Subjects: Biology >> Botany submitted time 2023-08-24 Cooperative journals: 《广西植物》
Abstract： To study the seed dormancy and germination mechanism of Xanthoceras sorbifolium, the seeds of four cultivars (‘Putong’(PT),‘Qihong’(QH), ‘Wofeng’(WF) and‘Woshi’(WS)) were stored at -20 ℃ for different periods (30, 60, 90, 120, 150 d). The seed germination indexes were determined in each treatment, and the changes of reserve substance and hormone content were also analyzed in three stages including before storage, after storage, and 7 days germination. The results were as follows: (1) Cold storage could significantly promote the germination rate (Gr) and germination potential of small seeds (PT, QH). The best treatment was cold storage for 60 days, and the Gr was to 48.3 % and 58.3%, respectively. The effect of cold storage on large seeds (WF and WS ) was lower than that of small seeds. (2) The kernel oil content, seed shell thickness (SST) in four cultivar seeds all decreased significantly during periods of cold storage and germination, especially in the 3-7 days of germination, the oil content and SST (except WS cultivar) decreased notably. However, water content in kernels increased rapidly within 1-3 days of germination and then slowly increased to the peak value at the 7th day. The contents of starch and soluble sugar in kernels increased significantly at the 3th or 4th day of germination. (3) Cold storage increased GA/ABA and tHor/ABA ratios in small seeds (PT, QH), promoted oil degradation, made seed shell thinning and break seed dormancy. In conclusion, the main factors leading to dormancy in Xanthoceras sorbifolium seeds are large in size, higher shell thickness and hardness, physiological post-ripening, and belongs to comprehensive dormancy type. Cold storage at -20 ℃ for 60 d could improve the germination rate of PT, QH and WF seeds, reduces dormancy degree, while the cold storage time of WS seeds needs prolonging to 150 days. The method using -20 ℃ storage with wet sand germination is a rapid and simple method to promote Xanthoceras sorbifolium seeds germination. This study provides a reference for the promotion of superior varieties and the research on the seed breaking dormancy mechanism in Xanthoceras sorbifolium.
Subjects: Nursing >> Nursing submitted time 2023-04-24
Abstract： Objective To investigate the effect of Traditional Chinese Medicine (TCM)characteristic nursing combined with Liuzijue Qigong on rehabilitation of cardiac function in patients with chronic heart failure (CHF). Methods A total of 80 CHF patients were randomly divided into the study group and control group, with 40 cases in each group. All patients received routine drug therapy during hospitalization. Patients in the control group were give routine care including work-rest schedule, dietary guidance, psychological care and daily care. Patients in the study group were given TCM characteristic nursing combined with Liuzijue Qigong in addition to routine care. The Minnesota Living with Heart Failure Questionnaire (MLHFQ) was used to measure the patient quality of life, and outcomes of left ventricular ejection fractions (LVEF) and 6-minute walking test were measured and compared between two groups. Results Longer 6MWD and higher LEVF were reported in both groups at three months of intervention, and patients in the study group achieved better outcomes of 6MWD and higher LEVF compared with those in the control group（P＜0.01）. The score of MLHFQ decreased in both groups at three months of intervention, and score of MLHFQ in the study group was lower than that in the control group (P＜0.01). Conclusion The TCM characteristic nursing combined with Liuzijue Qigong is potentially effective to improve the rehabilitation of cardiac function and long-term quality of life in CHF patients.
