Engineering incidents caused by the quality of tunnel construction and geological diseases occur from time to time,which not only causes many problems in engineering geophysical prospecting,but also provided a broad s...Engineering incidents caused by the quality of tunnel construction and geological diseases occur from time to time,which not only causes many problems in engineering geophysical prospecting,but also provided a broad space for the application and development of engineering geophysical prospecting technology.Non-destructive testing technology has made great progress.Combining the diagnosis and treatment of tunnel diseases,the ground penetrating radar non-destructive detection technology is discussed.展开更多
The hand-held soil plant analysis development （SPAD） chlorophyll meter nitrogen status of the potato and guiding fertilization recommendations N recommendation, it is critical to establish the threshold SPAD value h...The hand-held soil plant analysis development （SPAD） chlorophyll meter nitrogen status of the potato and guiding fertilization recommendations N recommendation, it is critical to establish the threshold SPAD value has proved to be a promising tool in evaluating the n the process of N evaluation of potato plants and （SPAD reading）, below which nitrogen supplement is required. And taking convenient using into account, the threshold needs to be dynamic throughout the potato growing season so that the users can test their potato plants and make fertilization decision at any growing time of potato. To complete this goal, field experiments with different nitrogen supply levels were conducted in different sites in northern China from 2009 to 2011. The results showed that threshold SPAD values decrease as the growing season progresses for all cultivars and planting sites. By statistical analysis, the threshold regression models were established respectively as： y=-0.003χ2-0.0507χ＋58.213 （y, threshold SPAD value; χ, days after emergence） for the potato cultivar Kexin 1, and y=-0.003χ2＋0.017χ＋52.489 （y, threshold SPAD value; χ, days after emergence） for the cultivar Shepody, from which, the threshold SPAD value at any day after emergence can be calculated.展开更多
Field experiments were conducted to study cotton nitrogen diagnosis and topdressing recommendation by measuring cotton tissue NO3- concentration with Reflectoquant. Results showed that the order of NO3- concentration ...Field experiments were conducted to study cotton nitrogen diagnosis and topdressing recommendation by measuring cotton tissue NO3- concentration with Reflectoquant. Results showed that the order of NO3- concentration in different cotton plant tissues is petiole > stem > leaf, and upper parts> lower parts. There was significant change in each growth period, which was, NO3- concentration in budding-blooming period was the highest whereas it was the lowest in full blooming period. NO3- concentration in the 4th expanding petiole is relatively stable and can sensitively indicate cotton nitrogen state so it was chosen as diagnosis tissue. NO3- content in budding-blooming period was significantly correlated with seed-cotton yield so it was chosen as diagnosis period. Primary cotton's nitrogen diagnosis index and amount of topdressing was formulated by regression of NO3- concentration against seed-cotton yield. It was not only rapid and accurate but also time-saving and flexible by using Reflectoquant to diagnose cotton nitrogen states and make side-dressing recommendation , so it is an agricultural technique with promising prospect.展开更多
A sustainable society requires an increase in electrified vehicles(xEVs) with a low environmental impact. Among various types of xEVs, battery electric vehicles (BEVs) with lithium-ion batteries(LIBs) have received co...A sustainable society requires an increase in electrified vehicles(xEVs) with a low environmental impact. Among various types of xEVs, battery electric vehicles (BEVs) with lithium-ion batteries(LIBs) have received considerable research attention.展开更多
