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Growth performance,serum parameters,inflammatory responses,intestinal morphology and microbiota of weaned piglets fed 18%crude protein diets with different ratios of standardized ileal digestible isoleucine to lysine

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Animal Nutrition 2024年第1期16卷 313-325页

作者： Jian Wang sujie liu Jiayu Ma Xiaoli Dong Shenfei Long Xiangshu Piao State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Beijing Jingwa Agricultural Science and Technology Innovation Center Beijing101206China CJ International Trading Co. LtdShanghai 201107China

The present study was to explore the Ile requirement of piglets fed 18%crude protein(CP)*** hundred and fifty 28-day-old Duroc×Landrace×Yorkshire piglets(8.37±1.92 kg)were randomly divided into 5 dietary treatments(10 piglets per replicate,5 barrows and 5 gilts per replicate)with 45%,50%,55%,60%,65%standardized ileal digestible(SID)Ile-to-Lys ratios,and the SID Lys was formulated to1.19%.The experimental design consisted of two phases(d 1 to 14 and d 15 to 28).Results showed that average daily gain(ADG)had a tendency to quadratically increase as the SID Ile-to-Lys ratio increased(P=0.09),and the optimum SID Ile-to-Lys ratios required to maximize ADG were 48.33%and 54.63%for broken-line linear model and quadratic polynomial model,*** SID Ile-to-Lys ratios had no significant effects on average daily feed intake and gain-to-feed *** matter(P<0.01),CP(P=0.01),ether extract(P=0.04),gross energy(P<0.01)and organic matter(P<0.01)digestibility increased *** total cholesterol levels decreased linearly(P=0.01)and quadratically(P<0.01);aspartate aminotransferase(P<0.01),interleukin-1β(P=0.01),and tumor necrosis factor-a(P<0.01)levels decreased quadratically;immunoglobulin G(P=0.03)and immunoglobulin M(P=0.01)concentrations increased *** Ser levels decreased linearly(P<0.01)and quadratically(P=0.01);Glu(P=0.02),Arg(P=0.05),and Thr(P=0.03)levels decreased quadratically;Gly(P<0.01)and Leu(P=0.01)levels decreased linearly;Ile(P<0.01)concentration increased *** villus height(P<0.01)and villus height to crypt depth ratio(P<0.01)increased *** deficiency or excess of Ile decreased short chain fatty acid-producing bacteria abundance and increased pathogenic bacteria ***,taking ADG as the effect index,the optimum SID Ile-to-Lys ratios of piglets offered 18%CP diets were 48.33%and 54.63%based on two different statistical models,respectively,and the deficiency or excess of lle negative

关键词： Weaned piglet Growth performance Intestinal health Isoleucine Reduced crude protein diet

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一种M进制短参考置换索引的差分混沌移位键控系统

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半导体光电 2024年第3期45卷 485-492页

作者：柳粟杰杨烈君谢肇鹏宁德师范学院信息工程学院福建宁德352100 福州大学先进制造学院福建泉州362251

为解决置换索引的差分混沌移位键控(PI-DCSK)通信系统存在能量效率低的问题,结合短参考技术,提出了一种M进制短参考置换索引的差分混沌移位键控(SR-PI-DCSK)系统。该系统将参考时隙的混沌序列缩短至小于半个符号周期,信息时隙将参考时... 详细信息

为解决置换索引的差分混沌移位键控(PI-DCSK)通信系统存在能量效率低的问题,结合短参考技术,提出了一种M进制短参考置换索引的差分混沌移位键控(SR-PI-DCSK)系统。该系统将参考时隙的混沌序列缩短至小于半个符号周期,信息时隙将参考时隙的置换排列副本进行复制并拼接P次,在不增加PI-DCSK系统结构复杂度及维持相同的恢复比特信息所需能量的情况下,可以有效提高系统能量效率,同时提升系统的误比特率(BER)。然后,分析了SR-PIDCSK系统的能量效率,推导了其在多径瑞利衰落信道环境下的BER表达式,使用蒙特-卡罗模拟仿真验证了该理论推导的正确性。仿真结果表明,在同一条件下,所提出的系统与PI-DCSK系统相比具有更好的性能增益,这能为下一代物联网短距离通信应用提供一种混沌调制方案。

