Summary As a type of mono-alkyl ester, biodiesel exhibits great potential to serve as the base oil drilling fluids substituting for conventional oil-based (OBDFs). This paper presents series laboratory investigations water-in-biodiesel (invert) emulsion basis high-performance, environmentally friendly, and low-cost biodiesel-based fluid (BBDF). Biodiesel produced from waste cooking was used formulate BBDF because its high flashpoint, reliable storage stability, acceptable elastomeric...

Summary This paper presents an environmentally friendly, biodiesel-based invert-emulsion drilling fluid (BBDF). On the basis of stable emulsion previously optimized (which was presented in Part 1), several necessary additives, including organophilic clay (OC), a fluid-loss (FL) -control agent and rheological modifier (RM), were developed or selected to formulate BBDF. Numerous laboratory tests different properties conducted evaluate this fluid. BBDF has behavior filtration that meet...

GH4169 is comparatively a new superalloy mainly used as turbine components because of its outstanding combination properties such high-temperature strength, thermal stability and wear resistance. But these also make it hard to cut, machined surface quality integrity are particularly sensitive the manufacturing process employed. The existing researches on machining-induced machinability hard-to-cut materials briefly reviewed; effects processing parameters for studied in detail via...

For the chip integration of MEMS (micro-electromechanical system) safety and arming device, a miniature detonator needs to be developed reduce weight volume explosive train. A Si-based micro-detonator is designed fabricated, which meets requirement device. The firing sensitivity tested according GJB/z377A-94 test methods: Langlie. function time measured using wire probe photoelectric transducer. result shows average voltage 6.4 V when discharge capacitance electro-circuit 33 μF. And 5.48 μs....

Target detection of small samples with a complex background is always difficult in the classification remote sensing images. We propose new sample target method combining local features and convolutional neural network (LF-CNN) aim detecting numbers unevenly distributed ground object targets The k-nearest neighbor used to construct neighborhood each point neighborhoods are extracted one by from convolution layer. All aggregated maximum pooling obtain global feature representation....

Four-mode phase-sensitive (4MPS) process has been employed in a parametric mixer based wavelength multicaster, enhancing the multicasting conversion efficiency and signal-to-noise ratio. In addition, 4MPS multicaster is an outstanding candidate for all-optical regeneration, owing to its inherent capabilities clamp amplitude fluctuations by saturated effect squeeze phase distortions sensitive process. The investigation this paper focuses on operated saturation gain regime, including...

In order to reduce the ignition energy of tantalum nitride film transducer, a new type exchangers bridge area was designed in this paper, and it fabricated by MEMS technology. The parameters voltage, energy, as well action time were tested. experimental results showed that terms time, value element lower than conventional area. addition, performance can be reduced many

Stable four-mode phase-sensitive (4MPS) process was investigated as a means to enhance two-pump driven parametric multicasting conversion efficiency (CE) and signal noise ratio (SNR). Instability of multi-beam, phase sensitive (PS) device that inherently behaves an interferometer, with output subject ambient induced fluctuations, addressed theoretically experimentally. A new stabilization technique controls phases three input waves the 4MPS multicaster maximizes CE developed described....

In order to study the igniton properties of silicon ignitior, firing sensitivity test with output charge B-KNO3 were carried out, and was studied as well. The result indicates that energetic chip can ignite which burns sufficiently. 50% voltage 21.3V, standard deviation 1.87, 99.9% point 27.1V.

This study focuses on the effect of lateral mass impact ring-stiffened thin-walled cylindrical shell. Cylindrical shells were fabricated to validate numerical modeling and analytical techniques, drop tests performed using a rigid spherical indenter. Next, stiffened-ring with various structural size parameters simulated ABAQUS software. The relationships between force, deformation displacement, rebound velocity established, basis mechanics theory simulation results. It derived fitting...

We demonstrate a new linearization approach for analog parametric sampling gates. The method utilizes higher-order mixing product to suppress the quadratic distortion present in output of high-power-efficiency mixer.

We demonstrate a broadband analog parametric optical sampling gate-driven analog-todigital conversion applicable to high speed signals. A record-fast signal of 74 GHz was characterized at 5.4 ENOB for the first time.

A broadband photonic parametric sampling gate capable of capturing high frequency signals is demonstrated. The parametric-sampled ADC performance characterized with a record resolution 6.0 ENOBs at signal in excess 100 GHz.

In this paper, an insect-based flapping-wing flying microrobot was built which can successfully fly in the sky. The unsteady aerodynamics associated with studied by using method of computational fluid dynamics (CFD). On basis numerical simulation, Fluid-Structure coupling mechanics for flexible flapping-wings were and discussed. According to practically developed microrobot, a 2-D simulation model established. deformation effects on aero dynamic performance analyzed, have offered theoretical...

Micro-electro-mechanical system (MEMS) have recently seen their field of application extended to military. This is mainly due the fact that MEMS technologies present a great reduce mass, cost, power consumption, while improving reliability, performance and smartness. Application technology, micropyrotechnic igniter are produced.The principle based on integration lead styphnate (LTNR) material within igniter, which produced by with 3 micro-igniter. Each contains three parts (the chip, silicon...

We present a photonic RF-channelized receiver based on parametric multicasting and LO generation. Using frequency locking coherent detection, contiguous channelization of 12 sub-channels is achieved covering 24-30GHz. System analysis characterizations are presented.