A New Species of the Genus Trimeresurus from Southwest China(Squamata:Viperidae)

Species from the Trimeresurus popeiorum complex(Subgenus: Popeia) is a very complex group. T. popeiorum is the only Popeia species known from China. During the past two years, five adult Popeia specimens(4 males, 1 female) were collected from Yingjiang County, Southern Yunnan, China. Molecular, morphological and ecological data show distinct differences from known species, herein we describe these specimens as a new species Trimeresurus yingjiangensis sp. nov Chen, Ding, Shi and Zhang, 2018. Morphologically, the new species distinct from other Popeia species by a combination of following characters:(1) dorsal body olive drab,without cross bands on the scales;(2) a conspicuous bicolor ventrolateral stripe present on each side of males, first row of dorsal scales firebrick with a white ellipse dot on posterior upper part in male, these strips absent in females;(3) eyes firebrick in both gender;(4) suboculars separated from 3rd upper labial by one scale on each side;(5) ventrals 164–168(n = 5);(6) MSR 21.

A New Species of the Genus Rhabdophis Fitzinger,1843(Squamata:Colubridae)in Southwestern Sichuan,China

The genus Rhabdophis is a group of widely distributed snakes with more than 20 species.Recent field surveys uncovered a species in southwestern China,which has long been considered as R.pentasupralabialis.Combined molecular and morphological analyses revealed it as a new species Rhabdophis chiwen sp.nov.Based on 12 specimens,this new species is distinguished by the following characters:1)dorsal body saddlebrown,dorsal scales typically with black margins forming spots and stripes,the margin of the outer row forming two faint dorsolateral black cross-bars alongside body;2)ventral scales 151–159,the outer margin of ventral scales and several lateral rows of dorsal scales forming ventrolateral longitudinal brownish-red coloration,with faint black spots in the middle of ventral scales;3)a black oblique stripe present below eyes,often with a black spot between the 2 nd and 3 rd supralabial and a black stripe on the 5 th supralabial;4)eyes dark khaki,pupils black;5)infralabials usually 7,the first four in contact with anterior chin-shields;6)temporal scales 1+1;7)dorsal scales in 15 rows,feebly keeled except the outer 1–2 rows;8)anal scale divided;subcaudals 45–59;9)preocular 1 and postoculars 3(occasionally 2);10)body medium-sized(snout-vent length:adult males 404–431 mm,adult females 409–476 mm);11)tail moderate(tail length/total length in adult males 0.205–0.238,in adult females0.172–0.193).With the discovery of this new species,the total number of species in genus Rhabdophis is 28 with 12 th species known to occur in China.

A New Species of Trimeresurus Lacépède, 1804(Squamata: Viperidae) from Southwestern China, Vietnam, Thailand and Myanmar

The pit vipers of the genus Trimeresurus Lacépède, 1804 is one of the largest groups of Asian snakes, distributed from India to China and Indonesia. Recent surveys in Jiangcheng and Simao, Yunnan Province, China resulted in a new species previously allocated to T. albolabris. Combining morphological and molecular data, we describe it as Trimeresurus guoi sp. nov. The new species morphologically differs from T. albolabris in the yellow green ventral color;an indistinct ventrolateral line;the a bsence of a postocular stripe;the firebrickred iris;a dark red stripe on dorsal tail;hemipenes with relatively weak sparse papillae, reaching 23 rd subcaudal when unextruded. Molecularly, the new species forms a clearly divergent lineage(BPP 1.00/UFB 100). Uncorrected pairwise distances of mitochondrial gene Cyt b between the new species and other known species of the subgenus Trimeresurus range from 0.052(T. albolabris) to 0.071(T. insularis).

Construction of Regional Economic Vitality Model

Regional economic vitality reflects the scale and development potential of a region’s economy.It largely determines the development of the city,and is also affected by many factors such as population competitiveness,corporate competitiveness,market vitality,innovation vitality,and environmental vitality.A pilot model was constructed with Hebei Province as the inspection area.Quantitative measurement of regional economic vitality was made by finding 21 indicators that indirectly or indirectly affect the economic vitality of Hebei Province.By analyzing the data of 21 indicators for nearly 10 years,the time series clustering is used to achieve the dimensionality reduction of the indicators.After the dimension reduction,it is divided into four categories:overall scale,development potential,market vitality,and innovation vitality.Construct the economic vitality structure model of Hebei Province,and determine the four types of contribution to economic vitality and compare them.On this basis,more accurately grasp the indicators that affect economic vitality and work out reasonable and effective action plans.From the perspective of human resources and corporate vitality,analyze how the action plan accurately affects the economic vitality of Hebei Province[1].The 11 cities in Hebei Province are the target of regional economic vitality.The economic vitality structure model constructed uses the required contribution value to select priority indicators.Finally,the six indicators of GPD,GPD growth rate,fiscal revenue,fiscal revenue growth rate,number of industrial enterprises above designated size,and total profit of industrial enterprises above designated size were established for eleven cities in Hebei Province to construct a TOPSIS scoring model,and calculation rankings were conducted through MATLAB.Results The top three cities were Shijiazhuang,Tangshan and Cangzhou.

基于区块链和去中心属性密码的访问控制身份方案

区块链上的身份体制是不健全的.如何在区块链上认证某个用户的身份、如何确保身份的背书机构是真实的一直是一个挑战.运行在区块链上的分布式公钥基础设施可以在某种程度上解决上述问题,但是属性密码结合区块链可以提供更贴近于真实社会的身份模型.提出一种基于区块链和去中心属性密码的访问控制身份方案,利用用户和组织之间相互授权、背书身份属性实现信任成本的链接,利用属性密码对链上数据进行访问控制和共享达到细粒度的访问控制和隐私保护.设计了可多用户协同的属性密码,为身份模型中的机构提供背书能力.通过实验仿真和对比分析,该方案在安全性和性能上都满足当前通用区块链的需求,为其提供了一种通用基础的身份模型.