Path Exploration of Autonomous Learning in College Students＇ Ideological and Political Theory Course

Ideological and political theory teaching course is the public compulsory course of college students, which is the effective measures of conducting socialism core value system education for college students and realizing the ideological political and moral quality cultivation and improvement of chinese characteristic socialism successors, the ideological and political theory course learning of college students has obvious features in chinese university education, reflecting the party central committee＇ s great attention to college students＇ ideological and political education, and we should strengthen college students＇ ideological and political theory education, explore autonomous learning path of university exploration college students and promote the combination of theory and practice of college students, realizing autonomous learning, autonomous education and autonomous improvement, in order to effectively improve the effect of ideological and political theory education.

Engineering of Ag@Pd/Al_(2)O_(3)with varied Pd-shell thickness:Dynamic evolution of ligand and strain effects on acetylene selective hydrogenation

Bimetallic nanoparticles exhibit a synergistic effect that critically depends on their surface composition,but such promotion mechanisms become vague with varying surface compositions.Here,alumina supported Ag@Pd core–shell and PdAg alloy structure with controlled size and surface compositions were prepared to demonstrate synergetic mechanisms,particularly,ligand and strain effects on activity and ethylene selectivity for acetylene hydrogenation.The performance evaluation indicates that Ag@Pd catalysts with well-controlled Pd-shell thickness can effectively lower apparent activation energy and improve ethylene selectivity.Hydrogenation 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 alloyed and monometallic counterparts.Combined characterizations and density functional theory are conducted to reveal such shell-thickness-dependent performance.The ligand effect arising from Ag alloying in the interface of Ag@Pd2ML observes the strongest binding of acetylene,but it diminished sharply and the strain effect gets more prevailing with increasing shell thickness.The competition of ethylene desorption and deephydrogenation 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 NPs.The exploration of synergetic mechanisms among bimetallic NPs with varied structure and surface compositions in this work can help us to deepen the understanding catalyst structure–activity relationship and provide a feasible way to optimize the overall catalytic performance.

Synthesis,Crystal Structure and Antimicrobial Study of a New Schiff Base 2-{(2'-Benzyl)iminoethyl}-5-methoxyphenol

The Schiff base, 2-{（2′-benzyl）iminoethyl}-5-methoxyphenol （C6H4CH2N=C（CH3）C6H3- （OMe-5）OH） 1, was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The compound crystallizes in the orthorhombic system, space group Pbca with a = 8.9849（10）, b = 13.2699（15）, c = 22.975（2） A ,V= 2739.3（5） A^3, Mr= 255.31, Z= 8, F（000） = 1088, Dc = 1.238 g/cm^3, T= 293 K, μ = 0.082 mm^-1, λ = 0.71073 .A, the final R = 0.0596 and wR = 0.1575 for 1934 observed reflections with I 〉 2σ（I）. The complex was valued for its antimicrobial activity against bacterial strands using the agar diffusion method, and found to be active against the four test bacterial organisms.

Synthesis, Characterization and Antimicrobial Study of a New Schiff Base Paeonol-phenylpropanolamine

A novel Schiff base compound was synthesized by the reaction of paeonol and phenylpropanolamine in absolute methanol. It was characterized by elemental analyses, IR, tH NMR and X-ray single-crystal diffraction. The compound crystallizes in the wiclinic system, space group PI, with a = 6.4075（11）, b = 10.2821（18）, c = 12.573（2） A, α = 92.606（3）,β= 100.980（3）, γ = 90.994（3）°, V= 812.1（2） A3, Mr = 299.36, Z = 2, F（000） = 320, Dc=1.224 g/cm^3, T= 293（2） K,μ = 0.083 mm^-1 and 2 = 0.71073 A, the final R = 0.0555 and wR = 0.1619 for 2442 observed reflections with I 〉 2σ（I）. The colnpound was valued for its antimicrobial activity against bacterial strands using the agar diffusion method. It is found to be active against Candida albicans and Staphylococcus aureus.

