathology Radiology Surgical plan Follow up

Conjugated polymer nanoparticles as fluorescence switch for selective cell imaging

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Chinese Chemical Letters 2020年第3期31卷 755-758页

作者： Ke Peng Fengting Lv Huan Lu Jianwu Wang Hao Zhao Libing Liu Shu Wang Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China College of Chemistry University of Chinese Academy of SciencesBeijing 100049China

Fluorescence switch plays a vital role in bioelectronics and bioimaging.Herein,we presented a new kind of facile electrostatic complex nanoparticles(ECNs)for fluorescence switching in cells and marking of individual cell.The ECNs were prepared by mixing positively charged poly(6-(2-(thiophen-3-yl)ethoxy)hexyl trimethylammonium bromide)(PT)and negatively charged diarylethene sodium salt(DAECOONa).DAE-COONa is a photoswitchable molecule which can be transformed between the ring-closed fo rm and ring-open form under the irradiation of UV or visible light.The closed-form of DAE-COONa can efficie ntly quench the fluorescence of PT through intermolecular energy transfer,while the open form of DAE-COONa does not influence the emission of PT.Thus,the fluorescence of ECNs can be modulated by light irradiation,and the ECNs with good fluorescence switching performance have been employed for fluorescence imaging and individual cell lighting up process successfully.We demonstrate that the electrostatic complex strategy provides a facile method to construct fluorescence switch fo r selective cell marking and imaging applications.

关键词： Electrostatic complex nanoparticles Conjugated polymers Fluorescence switch Cell imaging Selective cell lighting up

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基于自然场景在线学习的跟踪注册技术

软件学报 2016年第11期27卷 2929-2945页

作者：桂振文刘越陈靖王涌天中国电子科技集团公司第七研究所广东广州510310 北京理工大学光电学院北京100081 北京市混合现实与新型显示工程技术研究中心(北京理工大学) 北京100081

三维注册是移动增强现实的关键技术之一,提出了一种在线学习的跟踪注册方法,能够精确地对自然场景进行跟踪注册.该方法首先改进SURF(speeded up robust features)描述符匹配方法,提高初始注册矩阵的正确性;然后,通过对场景进行有效的在... 详细信息

三维注册是移动增强现实的关键技术之一,提出了一种在线学习的跟踪注册方法,能够精确地对自然场景进行跟踪注册.该方法首先改进SURF(speeded up robust features)描述符匹配方法,提高初始注册矩阵的正确性;然后,通过对场景进行有效的在线学习,提高注册精度;最后,利用前一帧的注册矩阵快速恢复已丢失的关键点,以提高注册的速度.实验结果表明,该方法能够较为流畅地对视频帧进行跟踪,并能保持较好的注册精度.

关键词：跟踪注册 SURF(speeded up robust features)描述符在线学习

The Modernization of Chinese Civil Law over Four Decades

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Frontiers of Law in China-Selected Publications from Chinese Universities 2019年第1期14卷 39-72页

作者：王利明 School of Law Renmin University of China Beijing China Renmin University of China BeijingChina Civil Law Society of China Renmin University of China Beijing 100872China

This article reviews the historical development of Chinese civil law since reform and opening up of China and argues that the primary achievement of civil law legislation over the last four decades has been the formation of a comprehensive civil legal system.Today's civil law system in China not only satisfies the institutional requirements for building a market economy but also constructs a legal rights system and establishes fundamental civil law principles,such as individual autonomy,equal protection,good faith,and fairness.In the 40 years since reform and opening up,there have been significant innovations with regard to the specific systems,systemic structures,and fiindamental principles of Chinese civil law.This article summarizes the experiences of China's civil law legislation since reform and opening up and looks ahead to how the anticipated "civil law codification" suitable for the modem era will develop a modem legal code based on China's domestic circumstances.

关键词： reform and opening up 40 years Chinese civil law civil law codification