Results 21 to 30 of about 202,793 (158)
, 2021 目的分析急性脑梗死患者治疗前一站式CT灌注成像（CTP）及治疗前后临床影像资料，明确与预后相关的临床及影像特征。方法纳入CT/MRI 随访证实的39例急性脑梗死患者（男：女= 21：18，平均年龄65岁，平均起病时间8.4 h），所有患者均随访90天获取其mRS评分（平均2.8分）。对上述患者行320排螺旋CT一站式CTP［非增强CT（NCCT）-CT血管成像（CTA）-CTP］扫描，对NCCT图像行ASPECTS（alberta stroke program early ct score）评分 ...
韦丹 +7 more
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Gaoya dianqi, 2022 传统变压器状态评估方法,多关注设备当前状态分析,缺少全方位预测其潜在健康状态方法,也无法确定变压器将来的故障发生概率。本文提出了一种基于自适应概率神经网络的变压器健康状态评估方法。该方法,首先从变压器内部本体特征和外部实时监测环境两方面,确定变压器健康状态指标因子,并进行数据预处理得到不相关的指标因子;然后,根据指标因子和样本标签,引入自适应参数训练,训练出用于预测的概率神经网络模型;最后,利用模型参数,通过将指标分为静态基础指标和动态可变指标,前者直接输入到网络中 ...
张寒, 刘卫东, 潘志敏, 栗娟
doaj
中西医结合护理, 2021 Objective To investigate the effect of Traditional Chinese Medicine (TCM) health preservation exercise in the rehabilitation treatment of patients with late stage of lumbar disc herniation (LDH).
ZHAO Xiangli (赵祥丽) +1 more
doaj +1 more source
大数据, 2022 随着互联网技术的发展，网络舆情热点信息能在短时间内迅速传播。预测舆情热点的发展趋势，有助于高校对学生思想健康状况进行分析管理，也是当下网络舆情信息研究领域的重要课题。针对微博中的舆情信息文本，构建基于时间编码长短期记忆网络（LSTM）的高校舆情热点趋势预测模型，并与支持向量机、循环神经网络两种模型的预测效果进行对比，验证了基于时间编码的LSTM算法在舆情趋势预测上的准确率。最后，利用微博中的高校实时舆情事件对构建的模型预测效果进行评估，并动态调整评估参数，实现了对评估性能的优化，预测效果得到了显著提升。
易杰 +4 more
doaj +1 more source
, 2023 天然气压力能是一种新兴清洁能源，对其进行高效利用是节约能源、降低碳排放的有效手段。目前，天然气压力能回收利用中存在用能模式单一、评估指标片面以及评估方法缺乏等问题，导致天然气压力能利用率低，运行效益和系统不足无法被准确评估，行业发展受阻。首先，提出了天然气压力能综合利用方案，使用透平膨胀机回收压力能发电，降压过程中产生的冷能用于制冰，并加入太阳能热水系统提高出站气温度，提高能源利用效率。其次，基于分析模型并考虑经济性和环保性构建了压力能利用系统运行效益评估指标体系，对系统的运行状态进行全面、综合的评估 ...
张安安 +5 more
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Conservation Biology, EarlyView.Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta +24 more
wiley +1 more source
Perceived costs as drivers of wildlife management preferences in rural Tanzanian communities
Conservation Biology, EarlyView.Abstract Effectively managing human–wildlife interactions is crucial for fostering coexistence on shared landscapes. Management options are most effective when aligned with the preferences of people directly affected by wildlife, yet little is known about how socioecological factors influence these preferences.
Christian Kiffner +10 more
wiley +1 more source
Psychometric framework for coexistence with large carnivores
Conservation Biology, EarlyView.Abstract Human–carnivore coexistence is essential for biodiversity conservation, yet measuring the attitudes and behaviors that support it remains methodologically challenging. We developed psychometric scales to assess willingness to coexist with carnivores and the underlying beliefs of this coexistence through an iterative expert elicitation process ...
Benjamin Ghasemi +14 more
wiley +1 more source
Behavioral interventions to reduce demand for threatened freshwater turtles as pets
Conservation Biology, EarlyView.Abstract Growing demand for freshwater turtles as pets has fueled illegal trade and accelerated wild population declines, underscoring the need for theory‐based demand‐reduction interventions. We conducted a three‐part randomized controlled trial with active turtle keepers (n = 1800) in China to test conservation‐ and legality‐framed messages by ...
Wuji Zheng +9 more
wiley +1 more source
, 2006 通过深入研究建立了大尺度洪灾损失与影响评估指标体系,构建了大尺度洪灾损失与影响预估的方法体系,即通过数值模拟确定大尺度洪水的淹没特征．根据土地利用类型与承灾体类型在空间上的对应分布特点实现了社会经济统计数据的空间化,通过GIS软件的空间分析功能完成大尺度洪灾社会影响和经济财产损失的空间化评估．黄河下游存在发生大尺度洪灾的可能,其洪水管理需要洪灾损失与影响的预评估,但黄河下游目前尚没有比较合适的洪灾预评估方法．经过对黄河下游北岸原阳在1958年型洪水下的模拟决溢洪水所造成的灾害损失与社会影响预估表明 ...
戴尔阜 +7 more
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