摘要：The coronary artery calcification score and pericardial fat volume have recently been reported to be strongly associated with the severity and presence of coronary atherosclerosis. However, no studies have explored the outcome of phased progression of atherosclerosis by non-contrast computed tomography in asymptomatic people in China. The population-based cohort study in outcome of phased progression of atherosclerosis in China （PERSUADE）, an observational, longitudinal and prospective cohort study in a target population of healthy sub- jects based in Jidong Oilfield （China）, prospectively analyzes the outcome of phased progression of atherosclerosis by non-contrast computed tomography in healthy population. The results of this study are expected to be of value for utilizing noninvasive imaging combine with tradi- tional cardiovascular risk factors to create a risk stratification and find pertinent biomarkers associated with the outcome of phased progres- sion of atherosclerosis in healthy people, thereby could help to establish a more personalized treatment of clinical practice.

摘要：为了提高TMS320F2833x系列DSP芯片程序烧写和加载的便利性,设计了一种基于TM4C129x系列ARM芯片的网络加载方法,介绍了具体的硬件电路和软件程序设计方法。测试结果表明,该方法可以通过网络远程对TMS320F2338x系列DSP芯片进行程序的加载升级,大幅提高了DSP芯片程序加载的灵活性,具有很强的实用价值。

摘要：为了实现对交流永磁同步电机的高性能控制,设计了一种基于数字信号处理器(DSP)和智能功率模块(IPM)的全数字交流伺服驱动器。主要介绍了该驱动器的基本原理、伺服控制单元的硬件设计方案和软件实现流程。实验结果表明,所设计的驱动器能够在控制参数不变的情况下驱动电机稳定跟踪阶跃信号和正弦信号,并具有很好的动态性能和稳态精度。

摘要：EtherCAT总线由德国Beckhoff公司提出,是目前速度最快的工业以太网系统,目前众多EtherCAT相关产品及方案已经在自动化领域得到推广和应用。本文提出了一种基于LAN9252和STM32F732芯片的EtherCAT从站实现方法,介绍了具体的硬件电路和软件程序设计方法。

摘要：分蘖角度是青稞株型的主要构成因素,在提高青稞产量与抗倒伏性中发挥着极为重要的作用。为解析青稞分蘖角度的遗传机制,本研究以青稞品种‘达章紫’(株型松散)和‘昆仑10号’(株型紧凑)为亲本构建的RIL群体为材料,基于高密度遗传图谱,在多环境中进行青稞分蘖角度的QTL定位,并利用RIL群体衍生的剩余杂合系,对鉴定到的主效QTLqTA7H-1进行精细定位。在青稞7条染色体上共检测到9个控制分蘖角度的QTL,解释表型变异为6.41%~33.57%,其中,qTA3H-1和qTA7H-1为多环境共检测的主效QTL,平均加性效应分别为5.42°(增效)和-3.87°(减效);在减效QTL qTA7H-1初定位区间筛选到4个剩余杂合体,自交衍生F8:9近等基因系,在置信区间内加密设计14对分子标记对RHL群体极端单株进行检测,利用获得的5种交换类型单株,将qTA7H-1进一步界定在PC08(32,252,397)与PA10(41,790,765)约9.54Mb的物理区间内。本研究初步揭示调控青稞分蘖角度的遗传因子,为开展分蘖角度性状的遗传改良与分子设计育种奠定了基础。

摘要：教育教学数字化转型正在推动线上线下混合式教学模式下的教师教学整改与质量提升,促进高职学生自主性个性化学习。本研究借助Citespace软件和熵权评价方法,总结对比国内外混合式教学的研究现状并梳理研究发展脉络。结果表明:国内外混合式教学研究过程都经历了“萌芽—成长—发展”3个阶段;国内外研究热点均是“线上教学”“教学策略”等;国内研究主要偏向于宏观层面的策略等理论研究,国外研究主要涉及医学等技术性学科领域的微观层面和中观层面。面临中国式教育现代化发展的需求,未来的混合式教学要注重混合式教学与人工智能的融合创新、深化混合式教学模式改革与融合发展、加强混合式教学微观层面的研究、开展混合式教学课程设计和实践。

