Abstract: 2-hydroxy-5-[2-(4-(trifluoromethylphenyl)ethylamino)]benzoic acid crystal forms and a preparation method therefor are proposed. Crystal form I is a monoclinic crystal system, which has a Pc space group and can be obtained by slow cooling, evaporating the solvent at a constant temperature, evaporating the solvent at an increased temperature, or adding an anti-solvent. Crystal form II is a triclinic crystal system, which has a P1 space group and can be obtained by rapid cooling or freeze-drying. According to the method, the process is simple, costs are low, and the yield exceeds 90%; and the crystal forms of the crystal forms I and II have high purity, the crystal shapes thereof are intact, and have excellent fluidity, facilitating preparation, particularly the preparation of a pharmaceutical preparation for preventing and/or treating degenerative diseases of the central nervous system. Furthermore, the two crystal forms have a better apparent solubility than that of raw materials.

Abstract: A battery pack includes a housing, a battery module, and a resin layer. At least one side of the housing is provided with a through-hole. The battery module is accommodated in an accommodation cavity formed by the housing. The resin layer is disposed on a lower part of a side end of the battery module, and covers package parts of side ends of all cells. The side end of the battery module is the side ends of the plurality of cells in the battery module, and a channel is disposed between the through-hole and a space enclosed by the resin layer and the battery module. Based on this, this application can protect the package parts, and avoid corrosion of exposed metal at the package parts. Moreover, the resin layer can conduct, to the outside through the through-hole, heat produced by the cells, thereby facilitating heat dissipation.

Abstract: The invention relates to a wear-resistant steel with excellent surface quality, which is composed of C: 0.12-0.20%, Si: ?0.1%, Mn: 0.6-1.20%, Nb: 0.010-0.040%, V: ?0.01%, Ti: 0.010%-0.030, Al: ?0.04%, Ni: ?0.1%, Cu: ?0.1%, Cr: 0.10-0.40%, Mo: ?0.1%, B: 0.001-0.005%, Ca: 0.0010-0.0050%, P: ?0.010%, S: ?0.0015%, O: ?0.0012%, N: ?0.0035%, H: ?0.0002%, the balance is Fe, and the carbon equivalent CEV?0.4; PCM?0.25. The production process flow is: converter smelting->LF refining->VD or Rh high vacuum degassing->continuous casting->heating->rolling->shot blasting->quenching->tempering. The wear-resistant steel of the invention has better surface quality, and there are no surface defects such as air pit, inclusion, hemp pit and pressed iron oxide scale. The depth of surface spots caused by the peeling off iron oxide scale is ?0.1 mm, and the surface grinding of steel plate cannot be carried out. Based on element design, non-preheating welding and excellent toughness can be further realized.

Abstract: A dual-conductor based electromechanical energy conversion system. The system includes an external force device, a moving object connecting frame, a moving object, a dual-conductor assembly and a platform connecting frame. The external force device is connected with the moving object through the moving object connecting frame. The dual-conductor assembly is arranged under the moving object in parallel. The dual-conductor assembly is connected with an external platform through the platform connecting frame. The moving object generates a relative motion with the dual-conductor assembly according to an external force. The dual-conductor assembly generates an alternating current according to an alternating magnetic field generated by the moving object.

Abstract: A system for on-line measuring the thickness of a continuous casting billet and adjusting a rolling reduction amount, is capable of giving an accurate, constant and rapid feedback on the thickness of the billet in the continuous casting process online, avoiding the deviation of the rolling reduction amount of the billet in the continuous casting production process which is triggered by the factors such as the capacity of the continuous casting equipment, the execution deviation of the rolling reduction process, the metal solidification attribute such as non-preset expansion and contraction, so as to maximize the function of the continuous casting rolling reduction and improve the solidification quality of the billet.

Abstract: The present invention discloses a dual-conductor based electromechanical energy conversion system. The system includes an external force device, a moving object connecting frame, a moving object, a dual-conductor assembly and a platform connecting frame; the external force device is connected with the moving object through the moving object connecting frame; the dual-conductor assembly is arranged under the moving object in parallel; the dual-conductor assembly is connected with an external platform through the platform connecting frame; and the moving object generates a relative motion with the dual-conductor assembly according to an external force, and the dual-conductor assembly generates an alternating current according to an alternating magnetic field generated by the moving object.

Abstract: In one example embodiment, an analysis software package implements an improved damage detection technique to identify damaged elements of a structure. The software package accesses a model and receives measured responses resulting from physical testing of the structure under initial conditions and under damaged conditions. The analysis software package may search for a set of damaged elements, wherein the searching is based on an error function that evaluates goodness-of-fit between the model and the structure under damaged conditions based on a discrepancy between a modeled response difference and a measured response difference, wherein the modeled response difference is a difference between modeled responses determined from the model configured to model initial conditions and with selected damaged elements, and the measured response difference is a difference in measured responses determined from physical testing of the structure under the initial conditions and under the damaged conditions.

Abstract: A slip rate detection method and a detection system for detecting the slip rate of an electric vehicle using the method. The slip rate of an electric vehicle is measured by measuring the motor voltage, motor current, and motor rotational speed of the drive motor. The detection system includes a motor rotational speed detection unit, a motor voltage detection unit, and a motor current detection unit, all connected to the drive motor. The motor rotational speed detection unit, the motor voltage detection unit, and the motor current detection unit are connected to a slip rate calculation unit by means of a motor rotational speed signal processing unit, a voltage signal processing unit, and a current signal processing unit, respectively. The slip rate calculation unit is configured with a slip rate calculation formula. The formula is determined according to the drive motor type.

Abstract: A system for vehicle safety enhancement is disclosed. The system comprises a sudden slowdown detection subsystem, a slight bump detection subsystem, an airbag activation and brake malfunction detection subsystem, and a rollover detection subsystem. A controlling unit is connected to each subsystem for determining a severity level of a collision involving a vehicle, and the controlling unit is in turn connected to a communication unit for sending an alert signal based on the severity level. A method for vehicle safety enhancement is also disclosed.

Abstract: A slip rate detection method and a detection system for detecting the slip rate of an electric vehicle using the method. The slip rate of an electric vehicle is measured by measuring the motor voltage, motor current, and motor rotational speed of the drive motor. The detection system includes a motor rotational speed detection unit, a motor voltage detection unit, and a motor current detection unit, all connected to the drive motor. The motor rotational speed detection unit, the motor voltage detection unit, and the motor current detection unit are connected to a slip rate calculation unit by means of a motor rotational speed signal processing unit, a voltage signal processing unit, and a current signal processing unit, respectively. The slip rate calculation unit is configured with a slip rate calculation formula. The formula is determined according to the drive motor type.

Abstract: A system for vehicle safety enhancement is disclosed. The system comprises a sudden slowdown detection subsystem, a slight bump detection subsystem, an airbag activation and brake malfunction detection subsystem, and a rollover detection subsystem. A controlling unit is connected to each subsystem for determining a severity level of a collision involving a vehicle, and the controlling unit is in turn connected to a communication unit for sending an alert signal based on the severity level. A method for vehicle safety enhancement is also disclosed.