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Cultivation of Black Fungus under Forest in Middle-high Altitude Areas
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作者 袁长波 徐延熙 +5 位作者 王艳芹 姚利 付龙云 田叶 李瑞琴 曹德宾 《Agricultural Science & Technology》 CAS 2016年第10期2358-2361,共4页
[Objective] The study was to solve the contradiction between fungus and forest during the production of black fungi, and to obtain relatively high economic benefits and ecological benefits. [Method] Black fungi were c... [Objective] The study was to solve the contradiction between fungus and forest during the production of black fungi, and to obtain relatively high economic benefits and ecological benefits. [Method] Black fungi were cultivated in forest with middle-high altitude of 500-1 600 m. The germination time of fungus stick, germination days of buds, growth days of fruiting body, commodity exterior, marketing effect and biological efficiency of black fungi were investigated. [Result] Compared with traditional cultivation, black fungus products cultivated under forest had the taste and flavor of wild black fungus. Fungus chaff wastage was directly decomposed by the roots in forest land, improving the soil structure of forest land. The need of moisture retention and the frequent access of administrative staff reduced the probability of forest fire occurrence. [Conclusion] Cultivation of black fungus under forest saves more than 70% fixed-asset investment on fungus shed, and the biological efficiency reached 12.2%. 展开更多
关键词 Forest area in middle-high altitude Under forest Black Fungus
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Technologies of oxygen supply for life support during the development of mineral resources in high altitude areas 被引量:2
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作者 Liu Yingshu Jia Yanxiang +4 位作者 Wu Tianyi Deng Ling Yang Xiong Liu Wenhai Zhang Hui 《Engineering Sciences》 EI 2013年第2期68-75,共8页
In order to fulfill the needs of life-support oxygen supply during the development of plateau mineral resources,four oxygen supply patterns suitable for the plateau mine in specific environment were developed:tunnel f... In order to fulfill the needs of life-support oxygen supply during the development of plateau mineral resources,four oxygen supply patterns suitable for the plateau mine in specific environment were developed:tunnel face diffusive oxygen supply,tunnel oxygen-bar car,carried oxygen cylinder and portable oxygen generator. Through the study of safety oxygen supply experiments in low- pressure plateau areas,the mathematical relationship between maximum integration of secure oxygen volume and altitude has been achieved. Oxygen supply safety control should follow this relationship in plateau mines during the time of executing tunnel face or in room air diffusive oxygen supply. The application results of life-support oxygen supplement technologies in the development of mineral resources in high altitude areas show that the oxygen supply for tunneling miners in plateau mines can not only effectively enhance the oxygen saturation,reduce the pulse rate and the breath rate per minute,but also improve various symptoms caused by altitude hypoxia and high-intensity physical labor. 展开更多
关键词 high altitude areas mineral exploitation life support oxygen supply
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Establishing altitude datum in dynamic deformation areas
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作者 GAO Jing-xiang~1, ZHENG Nan-shan~1, YU Xue-xiang~2,LI Xiang-chen~3,GUO Gang-li~1 (1. China University of Mining and Technology, Xuzhou 221008,China 2. Anhui Polytechnic University, Huainan 232001, China 3. Technological Research Institute of Yanzhou Mining Group, Yanzhou 273500, China) 《中国有色金属学会会刊:英文版》 CSCD 2005年第S1期53-57,共5页
