检索结果-南通市图书馆

Efficient and robust CNN-LSTM prediction of flame temperature aided light field online tomography

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第1期67卷 271-284页

作者： niu ZhiTian QI Hong SUN AnTai REN YaTao HE Mingjian GAO BaoHai School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China Key Laboratory of Aerospace Thermophysics Ministry of Industry and Information TechnologyHarbin 150001China

Light field tomography,an optical combustion diagnostic technology,has recently attracted extensive attention due to its easy implementation and ***,the conventional iterative methods are high data throughput,low efficiency and time-consuming,and the existing machine learning models use the radiation spectrum information of the flame to realize the parameter field measurement at the current *** is still an offline measurement and cannot realize the online prediction of the instantaneous structure of the actual turbulent combustion *** this work,a novel online prediction model of flame temperature instantaneous structure based on deep convolutional neural network and long short-term memory(CNN-LSTM)is *** method uses the characteristics of local perception,shared weight,and pooling of CNN to extract the threedimensional(3D)features of flame temperature and outgoing radiation ***,the LSTM is used to comprehensively utilize the ten historical time series information of high dynamic combustion flame to accurately predict 3D temperature at three future moments.A chaotic time-series dataset based on the flame radiation forward model is built to train and validate the performance of the proposed CNN-LSTM *** is proven that the CNN-LSTM prediction model can successfully learn the evolution pattern of combustion flame and make accurate predictions.

关键词： temperature prediction convolutional neural network long short-term memory light field imaging online tomography

Assessing the treatment effect of cranberry type A proanthocyanidins on vulvovaginal candidiasis:a randomised controlled clinical interventional study

在线全文

学校读者我要写书评

暂无评论

Gynecology and Obstetrics Clinical Medicine 2024年第2期4卷 79-87页

作者： Dongmei Wei Yaoming chen Yueyue chen Tao Cui Xiaoyu niu Department of Gynecology and Obstetrics West China Second HospitalSichuan UniversityChengduChina Key Laboratory of Birth Defects and Related Diseases of Womenand Children(Sichuan University) Ministry of EducationChengduChina chengdu Organic Chemistry Co. LTDChengduChina

Objective This study aimed to evaluate the efficacy and safety of cranberry extracts:A-type proanthocyanidins(A-PACs)in the treatment and prevention of vulvovaginal candidiasis(WC).Method An open,randomised,parallel-design study was conducted.A cohort of 300 eligible patients with WC was recruited from the *** participants were randomly divided into three groups according to a computergenerated randomisation *** in group 1 were treated with standard antifungal therapy(oral single-dose fluconazole 150mg and vaginal miconazole suppository 400 mg at bedtime for 3 days);patients in group 2 received oral A-PACs16mLtwo times perdayfor6days basedon the treatment regimen of group 1;patients in group 3 were given oral A-PACs 16 mL two times per day for 6 days and vaginal miconazole suppository 400mg at bedtime for 3 *** who were clinically cured at the seventh day of follow-up in group 2 received maintenance therapy by oral A-PACs for 12 *** At the seventh day of follow-up,the vaginal mycological results of all patients in group 2 who initially tested positive for pseudohyphae exhibited negative *** negative conversion rates of fungal spores and blastospores in group 2 were superior to those in both group 1 and group *** symptoms of patients in group 2 ameliorated conspicuously compared with those in group 1(p<0.05).The clinical cure rate of VC in both group 2 and group 3 was not inferior to group *** regression analysis showed maintenance therapy was not significantly associated with short-term recurrence(HR 0.44(0.11,1.67);p=0.23)but could significantly diminish the risk of long-term recurrence(HR 0.57(0.33,0.99);p<0.05).Conclusion This study revealed that A-PACs in cranberry juice combined with azole antibiotics can be used as a novel therapeutic option for the treatment and prevention of long-termrecurrenceof *** registration number ChiCTR2300076392.

关键词： vaginal prevention clinical

Secular trends of asthma mortality in China and the United States from 1990 to 2019

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 Medical Journal 2024年第3期137卷 273-282页

作者： Xiaochen Li Mingzhou Guo Yang niu Min Xie Xiansheng Liu Department of Pulmonary and Critical Care Medicine Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430030China NHC Key Laboratory of Respiratory Diseases WuhanHubei 430030China

Background:Asthma imposes a large healthcare burden in China and the United States(US).However,the trends of asthma mortality and the relative risk factors have not been comparatively analyzed between the *** aim of this study was to compare the mortality and risk factors between China and the ***:The deaths,and mortality rates of asthma in China and the US during 1990–2019 were obtained from the Global Burden of Disease Study *** age–period–cohort model was used to estimate these mortality rates based on a log-linear scale with additive age,period,and cohort *** population attributable fractions of risk factors for asthma were ***:In 1990–2019,the asthma mortality rate was higher in China than in the *** crude and age-standardized asthma mortality rates trended downward in both China and the US from 1990 to *** decline in mortality was more obvious in *** gap between the two countries was narrowing.A sex difference in asthma mortality was observed with higher mortality in males in China and females in the *** age effects showed that mortality increased with age in adults older than 20 years,particularly in the *** trends were generally observed in the period and cohort rate ratios in both countries,with China experiencing a more obvious *** and high body mass index(BMI)were the leading risk factors for asthma mortality in China and the US,*** attributable to occupational asthmagens and smoking decreased the most in China and the US,***:In 1990–2019,the asthma mortality rate was higher in China than in the US;however,the mortality gap has *** increased with age in *** improvements in asthma death risk with period and birth cohort were more obvious in China than in the ***,high BMI,and aging are major health problems associated with asthma *** role of occupational asthmagens in asthma mortality under

