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Effect analysis of the intentional depressurization on fission product behavior during TMLB' severe accident

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Nuclear Science and Techniques 2009年第6期20卷 373-379页

作者： HUANG Gaofeng LI Jingxi TONG lili cao Xuewu School of Mechanical Engineering Shanghai Jiaotong University Shanghai 200240 China

It has been found that the pressure in the reactor coolant system (RCS) remains high in some severe accident sequences at the time of reactor vessel failure, with the risk of causing direct containment heating (DCH). Intentional depressurization is an effective accident management strategy to prevent DCH or to mitigate its consequences. Fission product behavior is affected by intentional depressurization, especially for inert gas and volatile fission product. Because the pressurizer power-operated relief valves (PORVs) are latched open, fission product will transport into the containment directly. This may cause larger radiological consequences in containment before reactor vessel failure. Four cases are selected, including the TMLB' base case and the opening one, two and three pressurizer PORVs. The results show that inert gas transports into containment more quickly when opening one and two PORVs, but more slowly when opening three PORVs; more volatile fission product deposit in containment and less in reactor coolant system (RCS) for intentional depressurization cases. When opening one PORV, the phenomenon of revaporization is strong in the RCS.

关键词：裂变产物控制产品严重事故减压故意行为反应堆冷却剂系统雷达散射截面

Model comparisons on molten core-concrete interactions

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Nuclear Science and Techniques 2009年第4期20卷 251-256页

作者： TONG lili cao Xuewu LI Jingxi YANG Yajun School of Nuclear Science and Engineering Shanghai Jiaotong University Shanghai 200240 China

Based on the plant model of 600-MW PWR,the molten core-concrete interactions(MCCI) under different models are *** blackout (SBO) with steam-driven auxiliary feed water pump failure is selected as the case for the model comparisons *** result shows that thermal resistance model between debris and concrete has much influence on the consequence of *** concrete erosion rate calculated with gas film model is much higher than that of slag film *** other model comparisons such as the chemical reaction heat and the configuration molten pool are also discussed.

关键词：压水反应堆核技术 MCCI PWR

Structure induced wide range wettability:Controlled surface of micro-nano/nano structured copper films for enhanced interface

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Journal of Materials Science & Technology 2021年第25期84卷 147-158页

作者： lili cao Bingwei Luo Hongli Gao Min Miao Tao Wang Yuan Deng Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument &Information Microsystem InstituteBeijing Information Science and Technology UniversityBeijing 100192China Hangzhou Innovation Institute Beihang UniversityHangzhou 310052China Beijing Institute of Aeronautical Materials Aero Engine Corporation of ChinaBeijing 100095China

The wettability of materials used in the production of devices employed in various technological domains have attracted significant ***,it is important to design the surfaces of these materials such that they can provide the required surface free energy and simplify the interfacial ***,various Cu films with a highly controllable surface wettability and a wide range of contact angles ranging from 6°to 152°were fabricated,and the corresponding mechanism was discussed.A wide range of wettability was realized by controlling the surface structure of the Cu *** nanogap structure of the vertical nanowire-array film led to a high surface free ***,the oblique nanowirearray film increased the surface free energy;however,the surface free energy was dependent on the size of the nanowires rather than on the nanogaps owing to the crystallinity of the ***,cluster-nanowire-array films were designed to realize a wettability transition from hydrophilicity to hydrophobicity with a constant surface free *** Cu foam possessed a superhydrophilic surface owing to its high porosity,whereas the cluster-nanoparticle structure possessed a superhydrophobic *** addition,we noted that the structure-induced wettability played an important role in tuning the semiconductor and metal interfacial stress and simplifying the interfacial ***,the outstanding electrical conductivity of the Cu films indicates its promising potential as an *** structure-induced wettability proposed in this study can be applied for a wide range of materials,particularly for films used for advanced applications.

