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Effect of endometrial thickness on the risk of ectopic pregnancy for frozen embryo transfer

Reproductive and Developmental Medicine 2024年第2期8卷 75-81页

作者： Li-Juan Huang Qu Zheng Xue-Jiao Wang Zhao-Hui Zhong Li-Juan Fu Xing-yu Lv Li-Hong Geng Xiao-Jun Tang yu-bin ding Qi Wan Department of Obstetrics and Gynecology Women and Children’s Hospital of Chongqing Medical UniversityChongqing 401147China School of Public Health Joint International Research Laboratory of Reproduction and Development of the Ministry of Education of ChinaChongqing 400016China The Reproductive Center Chengdu Xinan Gynecology HospitalChengdu 610011China School of Public Health Research Center for Medical and Social DevelopmentChongqing Medical UniversityChongqing 400016China Department of Pharmacology Academician WorkstationChangsha Medical UniversityChangsha 410119China Department of Obstetrics and Gynecology West China Second HospitalSichuan UniversityChengdu 610041China

Objective:Few studies have explored the suitability of endometrial thickness(EMT)as a predictor of ectopic pregnancy(EP)in frozen embryo transfer(FET)*** study aimed to investigate the association between EMT and EP and explore the cutoff value of EMT to predict ***:This retrospective cohort study included women aged 20-45 years undergoing FET between March 2015 and September *** primary outcomes and measured variables were EP and EMT,*** threshold effect of EMT on EP was calculated based on a constructed smooth curve *** patients were divided into two groups based on the threshold for comparison.A subgroup analysis was conducted to examine whether the relationship between EMT and EP remained consistent across the different ***,a generalized linear model was used to analyze the interactions between the treatment factors and EMT in ***:In total,27,549 FET cycles were included,with 27,086 intrauterine and 463 ectopic *** risk of EP in the EMT≤8.7 mm group was 3.36 times higher than that in the EMT>8.7 mm group(odds ratio[OR]:3.36,95%confidence interval[CI]:2.57-4.05).Subgroup analysis further indicated that a thin EMT was a risk factor for EP,independent of other *** also noted that diminished ovarian reserve,tubal factor infertility,transfer of two embryos,or transfer of cleavage-stage embryos may further enhance the risk of EP in patients with thin ***:Thin endometrium was associated with an increased risk of *** with EMT less than 8.7 mm need close medical observation and management after embryo *** addition,diminished ovarian reserve,tubal factor infertility,transfer of two embryos,or transfer of cleavage-stage embryos may significantly enhance the effect of a thin endometrium on the risk of EP.

关键词： Endometrial thickness Thin endometrium Ectopic pregnancy FET cycle Risk factors

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Large-Scale Preparation of Mechanically High-Performance and Biodegradable PLA/PHBV Melt-Blown Nonwovens with Nanofibers

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Engineering 2024年第8期39卷 244-252页

作者： Gaohui Liu Jie Guan Xianfeng Wang Jianyong yu bin ding Shanghai Frontier Science Research Center of Advanced Textiles College of TextilesDonghua UniversityShanghai 201620China College of Materials Science and Engineering Qingdao UniversityQingdao 266071China

Biodegradable polylactic acid(PLA)melt-blown nonwovens are attractive candidates to replace nondegradable polypropylene melt-blown ***,it is still an extremely challenging task to prepare PLA melt-blown nonwovens with sufficient mechanical properties for practical ***,we report a simple strategy for the large-scale preparation of biodegradable PLA/poly(3-hydroxybutyrate-co-3-hydroxyvalerate)(PHBV)melt-blown nonwovens with high strength and excellent *** this process,a small amount of PHBV is added to PLA to improve the latter’s crystallization rate and *** addition,when the PHBV content increases from 0 to 7.5 wt%,the diameters of the PLA/PHBV melt-blown fibers decrease significantly(with the proportion of nanofibers increasing from 7.7%to 42.9%).The resultant PLA/PHBV(5 wt%PHBV)melt-blown nonwovens exhibit the highest mechanical *** tensile stress,elongation,and toughness of PLA/PHBV(5 wt%PHBV)melt-blown nonwovens reach 2.5 MPa,45%,and 1.0 MJm3,*** importantly,PLA/PHBV melt-blown nonwovens can be completely degraded into carbon dioxide and water after four months in the soil,making them environmentally friendly.A general tensile-failure model of melt-blown nonwovens is proposed in this study,which may shed light on mechanical performance enhancement for nonwovens.

