NaF-AlF3-LiF/KF熔盐体系的分子动力学势参数拟合研究

由于我国北方地区铝土矿提取的氧化铝中含有钾、锂,导致我国铝电解质富含KF和LiF,使得电解质组分和物理化学特性发生变化。为此,本文采用对势拟合和力匹配相结合的方法,拟合得到了高精度的NaF-AlF3-LiF/KF熔盐体系Born-Mayer-Huggins势参数,获得的势参数对微观粒子受力的拟合平均偏差方为0.0796,对密度和粘度等宏观性质计算偏差小于5%,表明其适用于NaF-AlF3-LiF/KF基电解质微观结构和宏观性质的模拟计算研究。

聚势合依 智联未来 2020•依米康精英合作伙伴峰会全纪实

6月13日〜14日,以"聚势合依,智联未来"磅礴八字为主题的“2020依米康精英合作伙伴战略峰会”在依米康科技集团总部所在地、天府成都隆重举行!来自全国各地的依米康精英合作伙伴们飞赴蜀地,济济聚首一堂,共议数据中心佳话,共商精诚合作之道。

基于密度泛函理论的KF-NaF-AlF3低温电解质体系势参数拟合及分子动力学模拟

基于密度泛函理论构建KF-NaF-AlF3熔盐体系的Buckingham势参数,基于所构建的势参数对KF-NaF-AlF3熔盐体系进行分子动力学模拟。研究结果表明:熔盐中主要的阴离子构型为F^-,[AlF4]^-,[AlF5]^2-和[AlF6]^3-;由于桥氟离子的存在,熔盐中形成了更复杂的Al-F-Al络合离子构型,如[Al2F8]^2-,[Al3F10]^-,[Al4F14]^2-,[Al4F15]^3-和[Al4F16]^4-等,这些复杂阴离子的存在可能会进一步降低KF-NaF-AlF3熔盐的输运性能。

潜水蒸发经验公式分段拟合研究

针对大气蒸发力较大时 ,采用一般常用的阿维里扬诺夫、指数型、幂函数型公式会过高估计潜水蒸发量的实际问题。基于土壤水动力学原理 ,在分析不同潜水位埋深下潜水蒸发强度与大气蒸发力的关系的基础上 ,提出了临界大气蒸发力的概念和潜水蒸发公式分段拟合方法。应用实例表明 :该方法可以解决实际工作中过高估计潜水蒸发量的问题。

运用民间美术造型营造包装的“势”

分析了中国民间美术的文化特征,并从4个方面介绍了运用民间美术造型营造包装"势"的实施方法:依据商品的特性选择合"意"的民间造型;根据设计主体的定位择选合"势"的民间造型;借用民间造型的"势"设计包装的内外结构;通过民间造型的编排营造包装整体的气"势"。从而强化包装外观的视觉动势,使包装的文化趋向更加突显。

论大学章程制定的“三合”原则

章程是大学依法管理的总纲,其优劣直接影响着学校的管理质量。大学章程的制定必须遵循三个方面的原则:合法原则、合理原则、合势原则。具体包括,要坚持法律优位、法律保留、比例、程序正当等原则;要确立以学术权力为中心,学术权力与行政权力并存的管理模式;要传承历史、立足现实、适度超前,展现自己的时空特色。

Variation of Agronomic Characters of F_2 of Predominance Cotton Combination and Its Utilization Evaluation

The agronomic property of elite cotton hybrid F2 was studied and the results showed that each investigated trait showed consecutive normal distribution except micronaire,so they were typically quantitative characters controlled by micro-effect polygene.Heterosis analysis indicated that the inbreeding depression of F2 generation was significant,and the heterosis was less than F1 in yield and its component traits,but the yield of F2 generation was prior to the control.Heterosis of most fiber property was very low,some of which were negatively significant.The entire variations indicated that the segregation of fiber property trait was objective and abundant in F2 population.

