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| 1 | Cold-chain food contamination as the possible origin of COVID-19 resurgence in Beijing显示文摘COVID-19,caused by SARS-CoV-2[1,2],has been contained in China through stringent non-pharmaceutical interventions.Border control and quarantine have effectively prevented the virus from being spread by infected travellers,but the risk of resurgence caused by other routes of introduction and transmission remains unclear,and current strategies to prevent resurgence could be flawed.Since July,SARS-CoV-2 RNA contaminations in frozen food imported from countries with ongoing epidemics have been reported in nine provinces in China[3,4].However,there is no robust evidence of COVID-19 outbreaks initiated by environmentto-human transmission.Here we add to evidence of such transmission by investigating the recent COVID-19 resurgence in Beijing. | Xinghuo Pang Lili Ren Shuangsheng Wu Wentai Ma Jian Yang Lin Di Jie Li Yan Xiao Lu Kang Shichang Du Jing Du Jing Wang Gang Li Shuguang Zhai Lijuan Chen Wenxiong Zhou Shengjie Lai Lei Gao Yang Pan Quanyi Wang Mingkun Li Jianbin Wang Yanyi Huang Jianwei Wang COVID-19 Field Response Group COVID-19 Laboratory Testing Group | 2020 | National Science Review2020，7，12： | 51 |
| 2 | BMP-6 inhibits microRNA-21 expression in breast cancer through repressing 6EF1 and AP-1显示文摘 | Jun Du Shuang Yang Di An Fen Hu Wei Yuan Chunli Zhai Tianhui Zhu | 2009 | Cell Research2009，19，4： | 44 |
| 3 | An Interdisciplinary Nutrition Support Team Improves Clinical and Hospitalized Outcomes of Esophageal Cancer Patients with Concurrent Chemoradiotherapy显示文摘 | Ming-Hua Cong Shu-Luan Li Guo-Wei Cheng Jin-Ying Liu Chen-Xin Song Ying-Bing Deng Wei-Hu Shang Di Yang Xue-Hui Liu Wei-Wei Liu Shi-Yan Lu Lei Yu | 2015 | Chinese Medical Journal2015，，22： | 41 |
| 4 | Anisotropic coding metamaterials and their powerful manipulation of differently polarized terahertz waves显示文摘Metamaterials based on effective media can be used to produce a number of unusual physical properties(for example,negative refraction and invisibility cloaking)because they can be tailored with effective medium parameters that do not occur in nature.Recently,the use of coding metamaterials has been suggested for the control of electromagnetic waves through the design of coding sequences using digital elements‘0’and‘1,'which possess opposite phase responses.Here we propose the concept of an anisotropic coding metamaterial in which the coding behaviors in different directions are dependent on the polarization status of the electromagnetic waves.We experimentally demonstrate an ultrathin and flexible polarization-controlled anisotropic coding metasurface that functions in the terahertz regime using specially designed coding elements.By encoding the elements with elaborately designed coding sequences(both 1-bit and 2-bit sequences),the x-and y-polarized waves can be anomalously reflected or independently diffused in three dimensions.The simulated far-field scattering patterns and near-field distributions are presented to illustrate the dual-functional performance of the encoded metasurface,and the results are consistent with the measured results.We further demonstrate the ability of the anisotropic coding metasurfaces to generate a beam splitter and realize simultaneous anomalous reflections and polarization conversions,thus providing powerful control of differently polarized electromagnetic waves.The proposed method enables versatile beam behaviors under orthogonal polarizations using a single metasurface and has the potential for use in the development of interesting terahertz devices. | Shuo Liu Tie Jun Cui Quan Xu Di Bao Liangliang Du Xiang Wan Wen Xuan Tang Chunmei Ouyang Xiao Yang Zhou Hao Yuan Hui Feng Ma Wei Xiang Jiang Jiaguang Han Weili Zhang Qiang Cheng | 2016 | Light(Science & Applications)2016，5，1： | 36 |
