检索结果-南通市图书馆

Effect of CaO content on residual stress of CAS glass-ceramic

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2006年第B01期16卷 101-104页

作者： XIE Jun CHENG Jin-shu long Xin-jiang yang shu-zhen Key Laboratory of Silicate Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China

The mismatch in thermal expansion coefficient between crystalline phase and glass phase can result in large thermal stresses during thermal processing, as well as the low thermal conductivity, which is the most troublesome in the production of the CaO-Al2O3-SiO2 glass-ceramic. CaO content may influence the residual stress in the system. Therefore X-ray diffraction (XRD) ‘sin2ψ’ method was used to calculate the residual stress in samples containing various contents of CaO. The relationship between CaO content and residual stress in CAS system was investigated. Finally reasons causing such residual stress were analyzed.

关键词： CAS玻璃陶瓷氧化钙含量残余应力晶相玻璃相

维普期刊数据库

Sleep disorders in Alzheimer’s disease:the predictive roles and potential mechanisms

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2021年第10期16卷 1965-1972页

作者： Huang Kuang Yu-Ge Zhu Zhi-Feng Zhou Mei-Wen yang Fen-Fang Hong shu-long yang Department of Physiology College of MedicineNanchang UniversityNanchangJiangxi ProvinceChina Department of Nurse Nanchang University HospitalNanchangJiangxi ProvinceChina Department of Experimental Teaching Center Nanchang UniversityNanchangJiangxi ProvinceChina

Sleep disorders are common in patients with Alzheimer’s disease,and can even occur in patients with amnestic mild cognitive impairment,which appears before Alzheimer’s *** disorders further impair cognitive function and accelerate the accumulation of amyloid-βand tau in patients with Alzheimer’s *** present,sleep disorders are considered as a risk factor for,and may be a predictor of,Alzheimer’s disease *** that sleep disorders are encountered in other types of dementia and psychiatric conditions,sleep-related biomarkers to predict Alzheimer’s disease need to have high specificity and ***,we summarize the major Alzheimer’s disease-specific sleep changes,including abnormal non-rapid eye movement sleep,sleep fragmentation,and sleep-disordered breathing,and describe their ability to predict the onset of Alzheimer’s disease at its earliest *** the mechanisms underlying these sleep changes is also crucial if we are to clarify the role of sleep in Alzheimer’s *** paper therefore explores some potential mechanisms that may contribute to sleep disorders,including dysregulation of the orexinergic,glutamatergic,andγ-aminobutyric acid systems and the circadian rhythm,together with amyloid-β*** review could provide a theoretical basis for the development of drugs to treat Alzheimer’s disease based on sleep disorders in future work.

关键词： Alzheimer’s disease amyloid-βaccumulation circadian rhythm GABAergic system glutamatergic system non-rapid eye movement sleep orexinergic system sleep disorders sleep fragmentation sleep-disordered breathing

维普期刊数据库

New progress in roles of nitric oxide during hepatic ischemia reperfusion injury

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2017年第14期23卷 2505-2510页

作者： Ya-Qi Zhang Ning Ding Yong-Fen Zeng Yuan-Yuan Xiang Mei-Wen yang Fen-Fang Hong shu-long yang Department of Physiology Basic Medical CollegeNanchang University Medical Experimental Teaching Center Jiangxi Medical CollegeNanchang University

Hepatic ischemia reperfusion injury (HIRI) is a clinical condition which may lead to cellular injury and organ dysfunction. The role of nitric oxide (NO) in HIRI is complicated and inconclusive. NO produced by endothelial nitric oxide synthase (eNOS) activation plays a protective role during early HIRI. But eNOS overexpression and the resulting excessive NO bioavailability can aggravate liver injury. NO induced by inducible nitric oxide synthase (iNOS) may have either a protective or a deleterious effect during the early phase of HIRI, but it may protect the liver during late HIRI. Here, we reviewed the latest findings on the role of NO during HIRI: (1) NO exerts a protective effect against HIRI by increasing NO bioavailability, downregulating p53 gene expression, decreasing inflammatory chemokines, reducing ROS via inhibiting the mitochondrial respiratory chain, activating sGC-GTP-cGMP signal pathway to reduce liver cell apoptosis, and regulating hepatic immune functions; (2) eNOS protects against HIRI by increasing NO levels, several eNOS/NO signal pathways (such as Akt-eNOS/NO, AMPK-eNOS/NO and HIF-1 alpha-eNOS/NO) participating in the anti-HIRI process, and inhibiting over-expression of eNOS also protects against HIRI; and (3) the inhibition of iNOS prevents HIRI. Thus, the adverse effects of NO should be avoided, but its positive effect in the clinical treatment of diseases associated with HIRI should be recognized.

