A partial robust optimization approach to inventory management for the offline-to-online problem under different selling prices

This study examines an optimal inventory strategy when a retailer markets a product at different selling prices through a dual-channel supply chain, comprising an online channel and an offline channel. Using the operating pattern of the offline-to-online (O2O) business model, we develop a partial robust optimization (PRO) model. Then, we provide a closed-form solution when only the mean and standard deviation of the online channel demand distribution is known and the offline channel demand follows a uniform distribution (partial robust). Specifically, owing to the good structural properties of the solution, we obtain a heuristic ordering formula for the general distribution case (i.e., the offline channel demand follows a general distribution). In addition, a series of numerical experiments prove the rationality of our conjecture. Moreover, after comparing our solution with other possible policies, we conclude that the PRO approach improves the performance of incorporating the internet into an existing supply chain and, thus, is able to adjust the level of conservativeness of the solution. Finally, in a degenerated situation, we compare our PRO approach with a combination of information approach. The results show that the PRO approach has more “robust” performance. As a result, a reasonable trade-off between robustness and performance is achieved.     

含区间参数的战场资源动态调度模型及算法

战场资源调度是作战指挥领域研究的热点.首先描述了战场资源调度问题,分析了战场资源动态调度需求,在此基础上建立了包含区间参数的战场资源动态调度模型.然后设计了三种不同的贪心策略,分别为基本贪心策略、双重贪心策略和一致贪心策略,提出了模型求解的混合贪心算法.最后结合联合作战算例进行了仿真验证,结果表明本文方法可行优越,能应用于不确定性的战场环境中.     

Earlier and broader roles of Mesp1 in cardiovascular development

Mesoderm posterior 1 is one of earliest markers of the nascent mesoderm. Its best-known function is driving the onset of the cardiovascular system. In the past decade, new evidence supports that Mesp1 acts earlier with greater breadth in cell fate decisions, and through cell-autonomous and cell non-autonomous mechanisms. This review summarizes these new aspects, with an emphasis on the upstream and downstream regulation around Mesp1 and how they may guide cell fate reprogramming.     

时间成本视角下RCEP对中国的经济影响——基于GTAP模型的测算

作为潜在的最大自由贸易区以及中国应对TPP(trans-pacific partnership)的一项重要策略,RCEP(regional comprehensive economic partnership)谈判的迅速推进使其成为国际社会的热点议题,然而目前却鲜有研究在量化贸易便利性的情况下测算RCEP对中国的经济影响.本文利用改进的GTAP(global trade analysis project)模型,以时间成本量化贸易便利性,分别模拟了RCEP成员之间"关税削减"情景和"关税削减+时间成本削减"情景.发现关税削减只能使中国的GDP增长0.14%.然而,如果将时间成本的削减也纳入考虑,在"冰山效应"的拉动下,中国的GDP将增长1.41%,达到关税削减情景的10倍之多.此外,中国的消费、贸易及大部分行业的生产也都会因此受益.这说明贸易时间的减少将会给中国带来巨大经济效益,也说明忽视时间成本的定量研究严重地低估了贸易自由化潜在的正面影响.     

Nine new species of the subgenus Stegana (Oxyphortica) from the Oriental region,with morphological and molecular evidence based on Chinese species (Diptera: Drosophilidae)

Nine new species of the subgenus Stegana (Oxyphortica) have been discovered from the Oriental Region: S. (O.) chuanjiangi Zhang and Chen, sp. nov., S (O.) dainuo Wang and Chen, sp. nov., S. (O.) dawa Zhang and Chen, sp. nov., S. (O.) laohlie Zhang and Chen, sp. nov., S. (O.) luchun Wang and Chen, sp. nov., S. (O.) mengwan Wang and Chen, sp. nov., S. (O.) triodonta Cheng and Chen, sp. nov. from southern China; S. (O.) dehiscens Cheng and Chen, sp. nov. and S. (O.) spinosa Cheng and Chen, sp. nov. from eastern Malaysia. One newly recorded species from China: S. (O.) maichouensis Sidorenko is re-described. The DNA sequences of the mitochondrial COI gene with BOLD Process ID and GenBank accession numbers are provided for the above seven new species and five known species from China: S. (O.) acutipenis Xu, Gao and Chen, S. (O.) adentata Toda and Peng, S. (O.) hirtipenis Xu, Gao and Chen, S. (O.) latipenis Xu, Gao and Chen, and S. (O.) maichouensis Sidorenko. Intra- and interspecific pairwise K-2P distances among these species are summarized and the phylogenetic relationships are reconstructed based on the neighbour-joining (NJ) analyses.

www.zoobank.org/urn:lsid:zoobank.org:pub:2FA403F6-5535-40A4-9FD0-ADB9913EDE83.     