| 5 | SIRT6 safeguards human mesenchymal stem cells from oxidative stress by coactivating NRF2显示文摘 | Huize Pan Di Guan Xiaomeng Liu Jingyi Li Lixia Wang Jun Wu Junzhi Zhou Weizhou Zhang Ruotong Ren Weiqi Zhang Ying Li Jiping Yang Ying Hao Tingting Yuan Guohong Yuan Hu Wang Zhenyu Ju Zhiyong Mao Jian Li Jing Qu FuchouTang Guang-Hui Liu | 2016 | Cell Research2016，26，2： | 32 |
| 6 | Methodological quality(risk of bias) assessment tools for primary and secondary medical studies: What are they and which is better?显示文摘Methodological quality(risk of bias)assessment is an important step before study initiation usage.Therefore,accurately judging study type is the first priority,and the choosing proper tool is also important.In this review,we introduced methodological quality assessment tools for randomized controlled trial(including individual and cluster),animal study,non-randomized interventional studies(including follow-up study,controlled before-and-after study,before-after/pre-post study,uncontrolled longitudinal study,interrupted time series study),cohort study,case-control study,cross-sectional study(including analytical and descriptive),observational case series and case reports,comparative effectiveness research,diagnostic study,health economic evaluation,prediction study(including predictor finding study,prediction model impact study,prognostic prediction model study),qualitative study,outcome measurement instruments(including patient-reported outcome measure development,content validity,structural validity,internal consistency,cross-cultural validity/measurement invariance,reliability,measurement error,criterion validity,hypotheses testing for construct validity,and responsiveness),systematic review and meta-analysis,and clinical practice guideline.The readers of our review can distinguish the types of medical studies and choose appropriate tools.In one word,comprehensively mastering relevant knowledge and implementing more practices are basic requirements for correctly assessing the methodological quality. | Lin-Lu Ma Yun-Yun Wang Zhi-Hua Yang Di Huang Hong Weng Xian-Tao Zeng | 2020 | Military Medical Research2020，7，3： | 32 |
| 7 | The effect of oxidative stress in myocardial cell injury in mice exposed to chronic intermittent hypoxia显示文摘背景妨碍的睡觉呼吸暂停症候群(OSAS ) 是为心血管的疾病的一个重要风险因素。长期的断断续续的组织缺氧(CIH ) 被认为是在 OSA 病人的心血管的疾病的最重要的原因之一。这个重复组织缺氧和氧化周期类似于 hypoxia-reperfusion 损害,它开始氧化应力。在这研究,我们观察了 CIH 和 N-acetylcysteine (NAC ) 的效果导致的 cardiocytes 损害。三十只 ICR 老鼠随机被分到 3 个组的方法:控制, CIH 和 NAC (CIH+NAC ) 组。Malondialdehyde (MDA ) 和 cardiocyte homogenates 的 superoxide dismutase (草皮) 被测量。浆液类脂化合物被一个仪器方法测量。浆液心脏的 troponin (cTnl ) 我被连接酶的 immunosorbent 试金(ELISA ) 检测。心肌层病理学的节是草皮活动和在 CIH 的 cardiocyte homogenates 的 MDA 集中组织的 observed.Results (1 ) 比在另外的组显著地高(P < 0.005 ) 。NAC 组的 MDA 集中比控制组的低(P < 0.01 ) 。(2 ) CIH 和 NAC 组的浆液 cTnl 集中比控制组的显著地高(P < 0.01 ) 。(3 ) 在 NAC 组的浆液 triglyceride 层次比在另外的组低(P < 0.01 ) ,当在低密度脂蛋白和高密度没有重要差别时,在三之中的脂蛋白组织。(4 ) 心肌层,模糊的横向的有条纹或刻痕之状态,和织物流出的退化在 CIH 和 NAC 组在织物节被观察。然而,正常织物在 CIH 导致的氧化压力能伤害的控制 group.Conclusion 被发现 cardiocytes 和损害效果罐头被 NAC 部分禁止。 | LIU Jian-nan ZHANG Jie-xin LU gan QIU Yan YANG Di YIN Guo-yong ZHANG Xi-long | 2010 | Chinese Medical Journal2010，，1： | 25 |
