Comparative Analysis of the Effects of False Low-Price Marketing Strategy on Multiple Platforms

In order to make full use of the characteristics of commodity prices,merchants on e-commerce platforms have adopted the low-price marketing strategy.Regular promotional discounts can bring new vitality to the commodity sales market,but extreme discount marketing methods would lead to serious impacts on the sales of competing products,thus affecting the stable development of the online shopping market.The sales data of four electrical products using the false low-price marketing strategy on three e-commerce platforms(Taobao,JD,and Amazon)were used in this study.The sales data from different e-commerce platforms and different time periods were analyzed,and one-way ANOVA was used on the factors affecting the effect of marketing strategy.The results showed that there is a significant difference between the direct marketing of high-priced products and low-priced products on Taobao;the difference between the marketing effects of high-priced products and mid-priced products on JD and Amazon is significant.This analysis would help businesses formulate reasonable marketing strategies and promote the stable development of the online shopping market.

超深层“断滩体”概念、地质模式及地震表征技术方法——以塔里木油田为例

“断滩体”是塔里木盆地富满油田奥陶系超深层新型油藏类型,是超深层油气储量保持增长的有利接替勘探领域。以野外露头资料为基础,结合钻井、地震、生产动态等资料,建立了超深碳酸盐岩油气藏“断滩体”地质发育模式,并形成了超深碳酸盐岩“断滩体”地震刻画技术。研究结果表明:1)“断滩体”的形成机制为超深层灰岩台内滩体受主干断裂派生次序级网状断裂破碎作用改造形成。2)基于“断滩体”地质特征,采用波形指示反演识别滩体边界;利用地震子波分解、反射特征强化法识别低级序断裂;通过滩体与低级序断裂的融合,精细刻画出“断滩体”的边界及内部结构,是表征“断滩体”的有效手段。3)富满东部三维区鹰山组下段发育典型的“断滩体”,明确了“断滩体”圈闭范围,识别断滩体面积42.2 km^(2),勘探潜力较大。富东1井的成功突破,预示着富满油田新的控储模式的确立。超深层“断滩体”地震识别技术为其他地区类似储层的预测提供较好的借鉴意义。

基于STM32的低功耗智能门锁系统设计

针对传统智能门锁的安全性与高功耗方面存在的问题,设计并开发一款基于STM32F103单片机的智能门锁。本项目可分别通过键入密码、指纹、RFID刷卡三种方式进行解锁,并且对其功耗进行了改良,使其在无人使用的时候达到低功耗。同时,本项目增加了WIFI模式进行连接阿里云从而达到物联网模式,从而监控门锁的实时状态,提高了门锁的安全性与可靠性。本项目的整体设计具有较高的完整性和实用性,不仅使门锁的安全性、便利性得到了提高,还可对门锁的实时状态进行检测,更为智能化。最后,本项目通过实物进行了实验验证,达到了预期结果。

Boosting of reversible capacity delivered at a low voltage below 0.5 V in mildly expanded graphitized needle coke anode for a high-energy lithium ion battery

The rate performance and cycle stability of graphitized needle coke(GNC)as anode are still limited by the sluggish kinetics and volume expansion during the Li ions intercalation and de-intercalation process.Especially,the output of energy density for lithium ion batteries(LIBs)is directly affected by the delithiation capacity below 0.5 V.Here,the mildly expanded graphitized needle coke(MEGNC)with the enlarged interlayer spacing from 0.346 to 0.352 nm is obtained by the two-step mild oxidation intercalation modification.The voltage plateau of MEGNC anode below 0.5 V is obviously broadened as compared to the initial GNC anode,contributing to the enhancement of Li storage below the low voltage plateau.Moreover,the coin full cell and pouch full cell configured with MEGNC anode exhibit much enhanced Li storage ability,energy density and better cycling stability than those full cells configured with GNC and commercial graphite anodes,demonstrating the practical application value of MEGNC.The superior anode behaviors of MEGNC including the increased effective capacity at low voltage and superior cyclic stability are mainly benefited from the enlarged interlayer spacing,which not only accelerates the Li ions diffusion rate,but also effectively alleviates the volume expansion and fragmentation during the Li ions intercalation process.In addition,the above result is further confirmed by the density functional theory simulation.This work provides an effective modification strategy for the NC-based graphite to enhance the delithiation capacity at a low voltage plateau,dedicated to improving the energy density and durability of LIBs.

