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Last Deglaciation Climatic Fluctuation Record by the Palaeo-Daocheng Ice Cap, Southeastern Qinghai-Tibetan Plateau

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Acta Geologica Sinica(English Edition) 2014年第6期88卷 1863-1874页

作者： ZHANG Zhigang xu Xiaobin WANG Jian ZHAO Zhijun BAI shibiao CHANG Zhi Yang School of Geographical Sciences Nanjing Normal University Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Jiangsu Second Normal University Key Laboratory of Virtual Geographical Environment Nanjing Normal University Nanjing Institute of Tourism and Hospitality

The last deglaciation, a key period for understanding present and future climate changes, has long been the hot topic for palaeoclimatological study. The Qinghai-Tibetan Plateau（QTP） is often a target study area for understanding hemispheric, or even global environment changes. The glacial landforms on the QTP provide a unique perspective for its climate change. In order to investigate the onset of the last deglaciation at the QTP and its regional correlation, the terrestrial cosmogenic nuclides（TCN） 10 Be and 26 Al surface exposure dating was chosen to date the roche moutonnée, the polished surface and the moraine debris located at the palaeo-Daocheng Ice Cap（pDIC）, southeastern QTP. Our results show that the onset of the last deglaciation is at about 19 ka, followed by another warming event occurring around 15 ka in the p-DIC area. These timings agree well with other records, e.g. equivalent with a rapid sea level rise at 19 ka and the onset of B？lling warming event at about 15 ka. Thus, our new data can provide good reveal constraint on the climate evolution at the QTP.

关键词： Terrestrial Cosmogenic Nuclides Last Deglaciation Palaeo-Daocheng Ice Cap Qinghai Tibetan Plateau

基于特征混合聚类和关键点检测的智能人脸搜索

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集成技术 2022年第1期11卷 52-65页

作者：张昭辉张吉光徐士彪孟维亮程章林张晓鹏中国科学院自动化研究所北京100190 中国科学院大学北京100049 北京邮电大学北京100876 中国科学院深圳先进技术研究院深圳518055

在信息产业急剧膨胀的时代背景下,主流数字媒体产生了由文字到图片再到视频的演化,如何快速有效地获取视频中人物的关键信息,成为各大互联网娱乐和大数据分析领域争相研究的话题。然而,现有的人物信息获取方法还有极大的局限性,无法在... 详细信息

在信息产业急剧膨胀的时代背景下,主流数字媒体产生了由文字到图片再到视频的演化,如何快速有效地获取视频中人物的关键信息,成为各大互联网娱乐和大数据分析领域争相研究的话题。然而,现有的人物信息获取方法还有极大的局限性,无法在视频界面直接获取信息。为了解决这一问题,该文提出了一种新的“由粗到细”的基于特征混合聚类和关键点检测的智能人脸搜索框架,实现了对互联网视频数据的实时检测与高鲁棒的视频人脸数据智能搜索。该文将大数据下人脸数据实时搜索工作细分,首先,通过基于多尺度深度特征混合聚类的人脸检测算法,使用Softmax函数实现数据分类,并运用中心损失函数center loss形成聚类中心,随后通过对中心点的回归矫正,达成人脸的粗筛选;然后,通过基于脸部关键点检测算法,提取68个人脸关键特征点,生成易于计算处理的标准化特征码。此外,该文还构造了两个影视类人脸数据集,为后续相关互联网行业、娱乐多媒体提供大数据分析。基于该文章整体实验结果表明,在人脸快速检测方面,与现有的主流方法相比,该文方法在识别精度和效率上,都具有一定的提升,其中,基于多尺度深度特征混合聚类算法实验的识别效率提升31.2%,假阳性样本辨别力提升3倍,整体运行效率达标,具有一定的实用价值。

关键词：深度学习人脸检测混合聚类爬虫技术

基于改进RPN深度网络的端到端的监控场景行人检测研究

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中国体视学与图像分析 2017年第2期22卷 209-215页

