检索结果-南通市图书馆

Impacts of Platform’s Omnichannel Coupons on Multichannel Suppliers

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2023年第1期32卷 71-99页

作者： Yue Zhang Xiaojian Hu ju Zhao ju qiu School of Management Hefei University of TechnologyHefei230009China Key Laboratory of Process Optimization and Intelligent Decision-Making Ministry of EducationHefei230009China

While coupons that can be redeemed only in online channels have been issued by e-commerce platforms for decades, a new type of platform’s coupons, i.e., omnichannel coupons, which can be redeemed in both online and store channels, is gaining popularity with the rise of the omnichannel retail mode. It is interesting to explore the conditions under which omnichannel coupons are more advantageous to platforms and multichannel suppliers that sell products through platforms and physical stores. Two game models are developed in two cases where an e-commerce platform offers single channel coupons or omnichannel coupons for a multichannel supplier. Two scenarios are considered: one in which a consumer’s valuation of a product that fits his or her need is homogeneous and another in which the valuation is heterogeneous. Equilibrium outcomes show that under the homogeneous scenario, the product price and coupon face value in both coupon modes increase with the product’s fit probability when the cross-selling revenue is high, while decrease with the product’s fit probability when the cross-selling revenue is low. However, under the heterogeneous scenario, the price in both modes increases with the product’s fit probability only when the supplier’s loss from returns is low and the cross-selling revenue is high, and the coupon face value always decreases with the product’s fit probability. Compared with single channel coupons, omnichannel coupons may lead to a higher product price under certain conditions. Furthermore, omnichannel coupons can lead to higher total demand and benefit both the platform and the supplier if and only if the product’s fit probability is low and the supplier’s loss from returns is high. An extension shows that the platform’s preference for omnichannel coupons is weakened when the supplier offers a partial refund policy.

关键词： Omnichannel coupon promotion e-commerce platform game theory

System level test selection based on combinatorial dependency matrix

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2021年第4期32卷 984-994页

作者： YANG Peng xie Haoyu qiu Jing Science and Technology on Integrated Logistics Support Laboratory School of Intelligence ScienceNational University of Defense TechnologyChangsha 410073China Unit 91697 of the PLA Qingdao 266000China

Test selection is to select the test set with the least total cost or the least total number from the alternative test set on the premise of meeting the required testability *** existing models and methods are not suitable for system level test *** first problem is the lack of detailed data of the units’fault set and the test set,which makes it impossible to establish a traditional dependency matrix for the system *** second problem is that the system level fault detection rate and the fault isolation rate(referred to as"two rates")are not enough to describe the fault diagnostic ability of the system level *** innovative dependency matrix(called combinatorial dependency matrix)composed of three submatrices is *** first problem is solved by simplifying the submatrix between the units’fault and the test,and the second problem is solved by establishing the system level fault detection rate,the fault isolation rate and the integrated fault detection rate(referred to as"three rates")based on the new *** mathematical model of the system level test selection problem is constructed,and the binary genetic algorithm is applied to solve the problem,which achieves the goal of system level test selection.

关键词： test selection dependency matrix fault detection rate testability prediction binary genetic algorithm

Unique chemical properties of metal-carbon bonds in metal-carboranyl and metal-carboryne complexes

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2009年第10期52卷 1544-1558页

作者： qiu ZaoZao xie ZuoWei Department of Chemistry The Chinese University of Hong KongHong KongChina

The metal-carbon bonds in metal-carboranyl and metal-carboryne complexes behave very differently from those in classical organometallic complexes. The unique electronic and steric properties of ico-sahedral carboranyl moiety make the M-C bond in metal-carboranyl complexes inert toward unsaturated molecules, and on the other hand, the sterically demanding carborane cage can induce unexpected C-C coupling reactions. The M-C bonds in metal-carboryne complexes are, however, active toward various kinds of unsaturated molecules and the reactivity patterns are dependent upon the electronic configurations of the metal ions. This account provides an overview of our recent work in this area.

