Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》
Abstract：随着信息化、网络化技术的进步,更多的信息化手段应用到教育培训的各个环节。本文立足新华社教育培训信息化建设的现状与实践,对教育培训的线上线下融合发展进行了分析和展望。
Subjects: Nursing >> Nursing submitted time 2022-08-17
Abstract： cerebrovascular accident is the most common complication in patients with hypertension, with high incidence rate, disability and mortality. Based on early diagnosis and early treatment, if we can take active and comprehensive nursing measures, it will have a positive impact on the prognosis of patients with hypertensive cerebrovascular accident. With the progress of society and the transformation of medical model, nursing work not only requires patients to receive simple disease care, but also requires patients to provide comprehensive physical, mental and social care. Therefore, it is particularly important to provide patients with good psychological and physical care.
Peer Review Status:
Awaiting Review
Subjects: Nursing >> Nursing submitted time 2022-08-17
Abstract： Intervertebral disc is an important supporting structure of the spine, and its protrusion is an important source of low back pain and sciatica. Lumbar disc herniation is a common syndrome caused by lumbar disc degeneration and fibrous ring rupture, which causes nucleus pulposus herniation to stimulate or compress nerve roots. The specific clinical manifestation is low back pain and numbness. Lumbar disc herniation is a common disease in outpatient service. This paper mainly discusses the main causes of lumbar disc herniation and outpatient nursing strategies.
Peer Review Status:Awaiting Review
Subjects: Geosciences >> Other Disciplines of Geosciences submitted time 2019-09-11 Cooperative journals: 《干旱区地理》
Abstract：基于甘肃省28个气象站点1967—2017年的逐日气象数据，采用Penman-Monteith 公式和作物系数计算了小麦的需水量，结合美国农业部土壤保持局推荐的方法计算了有效降水量，进一步得出小麦缺水量，并分析了小麦需水量与缺水量的变化趋势和空间分布特征，探讨了小麦需水量影响因子重要程度。结果表明：1967—2017年甘肃省春、冬小麦全生育期的年平均需水量分别为517.03 mm和436.70 mm，年平均缺水量分别为468.24 mm和301.54 mm；在时间上，51 a来春小麦种植区内的需水量与缺水量整体上无明显的趋势变化，而冬小麦种植区内的需水量与缺水量整体上呈明显上升趋势；在空间上，春小麦种植区内需水量和缺水量大致由西北向东南递减，冬小麦种植区内的需水量和缺水量大致由西向东递减。甘肃省小麦生育期内日照时数和日平均气温是影响小麦需水量的主要因素。
Subjects: Geosciences >> Other Disciplines of Geosciences submitted time 2018-10-23 Cooperative journals: 《干旱区地理》
Abstract： 纹理特征作为一种非光谱信息能够增强地物之间的特征差异，这对于高分辨率遥感影像的地物提取有着重要意义。本文以青土湖为研究区，以Worldview-2影像为数据源，通过引入权重因子定义联合概率函数来确定最佳窗口尺度，利用灰度共生矩阵提取最佳窗口尺度下的纹理特征，将其与原始遥感影像合成，采用最小二乘支持向量机（LSSVM）进行地物提取，将提取结果与仅利用光谱信息的支持向量机（SVM）提取结果、辅以纹理特征的SVM提取结果对比分析。结果表明，本文方法可以更加快速准确地提取青土湖地物，精度高达85.86%，优于仅利用光谱信息的SVM的 65.13%，辅以纹理特征的SVM的73.45%，可为地物破碎的干旱区高分辨率遥感影像地物提取提供有益借鉴。
Subjects: Mechanics >> Oscillation and Wave submitted time 2023-06-21 Cooperative journals: 《应用力学学报》
Abstract：
The concrete multi-ribbed conical reticulated shell is a new spatial structure formed by dividing the conical surface into multi-ribbed flat plates.The multi-ribbed flat plates meet at the valley(ridge)line.In order to understand the stability of the structure,the arc length method is used for geometric nonlinear analysis on the basis of elastic stability analysis.The effects of rise-span ratio,boundary beam rigidity and initial geometric defects on the structural bearing capacity are discussed.The results show that the weak part of the structure is mainly the intersection between the valley line and the multi-ribbed slab.The buckling instability has the characteristics of a shell structure,and the ultimate bearing capacity drops sharply after jumping instability.The increase of the rise-span ratio will reduce the structural bearing capacity.As the boundary beam is the main force transmission member of,increasing its rigidity can effectively improve the overall rigidity of the structure.Changing the rigidity of the ridge(valley)beam and the thickness of roof plate has little contribution to improving the overall stability of the structure.Increasing the rigidity of the multi-ribbed beam will effectively enhance the structure's ability to resist instability.The initial geometric defects have little effect on the ultimate bearing capacity of the structure.The amplitude L/300 is regarded as the largest initial defect acceptable to the structure.The stability bearing capacity formula is fitted to the structure,and the calculation error is within acceptable engineering accuracy.
