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Effects of Mo and Mn on Pitting Behavior of Duplex Stainless Steel

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Journal of Iron and Steel Research International 2016年第12期23卷 1333-1341页

作者： Li-cong AN Jing CAO Lin-cai WU Hong-huan mao Yi-tao YANG School of Materials Science and Engineering Shanghai University

Effects of Mo and Mn elements on pitting corrosion resistance of lean duplex stainless steel in C1- media solution have been studied. Gravimetric tests in 6 mass% FeCl3 at 35 ℃ and potentiodynamic analysis in 3.5 mass% NaCI were carried out. The corrosion potential （Ecoor） and the pitting potential （Epit） are shifted to a more noble po tential because of the presence of Mo around the pits. While the presence of Mn could sharply reduce the value of pitting resistance equivalent number （PREn） and the pits can be formed more easily. The pits are found generating at the phase with a lower PREn. The identical tendencies between the Epit and PREn of weaker phase are the same. A corrosion mechanism has been proposed to determinate pitting corrosion behavior based on microstructural observations.

关键词： duplex stainless steel alloying element pitting corrosion pitting resistance equivalent number corrosion mechanism

Enhanced hepatic metabolic perturbation of polystyrene nanoplastics by UV irradiation-induced hydroxyl radical generation

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Journal of Environmental Sciences 2024年第8期142卷 259-268页

作者： Shiyu He Jingran Wang Lihong Zhou Zhen mao Xiaodan Zhang Jin cai Peili Huang School of Public Health and Beijing Key Laboratory of Environmental Toxicology Capital Medical UniversityBeijing 100069China

The environmental behavior of and risks associated with nanoplastics(NPs)have attracted considerable ***,compared to pristine NPs,environmental factors such as ultraviolet(UV)irradiation that lead to changes in the toxicity of NPs have rarely been *** evaluated the changes in morphology and physicochemical properties of polystyrene(PS)NPs before and after UV irradiation,and compared their hepatotoxicity in *** results showed that UV irradiation caused particle size reduction and increased the carbonyl index(CI)and negative charge on the particle ***-aged PS NPs(aPS NPs)could induce the generation of hydroxyl radicals(·OH),but also further promoted the generation of·OH in the Fenton reaction *** pathological damage was more severe in mice exposed to aPS NPs,accompanied by a large number of vacuoles and hepatocyte balloon-like changes and more marked perturbations in blood glucose and serum lipoprotein,alanine aminotransferase and aspartate aminotransferase *** addition,exposure to PS NPs and aPS NPs,especially aPS NPs,triggered oxidative stress and significantly damaged the antioxidant capacity of mice *** with PS NPs,exposure to aPS NPs increased the number of altered metabolites in hepatic and corresponding metabolic pathways,especially glutathione *** research suggests that UV irradiation can disrupt the redox balance in organisms by promoting the production of·OH,enhancing PS NPs-induced liver damage and metabolic *** study will help us understand the health risks of NPs and to avoid underestimation of the risks of NPs in nature.

关键词： Polystyrene nanoplastics Ultraviolet-aged nanoplastics Metabolic pathway Metabolomics Hydroxyl radical

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美国大学“可免试入学”选才政策的演进逻辑

黑龙江高教研究 2025年第2期43卷 73-80页

作者：袁卫李茂菊东莞市行政学院广东东莞523083 北京师范大学北京100875 东莞理工学院广东东莞523808

美国大学“可免试入学”选才政策打破了传统招生对标准化考试成绩的依赖,对提升高等教育公共服务的可及性产生了重要影响。基于间断-均衡理论视角,可深入剖析政策变迁中政策图景、政策场域、政策垄断等核心要素的动态变化与作用机制。... 详细信息