Peer Review Status:
Awaiting Review
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2022-12-20 Cooperative journals: 《中国全科医学》
Abstract：
Background Coronary heart disease belongs to the category of "chest numbness and heartache" in traditional Chinese medicine. Blood stasis syndrome is the most common syndrome distribution. Expand on basis of this study in the early stage of the team, for the first use of arterial elasticity and the vascular endothelial function testing combined apolipoprotein ratios combined diagnosis of young and middle-aged CHD, blood stasis, early detection of young and middle-aged coronary heart disease, blood stasis is dedicated to providing you with new ideas, also can be used to supplement optimization the diagnostic criteria of CHD with blood stasis syndrome. Objective To investigate the correlation between ABI, baPWV, FMD, apoB/apoA-1 and blood stasis syndrome in young and middle-aged patients with CHD, and its diagnostic and predictive value. Method A comprehensive search for eligible cases was conducted from December 1, 2016 to December 1, 2021 in China-Japan Friendship Hospital. Totally 127 young and middle-age CHD patients with blood stasis syndrome and 79 cases without blood stasis syndrome were included. Data of ABI, baPWV, FMD and apoB/apoA-1 ratio before PCI was extracted and compared in multivariate logistic regression analysis. The accuracy of our prediction model was evaluated by ROC curve. Results Multivariate Logistic regression analysis showed that ABI, baPWV, FMD, apoB/apoA-1 radio were independently correlated with young and middle-age CHD patients with blood stasis syndrome and the differences were statistically significant (P=0.001, P<0.001, P<0.001, P=0.035, respectively). The regression equation for predicting probability P was P=1/[1+e-(5.519-0.599×ABI+0.297×BAPWV-0.515×FMD+0.172×apoB/apoA-1)]. ROC curve analysis showed that the diagnosis of young and middle-age CHD patients with blood stasis syndrome was significant if ABI≤1.19 (1/ABI=0.84), baPWV≥14.93m·s-1, FMD≤8.33% (1/FMD=0.12) or apoB/ APOA-1 radio ≥0.72. The AUC of ABI, baPWV, FMD, apoB/APOA-1 radio and P value were 0.647, 0.680, 0.676, 0.606 and 0.807, respectively. The AUC of prediction probability P was higher than that of each index alone (P<0.001) , whose sensitivity and specificity were 0.740 and 0.734 respectively. Conclusion ABI, baPWV, FMD and apoB/APOA-1 were independently correlated with young and middle-age CHD patients with blood stasis syndrome and combined evaluation of them possesses the best diagnostic predictive efficiency for early identification and intervention.
