检索结果-南通市图书馆

Coordinate-wise monotonic transformations enable privacy-preserving age estimation with 3D face point cloud

在线全文

学校读者我要写书评

暂无评论

Science China Life Sciences 2024年第7期67卷 1489-1501页

作者： Xinyu yang Runhan Li Xindi Yang Yong Zhou Yi Liu Jing-Dong J.Han School of Life Sciences Peking University Peking-Tsinghua Center for Life Sciences Academy for Advanced Interdisciplinary StudiesCenter for Quantitative Biology(CQB)Peking University Beijing Key Lab of Traffic Data Analysis and Mining School of Computer and Information TechnologyBeijing Jiaotong University Clinical Research Institute Shanghai General HospitalShanghai Jiao Tong University School of Medicine

The human face is a valuable biomarker of aging, but the collection and use of its image raise significant privacy concerns. Here we present an approach for facial data masking that preserves age-related features using coordinate-wise monotonic transformations. We first develop a deep learning model that estimates age directly from non-registered face point clouds with high accuracy and generalizability. We show that the model learns a highly indistinguishable mapping using faces treated with coordinate-wise monotonic transformations, indicating that the relative positioning of facial information is a low-level biomarker of facial aging. Through visual perception tests and computational3D face verification experiments, we demonstrate that transformed faces are significantly more difficult to perceive for human but not for machines, except when only the face shape information is accessible. Our study leads to a facial data protection guideline that has the potential to broaden public access to face datasets with minimized privacy risks.

关键词： face point cloud age estimation face verification privacy coordinate-wise monotonic transformation

Dose-adjusted EPOCH-R vs.R-CHOP in frontline management of Waldeyer’s ring diffuse large B-cell lymphoma:a retrospective study from a single institution

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2023年第2期136卷 167-175页

作者： Yuanzheng Liang xindi Liu Jing yang Henan Wang Yingshi Piao Liqiang Wei Liang Wang Department of Hematology Beijing Tongren HospitalCapital Medical UniversityBeijing 100730China Department of Pathology Beijing Tongren HospitalCapital Medical UniversityBeijing 100730China Beijing Key Laboratory of Head and Neck Molecular Diagnostic Pathology Beijing Tongren HospitalCapital Medical UniversityBeijing 100730China

Background: To compare the efficacy and safety of dose-adjusted etoposide, prednisone, vincristine, cyclophosphamide, and doxorubicin plus rituximab (DA-EPOCH-R) with standard rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) in Waldeyer’s ring diffuse large B-cell lymphoma (WR-DLBCL) at a single institution. Methods: This retrospective study included 115 newly diagnosed patients with WR-DLBCL, of whom 68 patients received R-CHOP, and 47 patients received DA-EPOCH-R as their first-line treatment. The baseline features of the two groups were well balanced using a 1:1 propensity score matching method, and a total of 84 cases were obtained, including respective 42 cases in the R-CHOP and DA-EPOCH-R groups, for further survival and prognosis analysis. The primary objectives included progression-free survival (PFS) and overall survival (OS). Results: During a median follow-up of 45 months, there were nine (21.4%) deaths in the R-CHOP group and two (4.8%) in the DA-EPOCH-R group. Kaplan-Meier analysis showed statistically significant improvements in PFS and OS in patients with DA-EPOCH-R compared with those treated with R-CHOP (log-rank test, P = 0.025 and P = 0.035, respectively). The 2-year PFS and OS rates in the DA-EPOCH-R group were 90.1% (95% confidence interval [CI]: 81.4-99.8%) and 95.2% (95% CI: 89.0-100.0%), respectively, and 80.5% (95% CI: 69.3-93.6%) and 90.5% (95% CI: 52.8-99.8%) in the R-CHOP group. Patients without B symptoms and elevated lactate dehydrogenase levels had a higher PFS in the DA-EPOCH-R group, with P values of 0.038 (hazard ratio [HR]: 0.11;95% CI: 0.01-0.88) and 0.042 (HR: 0.19;95% CI: 0.04-0.94), respectively. There were no statistically significant differences in clinical responses and treatment-related toxicities between the two groups. Conclusion: Compared with patients received R-CHOP, those treated by DA-EPOCH-R had superior PFS, OS, and controlled toxicity in patients with WR-DLBCL.

关键词： Waldeyer’s ring B-cell lymphoma DA-EPOCH-R R-CHOP

数字背景下电影空间与叙事关系的反思——一种界面建构的可能

在线全文

学校读者我要写书评

暂无评论

北京电影学院学报 2024年第2期 60-67页

作者：杨歆迪北京电影学院数字媒体学院

当下学界对于讨论电影叙事与空间问题的自觉意识,侧面传递出中国电影的叙事惯例与空间特征在数字语境下所面临的挑战。从电影理论内部而言,与电影“空间”相关的讨论首先来自对银幕和画面的分析。作为社会行动的空间经由“游荡者”的视... 详细信息