In the high groundwater table mine areas in Eastern China, such as Yanzhou Mining Group, since the rapid development of coal industry, and especially the mining technique of fully-mechanized top-coal caving mining hav... In the high groundwater table mine areas in Eastern China, such as Yanzhou Mining Group, since the rapid development of coal industry, and especially the mining technique of fully-mechanized top-coal caving mining have been used widely, the surface deformation and subsidence becomes more tempestuous and rapider. With the great surface deformation, the rapid deformation of the leveling control network created newly is also resulted. Therefore to establish a high precise altitude datum in dynamic deformation mine areas is one of the key problems to be settled urgently. The theory of altitude datum establishment with GPS technique in dynamic deformation areas due to mining is inquired. Finally a case is given. 展开更多
关键词 GPS DEFORMATION area DUE to MINING altitude DATUM DEFORMATION analysis
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Industrial Poverty Alleviation Model in Southwestern High-altitude Mountainous Areas of China——A Case Study of Industrial Poverty Alleviation of Xueshan Township in Luquan County of Yunnan Province through Planting Codonopsis pilosula 被引量:4
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作者 Zisheng YANG Renyi YANG +5 位作者 Yanbo HE Chonghui LU En ZHU Yaohan PI Mingxin WU Ying XIONG 《Asian Agricultural Research》 2019年第3期48-54,共7页
Due to the severe restrictions of natural conditions and ecological environment,high-altitude mountainous areas usually become the " hard bones" in the battle against poverty. Xueshan Township,Luquan Yi and ... Due to the severe restrictions of natural conditions and ecological environment,high-altitude mountainous areas usually become the " hard bones" in the battle against poverty. Xueshan Township,Luquan Yi and Miao Autonomous County of Yunnan Province,located in the alpine valley of Jinsha River,is a major township with wide and deep poverty,and the incidence of poverty is up to 45. 00%. In recent years,Xueshan Township has insisted on the battle against poverty,made effort to develop the Codonopsis pilosula industry,and successfully developed a road to poverty alleviation through C. pilosula industry,and formed a unique industrial poverty alleviation model by the end of 2018,the incidence of poverty dropped to 0. 74%. Based on field survey and interview,this paper analyzes and summarizes the specific practices,main results,practical experience and promotion and application measures of the poverty alleviation model of C. pilosula planting industry in Xueshan Township,in the hope of providing certain reference for the targeted poverty alleviation in similar areas in Yunnan Province and other provinces of China. 展开更多
关键词 HIGH-altitude mountainous areas INDUSTRIAL poverty alleviation Chinese herbal medicine PLANTING CODONOPSIS pilosula Model Xueshan Township of Luquan COUNTY
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Study on Selection of Dust Collectors for Large Capacity Thermal Power Units in High Altitude Areas
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作者 Wen Yiqian Cao Hongzhen Qi Jinsheng 《Meteorological and Environmental Research》 CAS 2017年第3期62-66,共5页