| 8 | Latest Progress of the Chinese Meteorological Satellite Program and Core Data Processing Technologies显示文摘In this paper,the latest progress,major achievements and future plans of Chinese meteorological satellites and the core data processing techniques are discussed.First,the latest three FengYun(FY)meteorological satellites(FY-2H,FY-3D,and FY-4A)and their primary objectives are introduced Second,the core image navigation techniques and accuracies of the FY meteorological satellites are elaborated,including the latest geostationary(FY-2/4)and polar-orbit(FY-3)satellites.Third,the radiometric calibration techniques and accuracies of reflective solar bands,thermal infrared bands,and passive microwave bands for FY meteorological satellites are discussed.It also illustrates the latest progress of real-time calibration with the onboard calibration system and validation with different methods,including the vicarious China radiance calibration site calibration,pseudo invariant calibration site calibration,deep convective clouds calibration,and lunar calibration.Fourth,recent progress of meteorological satellite data assimilation applications and quantitative science produce are summarized at length.The main progress is in meteorological satellite data assimilation by using microwave and hyper-spectral infrared sensors in global and regional numerical weather prediction models.Lastly,the latest progress in radiative transfer,absorption and scattering calculations for satellite remote sensing is summarized,and some important research using a new radiative transfer model are illustrated. | Peng ZHANG Qifeng LU Xiuqing HU Songyan GU Lei YANG Min MIN Lin CHEN Na XU Ling Sun Wenguang BAI Gang MA Di XIAN | 2019 | Advances in Atmospheric Sciences2019，36，9： | 26 |
| 9 | Postharvest Treatment with β-Aminobutyric Acid Induces Resistance Against Dry Rot Caused by Fusarium sulphureum in Potato Tuber显示文摘The effectiveness of postharvest β-aminobutyric acid (BABA) treatment was studied for inducing resistance against dry rot caused by Fusarium sulphureum in tubers and slices of two potato cultivars (resistant cultivar Shepody and susceptible cultivar Xindaping). The results showed that BABA at 100 mmol L-1 significantly reduced lesion diameter in inoculated both tubers and slices. The chemical at 100 mmol L-1 showed an effective reduction in infection ability of F. sulphureum inoculated 48 and 72 h after treatment in slices of resistant cultivar, and 72 and 96 h in susceptible ones. BABA increased the activitives of peroxidase (POD), polyphenoloxidase (PPO) and phenylalanine ammonialyase (PAL), and accumulated the contents of lignin, flavonoids and phenolics in slices. The resistant cultivar had a stronger resistant response than the susceptible one. These findings suggest that the BABA treatment can induce the resistance in potato tubers, however, the inducing degree depends on the original level of resistance present in each cultivar. | YIN Yan LI Yong-cai BI Yang CHEN Song-jiang LI Ying-chao YUAN Li WANG Yi WANG Di | 2010 | Agricultural Sciences in China2010，9，9： | 24 |
| 10 | Strontium fructose 1,6-diphosphate prevents bone loss in a rat model of postmenopausal osteoporosis via the OPG/RANKL/RANK pathway显示文摘瞄准: 评估锶的保护的效果果糖 1,6-diphosphate (FDP-Sr ) ,联合的新奇的锶盐果糖有锶的 1,6-diphosphate (FDP ) ,在在骨头损失的一个导致卵巢切除术的模型的骨头上。 | BO MA Qi ZHANG Di WU Yong-lu WANG Ying-ying HU Yan-ping CHENG Zhen-dong YANG Ya-ya ZHENG Han-jie YING | 2012 | Acta Pharmacologica Sinica2012，33，4： | 24 |
