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国际医学放射学杂志 2024年第5期 623-624页

作者： M.C.Langenbach I.L.Langenbach B.Foldyna V.Mauri k.klein S.Macherey-Meyer 苗彦许振华

目的冠状动脉疾病（CAD）常与严重主动脉瓣狭窄（AS）并存。经导管主动脉瓣置换术（TAVR）前行CT血管成像（CTA）虽可排除此类病人的CAD阻塞性病变，但对于

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Editorial

Defence Technology（防务技术） 2015年第3期11卷 185-186页

作者： k.Prasad Rao University of UTAH

Joining of materials is indeed an important aspect for both designers and *** reasons for joining are functional,structural and cost *** other technique is as widely used as welding to join materials efficiently and a... 详细信息

关键词：焊接材料编辑产品附加值机械连接制造商设计者钎焊粘接

Recovery of serum testosterone following neoadjuvant and adjuvant androgen deprivation therapy in men treated with prostate brachytherapy

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World Journal of Radiology 2015年第12期7卷 494-500页

作者： Hideyasu Tsumura Takefumi Satoh Hiromichi Ishiyama Shuhei Hirano kenichi Tabata Shinji kurosaka kazumasa Matsumoto Tetsuo Fujita Masashi kitano Shiro baba kazushige Hayakawa Masatsugu Iwamura Department of Urology Kitasato University School of Medicine Department of Radiation Oncology Kitasato University School of Medicine

AIM: To investigate the time course of testosterone(T) recovery after cessation of androgen deprivation therapy(ADT) in patients treated with brachytherapy. METHODS: One-hundred and seventy-four patients treated between June 1999 and February 2009 were studied. Patients were divided into a short-term usage group(≤ 12 mo, n = 91) and a long-term usage group(≥ 36 mo, n = 83) according to the duration of gonadotropin-releasing hormone agonist therapy. Median follow-up was 29 mo in the short-term group and was 60 mo in the long-term ***: Cumulative incidence rates of T recovery to normal and supracastrate levels at 24 mo after cessationwere 28.8% and 74.6%, respectively, in the long-term usage group, whereas these values were 96.4% and 98.8% in the short-term usage group. T recovery to normal and supracastrate levels occurred significantly more rapidly in the short-term than in the long-term usage group(P < 0.001 and P < 0.001, respectively). Five years after cessation, 22.6% of patients maintained a castrate T level in the long-term usage group. On multivariate analysis, lower T levels(< 10 ng/d L) at cessation of ADT was significantly associated with prolonged T recovery to supracastrate levels in the longterm usage group(P = 0.002). CONCLUSION: Lower T levels at cessation of ADT were associated with prolonged T recovery in the longterm usage group. Five years after cessation of longterm ADT, approximately one-fifth of patients still had castrate T levels. When determining the therapeutic effect, especially biochemical control, we should consider this delay in T recovery.

关键词： Androgen deprivation Gonadotropinreleasing hormone agonist Prostate brachytherapy Prostate cancer Testosterone

A Novel Image Encryption Technique Based on Inter Block Difference

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Journal of Shanghai Jiaotong university(Science) 2021年第4期26卷 488-493页

作者： THAMANAM Srinivasa Rao Potti Nagaraja B.Balaji Naik k.Manjunathachari Department of EECE Gandhi Institute of Technology and ManagementHyderabadTelangana502329India

Data security plays a vital role in the current scenario due to the advanced and sophisticated data access techniques. Present development in data access is always a threat to data that are stored in electronic devices. Among all the forms of data, image is an important aspect that still needs methodologies to be stored securely. This work focuses on a novel technique to secure images using inter block difference and advanced encryption standard (AES). The AES algorithm is chosen for encryption since there is no prevalent attack that is successful in analyzing it. Instead of encrypting the entire image, only a part of the image is encrypted. The proposed work is found to reduce the encryption overhead in a significant way and at the same time preserves the safety of the image. It is also observed that the decryption is done in an efficient and time preserving manner.

关键词： encryption decryption inter block difference advanced encryption standard(AES)

Numerical Study on Rising Dynamics and Coalescence of Bubbles

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Numerical Study on Rising Dynamics and Coalescence of Bubble...

作者： Christian k Y Mulbah 江苏大学

学位级别：硕士

气泡在黏性液体中上升时中表现出的动力学特征是多个工程领域关注的热点问题。本文借助计算流体动力学(CFD)方法和流体体积(VOF)多相流模型,对单气泡和多气泡上升过程进行了二维和三维数值模拟,对数值模型进行了有效性验证。在第一项研... 详细信息

气泡在黏性液体中上升时中表现出的动力学特征是多个工程领域关注的热点问题。本文借助计算流体动力学(CFD)方法和流体体积(VOF)多相流模型,对单气泡和多气泡上升过程进行了二维和三维数值模拟,对数值模型进行了有效性验证。在第一项研究工作中,对在去离子水中上升中的甲烷(CH)气泡进行了研究,将去离子水的压强和温度分别设为13 MPa和5℃,选择CH气泡的直径范围为3.0 mm–6.0 mm。数值模拟结果表明:在高压和低温条件下,气泡轨迹、瞬时液体速度分布和气泡的尾流结构表现出独特的特征,气泡尾流中出现了复杂的旋涡结构。相对于常温常压环境,在高压和低温去离子水中的气泡速度较低。对气泡行为进行了无量纲分析,结果表明气泡直径显著影响其阻力系数。将去离子水和海水中的气泡行为进行了系统的对比分析,发现在13 MPa和5℃的去离子水中,气泡的上升特性更为复杂,直径为4.5 mm和6.0 mm的气泡附近出现明显的旋涡。在第二项研究工作中,采用三维非定常多相流动数值模拟研究了多气泡的上升过程。考虑了气泡尺寸对气泡上升行为和相互作用的影响,气泡尺寸范围为4.0 mm–10.0 mm。研究了同轴双气泡和三角形初始气泡排列方式。借助实验结果对数值模拟方案的有效性进行了验证。通过数值模拟获得了气泡几何形状随时间的变化、气泡速度和气泡附近的流动结构。结果表明,流动结构与气泡形状和上升相匹配;相对于同轴排列方式,侧向气泡的参与导致气泡间的聚并延迟。对于小尺寸气泡,第一次聚并发生在位于下方的两个气泡之间;随着气泡尺寸的增加,第一次聚并出现在上气泡和左下气泡之间;新形成的气泡的上升速度迅速下降,并且其形状在很大程度上与聚并前的单气泡有关。