关键词： Wettability Copper Film Micro-nano structure Interface

Tunable luminescence,energy transfer and excellent thermal stability of SrMg2(PO4)2:Ce^3+,Tb^3+ phosphors for LEDs

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Journal of Rare Earths 2021年第1期39卷 19-25,I0001页

作者： Wanxin Mi Jun Zheng Peng Qiao lili cao Siqi Chu Hongping Ma College of Machinery and Energy Engineering Zhejiang University of Science and TechnologyHangzhou 310013China Zhejiang Academy of Special Equipment Science Hangzhou 314415China

A series of novel SrMg2(PO4)2:Ce^3+,Tb^3+(SMP:Ce^3+,Tb^3+)phosphors with tunable emission spectra were produced via high temperature solid phase ***,fluorescence spectrum and fluorescence lifetime for SMP:Ce^3+,Tb^3+were studied in *** the excitation at 308 nm,SMP:Ce^3+,Tb^3+samples can emit high efficiency tunable blue-green light by controlling the proportion of dopant *** the spectral overlap and the regular change of fluorescence lifetime,it is proved that there is a significant energy transfer between Ce^3+and Tb^3+in SMP matrix and the energy transfer mechanism is determined to be an electric dipole-dipole interaction with energy transmission efficiency of 55%.In additional,Commission International de L’Eclairage(CIE)color coordinates and thermal stability were *** above findings suggest that SMP:Ce^3+,Tb^3+can be regarded as the potential bluish green phosphor for LED applications.

关键词： Phosphate Luminous performance Energy transfer Thermal stability Rare earths

Core cooling in pressurized-water reactor during water injection

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Nuclear Science and Techniques 2011年第1期22卷 60-64页

作者： TAO Jun LI Jingxi TONG lili cao Xuewu School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

In this paper,the reactor core cooling and its melt progression terminating is evaluated,and the initiation criterion for reactor cavity flooding during water injection is *** core cooling in pressurized-water reactor of severe accident is simulated with the thermal hydraulic and severe accident code of SCDAP/*** results show that the core melt progression is terminated by water injection,before the core debris has formed at bottom of core,and the initiation of reactor cavity flooding is indicated by the core exit temperature.

关键词：压水反应堆堆芯冷却注水严重事故热工水力堆芯熔化温度显示反应器

Prediction and driving factors of forest fire occurrence in Jilin Province,China

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Journal of Forestry Research 2024年第1期35卷 58-71页

作者： Bo Gao Yanlong Shan Xiangyu Liu Sainan Yin Bo Yu Chenxi Cui lili cao Wildland Fire Prevention and Fighting Innovation Center of Beihua University Forestry College of Beihua University3999 Binjiang East RoadJilin City 132013People’s Republic of China

Forest fires are natural disasters that can occur suddenly and can be very damaging,burning thousands of square *** is better than suppression and prediction models of forest fire occurrence have developed from the logistic regression model,the geographical weighted logistic regression model,the Lasso regression model,the random forest model,and the support vector machine model based on historical forest fire data from 2000 to 2019 in Jilin *** models,along with a distribution map are presented in this paper to provide a theoretical basis for forest fire management in this *** studies show that the prediction accuracies of the two machine learning models are higher than those of the three generalized linear regression *** accuracies of the random forest model,the support vector machine model,geographical weighted logistic regression model,the Lasso regression model,and logistic model were 88.7%,87.7%,86.0%,85.0%and 84.6%,*** is the main factor affecting forest fires,while the impacts of topography factors,human and social-economic factors on fire occurrence were similar.

关键词： Forest fire Occurrence prediction Forest fire driving factors Generalized linear regression models Machine learning models

Effect of long-term low dose of aspirin on severity of disease following onset of acute cerebral infarction

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Neural Regeneration Research 2006年第1期1卷 67-69页

作者： Jun Xu lili cao Xiaomei Deng Enji Han Oepartment of Neurology Qilu Hospital of Shandong UniversityJinan 250012 Shandong Province China

