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Polygon search algorithm for ultra-compact multifunctional integrated photonics design

Photonics Research 2024年第7期12卷 1527-1541页

作者： TE DU ZHENG PENG peixin HUANG ZHAOJIAN zhang HANSI MA XINPENG JIANG JIE HUANG MINGYU LUO HONGXIN ZOU JUNBO YANG Center of Material Science College of ScienceNational University of Defense TechnologyChangsha 410073China Institute for Quantum Science and Technology College of ScienceNational University of Defense TechnologyChangsha 410073China College of Computer National University of Defense TechnologyChangsha 410073China College of Systems Engineering National University of Defense TechnologyChangsha 410073China Defense Innovation Institute Academy of Military SciencesBeijing 100071China Photonics Research Institute Department of Electrical and Electronic EngineeringThe Hong Kong Polytechnic UniversityHong Kong 999077China Hunan Key Laboratory of Mechanism and Technology of Quantum Information Changsha 410073China

Ultra-compact multifunctional integrated photonic modules have great practical significance to photonic integrated circuits (PICs).However,the design effect and efficiency of the existing mainstream inverse design algorithms are incompetent when designing these *** analyze their shortcomings in this task,and propose a new,to our knowledge,inverse design algorithm named polygon search (PS) algorithm to address these *** utilize the PS algorithm to design an integrated dual-channel mode-conversion-crossing waveguide *** module integrates three functions:interconversion between TE_(0) and TE_(1),interconversion between TE_(0) and TE_(2),and channel crossing within only a 4μm×4μm footprint,and its performance is verified by experimental *** not only greatly reduces the total footprint of many PICs but also greatly improves their fabricating ***,we propose a PS-designed mode mixer and a PS-designed bending waveguide,and connect them with the integrated modules to form a four-channel crossing-mode-division-multiplexing *** system can provide multiple modes on the basis of channel crossing and transmit the output signal in the same direction in parallel within a single output waveguide,which significantly increases the communication bandwidth and decreases the footprint of *** last,we demonstrate the effect and efficiency advantages of the PS algorithm over several mainstream inverse design algorithms by a comprehensive contrast experiment and explain these advantages in theory from several perspectives.

关键词： waveguide mixer algorithm

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Effects of dietary Clostridium butyricum and rumen protected fat on meat quality,oxidative stability,and chemical composition of finishing goats

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Journal of Animal Science and Biotechnology 2024年第2期15卷 911-924页

作者： Meimei zhang Zhiyue zhang Xinlong zhang Changming Lu Wenzhu Yang Xiaolai Xie Hangshu Xin Xiaotan Lu Mingbo Ni Xinyue Yang Xiaoyang Lv peixin Jiao College of Animal Science and Technology Northeast Agricultural UniversityHarbin 150030People’s Republic of China Lethbridge Research and Development Centre Lethbridge T1J 4B1Canada School of Agriculture and Food Sciences The University of QueenslandGattonQLD 4343Australia International Joint Research Laboratory in Universities of Jiangsu Province of China for Domestic Animal Germplasm Resources and Genetic Improvement Yangzhou 225009China

Background Clostridium butyricum(CB)is a probiotic that can regulate intestinal microbial composition and improve meat *** protected fat(RPF)has been shown to increase the dietary energy density and provide essential fatty ***,it is still unknown whether dietary supplementation with CB and RPF exerts beneficial effects on growth performance and nutritional value of goat *** study aimed to investigate the effects of dietary CB and RPF supplementation on growth performance,meat quality,oxidative stability,and meat nutritional value of finishing ***-two goats(initial body weight,20.5±0.82 kg)were used in a completely randomized block design with a 2 RPF supplementation(0 vs.30 g/d)×2 CB supplementation(0 vs.1.0 g/d)factorial treatment *** experiment included a 14-d adaptation and 70-d data and sample collection *** goats were fed a diet consisted of 400 g/kg peanut seedling and 600 g/kg corn-based concentrate(dry matter basis).Result Interaction between CB and RPF was rarely observed on the variables measured,except that shear force was reduced(P<0.05)by adding CB or RPF alone or their combination;the increased intramuscular fat(IMF)content with adding RPF was more pronounced(P<0.05)with CB than without CB *** pH24h(P=0.009),a*values(P=0.007),total antioxidant capacity(P=0.050),glutathione peroxidase activities(P=0.006),concentrations of 18:3(P<0.001),20:5(P=0.003)and total polyunsaturated fatty acids(P=0.048)were increased,whereas the L*values(P<0.001),shear force(P=0.050)and malondialdehyde content(P=0.044)were decreased by adding ***,CB supplementation increased essential amino acid(P=0.027),flavor amino acid(P=0.010)and total amino acid contents(P=0.024)as well as upregulated the expression of lipoprotein lipase(P=0.034)and peroxisome proliferator-activated receptorγ(PPARγ)(P=0.012),and downregulated the expression of stearoyl-CoA desaturase(SCD)(P=0.034).The RPF supplementation increased dry

