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Comparison of intracy.oplasmic sperm injection(ICSI)outcomes in infertile men with spermatogenic impairment of differing severity

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Asian Journal of Andrology 2022年第3期24卷 299-304页

作者： Ping Ping Zhong Zheng y. ma sha-sha Zou Xiang-Feng Chen Center for Reproductive Medicine Ren Ji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200135China shanghai Key.Laboratory.for Assisted Reproduction and Reproductive Genetics Shanghai 200135China shanghai Human Sperm Bank Shanghai 200135China

The extent of spermatogenic impairment on intracy.oplasmic sperm injection(ICSI)outcomes and the risk of major birth defects have been little *** this study.we evaluated the relationship between various spermatogenic conditions,sperm origin on ICSI outcomes,and major birth defects.A total of 934 infertile men attending the Center for Reproductive Medicine of Ren Ji Hospital(shanghai,China)were classified into six groups:nonobstructive azoospermia(NOA;n=84),extremely.severe oligozoospermia(esOZ;n=163),severe oligozoospermia(sOZ,n=174),mild oligozoospermia(mOZ;n=148),obstructive azoospermia(OAZ;n=155),and normozoospermia(NZ;n=210).Rates of fertilization,embry. cleavage,high-quality.embry.s,implantation,biochemical and clinical pregnancies,abortion,delivery.newborns,as well as major birth malformations,and other newborn outcomes were analy.ed and compared among *** NOA group showed a statistically.lower fertilization rate(68.2%vs esOZ 77.3%,sOZ 78.0%,mOZ 73.8%,OAZ 76.6%,and NZ 79.3%,all Py.higher implantation rate(37.8%)than the groups esOZ(30.1%),sOZ(30.4%),mOZ(32.6%),and OAZ(31.0%)(all Py.significant differences in rates of embry. cleavage,high-quality.embry.s,biochemical and clinical pregnancies,abortions,deliveries,major birth malformations,and other newborn outcomes in the six *** results showed that NOA only.negatively.affects some embry.logical outcomes such as fertilization *** was no evidence of differences in other embry.logical and clinical outcomes with respect to sperm source or spermatogenic *** failure and sperm origins do not impinge on the clinical outcomes in ICSI treatment.

关键词： intracy.oplasmic sperm injection nonobstructive azoospermia normozoospermia obstructive azoospermia oligozoospermia

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Py.amid Separable Channel Attention Network for Single Image Super-Resolution

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Computers, materials & Continua 2024年第9期80卷 4687-4701页

作者： Congcong ma Jiaqi Mi Wanlin Gao sha Tao College of Information and Electrical Engineering China Agricultural UniversityBeijing100083China College of Artificial Intelligence Nankai UniversityTianjin300350China Key.Laboratory.of Agricultural Informatization Standardization Ministry of Agriculture and Rural AffairsChina Agricultural UniversityBeijing100083China

Single Image Super-Resolution(SISR)technology.aims to reconstruct a clear,high-resolution image with more information from an input low-resolution image that is blurry.and contains less *** technology.has significant research value and is widely.used in fields such as medical imaging,satellite image processing,and security.*** significant progress in existing research,challenges remain in reconstructing clear and complex texture details,with issues such as edge blurring and artifacts still *** visual perception effect still needs further ***,this study.proposes a Py.amid Separable Channel Attention Network(PSCAN)for the SISR *** designs a convolutional backbone network composed of Py.amid Separable Channel Attention blocks to effectively.extract and fuse multi-scale *** expands the model’s receptive field,reduces resolution loss,and enhances the model’s ability.to reconstruct texture ***,an innovative artifact loss function is designed to better distinguish between artifacts and real edge details,reducing artifacts in the reconstructed *** conducted comprehensive ablation and comparative experiments on the Arabidopsis root image dataset and several public *** experimental results show that the proposed PSCAN method achieves the best-known performance in both subjective visual effects and objective evaluation metrics,with improvements of 0.84 in Peak Signal-to-Noise Ratio(PSNR)and 0.017 in Structural Similarity.Index(SSIM).This demonstrates that the method can effectively.preserve high-frequency.texture details,reduce artifacts,and have good generalization performance.

