检索结果-南通市图书馆

减税降费对小微企业活力的影响研究--以安徽省合肥市为例

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

巢湖学院学报 2021年第4期23卷 31-39页

作者：李光龙金如涛安徽大学经济学院安徽合肥230601

以安徽省小微企业减税降费调查问卷的数据为样本,基于有序logit模型实证分析了税收因素与非税因素对企业活力的影响。研究发现:减税降费政策的实施有助于小微企业活力的提升,特别是税收负担的降低,对激发小微企业活力效果更明显,并且减... 详细信息

以安徽省小微企业减税降费调查问卷的数据为样本,基于有序logit模型实证分析了税收因素与非税因素对企业活力的影响。研究发现:减税降费政策的实施有助于小微企业活力的提升,特别是税收负担的降低,对激发小微企业活力效果更明显,并且减税降费对员工规模小、纳税信用等级良好的企业活力激励效果更为显著。同时,员工素质、盈利能力等非税因素也会直接影响小微企业的活力,并且盈利能力、贸易摩擦还会通过调节减税降费政策来间接影响小微企业的活力。据此,提出要关注具备一定规模的小微企业的减税降费水平;警惕非税因素对政策实施效果的减弱影响;提高减税降费政策的针对性,降低企业所得税税率;提升企业自身的纳税评级,以及时准确享受政策红利等建议。

关键词：减税降费小微企业 logit模型非税因素

Acquired sensorineural hearing loss,oxidative stress,and microRNAs

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第9期20卷 2513-2519页

作者： Desmond A.Nunez ru C.Guo Division of Otolaryngology–Head&Neck Surgery Department of SurgeryFaculty of MedicineThe University of British ColumbiaVancouverBCCanada Division of Otolaryngology–Head&Neck Surgery Gordon&Leslie Diamond Health Care CentreVancouver General HospitalVancouverBCCanada Faculty of Medicine–The University of British Columbia VancouverBCCanada

Hearing loss is the third leading cause of human ***-related hearing loss,one type of acquired sensorineural hearing loss,is largely responsible for this escalating global health ***-induced,ototoxic,and idiopathic sudden sensorineural are other less common types of acquired hearing *** etiology of these conditions is complex and multi-fa ctorial involving an interplay of genetic and environmental *** stress has recently been proposed as a likely linking cause in most types of acquired sensorineural hearing *** non-coding RNA sequences known as microRNAs(miRNAs)have increasingly been shown to play a role in cellular hypoxia and oxidative stress responses including promoting an apoptotic *** hair cell death is a central histopathological finding in sensorineural hearing *** these cells do not regenerate in humans,it underlies the irreversibility of human age-related hearing *** EMBASE,Ovid MEDLINE,Web of Science Core Collection,and *** databases over the period August 1,2018 to July 31,2023 were searched with"hearing loss,""hypoxamiRs,""hypoxia,""microRNAs,""ischemia,"and"oxidative stress"text words for English language primary study publications or registered clinical *** red clinical trials known to the senior author we re also assessed.A total of 222studies were thus *** excluding duplicates,editorials,retra ctions,secondary research studies,and non-English language articles,39 primary studies and clinical trials underwent full-text *** resulted in 11 animal,in vitro,and/or human subject journal articles and 8 registered clinical trial database entries which form the basis of this narrative *** miR-34a and miR-29b levels increase with age in *** miRNAs were demonstrated in human neuroblastoma and murine cochlear cell lines to target Sirtuin 1/peroxisome proliferato r-activated receptor gamma coactivator-1-alpha(SIRT1/P GC-1α),SIRT

关键词： hearing loss hypoxia microRNAs oxidative stress sensorineural

在线全文

学校读者我要写书评

暂无评论

中学教师构建EAP的对策研究

黑龙江教育学院学报 2012年第8期31卷 23-26页

作者：余桦陶锦茹李士明大庆师范学院黑龙江大庆163712 鸡西市第四中学黑龙江鸡西158130

中学教师在工作、家庭、社会的多重因素影响下,普遍感到压力和负担较重,会产生一系列心理问题并引发一系列应激事件。EAP是一种新兴的心理咨询模式和基于心理学的人力资源管理模式,在促进员工的心理健康,提高工作效率,改善团队气氛中可... 详细信息

