Abstract: An integrated triaxial shear and seepage experimental method for hydrate-bearing sediments and device thereof is provided, relating to the field of geotechnical experiments technologies. The method includes the following steps: generating hydrate; preparing a shear and seepage coupling experiment; and performing the shear and seepage coupling experiment. According to a special integrated experimental device, that coupling analysis of seepage and stress in a triaxial shear breakage process of the hydrate can be realized, and different experiments that are liquid seepage experiment and the gas-liquid seepage experiment can be realized.

Abstract: An example self-priming microfluidic structure can include a microfluidic channel including a floor and a ceiling. A channel height is defined as a distance between the floor and the ceiling. A channel height step can be in the floor, or ceiling, or both. The channel height downstream of the channel height step can be greater than the channel height upstream of the channel height step. An interior pillar can be positioned in the microfluidic channel extending from the floor to the ceiling. The interior pillar can include a widening portion at an upstream end of the interior pillar and a tapering portion at a downstream end of the interior pillar. The interior pillar can overlap the channel height step so that the interior pillar is partially upstream of the channel height step and partially downstream of the channel height step.

Abstract: An ultrasonic gas sensor includes a housing, and a first ultrasonic transducer and a second ultrasonic transducer that are separately arranged at a top of an inner chamber of the housing, where the first ultrasonic transducer and the second ultrasonic transducer form a V-shaped ultrasonic transmission path in the housing; the housing is provided therein with a gas inlet channel and a gas outlet channel; an upper end of the gas inlet channel is close to the first ultrasonic transducer, and an upper end of the gas outlet channel is close to the second ultrasonic transducer, such that a measured gas flow entering a bypass tube passes through a detection area of the first ultrasonic transducer and the second ultrasonic transducer; a lower end of the gas inlet channel and a lower end of the gas outlet channel communicate with a gas sensor mount.

Abstract: A device and method for health diagnosis of subgrade service performance, including: a loading device, which applies a load to a road; a data acquisition device, which collects stress and vertical displacement generated by a pavement layer when a load is applied; a data analysis device, that performs a frequency spectrum analysis on a vertical displacement signal to obtain a propagation speed of a Rayleigh wave of a pavement layer and a thickness of the pavement layer, and thereby obtains an elastic modulus of the pavement layer; inputting the stress, vertical displacement, elastic modulus and thickness of pavement layer into a trained subgrade soil modulus calculation model to obtain an elastic modulus of subgrade soil; and obtaining a dynamic deformation value of the subgrade under a standard load, and evaluating a health state of the subgrade according to the dynamic deformation value.

Abstract: Provided is a device for testing a reaction between supercritical carbon dioxide and a rock. The device includes a carbon dioxide pressurization system, a reaction system, a contact angle test system and an observation system. The carbon dioxide pressurization system is configured to liquefy, heat and vaporize an initial carbon dioxide gas to obtain gaseous carbon dioxide. The reaction system is configured to regulate and control a temperature and pressure to change a state of the gaseous state to obtain supercritical carbon dioxide, and to enable the supercritical carbon dioxide to react with a sample. The contact angle test system is configured to convey a reaction residual water source and receive residual supercritical carbon dioxide, and to carry out a contact reaction of the residual supercritical carbon dioxide, the sample and the reaction residual water source.

Abstract: A separating membrane includes: a planar edge region for the joining of the separating membrane to a diaphragm seal body; a working region offset in an axial direction relative to the edge region; and a transition region between the edge region and the working region, wherein the transition region extends over a radial region of not more than one quarter of an outer radius of the transition region, wherein the working region has a substantially planar center and an embossed pattern or undulation pattern between the center and an outer edge of the working region, wherein from the rest position to a point of deflection with a dimensionless pressure equivalent, the separating membrane has a characteristic curve in which, for a coefficient of determination R2 of a linear regression of the characteristic curve, the following applies: (1?R2)<1%.

Abstract: A viscosity control system for measuring and controlling a viscosity of a viscous fluid includes a viscosity sensor unit, a supply of viscosity adjusting fluid, and a controller. The viscosity sensor unit includes a container having an inlet and an outlet, a flow of the viscous fluid flowing into the inlet, and a sensor configured to sense a height of a surface of the viscous fluid in the container. A diameter of the outlet and the flow of the viscous fluid are configured to generate a height of the viscous fluid in the container that is within a predetermined height range. The controller is configured to receive the sensed height, compare the sensed height to the predetermined height range, and modulate a flow of fluid from the supply of viscosity adjusting fluid in response to the sensed height being outside the predetermined height range.

Abstract: An array of sensors provided on the outside of a tubular string for measuring a property within the tubular string. The array of sensors may include a plurality of connected sensors, wherein at least one of the plurality of connected sensors is at least partially encompassed in a shroud. A snorkel line may extend from the shroud, the snorkel line capable of coupling with a sensor port in a tubular of the tubular string. The snorkel line may establish fluid communication between one of the sensors at least partially encompassed in the shroud and a corresponding sensor port of a tubular in the tubular string.

Abstract: A sensor including a deformation body having a membrane for deformation when subjected to pressure from a medium. The sensor further includes a strain element applied to and attached to the membrane. The strain element is based on SOI technology and has multiple piezoresistive resistors.

Abstract: A torque sensor can measure torque introduced into an upper shaft that is rotatable around a longitudinal axis and is connectable to a lower shaft via a torsion rod. A first component is connectable to the upper shaft, and a second component is connectable to the lower shaft. The components have surfaces that protrude in a longitudinal direction and at least partially overlap. A sensor coil that can generate a high-frequency alternating magnetic field is arranged on one of the surfaces of one component, and a metallic element is arranged on one of the surfaces of the other component. A torque introduced into the upper shaft causes a change in distance between the sensor coil and the metallic element. A device can measure a frequency change of the alternating magnetic field caused by the change in distance and determine the torque introduced into the upper shaft.