Integration of high-performance spin-orbit torque MRAM devices by 200-mm-wafer manufacturing platform

We demonstrate in-plane field-free-switching spin-orbit torque(SOT)magnetic tunnel junction(MTJ)devices that are capable of low switching current density,fast speed,high reliability,and,most importantly,manufactured uniformly by the 200-mm-wafer platform.The performance of the devices is systematically studied,including their magnetic properties,switch-ing behaviors,endurance and data retention.The successful integration of SOT devices within the 200-mm-wafer manufactur-ing platform provides a feasible way to industrialize SOT MRAMs.It is expected to obtain excellent performance of the devices by further optimizing the MTJ film stacks and the corresponding fabrication processes in the future.

Hydrocarbon accumulation and exploration prospect of mound-shoal complexes on the platform margin of the fourth member of Sinian Dengying Formation in the east of Mianzhu-Changning intracratonic rift, Sichuan Basin, SW China

Drilling,seismic and logging data were used to evaluate the hydrocarbon accumulation conditions of the mound-shoal complexes in the platform margin of the fourth member of Sinian Dengying Formation in the east side of the Mianzhu-Changning intracratonic rift in the Sichuan Basin.The four understandings are:(1)The platform margin belt of the Deng 4 Member can be divided into three sections,northern,middle and southern;the middle section is at the core of the Gaoshiti-Moxi paleouplift and the structural high now,while the southern and northern sections are at the slope of the paleouplift and the structural lows now;the three sections have similar development characteristics and reservoir features of platform margin mound-shoal complex.(2)In the margin of the east side of the rift,there are several faults nearly perpendicular to the platform margin belt,the faults divide the platform margin belt into rugged paleo-landform,and the high part developed platform margin mound-shoal complexes and the reservoirs are good in physical properties,while the low part developed inter-beach depression and no mound-shoal complexes,where the reservoirs are poor in physical properties.(3)The six groups of faults nearly perpendicular to the platform margin belt divide the platform margin belt into seven large mound-shoal complexes which have similar hydrocarbon accumulation conditions and accumulation evolution process and are rich in petroleum.(4)The inter shoal depressions between the mound-shoal complexes are characterized by tighter lithology,which can block the updip direction of the mounds and shoals at the lower part of the slope of the paleouplift and are favorable for the later preservation of mound-shoal gas reservoirs.This has been proved by Well Jiaotan 1 and Heshen 2 drilled successfully.The mound-shoal complexes on the platform margin of the structural slope area have a good exploration prospect.

Low Altitude Satellite Constellation for Futuristic Aerial-Ground Communications

This paper discusses the significance and prospects of low altitude small satellite aerial vehicles to ensure smooth aerial-ground communications for next-generation broadband networks.To achieve the generic goals of fifthgeneration and beyondwireless networks,the existing aerial network architecture needs to be revisited.The detailed architecture of low altitude aerial networks and the challenges in resource management have been illustrated in this paper.Moreover,we have studied the coordination between promising communication technologies and low altitude aerial networks to provide robust network coverage.We talk about the techniques that can ensure userfriendly control and monitoring of the low altitude aerial networks to bring forth wireless broadband connectivity to a new dimension.In the end,we highlight the future research directions of aerial-ground communications in terms of access technologies,machine learning,compressed sensing,and quantum communications.

Analysis of Wireless Backhaul Networks Based on Aerial Platform Technology for 6G Systems

As next generation communication technologies emerge,new high data rate applications and high-definition large-screen video streaming have become very popular.As a result,network traffic has been increasing so much that existing backhaul networks soon will not be able to support all traffic demands.To support these needs in future 6G mobile systems,the establishment of an additional backhaul wireless network is considered essential.As one of the solutions,a wireless backhaul network based on an aerial platform has been proposed.In order to explore the potential of aerial platforms as wireless backhaul networks,in this paper,the categories for wireless backhaul networks based on aerial platforms are investigated.This paper includes a survey of the definitions and characteristics of low altitude platforms(LAPs)and high altitude platforms(HAPs),as well as channel models according to the atmosphere.For wireless backhaul network designs based on aerial platforms,altitude and platform selection options,deployment options,energy issues,and security based on target location and performance were considered in the analysis and investigation.

Urban Pocket Park System Planning Based on Low Carbon Comprehensive Benefits: A Case Study of Chaowai District in Beijing

Low carbon landscape development is an emerging approach of landscape design,which aims to promote sustainable development,and reduce energy consumption and environmental impact by reducing carbon emissions.As an important component of low carbon landscape construction,the construction of urban pocket park system based on mini-parks plays a crucial role in improving the urban greening level,increasing the urban green space,alleviating the urban pressure,improving the living and healthy environment of urban residents,and promoting the urban ecological balance.Taking Chaowai district of Beijing as an example,this paper calculates the ecological value of trees including energy contribution,carbon sequestration,ability to improve rainfall runoff and aesthetic value by collecting the information of trees and the plot on which the trees are located through the i-Tree platform,which provides important reference value for the urban pocket park system planning to create low carbon comprehensive benefits.