Identification of the Parentage of Corn Variety Using SSR Markers

[Objective] The study was to explore the molecular interpretation standards on parentage in the seeds of corn variety. [Method] With 16 hybrids and their parents and 202 inbred elites as materials for screening primers, the artificial groups of two standard diad and two standard triad were respectively established as the verification materials. Genomic DNA of seedlings was extracted by using CTAB method. 137 pairs of SSR primers were selected for SSR amplification and product detection, which was used for the parentage identification of maize varieties. [ Result] Twenty pairs of corn primers with high polymorphism information content （ PIC value）, clearly amplified bands and good reproducibility were screened from 137 pairs of corn SSR primers tested. The identification results of using SSR molecular were consistent with the actual situation. [ Conclusion] It is feasible to identify the parentage of maize variety using SSR markers.

Spatial pattern of dominant tree species of the secondary monsoon rain forest in Lianjiang, Guangdong Province

Based on the summed dominance ratios of species in sample plots, the first three dominant species (Litchi chinensis, Elaeocarpus sylvestris and Canarium album) of the secondary monsoon rain forest of Mt. Royal Shoe in Lianjiang City, western Guangdong, were chosen for analyzing their spatial distribution pattern with the analysis methods such as frequency models of Poisson Distribution, Two Negative Items Distribution, Neyman Distribution, aggregate indexes, Taylor exponential equation and Iwao’s equation modeling. The results showed that these three species distributed in the congregate spatial pattern. Litchi chinensis and Elaeocarpus sylvestris had the characteristic of basic congregate population and attractive characteristic between their plants. The patterns for Canarium album may change and become more evenly distributed with the increase of density. The overall species spatial pattern also depended on the conservation of the secondary monsoon rain forest besides it was affected by the species reproduction characteristics and its growing environment. The congregate spatial patterns of three dominant species showed that it is important to conserve forest urgent conservation of the forest.

Density ＇Functional Theory Study on Mechanism of Forming Spiro-Geheterocyclic Ring Compound from Me2Ge--Ge： and Acetaldehyde

The H2Ge=Ge：, as well as and its derivatives （X2Ge=Ge：, X=H, Me, F, C1, Br, Ph, At, ...） is a kind of new species. Its cycloaddition reactions is a new area for the study of germylene chemistry. The mechanism of the cycloaddition reaction between singlet Me2Ge=Ge： and acetaldehyde was investigated with the B3LYP/6-31G＊ method in this work. From the potential energy profile, it could be predicted that the reaction has one dominant reaction pathway. The reaction rule is that the two reactants firstly form a four-membered Ge-heterocyclic ring germylene through the [2＋2] cycloaddition reaction. Because of the 4p unoccupied orbital of Ge： atom in the four-membered Ge-heterocyclic ring germylene and the ~ orbital of acetaldehyde forming a r^--~p donor-acceptor bond, the four-membered Ge-heterocyclic ring germylene further combines with acetaldehyde to form an intermedi- ate. Because the Ge atom in intermediate happens sp3 hybridization after transition state, then, intermediate isomerizes to a spiro-Ge-heterocyclic ring compound via a transition state. The research result indicates the laws of cycloaddition reaction between Me2Ge=Ge： and ac- etaldehyde, and lays the theory foundation of the cycloaddition reaction between H2Ge=Ge： and its derivatives （X2Ge=Ge：, X=H, Me, F, C1, Br, Ph, At, ...） and asymmetric ^-bonded compounds, which are significant for the synthesis of small-ring and spiro-Ge-heterocyclic ring compounds.

Comparative Advantage of Maize Production in Jilin Province

The comparative advantage of maize production in Jilin Province was analyzed based on the sow area index,unit yield index,benefit index and comprehensive comparative advantage index in this study.The results showed that compared with other provinces in China,there was obvious comparative advantage in sow area index and unit yield index of maize in Jilin,the average of which stood for the first and the fourth in China from 2002 to 2006;there was no comparative advantage of benefit index compared with the average value of the whole countries,the average of which stood for the 14th in China from 2002 to 2006;the comprehensive comparative advantage in Jilin provincial maize production showed significant comparative advantage,the average of which stood for the fourth in China from 2002 to 2006.On the basis of the above,the suggestions to develop maize production in Jilin province had been put forward.

