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数字乡村发展与农村老年人健康水平

华南农业大学学报（社会科学版） 2024年第4期23卷 48-62页

作者：陈华帅马伟湘潭大学商学院湖南湘潭411100

利用2020年中国乡村振兴调查(CRRS)数据,探讨了数字乡村发展对农村老年人健康水平的影响。研究发现:第一,数字乡村发展能够提升农村老年人健康水平。乡村经济数字化、乡村治理数字化、乡村生活数字化及乡村基础设施数字化均提升了农村... 详细信息

利用2020年中国乡村振兴调查(CRRS)数据,探讨了数字乡村发展对农村老年人健康水平的影响。研究发现:第一,数字乡村发展能够提升农村老年人健康水平。乡村经济数字化、乡村治理数字化、乡村生活数字化及乡村基础设施数字化均提升了农村老年人健康水平,其中乡村经济数字化对农村老年人健康影响的边际效应最小。第二,数字乡村发展通过助力乡村经济、乡村治理和乡村生活提升农村老年人健康水平。第三,数字乡村发展对老年人健康水平的影响效应在农村老年人性别、学历、村庄地理位置和村庄地势四个方面存在异质性。基于以上结论,本文认为应全面推动数字乡村建设,助力乡村治理、乡村生活和乡村经济,以提升农村老年人健康水平,积极应对人口老龄化,促进健康中国发展。

关键词：数字乡村发展农村老年人健康积极老龄化健康中国

数字技术助力乡村公共服务普惠供给与城乡公共服务均等化

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中央民族大学学报（哲学社会科学版） 2024年第1期51卷 113-122页

作者：马九杰高原中国人民大学农业与农村发展学院北京100872

实现乡村公共服务普惠供给和城乡公共服务均等化是促进共同富裕的应有之义。因具有特殊的物理和社会属性,乡村地区的公共服务建设面临独特挑战。数字技术的合理运用能够为回应这些挑战贡献力量。本文从公共服务的理论分析出发,梳理乡村... 详细信息

实现乡村公共服务普惠供给和城乡公共服务均等化是促进共同富裕的应有之义。因具有特殊的物理和社会属性,乡村地区的公共服务建设面临独特挑战。数字技术的合理运用能够为回应这些挑战贡献力量。本文从公共服务的理论分析出发,梳理乡村公共服务建设所具有的独特难点,然后结合经验案例阐述数字技术助力优化乡村公共服务体系的作用机制,进而在此基础上探讨数字技术赋能乡村公共服务普惠供给的实施策略与建议。

关键词：数字化转型乡村公共服务城乡公共服务均等化治理效能

Treatment of cervical spine metastasis with minimally invasive cervical spondylectomy: A case report and literature review

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World Journal of Clinical Cases 2021年第3期9卷 644-650页

作者： Li-Ming He Xun ma Chen Chen hong-Yi Zhang Department of Orthopedics Bethune Hospital Affiliated to Shanxi Medical UniversityTaiyuan 030032Shanxi ProvinceChina

BACKGROUND Cervical spondylectomy for the treatment of cervical tumors is traumatic,causes bleeding,and is *** study reports on the experience with minimally invasive cervical spondylectomy for a cervical metastasis and reviewed the literature on cervical *** purpose was to reduce the risk and trauma of *** SUMmaRY A 60-year-old woman presented with cervical pain and radiating pain in the left upper limb for more than 2 *** diagnosis was C4 metastasis of thyroid *** visual analogue scale score was *** Spinal Cord Injury Association(ASIA)grade was *** classification was ***-Boriani-Biagini(WBB)classification was A-D,*** score was *** Tokuhashi score was *** instability neoplastic score(SINS)was *** patient underwent minimally invasive cervical spondylectomy on September 28,*** operative time was 200 min;the estimated blood loss was 1200 *** operation was successful,without *** postoperative visual analogue scale score was *** patient remained classified as ASIA grade E at the last *** accepted regular iodine-131 therapy *** serum thyroglobulin(Tg)level of this patient was 299.02 ng/mL at 1 mo after the operation and was 13.57 ng/mL at the last *** was no local recurrence at the 25-mo follow-up,according to images,single-photon emission computed tomography,and serum Tg *** ossification and solid fusion of C3-C5 were found at the last *** Minimally invasive cervical spondylectomy with tubular retractor could minimize soft tissue trauma,intraoperative traction injury,and paraspinal muscle injury,accelerating postoperative *** technique requires a rich experience in cervical spine surgery with tubular retractors,so that surgeons can visualize the anatomical structure in a small field.