Subjects: Biology >> Ecology submitted time 2017-03-22 Cooperative journals: 《生态学报》
Abstract：采用高通量测序技术分析了鄱阳湖典型湿地土壤细菌群落特征。测序结果表明，不同植被土壤细菌群落丰度与多样性的排序相同：苔草带 > 苔草-虉草带 > 芦苇带 > 泥滩带 > 藜蒿带。沿湖面至坡地，空间位置相近的土壤细菌群落结构具有更大的相似性，苔草-虉草带、苔草带和芦苇带的细菌群落结构相近，泥滩带和藜蒿带的细菌群落结构差异较大。变形菌门（30.0%）是湿地土壤平均相对丰度最高的门，其次为酸杆菌门（16.7%）和绿弯菌门（16.5%）；多数门分类细菌相对丰度沿湖面至坡地存在一定变化趋势。硝化螺菌属是第一大属分类水平细菌群落。在土壤化学指标中，与鄱阳湖湿地细菌群落相关性较大的是总磷、铵态氮和有机质含量。以上研究结果表明，鄱阳湖湿地不同植被土壤细菌群落具有结构性差异，但沿湖面至坡地存在规律性变化。
Subjects: Nursing >> Nursing submitted time 2022-09-06
Abstract：
This paper summarizes the research progress of auricular point sticking in the treatment of insomnia from four aspects: common auricular points, treatment methods, sticking materials, and combined application with other traditional Chinese medicine therapies, so as to provide reference for clinical treatment of insomnia.
Subjects: Nursing >> Nursing submitted time 2022-09-06
Abstract：
stroke is a common and frequently-occurring disease in clinic, which is also called stroke and cerebral apoplexy. It has a high incidence and occurs frequently in middle-aged and elderly people.As the population ageing process continues to accelerate, the incidence of stroke in our country has also significantly increased. The main clinical manifestations of stroke are cerebral ischemia, hemorrhagic injury, etc. . The disease has a high rate of disability and mortality, has a serious harm to human health, is one of the most important fatal diseases in the world.The clinical symptoms of stroke, including headache, vomiting, dizziness, sudden visual disturbance and disturbance of consciousness, affect the health and quality of life of patients to a great extent, it can easily threaten the patient"s life and health. Therefore, it is very important to give timely and effective treatment for stroke patients.In order to improve the therapeutic effect and promote the rehabilitation of patients with stroke, it is necessary to pay attention to the effective nursing intervention. A large part of stroke patients have different degrees of disability, such as physical dysfunction, consciousness disorders, and so on, to patients and their families have brought a huge mental and economic burden. Therefore, it is necessary to strengthen the rehabilitation care of stroke patients.With the development of traditional Chinese medicine in our country, the application of traditional Chinese medicine in clinical nursing work is more and more extensive. For example, in the convalescent stage of stroke, the effective rehabilitation nursing of Chinese and Western medicine plays an important role in improving the rehabilitation quality of patients. This study on the recovery of stroke-related studies of Traditional Chinese and Western medicine rehabilitation nursing were retrospectively analyzed.
