Zhundong coalfield is one of the superhuge coalfields newly discovered in Xinjiang Autonomous Region China. While many studies on alkali metals coal/biomass have been reported previously, few efforts were conducted coals which are characterized by a high content sodium. It challenging to explore ash deposition problems related directly using existing findings behavior metals. The occurrence mode and transformation during thermal conversion could be quite different. Specific investigation...

Abstract An articulated pipeline walking robot is proposed, which a that can walk on the outer surface of with turning transition and certain climbing ability replace traditional method to improve efficiency inspection maintenance reduce safety risk manual work. The gait outside pipe studied. traveling mode for horizontal pipes, L-type T-type pipes other systems analyzed. robot’s analyzed using D-H coordinate method, shows proposed design feasible.

Zhundong coal has attracted an increasing concern due to its super huge reserve but high content of alkali metals. Oxy-fuel combustion benefits the near-zero emission pollutants in coal-fired power plants and promotes large-scale utilization high-alkali coal. However, few efforts if any have been conducted on oxy-fuel The previous studies related were mainly focused sodium behaviors little work performed calcium iron, while iron are very likely generate significant influences fouling...

With the increasing complexity of network, current network traffic has strong nonlinearity and burstiness. Therefore, traditional prediction model is no longer applicable. The neural model, especially LSTM, can well fit time-series data preserve information memory past. However, as for periodicity long-term span data, does not perform well. Based on this, this paper proposes LTS-TP (Long-Term Span Traffic Prediction model), a to solve problem. First, decomposes collected using improved STL...

A novel full D-band (110-170 GHz) multi-mode transconductance down-converter mixer is realized in a 250-nm indium-phosphide double heterojunction bipolar transistor technology. single-balanced topology chosen and an active power combiner for the RF local oscillator (LO) signals' combination used. The designed feasible to work at × 1, 2, 3, 4 subharmonically LO-pumped mixing modes with relatively low LO powers of 0, -1, 5, 6 dBm, respectively. measured conversion gain achieves typical values...

This article presents a packaging technique for monolithic microwave integrated circuits (MMIC) demonstrated in fully receiver (Rx) module at the D-band (110-170 GHz). The solution consists of an MMIC-to-waveguide transition realized using on-chip probe mounted E-plane split-block waveguide module. An artificial magnetic conductor structure is implemented to suppress cavity modes and achieve better coupling from probe. transition's performance experimentally verified back-to-back test chip,...

This paper presents the design and characterization of two resistive mixers integrated with a double-slot antenna in 100-nm GaAs mHEMT technology. With RF frequency varying from 185 to 202 GHz, typical conversion loss ( <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">L c</i> ) 8.0 dB is measured for single-ended mixer 12.2 obtained one IF outputs single-balanced mixer. Each mounted on an Si lens. Incorporating gain mixer, receiver 15.4 achieved...

Sub-Harmonic resistive HEMT based mixers in Gband have been designed and integrated with Double Slot Antenna Differential Configuration for the first time. This novel topology shows compact integration of active devices between antenna ports while achieving 25 GHz bandwidth around 200 GHz. The dual-gate 50nm x 15um InP used design achieves conversion loss 15 dB +3 dBm LO power drive. Furthermore, a similar when as Harmonic mixer using single gate device offers 16.5 +4 power. For integration,...

Low-low temperature flue gas system which also called MHI high efficiency developed by Mitsubishi Corporation has gained comprehensive attention in Japan, European countries and American. However, the applications of this China are facing several sever problems about corrosion ash fouling. This paper focuses on adsorption characteristics sulfuric acid mist fly during cooling process exchanger before electrostatic precipitator. The experimental results indicate that there is an optimum for...

In order to develop suitable low-low temperature flue gas system for China and determine its operation parameters, the adsorption characteristics of ash particles sulfuric acid mist need be investigated, as well adhesion after adsorption. this paper, experiments were conducted on a laboratory-scale fixed bed reaction system. The characteristic curves different particle sizes obtained. results show that has larger influence process compared with size. And there exists an limit in process....

In China, low–low-temperature flue gas treatment systems (LLTSs) have been widely applied in power plants because of their high efficiency and low cost. However, the improper parameter design for this system has caused insufficient adsorption H2SO4 mist excessive agglomeration particles, which eventually lead to corrosion ash deposition problems. This paper tried study characteristics particles optimize LLTSs solve above The results showed that process could be divided into a rapid stage...

Abstract Low temperature corrosion is one of the key issues in application low-low electrostatic precipitator. The concentration SO 3 affects acid dew point flue gas. exhaust after air preheater should be higher than temperature. residual heat gas fully utilized by low-temperature economizer. efficiency precipitator improved comprehensive effect condensation on surface fine particles, decrease specific resistance particles and agglomeration particles.

For linear multi-pixel imaging systems, a stack of pixels comprising an antenna and heterodyne receiver are needed. Such can be realized using MMIC processes. The main constraint for such system is compact array giving high coupling to quasi-optics used focusing. This paper addresses this trade-off presents novel solution based on beam synthesis two consecutive subarrays. One sub-array along with described as half-pixel in it 2×4 patch Gilbert core sub-harmonic mixer 250nm DHBT process. has...

The phase field simulation of interface movement and interdiffusion microstructure in a binary diffusion couples was developed. with nonequilibrium concentration for single or two-phase including the temperature mobility effects were studied. It’s shown that atoms direction determined by magnitude relative difference between initial equilibrium concentration, distance flux increases as increasing, large makes particles coarsening faster.

Microstructure formation under the applied strain for alloys with different shear modulus and anisotropy were studied using phase-field simulation. The uniaxial morphology depends on magnitude of strain, ratio between precipitates matrix. However, orientation not only sign direction but also simulation results are helpful materials microstructure design control by combination internal elastic stress strain.

A 110-170 GHz transceiver is designed and fabricated in a 130 nm SiGe BiCMOS technology. The operates as an amplifier for transmitting simultaneously fundamental mixer receiving. In measured frequency range of 120-160 GHz, typical output power 0 dBm obtained with input +3 dBm. As mixer, conversion gain -9 dB at LO, noise figure 19 achieved. successfully demonstrated FMCW radar front-end distance measurement. With chirp rate 1.6&times;10¹² Hz/s bandwidth 14.4 resolution 2.8 cm...

In order to realize the integrated terahertz imaging detector, on-chip Schottky barrier diodes and lens antennas are studied in this paper. diode with cut-off frequency of 800 GHz was manufactured by polysilicon gate separation technology SMIC 180 nm process. A conic extension is used for optimizing spherical aberration lenses. The principle explained ray-tracing theory, its model simulated, optimized fabricated nylon. detector composed a antenna diodes. assembled tested at 220GHz, whose...