Abstract: A tundish, wherein a steel passing hole (43) is provided at a lower portion of a gas-curtain weir refractory body (42); an argon duct (46), a gas chamber (45) and a gas-permeable brick (44) are connected to form a gas-curtain generating device, and the gas-curtain generating device is installed at the lower portion of the gas-curtain weir refractory body (42); the gas-permeable brick (44) is provided in association with the position of the steel passing hole (43), and a length of the gas-permeable brick is designed larger than a width of the steel passing hole (43); and a gas-curtain weir plate (4) is provided in a tundish container, the gas-curtain weir refractory body (42) crosses the tundish container horizontally, and divides the tundish container into a first region and a second region.

Abstract: The present invention discloses a respirator for measuring a respiratory rate of a biofilm. The respirator includes a body, a carbon dioxide absorption tube and a perforated partition disposed in an interior of the body. The perforated partition divides the interior of the body into an oxygen mass-transfer stir zone provided with a stirring device and a biofilm reaction zone for placing MBBR fillers. The carbon dioxide absorption tube is provided with an air vent and contains a solution capable of absorbing CO2. The perforated partition has a first hole corresponding to a middle portion and a lower portion of the perforated partition and acting as a liquid-exchange channel, and a second hole corresponding to an upper portion of the perforated partition and acting as a gas-exchange channel, and the oxygen mass-transfer stir zone is communicated with the biofilm reaction zone through the liquid-exchange channel and the gas-exchange channel.

Abstract: A control method of a switching circuit, a control circuit of the switching circuit, and the switching circuit are provided. The switching circuit includes an inductor or a transformer. An operational amplification is performed on an output feedback voltage and a first reference voltage of the switching circuit to obtain a compensation voltage. The compensation voltage controls an on-time of a main switch of the switching circuit. When the current of the inductor or the transformer drops to a threshold, after a time, the main switch is switched from off to on, and the output feedback voltage controls the time. When the output feedback voltage is higher than a first threshold voltage, the compensation voltage is pulled down. When the output feedback voltage is lower than a second threshold voltage, the compensation voltage is pulled up.

Abstract: A high-precision intelligent detection method for bridge diseases based on spatial position. The method comprising: collecting images based on the high-definition image acquisition system; importing the image data and position information data into image processing software to create a mosaic image of each part of the bridge; importing the prepared spliced image map into the bridge disease intelligent identification system; obtaining the corresponding position and bridge of the bridge disease in the three-dimensional model of the bridge; identifying the stitched image map to obtain the size of the disease after identifying the bridge disease image and locating the bridge disease. The high-precision intelligent detection method for bridge diseases based on spatial position realizes automatic collection and intelligent analysis of bridge inspection data, reduces the workload of the inspection technicians and improves the detection efficiency.

Abstract: A high-precision intelligent detection method for bridge diseases based on spatial position. The method comprising: collecting images based on the high-definition image acquisition system; importing the image data and position information data into image processing software to create a mosaic image of each part of the bridge; importing the prepared spliced image map into the bridge disease intelligent identification system; obtaining the corresponding position and bridge of the bridge disease in the three-dimensional model of the bridge; identifying the stitched image map to obtain the size of the disease after identifying the bridge disease image and locating the bridge disease. The high-precision intelligent detection method for bridge diseases based on spatial position realizes automatic collection and intelligent analysis of bridge inspection data, reduces the workload of the inspection technicians and improves the detection efficiency.

Abstract: A protection circuit and an illumination driving circuit are described herein. The protection circuit comprises a detection circuit, detecting a current flowing through a first switch to obtain a current detection signal and determining whether there is leakage at an input terminal according to the current detection signal; a control circuit, controlling the first switch to switch on intermittently, detecting the current flowing through the first switch by the detection circuit during a switch-on period of the first switch, and keeping the load at a disconnection state if the detection circuit determines there is leakage; and the first switch, connected to the input terminal, and a control terminal of the first switch being connected to the control circuit, and the first switch being controlled by the control circuit to be switched on intermittently. The present invention has the protection function and enhances safety during load removing and installation processes.

Abstract: There is provided a dimming circuit, a dimming method and a LED driving circuit. On the basis of the dimming of a dimmer, the circuit according to the disclosure generates a plurality of current reference signals corresponding to a plurality of loads in accordance with a dimming signal, to change a ratio of load currents of the plurality of loads, so that, the adjustment of color temperature is implemented, wherein the dimming signal represents the changes of switching operation or dimming speed of the dimmer, and the ratio of current load currents of the plurality of loads is latched or a predetermined ratio of load currents is latched. According to the disclosure, the dimmer can be used for directly adjusting color temperature, without the need for a MCU, so that, the system compatibility is improved and the cost is decreased.

Abstract: The present invention discloses a bleeder circuit; solutions of the present invention may be applied in linear driving and switch driving solutions; a threshold voltage is a zero crossing value, and when the input voltage is zero crossing, the load current at this time is zero; a bleeder current is generated to make the input current greater than a holding current of a TRIAC dimmer, to maintain turning-on of the TRIAC dimmer, and a second time is set as a delay time, which reduces power consumption. In the application of switch driving solution, the current regulating circuit is controlled to be enabled according to the waveform features of the previous and latter halves of periods of the sine wave as well as the size of the input current of the driving circuit.

Abstract: The present disclosure discloses a bleeder circuit and a control method thereof, and an LED control circuit. The present disclosure is applied in an LED control circuit of TRIAC dimming, directly or indirectly detects cross-zero point of input voltage; after cross-zero point of the input voltage is delayed by a second time, the bleeder module works to generate bleeder current, and a time between turn-on time of the TRIAC and a time that a driving circuit input current achieves a predetermined value (maintaining current of TRIAC) is a first time. During the first time, the bleeder circuit generates losses; when the first time is greater than a predetermined value, the second time is prolonged; when the first time is smaller than the predetermined value, the second time is reduced, such that the first time is close to or equal to the predetermined value.

