Application of the Zhe Yin’s Gene Inherits Law

Several results are provided using gene inherits law in another article [1], making use of the theory of algebra in mathematics, according to which we derive, which will give some reference value to genetics.

Hermite Finite Element Method for Vibration Problem of Euler-Bernoulli Beam on Viscoelastic Pasternak Foundation

Viscoelastic foundation plays a very important role in civil engineering. It can effectively disperse the structural load into the foundation soil and avoid the damage caused by the concentrated load. The model of Euler-Bernoulli beam on viscoelastic Pasternak foundation can be used to analyze the deformation and response of buildings under complex geological conditions. In this paper, we use Hermite finite element method to get the numerical approximation scheme for the vibration equation of viscoelastic Pasternak foundation beam. Convergence and error estimation are rigourously established. We prove that the fully discrete scheme has convergence order O(τ2+h4), where τis time step size and his space step size. Finally, we give four numerical examples to verify the validity of theoretical analysis.

Temporal and Spatial Distribution of SARS-CoV-2 Aerosols in a Large-Scale Fangcang Shelter Hospital in Shanghai,China

The coronavirus disease 2019(COVID-19)pandemic caused by frequently mutating severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has had a worldwide impact.However,detailed data on the potential aerosol transmission of SARS-CoV-2 in real-world and controlled laboratory settings remain sparse.During the COVID-19 pandemic in Shanghai,China in 2022,samples were collected in a Fangcang shelter hospital,a large-scale temporary hospital rapidly built by converting the existing National Exhibition and Convention Center(Shanghai)into a health care facility.Aerosol samples at different sites and intervals around patients and in public areas,surface samples,and pharyngeal swab samples from corresponding patients were included.Samples were tested for SARS-CoV-2 using real-time quantitative polymerase chain reaction(RT-qPCR)assays,followed by sequencing if the cycle threshold(Ct)value was<30.The positivity rate for SARS-CoV-2 in aerosol samples was high in contaminated zones(37.5%,104/277),especially around the bed(41.2%,68/165)and near ventilation inlets(45.2%,14/31).The prevalence of SARS-CoV-2 around the bed,public areas,and air inlets of exhaust vents fluctuated and was closely related to the positivity rate among patients at corresponding sampling sites.Some surface samples of different personal protective equipment from medical staff had high positivity rates.Sixty sequences of joined ORF1ab and spike genes obtained from sixty samples represented two main clusters of Omicron SARS-CoV-2.There was consistency in virus sequences from the same patient and their environment,and the detected virus sequences matched those of virus strains in circulation during the collection periods,which indicated a high likelihood of cross-contamination in the Fangcang shelter hospital.In summary,the results provide a quantitative and real landscape of the aerosol transmission of SARS-CoV-2 and a patient-centered view of contamination in large and enclosed spaces and offer a useful guide for taking targeted measures to avoid nosocomial infections during the management of SARS-CoV-2 or other respiratory virus diseases in a Fangcang shelter hospital.

From kesterite 2D nanosheets to wurtzite 1D nanorods:controllable synthesis of Cu-Zn-Sn-S and their application in electrocatalytic hydrogen evolution

As typical quarternary copper-based chalcogenides,Cu–Zn–Sn–S nanocrystals(CZTS NCs)have emerged as a newfashioned electrocatalyst in hydrogen evolution reactions(HERs).Oleylamine(OM),a reducing surfactant and solvent,plays a significant role in the assisting synthesis of CZTS NCs due to the ligand effect.Herein,we adopted a facile one-pot colloidal method for achieving the structure evolution of CZTS NCs from 2D nanosheets to 1D nanorods assisted through the continuous addition of OM.During the process,the mechanism of OM-induced morphology evolution was further discussed.When merely adding pure 1-dodecanethiol(DDT)as the solvent,the CZTS nanosheets were obtained.As OM was gradually added to the reaction,the CZTS NCs began to grow along the sides of the nanosheets and gradually shrink at the top,followed by the formation of stable nanorods.In acidic electrolytic conditions,the CZTS NCs with 1.0 OM addition display the optimal HER activity with a low overpotential of 561 m V at 10 m A/cm^(2) and a small Tafel slope of 157.6 m V/dec compared with other CZTS samples.The enhancement of HER activity could be attributed to the contribution of the synergistic effect of the diverse crystal facets to the reaction.