作者：杨东明徐士彪孟维亮葛水英杨真张晓鹏中国科学院文献情报中心北京100090 中国科学院大学北京100090 中国科学院自动化研究所北京100090

监控场景下的行人检测相比其他场景,具有人流量大,遮挡程度高的特点。针对该场景,本文提出基于RPN深度网络的端到端检测方案。一方面改进了RPN深度网络,结合自行设计的深度卷积网络,获得了针对行人检测的深度网络。另一方面通过引入头... 详细信息

监控场景下的行人检测相比其他场景,具有人流量大,遮挡程度高的特点。针对该场景,本文提出基于RPN深度网络的端到端检测方案。一方面改进了RPN深度网络,结合自行设计的深度卷积网络,获得了针对行人检测的深度网络。另一方面通过引入头肩模型进一步提高了针对该场景行人检测的检测性能,同时提升了检测实时性,最终实现了端到端检测。实验表明,本文方法有效提升了监控场景行人检测的检测性能和实时性,降低了检测漏检率。

关键词：监控行人检测深度学习 RPN网络

An automatic gain adjustment Campbell integrator for neutron flux detection in ITER

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Nuclear Science and Techniques 2012年第2期23卷 114-117页

作者： CAO Hongrui LI Shiping xu Xiufeng TANG shibiao YANG Jinwei YANG Qingwei YIN Zejie State Key Lab Particle Detect&Elect University of Science and Technology of ChinaHefei 230026China Southwestern Institute of Physics Chengdu 610041China

Neutron Flux Monitor, a key diagnostic system in International Thermonuclear Experimental Reactor, may provide for reading a series of important parameters in fusion reaction process. We designed an important part of its main electronic system - Automatic Gain Adjustment Campbell Integrator (AGACI), expanding the detecting neutron counting rate of 104-108 cps (counts per second). The total gain of AGACI in five files is divided into 1, 10, 100, 1000, and 10 000 times, and can be automatically adjusted. The linear correlation coefficient (R) is more than 0.9999 in AGACI working range.

关键词：增益调整中子通量 ITER 贝尔检测国际热核实验反应堆积分线性相关系数

Detection of genes encoding EAL domain proteins from ***

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Hemolysin Sph2 of Leptospira interrogans Inducing Cell Apoptosis via Intracellular ROS Elevation and Mitochondrial Membrane Injury

2017年浙江省微生物学会青年论坛——微生物与健康专题研讨会

作者： shibiao Ding Rongbo Che Fudi Yuan Jie Yan xu'ai Lin Department of Clinical Laboratory Hospital of integrated traditional Chinese and Western Department of Medical Microbiology and Parasitology School of MedicineZhejiang University

[Objective]To analysis the genes,A1 S1254 and A1 S2422,involved in cyclic di-nucleotide(c-di-GMP) degeneration of Acinetobacter baumannii.[Methods]The sequences of the A1 S1254 and A1 S2422 genes were obtained according to bioinformatics analysis and GeneBank Acinetobacter baumannii genome *** designed the specific primers according to the gene sequence in GeneBank,PCR technology was used to amplify the sequence of the A1 S1254 and A1 S2422 *** prokaryotic expression system of A1 S1254 and A1 S2422 genes was built using molecular biological methods such as T-A *** the expression of the genes were induced by IPTG and identified by SDS-PAGE gel electrophoresis and coomassie brilliant blue *** function of the recombinant proteins was determined using HPLC method.[Results]Through bioinformatics analysis,we found that there are 12 related to c-di-GMP synthesis and degradation of protein coding genes in Acinetobacter baumannii,including 7 with guanosine monophosphate cyclase(GGDEF) characteristic conservative sequence,2 characteristic with phosphodiesterase(EAL) conservative sequence,3 have GGDEF and EAL structure domain at the same time,but no phosphodiesterase domain specificity of HD-GYP structure and signal *** prokaryotic recombinant plasmids sequences were corrected through the colony PCR,double enzyme digestion,and *** are able to efficiently express the target proteins after transforming them into the sensory cell BL21(DE3) in inclusion body *** results showed that the two proteins can degrade c-di-GMP and form pGpG.[Conclusion]The prokaryotic expression vectors of two Acinetobacter baumannii cyclic di-nucleotide(c-di-GMP)degeneration enzyme genes were successfully constructed in this *** recombinant proteins can function as a phosphodiesterases(PDEs),which may participate in the regulation of biofilms formation and virulence factors by c-di-GMP.

