全程可控性定向挂线术治疗高位肛瘘的临床研究

目的：观察全程可控性定向挂线术治疗高位肛瘘的临床疗效。方法：将60例高位肛瘘患者随机分为治疗组和对照组,每组各30例。治疗组采用全程可控性定向挂线术治疗,对照组采用常规切开挂线术治疗。观察2组综合疗效、疼痛评分、Wexner便秘评分、肛管静息压（ARP）、肛管最大收缩压（AMCP）、创面愈合时间及脱线时间。结果：总有效率治疗组为93.33%（28/30）,对照组为100%（30/30）,2组比较,差异无统计学意义（P>0.05）。术后第8～14天及第15～21天治疗组视觉模拟评分量表（VAS）评分明显低于对照组,差异均有统计学意义（P＜0.05）。2组术前及术后1个月Wexner便秘评分比较,差异无统计学意义（P＜0.05）;但术后3个月治疗组Wexner便秘评分明显低于对照组,差异有统计学意义（P＜0.05）。2组术后ARP及AMCP较术前均有所下降,但治疗组较对照组下降幅度小,差异均有统计学意义（P＜0.05）。2组创面愈合时间及脱线时间比较,差异均无统计学意义（P>0.05）。结论：全程可控性定向挂线术与传统切开挂线相比,在维护肛门形态、减轻术后疼痛和保护肛门括约肌功能方面有明显优势。     

针对无人机倾斜摄影数据的不同处理软件空三加密

以山西省右玉县杀虎口古长城为例,采用Trimble UX5 HP搭载Sony A7r相机完成数据采集,利用Context Capture软件和PhotoMesh软件进行三维重建,并利用Geomagics软件对三维模型进行精细处理,比较两种软件的空三精度,得出Context Capture软件的空三精度更高。同时利用外业实测检查点对模型进行精度计算,得到Context Capture软件的模型精度,其点位中误差为0.192 m,表明这种方法可以满足实景三维建立模型的要求,为智慧城市的建设提供了强有力的数据保障。     

GeoNat v1.0: A dataset for natural feature mapping with artificial intelligence and supervised learning

Machine learning allows “the machine” to deduce the complex and sometimes unrecognized rules governing spatial systems, particularly topographic mapping, by exposing it to the end product. Often, the obstacle to this approach is the acquisition of many good and labeled training examples of the desired result. Such is the case with most types of natural features. To address such limitations, this research introduces GeoNat v1.0, a natural feature dataset, used to support artificial intelligence‐based mapping and automated detection of natural features under a supervised learning paradigm. The dataset was created by randomly selecting points from the U.S. Geological Survey’s Geographic Names Information System and includes approximately 200 examples each of 10 classes of natural features. Resulting data were tested in an object‐detection problem using a region‐based convolutional neural network. The object‐detection tests resulted in a 62% mean average precision as baseline results. Major challenges in developing training data in the geospatial domain, such as scale and geographical representativeness, are addressed in this article. We hope that the resulting dataset will be useful for a variety of applications and shed light on training data collection and labeling in the geospatial artificial intelligence domain.     

A multi‐modal transportation data‐driven approach to identify urban functional zones: An exploration based on Hangzhou City,China

Recent urban studies have used human mobility data such as taxi trajectories and smartcard data as a complementary way to identify the social functions of land use. However, little work has been conducted to reveal how multi‐modal transportation data impact on this identification process. In our study, we propose a data‐driven approach that addresses the relationships between travel behavior and urban structure: first, multi‐modal transportation data are aggregated to extract explicit statistical features; then, topic modeling methods are applied to transform these explicit statistical features into latent semantic features; and finally, a classification method is used to identify functional zones with similar latent topic distributions. Two 10‐day‐long “big” datasets from the 2,370 bicycle stations of the public bicycle‐sharing system, and up to 9,992 taxi cabs within the core urban area of Hangzhou City, China, as well as point‐of‐interest data are tested to reveal the extent to which different travel modes contribute to the detection and understanding of urban land functions. Our results show that: (1) using latent semantic features delineated from the topic modeling process as the classification input outperforms approaches using explicit statistical features; (2) combining multi‐modal data visibly improves the accuracy and consistency of the identified functional zones; and (3) the proposed data‐driven approach is also capable of identifying mixed land use in the urban space. This work presents a novel attempt to uncover the hidden linkages between urban transportation patterns with urban land use and its functions.     

