Taking the area within 10 km along Beijing section of Jingcheng expressway as study area, this paper calculates the area changes and conversions of landuse types based on the land use map derived from TM images of 1995, 2004 and 2009, and analyze the variation of ecosystem services value of landuse types. The following results are gotten:(1) the construction of the expressway hadadramatic influence to the land use types along and the agricultural structure change obviously; (2) The total value is 20.77×108Yuan in 1995, and increased to 20.96×108 Yuan in 2004, then decreased to20.78×108 Yuan in 2009; (3)The reduction of cultivated land and the increase of construction land were the most important reason for the loss of the ecosystem services value, but because of the increase of garden plot, the total ecosystem services value was stable and increased a littlefrom 1995 to 2009.

BackgroundWe performed an updated systematic review and meta-analysis to compare the outcomes of CHA and UCHA in patients with FNFs.MethodsWe searched 6 English databases (Cochrane Library, ScienceDirect, PubMed, Embase, Medline, and Web of Science) and 4 Chinese databases (CNKI, VIP, Wang Fang, and Sino Med) in July 2020. The quality of each study was assessed according to the Cochrane handbook of systematic reviews. Data were pooled as risk ratios (RRs) and weighted mean differences (WMDs) with 95% confidence intervals (95% CIs). We used the random-effects model despite the heterogeneity among the studies. Data regarding baseline characteristics, hip function, complications both prosthetic-related and common, and operative outcomes are reported. ResultsA total of 24 RCTs based on 22 trials involving 3119 patients (CHA, 1575; UCHA, 1544) were included. Patients in CHA group show better hip function with HHS within 6 weeks (WMD=9.097, 95% CI, 3.034-15.161; P<0.003), 3 months (WMD=3.347, 95% CI, 1.478-5.216; P<0.001), 12 months (WMD=2.183, 95% CI, 0.161-4.205; P=0.034). The pooled results show that CHA had lower rates of refracture (RR=0.227, 95% CI, 0.135-0.381; P<0.0001), subsidence or loosening (RR=0.295, 95% CI, 0.112,0.778; P<0.014) and revision (RR=0.468, 95% CI, 0.279-0.786; P=0.004). Furthermore, CHA group tend to have lower pain(VAS score) (WMD=-0.568, 95% CI, -0.897 to -0.239; P=0.001), lower rate of pressure injury(RR=0.432, 95% CI, 0.221-0.846; P=0.014) and mortality at 1 year after surgery(RR=0.852, 95% CI, 0.727-0.998; P=0.047). UCHA showed a shorter operative duration(WMD=8.739, 95% CI, 6.354-11.124; P<0.0001).ConclusionsThis meta-analysis demonstrates that CHA has better hip function, lower rates of refracture, subsidence or loosening, revision, pressure ulcer, pain and one-year mortality than UCHA, while UCHA has shorter operative duration.

The exploitation potential evaluation of reserved land resources suitable for cultivation is a scientific basis to conduct the land development and consolidation. Combining with the actual situation of Wuhua county of Guangdong province, based on the suitable evaluation for cultivation, this paper selects five evaluation factors from the perspective of project implementation such as the terrain slope, the road density, the irrigation condition of surrounding farmland, the nearest distance to farmland and the map spot area of the nearest farmland to build the evaluation index system, and evaluate the exploitation potential of the reserved land resources. According to the area of supplementary cultivated land and the grading unit of the administrative village, the exploitation potential of the reserved land resources in Wuhua is divided into three partitions. The evaluation results show that the exploitation potential of Wuhua county is 731 hectares under the productivity level of present and foreseeable period, including other grassland, inland beach and bare land, mainly distributed in the basin and river valley of midland. The potential grading results show that the potential area of gradeIis 586.54 hectares, which terrain is flat and given the first priority to exploitation; the potential area of gradeIIis 128.84 hectares, which distribution is scattered and is given the second priority to exploitation; the potential area of grade III is 15.62 hectares, which mainly distributed in mountainous region and could be alternative to exploitation. The research results can provide a reference for development and arrangement planning of reserve land resources in Wuhua county.

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