关键词： Minimally invasive Cervical Spondylectomy Tubular retractor Thyroid carcinoma Case report

Identifying the limiting factors driving the winter wheat yield gap on smallholder farms by agronomic diagnosis in North China Plain

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Journal of Integrative Agriculture 2019年第8期18卷 1701-1713页

作者： CAO hong-zhu LI Ya-nan CHEN Guang-feng CHEN Dong-dong QU hong-rui ma Wen-qi College of Resources and Environmental Science Hebei Agricultural University Baoding 071000 P.R.China College of Resources and Environmental Sciences China Agricultural University Beijing 100193 P.R.China National Agricultural Technology Extension and Service Center Ministry of Agriculture and Rural Affairs Beijing 100125 P.R.China

North China Plain(NCP) is the primary winter wheat production region in China, characterized by smallholder farming systems. Whereas the winter wheat average yield of smallholder farmers is currently low, the yield potential and limiting factors driving the current yield gap remain unclear. Therefore, increasing the wheat yield in NCP is essential for the national food security. This study monitored wheat yield, management practices and soil nutrient data in 132 farmers’ fields of Xushui County, Baoding City, Hebei Province during 2014–2016. These data were analyzed using variance and path analysis to determine the yield gap and the contribution of yield components(i.e., spikes per hectare, grain number per spike and 1 000-grain weight) to wheat yield. Then, the limiting factors of yield components and the optimizing strategies were identified by a boundary line approach. The results showed that the attainable potential yield for winter wheat was 10 514 kg ha^–1. The yield gaps varied strongly between three yield groups(i.e., high, middle and low), which were divided by yield level and contained 44 farmers in each group, and amounted to 2 493, 1 636 and 814 kg ha^–1, respectively. For the three yield components, only spikes per hectare was significantly different(Pmanagement factors in the seeding step were the most important for affecting spikes per hectare.

关键词： yield gaps smallholder limiting factors path analysis boundary line analysis

A comprehensive diagnostic system of ultra-thin liquid sheet targets

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High Power Laser Science and Engineering 2024年第3期12卷 41-50页

作者： Ziyang Peng Zhengxuan Cao Xuan Liu Yinren Shou Jiarui Zhao Shiyou Chen Ying Gao Pengjie Wang Zhusong Mei Zhuo Pan Defeng Kong Shirui Xu Zhipeng Liu Yulan Liang Tianqi Xu Tan Song Xun Chen Qingfan Wu Yujia Zhang Zihao Zhang Xueqin Yan Wenjun ma State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijingChina National Key Laboratory of Shock Wave and Detonation Physics Institute of Fluid PhysicsChina Academy of Engineering PhysicsMianyangChina Center for Relativistic Laser Science Institute for Basic ScienceGwangjuRepublic of Korea Institute of Radiation Physics Helmholtz-Zentrum Dresden RossendorfDresdenGermany Beijing Laser Acceleration Innovation Center BeijingChina Institute of Guangdong Laser Plasma Technology GuangzhouChina

To meet the demands of laser-ion acceleration at a high repetition rate,we have developed a comprehensive diagnostic system for real-time and in situ monitoring of liquid sheet targets(LSTs).The spatially resolved rapid characterizations of an LST’s thickness,flatness,tilt angle and position are fulfilled by different subsystems with high *** the help of the diagnostic system,we reveal the dependence of thickness distribution on collision parameters and report the 238-nm liquid sheet generated by the collision of two liquid *** methods for the flatness and tilt angle of LSTs have also been provided,which are essential for applications of laser-driven ion acceleration and others.

关键词： diagnostics laser-ion acceleration liquid sheet targets

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近代中国南北方农业经营风险差异探析

南京大学学报（哲学．人文科学．社会科学） 2024年第4期61卷 66-80,156页

作者：马烈高超群中国社会科学院经济研究所北京市100836

风险是农业经营面临的重要问题。灾害是农业经营面临的主要风险,近代北方的自然灾害较南方更多几乎是学界的共识,但尚缺乏实证性的分析与研究。本文通过量化统计,比较了近代中国南北方出现影响农业生产的灾害县次、爆发重大灾害的次数(... 详细信息

风险是农业经营面临的重要问题。灾害是农业经营面临的主要风险,近代北方的自然灾害较南方更多几乎是学界的共识,但尚缺乏实证性的分析与研究。本文通过量化统计,比较了近代中国南北方出现影响农业生产的灾害县次、爆发重大灾害的次数(及死亡人数),同时将南北方总县数与人口数的差异也纳入分析之中。结果显示,近代北方的自然灾害确比南方更严重。此外,灾害的爆发也会给农业经营带来一些社会性风险,包括市场波动、匪患等,通过对此进行统计与分析,结果发现,北方农业经营面临的市场波动风险大于南方;而北方的匪患至少不弱于南方。兵燹也是近代农业经营面临的社会性风险,总体来说北方遭受的兵燹要大于南方,但其对农业经营的影响有限。

关键词：农业经济史南北问题农业经营风险自然灾害

maternal Thermal Effects on Female Reproduction and Hatchling Phenotype in the Chinese Skink(Plestiodon chinensis)