A dust collector is an important equipment in a thermal power plant,and reasonable selection of a dust collector is important for environmental protection in the power plant. Huaneng Xining Power Plant is located at a... A dust collector is an important equipment in a thermal power plant,and reasonable selection of a dust collector is important for environmental protection in the power plant. Huaneng Xining Power Plant is located at an elevation of 2 360 m. Based on the characteristics of the high altitude area and their special requirements for dust collectors,the selection of dust collectors for the thermal power unit in the high altitude area was studied,and then two types of dust collectors( a rotary electrode electrostatic precipitator and electric-bag composite precipitator) for the thermal power unit were compared from the aspects of technological and economical feasibility. Finally,a proposal to select a suitable dust collector for the thermal power plant was put forward. 展开更多
关键词 High altitude areas ROTARY electrode ELECTROSTATIC PRECIPITATOR Electric-bag composite PRECIPITATOR SELECTION of DUST collectors
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Occurrence Regularity of Tobacco Cutworm Moth (Spodoptera Litura) in Low-Altitude Tobacco Cultivation Areas in Lincang
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作者 Mingwen YANG Xuebing ZHANG +4 位作者 Ping YA Guiqing PENG Ping CHEN Jianjun YU Dongcheng ZHANG 《Plant Diseases and Pests》 CAS 2012年第2期42-45,48,共5页
[ Objective ] The paper was to study the occurrence and damage regularity of tobacco cutworm moth (Spodoptera Litura Fabricius) in low-altitude area in Lincang city. [ Method] The adult sex attractant monitoring, fi... [ Objective ] The paper was to study the occurrence and damage regularity of tobacco cutworm moth (Spodoptera Litura Fabricius) in low-altitude area in Lincang city. [ Method] The adult sex attractant monitoring, field investigation of occurrence and damage, and observation of continuous generation development of natural populations were carried out in natural flue-cured tobacco fields. [ Result] In field growth period of flue-cured tobacco under low-altitude of 1 000 - 1300 m, tobacco cutworm moth occurred for 4 generations, the duration of each generation was about 33 d, and the main injurious generation was the third generation. [ Conclusion] The paper provided reference for comprehensive control of tobacco cutworm moth in the low altitude areas. 展开更多
关键词 Low-altitude tobacco cultivation areas Tobacco cutworm moth Occurrence regularity China
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Characteristics of Leaf Epidermis of 22 Lilieae (Liliaceae) under Different Altitudes in China
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作者 Genshen Yin Shuangshuang Zhang +2 位作者 Wenlei Cheng Minghua Dong Ye Chen 《American Journal of Plant Sciences》 CAS 2023年第1期29-40,共12页
In this study, 22 leaf samples of 22 Lilieae species were collected in six Province at 90 - 3740 m to study the variations of leaf characteristics with altitude change. The Qualitative character of leaf epidermis and ... In this study, 22 leaf samples of 22 Lilieae species were collected in six Province at 90 - 3740 m to study the variations of leaf characteristics with altitude change. The Qualitative character of leaf epidermis and two stomatal indexes, viz. stomatal area (SA), stomatal index (SI), were analyzed in laboratory. The results show that: 1) the shape of the leaf epidermis cells and the pattern of the anticlinal walls provide some useful taxonomic information to distinguish the genus, however, none of the stable traits are exclusive to a genus;2) there are significant or even very significant linear correlations between the two indexes and altitude, of which SA exhibit a negative correlation with altitude (r<sup>2</sup> = 0.294, p = 0.009), while SI exhibit a positive correlation with altitude (r<sup>2</sup> = -0.254, p = 0.017). As a result, the pattern of leaf cells and anticlinal walls is influenced by genetic factors, while the stomatal area and stomatal index are influenced by environmental factors. Members of the tribe Lilieae have a relatively stable elevation range, which is related to their long-term adaptation to the local environment in the structure of their leaf epidermis. 展开更多