关键词： PLA PHBV Melt-blown Biodegradable Strength Toughness

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Associations of early-life factors and indoor environmental exposure with asthma among children:a case-control study in Chongqing,China

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World Journal of Pediatrics 2022年第3期18卷 186-195页

作者： yun-Tian Deng Xue-Mei Li En-Mei Liu Wen-Kui Xiong Shuo Wang Rui Zhu yu-bin ding Zhao-Hui Zhong The First Clinical College Chongqing Medical UniversityChongqingChina Pediatric Outpatient Chongqing Health Center for Women and ChildrenChongqingChina National Clinical Research Center for Child Health and Disorders Ministry of Education Key Laboratory of Child Development and DisordersChongqing Key Laboratory of PediatricsChongqingChina Department of Respiratory Medicine Children’s Hospital of Chongqing Medical UniversityChongqingChina School of Public Health and Management Chongqing Medical UniversityChongqingChina School of Public Health and Management Research Center for Medicine and Social DevelopmentInnovation Center for Social Risk Governance in HealthChongqing Medical UniversityNo.1Medical School RoadYu zhong DistrictChongqingChina

Background Childhood asthma has substantial effects on children’s *** is important to identify influencing factors in early life in the development of childhood *** aim to evaluate the effects of early-life factors and indoor environmental exposure on childhood asthma in Chongqing,*** We designed a case-control study to enrol children with asthma aged 3 to<14 years old and controls in Chongqing,***“Children’s Early Life and Indoor Environment Survey”was used to collect the early-life factors and indoor environmental exposure of foetuses in utero and of infants during the first 3 years of life.A multivariate logistic regression model was used to evaluate the association between independent variables and childhood asthma and the interaction of early-life factors and environmental *** A total of 160 asthma cases and 247 controls were included in this *** mean ages of the cases and controls were 5.53±1.88 and 5.72±2.34 years,respectively(P=0.192).Early-life factors and indoor environmental exposure were independently associated with childhood *** diseases of the respiratory system in children under 3 years old[adjusted odds ratio(OR)=5.76,95%confidence interval(CI)2.49-13.30],bedroom air conditioner use(adjusted OR=4.61,95%CI 1.45-14.64),and bedroom dampness/mould(adjusted OR=2.98,95%CI 1.54-5.75)ranked as the three most significant exposures associated with the risk of childhood *** factors associated with an increased risk of childhood asthma included second-hand smoke exposure in early life(adjusted OR=1.93,95%CI 1.24-3.00),neonatal pneumonia(adjusted OR=1.90,95%CI 1.05-3.42)and maternal allergic diseases during pregnancy(adjusted OR=2.13,95%CI 1.10-4.10).The interaction effects of child second-hand smoke exposure with other covariates were not found to be statistically *** Early-life factors and indoor environmental exposure are closely related to childhood asthma in Chongqing,C

关键词： Asthma Children Environment Risk/protective factor

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Equivalent linear model for seismic damage evaluation of single-degree-of-freedom systems representing reinforced concrete structures considering cyclic degradation behavior

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Earthquake Engineering and Engineering Vibration 2024年第3期23卷 637-648页

作者： Lulu Yan ding-Hao yu Research Center for Geotechnical and Structural Engineering Technology of Liaoning Province Dalian UniversityDalian116622China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

In this study,a novel equivalent damping ratio model that is suitable for reinforced concrete(RC)structures considering cyclic degradation behavior is developed,and a new equivalent linearization analysis method for implementing the proposed equivalent damping ratio model for use in seismic damage evaluation is *** this end,Ibarra’s peak-oriented model,which incorporates an energy-based degradation rule,is selected for representing hysteretic behavior of RC structure,and the optimized equivalent damping for predicting the maximum displacement response is presented by using the empirical method,in which the effect of cyclic degradation is ***,the relationship between the hysteretic energy dissipation of the inelastic system and the elastic strain energy of the equivalent linear system is established so that the proposed equivalent linear system can be directly integrated with the Park-Ang seismic model to implement seismic damage *** to the simplicity of the equivalent linearization method,the proposed method provides an efficient and reliable way of obtaining comprehensive insight into the seismic performance of RC *** verification demonstrates the validity of the proposed method.