Ab initio Study on Formation Mechanism of Spiro-Si-Heterocyclic Ring Compound Involving Ge from H2Ge=Si： and Formaldehyde

H2Ge=Si： and its derivatives （X2Ge=Si：, X=H, Me, F, C1, Br, Ph, Ar, ...） are new species. Its cycloaddition reactions are new area for the study of silylene chemistry. The cycloaddition reaction mechanism of singlet H2Ge=Si： and formaldehyde has been investigated with the MP2/aug-cc-pVDZ method. From the potential energy profile, it could be predicted that the reaction has one dominant reaction pathway. The reaction rule is that two reactants firstly form a four-membered Ge-heterocyclic ring silylene through the [2＋2] cycloaddition reaction. Because of the 3p unoccupied orbital of Si： atom in the four-membered Ge-heterocyclic ring silylene and the π orbital of formaldehyde forming a π--p donor-acceptor bond, the four-membered Ge-heterocyclic ring silylene further combines with formaldehyde to form an intermediate. Because the Si： atom in the intermediate undergoes sp3 hybridization after transition state, then the intermediate isomerizes to a spiro-Si-heterocyclic ring compound involving Ge via a transition state. The result indicates the laws of cycloaddition reaction between H2Ge=Si： or its derivatives （X2Ge=Si：, X=H, Me, F, Cl, Br, Ph, Ar, ...） and asymmetric π-bonded compounds are significant for the synthesis of small-ring involving Si and Ge and spiro-Si-heterocyclic ring compounds involving Ge.

Relationship Between Ecophysiological Features and Grain Yield in Different Soybean Varieties

Photosynthetic rate ( P n ), transpiration rate ( E ), stomatal conductance ( g s ), water use efficiency ( WUE ), intercellular CO 2( C i ) and leaf water potential ( Ψ ) in varieties of soybean ( Glycine max (L.) Merr.) measured in the past three decades (1970s, 1980s and 1990s) and their inter_relationships were analyzed. These parameters of soybean changed with development stages. It is shown that there was a strongly positive relationship between the yield of soybean and its net photosynthetic rate. Soybean varieties with high yield potential had higher P n , g s and Ψ than those with low yield potential. Their values of C i were remarkably lower. Such relationship was especially remarkable at the critical stage of pod_bearing. P n of soybean of high yield was obviously higher than that of low yield. Of the different stages, the highest P n was found in the pod_bearing stage and other values were higher, too. P n and Ψ of modern soybean varieties were higher and such was continuing. Increased partitioning of carbon to seed and the size of sink may also be important for yield formation when P n values were remarkably higher in the pod_bearing stage.

排打硬气功

排打硬气功,是峨嵋功法内功、外功练习的有机结合。内功练到相当“火候”以后,硬气功会自然地因内气充实而功成。内功通过形体、呼吸、意念的运作,可使内气运聚,形成动力核心,并借此以气运力,发动体内真气产生爆发力,从而提高人体承受力和抗外力。 排打硬气功共有四步功法:一是“丹田功”,亦称气功散;二是“腹背功”;三是“胸助功”;四是“浑元功”。排打硬气功要经过三层功夫的磨练:一层功夫是练其形似,使动作协调、连贯、准确。即反复地练习体验,形成正确的动作动力定型。二层功夫是练气自然畅达,每一个动作与呼吸配合协调、准确,使呼吸与动作有机地结合在一起,达到以气摧力、以力助势,形、气、力、势合一的功效。三层功夫是用意领气。

今年1—8月我国木浆、纸品出口数量价值金额齐增

今年1—8月份我国木浆、废纸及纸板出口情况总体来看是上行的,出口数量有了一半以上的增幅。由于木浆、废纸及纸板总体行情与去年同期相比较,有了将近三成的大幅下滑,因此今年上半年我国木浆和纸品出口价值金额也亦步亦趋地受到了一定影响,尽管如此仍然比去年同期增长了三成之多,但就具体品种而言,出口数量却增减各异,尤其是一般机械木浆、化学木浆、烧碱木浆、亚硫酸盐木浆和废纸都有较大幅度的下降,但两个出口扛鼎＂大头＂——其它纤维木浆和新闻纸却体现了快速增加,尤其是后者竟然增长了1倍以上出口数量,以致影响出口总量大趋势显示增长趋势。

Chemical Property Variation Trend Analysis and Quality Evaluation of Water in Wei River