针对当前东北地区玉米种植密度偏低、氮肥管理粗放及应用传统氮肥诊断方法存在的限制与不足等问题,以协同玉米增产与氮肥高效为目标,在黑龙江省哈尔滨市开展田间试验,设置2个种植密度、2个玉米品种和6个氮水平小区试验,应用新式主动冠...针对当前东北地区玉米种植密度偏低、氮肥管理粗放及应用传统氮肥诊断方法存在的限制与不足等问题,以协同玉米增产与氮肥高效为目标,在黑龙江省哈尔滨市开展田间试验,设置2个种植密度、2个玉米品种和6个氮水平小区试验,应用新式主动冠层传感器GreenSeeker,于玉米V5~V10期动态取样监测,建立回归模型,分析增密种植条件下不同玉米品种氮营养诊断指标变化,探究种植密度与品种对主动冠层传感器实时氮营养指标估测模型的影响。结果表明,适量施氮有利于改善植株氮营养状况、促进玉米增产;氮、密互作共同影响籽粒产量,种植密度由D6增至D8,籽粒产量与施氮量线性平台拐点由196.0、200.4 kg N·hm^(-2)分别增加至208.8、209.4 kg N·hm^(-2);氮浓度稀释曲线Y=34.0X-0.37在黑龙江地区适用,氮营养指数(Nitrogen nutrition index,NNI)诊断阈值主要受种植密度影响;GreenSeeker植被指数(Normalized difference vegetation index,NDVI)与地上部生物量、植株吸氮量、叶面积指数相关性较好,决定系数达0.75~0.89;NNI与NDVI相关模型决定系数较低,仅为0.49~0.58;NDVI对植株氮浓度诊断结果不佳。NDVI可用来准确诊断玉米氮营养状况,但需综合考虑氮肥用量、密度与品种耐密性对诊断模型准确性的影响。研究将GreenSeeker传感器最新诊断技术引入玉米增密群体氮营养诊断,评估氮浓度稀释曲线适用性,相关结果可为玉米增密群体的氮精准管理提供理论依据,未来具备区域大面积应用潜力。展开更多
Objective: To study the value of clonal analysis to the early diagnosis of myelodysplastic syndrome (MDS). Methods: Four types of clonal analyses were performed on the bone marrow samples from 50 patients suspected of...Objective: To study the value of clonal analysis to the early diagnosis of myelodysplastic syndrome (MDS). Methods: Four types of clonal analyses were performed on the bone marrow samples from 50 patients suspected of MDS: (1) Conventional Cytogenetics (CC) for clonal chromosomal abnormalities; (2) BrdU-Sister Chromatid Differentiation (BrdU-SCD) for cell cycle kinetics; (3) Fluorescence in Situ Hybridization (FISH) for trisomy 8; (4) Polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) for N-ras mutation. Results: The diagnosis of forty-three patients was compatible with the FAB criteria for MDS. The other seven cases didn’t meet the FAB criteria, with only one lineage of dyspoiesis or with no obvious dysplastic changes. Among these seven cases, two were morphologically diagnosed with suspicious refractory anemia, one with sideroblastic anemia, one with leukemoid reaction, one with hypercellular anemia and two with chronic aplastic anemia. Clonal analyses of the 7 patients showed that six cases had clonal karyotype abnormalities, four had prolonged cell cycle patterns, four had trisomy 8 of different proportions and one had mutation of the exon 1 of N-RAS. Thus, they were revaluated as MDS patients. Conclusion: The untypical MDS patients with one lineage dyspoiesis or without obvious dysplastic changes can be diagnosed early by combining multiple clonal analysis techniques such as CC, SCD, FISH and PCR-SSCR.展开更多
Objective Symptomatic predictors of influenza could assess risks and improve decisions about isolation and outpatient treatment. To develop such predictors, we undertook a prospective analysis of pandemic （HIN1） 200...Objective Symptomatic predictors of influenza could assess risks and improve decisions about isolation and outpatient treatment. To develop such predictors, we undertook a prospective analysis of pandemic （HIN1） 2009 and seasonal influenza （H3N2） in patients attending fever clinics. Methods From 1 May 2009 to 1 January 2010, all adult patients admitted to fever clinics for suspected influenza, confirmed by real time RT-PCR, were enrolled. Predictors of influenza virus infection were selected with logistic regression models. Measures of sensitivity, specificity, positive and negative likelihood ratios （LRs） were calculated to identify the best predictors. Results The clinical features and routine blood test results of influenza （H1N1） 2009 and seasonal influenza were similar. The positive and negative LRs of current US CDC influenza-like illness （ILl） criteria were modest in predicting influenza infection. Our modified clinic predictors improved the ability of the positive and negative LRs to recognize pandemic （HIN1） 2009 and seasonal influenza. The revised criteria are： fever ~ 38 ~C accompanied by at least one of the following--cough, arthralgia or relative iymphopenia. Conclusion Patients with symptoms and signs that meet the new criteria are likely to have influenza and timely antiviral therapy may be appropriate. In addition, physicians should ascertain if influenza is circulating within the community or if there is a contact history of influenza and combine this information with the newly developed criteria to clinically diagnose influenza.展开更多
文摘Engineering incidents caused by the quality of tunnel construction and geological diseases occur from time to time,which not only causes many problems in engineering geophysical prospecting,but also provided a broad space for the application and development of engineering geophysical prospecting technology.Non-destructive testing technology has made great progress.Combining the diagnosis and treatment of tunnel diseases,the ground penetrating radar non-destructive detection technology is discussed.
