Subjects: Mechanics >> Solid Mechanics submitted time 2024-02-07 Cooperative journals: 《应用力学学报》
Abstract： Compared with shallow buried tunnel,the high stress caused by the increase of buried depth makes the safety evaluation of deep buried tunnel more complicated.Therefore,this paper designs and optimizes the bolt support mode of deep buried tunnel under impact load with the premise of in-situ stress balance by combining the finite and infinite elements.This paper not only studies the deformation characteristics of surrounding rock under impact load,but also analyzes the influence of length,density,length interval arrangement and key support of arch foot on the safety of tunnel.The results show that the Mises stress has almost no change before and after the in-situ stress balance,but the displacement is highly affected.When impact wave is loaded,the Mises stress first increases slightly with the increase of bolt length and density.When the length and density of the bolt increase to a certain value,the Mises stress no longer increases.The displacement and plastic strain of the cavern wall reach their minimum.In this case,the surrounding rock of the tunnel reaches a relatively safe state.Regarding to the bolt spacing,reasonable arrangement of short dense bolts is beneficial to the safety of tunnel,and the increase of the number of long anchors can improve the safety of the tunnel.This is due to the wide reinforcement range of long anchor to the surrounding rock.A high strength bearing layer is formed above the tunnel.It can withstand a large load,and transfer the load to the bottom of the straight wall.When the arch foot of the cavern is mainly supported,the displacement of the arch foot as well as the whole wall is reduced.
Subjects: Statistics >> Social Statistics submitted time 2023-12-04 Cooperative journals: 《智慧农业（中英文）》
CHENG Yuxin
XUE Bowen
KONG Yuanyuan
YAO Dongliang
TIAN Long
WANG Xue
YAO Xia
ZHU Yan
CAO Weixing
CHENG Tao
Abstract： Objective Rice blast is considered as the most destructive disease that threatens global rice production and causes severe economic losses worldwide. The detection of rice blast in an early manner plays an important role in resistance breeding and plant protection. At present, most studies on rice blast detection have been devoted to its symptomatic stage, while none of previous studies have used so‐lar-induced chlorophyll fluorescence (SIF) to monitor rice leaf blast (RLB) at early stages. This research was conducted to investigate the early identification of RLB infected leaves based on solar-induced chlorophyll fluorescence at different leaf positions. Methods Greenhouse experiments and field trials were conducted separately in Nanjing and Nantong in July and August, 2021, in order to record SIF data of the top 1th to 4th leaves of rice plants at jointing and heading stages with an Analytical Spectral Devices (ASD) spectrometer coupled with a FluoWat leaf clip and a halogen lamp. At the same time, the disease severity levels of the measured samples were manually collected according to the GB/T 15790-2009 standard. After the continuous wavelet transform (CWT) of SIF spectra, separability assessment and feature selection were applied to SIF spectra. Wavelet features sensitive to RLB were extracted, and the sensitive features and their identification accuracy of infected leaves for different leaf positions were compared. Finally, RLB identification models were constructed based on linear discriminant analysis (LDA). Results and Discussion The results showed that the upward and downward SIF in the far-red region of infected leaves at each leaf position were significantly higher than those of healthy leaves. This may be due to the infection of the fungal pathogen Magnaporthe oryzae, which may have destroyed the chloroplast structure, and ultimately inhibited the primary reaction of photosynthesis. In addition, both the upward and downward SIF in the red region and the far-red region increased with the decrease of leaf position. The sensitive wavelet features varied by leaf position, while most of them were distributed in the steep slope of the SIF spectrum and wavelet scales 3, 4 and 5. The sensitive features of the top 1th leaf were mainly located at 665-680 nm, 755-790 nm and 815-830 nm. For the top 2th leaf, the sensitive features were mainly found at 665-680 nm and 815-830 nm. For the top 3th one, most of the sensitive features lay at 690 nm, 755-790 nm