中学教师在工作、家庭、社会的多重因素影响下,普遍感到压力和负担较重,会产生一系列心理问题并引发一系列应激事件。EAP是一种新兴的心理咨询模式和基于心理学的人力资源管理模式,在促进员工的心理健康,提高工作效率,改善团队气氛中可以起到显著作用。采取多种有效的措施,将EAP引入中学教师管理领域,不仅能缓解教师压力,激发工作热情,改善教师生活质量,同时可以推进中学教师文化建设,改善学校管理水平,保证升学率,为学校带来客观的效益。

关键词： EAP 中学教师心理对策

Removal of phosphorus-rich phase from high-phosphorous iron ore by melt separation at 1573 K in a super-gravity field

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2016年第7期23卷 743-750页

作者： jin-tao Gao Lei Guo Yi-wei Zhong Hong-ru Ren Zhan-cheng Guo State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing

A new approach of removing the phosphorus-rich phase from high-phosphorous iron ore by melt separation at 1573 K in a super-gravity field was investigated. The iron？slag separation by super-gravity resulted in phosphorus being effectively removed from the iron-rich phase and concentrated as a phosphorus-rich phase at a temperature below the melting point of iron. The samples obtained by super-gravity exhibited obvious layered structures. All the iron grains concentrated at the bottom of the sample along the super-gravity direction, whereas the molten slag concentrated in the upper part of the sample along the opposite direction. Meanwhile, fine apatite crystals collided and grew into larger crystals and concentrated at the slag–iron interface. Consequently, in the case of centrifugation with a gravity coefficient of G = 900, the mass fractions of the slag phase and iron-rich phase were similar to their respective theoretical values. The mass fraction of MFe in the iron-rich phase was as high as 97.77wt% and that of P was decreased to 0.092wt%.

关键词： ironmaking super-gravity melt separation dephosphoration

In-situ constructed ru-rich porous framework on NiFe-based ribbon for enhanced oxygen evolution reaction in alkaline solution

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第11期70卷 197-204页

作者： Guoguo Xi Lei Zuo Xuan Li Yu jin Ran Li tao Zhang Key Laboratory of Aerospace Materials and Performance(Ministry of Education) School of Materials Science and EngineeringBeihang UniversityBeijing100191China School of Aerospace Engineering Beijing Institute of TechnologyBeijing100081China Beijing Spacecrafts China Academy of Space TechnologyBeijing100094China Center for Advanced Analysis and Computational Science Zhengzhou UniversityZhengzhou450001China

Exploiting economical and high-efficient electrocatalysts of oxygen evolution reaction(OER)remains urgent in the field of sustainable hydrogen generation by water ***-and Ir-based materials are benchmark electrocatalysts towards the OER,yet the precious metals are expensive and ***,we develop a kind of ru-doped NiFe-based catalyst with three-dimensional nanoporous surface(NP-ru_(x)),which fulfils both performance and cost requirements for the OER *** novel material can directly work as a support-free electrode and exhibits excellent OER performance with an ultralow overpotential of 245 mV at 10 mA cm^(-2) and a small Tafel slope of 15 mV dec^(-1) as well as low charge transfer *** superior performance could be rationalized as follows:(1)Generated ru-rich nanoporous architecture can not only supply a large number of active sites but also facilitate mass transfer at the electrode/electrolyte interface;(2)Multiple metals(hydro)oxides generated on the surface have the synergistic catalytic effect for the OER;(3)The in-situ generation of(hydro)oxides and the firm bonding of nanoporous layer and the substrate allow for easy electron *** features make NP-ruxa promising oxygen-evolving electrode material toward water electrolysis.

关键词： ru Nanoporous High conductivity Electrocatalyst Oxygen evolution reaction

Uniform Convergence of Wavelet Solution to the Sideways Heat Equation

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2010年第10期26卷 1981-1992页

作者： jin ru WANG Department of Applied Mathematics Beijing University of Technology Beijing 100124 P. R. China

We consider the problem uxx（x, t） = ut（x, t）, 0 ≤ x 〈 1, t ≥ 0, where the Cauchy data g（t） is given at x = 1. This is an ill-posed problem in the sense that a small disturbance on the boundary g（t） can produce a big alteration on its solution （if it exists）. We shall define a wavelet solution to obtain the well-posed approximating problem in the scaling space Vj. In the previous papers, the theoretical results concerning the error estimate are L2-norm and the solutions aren＇t stable at x = 0. However, in practice, the solution is usually required to be stable at the boundary. In this paper we shall give uniform convergence on interval x ∈ [0, 1].