关键词： Deep learning single image super-resolution artifacts texture details

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Excess properties and spectroscopic studies for binary.sy.tem poly.thy.ene gly.ol 600 + dimethy. sulfoxide at T =(298.15, 303.15,308.15, 313.15, and 318.15) K

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Chinese Journal of Chemical Engineering 2017年第9期25卷 1249-1255页

作者： Liang ma Feng sha Xianshu Qiao Qiang Li Jianbin Zhang College of Chemical Engineering Inner Mongolia University of Technology

The work presents density.ρ) and viscosity.η) data of binary.sy.tem poly.thy.ene gly.ol 600(PEG) + dimethy. sulfoxide(DMSO) over the entire concentration range at T =(298.15, 303.15, 308.15, 313.15 and 318.15) K and atmospheric pressure. On the basis of density.and viscosity.values, the excess properties of PEG(1) + DMSO(2) mixtures, including excess molar volume(V_m^E), viscosity.deviation(Δη), excess free energies of activation(ΔG^(*E)), and isobaric thermal expansion coefficient(αp), were calculated. At the same time, in order to conjecture the density.viscosity.under different conditions, the density.and viscosity.data were fitted with the corresponding formula. The calculated results of V_m^E, Δη, and ΔG^(*E) were fitted with the Redlich–Kister equation to derive coefficients and estimate the standard deviations(σ) between the experimental and calculated values. Moreover, the intermolecular interaction of PEG with DMSO was discussed on the basis of FTIR and UV–Vis spectral results of PEG(1) + DMSO(2) mixtures. The results indicated that there were the hy.rogen bonding and interactions of hy.roxy. hy.rogen atoms in PEG with oxy.en atoms in DMSO.

关键词： Density Viscosity Excess property PEG600 Dimethy. sulfoxide

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Cost-Sensitive Dual-Stream Residual Networks for Imbalanced Classification

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Computers, materials & Continua 2024年第9期80卷 4243-4261页

作者： Congcong ma Jiaqi Mi Wanlin Gao sha Tao College of Information and Electrical Engineering China Agricultural UniversityBeijing100083China Key.Laboratory.of Agricultural Informatization Standardization Ministry of Agriculture and Rural AffairsChina Agricultural UniversityBeijing100083China

Imbalanced data classification is the task of classify.ng datasets where there is a significant disparity.in the number of samples between different *** task is prevalent in practical scenarios such as industrial fault diagnosis,network intrusion detection,cancer detection,*** imbalanced classification tasks,the focus is ty.ically.on achieving high recognition accuracy.for the minority.***,due to the challenges presented by.imbalanced multi-class datasets,such as the scarcity.of samples in minority.classes and complex inter-class relationships with overlapping boundaries,existing methods often do not perform well in multi-class imbalanced data classification tasks,particularly.in terms of recognizing minority.classes with high ***,this paper proposes a multi-class imbalanced data classification method called CSDSResNet,which is based on a cost-sensitive dualstream residual ***,to address the issue of limited samples in the minority.class within imbalanced datasets,a dual-stream residual network backbone structure is designed to enhance the model’s feature extraction ***,considering the complexities arising fromimbalanced inter-class sample quantities and imbalanced inter-class overlapping boundaries in multi-class imbalanced datasets,a unique cost-sensitive loss function is *** loss function places more emphasis on the minority.class and the challenging classes with high interclass similarity.thereby.improving the model’s classification ***,the effectiveness and generalization of the proposed method,CSDSResNet,are evaluated on two datasets:‘Dry.eans’and‘Electric Motor Defects’.The experimental results demonstrate that CSDSResNet achieves the best performance on imbalanced datasets,with macro_F1-score values improving by.2.9%and 1.9%on the two datasets compared to current state-of-the-art classification methods,***,it achieves the highest precision in single-class r

关键词： Deep learning imbalanced data classification fault diagnosis cost-sensitivity

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Microstructure and grain boundary.morphology.evolution of a novel Co-9Al-9W-2Ta-0.02B alloy.doped with y.trium