Abstract: A gas detection system includes a sensor unit that outputs a voltage corresponding to a concentration of a specific gas, a first chamber capable of storing a supplied sample gas, a second chamber located between the first chamber and the sensor unit, and a flow path connectable to an inlet of the second chamber. The second chamber has a smaller area than the first chamber in a cross section perpendicular to a gas flow direction in the first chamber. The sample gas is supplied from the first chamber to the second chamber, and then a purge gas is supplied from the flow path to the second chamber to supply the sample gas to the sensor unit.

Abstract: A dual indentation test method according to an aspect of the present disclosure may include a first indentation step of indenting a surface of a material using a flat first indenter and a second indentations step of indenting the surface of the material indented by the first indenter using a second indenter.

Abstract: A drill pipe speed sensor includes a roller head assembly including an incremental encoder, a roller to contact a drill pipe, and first and second rotating members. The first rotating member is coupled to the roller, the second rotating member is coupled to the incremental encoder, and the first rotating member is coupled to the second rotating member. The sensor also includes a pivot assembly having mounting plates, pivotal arms, first and second mounting members, and a biasing member. The first and second mounting members extend between the mounting plates, which are parallel to each other. The biasing member contacts the mounting members and extends between the mounting members, and the biasing member is parallel to the mounting plates. The pivotal arms extend from the mounting plates to the roller head assembly and pivot relative to the mounting plates, and the first mounting member is coupled to two pivotal arms.

Abstract: This device includes: an input unit for receiving a shape of an inspection target surface of a wedge exposed from a slot with no force applied to the wedge; a relation storage unit which acquires and stores, as a deformation reaction force relation, a relation between a reaction force of a spring at the inspection target surface of the wedge and deformation distribution from the shape of the inspection target surface of the wedge inputted to the input unit; a measurement unit for measuring measurement deformation distribution of the inspection target surface of the wedge; an estimation unit for estimating an estimation reaction force from the measurement deformation distribution and the deformation reaction force relation; and a judgement unit for judging proper/fault about looseness of the wedge from the estimation reaction force.

Abstract: An in vitro method for diagnosing, stratifying, prognosing and/or monitoring a lung and/or respiratory disease, and for evaluating the effectiveness of a treatment of a lung and/or respiratory disease, can include the determination or the measurement of the value Anl of at least one rheological parameter on a sample of mucus A of a subject, in a non-linear zone of the deformation curve of the sample, and/or of the value Al of at least one rheological parameter on said sample, in a linear zone of the deformation curve of the sample, wherein the rheological parameter is selected from the elasticity modulus (G?), the viscosity modulus (G?), the complex modulus G*, the damping factor (tan ?), the complex modulus (G*), the critical deformation (?c), the plastic deformation (?p), the flow stress threshold (?c), the plastic stress (?p), and the elastic force (EF), the critical stress (?c), and any combination thereof.

Abstract: A method for determining the sticky point of powder samples includes introducing a sample into a first measuring part, placing a second measuring part above the first measuring part to delimit a sample chamber, using a motor to drive the measuring parts relative to one another, using a force application unit to exert a force on the sample normal to a rotational plane of the measuring parts, using a measuring unit to record a torque or shear stress of the sample between the measuring parts, using a temperature-control unit or oven to apply a temperature profile to the sample while measuring the torque or shear stress, and supplying recorded measured values of the torque or shear stress and the sample temperature at measuring points to an evaluation unit. The evaluation unit determines the sticky point from the measured values of the torque or shear stress and the temperature.

Abstract: A water sampling device for water quality measurement is capable of changing the sampling amount, the number of sampling container(s), the sampling container type and so on according to the item of water quality measurement. Water in a water system can be sampled into a first container Y1 via a sampling source pipe 1, a manifold 2, and a first sampling pipe 3 and a pump P1 connected to the manifold 2. Water in the water system also can be sampled into a second container Y2 from the manifold 2 via a second sampling pipe 4 and a pump P2. In a case where the detection value(s) of one or more of the sensors S1 to S3 set in the water system exceeds a preset standard value or deviates from a standard range, water to be tested is sampled from the water system.

Abstract: A system for sampling groundwater from a well that includes a pump configured to be at least partially submerged in the groundwater within the well and pump the groundwater out of the well, a sensor configured to output a signal indicative of the depth of the groundwater in the well, and a controller in communication with the sensor. The controller is configured to receive the signal indicative of the depth of the groundwater from the sensor and compensate for groundwater ingress into the well by adjusting a rate of flow of groundwater pumped by the pump based on the signal to stabilize the depth of groundwater in the well while the pump is pumping groundwater from the well.

Abstract: A sensor mount for use with a timber-working device includes a monolithic structure having a base portion configured to be secured to a frame of a timber-working device, and a sensor mounting portion including a cavity configured to receive a contactless sensor. The cavity has a sensor mounting surface for securing the contactless sensor thereto.

Abstract: Focused acoustic radiation, referred to as tonebursts, are applied to a volume of liquid to generate a set of droplets. The droplets generated are substantially smaller in scale than the focal spot size of the acoustic beam (e.g., the frequency at which the acoustic transducer operates). Further, the droplets have trajectories that are substantially in the direction of the acoustic beam propagation direction. In one embodiment, a first toneburst is applied to temporarily raise a protuberance on a free surface of the fluid. After the protuberance has reached a certain state, a second toneburst is applied to the protuberance to break it into very small droplets. In one embodiment, the state of the protuberance at which the second toneburst is supplied is the time period shortly after the protuberance reaches its maximum height but before the protuberance recedes back into the volume of fluid.