Subjects: Geosciences >> Geography submitted time 2020-01-06 Cooperative journals: 《干旱区地理》
Abstract：定量评估水资源开发潜力对掌握区域水资源开发现状、提高水资源利用率具有重要意义。通过选取水资源利用率、灌溉率、地表水控制率、人均占有水量、重复利用率、生活用水定额、供水量模数、生态环境用水率等8个重要指标，借助模糊综合评价模型对中亚五国水资源开发潜力进行定量分析。结果表明：中亚地区整体水资源开发利用处于中级阶段，开发潜力综合评分值为0.502 7，表明开发潜力较大。其中，哈萨克斯坦水资源综合评分值最高，为0.712 4，有很大的开发潜力，但要注意摒弃不合理的水资源利用方式；吉尔吉斯斯坦和塔吉克斯坦综合评分值分别为0.591 1、0.488 7，有较大的开发潜力，但应注意由广度开发逐渐向深度开发转变。下游国家土库曼斯坦和乌兹别克斯坦处于开发利用的高级阶段，综合评分值分别为0.352 6、0.315 0，水资源开发潜力较小。今后应注意发展节水型经济，注重水资源综合管理。
Subjects: Biology >> Botany >> Applied botany submitted time 2020-03-24 Cooperative journals: 《广西植物》
Abstract：大花铁线莲是我国东北地区兼具优良观赏性状及药用价值的野生植物资源。为了研究野生大花铁线莲在引种地的开花进程和传粉规律，探讨引种环境对其开花特性的影响，于2017年和2018年间对大花铁线莲在个体、群体水平的开花物候和传粉特性进行了连续两年的观测和统计。结果表明：（1）大花铁线莲的群体花期在5月中旬至6月中下旬，两年个体开花进程基本相似，均呈单峰曲线；群体始花期和末花期时间较短，而盛花期时间较长，约为20 d左右，单株花期为5~7 d，种群花期长达30 d以上。群体开花比例呈现先升后降的变化趋势，累计开花比例在开花后一周左右达到100%。 两年的开花同步指数（Si）分别为 0.76和0.74，说明大花铁线莲两年间的开花特性差异较小。（2）大花铁线莲访花昆虫主要有6目13科18种，它们在访花频率、访花行为以及在单花停留时间上都有一定的差异。传粉昆虫主要是8种，分属于3目4科。中华蜜蜂、食蚜蝇和短尾管食蚜蝇访花频率高，在单花上停留时间较长，可以初步认定它们在对大花铁线莲的花粉传播中有重要作用。通过对大花铁线莲开花特性和访花昆虫的观查以及盗蜜昆虫行为的研究，为大花铁线莲的迁地保护和引种栽培提供科学依据。
Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2017-12-27 Cooperative journals: 《南方医科大学学报》
Abstract： Objective To evaluate the therapeutic effect of three-dimensional digital orthopedic techniques in treatment of acetabular fractures. Methods We retrospectively analyzed 50 cases of acetabular fracture treated between March, 2007 and December, 2013. The lamellar CT scanning data were imported into Mimics software, and 3D anatomical models of the pelvic and proximal femur were reconstructed. Computer-assisted analysis was carried out to understand the condition of fractures and simulate fracture reduction. The pelvic models were manufactured by rapid prototyping technique for definite diagnosis and typing of acetabular fractures and subsequent surgical treatment. Results Three-dimensional reconstruction images and rapid prototyping pelvic models faithfully represented the findings in operations. Preoperative simulation of the operation shortened the time of operation and reduced the volume of bleeding in the operation. All the patients were followed up for 6 to 24 months. According to Matta imaging score, anatomical reduction was achieved in 41 cases and satisfactory reduction in 9 cases. According to the Harris functional criteria, 32 patients had excellent, 12 had good and 6 had acceptable outcomes with a rate of excellent and good outcomes of 88% . Conclusion Three-dimensional digital orthopedic techniques allow accurate display of the acetabulum and the spatial relation of the anatomic structures to assist in fracture diagnosis, typing and treatment.
Hits
Hits
Downloads
Comment