Abstract: A protection circuit and an illumination driving circuit are described herein. The protection circuit comprises a detection circuit, detecting a current flowing through a first switch to obtain a current detection signal and determining whether there is leakage at an input terminal according to the current detection signal; a control circuit, controlling the first switch to switch on intermittently, detecting the current flowing through the first switch by the detection circuit during a switch-on period of the first switch, and keeping the load at a disconnection state if the detection circuit determines there is leakage; and the first switch, connected to the input terminal, and a control terminal of the first switch being connected to the control circuit, and the first switch being controlled by the control circuit to be switched on intermittently. The present invention has the protection function and enhances safety during load removing and installation processes.

Abstract: There is provided a dimming circuit, a dimming method and a LED driving circuit. On the basis of the dimming of a dimmer, the circuit according to the disclosure generates a plurality of current reference signals corresponding to a plurality of loads in accordance with a dimming signal, to change a ratio of load currents of the plurality of loads, so that, the adjustment of color temperature is implemented, wherein the dimming signal represents the changes of switching operation or dimming speed of the dimmer, and the ratio of current load currents of the plurality of loads is latched or a predetermined ratio of load currents is latched. According to the disclosure, the dimmer can be used for directly adjusting color temperature, without the need for a MCU, so that, the system compatibility is improved and the cost is decreased.

Abstract: The present disclosure discloses a bleeder circuit and a control method thereof, and an LED control circuit. The present disclosure is applied in an LED control circuit of TRIAC dimming, directly or indirectly detects cross-zero point of input voltage; after cross-zero point of the input voltage is delayed by a second time, the bleeder module works to generate bleeder current, and a time between turn-on time of the TRIAC and a time that a driving circuit input current achieves a predetermined value (maintaining current of TRIAC) is a first time. During the first time, the bleeder circuit generates losses; when the first time is greater than a predetermined value, the second time is prolonged; when the first time is smaller than the predetermined value, the second time is reduced, such that the first time is close to or equal to the predetermined value.

Abstract: Embodiments of the present invention provide a press tool and an electronic product detecting apparatus including the press tool. The press tool includes: a connector soft-contact member including: a first base plate; a floating plate mounted to the first base plate; and a buffer member mounted between the first base plate and the floating plate and configured such that when receiving a pressing force, the buffer member generates a repulsive force, so that the floating plate is floatable; and a press member connected with the connector soft-contact member such that they are openable and closable relative to each other. The press member includes a second base plate and a connector bearing piece which is mounted to the second base plate and which is positioned just opposite to the floating plate when the connector soft-contact member and the press member are closed.

Abstract: Embodiments of the present invention provide a press tool and an electronic product detecting apparatus including the press tool. The press tool includes: a connector soft-contact member including: a first base plate; a floating plate mounted to the first base plate; and a buffer member mounted between the first base plate and the floating plate and configured such that when receiving a pressing force, the buffer member generates a repulsive force, so that the floating plate is floatable; and a press member connected with the connector soft-contact member such that they are openable and closable relative to each other. The press member includes a second base plate and a connector bearing piece which is mounted to the second base plate and which is positioned just opposite to the floating plate when the connector soft-contact member and the press member are closed.

Abstract: An anti-rutting pavement structure is arranged consecutively from bottom to top, a semi-rigid base layer, a SBS emulsified asphalt adhesive layer, a Type II latex cement mortar poured asphalt concrete lower layer, a Type I latex cement mortar poured asphalt concrete middle layer and a high viscosity modified asphalt SMA-13 concrete surface layer.

Abstract: The present invention discloses a bleeder circuit; solutions of the present invention may be applied in linear driving and switch driving solutions; a threshold voltage is a zero crossing value, and when the input voltage is zero crossing, the load current at this time is zero; a bleeder current is generated to make the input current greater than a holding current of a TRIAC dimmer, to maintain turning-on of the TRIAC dimmer, and a second time is set as a delay time, which reduces power consumption. In the application of switch driving solution, the current regulating circuit is controlled to be enabled according to the waveform features of the previous and latter halves of periods of the sine wave as well as the size of the input current of the driving circuit.

Abstract: An anti-rutting pavement structure, which is characterized in that it comprises, arranged consecutively from bottom to top, a semi-rigid base layer, a SBS emulsified asphalt adhesive layer, a Type II latex cement mortar poured asphalt concrete lower layer, a Type I latex cement mortar poured asphalt concrete middle layer and a high viscosity modified asphalt SMA-13 concrete surface layer. Compared with prior art, the present invention has improved great contributions of the middle and lower layer of the semi-rigid base layer pavement for rutting under high temperatures and heavy loads, while the pavement having a good crack-resistance, improvement for coordination of the overall deformation of the surface layer and the base layer, and a short construction conservation period, short time before traffic opening, excellent economic performance.

Abstract: A pesticide solid nanodispersion and its preparation method. The said pesticide solid nanodispersion is composed of 0.001-90 parts by weight of pesticide, 0.001-50 parts by weight of surfactants and 5-99.9 parts by weight of water-soluble carriers. The said pesticide is one or more pesticide(s) selected from poorly water-soluble insecticides, fungicides, herbicides or plant growth regulators; the particle size of the said solid nanodispersion is less than 1 ?m. Compared with the prior art, the pesticide of the present invention has smaller particle size, more uniform dispersibility and better coating effect of surfactants. The content of surfactants may be less than 1%, even less than 0.1%, and can maintain good dispersibility and stability as well.