BACKGROUND： Aspirin can decrease the incidence risk of high-risk crowdgroup of cerebral infarction, but there are still controversy if it might decrease the degree of disease in degree of patients with acute cerebral infarction. OBJECTIVE： To observe the effect of lower dose of aspirin during taking for a long time on disease degree of disease following onset of acute cerebral infarction. DESIGN： Grouping according to the admission time and 1：1 paired observation.SETTING ： Department of Neurology, Qilu Hospital of Shandong University.PARTICIPANTS ： The participants in present study were 321 patients with acute cerebral infarction who received treatments in the Department of Neurology, Qilu Hospital of Shandong University from January 1999 to June 2000. There were 190 male and 131 female ,with mean （65±11 ）years of age. Inclusive criteria： ① A focal neurological disturbance occurred suddenly and had lasted for more than 24 hours, patients were admitted within 3 days after onset of disease; ② A computed tomography of the brain was performed and excluded hemorrhage in all patients; ③ The patients were proved internal carotid occlusions by clinical features and image findings; ④ The functions of limbs were normal （before the first stroke） or almost normal （before the second stroke）. Exclusive criteria：①The patients who had have cardiogenic cerebral embolism; ②The patients who had taken warfarin orally and other platelet agglutination drugs. METHODS ：①All the patients were divided into 2 groups according to whether they had taken aspirin before： aspirin-treated group （n=110） and blank control group （n=211）. there were 70 male and 40 female in aspirin-treated group, with average（65±10） years of *** patients had taken 50-100 mg/d aspirin for 6 months to 10 years before onset. There were 120 male and 91 female in blank control group, with average （65±13） years of age. Patients received a clinical scoring within 3 days and similar therapeutic measures （such as

关键词： Effect of long-term low dose of aspirin on severity of disease following onset of acute cerebral infarction

Oral nanoparticles containing naringenin suppress atherosclerotic progression by targeting delivery to plaque macrophages

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Nano Research 2023年第1期16卷 925-937页

作者： Mengran Guo Zhongshan He Zhaohui Jin Lingjing Huang Jingmei Yuan Shugang Qin Xinchun Wang lili cao Xiangrong Song Department of Critical Care Medicine Department of Anesthesiology and Translational Neuroscience CenterDepartment of Clinical PharmacyFrontiers Science Center for Disease-related Molecular NetworkState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan UniversityChengdu 610000China First Affiliated Hospital of the Medical College Shihezi UniversityShihezi 832008China College of Medicine Chengdu UniversityChengdu 610000China

Atherosclerosis is the main cause of ischemic stroke and myocardial infarction *** have shown unique benefits for atherosclerosis treatment by targeting the lesional macrophages of ***,most of the nanocarriers are administered intravenously,which is inconvenient and may cause ***,we developed an oral lipid-polymer based nanoparticles(FA-LNPs)decorated with folic acid,which can not only effectively overcome intestinal mucosal-epithelial barrier by increasing the transmembrane transport through intestinal epithelial and the accumulation in Peyer’s patches but also actively target to the aortic plaque sites and accumulate in lesional ***,naringenin(Nrg),one of the antiinflammation drugs,was designed to be the oral nanomedicine(FA-LNPs/Nrg)for the first time via the encapsulation of ***-LNPs/Nrg presented highly anti-atherosclerotic *** the atherosclerotic ApoE−/−mice were treated by FALNPs/Nrg via oral administration for three months,the aortic lesion area,plaque area,and necrotic core area of the aortic root were significantly ***,the lipid-related blood parameters recovered to normal *** study provides a promising approach to atherosclerosis treatment based on the novel oral targeting delivery system.

关键词： atherosclerosis macrophages Peyer’s patches oral delivery folic acid naringenin

Aeromagnetic Compensation Algorithm Based on Levenberg-Marquard Neural Network

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Journal of Geodesy and Geoinformation Science 2021年第4期4卷 74-83页

作者： Li LIU Qingfeng XU Hui GU Lei ZHOU Zhenfu LIU lili cao Shanghai Aerospace Electronic Technology Institute Shanghai 201109China Shanghai General Satellite Navigation Co. Ltd.Shanghai 200040China

The magnetic compensation of aeromagnetic survey is an important calibration work,which has a great impact on the accuracy of *** an aeromagnetic survey flight,measurement data consists of diurnal variation,aircraft maneuver interference field,and geomagnetic *** this paper,appropriate physical features and the modular feedforward neural network(MFNN)with Levenberg-Marquard(LM)back propagation algorithm are adopted to supervised learn fluctuation of measuring signals and separate the interference magnetic field from the measurement *** algorithm is a kind of least square estimation algorithm of nonlinear *** iteratively calculates the jacobian matrix of error performance and the adjustment value of gradient with the regularization *** algorithm’s computing efficiency is high and fitting error is very *** fitting performance and the compensation accuracy of LM-MFNN algorithm are proved to be much better than those of TOLLES-LAWSON(T-L)model with the linear least square(LS)solution by fitting experiments with five different aeromagnetic surveys’data.

关键词： modular feedforward neural network aeromagnetic compensation LM back propagation algorithm