关键词： Chemical composition Clostridium butyricum Goats Meat quality Oxidative stability Rumen protected fat

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Preparation and Electrochemical Properties of N-doped carbon-coated Si/Sb composite Materials for Lithium-ion Batteries

Preparation and Electrochemical Properties of N-doped carbon...

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第31届全国化学与物理电源学术年会

作者： Wei zhang Xiangzhong Ren Yongliang Li peixin zhang School of Chemistry and Environmental Engineering Shenzhen University

The SiSb/(N-C)x(x=0,1,2,3,4,6) composite anode materials were prepared by by two-step process,including the preparation of Si/Sb composites via mechanical ball milling and then the preparation of Si/Sb/PANI using in situ polymerization of aniline in the suspension of Si/Sb nanoparticles followed by the carbonization *** microstnictures,morphologies were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM) and the electrochemical performances were investigated by constant current charging-discharging,cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS).The initial charge and discharge specific capacities of the synthesized SiSb/(N-C) composite anode material were934.4mAh/g and 764.9 mAh/g,respectively,while the initial columbic efficiency was 81.86%.The capacity remained at 669.5 mAh/g after 50 cycles and the capacity retention ratio was 71.65%,which demonstrated excellent electrochemical performance.

关键词： lithium-ion batteries SiSb0.8/(N-C)x composite materials electrochemical properties

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Pyrimidine donor induced built-in electric field between melon chains in crystalline carbon nitride to facilitate excitons dissociation

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Chinese Chemical Letters 2023年第3期34卷 546-552页

作者： Guoqiang zhang Yangsen Xu Guoshuai Liu Yongliang Li Chuanxin He Xiangzhong Ren peixin zhang Hongwei Mi College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China Guangdong Flexible Wearable Energy and Tools Engineering Technology Research Centre Shenzhen University Shenzhen 518060China Research Centre for Information Technology Shenzhen Institute of Information TechnologyShenzhen 518172China School of Environmental and Civil Engineering Jiangnan UniversityWuxi 214122China

The strong intrinsic Coulomb interactions of Frenkel excitons in crystalline carbon nitride(CCN) greatly limits their dissociation into electrons and holes, resulting in unsatisfactory charges separation and photocatalytic efficiency. Herein, we propose a strategy to facilitate excitons dissociation by molecular regulation induced built-in electric field(BIEF). The electron-rich pyrimidine-ring into CCN changes the charge density distribution over heptazine-rings to induce BIEF between melon chains. Such BIEF is sufficient to overcome the considerable exciton binding energy(EBE) and reduce it from 38.4 meV to 16.4 meV,increasing the excitons dissociation efficiency(EDE) from 21.5% to 51.9%. Our results establish a strategy to facilitate excitons dissociation through molecular regulation induced BIEF, targeting the intrinsic high EBE and low EDE of polymer photocatalysts.

关键词： Crystalline carbon nitride Exciton binding energy Built-in electric field Pyrimidine donor Excitons dissociation

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A high-volumetric-capacity bismuth nanosheet/graphene electrode for potassium ion batteries

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Science China Materials 2020年第10期63卷 1920-1928页

作者： Linchao Zeng Minsu Liu Peipei Li Guangmin Zhou peixin zhang Ling Qiu Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen InstituteTsinghua UniversityShenzhen 518055China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China

Potassium ion batteries(PIBs)with high-volumetric energy densities are promising for next-generation low-cost energy storage *** bismuth(Bi)with a structure similar to graphite,is a promising anode material for PIBs due to its high theoretical volumetric capacity(3763 mA h cm^−3)and relatively low working potential(−2.93 V *** hydrogen electrode).However,it experiences severe capacity decay caused by a huge volume expansion of Bi when alloying with *** study reports a flexible and free-standing Bi nanosheet(BiNS)/reduced graphene oxide composite membrane with designed porosity close to the expansion ratio of BiNS after *** controlled pore structure improves the electron and ion transport during cycling,and strengthens the structural stability of the electrode during potassiation and depotassiation,leading to excellent electrochemical performance for potassium-ion *** particular,it delivers a high reversible volumetric capacity of 451 mA h cm^−3 at the current density of 0.5 A g^−1,which is much higher than the previously reported commercial graphite material.