| 11 | Epidemiology of Diabetes in Adults Aged 35 and Older from Shanghai,China显示文摘Objective This study aimed to investigate the epidemiology of diabetes in adults from Shanghai, aged 35 and older, in 2013. Methods We estimated the diabetes prevalence in a representative sample of 18,736 adults who were selected through a multistage stratified cluster sampling process. A standard questionnaire containing questions about demographic characteristics and lifestyle factors was distributed. After an overnight fast of at least 10 hours, a venous blood sample was collected from each participant. For each patient without a history of diabetes, another blood sample was drawn 120 min after an oral glucose tolerance test to identify undiagnosed diabetes and prediabetic condition. Results Among Shanghai residents aged 35 and above, the overall weighted prevalence of diabetes was 17.6% [95% confidence interval(CI): 16.4%-18.8%]. The prevalences were 19.3% in men and 15.8% in women as well as 19.1%, 15.4%, and 16.1% in urban, suburban, and rural residents, respectively. In addition, the weighted prevalence of prediabetes was 16.5%(95% CI: 15.3%-17.8%), with the prevalences of 16.5% in men, 16.6% in women, 15.2% in urban residents, 18.0% in suburban residents, and 18.5% in rural residents. Among all patients with diabetes, 68.1%(95% CI: 64.3%-71.6%) were aware of their status, 63.5%(95% CI: 60.0%-66.9%) received diabetes treatment, but only 35.1%(95% CI: 32.4%-37.8%) had adequate glycemic control. Conclusion In Shanghai, diabetes and prediabetes are highly prevalent. However, 1/3rd of diabetes cases are undiagnosed, and the rate of glycemic control is low. | RUAN Ye YAN Qing Hua XU Ji Ying YANG Qun Di YAO Hai Hong LI Rui SHI Yan | 2016 | Biomedical and Environmental Sciences2016，29，6： | 22 |
| 12 | Individualized prediction of perineural invasion in colorectal cancer: development and validation of a radiomics prediction model显示文摘Objective: To develop and validate a radiomics prediction model for individualized prediction of perineural invasion(PNI) in colorectal cancer(CRC).Methods: After computed tomography(CT) radiomics features extraction, a radiomics signature was constructed in derivation cohort(346 CRC patients). A prediction model was developed to integrate the radiomics signature and clinical candidate predictors [age, sex, tumor location, and carcinoembryonic antigen(CEA) level]. Apparent prediction performance was assessed. After internal validation, independent temporal validation(separate from the cohort used to build the model) was then conducted in 217 CRC patients. The final model was converted to an easy-to-use nomogram.Results: The developed radiomics nomogram that integrated the radiomics signature and CEA level showed good calibration and discrimination performance [Harrell's concordance index(c-index): 0.817; 95% confidence interval(95% CI): 0.811–0.823]. Application of the nomogram in validation cohort gave a comparable calibration and discrimination(c-index: 0.803; 95% CI: 0.794–0.812).Conclusions: Integrating the radiomics signature and CEA level into a radiomics prediction model enables easy and effective risk assessment of PNI in CRC. This stratification of patients according to their PNI status may provide a basis for individualized auxiliary treatment. | Yanqi Huang Lan He Di Dong Caiyun Yang Cuishan Liang Xin Chen Zelan Ma Xiaomei Huang Su Yao Changhong Liang Jie Tian Zaiyi Liu | 2018 | Chinese Journal of Cancer Research2018，30，1： | 23 |
