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建筑实践 2024年第4期 152-153页

作者：曹伟孙承磊吉英雷 todd Pilgreen Roman Wittmer 舒帆东南大学建筑设计研究院有限公司晋思建筑设计事务所

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Lyapunov exponent,Liao perturbation and persistence

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Science China Mathematics 2020年第9期63卷 1913-1928页

作者： Wenxiang Sun todd Young School of Mathematical Sciences Peking UniversityBeijing 100871China Department of Mathematics Ohio UniversityAthensOH 45701USA

Consider a C1 vector eld together with an ergodic invariant probability that hasℓnonzero Lya-punov *** orthonormal moving frames along a generic orbit we construct a linear system ofℓdi erential equations which is a linearized Liao standard *** show that Lyapunov exponents of this linear system coincide with all the nonzero exponents of the given vector eld with respect to the given ergodic ***,we prove that these Lyapunov exponents have a persistence property meaning that a small perturbation to the linear system(Liao perturbation)preserves both the sign and the value of the nonzero Lyapunov exponents.

关键词： Lyapunov exponent Liao perturbation ergodic probability non-uniformly hyperbolicity

Kinetics of Molecular Recognition Mediated Nanoparticle Self-Assembly

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Nano Research 2009年第1期2卷 78-84页

作者： Chinmay Soman todd Giorgio Interdisciplinary Program in Materials Science Vanderbilt University201 West End AvenueNashvilleTN 37240USA Department of Biomedical Engineering Vanderbilt University201 West End AvenueNashvilleTN 37240USA

Nanoscale quantum dot-antibody conjugates have been shown to self-assemble to form micron-scale aggregates in the presence of specific proteomic *** self-assembly process exhibits sigmoidal kinetics,suggesting that nucleation limits ***-assembly kinetics in this study is characterized by flow cytometric analysis of the aggregation reaction over time.A range of physiologically relevant concentrations of the protein angiopoietin-2,a candidate cancer biomarker,are incubated with quantum dots conjugated with a polyclonal mixture of anti-angiopoietin-2 *** concentration modulates the slopes and inflection times of the sigmoidal kinetics *** understanding of self-assembly kinetics in this system may lead to improvements in sensitivity and specificity of this novel proteomic biomarker detection technique and improve the screening,diagnostics,and therapy response monitoring for cancers and other *** approach to studying the kinetics of nanoparticle self-assembly may also provide a valuable tool for understanding the fundamental characteristics of nanoscale particle aggregation.

关键词： Quantum dot self-assembly kinetics proteomics diagnostics has

New Methodological Approach to Investigation of Kinetics of REE Extraction in Nonstationary Conditions

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Journal of Rare Earths 2007年第4期25卷 385-391页

作者： Kopyrin A A Fomichev A A Afonin M A todd T A Saint-Petersburg Institute of Technology Idaho National Laboratory

The influence of periodical oscillations of the temperature on extraction and stripping processes in the extraction systems was studied. Two extraction systems were investigated：（1） 6 mol · L^-1 NaNO3-Nd（NO3）3-Pr（NO3）3-TBP kerosene and （2） [Nd（NO3）3 · 3TBP] -[ Pr（NO3）3 · 3TBP] -kerosene - 0.1 mol · L^-1 HNO3. Mathematical modeling of the nonstationary membrane extraction has been enhanced by including the dependence of the extraction rate constants on temperature. The values of activation energy for direct and reverse extraction and stripping reactions of Pr and Nd were calculated from experimental temporal dependencies of metal concentration and temperature by solving the reverse kinetics problem using the proposed mathematical model, A series of experiments with periodical oscillations of the temperature on the extraction system for the separation of rare earth elements （REE） using bulk liquid membrane between two extractors were performed. The mathematical model adequately describes the experimental data. The optimization of the extraction process for separation of REE by liquid membrane, under the influence of periodical oscillation of the temperature, was made based on the extraction rate constants and activation energies. The optimal conditions of separation by liquid membrane were found： frequency and amplitude of thermal oscillations, liquid membrane flow rate, and optimal ratio between organic and aqueous phase in extractors.

关键词： kinetics extraction non-stationary rare earths

Distribution of Primitive λ-Roots of Composite Moduli II

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Chinese Annals of Mathematics,Series B 2006年第5期27卷 549-552页

作者： Zhiyong ZHENG todd COCHRANE Department of Mathematical Sciences Tsinghua University Beijing 100084 China Department of Mathematics Kansas State University Manhattan Kansas 66506 USA.

