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An automatic compensation method on compression effect and surface elasticity measurement based on the deflection signal of AFM

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Science China(Technological Sciences) 2011年第9期54卷 2397-2403页

作者： WEI YangJie wu ChengDong DONG ZaiLi Graduate School of Chinese Academy of Sciences & the State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110016 China School of lnformation Science & Engineering Northeast University Shenyang 110004 China State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110016 China

Atomic force microscope （AFM）, as an important instrument in micro/nano operation, has been widely used to measure sampie＇s height information. However, the so called compression effect, due to force aroused from the contact of AFM tip with a sample surface, would result in imprecision of the surface＇s height measurement, i.e., the measured height is lower than expected. Up to now, there is not any effective and rapid method to attenuate this kind of measurement error. Thus, in this paper, an algorithm to obtain high accurate height measurement is proposed. Firstly, the concept of force curve is used to analyze the basic principle of the compression effect. Secondly, an automatic compensation method by fusing the height signal and the deflection signal is proposed. The proposed algorithm can also be used to obtain a surface elasticity image. Finally, in order to validate the proposed method, two experiments are conducted with respect to mufti-wall nano-carbon tubes on a silicon substrate and graphemes on a mica substrate.

关键词： atomic force microscope (AFM) compression effect information fusion surface elasticity

论民事裁定的逻辑结构与效力基础——围绕《民事诉讼法》第157条展开

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中国法律评论 2023年第6期54卷 81-93页

作者：傅郁林北京大学法学院

“判决、裁定”这样“判一裁混装”式法律表述正在模糊依我国通说划定的裁定与判决泾渭分明的边界,裁定在未增加任何程序保障或证明难度的情形下却悄然获得了与判决同等的效力,引起了法律解读与适用的普遍混乱。但这种状况实质上是裁判... 详细信息

“判决、裁定”这样“判一裁混装”式法律表述正在模糊依我国通说划定的裁定与判决泾渭分明的边界,裁定在未增加任何程序保障或证明难度的情形下却悄然获得了与判决同等的效力,引起了法律解读与适用的普遍混乱。但这种状况实质上是裁判制度“发育青春期”对我国传统裁判理论的“反叛”。但随着当事人主体地位与程序保障理念的引入及其对裁判程序的正当化、多样化需求,随着当代社会紧急救济诉求的剧增及其对裁判对象与证明标准的多元化、多层次化塑造,裁判理论须自我更新才能为现行法提供合理解释和弥补法律漏洞的新的逻辑基础,比如以裁判对象、裁判程序、证明标准、裁判效力等多要素考量及其相互匹配的逻辑为基础,重构我国民事裁判理论。

关键词：民事裁判程序保障民事裁定裁判程序多层次化法律漏洞法律解读逻辑结构

Regulation of the pentose phosphate pathway in cancer

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Protein & Cell 2014年第8期5卷 592-602页

作者： Peng Jiang Wenjing Du Mian wu School of Life Sciences Tsinghua University Beijing 100084 China Hefei National Laboratory for Physical Sciences at Microscale School of Life Sciences University of Science and Technology of China Hefei Anhui 230027 China Department of Cancer Biology Perelman School of Medicine Abramson Family Cancer Research Institute University of Pennsylvania Philadelphia PA 19104 USA

Energy metabolism is significantly reprogrammed in many human cancers, and these alterations confer many advantages to cancer cells, including the pro- motion of biosynthesis, ATP generation, detoxification and support of rapid proliferation. The pentose phos- phate pathway （PPP） is a major pathway for glucose catabolism. The PPP directs glucose flux to its oxi- dative branch and produces a reduced form of nico- tinamide adenine dinucleotide phosphate （NADPH）, an essential reductant in anabolic processes. It has become clear that the PPP plays a critical role in regulating cancer cell growth by supplying cells with not only ribose-5-phosphate but also NADPH for detoxification of intracellular reactive oxygen species, reductive biosynthesis and ribose biogenesis. Thus, alteration of the PPP contributes directly to cell pro- liferation, survival and senescence. Furthermore, recent studies have shown that the PPP is regulated oncogenically and/or metabolically by numerous fac- tors, including tumor suppressors, oncoproteins and intracellular metabolites. Dysregulation of PPP flux dramatically impacts cancer growth and survival. Therefore, a better understanding of how the PPP is reprogrammed and the mechanism underlying the balance between glycolysis and PPP flux in cancer will be valuable in developing therapeutic strategies targeting this pathway.

