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A New Chinese Anurognathid Pterosaur and the Evolution of Pterosaurian Tail lengths

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Acta Geologica Sinica(English Edition) 2012年第6期86卷 1317-1325页

作者： lÜ Junchang David w.E.HONE Institute of Geology Chinese Academy of Geological Sciences School of Biology and Environmental Sciences University College Dublin

A new anurognathid pterosaur specimen from the Middle Jurassic Tiaojishan Formation of Qinglong, northern Hebie Province is described. The new specimen is referred to Dendrorhynchoides, based on the general morphology of the skeleton, but it represents a new species, named here as Dendrorhynchoides mutoudengensis sp. nov.. It is characterized by the presence of short, robust and straight teeth, and bearing wing metacarpal approximately 40% of the length of humerus. The new specimen provides further osteological information for anurognathid pterosaurs, especially the presence of a relatively elongate tail.

关键词： Pterosauria rhamphothynchoids anurognathid Dendrorhynchoides mutoudengensis,pterodactyloids tail evolution.

ElECTROCHEMICAl INVESTIGATION ON CARBON NANOTUBE FIlM wITH DIFFERENT PRETREATMENTS

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Acta Metallurgica Sinica(English letters) 2003年第4期16卷 295-301页

作者： C.G.Hu w.l.wang w.Zhu DepartmentofAppliedPhysics ChongqingUniversityChongaing400044China KeylaboftheEducationMinistryforPhotoelectricTechnologyandSystem ChongqingUniversityChongqing400044China DepartmentofChemistry ChongqingUniversityChongqing400044ChinaManuscriptreceived25November2002

wide potential windows were found at carbon nanotube film electrodes in neutral solutions after being treated with nitric acid and mixed acid. Electrochemical reversibility was investigated at carbon nanotube films with different pretreatments for ferri/ferrocyanide and quinone /hydroquinone. Carbon nanotube film electrodes presented quasi-reversible electrochemical behavior for both electrolytes. In the range of scan rate, carbon nanotube film electrodes treated with acids showed heterogeneous electron-transfer properties, which was mainly controlled by its electron state density on the surface of the film. On the whole, the carbon nanotube electrode with nitric acid treatment presented the best electrochemical behaviors, so we chose it as an analytical electrode to determine the trace compound in dilute solution. The results demonstrated that this new electrode material exhibits superior performance characteristics for the detection of azide anion.

关键词： carbon nanotubes cyclic voltammetry treatment azide anion

Surface diffusivity of atomic deuterium on Ni_3(Al, Ti)(110) surface with and without boron

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中国有色金属学会会刊：英文版 2002年第4期12卷 649-652页

作者： J.l.wang Y.w.Chung DepartmentofMaterialsScienceandEngineering RobertR.McCormickSchoolofEngineeringandAppliedScienceNorthwesternUniversityEvanstonIL60208USA DepartmentofMaterialsScienceandEngineering RobertR.McCormic

The electron stimulated desorption was used to measure the surface diffusivity of atomic deuterium on clean and boron modified Ni 3(Al, Ti)(110) surfaces. Boron dosing was performed using a solid state boron ion source. Earlier studies showed that boron dissociates water readily at temperatures as low as 130?K and that the resulting atomic hydrogen is bound to the surface strongly. The surface diffusion coefficient of atomic D on 0.05 monolayer boron modified surface was measured to be about 10 times smaller than that on the clean surface. This slower diffusion of atomic hydrogen may explain why boron improves the ductility of polycrystalline Ni 3Al in moist environments.

