Table of Content

15 June 2016, Volume 1 Issue 6

Previous Issue    Next Issue

The Structure of the Completely Regular Semigroup in Dn

Zhou Shaoyan

2016, 1(6):  1-3. 

Asbtract ( 207 )   PDF (1323KB) ( 246 )  

References | Related Articles | Metrics

This paper achieves the structure of completely regular semigroup through the investigation of completely regular elements
in doubly-stochastic matrix semigroup Dn. Namely,(CR)n ={PE|P ∈ ∩_{E ∈Bn}G_E，E ∈Bn ⊆E(Dn)} is completely regular semigroup if and only
if Bn is a semi-lattice.

Improvement of Genome Assembly Algorithm Based on MapReduce

He Yuan, Zhang Lina, Zhu Xingwen

2016, 1(6):  4-7. 

Asbtract ( 190 )   PDF (1593KB) ( 335 )  

References | Related Articles | Metrics

The rapid increase of biological information data requires the import of new technology. At present, the genome assembly
algorithm is neither precised nor parallelize. A new algorithm based on MapReduce is proposed after analysis of the current assembly
algorithm. The error data is removed through statistics way, and the duplicate data is eliminated by increasing the length of the k-mer
in the process of assembly. Finally, the parallel assembly algorithm is realized in MapReduce platform. The experimental results show
that the accuracy and speed of this algorithm are improved.

Reflections on the Mathematics Culture of Ethnic Minorities

Yang Zeheng, Wang Pengde, Mao Chongbin, Li Jiamei

2016, 1(6):  8-12. 

Asbtract ( 238 )   PDF (1946KB) ( 403 )  

References | Related Articles | Metrics

This paper expresses some personal thoughts from the following three aspects: the significance of valuing mathematics
culture of ethnic minorities, aspects call for attention in the education on mathematics culture of ethnic minorities, and mathematics in
the culture of Yunnan Bai ethnic group.

Mathematical Culture in Folk Paper-cutting Art

Wang Pei, Wang Pengde

2016, 1(6):  13-18. 

Asbtract ( 261 )   PDF (2587KB) ( 994 )  

References | Related Articles | Metrics

Paper cutting is a traditional Chinese folk art. Through the research and analysis of Chinese folk paper-cut patterns, this
paper aims at excavating mathematical elements of folk paper-cut art including curve geometry, geometry transform and golden section,
exploring the commonality between folk paper-cut art and mathematics culture, protecting and inheriting the folk custom culture,
providing more case teaching for maths class teaching.

A New Model for Color-Magnitude Diagram Study: Advanced Stellar Population Synthesis

Li Zhongmu, Luo Qiping, Li Yudong

2016, 1(6):  19-22. 

Asbtract ( 228 )   PDF (1672KB) ( 416 )  

References | Related Articles | Metrics

This paper mainly introduces the construction, advantages, and the application in color-magnitude diagram studies of
advanced stellar population synthesis model. The new model is more accurate in cluster color-magnitude diagram fitting, and can be
widely used in the studies of galaxies and star clusters. The results can be compared with those of traditional stellar population
synthesis models easily.

Effect of Component Thickness Structure on Layered Phononic Crystal Conduct Band

Tang Qixiang, Qiu Xueyun, Hu Jiaguang

2016, 1(6):  23-26. 

Asbtract ( 174 )   PDF (1544KB) ( 217 )  

References | Related Articles | Metrics

Choosing a central frequency to calculate the central wavelength of every component, and determining every component's
thickness coefficients with ratios of their central wavelength, and defining each component's ratio of thickness coefficient with a certain
component's thickness coefficient, and the transmission characteristics of the three components phononic crystal were calculated with
transfer matrix method for different thickness coefficient and ratio of thickness coefficient. The results show that the distribution of the
conduction band presents very perfect symmetry. With the changing of the thickness coefficient and the thickness coefficient ratio, all
of the frequency center of the conduction band and the conduction band width and the center of the adjacent conduction band
frequency interval present obvious regularity, but there is nothing to do with the changing of the original cell number.

Phase Relation between Terminal Voltage and Current of Pure Inductance Coil

Peng Jianrong, Luo Lingxiao

2016, 1(6):  27-29. 

Asbtract ( 252 )   PDF (1347KB) ( 183 )  

References | Related Articles | Metrics

By means of two approaches, this paper strictly proved the phase relation between current and terminal voltage of pure
inductance coil, and provided the definition of the easy-operation of pure inductance coil.

Fingerprint Image Segmentation Algorithm Based on the Direction of the Field of Information and Gray
Feature Fingerprint Segmentation

Chen Jing, Zhang Su

2016, 1(6):  30-32. 

