Tumor Classfication UsingG Automatic Multi-thresholding

In this paper we explore these math approaches for medical image applications. The application of the proposed method for detection tumor will be able to distinguish exactly tumor size and region. In this research, some major design and experimental results of tumor objects detection method for medical brain images is developed to utilize an automatic multi-thresholding method to handle this problem by combining the histogram analysis and the Otsu clustering. The histogram evaluations can decide the superior number of clusters firstly. The Otsu classification algorithm solves the given medical image by continuously separating the input gray-level image by multi-thresholding until reaching optimal smooth rate. The method solves exactly the problem of the uncertain contoured objects in medical image by using the Otsu clustering classification with automatic multi-thresholding operation.     

A longitudinal study of family obligation and depressive symptoms among Chinese American adolescents.

The purpose of this 2-year, 3-wave longitudinal study of Chinese American adolescents was to examine how family obligation behaviors and attitudes change over time; how gender, nativity, and birth order predict these trajectories; and whether family obligation relates to depressive symptoms. Findings suggest that family obligation behaviors decreased over the 2-year period but that family obligation attitudes were stable. Moreover, foreign-born adolescents reported higher levels of family obligation behavior than U.S.-born adolescents, and firstborn adolescents reported higher family obligation attitudes than laterborn adolescents. There were no gender differences in family obligation behaviors or attitudes. The findings also suggest that initial higher levels of family obligation were associated with subsequently fewer depressive symptoms. Finally, changes in family obligation behaviors related to changes in depressive symptoms over time such that increasing family obligation behaviors related to decreasing depressive symptoms. The results highlight the importance of understanding the role of family obligation to Chinese American adolescents’ mental health. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Soil strain-field and stability analysis of cut slope based on optical fiber measurement

A relatively small laboratory model of soil slope was constructed, and a special strain-sensing cable was embedded in the slope soil mass. The strain at different positions of the model slope was measured using pulse-prepump Brillouin optical time-domain analysis (PPP-BOTDA) technology during slope surface loading and slope cutting. The data measurements under loading were analyzed, and the co-deformation between the sensing cable and the artificial compacted soil mass is discussed. The results show that the specially designed strain sensing cable is co-deformed well with the soil after a loading of 225 kPa. The measurement data of the cut slope were analyzed in detail to elaborate the relationship between soil strain-field and slope stability. When the slope failed, the position of the sliding surface was coordinated with the strain anomaly area of the soil strain-field. A limit equilibrium analysis was then conducted to determine safety factors during slope cutting. This analysis allowed determination of the characteristic strains, reflecting the stability of the slope, which permitted the establishment of an empirical relationship between horizontal characteristic maximum strains and safety factors. The results were most effective in validating the use of the distributed optical fiber sensing technology for soil strain-field monitoring, for the purposes of evaluating slope stability and creating a warning system for landslides.     

时间取样相位调整的波束控制技术的研究

本文发展了一种用于宽带雷达阵成象的计算机化的时间取样相位调整技术。同时提出了检验时间取样所引起的误差的算法。对于周期阵,还利用FFT来加速成象数据处理。模拟结果和实验数据都表明此技术是可取的。     

Enhanced Magnetization in CoFe2O4 Through Hydrogen Doping

Magnetic spinel oxides have attracted extensive research interest due to their rich physics and wide range of applications. However, these materials invariably suffer suppressed magnetization, due to structural imperfections (e.g., disorder, anti-site defects, etc.). Herein, a dramatic enhanced magnetization is obtained with an increasement of 5 µ_B/u.c in CoFe₂O₄ (CFO) through ionic liquid gating induced hydrogen doping. The intercalated hydrogen ions lead to both distinct lattice expansion of ≈0.7% and notable Fe valence state reduction through electron doping, in which ≈17% Fe³⁺ is reduced into Fe²⁺. These facts collectively trigger a site-specific spin-flip on tetrahedrally coordinated Co²⁺ sites that enhances the net ferrimagnetic moment nearly to its theoretical maximum for perfect CFO.     

几种巧克力调温过程中的结晶特性研究

本文用X-衍射法（XRD）和差示扫描量热法（DSC）对香菇巧克力（LC），茶叶巧克力（TC）和对照样巧克力（CC）在调温工艺过程中的结晶特性进行了研究，发现3种巧克力在调温过程中的结晶行为各有其特性，这些特性在X-衍射（XRD）谱图中和热差法（DSC）熔解曲线上得到明显反映，LC和CC有相似的变化趋势，3种巧克力在浇模时所形成的晶相之熔点各不相同，LC为29.62℃,TC为21.93℃。CC为26.05℃，促霜试验表明：香菇和茶叶均有较好的延霜效果，其中香菇效果优于茶叶。