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Soil Respiration Characteristics and Its Relationship with Environmental Factors of Different Vegetation Types during Growing Season in Dongting Lake

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Agricultural Biotechnology 2019年第1期8卷 126-129,179页

作者： yan yanG Jie TANG Yongjin LI yuxi TANG Changzhu LI Lijuan JIANG Hunan Forestry Academy Central South University of Forestry and Technology

In order to ascertain the soil carbon flux characteristics of poplar plantations and crop communities in the Dongting Lake area during the growing season and their correlation with hydrothermal conditions,soil respiration rate was monitored at fixed sites and time points with an LI-8100 A automated soil flux ***,the surface temperature and soil temperature and humidity were measured. The soil respiration variation in the two different vegetation types and its correlation with environmental factors were analyzed. The results showed that in the growing season,the diurnal variation curves of soil respiration rate in the two different vegetation types showed a single peak variation,but there was certain difference in the appearance time of the peak. The peak of the crop appeared around11: 00 am,while the peak of soil respiration in the poplar appeared around 13: 00. The soil respiration rate of the poplar was also significantly higher than that of the crop,and the average difference of soil respiration rate between the two was 3. 09 and 3. 55 μmol/( m^2·s) in April and August,respectively. Temperature and soil moisture were the main factors affecting soil respiration of the poplar plantation and crop community. Temperature had a greater effect on the soil respiration of the crop community,and soil humidity had a greater impact on soil respiration in the poplar plantation,showing a correlation coefficient reaching 0. 952.

关键词： Dongting Lake Growing season Soil respiration rate Temperature Humidity Correlation

Responses of Gardenia jasminoides Ellis Leaf Traits and Anatomical Structures to Drought Stress in Purple Soil

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Agricultural Biotechnology 2021年第5期10卷 93-97页

作者： yan yanG Lei LI Jie TANG yuxi TANG Yongjin LI Mengrong LUO Hunan Academy of Forestry Changsha 414004China

[Objectives]This study was conducted to investigate the response of Gardenia to purple soil drought stress,hoping to provide a reference for the selection of plants for vegetation restoration in purple soil regions.[Methods]The pot-weighing water control method was used to apply different degrees of drought stress to Gardenia seedlings in purple soil,and the effects of drought stress on the electrical conductivity,chlorophyll content,leaf morphology and structure of Gardenia leaves were explored.[Results]The leaf electrical conductivity increased with the increase of drought stress intensity,and the leaf electrical conductivity under severe drought stress increased by 59.93%compared with the control;the chlorophyll content of Gardenia showed a single-peak changing trend that increased and then decreased with the development of drought stress,and it was the highest in each stress stage under severe drought stress;the leaf thickness,palisade tissue thickness and sponge tissue thickness of Gardenia were reduced with the stress degree increasing,and showed the largest decreases under severe stress;the stomatal length,stomatal width and stomatal opening of Gardenia gradually decreased with the increase of stress,while the stomatal density gradually increased.[Conclusions]This study provides a technical and resource basis for vegetation restoration in purple soil.

关键词： Purple soil Drought stress Gardenia jasminoides Ellis Anatomical structure Leaf traits

Hybrid femtosecond laser system based on a Yb:KGW regenerative amplifier for N_P polarization

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Chinese Optics Letters 2019年第4期17卷 71-74页

作者： Dongyu yan Bowen Liu yuxi Chu Huanyu Song Lu Chai Minglie Hu Chingyue Wang Ultrafast Laser Laboratory Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education School of Precision Instruments and Opto-electronics Engineering Tianjin University

We report a hybrid femtosecond laser system based on a femtosecond Yb-doped fiber laser and a Yb-doped potassium gadolinium tungstate(Yb:KGW) regenerative amplifier. To match the central wavelength of the seed source, a Yb:KGW crystal is used in the regenerative amplifier for N_p polarization. We study and optimize the dynamics of nonlinear amplification to alleviate the gain narrowing effect. With optimization, the system can output 270 fs pulses with 21 μJ pulse energy at a 60 kHz repetition rate.