Subjects: Geosciences >> Geography submitted time 2024-06-12 Cooperative journals: 《干旱区研究》
Abstract： Exploring the dynamic change characteristics of soil moisture and vegetation water demand in the Northwest Arid Zone can provide scientific basis for the amount of water required at different stages of ecological recovery and the optimal allocation of water resources. Based on this, the Perpendicular Drought Index (PDI), Modified Perpendicular Drought Index (MPDI), and Vegetation-adjusted Perpendicular Drought Index (VAPDI) were constructed by using the Sentinel-2 L2A and Landsat8 OLI remote sensing images, combined with the 111 data from 0-10 cm of the measured soil in the north and south mountains of Lanzhou City as the study area. Perpendicular Drought Index (PDI), Modified Perpendicular Drought Index (MPDI) and Vegetation-adjusted Perpendicular Drought Index (VAPDI) were constructed respectively, and the quantitative coefficients of determination (R2), Mean absolute Arrors (MAE), Mean Relative Errors (MRE), and average relative errors of the four model indicators were used. (MAE), mean relative error (MRE), and root mean square error (RMSE) to evaluate the accuracy of the model inversion, select the optimal soil moisture inversion model and combine the soil moisture limiting coefficients with the spatial data of forest, grassland, and cropland vegetation area in the study area in 2019, and the evapotranspiration of the reference crop within the growing season at each site, and finally construct the ecological water demand model of the vegetation, to clarify the soil moisture and vegetation ecological water demand in the study area. The results showed that: (1) there were different degrees of linear negative correlations between PDI, MPDI, VAPDI and measured data under the two data sources, of which the R2 was 0.37, 0.64 and 0.59, respectively, and from the results of the evaluation indexes, the fit coefficient of determination of the soil moisture regression model of MPDI was the highest, and the spatial soil moisture regression model of the two remote sensing data inversions had the highest coefficient of determination. data inversion of soil moisture spatial distribution pattern had consistency. (2) The soil moisture inversion of Sentinel-2 L2A with high resolution is more refined, and the overall soil moisture shows a fluctuating growth trend, with the average value of soil moisture for multiple time periods being 23.27%, showing a decrease and then an increase and then a decrease, with an overall increase of 74.07%. (3) The monthly average value of vegetation water demand in April-October in the north and south mountains of Lanzhou City showed an increase and then a decrease, which was consistent with the change of soil moisture content, and the value of vegetation water demand was the largest in April-October, 3.98×107 m3 in July, and the smallest vegetation ecological water demand was 0.97×107 m3 in October, which appeared in October. month. With the implementation of the environmental greening project, the north and south hills of Lanzhou City have gradually formed a community structure with a combination of multiple species from only drought-tolerant herbs and low shrubs. This study can provide a reference for the rational use of soil and water resources and vegetation restoration in the north and south mountains of Lanzhou City.