Comparative Research on Sino-US Agricultural Innovation Model in Science and Technology

This research was conducted to provide a comparative analysis of China's and US's agricultural innovation in science and technology and offer some guidance on the construction of agricultural innovation system in science and technology in China. The countermeasures are proposed with a hope to shorten China's and US's gap of agricultural innovation in science and technology by analyzing agricultural innovation model features in science and technology of the United States. The advantages of United States model of agricultural innovation in science and technology include sound legal framework safeguard, complete scientific and technological innovation system, high quality and talented personnel, sufficient technical development and extension funding, and extensive applications of modern agricultural high-tech. There is a gap in agricultural innovation between China and the United States. Agriculture innovation in science and technology in China should improve in several aspects such as agricultural legislation, construction of sound agricultural innovation system in science and technology, building first-class agricultural innovation and extension teams, establishing diversified channels for investment, and improving the applications of high technology in agriculture.

Synthesis,Crystal Structure and Antimicrobial Study of N,N,N'-Tris(3-aminopropyl)ethylenediamine Copper(Ⅱ) Diperchlorate

The title compound [Cu（C11H29N5）]（ClO4）2 was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The compound crystallizes in the monoclinic system, space group P21/n with α = 9.405（2）, b = 14.495（3）, c = 14.715（3） A, β= 90.262（3）°, V=2006.1（7） A^3,M,=493.83,Z=4,F）（000）= 1028,Dc= 1.635 g/cm^3, T= 298（2） K,μ= 1.403 mm^-1 and = 0.71073 A. The was refined to R = 0.0508 and wR = 0. 1250 for 2293 observed reflections with I 〉 2σ（I）. The Cu（Ⅱ） atom possesses a five-coordtinate CuN5 environment which shows a slightly distorted square-pyramidal geonetry. Antimicrobial activity study found that the complex is active against Salmonella species, Staphylococcus aureu, Bacillus pumilus and Bacillus coliforms.

Synthesis and Crystal Structure of a New Ternary Mixed Ligand Complex [Cu(ampym)(bapa)Cl](ClO_4) (ampym = 2-Aminopyrimidine, bapa = Bi(3-aminopropyl)amine)

The title complex [Cu（ampym）（bapa）Cl]（ClO4） （C10H22Cl2CuN6O4） was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The crystal crystallizes in the orthorhombic system, space group Pna21 with a = 11.9904（12）, b = 15.9796（16）, c = 8.9 i 43（9） A^°, V = 1708.0（3）A^°3 Mr = 424.78, Z = 4, F（000） = 876, Dc = 1.652 g/cm^3, T = 293 K,μ =1 .619 mm^-1 and λ=0.71073 A^°. The structure was refined to R = 0.0240 and wR ： 0.0564 for 2905 observed reflections with I 〉 2σ（I）. Flack = 0.039（12）.

A Rank-Sum Testing Method for Multi-Trait Comprehensive Ranking and Its Application

The rank-sum test is a nonparametric method used in variety evaluation. However, the hypothesis testing of the method hasn＇t been established for multi-trait comprehensive ranking. In this paper, under null hypothesis H0： the variety＇s ranking on each trait is random, the theoretical distribution of sum of ranks （SR） was firstly derived and further used to obtain the critical values for multi-trait comprehensive evaluation in rank-sum testing. A new C＋＋ class and its basic arithmetic were defined to deal with the miscount caused by the precision limitation of built-in data type in common statistical software under large number of varieties and traits. Finally, an application of the theoretical results was demonstrated using five starch viscosity traits of 12 glutinous maize varieties. The proposed method is so simple and convenient that it can be easily used to rank different varieties by multiple traits.

Weak Field-Induced Evolution of Spiral Wave in Small-World Networks of Hodgkin–Huxley Neurons

An external weak electric field is introduced into the small-world networks of Hodgkin–Huxley neurons to study the control and breakup of a spiral wave.The effect of an external electric field on the neurons in the small-world network is described by an additive perturbation on the membrane potentials of neurons at the cellular level,in which an additive term VE is imposed on the physiological membrane potential.A statistical factor of synchronization is used to measure the collective behaviour of spiral waves by changing the electric field;it is confirmed that a smaller factor of synchronization is associated with the survival of a spiral wave.In the case of no channel noise,the spiral wave could be removed under a certain intensity of constant electric field;it keeps robustly to the weak electric field when the electric field changes periodically.In the case of weak channel noise,a breakup of the spiral wave is observed when the intensity of the electric field exceeds certain thresholds,which could be measured from the curve for synchronization factors.No drift of the spiral wave is observed under the weak electric field.