关键词： degrading system equivalent linear system equivalent damping seismic damage RC structures

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Diphylleia Grayi-Inspired Intelligent Temperature-Responsive Transparent Nanofiber Membranes

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Nano-Micro Letters 2024年第4期16卷 67-78页

作者： Cengceng Zhao Gaohui Liu Yanyan Lin Xueqin Li Na Meng Xianfeng Wang Shaoju Fu Jianyong yu bin ding Shanghai Frontier Science Research Center of Advanced Textiles College of TextilesDonghua UniversityShanghai 201620People’s Republic of China

Nanofiber membranes(NFMs) have become attractive candidates for next-generation flexible transparent materials due to their exceptional flexibility and breathability. However, improving the transmittance of NFMs is a great challenge due to the enormous reflection and incredibly poor transmission generated by the nanofiber-air interface. In this research, we report a general strategy for the preparation of flexible temperature-responsive transparent(TRT) membranes,which achieves a rapid transformation of NFMs from opaque to highly transparent under a narrow temperature window. In this process, the phase change material eicosane is coated on the surface of the polyurethane nanofibers by electrospray technology. When the temperature rises to 37 ℃, eicosane rapidly completes the phase transition and establishes the light transmission path between the nanofibers, preventing light loss from reflection at the nanofiber-air interface. The resulting TRT membrane exhibits high transmittance(> 90%), and fast response(5 s). This study achieves the first TRT transition of NFMs, offering a general strategy for building highly transparent nanofiber materials, shaping the future of next-generation intelligent temperature monitoring, anti-counterfeiting measures, and other high-performance devices.

关键词： Biomimetic Transparent Nanofibrous membrane Temperature response Phase change materials

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Advanced nanofabrication for elastic inorganic aerogels

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Nano Research 2024年第10期17卷 8842-8862页

作者： Xiaota Cheng Xinyi Chang Fan Wu Yalong Liao Kai Pan Hao Fong Jianyong yu Yi-Tao Liu bin ding Innovation Center for Textile Science and Technology College of TextilesDonghua UniversityShanghai 201620China Aerospace Institute of Advanced Material and Processing Technology Beijing 100074China College of Materials Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China

Inorganic aerogels with low density,high porosity,large specific surface area,and superior mechanical properties are excellent candidate materials in fields such as thermal management,energy,catalysis,and biomedical applications.A comprehensive overview of existing elastic inorganic aerogels is provided,covering their structural units,preparation methods,mechanical performances,and ***,based on the constituent building blocks and microstructures,a detailed analysis of the mechanical properties and guidelines for elastic design of aerogels is *** with a succinct summary of prospective developmental direction,this review deliberates on the challenges and potential opportunities of elastic inorganic aerogels,with the intent of providing a versatile platform for designing new types of elastic inorganic aerogels for various applications.

关键词： inorganic aerogels compressive stretchable fabrication mechanical performances applications

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Numerical Investigation on Heat Transfer Characteristics of Microencapsulated Phase Change Material Slurry in a Rectangular Minichannel

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Journal of Thermal Science 2024年第2期33卷 564-577页

作者： WANG Zhibin LI Zilong JIA Lisi ding bin CHEN Ying School of Materials and Energy Guangdong University of TechnologyGuangzhou510006China Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter Guangzhou510006China College of New Energy China University of Petroleum(East China)Qingdao266580China

Microencapsulation phase change material slurry(MEPCMS) becomes a potential working fluid for cooling high energy density miniaturized components,thanks to the latent heat absorption of particles in the heat transfer *** this work,the Discrete Phase Model(DPM) based on the Euler-Lagrangian method is used to numerically investigate the convective heat transfer characteristics of MEPCMS flowing through a rectangular minichannel with constant heat *** results show that particles of MEPCMS are mainly subjected to drag force during the *** so,they can migrate from the high-temperature region to the low-temperature region driven by the thermophoretic force,affecting the particle distribution and phase change ***,the Nux of the MEPCMS fluctuates due to particle phase change with varying specific heat ***,the value increases first,then decreases,and eventually increases again until it approaches the fully developed value of the pure base fluid as the particles gradually ***,the heat transfer performance of the MEPCMS is influenced by the combination of fluid inlet temperature fluid inlet velocity(v),and mass concentration(c_(m)) of MEPCM *** result shows that the maximum reduction of the maximum bottom wall temperature difference(ΔT_(w)) is 23.98% at T_(in)=293.15 K,v=0.15 m·s^(-1),c_(m)=10%.