关键词： Asthma Mortality Global disease burden China the United States Age–period–cohort model

Melittin enhanced intracellular trehalose with synergistic membrane stabilization of macromolecular protectants for cell cryopreservation

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第4期67卷 1160-1169页

作者： niu Qingjing GAO ShuHui ZHU KongYing REN LiXia YUAN XiaoYan School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300350China Analysis and Measurement Center Tianjin UniversityTianjin 300072China

Cryopreservation plays an essential role in biobanking and cell therapy,but the physiological toxicity of traditional cryoprotectants such as glycerol and dimethyl sulfoxide(DMSO)has raised safety issues for biomedical ***,a nonreducing disaccharide that accumulates in desiccation-or cold-tolerant organisms,has been considered as a biocompatible ***,a naturally occurring membrane-active cationic peptide,melittin,was utilized to facilitate membraneimpermeable trehalose entry into cells for effective cell ***(ethylene glycol)and poly(vinyl pyrrolidone)were applied as macromolecular protectants to improve the stabilization of cell *** the optimal protocol,the postthaw recovery of human red blood cells in freezing bags at a hematocrit of~50%could achieve 82.9%with favorable cell morphologies and physiological ***,the cryosurvival of L929 fibroblasts reached 84.3%compared to the conventional method using 10%(v/v)*** short,this work by using trehalose and melittin provides a biocompatible solvent-free approach for long-term cryostorage of cells.

关键词： melittin intracellular trehalose membrane stabilization macromolecular protectants cell cryopreservation

同方期刊数据库

Diatomic Fe-Co catalysts synergistically catalyze oxygen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第5期17卷 3794-3800页

作者： Tianmi Tang jingyi Han Zhenlu Wang Xiaodi niu jingqi Guan Institute of Physical Chemistry College of ChemistryJilin UniversityChangchun 130021China College of Food Science and Engineering Jilin UniversityChangchun 130062China

The design of diatomic catalysts with uniformly dispersed metal atoms is expected to improve catalytic performance,which is conducive to the intensive comprehending of the synergistic mechanism between dual-metal sites for the oxygen evolution reaction(OER)at the atomic ***,we design a strategy to immobilize bimetallic Fe-Co atoms onto nitrogen-doped graphene to obtain a diatomic catalyst(DA-FC-NG)with FeN_(3)-CoN_(3) *** DA-FC-NG shows excellent OER activity with a low overpotential(η_(10)=268 mV),which is superior to commercial iridium dioxide *** calculations uncover that the excellent activity of DA-FC-NG is due to the interaction between Fe and Co diatoms,which causes charge rearrangement and induces the adsorption of intermediates on the Fe-O-Co bridge structure,thus improving the catalytic OER *** work is of great significance for the design of highly active diatomic catalysts to replace noble metal catalysts for energy-related applications.

关键词： oxygen evolution reaction diatomic catalyst FeN_(3)-CoN_(3) X-ray absorption spectroscopy(XAS)spectrum theoretical calculation

Charge-asymmetry Fe_(1)Cu single-atom alloy catalyst for efficient oxygen reduction reaction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第6期17卷 4702-4710页

作者： Xudong niu jian Wei Dongyao Xu jiajing Pei Rui Sui School of Chemical&Environmental Engineering China University of Mining and TechnologyBeijing 100083China Institute of Water Ecology and Environment Chinese Research Academy of Environmental SciencesBeijing 100083China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Engineering Research Center of Advanced Rare Earth Materials Department of ChemistryTsinghua UniversityBeijing 100084China

The development of high-efficient and low-cost oxygen reduction reaction(ORR)electrocatalysts is crucial for the practical applications of metal-air *** promising way is to develop Fe single-atom ***,the single active center and inherent electronic structure of Fe single-atom catalysts lead to the undesirable adsorption of multiple ORR ***,a charge-asymmetry single-atom alloy(SAA)catalyst with Fe-Cu dual sites supported on nitrogen-doped carbon nanosheet(Fe_(1)Cu SAA/NC)was *** characterizations manifest the existence of electron interaction between Fe and Cu in Fe_(1)Cu SAA/NC,which facilitates the adsorption of ORR intermediate for fast ***,the charge-asymmetry Fe_(1)Cu SAA/NC exhibits much faster ORR kinetics with a half-wave potential of 0.917 V *** hydrogen electrode(RHE),outperforming its counterparts in the ***,Fe_(1)Cu SAA/NC still maintains a high half-wave potential with only a drop of 5 mV after 5000 cycles,indicating excellent *** work provides a new strategy to design highly active and non-noble metal ORR electrocatalysts,which hold great potential for various catalytic applications.

