A Novel Multiple DBC-staked units Package to Parallel More Chips for SiC Power Module

Silicon carbide(SiC) power modules play an essential role in the electric vehicle drive system. To improve their performance, reduce their size, and increase production efficiency, this paper proposes a multiple staked direct bonded copper(DBC) unit based power module packaging method to parallel more chips. This method utilizes mutual inductance cancellation effect to reduce parasitic inductance. Because the conduction area in the new package is doubled, the overall area of power module can be reduced. Entire power module is divided into smaller units to enhance manufacture yield, and improve design freedom. This paper provides a detailed design, analysis and fabrication procedure for the proposed package structure. Additionally, this paper offers several feasible solutions for the connection between power terminals and DBC untis. With the structure, 18dies were paralleled for each phase-leg in a econodual size power module. Both simulation and double pulse test results demonstrate that, compared to conventional layouts, the proposed package method has 74.8% smaller parasitic inductance and 34.9% lower footprint.

Multi-Objective Prediction and Optimization of Vehicle Acoustic Package Based on ResNet Neural Network

Vehicle interior noise has emerged as a crucial assessment criterion for automotive NVH(Noise,Vibration,and Harshness).When analyzing the NVH performance of the vehicle body,the traditional SEA(Statistical Energy Analysis)simulation technology is usually limited by the accuracy of the material parameters obtained during the acoustic package modeling and the limitations of the application conditions.In order to effectively solve these shortcomings,based on the analysis of the vehicle noise transmission path,a multi-level objective decomposition architecture of the interior noise at the driver’s right ear is established.Combined with the data-driven method,the ResNet neural network model is introduced.The stacked residual blocks avoid the problem of gradient dis-appearance caused by the increasing network level of the traditional CNN network,thus establishing a higher-precision prediction model.This method alleviates the inherent limitations of traditional SEA simulation design,and enhances the prediction performance of the ResNet model by dynamically adjusting the learning rate.Finally,the proposed method is applied to a specific vehicle model and verified.The results show that the proposed meth-od has significant advantages in prediction accuracy and robustness.

基于SIP技术的固态硬盘电路设计

存储系统小型化、高性能需求与日俱增,为此设计了一款基于SiP技术的固态硬盘电路,用于验证存储系统SiP电路的可行性。该SiP电路内部以SSD控制模块为核心处理单元,集成了用于数据存储的NAND颗粒、用于固件存储的SPI Flash以及电源管理等元器件。在搭建的软硬件平台上进行底层ATA指令验证以及与传统分离式存储系统的对比性能测试,证明了应用SiP技术的存储系统具备高性能、小型化、低功耗等诸多优势,为后续SiP存储系统的设计和验证奠定了一定的技术基础。

Bisphenol A (BPA) Contamination in Whole Milk Marketed in Different Packages

Bisphenol A (BPA), an important endocrine disruptor, is used in the manufacturing of various materials, including food packaging. Ingestion of contaminated foodstuffs is, in fact, the most relevant form of exposure to this substance. However, scarce data on the presence of this contaminant in milk, or whether different types of food packaging influence food contamination are available in Brazil. This study, therefore, aimed to evaluate the BPA contamination of whole milk (fluid and powder) samples packaged in different types of packaging (Tetra Pak?;PET: Poly (ethylene terephthalate;Metallic can (epoxy resin);Polyethylene (PE) and poly (vinylidene chloride) (PVDC);Laminated Film - Metallized Polyester-Polyethylene and glass) and marketed metropolitan region of Rio de Janeiro, Brazil. An analytical method for the BPA determination in milk was optimized for both fluid (pasteurized and ultra-high temperature) and powdered milk samples. A modified QuEChERS method was applied, and BPA determinations were conducted by ultra-performance liquid chromatography coupled with sequential mass spectrometry (HPLC-MS/MS). The validated method was then applied to 51 milk samples, where BPA was detected in five samples (9.8%) and quantified in two (3.8%).

