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Crystalline carbon nitride with in-plane built-in electric field accelerates carrier separation for excellent photocatalytic hydrogen evolution

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Chinese Chemical Letters 2024年第4期35卷 160-165页

作者： Wengao Zeng yuchen dong Xiaoyuan Ye Ziying Zhang Tuo Zhang Xiangjiu Guan Liejin Guo International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi'an Jiaotong UniversityXi'an 710049China

Achieving a high carrier migration efficiency by constructing built-in electric field is one of the promising approaches for promoting photocatalytic activity. Herein, we have designed a donor-acceptor(D-A) crystalline carbon nitride(APMCN) with 4-amino-2,6-dihydroxypyrimidine(AP) as electron donor, in which the pyrimidine ring was well embedded in the heptazine ring via hydrogen-bonding effect during hydrothermal process. The APMCN shows superior charge-transfer due to giant built-in electric field(5.94times higher than pristine carbon nitride), thereby exhibiting excellent photocatalytic H_(2) evolution rate(1350 μmol/h) with a high AQY(62.8%) at 400 nm. Mechanistic analysis based on detailed experimental investigation together with theoretical analysis reveals that the excellent photocatalytic activity is attributed to the promoted charge separation by the giant internal electric field originated from the D–A structure.

关键词： Crystalline carbon nitride Built-in electric field Donor-acceptor structure Photocatalysis Hydrogen production

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执行器攻击下神经网络事件触发滑模同步控制

控制工程 2024年第3期31卷 450-456页

作者：董昱辰王婕李红超河北工业大学人工智能与数据科学学院天津300130 北京科技大学智能科学与技术学院北京100083

针对多神经网络系统在执行器攻击和外部随机干扰下的同步控制问题,对事件触发滑模控制方法进行研究。首先,设计了2种新的积分滑模函数,保证多神经网络系统在整个同步过程中的全局鲁棒性;其次,在事件触发机制的基础上,针对系统存在有界... 详细信息

针对多神经网络系统在执行器攻击和外部随机干扰下的同步控制问题,对事件触发滑模控制方法进行研究。首先,设计了2种新的积分滑模函数,保证多神经网络系统在整个同步过程中的全局鲁棒性;其次,在事件触发机制的基础上,针对系统存在有界扰动和执行器攻击的问题,设计了分布式事件触发积分滑模控制器,在抑制干扰和攻击的同时实现了多神经网络的同步控制,并且节约了通信资源;再次,基于李雅普诺夫稳定性理论,给出了多神经网络同步的充分条件,并通过推导得出最小触发时间间隔为大于0的正数,即保证系统不会存在奇诺(Zeno)行为;最后,仿真结果验证了所提控制方法的有效性。

关键词：积分滑模控制执行器攻击事件触发神经网络安全同步

基于太极“十三式”的神经根型颈椎病中西结合运动处方的疗效观察

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辽宁中医杂志 2024年第8期51卷 86-90页

作者：王晓天陶萍董俞辰王何金华市中医医院浙江金华321017 金华职业技术学院浙江金华321016

目的探讨基于太极“十三式”中医疗法联合西康复运动处方在神经根型颈椎病(cervical radiculopathy,CR)治疗中应用效果。方法选取医院2019年1月—12月收治的CR患者76例为对象,将纳入患者进行数字编码(1~76),按照随机数字表法将患者分为3... 详细信息

目的探讨基于太极“十三式”中医疗法联合西康复运动处方在神经根型颈椎病(cervical radiculopathy,CR)治疗中应用效果。方法选取医院2019年1月—12月收治的CR患者76例为对象,将纳入患者进行数字编码(1~76),按照随机数字表法将患者分为3组,数字1~25纳入西方康复运动组,数字26~50纳入太极组,数字51~76纳入中西医结合运动组。从生物学维度、心理学及社会学维度评价治疗效果,即观察患者治疗前后疼痛、握力、颈椎关节活动度(range of motion,ROM)、颈椎功能障碍指数(neck disability index,NDI)和生活质量水平变化情况。结果12、24、36周后,中西医结合运动组患者静息和活动VAS评分低于西方康复运动组和太极组,握力大于西方康复运动组和太极组(P<0.05)。12、24、36周后,中西医结合运动组患者ROM大于西方康复运动组和太极组(P<0.05)。12、24、36周后,中西医结合运动组患者NDI评分低于西方康复运动组和太极组、SF-36总分高于西方康复运动组和太极组(P<0.05)。结论太极“十三式”联合西方康复运动可进一步提高CR患者治疗效果,促进患者生活质量提升,是一种有效的治疗方案。

关键词：神经根型颈椎病太极“十三式” 康复运动颈椎关节活动度颈椎功能障碍指数生活质量

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Cloning and characterization of a C genome-specific repetitive sequence in Aegilops caudata L.

