Abstract: A method for determining ecological risk, particularly a method for the ecological risk assessment of a heavy metal in a river basin sediment based on a toxicity effect. The assessment method includes screening the main aquatic organisms in a river basin; sampling a sediment, and determining and detecting the heavy metal type; measuring the concentration of the heavy metal in the sediment; collecting the heavy metal release coefficient; collecting the heavy metal toxicity data and fitting the data; determining the heavy metal HCsi value according to a fitting equation; calculating the heavy metal toxicity response coefficient; calculating the ecological risk index of the heavy metal. This method can further include calculating the comprehensive ecological risk index of various types of heavy metals. The method can accurately reflect the ecological risk of a heavy metal on aquatic organisms in a river basin.

Abstract: A method for determining ecological risk, particularly a method for the ecological risk assessment of a heavy metal in a river basin sediment based on a toxicity effect. The assessment method includes screening the main aquatic organisms in a river basin; sampling a sediment, and determining and detecting the heavy metal type; measuring the concentration of the heavy metal in the sediment; collecting the heavy metal release coefficient; collecting the heavy metal toxicity data and fitting the data; determining the heavy metal HCsi value according to a fitting equation; calculating the heavy metal toxicity response coefficient; calculating the ecological risk index of the heavy metal. This method can further include calculating the comprehensive ecological risk index of various types of heavy metals. The method can accurately reflect the ecological risk of a heavy metal on aquatic organisms in a river basin.

Abstract: The present invention relates to a QSAR toxicity prediction method for evaluating health effects of nano-crystalline metal oxides, and relates to the field of prediction of toxic substances in an environment. The QSAR toxicity prediction method specifically comprises: predicting a toxicity endpoint of an unknown metal oxide according to a quantitative relationship between structural characteristics and a cytotoxic effect of a nano-crystalline metal oxides.

Abstract: Disclosed are an intelligent control method and system for automobile headlights, which is used for improving traveling safety and comfort, and meanwhile solving the problem that monitoring the control result is not provided by existing automobile control systems. The intelligent control system for automobile headlights can control turning on and off of the automobile headlights automatically according to the changes of ambient light intensity, and switching between high/low beam lights can be automatically realized when automobiles meet at night, and meanwhile a self-diagnostic function is provided. Whether the control system for automobile headlights operates in an automatic mode or a manual mode, the operating status of the headlights can be monitored by the self-diagnostic function of the system and a fault point can be located accurately, which is output by means of a fault display lamp or a fault code.

Abstract: Disclosed are an intelligent control method and system for automobile headlights, which is used for improving traveling safety and comfort, and meanwhile solving the problem that monitoring the control result is not provided by existing automobile control systems. The intelligent control system for automobile headlights can control turning on and off of the automobile headlights automatically according to the changes of ambient light intensity, and switching between high/low beam lights can be automatically realized when automobiles meet at night, and meanwhile a self-diagnostic function is provided. Whether the control system for automobile headlights operates in an automatic mode or a manual mode, the operating status of the headlights can be monitored by the self-diagnostic function of the system and a fault point can be located accurately, which is output by means of a fault display lamp or a fault code.