基金supported by the National Nature Science Foundation of China (31360502)the Pre-973 Project of China (2012CB126307)the Inner Mongolia Nature Science Foundation, China (2013ZD04)
文摘The hand-held soil plant analysis development （SPAD） chlorophyll meter nitrogen status of the potato and guiding fertilization recommendations N recommendation, it is critical to establish the threshold SPAD value has proved to be a promising tool in evaluating the n the process of N evaluation of potato plants and （SPAD reading）, below which nitrogen supplement is required. And taking convenient using into account, the threshold needs to be dynamic throughout the potato growing season so that the users can test their potato plants and make fertilization decision at any growing time of potato. To complete this goal, field experiments with different nitrogen supply levels were conducted in different sites in northern China from 2009 to 2011. The results showed that threshold SPAD values decrease as the growing season progresses for all cultivars and planting sites. By statistical analysis, the threshold regression models were established respectively as： y=-0.003χ2-0.0507χ＋58.213 （y, threshold SPAD value; χ, days after emergence） for the potato cultivar Kexin 1, and y=-0.003χ2＋0.017χ＋52.489 （y, threshold SPAD value; χ, days after emergence） for the cultivar Shepody, from which, the threshold SPAD value at any day after emergence can be calculated.
文摘Field experiments were conducted to study cotton nitrogen diagnosis and topdressing recommendation by measuring cotton tissue NO3- concentration with Reflectoquant. Results showed that the order of NO3- concentration in different cotton plant tissues is petiole > stem > leaf, and upper parts> lower parts. There was significant change in each growth period, which was, NO3- concentration in budding-blooming period was the highest whereas it was the lowest in full blooming period. NO3- concentration in the 4th expanding petiole is relatively stable and can sensitively indicate cotton nitrogen state so it was chosen as diagnosis tissue. NO3- content in budding-blooming period was significantly correlated with seed-cotton yield so it was chosen as diagnosis period. Primary cotton's nitrogen diagnosis index and amount of topdressing was formulated by regression of NO3- concentration against seed-cotton yield. It was not only rapid and accurate but also time-saving and flexible by using Reflectoquant to diagnose cotton nitrogen states and make side-dressing recommendation , so it is an agricultural technique with promising prospect.
基金partially supported by the New Energy Promotion Council (NEPC)。
文摘A sustainable society requires an increase in electrified vehicles(xEVs) with a low environmental impact. Among various types of xEVs, battery electric vehicles (BEVs) with lithium-ion batteries(LIBs) have received considerable research attention.