关键词： Liver Hepatic ischemia reperfusion injury Nitric oxide Nitric oxide synthase

New progress in understanding roles of nitric oxide during hepatic ischemia-reperfusion injury

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Hepatology 2022年第3期14卷 504-515页

作者： Yi-Ping Zhang Xin-Ran Liu Mei-Wen yang shu-long yang Fen-Fang Hong Experimental Center of Pathogen Biology College of MedicineNanchang UniversityNanchang 330006Jiangxi ProvinceChina Department of Surgery Fuzhou Medical CollegeNanchang UniversityFuzhou 344000Jiangxi ProvinceChina Department of Physiology College of MedicineNanchang UniversityNanchang 330006Jiangxi ProvinceChina Department of Physiology Fuzhou Medical CollegeNanchang UniversityFuzhou 344000Jiangxi ProvinceChina

Hepatic ischemia-reperfusion injury(HIRI)is a major clinical cause of morbidity and mortality in liver surgery and *** studies have found that nitric oxide(NO)plays an important role in the HIRI and its increase or decrease can affect the progression and outcome of ***,the role of NO in HIRI is controversial and *** derived by endothelial NO synthase(eNOS)shows a protective role in HIRI,while excessive NO derived by inducible NO synthase(iNOS)accelerates inflammation and increases oxidative stress,further aggravating ***,the overexpression of eNOS may exacerbate HIRI and iNOS-derived NO in some cases reduces *** we review the new progress in the understanding of the roles of NO during HIRI:(1)NO possesses different roles in HIRI by increasing NO bioavailability,down-regulating leukotriene C4 synthase,inhibiting the activation of the nuclear factorκB(NFκB)pathway,enhancing cell autophagy,and reducing inflammatory cytokines and reactive oxygen species(ROS).And NO has both protective and deleterious effects by regulating apoptotic factors;(2)eNOS promotes NO production and suppresses its own overexpression,exerting a hepatoprotective effect *** activation is regulated by the PI3K/Akt and KLF2/AMPK pathways;and(3)iNOS derived NO mainly has deteriorating effects on HIRI,while it may have a protective function under some *** expression should reach a balance to reduce the adverse side and make NO protective in the treatment of ***,it can be inferred that NO modulating drugs may be a new direction in the treatment of HIRI or may be used as an adjunct to mitigate HIRI for the purpose of protecting the liver.

关键词： Hepatic ischemia-reperfusion injury Nitric oxide Endothelial nitric oxide synthase Inducible nitric oxide synthase

Effects of apoptosis on liver aging

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2019年第6期7卷 691-704页

作者： Shao-Jie Hu Sha-Sha Jiang Jin Zhang Dan Luo Bo Yu Liang-Yan yang Hua-Hua Zhong Mei-Wen yang Li-Yu Liu Fen-Fang Hong shu-long yang Department of Physiology College of MedicineNanchang University Department of Nurse Nanchang University Hospital Experimental Teaching Center Nanchang University

As an irreversible and perennial process,aging is accompanied by functional and morphological declines in organs. Generally,aging liver exhibits a decline in volume and hepatic blood flow. Even with a preeminent regenerative capacity to restore its functions after liver cell loss,its biosynthesis and metabolism abilities decline,and these are difficult to restore to previous standards. Apoptosis is a programmed death process via intrinsic and extrinsic pathways,in which Bcl-2 family proteins and apoptosis-related genes,such as p21 and p53,are *** inflicts both favorable and adverse influences on liver *** eliminates transformed abnormal cells but promotes age-related liver diseases,such as nonalcoholic fatty liver disease,liver fibrosis,cirrhosis,and liver cancer. We summarize the roles of apoptosis in liver aging and age-related liver diseases.

关键词： Apoptosis Liver aging Oxidative stress Caloric restriction Cirrhosis

Response of runoff and its components to climate change in the Manas River of the Tian Shan Mountains

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Climate Change Research 2024年第1期15卷 62-74页

作者： Ze-long yang Peng BAI Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 10010lChina University of Chinese Academy of Sciences Beijing 100049China