Asbtract ( 178 )   PDF (1541KB) ( 278 )  

References | Related Articles | Metrics

Fingerprint image segmentation is a key step in the pre-processing, with the purpose of facilitating the effective extraction
of fingerprint image feature. According to the basic principles of the common fingerprint segmentation process, this paper summarizes
two common segmentation algorithms: methods of information-based approach and the statistical properties of the base direction. On
this basis, this paper proposed segmentation algorithm based on orientation field information and gray feature, the results showed that:
this method can efficiently and reliably segment fingerprint image, and the segmentation effect can meet the fingerprint image preprocessing
purposes.

Integral Analysis of the Multilayer Cold-formed Steel Composite Structure under Horizontal Earthquake

Zhao Jing, Fan Jiang

2016, 1(6):  33-37. 

Asbtract ( 174 )   PDF (1831KB) ( 197 )  

References | Related Articles | Metrics

The multiple-story light-weight steel structure of America is introduced and analyzed through the structural arrangement
of the multi-layer cold-formed thin-walled and hot rolled steel composite structure system, establishment of the whole structure model,
the enter the actual load and seismic action, and ETABS analysis software.

Study on Preparation and Photocatalytic Activity of Ag-doped ZnO

Zhang Yanqing, Li Dandan, Yan Ya

2016, 1(6):  38-42. 

Asbtract ( 172 )   PDF (1939KB) ( 295 )  

References | Related Articles | Metrics

Objective: To explore the photocatalytic activity of Ag-doped zinc oxide. Methods: Ag doped ZnO（Ag-ZnO）with
different Ag molar content was prepared by direct precipitation method. XRD, XPS, TEM, UV- Vis DRS, and PL were used to
characterize the products. When Rhodamine B（RhB）was selected as the model contaminant, 1 000 W halogen lamp as light source,
the effects of different amount of Ag-doped on the photocatalytic activities of ZnO were explored. Results: Photocatalytic activity of
ZnO was enhanced when appropriate amount of Ag was doped into ZnO. The optimum amount of doped-Ag are x = 2% and x = 6%.
Ag-ZnO with the optimal Ag-doped amount showed the highest photocatalytic activity, and the active spectral range isλ < 400 nm.
Conclusion: Ag can improve the photocatalytic activity of ZnO, while cannot change the active spectral range of ZnO.

Determination of the Content of Heavy Metal in Periplaneta americana from Different Habitats by Means
of Atomic Fluorescence Spectrophotometry

Zhang Chunmei, Tang Xiaguang, Liu Jia, Yang Yongshou

2016, 1(6):  43-46. 

Asbtract ( 187 )   PDF (1401KB) ( 212 )  

References | Related Articles | Metrics

Objective: To determine the content of heavy metal in Periplaneta americana. Methods: The content of As, Hg, Pb and
Cd in Periplaneta americana from different producing areas were determined by means of atomic fluorescence spectrophotometry.
Results: There was certain difference of heavy metal content in Periplaneta americana from different producing areas, but all heavy
metal content meet the limited quantity standard of heavy metal in the Pharmacopoeia of the People's Republic of China, 2015 Edition.
Conclusion: Atomic fluorescence spectrophotometry can determine the content of heavy metal in Periplaneta americana in a rapid,
simple and accurate way, which also can provide a reference for the quality evaluation of Periplaneta americana as a medicinal
materials.

Determination of the Content of Ellagic Acid and Gallic Acid in Geranium strictipes

Zou Rongdi, Luo Tingting, Su Min, Zhao Feiya, Zhou Ping

2016, 1(6):  47-49. 

Asbtract ( 189 )   PDF (1466KB) ( 291 )  

References | Related Articles | Metrics

Objective: To establish a method of determining the content of ellagic acid and gallic acid in Geranium strictipes.
Methods: HPLC method was used with Thermo C18 chromatography column（250 mm×4.6 mm, 5 μm）. Mobile phase was methanol -
0.1% phosphoric acid water solution gradient elution, the detection wavelength was 260 nm, the flow rate was 1.0 mL/min, and the
column temperature was 30 degree. Results: Ellagic acid in 6.38-31.88 μg/mL range r=0.999 1 and gallic acid in 11-55 μg/mL range
r=0.999 1 showed a good linear relationship. The average recovery rate was 99.2%（RSD=1.9%） and 97.6%（RSD=1.5%）.
Conclusion: This method is simple, rapid, accurate and good in reproducibility, which can effectively determine the content of ellagic
acid and gallic acid in Geranium strictipes.

Spatial Differences and Impact Factors on Protection Awareness of Local Residents in Baimaxueshan

Wang Junwei , Zhang Lili, Li Xinhong, Ma Chi, Li Tingye, Li Yanpeng, Liu Zehua,D

2016, 1(6):  50-56. 