关键词： Acinetobacter baumannii c-di-GMP Phosphodiesterase EAL domain

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Hemolysin Sph2 of Leptospira interrogans Inducing Cell Apopt...

浙江省免疫学会第六次会员代表大会暨第十一次学术大会

作者： Rongbo Che shibiao Ding Qinchao Zhang Weiqun Yang Jie Yan xu’ai Lin Department of Medical Microbiology and Parasitology School of Medicine Zhejiang University Department of Clinical Laboratory Hospital of integrated traditional Chinese and Western Basic Medical Microbiology Division State Key Laboratory for Diagnosis and Treatment of Infectious DiseasesSchool of Medicine Zhejiang University

Leptospira interrogans causes a widespread leptospirosis in humans and animals,with major symptoms of jaundice and ***2,a member of the sphigomyelinase hemolysins,is an important virulence factor of *** this study,the function and mechanism of Sph2 in the pathogenesis of leptospirosis were studied to further understand the pathogenesis of *** result of real-time PCR showed that compared with the control,sph2 gene was transiently expressed during the infection of human umbilical vein endothelial cells(HUVEC),human embryo liver cells(L02)and human epithelial lung cells(L132),respectively,and the expression level reached the peak at 45 min after *** LDH assay and confocal laser scanning microscope results showed that the recombinant Sph2(rSph2)can internalize cells not only by damaging the cell membrane but also via a dynamin-dependent and clathrin-mediated ***,rSph2 might translocated to mitochondria result in the increase of reactive oxygen species(ROS)level and decrease of the mitochondrial membrane potential(△Ψ).Flow cytometry results indicated that the ratio of HUVEC,L02 and L132 cell apoptosis,caused by rSph2,was 28.7%,31% and 27.3%,*** the apoptosis could be decreased by the ROS inhibitor N-acetyl cysteine(NAC).Taken together,these experiments suggested that rSph2 triggers apoptosis of target cells through the mitochondrial pathway based on the membrane damage and ROS *** apoptotic potential of rSph2 indicates a probable mechanism of leptospiral hemolysin involvement in the pathogenesis of leptospirosis.

关键词： Leptospirosis Sphingomyelinase hemolysin Sph2 Apoptosis Mitochondria

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农业退水分层利用装置设计与数值模拟

农业机械学报 2017年第6期48卷 203-209页

作者：孙志林李众彻方诗标许丹浙江大学港口海岸与近海工程研究所杭州310058

从理论可行性出发,初步设计一种分流装置,再从功能和效率的角度对其进行改进,最后采用计算流体力学软件Fluent对农业退水分流过程进行数值模拟,对比分析不同流速下的盐度场和速度场,结果表明该分流装置可为最终设计提供参考。试验工况分... 详细信息

从理论可行性出发,初步设计一种分流装置,再从功能和效率的角度对其进行改进,最后采用计算流体力学软件Fluent对农业退水分流过程进行数值模拟,对比分析不同流速下的盐度场和速度场,结果表明该分流装置可为最终设计提供参考。试验工况分3组进行,设定入口流速作为唯一变量,3组试验均假定相同的入口盐度分布函数。截取2个Y轴剖面的流速场云图和4个X轴剖面的盐度场云图进行对比分析。结果表明,分流装置可以对不同盐度的农业退水进行分流。上导流槽得到低盐度农业退水,下导流槽得到较高盐度退水。分流的效率取决于装置尺寸、分层流流速和盐度分布等因素,可根据实际情况进行调整和优化。