关键词： Microencapsulated Phase Change Material Slurry(MPCMS) Discrete Phase Model(DPM) particle-fluid interaction force minichannel heat sink thermophoresis

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Hybrid Network Model Based on Data Enhancement for Short-term Power Prediction of New PV Plants

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 77-88页

作者： Shangpeng Zhong Xiaoming Wang bin Xu Hongbin Wu Ming ding the Anhui Province Key Laboratory of Renewable Energy Utilization and Energy Saving Hefei University of TechnologyHefei 230009China the State Grid Anhui Electric Power Research Institute Hefei 230061China

This study proposes a hybrid network model based on data enhancement to address the problem of low accuracy in photovoltaic(PV)power prediction that arises due to insuffi cient data samples for new PV ***,a time-series gener ative adversarial network(TimeGAN)is used to learn the distri bution law of the original PV data samples and the temporal correlations between their features,and these are then used to generate new samples to enhance the training ***,a hybrid network model that fuses bi-directional long-short term memory(BiLSTM)network with attention mechanism(AM)in the framework of deep&cross network(DCN)is con structed to effectively extract deep information from the origi nal features while enhancing the impact of important informa tion on the prediction ***,the hyperparameters in the hybrid network model are optimized using the whale optimi zation algorithm(WOA),which prevents the network model from falling into a local optimum and gives the best prediction *** simulation results show that after data enhance ment by TimeGAN,the hybrid prediction model proposed in this paper can effectively improve the accuracy of short-term PV power prediction and has wide applicability.

关键词： New photovoltaic(PV)plant short-term predic tion time-series generative adversarial network(TimeGAN) hy brid network hyperparameter

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Chord length sampling correction analysis for dispersion fuel in Monte Carlo simulation

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Nuclear Science and Techniques 2024年第4期35卷 57-64页

作者： Zhao-yu Liang ding She yu-Tong Wen Lei Shi Institute of Nuclear and New Energy Technology(INET) Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing 100084China

Dispersion fuels,knowned for their excellent safety performance,are widely used in advanced reactors,such as hightemperature gas-cooled *** with deterministic methods,the Monte Carlo method has more advantages in the geometric modeling of stochastic *** explicit modeling method has high computational accuracy and high computational *** chord length sampling(CLS)method can improve computational efficiency by sampling the chord length during neutron transport using the matrix chord length?s probability density *** study shows that the excluded-volume effect in realistic stochastic media can introduce certain deviations into the CLS.A chord length correction approach is proposed to obtain the chord length correction factor by developing the Particle code based on equivalent transmission *** numerical analysis against reference solutions from explicit modeling in the RMC code,it was demonstrated that CLS with the proposed correction method provides good accuracy for addressing the excludedvolume effect in realistic infinite stochastic media.

关键词： Stochastic media Monte Carlo Chord length sampling Excluded-volume effect Chord length correction

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Prescribed time control based on the periodic delayed sliding mode surface without singularities

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Science China(Information Sciences) 2024年第7期67卷 256-270页

作者： bin ZHOU Yi ding Kang-Kang ZHANG Guang-Ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology

In this paper, nonsingular prescribed-time control is studied based on periodic delayed sliding mode surfaces. Different from the existing sliding mode control, where either singularity problems may appear or the convergence time depends on the initial state, the proposed sliding mode control approaches can achieve prescribed-time convergence without singularity. The proposed nonsingular sliding mode control approaches can be applied to both second-order and high-order nonlinear systems with prescribed-time convergence. As applications of the proposed sliding mode control approaches, the control of hypersonic vehicle systems is revisited. Numerical simulations on the nonlinear model of the hypersonic vehicle system show the effectiveness of the proposed methods.

关键词： prescribed-time control smooth periodic delayed feedback sliding mode control high-order nonlinear systems hypersonic vehicle systems

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