关键词 Lilieae Leaf Epidermis Stomatal area Stomatal Index altitudeS
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Effect of combined spinal and epidural anesthesia on the level of pain media, stress indicators and inflammatory factors in patients undergoing high altitude cesarean section
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作者 Tian Shun Huang Cui-yuan +1 位作者 Pu Le-hua Tian Yu 《Journal of Hainan Medical University》 2019年第17期71-75,共5页
Objective: To discuss the effect of combined spinal and epidural anesthesia on the levels of pain media, stress indicators and inflammatory factors in patients undergoing high altitude cesarean section. Methods: Eight... Objective: To discuss the effect of combined spinal and epidural anesthesia on the levels of pain media, stress indicators and inflammatory factors in patients undergoing high altitude cesarean section. Methods: Eighty patients who underwent cesarean section in our hospital from January 2017 to April 2019 were enrolled in the hospital. They were divided into two groups according to the patient's anesthesia. Fourty patients receiving epidural anesthesia were included in the control group, and another 40 patients received lumbar stiffness. The combined anesthesia patient was included in the observation group. Changes in pain mediators [Serum neuropeptide Y (NPY), endorphin (β-EP), substance P (SP)], stress indicators [Serum cortisol (Cor), C-peptide (C-P), advanced oxidative protein product (AOPP)], inflammatory factor levels [Hypersensitive C-reactive protein (hs-CRP), tumor necrosis factor-alpha (TNF-α)], and immunoglobulin levels [Serum IgA, IgG, IgM] were compared between the two groups. Results: Before anesthesia, there were no significant difference in pain media, stress index, inflammatory factor level and immunoglobulin level between the two groups (P>0.05). At 12 h after operation, the two groups of patients were NPY, β-EP, SP, Cor. The levels of C-P, AOPP, hs-CRP and TNF-α were higher than those before operation (P<0.05). The levels of IgA, IgG and IgM were lower than those before operation (P<0.05). Among them, observation group NPY, β-EP, SP, Cor, C-P, AOPP, hs-CRP and TNF-α were significantly lower than those of the control group (P<0.05). The serum levels of IgA, IgG and IgM were significantly higher than those of the control group (P<0.05). Conclusion: Combined spinal and epidural anesthesia can more effectively alleviate maternal pain in high altitude cesarean section, more effectively reduce the inflammatory stress response of patients, promote the humoral immune function of patients, and is beneficial to the early recovery of maternal postoperative, and has high clinical value. 展开更多
关键词 COMBINED SPINAL and EPIDURAL anesthesia High altitude area CESareaN section surgery PAIN Stress Inflammation
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Effective administration of cranial drilling therapy in the treatment of fourth degree temporal,facial and upper limb burns at high altitude:A case report 被引量:2
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作者 Cong-Mo Shen Yi Li +1 位作者 Zhou Liu Yong-Zhang Qi 《World Journal of Clinical Cases》 SCIE 2020年第20期5062-5069,共8页