| 13 | Rice CYP703A3, a cytochrome P450 hydroxylase, is essential for development of anther cuticle and pollen exine显示文摘Anther cuticle and pollen exine act as protective envelopes for the male gametophyte or pollen grain, but the mechanism underlying the synthesis of these lipidic polymers remains unclear. Previously, a tapetum‐expressed CYP703A3, a putative cytochrome P450 fatty acid hydroxylase, was shown to be essential for male fertility in rice(Oryza sativa L.). However,the biochemical and biological roles of CYP703A3 has not been characterized. Here, we observed that cyp703a3‐2 caused by one base insertion in CYP703A3 displays defective pollen exine and anther epicuticular layer, which differs from Arabidopsis cyp703a2 in which only defective pollen exine occurs. Consistently, chemical composition assay showed that levels of cutin monomers and wax components were dramatically reduced in cyp703a3‐2 anthers. Unlike the wide range of substrates of Arabidopsis CYP703A2, CYP703A3 functions as an in‐chain hydroxylase only for a specific substrate, lauric acid, preferably generating 7‐hydroxylated lauric acid. Moreover, chromatin immunoprecipitation and expression analyses revealed that the expression of CYP703A3 is directly regulated by Tapetum Degeneration Retardation, a known regulator of tapetum PCD and pollen exine formation. Collectively, our results suggest that CYP703A3 represents a conserved and diversified biochemical pathway for in‐chain hydroxylation of lauric acid required for the development of male organ in higher plants. | Xijia Yang Di Wu Jianxin Shi Yi He Franck Pinot Bernard Grausem Changsong Yin Lu Zhu Mingjiao Chen Zhijing Luo Wanqi Liang Dabing Zhang | 2014 | Journal of Integrative Plant Biology2014，56，10： | 21 |
| 14 | Seasonal variations and size distributions of water-soluble ions in atmospheric aerosols in Beijing, 2012显示文摘The characteristics of water-soluble ions in airborne particulate matter in Beijing were investigated using ion chromatography. The results showed that the total concentrations of ions were 83.7 ± 48.9 μg/m3 in spring, 54.0 ± 17.0 μg/m3 in summer, 54.1 ± 42.9 μg/m3 in autumn, and 88.8 ± 47.7 μg/m3 in winter, respectively. Furthermore, out of all the ions, NO3-,SO42-and NH4+accounted for 81.2% in spring, 78.5% in summer, 74.6% in autumn, and 76.3%in winter. Mg2+and Ca2+were mainly associated with coarse particles, with a peak that ranged from 5.8 to 9.0 μm. Na+, NH4+and Cl-had a multi-mode distribution with peaks that ranged from 0.43 to 1.1 μm and 4.7 to 9.0 μm. K+, NO3-, and SO42-were mainly associated with fine particles, with a peak that ranged from 0.65 to 2.1 μm. The concentrations of Na+, K+,Mg2+, Ca2+, NH4+, Cl-, NO3-and SO42-were 2.69, 2.32, 1.01, 4.84, 16.9, 11.8, 42.0, and 44.1 μg/m3 in particulate matter(PM) on foggy days, respectively, which were 1.4 to 7.3 times higher than those on clear days. The concentrations of these ions were 2.40, 1.66, 0.92, 4.95, 17.5,7.00, 32.6, and 34.7 μg/m3 in PM on hazy days, respectively, which were 1.2–5.7 times higher than those on clear days. | Yongjie Yang Rui Zhou Jianjun Wu Yue Yu Zhiqiang Ma Lejian Zhang Yi'an Di | 2015 | Journal of Environmental Sciences2015，27，8： | 19 |
