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Lei Wang

Bio: Lei Wang is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Precipitation & Medicine. The author has an hindex of 50, co-authored 429 publications receiving 9543 citations. Previous affiliations of Lei Wang include Taizhou University & Peking University.


Papers
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He-Ping Ying1, Lei Wang1, Jiu Zhang1, Minqiang Jiang1, Jun Hu1 
TL;DR: In this paper, the critical scaling and universality of spin models on a two-dimensional triangular lattice were investigated by using a Monte Carlo simulation, focusing on the dynamic evolutions from fully ordered initial states to show that universal scaling exists already in the short time regime in forms of power-law behavior of the magnetizations and Binder cumulant.
Abstract: The critical scaling and universality in the short-time dynamics for spin models on a two-dimensional triangular lattice are investigated by using a Monte Carlo simulation. Emphasis is placed on the dynamic evolutions from fully ordered initial states to show that universal scaling exists already in the short-time regime in forms of power-law behavior of the magnetizations and Binder cumulant. The results estimated for the dynamic and static critical exponents, θ, z, β and ν, confirm explicitly that the Potts models on the triangular lattice and square lattice belong to the same universality classes. Our critical scaling analysis strongly suggests that the simulation for the dynamic relaxations can be used to determine the universality.

7 citations

Journal ArticleDOI
TL;DR: In this paper, a reconfigurable model for N × N non-blocking optical switch matrix (OSM) constituted by N(N-1)/2 2 × 2 thermo-optic polymer/silica hybrid total-internal-reflection switch elements is presented.
Abstract: We present a reconfigurable model for N × N non-blocking optical switch matrix (OSM) constituted by N(N-1)/2 2 × 2 thermo-optic polymer/silica hybrid total-internal-reflection switch elements. The number of the elements in the general model is reduced by about 50% compared to the reported all nonblocking OSM, in addition, the proposed model is more compact in footprint and more power-efficient. Each element consists of crossed multimode polymer/silica hybrid waveguides and a heater electrode at the switching node. A switching power of 53.9 mW is required at 1550-nm wavelength to drop the crosstalk below -28.0 dB. Measurements result in a rise time of 421.5/410.1 μs (O1/O2), a fall time of 534.2/464.6 μs (O1 /O2), and crosstalk of -27.6 and -29.1 dB under cross state and bar state, respectively. Subtracting coupling losses, propagation losses of the device under cross state and bar state are about 1.0 and 1.8 dB, respectively. The fabricated 3 × 3 and 4 × 4 reconfigurable non-blocking OSMs using three and six switch elements at sizes of 16.0 mm × 6.8 mm and 26.0 mm × 6.8 mm all show excellent switching performances, and the insertion losses are less than 3.6 and 7.2 dB, respectively.

7 citations

Journal ArticleDOI
C. Xu, Z.Q. Yang, S.Q. Yang, Lei Wang, M.T. Wang 
TL;DR: In this article, the effects of high humidity on the growth and photosynthetic and physiology traits of tomato plants under high temperature stress (HT) were investigated, and the results showed that high humidity effectively alleviated the limitation of HT on plant growth and increased the root-to-shoot ratio.
Abstract: This study investigated the effects of high humidity on the growth and photosynthetic and physiology traits of tomato plants under high temperature stress (HT). The results showed that high humidity effectively alleviated the limitation of HT on plant growth and increased the root-to-shoot ratio. In addition, high humidity also increased the chlorophyll content, net photosynthetic rate, and maximum photochemical quantum yield of PSII in tomato seedlings under HT stress, but declined the stomatal limitation value. Moreover, JIP-test showed that increasing air humidity improved the quantum yields and efficiencies of HT-stressed tomato plants and increased the size of functional antenna, while reduced the activity of a portion of reaction centers. Besides, high humidity increased the activity of antioxidant enzymes, but decreased the content of malondialdehyde and hydrogen peroxide in HT-stressed tomato plants. Therefore, high humidity improved the growth and alleviated photoinhibition and oxidative stress of tomato seedlings under heat stress.

7 citations

Journal ArticleDOI
TL;DR: The encouraging results on typical reaction processes clearly imply that the proposed method achieves the coordination of reaction mechanism and operation parameters, reduces the computing complex and load, and successfully finds the optimal operation conditions that will maximize the conversion efficiency of solar energy to hydrogen energy.

7 citations

Journal ArticleDOI
TL;DR: In this paper, a novel and effective method for the synthesis of spirolactones from readily available α-keto acids and 1,3-enynes is developed via a BF3·Et2O-promoted cascade annulation.

7 citations


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5,680 citations

Journal Article
TL;DR: In this article, the authors present a document, redatto, voted and pubblicato by the Ipcc -Comitato intergovernativo sui cambiamenti climatici - illustra la sintesi delle ricerche svolte su questo tema rilevante.
Abstract: Cause, conseguenze e strategie di mitigazione Proponiamo il primo di una serie di articoli in cui affronteremo l’attuale problema dei mutamenti climatici. Presentiamo il documento redatto, votato e pubblicato dall’Ipcc - Comitato intergovernativo sui cambiamenti climatici - che illustra la sintesi delle ricerche svolte su questo tema rilevante.

4,187 citations

01 Jan 1989
TL;DR: In this article, a two-dimensional version of the Pennsylvania State University mesoscale model has been applied to Winter Monsoon Experiment data in order to simulate the diurnally occurring convection observed over the South China Sea.
Abstract: Abstract A two-dimensional version of the Pennsylvania State University mesoscale model has been applied to Winter Monsoon Experiment data in order to simulate the diurnally occurring convection observed over the South China Sea. The domain includes a representation of part of Borneo as well as the sea so that the model can simulate the initiation of convection. Also included in the model are parameterizations of mesoscale ice phase and moisture processes and longwave and shortwave radiation with a diurnal cycle. This allows use of the model to test the relative importance of various heating mechanisms to the stratiform cloud deck, which typically occupies several hundred kilometers of the domain. Frank and Cohen's cumulus parameterization scheme is employed to represent vital unresolved vertical transports in the convective area. The major conclusions are: Ice phase processes are important in determining the level of maximum large-scale heating and vertical motion because there is a strong anvil componen...

3,813 citations

Journal ArticleDOI
TL;DR: The progress in the research and development of CQDs is reviewed with an emphasis on their synthesis, functionalization and technical applications along with some discussion on challenges and perspectives in this exciting and promising field.
Abstract: Fluorescent carbon nanoparticles or carbon quantum dots (CQDs) are a new class of carbon nanomaterials that have emerged recently and have garnered much interest as potential competitors to conventional semiconductor quantum dots. In addition to their comparable optical properties, CQDs have the desired advantages of low toxicity, environmental friendliness low cost and simple synthetic routes. Moreover, surface passivation and functionalization of CQDs allow for the control of their physicochemical properties. Since their discovery, CQDs have found many applications in the fields of chemical sensing, biosensing, bioimaging, nanomedicine, photocatalysis and electrocatalysis. This article reviews the progress in the research and development of CQDs with an emphasis on their synthesis, functionalization and technical applications along with some discussion on challenges and perspectives in this exciting and promising field.

3,514 citations