As technology advances, the role that cars play in our daily lives increases. Both car manufactures and customers are eager to know about the car quality to help them choose the car they like. In this paper, three mod...
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As technology advances, the role that cars play in our daily lives increases. Both car manufactures and customers are eager to know about the car quality to help them choose the car they like. In this paper, three mod...
详细信息
ISBN:
(数字)9798350393682
ISBN:
(纸本)9798350393699
As technology advances, the role that cars play in our daily lives increases. Both car manufactures and customers are eager to know about the car quality to help them choose the car they like. In this paper, three models were used to train and find the relationship between the car attributes and labels to predict the car quality. The dataset was found in the UCI dataset at first. Next the attributes and label of the data were changed into string type to fulfill the requirement of training the machine learning model. Then the dataset was divided into the training set and testing set to fit the model. The machine learning algorithms used in the article includes the Decision Tree model, Random Forest model, Extra Tree model. These models are used to train and test the dataset respectively and the accuracy of each model can be obtained. Finally, the most suitable hyperparameters in each model were found by using the validation curve. Experimental results indicate that the Random Forest model’s precision can reach to 85.66% and it is the most accurate one among three models. Thus, The Random Forest model would help the customers and manufacturers to have the better car.
Li metal is widely recognized as the desired anode for next-generation energy storage,Li metal batteries,due to its highest theoretical capacity and lowest ***,it suffers from unstable elec-trochemical behaviors like ...
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Li metal is widely recognized as the desired anode for next-generation energy storage,Li metal batteries,due to its highest theoretical capacity and lowest ***,it suffers from unstable elec-trochemical behaviors like dendrite growth and side reactions in practical ***,we report a highly stable anode with collector,Li5Mg@Cu,realized by the melting-rolling *** Li5Mg@Cu anode delivers ultrahigh cycle stability for 2000 and 1000 h at the current densities of 1 and 2 mA cm-2,respectively in symmetric ***,the Li5Mg@Cu|LFP cell exhibits a high-capacity retention of 91.8％for 1000 cycles and 78.8％for 2000 cycles at 1 ***,we investigate the suppression effects of Mg on the dendrite growth by studying the performance of LixMg@Cu electrodes with different Mg contents(2.0-16.7 at％).The exchange current density,surface energy,Li+diffusion coefficient,and chem-ical stability of LixMg@Cu concretely reveal this improving suppression effect when Mg content becomes *** addition,a Mg-rich phase with"hollow brick"morphology forming in the high Mg content LixMg@Cu guides the uniform deposition of *** study reveals the suppression effects of Mg on Li dendrites growth and offers a perspective for finding the optimal component of Li-Mg alloys.
Microtus fortis is the only mammalian host that exhibits intrinsic resistance against Schistosoma japonicum ***,the underlying molecular mechanisms of this resistance are not yet ***,we perform the first de novo genom...
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Microtus fortis is the only mammalian host that exhibits intrinsic resistance against Schistosoma japonicum ***,the underlying molecular mechanisms of this resistance are not yet ***,we perform the first de novo genome assembly of ***,comprehensive gene annotation analysis,and evolution ***,we compare the recovery rate of schistosomes,pathological changes,and liver transcriptomes between *** and mice at different time points after *** observe that the time and type of immune response in *** are different from those in *** activates immune and inflammatory responses on the 10th day post infection,such as leukocyte extravasation,antibody activation,Fc-gamma receptor-mediated phagocytosis,and the interferon signaling cascade,which play important roles in preventing the development of *** contrast,an intense immune response occurrs in mice at the late stages of infection and could not eliminate *** mice suffer severe pathological injury and continuous decreases in cell cycle,lipid metabolism,and other *** findings offer new insights into the intrinsic resistance mechanism of *** against schistosome *** genome sequence also provides the basis for future studies of other important traits in ***.
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