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Experimental Study for Effect of Multi-Site Spark Ignition on dedicated Hybrid Engine Performance under High dilution Condition

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Journal of Thermal Science 2025年第1期34卷 254-267页

作者： YAN Bowen WATErS Benjamin HAINES Andrew MCGHEE Mike HU Tiegang dENG Wei PU Yongxian MA Tianyu Powertrain Engineering r&d center Chongqing Changan Automobile Co.Ltd. Changan UK r&d Centre Limited

In this study,a triple spark ignition scheme was first designed on a three-cylinder 1.5-L dedicated hybrid engine（dHE）.On this basis,the effect of different ignition modes on engine combustion and emission characteristics was studied,especially under high dilution *** results tested at 2000 r/min and 0.8 MPa BMEP（brake mean effective pressure） show that with highly increased in-cylinder flow intensity,using only passive prechamber（PPC） has a lower lean limit than that with single central spark plug（CSP）,thereby leading to slightly higher minimum fuel consumption and nitrogen oxides（NOx） *** side spark plugs（SSP）based on PPC can result in improved capability of lean limit extension and engine performance than ***,the improvement level is lower than that with triple spark plugs（TSP）.As the excess air ratio λincreases,the advantage of PPC and PPC with SSP in improving the combustion phasing compared with CSP gradually ***,the increasing tendency of their ignition delay and combustion duration is more *** added SSP based on PPC can effectively shorten the ignition delay of leaner mixture,but the combustion duration can be only slightly *** a result,under extremely lean condition,the advantage of PPC and PPC with SSP in terms of combustion characteristics over CSP becomes much *** contrast,the TSP ignition can achieve much shorter ignition delay and combustion duration simultaneously under this *** to the highest available dilution level,the TSP ignition achieves the lowest raw ***,it can also reduce the raw carbon monoxide（CO） and hydrocarbons（HC） emissions compared to CSP due to a more thorough combustion of the end gas *** on the excellent performance of TSP,the highest engine brake thermal efficiency（BTE） was further *** results show that with normal rON 92 fuel,the engine finally achieved 43.69% and 45.02% BTE under stochiometric mode with exhaust

关键词： dedicated hybrid engine high dilution condition NOx emissions passive prechamber thermal efficiency triple spark plug scheme

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Constructing donor–Acceptor‑Linked COFs Electrolytes to regulate Electron density and Accelerate the Li^(+)Migration in Quasi‑Solid‑State Battery

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Nano-Micro Letters 2025年第1期17卷 456-471页

作者： Genfu Zhao Hang Ma Conghui Zhang Yongxin Yang Shuyuan Yu Haiye Zhu Yongjiang Sun Hong Guo School of Materials and Energy International Joint Research Center for Advanced Energy Materials of Yunnan ProvinceYunnan UniversityKunming 650091People’s Republic of China Yunnan Yuntianhua Co. LtdR&D CenterKunming 650228People’s Republic of China Southwest United Graduate School Kunming 650091People’s Republic of China

regulation the electronic density of solid-state electrolyte by donor–acceptor(d–A)system can achieve highly-selective Li^(+)transportation and conduction in solid-state Li metal *** study reports a high-performance solid-state electrolyte thorough d–A-linked covalent organic frameworks(COFs)based on intramolecular charge transfer *** other reported COFbased solid-state electrolyte,the developed concept with d–A-linked COFs not only achieves electronic modulation to promote highly-selective Li^(+)migration and inhibit Li dendrite,but also offers a crucial opportunity to understand the role of electronic density in solid-state Li metal *** introduced strong electronegativity F-based ligand in COF electrolyte results in highlyselective Li^(+)(transference number 0.83),high ionic conductivity(6.7×10^(-4)S cm^(−1)),excellent cyclic ability(1000 h)in Li metal symmetric cell and high-capacity retention in Li/LiFePO_(4)cell(90.8%for 300 cycles at 5C)than substituted C-and N-based *** is ascribed to outstanding d–A interaction between donor porphyrin and acceptor F atoms,which effectively expedites electron transferring from porphyrin to F-based ligand and enhances Li^(+)***,we anticipate that this work creates insight into the strategy for accelerating Li^(+)conduction in high-performance solid-state Li metal batteries through d–A system.

