Abstract: Methods for realizing the CAPTCHA with 3D models and device thereof comprises following steps: (1) randomly selecting a 3D model from a model repository as an original model; generating two sets of random transformations; (2) applying the target transformations to the original model to generate a target model; generating a target image from rendering the target model; (3) applying the initial transformations to the original model to generate an operating model; displaying the operating model and the target image in two regions in client; (4) changing the property of the operating model through user interactive operation until the state of the operating model is consistent with the target image; generating a final transformations from the initial transformations by means of user interactive operation; (5) comparing the target transformations with the final transformations. It leverages the advantage of perception of 3D space in human beings.

Abstract: Methods for realizing the CAPTCHA with 3D models and device thereof comprises following steps: (1) randomly selecting a 3D model from a model repository as an original model; generating two sets of random transformations; (2) applying the target transformations to the original model to generate a target model; generating a target image from rendering the target model; (3) applying the initial transformations to the original model to generate an operating model; displaying the operating model and the target image in two regions in client; (4) changing the property of the operating model through user interactive operation until the state of the operating model is consistent with the target image; generating a final transformations from the initial transformations by means of user interactive operation; (5) comparing the target transformations with the final transformations. It leverages the advantage of perception of 3D space in human beings.

Abstract: The invention provides a fluoride-free continuous casting mold flux for low-carbon steel, comprising, based on weight, Na2O 5-10%, MgO 3-10%, MnO 3-10%, B2O3 3-10%, Al2O3?6%, Li2O<3%, C 1-3%, and the balance of CaO and SiO2 as well as inevitable impurities, wherein the ratio of CaO/SiO2 is 0.8˜1.3. The mold flux has a melting point of 95˜1150° C., a viscosity at 1300° C. of 0.1-0.3 Pa·s, and a crystallization rate of 10-50% as determined according to the method described in the specification for examining crystallization property. The boron-containing, fluoride-free flux developed according to the invention has a moderate crystallization rate, can be used in a crystallizer to control transfer of heat from molten steel effectively, and has been applied successfully in a low-carbon steel slab conticaster with a metallurgical effect that arrives at the level of a traditional fluoride-containing flux to full extent.

Abstract: A device for measuring the flow rate of steel melt near the surface thereof. The device has a flow rate detecting rod and a deflection device for the flow rate detecting rod. The deflection device for the flow rate detecting rod has a flow rate detecting rod counterweight, a deflection bearing sleeve, a deflection bearing, a deflection angle indicating board, a deflection angle pointer and a flow rate detecting rod fastening bolt.

Abstract: A fluoride-free continuous casting mold flux for ultralow carbon steel, comprising the following components in weight percentage: 3-10% of Na2O, 0-3% of Li2O, 3-8% of MgO, 5-15% of MnO, 0-8% of BaO, 4-12% of Al2O3, and impurities with a content of no more than 2%, the balance being CaO and SiO2, wherein the ratio of CaO/SiO2 is 0.8-1.3; the raw materials are mixed and then pre-melted; the pre-melted mold flux requires micro-adjusting according to the component deviation, and the ratio of the pre-melted material is not lower than 70%; then a carbonaceous material of 1-3% by the total weight of the mold flux is added and mixed so as to obtain the finished product mold flux. Said mold flux has a melting point of 1100-1200° C. and a viscosity of 0.2-0.6 Pa·s at 1300° C.

Abstract: A format for modified IRIB-G time code, with added message fields while preserving pulse width coding rule of the standard IRIG-B time code, having a time interval field for carrying time interval between the local time signal and a received time signal, and a user-defined or padded field for carrying user-defined time and/or control messages. An encoding and a decoding methods and devices for high-precision time transfer, where the modified IRIG-B time code carries more messages, and enabling transmission of timing messages and testing messages of two-way time comparison via a single message channel at the same time, which reduces fluctuation due to encoding and decoding manipulation and correlation with working frequencies via exact synchronization between the on-times of the output encoded time code and the transmitted time signal, and between the on-times of the output decoded time signal and the input time code, and improves precision of time transfer.

Abstract: A fluoride-free continuous casting mold flux for ultralow carbon steel, comprising the following components in weight percentage: 3-10% of Na2O, 0-3% of Li2O, 3-8% of MgO, 5-15% of MnO, 0-8% of BaO, 4-12% of Al2O3, and impurities with a content of no more than 2%, the balance being CaO and SiO2, wherein the ratio of CaO/SiO2 is 0.8-1.3; the raw materials are mixed and then pre-melted; the pre-melted mold flux requires micro-adjusting according to the component deviation, and the ratio of the pre-melted material is not lower than 70%; then a carbonaceous material of 1-3% by the total weight of the mold flux is added and mixed so as to obtain the finished product mold flux. Said mold flux has a melting point of 1100-1200° C. and a viscosity of 0.2-0.6 Pa·s at 1300° C.

Abstract: A device for measuring the flow rate of steel melt near the surface thereof. The device has a flow rate detecting rod and a deflection device for the flow rate detecting rod. The deflection device for the flow rate detecting rod has a flow rate detecting rod counterweight, a deflection bearing sleeve, a deflection bearing, a deflection angle indicating board, a deflection angle pointer and a the flow rate detecting rod fastening bolt.

Abstract: The invention provides a fluoride-free continuous casting mold flux for low-carbon steel, comprising, based on weight, Na2O 5-10%, MgO 3-10%, MnO 3-10%, B2O3 3-10%, Al2O3?6%, Li2O<3%, C 1-3%, and the balance of CaO and SiO2 as well as inevitable impurities, wherein the ratio of CaO/SiO2 is 0.8˜1.3. The mold flux has a melting point of 95˜1150° C., a viscosity at 1300° C. of 0.1-0.3 Pa·s, and a crystallization rate of 10-50% as determined according to the method described in the specification for examining crystallization property. The boron-containing, fluoride-free flux developed according to the invention has a moderate crystallization rate, can be used in a crystallizer to control transfer of heat from molten steel effectively, and has been applied successfully in a low-carbon steel slab conticaster with a metallurgical effect that arrives at the level of a traditional fluoride-containing flux to full extent.

Abstract: A format for modified IRIB-G time code, with added message fields while preserving pulse width coding rule of the standard IRIG-B time code, having a time interval field for carrying time interval between the local time signal and a received time signal, and a user-defined or padded field for carrying user-defined time and/or control messages. An encoding and a decoding methods and devices for high-precision time transfer, where the modified IRIG-B time code carries more messages, and enabling transmission of timing messages and testing messages of two-way time comparison via a single message channel at the same time, which reduces fluctuation due to encoding and decoding manipulation and correlation with working frequencies via exact synchronization between the on-times of the output encoded time code and the transmitted time signal, and between the on-times of the output decoded time signal and the input time code, and improves precision of time transfer.