Subjects: Nursing >> Nursing submitted time 2022-09-06
Abstract：
Traditional Chinese Medicine (TCM) emotional nursing is a kind of psychological therapy, which is based on the theory of medical psychology, through the language, expression, posture, attitude, behavior and temperament of the nursing staff to affect and improve the patient emotional state. According to the patient’s condition, appropriate psychological care is carried out to relieve the negative emotions, so as to achieve the purpose of disease prevention and treatment.
Subjects: Astronomy >> Astrophysical processes submitted time 2022-04-14 Cooperative journals: 《天文研究与技术》
Abstract：卫星导航星基增强系统（SBAS）由不同国家建设，所增强卫星星座和参考时间系统不尽相同，因此SBAS时间基准之间的兼容互操作一直是国际民航组织（ICAO）SBAS标准研究中的重要技术问题。本文介绍了SBAS网络时间（SNT）概念和研究现状，结合ICAO SBAS标准与建议措施（SAPRs）制定，对SNT兼容互操作问题进行了分析和研究，并给出了目前最新的联合解决方案。在此基础上，对北斗星基增强系统（BDSBAS）地面状态进行了升级，并开展了服务性能初步测试。结果表明，BDSBAS单频（SF）SNT和双频多星座（DFMC）SNT与参考GNSS时间基准之间的最大偏差分别为37 ns、0.17 s，满足ICAO标准要求；服务性能基本符合APV-I等级要求，证明了BDSBAS时间基准互操作的可行性和可靠性。
Subjects: Astronomy >> Astrophysical processes submitted time 2022-01-14 Cooperative journals: 《天文研究与技术》
Abstract：为促进全球卫星导航系统（GNSS）在国际航空领域的应用，国际民航组织（ICAO）正在开展面向北斗卫星导航系统（BDS）、GPS、Galileo、GLONASS的标准与建议措施（SARPs）的研究、验证与升级工作。BDS自2010年启动ICAO标准化工作以来，历时11年，参加了50余次技术会议，提交了90余份、千余页技术文件，涉及2000余项问题，关闭了189项验证指标。本文重点围绕时间与坐标基准、射频信号特征、空间信号性能等北斗标准国际化推进过程中的重点问题开展论述。北斗时与国际UTC的偏差保持在50ns以内（模1s），北斗坐标系与ITRF-2014之间的差异不超过3cm；对北斗民用信号落地电平、信号质量、抗干扰能力进行了分析和验证，构建了北斗空间信号畸变模型；最后，明确了北斗在ICAO SAPRs框架下的服务性能定义和计算方法，并利用系统实际数据验证北斗系统空间信号性能均满足设计指标要求。以上的分析、模型与验证结果表明，北斗系统具有良好的时空兼容与互操作基础，射频信号质量高、抗干扰能力强，相关内容满足指标要求，能够提供面向国际航空领域的高安全高完好性导航服务，已被写入ICAO BDS SARPs中，为我国北斗系统国际化及民航领域推广应用奠定了良好的理论、标准及验证基础。
Subjects: Geosciences >> Atmospheric Sciences submitted time 2021-12-14 Cooperative journals: 《干旱区地理》
Abstract： 基于 1961—2019 年新疆 86 个县（市）出现的 3220 次暴雨洪涝灾害事件，依据灾害中出现的 死亡人数、倒塌房屋数、倒塌棚圈数、牲畜死亡数量和农作物受灾面积 5 种灾情要素构建灾损指数，并根据百分位数方法对灾损指数进行等级划分，对应将暴雨洪涝灾害事件定量划分为一般、较重、 严重、特重 4 个等级，用于评估新疆暴雨洪涝灾害的时空分布及其变化。新疆出现暴雨洪涝灾害次 数最多的区域是伊犁河谷、阿克苏地区和喀什地区，同时这 3 个区域也是出现暴雨洪涝灾情最重的区域。危害性等级较轻（一般、较重）的暴雨洪涝灾害出现次数较多的区域大多集中在新疆北部，随着暴雨洪涝灾害危害程度加重，新疆北部大部分区域严重和特重等级灾害出现次数迅速减少， 新疆南部的阿克苏、喀什等地区平均出现次数明显多于全疆其他区域，伊犁河谷各危害性等级出 现次数较其他区域为中等到较多，尤其是特重等级暴雨洪涝灾害出现次数位居全疆前三。新疆暴雨洪涝灾害主要出现在夏季，6 月和 7 月出现次数最多。新疆暴雨洪涝灾害出现次数的突变出现在 1980 年代中期，自 1980 年代中期起，新疆 3—10 月降水增多，极端降水事件增加，各危险等级暴雨 洪涝灾害出现次数、年出现次数和年灾损指数发生了 3.8~5.6 倍的增幅；降水量和大雨以上量级的降水日数是形成新疆暴雨洪涝灾害的主要致灾因子。