Asbtract ( 203 )   PDF (1797KB) ( 254 )  

References | Related Articles | Metrics

Interview survey on protection awareness of local residents was conducted during September 2014 to October 2015 in
Baimaxueshan. 1 192 people from 60 villages were interviewed and 1 139 valid data was obtained. Statistical analysis showed that
there are elevation differences on conservation knowledge value of locals（CKVL）, and distribution of conservation stations and
distance to nature reserve may also contributed on CKVL difference. Moreover, there are age and sex difference on CKVL, older people
and males have higher CKVL than others. Result from this study suggested that nature reserve and its conservation stations do have
active impact by conservation education; however, conservation education should avoid the pattern of simple broadcasting, a good plan
should cover area and population well and prepare proper content for targeting population.

Investigation on the Distribution of Pomacea canaliculata in Erhai Lake Basin

Su Xijun, Li Yanpeng, Li Jiangli, Gao Ying, Xiao Wen, Yang Yimei

2016, 1(6):  57-61. 

Asbtract ( 278 )   PDF (1509KB) ( 323 )  

References | Related Articles | Metrics

Through the investigation on the distribution of Pomacea canaliculata in the Erhai Lake basin, including the water area in
each village and town, main inflow and outflow rivers, it showed that Pomacea canaliculata was widely distributed in the Erhai Lake
basin, mainly in Yong'an River, Luoshi River and the west coast of the Erhai Lake, Xihu and Donghu wetland, Luoshi wetland, Xizhou
Town, Yinqiao Town and Xiaguan Town; while there was no Pomacea canaliculata in Miju River, Mici River, Boluo River, Fengyu
River and Xi'er River. According to the related references and date analysis, downstream diffusion was the main disfussion way of
Pomacea canaliculata, and human activity had a great influence on it. The main concentrated diffusion area of Pomacea canaliculata
was the buffer area of wetlands and lakesides, Dengchuan Town, Shangguan Town, Wanqiao Town, Dali Town and Haidong Town were
the high risk diffusion areas of Pomacea canaliculata.

Comparative Study of Freshwater Hyphomycetes Resource in Heilong Stream during the Rainy Season
and Dry Season in Cangshan Mountain at Dali

Wang Ruxiao, Liu Xiaoying, Luo Zonglong, Li Zhuo, Wang Liwei, Su Hongyan

2016, 1(6):  62-65. 

Asbtract ( 185 )   PDF (1315KB) ( 274 )  

References | Related Articles | Metrics

Objective: To investigate the diversity of freshwater hyphomycetes from Heilong Stream and compare their differences in
occurrence during the dry season and rainy season. Methods: 50 samples were collected from each season, moist chamber incubation
methodwasusedtoincubatethefungiandthefunguswereidentifiedbasedonthemorphologicalcharacters. Results: Atotalof48speciesof
freshwater hyphomycetes were identified: 30 species from dry season, 23 species from wet season. Ellisembia bambusicola, Helicosporium
guianense,Helminthosporium velutinum,Phaeoisaria clematidis,Rhinocladiella schulzerii werefoundduringboththeseasons.Thediversity
index of freshwater fungi at dry season is higher than wet season（3.67 vs 2.32）. Conclusion: The diversity of freshwater hyphomycetes in
HeilongStreamcloselyrelatedtotheseasonchangingandmorespeciesdiversitywasobservedduringdryseason.

Observations on the Life Cycle and Biological Characteristic of Caryanda macrocercusa

Du Yanlin, Nie Qiuyue, Li Miao, Mao Benyong

2016, 1(6):  66-68. 

Asbtract ( 211 )   PDF (1403KB) ( 189 )  

References | Related Articles | Metrics

Life cycle and biological characteristics of Caryanda macrocercusa（Mao et Ren, 2007）were investigated during 3 years'
indoor feed. Experimental results showed that the species kept one generation per year under indoor conditions in Dali, Yunnan
Province; the duration of hibernating egg laid in the soil was about 235 days averagely; the egg hatched in early-April next year; the
nymph stadiums consisted of 5 instars and lasted for 63 days; the 5th instar emerged in early-June; mating started on the 10th day after
eclosion and spawned 8-12 eggs on the 10th-30th day after mating with the duration of adult life being about 43 days and dying from
mid-June to early-August individually. Caryanda macrocercusa appears to feed on some grass Arthraxon hispidus and Oplismenus
compositus etc. The species with a sample life cycle and clear biological characteristics in principle can be used as a material in
hybridization experiment and bred as an ornamental insect.

Foraging Behavior of Squirrels on Walnut Trees and Damage to Walnuts in Baihualing, Gaoligong
Mountain

Chen Guishou, Cui Liangwei， Fan Pengfei

2016, 1(6):  69-74. 