关键词： boron cluster carborane carboryne insertion metal-carbon bond

Role of the Λ(1600) in the K^-p→Λπ^0π^0 reaction

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2020年第4期72卷 64-70页

作者： He Zhou ju-jun xie Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBejing 101408China School of Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China

Role of theΛ(1600)is studied in the K^-p→Λπ^0π^0 reaction by using the effective Lagrangian approach near the *** perform a calculation for the total and differential cross sections by considering the contributions from theΛ(1600)andΛ(1670)intermediate resonances decaying intoπ^0∑^*0(1385)with∑^*0(1385)decaying intoπ^0Λ.Additionally,the non-resonance process from u-channel nucleon pole is also taken into *** our model parameters,the current experimental data on the total cross sections of the K^-p→Λπ^0π^0 reaction can be well *** is shown that we really need the contribution from the A(1600)with spin-parity J^P=1/2^+,and that these measurements can be used to determine some of the properties of theΛ(1600)***,we also plot theπ0Λinvariant mass distributions which could be tested by the future experimental measurements.

关键词： KN scattering effective Lagrangian approach hyperon resonance

Semiclassical Calculations of Recurrence Spectra for Lithium Atoms in Parallel Electric and Magnetic Fields

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2002年第1期19卷 29-31页

作者： Lin Sheng-Lu, Zhang qiu-ju Department of Physics Shandong Normal University Ji\'nan 250014

By using the region-splitting consistent and iterative method, we calculate the recurrence spectra of lithium atoms in parallel strong external electric and magnetic fields, and obtain the novel resonance structure in the photoabsorption spectrum above the ionization threshold with a constant scaled electric field at (F↑-)= 0.036, and a scaled energy at ε= 0.58 and ε= 0.006, respectively. The results are compared with those of hydrogen obtained by using standard closed orbit theory. It is demonstrated that the core-scattered effects exhibited in combination recurrence play a great role

关键词： Electric fields

Integrated water risk early warning framework of the semi-arid transitional zone based on the water environmental carrying capacity (WECC)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Arid Land 2023年第2期15卷 145-163页

作者： xie Yuxi ZENG Weihua qiu Jie School of Environment Beijing Normal UniversityBeijing 100875China Northwest Institute of Plateau Biology Chinese Academy of SciencesQinghai 810008China Nanjing Institute of Environmental Sciences Ministry of Ecology and EnvironmentNanjing 210042China

Water risk early warning systems based on the water environmental carrying capacity(WECC)are powerful and effective tools to guarantee the sustainability of *** work on the early warning of WECC has mainly concerned the comprehensive evaluation of the status quo and lacked a quantitative prejudgement and warning of future *** addition,existing quantitative methods for short-term early warning have rarely focused on the integrated change trends of the early warning *** the periodicity of the socioeconomic system,however,the water environmental system also follows a trend of cyclical ***,it is meaningful to monitor and use this periodicity for the early warning of the *** this study,we first adopted and improved the prosperity index method to develop an integrated water risk early warning *** also constructed a forecast model to qualitatively and quantitatively prejudge and warn about the development trends of the water environmental *** selected the North Canal Basin(an essential connection among the Beijing-Tianjin-Hebei region)in China as a case study and predicted the WECC in 25 water environmental management units of the basin in 2018–*** found that the analysis of the prosperity index was helpful in predicting the WECC,to some *** result demonstrated that the early warning system provided reliable prediction(root mean square error of 0.0651 and mean absolute error of 0.1418),and the calculation results of the comprehensive early warning index(CEWI)conformed to the actual situation and related research in the river *** 2008 to 2023,the WECC of most water environmental management units in the basin had improved but with some spatial differences:the CEWI was generally poor in areas with many human disturbances,while it was relatively good in the upstream regions with higher forest and grass covers as well as in the downstream areas with larger water ***,through a sensitiv

关键词： water risk early warning system water environmental carrying capacity prosperity index water management North Canal(Beiyun River)

FAST ACOUSTIC IMAGING FOR A 3D PENETRABLE OBJECT IMMERSED IN A SHALLOW WATER WAVEGUIDE＊

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2013年第5期31卷 449-469页

作者： ju qiu Zhongbo Zhang Wenfeng Pan Mathematical School Jilin University Changchun 130000 China zhongbozhang@jlu edu. cn School of Science Wuhan University of Technology Wuhan 430070 China

The paper is concerned with the inverse problem for reconstructing a 3D penetrable ob- ject in a shallow water waveguide from the far-field data of the scattered fields with many acoustic point source incidences. An indicator sampling method is analyzed and presented for fast imaging the size, shape and location of such a penetrable object. The method has the advantages that a priori knowledge is avoided for the geometrical and material proper- ties of the penetrable obstacle and the much complicated iterative techniques are avoided during the inversion. Numerical examples are given of successful shape reconstructions for several 3D penetrable obstacles having a variety of shapes. In particular, numerical results show that the proposed method is able to produce a good reconstruction of the size, shape and location of the penetrable target even for the case where the incident and observation points are restricted to some limited apertures.