Real Time Vehicle Status Monitoring under Moving Conditions Using a Low Power IoT System

In the era of the Internet of Things(IoT),the ever-increasing number of devices connected to the IoT networks also increases the energy consumption on the edge.This is prohibitive since the devices living on the edge are generally resource constrained devices in terms of energy consumption and computational power.Thus,trying to tackle this issue,in this paper,a fully automated end-to-end IoT system for real time monitoring of the status of a moving vehicle is proposed.The IoT system consists mainly of three components:(1)the ultra-lowpower consumptionWireless SensorNode(WSN),(2)the IoT gateway and(3)the IoT platform.In this scope,a selfpoweredWSN having ultra-low energy consumption(less than 10 mJ),which can be produced by environmental harvesting systems,is developed.WSN is used for collecting sensors’measurements from the vehicle and transmitting them to the IoT gateway,by exploiting a low energy communication protocol(i.e.,BLE).A powerful IoT gateway gathers the sensors’measurements,harmonizes,stores temporary and transmits them wirelessly,to a backend server(i.e.,LTE).And finally,the IoT platform,which in essence is a web application user interface(UI),used mainly for almost real time visualization of sensors’measurements,but also for sending alerts and control signals to enable actuators,installed in the vehicle near to the sensors field.The proposed system is scalable and it can be adopted for monitoring a large number of vehicles,thus providing a fully automatic IoT solution for vehicle fleet management.Moreover,it can be extended for simultaneous monitoring of additional parameters,supporting other low energy communication protocols and producing various kinds of alerts and control signals.

Influence Analysis on the Floating Underwater Monitoring System Applicable for Very-Low-Frequency Acoustic Measurement

Ocean vector acoustic measurement is feasible affected by the hydrodynamic interference caused by the flow fluctuations and structural vibrations, especially in the very-low-frequency monitoring. Hence, a novel horizontal floating platform including a horizontal floating cable, vertical mooring cable and floating main body is proposed and described in this paper. It has the advantages of good maneuverability along with the current and multi-stage vibration isolation. The main application of this platform is to measure the ocean ambient noise coming from the wave fluctuation and the deterministic acoustic signals such as aquatic organisms, underwater targets and sailing vehicles. The influence of the current fluctuation on the attitude angle and flow induced vibration of cables and main body are analyzed with some previous sea test data. Moreover, the comparison between the vertical type platform used before and the horizontal type platform is also discussed. It is concluded that there is obvious relevance between the attitude angle and ocean current variation. Meanwhile, the abnormal influence on the main body is caused by the vibration transmission from the fluctuation of cables. There will be the influence on the accuracy of the acoustic measurement above 100 Hz, and the inherent vibration characteristic of the main body is the primary reason.

Experiment and Analysis on Flue Gas Low Temperature Corrosion Monitoring

Thermal loss of exhaust flue gas accounts for the largest proportion of the total boiler thermal loss. Nowadays in China, the exhaust gas temperature in many thermal power plants is much higher than the designed value, thus, the recycle and reuse of the waste heat of tail flue gas is necessary. However, lower exhaust gas temperature will aggravate low temperature corrosion of the tail heating surface, which also causes huge economic losses. In order to solve this problem, this paper designs a monitoring experiment platform of flue gas low temperature corrosion, which can measure the corrosion condition of different materials by different flue gas compositions and temperature corrosion speeds. Besides, effects of low temperature corrosion factors are analyzed to find the best exhaust gas temperature and the surface material of tail heating surface.

低代码开发平台发展现状及标准化研究

当前,低代码开发平台迎来快速发展期,已成为应用软件开发的重要技术趋势。通过对低代码开发平台发展以及标准化现状进行梳理,提炼低代码开发平台的通用能力要求标准,并提出进一步的发展建议,为相关者开展低代码开发平台的开发、采购与使用提供参考。

Prospects of Using Low-Code in the Creation of Automated Systems

Ever-changing market conditions and a rapidly changing IT landscape call for fast and cheap ways to meet software demands. In order to tackle these problems, low-code development platforms (LCDPs) have emerged. These platforms are designed with the idea to limit recurring traditional hand-coding and programming. This article provides a theoretical overview of low-code solutions. The advantages and disadvantages of using LCDP in the creation of automated systems are considered. In conclusion, a conclusion is formulated about the prospects of using low-code technology.