A warming-wetting climate trend has led to increased runoff in most watersheds in the Tian Shan Mountains over the past few ***,it remains unclear how runoff components,that is,rainfall runoff(Rrain),snowmelt runoff(Rsnow),and glacier meltwater(Rglacier),responded to historical climate change and how they will evolve under future climate change ***,we used a modified Hydrologiska Byrans Vattenbalansavdelning(HBV)model and a detrending method to quantify the impact of precipitation and temperature changes on runoff components in the largest river(Manas River)on the northern slope of the Tian Shan Mountains from 1982 to 2015.A multivariate calibration strategy,including snow cover,glacier area,and runoff was implemented to constrain model parameters associated with runoff *** downscaled outputs of 12 general circulation models(GCMs)from the Sixth Coupled Model Intercomparison Project(CMIP6)were also used to force the modified HBV model to project the response of runoff and its components to future(2016-2100)climate change under three common socio-economic pathways(SSP126,SSP245,and SSP585).The results indicate that Rrain dominates mean annual runoff with a proportion of 42%,followed by Rsnow(37%)and Rglacier(21%).In terms of inter-annual variation,Rrain and Rsnow show increasing trends(0.93(p0.05)mm per year),while Rglacier exhibits an insignificant(p>0.05)decreasing trend(-0.12 mm per year),leading to an increasing trend in total runoff(1.12 mm per year,p>0.05).The attribution analysis indicates that changes in precipitation and temperature contribute 8.16 and 10.37 mm,respectively,to the increase in runoff at the mean annual *** wetting(increased precipitation)increases Rrain(5.03 mm)and Rsnow(3.19 mm)but has a limited effect on Rglacier(-0.06 mm),while warming increases Rrain(10.69 mm)and Rglacier(5.79 mm)but decreases Rsnow(-6.12 mm).The negative effect of glacier shrinkage on Rglacier has outweighed the

关键词： Tian Shan Rainfall runoff Snowmelt runoff Glacier meltwater Warming-wetting Tipping point

Evolutionary dynamics of tax-based strong altruistic reward andpunishment in a public goods game

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第9期33卷 247-257页

作者： Zhi-Hao yang Yan-long yang Mathematics and Statistics School Guizhou UniversityGuiyang 550025China

In public goods games, punishments and rewards have been shown to be effective mechanisms for maintaining individualcooperation. However, punishments and rewards are costly to incentivize cooperation. Therefore, the generation ofcostly penalties and rewards has been a complex problem in promoting the development of cooperation. In real society,specialized institutions exist to punish evil people or reward good people by collecting taxes. We propose a strong altruisticpunishment or reward strategy in the public goods game through this phenomenon. Through theoretical analysis and numericalcalculation, we can get that tax-based strong altruistic punishment (reward) has more evolutionary advantages thantraditional strong altruistic punishment (reward) in maintaining cooperation and tax-based strong altruistic reward leads toa higher level of cooperation than tax-based strong altruistic punishment.

关键词： evolutionary game theory strong altruism punishment reward

维普期刊数据库

Online distributed optimization with stochastic gradients:high probability bound of regrets

在线全文

学校读者我要写书评

暂无评论

Control Theory and Technology 2024年第3期22卷 419-430页

作者： Yuchen yang Kaihong Lu long Wang Center for Systems and Control College of EngineeringPeking UniversityBeijing 100871China College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590ShandongChina

In this paper,the problem of online distributed optimization subject to a convex set is studied via a network of *** agent only has access to a noisy gradient of its own objective function,and can communicate with its neighbors via a *** handle this problem,an online distributed stochastic mirror descent algorithm is *** works on online distributed algorithms involving stochastic gradients only provide the expectation bounds of the *** from them,we study the high probability bound of the regrets,i.e.,the sublinear bound of the regret is characterized by the natural logarithm of the failure probability's *** mild assumptions on the graph connectivity,we prove that the dynamic regret grows sublinearly with a high probability if the deviation in the minimizer sequence is sublinear with the square root of the time ***,a simulation is provided to demonstrate the effectiveness of our theoretical results.

关键词： Distributed optimization Online optimization Stochastic gradient High probability

An analytical model to estimate the time delay to reach spontaneous ignition considering heat loss in oil reservoirs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum Science 2024年第4期21卷 2469-2474页

作者： James J.Sheng Er-long yang College of Petroleum Engineering Northeast Petroleum University

During air injection into an oil reservoir, an oxidation reaction generates some heat to raise the reservoir temperature. When the reservoir temperature reaches an ignition temperature, spontaneous ignition occurs. There is a time delay from the injection to ignition. There are mixed results regarding the feasibility of spontaneous ignition in real-field projects and in laboratory experiments. No analytical model is available in the literature to estimate the oxidation time required to reach spontaneous ignition with heat *** paper discusses the feasibility of spontaneous ignition from theoretical points and experimental and field project observations. An analytical model considering heat loss is proposed. Analytical models with and without heat loss investigate the factors that affect spontaneous ignition. Based on the discussion and investigations, we find that it is more difficult for spontaneous ignition to occur in laboratory experiments than in oil reservoirs; spontaneous ignition is strongly affected by the initial reservoir temperature, oil activity, and heat loss; spontaneous ignition is only possible when the initial reservoir temperature is high, the oil oxidation rate is high, and the heat loss is low.

关键词： Spontaneous ignition Time delay Air injection Heat loss Low temperature oxidation Combustion