We improve estimates for the distribution of primitive λ-roots of a composite modulus q yielding an asymptotic formula for the number of primitive A-roots in any interval I of length ｜I｜〉〉 q^1/2＋ε Similar results are obtained for the distribution of ordered pairs （x, x^-1） with x a primitive λ-root, and for the number of primitive A-roots satisfying inequalities such as ｜x - x^-1｜≤ B.

关键词： λ-Roots Primitive roots

Upper bounds on a two-term exponential sum

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Science China Mathematics 2001年第8期44卷 1003-1015页

作者： todd COCHRANE 郑志勇 Department of Mathematics Kansas State University Manhattan KS 66506 USA Department of Mathematics Tsinghua University Beijing 100084 China

We obtain upper bounds for mixed exponential sums of the type $S(\chi ,f,p^m ) = \sum\nolimits_{x = 1}^{p^n } {\chi (x)e} _{p^m } (ax^n + bx)$ where pm is a prime power with m? 2 and X is a multiplicative character (mod pm). If X is primitive or p?(a, b) then we obtain |S(χ,f,p m)| ?2np 2/3 m . If X is of conductor p and p?( a, b) then we get the stronger bound |S(χ,f,p m)|?np m/2.

关键词： exponential sums primitive character weil’sbound

Between Human and Animal： A Study of New Year＇s Sacrifice, Kong YijL and Diary of a Madman

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Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2012年第3期6卷 374-392页

作者： todd Foley Department of East Asian Studies New York University New York NY 10003 USA

A subtle aspect of Lu Xun＇s writing, running through several of his works of fiction, is his animalistic portrayal of some of his most well-known characters. Scraping away their humanity as he writes, Lu Xun depicts Kong Yiji, Xianglin Sao, and the infamous Madman crawling on their hands and knees, working like draught animals, and abandoning all rational thought. In short, all three end up occupying an ambiguous space between the realms of human and animal. This paper attempts to examine how Lu Xun＇s description and situation of these characters suggests, aside from the standard agendas of May Fourth writing in general, a certain, shared metaphysical conundrum. Drawing on the work of Giorgio Agamben to take the hiatus between human and animal as an occasion for ontological possibility, I will investigate how the dehumanized portrayal of these characters situates them at the threshold of a new becoming： one which has not yet been realized, but which is also rendered impossible either through the character＇s death or return to health. Examining Lu Xun＇s works in this way not only recognizes his major emphasis on social critique, but suggests both that his thought on Chinese society pierces through to the level of metaphysical inquiry, and that the relationship between human and animal marks a productive entry point for this sort of questioning.

关键词： Lu Xun animality Agamben metaphysics Kong Yiji Xianglin Sao Madman

Modeling endodermal organ development and diseases using human pluripotent stem cell-derived organoids

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Journal of Molecular Cell Biology 2020年第8期12卷 580-592页

作者： Fong Cheng Pan todd Evans Shuibing Chen Department of Surgery Weill Cornell Medical CollegeNew YorkNY 10065USA

Recent advances in development of protocols for directed differentiation from human pluripotent stem cells(hPSCs)to defined lineages,in combination with 3D organoid technology,have facilitated the generation of various endoderm-derived organoids for in vitro modeling of human gastrointestinal development and associated *** this review,we discuss current state-ofthe-art strategies for generating hPSC-derived endodermal organoids including stomach,liver,pancreatic,small intestine,and colonic *** also review the advantages of using this system to model various human diseases and evaluate the shortcomings of this ***,we emphasize how other technologies,such as genome editing and bioengineering,can be incorporated into the 3D hPSC-organoid models to generate even more robust and powerful platforms for understanding human organ development and disease modeling.

关键词： human pluripotent stem cells endoderm gastrointestinal development disease modeling

WANG Anyi ＆ todd Foley （Translator）I Love Bill （Excerpt）

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Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2018年第1期12卷 43-65页

作者： todd Foley Departments of East Asian Studies & Comparative Literature New York University NewYork NY 10003 USA

A cypress tree appeared among the gently rolling hills ahead. It remained within her field of vision for a long timer for a while to the left, then to the right. Everything else was covered in short fields of tea, without a single person visible. The sky was vast, with a few clouds. As the bus rumbled down the dirt road, Ah San looked at the cypress tree through the bars on the window and thought to herself： Actually, it all began with her love for Bill.

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WANG Anyi ＆ todd Foley （Translator）Mother

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Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2018年第1期12卷 5-19页

作者： todd Foley Departments of East Asian Studies & Comparative Literature New York University NewYork NY 10003 USA

Mother had arrived. She showed up wearing an immaculate black coat just as clean and smooth as her evenly combed hair, and carrying with her a load of fried pancakes, dried shrimp, jellyfish, and pickles. But her comp...

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