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Molecular Plant 2017年第7期10卷 909-911页

作者： Yunming Zhang Michael lenhard University of Potsdam Institute for Biochemistry and Biology Karl-Liebknecht- Strasse 24-25 D-14476 Potsdam-Golm Germany

The species-specific sizes of plant lateral organs, such as leaves and petals, and those of seeds are tightly controlled by genetic networks and can only be modified within certain limits by environmental influences （Czesnick and lenhard, 2015）. After their initiation at the shoot apical meristem, leaves undergo two main phases of growth. Initially, leaf primordia grow almost exclusively by cell proliferation, reflecting a broadly active leaf meristern （Alvarez et al., 2016）.

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Lattice approaches to packed column simulations

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Particuology 2008年第6期6卷 404-411页

作者： richard Caulkin Mike Fairweather richard A. Williams Institute of Particle Science and Engineering School of ProcessEnvironmental and Materials EngineeringUniversity of Leeds

This work presents a review of the findings into the ability of a digitally based particle packing algorithm, called DigiPac, to predict bed structure in a variety of packed columns, for a range of generic pellet shapes frequently used in the chemical and process engineering industries. Resulting macroscopic properties are compared with experimental data derived from both invasive and non-destructive measurement techniques. Additionally, fluid velocity distributions, through samples of the resulting bed structures, are analysed using lattice Boltzmann method （LBM） simulations and are compared against experimental data from the literature.

关键词： Packing algorithm Bed structure Packed columns Macroscopic properties Lattice Boltzmann simulations

Expected adult lifespan in tropical trees: Long-term matrix demography in a large plot

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Forest Ecosystems 2022年第4期9卷 558-566页

作者： richard Condit Morton Arboretum 4100 Illinois Rte.53LisleIL60532USA Institute for Marine Sciences University of CaliforniaSanta CruzUSA

Background: Documenting the entire lifetime of long-lived organisms requires splicing together short-term observations. Matrix demography provides a tool to calculate lifetime statistics, but large samples from juvenile to adult are needed, and few such studies have been done in tropical trees because high species diversity limits sample sizes. The 50-ha plot at Barro Colorado in Panama was designed to provide large samples, and with 30years of censuses, accurate population matrices can be ***: In 31 abundant species, I divided all individuals≥1 cm dbh into 4 or 5 size class in each of seven censuses. Movements of stems between size classes over two censuses are termed transitions, and I constructed complete transition matrices for each species. From the matrices, I derived analytic solutions for lifetime demographic statistics. Expected adult lifespan from the sapling stage was the key ***: Expected adult lifespan from the sapling stage varied 100-fold over the 31 species, from 0.5 to 50 years,and maturation time varied from 19 to nearly 200 years. Species with the highest growth rates also had high death rates, and theoretical calculations of reproductive lifespan show that the fast-growing pioneer species have short expected adult lifespans relative to the average slow-growing, shade-tolerant species. Within the slowgrowth category, however, there was high variation in expected adult lifespan, and several shade-tolerant species under-performed the pioneers in terms of adult ***: Analytical solutions from population matrices allow theoretical analyses that integrate short-term growth records into lifespans of tropical trees. The analyses suggest that pioneer species must reproduce more successfully than shade-tolerant species to persist in the Barro Colorado forest. My next goal is to incorporate seed production and germination into lifetime matrix demography to test this hypothesis.

关键词： Tree lifespan Tropical tree Matrix demography

Consumptive Hypothyroidism: T3 or Not T3, That Is the Question

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Open Journal of Endocrine and Metabolic Diseases 2021年第10期11卷 165-169页

作者： Kevin Hess Soraya Bascoy James lenhard Department of Internal Medicine Christiana Care Newark USA Department of Endocrinology Christiana Care Newark USA

Consumptive hypothyroidism is often the clinical condition that results from neoplasms producing their own selenodionases that convert T4 needed to be converted to active T3 into an active form of thyroid hormone, rT3. This often requires treatment with high doses of IV T4, with or without doses of T3 as well, until the neoplasm is treated. This principle is demonstrated in the below case of a 65 y/o female with medical history significant for Ia Kappa multiple myeloma, complete heart block s/p AICD placement, and papillary thyroid cancer status post thyroidectomy in 2020, who had initially presented with persistent bone pain, progressive encephalopathy and failure to thrive with more than a 50 lb weight loss over a few months. Labs on presentation were not remarkable for progression of her underlying multiple myeloma, however, she was found to have a new significantly elevated TSH. She underwent imaging with a CT chest, abdomen, and pelvis, which showed new hepatic lesions, subcutaneous nodules, and new pulmonary nodules with associated lymphadenopathy and a left-sided pleural effusion. CT-guided liver biopsy evinced a metastatic neuroendocrine carcinoma, further supported by an elevated calcitonin and chromogranin. She was treated with high dose IV T4 at 1.38 mcg/kg however continued to worsening thyroid function labs. She was then started on Liothyronine at 20 mcg and subsequently improved. This patient’s case illustrates the importance of considering consumptive hypothyroidism when thyroid profile abnormalities and symptoms of severe hypothyroidism are seen in the context of malignant neoplasms, and further illustrates the important of considering T3 as part of the treatment regimen when IV T4 is not resulting in improvement.