美国大学“可免试入学”选才政策打破了传统招生对标准化考试成绩的依赖,对提升高等教育公共服务的可及性产生了重要影响。基于间断-均衡理论视角,可深入剖析政策变迁中政策图景、政策场域、政策垄断等核心要素的动态变化与作用机制。美国大学“可免试入学”政策历经标准化考试成绩依赖逐步确立与主导阶段、打破标准化考试成绩桎梏的潮流逆转阶段、以多元评价标准录取决策的理念重塑阶段。从动因解释来看,主要受大学招生决策主体注意力的转移、焦点事件强力冲击、经济社会情境改变的影响。在深入推进新高考综合改革的背景下,我国大学可从深度推进新高考综合评价、保障一流大学办学自主和扩大招生自主权、提高招生过程透明度等三个方面突破。

关键词： “可免试入学”政策美国大学间断-均衡理论

Optimal Energy Efficiency Resource Allocation Strategy for Cognitive Clustering Network under PUEA Attack

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China Communications 2020年第10期17卷 249-263页

作者： Linna Hu Ning Cao Rui Shi Xue cai Minghe mao Zhiyu Chen Computer&Information College Hohai UniversityNanjing 210098China Nanjing University of Science&Technology Zijin College Nanjing 210023China State Grid Information&Telecommunication Branch State Grid Corporation of ChinaBeijing 100761China School of Electronic and Information Engineering Suzhou universitySuzhou 215006China

5G has pushed the use of radio spectrum to a new level,and cognitive clustering network can effectively improve the utilization of radio spectrum,which is a feasible way to solve the growing demand for wireless ***,cognitive clustering network is vulnerable to PUEA attack,which will lead to the degradation of system detection performance,thereby reducing the energy *** at these problems,this paper investigates the optimal energy efficiency resource allocation scheme for cognitive clustering network under PUEA attack.A cooperative user selection algorithm based on selection factor is proposed to effectively resist PUEA user attack and improve detection *** construct the energy efficiency optimization problem under multi-constraint conditions and transform the nonlinear programming problem into parametric programming problem,which is solved by Lagrangian function and Karush-Kuhn-Tucker *** the sub-gradient iterative algorithm based on optimal energy efficiency under PUEA attack is proposed and its complexity is *** results indicate that proposed method is effective when subjected to PUEA attacks,and the impact of different parameters on energy efficiency is analyzed.

关键词： cognitive clustering network energy efficiency resource allocation PUEA cooperative user selection

Effects of Bi-dopant and co-catalysts upon hole surface trapping on La_(2)Ti_(2)O_(7) nanosheet photocatalysts in overall solar water splitting

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Nano Research 2022年第1期15卷 438-445页

作者： Xiaoyan cai Liang mao Mamoru Fujitsuka Tetsuro Majima Sujan Kasani Nianqiang Wu Junying Zhang School of Materials Science and Physics Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and EquipmentChina University of Mining and TechnologyXuzhou 221116China School of Physics Beihang UniversityBeijing 100191China The Institute of Scientific and Industrial Research(SANKEN) Osaka UniversityMihogaoka 8-1IbarakiOsaka 567-0047Japan Department of Mechanical and Aerospace Engineering West Virginia UniversityMorgantownWV 26506-6106USA Department of Chemical Engineering University of Massachusetts AmherstAmherstMA 01003-9303USA

Pristine and Bi-doped lanthanum titanium oxide(La_(2)Ti_(2)O_(7))nanosheets have been synthesized as photocatalysts for overall solar water *** surface hole trap is a critical factor that limits the photocatalytic activity of pristine La_(2)Ti_(2)O_(7)-Deposition of cobalt phosphate(Co-Pi)and platinum(Pt)nanoparticles on La_(2)Ti_(2)O_(7) cannot remove the surface traps although they are essential for enabling the oxygen and hydrogen evolution *** is interesting that doping bismuth(Bi)into La_(2)Ti_(2)O_(7) nanosheets has eliminated the surface traps due to surface enrichment of *** Co-Pi/Bi-La_(2)Ti_(2)O_(7)/Pt nanosheets exhibit increasing photocatalytic activity toward overall water splitting with increasing the Bi-dopant level up to 5 at.%.Further increasing the Bi-dopant level leads to the formation of localized states above the valence band,leading to the lifetime reduction of photogenerated charge-carriers,and jeopardizing the photocatalytic *** work proposes an effective strategy to address the surface trapping and surface catalysis issues in the nanostructured metal oxide photocatalysts.