and 815-830 nm, and the sensitive bands around 690 nm were observed. The sensitive features of the top 4th leaf were primarily located at 665-680 nm, 725 nm and 815-830 nm, and the sensitive bands around 725 nm were observed. The wavelet features of the common sensitive region (665-680 nm), not only had physiological significance, but also coincided with the chlorophyll absorption peak that allowed for reasonable spectral interpretation. There were differences in the accuracy of RLB identification models at different leaf positions. Based on the upward and downward SIF, the overall accuracies of the top 1th leaf were separately 70% and 71%, which was higher than other leaf positions. As a result, the top 1th leaf was an ideal indicator leaf to diagnose RLB in the field. The classification accuracy of SIF wavelet features were higher than the original SIF bands. Based on CWT and feature selection, the overall accuracy of the upward and downward optimal features of the top 1th to 4th leaves reached 70.13%、63.70%、 64.63%、64.53% and 70.90%、63.12%、62.00%、64.02%, respectively. All of them were higher than the canopy monitoring feature F760, whose overall accuracy was 69.79%, 61.31%, 54.41%, 61.33% and 69.99%, 58.79%, 54.62%, 60.92%, respectively. This may be caused by the differences in physiological states of the top four leaves. In addition to RLB infection, the SIF data of some top 3th and top 4th leaves may also be affected by leaf senescence, while the SIF data of top 1th leaf, the latest unfolding leaf of rice plants was less affected by other physical and chemical parameters. This may explain why the top 1th leaf responded to RLB earlier than other leaves. The results also showed that the common sensitive features of the four leaf positions were also concentrated on the steep slope of the SIF spectrum, with better classification performance around 675 and 815 nm. The classification accuracy of the optimal common features, ↑WF832,3 and ↓WF809,3, reached 69.45%, 62.19%, 60.35%, 63.00% and 69.98%, 62.78%, 60.51%, 61.30% for the top 1th to top 4th leaf positions, respectively. The optimal common features, ↑WF832,3 and ↓WF809,3, were both located in wavelet scale 3 and 800-840nm, which may be related to the destruction of the cell structure in response to Magnaporthe oryzae infection. Conclusions In this study, the SIF spectral response to RLB was revealed, and the identification models of the top 1th leaf were found to be most precise among the top four leaves. In addition, the common wavelet features sensitive to RLB, ↑WF832,3 and ↓WF809,3, were extracted with the identification accuracy of 70%. The results proved the potential of CWT and SIF for RLB detection, which can provide important reference and technical support for the early, rapid and non-destructive diagnosis of RLB in the field.
Subjects: Statistics >> Social Statistics submitted time 2023-12-04 Cooperative journals: 《中国科学院院刊》
Abstract： The state key laboratory is an important component of the national strategic scientific and technological strength. The CPC Central Committee made a major decision to reorganize the state key laboratory system, proposed to increase investment in the reorganized state key laboratory, and to reform support policies. Aiming to achieve sci-tech self-reliance and self-strengthening at higher levels, studying the funds allocation of state key laboratory in the new era has important practical and far-reaching significance. In the previous practice, China’s allocation of funds for state key laboratory has 4 problems, such as weak correlation between fund allocation and the mission orientation of institutions, high proportion of competitive funds, and so on. The restructured state key laboratory has 6 characteristics, including clear positioning and mission oriented. In order to solve the problem of adaptation between the previous situation of funding allocation and the characteristics and funding needs of the current state key laboratories after restructuring, learn from the useful experience of allocation of science and technology funding resources in European and American national laboratory system, based on China’s national conditions, 6 targeted measures and suggestions are proposed, including competition ahead, horizontal coordination and vertical coordination to strengthen resource allocation, and so on, for providing reference for science and technology policy formulation and laboratory restructuring.