Subjects: Geosciences >> Geography submitted time 2020-01-06 Cooperative journals: 《干旱区地理》
Abstract：青土湖区域属于绿洲—荒漠过渡带，生态系统脆弱，极易发展为荒漠。梭梭、白刺和芦苇为青土湖区域的植被优势种，对其生态系统稳定与健康发展起着关键作用。以青土湖区域梭梭、白刺和芦苇为研究对象，利用空间分辨率为0.5 m的高分辨率遥感影像Worldview-2，采用辅以纹理特征的面向对象分类方法，提取梭梭和白刺的冠幅面积以及芦苇的分布面积；根据野外试验数据，建立梭梭和白刺地上生物量与冠幅面积、芦苇地上生物量与分布面积关系模型。利用关系模型、冠幅面积以及分布面积对青土湖区域植被优势种地上生物量进行了估算，实现了植被优势种地上生物量估算由“点”到“面”的转换。结果表明：（1） 采取辅以纹理特征的面向对象分类方法取得了较高的分类精度，总体Kappa系数为87.9%，总体精度达到91.3%。（2） 研究区植被优势种地上生物量总量为3.17×103 t，其中梭梭地上生物量为0.54×103 t，白刺地上生物量为0.90×103 t，芦苇地上生物量为1.73×103 t，地上生物量芦苇>白刺>梭梭。该研究可以为深入研究青土湖区域生态恢复与碳储量提供参考。
Subjects: Psychology >> Social Psychology submitted time 2023-03-27 Cooperative journals: 《心理学报》
Abstract： In this age of information, a variety of market information can be obtained and plenty of opportunities often appear. It is very important for investors to seize the opportunity, and it depends on whether they can hold the heuristic information, use and integrate the available information, then develop effective program to make decision timely. Successful investors can seize the heuristic information, distinguish between necessary and redundant information of market and integrate useful information becoming a profitable program which ordinary people are not easy to figure out. This process is creative. The study aims to explore this creative thinking mechanism of market information integration. The study tried to reveal the creative thinking mechanism in information integration of market by using the method of individual test and group test, supported by individual interviews, and carried out two experiments exploring how the quantity of information and the highlighting of key heuristic information affected decision-making results on business investment problem. The information used in experiments was from real market. In experiment Ⅰ, participants were divided into two groups, one group was asked to develop a program according to 6 necessary information, another group was asked to develop a program according to 6 necessary information and 14 redundant information. In experiment Ⅱ, participants were also divided into two groups, one group was asked to develop a program according to 6 necessary information and 6 dynamic redundant information, another group was asked to develop a program according to 6 necessary information and 6 static redundant information, and whether they had marked key heuristic information was randomly assigned to each group. The results of experiments showed that the more information provided to the participants, the larger the space of information integration problem, then the integration process was more difficult; when participants searched in the problem space, they needed to seize the key heuristic information to form an initial intention of thinking and make a clear direction for further search; after the formation of the initial intention was formed, participants needed to select necessary information, eliminate redundant information, and integrate all the information available, thus the initial intention was more refined, and eventually a profitable perfect investment program was formed. The study explored the creative thinking process of market information integration, and the findings of this study could try to apply for the training practice in human resource management. There is still much work to do for this study, including developing test materials, the discrimination of the materials, the effect of working memory capacity and perception.
Subjects: Nursing >> Nursing submitted time 2022-09-06
Abstract： At present, people pay more and more attention to their own health, and their awareness of rights protection has also been enhanced. Patients themselves and their families have put forward more and higher requirements for the quality of hospital care, among which, nursing Safety is one of the most important. Nursing safety is not only an important index to measure the quality of nursing service, but also the most direct basis for patients to choose hospitals. In this paper, the existing nursing unsafe factors research literature was combed to better grasp the research progress of nursing unsafe factors, in order to better for nursing safety and improve the quality of nursing services.