关键词：农业退水分流装置排碱渠数值模拟盐碱地

镍盐前体对Ni/γ-Al_2O_3催化剂催化加氢活性的影响

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催化学报 2007年第7期28卷 651-656页

作者：任世彪邱金恒王春燕许波连范以宁陈懿南京大学化学化工学院介观化学教育部重点实验室江苏省纳米技术重点实验室江苏南京210093

用X射线衍射、紫外-可见漫反射光谱、程序升温还原、CO化学吸附和微反应测试等方法研究了不同镍盐前体制备的负载型Ni/γ-Al2O3催化剂的结构和催化α-蒎烯加氢活性.结果表明,用醋酸镍前体制备的催化剂的催化加氢活性远高于用硝酸镍前体... 详细信息

用X射线衍射、紫外-可见漫反射光谱、程序升温还原、CO化学吸附和微反应测试等方法研究了不同镍盐前体制备的负载型Ni/γ-Al2O3催化剂的结构和催化α-蒎烯加氢活性.结果表明,用醋酸镍前体制备的催化剂的催化加氢活性远高于用硝酸镍前体制备的催化剂,并且这种催化加氢活性的差异与不同前体制备的Ni O/γ-Al2O3样品表面Ni2+的分散状态及还原度密切相关.当Ni2+负载量远低于其在γ-Al2O3载体表面上的分散容量时,Ni2+优先嵌入载体表面四面体空位,随着Ni2+负载量的增加,嵌入载体表面八面体空位的Ni2+的比例增大.由于醋酸根阴离子对γ-Al2O3载体表面四面体空位的屏蔽效应大于硝酸根阴离子,在醋酸镍前体制备的Ni O/γ-Al2O3样品表面,Ni2+倾向于嵌入载体表面八面体空位且易被还原为金属态Ni0,故用醋酸镍前体制备的Ni/γ-Al2O3催化剂的催化α-蒎烯加氢活性高于用硝酸镍前体制备的催化剂.

关键词：镍氧化铝负载型催化剂前驱体 α-蒎烯催化加氢

青藏高原地区宇生核素暴露年代数据存在问题探讨

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地质论评 2014年第6期60卷 1359-1369页

作者：张志刚徐孝彬王建白世彪常直杨南京师范大学地理科学学院南京210023 江苏第二师范学院南京210024 南京师范大学虚拟地理环境教育部重点实验室南京210023

青藏高原是第四纪古冰川研究的理想区域也是宇宙成因核素(terrestrial cosmogenic nuclides,TCN)暴露测年技术应用的天然实验场所。然而,现有的TCN测年数据与先前学者基于其他测年手段的研究结果不一致,显得相对年轻。为了探索其原因,... 详细信息

青藏高原是第四纪古冰川研究的理想区域也是宇宙成因核素(terrestrial cosmogenic nuclides,TCN)暴露测年技术应用的天然实验场所。然而,现有的TCN测年数据与先前学者基于其他测年手段的研究结果不一致,显得相对年轻。为了探索其原因,本文尝试对青藏高原1594个TCN测年数据进行统计分析。研究结果表明:1测年样品中97%的样品是漂砾样品,测年数据中约有93%的年代数据小于130 ka;2 280组(n≥3)漂砾样品年代数据中大约76%的漂砾组数据变异系数大于10%,而基岩和羊背石样品组测年数据变异系数较低、相对集中;3冰碛垄表面漂砾样品的不等时暴露与后期侵蚀可能是造成TCN年代数据结果偏年轻的主要原因。本研究可为青藏高原地区冰川地貌TCN暴露年代研究提供重要启示。

关键词：青藏高原宇生核素暴露测年漂砾变异系数