At the angle of ldquonaturalnessrdquo deprivation urban waterfront landscapes in basins, and based on material earth waterfronts shape bank, choose plants bank hydrophilic elements, this paper analyzed researched current destruction because constructed areas landscapes, proposed four suggestions: insisted sustainable development, strengthened plan, conjectured evaluated construction, improved legislative system reinforce supervise, to provide extended practice theoretic basis.

Fabricating resonant cavities with conventional methods to improve the coupling efficiency of a detector in terahertz (THz) region is difficult for wavelength too long. Here, we propose solution by using substrate cavity effect given that and thickness preparation device are same order. The planar dipole antenna-coupled Nb5N6 microbolometers different thicknesses were fabricated. interference on optical voltage response analyzed experimentally theoretically. experimental results show...

Room-temperature thermal detection at a wavelength of 2 µm in the short-wave infrared range (1.7-3 µm) was demonstrated for first time using Nb5N6 microbolometer. The photothermal responses two types microbolometers were evaluated. By suspending microwires air above substrate, reduction conductance device by factor 39 achieved. measured optical voltage responsivity RO microbolometer reached value 61.5 V/W. A noise equivalent power 8.5 × 10-11 W/√Hz (at 1 kHz) and detectivity D* = 2.0 107...

In the field of terahertz (THz) imaging applications, using a 0.18-μm CMOS process, 1 × 16 low-noise readout integrated circuit (ROIC) is developed for 64 Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sub> N xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> microbolometer array detector. This consists digitally programmable current digital-to-analog converter and an amplifier module, which are responsible biasing amplifying its output...

A reflective grating-coupled structure on the silicon substrate was designed to improve detection efficiency of terahertz detectors for frequency ranging from 0.26 THz 0.36 THz. By using finite difference time domain (FDTD) solutions, simulation and optimized design were carried out. The results showed that signal effectively reflected diffracted by which significantly enhanced electric field in place detector. maximum can be increased 2.8 times than Fabry-Perot resonator. To verify results,...

We designed a high input impedance cryogenic radio frequency amplifier to scale up series array of superconducting nanowire single photon detectors for resolving wide range numbers. The monolithic integrated chip was fabricated by Tower Jazz's 0.18-μm SiGe BiCMOS process. Temperature dependence the main components, such as silicon germanium heterojunction bipolar transistor, proportional current source, and poly resistor, were characterized estimate quiescent point at environment. At 4.2 K,...

A modified SAW diode convolver is presented which works with backward biased diodes, so that no bias resistor needed and taps are isolated from one another. The new distribution of makes it possible for the to operate at lower frequencies enables a relatively wide bandwidth. experimental results device 28 have been given.

Free-space angular-chirp-enhanced delay (FACED) imaging is proven to offer ultrafast speed needed in a wide range of bioimaging applications. However, this superior performance critically requires stringent hardware mechanical stability, which limits it applicability for robust long-term operation. We develop FACED 2.0, that integrates diffractive optical elements with the infinity mirrors preserving capability high-density laser-scanning foci generation, and more importantly, enabling...

When an aircraft equipped with infrared guidance systems flies at high Mach numbers through the atmosphere, window interacts strongly incoming flow, resulting in aerodynamic thermal radiation effects. This paper models transmission for flat-panel side-window windows, captures dynamic noise images under ballistic conditions, and introduces spectral filtering techniques to mitigate intense bands sapphire addressing varying intensities across different bands. Simulation results indicate that,...

Intensive blue photoluminescence (PL) was observed at room temperature from the nanocrystalline-Si/SiO2 (nc-Si/SiO2) multilayers (MLs) obtained by thermal annealing of SiO/SiO2 MLs for first time. By controlling size nc-Si formed in SiO sublayer 3.5 to 1.5 nm, PL peak blueshifts 457 411 nm. Combining analysis TEM, Raman and absorption measurement, this paper attributes multiple luminescent centres interface SiO2.

This paper think of the car provided by company as research object, filter white noise was used to get some road roughness and create random excitation, then entity model four pillar test bench set up in ADAMS, next, add excitation carry on simulation analysis vibration response comfort level .So that, related parameters evaluate car's performance vehicle ride were get, it can provide reliable data study automobile comfort.All all, make design philosophy turn "design--experiment--improved...

We present a readout circuit for 1 &times; 64 Nb₅N₆ microbolometer array detector. The intrinsic average responsivity of the detectors in is 650 V/W, and corresponding noise equivalent power (NEP) 17 pW/&radic;Hz. Due to low detector, we design with channels. integrated (ROIC) fabricated under CMOS process 0.18&mu;m rule, which has built-in bias adjustable numerical-controlled output current. Differential structure used each pixel boost capacity resisting disturbance. A...

In order to effectively improve the coupling efficiency of terahertz (THz) detectors, we design a grating-coupled structure on high-resistivity silicon substrate for 0.2 THz 0.35 band enhance ability signals. We simulated electric field distribution in surface and inside by using finite difference time domain (FDTD) method. The central area can be enhanced more than 4 times compared with non-structure substrate. also Fabry-Perot cavity frequency range from THz, improved one addition, changed...

The electron field emission characteristics of nanocrystalline Si thin films prepared by KrF excimer laser crystallization ultrathin amorphous and subsequent thermal annealing is reported. Stable reproducible emissionbehavior can be observed for the crystallized films. turn-on electric reduced from 17V/μm as-deposited sample to 85V/μm one, current density reach as high 01mA/cm2 improvement in attributed both change film surface formation high-density Si, which induces enhancement internal...

One-dimensional periodic nanocrystalline silicon (nc-Si) arrays were fabricated by laser interference crystallization combined with one-dimensional phase shifting grating mask (PSGM). The energy density irradiated on the surface of samples different thicknesses a-Si:H can be modulated PSGM periodicity 400 nm. Raman spectra confirmed stripe-patterned area samples. transmission electron microscopic and atomic force images demonstrate that nc-Si is same as PSGM. And controlling density, a...

The leaky surface wave characteristics in SiO/sub 2//49 degrees Y-X LiNbO/sub 3/ are investigated. Within the range 0<kh<0.5 attenuation of LSW is very small, close to 0. When interdigital transducers (IDTs) interface, K/sup 2/ (the electromechanical coupling constant) will increase as kdh (film thickness normalized wavelength) increases. maximum 15%, i.e. about 1.08 times large coefficient at zero film thickness. Several TCD (temperature delay) points exist for structure. In -40 C<T<60 C,...

We designed a high input impedance RF amplifier based on Tower Jazz’s 0.18 μm SiGe BiCMOS process for series nanowire detector. The characterization of its gain and with vector network analyzer is described in detail specificity. actual 15 dB should be the measured value subtracts 6 dB, which easy to ignored. Its can equivalent 6.7 kΩ ∥ 3.4 pF though fitting measurement, whose accuracy verified. measurement provides good reference characterize similar special unmatched impedance.