|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | THE EFFECTS OF THREE-DIMENSIONAL PENNY-SHAPED CRACKS ON ZONAL DISINTEGRATION OF THE SURROUNDING ROCK MASSES AROUND A DEEP CIRCULAR TUNNEL显示文摘In this study, it was assumed that three-dimensional penny-shaped cracks existed in deep rock masses. A new non-Euclidean model was established, in which the effects of pennyshaped cracks and axial in-situ stress on zonal disintegration of deep rock masses were taken into account. Based on the non-Euclidean model, the stress intensity factors at tips of the pennyshaped cracks were determined. The strain energy density factor was applied to investigate the occurrence of fractured zones. It was observed from the numerical results that the magnitude and location of fractured zones were sensitive to micro- and macro-mechanical parameters, as well as the value of in-situ stress. The numerical results were in good agreement with the experimental data. | Xiaoping Zhou Qihu Qian Hanfei Song | 2015 | Acta Mechanica Solida Sinica2015，28，6： | 2 |
| 2 | Simultaneously achieving high energy density and responsivity in submicron BaTiO_(3) film capacitors integrated on Si显示文摘In the research field of energy storage dielectrics,the“responsivity”parameter,defined as the recyclable/recoverable energy density per unit electric field,has become critically important for a comprehensive evaluation of the energy storage capability of a dielectric.In this work,high recyclable energy density and responsivity,i.e.,W_(rec)=161.1 J·cm^(-3) and ξ=373.8 J·(kV·m^(2))^(-1),have been simultaneously achieved in a prototype perovskite dielectric,BaTiO_(3),which is integrated on Si at 500℃ in the form of a submicron thick film.This ferroelectric film features a multi-scale polar structure consisting of ferroelectric grains with different orientations and inner-grain ferroelastic domains.A LaNiO_(3) buffer layer is used to induce a{001}textured,columnar nanograin microstructure,while an elevated deposition temperature promotes lateral growth of the nanograins(in-plane diameter increases from~10-20 nm at lower temperatures to~30 nm).These preferably oriented and periodically regulated nanograins have resulted in a small remnant polarization and a delayed polarization saturation in the film’s P-E behavior,leading to a high recyclable energy density.Meanwhile,an improved polarizability/dielectric constant of the BaTiO_(3) film has produced a much larger maximum polarization than those deposited at lower temperatures at the same electric field,leading to a record-breaking responsivity for this simple perovskite. | Jun Ouyang Yinxiu Xue Chuanqi Song Meiling Yuan Kun Wang Yuyao Zhao Hongbo Cheng Hanfei Zhu Chao Liu | 2024 | Journal of Advanced Ceramics2024，13，2： | 0 |
| 3 | Two New Mock Theta Double Sums显示文摘Recently, Zhang and Li presented five mock theta functions as q-hypergeometric double sums by using a Bailey pair. In this paper, employing the same Bailey pair, we further establish two new mock theta double sums in terms of Appell-Lerch sums and theta series.Indeed, identities between a new mock theta function and classical mock theta functions are obtained. | Jizhen YANG Hanfei SONG Zhizheng ZHANG | 2023 | Journal of Mathematical Research with Applications2023，43，2： | 0 |
| 4 | Imaging Manifestation and Treatment of Nephroblastoma显示文摘Neonoblastoma is also known as renal embryos, Wilms tumor, originated in the undifferentiated posterior renal embryo base, can form a variety of components of the kidney. It shows Kidney cell tumor accounts for more than 80% of children under 15 years of age with malignant genitourinary tumors, accounting for about 8% of children's solid tumors. Statistics of domestic 6 pediatric hospital 2133 cases of malignant solid tumors, there are 503 cases of nephroblastoma (24%), the diagnosis of age 1 to 5 years old accounted for 75%, the highest age is 1 to 3 years old, the average age is 3.1 year old. 90% of cases diagnosed when the age is less than 7 years old, rare in adults and newborns. Male and female gender and left and right side of the same, bilateral accounted for 1.4% to 10.3%, the average age of diagnosis is 15 months. Abdominal mass is the most common symptoms, about 75% of patients with abdominal mass or abdominal distension treatment. As the lumps at a later time do not affect the nutritional and health of children, and no other symptoms, so more because parents give their children bath or dressing was accidental discovery, and often not the parents attention and delay treatment. Late tumor increased, children by huge tumor oppression, may have shortness of breath, loss of appetite, weight loss, irritability phenomenon. Gross hematuria rare, but microscopic hematuria can be as high as 25%. 25% to 63% of patients may have high blood pressure performance. A very small number of nephroblastoma spontaneous ulceration, clinical manifestations similar to acute abdomen. This study aims to investigate the imaging findings of B-ultrasonography, CT and MRI in nephroblastoma. Methods: Eight patients were examined by this study, and the lesion size, edge, internal structure and enhancement were observed. The results of the examination have the same, but the degree of display and subtle structure is diff erent. Through medical images can be on the examination of the disease can make a diagnosis, MR the most diagnostic value. Comprehensive data can signifi cantly improve the diagnostic accuracy. | Dapeng Song Zhong Chen Hanfei Ran | 2018 | Medical Imaging Process & Technology2018，1，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员