关键词： hybrid femtosecond femtosecond Yb-doped 60 kHz repetition

利用改良AAO工艺实现城市污水处理厂的高效提标改造

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价值工程 2024年第21期43卷 35-37页

作者：可华艳通海县市政基础设施建设中心玉溪652799

本文结合某城镇污水处理厂的基本建设情况,就改良AAO工艺在污水处理厂工程中的应用问题进行分析,旨在能够实现对城市污水的有效处理,并重点对各处理单元设计参数、功能以及设计特点进行了分析,以期为相关人员提供参考。

关键词：改良AAO工艺污水处理厂提标改造

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Focal adhesion protein Kindlin-2 regulates bone homeostasis in mice

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Bone Research 2020年第1期8卷 26-38页

作者： Huiling Cao Qinnan yan Dong Wang Yumei Lai Bo Zhou Qi Zhang Wenfei Jin Simin Lin Yiming Lei Liting Ma yuxi Guo Yishu Wang Yilin Wang Xiaochun Bai Chuanju Liu Jian QFeng Chuanyue Wu Di Chen Xu Cao Guozhi Xiao Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research Shenzhen Key Laboratory of Cell Microenvironmentand Department of BiologySouthern University of Science and TechnologyShenzhen 518055China Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education Co-innovation Center of NeuroregenerationNantong UniversityNantong 226001China Department of Orthopedic Surgery Rush University Medical CenterChicagoIL 60612USA Department of Cell Biology School of Basic Medical SciencesSouthern Medical UniversityGuangzhou 510515China Department of Orthopedic Surgery New York University School of MedicineNew YorkNY 10003USA Department of Cell Biology New York University School of MedicineNew YorkNY 10016USA Department of Biomedical Sciences Texas A&M University College of DentistryDallasTX 75246USA Department of Orthopedic Surgery The Johns Hopkins UniversityBaltimoreMD 21205USA

Our recent studies demonstrate that the focal adhesion protein Kindlin-2 is critical for chondrogenesis and early skeletal development. Here, we show that deleting Kindlin-2 from osteoblasts using the 2.3-kb mouse Col1 a1-Cre transgene minimally impacts bone mass in mice, but deleting Kindlin-2 using the 10-kb mouse Dmp1-Cre transgene, which targets osteocytes and mature osteoblasts, results in striking osteopenia in mice. Kindlin-2 loss reduces the osteoblastic population but increases the osteoclastic and adipocytic populations in the bone microenvironment. Kindlin-2 loss upregulates sclerostin in osteocytes,downregulates β-catenin in osteoblasts, and inhibits osteoblast formation and differentiation in vitro and in vivo. Upregulation ofβ-catenin in the mutant cells reverses the osteopenia induced by Kindlin-2 deficiency. Kindlin-2 loss additionally increases the expression of RANKL in osteocytes and increases osteoclast formation and bone resorption. Kindlin-2 deletion in osteocytes promotes osteoclast formation in osteocyte/bone marrow monocyte cocultures, which is significantly blocked by an anti-RANKLneutralizing antibody. Finally, Kindlin-2 loss increases osteocyte apoptosis and impairs osteocyte spreading and dendrite ***, we demonstrate an important role of Kindlin-2 in the regulation of bone homeostasis and provide a potential target for the treatment of metabolic bone diseases.

关键词： homeostasis Kindlin cytes

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我国失能老年人家庭照顾者照顾现状研究进展

中国卫生标准管理 2024年第4期15卷 190-193页

作者：李艳陈红西双版纳职业技术学院中等职业教育中心云南景洪666100 玉溪市人民医院护理部云南玉溪653100

随着我国老龄化进程的加深,失能、半失能老年人口数量也逐渐增多,失能不仅对老人的身心健康造成危害,同时也给家庭、社会造成严重的负担。我国传统的养老观念及现实的养老困境致使绝大多数失能老年人选择在家接受长期照顾;然而,失能老... 详细信息

随着我国老龄化进程的加深,失能、半失能老年人口数量也逐渐增多,失能不仅对老人的身心健康造成危害,同时也给家庭、社会造成严重的负担。我国传统的养老观念及现实的养老困境致使绝大多数失能老年人选择在家接受长期照顾;然而,失能老年人的特点决定了照顾的长期性及艰巨性,致使家庭照顾者面临身体、心理、经济等沉重负担,严重影响照顾者生活质量及其照顾质量。文章从支持家庭照顾者的视角,对我国失能老年人家庭照顾者照顾现状进行综述,全面了解失能老年人照顾者现状、照顾能力与照顾困境,并提出从弘扬中华传统文化,提倡孝道认同,增加照顾者照顾意愿;加快社区发展,在医疗卫生技能及喘息服务方面给予照顾者支持;建立照顾者照顾质量评价体系及加快照顾者支持法律的建立,为照顾者提供经济补偿制度等建议,为我国失能老年人长期照顾体系建立提供参考依据。