当下学界对于讨论电影叙事与空间问题的自觉意识,侧面传递出中国电影的叙事惯例与空间特征在数字语境下所面临的挑战。从电影理论内部而言,与电影“空间”相关的讨论首先来自对银幕和画面的分析。作为社会行动的空间经由“游荡者”的视角开展,并通过被叙述者记录下来的、实时生成的表征性空间进行表达。空间展开的方式即是叙事性的,而叙事则作为空间生成的由来。查特曼关于“话语―空间”的命名方式间接承认了叙述者的存在,而界面则承担了叙述者话语的功能。界面空间在短时间内被广泛利用的背后,是新媒体的语言进入电影之后的媒介融合。电影的界面空间可以经由叙述者身份的媒介化而游弋至银幕之外。通过在界面空间中穿梭,电影观众对于媒介经验的结构情感外化背后是一种对于“可玩/可互动”的影像的主体性追求。

关键词：界面空间叙事

Potential regulation of small RNAs on bacterial function activities in pig farm wastewater treatment plants

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2020年第5期32卷 292-300页

作者： Yiwen yang Sicheng Xing Sumin Li Yajing Niu Cheng Li Tuoxin Huang xindi Liao College of Animal Science South China Agricultural UniversityGuangzhou 510642China Key Laboratory of Tropical Agricultural Environment Ministry of AgricultureSouth China Agricultural UniversityGuangzhou 510642China Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding South China Agriculture UniversityGuangzhou 510642China

Small RNAs(sRNAs)are key players in the regulation of bacterial gene expression.However,the distribution and regulatory functions of sRNA in pig farm wastewater treatment plants(WWTPs)remains unknown.In this study,the wastewaters in anoxic and oxic tanks of the WWTPs were collected.The profiles of the community structure,mRNA expression,and sRNA expression of bacteria in pig farm wastewater were investigated using transcriptome sequencing and qPCR.This study demonstrated that there was a higher abundance of sRNA in the pig farm WWTPs and 52 sRNAs were detected.The sRNAs were mainly present in Proteobacteria and Firmicutes,including the potential human pathogenic bacteria(HPB)(Escherichia,Shigella,Bordetella and Morganella),crop pathogen(Pectobacterium)and denitrifying bacteria(Zobellella).And the sRNAs were involved in the bacterial functional activities such as translation,transcription,drug resistance,membrane transport and amino acid metabolism.In addition,most sRNAs had a higher abundance in anoxic tanks which contained a higher abundance of the genes associated with infectious diseases and drug resistance than that in oxic tanks.The results presented here show that in pig farm WWTPs,sRNA played an important role in bacterial function activities,especially the infectious diseases,drug resistance and denitrification,which can provide a new point of penetration for improving the pig farm WWTPs.

关键词： Small RNA Regulation Bacterial function Pig farm Wastewater treatment plants

Crystal phase engineering of electrocatalysts for energy conversions

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第12期15卷 10194-10217页

作者： Hui Chen Mingcheng Zhang Yanfei Wang Ke Sun Lina Wang Zhoubing Xie Yucheng Shen xindi Han Lan yang Xiaoxin Zou State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun130012China Petrochina Petrochemical Research Institute Beijing102206China

Crystal phase is an intrinsic structural parameter to determine the physicochemical properties and functionalities of materials.The unconventional phases of materials with distinct atomic arrangements from their thermodynamically stable phases have attracted enormous attention.Phase engineering has recently made fruitful achievements in electrocatalysis field to optimize the performance of various electrochemical reactions.In this review,theoretical and experimental advances made in phase engineering of electrocatalysts are summarized.First,we introduce basic understanding on crystal phases of catalysts to show the dialectical relationship between bulk phase and surface catalytic layer,and highlight the multiple functions of phase engineering in catalysis studies.We then describe phase-controlled synthesis of materials through various experimental methods such as wet-chemical method,phase transition,and template growth.As a focus,we discuss the wide usage of phase engineering strategy in different kinds of electrocatalytic materials,and particular emphasis is given to establishment of reasonable crystal phase-activity relationship.Finally,we propose several future directions for developing more desirable electrocatalysts by rational crystal phase design.

关键词： crystal phase electrocatalysis transition metal atomic arrangement energy conversion

Integrated photonic RF self-interference cancellation on a silicon platform for full-duplex communication

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2023年第10期11卷 1635-1646页

作者： XIUYOU HAN XINXIN SU MENG CHAO Xindi Yang WEIHENG WANG SHUANGLING FU YICHENG DU ZHENLIN WU MINGSHAN ZHAO School of Optoelectronic Engineering and Instrumentation Science Dalian University of TechnologyDalian 116024China