Subjects: Nursing >> Nursing submitted time 2023-05-12
Abstract： Objective To investigate the related symptoms, symptom cluster and influencing factors among patients with gynecological cancer during chemotherapy. Methods A total of 430 inpatients with gynecological cancer treated by chemotherapy were investigated by using the General Information Questionnaire and Chinese version of M. D. Anderson Symptom Inventory (MDASI). Results There were many symptoms in gynecological cancer patients during chemotherapy. The top three symptom incidence were vomiting (91.86%), drowsiness (90.70%) and fatigue (90.00%). The top three incidence of symptomatic distress were walking (76.74%), interpersonal (76.30%) and emotion (72.79%). Four symptom groups were extracted by exploratory factor analysis, namely emotional symptom cluster, disease symptom cluster, fatigue symptom cluster and digestive tract symptom cluster. Multivariate stepwise regression analysis showed that metastasis, family monthly income, recurrence, expected hospital stay, number of chemotherapy, chemotherapy regimen, tumor staging and work status were the influencing factors of symptoms. Conclusion There are many symptoms in gynecological cancer patients during chemotherapy. Clinical nurses should start from the point of view of symptom cluster, and provide effective symptoms management measures for patients, to improve their quality of life.
Peer Review Status:
Awaiting Review
Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] To explore the gene-disease association of Alzheimer's disease (AD) in order to capture the potential research directions.[Method/process] An open knowledge discovery framework was constructed based on LBD theory. Combined with MeSH thesaurus, DisGeNET and other medical terms and group data, knowledge mining was carried out in AD literatures in PubMed. Association rules and algorithm sorting were used to screen strongly associated MeSH terms co-occurrence diseases and priority candidate genes for partial gene coincidence, results of time slicing and comparison with other LBD tools were used to verify them.[Result/conclusion] 88 334 AD literatures were identified and matched with 2 120 AD genes, 11 899 candidate genes and 992 comorbidity genes were identified according to XYZ analysis, 10 strongly associated co-occurrence diseases and 25 preferred candidate genes were refined and discussed in combination with literature reports. Mining the potential associations between target disease, co-occurrence diseases and genes by LBD can quickly capture the potential research directions, narrow the scopes of gene sequencing, and provide important guidance for the generations of new research hypotheses.
Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] Based on the author's descriptive evaluation of his research and the critical citations of later researchers, the abstract and citation corpus of the breakthrough research are used to extract the feature words. Feature words can be used to understand the abstract and citation corpus features of the breakthrough research and contribute to the identification of breakthrough research. [Method/process] Key documents selected by Science as "Breakthrough of the Year" and "key publications" of Nobel Prize winners were selected as breakthrough research corpus data. Feature words were extracted by integrating abstracts and citation corpus of the paper. In the feature word extraction, the Stanford CoreNlp tool was used to perform word frequency statistics on the corpus, and the feature words were filtered in combination with expert opinions. Then we used the semantic relationship of medical texts to semantically expand feature words, which were used as the seed words. Finally, the retrieval and recognition effects of the abstract and citation feature words were further compared by the recall rate and the precision rate. [Result/conclusion] In the breakthrough research corpus, we selected 8 feature tokens of abstract corpora and 8 feature tokens of citation corpora. In the retrieval and recognition of feature words, the recall rate of the extended feature words of abstracts and citations is the highest, the precision of citation feature words is the highest. The comprehensive effect of the recall rate and precision of citation expansion feature words are better.