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Asian Herpetological Research 2018年第4期9卷 250-257页

作者： Li ma Zhihua LIN Jianfang GAO hong LI Xiang JI hongliang LU Jiangsu Key Laboratory for Biodiversity and Biotechnology College of Life Sciences Nanjing Normal University School of Ecology Lishui University Hangzhou Key Laboratory for Animal Adaptation and Evolution School of Life and Environmental Sciences Hangzhou Normal University

We maintained gravid Chinese skinks(Plestiodon chinensis) at three constant temperatures(25, 28 and 31 °C) during gestation, and randomly assigned eggs from each female to one of the same three temperatures for incubation to determine maternal thermal effects on female reproduction and hatchling phenotype. maternal temperature affected egg-laying date, hatching success and hatchling linear size(snout-vent length, SVL) but not clutch size, egg size, egg component, and embryonic stage at laying. More specifically, females at higher temperatures laid eggs earlier than did those at low temperatures, eggs laid at 31 °C were less likely to hatch than those laid at 25 °C or 28 °C, and hatchlings from eggs laid at 31 °C were smaller in SVL. Our finding that maternal temperature(pre-ovipositional thermal condition) rather than incubation temperature(post-ovipositional thermal condition) affected hatching success indicated that embryos at early stages were more vulnerable to temperature than those at late stages. Our data provide an inference that moderate maternal temperatures enhance reproductive fitness in P. chinensis.

关键词： Developmental plasticity egg incubation female reproduction hatchling phenotype maternal thermal effect Plestiodon chinensis

Heavy metal contamination of urban topsoil in a petrochemical industrial city in Xinjiang, China

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Journal of Arid Land 2016年第6期8卷 871-880页

作者： WANG Wei LAI Yingshuai ma Yuanyuan LIU Zilong WANG Shufen hong Chenglin School of Chemistry and Chemical Engineering/Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan Shihezi University Shihezi 832003 China College of Sciences & Technology Shihezi University Shihezi 832003 China

Heavy metal pollution is a widespread phenomenon in many countries of the world. In this study, we conducted a field investigation to assess the status of heavy metal pollution in urban soils of Dushanzi, a district of Karamay city in Xinjiang, China. A total of 56 soil samples in the topsoil layer of 0-15 cm were collected within the urban area and seven elements （Cu, Zn, Cd, Pb, Cr, As and Ni） were analyzed. The mean concentrations of these metals were all higher than their corresponding background values of soils in Xinjiang. We used the pollution index and ecological risk index to assess the degree of heavy metal pollution and the potential ecological risk of urban soils. The pollution index values of Cu, Zn, Cd, Pb, Cr, As and Ni were 1.81, 1.35, 4.64, 1.27, 1.80, 1.39 and 1.22, respectively; and the potential ecological risk index values for them were 12.03, 1.79, 185.05, 8.39, 4.78, 18.44 and 1.79, respectively. These results indicated that urban soils in Dushanzi were polluted by heavy metals to some extent and demonstrated a high ecological risk, as influenced by industrial activities. Cd was the key element for the metal pollution of urban soils in the study area. Correlation analyses, principal component analysis coupled with the spatial distribution maps of element concentrations further soils can be mainly attributed to petrochemical commercial activities. revealed that heavy metal pollution of urban ndustry, coal chemical industry, traffic and

关键词： heavy metal urban soils source identification ecological risk pollution index

Chemical constituents from the submerged plant Potamogeton crispus and their effects on NAD(P)H:quinone oxidoreductase 1

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Chinese Chemical Letters 2012年第10期23卷 1157-1160页

作者： Miao Ye Jun Zhi ma Juan Xiong Shu Ting Liu Dong Wang Chong gang Yuan Ji Yan ma Jin Feng Hu Department of Natural Products for Chemical Genetic Research Key Laboratory of Brain Functional GenomicsEast China Normal UniversityShanghai 200062China Department of Natural Products Chemistry School of PharmacyFudan UniversityShanghai 201203China School of Life Science East China Normal UniversityShanghai 200062China

A new isopimarane-type diterpene （liwariverol, 1） and eight known compounds were isolated and characterized from the EtOAc extract of the whole plant of Potamogeton crispus. The structure of 1 was elucidated to be 17-hydroxy-8c^H-isopimara-9（11）,15- diene by means of spectroscopic methods. Among the isolates, crenulatoside A （2）, an acyclic sesquiterpene glycoside, was found to have anti-oxidative activity with enhancement of the expression of the NAD（P）H：quinone oxidoreductase 1 （NQO1） in human neuroblastoma SH-SY5Y cells at 100 μmol/L after a 24-h incubation.

关键词： Potamogeton crispus Potamogetonaceae Isopimarane-type diterpene Crenulatoside A NQO1 Anti-oxidative activity