关键词： Hypothyroidism Consumptive Hypothyroidism Neuroendocrine Tumors

Bound and Resonating Multiquark Configurations

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Chinese Physics Letters 2024年第8期41卷 8-12页

作者： Jean-Marc richard Institut de Physique des 2 Infinis de Lyon Université Claude Bernard(Lyon 1) CNRS-IN2P34 rue Enrico Fermi69622 VilleurbanneFrance

We review the predictions of quark models for multiquark configurations that are bound or resonant states,and compare different methods for estimating the properties of resonances.

关键词： quark Configuration resonant

CONTROLLING ROBOT MANIPULATORS BY DYNAMIC PROGRAMMING

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Acta Mechanica Sinica 1995年第1期11卷 20-33页

作者： MarcJ.richard Department

A certain number of considerations should be taken into account in the dynamic control of robot manipulators as highly complex non-linear *** this article,we provide a detailed presentation of the mechanical and electrical impli- cations of robots equipped with DC motor *** model takes into account all non-linear aspects of the ***,we develop computational algorithms for optimal control based on dynamic *** robot's trajectory must be predefined,but performance criteria and constraints applying to the system are not limited and we may adapt them freely to the robot and the task being *** an example,a manipulator arm with 3 degrees of freedom is analyzed.

关键词： dynamic programming robot manipulators optimal control dynamic modelling method

Large scale manufacture of magnetic polymer particles using membranes and microfluidic devices

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China Particuology 2007年第1期5卷 26-42页

作者： richard A. Williams Institute of Particle Science and Engineering School of Process Environmental and Materials Engineering University of Leeds Clarendon Road Leeds LS2 9JT United Kingdom

Magnetic polymer particles have found applications in diverse areas such as biomedical treatments, diagnosis and separation technology. These applications require the particles to have controlled sizes and narrow size distributions to gain better control and reproducibility in use. This paper reviews recent developments in the preparation of magnetic polymer particles at nano- and micro-scales by encapsulating magnetic components with dissolved or in situ formed polymers. Particle manufacture using emulsification and embedment methods produces magnetic polymer particles at micro-scale dimensions. However, the production of particles in this range using conventional emulsification methods affords very limited control over particle sizes and polydispersity. We report on alternative routes using membrane and microfluidics emulsification techniques, which have a capability to produce monodisperse emulsions and polymer microspheres （with coefficients of variation of less than 10%） in the range from submicrometer to a few 100 μm. The performance of these manufacturing methods is assessed with a view to future applications.

关键词： Magnetic polymer particles Membrane emulsification Microfluidics emulsification Large scale manufacture

Optimal chunk caching in network coding-based qualitative communication

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Digital Communications and Networks 2022年第1期8卷 44-50页

作者： Lijun Dong richard Li Futurewei Technologies Inc. 2330 Central ExpresswaySanta Clara95050USA

Network processing in the current Internet is at the entirety of the data packet,which is problematic when encountering network *** newly proposed Internet service named Qualitative Communication changes the network processing paradigm to an even finer granularity,namely chunk level,which obsoletes many existing networking policies and schemes,especially the caching algorithms and cache replacement policies that have been extensively explored in Web Caching,Content Delivery Networks(CDN)or Information-Centric Networks(ICN).This paper outlines all the new factors that are brought by random linear network coding-based Qualitative Communication and proves the importance and necessity of considering them.A novel metric is proposed by taking these new factors into *** optimization problem is formulated to maximize the metric value of all retained chunks in the local storage of network nodes under the constraint of storage limit.A cache replacement scheme that obtains the optimal result in a recursive manner is proposed *** the help of the introduced intelligent cache replacement algorithm,the performance evaluations show remarkably reduced end-to-end latency compared to the existing schemes in various network scenarios.

关键词： Internet Qualitative communication New IP Chunk caching Random linear network coding End-to-end latency Cache replacement policy Degree of freedom Distance Packet size

Optimal orientations of discrete global grids and the Poles of Inaccessibility

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International Journal of Digital Earth 2020年第7期13卷 803-816页

作者： richard Barnes Energy&Resources Group BerkeleyUSA Electrical Engineering&Comptuer Science BerkeleyUSA

Spatial analyses involving binning often require that every bin have the same area,but this is impossible using a rectangular grid laid over the Earth or over any projection of the *** global grids use hexagons,triangles,and diamonds to overcome this issue,overlaying the Earth with equally-sized *** discrete global grids are formed by tiling the faces of a ***,the orientations of these polyhedra have been chosen to satisfy only simple criteria such as equatorial symmetry or minimizing the number of vertices intersecting ***,projection distortion and singularities in discrete global grids mean that such simple orientations may not be sufficient for all use ***,I present an algorithm for finding suitable orientations;this involves solving a nonconvex optimization *** a side-effect of this study I show that Fuller’s Dymaxion map corresponds closely to one of the optimal orientations I find.I also give new high-accuracy calculations of the Poles of Inaccessibility,which show that Point Nemo,the Oceanic Pole of Inaccessibility,is 15 km farther from land than previously recognized.

关键词： Discrete grid geographic information system(GIS) geoinformatics supercomputer projections spatial statistics