Asbtract ( 287 )   PDF (1567KB) ( 233 )  

References | Related Articles | Metrics

In order to understand the foraging behavior of squirrels on walnut trees and walnuts damaged caused by squirrels, this
paper collected foraging data using all-occurrence method and interviewed 200 walnut farmers to estimate walnut damages after walnut
harvesting. The results showed that, three species of squirrel（Dremomys rufigenis, Ratufa bicolor and Callosciurus erythraeus）fed on
and damaged the walnuts. Among them, C. erythraeus caused the most server damage. In order to keep walnut away from damage,
farmers chose to kill squirrels in the study site. Consequently, squirrels showed anti-predation behavior during foraging on walnut
trees. A significant positive relation was found between feeding time length and feeding height. The squirrels damaged 12.20% walnuts
in the study site. The damage rates of 51 walnut trees were negatively correlated with the distance between the walnut tree and the
boundary of the natural forests. Based on our interviews, it is estimated that squirrels caused RMB 100 000 losses in 150 hm2 walnut
farms. In order to reduce economical loss, this paper suggested that farmers should strengthen management rather than expanding the
planted area blind, and then take more scientific and effective protective actions based on the feeding behavior of squirrels.

Investigation of the Genus Amanita in Cangshan Mountain National Nature Reserve

Gong Bin, Luo Zonglong, Tang Songming, Rao Canhe, Su Hongyan

2016, 1(6):  75-77. 

Asbtract ( 187 )   PDF (1315KB) ( 364 )  

References | Related Articles | Metrics

Objective: To investigate the resources of Amanita from Cangshan National Nature Reserve. Methods: Random survey
was conducted to investigate and identify the species of Amanita in Cangshan Mountain based on the morphology characters. Results:
Nearly 200 samples were collected in Cangshan Mountain from 2008 to 2015 with 34 species of Amanita genus were identified.
Conclusion: The resources of Amanita are abundant in Cangshan National Nature Reserve. Among the Amanita species in this area, A.
hemibapha is tasted delicious, A. muscaria and A. excelsa are hypertoxic.

One New Chinese Records of Protubera Möller

Li Lin, Tang Songming, Luo Zonglong, Su Hongyan

2016, 1(6):  78-80. 

Asbtract ( 187 )   PDF (1506KB) ( 307 )  

References | Related Articles | Metrics

During investigation and identification of fungi from Cangshan National Nature Reserve in Dali, Yunnan Province, one new
Chinese records of Protubera were found. It is Protubera sabulonensis Malloch. In this paper, morphological characters, illustrations and
discussion of the species are provided and the specimens were preserved at Biological Science Museum of Dali University（BMDLU）.

Investigation and Research on South Asia, Southeast Asia International Students Extracurricular Sports
Activities Status

Wang Shichao

2016, 1(6):  81-85. 

Asbtract ( 147 )   PDF (1454KB) ( 208 )  

References | Related Articles | Metrics

In this paper, questionnaires, mathematical statistics and other research methods were conducted to investigate South Asia,
Southeast Asia, students participation in extracurricular sports activities and provide help and guidance for them. The study found that
the group overall participation in extracurricular sports activities is rather active, and the main factors of intervention are: lack of time,
no habit of exercising, too much homework, lack of organization and management, lack of venues and equipment, no skills, no interest
in sports, etc.

Challenges and Countermeasures Faced by the First-line Teachers of Frontier Colleges and Universities in
the MOOC Era

Su Youbang, Lan Xiaoli, Qiu Chengxiang

2016, 1(6):  86-90. 

Asbtract ( 167 )   PDF (1296KB) ( 156 )  

References | Related Articles | Metrics

MOOC teaching is the focus of the teaching reform in universities now, but a variety of reasons lead to serious lag for
MOOC teaching in frontier colleges and universities. In order to help teachers adapt to MOOC teaching as soon as possible, this paper
proposes the strategies and methods based on the analysis of difficulties and challenges faced by teachers in frontier colleges and
universities, and applies them to the construction and teaching of Education course online in Puer University. It has been proved that
these strategies and methods are effective.

Exploration of the Job Demand-Oriented "Horticultural Plant Cultivation" Teaching Reform

Zhou Nong, Li Li, Ding Bo, Chen Rong

2016, 1(6):  91-92. 

Asbtract ( 215 )   PDF (1382KB) ( 152 )  

References | Related Articles | Metrics

Aiming at the requirement of profession, this paper explores the reform teaching content and mode of horticultural plants
cultivation for cultivating students' creative ability and practical ability, achieving the teaching objectives from the "general technical
objective" to "post employment objectives".