Analysis of the Relation between Sun Motion Law and the Change of Earth’s Environment

We deduce and obtain the law of the motion of the sun by analyzing the law of motion between the moon, the earth, the sun, and the Polaris. Then we obtain the root of the change of earth’s environment from the law. Meanwhile we analyze the form of the present state of the universe movement and the conditions of energy homeostasis. It may provide reference value for related research.

Implicit finite difference method for fractional percolation equation with Dirichlet and fractional boundary conditions

An implicit finite difference method is developed for a one-dimensional frac- tional percolation equation （FPE） with the Dirichlet and fractional boundary conditions. The stability and convergence are discussed for two special cases, i.e., a continued seep- age flow with a monotone percolation coefficient and a seepage flow with the fractional Neumann boundary condition. The accuracy and efficiency of the method are checked with two numerical examples.

Tunable crystal structure of Cu-Zn-Sn-S nanocrystals for improving photocatalytic hydrogen evolution enabled by copper element regulation

Hydrogen energy is a powerful and efficient energy resource,which can be produced by photocatalytic water split-ting.Among the photocatalysis,multinary copper-based chalcogenide semiconductor nanocrystals exhibit great potential due to their tunable crystal structures,adjustable optical band gap,eco-friendly,and abundant resources.In this paper,Cu-Zn-Sn-S(CZTS)nanocrystals with different Cu content have been synthesized by using the one-pot method.By regulating the surface ligands,the reaction temperature,and the Cu content,kesterite and hexagonal wurtzite CZTS nanocrystals were obtained.The critical factors for the controllable transition between two phases were discussed.Subsequently,a series of quatern-ary CZTS nanocrystals with different Cu content were used for photocatalytic hydrogen evolution.And their band gap,energy level structure,and charge transfer ability were compared comprehensively.As a result,the pure hexagonal wurtzite CZTS nano-crystals have exhibited an improved photocatalytic hydrogen evolution activity.

Numerical Simulation of Groundwater Pollution Problems Based on Convection Diffusion Equation

The analytical solution of the convection diffusion equation is considered by two-dimensional Fourier transform and the inverse Fourier transform. To get the numerical solution, the Crank-Nicolson finite difference method is constructed, which is second-order accurate in time and space. Numerical simulation shows excellent agreement with the analytical solution. The dynamic visualization of the simulating results is realized on ArcGIS platform. This work provides a quick and intuitive decision-making basis for water resources protection, especially in dealing with water pollution emergencies.

Hermite Finite Element Method for a Class of Viscoelastic Beam Vibration Problem

Beam equation can describe the deformation of beams and reflect various bending problems and it has been widely used in large engineering projects, bridge construction, aerospace and other fields. It has important engineering practice value and scientific significance for the design of numerical schemes. In this paper, a scheme for vibration equation of viscoelastic beam is developed by using the Hermite finite element. Based on an elliptic projection, the errors of semi-discrete scheme and fully discrete scheme are analyzed respectively, and the optimal L2-norm error estimates are obtained. Finally, a numerical example is given to verify the theoretical predictions and the validity of the scheme.

Research on Reliability of Knowledge-Updating in A Kind of Network Knowledge System

The definition of reliability of knowledge-updating in network knowledge resource management system (NKRM system for brief) has been given in this paper, which has important reference value to the evaluation of NKRM system. Besides, two kinds of models in NKRM system have been introduced. And one of the most common methods to improve reliability is the redundant technique. However, reliability and efficiency are inconsistent each other. By treating each knowledge as one part of the system, this paper proposes method of joint reserve of knowledge that may resolve this problem.

The Co-planarity and Symmetry Principle of Earthquake Occurrence

Under the assumption that the earth movement tendency is a sphere, the author does research about the earthquakes occurrence between 2001 and 2010 which over 6 scales of magnitude on occurred time (UTC), magnitude, longitude, latitude and other data, then give out the causal relationship of earthquakes and the co-planarity and symmetry theory of earthquake occurrence. Also, the author does empirical analysis in the paper.