关键词： Electronic modulation engineering donor-acceptor-linked covalent organic frameworks Quasi-solid-state Li metal battery

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A new low-voltage and high-speed sense amplifier for flash memory

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Journal of Semiconductors 2011年第12期32卷 107-111页

作者：郭家荣冉峰 Microelectronic r&d center Shanghai University

A new low-voltage and high-speed sense amplifier is presented, based on a very simple direct currentmode comparison. It adopts low-voltage reference current extraction and a dynamic output method to realize its performance indicators such as low voltage, low power and high precision. The proposed amplifier can sense a 0.5 #A current gap and work with a lowest voltage of 1 V. In addition, the current power of a single amplifier is optimized by 15%.

关键词： flash memory sense amplifier current-mode low-voltage

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An rF front-end with an automatic gain control technique for a U/V band CMMB receiver

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Journal of Semiconductors 2011年第10期32卷 120-125页

作者：赵锦鑫胡雪青石寅王磊 Suzhou-CAS Semiconductor Integration r&d center

This paper presents a fully integrated rF front-end with an automatic gain control（AGC） scheme and a digitally controlled radio frequency varied gain amplifier（rFVGA） for a U/V band China Mobile Multimedia Broadcasting（CMMB） direct conversion *** rFVGA provides a gain range of 50 dB with a 1.6 dB step. The adopted AGC strategy could improve immunity to adjacent channel signal,which is of importance for CMMB *** front-end,composed of a low noise amplifier（LNA）,an rFVGA,a mixer and AGC,achieves an input referred 3rd order intercept point（IIP3） of 4.9 dBm with the LNA in low gain mode and the rFVGA in medium gain mode,and a less than 4 dB double side band noise figure with both the LNA and the rFVGA in high gain *** proposed rF front-end is fabricated in a 0.35μm SiGe BiCMOS technology and consumes 25.6 mA from a 3.0 V power supply.

关键词： CMMB rF front-end rFVGA AGC LNA mixer

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Coach Simplified Structure Modeling and Optimization Study Based on the PBM Method

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Chinese Journal of Mechanical Engineering 2016年第5期29卷 1010-1018页

作者： ZHANG Miaoli rEN Jindong YIN Ying dU Jian State Key Lab of Automotive Simulation and Control Jilin University hyundai Motor Technology & Engineering center (China) Ltd. r&d center FAW Group

For the coach industry, rapid modeling and efficient optimization methods are desirable for structure modeling and optimization based on simplified structures, especially for use early in the concept phase and with capabilities of accurately expressing the mechanical properties of structure and with flexible section forms. However, the present dimension-based methods cannot easily meet these requirements. To achieve these goals, the property-based modeling （PBM） beam modeling method is studied based on the PBM theory and in conjunction with the characteristics of coach structure of taking beam as the main component. For a beam component of concrete length, its mechanical characteristics are primarily affected by the section properties. Four section parameters are adopted to describe the mechanical properties of a beam, including the section area, the principal moments of inertia about the two principal axles, and the torsion constant of the section. Based on the equivalent stiffness strategy, expressions for the above section parameters are derived, and the PBM beam element is implemented in HyperMesh software. A case is realized using this method, in which the structure of a passenger coach is simplified. The model precision is validated by comparing the basic performance of the total structure with that of the original structure, including the bending and torsion stiffness and the first-order bending and torsional modal frequencies. Sensitivity analysis is conducted to choose design variables. The optimal Latin hypercube experiment design is adopted to sample the test points, and polynomial response surfaces are used to fit these points. To improve the bending and torsion stiffness and the first-order torsional frequency and taking the allowable maximum stresses of the braking and left turning conditions as constraints, the multi-objective optimization of the structure is conducted using the NSGA-II genetic algorithm on the ISIGHT platform. The result of the Paret

关键词： coach structure property-based modeling (PBM) simplification modeling multi-objective optimization

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Experimental research on characteristic of start-up pressure wave propagation in gelled crude oil by large-scale flow loop

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Journal of Central South University 2008年第S1期15卷 467-470页

作者：崔秀国艾慕阳姜保良霍连风张立新 PetroChina Pipeline r&d center

In order to research start-up pressure wave propagation mechanism and determine pressure wave speed in gelled crude oil pipelines accurately,experiment of Large-scale flow loop was carried *** the experiment,start-up pressure wave speeds under various operation conditions were measured,and effects of correlative factors on pressure wave were *** experimental and theoretical analysis shows that thermal shrinkage and structural properties of gelled crude oils are key factors influencing on start-up pressure wave *** quantitative analysis for these effects can be done by using volume expansion coefficient and structural property parameter of gelled crude oil.A new calculation model of pressure wave speed was developed on the basis of Large-scale flow loop experiment and theoretical analysis.

