新时期中国民营（家族）企业的传承与创新创业问题

当前中国经济步入新常态,改革开放后第一代企业家也多正在或即将退休,因此,中国民营（家族）企业的传承与转型创新相互交织,在实践和理论上都提出了新的挑战。以前,民（私）营企业和家族企业这两个概念常常被不加区分地使用,但新时期的家族企业和民（私）营企业的内涵已经具有显著的差异,在研究中明确界定研究对象已经非常必要。在家族企业情境下,股权在家族成员间的分散、家族凝聚力、非经济目标重要性、两代人价值观一致性等家族特征显著影响了组织创造力、企业业绩、接班人选择、传承过程、战略变革和企业成长;在民营企业情境下,创业激情通过创业学习促进了新创企业成长,创业伙伴资源不仅直接影响了高科技企业绩效和风险,还会通过创业战略类型选择间接影响绩效与风险,高层管理团队网络特征通过影响知识创造过程促进了企业双元创新。国家自然科学基金项目“农村社区参与、企业合法性与农业创业企业成长研究”（项目号：71673090）、“家族社会资本传承及其对家族企业代际创业的影响机理研究”（项目号：71372059）“家族内外部所有权结构安排与家族企业冒险行为及靖效研究：基于双重代理理论框架”（项目号：71202061）、“农村社区环境、产业特性与涉农家族企业创业研宛”（项目号：71202082）、广东省哲学社会科学“十三五”规划2016年度学科共建项目《企业合法性视角的农村社区参与与农业创业企业成长研究》（项目号：GD16XGIA）和广东省自然科学基金项目“继任者自主权、能力嘉赋与家族企业多元化战略研究”（项目号：2016A030313072）

晶界结构对晶界扩散行为影响机理的研究

重稀土氟化物常被用作晶界扩散的扩散物[1,2]。但是由扩散物造成的晶界的化学成分的变化、微观结构的演变以及最终磁性能的变化还并不十分清楚。因此,我们系统地研究了晶界扩散TbF_3对磁体晶界成分、微观结构以及磁性能影响规律。通过传统的粉末冶金工艺制备名义成分为Nd_(32.5)Fe_(bal)B_(0.92)Cu_(0.1)的磁体,然后用TbF_3作为扩散源进行电泳沉积,将沉积后的磁体在900°C下分别扩散2、4、10、15小时。扩散后的样品磁性能如图1所示。经过2小时的扩散后,磁体的Hcj大幅提高,从12.5kOe提升至23.7kOe。随着扩散时间的延长,H_(cj)逐渐趋于稳定。微观结构分析表明磁体H_(cj)的提高主要由磁体表层的晶粒表层形成了(Nd,Tb)_2Fe_(14)B结构造成的。而从二次电子图像中可以看出磁体表层晶粒逐渐长大,形成了晶粒长大的区域。这种晶粒长大区域构成的自封闭结构阻碍了Tb元素的进一步扩散,最终抑制了Hcj的增加。进一步通过EDS,GDA等手段分析发现,扩散过程中造成的晶界成分变化和Cu元素的迁移是造成磁体表层晶粒异常长大的主要原因

黄土高原抗旱造林技术

本项目主攻目标是解决半干旱区径流林业的理论与技术问题。主要进行了不同造林整地方法径流集存、林地覆盖、吸水剂沾根、幼林地施肥及林草间作等抗旱造林技术措施。技术关键围绕解决黄土丘陵区造林地的水分不足问题。研究提出刺槐、山杏、山桃等主要造林树种系列抗旱造林技术和沙打旺红豆草、披碱草等适于以上树种间作的草种；造林成活率达85%以上，经济林达90%以上，保存率达75%以上，生物产量提高达20%以上。摸索到一套黄土丘陵区水土保持抗旱造林技术措施，为“三北”防护林工程建设提供了科学依据和可行的技术措施。成果达到国际先进水平。经济效益极为显著，主要用于提高造林成活率，保存率及生物产量，在黄土高原及其他半干旱区具有广阔的应用前景

黄土高原抗旱造林技术

本项目主攻目标是解决半干旱区径流林业的理论与技术问题。主要进行了不同造林整地方法径流集存、林地覆盖、吸水剂沾根、幼林地施肥及林草间作等抗旱造林技术措施。技术关键围绕解决黄土丘陵区造林地的水分不足问题。研究提出刺槐、山杏、山桃等主要造林树种系列抗旱造林技术和沙打旺红豆草、披碱草等适于以上树种间作的草种；造林成活率达85%以上，经济林达90%以上，保存率达75%以上，生物产量提高达20%以上。摸索到一套黄土丘陵区水土保持抗旱造林技术措施，为“三北”防护林工程建设提供了科学依据和可行的技术措施。成果达到国际先进水平。经济效益极为显著，主要用于提高造林成活率，保存率及生物产量，在黄土高原及其他半干旱区具有广阔的应用前景

Prediction of Energy Resolution in the JUNO Experiment

International audienceThis paper presents the energy resolution study in the JUNO experiment, incorporating the latest knowledge acquired during the detector construction phase. The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV. To achieve this ambitious goal, significant efforts have been undertaken in the design and production of the key components of the JUNO detector. Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution, extending beyond the statistical fluctuations of the detected number of photons, such as the properties of liquid scintillator, performance of photomultiplier tubes, and the energy reconstruction algorithm. To account for these effects, a full JUNO simulation and reconstruction approach is employed. This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution. The study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the study assesses the contribution of major effects to the overall energy resolution budget. This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies