Abstract: A well cementing method is described for improving cementing quality by controlling the hydration heat of cement slurry. By controlling the degree and/or rate of hydration heat release from cement slurry, the method improves the hydration heat release during formation of cement with curing of cement slurry, improves the binding quality between the cement and the interfaces, and in turn improves the cementing quality at the open hole section and/or the overlap section. The cementing method improves cementing quality of oil and gas wells and reduces the risk of annular pressure.

Abstract: A logic control system for magnetic track braking of a rail transit vehicle includes a magnetic track braking control circuit, a magnetic track braking power supply execution circuit, and a magnetic track braking status monitoring and feedback circuit. The magnetic track braking control circuit includes a pneumatic actuator relay, an electromagnet relay, a system protection relay, a power-on delay relay, a power-off delay relay, an automatic control branch circuit, and a manual control branch circuit. The pneumatic actuator relay is connected to the power-on delay relay, and the system protection relay is connected to the power-off delay relay. The automatic control branch circuit includes a first isolation magnetic track braking switch and an emergency braking relay contact. The manual control branch circuit includes a first circuit breaker, a cab signal option switch, a second isolation magnetic track braking switch and a manual touch button.

Abstract: A logic control system for magnetic track braking of a rail transit vehicle includes a magnetic track braking control circuit, a magnetic track braking power supply execution circuit, and a magnetic track braking status monitoring and feedback circuit. The magnetic track braking control circuit includes a pneumatic actuator relay, an electromagnet relay, a system protection relay, a power-on delay relay, a power-off delay relay, an automatic control branch circuit, and a manual control branch circuit. The pneumatic actuator relay is connected to the power-on delay relay, and the system protection relay is connected to the power-off delay relay. The automatic control branch circuit includes a first isolation magnetic track braking switch and an emergency braking relay contact. The manual control branch circuit includes a first circuit breaker, a cab signal option switch, a second isolation magnetic track braking switch and a manual touch button.

Abstract: This disclosure describes an in-situ surrounding rock testing device and method. The testing device includes a collection device and a control terminal. The collection device includes a pressure cell, displacement meters and a magnetic base. When mechanical properties of surrounding rock are tested, the collection device is only necessary to be installed on an outer surface of a gripper of a TBM. The outer surface of the gripper is coupled to a rear end surface of the magnetic base; a front end surface of the pressure cell and displacement meters are in contact with the surrounding rock. The pressure cell measures pressures undergone by the surrounding rock. The displacement meters measure a total compaction displacement of the surrounding rock relative to the collection device. A pressure-displacement curve of the surrounding rock can be obtained by the testing device while pressing the gripper tightly against the surrounding rock.

Abstract: A computer-implemented technique receives an input expression that a user submits with an intent to accomplish some objective. The technique then uses a machine-trained intent encoder component to map the input expression into an input expression intent vector (IEIV). The IEIV corresponds to a distributed representation of the intent associated with the input expression, within a vector intent vector space. The technique then leverages the intent vector to facilitate some downstream application task, such as the retrieval of information. Some application tasks also use a neighbor search component to find expressions that express an intent similar to that of the input expression. A training system trains the intent encoder component based on the nexus between queries and user clicks, as recorded in a search engine's search log.

Abstract: A computer-implemented technique is described herein that receives an input expression that a user submits with an intent to accomplish some objective. The technique then uses a machine-trained intent encoder component to map the input expression into an input expression intent vector (IEIV). The IEIV corresponds to a distributed representation of the intent associated with the input expression, within a vector intent vector space. The technique then leverages the intent vector to facilitate some downstream application task, such as the retrieval of information. Some application tasks also use a neighbor search component to find expressions that express an intent similar to that of the input expression. A training system trains the intent encoder component based on the nexus between queries and user clicks, as recorded in a search engine's search log.

Abstract: A lens ferrule for connection to a second ferrule includes a plurality of lenses disposed in a recess formed in a contact face that comes in contact with the second ferrule, a slit formed in an insertion face opposite the contact face and configured to receive an optical waveguide, a through hole cut into the contact face and configured to receive a guide pin for positional alignment with the second ferrule, a lens-position reference plane configured to serve as a reference for measuring positions of the lenses, and a slit-position reference plane configured to serve as a reference for measuring a position of the slit, wherein the lens-position reference plane and the slit-position reference plane are disposed at different depths from the contact face in an area including the through hole.

Abstract: An optical connector for detachable coupling to a cage includes a case having a guide portion and a pull-tab movably attached to the case, wherein the pull-tab includes an arm made of an elastic material and configured to slide on the guide portion of the case to be elastically deformed upon the pull-tab being moved in a removal direction in which the optical connector is uncoupled from the cage, and wherein moving the pull-tab in the removal direction relative to the case against an elastic force applied by the arm causes the pull-tab to disable a lock that secures the case to the cage.

Abstract: An optical module includes a housing having an upper cover and a lower cover; a substrate having a circuit device mounted on its first surface; a heat dissipation member configured to be in contact with the circuit device mounted on the substrate; and at least one inner case having stiffness, wherein the upper cover is disposed facing the first surface of the substrate, and the lower cover is disposed facing a second surface of the substrate, and the inner case is disposed so as to press the substrate from the second surface of the substrate toward the upper cover.