BACKGROUND Fourth degree burns damage the full thickness of the skin and affect underlying tissues.Skin grafting after debridement is often used to cover the wounds of salvageable severe burns.A granulation wound can ... BACKGROUND Fourth degree burns damage the full thickness of the skin and affect underlying tissues.Skin grafting after debridement is often used to cover the wounds of salvageable severe burns.A granulation wound can be formed by drilling the skull to the barrier layer to solve the problem of skull exposure.Low oxygen levels present at high altitudes aggravate ischemia and hypoxia which can negatively impact wound healing.The impaired healing in such cases can be ameliorated by hyperbaric oxygen therapy.CASE SUMMARY We describe a patient who presented with fourth degree burns to the left temporal and facial regions upon admission in December 2018.The periosteum of the skull and the deep fascia of the face were exposed.After the first stage of debridement and skin grafting,the temporal skin did not survive well.Granulation was induced by cranial drilling,and then a local flap was transferred to cover the wound.The left temporal and facial wounds were completely covered and the patient recovered well.CONCLUSION Skin grafting and flap transfer after early debridement to cover the wound and control infection were of great significance.In the later stages of the patient's treatment,survival of the skin graft and skin flap was observed.The second stage repair was performed to achieve successful skin grafting by cranial granulation.Granulation was formed by drilling the skull,and then the wound was closed,which is suitable for cases with skull exposure and wounds with poor blood supply.We consider that hyperbaric oxygen treatment and improving tissue oxygen supply were beneficial in this patient. 展开更多
关键词 Fourth degree burn Skull exposure Chronic wounds Cranial drilling therapy High altitude area Case report
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Plasma endothelin-1 and nitric oxide correlate with ligustrazine alleviation of pulmonary artery hypertension in patients of chronic cor pulmonale from high altitude plateau during acute exacerbation 被引量:11
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作者 En-zhi FENG Sheng-yue YANG +3 位作者 Ning-xia HUANG He YIN Ying ZHANG Zhong-xin TIAN 《中国应用生理学杂志》 CAS CSCD 2014年第6期532-537,共6页
Objective To explore the mechanisms involved in the ligustrazine alleviation of the pulmonary artery hypertension(PAH) in patients of chronic obstructive pulmonary disease(COPD) associated with chronic cor pulmonale(C... Objective To explore the mechanisms involved in the ligustrazine alleviation of the pulmonary artery hypertension(PAH) in patients of chronic obstructive pulmonary disease(COPD) associated with chronic cor pulmonale(CCP) during exacerbation.Methods Seventy patients of COPD and CCP with acute exacerbation were randomly and equally divided into control group and treatment group.The control group received standard treatment with antibiotics,antiasthmatic and expectorant medications,and oxygenation;and the ligustrazine treatment group received ligustrazine treatment(80 mg/d;i.v.;for 2 weeks) in addition to the standard treatment.Before and at the end of 2 week treatment,the clinic responses of the two regimens were evaluated,plasma levels of endothelin-1(ET-1) and nitric oxide(NO) were determined;arterial oxygen partial pressure(PaO_2),mean pulmonary arterial pressure(mPAP),outflow tract of right ventricle(RVOT),and internal diameter of right ventricle(RV) were measured.Results Good clinic benefits were achieved in both the standard and ligustrazine regimens,plasma level of ET-1,values of mPAP,RV and RVOT decreased significantly,plasma level of NO and PaO_2 values decreased(all P<0.01 vs pretreatment to all parameters).Compared with the control group,ligustrazine greatly enhanced the clinic efficacy from 77.1%to 97.1%(P<0.05),and also resulted in more significant changes of all these parameters(P<0.01 vs control group for all parameters).For both groups,the levels of plasma ET-1 were positively correlated