Mixed Finite Volume Element Method for Vibration Equations of Beam with Structural Damping

In this paper, for the initial and boundary value problem of beams with structural damping, by introducing intermediate variables, the original fourth-order problem is transformed into second-order partial differential equations, and the mixed finite volume element scheme is constructed, and the existence, uniqueness and convergence of the scheme are analyzed. Numerical examples are provided to confirm the theoretical results. In the end, we test the value of δ to observe its influence on the model.

Optical modification of nonlinear crystals for quasi-parametric chirped-pulse amplification

Quasi-parametric chirped-pulse amplification(QPCPA),which features a theoretical peak power much higher than those obtained with Ti:sapphire laser or optical parametric chirped-pulse amplification,is promising for future ultra-intense lasers.The doped rare-earth ion used for idler dissipation is critical for effective QPCPA,but is usually not compatible with traditional crystals.Thus far,only one dissipative crystal of Sm^(3+)-doped yttrium calcium oxyborate has been grown and applied.Here we introduce optical means to modify traditional crystals for QPCPA applications.We theoretically demonstrate two dissipation schemes by idler frequency doubling and sum-frequency generation with an additional laser.In contrast to absorption dissipation,the proposed nonlinear dissipations ensure not only high signal efficiency but also high small-signal gain.The demonstrated ability to optically modify crystals will facilitate the wide application of QPCPA.

Response of erosion reduction effect of typical soil and water conservation measures in cropland to rainfall and slope gradient changes and their applicable range in the Chinese Mollisols Region,Northeast China

Mollisols are rich in organic matter,which makes them suitable for cultivation and for enhancing global food security.Mollisols are experiencing severe soil erosion due to overfarming and a lack of mainte-nance.Thus,suitable soil and water conservation measures(SWCMs)are needed to protect Mollisols.However,how SWCMs respond to changes in slope gradient and rainfall and their effective application area remain ambiguous.Using a long-term field observation dataset,meta-analysis,and statistical test methods,we reveal the typical erosion reduction effect of SWCMs and their responses to changes in slope gradient and rainfall.Next,we calculated a coupling factor,P.S,by slope gradient and rainfall in flood season to determine the effective SWCMs application threshold.Compared with bare land,no-tillage(NT),contour ridge tillage(CT),ridge hedgerows(RH),and terraced fields(TF)had an average erosion reduction coefficient of 91.5%.There was a significant exponential increase in the correlation between P.S and the soil erosion amount in plots with typical measures.According to this correlation and soil loss tolerance(200 t/km^(2)),the upper limits of PS(NT:564 mm;CT:885 mm;RH:1135 mm)were determined and utilized to determine the effective application areas(NT:311.40103 km^(2);CT:320.86103 km^(2);RH:323.72103 km^(2))at the plot scale.In wet years,the applicable area of SWCMs declined toward the low-elevation foothills and flat terrain.All the results are applicable when slope length within 20 m.These results provide a basis for the precise allocation of SWCMs in Mollisols area and promote the scientific utilization of Mollisols resources.

CVD growth of perovskite/graphene films for high-performance flexible image sensor

Hybrid perovskite possesses excellent photoelectric properties,including large light-absorption capacity and high carrier mobility,and is an ideal light-absorbing material for photoelectric devices.The grain size and compactness of hybrid perovskite are key factors affecting the performance of photoelectric devices.The photocurrent and photoresponsivity of these devices are relatively low because of the rapidly recombined photoexcited electron-hole pairs in hybrid perovskite.Herein,we develop a facile two-step chemical vapor deposition(CVD)method to synthesize a high-quality van der Waals(vd Ws)MAPb I3/graphene heterostructure for high-performance image sensor.We introduced inorganic sources(PbI2)to vd Ws epitaxially grown Pb I2 film on a seamless graphene monolayer film template through CVD.Methylammonium iodide(MAI)was then reintroduced to prepare the vd Ws MAPb I3/graphene heterostructure.The MAPb I3 layer is composed of densely packed,large-size grains and displays a smooth surface.High photoresponsivity of 107A/W is achieved in the corresponding photodetector.Inspired by the human visual system,we designed a flexible photodetector array containing(24?24)pixels,achieving perfect image recognition and color discrimination.Our study may greatly facilitate the construction of high-performance optoelectronic devices in artificial retina,biomedical imaging,remote sensing,and optical communication.