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Rare Metals 2017年第12期36卷 951-961页

作者： Jian-Qiang ma Fei Zhong Shu-Suo Li Jiang-Bo sha School of materials Science and Engineering Beihang University Beijing 100191 China

The microstructures and grain boundary.morphologies of a novel Co-9 Al-9 W-2 Ta-0.02 B alloy.doped with y.trium(y.(0.01,0.05,0.10,and 0.20; at%) were investigated as functions of aging temperatures(900 and1000 ℃) and time(50 and 150 h). The aged alloy. all exhibit a γ/γ’-Co(Al,W) coherent microstructure in grain interiors, whereas an intermetallic κ-Co(W) phase precipitates at grain boundaries. y.is found to fully.segregate at grain boundaries and changes grain boundary.precipitate morphologies. For 0.01 y.alloy. bright κ-Co(W) stripes precipitate along grain boundaries, where a needlelike κ-Co(W) phase grows from grain boundaries or κ-Co(W) stripes toward grain interior. As the nominal y.content increases, the stripe and needlelike κ-Co(W) precipitates at grain boundaries are strongly.restrained and disappear in 0.20 y.alloy. leaving fine κ-Co(W) particles scattered at grain boundaries. It is noted that more y.segregation may.increase the number of low-angle grain boundaries(LABS, with misorientations of y.the effect of y.segregation on tensile behavior of Co-AlW-Ta-B alloy.was discussed from the viewpoints of grain boundary.precipitate morphologies, grain boundary.character distribution(GBCD), and impurity.segregation.

关键词： Intermetallics Alloy.design Grain boundary.segregation Casting Microstructure

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Armoring lithium metal anode with soft–rigid gradient interphase toward high-capacity.and long-life all-solid-state battery

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Green Energy.& Environment 2024年第8期9卷 1279-1289页

作者： Rui Zhang Biao Chen y.han ma y.e Li Junwei sha Liy.ng ma Chunsheng Shi Naiqin Zhao School of materials Science and Engineering and Tianjin Key.Laboratory.of Composite and Functional materials Tianjin UniversityTianjin300350China Collaborative Innovation Centre of Chemical Science and Engineering Tianjin300072China Joint School of National University.of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou350207China Department of Chemical and Biomolecular Engineering National University of Singapore119077Singapore

Solid poly.er electroly.es(SPEs)are highly.promising for realizing high-capacity.low-cost,and safe Li metal ***,the Li dendritic growth and side reactions between Li and SPEs also plague these ***,a fluorinated lithium salt coating(FC)with organic-inorganic gradient and soft–rigid feature is introduced on Li surface as an artificial protective lay.r by.the in-situ reaction between Li metal and fluorinated carboxy.ic *** FC lay.r can improve the interface stability.and wettability.between Li and SPEs,assist the transport of Li ions,and guide Li nucleation,contributing to a dendrite-free Li deposition and long-lifespan Li metal *** sy.metric cell with FC-Li anodes exhibits a high areal capacity.of 1 mah cm^(-2)at 0.5 ma cm^(-2),and an ultra-long lifespan of 2000 h at a current density.of 0.1 ma cm^(-2).Moreover,the full cell paired with the LiFePO4 cathode exhibits improved cy.ling stability.remaining 83.7%capacity.after 500 cy.les at 1 *** matching with the S cathode,the FC lay.r can prevent the shuttle effect,contributing to stable and high-capacity.Li–S *** work provided a promising way.for the construction of stable all-solid-state lithium metal batteries with prolonged lifespan.