with values of mPAP,RVOT,and RV(r = 0.710,0.853,and 0.766,respectively,all P = 0.000),and negatively correlated with plasma NO and PaO_2(r =- 0.823,and- 0.752,respectively,all P = 0.000).Conclusion Ligustrazine is effective in treating pulmonary artery hypertension during acute exacerbation of COPD and CCP in patients from the plateau area.The observed changes in the plasma levels of NO and ET-1 in response to ligustrazine treatment suggest that ligustrazine may act through the selective effect on pulmonary blood vessels to enhance the synthesis and release of NO and suppress those of ET-1 from lung vascular endothelial cells,thus reducing pulmonary artery pressure and decreasing pulmonary arterial hypertension. 展开更多
关键词 肺动脉高压 内皮素-1 川芎嗪 一氧化氮 高原地区 肺心病 急性 患者
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Research progress of age-related macular degeneration related gene polymorphism at high altitude
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作者 Xin Yan Ling Li Rui-Juan Guan 《Journal of Hainan Medical University》 2020年第11期67-70,共4页
Age-related macular degeneration(AMD)is a kind of progressive eye disease that seriously damages vision,and it is one of the important causes of blindness.In recent years,a large number of studies have found that ther... Age-related macular degeneration(AMD)is a kind of progressive eye disease that seriously damages vision,and it is one of the important causes of blindness.In recent years,a large number of studies have found that there is a significant correlation between genetic factors and the occurrence and development of AMD.The study of gene polymorphism provides new ideas and directions for clinical diagnosis and treatment.In this paper,we will make a brief review of the research progress related to complement factor H(CFH),serine protease(HtrA1),age-related macular degeneration susceptibility factor 2(ARMS2)and vascular endothelial growth factor(VEGF)gene single nucleotide polymorphisms(SNP). 展开更多
关键词 Age related macular degeneration Gene polymorphism High altitude area Research progress
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Systemic treatment for severe concentrated sulfuric acid burns in an adult male at high altitude:A case report
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作者 Ruo-Mei Zhao Yi Li +1 位作者 Sheng-Wu Chao Hong-Jin Wang 《World Journal of Clinical Cases》 SCIE 2020年第7期1337-1342,共6页
BACKGROUND The aim of this study was to report a case of a patient who suffered from severe concentrated sulfuric acid burns while working at high altitude.This patient recovered after systemic treatment.We also provi... BACKGROUND The aim of this study was to report a case of a patient who suffered from severe concentrated sulfuric acid burns while working at high altitude.This patient recovered after systemic treatment.We also provide a literature review for a better understanding of the disease.CASE SUMMARY A 30-year-old male,who was working in a local chemical plant in Xining at an altitude of 2261 m,suffered from 85%burns(Ⅲ°70%,deep Ⅱ°15%)after a tank containing 80%concentration of sulfuric acid exploded.The patient immediately received a series of first aid treatments,as well as rigorous wound managements after admission,which included protection for the whole body and organs,prevention and treatment of eye burns,and the appropriate oxygen therapy.After 65 d of treatment,the burn wounds had completely healed,and the patient was transferred to another specialized hospital for further eye treatment.The first aid before admission and the emergency treatment of wounds following admission were appropriate.No severe complications of sepsis,severe renal insufficiency,septic costal chondritis,corneal perforation or other burns occurred