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基于CSPH法的含裂纹弹性板动力变形分析
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作者 李泽敏 《科学技术与工程》 北大核心 2014年第32期117-120,共4页
针对传统光滑粒子流体动力学(smoothed particle hydrodynamics,SPH)法在计算过程中出现的边界缺陷不利影响;以及离散粒子分布不均匀时带来的精度和稳定性误差问题,采用一种对SPH方法的核近似式和粒子近似式进行正则化处理的修正SPH法(C... 针对传统光滑粒子流体动力学(smoothed particle hydrodynamics,SPH)法在计算过程中出现的边界缺陷不利影响;以及离散粒子分布不均匀时带来的精度和稳定性误差问题,采用一种对SPH方法的核近似式和粒子近似式进行正则化处理的修正SPH法(CSPH),模拟了二维的弹性板在拉伸和剪切两种荷载形式作用下的动力响应问题,成功解决了张力不稳定导致的数值发散问题。计算结果表明CSPH法在计算弹性问题时具有较好的稳定性和合理性,为今后进一步分析弹性板的裂纹扩展问题提供了良好的研究手段。 展开更多
关键词 csph方法 固体力学 数值仿真 动力响应
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亚砷酸钠抑制柑橘果实柠檬酸积累的机制 被引量:2
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作者 叶丽 杨俊枫 +6 位作者 李民华 李泽航 马小川 常媛媛 尹韬 盛玲 卢晓鹏 《湖南农业大学学报(自然科学版)》 CAS CSCD 北大核心 2023年第5期549-557,共9页
以亚砷酸钠(NaAsO_(2))溶液(含6.16 g/L MgSO4·7H2O、1 mL/L Triton X–100、0.17 g/L NaAsO_(2))喷施处理‘山下红’温州蜜柑、‘橘湘早’温州蜜柑、‘大红甜橙’树体,离体处理‘冰糖橙’汁胞(MS培养基含1.0 mg/L NaAsO_(2))及愈... 以亚砷酸钠(NaAsO_(2))溶液(含6.16 g/L MgSO4·7H2O、1 mL/L Triton X–100、0.17 g/L NaAsO_(2))喷施处理‘山下红’温州蜜柑、‘橘湘早’温州蜜柑、‘大红甜橙’树体,离体处理‘冰糖橙’汁胞(MS培养基含1.0 mg/L NaAsO_(2))及愈伤组织(MS培养基含0.5、1.0 mg/L NaAsO_(2)),测定可溶性固形物(TSS)、苹果酸和柠檬酸的含量,分析CsAN1和CsPH8基因的表达及其启动子活性。结果表明:NaAsO_(2)可有效降低果实、汁胞和愈伤组织的柠檬酸含量;NaAsO_(2)处理后,‘山下红’‘橘湘早’和‘大红甜橙’果实柠檬酸含量分别较对照降低4.59%~61.57%、0.67%~14.92%、13.22%~54.35%;NaAsO_(2)处理60 d的‘橘湘早’果实中CsAN1和CsPH8的表达量分别下降73%和32%,在NaAsO_(2)处理21 d的‘冰糖橙’汁胞中的表达量分别降低55%和27%,在0.5 mg/L NaAsO_(2)处理20 d的‘冰糖橙’愈伤组织中分别降低73%和84%;启动子区域缺失试验结果表明,干旱信号可能作用在CsAN1和CsPH8启动子的ABRE元件上,并调控它们的表达,NaAsO_(2)处理后含有ABRE元件的启动子区段活性明显减弱,推测NaAsO_(2)抑制了柑橘中CsAN1和CsPH8启动子活性进而降低其表达,从而减弱了柠檬酸在果实中的积累。 展开更多
关键词 柑橘 亚砷酸钠 柠檬酸 基因表达 启动子活性 CsAN1 csph8
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Never change a winning team-liver stiffness measurement and platelet count as key surrogates for clinically significant portal hypertension
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作者 Georg Semmler Mathias Jachs Mattias Mandorfer 《Hepatobiliary Surgery and Nutrition》 2025年第6期1016-1019,共4页
Carvedilol is recommended in patients with compensated advanced chronic liver disease(cACLD)and clinically significant portal hypertension(CSPH)to prevent hepatic decompensation(1).However,as hepatic venous pressure g... Carvedilol is recommended in patients with compensated advanced chronic liver disease(cACLD)and clinically significant portal hypertension(CSPH)to prevent hepatic decompensation(1).However,as hepatic venous pressure gradient(HVPG)measurement,the minimally invasive gold standard for the diagnosis of CSPH,is not broadly available,decision rules based on non-invasive tests(NITs)are needed(2). 展开更多
关键词 compensated advanced chronic liver disease cacld platelet count compensated advanced chronic liver disease liver stiffness minimally invasive gold standard clinically significant portal hypertension csph CARVEDILOL hepatic decompensation howeveras
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Surgical resection for hepatocellular carcinoma in cirrhotic patients with clinically significant portal hypertension:a multidisciplinary team decision
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作者 José M.Tellado 《Hepatobiliary Surgery and Nutrition》 2025年第3期494-496,共3页
At the beginning of the 21st century,in a global attempt to guide and organize the treatment of hepatocellular carcinoma(HCC),which had reached 7th place as the most frequent cancer due to the historical coincidence o... At the beginning of the 21st century,in a global attempt to guide and organize the treatment of hepatocellular carcinoma(HCC),which had reached 7th place as the most frequent cancer due to the historical coincidence of three confluent pandemics worldwide(alcoholism,obesity and viral hepatitis),several HCC classification proposals arose,among them,the one elaborated by Llovet et al.,members of the Liver Unit of Barcelona Clinic Hospital,who published the first version of the Barcelona Clinic Liver Cancer(BCLC)in 1999. 展开更多
关键词 Hepatocellular carcinoma(HCC) liver resection(LR) Barcelona Clinic Liver Cancer staging(BCLC staging) direct measurement of clinically significant portal hypertension(direct measurement of csph)
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Relationship between portal hypertension and liver stiffness measurements in the treatment of hepatocellular carcinoma from the surgeon’s point of view in the Baveno VII era
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作者 Nobuyuki Takemura Norihiro Kokudo 《Hepatobiliary Surgery and Nutrition》 SCIE 2024年第1期150-153,共4页
Hepatocellular carcinoma(HCC)is the third leading cause of cancer-related deaths worldwide(1).It often arises from the backgrounds of damaged liver due to viral hepatitis,alcoholic,or non-alcoholic liver disease.Altho... Hepatocellular carcinoma(HCC)is the third leading cause of cancer-related deaths worldwide(1).It often arises from the backgrounds of damaged liver due to viral hepatitis,alcoholic,or non-alcoholic liver disease.Although the proportion of patients with HCC of non-hepatitis B and C origins has increased in recent years,hepatitis B and C viruses still cause more than half of all carcinogenesis in patients with HCC(2).Patients with HCC often develop portal hypertension(PHT)from cirrhosis due to the deterioration of the background liver,which proves to be the greatest obstacle to various types of treatments for HCC. 展开更多
关键词 Hepatocellular carcinoma(HCC) portal hypertension(PHT) Baveno VII HEPATECTOMY clinically significant portal hypertension(csph)
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