The research is based on the submarine magnetic dipole model.The magnetic anomaly signal,which is detected by anti-submarine aircraft,is generated with Matlab.Then the signal is used to establish a database,and the detected signal can be compared to information of the database in time.The location of target submarine can be determined quickly.It is meaningful to improve the effectiveness of anti-submarine warfare.
We prepared a composite of aminooxy bifunctional molecules with graphene, which can decompose 91 mg of HCHO by 1 g of bifunctional molecules at room temperature with the only byproduct of water. Moreover, the composite can be regenerated under acidic conditions and 83.5% capacity is retained after 10 cycles.
CdTe/graphene/TiO2 films that served as photoanodes for cathodic protection application were prepared by an electrochemical deposition method. The deposition of graphene and CdTe nanoparticles (NPs) on the surface of the TiO2 nanotubes was confirmed by scanning electron microscope and transmission electron microscopy. The composites exhibited high light absorption in both the UV and visible light region. The results indicated that TiO2 nanotube photoelectrodes sensitized by 20-cycle graphene and 30-cycle CdTe NPs exhibited effective photocathodic protection properties for 304 stainless steel (304SS) under the visible-light illumination, with an photopotential of −750 mV versus saturated calomel electrode and a current density of 560 μA cm−2. Due to the efficient photogenerated charge separation, the three-component CdTe/graphene/TiO2 showed stronger photoresponse than pure TiO2 under visible-light illumination. In summary, the CdTe/graphene could improve the photocathodic protection properties of TiO2 films.
We put forward a modified Numerical Mode-Matching(NMM) method in detail which is used to simulate the responses of tilted-coil antenna arrays(TCAs) in a Transversely Isotropic(TI) formation,and the vertical eigenmodes are used to model the titled loop antenna sources for convenience.Moreover,the amplitude and slope basis functions are introduced into the simulation to speed up the calculation effectively.First of all,in order to validate the reliability and accuracy,the modeling results in a simple formation model by NMM are compared with those in the 3-D simulation of the analytic approach,also the modeling results in a complex formation of NMM are compared with those by a Finite Difference Time Domain(FDTD) method.They are both in a good agreement with each other.Based on this verification,TCAs and horizontal coil antenna in a transversely isotropic formation are studied,and it is shown from the computation results that TCAs are sensitive to the vertical resistivity and the horizontal resistivity together in TI formations but horizontal coil antenna are only sensitive to the horizontal resistivity.Therefore TCAs are very useful for evaluating a Transversely Isotropic formation.And then,the effects of the metallic mandrel on the responses are discussed,it is found that although the metallic mandrel does not change the trend of the phase and the amplitude change,it does influence the absolute value of the two signals and the effect is related to the normal directions.So we concluded that the effect of the metallic mandrel should not be neglected when TCAs are used to evaluate the formation.Finally,we discuss the effect of the different normal directions on the responses of TCAs,it shows that TCAs with different normal directions have different response characters due to the formation.In conclusion,TCAs have different responses as compared with the horizontal coil antenna,and we could use the various combinations of TCAs to evaluate the formation.
Abstract To obtain Cu/Al brazing materials with better overall performances, scanning electron microscopy, X-ray diffraction, and electrochemical testing were used to analyze the influences of trace Ag elements on the microstructure and properties of Zn − 22Al − xAg filler metals. The results show that the liquid phase temperature of Zn − 22Al − xAg is about 450°C, and the trace addition of the Ag element has little effect on the melting point of the filler metal. When the Ag content was varied from 0 − 1.2 wt.%, the reticulated eutectic crystals in the microstructure of as − cast Zn − 22Al − xAg gradually began to connect to form a larger reticulated structure, and the phenomenon of grain − boundary aggregation became more and more obvious in the extruded-state alloy. In addition, when the Ag content was 0.8 wt.%, the spreading area of the filler metal on the Cu plate increased by 30.45% compared with that without Ag. After brazing, the thickness of the compounds in the interfacial layer along the filler metals/Cu decreased significantly, the shape of the compounds was more regular, and the shear strength of the brazed joints reached the maximum value of 40.08 MPa, but the corrosion resistance of the filler metal was slightly decreased compared with that of the Zn-22Al at the same time.
Abstract Purpose It has been suggested that genetic polymorphisms in CYP19A1 gene were related to aromatase activity as well as circulating steroid hormone levels in postmenopausal women. Therefore, it is biologically reasonable that CYP19A1 rs1008805 (A/G) polymorphism may be associated with clinical outcome for hormone therapy. Methods Genotyping for CYP19A1 polymorphism rs1008805 was performed on 287 women with HR-positive early breast cancer. Associations were evaluated between CYP19A1 rs1008805 genotypes and disease-free survival (DFS). Results Based on the analysis of the whole cohort, no significant differences were observed between rs1008805 genotypes and DFS, 5-year DFS rate. However, in postmenopausal women, rs1008805 genotypes were significantly associated with DFS and 5-years DFS rate (AA versus AG versus GG: 89.2 months versus 58.2 versus 32.7 months; 55.9% versus 47.8% versus 0%; P = 0.019). In addition, when the population was subgrouped into two cohorts, women carrying GG variant have a poorer DFS, 5-years DFS rate (GG versus AA or AG: 32.7 months versus 70.6 months; 0% versus 52.1%; HR, 3.613; 95% CI,1.380-9.457; P = 0.005). Furthermore, being adjusted by patients features in multivariate analyses, GG genotype remained an independent prognostic factor for DFS (HR, 3.439; 95% CI, 1.251-9.456; P = 0.017). However, there was no significant differences in DFS and 5-years DFS rate between women harbor the minor allele and those with the homozygous common allele (AG or GG versus AA: 52.4 months versus 89.2 months; 41.0% versus 52.9%; HR, 1.288; 95% CI, 0.705-2.353; P = 0.408). In addition, there were no differences between rs1008805 polymorphisms and DFS among premenopausal women. Conclusions The homozygous minor allele (GG) of CYP19A1 rs1008805 is significantly associated with worse clinical outcome of hormone therapy in postmenopausal HR-positive early breast cancer patients. If confirmed, genotyping for CYP19A1 polymorphisms rs1008805 may provide predictive information for better selection of endocrine treatment. Citation Format: Wang X, Shao X, Zheng Y, Shi L, Huang Y. RS1008805 polymorphism in CYP19A1 gene is related to the efficacy of hormone therapy in early breast cancer. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P3-07-22.
The progresses and theoretical methodology of computer modeling of cathodic protection using the boundary element method (BEM) are outlined. To test the effectiveness and accuracy of BEM numerical modeling of cathodic protection for offshore structures, a miniature model offshore jacket with a sacrificial anode was built and put in a test pool full of seawater. Cathodic protection potentials on different positions were measured and compared with the values obtained from computer modeling. The results show good agreement between measured value and numerical simulated value. The factors that led to discrepancy in the two groups of data were discussed.
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