基于硅基堆叠SIP技术的超宽带T/R组件

传统的超宽带T/R组件采用的是两维砖块式结构,体积和重量已不适应目前小型化、低剖面、易共形的相控阵天线要求。文中提出的基于硅基堆叠系统级封装(SIP)技术,将四通道的射频芯片高度集成在硅基介质基板上,将多层介质基板厚金压合,实现多层堆叠的三维封装。通过采用芯片多功能集成技术和超宽带射频信号的垂直互连技术,设计出三维堆叠的四通道超宽带T/R组件。T/R组件带宽为6 GHz~18 GHz,单通道的发射功率优于23 dBm,接收增益优于20 dB,可实现6位数控衰减及6位数控移相,尺寸仅有13.0 mm×13.0 mm×3.4 mm。该技术可以实现多通道超宽带T/R组件的SIP封装,有利于工程应用。

Modified Atmospheric Packaging and Its Effect on Postharvest Cannabis Quality

Cannabis sativa L. is used as fiber, food, and medicine in several countries. Though it is illegal for recreational use in most of the world, there are some countries that have legalized production and sale. There is a lot of research on production of cannabis, but less so on storage technologies. Cannabis contains several high value compounds, such as cannabinoids and terpenoids, that are susceptible to degradation via light, temperature, and oxygen. Several studies have explored temperature and light, and industry has adjusted accordingly. However, less is known about oxygen-induced degradation. Biochemical studies have demonstrated oxidative degradation of high value compounds, and many producers use some form of modified atmospheric packaging (MAP) for storage. However, the efficacy of MAP is unclear. The objective of this paper is to review our current understanding of MAP in postharvest cannabis storage and identify avenues where additional research is needed.

SiP芯片测试系统的设计

系统级封装(System in Package,SiP)电路包含多个功能的裸芯片,具有尺寸小、功耗低、性能高等优点,应用广泛,但结构、功能复杂,如何进行可靠性评价越来越得到关注。针对SiP电路的可靠性评价问题,设计了一套SiP电路测试系统。该测试系统包含相应的软件和硬件,主要实现对SiP电路的实装测试、ATE(Automatic Test Equipment)测试和老化测试,使用该测试系统能够筛选出故障电路,实现电路的可靠性评价。

Sustainable, thermoplastic and hydrophobic coating from natural cellulose and cinnamon to fabricate eco-friendly catering packaging

Non-degradable polymers cause serious environmental pollution problem,such as the widely-used while unrecyclable coatings which significantly affect the overall degradation performance of products.It is imperative and attractive to develop biodegradable functional coatings.Herein,we proposed a novel strategy to successfully prepare biodegradable,thermoplastic and hydrophobic coatings with high transparence and biosafety by weakening the interchain interactions between cellulose chain.The natural cellulose and cinnamic acid were as raw materials.Via reducing the degree of polymerization(DP)of cellulose and regulating the degree of substitution(DS)of cinnamate moiety,the obtained cellulose cinnamate(CC)exhibited not only the thermalflow behavior but also good biodegradability,which solves the conflict between the thermoplasticity and biodegradability in cellulose-based materials.The glass transition temperature(T_(g))and thermalflow temperature(T_(f))of the CC could be adjusted in a range of 150–200℃ and 180–210℃,respectively.The CC with DS<1.2 and DP≤100 degraded more than 60%after an enzyme treatment for 7 days,and degraded more than 80%after a composting treatment for 42 days.Furthermore,CC had no toxicity to human epidermal cells even at a high concentration(0.5 mg mL^(-1)).In addition,CC could be easily fabricated into multifunctional coating with high hydrophobicity,thermal adhesion and high transparence.Therefore,after combining with cellophane and paperboard,CC coating with low DP and DS could be used to prepare fully-biodegradable heat-sealing packaging,art paper,paper cups,paper straws and food packaging boxes.

一种用于SIP芯片的IO功能测试方法及装置

针对目前SIP芯片的IO功能测试依靠的ATE测试机价格昂贵,使用不便,以及人工测试效率低、易出错的问题,提出一种用于SIP芯片的IO功能测试方法及装置的设计方案。结合IO功能测试特征,利用辅助测试模块、互联电路板和上位机,构建出了该测试方法及装置的核心组成部分。该系统能够满足不同封装类型的SIP芯片的使用,根据实际测试情况,可任意配置测试启动项,提升测试效率,并降低了由于人工参与而引起的测试出错的概率,同时能够方便地记录测试数据,利于后期的追踪查验。