关键词：差分混沌移位键控短参考置换索引能量效率

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纤维杂质对油纸复合绝缘局部放电特性影响研究

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四川电力技术 2024年第3期47卷 65-71页

作者：史强王睿晗刘苏婕国网四川省电力公司营销服务中心四川成都610065

为研究纤维杂质对油纸绝缘局部放电特性的影响,搭建了直流油纸绝缘实验平台,观测了油中纤维杂质产生及成桥过程,就杂质成桥的动力学基础进行了分析,并对杂质影响下的油纸绝缘局部放电频数、平均放电量及最大放电量等特征参数进行了研究... 详细信息

为研究纤维杂质对油纸绝缘局部放电特性的影响,搭建了直流油纸绝缘实验平台,观测了油中纤维杂质产生及成桥过程,就杂质成桥的动力学基础进行了分析,并对杂质影响下的油纸绝缘局部放电频数、平均放电量及最大放电量等特征参数进行了研究。结果表明,直流电压下纤维杂质在油中受电场力、重力、浮力及油黏性阻力作用。当杂质所在处场强大于2.12×105 V/m时,纤维杂质以缓慢速度向高压电极运动,且沿电压梯度最大方向成桥;纤维杂质畸变电场可使油纸绝缘局部放电频数上升、放电量下降。进一步实验表明,纤维小桥可导致油隙内泄漏电流增加,引起局部发热,并使油中水分局部气化为微小气泡。直流电压下低电导率气泡承担较强电场,先于变压器油发生放电,宏观表现为更加密集且强度较低的局部放电。

关键词：直流电压油纸绝缘纤维杂质局部放电

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Impact of sugar beet pulp and wheat bran on serum biochemical profile,inflammatory responses and gut microbiota in sows during late gestation and lactation

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Journal of Animal Science and Biotechnology 2021年第4期12卷 1370-1383页

作者： Qinghui Shang sujie liu Hansuo liu Shad Mahfuz Xiangshu Piao State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityNo.2 Yuanmingyuan West RoadBeijing 100193China

Background:Sows are frequently subjected to various stresses during late gestation and lactation,which trigger inflammatory response and metabolic *** fiber can influence animal health by modulating gut microbiota and their by-products,with the effects depending upon the source of the dietary *** study aimed to evaluate the impacts of different fiber sources on body condition,serum biochemical parameters,inflammatory responses and fecal microbiota in sows from late gestation to ***:Forty-five multiparous sows(Yorkshire×Landrace;3–6 parity)were assigned to 1 of 3 dietary treatments from d 85 of gestation to the end of lactation(d 21 post-farrowing):a control diet(CON,a corn-soybean meal diet),a sugar beet pulp diet(SBP,20%SBP during gestation and 10%SBP during lactation),and a wheat bran diet(WB,30%WB during gestation and 15%WB during lactation).Results:Compared with CON,supplementation of SBP decreased(P<0.05)lactation BW loss,reduced(P<0.05)serum concentration of total cholesterol,non-esterified fatty acids,interleukin-6 and tumor necrosis factor-α,and increased(P<0.05)fecal water content on d 110 of gestation and d 21 of lactation,while supplementation of WB reduced(P<0.05)serum concentration of total cholesterol on d 110 of gestation,increased(P<0.05)fecal water content and decreased(P<0.05)serum interleukin-6 concentration on d 110 of gestation and d 21 of *** addition,sows fed SBP had lower(P<0.01)abundance of Clostridium_sensu_stricto_1 and Terrisporobacter than those fed CON,but had greater(P<0.05)abundance of Christensenellaceae_R-7_group and Ruminococcaceae_UCG-002 than those fed the other two diets on d 110 of *** d 21 of lactation,supplementation of SBP decreased(P<0.05)the abundance of Firmicutes and Lactobacillus,but enriched(P<0.05)the abundance of Christensenellaceae_R-7_group,Prevotellaceae_NK3B31_group,Ruminococcaceae_UCG-002,Prevotellaceae_UCG_001 and unclassified_f__Lachnospiraceae compared with