关键词： gelled crude oil start-up pressure wave propagation characteristic lager-scale flow loop

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Overview of 5G security technology

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Science China(Information Sciences) 2018年第8期61卷 107-131页

作者： Xinsheng JI Kaizhi HUANG Liang JIN Hongbo TANG Caixia LIU Zhou ZHONG Wei YOU Xiaoming XU Hua ZHAO Jiangxing WU Ming YI National digital Switching System Engineering & Technological r&d center Zhengzhou 450002 China National digital Switching System Engineering & Technological r&d center

The 5 th-generation mobile communication system(5 G) has higher security requirements than previous systems. Accordingly, international standard organizations, operators, and equipment manufacturers are focusing extensively on 5 G security technology. This paper analyzes the security requirements of 5 G business applications, network architecture, the air interface, and user privacy. The development trends of5 G security architecture are summarized, with a focus on endogenous defense architecture, which represents a new trend in 5 G security development. Several incremental 5 G security technologies are reviewed, including physical layer security, lightweight encryption, network slice security, user privacy protection, and block chain technology applied to 5 G.

关键词： 5G security endogenous defense mimic defense physical layer security lightweight encryption network slice security user privacy preservation block chain

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Stress-Strain Partitioning Analysis in dual Phase Steels

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Journal of Iron and Steel research International 2011年第S1期18卷 310-311页

作者： Eun-Joon Chun Nam-Hyun Kang Yong-Ho Park Man-Been Moon department of Materials Science and Engineering Pusan National UniversityBusan 609-735South Korea hyundai hysco r&d center 313Donggok-riSongsan-myeonDangjin-gunChungnam 343-831South Korea

dual-Phase (dP) steels are made of ductile ferrite phase and hard martensite *** it became crucial in progress of automotive industry to save fuel consumption and reduce total weight of vehicles,we need more accurate estimation of distribution to mechanical properties in total amounts of *** steels have considerable difference of mechanical levels in each phase including ferrite and *** is why this study focuses on deconvolution of experimental tensile curve into ferrite and martensite using EBSd for calculation of phase volume fractions and Swift *** for certain parameter of each phase was conducted to produce the deconvolution curves.

关键词： dual phase steel Swift equation EBSd stress-strain partitioning

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A “GC-rich” method for mammalian gene expression:A dominant role of non-coding dNA GC content in the regulation of mammalian gene expression

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Science China(Life Sciences) 2010年第1期53卷 94-100页

作者： Gilbert rishton Matthew (Mizhou) HUI AmProtein Inc NCPC r&d center Harbin Pharmaceutical Group r&d center AmProtein China

High mammalian gene expression was obtained for more than twenty different proteins in different cell types by just a few laboratory scale stable gene transfections for each *** stable expression vectors were constructed by inserting a naturally-occurring 1.006 kb or a synthetic 0.733 kb dNA fragment(including intron) of extremely GC-rich at the 5’ or/and 3’ flanking regions of these protein genes or their gene *** experiment is the first experimental evidence showing that a non-coding extremely GC-rich dNA fragment is a super "chromatin opening element" and plays an important role in mammalian gene *** experiment has further indicated that chromatin-based regulation of mammalian gene expression is at least partially embedded in dNA primary structure,namely dNA GC-content.

关键词： GC-rich GC content dNA structure stable expression mammalian cell expression mechanism

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A-3 dBm rF transmitter front-end for 802.11g application

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Journal of Semiconductors 2013年第4期34卷 69-75页

作者：赵锦鑫颜峻石寅 Suzhou-CAS Semiconductor Integration r&d center

A 2.4 GHz, direct-conversion rF transmitter front-end with an up converter and PA driver is fabricated in a 0.13/zm CMOS process for the reliable transmission of 54 Mb/s OFdM signals. The front-end output power is -3 dBm while the corresponding EVM is -27 dB which is necessary for the 802.11g standard of EVM at-25 dB. With the adopted gain control strategy the output power changes from -14.3 to -3.7 dBm with every step 0.8 dB （20%） which covers the gain variation due to working temperature and process. A power detector indicates the output power and delivers a voltage to the baseband to control the output power.

关键词： 802.11 g rF transmitter front-end up converter rFVGA PA driver EVM

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