关键词： Fe_(1)Cu single-atom alloy(SAA) electrocatalysis oxygen reduction reaction charge-asymmetry

Engineering disease-resistant plants with alternative translation efficiency by switching uORF types through CRISPR

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2024年第8期67卷 1715-1726页

作者： jingjing Tian Zhijuan Tang Ruixia niu Yulu Zhou Dan Yang Dan chen Ming Luo Rui Mou Meng Yuan Guoyong Xu National Key Laboratory of Crop Genetic Improvement National Centre of Plant Gene Research(Wuhan)Huazhong Agricultural UniversityWuhan 430070China State Key Laboratory of Hybrid Rice Institute for Advanced Studies(IAS)Wuhan UniversityWuhan 430072China Hubei Hongshan Laboratory Wuhan 430070China

Engineering disease-resistant plants can be a powerful solution to the issue of food ***,it requires addressing two fundamental questions:what genes to express and how to control their *** find a solution,we screen CRISPR-edited upstream open reading frame(uORF)variants in rice,aiming to optimize translational control of disease-related *** switching uORF types of the 5′-leader from Arabidopsis TBF1,we modulate the ribosome accessibility to the downstream firefly *** assume that by switching uORF types using CRISPR,we could generate uORF variants with alternative translation efficiency(CRISPR-aTrE-uORF).These variants,capable of boosting translation for resistance-associated genes and dampening it for susceptible ones,can help pinpoint previously unidentified genes with optimal expression *** test the assumption,we screened edited uORF variants and found that enhanced translational suppression of the plastic glutamine synthetase 2 can provide broad-spectrum disease resistance in rice with minimal fitness *** strategy,which involves modifying uORFs from none to some,or from some to none or different ones,demonstrates how translational agriculture can speed up the development of disease-resistant *** is vital for tackling the food security challenges we face due to growing populations and changing climates.

关键词： disease-resistant plants broad-spectrum disease resistance uORF uORF types uORF variants CRISPR

同方期刊数据库

A survey on the network models applied in the industrial network optimization

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第2期67卷 85-103页

作者： Chao DONG Xiaoxiong XIONG Qiulin XUE Zhengzhen ZHANG Kai niu Ping ZHANG Key Laboratory of Universal Wireless Communications Ministry of EducationBeijing University of Posts and Telecommunications Smart City College Beijing Union University

Network architecture design is critical for optimizing industrial networks. Network architectures can be classified into small-scale networks and large-scale networks based on scale. Graph theory is an efficient mathematical tool for network topology modeling. For small-scale networks, their structure often has regular topology. For large-scale ones, the current body of work mainly focuses on random characteristics of network nodes and edges. Recently, widely used models include random networks, small-world networks,and scale-free networks. In this study, starting from the scale of the network, network modeling methods based on graph theory as well as their industrial applications, are summarized and analyzed. Moreover, a novel network performance metric, called system entropy, is proposed. From the perspective of mathematical properties, an analysis of its non-negativity and concavity is performed. The advantage of system entropy is that it can cover the existing regular networks, random networks, small-world networks, and scale-free networks, and has strong generality. The simulation results reveal that this proposed metric can achieve the comparison of various industrial networks under different models.

关键词： industrial network small-scale network large-scale network graph theory system entropy

Mitigating the Reconstruction of Metal Sulfides for Ultrastable Oxygen Evolution at High Current Density

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第1期6卷 137-148页

作者： Shuai niu Tang Tang Yuanju Qu Yuyun chen Hao Luo Hui Pan Wen-jie jiang jianan Zhang jin-Song Hu Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Nanostructure and NanotechnologyInstitute of ChemistryChinese Academy of SciencesBeijing 100190 Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacao SAR 999078 Department of Chemical Engineering University of MelbourneParkvilleVictoria 3010 College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001 School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049 Dalian National Laboratory for Clean Energy Dalian 116023

Metal sulfides are emerging highly active electrocatalysts for the oxygen evolution reaction(OER),but still suffer from the instability caused by their inevitable reconstruction,especially at industrial-level current ***,it is discovered that Fe-incorporated Ni3S2 nanowires can deliver extraordinary durability with an ultralow potential degradation rate of 0.006 mV/h in alkaline electrolytes made with fresh water and seawater at a benchmark of 500 mA cm^(-2) while meeting the industrial activity requirement for overpotential less than 300 mV(290 mV).Systematic experiments and theoretical simulations suggest that after forming the S-doped NiFeOOH shell to boost intrinsic activity,Fe incorporation effectivelymitigates the reconstruction of the Ni_(3)S_(2) nanowire core by restraining Ni oxidation and S dissolution,justifying the *** work highlights the significance of circumventing reconstruction and provides a strategy to explore practical chalcogenides-based OER electrocatalysts.

关键词： oxygen evolution reaction sulfur-doped NiFeOOH NiFe sulfides nanowire ultrastable high current density