关键词： Dietary fiber source Gut microbiota Inflammatory response Serum biochemical profile Sow

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Natural capsicum extract replacing chlortetracycline enhances performance via improving digestive enzyme activities,antioxidant capacity,anti-inflammatory function,and gut health in weaned pigs

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Animal Nutrition 2021年第2期7卷 305-314页

作者： Shenfei Long sujie liu Jian Wang Shad Mahfuz Xiangshu Piao State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing100193China

The objective of this study was to investigate the effects of natural capsicum extract(NCE,containing 2%natural capsaicin,the rest is carrier)replacing chlortetracycline(CTC)on performance,digestive enzyme activities,antioxidant capacity,inflammatory cytokines,and gut health in weaned pigs.A total of 108 weaned pigs(Duroc×[Landrace×Yorkshire],initial body weight-8.68±1.34 kg;weaned on d 28)were randomly allotted into 3 treatments with 6 replicate pens per treatment(3 barrows and 3 gilts per pen).The treatments include a corn-soybean meal basal diet as a control group(CON),a CTC group(basal diet+CTC at 75 mg/kg),and a NCE group(basal diet--NEC at 80 mg/kg).Compared with CON and CTC,NCE had increased(P<0.05)average daily gain in phase 2(d 15 to 28)and overall(d 1 to 28),and higher(P<0.05)apparent total tract digestibility of gross energy,dry matter,crude protein,and organic matter in phase 1(d 1 to 14).These pigs also had increased(P<0.05)pancrelipase activity in pancreas,α-amylase,lipase and protease activities in the jejunal mucosa,and lipase activity in the ileal mucosa on d ***,NCE had increased(P<0.05)the contents of growth hormone,β-endorphin,5-hydroxytryptamine,total antioxidant capacity,total superoxide dismutase,catalase,and IL-10,as well as decreased(P<0.05)contents of malondialdehyde,tumor nuclear factor-a,interferon-y,and interleukin-6 in serum on d 28 compared with CON and *** showed higher(P<0.05)propionic acid,butyric acid and total volatile fatty acids(VFA)contents,and increased(P<0.05)relative abundance of Faecalibacterium in colon,as well as higher(P<0.05)propionic acid and total volatile fatty acids in cecum on d 28 compared with *** conclusion,NCE replacing CTC could enhance performance via improving digestive enzyme activities,antioxidant capacity,anti-inflammatory function,gut VFA composition and microbiota community in weaned pigs,and it could be used as a potential target for the development of feed additives.

关键词： Antioxidant capacity Chlortetracycline Natural capsicum extract Performance Weaned pig

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母亲正念养育对小学生心理弹性的影响:母子关系和积极情感的链式中介作用

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中国健康心理学杂志 2024年第3期32卷 328-333页

作者：刘苏洁王玉正郭建友中国科学院心理研究所中国科学院心理健康重点实验室北京100101 中国科学院大学心理学系华东师范大学心理与认知科学学院上海市心理健康与危机干预重点实验室

目的:探讨母亲正念养育对小学生心理弹性的影响,为提高儿童的心理弹性水平提供参考。方法:采用正念养育量表、母子关系量表、心理弹性量表、积极和消极情感量表对331名小学生和他们的母亲进行问卷调查。结果:①相关分析表明,母亲正念养... 详细信息

目的:探讨母亲正念养育对小学生心理弹性的影响,为提高儿童的心理弹性水平提供参考。方法:采用正念养育量表、母子关系量表、心理弹性量表、积极和消极情感量表对331名小学生和他们的母亲进行问卷调查。结果:①相关分析表明,母亲正念养育与心理弹性、母子关系、积极情感显著正相关(r=0.42,0.28,0.37;P<0.001);母子关系、积极情感与心理弹性呈显著正相关(r=0.59,0.49;P<0.001)。②中介分析显示,母亲正念养育不仅直接影响小学生心理弹性(95%CI:0.01~0.18),而且还存在3条间接路径:母子关系的中介作用(95%CI:0.12~0.25);积极情感的中介作用(95%CI:0.02~0.10);母子关系、积极情感的链式中介作用(95%CI:0.02~0.06)。结论:母亲正念养育不仅直接影响小学生心理弹性水平,也可以通过母子关系和积极情感的独立中介及二者的链式中介间接作用于小学生心理弹性。