关键词：失能老年人家庭照顾者照顾现状研究进展

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塔县帕米尔牦牛产业发展现状及对策建议

中国畜禽种业 2024年第7期20卷 48-56页

作者：孔思远孔大帅卢宇曦常荣荣李晨莹田蕴涵包鹏甲郭宪左二伟张玉波阎萍中国农业科学院深圳农业基因组研究所广东深圳518120 中国农业科学院兰州畜牧与兽药研究所甘肃兰州730050

帕米尔牦牛是塔什库尔干塔吉克自治县高原地区的主要畜牧物种,在塔县具有重要的社会经济地位。该文阐述了塔县帕米尔牦牛屠宰、泌乳、繁殖等性能与产业发展现状,指出了塔县帕米尔牦牛品种退化、繁育技术落后、配套体系不健全等问题,提... 详细信息

帕米尔牦牛是塔什库尔干塔吉克自治县高原地区的主要畜牧物种,在塔县具有重要的社会经济地位。该文阐述了塔县帕米尔牦牛屠宰、泌乳、繁殖等性能与产业发展现状,指出了塔县帕米尔牦牛品种退化、繁育技术落后、配套体系不健全等问题,提出了促进塔县帕米尔牦牛品种选育改良与产业发展的建议,以期为塔县帕米尔牦牛产业振兴与可持续发展提供理论参考。

关键词：帕米尔牦牛牦牛性能品种选育改良产业发展

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丝杠冷滚打变形力影响因素研究

中国机械工程 2020年第9期31卷 1065-1073页

作者：李玉玺李言崔莅沐苗志鸿西安理工大学机械与精密仪器工程学院西安710048 西安现代控制技术研究所西安710065

为研究丝杠冷滚打成形过程中滚打轮半径、滚打轮圆角半径和打入量与变形力之间的关系,在丝杠冷滚打成形原理的基础上建立了有限元仿真模型。通过仿真获得单次滚打以及多次滚打成形过程中,变形力随滚打轮半径、滚打轮圆角半径和打入量的... 详细信息

为研究丝杠冷滚打成形过程中滚打轮半径、滚打轮圆角半径和打入量与变形力之间的关系,在丝杠冷滚打成形原理的基础上建立了有限元仿真模型。通过仿真获得单次滚打以及多次滚打成形过程中,变形力随滚打轮半径、滚打轮圆角半径和打入量的变化规律;设计了正交试验,研究打入量、滚打轴转速、滚打轮厚度及工件转速4个因素对变形力的影响规律。在自行设计的冷滚打成形丝杠设备上进行实验,测得变形力的变化趋势与仿真结果基本一致,验证了有限元仿真模型的正确性。

关键词：丝杠冷滚打滚打轮变形力仿真

Practical Cultivation Techniques of Gardenia jasminoides Ellis for Flowers-Fruits in Hunan Province

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Medicinal Plant 2021年第4期12卷 13-16,23页

作者： yan yanG yuxi TANG Pingshu QIN Xinghua WU Jie TANG Lei LI Yongjin LI Hunan Academy of Forestry Sciences Changsha 410004China Nanhua National Forest Management Service Fenghuang 416200China Fenghuang County Forestry Bureau Fenghuang 416200China

In order to protect and develop the local resources of Gardenia jasminoides Ellis with Hunan characteristics,this paper uses the existing technology,analyzes the existing achievements in the cultivation of *** Ellis,investigates and analyzes the actual situation of the seedling base and cooperatives in Hunan,and collects the relevant index data related to the cultivation of *** *** paper summarizes the practical techniques related to land selection,soil preparation,seedling breeding,afforestation technology,tending management,pest control and so on,in order to provide reference basis for planting and cultivateon and industrial development of *** Ellis in Hunan.

关键词： Hunan Province Gardenia jasminoides Ellis Dual use of flowers and fruits Cultivation