关键词：氘原子表面扩散硼 Ni3Al Ni3Ti 金属间化合物

On-chip manufacturing of synthetic proteins for point-of-care therapeutics

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Microsystems & Nanoengineering 2019年第1期5卷 571-582页

作者： Travis w.Murphy Jiayuan Sheng lynette B.Naler Xueyang Feng chang lu Department of Chemical Engineering Virginia TechBlacksburgVA 24061USA Department of Biological Systems Engineering Virginia TechBlacksburgVA 24061USA

Therapeutic proteins have recently received increasing attention because of their clinical ***,most therapeutic proteins are produced on a large scale using various cell culture ***,storing and transporting these therapeutic proteins at low temperatures makes their distribution expensive and problematic,especially for applications in remote *** this end,an emerging solution is to use point-of-care technologies that enable immediate and accessible protein production at or near the patient’s *** we present the development of“Therapeutics-On-a-Chip(TOC)”,an integrated microfluidic platform that enables point-of-care synthesis and purification of therapeutic *** used fresh and lyophilized materials for cell-free synthesis of therapeutic proteins on microfluidic chips and applied immunoprecipitation for highly efficient,on-chip protein *** first demonstrated this approach by expressing and purifying a reporter protein,green fluorescent ***,we used TOC to produce cecropin B,an antimicrobial peptide that is widely used to control biofilmassociated *** successfully synthesized and purified cecropin B at 63 ng/μl within 6 h with a 92%purity,followed by confirming its antimicrobial functionality using a growth inhibition *** TOC technology provides a new platform for point-of-care production of therapeutic proteins at a clinically relevant quantity.

关键词： potential. synthesis enable

Preliminary computation of the gap eigenmode of shear Alfvén waves on the lAPD

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Chinese Physics B 2018年第12期27卷 381-389页

作者： lei chang School of Aeronautics and Astronautics Sichuan University

Characterizing the gap eigenmode of shear Alfv′en waves(SAws) and its interaction with energetic ions is important to the success of magnetically confined fusion. Previous studies have reported an experimental observation of the spectral gap of SAw on the on large Plasma Device(lAPD)(Zhang et al. 2008 Phys. Plasmas 15 012103), a linear large plasma device(Gekelman et al. 1991 Rev. Sci. Instrum. 62 2875) possessing easier diagnostic access and lower cost compared with traditional fusion devices, and analytical theory and numerical gap eigenmode using ideal conditions(chang 2014 Ph.D Thesis at Australian National University). To guide experimental implementation, the present work models the gap eigenmode of SAws using exact lAPD parameters. A full picture of the wave field for previous experiment reveals that the previously observed spectral gap is not global but an axially local result. To form a global spectral gap, the number of magnetic mirrors has to be increased and stronger static magnetic field makes it clearer. Such a spectral gap is obtained for the magnetic field of B0(z) = 1.2 + 0.6 cos[2π(z-33.68)/3.63] with 7.74-m magnetic beach. By introducing two types of local defects(corresponding to Eθ(z0) = 0 and E’θ(z0) = 0 respectively), odd-parity and even-parity discrete eigenmodes are formed clearly inside the gap. The strength of these gap eigenmodes decreases significantly with collision frequency, which is consistent with previous studies. Parameter scans show that these gap eigenmodes can be even formed successfully for the field strength of B0(z) = 0.2 + 0.1 cos[2π(z-33.68)/3.63] and with only four magnetic mirrors, which are achievable by the lAPD at its present status. This work can serve as a strong motivation and direct reference for the experimental implementation of the gap eigenmode of SAws on the lAPD and other linear plasma devices.

关键词： gap eigenmode shear Alfvén wave lAPD number and depth of magnetic mirror linear plasma

Community detection with attributed random walk via seed replacement

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Frontiers of Computer Science 2022年第5期16卷 45-56页

作者： Yang chang Huifang MA liang chang Zhixin lI College of Computer Science and Engineering Northwest Normal UniversityLanzhou 730070China Guangxi Key lab of Multi-source Information Mining and Security Guangxi Normal UniversityGuilin 541004China Guangxi Key laboratory of Trusted Software Guilin University of Electronic TechnologyGuilin 541004China