文摘针对当前东北地区玉米种植密度偏低、氮肥管理粗放及应用传统氮肥诊断方法存在的限制与不足等问题,以协同玉米增产与氮肥高效为目标,在黑龙江省哈尔滨市开展田间试验,设置2个种植密度、2个玉米品种和6个氮水平小区试验,应用新式主动冠层传感器GreenSeeker,于玉米V5~V10期动态取样监测,建立回归模型,分析增密种植条件下不同玉米品种氮营养诊断指标变化,探究种植密度与品种对主动冠层传感器实时氮营养指标估测模型的影响。结果表明,适量施氮有利于改善植株氮营养状况、促进玉米增产;氮、密互作共同影响籽粒产量,种植密度由D6增至D8,籽粒产量与施氮量线性平台拐点由196.0、200.4 kg N·hm^(-2)分别增加至208.8、209.4 kg N·hm^(-2);氮浓度稀释曲线Y=34.0X-0.37在黑龙江地区适用,氮营养指数(Nitrogen nutrition index,NNI)诊断阈值主要受种植密度影响;GreenSeeker植被指数(Normalized difference vegetation index,NDVI)与地上部生物量、植株吸氮量、叶面积指数相关性较好,决定系数达0.75~0.89;NNI与NDVI相关模型决定系数较低,仅为0.49~0.58;NDVI对植株氮浓度诊断结果不佳。NDVI可用来准确诊断玉米氮营养状况,但需综合考虑氮肥用量、密度与品种耐密性对诊断模型准确性的影响。研究将GreenSeeker传感器最新诊断技术引入玉米增密群体氮营养诊断,评估氮浓度稀释曲线适用性,相关结果可为玉米增密群体的氮精准管理提供理论依据,未来具备区域大面积应用潜力。
文摘Objective: To study the value of clonal analysis to the early diagnosis of myelodysplastic syndrome (MDS). Methods: Four types of clonal analyses were performed on the bone marrow samples from 50 patients suspected of MDS: (1) Conventional Cytogenetics (CC) for clonal chromosomal abnormalities; (2) BrdU-Sister Chromatid Differentiation (BrdU-SCD) for cell cycle kinetics; (3) Fluorescence in Situ Hybridization (FISH) for trisomy 8; (4) Polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) for N-ras mutation. Results: The diagnosis of forty-three patients was compatible with the FAB criteria for MDS. The other seven cases didn’t meet the FAB criteria, with only one lineage of dyspoiesis or with no obvious dysplastic changes. Among these seven cases, two were morphologically diagnosed with suspicious refractory anemia, one with sideroblastic anemia, one with leukemoid reaction, one with hypercellular anemia and two with chronic aplastic anemia. Clonal analyses of the 7 patients showed that six cases had clonal karyotype abnormalities, four had prolonged cell cycle patterns, four had trisomy 8 of different proportions and one had mutation of the exon 1 of N-RAS. Thus, they were revaluated as MDS patients. Conclusion: The untypical MDS patients with one lineage dyspoiesis or without obvious dysplastic changes can be diagnosed early by combining multiple clonal analysis techniques such as CC, SCD, FISH and PCR-SSCR.
基金supported by Chinese National Programs for High Technology Research and Development (863 Program,2008AA02Z416)
文摘Objective Symptomatic predictors of influenza could assess risks and improve decisions about isolation and outpatient treatment. To develop such predictors, we undertook a prospective analysis of pandemic （HIN1） 2009 and seasonal influenza （H3N2） in patients attending fever clinics. Methods From 1 May 2009 to 1 January 2010, all adult patients admitted to fever clinics for suspected influenza, confirmed by real time RT-PCR, were enrolled. Predictors of influenza virus infection were selected with logistic regression models. Measures of sensitivity, specificity, positive and negative likelihood ratios （LRs） were calculated to identify the best predictors. Results The clinical features and routine blood test results of influenza （H1N1） 2009 and seasonal influenza were similar. The positive and negative LRs of current US CDC influenza-like illness （ILl） criteria were modest in predicting influenza infection. Our modified clinic predictors improved the ability of the positive and negative LRs to recognize pandemic （HIN1） 2009 and seasonal influenza. The revised criteria are： fever ~ 38 ~C accompanied by at least one of the following--cough, arthralgia or relative iymphopenia. Conclusion Patients with symptoms and signs that meet the new criteria are likely to have influenza and timely antiviral therapy may be appropriate. In addition, physicians should ascertain if influenza is circulating within the community or if there is a contact history of influenza and combine this information with the newly developed criteria to clinically diagnose influenza.