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2023-01-03 Cooperative journals: 《中国全科医学》
Abstract：
Objective To explore the effect of time-point matching intervention (DPM) program on disability, negative symptoms, insight, self-esteem level and family function in patients with schizophrenia disability. Methods The patients at P1 (70 cases), P2 (70 cases) and P3 (70 cases) were randomly divided into intervention group (35 cases) and control group (35 cases) by SPSS. The control group was given routine care, and the Intervention group was given the time point matching intervention. The duration of the intervention was 8 weeks, once a week. They were assessed using WHO-DAS II, PANSS-N, ITAQ, SES, and APGAR at baseline, after intervention, 3 months and 6 months after intervention. The health outcomes were compared by repeated measures analysis of variance. Results There was no significant difference in baseline data between the two groups at P1, P2 and P3 (P > 0.05).The results of repeated measures analysis of variance showed that after DPM intervention, there were time, group main effect and interaction effect in the degree of disability, negative symptoms, insight, and self-esteem of patients at P1.There were time main effects and interaction effects in family function, and the improvement of the above indicators in the intervention group was better than that in the control group at after intervention, 3 months and 6 months after intervention, and the difference was statistically significant (P < 0.05).There were time, group main effect and interaction effect in disability degree, insight, self-esteem, and family function of patients at P2. Except that there was no significant difference in the degree of disability and self-esteem at 3 months after intervention between the two groups (P > 0.05), other indicators were significantly different between the two groups after intervention, 3 months and 6 months after intervention (P < 0.05). There were time, group main effects and interaction effects on the degree of disability and insight of patients at P3. The improvement of the above indicators in the intervention group was better than that in the control group after intervention, 3 months after intervention and 6 months after intervention, and the difference had statistical significance (P < 0.05). Conclusion The DPM intervention program is effective in improving the disability degree, negative symptoms, insight, self-esteem and family function.
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. submitted time 2022-11-22 Cooperative journals: 《中国全科医学》
Abstract：
Atherosclerosis is a chronic inflammatory disease in which atheromatous plaque chronically accumulates and obstructs the intima of medium and large arteries, leading to severe stenosis and blood flow disorders, causing ischemia and hypoxia in tissues and organs. Nanomedicines have received widespread attention for their unique advantages over conventional drugs in the treatment of atherosclerosis. This article focuses on a review of several nanotargeted particles (systems) and exosome-targeted drug delivery systems in anti-atherosclerosis research, briefly describes the synthesis of representative nanomaterials, analyses their targeting properties and outlines the benefits and inherent challenges of nanomedicines. Despite the challenges that need to be addressed and refined, nanoparticles and exosome-targeted drug delivery therapies hold great promise and promise to be more widely used in clinical practice.
Subjects: Nursing >> Nursing submitted time 2022-10-21
Abstract： Objective To investigate the effect of predictive nursing strategies on preventing side effects of azacitidine in patients with high-risk myelodysplastic syndrome. Methods? Totally 40 patients undergoing subcutaneous injection therapy with azacitidine for high-risk myelodysplastic syndrome were randomly divided into the observation group and control group, with 20 cases in each group. Routing nursing management including posture nursing, oral care, psychological care and nursing of adverse reactions was carried out in the control group. In the observation group, a special nursing team was set up to enhance the predictive nursing interventions such as nutrition support, prevention of infection and hemorrhage, and so on. The side effects of azacitidine therapy were observed analyzed. Results The incidence of adverse reactions in the observation group was significantly lower than that in the control group (10.00% vs. 45.00%, P＜0.05). Conclusion? For those patients undergoing subcutaneous injection therapy with azacitidine for high-risk myelodysplastic syndrome, the predictive nursing is potentially effective to reduce the incidence of adverse drug reactions.
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2022-07-09 Cooperative journals: 《中国全科医学》
Abstract： Objective To explore the effect of online to offline(OTO) mode in type 2 elderly diabetes in the community. Methods Referred patients with type 2 elderly diabetes (110 cases) were selected from five Community in Shenyang city，and were divided into the control group (n=55) and the intervention group(n=55)by random number table. Patients in the control group received routine community management，while the intervention group carried out OTO health management. Changes in fasting blood glucose(FBG),2-hour postprandial glucose(2hPBG) and glycosylated hemoglobin(HbA1c) from baseline to the end of 6 and 12 months of management,and Summary of Diabetes Self Care Action （SDSCA）scores at baseline and the end of management were evaluated. Results Significant interaction effects produced by the intervention method and time,and significant main effects brought by both intervention method and time on FBG、2hPBG、HbA1c were observed(P﹤0.05).At the end of intervention,mean levels of FBG、2hPBG and HbA1c in the monitoring group were lower than those in the control group (P﹤0.05). And FBG、2hPBG and HbA1c in the monitoring group were lower than before the intervention (P﹤0.05).Each dimension and the total score of SDSCA in the intervention group were significantly higher than those of the control group (P﹤0.05). Conclusion 12-month OTO health management showed better effect on improving the levels of FBG、2hPBG and HbA1c in diabetic patients than control group.The improvement of each dimension and the total score of SDSCA was better than that in control group.OTO health management can effectively control blood glucose level and improve self-management behavior in type 2 elderly diabetes,so that diabetes mellitus can be long-term effectively management.