[Objective] Water quality variation trend of Wei River was analyzed and the water quality evaluation was performed in this study. [Method] Stationing and water sampling were conducted along Wei River at three different sites during the 12 months from January to December of 2014, the water samples were pre-treated and analyzed on chemical pollution indexes with the national standard, water quality data of Wei River in the 12 months was processed with periodic time series method, Spearman rank correlation coefficient was adopted to test pollution changing trend, and water quality status of Wei water was evaluated with integrated index of organic pollution. [Result] NH3-N and TN of Wei River exceeded the standard＇s lim- its; [ Y~ [ 〉Wp=0.506, [ Yss~ [ 〉Wp=0.506 and [ Y＆=0~,, Diecqieo 〉Wp=0.506 indicated that the integrated index of organic pollution of Shawangdu section, S.huyuan section and Tongguan Diaoqiao section showed a significant downtrend, respetively; and the water quality of the three sections became better, and it was worth noting that it was necessary to strengthen the water quality control of Wei River from January to June, so as to ensure that the water quality of Wei River reached the standard all the time. [Cendasien] This research was of significance in improving water ecological environment in Weinan as well as rationally utilizing water resources and finally realizing permanent development. Key words Wei River; Water quality variation trend; Integrated index of organic pollution; Evaluation

Effect of Sex Steroid Hormones on Brain Tubulin Synthesis in Castrated Male Mouse & Testis-intact Male Mouse

The effect of gonadal hormones on brain tubulin synthesis has been studied in the castrated middle-aged male mouse and testes intact oldaged male mouse.Estrogen exerts potent influences on stimulating tubulin synthesis.Treatment with estradiol benzoate or estradiol benzoate and hydroxyprogesterone caproate increase the amount of tubulin by almost 37%-43%.Administration of testosterone propionate can produce a 13%-23% increase.Both estrogen and androgen can stimulate tubulin synthesis after the critical period of brain development but, estrogen plays a stronger role than androgen in stimulating tubulin synthesis in male mouse.

Analysis of the Evolutionary Significance of Heterosis——taking the contribution of fitness to the genetic diversity in random mating population as an example

Upon the analogy of definition of heterosis and inbreeding depresstion in terms of population genetics, the heterosis is thought to be evaluated overall with fitness. By establishing a mathematical model, the equilibrium status of three genotypes of random mating population （i. e. RR, Rr and rr） under different fitness, which exposes that heterosis is the precondition for multiallele to exist in the population. The heterosis protects the genetic diversity and makes the population owning a stronger self-control and evolution potential by improving the hetemzygote＇s fithess so as not to wash out different types of genes. It deepens Darwin＇s thoughts of individual section by making the individual fitness consonant with population fitness.

Three-dimensional Potential Energy Surface and Bound States of the Ar2-Ne Complex

The first three-dimensional interaction potential energy surface （PES） of the Ar2-Ne complex is developed using the single and double excitation coupled cluster theory with noniterative treatment of triple excitations CCSD（T）. The aug-cc-pVQZ basis sets are employed for all atoms, including an additional （3s3p2d2flg） set of midpoint bond functions. The calculated single point energies are fitted to an analytic two-dimensional potential model at each of seven fixed rAr~ values. The seven model potentials are then used to construct the three- dimensional PES by interpolating along （r-re） using a sixth-order polynomial. The PES is used in the following rovibrational energy levels calculations. The comparisons of theoretical transition frequencies and spectroscopic constants with the experimental results are given.

Urban Big Data and the Development of City Intelligence

This study provides a definition for urban big data while exploring its features and applications of Chi- na＇s city intelligence. The differences between city intelligence in China and the ＂smart city＂ concept in other countries are compared to highlight and contrast the unique definition and model for China＇s city intelligence in this paper. Furthermore, this paper examines the role of urban big data in city intel- ligence by showing that it not only serves as the cornerstone of this trend as it also plays a core role in the diffusion of city intelligence technology and serves as an inexhaustible resource for the sustained development of city intelligence. This study also points out the challenges of shaping and developing of China＇s urban big data. Considering the supporting and core role that urban big data plays in city intel- ligence, the study then expounds on the key points of urban big data, including infrastructure support, urban governance, public services, and economic and industrial development. Finally, this study points out that the utility of city intelligence as an ideal policy tool for advancing the goals of China＇s urban de- velopment. In conclusion, it is imperative that China make full use of its unique advantages-including using the nation＇s current state of development and resources, geographical advantages, and good hu- man relations-in subjective and objective conditions to promote the development of city intelligence through the proper application of urban big data.