Abstract: A wireless sensor network includes an aggregator, a control device, a bridge device, and a mesh module. The control device is connected with the aggregator and the bridge device. The mesh module is wirelessly connected with the bridge device and the control device. A mesh network is built by the connections of the mesh module, the bridge device, and the control device. A duty cycle of the mesh module is less than or substantially equal to 10 percent. A command sent by the aggregator is converted into a wireless message by the control device, the wireless message is transmitted by the control device and retransmitted through a first amount of radios and repeated for a second amount of times by the bridge device, so that the wireless message is successfully received by the mesh module. Therefore, a mesh network with high efficiency and low cost is achieved.

Abstract: The portable multi-color fluorescence detection device includes a plurality of wells, an illumination module and a detection module. The plurality of wells configured for accommodating fluorescent mixture. The illumination module comprises at least two light sources and a color combination prism, the color combination prism being configured for combing different frequency light emitting form the at least two light sources into combination beams in parallel toward the plurality of wells for exciting the fluorescent mixture to generate fluorescent light. The detection module comprises a plurality of fiber bundles and an imaging unit, each of the fiber bundles be coupled with the corresponding well, wherein the fluorescent light is transmitted to the imaging unit through the plurality of fiber bundles and converted into an electrical signal by the imaging unit.

Abstract: A charge-based charge pump with wide output voltage range is provided. In the charge-based charge pump, the digital logic circuit is configured to receive an up pulse signal and a down pulse signal and output a plurality of switching signals for controlling the first NMOS, the positive hold subcircuit, the first dynamic body-bias generator, the positive charge transfer subcircuit, the first static body-bias generator, the first PMOS, the negative hold subcircuit, the second dynamic body-bias generator, the negative charge transfer subcircuit and the second static body-bias generator electrically connected therewith, so as to allow the output voltage to range from ?0.84·VDD to 1.82·VDD. The charge-based charge pump is triggered by the up or down pulse signal or works in a default state, and the top plate and the bottom plate of the pump capacitor are electrically connected to different node and terminal according to the plurality of switching signals.

Abstract: A low noise amplifier is provided. The low noise amplifier includes an input port, an output port, an inverter, a plurality of switched-capacitor units and a feedback inductor. The inverter is electrically connected between the input port and the output port. Each of the plural switched-capacitor units is electrically connected with the inverter in parallel and includes a switch and a capacitor connected in series. The feedback inductor is electrically connected with the inverter in parallel.

Abstract: A wireless sensor network includes an aggregator, a control device, a bridge device, and a mesh module. The control device is connected with the aggregator and the bridge device. The mesh module is wirelessly connected with the bridge device and the control device. A mesh network is built by the connections of the mesh module, the bridge device, and the control device. A duty cycle of the mesh module is less than or substantially equal to 10 percent. A command sent by the aggregator is converted into a wireless message by the control device, the wireless message is transmitted by the control device and retransmitted through a first amount of radios and repeated for a second amount of times by the bridge device, so that the wireless message is successfully received by the mesh module. Therefore, a mesh network with high efficiency and low cost is achieved.

Abstract: A low noise amplifier is provided. The low noise amplifier includes an input port, an output port, an inverter, a plurality of switched-capacitor units and a feedback inductor. The inverter is electrically connected between the input port and the output port. Each of the plural switched-capacitor units is electrically connected with the inverter in parallel and includes a switch and a capacitor connected in series. The feedback inductor is electrically connected with the inverter in parallel.

Abstract: In an exemplary embodiment, a modular secondary containment unit is adapted to surround an above-ground fluid storage tank and includes a plurality of corner assemblies. Two or more components of each of the corner assemblies are composed of one or more reinforced resin composite materials. In several exemplary embodiments, the modular secondary containment units and the above-ground fluid storage tanks are used in oil and gas exploration and production operations. In an exemplary embodiment, an assembly for a modular secondary containment unit includes a track segment including first and second channels, a wall segment mounted on the track segment and extending within the first channel of the track segment, and a brace engaged with the wall segment and extending within the second channel of the track segment. In an exemplary embodiment, a method of constructing a modular secondary containment unit is provided.

Abstract: The portable multi-color fluorescence detection device includes a plurality of wells, an illumination module and a detection module. The plurality of wells configured for accommodating fluorescent mixture. The illumination module comprises at least two light sources and a color combination prism, the color combination prism being configured for combing different frequency light emitting form the at least two light sources into combination beams in parallel toward the plurality of wells for exciting the fluorescent mixture to generate fluorescent light. The detection module comprises a plurality of fiber bundles and an imaging unit, each of the fiber bundles be coupled with the corresponding well, wherein the fluorescent light is transmitted to the imaging unit through the plurality of fiber bundles and converted into an electrical signal by the imaging unit.

