Influences of frequency on nitrogen fixation of dielectric barrier discharge in air

The influences of frequency on nitrogen fixation of dielectric barrier discharge in air were studied by electrical diagnostics, gas detection and infrared detection methods. The system power, nitrogen oxide concentration, voltage-current waveform, dielectric surface temperature distribution and filamentous discharge pictures were measured, and then the energy yield was calculated; paper studied their changing tendencies in the presence of frequency. Results show that frequency has strong influences on nitrogen fixation. When the parameters of reaction chamber and amplitude of applied voltage is fixed, with the increasing of frequency, the system power increases; in 5-10 kHz, nitrogen oxide gas concentration up to 1113.7 mg m-3, and 7 kHz is the optimal nitrogen fixation frequency whose energy yield is 20.5 mR （m3 W）-1.

Estimates of genomic inbreeding and identification of candidate regions that differ between Chinese indigenous sheep breeds

Background:A run of homozygosity(ROH)is a consecutive tract of homozygous genotypes in an individual that indicates it has inherited the same ancestral haplotype from both parents.Genomic inbreeding can be quantified based on ROH.Genomic regions enriched with ROH may be indicative of selection sweeps and are known as ROH islands.We carried out ROH analyses in five Chinese indigenous sheep breeds;Altay sheep(n=50 individuals),Large-tailed Han sheep(n=50),Hulun Buir sheep(n=150),Short-tailed grassland sheep(n=150),and Tibetan sheep(n=50),using genotypes from an Ovine Infinium HD SNP BeadChip.Results:A total of 18,288 ROH were identified.The average number of ROH per individual across the five sheep breeds ranged from 39(Hulun Buir sheep)to 78(Large-tailed Han sheep)and the average length of ROH ranged from 0.929 Mb(Hulun Buir sheep)to 2.544 Mb(Large-tailed Han sheep).The effective population size(Ne)of Altay sheep,Large-tailed Han sheep,Hulun Buir sheep,Short-tailed grassland sheep and Tibetan sheep were estimated to be 81,78,253,238 and 70 five generations ago.The highest ROH-based inbreeding estimate(FROH)was 0.0808 in Large-tailed Han sheep,whereas the lowest F_(ROH)was 0.0148 in Hulun Buir sheep.Furthermore,the highest proportion of long ROH fragments(>5 Mb)was observed in the Large-tailed Han sheep breed which indicated recent inbreeding.In total,49 ROH islands(the top 0.1% of the SNPs most commonly observed in ROH)were identified in the five sheep breeds.Three ROH islands were common to all the five sheep breeds,and were located on OAR2:12.2-12.3 Mb,OAR12:78.4-79.1 Mb and OAR13:53.0-53.6 Mb.Three breed-specific ROH islands were observed in Altay sheep(OAR15:3.4-3.8 Mb),Large-tailed Han sheep(ORA17:53.5-53.8 Mb)and Tibetan sheep(ORA5:19.8-20.2 Mb).Collectively,the ROH islands harbored 78 unique genes,including 19 genes that have been documented as having associations with tail types,adaptation,growth,body size,reproduction or immune response.Conclusion:Different ROH patterns were observed in five Chinese indigenous sheep breeds,which reflected their different population histories.Large-tailed Han sheep had the highest genomic inbreeding coefficients and the highest proportion of long ROH fragments indicating recent inbreeding.Candidate genes in ROH islands could be used to illustrate the genetic characteristics of these five sheep breeds.Our findings contribute to the understanding of genetic diversity and population demography,and help design and implement breeding and conservation strategies for Chinese sheep.

Observation of Religion and Drug Aspects in Ginsberg Literature:Focusing On Howl and Kaddish

As an important figure of the Beat Generation,the literature works of Allen Ginsberg have a huge influence on contemporary literature.Ever since the sensational publishing of Howl in the mid-1950s,the poetry of Ginsberg has been recognized for the language use which expresses violence,lusts,taboos;as well as the combination of large numbers of imaginaries that seem unrelated.In Ginsberg’s works,the components of religions and drugs are considered as large and important parts and help to express the theme or emotions of the poems.The interpretation of those elements is related to Ginsberg’s personal memory and emotions,hence,in many of his works,Ginsberg had different attitudes towards them,and used them as different methods of expression.

Preparation of cannabidiol and its application in daily chemical industry

Cannabidiol(CBD)is a physiologically active natural substance,usually extracted from the flowers and leaves of hemp.CBD not only has the function of alleviating the symptoms of many mental disorders,but also has the function of anti-inflammation,anti-oxidation and treatment of skin diseases.Because of its beneficial effects,CBD has been used as an important raw material in the production of health care products and skin care products,which have already been sold on the market.This paper reviewed the main preparation techniques of CBD.The author developed a new refining process for CBD purification combining molecular distillation and crystallization.This new process is both environmental friendly and economical.The obtained samples meet the requirements of the cosmetic industry.The paper also introduces the application prospect of CBD products in daily Chemical Industry,especially in skin care.

Research on the Design and Education of Serious Network Security Games

Through the correct teaching and game design,not only can innovation be carried out,but the highly effective network security teaching and the training solution countermeasure can also develop the student’s correct social behavior and value idea.Furthermore,through rule design and role play,students can improve the overall level of network security awareness and enhance their sense of cooperation during their studies.This paper defines the concept of a serious game and its significance to the network security curriculum of schools and designs the corresponding card game according to the feature of network security.The purpose of this paper is to strengthen overall network security awareness,cultivate professional skills,and enhance network security.

Research on recognition algorithm for gesture page turning based on wireless sensing

When a human body moves within the coverage range of Wi-Fi signals,the reflected Wi-Fi signals by the various parts of the human body change the propagation path,so analysis of the channel state data can achieve the perception of the human motion.By extracting the Channel State Information(CSI)related to human motion from the Wi-Fi signals and analyzing it with the introduced machine learning classification algorithm,the human motion in the spatial environment can be perceived.On the basis of this theory,this paper proposed an algorithm of human behavior recognition based on CSI wireless sensing to realize deviceless and over-the-air slide turning.This algorithm collects the environmental information containing upward or downward wave in a conference room scene,uses the local outlier factor detection algorithm to segment the actions,and then the time domain features are extracted to train Support Vector Machine(SVM)and eXtreme Gradient Boosting(XGBoost)classification modules.The experimental results show that the average accuracy of the XGBoost module sensing slide flipping can reach 94%,and the SVM module can reach 89%,so the module could be extended to the field of smart classroom and significantly improve speech efficiency.