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Chinese Science Bulletin 1999年第14期44卷 1301-1306页

作者： Xiuying Kong Ronghua Zhou yuchen dong Jizeng Jia Chinese Acad Agr Sci Minist Agr Key Lab Crop Germplasm & Biotechnol Beijing 100081 Peoples R China

pAeca212 is 204 bp in length, and the G + C content is 51%. It disperses on all seven chromosome pairs of Aegilops caudata except centromeres and secondary *** with the 316893 DNA sequences registered in Genbank/EMBL/DDJB/PDB, pAeca212 is a new C-genome specific repetitive sequence. The results of genomic specificity analysis of pAeca212 show that there are no hybridization signals detected in all donor Poaceae plants except in rye. pAeca212 is a very useful molecular marker in the study of the origin of Triticeace and the detection of C chromatin in wheat background.

关键词： Aegilops caudata genome specific repetitive sequence.

Chromosomal location of yellow rust resistance gene(s) in Triticum aestivum-Lophopyrum elongatum substitution lines

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Chinese Science Bulletin 1999年第4期44卷 344-348页

作者： Jianxin Ma Ronghua Zhou yuchen dong Jizeng Jia Chinese Acad Agr Sci Inst Crop Germplasm Resources Beijing 100081 Peoples R China

A set of T. aestivum-L. elongatum substitution lines were studied on yellow rust resistance at seedling stage, inheritance of the resistance and esterase-5 (Est-5) analysis. The results demonstrated that L. elongatum carried a new yellow rust resistance gene(s), which was dominant and located on chromosome 3E of L. elongatum. The biochemical locus encoding Est-5 was also located on chromosome 3E, and was tentatively named Est-E5, which was co-segregant with the Yr gene(s) in wheat background. In addition, the transmission frequencies of chromosome 3E in 3A/3E and 3D/3E hybrids selfing were significantly higher than that of chromosome 3E in 3B/3E hybrid, which was probably due to the difference on genetic relationships among A, B, D and E genomes.

关键词： Triticum aestivum-Lophopyrum elongatum substitution lines yellow rust resistance gene location biochemical marker.

Molecular mapping of a novel yellow rust resistance gene of wheat using microsatellite markers

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Chinese Science Bulletin 1999年第19期44卷 1774-1778页

作者： Jianxin Ma Ronghua Zhou yuchen dong Xiaoming Wang Jizeng Jia Chinese Acad Agr Sci Inst Crop Germplasm Resources Beijing 100081 Peoples R China Minist Agr Key Lab Crop Germplasm Resources & Biotechnol Beijing 100081 Peoples R China

Identification and genetic analysis of yellow rust resistance have suggested that wheat line R55 carries single dominant gene conferring yellow rust resistance. The bulked segregant analysis (BSA) for an F2 population using microsatellite marker technique has indicated that the yellow rust resistance gene is located on the short arm of chromosome 1B, tightly linked to

关键词： mlcrosatellite markers gene mapping yellow rust wheat.

澳大利亚海洋类国家公园露营地规划管理分析与启示——基于3个露营地的案例研究

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国家公园（中英文）

国家公园（中英文） 2024年第2期2卷 123-132页

作者：康渊董俞辰彭婉婷吴承照中国矿业大学建筑与设计学院徐州221116 同济大学建筑与城市规划学院上海200092

露营地是伴随世界国家公园建设过程中产生并逐渐普及的一种弱建设、低干扰的生态旅游设施。澳大利亚是一个被海洋包围的国家,海洋类国家公园建设较早,生态旅游设施相对完善,露营地规划管理相对成熟。通过对澳大利亚洲西海岸海洋类国家... 详细信息

露营地是伴随世界国家公园建设过程中产生并逐渐普及的一种弱建设、低干扰的生态旅游设施。澳大利亚是一个被海洋包围的国家,海洋类国家公园建设较早,生态旅游设施相对完善,露营地规划管理相对成熟。通过对澳大利亚洲西海岸海洋类国家公园露营地规划管理的实际调研,采用案例研究方法,梳理了澳大利亚海洋类国家公园3个不同类型的露营地规划管理特点,分析了影响国家公园露营地规划管理的多种因素,揭示海洋类国家公园的选址规划,主要受海洋资源环境的游憩价值开发与海洋生态保护目标两大影响因素之间平衡关系的影响,认为科学的露营地规划管理是平衡海洋类国家公园海洋生态保护与海景游憩资源开发的重要途径之一,提出建立海洋类国家公园露营地建设从“选址规划”到“布局管理”综合性框架,为我国设立海洋类型国家公园营地规划管理提供借鉴启示。

