Rational solutions of Painlevé-Ⅱequation as Gram determinant

Under the Flaschka-Newell Lax pair,the Darboux transformation for the Painlevé-Ⅱequation is constructed by the limiting technique.With the aid of the Darboux transformation,the rational solutions are represented by the Gram determinant,and then we give the large y asymptotics of the determinant and the rational solutions.Finally,the solution of the corresponding Riemann-Hilbert problem is obtained from the Darboux matrices.

Removal of fluoride from aqueous solution onto Zr-loaded garlic peel (Zr-GP) particles

Garlic peel,as the raw material,was modified by loading with zirconium(IV),exhibiting quite good uptaking behaviour for fluoride anion.The adsorption experiments were carried out in batch shaking vessels,and the process was strongly dependent on the pH value.The adsorption fits Langmuir model well,and the maximum adsorption capacities at equilibrium pH 2 and 6 are evaluated to be 1.10 and 0.89 mol(fluoride)/kg of Zr-loaded garlic peel gel,respectively.The evaluation of effects of coexisting anions such as nitrate,sulfate and phosphate shows that nitrate and sulfate have no negative effect on the adsorption of fluoride,while phosphate has a little effect.Adsorption kinetics of fluoride is well described by pseudo-second-order rate equation,and the corresponding adsorption rate constant is calculated to be 3.25×10?3 g/(mg·min).

Analytical and Traveling Wave Solutions to the Fifth Order Standard Sawada-Kotera Equation via the Generalized exp(-Φ(ξ))-Expansion Method

In this article, we propose a generalized exp(-Φ(ξ))-expansion method and successfully implement it to find exact traveling wave solutions to the fifth order standard Sawada-Kotera (SK) equation. The exact traveling wave solutions are established in the form of trigonometric, hyperbolic, exponential and rational functions with some free parameters. It is shown that this method is standard, effective and easily applicable mathematical tool for solving nonlinear partial differential equations arises in the field of mathematical physics and engineering.

Behavior of Cl^- Ions in Ag(SO_3)_2^(3-) Solution

ＢｅｈａｖｉｏｒｏｆＣｌ－ＩｏｎｓｉｎＡｇ（ＳＯ３）３－２ＳｏｌｕｔｉｏｎＷａｎｇＸｕｅｗｅｎａｎｄＨｕＪｉａｎｈｕｉ（王学文）（胡建辉）ＧｕｉｘｉＳｍｅｌｔｅｒ，ＪｉａｎｇｘｉＣｏｐｐｅｒＣｏｒｐｏｒａｔｉｏｎ，Ｇｕｉｘｉ３３５４２４，ＣｈｉｎａＲ...

Rapid Expansion of Supercritical Solution of Poly (1,1,2,2- Tetrahy-droperfluorodecyl Acrylate)

Poly(1,1,2,2- tetrahydroperfluorodecyl acrylate) (poly (TA-N)) was synthesized in laboratory. The resulting morphology of rapid expansion of supercritical solution (RESS) sprays of poly(TA - N) was investigated. At apre - expansion temperature of 45℃), amorphous polymer was formed. At temperature around 60 ℃ to 80 ℃ , fibers were formed. Increase of temperature increasesparticle size slightly. At temperature of 105℃ , most of particles are spheres. The RESS is an attractive process. To apply the polymers desired for coating applications in an organic solvent - free process that is economically viable , and it will have implications for pollution prevention during polymer film

EXACT SOLUTION FOR RECTANGULAR SLAB WITH THREE EDGES SIMPLY-SUPPORTED AND OTHER FREE

In this paper,we give all-sided pastic analysis of the rectangular slab with three edges simply-supported and other free.Here we discuss the following four cases:(1)The uniformly distributedload over the area a slab.(2).A concentrated load act at midpoint of free edges slab.(3)A concen-trated load act at the center a slab.(4)The line load act along free edge of slab.

Exact Traveling Wave Solutions of Nano-Ionic Solitons and Nano-Ionic Current of MTs Using the exp(-φ (ξ ))-Expansion Method

In this work, the exp(-φ (ξ )) -expansion method is used for the first time to investigate the exact traveling wave solutions involving parameters of nonlinear evolution equations. When these parameters are taken to be special values, the solitary wave solutions are derived from the exact traveling wave solutions. The validity and reliability of the method are tested by its applications to Nano-ionic solitons wave’s propagation along microtubules in living cells and Nano-ionic currents of MTs which play an important role in biology.

Novel traveling wave solutions and stability analysis of perturbed Kaup-Newell Schrodinger dynamical model and its applications

We study the traveling wave and other solutions of the perturbed Kaup-Newell Schrodinger dynamical equation that signifies long waves parallel to the magnetic field.The wave solutions such as bright-dark(solitons),solitary waves,periodic and other wave solutions of the perturbed Kaup-Newell Schrodinger equation in mathematical physics are achieved by utilizing two mathematical techniques,namely,the extended F-expansion technique and the proposed exp(-φ(ξ))-expansion technique.This dynamical model describes propagation of pluses in optical fibers and can be observed as a special case of the generalized higher order nonlinear Schrodinger equation.In engineering and applied physics,these wave results have key applications.Graphically,the structures of some solutions are presented by giving specific values to parameters.By using modulation instability analysis,the stability of the model is tested,which shows that the model is stable and the solutions are exact.These techniques can be fruitfully employed to further sculpt models that arise in mathematical physics.

