目的研究微创颅内血肿抽吸术对高血压脑出血患者B型脑钠肽(BNP)、C反应蛋白(CRP)、同型半胱氨酸(Hcy)及生活质量的影响。方法选取2014年12月至2016年10月湖南中医院大学附属宁乡医院高血压脑出血患者80例,按处理方式分为常规清除组(n=38...目的研究微创颅内血肿抽吸术对高血压脑出血患者B型脑钠肽(BNP)、C反应蛋白(CRP)、同型半胱氨酸(Hcy)及生活质量的影响。方法选取2014年12月至2016年10月湖南中医院大学附属宁乡医院高血压脑出血患者80例,按处理方式分为常规清除组(n=38)和微创抽吸组(n=42),前者给予开颅骨窗血肿清除术治疗,后者给予微创颅内血肿抽吸术治疗,并随访6个月;观察两组美国国立卫生院神经功能缺损评分(national institute of health stroke scale,NIHSS)得分情况;BNP、CRP、Hcy水平(ELISA法);术中出血量、平均手术时间、住院时间、血肿清除率、并发症、死亡情况及治疗前、治疗后1、3、6个月的生活质量(ADL)。结果与常规清除组比较,微创抽吸组治疗前NIHSS得分和BNP、CRP、Hcy水平差异无统计学意义(P>0.05),治疗后,微创抽吸组治疗有效率高于常规清除组(90.48%vs.71.05%),NIHSS得分低于常规清除组,术中出血量、平均手术时间、住院时间和并发症均减少,血肿清除率增加,BNP、CRP、Hcy水平均降低,治疗后1、3、6个月ADL得分均增高,差异有统计学意义(P<0.05);两组病死率差异无统计学意义(P>0.05)。结论微创颅内血肿抽吸术治疗较开颅骨窗血肿清除术,对高血压脑出血患者的神经功能和血肿清除更具改善作用,降低血浆BNP、CRP、Hcy水平,减少并发症,改善其生活质量。展开更多
POLAR-2 is a gamma-ray burst(GRB)polarimeter that is designed to study the polarization in GRB radiation emissions,aiming to improve our knowledge of related mechanisms.POLAR-2 is expected to utilize an on-board polar...POLAR-2 is a gamma-ray burst(GRB)polarimeter that is designed to study the polarization in GRB radiation emissions,aiming to improve our knowledge of related mechanisms.POLAR-2 is expected to utilize an on-board polarimeter that is sensitive to soft X-rays(2-10 keV),called low-energy polarization detector.We have developed a new soft X-ray polari-zation detector prototype based on gas microchannel plates(GMCPs)and pixel chips(Topmetal).The GMCPs have bulk resistance,which prevents charging-up effects and ensures gain stability during operation.The detector is composed of low outgassing materials and is gas-sealed using a laser welding technique,ensuring long-term stability.A modulation factor of 41.28%±0.64% is obtained for a 4.5 keV polarized X-ray beam.A residual modulation of 1.96%±0.58% at 5.9 keV is observed for the entire sensitive area.展开更多
The working stability of thinner-thick gaseous electron multipliers （THGEMs）, which have been developed by the University of the Chinese Academy of Sciences and the Second Academy of China＇s Aerospace Science and I...The working stability of thinner-thick gaseous electron multipliers （THGEMs）, which have been developed by the University of the Chinese Academy of Sciences and the Second Academy of China＇s Aerospace Science and Industry Corporation, is studied with an 8 keV x-ray on a Cu target. Gains of about 103–104 are achieved with a single board in Ar：iC4H10 （97：3）. Environmental factors, such as pressure, temperature and humidity are considered. The thinner-THGEMs are shown to perform stably over two months of studies.展开更多