In-band full-duplex(IBFD) technology can double the spectrum utilization efficiency for wireless communications,and increase the data transmission rate of B5G and 6G networks and satellite communications. RF self-interference is the major challenge for the application of IBFD technology, which must be resolved. Compared with the conventional electronic method, the photonic self-interference cancellation(PSIC) technique has the advantages of wide bandwidth, high amplitude and time delay tuning precision, and immunity to electromagnetic interference.Integrating the PSIC system on chip can effectively reduce the size, weight, and power consumption and meet the application requirement, especially for mobile terminals and small satellite payloads. In this paper, the silicon integrated PSIC chip is presented first and demonstrated for IBFD communication. The integrated PSIC chip comprises function units including phase modulation, time delay and amplitude tuning, sideband filtering, and photodetection, which complete the matching conditions for RF self-interference cancellation. Over the wide frequency range of C, X, Ku, and K bands, from 5 GHz to 25 GHz, a cancellation depth of more than 20 dB is achieved with the narrowest bandwidth of 140 MHz. A maximum bandwidth of 630 MHz is obtained at a center frequency of10 GHz. The full-duplex communication experiment at Ku-band by using the PSIC chip is carried out. Cancellation depths of 24.9 dB and 26.6 dB are measured for a bandwidth of 100 MHz at central frequencies of 12.4 GHz and14.2 GHz, respectively, and the signal of interest(SOI) with 16-quadrature amplitude modulation is recovered successfully. The factors affecting the cancellation depth and maximum interference to the SOI ratio are investigated in detail. The performances of the integrated PSIC system including link gain, noise figure, receiving sensitivity, and spurious free dynamic range are characterized.

关键词： communication tuning duplex

集体的赛博格进化——当生成式AI进入数字劳动与视觉生产

在线全文

学校读者我要写书评

暂无评论

戏剧与影视评论 2024年第1期 59-68页

作者：杨歆迪北京电影学院数字媒体学院

生成式AI人机协同创作的流程范式展示出其在效率提升和范式书写上巨大的优越性,却也带来了新的人机磨合问题。AIGC参与社会分工的意义可能已然大于参与艺术创作的意义,并由此带来了关于后全球化时代数字劳动异化的新问题。人类主体不再... 详细信息

生成式AI人机协同创作的流程范式展示出其在效率提升和范式书写上巨大的优越性,却也带来了新的人机磨合问题。AIGC参与社会分工的意义可能已然大于参与艺术创作的意义,并由此带来了关于后全球化时代数字劳动异化的新问题。人类主体不再是科学活动的中心,从而转向到了后人类主义的空间。AIGC给予人机协同创作的挑战深入到人类与机器语言的语法矛盾之中。在已知的赛博主体进化中,人机语言的交互生成已经成为现实。通过对于语言架构和生成流程的把握,普通用户的个性化尝试也成为多人协同合作的“中心化”权力集束。借用关于游戏模组创作者的论述可以用来解释在AI创作框架内进行创意生产的消费者们被剥削、被掠夺的事实,而大模型对于世界的数据化重构加剧了数字劳动的不平等。对于数字劳工而言,伴随AI的赛博格进化可以看作社会范式的人类增强,在人机协同工作的进程中多元化地消解专属于人类的知识生产方式。

关键词：生成式AI 赛博格后人类数字劳工

“看中国”如何讲好中国故事?——“当代与传统:中国文化国际影响力生成之‘看中国’的美学表达与国际影响力”研讨会综述

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

当代电影 2019年第3期 175-176页

作者：杨歆迪杨卓凡北京师范大学艺术与传媒学院北京师范大学中国文化国际传播研究院讲师100875

近年来,中国文化的国际影响力日益显著,并尝试通过多种途径与媒介生成兼顾传统理念与当代价值的实际文化影响力。在此背景下,北京师范大学中国文化国际传播研究院于2018年11月30日举办“当代与传统:中国文化国际影响力生成”论坛,邀请... 详细信息

近年来,中国文化的国际影响力日益显著,并尝试通过多种途径与媒介生成兼顾传统理念与当代价值的实际文化影响力。在此背景下,北京师范大学中国文化国际传播研究院于2018年11月30日举办“当代与传统:中国文化国际影响力生成”论坛,邀请中外艺术学、文学、社会学等领域的专家六十余人展开研讨与会专家借助不同学科与领域的经验,希望对中国文化的国际传播,尤其是传统文化的'齐代价值转换方面提供新的构想。

关键词：国际影响力中国文化中国故事研讨会综述美学表达当代北京师范大学国际传播

“媒体艺术社会学”实践性导向课程思政建设探索

在线全文

学校读者我要写书评

暂无评论

北京教育（德育） 2023年第5期 36-40,75页

作者：杨歆迪张文强北京电影学院数字媒体学院北京100088

“媒体艺术社会学”课程作为北京电影学院数字媒体艺术专业的高年级理论课程,尝试将思想政治教育融入专业理论教学,帮助学生建立辩证唯物主义艺术观,培养扎实的社会调查能力和职业道德,使用全新艺术形式讲好中国故事,并尝试在课程思政... 详细信息

“媒体艺术社会学”课程作为北京电影学院数字媒体艺术专业的高年级理论课程,尝试将思想政治教育融入专业理论教学,帮助学生建立辩证唯物主义艺术观,培养扎实的社会调查能力和职业道德,使用全新艺术形式讲好中国故事,并尝试在课程思政建设中为新文科自主知识体系作出贡献。课程针对本校本专业学生思想多元、个性突出的特点因材施教,立足数字媒体艺术专业宽口径、复合型、高创新的行业现状,立足学校办学特色和人才培养的实际情况,根据学生专业学习的阶梯式成长特征,系统设计课程思政教学路径。

关键词：课程思政数字媒体艺术专业建设