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-11-29 Cooperative journals: 《计算机应用研究》
Abstract： For the intelligent algorithm, it is easy to fall into local optimum when implementing blind source separation, and the convergence speed is slow, this paper proposes a blind source separation algorithm based on Givens transform and second-order oscillator particle swarm optimization. This algorithm constructs the functional relationship between the inertia weight and the learning factor, and adjusts the algorithm together to improve the algorithm's overall and global search ability. The second-order oscillation increases the diversity of the population, so the algorithm is not easy to fall into the local optimum. In addition, the algorithm uses Givens transformation to convert the separation matrix into a rotation angle representation to reduce the complexity and accelerate the convergence speed. Simulation results show that the algorithm can effectively achieve the blind separation of mechanical vibration signals and speech signals, and has faster convergence speed and better separation performance than other algorithms
Subjects: Geosciences >> Atmospheric Sciences submitted time 2023-06-28 Cooperative journals: 《干旱区地理》
Abstract：近年来，全球减轻灾害风险战略对广布型灾害风险的认知以及地方尺度上持续优先管控密集型灾害风险的效能引发了学术界和应急管理利益相关者对灾害风险管理理论与实践的争议。通过分析山西省19832019年历史气象灾害特征，提出运用混合损失超越曲线（HLEC）估算中国省域气象灾害年均农业经济损失（AAL）和典型重现期情景下的最大农业经济损失（OEP），全面准确地反映气象灾害农业风险水平。结果表明：（1）山西省气象灾害AAL达22.22108元，单次灾害OEP超过0.15108元，即全省全年和受损县区单次灾害防治及应急管理支出储备分别不低于22.22108元和0.15108元。（2）HLEC在省域尺度上的灾害风险评估有效，在地级市和县区尺度上的适用性和有效率接近60%。（3）山西省97%以上的历史气象灾害为广布型灾害，造成超过95%的农业受灾面积和农业经济损失，相应的AAL和OEP占比均超过85%，广布型灾害风险是省域减轻灾害风险和灾害风险管理的重点。籍此，本研究初步证实了地方或基层减轻广布型灾害风险的必要性（为什么管），讨论了传统应急管控广布型灾害风险不足的原因（不敢管、管不了和不想管），提出了及时应对广布型灾害风险和避免其累积带来社会经济影响的意义（如永久脱贫、高质量城市化、可持续发展），拟为各级政府和应急管理部门制定减轻灾害风险和灾害风险管理策略提供正确方向，为提高城市、社区和家庭的灾害韧性提供决策参考。
Subjects: Geosciences >> Marine Sciences submitted time 2023-05-31
Abstract： Quantifying eddy mixing in the ocean is a hot and tough problem in the area of physical oceanography. Based on the theory of effective diffusivity, the present study investigated the stirring effects of geostrophic turbulence that lead to stretching, distorting, deforming, and folding of tracer contours. These changes are then related to the efficiency of turbulent mixing. Results show that under the stirring effect of geostrophic turbulence, the length of tracer contour can be quickly elongated and fine-scale tracer filaments and fronts are also generated. This fractal elongation of tracer contour, about 10-20 times longer than the original length, is the dominant contributor to the mixing efficiency, whereas the gradient enhancement associated with filament and front generations only plays a secondary role. On the other hand, fine-scale features are smoothed out by small-scale diffusivity which eventually suppresses the increase of contour length and the generation of tracer filaments. This imposes an upper bound of the mixing efficiency when the stirring and smoothing effects are in a dynamical balance. Through a ‘box-counting’ method, the fractal dimension of tracer contour is also found between 1.4~1.6, indicating a geometric dimension lies somewhere between 1D and 2D. Due to the limitation of data resolution, contour length and thus mixing efficiency may be underestimated. Finally, the present study made an empirical relation between the fractal dimension and mixing efficiency, providing an opportunity for estimating mixing efficiency through a well-developed pattern recognition technique in remote sensing, and a new way of diagnosing ocean mixing and its parameterization.