关键词： Sideways heat equation multi-resolution analysis Meyer wavelet solution

Phase order in one-dimensional piecewise linear discontinuous map

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第10期27卷 240-244页

作者： ru-Hai Du Sheng-Jun Wang tao jin Shi-Xian Qu Institute of Theoretical ＆ Computational Physics Shaanxi Normal UniversityXi＇an 710119China School of Physics and Information Technology Shaanxi Normal UniversityXi＇an 710119China

The phase order in a one-dimensional（1 D） piecewise linear discontinuous map is investigated. The striking feature is that the phase order may be ordered or disordered in multi-band chaotic regimes, in contrast to the ordered phase in continuous systems. We carried out an analysis to illuminate the underlying mechanism for the emergence of the disordered phase in multi-band chaotic regimes, and proved that the phase order is sensitive to the density distribution of the trajectories of the attractors. The scaling behavior of the net direction phase at a transition point is observed. The analytical proof of this scaling relation is obtained. Both the numerical and analytical results show that the exponent is 1, which is controlled by the feature of the map independent on whether the system is continuous or discontinuous. It extends the universality of the scaling behavior to systems with discontinuity. The result in this work is important to understanding the property of chaotic motion in discontinuous systems.

关键词： chaos piecewise discontinuous map direction phase

Evolution of microstructure,mechanical and magnetic properties of electrodeposited 50% Ni-Fe alloy foil after thermal treatment

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2017年第8期24卷 844-851页

作者： Hong-ru Ren jin-tao Gao Zhe Wang Chong Li Fu-qiang Wang Zhan-cheng Guo State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

In order to expand the application of the electrodeposited Ni-Fe alloy foil,their mechanical and magnetic properties were studied after heat *** development of grain growth during annealing was in-situ online investigated using a heating stage microscope,and the texture was analyzed via X-ray diffraction（XRD）and electron back-scattered diffraction（EBSD）.The results indicated that abnormal grain growth usually occurred during annealing at 1000-1050°***{111}oriented grains preferentially grew as the annealing temperature and holding time *** plasticities of the electrodeposited Ni-Fe alloy foils after heat treatment were better than those of the original *** excellent ductility was obtained without a loss in magnetic properties after annealing at 1100°C for 6h.

关键词： Electrodeposited Ni-Fe alloy foil Mechanical property Magnetic property Annealing

First-principles study of co-adsorption behavior of O_(2)and CO_(2)molecules onδ-Pu(100)surface

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第2期30卷 431-441页

作者： Chun-Bao Qi tao Wang ru-Song Li jin-tao Wang Ming-Ao Qin Si-Hao tao Xi'an Research Institute of High Technology Xi'an 710025China Xi'an Jiaotong University Xi'an 710049China

First principles calculation is performed to study the co-adsorption behaviors of O_(2)and CO_(2)onδ-Pu(100)surface by using a slab model within the framework of density functional theory(DFT).The results demonstrate that the most favorable co-adsorption configurations are T_(v)-C_(4)O_(7)and T_(p1)-C_(2)O_(8),with adsorption energy of-17.296 e V and-23.131 e V for CO_(2)-based and O_(2)-based system,*** C and O atoms mainly interact with the Pu surface ***,the chemical bonding between C/O and Pu atom is mainly of ionic state,and the reaction mechanism is that C 2 s,C 2 p,O 2s,and O 2p orbitals overlap and hybridize with Pu 6 p,Pu 6 d,and Pu 5 f orbital,resulting in the occurrence of new band *** adsorption and dissociation of CO_(2)molecule are obviously promoted by preferentially occupying adsorbed O atoms,therefore,a potential CO_(2)protection mechanism for plutonium-based materials is that in CO_(2)molecule there occurs complete dissociation of CO_(2)→C+O+O,then the dissociated C atom combines with O atom from O_(2)dissociation and produces CO,which will inhibit the O_(2)from further oxidizing Pu surface,and slow down the corrosion rate of plutoniumbased materials.

关键词： adsorption energy density functional theory electron density reaction mechanism