Subjects: Geosciences >> Atmospheric Sciences submitted time 2020-01-02 Cooperative journals: 《干旱区研究》
Abstract： 根据1961—2018年新疆夏季高温日数的气候特征分析，新疆夏季高温日数的空间分布型可以分为全疆一致型、南北反相型和东西反相型。全疆一致型分布为新疆夏季高温日数的主要空间分布形态，在20世纪90年代中后期发生了一致增多的突变；南北反相型的分布在21世纪是多发的；21世纪以来，东西反相型多表现为偏西地区高温日数偏少、偏东地区高温日数偏多的分布特征。与3类分布型显著相关的环流场关键区域均位于中低纬度，当南亚高压偏强且南亚高压中心位置偏北时，夏季中低纬度尤其是30°～50°N位势高度明显升高，有利于新疆高温日数偏多。对于位于中纬度的新疆区域，从高度场的合成和温度平流的分析来看，厄尔尼诺事件不利于新疆夏季高温日数的偏多。
Subjects: Geosciences >> Other Disciplines of Geosciences submitted time 2019-09-11 Cooperative journals: 《干旱区研究》
Abstract：利用1961—2016年新疆各站逐日气温、NCEP再分析高度场、风场资料及北大西洋涛动（NAO）指数，分析了新疆1961—2016年冬季出现的极端冷事件频次变化及与其相联系的环流特征。冬季NAO通过欧亚（EU）波列传播影响新疆冬季极端冷事件的变化，但冬季NAO位相与新疆冬季极端冷事件并没有逐年一一对应的负相关关系。在冬季NAO负位相年，由EU波列传播，70°N以北北风偏弱，当乌拉尔山及其以东区域位势高度偏高（低），50°~70°N西风偏弱（强）时，新疆冬季极端冷事件偏多（少）；在冬季NAO正位相年，由EU波列传播，70°N以北北风偏强，当乌拉尔山及其以东区域位势高度偏高（低），50°~70°N西风偏弱（强）时，新疆冬季极端冷事件偏多（少）。因此，冬季NAO、乌拉尔山及其以东区域高度场和50°~70°N西风三者共同作用决定了新疆冬季极端冷事件的发生频次，其中乌拉尔山及其以东区域位势高度和50°~70°N西风在冬季NAO对新疆极端冷事件的影响关系中起到了重要的调制作用。
Subjects: Biology >> Botany >> Applied botany submitted time 2019-06-17 Cooperative journals: 《广西植物》
Abstract：该文采用菌丝生长速率法，研究了山芝麻根、茎和叶不同溶剂萃取物在1.5 mg·mL-1 浓度下对10 种植物病原真菌菌丝生长的抑制活性，用孢子萌发法测试了山芝麻根石油醚相和乙酸乙酯相萃取物对香蕉炭疽病菌分生孢子萌发的抑制作用，用离体法测试了山芝麻根石油醚相和乙酸乙酯相萃取物对香蕉炭疽病的防治效果，并通过气相与质谱联用技术（Gas Chromatography-Mass Spectrometer，GC-MS）分析了山芝麻根石油醚相和乙酸乙酯相萃取物的主要成分，测试了其中8 种主要化合物对香蕉炭疽病菌菌丝生长的抑制活性。结果表明山芝麻各部分萃取相对10 种植物病原真菌菌丝生长均具有不同程度的抑制作用，其中，在1.5 mg·mL-1 浓度下，山芝麻根石油醚相和乙酸乙酯相萃取物对香蕉炭疽病菌菌丝生长的抑制率分别为87.00%和86.14%，其EC50 分别为0.062 mg·mL-1 和0.052 mg·mL-1；浓度在2 mg·mL-1、4 mg·mL-1、8 mg·mL-1时，山芝麻根石油醚相和乙酸乙酯相萃取物对香蕉炭疽病菌分生孢子萌发相对抑制率均在70%以上；在10mg·mL-1 浓度下，山芝麻根石油醚相和乙酸乙酯相萃取物对香蕉炭疽病的防治效果分别为72.32%和59.77%；通过气相与质谱联用技术对山芝麻根石油醚相和乙酸乙酯相萃取物进行了分析，其中，山芝麻根石油醚相萃取物中共鉴定出36 种主要化学成分，山芝麻根乙酸乙酯相萃取物中共鉴定出17 种主要化学成分，选取的8 种主要化合物中，在100 μg·mL-1 浓度下，邻苯二甲酸二异丁酯和邻苯二甲酸二丁酯对香蕉炭疽病菌菌丝生长显现较高的抑制活性，抑制率分别为65.12%和68.07%，EC50分别为56.66 μg·mL-1和37.04μg·mL-1。
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2019-03-07 Cooperative journals: 《干旱区地理》