关键词： Oceanic waveguide Penetrable object Inverse problems Indicator samplingmethod.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

植物激素对棉花蕾铃脱落的调控研究进展

作物学报 2025年第1期51卷 1-29页

作者：谢章书谢学方屠小菊刘爱玉董合忠周仲华湖南农业大学农学院/作物生理与分子生物学教育部重点实验室湖南长沙410128 中国热带农业科学院橡胶研究所海南海口571101 山东省农业科学院经济作物研究所山东济南250000

棉花蕾铃脱落是一个普遍存在的现象,有对逆境环境胁迫的主动适应性脱落,也有因品种遗传特性、环境条件、栽培措施以及生物和非生物胁迫被动的受损脱落。蕾铃脱落直接影响着棉花的产量,国内外现有公开报道多集中于20世纪50、60年代关于... 详细信息

棉花蕾铃脱落是一个普遍存在的现象,有对逆境环境胁迫的主动适应性脱落,也有因品种遗传特性、环境条件、栽培措施以及生物和非生物胁迫被动的受损脱落。蕾铃脱落直接影响着棉花的产量,国内外现有公开报道多集中于20世纪50、60年代关于乙烯和脱落酸对棉花蕾铃脱落影响的初步发现。结合其他植物的研究结果来看,蕾铃脱落似乎与生长素、赤霉素和细胞分裂素等促生长类激素的下降以及乙烯和脱落酸等抑制生长类激素的升高密切相关,激素在植物体内不仅介导新陈代谢过程,还协调着与信号通路相关的调控因子,在脱落过程中起着关键作用。本文从植物激素调控入手,综述了近年来包括脱落区形成和作用的分子调控机制以及各激素在棉花蕾铃脱落以及其他植物(生殖)器官脱落过程中的响应和调控机制等。发现目前以棉花蕾铃脱落为对象的研究非常匮乏,且多集中于少数激素对棉花生殖生长影响的有限研究,缺乏对导致蕾铃脱落的深层次机制的探究和解析。因此,未来研究方向应着重于探究棉花蕾铃脱落的遗传基础、发掘新的抗脱落基因资源和培育抗脱落棉花品种,同时加强在以棉花为模型植物下,蕾铃脱落与植物激素调节的关系研究,为提高棉花产量提供理论依据和技术支持。

关键词：棉花植物激素蕾铃脱落研究现状研究方向

Design,Mobility Analysis and Gait Planning of a Leech-like Soft Crawling Robot with Stretching and Bending Deformation

同方期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2023年第1期20卷 69-80页

作者： Manjia Su Rongzhen xie Yu qiu Yisheng Guan Biomimetic and Intelligent Robotics Lab(BIRL) School of Electromechanical EngineeringGuangdong University of TechnologyHEMCGuangzhou510006GuangdongChina

Soft climbing/crawling robots have been attracting increasing attention in the soft robotics community,and many prototypes with basic locomotion have been *** existing soft robots achieve locomotion by planar bending deformation and lack sufficient *** the mobility of soft climbing/crawling robots is still an open and challenging *** this end,we present a novel pneumatic leech-like soft robot,Leechbot,with both bending and stretching deformation for *** a morphological structure,the robot consists of a three-chambered actuator in the middle for the main motion,two chamber-net actuators that act as ankles,and two suckers at the ends for anchoring on *** peristaltic motion for locomotion is implemented by body stretching,and direction changing is achieved by body *** to the novel design and two deformation modes,the robot can make turns and transit between different surfaces;the robot,hence,has excellent *** development of the robot prototype is presented in detail in this *** control its motion,tests were carried out to determine the relationship between step length and air pressure as well as the relationship between motion speed and periodic delay time.A kinematic model was established,and the kinematic mobility and surface transitionability were *** planning based on the inflating sequence of the actuating chambers is presented for straight crawling,turn making,and transiting between surfaces and was verified by a series of experiments with the *** results show that a high mobility in soft climbing/crawling robots can be achieved by a novel design and by proper gait planning.

关键词： Biomimetic robot-Soft robot Climbing robot-Bio-inspiration-Kinematic mobility Gait planning