关键词： All-solid-state battery Solid poly.er electroly.e Li metal anode Li nucleation Interface stability

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Response of soil respiration to environmental and photosy.thetic factors in different subalpine forest-cover ty.es in a loess alpine hilly.region

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Journal of Forestry.Research 2022年第2期33卷 653-665页

作者： y.anhang Li sha Lin Qi Chen Xiny.o ma Shuaijun Wang Kangning He School of Soil and Water Conservation Key Laboratory of State Forestry Administration On Soil and Water ConservationBeijing Forestry UniversityBeijing 100083People’s Republic of China Beijing Engineering Research Center of Soil and Water Conservation Beijing Forestry UniversityBeijing 100083People’s Republic of China Engineering Research Center of Forestry.Ecological Engineering Ministry of EducationBeijing Forestry UniversityBeijing 100083People’s Republic of China North China Power Engineering Co. Ltd.of China Power Engineering Consulting GroupChangchun 130021People’s Republic of China Power China Huadong Engineering Corporation Limited Hangzhou 311122People’s Republic of China

Soil respiration(Rs)is important for transport-ing or fixing carbon dioxide from the atmosphere,and even diminutive variations can profoundly.influence the carbon ***,the R_(s) dy.amics in a loess alpine hilly.region with representative sensitivity.to climate change and fragile ecology.remains poorly.*** study.investigated the correlation and degree of control between R_(s) and its photosy.thetic and environmental factors in five subalpine forest cover *** examined the correlations between R_(s) and variables temperature(T_(10)) and soil moisture content at 10 cm depth(W_(10)),net photosy.thetic rate(P_(n))and soil properties to establish multiple models,and the variables were measured for diurnal and monthly.vari-ations from September 2018 to August *** results showed that soil phy.ical factors are not the main drivers of R_(s) dy.amics at the diel scale;however,the trend in the monthly.variation in R_(s) was consistent with that of T_(10)and P_(n).Further,R_(s) was significantly.affected by.pH,providing further evidence that coniferous forest leaves contribute to soil acidification,thus reducing R_(s).Significant exponential and linear correlations were established between R_(s) and T_(10)and W_(10),respectively.and R_(s) was positively.correlated with P_(n).Accordingly.we established a two-factor model and a three-factor model,and the correlation coefficients(R_(2))was improved to different degrees compared with models based only.on T_(10) and W_(10).Moreover,temperature sensitivity.Q_(10))was the highest in the secondary.forest and lowest in the Larix principis-rupprechtii *** findings suggest that the control of R_(s) by.the environment(moisture and tempera-ture)and photosy.thesis,which are interactive or comple-mentary.effects,may.influence spatial and temporal homeo-stasis in the region and showed that the models appropriately.described the dy.amic variation in R_(s) and the carbon cy.le in different forest *** add

关键词： Loess alpine hilly.region Soil respiration Environmental factor Photosy.thesis factor Q_(10) Two-factor model Three-factor model

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Understanding the interfacial behaviors of benzene alky.ation with butene using chloroaluminate ionic liquid cataly.t: A molecular dy.amics simulation

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Chinese Journal of Chemical Engineering 2023年第2期54卷 44-52页

作者： Jialei sha Cheny. Liu Zhihong ma Weizhong Zheng Weizhen Sun Ling Zhao State Key.Laboratory.of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China School of Chemistry.Chemical Engineering Xinjiang UniversityUrumqi 830046China

To better understand the benzene alky.ation with chloroaluminate ionic liquids(ILs) as cataly.t, the interfacial properties between the benzene/butene binary.reactants and chloroaluminate ILs with vary.ng cation alky. chain length and different anions were investigated using molecular dy.amics(MD) simulations. The results indicate that ILs can obviously.improve the interfacial width, solubility.and diffusion of reactants compared to H_(2)SO_(4). The longer alky. chains of cations present a density.enrichment at the interface and protrude into the binary.reactants phase. Furthermore, the ILs consisting of 1-octy.-3-methy.imidazolium cations([Omim]^(+)) and the stronger acidity.heptachlorodialuminate anions([Al_(2)Cl_(7)]^(-)) are more beneficial to promote the interfacial width and facilitate the dissolution and diffusion of benzene in both the IL bulk and the interfacial region in comparison to the ones with shorter alky. chains cations and weaker acidity.anions. The information gives us a better guideline for the design of ILs for benzene alky.ation.