Abstract：基于新疆1961—2016年89个观测站冬季平均气温经验正交分解的空间模态，讨论了与各空间模态及其相联系的北半球中高纬度环流特征，结果表明：新疆冬季平均气温的年际异常空间模态分为全区一致类、南北反相类、东西反相类，根据这三类空间模态的正负位相不同分别分为一致偏冷型、一致偏暖型、北冷南暖型、北暖南冷型、东冷西暖型和东暖西冷型等6个空间分布型。新疆冬季平均气温各空间分布型的环流影响因子既表现了极地和中纬度环流相互作用，也有纬圈方向的波列传播的影响。当北半球中纬度西风偏弱，中高纬度环流经向度加大，乌拉尔山地区的高压脊发展和东亚大槽偏深，50°N以南为负高度距平，新疆冬季平均气温一致偏低；反之则一致偏高。北冷南暖型在40°N以北的区域与一致偏冷型的环流特征基本类似，但在中亚至新疆40°N偏南的区域位势高度偏高；北暖南冷型出现时，乌拉尔山负高度距平和东亚大槽偏弱，新疆上空为浅脊控制，新疆南部受脊后的浅槽影响。东冷西暖型和东暖西冷型区别在于中纬度的500 hPa正高度距平中心的位置和700 hPa气流方向。北极涛动（AO）、区域西风指数、乌拉尔山关键区因子、欧亚纬向环流指数、西藏高原-1指数、西藏高原-2指数、斯堪的纳维亚遥相关型指数(SCA)、亚洲区极涡面积指数等8个气候指数都对新疆冬季平均气温产生了重要的影响。
Subjects: Psychology >> Other Disciplines of Psychology submitted time 2018-10-26 Cooperative journals: 《心理学报》
Abstract：本研究考察个体关于加工流畅性的信念对学习判断(Judgment of learning, 简称JOL)的影响, 探讨字体大小效应的产生机制。研究通过两个实验分别考察个体关于“字体大小影响加工流畅性” (实验1)以及“加工流畅性影响记忆效果” (实验2)等信念对字体大小效应的影响。结果发现：1)当人们相信大字体更流畅(实验1)或者越流畅越好记(实验2)时, 他们在大字体项目上的JOL值显著高于小字体; 2)当人们相信小字体更流畅(实验1)或者流畅性与记忆无关(实验2)时, 他们在大字体和小字体项目上的JOL值无显著差异, 字体大小效应消失。上述结果表明, 个体关于加工流畅性的信念是字体大小效应产生的重要原因, 是人们进行学习判断的重要线索。
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. submitted time 2018-01-05 Cooperative journals: 《工程热物理学报》
Abstract：本文以R410A 家用分体式空调机为原型，以新型的双排分液冷凝器，构建分液冷凝空调系统，并研究其系统匹配及综合性能。采用理论优化管程布置的双排分液冷凝器，实验研究了在毛细管长度为300 mm~800 mm 和制冷剂充注量为950 g~1350 g 条件下，分液冷凝空调系统性能的变化规律,并与原型系统作对比。研究表明，在制冷名义工况下，较原型系统，最优分液冷凝系统的能效比（energy efficiency ratio，EER）和制冷量高5.1%和4.2%，所需的毛细管长度少16.7%，而制冷剂充注量高8.6%。
Subjects: Dynamic and Electric Engineering >> Engineering Thermophysics submitted time 2017-11-23 Cooperative journals: 《工程热物理学报》
Abstract：随着全球性的能源紧缺和环境问题日益严重，充分利用可再生能源和工业等行业的低品位余热资源，从而提高能源利用效率是缓解能源和环境问题的重要方式。有机朗肯循环(ORC）最优应用前景的低品位热能发电技术之一是。本文针对ORC系统建立了结构参数和系统操作参数同步优化的换热设备多目标优化模型，采用R245fa为工质和板式换热器，以?效率最大和比投资成本最小为目标函数。首先分析了单个变量(蒸发压力、冷凝压力、过热度、蒸发器板间距、冷凝器板间距)对系统性能的影响，然后选取了系统的运行参数（蒸发压蒸发压力、冷凝压力、过热度)和换热器的结构参数(蒸发器和冷凝器的板长、板宽、板间距)九个参数为决策变量，利用遗传算法进行ORC换热设备结构与操作参数多目标同步优化，获得多目标优化的Pareto最优前沿及对应的最优系统运行参数和最佳换热器结构参数组合。
Subjects: Dynamic and Electric Engineering >> Engineering Thermophysics submitted time 2017-10-30 Cooperative journals: 《工程热物理学报》
Abstract：随着全球性的能源紧缺和环境问题日益严重，充分利用可再生能源和工业等行业的低品位余热资源，从而提高能源利用效率是缓解能源和环境问题的重要方式。有机朗肯循环(ORC）最优应用前景的低品位热能发电技术之一是。本文针对ORC系统建立了结构参数和系统操作参数同步优化的换热设备多目标优化模型，采用R245fa为工质和板式换热器，以?效率最大和比投资成本最小为目标函数。首先分析了单个变量(蒸发压力、冷凝压力、过热度、蒸发器板间距、冷凝器板间距)对系统性能的影响，然后选取了系统的运行参数（蒸发压蒸发压力、冷凝压力、过热度)和换热器的结构参数(蒸发器和冷凝器的板长、板宽、板间距)九个参数为决策变量，利用遗传算法进行ORC换热设备结构与操作参数多目标同步优化，获得多目标优化的Pareto最优前沿及对应的最优系统运行参数和最佳换热器结构参数组合。
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