关键词： pentose phosphate pathway (PPP)G6PD NADPH glucose metabolism cancer cellproliferation

Effects of carbon anhydrase on utilization of bicarbonate in microalgae:a case study in Lake Hongfeng

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Acta Geochimica 2018年第4期37卷 519-525页

作者： Haitao Li Yanyou wu Lihua Zhao State Key Laboratory of Environmental Geochemistry/Institute of Geochemistry Chinese Academy of Sciences School of Karst Science Guizhou Normal University/State Engineering Technology Institute for Karst Desertfication Control

A bidirectional labeling method was established to distinguish the proportions of HCO3- and CO2 utiliza- tion pathways of microalgae in Lake Hongfeng. The method was based on microalgae cultured in a medium by adding equal concentrations of NaH13CO3 with different 613C values simultaneously. The inorganic carbon sources were quantified according to the stable carbon isotope composition in the treated microalgae. The effects of extracellular carbonic anhydrase （CAex） on the HCO3 and CO2 utilization pathways were distinguished using acetazolamide, a potent membrane-impermeable carbonic anhydrase inhibitor. The results show utilization of the added HCO3- was only 8% of the total carbon sources in karst lake. The proportion of the HCO3- utilization path- way was 52% of total inorganic carbon assimilation. Therefore, in the natural water of the karst area, the microalgae used less bicarbonate that preexisted in the aqueous medium than CO2 derived from the atmosphere. CAex increased the utilization of inorganic carbon from the atmosphere. The microalgae with CAex had greater carbon sequestration capacity in this karst area.

关键词： Microalgae Carbonic anhydrase Stable carbon isotope Inorganic carbon utilization

Composites of Graphene and LiFePO_4 as Cathode Materials for Lithium-Ion Battery:A Mini-review

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Nano-Micro Letters 2014年第4期6卷 316-326页

作者： Haixia wu Qinjiao Liu Shouwu Guo Key Laboratory for Thin Film and Microfabrication of the Ministry of Education School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University

This mini-review highlights selectively the recent research progress in the composites of Li Fe PO4 and graphene. In particularly, the different fabrication protocols, and the electrochemical performance of the composites are summarized in detail. The structural and morphology characters of graphene sheets that may affect the property of the composites are discussed briefly. The possible ongoing researches in area are speculated upon.

关键词： Lithium iron phosphate Graphene Composite Electrochemical property Lithium-ion battery

Phosphorus speciation in surface sediments of a hypertrophic lake,Southwestern China:insights from fractionation and ^(31)P NMR

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Chinese Journal Of Geochemistry 2015年第2期34卷 167-176页

作者： Runyu Zhang Liying Wang Fengchang wu State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of Sciences Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education Chinese Research Academy of Environmental Sciences

Phosphorus(P) species in surface sediments from a shallow,hypertrophic lake,Lake Dianchi,China,were investigated by P fractionation and ^(31)P nuclear magnetic resonance(NMR) spectroscopy during a regional algal *** addition,their potential contributions to the overlying water were also *** fractions of P extracted by NH_4C1,bicarbonate dithionite and NaOH ranged from 340.6 to 1,725.8 mg kg^(-1),accounting for20.5%-67.2%of the total P.A two-step extraction method refinement of P recovery was performed before the^(31)P NMR *** rates of sedimentary TP and organic P,by combining EDTA pretreatment and NaOH or mixed reagents,ranged from 31.8%to 69.3%and from19.8%to 51.7%.^(31)P NMR results showed that ortho-P and monoester-P were the most abundant P components in the sediment extractable P of sediments,followed by diester-P and *** distribution of the sum of ortho-P,diester-P and pyro-P detected by P NMR corresponded well with the labile P concentration determined by *** exhibited a significant positive correlation with the total P in the water column,suggesting that internal loading may be an important source of P for the lake *** P other than ortho-P may contribute to phytoplankton growth,with the relative proportion being 4.4%-18.7%.The release of labile P fractions fueled algal bloom,and the decay of organic matter,following the bloom events,consumed oxygen and elevated the pH *** co-dependence might lead to a vicious *** mechanisms of various P species remain ambiguous and are worthy of further investigation.