Peer Review Status:Awaiting Review
Subjects: Biology >> Ecology submitted time 2018-05-18 Cooperative journals: 《生态学报》
Abstract：近年来，中国沿海处于快速工业化和城市化驱动下的新一轮大规模围填海阶段，环渤海围填海历史久、规模大，已成为我国围填海的重心区域。由于围填海和河口三角洲增长，1940s以来渤海面积萎缩了0.57×104km2，萎缩速率大于82km2/a，2000年以来萎缩速率更高达141km2/a；渤海自然岸线的长度和比例也急剧下降，由1990年的1397km减少为2014年的561km，占岸线总长度的比例由54.92%下降为16.18%。围填海导致多种危害，如：海洋潮波和水动力条件变化，近岸和近海沉积环境与水下地形变化，加剧近岸水环境与底泥环境污染，潮滩湿地面积减损与生态功能下降，底栖生物栖息地减损和群落破坏，侵占和破坏渔业资源"三场一通道"，加剧海岸带自然灾害风险、诱发经济社会系统风险，对产业和经济发展带来不利影响，等。在分析我国围填海监督管理现状和问题的基础上，提出政策建议：改革和优化围填海管理体制，建立陆海协调与联动机制，完善法律法规；严格执行生态红线制度，控制围填海规模与速度，推进和优化保护区建设；开展已围填区及其周边海域环境和生态的恢复与重建；强化已围填区新增土地资源的监管和集约优化利用；加强基础观测体系建设，大力促进科学研究的发展；促进公众、利益相关方及非政府组织参与到滨海湿地的保护。
Subjects: Geosciences >> Space Physics submitted time 2016-05-13
Abstract： The middle lightning phenomena is a key topic in the middle and upper atmosphere.In this dissertation,its emissive spectral is studied by numerical simulation.On the base of the quasi-electrostatic(QE)field excitating mechanism,the quasielectrostatic field distribution with height caused by a sudden discharge of thunderstorm cloud is calculated by single point charge model.The reduced E-field(E/N,where E is the quasielectrostatic field intensity and N is the neutral density)is inputted into the Boltzmann equation function for the electron energy distribution with time in a mixture of partially ionized gases.The excitation rate corresponding to the collisional process as a function of reduced E-field is calculated.On the base of the calculations the volume emissive rate for each emissive band is calculated,then the volume emissive rate is inputted into the atmophere radiative transfer function to obtain the radiative intensity with wavelength.Example for the excitation calculated when E/N=200Td,the radiative intensity produced thousands of rayleighs.The spectral distribution is relative to the atmospheric composition and dectection path.
Peer Review Status:Awaiting Review
Subjects: Astronomy >> Astrophysical processes submitted time 2023-06-07 Cooperative journals: 《天文学进展》
Abstract： The rapidly oscillating Ap (roAp) stars are pulsating stars locating on the main-sequence, which pulsate in high-overtone, low degree, non-radial p-modes. These s#2;tars exhibit magnetic fields and anomalous spectral lines. Their rotations are slow, but the pulsations are fast. With the improved observational capabilities of telescopes, especially the space-based telescopes, more and more roAp stars and their various pulsation modes are detected, which makes the observational and theoretical study of roAp stars developing rapidly. Studies of the pulsation may provide the information of the roAp stars’ rotation periods, rotation inclinations, magnetic geometries and magnetic field strengths. In addi#2;tion, these studies help to reveal the mechanisms of pulsations and chemical peculiarities. In this paper, the peculiarity properties, pulsation excitation theories, and observational efforts of roAp stars are summarized, and some open questions including pulsation exci#2;tation mechanisms, pulsation mode selection and the distribution on the HR diagram are discussed.
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2020-11-19 Cooperative journals: 《干旱区地理》
Abstract： 基于甘肃河西走廊15个国家基准基本站点提供的1966年1月1日～2018年12月31日春季（3～5月）逐日最低气温值数据，利用线性回归分析方法、Spline空间插值法和Mann-Kendall趋势和突变检验法，探讨了河西走廊地区1966—2018年春季（3～5月）寒潮频次变化及其影响因子。研究表明：（1）1966—2018年河西走廊地区春季（3～5月）单站寒潮频次总体呈现下降趋势〔－0.098次·（10 a）－1〕，其中1980—2010年寒潮频次呈显著下降趋势，2010年之后下降趋势变缓，未通过显著性检验；区域寒潮53 a来频次总体呈缓慢下降趋势〔-0.015次·（10 a）－1〕。（2）近53 a河西走廊地区春季三个月中，单站寒潮总量4月＞3月＞5月，其中4月、5月寒潮频次下降不明显，3月频次下降显著。（3）空间上，大致以北大河和黑河干流为界，两河中间区域春季寒潮频次低，而北大河以北和黑河干流以东区域则是寒潮高值区，走廊外围地区寒潮频次较高，且大多呈显著下降趋势，寒潮频次与气温距平存在明显负相关关系，内部地区变化趋势不明显。（4）河西地区春季寒潮频次受气候变暖、地形和大气环流的影响，寒潮频次变化趋势存在地区差异。研究可提高对甘肃河西走廊寒潮演化过程的认知，为河西走廊气候变化的进一步研究奠定基础。
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