Subjects: Geosciences >> Geography submitted time 2019-11-15 Cooperative journals: 《干旱区地理》
Abstract：基于POI教育设施点数据，以街道为研究尺度，利用ArcGIS的标准差椭圆、核密度估计以及GeoDa的探索性空间数据分析（ESDA），对西安市主城区基础教育资源的空间分布特征进行分析。结果表明：在空间布局上，西安市基础教育资源表现出“外疏内密、东疏西密、北疏南密”的特征，在方向上，其空间布局呈现出“东北—西南”的特点；幼儿园及小学主要集中分布在中心城区，少部分集中在外围，中学主要集中在中心城区；H-H类型区主要集中在城南和城北，L-L类型区主要集中在中心城区的特殊区域。总体来看，基于街道尺度的西安市基础教育资源空间分布特征研究能够清晰地反映西安市基础教育资源的空间格局，可为政府相关部门合理规划教育设施的布局提供理论依据。
Subjects: Biology >> Zoology submitted time 2018-12-25 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在探究舍饲条件下饲喂不同非纤维性碳水化合物（NFC）/中性洗涤纤维（NDF）的全粗料与全混合饲粮对阿尔巴斯白绒山羊羔羊生长性能、屠宰性能及器官指数的影响。采用单因素完全随机试验设计，将40只4月龄断奶羯羔分为对照组（CG组）和试验组（EG组），每组4个重复，每个重复5只羊。CG组饲喂全粗料饲粮，育肥前期、中期与后期的NFC/NDF分别为0.13、0.12和0.12，EG组饲喂精粗比为50:50的全混合饲粮，NFC/NDF分别为0.78、0.77和0.77。试验结束时，分别从CG组和EG组中选择8只羔羊进行屠宰。预试期14 d，正试期90 d。结果表明：1）与CG组相比，EG组羔羊的终末体重、总增重显著增加（P<0.05），干物质采食量趋于显著地下降（P˃0.05），料重比显著降低（P<0.05）。2）与CG组相比，EG组羔羊的胴体重、屠宰率、眼肌面积、GR值均显著增加（P<0.05）；心脏、肝脏、肺脏、肾脏、头、毛皮、血的重量显著增加（P<0.05）。3）EG组羔羊皱胃重量占复胃总重比例显著低于CG组（P<0.05）；瘤胃重量、皱胃重量分别占宰前活重比例显著低于CG组（P<0.05）。EG组羔羊的大肠重量占宰前活重比例与小肠重量均显著低于CG组（P<0.05）。结果提示，与饲喂NFC/NDF为0.77~0.78的全混合饲粮相比，饲喂NFC/NDF为0.12~0.13的全粗料饲粮降低了阿尔巴斯白绒山羊羔羊的生长性能、屠宰性能和内脏器官的发育速度，但增加了胃肠道重占体重的比例。
Subjects: Biology >> Zoology submitted time 2018-12-25 Cooperative journals: 《动物营养学报》
Abstract：本试验主要探索绒山羊羔羊和成年羊前体脂肪细胞的培养及传代方法，为研究绒山羊的脂肪代谢机理提供细胞模型。以3月龄阿尔巴斯白绒山羊羔羊肾周脂肪组织为试验材料，采用胶原酶法直接得到羔羊前体脂肪细胞，结合其细胞形态观察、生长曲线和油红O染色进行鉴定；以绒山羊成年羊肾周脂肪组织为试验材料，采用胶原酶法和“天花板”法得到成熟脂肪细胞后，通过去分化得到前体脂肪细胞，诱导分化后利用油红O染色鉴定其向成熟脂肪细胞分化的情况。绒山羊羔羊肾周脂肪组织中前体脂肪细胞的适宜分离条件为0.1% Ⅰ型胶原酶、37 ℃消化1 h，250g离心10 min；传代时分离细胞采用0.25%胰蛋白酶消化60 s。细胞形态为梭形，生长曲线呈“S”型，油红O染色结果呈阳性。成年羊采用和羔羊相同的胶原酶法获得成熟脂肪细胞后，通过改进的“天花板”法获得前体脂肪细胞，经诱导分化后，油红O染色结果呈阳性。综上，采用I型胶原酶消化法可直接分离培养3月龄绒山羊羔羊的前体脂肪细胞；采用胶原酶法和改进后的“天花板”法分离培养成年绒山羊的前体脂肪细胞是可行的。