Combining Experimental and Quantum Chemical Study of 2-(5-Nitro-1,3-Dihydro Benzimidazol-2-Ylidene)-3-Oxo-3-(2-Oxo-2H-Chromen-3-yl) Propanenitrile as Copper Corrosion Inhibitor in Nitric Acid Solution

Due to acidic solutions aggressiveness, corrosion inhibitors use is considered to be one the most practical methods to delay metals dissolution in the said solutions. In this study benzimidazolyl derivative namely 2-cyanochalcones 2-(5-nitro-1,3-dihydrobenzimidazol-2-ylidene)-3-oxo-3-(2-oxo-2H-chromen-3-yl) propanenitrile which was synthesized was then applied as a corrosion inhibitor for copper in 1 M HNO3 solution. The inhibition action of this molecule was evaluated by gravimetric and density functional theory (DFT) methods. It was found experimentally that this compound has a better inhibition performance and its adsorption on copper surface follows Langmuir adsorption isotherm. This adsorption evolves with temperature and inhibitor concentration, it is endothermic and occurs spontaneously with an increase in disorder. Corrosion kinetic parameters analysis supported by Adejo-Ekwenchi model revealed the existence of both physisorption and chemisorption. DFT calculations related that compound adsorption on copper surface is due to its electron donating and accepting capacity. The reactive regions specifying the electrophilic and nucleophilic attack sites were analyzed using Fukui and dual descriptor functions. Experimental results obtained were compared with the theoretical findings.

GC-MS法测定大蒜中的挥发性物质

大蒜(Allium satiuvm L.)是多年生草本百合科植物大蒜的鳞茎,按皮的颜色不同可分为紫皮蒜和白皮蒜两种[1].大蒜原产于意大利的西西里岛,约在两千多年前传入我国.大蒜不仅是极佳的调味食品,而且还有很好的药用功能.……

Preparation and optical properties of solid solution semiconductor (Zn_xCd_(1-x)S) doped silica glasses

Semiconductor(Zn\-\%x\%Cd 1-x S) doped silica glasses were prepared by Sol_Gel process and \%in situ\% growth technique. The structure of the materials was characterized by X_ray diffraction technique, the particle size of semiconductor crystallites from X_ray patterns was estimated less than 10 nm. From absorption spectra, it is obtained that the absorption edges shifted to short wavelength diraction when Zn contents increased, and the absorption edge can be adjusted from 2.46 eV to 2.96 eV by controlling Zn contents. The third_order nonlinear optical susceptibility was studied at 532 nm with 8 ns pulse laser by degenerate four wave mixing (DFWM) technique.

Distribution of P2O5 between solid solution and liquid phase in dephosphorization slag of CaO-SiO2-FeO-P2O5-Na2O system

A multi-phase slag containing Na2O is potential to efficiently dephosphorize high-P hot metal.After dephosphorization,the generated slag with high P2O5 content is regarded as a P resource.Because P2O5 was mainly concentrated in the 2CaO SiO2-3CaO P2O5 solid solution,the recovery of P from dephosphorization slag primarily depends on the separation of the solid solution from other phases.The distribution ratios of P2O5 between solid solution and liquid phase in the CaOSiO2-FeO-P2O5-Nslag system were investigated.The results indicated that the addition of Na2O facilitated the enrichment of P2O5 in the solid solution because it increased not only the distribution ratio of P2O5 but also the mass fraction of the solid solution.The distribution ratio of P2O5 was independent of the P2O5 content in slag.A higher P2O5 content in slag resulted in higher P2O5 and Na2O contents in the solid solution.The distribution ratio of P2O5 increased with the total Fe content in the liquid phase,regardless of the valence of Fe.An increase in the FeO content in slag brought a higher P2O5 content in the solid solution.As slag basicity increased,the distribution ratio of P2O5 increased,but the P2O5 content in the solid solution decreased.

大蒜提取液对烟草黑胫病和青枯病的防治效果初探

研究了大蒜提取液对烟草黑胫病菌(Phytophthora parasiticavarnicotianae)和青枯病菌(Ralstonia solanacearum)的抑制作用,并进一步测定了大蒜提取液防治烟草黑胫病的效果。结果表明,浓度大于1.5%的大蒜提取液对于烟草青枯病菌的抑菌半径与5000倍72%农用链霉素相当,浓度大于1.5%的大蒜提取液对烟草黑胫病菌的抑菌效果显著;而盆栽试验表明,只有稀释倍数小于10倍的大蒜提取液才对烟草黑胫病具有防治效果,而稀释倍数大于10倍的大蒜提取液对烟草黑胫病基本没有防治效果。