1961-2014年西安市秋淋气候特征分析

利用1961-2014年8-10月西安市7个气象站逐日降水资料,采用降水强度指数分析了西安市秋淋天气气候变化特征.结果表明,20世纪90年代是近50年来西安市秋季9~10月降水量最少的阶段.1961年以来西安市共有23 a出现秋淋多雨时段,20世纪60年代至80年代中期较多,1983年和1984年出现强秋淋;20世纪80年代中期至21世纪10年代初期,只有1992年出现了1次秋淋天气;2011年以来,秋淋呈明显上升、增强趋势.1961-2014年秋淋天气过程平均降水量呈上升趋势,偏多年份主要出现在20世纪80年代初中期和21世纪.厄尔尼诺使秋季9~10月降水量减少,与秋淋天气存在明显的负相关关系.近54年西安市秋淋没有发生显著的气候突变,存在4~6 a、10 a和24 a左右的长振荡周期.     

全长人PPAR-γ的表达、纯化与结构确证

目的建立表达、纯化结构完整的全长人PPAR-γ的方法。方法构建pReceiver-B01-PPAR-γ质粒并转化E．coliBL21（DE3）细胞,诱导表达重组蛋白,优化细胞生长条件;利用亲和色谱和尺寸排阻色谱纯化重组蛋白;胶内酶解重组蛋白,用离子阱质谱仪分析二维AgilentHPLC-Chip纯化的酶解片段;基于MS／MS搜索IPI、Swiss．Prot、NCBInr和MSDB数据库,鉴定重组蛋白。结果在优化的细胞生长条件（TB介质、37℃、0．8mMIPTG、诱导3h）,从每升TB中可获得280mg重组蛋白;两步纯化后,获得176mg、纯度为95％的均质重组PPAR-γ蛋白;经质谱分析和搜索蛋白质数据库,获得均匀地分布在整个PPAR-γ多肽链中的33个阳性肽段,覆盖率为60％,表明重组蛋白为结构完整的全长人PPAR-γ。配体结合活性位点S289、H323、H449和Y473无突变,保证全长人PPAR-γ与配体结合的生物学活性。结论本文所建立的方法能成功用于大量表达结构完整的全长人PPAR-γ,有利于进一步的结构、功能研究和活性配体的筛选。     

基于能力分析的空间对抗装备体系效能评估方法

首先研究了空间对抗的核心能力要素;然后研究了空间对抗装备体系的构成,即将核心能力要素细化为基本能力要素并映射到空间对抗装备子系统;最后构建由作战能力指标→核心能力指标及权重赋值→基本能力指标及权重赋值→单项效能指标及权重赋值组成的指标体系,并提出基于该指标体系的单项效能评价→系统综合评价→体系综合评价→作战效能评价→结果验证的综合评估途径.     

Two new nematodes,Pseudelzalia longiseta gen. nov., sp. nov. and Paramonohystera sinica sp. nov. (Monhysterida: Xyalidae), from sediment in the East China Sea

Pseudelzalia longiseta gen. nov, sp. nov. and Paramonohystera sinica sp. nov. from subtidal sediment in the East China Sea are described. Pseudelzalia is characterized by 6 labial papillae and 10 cephalic setae, cylindrical buccal cavity, elongate (>2 anal body diameter) spicules, and conico-cylindrical tail devoid of terminal setae. It differs from Elzalia by the absence of terminal setae. Pseudelzalia longiseta sp. nov. is 647–853 μm long, has 7–8 μm long cervical setae, 11–14 μm long caudal setae, 25–41 μm long spicules about 2.1–2.7 anal diameter, and pointed tail-tip. Paramonohystera sinica possesses 12 cephalic setae, a character found in four congeners: Paramonohystera buetschlii (Bresslau and Schuurmans Stekhoven in Schuurmans Stekhoven, 1935, Paramonohystera pilosa Boucher, 1971, Paramonohystera concinna Lorenzen, 1977 and Paramonohystera halerba Fadeeva and Belogurov, 1987. It differs from P. buetschlii by shorter body (933–1023 μm versus 2000–2200 μm); from P. pilosa by the much shorter spicules (79–88 μm versus 167 μm) and narrower head (13–16 µm versus 32 µm); from P.concinna by smooth cephalic setae (versus segmented); and from P. halerba by the absence of two rows of setae on the ventral side of the tail (versus present). Based on the evaluation of nominal species, we recognize 14 valid species and provide an emended diagnosis and a tabular key for Paramonohystera.

http://www.zoobank.org/urn:lsid:zoobank.org:pub:474B8F17-AED7-4078-8176-DFC499B78526