A weighted graph is a graph in which every edge is assigned a non-negative real number. In a weighted graph, the weight of a path is the sum of the weights of its edges, and the weighed degree of a vertex is the sum o...A weighted graph is a graph in which every edge is assigned a non-negative real number. In a weighted graph, the weight of a path is the sum of the weights of its edges, and the weighed degree of a vertex is the sum of the weights of the edges incident with it. In this paper we give three weighted degree conditions for the existence of heavy or Hamilton paths with one or two given end-vertices in 2-connected weighted graphs.展开更多
A graph is called traceable if it contains a Hamilton path, i.e., a path passing through all the vertices. Let G be a graph on n vertices. G is called claw-o-1-heavy if every induced claw(K_(1,3)) of G has a pair of n...A graph is called traceable if it contains a Hamilton path, i.e., a path passing through all the vertices. Let G be a graph on n vertices. G is called claw-o-1-heavy if every induced claw(K_(1,3)) of G has a pair of nonadjacent vertices with degree sum at least n-1 in G. In this paper we show that a claw-o-1-heavy graph G is traceable if we impose certain additional conditions on G involving forbidden induced subgraphs.展开更多
从贵州省正安县、桐梓县和重庆市南川区的金佛山方竹林地采集方竹根系和根际土壤,采用碱解离-酸性品红染色法对根样进行染色,研究根系丛枝菌根侵染情况,利用湿筛倾注-蔗糖离心法从土样中分离AM真菌孢子,结合形态特征和18S r DNA AML1-A...从贵州省正安县、桐梓县和重庆市南川区的金佛山方竹林地采集方竹根系和根际土壤,采用碱解离-酸性品红染色法对根样进行染色,研究根系丛枝菌根侵染情况,利用湿筛倾注-蔗糖离心法从土样中分离AM真菌孢子,结合形态特征和18S r DNA AML1-AML2区序列的系统发育分析对AM真菌进行种属鉴定。结果显示:AM真菌能够侵染金佛山方竹根系,侵染率为25.27%;从土壤中分离得到6种优势AM真菌,其中4种通过形态特征和18S r DNA AML1-AML2区序列的系统发育分析,均能鉴定到种水平,分别为蜜色无梗囊霉Acaulospora mellea、珠状巨孢囊霉Gigaspora margarita、美丽盾巨孢囊霉Scutellospora calospora和孢璧两性球囊霉Ambispora leptotich,其余2种通过18S r DNA AML1-AML2区序列的系统发育分析鉴定为无梗囊霉属Acaulospora,结合形态特征鉴定为大型无梗囊霉Acaulospora colossica和疣状无梗囊霉Acaulospora tuberculata。展开更多
文摘目的研究微创颅内血肿抽吸术对高血压脑出血患者B型脑钠肽(BNP)、C反应蛋白(CRP)、同型半胱氨酸(Hcy)及生活质量的影响。方法选取2014年12月至2016年10月湖南中医院大学附属宁乡医院高血压脑出血患者80例,按处理方式分为常规清除组(n=38)和微创抽吸组(n=42),前者给予开颅骨窗血肿清除术治疗,后者给予微创颅内血肿抽吸术治疗,并随访6个月;观察两组美国国立卫生院神经功能缺损评分(national institute of health stroke scale,NIHSS)得分情况;BNP、CRP、Hcy水平(ELISA法);术中出血量、平均手术时间、住院时间、血肿清除率、并发症、死亡情况及治疗前、治疗后1、3、6个月的生活质量(ADL)。结果与常规清除组比较,微创抽吸组治疗前NIHSS得分和BNP、CRP、Hcy水平差异无统计学意义(P>0.05),治疗后,微创抽吸组治疗有效率高于常规清除组(90.48%vs.71.05%),NIHSS得分低于常规清除组,术中出血量、平均手术时间、住院时间和并发症均减少,血肿清除率增加,BNP、CRP、Hcy水平均降低,治疗后1、3、6个月ADL得分均增高,差异有统计学意义(P<0.05);两组病死率差异无统计学意义(P>0.05)。结论微创颅内血肿抽吸术治疗较开颅骨窗血肿清除术,对高血压脑出血患者的神经功能和血肿清除更具改善作用,降低血浆BNP、CRP、Hcy水平,减少并发症,改善其生活质量。
基金supported by Department of Physics and GXUNAOC Center for Astrophysics and Space Sciences,Guangxi UniversityThe National Natural Science Foundation of China(Nos.12027803,U1731239,12133003,12175241,U1938201,U1732266)the Guangxi Science Foundation(Nos.2018GXNSFGA281007,2018JJA110048).
