Extreme Light Concentration and High Absorption of the Double Cylindrical Microcavities

We numerically study the enhancement factor of energy density and absorption efficiency inside the double cylindrical microcavities based on a triple-band metamaterial absorber. The compact single unit cell consists of concentric gold rings with a gold disk in the center and a metallic ground plane separated by a dielectric layer. We demonstrate that the multilayer structure with subwavelength electromagnetic confinement allows 104-105-fold enhancement of the electromagnetic energy density inside the double cavities and contains the most energy of the incoming light. Particularly, the enhancement factor of energy density G shows strong ability of localizing light and some regularity as the change of the thickness of the dielectric slab and dielectric constant. At the normal incidence of electromagnetic radiation, the obtained reflection spectra show that the resonance frequencies of the double microcavities operate in the range of 10-30μm. We also calculate the absorption efficiency C, which can reach 95%, 97% and 95% at corresponding frequency by optimizing the structure＇s geometry parameters. Moreover, the proposed structure will be insensitive to the polarization of the incident wave due to the symmetry of the double cylindrical microcavities. The proposed optical metamaterial is a promising candidate as absorbing elements in scientific and technical applications due to its extreme confinement, multiband absorption and polarization insensitivity.

Dielectric properties of nucleated erythrocytes as simulated by the double spherical-shell model

The dielectric properties of nucleated erythrocytes from bullfrogs were measured in a frequency range of 10 kHz–110 MHz.The complex permittivity(ε*),complex conductivity(κ*),and complex resistivity(ρ*)were analyzed and compared in the 10.63%to 37.58%haematocrit(Hct)range.The relaxation behavior,the passive electrical properties,and the cellular structure parameters,including the cell membrane,the cytoplasm,the nuclear membrane,and the nucleoplasm of the nucleated erythrocyte suspensions were investigated.The method used is based on the binomial Cole–Cole equation and the double spherical-shell physical models.Upon the elimination of the electrode polarization effect,two definite relaxations related to the interfacial polarization are observed on low-and high-frequency dispersions.The permittivity values and the characteristic frequency values differ by one order of magnitude:the low-frequency relaxation increments[?ε1=(5.63±1.43)×103]and the characteristic frequency[fc1=(297.06±14.48)kHz]derived from the cell membrane,the high-frequency relaxation increments[?ε2=(5.21±1.20)×102]and the characteristic frequency[fc2=(3.73±0.06)MHz]derived from the dielectric response to the external electric field of the nuclear membrane,respectively.Moreover,the other core dielectric parameters,such as the relative permittivity of the cell membrane[εm=(7.57±0.38)]and the nuclear envelope[εne=(23.59±4.39)],the conductivity of the cytoplasm(hemoglobin,κHb=(0.50±0.13)S/m]and the nuclear endoplasm[κnp=(2.56±0.75)S/m],and the capacitance of the bilayer membranes[Cm:(0.84±0.04)μF/cm2],and Cne:(0.52±0.10)μF/cm2]were also accurately and reliably measured.This work presents a feasible method to evaluate the dielectric parameters and the cellular structure of the erythrocytes of bullfrogs.Moreover,it paves the way for new studies on the haematology of frogs and the detection of nucleated cells via dielectric impedance spectroscopy.

The Double in Roxana： the Primitive and the Uncanny

I examine in this paper how Roxana explores the uncanny othemess of modem subjectivity, particularly through the figure of the double as a quintessential literary corollary of a narcissistic self whose problematic relation with oneself as well as the other is often represented in the form of the double. As an exquisite literary device that incarnates the repressed anxiety or fear of the self, which is often employed in Gothic or Romantic writings, the uncanny double works as a peculiar topos to belie and undermine the idea of modem subjectivity as an autonomous individual. Roxana deploys it with dexterity and power as a significant way to explore modem subjectivity. Amy largely plays the primitive double, while she also exhibits how the connotation of the double is historically altered. Susan as the uncanny double narcissism embodies Roxana＇s desire for a non-split self as well as self-fear, and her killing unavoidably leads to the suicidal destruction of Roxana herself.