during the treatment.CONCLUSION The main causes of concentrated sulfuric acid burns consisted of accidental burns at work,accidents in the outside,factitious injuries and improper laboratory operations.The clinical manifestations were mostly deep Ⅱ°and Ⅲ°burns,with a formation of brown-black,leather-like eschar on the wound surface and locally embolized dendrite-like vessels.The clear cause of the injury and typical clinical manifestations in this case made it easy to diagnosis.However,adult cases with severe concentrated sulfuric acid burns in high altitude areas are rare,so the successful treatment of this case is of great significance. 展开更多
关键词 High altitude area Concentrated sulfuric ACID BURNS EXTENSIVE BURN Case report
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高原地区卒中后癫痫的临床及预后特征 被引量:1
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作者 次央 胡亚雄 +4 位作者 王其琪 连雨晴 陈玉秀 周立新 赵玉华 《中国卒中杂志》 北大核心 2024年第4期423-430,共8页
目的探讨高原地区居民卒中后癫痫(post-stroke epilepsy,PSE)的临床、治疗和预后特征,并分析影响PSE预后的风险因素,为制定高原地区PSE临床诊疗策略提供一定依据。方法回顾性连续纳入2019年1月—2023年6月在西藏自治区人民医院住院治疗... 目的探讨高原地区居民卒中后癫痫(post-stroke epilepsy,PSE)的临床、治疗和预后特征,并分析影响PSE预后的风险因素,为制定高原地区PSE临床诊疗策略提供一定依据。方法回顾性连续纳入2019年1月—2023年6月在西藏自治区人民医院住院治疗的高原地区PSE患者。根据PSE类型分为早发性(卒中后≤7 d)PSE组和迟发性(卒中后>7 d)PSE组,于2023年9月通过电话和门诊相结合的方式进行随访,获取患者的功能预后(mRS评分)情况。比较两组患者的性别、年龄、卒中类型分布、卒中严重程度(发病时mRS评分)、实验室检查等基线资料,以及随访功能预后的差异,分析预后不良(随访mRS评分≥3分)的影响因素。结果共纳入符合入组标准的PSE患者89例,占同期住院高原卒中患者的4.2%,患者发病年龄中位数为55(44~69)岁,男性59例(66.3%),藏族87例(97.8%),发病时mRS评分为3(1~4)分。入组患者中早发性PSE组49例(55.1%),迟发性PSE组40例(44.9%)。卒中亚型分布中脑出血所占比例最高,为39.3%(35例)。最常见的癫痫发作类型为全面起源性发作,共69例(77.5%)。36例(40.4%)PSE患者合并癫痫持续状态。影像学检查显示卒中病灶中最常见的为皮质病灶,共48例(53.9%)。治疗方面85例(95.5%)PSE患者接受了抗癫痫药物治疗,其中79例(88.8%)患者接受单药治疗,最常应用的抗癫痫药物是奥卡西平/卡马西平(36例,40.4%)。PSE患者的院内死亡率为10.1%(9例)。随访时间中位数为27(15~40)个月,预后不良患者占56.7%(38/67),死亡率为35.8%(24/67)。与早发性PSE组相比,迟发性PSE组男性比例更高(78.6%vs.56.6%,P=0.043)且有癫痫家族史比例更高(10.0%vs.0,P=0.037)。两组间的卒中类型分布(P=0.040)和应用抗癫痫药物类型分布(P=0.047)差异有统计学意义。多因素回归分析显示,卒中症状严重(发病时mRS评分高)是PSE预后不良的独立危险因素(OR 1.691,95%CI 1.245~2.297,P<0.001)。结论PSE在高原地区住院卒中患者中的发生率为4.2%。高原地区PSE患者发病时临床症状重,40.4%的患者合并癫痫持续状态。高原地区PSE患者预后不良,致残率和死亡率高。 展开更多
关键词 卒中后癫痫 早发性癫痫 迟发性癫痫 预后 高原地区
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生草对贵州高海拔区苹果园土壤呼吸及水热环境的影响
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作者 冯建文 韩秀梅 +3 位作者 蒙小玉 杨华 李顺雨 吴亚维 《贵州农业科学》 CAS 2024年第4期81-89,共9页
【目的】探明西南冷凉高地苹果产区果园不同草种覆盖条件土壤呼吸特征及其与土壤水热的关系,为筛选苹果园适宜生草类型提供参考依据。【方法】设置鼠茅草(Vulpia myuros)、鸭茅(Dactylis glomerata)、黑麦草(Lolium perenne)、白三叶(Tr... 【目的】探明西南冷凉高地苹果产区果园不同草种覆盖条件土壤呼吸特征及其与土壤水热的关系,为筛选苹果园适宜生草类型提供参考依据。【方法】设置鼠茅草(Vulpia myuros)、鸭茅(Dactylis glomerata)、黑麦草(Lolium perenne)、白三叶(Trifolium repens)、光叶紫花苕(Vicia villosa)、鼠茅草+鸭茅+白三叶混播、黑麦草+白三叶+鸭茅混播、鼠茅草+黑麦草+白三叶混播8个苹果园生草处理,以清耕作对照(CK),利用LI-6400XT便携式光合测定系统配套使用土壤呼吸气室(6400-09)测定果园土壤呼吸速率,采用非线性回归和指数模型,分析不同生草处理对土壤呼吸与土壤水热环境的影响。【结果】生草显著提高果园土壤呼吸速率,较清耕提高0.07%~256.39%,其中,黑麦草+白三叶+鸭茅混播处理提高幅度最高。生草覆盖显著提高土壤水分保持能力,对0~20 cm土层的影响最明显,相同月份不同生草处理间土壤水分差异明显,生草混播处理提高土壤水分能力优于生草单播处理。生草覆盖后显著降低夏季(5—7月)表层土壤(0~5 cm)温度。不同生草覆盖处理土壤水分含量与土壤呼吸以二次函数拟合效果最佳,决定系数R 2在0.242~0.989,拟合度较高。各生草处理土壤温度与土壤呼吸速率呈指数函数关系,0~5 cm和5~10 cm土层拟合模型决定系数R 2平均值高于10~15 cm和15~20 cm土层。土壤温度、水分及二者的交互作用对土壤呼吸的协同影响高于土壤单因子的影响。【结论】苹果园生草处理可显著提高土壤呼吸速率,显著增加0~20 cm土层土壤的水分保持能力,降低果园夏季表层土壤(0~5 cm)温度,有效改善苹果根系生长环境,有利于树体发育。不同生草模式中以黑麦草+白三叶+鸭茅混播处理效果最优。 展开更多
关键词 苹果园 生草 土壤呼吸 水热环境 高海拔区 贵州
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高海拔多山地区架空输电线路高密点云数据获取方法研究及应用
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作者 杨刚 吕宝雄 +4 位作者 杨振胤 宁春晖 王明 雷尧 田毅 《测绘通报》 CSCD 北大核心 2024年第10期157-162,共6页
为解决高海拔多山地区有人直升机、复合翼无人机作业相对航高较高、易受侧风影响、点云稀疏的痛点,本文提出了一种“仿塔飞行”架空输电线路三维激光扫描点云数据获取方法,优化了传统的“仿地飞行”方式,对西藏藏中联网某500 kV超高压... 为解决高海拔多山地区有人直升机、复合翼无人机作业相对航高较高、易受侧风影响、点云稀疏的痛点,本文提出了一种“仿塔飞行”架空输电线路三维激光扫描点云数据获取方法,优化了传统的“仿地飞行”方式,对西藏藏中联网某500 kV超高压架空输电线路进行了点云数据获取,经数据处理及分析,点云数据体素密度大,空间位置精度高。试验结果表明,大载重多旋翼无人机在高海拔多山地区进行“仿塔飞行”作业,在降低作业风险的同时,所获取的点云数据密度高、噪声小,且金具和导线微部特征明显;同时,该方法具有机动性高、稳定性强、作业风险低的优势,为架空输电线路精细化自主巡检及国家电网智慧化应用提供了支撑。 展开更多