文摘POLAR-2 is a gamma-ray burst(GRB)polarimeter that is designed to study the polarization in GRB radiation emissions,aiming to improve our knowledge of related mechanisms.POLAR-2 is expected to utilize an on-board polarimeter that is sensitive to soft X-rays(2-10 keV),called low-energy polarization detector.We have developed a new soft X-ray polari-zation detector prototype based on gas microchannel plates(GMCPs)and pixel chips(Topmetal).The GMCPs have bulk resistance,which prevents charging-up effects and ensures gain stability during operation.The detector is composed of low outgassing materials and is gas-sealed using a laser welding technique,ensuring long-term stability.A modulation factor of 41.28%±0.64% is obtained for a 4.5 keV polarized X-ray beam.A residual modulation of 1.96%±0.58% at 5.9 keV is observed for the entire sensitive area.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11205240 and 11265003, and the China Postdoctoral Science Foundation under Grant No 2012M510587.
文摘The working stability of thinner-thick gaseous electron multipliers （THGEMs）, which have been developed by the University of the Chinese Academy of Sciences and the Second Academy of China＇s Aerospace Science and Industry Corporation, is studied with an 8 keV x-ray on a Cu target. Gains of about 103–104 are achieved with a single board in Ar：iC4H10 （97：3）. Environmental factors, such as pressure, temperature and humidity are considered. The thinner-THGEMs are shown to perform stably over two months of studies.
基金Supported by the National Natural Science Foundation of China(No.11571135,11601429 and 11671320)the Natural Science Foundation of Shaanxi Province(No.2016JQ1002)
文摘A weighted graph is a graph in which every edge is assigned a non-negative real number. In a weighted graph, the weight of a path is the sum of the weights of its edges, and the weighed degree of a vertex is the sum of the weights of the edges incident with it. In this paper we give three weighted degree conditions for the existence of heavy or Hamilton paths with one or two given end-vertices in 2-connected weighted graphs.
基金Supported by the National Natural Science Foundation of China(No.11601429,11671320 and U1803263)the Fundamental Research Funds for the Central Universities(No.3102018zy035)
文摘A graph is called traceable if it contains a Hamilton path, i.e., a path passing through all the vertices. Let G be a graph on n vertices. G is called claw-o-1-heavy if every induced claw(K_(1,3)) of G has a pair of nonadjacent vertices with degree sum at least n-1 in G. In this paper we show that a claw-o-1-heavy graph G is traceable if we impose certain additional conditions on G involving forbidden induced subgraphs.
文摘从贵州省正安县、桐梓县和重庆市南川区的金佛山方竹林地采集方竹根系和根际土壤,采用碱解离-酸性品红染色法对根样进行染色,研究根系丛枝菌根侵染情况,利用湿筛倾注-蔗糖离心法从土样中分离AM真菌孢子,结合形态特征和18S r DNA AML1-AML2区序列的系统发育分析对AM真菌进行种属鉴定。结果显示:AM真菌能够侵染金佛山方竹根系,侵染率为25.27%;从土壤中分离得到6种优势AM真菌,其中4种通过形态特征和18S r DNA AML1-AML2区序列的系统发育分析,均能鉴定到种水平,分别为蜜色无梗囊霉Acaulospora mellea、珠状巨孢囊霉Gigaspora margarita、美丽盾巨孢囊霉Scutellospora calospora和孢璧两性球囊霉Ambispora leptotich,其余2种通过18S r DNA AML1-AML2区序列的系统发育分析鉴定为无梗囊霉属Acaulospora,结合形态特征鉴定为大型无梗囊霉Acaulospora colossica和疣状无梗囊霉Acaulospora tuberculata。