Subjects: Biology >> Zoology submitted time 2017-10-23 Cooperative journals: 《动物营养学报》
Abstract：维生素A是影响动物组织脂类代谢的关键因子。本文综述了维生素A对动物脂类代谢的影响，并从脂类代谢相关基因的表达及其信号通路、脂肪细胞的数量、脂肪细胞因子分泌和参与表观遗传学修饰的角度综述了其可能的影响机制，为深入探讨维生素A对动物脂类代谢的影响机制及通过维生素A调控动物的脂肪代谢提供了理论依据。
Subjects: Biology >> Zoology submitted time 2017-10-11 Cooperative journals: 《动物营养学报》
Abstract：本试验研究了放牧和舍饲育肥对阿尔巴斯白绒山羊成年羊和断奶羔羊血液和肌肉组织（背最长肌、臂三头肌、股二头肌和臀肌）中氨基酸组成的影响。采用2×2因子试验设计，选择体重、体型外貌接近、健康无病的4月龄阿尔巴斯白绒山羊断奶羔羊[（20.36±0.32） kg]60只和5岁成年羊[（40.38±0.84） kg]60只，分为4组，每组30只。因素1为育肥方式，放牧育肥和舍饲育肥(采食全混合日粮）2种，分别记为PF和SF；因素2为年龄，成年羊和羔羊2个阶段，分别记为AG与KG。成年羊和羔羊分别进行60和90 d的育肥。结果表明：PF组血浆非必需氨基酸(NEAA)和呈味氨基酸(DAA)浓度显著低于SF组（P<0.05），必需氨基酸(EAA)、功能性氨基酸(FAA)和限制性氨基酸(LAA)浓度显著高于SF组（P<0.05）。KG组血浆NEAA、FAA和DAA浓度显著高于AG组（P<0.05），而EAA、支链氨基酸（BCAA）和LAA浓度均显著低于AG组（P<0.05）。总体上，PF组肌肉粗蛋白质（CP）、EAA、NEAA、总氨基酸（TAA）、BCAA、FAA和DAA含量低于SF组。KG组肌肉CP、EAA、NEAA、TAA、BCAA、LAA、FAA和DAA含量高于AG组。由此可见，舍饲育肥绒山羊肌肉氨基酸组成优于放牧育肥，断奶羔羊肌肉的氨基酸组成优于成年羊。
Subjects: Biology >> Zoology submitted time 2017-10-10 Cooperative journals: 《动物营养学报》
Abstract：脂肪与肥胖相关（fat mass and obesity associated，FTO）基因是一种与普通肥胖相关的等位基因，该基因导致的肥胖是21世纪世界各国面临的最大公共卫生挑战之一。FTO基因与机体的普通肥胖有着密切的关系，而且与脂肪沉积和脂肪代谢相关激素及基因的表达有关。本文综述了FTO基因在脂肪细胞分化和脂肪代谢中的作用，揭示了FTO基因对脂肪沉积的影响，为深入研究动物脂肪代谢的机制提供理论基础。
Subjects: Biology >> Zoology submitted time 2017-10-10 Cooperative journals: 《动物营养学报》