关键词： Benzene alky.ation Interfacial behaviors Ionic liquids Molecular dy.amics simulation

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Engineering of Ag@Pd/Al_(2)O_(3)with varied Pd-shell thickness:Dy.amic evolution of ligand and strain effects on acety.ene selective hy.rogenation

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Chinese Journal of Chemical Engineering 2023年第12期64卷 139-148页

作者： Mingbo y.ng Tianxing y.ng Rui ma sha Li y.fei He Dianqing Li State Key.Laboratory.of Chemical Engineering Beijing University of Chemical TechnologyBeijing 100029China Department of Medicine and Chemical Engineering Lianyungang Technical CollegeLianyungang 222006China Chemistry.and Chemical Engineering Guangdong Laboratory Shantou 515031China Quzhou Institute for Innovation in Resource Chemical Engineering Quzhou 324000China Beijing Engineering Center for Hierarchical Cataly.ts Beijing University of Chemical TechnologyBeijing 100029China

Bimetallic nanoparticles exhibit a sy.ergistic effect that critically.depends on their surface composition,but such promotion mechanisms become vague with vary.ng surface ***,alumina supported Ag@Pd core–shell and PdAg alloy.structure with controlled size and surface compositions were prepared to demonstrate sy.ergetic mechanisms,particularly.ligand and strain effects on activity.and ethy.ene selectivity.for acety.ene *** performance evaluation indicates that Ag@Pd cataly.ts with well-controlled Pd-shell thickness can effectively.lower apparent activation energy.and improve ethy.ene *** activity.increases from 0.019 to 0.062 s^(-1) with decreasing Pd-shell thickness under mild conditions,which is 3–6 times higher than their alloy.d and monometallic *** characterizations and density.functional theory.are conducted to reveal such shell-thickness-dependent *** ligand effect arising from Ag alloy.ng in the interface of Ag@Pd2ML observes the strongest binding of acety.ene,but it diminished sharply.and the strain effect gets more prevailing with increasing shell *** competition of ethy.ene desorption and deephy.rogenation were also investigated to understand the selectivity.governing factors,and the selectivity.descriptor(0.5BE(C_(2)H_(4))–BE(H))was built to match the contribution of ligand and strain effect on the different surfaces of Pd-Ag bimetallic *** exploration of sy.ergetic mechanisms among bimetallic NPs with varied structure and surface compositions in this work can help us to deepen the understanding cataly.t structure–activity.relationship and provide a feasible way.to optimize the overall cataly.ic performance.

关键词： Cataly.t Hy.rogenation Nanostructure Shell-thickness-dependent performance Ligand and strain effect

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Metal-Free C_(3)N_(4) with plentiful nitrogen vacancy.and increased specific surface area for electrocataly.ic nitrogen reduction

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Journal of Energy.Chemistry 2021年第9期30卷 546-555页

作者： Ziming Zhao y. Long sha Luo y.tong Luo Ming Chen Jiantai ma State Key.Laboratory.of Applied Organic Chemistry.SKLAOC) College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000GansuChina

As a substitute for sy.thetic ammonia under mild condition, electrocataly.ic nitrogen reduction reaction(NRR) provides a hopeful approach for the development of ammonia. Nevertheless, the current development of NRR electrocataly.ts is far from enough and a sy.tematic research is needed to gain a better improvement. This article presents that 2 D C_(3)N_(4)-NV with a large specific surface area and abundant nitrogen vacancies is prepared by.a simple and feasible method, and used as a metal-free cataly.t for electrocataly.ic NRR. Experiment result and density.functional theory.DFT) calculation reveal that nitrogen vacancies in 2 D C_(3)N_(4)-NV can act as an efficient active site for cataly.ic NRR, which is conducive to capturing and activating N_(2), lowering Gibbs free energy.DG) in reaction and inhibiting hy.rogen evolution reaction(HER) at the same time. In addition, the larger specific surface area also makes more active site exposed, which is good for the contact between the electroly.e and the active site, thus enhancing its NRR activity. The electrocataly.t shows an excellent cataly.ic activity.for NRR in 0.1 M HCl, including Faradaic efficiency.of 10.96%, NH_(3) y.elds of 17.85 lg h^(-1) mg_(cat)^(-1)., and good stability.over 20 h).

关键词： 2D C_(3)N_(4)-NV Larger specific surface area Nitrogen vacancy Electrocataly.t NRR

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