关键词： potassium ion batteries high volumetric energy density bismuth nanosheet controlled pore structure graphite

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受面内载荷的层压复合材料的层间应力分析

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机械强度 2006年第2期28卷 224-228页

作者：张培新李亚智西北工业大学航空学院航空结构工程系西安710072

研究任意多向铺层层压复合材料层间应力的有限元分析方法。分别考虑两种建模方法,一种是采用8结点等参实体单元逐层进行离散化,每个子层都视为正交异性材料;另一种方法是在子层面内采用4结点板元进行离散化,而在层间采用刚性元和弹簧元... 详细信息

研究任意多向铺层层压复合材料层间应力的有限元分析方法。分别考虑两种建模方法,一种是采用8结点等参实体单元逐层进行离散化,每个子层都视为正交异性材料;另一种方法是在子层面内采用4结点板元进行离散化,而在层间采用刚性元和弹簧元进行离散化,称为准三维模型。计算实例为两种不同铺层的T300QY8911碳纤维双马树脂层压板条,其中一个板条连续,另一个含圆孔,均受到面内拉伸载荷作用。采用的计算软件为***。计算结果表明,在受拉板条的自由边和孔口附近存在不能忽视的层间应力。两种建模方法有各自的特点,计算结果可以互相印证,而后一种方法更加灵活和有更广泛的适应性。

关键词：复合材料层压板层间应力有限元分析建模方法

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山楂叶总黄酮对2型糖尿病大鼠胰腺组织保护作用的研究

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中药药理与临床 2015年第5期31卷 72-75页

作者：张鹏张培新邯郸钢铁集团有限责任公司职工医院邯郸056001

目的:研究山楂叶总黄酮(Hawthorn leaves favonoids,HLF)对2型糖尿病大鼠胰腺组织的保护作用。方法:通过高脂高糖饮食加腹腔注射链脲佐菌素(STZ)诱导的方法制备2型糖尿病大鼠模型,选取60只随机分为:模型对照组,山楂叶总黄酮(50、100、20... 详细信息

目的:研究山楂叶总黄酮(Hawthorn leaves favonoids,HLF)对2型糖尿病大鼠胰腺组织的保护作用。方法:通过高脂高糖饮食加腹腔注射链脲佐菌素(STZ)诱导的方法制备2型糖尿病大鼠模型,选取60只随机分为:模型对照组,山楂叶总黄酮(50、100、200mg/kg)治疗组和盐酸二甲双胍(200mg/kg)阳性对照组;另取12只同龄大鼠作为正常对照组。分别于给药第0、2、4、6周检测空腹血糖和胰岛素水平;给药治疗6周后,通过HE染色观察胰腺组织病理形态学改变,并通过TUNEL染色观察胰腺细胞凋亡状况并计算凋亡指数(Apoptosis Index,AI),测定胰腺组织匀浆中抗氧化酶(SOD、GSH-Px、CAT)活性及MDA含量。结果:与模型组对照组相比,山楂叶总黄酮(100、200mg/kg)治疗组大鼠胰岛素水平显著升高、血糖水平显著降低,胰腺组织中SOD、CAT活性显著升高MDA含量显著降低,其中200mg/kg治疗组胰腺组织中GSH-Px活性显著升高,差异均具有统计学意义;山楂叶总黄酮治疗组胰腺组织病变和胰岛细胞凋亡均明显改善,其中以200mg/kg治疗组效果最为显著,且200mg/kg治疗组胰岛细胞凋亡率显著降低。结论:山楂叶总黄酮能够有效改善胰腺组织病变、抑制胰岛细胞凋亡,提高胰岛素分泌、降低血糖,改善胰腺组织抗氧化酶活性、降低氧化应激损伤,提示山楂叶总黄酮对2型糖尿病大鼠胰腺组织具有剂量依赖性的保护作用。

关键词：山楂叶总黄酮糖尿病胰腺保护

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山楂叶总黄酮对2型糖尿病大鼠的保护作用

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中药药理与临床 2015年第4期31卷 114-117页

作者：张鹏张培新邯郸钢铁集团有限责任公司职工医院邯郸056001

目的 :研究山楂叶总黄酮(Hawthorn Leaves Favonoids,HLF)对2型糖尿病大鼠的保护作用。方法:通过高脂高糖饲料饮食和腹腔注射链脲佐菌素(STZ)诱导2型糖尿病大鼠模型,选取60只大鼠模型随机分为:模型对照组、山楂叶总黄酮(50、100和200mg/... 详细信息