Abstract: A ferrule includes a ferrule body having a first opening formed in a side face thereof, and having a second opening formed in a top face thereof, wherein the first opening is configured to receive an optical waveguide inserted into the ferrule body at the side face, and wherein the second opening is formed over and in communication with the first opening, such that the second opening connects an inner space of the first opening to an outside of the ferrule body.

Abstract: An optical module for connecting a ferrule for connecting an optical fiber and a photoelectric transducer mounted on a substrate includes first lenses, second lenses, and a dummy lens. The first lenses are provided on a first side of the optical module to which the ferrule is to be connected. The second lenses and the dummy lens are provided on a second side of the optical module facing a surface of the substrate. The second lenses and the dummy lens are aligned on the same line. An image of the dummy lens is reflected from a mirror to be projected onto a plane on the first side of the optical module.

Abstract: An optical connector for detachable coupling to a cage includes a case having a guide portion and a pull-tab movably attached to the case, wherein the pull-tab includes an arm made of an elastic material and configured to slide on the guide portion of the case to be elastically deformed upon the pull-tab being moved in a removal direction in which the optical connector is uncoupled from the cage, and wherein moving the pull-tab in the removal direction relative to the case against an elastic force applied by the arm causes the pull-tab to disable a lock that secures the case to the cage.

Abstract: A pull part for coupling to a connector includes a latch configured to be coupled to a housing of the connector and a tab configured to be coupled to the latch, wherein the latch has two support parts, a beam, and connecting portions, the beam connecting the two support parts, the connecting portions being situated between the support parts and the beam, and the two support parts configured to be attached to the housing, wherein the tab includes a body and a handle, the body having connection grooves formed at one side thereof and having the handle at an opposite side thereof, and wherein the connecting portions situated between the support parts and the beam are inserted into the connection grooves so as to couple the latch and the tab to each other.

Abstract: An optical module for connecting a photoelectric conversion device on a substrate to a ferrule connected to an optical fiber includes a body configured to be mounted on the substrate, a first lens disposed on the body at a side thereof connectable to the ferrule, a second lens disposed on the body at a side thereof facing the substrate, and a core disposed in the body between the first lens and the second lens, wherein a refractive index of the core is higher than a refractive index of the body.

Abstract: A connection support part includes a support body, a cable connecting part provided at one end of the support body in a longitudinal direction thereof and configured to be mounted to an optical cable, and a ferrule connecting part provided at another end of the support body in the longitudinal direction thereof and configured to be mounted to a ferrule, wherein the cable connecting part clamps a sleeve covering the optical cable so as to be mounted to the optical cable, and the ferrule connecting part has a contact portion placed in contact with the ferrule.

Abstract: A pull part for coupling to a connector includes a latch configured to be coupled to a housing of the connector and a tab configured to be coupled to the latch, wherein the latch has two support parts, a beam, and connecting portions, the beam connecting the two support parts, the connecting portions being situated between the support parts and the beam, and the two support parts configured to be attached to the housing, wherein the tab includes a body and a handle, the body having connection grooves formed at one side thereof and having the handle at an opposite side thereof, and wherein the connecting portions situated between the support parts and the beam are inserted into the connection grooves so as to couple the latch and the tab to each other.

Abstract: A removal unit includes a latch and a tab separably connectable to the latch. The latch includes latch arms each including a connection hole and an opening extending from the connection hole and being smaller than the connection hole. The tab includes a body, tab arms extending from the body, and protrusions provided on the tab arms to protrude toward each other. The protrusions each include a connecting part and an engaging part extending from the connecting part and being larger than the connection hole. The connecting part is provided on the tab arm, and configured to be placed into the connection hole. The connecting part has a width in a first direction smaller than the width of the opening and a length in a second direction perpendicular to the first direction smaller than the diameter of the connection hole and greater than the width of the opening.

Abstract: A removal unit includes a latch and a tab separably connectable to the latch. The latch includes latch arms each including a connection hole and an opening extending from the connection hole and being smaller than the connection hole. The tab includes a body, tab arms extending from the body, and protrusions provided on the tab arms to protrude toward each other. The protrusions each include a connecting part and an engaging part extending from the connecting part and being larger than the connection hole. The connecting part is provided on the tab arm, and configured to be placed into the connection hole. The connecting part has a width in a first direction smaller than the width of the opening and a length in a second direction perpendicular to the first direction smaller than the diameter of the connection hole and greater than the width of the opening.

Abstract: An optical module for connecting a ferrule for connecting an optical fiber and a photoelectric transducer mounted on a substrate. The optical module includes first lenses provided on a first side of the optical module to which the ferrule is to be connected, second lenses provided on a second side of the optical module facing the substrate, an inclined plane provided between the first lenses and the second lenses, and inclined with respect to a surface of the substrate, and a guide hole formed in the inclined plane, to which a guide pin of the ferrule is inserted.