关键词 高海拔多山 点云体素密度 激光雷达 仿塔飞行 双航线
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海拔环境对甘蓝型油菜籽粒品质性状的影响
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作者 赵彩霞 王晋雄 《中国农学通报》 2024年第32期23-29,共7页
本文通过研究不同海拔环境下甘蓝型油菜籽粒品质性状变化规律,旨在为高海拔地区甘蓝型油菜引种及品质育种提供参考。以11个甘蓝型油菜品系为试材,在甘肃兰州、青海西宁和西藏拉萨试验点种植,比较分析3个海拔环境对油菜籽粒芥酸、硫苷、... 本文通过研究不同海拔环境下甘蓝型油菜籽粒品质性状变化规律,旨在为高海拔地区甘蓝型油菜引种及品质育种提供参考。以11个甘蓝型油菜品系为试材,在甘肃兰州、青海西宁和西藏拉萨试验点种植,比较分析3个海拔环境对油菜籽粒芥酸、硫苷、含油量、棕榈酸、C18脂肪酸的硬脂酸、油酸、亚油酸、亚麻酸品质的影响。结果表明,随海拔高度的增加,甘蓝型籽粒含油量呈增加趋势,品系间表现一致,变异系数为0.0822;芥酸含量均在高海拔拉萨种植后明显升高,硫苷含量在高海拔种植比低海拔种植均有不同程度的增加,其两者的变异系数较大,分别为0.3364、0.4920。相关性分析显示,芥酸含量、含油量与海拔呈极显著正相关,相关系数分别为0.865、0.750,硫苷与海拔呈显著相关性,相关系数为0.428。研究发现,高海拔有利于含油量、芥酸和硫苷的积累,纬度的升高有利于棕榈酸和硬脂酸的积累,温度的变化是多数品质含量变化的主要因素。 展开更多
关键词 海拔 甘蓝型油菜 品质 含油量 芥酸 硫苷 高海拔地区
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深度学习的大高差高海拔地区高程拟合方法
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作者 马下平 王风凯 +1 位作者 赵庆志 高余婷 《测绘通报》 CSCD 北大核心 2024年第8期102-108,共7页
大高差高海拔地区的地形复杂多变,传统的高程拟合方法,如多项式拟合、曲面拟合、BP神经网络和遗传算法改进的神经网络等方法,拟合精度都有待提高。本文构建了一种基于深度学习的高程拟合方法,利用西部某铁路控制网的2020年一期二等水准... 大高差高海拔地区的地形复杂多变,传统的高程拟合方法,如多项式拟合、曲面拟合、BP神经网络和遗传算法改进的神经网络等方法,拟合精度都有待提高。本文构建了一种基于深度学习的高程拟合方法,利用西部某铁路控制网的2020年一期二等水准测量数据,采用多层感知器(MLP)作为核心模型,通过结合RAdam优化器和GELU激活函数进行优化,该方法能够有效捕捉该地区的地形特征和高程变化规律,实现高精度的高程拟合。研究分析了不同优化器和激活函数组合对模型性能的影响,结果表明,深度学习模型在大高差高海拔地区高程拟合中表现出较佳性能,其均方误差(MSE)最低,平均绝对误差(MAE)最小,决定系数R 2最接近1,显著优于BP神经网络和遗传算法改进的神经网络方法。特别是RAdam优化器和GELU激活函数的组合,在模型性能上表现最佳。本文所构建出的深度学习大高差高程拟合方法,不仅精度较高且具有良好的泛化能力,能够适应大高差高海拔地区复杂多变的地形特征。 展开更多
关键词 深度学习 高程拟合 大高差高海拔地区 优化器 激活函数
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高海拔潮气量双环PID控制系统研究
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作者 王慧泉 魏志鹏 +1 位作者 马欣 邢海英 《电子测量技术》 北大核心 2024年第6期14-19,共6页
为解决高海拔地区气压降低导致急救呼吸机潮气量控制精度下降的问题,提出了双环PID潮气量控制系统。该系统采用气压补偿型PID控制器调整风机转速,并辅以积分分离式PID控制器,以实现对气流速度的精确控制。在实际海拔4370 m、大气压59 kP... 为解决高海拔地区气压降低导致急救呼吸机潮气量控制精度下降的问题,提出了双环PID潮气量控制系统。该系统采用气压补偿型PID控制器调整风机转速,并辅以积分分离式PID控制器,以实现对气流速度的精确控制。在实际海拔4370 m、大气压59 kPa的环境中,系统性能测试表明,相较于单环PID控制,双环控制系统在高海拔条件下表现出快速响应和无超调的卓越性能。平均气流速度输出误差为3.19%,最大误差为4.1%,优于现有临床设备的准确性。这一技术突破不仅提供了高海拔急救呼吸机潮气量控制的有效解决方案,也为特殊环境下的通气控制技术发展贡献了重要参考。 展开更多
关键词 高海拔地区 低气压 急救呼吸机 潮气量控制 气压补偿 双环PID
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急性缺氧暴露对人体生理反应及认知能力的影响研究
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作者 王杰 孙亮亮 +1 位作者 胡玥 苏小文 《制冷与空调(四川)》 2024年第1期32-39,共8页
在低压环境舱开展高海拔环境中人体急性缺氧暴露实验,研究环境压力和温度对人体生理参数和认知能力的影响规律。实验结果表明,随大气压力的降低,人体平均皮肤温度、口腔温度、舒张压、心率和心率变异性均呈增加,而血氧饱和度和收缩压呈... 在低压环境舱开展高海拔环境中人体急性缺氧暴露实验,研究环境压力和温度对人体生理参数和认知能力的影响规律。实验结果表明,随大气压力的降低,人体平均皮肤温度、口腔温度、舒张压、心率和心率变异性均呈增加,而血氧饱和度和收缩压呈降低趋势。其中,平均皮肤温度、心率和血氧饱和度具有显著性差异(p<0.05)。随温度的增加,只有血氧饱和度降低,其他生理参数均升高。其中,平均皮肤温度、心率具有显著性差异(p<0.05)。感知能力、记忆能力和反应能力随大气压力的降低而降低,思辨能力反而提高。其中,记忆能力受压力影响具有显著性(p<0.05)。感知能力和记忆能力随温度的增加有所提高,思辨能力在不同压力下随温度的变化规律不同,反应能力随温度的降低而提高。其中反应能力受温度影响具有显著性(p<0.05)。该研究为保障平原地区人员急进高海拔地区生命健康安全提供有力支撑。 展开更多
关键词 高海拔地区 急性缺氧暴露 生理反应 认知能力
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岐黄针疗法治疗高海拔地区盘源性腰痛临床观察
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作者 王娜 吕大治 《辽宁中医药大学学报》 CAS 2024年第8期213-216,共4页
目的探讨岐黄针疗法对患者临床疗效、腰椎功能及疼痛程度的影响。方法回顾性选取该院收治的200例高海拔地区盘源性腰痛患者,按照治疗方法分为对照组(n=100)和观察组(n=100)。对照组患者予以口服七叶皂苷钠片、塞来昔布胶囊治疗,观察组... 目的探讨岐黄针疗法对患者临床疗效、腰椎功能及疼痛程度的影响。方法回顾性选取该院收治的200例高海拔地区盘源性腰痛患者,按照治疗方法分为对照组(n=100)和观察组(n=100)。对照组患者予以口服七叶皂苷钠片、塞来昔布胶囊治疗,观察组在对照组用药基础上联合岐黄针疗法治疗。比较两组患者疗效、腰椎功能、疼痛程度、炎性因子水平、中医证候积分以及不良反应发生情况。结果两组疗效相比,观察组明显优于对照组(P<0.05);治疗后,两组患者腰椎功能均明显提高,疼痛显著缓解,两组相比,观察组优于对照组(P<0.05);治疗后,两组患者中医证候积分均明显降低,两组相比,观察组低于对照组(P<0.05);治疗后,两组患者炎性因子水平均降低,两组相比,观察组低于对照组(P<0.05);两组不良反应发生率相比差异无统计学意义(P>0.05)。结论岐黄针疗法治疗高海拔地区盘源性腰痛可提高患者疗效,缓解患者临床症状,改善腰椎功能及疼痛程度,并降低炎症反应。 展开更多
关键词 盘源性腰痛 高海拔地区 岐黄针疗法 腰椎功能
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