大蒜液和食醋对副溶血性弧菌杀灭效果的试验研究

目的观察大蒜与食醋及其复方消毒液对副溶血性弧菌的杀灭效果及影响因素。方法用悬液定量杀菌试验进行了实验研究。结果用大蒜原液对副溶血性弧菌作用30 m in,杀灭率为100%;食醋原液对副溶血性弧菌作用5 m in、体积分数50%食醋作用15 m in,杀灭率均为100%。以体积分数为3.13%大蒜液与3.13%食醋组成的复方溶液对副溶血性弧菌作用2 m in,杀菌率亦为100%。大蒜液与食醋的杀菌效果均随温度升高逐渐增强,菌悬液中含25%以上小牛血清对大蒜液和食醋杀菌效果有一定影响。结论大蒜液与食醋单用或复方均可杀灭悬液中副溶血性弧菌,其杀菌效果受有机物影响。

不同配方叶面喷施剂对大蒜生长及产量和品质影响

为解决大蒜返青期灌水施肥,降低地温、大蒜生长受阻、产量品质降低等问题,以河南市售各种叶面喷施剂为试验材料,采用田间小区试验,研究不同配方叶面喷施剂对大蒜生长及产量和品质的影响。结果表明,不同配方叶面喷施剂均可增加大蒜蒜头的产量,与对照相比增产1.91%~17.25%,并能促进植株的生长,显著提高提高大蒜蒜头可溶性糖、可溶性蛋白含量,且叶面肥复配效果优于单施。其中齐齐发＋海威施＋施柏利的处理,大蒜鲜蒜头产量最大,产量为20176.81 kg/hm2,比对照增产17.25%。

大蒜液抗菌活性的研究

为评价大蒜液的抗菌活性,以2×105cfu/mL的芽孢杆菌、金黄色葡葡球菌和大肠杆菌为受试菌,进行体外抑菌试验,测定大蒜液的最低抑菌浓度(MIC)和最小杀菌浓度(MBC)。结果表明:大蒜液对3种细菌都有较强的抑制作用,并且抑制的效果随着大蒜液体积分数降低而逐渐降低,其中大蒜液对芽孢杆菌抑制作用最强,金黄色葡萄球菌次之,大肠杆菌最弱。大蒜液对芽孢杆菌、金黄色葡葡球菌和大肠杆菌的MIC分别为40%、60%、80%,MBC分别为40%、60%、原液。

钾含量变化对无土栽培宝坻大蒜生长的影响

设置不同钾浓度的营养液处理,通过对宝坻大蒜植株长势和质量的观测,分析钾浓度变化对宝坻大蒜生长的影响。结果表明:基质栽培宝坻大蒜在不同浓度的钾含量的营养液处理后,其株高、茎粗、节间长及收获后的整株质量、地上部分质量、地下部分质量均有一定的差异,其中以钾浓度为234.59mg/L的营养液配方与其他处理差异最大,各项指标达到了最大值,说明钾浓度含量为234.59mg/L的营养液配方最适合宝坻大蒜的生长。

钾对水培大蒜蒜薹和鳞茎鲜质量及氮磷钾含量的影响

在设施水培条件下,以金乡白皮蒜为试材探讨了钾对水培大蒜蒜薹和鳞茎鲜质量及氮磷钾含量的影响。试验设置0、3.0、6.0、9.0和12.0 mmol/L 5个K＋水平。结果表明,在营养液K＋浓度0-9.0 mmol/L范围内,蒜薹粗度、蒜薹鲜质量、鳞茎横径、头型指数及单头鲜质量随营养液K＋浓度的升高而增加,至K＋浓度9.0 mmol/L时达最大,较不施钾处理分别提高80.01%、258.70%、66.16%、22.56%和258.70%;当营养液K＋浓度为12.0 mmol/L时上述指标下降。营养液K＋浓度9.0 mmol/L时蒜薹及鳞茎全钾含量最高,较不施钾处理分别提高483.50%和399.25%。不施钾处理蒜薹及鳞茎全氮全磷含量均高于各施钾处理,施钾处理间全氮全磷含量均以K＋浓度9.0 mmol/L时较高。充足的钾可显著增加水培大蒜蒜薹及鳞茎鲜质量,增加大蒜全钾含量,并以营养液K＋浓度9.0 mmol/L时上述指标表现最好。

短腔干涉式光纤微压传感器解调方法研究

为了提高短法珀腔干涉式微压传感器峰值解调法的精度,本文研究了基于法珀干涉的石墨烯光纤微压传感器的解调方法。利用FDTD Solutions光学仿真软件仿真模拟传感器的反射光谱,搭建了传感器测试系统。采用Savitzky-Golay卷积平滑滤波和洛伦兹局部拟合相结合的峰值解调法,并利用多峰解调法解调出腔长,分析压力和腔长的关系。实验结果表明:采用Savitzky-Golay卷积平滑滤波明显滤除噪声信号,洛伦兹拟合寻找波谷的精度优于高斯拟合寻找波谷的精度,在0~0.1 MPa范围,传感器灵敏度为73.766 nm/kPa。