| 15 | Blocking the recruitment of naive CD4+ T cells reverses immunosuppression in breast cancer显示文摘渗入肿瘤的 Tregs 的起源,肿瘤免疫力的抑制的批评调停人,是不清楚的。这里,,我们证明在人的乳癌的渗入肿瘤的天真的 CD4 + T 房间和 Tregs 有重叠 TCR 全部剧目几乎别与传播 Tregs 重叠,建议 intratumoral Tregs 主要在 situ 而非从招募的 Tregs 从天真的 T 房间发展。而且,许多天真的 CD4 + T 房间和 Tregs 密切被相关,两个显示的穷人为乳癌病人的预后。天真的 CD4 + T 房间与许多生产 CCL18 巨噬细胞成比例遵守肿瘤片。而且,采纳地转移的人的天真的 CD4 + T 房间以一种 CCL18 依赖的方式渗入人的乳癌 orthotopic 异种皮移植。在在人性化的鼠标的人的乳癌异种皮移植,由将 PITPNM3 的表达式击倒堵住天真的 CD4 + T 房间的招募进肿瘤, CCL18 受体,显著地减少 intratumoral Tregs 并且禁止肿瘤前进。这些调查结果建议那个乳房渗入肿瘤的 Tregs 从在 situ 区分进 Tregs 的传播天真的 CD4 + T 房间的趋化性产生。由防碍 CCL18 的 PITPNM3 识别禁止天真的 CD4 + T 房间招募进肿瘤可以是为 anticancer 免疫疗法的吸引人的策略。 | Shicheng Su Jianyou Liao Jiang Liu Di Huang Chonghua He Fei Chen LinBing Yang Wei Wu Jianing Chen Ling Lin Yunjie Zeng Nengtai Ouyang Xiuying Cui Herui Yao Fengxi Su Jian-dong Huang Judy Lieberman Qiang Liu Erwei Song | 2017 | Cell Research2017，27，4： | 19 |
| 16 | Comparison of membrane fouling during short-term filtration of aerobic granular sludge and activated sludge显示文摘氧气的小粒的污泥被栽培采用定序批空运反应堆的内部传播。关于短期的膜在氧气的小粒的污泥系统和活性污泥系统之间犯规的对比的实验被调查。膜肮脏蚂蚁被 Fourier 变换也描绘红外线(FTIR ) 光谱学技术。结果证明氧气的小粒的污泥有优秀脱氮能力;TN 的移动效率能到达 90% 。氧气的小粒的污泥能减轻有效地犯规的膜。氧气的小粒的污泥的稳定的膜流动是两次像活性污泥系统的一样。另外,氧气的小粒的污泥能导致严重的膜,这被发现堵住毛孔然而,活性污泥能引起犯规的严重蛋糕。肮脏蚂蚁的主要部件作为蛋白质和多糖材料包括被识别。 | ZHOU Jun YANG Feng-lin MENG Fan-gang AN Peng WANG Di | 2007 | Journal of Environmental Sciences2007，19，11： | 18 |
| 17 | 包头市层级生态网络构建方法研究显示文摘以包头市为研究区,结合不同生态价值生境斑块的层级性,构建层级网络提取模型框架,选用合适的图论网络测度指标评价层级生态网络。结果表明:基于层级网络提取模型构建的包头市层级生态网络,所提取的第1、2、3层对应的潜在生态源地数量为8、31、123,第1、2、3层对应的潜在廊道数量为8、35、151,并确定对应的第1、2、3层生态节点数为7、28、47;计算α、β、γ指数,评价层次生态网络结构,随生态源地与廊道数量增加,网络中可供物质流动的回路增多,生态源地的平均连通度变好。针对半干旱区构建的层级生态网络,能够为包头市生态建设提供理论指导,对半干旱城市生态规划具有重要参考价值。 | 王戈 于强 YANG Di 张启斌 岳德鹏 刘建华 | 2019 | 农业机械学报2019，50，9： | 17 |
| 18 | Short-term memory of danger signals or environmental stimuli in mesenchymal stem cells: implications for therapeutic potential显示文摘间充质的 stem/stromal 房间(MSC ) 拥有有免疫力的房间的一些特征,包括支持 inflammatory 显型,抑制免疫力的显型,抗菌剂性质和像使用费的受体蛋白质的表示。这里,我们显示出那,类似于有免疫力的房间, MSC 为时间的一个时期从危险信号或环境刺激保留信息。当与支持 inflammatory 因素 lipopolysaccharide (LPS ) 或肿瘤坏死 factor-α 对待时;(TNF-α) , MSC 显示增加了 IL-6, IL-8 和 MCP-1 的表示。当刺激因素, IL-6 的表示, IL-8 和 MCP-1 不在时的后面的小块地 re 和几轮房间部门仍然保持比在未经治疗的房间高超过 7 天。当房间暴露于秒轮刺激时,在 cytokine 分泌物的尖铁发生了。我们与 LPS 和告知 LPS 的 MSC 告知 MSC 在在一只糖尿病的老鼠支持皮肤拍动幸存的治疗学的功效最好比的当模特儿 unprimed MSC。最后,我们发现包括 miR146a, miR150 和 miR155,与由 5-hydroxymethylcytosine (5hmC ) 的 DNA 的修正一起,几 microRNAs 调停对 LPS 和 TNF-α 的 MSC 反应;刺激。一起,我们的数据建议 MSC 有环境信号的短期的记忆,它可以影响他们的治疗学的潜力。 | Guang-Yang Liu Yang Liu Ying Lu Ya-Ru Qin Guo-Hu Di Yong-Hong Lei Hu-Xian Liu Yan-Qi Li Chutse Wu Xian-Wen Hu Hai-Feng Duan | 2016 | Cellular & Molecular Immunology2016，13，3： | 17 |
| 19 | 基于EnKF-MCRP模型的生态用地扩张模拟研究显示文摘以生态脆弱区典型县域磴口县为研究区,基于2002、2007、2012、2015年4期遥感影像解译数据,将数据同化技术引入生态源地的变化模拟中,考虑生态障碍和生态阻力构建En KF-MCRP模型,进行磴口县生态用地的变化模拟。结果表明,引入数据同化技术的En KF-CA/Markov模型的模拟总精度达到82.4%,数据同化能够减少误差的积累。根据扩展能力磴口县生态源地共分为5个等级,其中3、4、5级生态源地的空间布局形成东北-西南、西北-西南的沙漠化防护格局。引入生态源地变化的En KF-MCRP模型的生态用地扩张模拟精度最高,生态用地面积与空间布局最接近实际情况,方差达到0.4。此研究可为当前以及未来的生态用地规划和管理提供科学根据。 | 于强 岳德鹏 Di Yang 张启斌 马欢 李宇彤 | 2016 | 农业机械学报2016，47，9： | 17 |
| 20 | 基于复杂网络分析法的层级生态网络结构研究显示文摘以西北典型半干旱城市包头市为研究区,运用复杂网络的评价指标对包头市复杂层级网络的拓扑结构与空间鲁棒性进行评价,提取了第1、2、3级生态源地和第1、2、3层生态廊道,并识别了重要生态节点,构建了包头市层级生态网络。结果表明:第1、2、3层生态源地数量分别为8、31、123,生态廊道数量分别为8、35、151,重要生态节点数量分别为7、28、47。通过拓扑结构与空间鲁棒性分析可知:第1层生态网络连通度最低,核数为2,结构简单但重要性最高,其稳定性影响整个层级生态网络的稳定;第2层生态网络由于增加连通性较低的生态节点,可增加小尺度的生态稳定性,但对大尺度层级生态网络稳定性提升没有明显作用;第3层生态网络核数为4,生态网络连通性最高且结构复杂。在第1、2、3层网络恶意攻击比随机攻击的破坏性均更强。第2、3层生态网络中源地节点数量较多,但低等级源地比例高,对增强网络的抗打击能力与恢复能力效果不明显。 | 王戈 于强 YANG Di 张启斌 岳德鹏 刘建华 | 2019 | 农业机械学报2019，50，7： | 17 |
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