关键词：母亲正念养育母子关系积极情感心理弹性小学生

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Mixed organic acids as an alternative to antibiotics improve serum biochemical parameters and intestinal health of weaned piglets

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Animal Nutrition 2021年第3期7卷 737-749页

作者： Jiayu Ma Xiangshu Piao Qinghui Shang Shenfei Long sujie liu Shad Mahfuz State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China

The primary aim of this experiment was to critically explore the relationship between the different levels of mixed organic acids(MOA)and growth performance,serum antioxidant status and intestinal health of weaned piglets,as well as to investigate the potential possibility of MOA alternative to antibiotics growth promoters(AGP).A total of 180 healthy piglets(Duroc×[Landrace×Yorkshire];weighing 7.81±1.51 kg each,weaned at d 28)were randomly divided into 5 treatments:1)basal diet(CON);2)CON+chlorinomycin(75 mg/kg)+virginiamycin(15 mg/kg)+guitaromycin(50 mg/kg)(AGP);3)CON+MOA(3,000 mg/kg)(OA1);4)CON+MOA(5,000 mg/kg)(OA2);5)CON+MOA(7,000 mg/kg)(OA3).This study design included 6 replicates per treatment with 6 piglets per pen(barrow:gilt=1:1)and the experiment was separated into phase 1(d 1 to 14)and phase 2(d 15 to 28).In phases 1,2 and overall,compared with the CON,the feed conversion ratio(FCR)was reduced(P<0.01)and the average daily gain(ADG)was increased(P<0.05)in piglets supplemented with AGP,OA1 and *** con-centration of serum immunoglobulins G(IgG)was improved(P<0.05)in piglets supplemented with OA2 in phase *** the jejunum and ileum,the villus height:crypt depth ratio was significantly increased(P<0.01)in piglets fed AGP and *** mRNA expression level of claudin-1 and zonula occludens-1(ZO-1)(P<0.01)was up-regulated in piglets supplemented with OA1 and *** piglets fed AGP,OA1 and OA2 showed an increase(P<0.05)in the content of acetate acid and total volatile fatty acids(TVFA)in the cecum,and butyric acid and TVFA in the colon compared with ***,OA1 lowered(P<0.05)the content of Lachnospiraceae in *** results demonstrated that MOA at 3,000 or 5,000 mg/kg could be an alternative to antibiotics due to the positive effects on performance,immune parameters,and intestinal health of weaned ***,from the results of the quadratic fitting curve,it is inferred that MOA at a dose of 4,000 mg/kg may produce a better effect.

关键词： Weaned piglet Organic acid Growth performance Intestinal health

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The relationships between urban-rural temperature difference and vegetation in eight cities of the Great Plains

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Frontiers of Earth Science 2019年第2期13卷 290-302页

作者： Yaoping CUI Xiangming XIAO Russell B DOUGHTY Yaochen QIN sujie liu Nan LI Guosong ZHAO Jinwei DONG Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions Henan UniversityKaifeng 475004China Department of Microbiology and Plant Biology Center for Spatial AnalysisUniversity of OklahomaNormanOK 73019USA Ministry of Education Key Laboratory of Biodiversity Science and Ecological Engineering Institute of Biodiversity ScienceFudan UniversityShanghai 200438China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China

Interpreting the relationship between urban heat island (UHI) and urban vegetation is a basis for understanding the impacts of underlying surfaces on UHL The calculation of UHI intensity (UHII) requires observations from paired stations in both urban and rural *** to the limited number of paired meteorological stations,many studies have used remotely sensed land surface temperature,but these time-series land surface temperature data are often heavily affected by cloud cover and other *** factors,together with the algorithm for inversion of land surface temperature,lead to accuracy problems in detecting the UHII,especially in cities with weak *** on meteorological observations from the Oklahoma Mesonet,a world-class network,we quantified the UHII and trends in eight cities of the Great Plains,USA,where data from at least one pair of urban and rural meteorological stations were *** examined the changes and variability in urban temperature,UHII,vegetation condition (as measured by enhanced vegetation index,EVI),and evapotranspiration (ET).We found that both UHI and urban cold islands (UCI) occurred among the eight cities during 2000-2014 (as measured by impervious surface area).Unlike what is generally considered,UHII in only three cities significantly decreased as EVI and ET increased (p < 0.1),indicating that the UHI or UCI cannot be completely explained simply from the perspective of the underlying *** vegetative cover (signaled by EVI) can increase ET,and thereby effectively mitigate the *** study station clearly showed that the underlying surface or vegetation affects urban-rural temperature,and that these factors should be considered during analysis of the UHI effect over time.