美洲黑石斑鱼含肉率及肌肉营养成分分析

利用常规肌肉营养测试方法,测定分析了美洲黑石斑鱼的含肉率及肌肉营养成分。测定结果显示,美洲黑石斑鱼含肉率平均值为(73.71±1.93)%,肌肉(鲜样)中粗蛋白、粗脂肪、水分和粗灰分含量分别为(19.09±1.34)%,(6.14±1.76)%,(71.86±1.58)%和(1.32±0.17)%;美洲黑石斑鱼肌肉中被测出的常见氨基酸(色氨酸未测定)有17种,其中包括7种必需氨基酸、2种半必需氨基酸和8种非必需氨基酸,其氨基酸含量占鲜体质量的百分比分别为(8.27±0.21)%,(1.84±0.08)%和(10.15±0.31)%,17种氨基酸总含量为(20.26±1.13)%(鲜样)。谷氨酸(Glu)含量占鲜体质量的百分比最高,为(3.27±0.16)%,其次是天冬氨酸(Asp)和赖氨酸(Lys),胱氨酸(Cys)含量占鲜体质量的百分比为最低,仅为(0.27±0.01)%。4种鲜味氨基酸含量占干样的(29.32±0.14)%。鲜样的美洲黑石斑鱼必需氨基酸总量占氨基酸总量的比值为40.82%,干样的为40.81%;鲜样的必需氨基酸总量与非必需氨基酸总量的比值为81.48%,干样的为81.43%,其构成符合FAO/WHO的标准。同时计算出的美洲黑石斑鱼肌肉蛋白质氨基酸评分(AAS)均大于1,化学评分(CS)均大于0.7,必需氨基酸指数(EAAI)达到91.18,高于多数海产经济鱼类,说明它能为人体提供大量必需氨基酸,且其组成接近人体的氨基酸需要量模式。美洲黑石斑鱼肌肉中主要含有16种脂肪酸,其中饱和脂肪酸(SFA)7种,含量占肌肉脂肪酸总量的(38.66±1.22)%;不饱和脂肪酸(UFA)9种,含量占肌肉脂肪酸总量的(61.36±0.98)%,其中单不饱和脂肪酸(MUFA)5种,多不饱和脂肪酸(PUFA)4种。多不饱和脂肪酸中的人和动物生长发育必需的脂肪酸EPA和DHA含量,分别占总脂肪酸的(9.02±0.59)%和(11.73±0.43)%。-ω3族与-ω6族PUFA总量的比值为5.30。分析表明,美洲黑石斑鱼肌肉含肉率高,含有较多的粗蛋白和粗脂肪,氨基酸总量及鲜味氨基酸含量均较高,是一种优质蛋白源;美洲黑石斑鱼肌肉富含PUFA,尤其是EPA和DHA含量丰富,并且∑n3/∑n6值较高,因而具有较高的食用营养价值和保健功效,是一种具有广阔市场前景的优良养殖品种。     

Microsatellite DNA polymorphisms and the relation with body weight in sea cucumber Apostichopus japonicus

The relationship between microsatellite polymorphism and body weight of captive bred Chinese sea cucumber Apostichopus japonicus was investigated in two local populations in Dalian.Among ten loci discovered, nine show changes except for A J07 loci. Seven loci were found highly polymorphic in both populations. For each locus in two populations, the average number of alleles is 6.428 6 and 6.285 7, the average observed heterozygosity at 0.225 7 and 0.245 9, the expected heterozygosity at 0.776 8 and 0.748 8, the polymorphism information content (PIC) at 0.709 2 and 0.674 6, respectively. Further analysis show significant correlation between A. japonicus body weight and occurrence markers AJ02 and AJ04. The findings of the relation may be helpful for molecular breeding,as well as the marker-assisted selection of sea cucumbers.     

Analysis of raft foundation design based on considering influence of superstructure stiffness

The finite element method was used for analysis of raft foundation design in high-rise building. Compared with other conventional methods, this method is more adapted to the practical condition since both superstructure stiffness and soil conditions were considered in calculation. The calculation results by example show that the base reaction is more uniform and the maximum reaction decreases obviously. Accordingly, the raft foundation design is more economic without any loss of security for high-rise building.     

ISO9660光盘文件系统在COSIX操作系统上的实现

分析了COSIX文件系统的主要结构和工作原理,阐述了CD-ROM文件系统的组成结构和实现原理。在COSIX文件系统的基础上设计和实现了光盘文件系统,为用户提供了一致的访问方式,访问符合IS09660标准的CD-ROM上的文件。     

基于均方误差最小的卡尔曼滤波实用算法

卡尔曼滤波在各种动态数据处理中应用广泛,为了使滤波结果更加接近实际情况,在经典卡尔曼滤波的基础上,提出均方误差作为评价标准的卡尔曼滤波实用算法。通过经典卡尔曼滤波和该算法对数据处理结果的分析,表明该算法的滤波结果更加有效。     

“新昆明坐标系”的椭球定位和坐标方位角研究

介绍"新昆明坐标系"的椭球定位及参数,分析与国家大地基准的关系,对坐标方位角进行研究.选取"新昆明坐标系"具有代表性的3个高程归箅面,计算方位角与80西安坐标系的变化量.通过研究表明,"昆明坐标系"在一定的范围内,其方位角与国家坐标系的方位角基本保持一致,完全能满足各类工程建设控制测量的要求.