摘要:
A high viscosity liquid is fed into a rotation pack bed at a position with a distance far enough from a rotation axis, creating a centrifugal force exerted on the high viscosity liquid overwhelming a drag thereof, so that it can flow radially through the rotation pack bed. A high pressure gas is introduced into the rotation pack bed peripherally and/or a suction force source is connected to a position near the rotation axis, so that a volatile component contained in the high viscosity fluid is entrained in the gas counter currently flowing through the rotation pack bed and withdrawn from the position near the rotation axis, or the volatile component exits from the position near the rotation axis in gas phase, and thus the volatile component is removed from the high viscosity liquid. A second fluid can also be fed into the rotation pack bed to react with the high viscosity liquid, so that a reaction product is formed, and a volatile side product is removed at the same time.
摘要:
A method is used to remove an unreacted alcohol from an ester product mixture by a gas stripping. The method involves the feeding of the ester product mixture into proximity of an axis of a rotating packed bed, so as to enable the ester product mixture to flow radially to come in contact with a gas which is introduced into the rotating packed bed. The unreacted alcohol and any other volatile component of low molecular weight are thus stripped from the ester product mixture by the gas entrainment, thereby resulting in production of a purified ester product which is collected at the bottom of the rotating packed bed. The unreacted alcohol and the volatile component, which are entrained in the gas, are discharged via an exit located at the top of the rotating packed bed.
摘要:
Presented are systems and methods that perform noninvasive glucose monitoring using mid-infrared self-emission of the human body that acts as a background radiation emitter. Various embodiments accomplish this by taking advantage of the guided-mode resonance (GMR) effect in a number of bandpass filters that are constructed as an array of coplanar filters. The filter array acts as a spectral separator that uses a grating layer and a thin film waveguide to form reflection and transmission filters for particular wavelengths. Unlike, common multi-layer optical filter designs that utilize numerous individual optical filters, a novel GMR filter design comprises an array of filters that may be fabricated from CMOS-compatible materials using only a few thin film and grating layers to filter light. Advantageously, this reduces manufacturing cost and allows for simultaneous monitoring of a number of wavelengths of the glucose spectrum.
摘要:
The present invention provides methods of producing L-lysine at a high yield using an Escherichia bacterium, especially E. coli, comprising a wild type or variant dapA gene of B. subtilis. The invention also provides related recombinant Escherichia bacteria, especially E. coli, for use to produce L-lysine.
摘要:
A vertical and a horizontal vacuum sublimation apparatus with high efficiency and processes thereof are provided, especially for the materials having high melting point and low vapor pressure. The vertical sublimation purification apparatus comprises a sublimation channel body, a material rack, a heating evaporation device, a condensation device, an incubating device and a product scratching device. The horizontal sublimation purification apparatus comprises a sublimation channel body, a material carrier, a heating evaporation device and two end pipes. The apparatuses of the present invention can be applied on high purity chemicals from mass production, and are capable of sublimating and purifying OLED illumination layer materials including ALq3, NPB and CuPc, which have high melting temperature and low vapor pressure.
摘要:
A low voltage triggering silicon controlled rectifier (LVTSCR) is disclosed. The LVTSCR utilizes an added resistor disposed in a second doped region between the anode of the LVTSCR and the emitter of the parasitical bipolar PNP transistor to increase the holding voltage thereof when the LVTSCR is triggered. The LVTSCR includes a semiconductor substrate with a first conductive type and a gate. The semiconductor substrate includes a first doped region with a second conductive type, a second doped region with the first conductive type, a third doped region with the second conductive type, a fourth doped region with the second conductive type and a fifth doped region with the first conductive type. The gate is applied with a lower triggering voltage to trigger the LVTSCR.
摘要:
Disclosed is a process for preparing Li.sub.2 O--Al.sub.2 O.sub.3 --SiO.sub.2 ceramic sintered bodies. Lithium fluoride powder is added to a calcined Li.sub.2 O--Al.sub.2 O.sub.3 --SiO.sub.2 powder prepared by sol-gel process as sintering agent. The resulting powder mixture is compressed into a molded article and sintered at a temperature of 950.degree.-1250.degree. C. to obtain the sintered bodies of the invention. The sintered bodies according to the present invention have a relative density of 97.9% and a thermal expansion coefficient of 10.sup.-7 /.degree.C. magnitude.
摘要:
Embodiments of the present disclosure take advantage of a modified Predicted Heat Strain Model (PHSM) and heat balance equation to accurately determine a calorie expenditure. In various embodiments this is accomplished by using a novel sensor system to gather sensor data comprising a sweat rate and ambient conditions and applying the sensor data to a modified PHSM that distinguishes between normal cases and extreme cases in which body heat can and cannot be efficiently dissipated through sweating. By using a dual method to calculate metabolic rate based on these conditions, the PHSM allows to accurately determine a calorie expenditure.
摘要:
A cloud-based system executes a rich Internet application such as a Flash application and compresses its video stream output. A player executes a rich Internet application and produces frames of a video stream according to the rich Internet application and inputs received from a remote user. An analyzer predicts a frame being generated by the rich Internet application player, based on prior frames and prior user inputs. It also generates a set of side information comprising motion compensation data. A combiner combines the side information with a previously encoded frame to produce a reference frame. A comparator generates a residual frame from a comparison of the reference frame with the frame generated by the player. A compressor compresses the residual frame using standard compression techniques. An Internet transmitter transmits the compressed residual frame to the remote user using a UDP connection and transmits the side information using a TCP connection.
摘要:
Various embodiments of the invention provide systems and methods for low-cost, low-power Array Waveguide Grating (AWG)-based miniaturized Raman spectroscopy for use in non-invasive glucose monitoring systems, such as in wearable devices that require no replenishment of chemicals or enzymes. The AWG may be manufactured using VLSI processing technology, which significantly reduces manufacturing cost and replaces holographic grating as the dispersive component of light. In embodiments, the AWG is integrated with a number of PIN photodiode detectors on a substrate to further reduce cost and signal loss. In embodiments, a prism-coupling method eliminates alignment problems associated with traditional approaches that utilize fiber-coupling methods.