目的 :研究山楂叶总黄酮(Hawthorn Leaves Favonoids,HLF)对2型糖尿病大鼠的保护作用。方法:通过高脂高糖饲料饮食和腹腔注射链脲佐菌素(STZ)诱导2型糖尿病大鼠模型,选取60只大鼠模型随机分为:模型对照组、山楂叶总黄酮(50、100和200mg/kg)治疗组和盐酸二甲双胍(200mg/kg)治疗组,并另取12只同龄大鼠作为正常对照组。分别于给药前和给药后每周测定各组大鼠空腹血糖和胰岛素水平。治疗6周后,称量各组大鼠体重;测定各组大鼠血清中血脂监测指标:总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C);测定血清中氧化应激损伤监测指标:超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、过氧化氢酶(CAT)活性,总抗氧化能力(T-AOC)水平以及丙二醛(MDA)含量。结果:与模型对照组相比,山楂叶总黄酮100和200mg/kg治疗组大鼠胰岛素水平显著升高,体重显著降低,血清中TC、TG、LDL-C含量显著降低,SOD、CAT活性显著升高,MDA含量显著降低,差异均具有统计学意义;山楂叶总黄酮200mg/kg治疗组大鼠空腹血糖水平显著降低,血清中HDL-C含量显著升高,GSH-Px活性和T-AOC水平显著升高,差异均具有统计学意义。结论:山楂叶总黄酮能够有效降低2型糖尿病大鼠血糖、改善血脂,提高机体抗氧化能力、抑制氧化应激损伤,提示山楂叶总黄酮对2型糖尿病大鼠具有保护作用。

关键词：山楂叶总黄酮糖尿病保护

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“中国竹乡”竹产业考察报告

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竹子研究汇刊 2009年第3期28卷 1-4,9页

作者：张培新安吉县林业局浙江安吉313300

笔者走访、考察了30个"中国竹乡",简介了行程内容及竹乡的竹产业概况,提出了竹产业是一项富民产业,只有全民参与才能充分发挥其经济、社会和生态效益;分析地域特点,发挥"中国竹乡"优势,带动周边地区发展;研究产业发展规律,加强东部和中... 详细信息

笔者走访、考察了30个"中国竹乡",简介了行程内容及竹乡的竹产业概况,提出了竹产业是一项富民产业,只有全民参与才能充分发挥其经济、社会和生态效益;分析地域特点,发挥"中国竹乡"优势,带动周边地区发展;研究产业发展规律,加强东部和中西部地区交流合作;因地因时而异,重视科技普及和新技术推广,推进竹产业发展;积极鼓励其它行业的人才和资金的参与,做大做强竹产业;政府重视,部门支持,为竹产业的发展领航护航等观点和建议。

关键词：中国竹乡考察建议

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联合重采样的并行双反馈时频域符号定时恢复算法

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通信学报 2023年第4期44卷 15-26页

作者：张沛鑫张南王大庆吴桐李哲宫丰奎西安电子科技大学空天地一体化综合业务网全国重点实验室陕西西安710071 西安空间无线电技术研究所陕西西安710100

针对现有符号定时恢复实现算法难以兼顾大吞吐量、高收敛精度和强抗定时误差算法能力的问题,提出一种联合重采样的高速并行定时恢复算法,利用双反馈环实现定时频偏和定时相偏的纠正。在设计并行重采样时,提出并行数控振荡器的实现方式... 详细信息

针对现有符号定时恢复实现算法难以兼顾大吞吐量、高收敛精度和强抗定时误差算法能力的问题,提出一种联合重采样的高速并行定时恢复算法,利用双反馈环实现定时频偏和定时相偏的纠正。在设计并行重采样时,提出并行数控振荡器的实现方式以及利用使能排序和移位寄存器的方式来实现数据重排序。在进行定时恢复环路设计时,分析并推导O&M定时误差估计算法的并行实现结构,在对定时相/频偏纠正原理分析的基础上提出环路纠正的设计方法和实现结构。FPGA实测结果表明,所提算法能够实现最高64APSK调制信号4~16倍任意倍符号率的符号定时恢复,且与理想信号的误差向量幅度(EVM)在4%以内,满足宽带卫星通信需求。

关键词：宽带卫星通信符号定时恢复双反馈并行实现

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