Abstract：本试验研究了呼伦贝尔羊（HL）和呼伦贝尔羊与杜泊羊杂交1代（HZ）羔羊在自然放牧（NG）与放牧补饲（GS）2种不同育肥方式下，其血浆和肌肉组织（背最长肌、臂三头肌、股二头肌）中氨基酸（AA）组成的变化。采用2×2完全随机试验设计，选择体重、体况接近的健康4月龄断奶HL和HZ公羔各60只。因素1为育肥方式，分为NG与GS；因素2为品种，分为HL与HZ。共分为4组，每组30只。进行为期60 d的育肥。结果表明：1)NG组血浆中必需氨基酸(EAA)、限制性氨基酸(LAA)、功能性氨基酸（FAA）和总氨基酸(TAA)含量显著低于GS组（P<0.05），呈味氨基酸(DAA)含量有低于GS组趋势（0.05≤P<0.10）。2)与GS组相比，NG组背最长肌中粗蛋白质（CP）、LAA含量显著升高（P<0.05）。3)与GS组相比，NG组臂三头肌中LAA和DAA含量显著降低（P<0.05），EAA含量均有降低的趋势（0.05≤P<0.10）。4)NG组股二头肌中CP、EAA、NEAA、TAA、LAA、BCAA、DAA含量显著低于GS组（P<0.05）。5)与HL组相比，HZ组血浆EAA，背最长肌LAA，臂三头肌BCAA和股二头肌EAA含量显著或有显著趋势升高（P<0.10）。由此可见，放牧补饲组羔羊肉蛋白质营养价值优于自然放牧组，呼杜杂1代羔羊肉蛋白质营养价值优于呼伦贝尔羔羊。
Subjects: Biology >> Ecology submitted time 2017-03-08 Cooperative journals: 《生态学报》
Abstract：产业生态学由于缺少关于空间分析的工具，使得研究结果因缺乏空间维度信息而影响对管理效率和精准度的支持。基于GIS的产业生态学相关研究已成为产业生态学研究的一个新的方向。为总结已有的研究成果并展望未来的研究方向，运用文献计量及对比分析的手段，系统分析了国内外基于GIS的产业生态学的相关研究进展，得出以下结论：当前基于GIS的产业生态研究主要集中在物质代谢、产业共生和生命周期评价3个方面，将GIS技术引入到物质代谢研究中，可以更好的展示物质代谢的时空分布格局，为物质代谢研究提供了一种新的方法；基于GIS技术，不仅可以更加高效地挖掘潜在的产业共生机会，还可应用于生态产业园的规划管理如企业的选址、空间布局等以及废弃物的回收再利用方面；将GIS与LCA耦合在一起，可以很好地补充、完善和管理传统数据，有助于探索产品、活动或工艺的环境影响的空间特性以及进行土地利用相关的环境影响评价。另外，国内外研究的侧重点也不尽相同。在物质代谢研究中，国内研究较少，仅在城市尺度上进行了基础设施的物质代谢及其存量分析，国外在国家、城市尺度上研究了铜、锌等金属的物质代谢情况；在产业共生研究中，国内侧重于生态产业园的研究，而国外侧重于城市尺度的产业共生机会识别的研究；在LCA的研究中，国内开展了基于GIS的生命周期评价数据库和产品材料信息管理系统的研究，而国外侧重于进行区域化的生命周期评价、进行土地利用影响类型的相关评价以及污染物的追踪，国内在该方面尚处于起步阶段。国内外在研究方法上存在共性，都是基于GIS的空间分析方法、缓冲区分析方法以及数据库技术等。未来将GIS作为一个平台，面向产业转型展开产业生态学综合理论方法的研究，可以为产业的可持续性管理提供有效支持。
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