Results 41 to 50 of about 19,300 (166)
Zhejiang Daxue xuebao. Lixue ban, 2002 从陆西凹陷的实际资料出发,分析了裂缝在油气勘探中的作用及不同类型裂缝的特征,研究了影响构造裂缝发育的因素,认为构造裂缝的发育受构造部位、孔隙度、断层等多种因素的影响,探讨了裂缝发育程度与相关影响因素之间的定量关系,给出了拟合求曲率的方法、与最近断层距离的计算方法,建立了裂缝密度的定量化预测方法--拟合曲率综合预测裂缝方法和相应的评价标准,并对陆西凹陷的裂缝分布进行预测.
WANGXue-jun(王学军) +5 more
doaj +1 more source
, 2004 探讨冠状动脉造影同时行肾动脉造影的必要性及动脉粥样硬化性肾动脉狭窄的相关危险因素分析。共 4 91例临床疑似冠心病患者行冠状动脉造影同时行非选择性或选择性肾动脉造影 ,并对相关的临床因素进行评价 ,筛选出动脉粥样硬化性肾动脉狭窄的独立危险因素。冠心病组患者中动脉粥样硬化性肾动脉狭窄的发病率为2 0 % ,显著高于非冠心病组 (2 .6 % )。冠心病、外周血管疾病是动脉粥样硬化性肾动脉狭窄的独立危险因素 (多元Logistic回归分析示 ,P
刘文辉 +7 more
core
Clinical management of heart failure with improved ejection fraction: treatment and maintenance [PDF]
In patients with heart failure with reduced ejection fraction (HFrEF), some individuals demonstrate significant improvement in left ventricular ejection fraction (LVEF) during subsequent evaluations after treatment.
JIANG Meng, SHEN Yiming, XU Tianyun
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自我效能感在大学生不合理信念与压力易感性中的中介作用 [PDF]
, 2014 Objective: To explore Mediating Effect between the college students' irrational beliefs and stress susceptibility. Method: 920 students which from different type of universities were assessed with the stress susceptibility assessment scale, irrational ...
Liu, Jing-yi, Xie, Nian-xiang
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Compliance in Regulatory Gray Areas: The Case of the Organic Seed Standard
Policy Studies Journal, EarlyView.ABSTRACT Adaptive regulations, designed to balance flexibility with accountability, can embed provisions that unintentionally leave room for firms to shirk on their responsibilities by exploiting flexibility. We call these provisions “regulatory gray areas,” and ask: how should we understand (non‐)compliance in adaptive regulatory settings?
Liza Wood +3 more
wiley +1 more source
Spatially Downscaling of Future Food Demand for Policy Planning
World Food Policy, Volume 12, Issue 1, May 2026.ABSTRACT Understanding the subnational dynamics of food demand, while accounting for the evolution of the agrifood system at the global level, remains a challenge for designing food policy to ensure food security. To link global agrifood systems with subnational food policy planning, we downscale per capita food demand for 62 food commodities at the ...
Chun Song +3 more
wiley +1 more source
Gaoya dianqi, 2021 建立一种粒子群优化的改进加权支持向量回归的变压器顶层油温模型,能够准确的估计变压器顶层油温。该模型根据环境温度、变压器负荷、变压器顶层油温等样本数据建立支持向量回归模型,分析变压器顶层油温与其他各因素之间的联系,根据不同影响因素建立支持向量超平面将变压器顶层油温预测限制在一个合理区间,根据支持向量机的惩罚因子和松弛因子的选择使该区间缩小至与实际变压器顶层油温的误差达到最小,使以变压器顶层油温为预测目标函数的预测模型精度最高 ...
李诗勇 +6 more
doaj
Relationship Between Peripheral Blood T Lymphocyte Subsets and Prognosis of Patients with Advanced Non-small Cell Lung Cancer Treated with Camrelizumab [PDF]
Objective To explore the relationship between peripheral blood T lymphocyte subsets and prognosis of patients with advanced non-small cell lung cancer (NSCLC) who received treatment with camrelizumab.
DONG Changhong +4 more
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International Journal of Applied Linguistics, Volume 36, Issue 2, Page 979-994, May 2026.ABSTRACT Previous research has established the relationships between motivation, anxiety, teachers’ support, and self‐regulated learning (SRL) in English‐as‐a‐foreign‐language (EFL) learning. Most of the studies, however, have taken a variable‐centered approach in addressing the variable correlations, while learners’ characteristics and variable links ...
Yuhong Jiao, Barry Bai, Jing Li
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2017 【目的】探讨影响可切除的肢端黑色素瘤患者预后的危险因素，建立预测模型并验证其预测价值。【方法】回 顾性分析2001年1月至2011年8月在中山大学肿瘤防治中心接受根治性手术切除的232例肢端黑色素瘤患者的临床病理 特征及术前炎症指标，应用COX比例风险回归模型分析预后影响因素并在此基础上建立预测模型，采用Kaplan-Meier法绘 制生存曲线并对组间差异进行log-rank检验，通过ROC曲线下面积（AUC）评价模型的预测准确度。【结果】通过COX比例风 险回归模型分析显示年龄、LDH ...
王尧 +6 more
doaj