面向装备平台的敏捷交换芯片设计与实现

在构建车载、舰船、航空航天等装备平台网络系统时,需要综合考虑功能、性能、体积、功耗、易用性等制约因素,传统高性能的商用网络交换芯片功耗高、配置和使用复杂,难以满足相关需求。对此提出了一种面向装备平台的可编程、低功耗的敏捷交换芯片架构。该架构引入协议无关的超长内容匹配-动作流水线,提供可编程的转发配置、流限速、报文修改等功能,支持现存各类网络协议及用户自定义协议。架构提供灵活的管理配置模式,可满足远程配置、无管理CPU的轻量化配置等多种应用需求。另外,通过敏捷交换协议的扩展功能,可将查表结果、动作处理记录、用户配置信息等随原报文一同送出芯片,实现单个报文粒度的精细化处理和灵活的功能扩展。基于敏捷交换架构,流片制造了YHHX-DS160敏捷交换芯片,该芯片可提供160 Gbps全接口线速交换能力,最大功耗仅6.6 W,能效比达到24 Gbps/W。

基于低代码平台搭建校园统一数据中台的研究

针对前期“按需、逐个、独立”的数字校园信息化建设导致学校间资源无法共享,进而形成“孤岛架构”的问题,提出将低代码平台和数据标准化嵌入融合,构建可以灵活搭建业务管理模块的数据中台,以实现数据的统一标准、统一采集、统一处理、统一分析,旨在为学校数据应用服务提供准确的数据支撑,并为高校的信息化发展降本增效。

随动辊压型低应力精密断料教学实验平台开发

为了增强学生对先进成形装备及低应力精密断料技术的理解,开发了随动辊压型低应力精密断料教学实验平台。该实验平台综合利用机械设计、传感器技术及计算机控制技术,将应力集中效应和随动辊压技术引入管料的精密分离断料工序中,设计了管料断面质量评价方法,对带有V型槽的45#钢及304不锈钢管料进行了裂纹可控式低应力精密下料实验,验证了断料效果。该实验平台不仅使低应力断料过程更加直观,还提升了学生对低应力精密成形技术的认识,增强了学生对“机械制造工程基础”“切削原理与刀具”及“先进制造技术”等课程的学习兴趣。

基于低代码平台的医院人才招聘管理系统建设与应用研究

医院人才招聘管理系统建设与使用是提升医院人才招聘工作有效性、精准化的基础与保障,也是公立医院推进智慧管理,实现高质量发展的必由之路,传统开发或采购统一产品受限于高昂开发费用、较长上线周期、无法满足个性化需求等问题而遭到诟病。低代码平台的出现,以其轻量级、快迭代、较少依赖开发人员等优点给医院智慧管理带来了新的选择。本研究采用低代码技术搭建医院人才招聘管理系统,对其系统架构、建设方法、基本原则进行优化,以期为应用低成本快速建设智慧医院管理系统提供借鉴。

低成本小批量微纳卫星控制系统的研制实践

针对微纳卫星的研制特点,结合控制系统研制过程中的具体实践,从单机产品设计、系统方案设计、测试和环境试验,以及软件开发方面,给出了微纳卫星降低成本、提高可靠性与研制效率的措施和建议.通过采用控制系统内部的冗余备份设计,以及系统级可靠性措施,简化了系统配置,并提高了系统可靠性.通过进行系统级的热循环试验可降低研制成本,并达到可靠性试验筛选的目的.通过开展平台化和通用化设计,完善和改进软件开发流程,提高了研制效率.所述方法和措施在卫星研制中取得了较好的效果.

基于核密度估计模型优化手术调度的设计与应用

目的针对现有手术患者转运平台转运流程中,手术状态节点变动存在人工操作依赖性和滞后性、手术衔接不高效的问题,改进手术患者转运平台的手术流转流程。方法结合集成蓝牙低能耗技术的智能手环、人员定位系统,运用核密度估计模型估算手术平均时长,从而改进手术患者转运平台的手术流转流程,并对模型的有效性进行验证。结果应用改进的手术转运平台后,首台延迟率、手术衔接时间较改进前下降6.2%、8.0 min,日均麻醉利用率和日间手术利用率较应用前提高了6.9%、6.4%,且差异均有统计学意义(P<0.01)。结论通过应用改进后的手术患者转运平台,手术室手术衔接效率更高,手术调度更加智能化,可有效提高手术室效率。