A5101405711- Plant biochemistry and biosynthesis
- Computational Drug Discovery Methods
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Laser-Matter Interactions and Applications
- Statistical Methods and Inference
- Advanced Chemical Physics Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Optical Sensing Technologies
- Magnetism in coordination complexes
- Molecular spectroscopy and chirality
- Mass Spectrometry Techniques and Applications
- Polymer crystallization and properties
- Microfluidic and Capillary Electrophoresis Applications
- Catalysis and Oxidation Reactions
- Advanced X-ray Imaging Techniques
- Spectroscopy and Quantum Chemical Studies
- Lanthanide and Transition Metal Complexes
- DNA and Nucleic Acid Chemistry
- Molecular Sensors and Ion Detection
- Electrowetting and Microfluidic Technologies
- Nuclear Physics and Applications
- Ion-surface interactions and analysis
- Biochemical and Molecular Research
- Optical measurement and interference techniques
Beijing Institute of Technology
2020-2023
University of Nebraska–Lincoln
2023
Stanford University
2013-2023
First Hospital of Jilin University
2020
Jilin University
2020
Wayne State University
2014-2019
Southern University of Science and Technology
2019
Xiamen University
2017
Radboud University Nijmegen
2015
Beijing Normal University
2015
Molecular mechanisms by which to increase the activity of a mechanophore might provide access new chemical reactions and enhanced stress-responsive behavior in mechanochemically active polymeric materials. Here, single-molecule force spectroscopy reveals that force-induced acceleration electrocyclic ring opening gem-dichlorocyclopropanes (gDCC) is sensitive stereochemistry an α-alkene substituent on gDCC. On ∼0.1 s time scale experiment, required open E-alkene-substituted gDCC was found be...
This paper describes the break-up of droplets in a concentrated emulsion during its flow as 2D monolayer microchannel consisting narrow constriction. Analysis behavior large number drops (N > 4000) shows that break-ups increases with increasing rate, entrance angle to constriction, and size relative width As single do not break at highest rate used system, arise primarily from droplet-droplet interactions. droplet properties high temporal resolution 10 microseconds makes it possible relate...
A new time- and position-sensitive particle detection system based on a fast frame CMOS (complementary metal-oxide semiconductors) camera is developed for coincidence ion imaging. The composed of four major components: conventional microchannel plate/phosphor screen imager, camera, single anode photomultiplier tube (PMT), high-speed digitizer. collects the positional information ions from through real-time centroiding while arrival times are obtained timing signal PMT processed by Multi-hit...
There have been growing interests in droplet-based microfluidics due to its capability outperform conventional biological assays by providing various advantages, such as precise handling of liquid/cell samples, fast reaction time, and extremely high-throughput analysis/screening. The utilizes the interaction between interfacial tension fluidic shear force break continuous fluids into uniform-sized segments within a microchannel. In this paper, effect different viscosities carrier oil on...
We develop a new method to achieve slice electron imaging using conventional velocity map apparatus with two additional components: fast frame complementary metal-oxide semiconductor camera and high-speed digitizer. The setup was previously shown be capable of 3D detection coincidence measurements ions. Here, we show that when this is applied imaging, time 32 ps spatial less than 1 mm thick can achieved. Each directly extracts distributions electrons provides are impossible or difficult...
Ultrafast nuclear driven charge transfer prior to dissociation is an important process in modular systems as was demonstrated experimentally the bifunctional molecule 2-phenylethyl-N,N-dimethylamine (PENNA) work by Lehr et al. ( J. Phys. Chem. A 2005 , 109 8074 ). The ultrafast dynamics of PENNA photoexcited three lowest electronic states cation (D0, D1, and D2) studied using quantum chemistry surface hoping. We show that a conical intersection, localized Franck-Condon region, between D0 D1...
The chemical difference between DNA and RNA nucleosides is their 2′-hydrogen versus 2′-hydroxyl substituents. Modification of the ribosyl moiety at 2′-position 2′-O-methylation in particular, common among natural post-transcriptional modifications RNA. 2′-Modification may alter electronic properties hydrogen-bonding characteristics nucleoside thus lead to enhanced stabilization or malfunction. structures relative glycosidic bond stabilities protonated forms 2′-O-methylated purine...
Two fluorescent probes 1 and 2 are developed that capable of measuring two different metal ions under basic acidic conditions, respectively. These contain a fluorophore, whose forms interconvertible in solutions have the potential to measure concentration each ion mixture caesium–potassium or sodium–potassium ions, Probe molecules can also be portrayed as logic gates function combination one AND INHIBIT gate.
We report the development of a new three-dimensional (3D) momentum-imaging setup based on conventional velocity map imaging to achieve coincidence measurement photoelectrons and photo-ions. This uses only one detector (microchannel plates (MCP)/phosphor screen) but voltages electrodes are pulsed push both electrons ions toward same detector. The ion-electron is achieved using two cameras capture images separately. time-of-flight read out from MCP digitizer. demonstrate this system by...
The 2'-substituents distinguish DNA from RNA nucleosides. 2'-O-methylation occurs naturally in and plays important roles biological processes. Such 2'-modifications may alter the hydrogen-bonding interactions of nucleoside thus affect conformations an chain. Structures protonated 2'-O-methylated pyrimidine nucleosides were examined by infrared multiple photon dissociation (IRMPD) action spectroscopy, assisted electronic structure calculations. glycosidic bond stabilities nucleosides,...
An extremely long decay time of hot carriers in graphene at room temperature was observed for the first by monitoring photoinduced thermionic emission using a highly sensitive time-of-flight angle-resolved photoemission spectroscopy method. The persisted beyond 1 ns, two orders magnitude longer than previously reported carrier decay. lifetime attributed to excitation image potential states very low laser fluencies.
We study the behavior of Thompson sampling from perspective weak convergence. In regime where gaps between arm means scale as $1/\sqrt{n}$ with time horizon $n$, we show that dynamics evolve according to discrete versions SDE's and stochastic ODE's. As $n \to \infty$, converge weakly solutions corresponding Our convergence theory is developed first principles using Continuous Mapping Theorem, can be easily adapted analyze other sampling-based bandit algorithms. this regime, also limits many...
The need to estimate a function value from sample data at point that is itself estimated the same set arises in many application settings. Such applications include value-at-risk, conditional and other so-called distortion risk measures. In this note, Peter W. Glynn, Lin Fan, Michael C. Fu, Jian-Qiang Hu, Yijie Peng provide simple proof for central limit theorem such estimators, an accompanying batching/sectioning methodology can be used construct large-sample confidence intervals presence...
Much of the literature on optimal design bandit algorithms is based minimization expected regret. It well known that designs are over certain exponential families can achieve regret grows logarithmically in number arm plays, at a rate governed by Lai-Robbins lower bound. In this paper, we show when one uses such optimized designs, distribution associated necessarily has very heavy tail, specifically, truncated Cauchy distribution. Furthermore, for $p>1$, $p$'th moment much faster than...
In fringe projection profilometry, phase unwrapping has long been a critical issue. Unwrapping methods can be classified as spatial and temporal methods. The method applies only to the surface of continuous objects. is more widely used on discontinuous or isolated Nevertheless, are suffering from time-consuming, such large number pictures required (standard method, shift plus Gray code method), high algorithm complexity (such periodic encoding Fourier transform Method) Etc. Therefore, we...