Community detection methods based on random walks are widely adopted in various network analysis *** could capture structures and attributed information while alleviating the issues of *** random walks on plain networks have been studied before,in real-world networks,nodes are often not pure vertices,but own different characteristics,described by the rich set of data associated with *** node attributes contain plentiful information that often complements the network,and bring opportunities to the random-walk-based ***,node attributes make the node interactions more complicated and are heterogeneous with respect to topological ***,attributed community detection based on random walk is challenging as it requires joint modelling of graph structures and node *** bridge this gap,we propose a Community detection with Attributed random walk via Seed replacement(CAS).Our model is able to conquer the limitation of directly utilize the original network topology and ignore the attribute *** particular,the algorithm consists of four stages to better identify communities.(1)Select initial seed nodes in the network;(2)Capture the better-quality seed replacement path set;(3)Generate the structure-attribute interaction transition matrix and perform the colored random walk;(4)Utilize the parallel conductance to expand the *** on synthetic and real-world networks demonstrate the effectiveness of CAS.

关键词： community detection seeds colored random walk parallel conductance

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Introduction

Biomedical and Environmental Sciences 1991年第1期4卷 2-7页

作者： RONAlD w.HART lOUIS w.chang ANGElO TURTURRO FRED F.KADlUBAR DHHS/PHS/FDA National Center for Toxicological Research DHHS/PHS/FDA National Center for Toxicological ResearchDHHS/PHS/FDA National Center for Toxicological ResearchDHHS/PHS/FDA National Center for Toxicological Research Jefferson Arkansas 72079Jefferson Arkansas 72079Jefferson Arkansas 72079Jefferson Arkansas 72079

Over the past 30 years, there has been a general change of emphasis in toxicology from the traditional concerns with poisons and antidotes to understanding the chronic toxic effects associated with exposure to environmental agents. The major cause of this shift was a focusing of public interest on long-term health effects of man-made chemicals. This public awareness was motivated in part by the successes of public health sanitarians in controlling infectious diseases (with the recent exception of AIDS), which resulted in the lengthening of life expectancy in the population (Hart and Turturro, 1990). This change in emphasis has radically altered the scientific methods Used in toxicology. There are basic differences in evaluating short-term and long-term consequences of toxic exposure. Interestingly, techniques similar to those used to understand the effects of long-term toxicity are also useful in understanding aging (Hart and Turturro, 1988). Factors that contribute to these differences include the comp

关键词： awareness emphasis exposure motivated chemicals consequences evaluating Introduction altered toxicity

Stability of a Composite wave of Two Separate Strong Viscous Shock waves for 1-D Isentropic Navier-Stokes System

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Acta Mathematicae Applicatae Sinica 2023年第1期39卷 49-64页

作者： lin chang School of Mathematics and Physics Handan UniversityHandan 056006China

In this paper, the large time behavior of solutions of 1-D isentropic Navier-Stokes system is investigated. It is shown that a composite wave consisting of two viscous shock waves is stable for the Cauchy problem provided that the two waves are initially far away from each other. Moreover the strengths of two waves could be arbitrarily large.

关键词： combination of two shock waves energy estimate asymptotic stability

Comparison of Velocity Shear with Turbulence Reduction Driven by Biasing in a Simple Cylindrical Slab Plasma

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Plasma Science and Technology 2010年第4期12卷 391-396页

作者： K.w.GENTlE K.lIAO K.lEE w.l.ROwAN Institute of Fusion Studies University of Texas at Austin

In an experimental realization of the sheared cylindrical slab, the level of plasma turbulence is strongly reduced by application of a sufficient bias potential difference in the radial direction. Density fluctuation levels △nrms/n decrease by more than a factor of five. The ion flow velocity profile is measured spectroscopically from the Doppler shift of an argon ion line. Comparison of the shearing rates with the turbulent amplitudes as a function of bias show no relation between the shearing rate and turbulence reduction, contrary to expectations.

关键词： turbulence suppression shear stabilization velocity shear bias