Existence and Stability Analysis of Fractional Order BAM Neural Networks with a Time Delay

Based on the theory of fractional calculus, the contraction mapping principle, Krasnoselskii fixed point theorem and the inequality technique, a class of Caputo fractional-order BAM neural networks with delays in the leakage terms is investigated in this paper. Some new sufficient conditions are established to guarantee the existence and uniqueness of the nontrivial solution. Moreover, uniform stability of such networks is proposed in fixed time intervals. Finally, an illustrative example is also given to demonstrate the effectiveness of the obtained results.

Applications of the Differential Operator to the Class of p-Valent Functions

In this paper, we define some new subclasses of strongly close-to-star and strongly close-to-convex p-valent functions defined in the open unit disc by using a differential operator. Some inclusion results, convolution properties are studied.

Computer Desktop Image Compression Technology Based on the Clustering Algorithm

The clustering algorithm has a very important application in the data mining technology,and can achieve good results in the data classification operation.With the rapid development of the network communication technology and the personal computers and other digital devices,the real-time computer desktop image transmission technology has been widely used.The computer desktop image compression algorithm based on the block classification can effectively realize the compression and storage of the computer desktop images,and significantly improve the speed and quality of the computer desktop image transmission.

Control Chaos in System with Fractional Order

In this paper, by utilizing the fractional calculus theory and computer simulations, dynamics of the fractional order system is studied. Further, we have extended the nonlinear feedback control in ODE systems to fractional order systems, in order to eliminate the chaotic behavior. The results are proved analytically by stability condition for fractional order system. Moreover numerical simulations are shown to verify the effectiveness of the proposed control scheme.

The structural decoration of Ru catalysts by boron for enhanced propane dehydrogenation

Propane dehydrogenation(PDH)is an efficient technology for the direct production of propylene.Nevertheless,current PDH catalysts mainly rely on precious Pt or toxic Cr and especially undergo severe coke deposition.Herein,we report a Ru catalyst decorated by boron species(Ru-3B/Al_(2)O_(3)),which exhibits high catalytic performance for PDH.HAADF-STEM,EELS,and CO-FTIR characterization are used to identify the surface structure of the Ru active component,which shows that the high-energy unsaturated coordination sites,including corners,edges and step atoms for Ru-3B/Al_(2)O_(3),are appropriately modified by BO_(x)species.The encapsulation of high-energy active sites prone to Csingle bondC cracking and deep dehydrogenation leads to higher propylene selectivity(>95%)and strong carbon resistance(kd 0.0007 min)over Ru-3B/Al_(2)O_(3).The XPS and H2-TPR results show that the migration of B species is driven by the reduction of B_(2)O_(3)to B2O2 and that the coating degree of Ru particles is controlled by the chemical valance of Ru species.

Preparation and gaseous photocatalytic activity of smooth potassium dititanate film

A new smooth potassium dititanate film was prepared by sol-gel method and characterized by thermogravimetry(TG)and differential scanning calorimetry(DSC),X-ray diffraction(XRD),atomic force microscopy(AFM),UV-Visible diffuse reflectance and Raman spectroscopy.The gaseous photocatalytic activity of smooth K_(2)Ti_(2)O_(5)films was studied using contact angle analysis from the photocatalytic decomposition of octadecyltrichlorosilane(OTS)based self-assembled monolayers(SAMs)formed on K_(2)Ti_(2)O_(5)films.The photocurrent response of the film was determined by an electrochemical method.It was shown that the films were smooth,compact,and transparent when formed on glass.Compared with TiO_(2)film,the K_(2)Ti_(2)O_(5)film showed wide absorption in the ultraviolet and visible region.It was found that the monolayers on K_(2)Ti_(2)O_(5)decomposed much faster than those on TiO_(2)under UV irradiation of 254 nm in air.The film also exhibited a stronger photoresponse and a more stable anodic photocurrent.The K_(2)Ti_(2)O_(5)film efficiently decomposes the alkylsiloxane monolayers under UV irradiation in air and it was found to be a good photocatalyst for gaseous organic pollutant treatment.