关键词：澳大利亚海洋类国家公园露营地规划管理

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土壤秸秆注孔对土壤含水量及作物生长的影响

水土保持通报 2024年第1期44卷 50-56页

作者：李梦琦肖辉张慧高贤彪程文娟董昱辰张余良陈坤天津市农业科学院天津300384 天津大学环境科学与工程学院天津300350 天津亚派绿肥生物科技发展有限公司天津301600

[目的]研究土壤秸秆注孔对土壤含水量及作物生长的影响,为旱作农田增加雨水蓄集能力及提高水分利用效率提供理论依据。[方法]开展玉米—小麦轮作田间试验,设置常规种植(CK)、土壤秸秆注孔2孔/m^(2)(T_(1)),4孔/m^(2)(T_(2)),8孔/m^(2)(T... 详细信息

[目的]研究土壤秸秆注孔对土壤含水量及作物生长的影响,为旱作农田增加雨水蓄集能力及提高水分利用效率提供理论依据。[方法]开展玉米—小麦轮作田间试验,设置常规种植(CK)、土壤秸秆注孔2孔/m^(2)(T_(1)),4孔/m^(2)(T_(2)),8孔/m^(2)(T_(3))4个处理。[结果]秸秆注孔所有处理均提高了整个试验期表层土壤含水量。T_(2),T_(3)处理提高了收获期深层土壤含水量,试验结束时两者底层土壤(60—80cm)含水量较CK分别提高了29.19%和28.18%。秸秆注孔处理提高了作物株高、经济产量和生物量,以及降水利用效率和水分利用效率,T_(2),T_(3)处理的提高效果最明显,且彼此差异不显著。[结论]秸秆注孔具有保水性能和增产能力,根据成本和效果综合考虑,推荐秸秆注孔4孔/m^(2)(T_(2))作为优选处理。

关键词：土壤秸秆注孔土壤含水量玉米—小麦轮作水分利用效率

Genetic diversity and construction of core collection in Chinese wheat genetic resources

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Chinese Science Bulletin 2008年第10期53卷 1518-1526页

作者： HAO ChenYang dong yuchen WANG LanFen YOU GuangXia ZHANG HongNa GE HongMei JIA JiZeng ZHANG XueYong Key Laboratory of Crop Germplasm and Biotechnology Ministry of Agriculture/The National Key Facility for Crop Gene Resourcesand Genetic Improvement/Institute of Crop Science Chinese Academy of Agricultural Sciences Beijing 100081 China

Genetic diversity among 5029 accessions representing a proposed Chinese wheat core collection was analyzed using 78 pairs of fluorescent microsatellite (SSR) primers mapped to 21 chromosomes. A stepwise hierarchical sampling strategy with priority based on 4×105 SSR data-points was used to construct a core collection from the 23090 initial collections. The core collection consisted of 1160 accessions, including 762 landraces, 348 modern varieties and 50 introduced varieties. The core ac-counts for 23.1% of the 5029 candidate core accessions and 5% of the 23090 initial collections, but retains 94.9% of alleles from the candidate collections and captures 91.5% of the genetic variation in the initial collections. These data indicate that it is possible to maintain genetic diversity in a core collection while retaining fewer accessions than the accepted standard, i.e., 10% of the initial collections captured more than 70% of their genetic diversity. Estimated genetic representation of the core con-structed by preferred sampling (91.5%) is much higher than that by random sampling (79.8%). Both mean genetic richness and genetic diversity indices of the landraces were higher than those of the modern varieties in the core. Structure and principal coordinate analysis revealed that the landraces and the modern varieties were two relatively independent subpopulations. Strong genetic differentiation associated with ecological environments has occurred in the landraces, but was relatively weak in the modern cultivars. In addition, a mini-core collection was constructed, which consisted of 231 accessions with an estimated 70% representation of the genetic variation from the initial collections. The mini-core has been distributed to various research and breeding institutes for detailed phenotyping and breeding of genetic introgression lines.

关键词：中国小麦遗传因素 SSR 基因