关键词： urbanization evapotranspiration urban cold island background climate air temperature

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Endogenous chitinase might lead to differences in growth performance and intestinal health of piglets fed different levels of black soldier fly larva meal

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Animal Nutrition 2023年第3期14卷 411-424页

作者： sujie liu Jian Wang Longxian Li Yonggai Duan Xiaolin Zhang Tenghao Wang Jianjun Zang Xiangshu Piao Yongxi Ma Defa Li State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityNo.2 Yuanmingyuan West RoadBeijing100193China Bennong Agricultural Technology Co. Ltd.Zhengzhou450045China Zhejiang Qinglian Food Co. LtdJiaxing314399China

This study aimed to investigate the effects of different levels of black soldier fly(BSF)replacing soybean meal(SBM)in diets on the performance and health condition of piglets.A total of 180 weaned piglets were allocated into 5 treatments:BSF0(corn-soybean meal basal diet),BSF25(BSF replacing 25%SBM),BSF50(BSF replacing 50%SBM),BSF75(BSF replacing 75%SBM)and BSF100(BSF replacing 100%SBM).During the whole period,in comparison with BSF0,average daily gain(ADG)and average daily feed intake increased in the BSF25 and BSF50 groups,whereas ADG decreased in the BSF75 and BSF100groups(P<0.05).The result of quadratic fitting curve showed that piglets exhibited the highest ADG when BSF replaced around 20%*** with BSF0,organic matter and dry matter digestibility improved in the BSF25 group,whereas ether extract digestibility decreased in the BSF100 group(P<0.05).In comparison with BSF0,piglets from the BSF25 group showed a higher duodenal ratio of villus height to crypt depth,increased jejunal sucrase activity,serum neuropeptide Y and ghrelin levels,elevated ileal immunoglobulin(Ig)A,Ig G and Ig M contents and a lower leptin level,and piglets from the BSF100 group exhibited an increased relative weight of kidney(P<0.05).However,no significant differences were observed in the expression level of tight junction proteins and chitin-degrading ***,compared with BSF0,the abundance of short chain fatty acid producing bacteria such as Ruminococcaceae,Faecalibacterium and Butyricicoccus increased,and potential pathogenic bacteria decreased in piglets from the BSF25 group,whereas piglets from the BSF100 group had a greater abundance of harmful *** conclusion,BSF replacing 25%SBM in diets could improve digestive parameters,immune function and intestinal microbiota,and thus improved growth performance of ***,BSF replacing 100%SBM showed an adverse effect on piglet performance,and the reason might be related to the limited amount of chitin-degra

关键词： Black soldier fly Supplementation level Endogenous chitinase Gut microbiota Weaned pigs

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Adaptive Backstepping Sliding Mode Controller Design Based on "H" Type Quadrotor

Adaptive Backstepping Sliding Mode Controller Design Based o...

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第36届中国控制会议

作者： Linqi Zhang Jianan Wu sujie liu Changqing Wang Aijun Li School of Automation Northwestern Polytechnical University

A 6DOF mathematical model of the "H" type quadrotor prototype is developed by the Newton-Euler method to analyze the complex nonlinear position and attitude control problems in this *** the PID controllers are designed for the control of the horizontal position of the *** adaptive backstepping sliding mode controllers are designed for the altitude and attitude control of the quadrotor and the stability is proved based on Lyapunov ***,simulation is carried out under the MATLAB/*** simulation results show that the controllers we designed can effectively realize the control of the quadrotor model,and the method has good tracking and anti-interference ability.

关键词： quadrotor adaptive control backstepping sliding mode control

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