基于SiP技术的信号处理通道设计

随着军用无人机等航电系统不断朝着小型化、智能化、综合化的方向发展,如何有效满足装备的低SWaP(Size,Weight and Power)要求成为一大难题。介绍了某型宽带综合化数字预处理模块的研制,利用“裸芯片+高密度基板”系统级封装(SiP)的方式对信号处理平台(DSP、FPGA、SerDes和DDR芯片)进行集成,替代目前业界普遍采用的“封装芯片+印制板+平面集成”的传统方式,实现宽带综合化数字信号处理模块的高密度集成。在主要性能指标(可编程逻辑资源、定点处理能力、浮点处理能力、数据传输速率)不变的情况下,使得信号处理模块的面积降低为45 mm×45 mm,重量降低到103 g。

SIPS模型视域下电影短视频宣发策略探究

随着短视频成为用户娱乐与社交的主要形式,电影宣发方也将其营销主阵地转至短视频平台,然而宣发实效与宣发方期待常相去甚远。如何提升短视频宣发与影片内容、用户期待的契合度,进而增强宣发实效,成为当前电影营销的核心关切。基于社交媒体时代的SIPS模型研究发现,当前电影短视频宣发存在对用户观影期待感知不足、广宣内容模式化、宣发内容与购买转化相脱节、观众自传播效应尚未形成等问题,并提出以共情宣发满足观影期待、大数据决策锚定观影兴奋点、强关系连接促进购买转化、激活私域流量形成消费闭环的宣发策略。

Analysis of quality-related proteins in golden pompano(Trachinotus ovatus)fillets with modified atmosphere packaging under superchilling storage

Here,we aimed to study the changes in proteome of golden pompano fillets during post-mortem storage.Tandem mass tags(TMT)-labeled quantitative proteomic strategy was applied to investigate the relationships between protein changes and quality characteristics of modified atmosphere packaging(MAP)fillets during superchilling(-3°C)storage.Scanning electron microscopy was used to show that the muscle histology microstructure of fillets was damaged to varying degrees,and low-field nuclear magnetic resonance was used to find that the immobilized water and free water in the muscle of fillets changed significantly.Total sulfhydryl content,TCA-soluble peptides and Ca2+-ATPase activity also showed that the fillet protein had a deterioration by oxidation and denaturation.The Fresh(FS),MAP,and air packaging(AP)groups were set.Total of 150 proteins were identified as differential abundant proteins(DAPs)in MAP/FS,while 209 DAPs were in AP/FS group.The KEGG pathway analysis indicated that most DAPs were involved in binding proteins and protein turnover.Correlation analysis found that 52 DAPs were correlated with quality traits.Among them,8 highly correlated DAPs are expected to be used as potential quality markers for protein oxidation and water-holding capacity.These results provide a further understanding of the muscle deterioration mechanism of packaging golden pompano fillets during superchilling.

Study on the Influence of Food Packaging on the Psychology of Different Groups of Consumers

With the vigorous development of consumer culture in today’s society,various types of food packaging also appear in front of consumers in different forms.There are very big differences in food packaging in terms of shape,color,style and other aspects of information transmission,which have the most direct impact on the audience’s food consumption needs.Driven by the consumption-oriented society,food packaging has shown very obvious comprehensive characteristics,is significantly interdisciplinary,and has close connections with other disciplines.This article will analyze and sort out the impact of food packaging on consumer psychology from different perspectives.

基于SIPS模型的短视频二次传播策略研究

伴随着新媒体的崛起,信息的传播方式变得更加多元化。信息接收者与信息传递者之间的界限变得更为模糊,由共享与转发行为形成的二次传播也在信息传递中占据了重要地位。本文对二次传播形成的影响因素进行研究,在内容上首先对研究背景、相关概念、二次传播对国内短视频发展的影响做了简要叙述,其次通过将SIPS模型带入广告视频的传播中,合理运用SIPS模型的传播特征、兴趣和共鸣的内在规律、双向沟通和及时性响应理论,为短视频的二次传播提供新的思路。