关键词： photocatalyst water splitting surface trap co-catalyst solar fuel

Environmental drivers of soil microbial activity and diversity along an elevational gradient

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Journal of Mountain Science 2022年第5期19卷 1336-1347页

作者： PENG Si-li GE Zhi-wei LIU Gang-cai mao Ling-feng Co-Innovation Center for Sustainable Forestry in Southern China College of Biology and the EnvironmentNanjing Forestry UniversityNanjing 210037China Key Laboratory of Mountain Surface Processes and Ecological Regulation Institute of Mountain Hazards and EnvironmentChinese Academy of ScienceChengdu 610041China

Microbial functional and structural patterns and drivers along elevational gradients have recently received increasing *** this study,we examined soil bacterial and fungal community diversity,compositions,and microbial activities(i.e.,soil basal respiration and extracellular enzyme activities)across an elevational gradient from 1148 m to 2080 m(consists of six elevations)in the Yuanmou dry-hot valley located in Southwest *** factors,including soil temperature,moisture content,pH,soil organic carbon(SOC),total nitrogen(TN),the C/N ratio,total phosphorus(TP),and aboveground plant biomass were also *** results showed that soil bacterial alpha diversity(Shannon index)was unaffected by elevation,whereas fungal alpha diversity firstly increased significantly from 1148 m to 1539 m but did not increase further at higher *** Shannon index was significantly correlated with SOC,whereas fungal Shannon index was remarkably associated with soil *** activity,beta diversities and community composition varied with elevation,but none of them showed a consistent *** Carlo test revealed that soil moisture followed by temperature,and pH,were the primary drivers of bacterial community *** fungal community composition significantly depended on soil ***,our study suggested bacterial diversity and composition were determined by climatic(moisture and temperature)and edaphic properties(SOC and pH),while fungal diversity and composition were structured mainly by climatic *** findings may contribute to a better understanding of microbial responses along elevational gradients in this semi-arid region.

关键词： Bacteria Fungi Composition and diversity Basal respiration Enzyme activity

Analysis of independent risk factors for acute acquired comitant esotropia

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International Journal of Ophthalmology(English edition) 2023年第11期16卷 1854-1859页

作者： Jie cai Wei-Xia Lai Xia Li Qin Li Ying cai Jin-mao Chen Department of Ophthalmology the First Affiliated Hospital of Guangxi Medical UniversityNanning 530021Guangxi Zhuang Autonomous RegionChina Department of Ophthalmology the First Affiliated Hospital of Guangxi University of Chinese MedicineNanning 530022Guangxi Zhuang Autonomous RegionChina Nanning Aier Eye Hospital Nanning 530001Guangxi Zhuang Autonomous RegionChina

comitant esotropia(AACE).METHODS:A retrospective cohort study was conducted by analyzing 83 patients(case group)with AACE who underwent strabismus correction surgery from January 1,2021 to June 30,*** 73 outpatient volunteers were recruited during the same period as the normal control *** case group’s binocular vision time,near and distance esotropia angle,and near stereo vision function were recorded,and the age,gender,refractive status,and best-corrected visual acuity(BCVA)of both groups were ***,multiple logistic regression analysis was conducted using an eye usage condition questionnaire to determine the independent risk factors for ***:In the case group,61 patients(73.49%)had myopia,with a mean equivalent spherical power(SE)of-3.35±3.31 D(range:+2.75 to-10.62 D)of the right eye and-2.87±3.35 D(range:+2.75 to-11.12 D)of the left *** average duration of diplopia in the case group was 29.83±35.72mo,of which 80 patients(96.39%)were primarily with distance *** near and distance esotropia angle after wearing glasses were 52.36±20.95 prism degree(PD)and 56.71±19.54 PD,respectively,and there was no statistically significant difference between the two(t=1.38,P=0.169).The incidence of improper glasses wearing and unhealthy eye habits in the case group was significantly higher than those in the control group(P<0.05).Close-up work without glasses[β=2.30,odds ratio(OR)=10,95%confidence interval(CI)2.35-42.51,P=0.002]and near work in supine position(β=1.80,OR=6.02,95%CI 3.29-11.02,P<0.001)were independent risk factors for ***:Patients with AACE mainly present with distance diplopia,and there is a high degree of variation in *** work without wearing glasses and in supine position are independent risk factors for AACE.