The Double Projecting Neuron of the Cat Spinal Dorsal Horn——A Study with Double Retrograde Fluorescent Tracing Technique

The new double projecting neurons were found in the cat spinal dorsal horn by the double retrograde fluorescent tracing technique.Fast Blue(FB)was injected into unilateral dorsal column nucleus(DCN)of adult cats anesthetized with pentobarbital.Nuclear Yellow(NY)was injected ipsilaterally into the lateral cervical nucleus(LCN)8-9 days later.After an additional 18-30 hrs.

Double Glow Plasma Hydrogen-free Carburizing on Commercial Purity Titanium

A carburized layer with special physical and chemical properties was formed on the surface of commercial purity titanium by a double glow plasma hydrogen-free carburizing technique,High-purity netlike solid graphite was used as a raw material and commercial purity titanium was used as the substrate material.Argon gas was used as the working gas.The carburized layer can be obviously observed under a microscope.X-ray diffraction indicates that TiC phase with higher hardness and dissociate state carbon phase was formed in the carburized layer.The glow discharge spectrum（GDS） analysis shows that the carbon concentration distributes grodiently along the depth of carburized layer.The surface hardness of the substrate increases obviously.The hardness distributes gradiently from the surface to inner of carburized layer.The friction coefficient reduces by more than 1/2,the ratio wear rate decreases by above three orders of magnitude.The wear resistance of the substrate material is improved-consumedly.

CUMULATIVE RESULTS OF CHEMOSENSITIVITY TEST USING MTT ASSAY IN DOUBLE-LAYER AGAROSE

Objective To investigate cumulative results of chemosensitivity test using 3-（4,5-dimethylthiazol-2-yl）-2,5-diphenyl （MTT） assay in double-layer agarose. Methods A total of 2 491 patients with different kinds of cancers were enrolled in the study, in which 18 kinds of different anticancer drugs were used. A computer soft was used to get charts. ResultsThe total evaluability rate was 82.7% （2 060/2 491）. Among all agents, the efficiency rates of 5-Fu, MMC, DDP, BLM and CBP were higher than the efficiency rates of others. The response rate range of different cancer in vitro sensitivity by using MTT assay in double layer agarose were from 9.2% （biliary duct） to 37.5% （malignant lymphoma）. For colon and rectum cancer, 5-Fu, DDP, MMC and BLM were more sensitive than other anti-tumor agents. For breast carcinomas, ACTD and DDP were more sensitive. For gastric cancer, 5-Fu, DDP and BLM were more sensitive. For leukemia, VM-26 and HHRT were more sensitive. ACM was more sensitive to kidney and MXT and BLM were more sensitive to pancreas cancer. For Lung cancer, DDP and EPI were more sensitive. Mean true positive rate, mean true negative rate, mean sensitivity, mean specificity and mean accuracy were 44% , 92% , 72% , 77% , and 76% , respectively. Conclusion Chemosensitivity tesing using the MTT assay in a double layer agarose was a very useful reference to chem- therapy.

Study on the double transmission of ultrasonic waves through statistic rough surfaces

A model evaluating the signal loss of the double transmitted acoustic beams through random rough surfaces was established based on the Fresnel approximation and phase- screen approximation. A simple analytical solution was achieved using the exponential substi- tution approach to remove the nonlinear integral terms. The factors that affect the signal of double transmissions from random rough surfaces were analyzed. The research results demon- strated that the signal loss is not only related to the root-mean-squire height of the roughness, but also to the distance of wave traveling in the materials. The model can be very helpful for improving the reliability of NDT (Non-Destructive Testing).