基于SIP软交换模型的电力多业务通信系统设计与实现

目前,某电厂行政交换机不具备网际互连协议(Internet Protocol,IP)通信功能,考虑设备的平滑过渡和应对下一代网络的融合发展,对电力多业务通信系统进行扩容改造,新增一套行政软交换系统,主要涉及行政软交换建设方案、系统整体安全方案、网络服务质量(Quality of Service,QoS)保证与带宽要求以及与电信交换网统一编号4个方面。各系统间利用现有网络采用会话初始协议(Session Initialization Protocol,SIP)软交换模型中继互联互通,将行政和调度业务融合至一个系统,有效解决电力厂房和新办公大楼的通信问题,在电力系统通信网上实现电力行政和调度多业务的灵活、安全及可靠应用。

粉丝经济视角下乡村美食类短视频传播机理研究——基于SIPS模式的分析

乡村振兴战略背景下的乡村美食类短视频打破了乡村信息的固有壁垒,农民群体通过高密度的媒介接触,进一步促进了农业农村的蓬勃发展。乡村美食类短视频获得受众青睐很大程度上依托于粉丝群体情感消费所带来的附加值,而乡村美食类短视频的创作与接收也极大等同于情感商品的生产与流通的过程。本文从粉丝经济的视角出发,基于SIPS模式分析乡村美食类短视频的传播机理。

Research on Silicon Carbide Dispersion-Reinforced Hypereutectic Aluminum-Silicon Electronic Packaging Materials

The objective of this study is to improve the mechanical properties and machining performance of high thermal conductivity and low expansion silicon carbide dispersion-strengthened hypereutectic aluminum-silicon electronic packaging materials to meet the needs of aviation,aerospace,and electronic packaging fields.We used the powder metallurgy method and high-temperature hot pressing technology to prepare SiC/Al-Si composite materials with different SiC contents(5vol%,10vol%,15vol%,and 20vol%).The results showed that as the SiC content increased,the tensile strength of the composite material first increased and then decreased.The tensile strength was the highest when the SiC content was 15%;the sintering temperature significantly affected the composite material’s structural density and mechanical properties.Findings indicated 700℃was the optimal sintering and the optimal SiC content of SiC/Al-Si composite materials was between 10%and 15%.Besides,the sintering temperature should be strictly controlled to improve the material’s structural density and mechanical properties.

基于SIP的网络视频监控系统的设计研究

为了有效解决多个网络视频监控系统之间存在的信令互通问题,本文根据SIP协议,设计了一个基于该协议的网络视频监控系统。文章简单概述了SIP初始会话协议,然后利用MEPG4视频编码格式、SIP呼叫机制、信令控制等实现了对网络视频流的集中管理,并在传统视频监控系统模型的基础上,实现了对网络监控系统的模型设计,并对每一个功能模块进行了阐述。最后,该系统的设计不仅实现了复杂组网环境下的网络视频连接、互联互通,还使得数字化、智能化以及网络化视频监控系统的构建成为可能。

基于SIPS模型的图书馆短视频阅读推广策略研究

本文研究基于SIPS模型的图书馆短视频阅读推广策略。通过以SIPS模型为理论指导,本研究设计了与SIPS模型构成要素对应的图书馆短视频阅读推广创新思路。在激发情感认同方面,通过创造情感共鸣,激发读者参与活动的内生动力;在强化参与意愿方面,调动读者常态化参与活动的积极性;在多维立体交互方面,打造图书馆与读者深度交互的阅读推广局面。通过本研究的创新策略,能够有效激发读者的情感共鸣、强化阅读意愿、参与阅读行为,进而推动图书馆短视频阅读推广的实践。

基于ARM+FPGA双核异构的SiP设计

为满足未来嵌入式计算机发展的小型化需求,对电子系统小型化的关键技术SiP展开探索,介绍一款基于ARM+FPGA双核异构的SiP产品的设计过程。该SiP产品由FPGA裸芯、基于ARM Cortex-M4的MCU裸芯、flash裸芯、电平转换功能裸芯、RS422收发器裸芯以及若干阻容分立器件组成。所有的裸芯通过先进封装技术,以基板为载体集成到一个模块中,以节约印制电路板面积并降低成本,有助于降低硬件工程师设计工作难度,实现了嵌入式板卡的小型化和高集成化。SiP模块封装结构采用PBGA的封装,以四层BT基板为载体,采用塑封工艺,大幅度减小模块尺寸。