摘要：[目的]探究辣椒油树脂(oleoresin capsicum, OC)对育肥牛血清生化、免疫及抗氧化指标的影响,为辣椒油树脂在育肥牛饲养生产中的应用提供理论依据。[方法]选取体况良好、月龄相近(15.5±0.5)、体重相近(484.73 kg±48.42 kg)的西门塔尔牛杂交牛48头,采用随机区组设计分为4组,每组12个重复,每个重复1头牛。对照组牛饲喂牛场原有饲粮;试验Ⅰ、Ⅱ、Ⅲ组牛在牛场原有饲粮基础上分别添加4、8和12 g/d辣椒油树脂。预试期7 d,正试期90 d。试验结束后采集血样,测定血清生化、免疫和抗氧化指标。[结果]与对照组相比,(1)试验Ⅱ组牛血清中总蛋白(TP)和白蛋白(ALB)含量显著增加(P0.05)。(3)试验Ⅰ、Ⅱ组牛血清中总抗氧化能力(T-AOC)及超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活性均显著增加(P0.05)。[结论]饲粮中添加适量辣椒油树脂可在一定程度上提高育肥牛机体的抗氧化力和免疫力。本试验条件下,在育肥牛饲粮中添加8 g/d辣椒油树脂时提高机体抗氧化力和免疫力的效果最佳。

摘要：In searching for novel fungicidal leads,a series of pyrazole-containing strobilurins were rationally designed,synthesized and *** indicated that compound 1-7 displayed excellent fungicidal activity against a broad spectrum of plant pathogens such as Gibberella zeae,Rhizoctonia cereolis,Sclerotinia sclerotiorum,Phytophthora infestans,Physolosporo piricola and Pellicularia sosakii with EC_(50) of 0.16,0.02,0.72,0.07,0.77 and 0.65μg/mL,respectively,which were 3-10 times more potent than the positive control azoxystrobin against the corresponding ***,like azoxystrobin and kresoxim methyl,1-7,displayed excellent protec-tive activity against *** docking validated that 1-7 and azoxystrobin would share a similar binding mode with cytochrome bc_(1) *** study demonstrates that 1-7 is a promising fungicidal candidate for further development.

摘要：Based on the d-electron alloy design method and the average valence electron concentration theory,three kinds of metastable b-type Ti–35Nb-based alloys containing different quantities of Sn, Zr, and Mo alloying elements were designed, whose —Md = 2.45 e V and e/a = 4.24, and —Bo values = 2.869, 2.866, and 2.860,respectively. Meanwhile, a formula for predicting the solid solution strength of Ti–Nb-based alloys was developed using JMat Pro software. The experiments show that the designed alloys are all composed of single b phase after solid solution treatment, the tensile strength of the alloys coincides well with that predicted by the formula（the relative error ／4 %）, and the elastic moduli decrease with —Bo values increasing. The Ti35Nb3.7Zr1.3Mo alloy has the biggest —Bo value（2.869） and the lowest elastic modulus（54 GPa） among the three designed alloys.

摘要：When a seismic wave propagates through subsurface viscoelastic media,the formation absorbs the high-frequency energy of the seismic wave more strongly than the low-frequency *** the depth and the off set increase,the diff erence between the logarithmic spectral areas with high and low frequencies gradually *** on this seismic wave characteristic,we have developed a novel Q-estimation method based on logarithmic spectral area diff erence of high and low frequencies(referred to as the LSAD_LH method).In this paper,we derive the theoretical relationship between the Q value and difference of logarithmic spectral areas with high and low frequencies and prove the applicability of the LSAD_LH method using a single-layer medium numerical *** verify the sensitivity of the LSAD_LH method to bandwidth selection and noise,we compare the LSAD_LH method with two credible methods—the logarithmic spectral ratio(LSR)and logarithmic spectral area diff erence(LSAD)methods using a synthetic model containing the random *** results demonstrate that the LSAD_LH method is not highly dependent on bandwidth,and in terms of noise immunity,it is signifi cantly better than the LSR method and has the same advantages as the LSAD *** further highlight the advantages of the LSAD_LH method,we apply the LSAD_LH and LSAD methods to the vertical seismic profi ling(VSP)numerical simulation of the multilayer media and the fi eld zero-off set VSP *** application of the two cases proves the applicability of the LSAD_LH method and the accuracy of the high Q-value estimation relative to the LSAD ***,via the transmission coeffi cient,the LSAD_LH method overcomes the weakness of the LSAD method.