关键词：表层沉积物 NMR分析中国西南地区湖泊生态系统磷形态分馏肥大连二亚硫酸钠

Attention Guided Food Recognition via Multi-Stage Local Feature Fusion

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Computers, Materials & Continua 2024年第8期80卷 1985-2003页

作者： Gonghui Deng Dunzhi wu Weizhen Chen School of Electrical and Electronic Engineering Wuhan Polytechnic UniversityWuhan430048China

The task of food image recognition,a nuanced subset of fine-grained image recognition,grapples with substantial intra-class variation and minimal inter-class *** challenges are compounded by the irregular and multi-scale nature of food *** these complexities,our study introduces an advanced model that leverages multiple attention mechanisms and multi-stage local fusion,grounded in the ConvNeXt *** model employs hybrid attention(HA)mechanisms to pinpoint critical discriminative regions within images,substantially mitigating the influence of background ***,it introduces a multi-stage local fusion(MSLF)module,fostering long-distance dependencies between feature maps at varying *** approach facilitates the assimilation of complementary features across scales,significantly bolstering the model’s capacity for feature ***,we constructed a dataset named Roushi60,which consists of 60 different categories of common meat *** evaluation of the ETH Food-101,ChineseFoodNet,and Roushi60 datasets reveals that our model achieves recognition accuracies of 91.12%,82.86%,and 92.50%,*** figures not only mark an improvement of 1.04%,3.42%,and 1.36%over the foundational ConvNeXt network but also surpass the performance of most contemporary food image recognition *** advancements underscore the efficacy of our proposed model in navigating the intricate landscape of food image recognition,setting a new benchmark for the field.

关键词： Fine-grained image recognition food image recognition attention mechanism local feature fusion

Controlled Synthesis and Multifunctional Properties of FePt-Au Heterostructures

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Nano Research 2011年第9期4卷 836-848页

作者： Jiajia wu Yanglong Hou Song Gao Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications Collegeof Chemistry and Molecular Engineering Beijing 100871 China Department of Advanced Materials and Nanotechnology College of Engineering Peking University Beijing 100871 China

In this work FePt-Au heterostructured nanocrystals （HNCs） such as tadpole-, dumbbell-, bead-, and necklace-like nanostructures were synthesized by a facile heteroepitaxial growth of Au NCs onto FePt nanorods （NRs）. A study of the growth mechanism revealed that the morphology control of the final products can be correlated with the adsorption sites of hydrogen onto the FePt NRs, which can be manipulated by the amount of the forming gas （At/7% H2） added. Not only the optical characteristic and magnetic properties of the intrinsic materials were retained in the products, but also the FePt-Au HNCs showed the tunable multifunctional properties resulted from the interactions between Au and FePt. Moreover, for methanol oxidation, the FePt-Au HNCs exhibited enhanced catalytic activity and CO tolerance on the catalyst surface compared to commercial Pt catalysts. It is worth noting that as multifunctional units, the FePt-Au HNCs also possess a heterogeneous surface, which could potentially enable their site-specific functionalization for targeting or imaging purposes in biomedical applications. More interestingly, the catalytic properties of the FePt-Au HNCs also endow this material with application potentials in nanocatalysis.

关键词： Heterostructure heteroepitaxy multifunctionality magnetism nanocatalysis

ON CORE STRUCTURE PROPERTIES AND PEIERLS STRESS OF DISSOCIATED SUPERDISLOCATIONS IN ALUMINIDES:NiAl AND FeAl

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Acta Mechanica Solida Sinica 2010年第3期23卷 213-219页

作者： Xiaozhi wu Shaofeng Wang Congbo Li Institute .for Structure and Function Chongqing University Chongqing 400044 China State Key Laboratory of Mechanical Transmission Chongqing University Chongqing 400044 China

The study of dislocation properties in B2 structure intermetallics NiAl and FeAl is crucial to understand their mechanical behaviors. In this paper, the core structure and Peierls stress of collinear dissociated （111）{110} edge superdislocations in NiAl and FeAl are investigated with the modified P-N dislocation equation. The generalized stacking fault energy curve along （111） direction in {110} slip plane contains two modification factors that can assure the antiphase energy and the unstable stacking fault energy to change independently. The results show that the core width of superpartials decreases with the increasing unstable stacking fault energy, and increases with the increasing antiphase boundary energy. The calculated Peierls stress of （111）{ 110） edge superdislocations in NiAl and FeAl are 475 MPa and 3042 MPa, respectively. The values of Peierls stress in NiAl is in accordance in magnitude with the experimental and the molecular statics simulations results.

关键词： core structure Peierls stress NiAl FeAl