河南卢氏和江西宜春两处锂矿山地表微生物群落分布特征差异及成因分析

【目的】揭示地表锂矿石表面和风化产物中细菌群落多样性特征。【方法】针对细菌16S rRNA片段扩增进行高通量测序,分析不同锂矿石表面及其风化产物中细菌群落组成、多样性及功能属性等信息。【结果】河南卢氏南阳山伟晶岩型锂矿石和江西宜春花岗岩型锂矿石表面及其风化产物的细菌群落多样性有差异。南阳山伟晶岩矿石与其风化产物、宜春花岗岩矿石表面和风化产物(NK-1、NK-1F、YK-1、YK-1F、YK-2、YK-2F、YK-3)的OTUs分别是1010、540、835、828、1117、974和604,其差异与不同的矿物组成显著关联。两矿山均有其优势微生物,在门水平上,两矿山均以放线菌门(Actinobacteria)、变形菌门(Proteobacteria)为优势菌门。同时两矿区微生物群落组成具有显著差异性(P<0.05),不同地理位置风化产物样本之间差异尤为显著(P<0.001);在属水平上,NK-1中相对丰度大于5%的属为鞘氨醇单胞菌属(Sphingomonas)、马赛菌属(Massilia);NK-1F为类芽孢杆菌属(Paenibacillus)、杆状细菌属(Bacillus)、马赛菌属(Massilia);YK-1F为芽球菌属(Blastococcus)、念珠菌固体杆菌属(Candidatus-Solibacter)、Noviherbaspirillum属、伯克霍尔德氏菌属(Burkholderia-Caballeronia-Paraburkholderia),YK-2为unidentified-Chloroplast属,YK-2F为北里孢菌属(Kitasatospora),YK-3为1174-901-12属、甲基杆菌属(Methylobacterium)。不同地理位置的矿石及其风化物样本的功能注释均涉及代谢、遗传信息处理、环境信息处理等6个代谢通路。【结论】16S rRNA高通量测序揭示不同地区锂矿石及其风化产物的细菌多样性存在差异,各具优势类群,样本间菌落组成、多样性及功能属性的差异与锂矿石化学组成、风化程度和地理分布密切相关。这项研究揭示了优势微生物类群的元素地球化学功能与含锂矿物地表风化的潜在联系,可为微生物生态分布研究及相关微生物资源开发提供新数据。

Superelastic wire-shaped supercapacitor sustaining 850% tensile strain based on carbon nanotube@graphene fiber

Stretchable and flexible supercapacitors are highly desired due to their many potential applications in wearable devices. However, it is challenging to fabricate supercapacitors that can withstand large tensile strain while maintaining high performance. Herein, we report an ultra-stretchable wire-shaped supercapacitor based on carbon nanotube@graphene@MnO2 fibers wound around a superelastic core fiber. The supercapacitor can sustain tensile strain up to 850%, which is the highest value reported for this type of device to date, while maintaining stable electrochemical performance. The energy density of the supercapacitor is 3.37 mWh·cm^-3 at a power density of 54.0 mW·cm^-3. The results show that 82% of the specific capacitance is retained after 1,000 stretch-release cycles with strains of 700%, demonstrating the superior durability of the elastic supercapacitor and showcasing its potential application in ultra-stretchable flexible electronics.

Ultrasmall Fe-doped carbon dots nanozymes for photoenhanced antibacterial therapy and wound healing

Pathogenic bacteria pose a devastating threat to public health.However,because of the growing bacterial antibiotic resistance,there is an urgent need to develop alternative antibacterial strategies to the established antibiotics.Herein,iron-doped carbon dots(Fe-CDs,~3 nm)nanozymes with excellent photothermal conversion and photoenhanced enzyme-like properties are developed through a facile one-pot pyrolysis approach for synergistic efficient antibacterial therapy and wound healing.In particular,Fe doping endows CDs with photoenhanced peroxidase(POD)-like activity,which lead to the generation of heat and reactive oxygen species(ROS)for Gram-positive and Gram-negative bacteria killing.This study demonstrates Fe-CDs have significant wound healing efficiency of Fe-CDs by preventing infection,promoting fibroblast proliferation,angiogenesis,and collagen deposition.Furthermore,the ultrasmall size of Fe-CDs possesses good biocompatibility favoring clinical translation.We believe that the nanozyme-mediated therapeutic platform presented here is expected to show promising applications in antibacterial.