关键词：甲烷气泡气泡轨迹气泡尺寸横向力气泡尾流 VOF模型

SEARCHES FOR QUARk AND LEPTON COMPOSITENESS

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Chinese Physics C 2016年第10期40卷 884-890页

作者： k. Hikasa M. Tanabashi k. Terashi N. Varelas Tohoku University Nagoya University University of Tokyo University of Illinois at Chicago

Limits on contact interactions If quarks and leptons are made of constituents, then at the scale of constituent binding energies there should appear new interactions among them. At energies much below the compositeness scale （∧）, these interactions are suppressed by inverse powers of A. The dominant effect of the compositeness of fermion φ should come from the lowest dimensional interactions with four fermions （contact terms）,

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Effective Medium Approximation for Nonlinear Composite Media

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Journal of Materials Science & Technology 1993年第2期9卷 145-147页

作者： k.W.Yu Department of Physics Chinese University of Hong Kong Shatin New Territories Hong Kong

We build the perturbation expansion method for nonlinear composite media and extend the EMA for nonlinear effective conductivity. Using the solutions of boundary-value problems of a cylindrical in- clusion, we derive ... 详细信息

关键词： effective medium approximation composite

SULFONATED POLYPHENYLENE-SULFIDE AS LI GANDS IN RH-COMPLEXES CATALYZED HYDROFORMYLATION

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Chinese Chemical Letters 1993年第2期4卷 163-166页

作者： k.R.TSAI Department of Chemistry & Institute of Physical Chemistry Xiamen University Xiamen 361006

Sulfonated polyphenylene-sulfide(SPPS)was used as ligands in place of phosphine in Rh-complexes to yield a water-soluble catalyst for hydroformylation of higher olefins in two phasic *** decreasing catalytic activities and increasing n/b ratios(normal to branch aldehyde ratios)have been found respectively with increasing molar ratios of SPPS to rhodium,and with lowering of reaction temperature,indicating more or less coordinations between thioether sulfides and Rh species in SPPS-Rh compounds,The coordinations were also evidenced by a weak Reman hand observation of the SPPS-Rh compounds at 264 cm^(-1).

关键词： SPPS SULFONATED POLYPHENYLENE-SULFIDE AS LI GANDS IN RH-COMPLEXES CATALYZED HYDROFORMYLATION

Formation and control of nitrogenous DBPs from Western Australian source waters: Investigating the impacts of high nitrogen and bromide concentrations

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Journal of Environmental Sciences 2017年第8期29卷 102-115页

作者： Ina kristiana Deborah Liew Rita k.Henderson Cynthia A.Joll kathryn L.Linge Curtin Water Quality Research Centre Department of Chemistry Curtin University School of Chemical Engineering University of New South Wales

We studied the formation of four nitrogenous DBPs（N-DBPs） classes（haloacetonitriles,halonitromethanes, haloacetamides, and N-nitrosamines）, as well as trihalomethanes and total organic halogen（TOX）, after chlorination or chloramination of source waters. We also evaluated the relative and additive toxicity of N-DBPs and water treatment options for minimisation of N-DBPs. The formation of halonitromethanes, haloacetamides, and N-nitrosamines was higher after chloramination and positively correlated with dissolved organic nitrogen or total nitrogen. N-DBPs were major contributors to the toxicity of both chlorinated and chloraminated waters. The strong correlation between bromide concentration and the overall calculated DBP additive toxicity for both chlorinated and chloraminated source waters demonstrated that formation of brominated haloacetonitriles was the main contributor to toxicity. Ozone–biological activated carbon treatment was not effective in removing N-DBP precursors. The occurrence and formation of N-DBPs should be investigated on a case-by-case basis, especially where advanced water treatment processes are being considered to minimise their formation in drinking waters, and where chloramination is used for final disinfection.

关键词： Haloacetonitriles Haloacetamides Halonitromethanes N-nitrosamines Chlorination Chloramination

Iron,HCV and the liver

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World Journal of Gastroenterology 1997年第2期3卷 4-6页

作者： k.P.Maier kP Maier MD Department of Medicine Division of Gastroenterology City Hospital Esslingen Acad. Department of University of Tuebingen Germany.

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Ｉｒｏｎ，ＨＣＶａｎｄｔｈｅｌｉｖｅｒＫ．Ｐ．ＭａｉｅｒＳｕｂｊｅｃｔｈｅａｄｉｎｇｓＩｒｏｎ；ｈｅｐａｔｉｔｉｓＣｖｉｒｕｓ；ｌｉｖｅｒ；ｈｅｐａｔｉｔｉｓＣＩＲＯＮＩｒｏｎｓｅｒｖｅｓａｓａｎｅｓｅｎｔｉａｌｍｅｔａｌｆｏｒｔｈｅｓｕｒｖｉｖａｌ...

关键词： Hepatitis C Hepatitis C virus Iron Liver