ABSTRACT
The battery thermal management system (BTMS) using a unidirectional cooling strategy for a battery pack would cause the temperature gradient between the battery cells located at the inlet and outlet of the duct, which would reduce the temperature uniformity of the battery module. In order to solve the problem, the reciprocating cooling strategy was introduced in this paper to study the effect of switching time (τ) on the temperature uniformity of the battery module. Based on this, the flat heat pipe was combined with liquid cooling, in which the efficient heat transfer performance of the flat heat pipe could transfer the heat of the battery cells to the liquid. Using CFD to simulate the proposed BTMS, the result showed that the reciprocating cooling strategy could improve the temperature performance of the BTMS.
ABSTRACT
Today's operation environment integrated complex imaging and image integration of sterile surgical guide equipment and advanced technology, the highly advanced equipment, technology is a highly integrated, high degree of integration, completely changed the traditional surgery, arises at the historic moment is complex suitable for different types of operation of the operating room. This paper summarizes some compound in the operating room development course, according to the clinical demand constantly appear different type composite configuration and composite operating room equipment, for the future development of composite operating room was prospected.
ABSTRACT
Objective: To investigate the correlation of thrombospondin-1(TSP-1) expression and angiogenesis and clinical pathologic factors in breast cancer. Methods:Reverse transcription-polymerase chain reaction (RT-PCR) was used to detect the expression of TSP-1 mRNA in the primary breast cancer tissues and the tissues set apart 5 cm from the tumor. Im-munohistochemistry was used to detect the expressions of vascular endothelial growth factor (VEGF), c-erbB2, estrogen receptor (ER), progesterone receptor (PR) and microvessel density (MVD). All data were statistically analyzed. Results: The positive rate of TSP-1 was significantly higher in breast cancer than that in tissues set apart 5 cm from tumor (P < 0.05). The expression of TSP-1 was positively correlated with tumor size only (P < 0.05). MVD was lower in TSP-1 positive group than that of negative group (P< 0.05). Conclusion: The MVD was decreased with up-regulation of TSP-1 expression. Thrombospondin-1 may repress the angiogenesis in breast cancer.
ABSTRACT
OBJECTIVE To investigate the transmission of microorganisms by humidifier during oxygen humidification and search an ideal way to prevent it.METHODS Two kinds of humidifier,the unique bionic humidifier and the bubble humidifier,were involved.The humidification material inside the humidifiers were all contaminated with Staphylococcus aureaus,Escherichia coli and Candida albican at 5?105/ml and 2.5?106/ml.Oxygen passed through every contaminated humidifier to the end of oxygen tube which was put in the bottle with 100ml normal saline,lasting 20 minutes,on the 1st,the 2nd,and the 3rd day after the humidifiers being contaminated.The fluid in the bottles,1ml each,were cultured respectively.RESULTS The S.aureaus count of 39.5,52.4,117.3 CFU/ml in 5?105/ml group,83.1,125.2,263.2 CFU/ml in 2.5?106/ml group and E.coli count of 12.9,29.4,37.3 CFU/ml in 5?105/ml group,26.5,55.2,65.2 CFU/ml in 2.5?106/ml group were detected at the end of bubble humidifier on three consecutive day respectively.There were no positive culture of bacteria at the end of bionic humidifier on three consecutive day respectively.The difference of S.aureaus and E.coli count between bubble and bionic humidifier on three consecutive day was significant(P