The Double Ninth Festival

教学设计指导思想与理论依据《2011版课标》中指出'让学生在教师的指导下,通过感知、体验、实践、参与和合作等方式,实现任务的目标,感受成功'。《基础教育课程改革纲要》提出'要改变课程实施过于强调接受学习、死记硬背、机械训练的现状,倡导学生主动参与、乐于探究、勤于动手,培养学生搜集和处理信息的能力、获取新知识的能力、分析和解决问题的能力以及交流与合作的能力'。

Evolution of Bell-nonlocality of two cavity fields in the double Jaynes-Cummings model

The Bell-nonlocality of two initially entangled macroscopic fields in the double Jaynes-Cummings model is investigated. Moreover, the process by which detuning between the atomic transition frequency and the field frequency affects the evolution of the Beil-nonlocality of two macroscopic fields is studied. The effect of the disparitv between the two coupling strengths is discussed.

"The Double Birds Fly to the Sun" ——a Butterfly-Shaped Ivory Utensil

The primitive carving discovered at the Hemudu site of Yuyao, Zhejiang Province. first appeared on practical and sacrificial utensils. The utensil shown here is called. "The Double Birds Fly to the Sun." An exquisitely-carved piece. it was unearthed in 1977 at Hemudu. At 16.6 cm long, 5,9 cm wide and 1.2 cm thick, its base and upper section are incomplete. On the surface of the ivory, a beautiful picture is carved in intaglio lines: A pair of concentric circles in different sizes.

A Diagnostic Analysis of the Simulated Structure of a Meiyu Front System in 1999

A numerical simulation of a torrential rain event occurring in the Jiang-Huai Valley of China from 22-24 June 1999 is performed and analyzed by using the PSU/NCAR MM5 mesoscale non-hydrostatic model. The high-resolution model output data are utilized to diagnose the double front structure, and the distributions of potential temperature, equivalent potential temperature, and specific humidity in the vicinity of the Meiyu Front System （MYFS） in the Jiang-Huai Valley. The results show that both the potential temperature gradient and the specific humidity gradient have important impacts on the two strong equivalent potential temperature gradient zones associated with the double front structure of the MYFS, but the latter （moisture gradient） is more important. In addition, the tendency equation of specific humidity gradient is theoretically derived. It shows that variations of the specific humidity gradient are related to the advection, convergence/divergence, horizontal and vertical vorticities （secondary circulation） effects and the gradient of water vapor source/sink. As an example, the budget of the meridional component of the tendency equation is selected and diagnosed by using the above model simulation data of the torrential rain event. It is shown that the variation of the specific humidity gradient averaged throughout the simulation is mainly controlled by the convergence/divergence effect, the secondary circulation effect associated with the horizontal vorticities, and the water vapor source/sink effect. Since the water vapor source/sink is often formed from the phase change processes of water vapor in the air and thus directly associated with cloud and precipitation microphysics processes, the variation of the specific humidity gradient is closely related with cloud and precipitation microphysics and the distribution, development and evolution of cloud and rainfall systems. The double front structure of the MYFS provides an advantageous environmental condition for the development and movement of the mesoscale torrential rain system nearby. In turn, the development of the torrential rain exerts a signifiant impact on the MYFS through changing the thermal and moisture distributions.

Bifurcations of Limit Cycles in A Perturbed Quintic Hamiltonian System with Six Double Homoclinic Loops

This paper concerns with the number and distributions of limit cycles of a quintic subject to a seven-degree perturbation. With the aid of numeric integral computation provided by Mathematica 4.1, at least 45 limit cycles are found in the above system by applying the method of double homoclinic loops bifurcation, Hopf bifurcation and qualitative analysis. The four configurations of 45 limit cycles of the system are also shown. The results obtained are useful to the study of the weakened 16th Hilbert Problem.

A Decision Method Based on Competition Model

We propose a decision method -double scale method to derive the priority vector of finite alternatives with respect to a single criterion based on competition model. Compared with the attribute hierarchical model, the double scale method is reasonable and practical.