关键词： acute acquired comitant esotropia strabismus risk factors

Monitoring elevation change of glaciers on Geladandong Mountain using Tan DEM-X SAR interferometry

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Journal of Mountain Science 2017年第7期14卷 859-869页

作者： LIU guang FAN Jing-hui ZHAO Feng mao Ke-biao DOU Chang-yong Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences China Aero Geophysical Survey & Remote Sensing Center for Land and Resources School of Instrumentation Science and Opto-electronics Engineering Beihang University Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences

Glaciers play an important role in the climate system. The elevation change of a glacier is an important parameter in studies of glacier dynamics. Only a few ground-based measurements of high mountain glaciers are available due to their remoteness, high elevation, and complex topography. The acquisition from the German Tan DEM-X(Terra SAR-X add-on for Digital Elevation Measurement) SAR imaging configuration provides a reliable data sources for studying the elevation change of glaciers. In this study, the bistatic Tan DEM-X data that cover the Geladandong Mountain on the Tibetan Plateau were processed with SAR interferometry technique and the elevation changes of the mountain's glaciers during 2000–2014 were obtained. The results indicated that although distinct positive and negative elevation changes were found for different glacier tongues, the mean elevation change was about-0.14±0.26 m a-1. Geoscience Laser Altimeter System(GLAS) data were obtained for comparison and verification. The investigation using GLAS data demonstrated the efficacy of the proposed method in determining glacier elevation change. Thus, the presented approach is appropriate for monitoring glacier elevation change and it constitutes a valuable tool for studies of glacier dynamics.

关键词： Elevation change Glacier Syntheticaperture radar interferometry Tan DEM-X Geladandongmountain Tibetan Plateau

Review:Anticancer effects of Chinese herbal medicine,science or myth?

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2006年第12期7卷 1006-1014页

作者： RUAN Wen-jing LAI mao-de ZHOU Jian-guang Department of Pathology School of MedicineZhejiang Universitv Hangzhou 310006 China Department of Dermatology the Second Affiliated Hospital School of Medieine Zhejiang University. Hangzhou 310009 China

Currently there is considerable interest among oncologists to find anticancer drugs in Chinese herbal medicine (CHM). In the past, clinical data showed that some herbs possessed anticancer properties, but western scientists have doubted the scientific validity of CHM due to the lack of scientific evidence from their perspective. Recently there have been encouraging results, from a western perspective, in the cancer research field regarding the anticancer effects of CHM. Experiments showed that CHM played its anticancer role by inducing apoptosis and differentiation, enhancing the immune system, inhibiting angiogenesis, reversing multidrug resistance (MDR), etc. Clinical trials demonstrated that CHM could improve survival, increase tumor response, improve quality of life, or reduce chemotherapy toxicity, although much remained to be determined regarding the objective effects of CHM in human in the context of clinical trials. Interestingly, both laboratory experiments and clinical trials have demonstrated that when combined with chemotherapy, CHM could raise the efficacy level and lower toxic reactions. These facts raised the feasibility of the combination of herbal medicines and chemotherapy, although much remained to be investigated in this area.

关键词： Chinese herbal medicine Anticancer