Abstract: A time-to-digital converter is provided. The time-to-digital converter comprises an oscillator controller, an invertible oscillator and a measurement circuit. The oscillator controller receives a start signal and a stop signal and outputs a mode signal. The invertible oscillator is electrically connected with the oscillator controller for receiving the mode signal. The oscillation direction of the invertible oscillator is inverted according to the mode signal, and the invertible oscillator outputs plural delay signals. The measurement circuit is electrically connected with the invertible oscillator for receiving the plural delay signals. The measurement circuit receives a sampling signal, samples the plural delay signals in accordance with the sampling signal, and outputs an output signal.

Abstract: In an exemplary embodiment, a modular secondary containment unit is adapted to surround an above-ground fluid storage tank and includes a plurality of corner assemblies. Two or more components of each of the corner assemblies are composed of one or more reinforced resin composite materials. In several exemplary embodiments, the modular secondary containment units and the above-ground fluid storage tanks are used in oil and gas exploration and production operations. In an exemplary embodiment, an assembly for a modular secondary containment unit includes a track segment including first and second channels, a wall segment mounted on the track segment and extending within the first channel of the track segment, and a brace engaged with the wall segment and extending within the second channel of the track segment. In an exemplary embodiment, a method of constructing a modular secondary containment unit is provided.

Abstract: A modular secondary containment unit that can be adapted to surround an above-ground fluid storage tank and can include a plurality of corner assemblies is described herein. Two or more components of each of the corner assemblies can be composed of one or more reinforced resin composite materials. The modular secondary containment units and the above-ground fluid storage tanks can be used in oil and gas exploration and production operations. An assembly for a modular secondary containment unit can include a track segment including first and second channels, a wall segment mounted on the track segment and extending within the first channel of the track segment, and a brace engaged with the wall segment and extending within the second channel of the track segment. A method of constructing a modular secondary containment unit is also provided.

Abstract: A refractive index sensor is provided for analyzing an analyte, the sensor including: a strip waveguide for receiving an input light signal therein and transmitting the light signal, subject to manipulation as it propagates through the strip waveguide, to a detector for analysis with respect to the analyte; and a slot waveguide for sensing the analyte disposed thereon and for receiving a sensing signal, corresponding to said manipulation of the light signal, from the strip waveguide, wherein a grating is formed on a surface of the strip waveguide to enable coupling of the sensing signal from the strip waveguide to the slot waveguide, and the sensor is configured with enhanced sensitivity based on a sensitivity difference between the slot waveguide and the strip waveguide, and/or a group index difference between the slot waveguide and the strip waveguide.

Abstract: A refractive index sensor is provided for analysing an analyte, the sensor including: a strip waveguide for receiving an input light signal therein and transmitting the light signal, subject to manipulation as it propagates through the strip waveguide, to a detector for analysis with respect to the analyte; and a slot waveguide for sensing the analyte disposed thereon and for receiving a sensing signal, corresponding to said manipulation of the light signal, from the strip waveguide, wherein a grating is formed on a surface of the strip waveguide to enable coupling of the sensing signal from the strip waveguide to the slot waveguide, and the sensor is configured with enhanced sensitivity based on a sensitivity difference between the slot waveguide and the strip waveguide, and/or a group index difference between the slot waveguide and the strip waveguide

Abstract: In an exemplary embodiment, a modular secondary containment unit is adapted to surround an above-ground fluid storage tank and includes a plurality of corner assemblies. Two or more components of each of the corner assemblies are composed of one or more reinforced resin composite materials. In several exemplary embodiments, the modular secondary containment units and the above-ground fluid storage tanks are used in oil and gas exploration and production operations. In an exemplary embodiment, an assembly for a modular secondary containment unit includes a track segment including first and second channels, a wall segment mounted on the track segment and extending within the first channel of the track segment, and a brace engaged with the wall segment and extending within the second channel of the track segment. In an exemplary embodiment, a method of constructing a modular secondary containment unit is provided.

Abstract: An anchoring system and method according to which a tubular member is positioned in a subterranean substrate and a conglomerate is formed within the subterranean substrate, the conglomerate including respective portions of the subterranean substrate and a chemical fastener in a cured state. The conglomerate is adhered to the tubular member. To form the conglomerate, the chemical fastener in a liquid state is injected into an internal passage defined by the tubular member so that the chemical fastener flows from the internal passage and into the subterranean substrate via at least a first radial opening formed in the first tubular member.